CN210156951U - Equalizing charging device for series lithium battery pack - Google Patents
Equalizing charging device for series lithium battery pack Download PDFInfo
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- CN210156951U CN210156951U CN201921163071.8U CN201921163071U CN210156951U CN 210156951 U CN210156951 U CN 210156951U CN 201921163071 U CN201921163071 U CN 201921163071U CN 210156951 U CN210156951 U CN 210156951U
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 67
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 23
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 3
- 240000007320 Pinus strobus Species 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The utility model relates to a series lithium battery pack equalizing charging device, which comprises a main charger, an auxiliary charger, a temperature detection module, a voltage detection module, a control module and a state output module, wherein the auxiliary charger, the temperature detection module and the voltage detection module respectively consist of auxiliary charging units, temperature detection units and voltage detection units, the number of the auxiliary charging units is the same as that of single batteries in a lithium ion battery pack, the main charger is connected with the lithium ion battery pack in series, each auxiliary charger unit, each temperature detection unit and each voltage detection unit are respectively connected with each single battery in parallel, the control module is respectively connected with the auxiliary charger, the temperature detection module and the voltage detection module to detect the temperature and the voltage of each single battery, and the output end of the control module is connected with the state output module. The device is favorable for equalizing charge of the battery pack, and improves the effective capacity and the service life of the battery pack.
Description
Technical Field
The utility model relates to a lithium ion battery technical field that charges, concretely relates to series lithium cell group equalizing charge device.
Background
The lithium ion battery has the advantages of large specific energy, small volume, no pollution and the like, and is widely applied to a plurality of important industries such as electric automobiles, mobile equipment, emergency power supplies and the like. Due to the voltage and capacity limitations of single lithium batteries, in practical use, a battery pack is usually formed by connecting a plurality of single lithium batteries in series. Due to differences in performance between the individual cells that make up the battery pack, the performance of the individual cells can affect the performance of the overall lithium ion battery pack. Due to the reduction of the capacity of the individual single battery, the capacity of the battery pack is reduced, and the service life and the service capacity of the battery pack are reduced. In order to reduce the imbalance among the single batteries, the battery pack needs to be charged in a balanced manner in the charging process.
At present, the common battery pack equalizing charge schemes are mainly divided into two types, one is an energy dissipation type, and the other is an energy feedback type. The energy dissipation type is to release the energy of the single battery with higher voltage through the parallel branch, so as to achieve the balance of the energy of each single battery. The energy feedback type is that energy of a single battery with more energy is fed back to a battery pack or a single battery with lower energy in the battery pack through an energy transfer device. The energy dissipation type equalizing charge has disadvantages in that a large amount of energy is consumed, the battery charging efficiency is lowered, and more heat is emitted. The disadvantage of the energy feedback type equalizing charge is that many switching elements and energy storage elements are needed when transferring energy, resulting in a complex control circuit and difficult practical application.
Disclosure of Invention
An object of the utility model is to provide a series lithium cell group equalizing charge device, the device do benefit to and carry out equalizing charge to the group battery, improve the effective capacity and the life of group battery.
In order to achieve the above purpose, the technical scheme of the utility model is that: an equalizing charging device of a series lithium battery pack comprises a main charger, an auxiliary charger, a temperature detection module, a voