CN104655975B - The recognition methods of battery micro-short circuit - Google Patents
The recognition methods of battery micro-short circuit Download PDFInfo
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- CN104655975B CN104655975B CN201510067979.9A CN201510067979A CN104655975B CN 104655975 B CN104655975 B CN 104655975B CN 201510067979 A CN201510067979 A CN 201510067979A CN 104655975 B CN104655975 B CN 104655975B
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- 238000000034 method Methods 0.000 title claims abstract description 53
- 239000004020 conductor Substances 0.000 claims abstract description 176
- 238000001514 detection method Methods 0.000 claims abstract description 76
- 230000005611 electricity Effects 0.000 claims description 15
- 238000010586 diagram Methods 0.000 description 11
- 239000000178 monomer Substances 0.000 description 10
- 238000009795 derivation Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
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Abstract
Present invention arrangement in batteries in parallel connection group has the connection conductor from proportionality action, and resistance and voltage check device are set in the connection conductor for having from proportionality action, the resistance is corresponding from equalizing voltage from euqalizing current with the batteries in parallel connection group with one, by comparing the voltage of voltage check device detection with being somebody's turn to do the size from equalizing voltage, it is possible to identify whether there occurs micro-short circuit for the batteries in parallel connection group；The present invention furthermore provides a kind of method for judging which battery cell generation micro-short circuit in the batteries in parallel connection group.Raising of the recognition methods of battery micro-short circuit provided by the invention for the security of the product using batteries in parallel connection group has key effect.
Description
Technical field
The invention belongs to cell art, and in particular to it is a kind of batteries in parallel connection group is occurred in the process of running it is micro- short
The method that road phenomenon is identified.
Background technology
In recent years, the safety hazards of lithium-ion-power cell occasionally have generation, and the majority safety of lithium-ion-power cell is asked
Topic can be controlled or alleviated by the exterior measures such as electrical management or temperature treatments, however, hot as caused by micro-short circuit
Out of control is the problem being difficult to resolve the most intractable in all safety problems, and it can not pass through existing electrical management or temperature treatment etc.
The exterior measures effectively control and alleviate.
So-called micro-short circuit refers to inside battery cell between (referred to as internal short-circuit) or the positive and negative terminals of battery cell (be referred to as outer
Short circuit) occur small short circuit phenomenon.In cell fabrication processes being mixed into of impurity, diaphragm quality is not up to standard, composition battery
Welding bubble during group tab welding, during battery use pole piece drop off or the crimp of battery etc. can cause battery
The generation of micro-short circuit.It micro-short circuit occurs will not directly result in battery at battery initial stage to burn out, but lithium ion battery can be caused from putting
The phenomenons such as TV university, capacity be low, and large-scale short circuit phenomenon may be developed into during the follow-up use of battery, so as to lead
Cause battery catches fire blast.
At present, battery micro-short circuit discovery and prediction be still a difficult point in cell safety problem.Prior art is led to
Its pressure drop is tested after a period of time usually through battery is shelved method detects whether battery occurs micro-short circuit, and this method is not
Only take time and effort, reliability is low, and the micro-short circuit phenomenon of the generation during battery use can not be identified in time
And detection, the micro-short circuit that may make to occur in cell operation are converted to large-scale short circuit phenomenon, serious peace occur
Full hidden danger.
The content of the invention
In view of this, it is necessory to provide it is a kind of the micro-short circuit phenomenon that occurs in cell operation can be carried out it is real-time
Detection and the battery micro-short circuit recognition methods of identification.
A kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is negative that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and one
Pole output end, N number of parallel branch pass through the cathode output end and the outside output current of cathode output end, Mei Yisuo
Stating parallel branch includes a battery cell, wherein, N ＞ 1；
S2, set in the batteries in parallel connection group closed-loop shaped connect conductor, the closed-loop shaped connect conductor with it is each described
Parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with N number of battery cell
Negative or positive electrode electrically connects and forms an annular channels；
S3, a resistance is respectively provided with the closed-loop shaped connection conductor between per the two neighboring battery cell, any
A first voltage detection means and a second voltage detection means in parallel are distinguished on two resistance；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in closed-loop shaped connection conductorSBy often
One resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and set one
Voltage pre-set threshold value, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that the first voltage detection means detects is gathered in real time
VAThe voltage V detected with the second voltage detection meansB, when detecting VAAnd VBIn the absolute value of any one be more than institute
When stating voltage pre-set threshold value, judge that there occurs micro-short circuit for the batteries in parallel connection group.
A kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is negative that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and one
Pole output end, N number of parallel branch pass through the cathode output end and the outside output current of cathode output end, Mei Yisuo
Stating parallel branch includes a battery cell, wherein, N is even number；
S2, set in the batteries in parallel connection group closed-loop shaped connect conductor, the closed-loop shaped connect conductor with it is each described
Parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with N number of battery cell
Negative or positive electrode electrically connects and forms an annular channels；
S3, a resistance is respectively provided with the closed-loop shaped connection conductor between per the two neighboring battery cell, any
One voltage check device of resistor in parallel one；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in closed-loop shaped connection conductorSBy often
One resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and set one
Voltage pre-set threshold value, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that the voltage check device detects is gathered in real time, when this
When the absolute value for the voltage that voltage check device detects is more than the voltage pre-set threshold value, judge the batteries in parallel connection group there occurs
Micro-short circuit.
A kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is negative that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and one
Pole output end, N number of parallel branch pass through the cathode output end and the outside output current of cathode output end, Mei Yisuo
Stating parallel branch includes a battery cell, wherein, N ＞ 1；
S2, in the batteries in parallel connection group set a non-enclosed connection conductor, this it is non-enclosed connection conductor with it is each
The parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with N number of battery list
The negative or positive electrode electrical connection of body；
S3, a resistance is respectively provided with the non-enclosed connection conductor between per the two neighboring battery cell
300, in any one of voltage check device of resistor in parallel one；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in the non-enclosed connection conductorSBy,
Each resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and set
One voltage pre-set threshold value, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that the voltage check device 400 detects is gathered in real time,
When the absolute value for the voltage that the voltage check device detects is more than the voltage pre-set threshold value, judge that the batteries in parallel connection group is sent out
Micro-short circuit is given birth to.
A kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is negative that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and one
Pole output end, N number of parallel branch pass through the cathode output end and the outside output current of cathode output end, Mei Yisuo
Stating parallel branch includes the M battery cells being connected in series, wherein, N ＞ 1, M ＞ 1；
S2, the battery cell that same row is located in N number of parallel branch is formed one group, forms M battery cell group,
Each battery cell group includes N number of battery cell, sets M+1 closed-loop shaped to connect in the batteries in parallel connection group
Conductor, closed-loop shaped connection conductor are arranged alternately with the battery cell group, each closed-loop shaped connect conductor with it is each
The parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with a battery
The negative or positive electrode electrical connection of N number of battery cell described in monomer group；
S3, conductor is connected for each closed-loop shaped, a resistance is respectively provided between per the two neighboring tie point,
A first voltage detection means and a second voltage detection means in parallel are being distinguished described in any two on resistance；
S4, in the batteries in parallel connection group running, have one from euqalizing current in each closed-loop shaped connection conductor
ISFlow through, each resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage
VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, gather what each first voltage detection means detected in real time
Voltage VAThe voltage V detected with each second voltage detection meansB, when detecting two neighboring closed-loop shaped connection
In conductor, the V of each closed-loop shaped connection conductorAAnd VBIn the absolute value of any one be all higher than the voltage pre-set threshold value
When, judgement is connected the conductor electrical connection battery cell group with the two neighboring closed-loop shaped simultaneously, and there occurs micro-short circuit.
A kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is negative that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and one
Pole output end, N number of parallel branch pass through the cathode output end and the outside output current of cathode output end, Mei Yisuo
Stating parallel branch includes the battery cells that M is connected in series, wherein, N is even number, M ＞ 1；
S2, the battery cell that same row is located in N number of parallel branch is formed one group, forms M battery cell group,
Each battery cell group includes N number of battery cell, sets M+1 closed-loop shaped to connect in the batteries in parallel connection group
Conductor, closed-loop shaped connection conductor are arranged alternately with the battery cell group, each closed-loop shaped connect conductor with it is each
The parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with a battery
The negative or positive electrode electrical connection of N number of battery cell described in monomer group；
S3, conductor is connected for each closed-loop shaped, a resistance is respectively provided between per the two neighboring tie point,
In any one of voltage check device of resistor in parallel one；
S4, in the batteries in parallel connection group running, have one from euqalizing current in each closed-loop shaped connection conductor
ISFlow through, each resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage
VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that each voltage check device detects is gathered in real time,
When the absolute value of voltage that the voltage check device in the two neighboring closed-loop shaped connection conductor detects is all higher than the voltage
During pre-set threshold value, judgement is connected the conductor electrical connection battery cell group with the two neighboring closed-loop shaped simultaneously, and there occurs micro-
Short circuit.
Present invention arrangement in batteries in parallel connection group has from proportionality action with the connection conductor from proportionality action, and at this
Connection conductor in resistance and voltage check device be set, the resistance has one corresponding from euqalizing current with the batteries in parallel connection group
From equalizing voltage, by comparing the voltage of voltage check device detection with being somebody's turn to do the size from equalizing voltage, it is possible to identify
Whether there occurs micro-short circuit for the batteries in parallel connection group.The recognition methods of battery micro-short circuit provided by the invention is for using batteries in parallel connection
The raising of the security of the product of group has key effect.
Brief description of the drawings
Fig. 1 a are that the setting closed-loop shaped in batteries in parallel connection group that first embodiment of the invention provides connects conductor, resistance and electricity
Press the schematic diagram of detection means；Fig. 1 b are the topology diagram of element annexation in Fig. 1 a dotted line frames.
Fig. 2 is that the anti-principle for pushing away the generation micro-short circuit of which battery cell 120 of first embodiment of the invention illustrates schematic diagram.
Fig. 3 a, 3b, 3c, 3d be first embodiment of the invention embodiment 1 when N be even number and y ∈ [1, N/2) when, it is counter to push away hair
The explanation schematic diagram of raw micro-short circuit battery cell method for numbering serial.
Fig. 4 a, 4b, 4c, 4d be first embodiment of the invention embodiment 1 when N is even number and y ∈ (N/2, N), it is counter to push away hair
The explanation schematic diagram of raw micro-short circuit battery cell method for numbering serial.
Fig. 5 a, 5b be first embodiment of the invention embodiment 1 when N is even number and y=N/2, it is counter push away occur micro-short circuit electricity
The explanation schematic diagram of pond monomer method for numbering serial.
Fig. 6 a are that the setting closed-loop shaped in batteries in parallel connection group that second embodiment of the invention provides connects conductor, resistance and electricity
Press the schematic diagram of detection means；Fig. 6 b are the topology diagram of element annexation in Fig. 6 a dotted line frames.
Fig. 7 is that the setting closed-loop shaped in batteries in parallel connection group that third embodiment of the invention provides connects conductor, resistance and electricity
Press the schematic diagram of detection means.
Fig. 8 be fourth embodiment of the invention provide set in batteries in parallel connection group it is non-enclosed connection conductor, resistance with
The schematic diagram of voltage check device.
Fig. 9 sets closed connection conductor, resistance and electricity for what fifth embodiment of the invention provided in batteries in parallel connection group
Press the schematic diagram of detection means.
Main element symbol description
Batteries in parallel connection group 100,500
Parallel branch 110,510
Battery cell 120
Battery cell group 520
Cathode output end 130
Cathode output end 140
Closed-loop shaped connects conductor 210,220,230
Non-enclosed connection conductor 240
Tie point 211,221,231,241
Resistance 300
Current sensing means 400,410,420
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Make below with reference to recognition methods of the drawings and the specific embodiments to battery micro-short circuit provided by the invention further
Detailed description.
Referring to Fig. 1, first embodiment of the invention provides a kind of recognition methods of battery micro-short circuit, including：
S11 a, there is provided battery pack 100 in parallel, the batteries in parallel connection group 100 includes N number of parallel branch 110, a positive pole exports
The cathode output end 140 of end 130 and one, N number of parallel branch 110 are defeated by the cathode output end 130 and negative pole
Going out 140 outside output currents of end, each parallel branch 110 includes a battery cell 120, wherein, N ＞ 1；
S12, a closed-loop shaped is set to connect conductor 210, closed-loop shaped connection conductor 210 in the batteries in parallel connection group 100
There is one first tie point 211 with each parallel branch 110, the closed-loop shaped connects conductor 210 and connected by N number of described first
Contact 211 electrically connects with the negative or positive electrode of N number of battery cell 120 simultaneously and forms an annular channels；
S13, a resistance is respectively provided with the closed-loop shaped connection conductor 210 between per the two neighboring battery cell 120
300, a first voltage detection means 410 and a second voltage detection means in parallel are distinguished on resistance described in any two 300
420；
S14, in the running of batteries in parallel connection group 100, have one from euqalizing current I in closed-loop shaped connection conductor 210S
By the way that each resistance 300 has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage
VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S15, in the running of batteries in parallel connection group 100, the first voltage detection means 410 is gathered in real time and is detected
Voltage VAThe voltage V detected with the second voltage detection means 420B, when detecting VAAnd VBIn any one absolute
When value is more than the voltage pre-set threshold value, judge that there occurs micro-short circuit for the batteries in parallel connection group 100.
In step s 11, N number of parallel branch 110 is connected in parallel.The cathode output end 130 and the negative pole are defeated
Go out end 140 be respectively N number of parallel branch 110 two shared end points, N number of parallel branch 110 by it is described just
Pole output end 130 and the outside power output electric current of cathode output end 140, the power current of the batteries in parallel connection group 100 output are
The power current sum of the output of N number of parallel branch 110.The battery cell 120 can be but not limited to lithium-ion electric
Pond, nickel-cadmium cell, Ni-MH battery, alkali manganese rechargeable battery or lead accumulator.It is each in the running of batteries in parallel connection group 100
The battery cell 120 passes through the corresponding outside power output electric current of parallel branch 110.
In step s 12, the closed-loop shaped connection conductor 210 is a conductor with uniform resistance.Of the invention real
Apply in example, the closed-loop shaped connection conductor 210 is joined end to end by a straight wire to be formed.The closed-loop shaped connection conductor 210 can
Electrically connected simultaneously with the positive pole of N number of battery cell 120, negative pole that also can be simultaneously with N number of battery cell 120 is electrically connected
Connect.The closed-loop shaped connection conductor 210 and one and only one described first tie point 211 of each parallel branch 110.N
Individual first tie point 211, which is spaced, not to be overlapped.
N number of battery cell 120 can be connected conductor 210 by the closed-loop shaped and be realized from balanced, i.e., described closed-loop shaped company
The power current equalization that conductor 210 can make to flow through each battery cell 120 is connect, so as to improve the batteries in parallel connection group 100
Reliability and stability.Under normal circumstances, i.e., when micro-short circuit does not occur for the batteries in parallel connection group 100, the closed-loop shaped connection
Only from euqalizing current I in conductor 210SBy being somebody's turn to do from euqalizing current ISVery little, generally 1~2mA, each resistance 300
One is respectively provided with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS.If there is a battery list in the batteries in parallel connection group 100
Body 120 is there occurs micro-short circuit, then all to have electric current to pass through described for other all battery cells 120 in the batteries in parallel connection group 100
Closed-loop shaped connection conductor 210 flows to location of short circuit, and electric current caused by this situation is referred to as short circuit current by the present invention, when described
When having the short circuit current to flow through in resistance 300, the resistance 300 has a short-circuit voltage corresponding with the short circuit current.It is each described
Short circuit current caused by battery cell 120 can be hundreds of milliamperes of supreme kilo-amperes, and the short circuit current is much larger than should be from euqalizing current IS,
Therefore the short-circuit voltage also much larger than described from equalizing voltage VS, it is possible thereby to judge in the batteries in parallel connection group 100 whether
There is micro-short circuit phenomenon.
In step s 13, the resistance 300 is arranged between two neighboring first tie point 211, the electricity in parallel
N number of resistance 300 is provided with pond group 100 altogether, the resistance of N number of resistance 300 is essentially identical.Setting described first
After voltage check device 410 and second voltage detection means 420, further N number of battery cell 120 can be numbered.
Specifically, it is starting point with the first voltage detection means 410, according to clock-wise order successively to N number of battery cell
120 are numbered, respectively 1,2 ... N-1, N battery cells, then the first voltage detection means 410 be arranged on No. N and 1
Between number battery cell.Set the second voltage detection means 420 to be arranged between No. y and (y+1) number battery cell, y ∈
[1, N), after step s 12, y is a known numerical value.Also further N number of resistance 300 can be numbered, it is each
The numbering of the resistance 300 is identical with the numbering of its first battery cell 120 of counter clockwise direction, such as will be located at No. 1 battery
The numbering of resistance 300 between monomer and No. 2 battery cells is No. 1 resistance.It is appreciated that other method can also be used to described
N number of battery cell 120 and resistance 300 are numbered, such as N number of battery cell 120 can be entered according to sequence counter-clockwise
Line number.
In step S14, the actual moving process of the batteries in parallel connection group 100 can be simulated in advance, it is described from balanced to detect
Voltage VS.Also can when the actual motion of batteries in parallel connection group 100 just proceeds by, by the first voltage detection means 410 or
The voltage that the second voltage detection means 420 detects is set as described from equalizing voltage VS.Those skilled in the art also may be used
To be adjusted as needed to the voltage pre-set threshold value, such as can be adjusted to described from equalizing voltage VS5 times of absolute value
Above, more than 10 times, more than 20 times etc..Preferably, the voltage pre-set threshold value is described from equalizing voltage VSThe 5 of absolute value
~1000 times.
In step S15, there occurs micro-short circuit in the running of batteries in parallel connection group 100 for setting x battery cells
Phenomenon, it is short-circuit caused by each battery cell 120 because closed-loop shaped connection conductor 210 be enclosed annular path
Electric current has two paths to flow to x battery cells, and now, short circuit current caused by the battery cell 120 can select most
Short path flows to x battery cells, and the present invention is referred to as shortest path principle.It is former according to above-mentioned numbering when N is odd number
Then, short circuit current is not had in the symmetrically arranged resistance 300 of battery cell 120 in topological structure with micro-short circuit occurs to lead to
Cross, had in other resistance 300 short circuit current by, for example, shown in Fig. 1 b when (N+1)/No. 2 battery cell occur micro-short circuit
When, do not have in N resistance short circuit current by, therefore the first voltage detection means 410 can't detect the short-circuit voltage,
But short circuit current is had in y resistance by the way that therefore the second voltage detection means 420 is able to detect that the short-circuit voltage.
When N is even number, no matter which battery cell 120 has short circuit current there occurs micro-short circuit, in all resistance 300 and led to
Cross, the first voltage detection means 410 and second voltage detection means 420 can detect the short-circuit voltage.Therefore, only
Two voltage check devices in parallel need to be distinguished on any two resistance 300, when any one voltage check device detects far
More than described from equalizing voltage VSShort-circuit voltage when, you can judge that there occurs micro-short circuit for the batteries in parallel connection group 100.
It is appreciated that multiple voltage check devices in parallel can be also distinguished on multiple resistance 300, when any one voltage is examined
Device is surveyed to detect much larger than described from equalizing voltage VSShort-circuit voltage when, you can judge the batteries in parallel connection group 100 there occurs
Micro-short circuit.It is appreciated that when the batteries in parallel connection group 100 includes battery cell 120 described in even number, only need to be in an electricity
A current sensing means in parallel in resistance 300, now, micro-short circuit, the voltage check device occur for any battery cell 120
It can detect much larger than described from equalizing voltage VSShort-circuit voltage.
After the batteries in parallel connection group 100 is determined there occurs micro-short circuit, which specific battery cell can be also further judged
120 there occurs micro-short circuit.Illustrated below in a manner of counter push away and judge that first embodiment of the invention which battery cell 120 occurs
The method of micro-short circuit illustrates.Referring to Fig. 2, when micro-short circuit occurs for No. 5 battery cells, according to shortest path principle, 1
Number, short circuit current caused by No. 7 and No. 6 battery cells will flow to No. 5 battery cells in the counterclockwise direction, and No. 2, No. 3 and No. 4
Short circuit current caused by battery cell will flow to No. 5 battery cells along clockwise direction, it is known that the voltage direction of No. 7 resistance is inverse
Clockwise, the voltage direction of No. 3 resistance is clockwise；According to parallel circuit shunting principle, it is known that only No. 1 battery list
Short circuit current caused by body flows through No. 7 resistance, and No. 2, short circuit current flows through No. 3 resistance caused by No. 3 battery cells, due to
Prior art would generally select the good battery cell of uniformity to form battery pack, therefore caused by each battery cell 120
Short circuit current is basically identical, and the resistance of each resistance 300 is also essentially identical, then understands first voltage detection means 410 and the
The voltage ratio that two voltage check devices 420 detect is -2/1.Analysis is understood according to more than, for known to N, y it is described simultaneously
Join battery pack 100, can be according to VAAnd VBVoltage direction and ratio counter push away x values, you can specific which battery cell of judgement
120 there occurs micro-short circuit.It is micro- will to judge first embodiment of the invention which battery cell 120 occurs according to above-mentioned analysis below
The method of short circuit is further described in detail.
The clockwise direction that first embodiment of the invention connects the closed-loop shaped conductor 210 is set as reference voltage side
To.The sizes values of short circuit current caused by each battery cell 120 are also set as i by the present invention, by each resistance 300
Resistance is set as R.
In embodiment 1, positive pole of the closed-loop shaped connection conductor 210 simultaneously with N number of battery cell 120 is electrically connected
Connect.
First, refer to Fig. 3 to Fig. 5, when N is even number, if x battery cells there occurs micro-short circuit, with x battery lists
The two paths length that short circuit current caused by the symmetrically arranged battery cell 120 of body flows to x battery cells are identical, therefore this is short
Road electric current will be equally divided into two parts respectively along clockwise direction with counterclockwise flow to x battery cells.
1. when y ∈ [1, N/2) when：
(1) Fig. 3 a are referred to, if x ∈ [1, y], then VA>0, VB<0, and VA=[N- (x+N/2)+1/2] iR, VB=-
[(x+N/2)-(y+1)+1/2] iR, can draw：
(2) Fig. 3 b are referred to, if x ∈ (y, N/2], then VA>0, VB>0, and VA=[N- (x+N/2)+1/2] iR, VB=
[N- (x+N/2)+1/2+y] iR, can draw：
(3) Fig. 3 c are referred to, if x ∈ (N/2, y+N/2], then VA<0, VB<0, and VA=-[x-N/2-1+1/2] iR, VB
=[y- (x-N/2)+1/2] iR, can draw：
(4) Fig. 3 d are referred to, if x ∈ (y+N/2, N], then VA<0, VB<0, and VA=- [(x-N/2) -1+1/2] iR, VB
=-[(x-N/2)-(y+1)+1/2] iR, it can draw：
2. work as y ∈ (N/2, N)：
(1) Fig. 4 a are referred to, if x ∈ [1, y-N/2], then VA>0, VB>0, and VA=[N- (x+N/2)+1/2] iR, VB
=[y- (x+N/2)+1/2] iR, can draw：
(2) Fig. 4 b are referred to, if x ∈ (y-N/2, N/2], then VA>0, VB<0, and VA=[N- (x+N/2)+1/2] iR,
VB=-[(x+N/2)-(y+1)+1/2] * iR, it can draw：
(3) Fig. 4 c are referred to, if x ∈ (N/2, y], then VA<0, VB<0, and VA=- [(x-N/2) -1+1/2] iR, VB
=- [(x-N/2) -1+1/2+N-y] iR, it can draw：
(4) Fig. 4 d are referred to, if x ∈ (y, N], then VA<0, VB>0, and VA=- [(x-N/2) -1+1/2] iR, VB=
[y- (x-N/2)+1/2] iR, can draw：
3. as y=N/2：
(1) 5a is referred to, if x ∈ [1, N/2], then VA>0, VB<0, and VA=[N- (x+N/2)+1/2] iR, VB=-
[(x+N/2)-(N/2+1)+1/2] i=- [(x+N/2)-(y+1)+1/2] iR, can draw：
(2) 5b is referred to, if x ∈ [N/2, N], then VA<0, VB>0, and VA=- [(x-N/2) -1+1/2] iR, VB=
[N/2- (x-N/2)+1/2] i=[y- (x-N/2)+1/2] iR, can draw：
Analyzed with reference to more than, due to after step s 14, N, y, IA、IBValue be known, therefore after step s 14,
X is calculated using following method：
When y ∈ [1, N/2]:
(1) if VB>0, or VB<0 and VA<0, then calculate x using formula 2；
(2) if VB<0 and VA>0, then calculate x using formula 1.
As y ∈ (N/2, N)：
(1) if VA>0, or VA<0 and VB<0, then calculate x using formula 1；
(2) if VA<0 and VB>0, then calculate x using formula 2.
2nd, when N is odd number, derivation when with reference to above-mentioned N being even number, have：
1. work as y ∈ [1, (N-1)/2]：
(1) if x ∈ [1, y], then VA>0, VB<0, and
(2) if x ∈ (y, (N-1)/2], then VA>0, VB>0, and
(3) if x=(N+1)/2, VA=0, VB>0；
(4) if x ∈ ((N+1)/2, y+ (N-1)/2), then VA<0, VB>0, and
(5) if x=y+ (N-1)/2, VA<0 and VB=0；
(6) if x ∈ (y+ (N-1)/2, N], then VA<0, VB<0, and
2. when y ∈ [(N+1)/2), N) when：
(1) if x ∈ [1, y- (N-1)/2), then VA>0, VB>0, and
(2) if x=y- (N-1)/2, VA>0, VB=0；
(3) if x ∈ (y- (N-1)/2, (N+1)/2), then VA>0, VB<0, and
(4) if x=(N+1)/2, VA=0, VB<0；
(5) if x ∈ (N+1)/2, y], then VA<0, VB<0, and
(6) if x ∈ (y, N], then VA<0, VB>0, and
Analyzed with reference to more than, after step s 14, x is calculated using following method：
When y ∈ [1, (N-1)/2]：
(1) if VA=0 and VB>0, then x=(N+1)/2；
(2) if VA<0 and VB=0, then x=y+ (N-1)/2；
(3) if VB>0, or VB<0 and VA<0, then calculate x using formula 2；
(4) if VB<0 and VA>0, then calculate x using formula 1.
When y ∈ [(N+1)/2), N) when：
(1) if VA=0 and VB<0, then x=(N+1)/2；
(2) if VA>0 and VB=0, then x=y- (N-1)/2；
(3) if VA>0, or VA<0 and VB<0, then calculate x using formula 1；
(4) if VA<0 and VB>0, then calculate x using formula 2.
In example 2, negative pole of the closed-loop shaped connection conductor 210 simultaneously with N number of battery cell 120 is electrically connected
Connect.
When N, y, x are known, with embodiment 1 by the closed-loop shaped be connected conductor 210 simultaneously with N number of battery cell
120 positive pole electrical connection is compared, the V that embodiment 2 detectsAThe V detected with embodiment 1AMutually voltage is absolute on the contrary for voltage direction
It is worth V equal in magnitude, embodiment 2 detectsBThe V detected with embodiment 1BVoltage direction mutually absolute value of voltage size phase on the contrary
Deng the derivation of reference implementation example 1, then have in the lump：
First, when N is even number, after step s 14, x is calculated using following method：
When y ∈ [1, N/2]：
(1) if VB<0, or VB>0 and VA>0, then calculate x using formula 2；
(2) if VB>0 and VA<0, then calculate x using formula 1.
As y ∈ (N/2, N)：
(1) if VA<0, or VA>0 and VB>0, then calculate x using formula 1；
(2) if VA>0 and VB<0, then calculate x using formula 2.
2nd, when N is odd number, after step s 14, x is calculated using following method：
When y ∈ [1, (N-1)/2]：
(1) if VA=0 and VB<0, then x=(N+1)/2；
(2) if VA>0 and VB=0, then x=y+ (N-1)/2；
(3) if VB<0, or VB>0 and VA>0, then calculate x using formula 2；
(4) if VB>0 and VA<0, then calculate x using formula 1.
When y ∈ [(N+1)/2), N) when：
(1) if VA=0 and VB>0, then x=(N+1)/2；
(2) if VA<0 and VB=0, then x=y- (N-1)/2；
(3) if VA<0, or VA>0 and VB>0, then calculate x using formula 1；
(4) if VA>0 and VB<0, then calculate x using formula 2.
Referring to Fig. 6, second embodiment of the invention provides a kind of recognition methods of battery micro-short circuit, including：
S21, there is provided the batteries in parallel connection group 100, wherein, N ＞ 1；
S22, positive pole closed-loop shaped connection conductor 220 and one negative pole closed-loop shaped is set to connect in the batteries in parallel connection group 100
Conductor 230 is connect, positive pole closed-loop shaped connection conductor 220 has one second tie point 221 with each parallel branch 110, should
It is simultaneously electric with the positive pole of N number of battery cell 120 by N number of second tie point 221 that positive pole closed-loop shaped connects conductor 220
Connect and form a positive pole annular channels, the negative pole closed-loop shaped connection conductor 230 and each parallel branch 110 have one the
Three tie points 231, the negative pole closed-loop shaped connect conductor 230 by N number of 3rd tie point 231 simultaneously with N number of battery
The negative pole of monomer 120 electrically connects and forms a negative pole annular channels；
S23, a resistance 300 is respectively provided between per the two neighboring battery cell 120, each resistance 300 is equal
It is arranged on the positive pole closed-loop shaped connection conductor 220 or on negative pole closed-loop shaped connection conductor 230, and the positive pole closed loop
Shape connection conductor 220 connects with negative pole closed-loop shaped is provided with the resistance 300 on conductor 230, connect in the positive pole closed-loop shaped
A first voltage detection means 410 in parallel on the resistance 300 on conductor 220 is connect, conductor is connected in negative pole closed-loop shaped
A second voltage detection means 420 in parallel on the resistance 300 on 220；
S24, in the running of batteries in parallel connection group 100, positive pole closed-loop shaped connection conductor 220 and the negative pole closed-loop shaped
Have one from euqalizing current I in connection conductor 230SFlow through, each resistance 300 has one with being somebody's turn to do from euqalizing current ISIt is corresponding
From equalizing voltage VS, detection should be from equalizing voltage VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is described
From equalizing voltage VSMore than 3 times of absolute value；
S25, in the running of batteries in parallel connection group 100, the first voltage detection means 410 is gathered in real time and is detected
Voltage VAThe voltage V detected with the second voltage detection means 420B, when detecting VAAnd VBIn any one absolute
When value is more than the voltage pre-set threshold value, judge that there occurs micro-short circuit for the batteries in parallel connection group 100.
Second embodiment of the invention is essentially identical with first embodiment of the invention, and its difference essentially consists in, described
Two closed-loop shapeds are provided with batteries in parallel connection group 100 and connect conductors, two closed-loop shapeds connection conductors respectively with N number of battery
Positive pole and the negative pole electrical connection of monomer 120, two voltage check devices are separately positioned on two closed-loop shaped connection conductors.Institute
State closed-loop shaped connection conductor 210, positive pole closed-loop shaped connection conductor 220 and negative pole closed-loop shaped connection conductor 230 label it is different but
Function phase is same.In embodiments of the present invention, closed-loop shaped connection conductor 210, positive pole closed-loop shaped connection conductor 220 and the negative pole
Closed-loop shaped connection conductor 230 joins end to end to be formed by a straight wire.
In step S23, as long as arranging quantity identical resistance 300 between per the two neighboring battery cell 120,
N number of battery cell 120 can be made to connect conductor 220 by the positive pole closed-loop shaped and connect conductor with the negative pole closed-loop shaped
230 realize from balanced.It is appreciated that the positive pole closed-loop shaped that can also be between per the two neighboring battery cell 120
Connection conductor 220 connects with the negative pole closed-loop shaped arranges the resistance 300 on conductor 230, but now described in attention
First voltage detection means 410 and the second voltage detection means 420 need to be connected in parallel on Bu Tong two neighboring battery cell 120 it
Between, to ensure when N is odd number, micro-short circuit, the He of first voltage detection means 410 occur for any one battery cell 120
Any one in the second voltage detection means 420 is able to detect that the short-circuit voltage.
After the batteries in parallel connection group 100 is determined there occurs micro-short circuit, it can also further judge which battery cell 120 is sent out
Micro-short circuit is given birth to.Compared with the embodiment 1 in first embodiment of the invention, when N, y, x are known, second embodiment of the invention
The V detectedAThe V detected with first embodiment of the invention embodiment 1AVoltage direction is equal with absolute value of voltage size,
The V detected of second embodiment of the inventionBThe V detected with first embodiment of the invention embodiment 1BVoltage direction phase is on the contrary
Absolute value of voltage is equal in magnitude, and the derivation of reference implementation example 1, then have in the lump：
First, when N is even number, with reference to first embodiment of the invention embodiment 1, can derive：
1. when y ∈ [1, N/2) when：
(1) if x ∈ [1, y], then VA>0, VB>0, and
(2) if x ∈ (y, N/2], then VA>0, VB<0, and
(3) if x ∈ (N/2, y+N/2], then VA<0, VB<0, and
(4) if x ∈ (y+N/2, N], then VA<0, VB>0, and
2. work as y ∈ (N/2, N)：
(1) if x ∈ [1, y-N/2], then VA>0, VB<0, and
(2) if x ∈ (y-N/2, N/2], then VA>0, VB>0, and
(3) if x ∈ (N/2, y], then VA<0, VB>0, and
(4) if x ∈ (y, N], then VA<0, VB<0, and
3. as y=N/2：
(1) if x ∈ [1, N/2], then VA>0, VB>0, and
(2) if x ∈ [N/2, N], then VA<0, VB<0, and
After step s 14, x is calculated using following method：
When y ∈ [1, N/2]：
(1) if VB<0, or VB>0 and VA<0, then calculate x using formula 4；
(2) if VB>0 and VA>0, then calculate x using formula 3.
As y ∈ (N/2, N)：
(1) if VA>0, or VA<0 and VB>0, then calculate x using formula 3；
(2) if VA<0 and VB<0, then calculate x using formula 4.
2nd, when N is odd number, after step s 14, x is calculated using following method：
When y ∈ [1, (N-1)/2]：
(1) if VA=0 and VB<0, then x=(N+1)/2；
(2) if VA<0 and VB=0, then x=y+ (N-1)/2；
(3) if VB<0, or VB>0 and VA<0, then calculate x using formula 4；
(4) if VB>0 and VA>0, then calculate x using formula 3.
When y ∈ [(N+1)/2), N) when：
(1) if VA=0 and VB>0, then x=(N+1)/2；
(2) if VA>0 and VB=0, then x=y- (N-1)/2；
(3) if VA>0, or VA<0 and VB>0, then calculate x using formula 4；
(4) if VA<0 and VB<0, then calculate x using formula 3.
Referring to Fig. 7, third embodiment of the invention provides a kind of recognition methods of battery micro-short circuit, including：
S31, there is provided the batteries in parallel connection group 100, wherein, N is even number；
S32, the closed-loop shaped connection conductor 210 is set in the batteries in parallel connection group 100；
S33, a resistance is respectively provided with the closed-loop shaped connection conductor 210 between per the two neighboring battery cell 120
300, a voltage check device 400 in parallel on any one of resistance 300；
S34, in the running of batteries in parallel connection group 100, have one from euqalizing current I in closed-loop shaped connection conductor 210S
By the way that each resistance 300 has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage
VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S35, in the running of batteries in parallel connection group 100, the electricity that the voltage check device 400 detects is gathered in real time
Pressure, when the absolute value for the voltage that the voltage check device 400 detects is more than the voltage pre-set threshold value, judge parallel connection electricity
There occurs micro-short circuit for pond group 100.
Third embodiment of the invention is essentially identical with first embodiment, and its difference is, the battery cell 120
Quantity is even number, therefore, only need on the resistance 300 voltage check device in parallel, no matter which battery
There occurs micro-short circuit, the voltage check device can detect much larger than described from equalizing voltage V monomer 120SShort-circuit voltage.
The voltage check device 400, first voltage detection means 410 and the label of second voltage detection means 420 difference but function
It is identical, it is used to measure the voltage direction and voltage swing on the resistance 300
Referring to Fig. 8, fourth embodiment of the invention provides a kind of recognition methods of battery micro-short circuit, including：
S41, there is provided the batteries in parallel connection group 100, wherein, N ＞ 1；
S42, a non-enclosed connection conductor 240, the non-enclosed connection conductor are set in the batteries in parallel connection group 100
240 have one the 4th tie point 241 with each parallel branch 110, and the non-enclosed connection conductor 240 passes through N number of described
4th tie point 241 electrically connects with the negative or positive electrode of N number of battery cell 120 simultaneously；
S43, it is respectively provided with the non-enclosed connection conductor 240 between per the two neighboring battery cell 120
One resistance 300, a voltage check device 400 in parallel on any one resistance 300；
S44, in the running of batteries in parallel connection group 100, have one from euqalizing current in the non-enclosed connection conductor 240
ISBy the way that each resistance 300 has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from balanced electricity
Press VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S45, in the running of batteries in parallel connection group 100, the electricity that the voltage check device 400 detects is gathered in real time
Pressure, when the absolute value for the voltage that the voltage check device 400 detects is more than the voltage pre-set threshold value, judge parallel connection electricity
There occurs micro-short circuit for pond group 100.
Fourth embodiment of the invention is essentially identical with first embodiment, and its difference is, the connection conductor is non-
Closed rather than closed-loop shaped, and a voltage check device 400 need to be only set on the resistance 300, no matter which institute
Battery cell 120 is stated there occurs micro-short circuit, the voltage check device can be detected much larger than described from equalizing voltage ISIt is short
Road voltage.The non-enclosed connection conductor 240 can be the conductor with uniform resistance.In embodiments of the present invention, the non-envelope
Enclosed connection conductor 240 is a straight wire.
Referring to Fig. 9, fifth embodiment of the invention provides a kind of recognition methods of battery micro-short circuit, including：
S51 a, there is provided battery pack 500 in parallel, it is defeated that the batteries in parallel connection group 500 includes N number of parallel branch 510, the positive pole
Go out end 130 and the cathode output end 140, N number of parallel branch 510 by the cathode output end 130 and is born
140 outside output current of pole output end, each parallel branch 510 include the M battery cells 120 being connected in series, its
In, N ＞ 1, M ＞ 1；
S52, the battery cell 120 that same row is located in N number of parallel branch 510 is formed one group, forms M battery
Monomer group 520, each battery cell group 520 includes N number of battery cell 120, in the batteries in parallel connection group 500
M+1 closed-loop shaped is set to connect conductor 210, the closed-loop shaped connection conductor 210 is arranged alternately with the battery cell group 520,
Each closed-loop shaped connection conductor 210 has one first tie point 211 with each parallel branch 510, and the closed-loop shaped connects
Connect conductor 210 by N number of first tie point 211 simultaneously with N number of battery cell 120 described in a battery cell group
Negative or positive electrode electrical connection；
S53, conductor 210 is connected for each closed-loop shaped, between per two neighboring first tie point 211
One resistance 300 is set, a first voltage detection means 410 and a second voltage in parallel are distinguished on any two resistance 300
Detection means 420；
S54, in the running of batteries in parallel connection group 500, have one from each closed-loop shaped connection conductor 210
Weigh electric current ISFlow through, each resistance 300 has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be certainly
Equalizing voltage VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VS3 times of absolute value
More than；
S55, in the running of batteries in parallel connection group 500, each first voltage detection means 510 is gathered in real time and is examined
The voltage V measuredAThe voltage V detected with each second voltage detection means 520B, when detecting two neighboring described close
In annular link conductor 210, the V of each closed-loop shaped connection conductor 210AAnd VBIn the absolute value of any one be all higher than institute
When stating voltage pre-set threshold value, judge that being connected conductor 210 with the two neighboring closed-loop shaped electrically connects the battery cell simultaneously
There occurs micro-short circuit for group 520.
In step s 51, the batteries in parallel connection group 500 and the batteries in parallel connection group 100 are essentially identical, and its difference exists
In being provided with the battery cells 120 that M is connected in series in each parallel branch 510 of the batteries in parallel connection group 500.
In step S52, the present invention compiles to the M battery cell group 520 successively according to the order being connected in series
Number, respectively No. 1, No. 2 ... No. M-1, M battery cell groups, conductor is connected to the M+1 closed-loop shaped according to same order
210 are numbered, respectively No. 1, No. 2 ... No. M, M+1 closed-loop shapeds connection conductor.
For each battery cell group 520, the battery cell group 520 connects with two adjacent closed-loop shapeds simultaneously
Connect conductor 210 to electrically connect, such as No. 2 battery cell groups shown in Fig. 9, the positive pole of N number of battery cell 120 simultaneously with
No. 2 closed-loop shaped connection conductor electrical connections, the negative pole of N number of battery cell 120 are connected conductor with No. 3 closed-loop shapeds simultaneously and are electrically connected
Connect.The two neighboring battery cell group 520 shares a closed-loop shaped connection conductor 210, such as is closed for No. 2 shown in Fig. 9
Annular link conductor, the negative pole of No. 2 closed-loop shaped connection conductors simultaneously with N number of battery cell 120 of No. 1 battery cell group are electrically connected
Connect, and the positive pole with N number of battery cell 120 of No. 2 battery cell groups electrically connects simultaneously.
For each battery cell group 520, first embodiment and second embodiment are referred to, when the battery cell group
When micro-short circuit occurs for any one battery cell 120 in 520, two closed-loop shapeds being electrically connected respectively with the battery cell group 520
There is short circuit current in connection conductor 210 by the way that in two closed-loop shaped connection conductors 210, each closed-loop shaped connection is led
Two voltage check devices that body 210 is set must have one to be able to detect that much larger than described from equalizing voltage VSShort circuit electricity
Pressure.Such as when micro-short circuit occurs for No. 2 battery cell groups shown in Fig. 9, first be arranged on No. 2 closed-loop shaped connection conductors is electric
There must be one to be able to detect that the short-circuit voltage in pressure detection means 410 and second voltage detection means 420, be arranged on No. 3
Closed-loop shaped connection conductor on first voltage detection means 410 and second voltage detection means 420 in must equally have one can
Detect the short-circuit voltage.Therefore, when detecting short-circuit voltage in connecting conductor 210 in two neighboring closed-loop shaped, i.e.,
Can determine that at the same be connected with the two neighboring closed-loop shaped conductor 210 electrical connection battery cell group 520 there occurs micro-short circuit.
After determining which battery cell group 520 and micro-short circuit occurs, the battery cell group 520 can be also further judged
In which battery cell 120 there occurs micro-short circuit, specific decision method to refer to first embodiment of the invention and second embodiment,
It will not be repeated here.
Sixth embodiment of the invention provides a kind of recognition methods of battery micro-short circuit, including：
S61, there is provided the batteries in parallel connection group 500, wherein, N is even number, M ＞ 1；
S62, the battery cell 120 that same row is located in N number of parallel branch 510 is formed one group, forms M battery
Monomer group 520, each battery cell group 520 includes N number of battery cell 120, in the batteries in parallel connection group 500
M+1 closed-loop shaped is set to connect conductor 210, the closed-loop shaped connection conductor 210 is arranged alternately with the battery cell group 520,
Each closed-loop shaped connection conductor 210 has one first tie point 211 with each parallel branch 510, and the closed-loop shaped connects
Connect conductor 210 by N number of first tie point 211 simultaneously with N number of battery cell 120 described in a battery cell group
Negative or positive electrode electrical connection；
S63, conductor 210 is connected for each closed-loop shaped, between per two neighboring first tie point 211
One resistance 300 is set, a voltage check device 400 in parallel on any one of resistance 300；
S64, in the running of batteries in parallel connection group 500, have one from each closed-loop shaped connection conductor 210
Weigh electric current ISFlow through, each resistance 300 has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be certainly
Equalizing voltage VS, and a voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VS3 times of absolute value
More than；
S65, in the running of batteries in parallel connection group 500, each voltage check device 400 is gathered in real time and is detected
Voltage, when the absolute value of voltage that the voltage check device 400 in two neighboring closed-loop shaped connection conductor 210 detects is equal
During more than the voltage pre-set threshold value, judge that being connected conductor 210 with the two neighboring closed-loop shaped electrically connects the electricity simultaneously
There occurs micro-short circuit for pond monomer group 520.
Sixth embodiment of the invention and the 5th embodiment are essentially identical, and difference is, the battery cell group 520 has
There is even number battery cell 120.Because each battery cell group 520 includes even number battery cell 120, therefore only need to be every
One closed-loop shaped connection conductor 210 on set a voltage check device, you can judge the battery cell group 520 whether there occurs
Micro-short circuit.
When two voltage check devices 400 set on two neighboring closed-loop shaped connection conductor 210 are separately positioned on difference
Parallel branch 510 between when, after determining which battery cell group 520 and micro-short circuit occurs, can also further judge this
There occurs micro-short circuit, specific decision method refers to the present invention second to be implemented which battery cell 120 in battery cell group 520
Example, will not be repeated here.
Of the invention first arranges with the connection conductor from proportionality action to sixth embodiment in batteries in parallel connection group, and
This, which has, sets resistance and voltage check device from the connection conductor of proportionality action, and the resistance has one and the batteries in parallel connection group
From corresponding to euqalizing current from equalizing voltage, by compare voltage that the voltage check device detects with this from the big of equalizing voltage
It is small, it is possible to identify whether there occurs micro-short circuit for the batteries in parallel connection group.The present invention furthermore provides a kind of judgement parallel connection
The method of micro-short circuit occurs for which battery cell in battery pack.The recognition methods of battery micro-short circuit provided by the invention is for using
The raising of the security of the product of batteries in parallel connection group has key effect.
In addition, those skilled in the art can also do other changes in spirit of the invention, these are according to present invention spirit
The change done, it should all be included in scope of the present invention.
Claims (10)
1. a kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is defeated that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and a negative pole
Go out end, N number of parallel branch by the cathode output end and the outside output current of cathode output end, it is each it is described simultaneously
Connection branch road includes a battery cell, wherein, N ＞ 1；
S2, set in the batteries in parallel connection group closed-loop shaped connect conductor, the closed-loop shaped connect conductor with it is each described in parallel
Branch road has a tie point, and the closed-loop shaped connects conductor and passes through N number of tie point while the positive pole with N number of battery cell
Or negative pole electrically connects and forms an annular channels；
S3, a resistance is respectively provided with the closed-loop shaped connection conductor between per the two neighboring battery cell, in any two
A first voltage detection means and a second voltage detection means in parallel are distinguished on the resistance；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in closed-loop shaped connection conductorSBy Mei Yisuo
Stating resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and set a voltage
Pre-set threshold value, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage V that the first voltage detection means detects is gathered in real timeAAnd institute
State the voltage V that second voltage detection means detectsB, when detecting VAAnd VBIn the absolute value of any one be more than the voltage
During pre-set threshold value, judge that there occurs micro-short circuit for the batteries in parallel connection group.
2. the recognition methods of battery micro-short circuit as claimed in claim 1, it is characterised in that connect conductor in the closed-loop shaped
On, using the first voltage detection means as starting point, N number of battery cell is compiled successively according to clock-wise order
Number, respectively numbering be 1,2N-1, N battery cells, the second voltage detection means is arranged on No. y and (y+1)
Between number battery cell, and y ∈ [1, N), and provide that the clockwise direction of the parallel circuit is current reference direction.
3. the recognition methods of battery micro-short circuit as claimed in claim 2, it is characterised in that the closed-loop shaped connection conductor is simultaneously
Electrically connected with the positive pole of N number of battery cell, set the battery cell that micro-short circuit occurs as x battery cells, determining
After micro-short circuit occurs for the batteries in parallel connection group, the numbering that micro-short circuit battery cell occurs further is judged using following method：
(1) when N is even number, during y ∈ [1, N/2]:
If VB>0, or VB<0 and VA<0, then utilizeCalculate x；
If VB<0 and VA>0, then utilizeCalculate x；
(2) when N is even number, during y ∈ (N/2, N)：
If VA>0, or VA<0 and VB<0, then utilizeCalculate x；
If VA<0 and VB>0, then utilizeCalculate x；
(3) when N is odd number, during y ∈ [1, (N-1)/2]：
If VA=0 and VB>0, then x=(N+1)/2；
If VA<0 and VB=0, then x=y+ (N-1)/2；
If VB>0, or VB<0 and VA<0, then utilizeCalculate x；
If VB<0 and VA>0, then utilizeCalculate x；
(4) when N is odd number, y ∈ [(N+1)/2), N) when：
If VA=0 and VB<0, then x=(N+1)/2；
If VA>0 and VB=0, then x=y- (N-1)/2；
If VA>0, or VA<0 and VB<0, then utilizeCalculate x；
If VA<0 and VB>0, then utilizeCalculate x.
4. the recognition methods of battery micro-short circuit as claimed in claim 2, it is characterised in that the closed-loop shaped connection conductor is simultaneously
Electrically connected with the negative pole of N number of battery cell, set the battery cell that micro-short circuit occurs as x battery cells, determining
After micro-short circuit occurs for the batteries in parallel connection group, the volume that micro-short circuit battery cell occurs further is judged using following method
Number：
(1) when N is even number, during y ∈ [1, N/2]:
If VB<0, or VB>0 and VA>0, then utilizeCalculate x；
If VB>0 and VA<0, then utilizeCalculate x；
(2) when N is even number, during y ∈ (N/2, N)：
If VA<0, or VA>0 and VB>0, then utilizeCalculate x；
If VA>0 and VB<0, then utilizeCalculate x；
(3) when N is odd number, during y ∈ [1, (N-1)/2]：
If VA=0 and VB<0, then x=(N+1)/2；
If VA>0 and VB=0, then x=y+ (N-1)/2；
If VB<0, or VB>0 and VA>0, then utilizeCalculate x；
If VB>0 and VA<0, then utilizeCalculate x；
(4) when N is odd number, y ∈ [(N+1)/2), N) when：
If VA=0 and VB>0, then x=(N+1)/2；
If VA<0 and VB=0, then x=y- (N-1)/2；
If VA<0, or VA>0 and VB>0, then utilizeCalculate x；
If VA>0 and VB<0, then utilizeCalculate x.
5. the recognition methods of battery micro-short circuit as claimed in claim 2, it is characterised in that set in the batteries in parallel connection group
Two closed-loop shaped connection conductors, positive pole of the closed-loop shaped connection conductor simultaneously with N number of battery cell are electrically connected
Connect, another described closed-loop shaped connection conductor electrically connects with the negative pole of N number of battery cell simultaneously；Two closed-loop shaped connections
The resistance is provided with conductor, and between every two neighboring battery cell, the resistance sets two closed-loop shapeds
Connect on one in conductor；The battery cell that micro-short circuit occurs is set as x battery cells, is determining the batteries in parallel connection group
After generation micro-short circuit, the numbering that micro-short circuit battery cell occurs further is judged using following method：
(1) when N is even number, during y ∈ [1, N/2]:
If VB<0, or VB>0 and VA<0, then utilizeCalculate x；
If VB>0 and VA>0, then utilizeCalculate x；
(2) when N is even number, during y ∈ (N/2, N)：
If VA>0, or VA<0 and VB>0, then utilizeCalculate x；
If VA<0 and VB<0, then utilizeCalculate x；
(3) when N is odd number, during y ∈ [1, (N-1)/2]：
If VA=0 and VB<0, then x=(N+1)/2；
If VA<0 and VB=0, then x=y+ (N-1)/2；
If VB<0, or VB>0 and VA<0, then utilizeCalculate x；
If VB>0 and VA>0, then utilizeCalculate x；
(4) when N is odd number, y ∈ [(N+1)/2), N) when：
If VA=0 and VB>0, then x=(N+1)/2；
If VA>0 and VB=0, then x=y- (N-1)/2；
If VA>0, or VA<0 and VB>0, then utilizeCalculate x；
If VA<0 and VB<0, then utilizeCalculate x.
6. the recognition methods of battery micro-short circuit as claimed in claim 1, it is characterised in that the closed-loop shaped connection conductor is tool
There are the conductor of uniform resistance, the resistance all same of the resistance.
7. a kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is defeated that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and a negative pole
Go out end, N number of parallel branch by the cathode output end and the outside output current of cathode output end, it is each it is described simultaneously
Connection branch road includes a battery cell, wherein, N ＞ 1；
S2, set in the batteries in parallel connection group closed-loop shaped connect conductor, the closed-loop shaped connect conductor with it is each described in parallel
Branch road has a tie point, and the closed-loop shaped connects conductor and passes through N number of tie point while the positive pole with N number of battery cell
Or negative pole electrically connects and forms an annular channels；
S3, a resistance is respectively provided with the closed-loop shaped connection conductor between per the two neighboring battery cell, at any one
The voltage check device of resistor in parallel one；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in closed-loop shaped connection conductorSBy Mei Yisuo
Stating resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and set a voltage
Pre-set threshold value, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that the voltage check device detects is gathered in real time, when the voltage
When the absolute value for the voltage that detection means detects is more than the voltage pre-set threshold value, judge that there occurs micro- short for the batteries in parallel connection group
Road.
8. a kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is defeated that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and a negative pole
Go out end, N number of parallel branch by the cathode output end and the outside output current of cathode output end, it is each it is described simultaneously
Connection branch road includes a battery cell, wherein, N ＞ 1；
S2, in the batteries in parallel connection group set a non-enclosed connection conductor, this it is non-enclosed connection conductor with it is each described
Parallel branch has a tie point, this it is non-enclosed connection conductor by N number of tie point simultaneously with N number of battery cell
Negative or positive electrode electrical connection；
S3, a resistance is respectively provided with the non-enclosed connection conductor between per the two neighboring battery cell, it is in office
One voltage check device of resistor in parallel one of meaning；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in the non-enclosed connection conductorSBy each
The resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and set an electricity
Pre-set threshold value is pressed, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that the voltage check device detects is gathered in real time, when the voltage
When the absolute value for the voltage that detection means detects is more than the voltage pre-set threshold value, judge that there occurs micro- short for the batteries in parallel connection group
Road.
9. a kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is defeated that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and a negative pole
Go out end, N number of parallel branch by the cathode output end and the outside output current of cathode output end, it is each it is described simultaneously
Connection branch road includes the M battery cells being connected in series, wherein, N ＞ 1, M ＞ 1；
S2, the battery cell that same row is located in N number of parallel branch is formed one group, forms M battery cell group, it is each
The battery cell group includes N number of battery cell, sets M+1 closed-loop shaped to connect in the batteries in parallel connection group and leads
Body, the closed-loop shaped connection conductor are arranged alternately with the battery cell group, each closed-loop shaped connection conductor and each institute
Stating parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with a battery list
The negative or positive electrode electrical connection of N number of battery cell described in body group；
S3, conductor is connected for each closed-loop shaped, a resistance is respectively provided between per the two neighboring tie point, it is in office
A first voltage detection means and a second voltage detection means in parallel are distinguished on two resistance of meaning；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in each closed-loop shaped connection conductorSStream
Cross, each resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and
A voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage V that each first voltage detection means detects is gathered in real timeA
The voltage V detected with each second voltage detection meansB, when detecting two neighboring closed-loop shaped connection conductor
In, the V of each closed-loop shaped connection conductorAAnd VBIn the absolute value of any one when being all higher than the voltage pre-set threshold value, sentence
Being connected the conductor electrical connection battery cell group with the two neighboring closed-loop shaped simultaneously calmly, there occurs micro-short circuit.
10. a kind of recognition methods of battery micro-short circuit, including：
S1 a, there is provided battery pack in parallel, it is defeated that the batteries in parallel connection group includes N number of parallel branch, a cathode output end and a negative pole
Go out end, N number of parallel branch by the cathode output end and the outside output current of cathode output end, it is each it is described simultaneously
Connection branch road includes the battery cells that M is connected in series, wherein, N is even number, M ＞ 1；
S2, the battery cell that same row is located in N number of parallel branch is formed one group, forms M battery cell group, it is each
The battery cell group includes N number of battery cell, sets M+1 closed-loop shaped to connect in the batteries in parallel connection group and leads
Body, the closed-loop shaped connection conductor are arranged alternately with the battery cell group, each closed-loop shaped connection conductor and each institute
Stating parallel branch has a tie point, the closed-loop shaped connect conductor by N number of tie point simultaneously with a battery list
The negative or positive electrode electrical connection of N number of battery cell described in body group；
S3, conductor is connected for each closed-loop shaped, a resistance is respectively provided between per the two neighboring tie point, it is in office
One voltage check device of resistor in parallel one of meaning；
S4, in the batteries in parallel connection group running, have one from euqalizing current I in each closed-loop shaped connection conductorSStream
Cross, each resistance has one with being somebody's turn to do from euqalizing current ISIt is corresponding from equalizing voltage VS, detection should be from equalizing voltage VS, and
A voltage pre-set threshold value is set, the voltage pre-set threshold value is to be described from equalizing voltage VSMore than 3 times of absolute value；
S5, in the batteries in parallel connection group running, the voltage that each voltage check device detects is gathered in real time, works as phase
The absolute value of voltage that voltage check device in adjacent two closed-loop shaped connection conductors detects is all higher than the voltage and preset
During threshold values, judgement is connected the conductor electrical connection battery cell group with the two neighboring closed-loop shaped simultaneously, and there occurs micro- short
Road.
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| CN109080468B (en) * | 2018-06-27 | 2021-06-01 | 中航锂电（洛阳）有限公司 | Early warning method and system for battery module with overcharge protection device |
| CN109901004B (en) * | 2019-02-20 | 2021-02-23 | 北京航空航天大学 | Method and system for detecting short circuit in vehicle-mounted power battery |
| CN110764017B (en) * | 2019-10-10 | 2022-04-12 | 复旦大学 | Detection method for quickly determining short circuit of electronic device of parallel circuit |
| CN113009378B (en) * | 2021-03-08 | 2022-03-29 | 经纬恒润(天津)研究开发有限公司 | Battery micro short circuit detection method and device |
| CN115684975A (en) * | 2022-12-28 | 2023-02-03 | 湖北工业大学 | Method and system for quantizing battery micro short circuit based on balanced electric quantity |
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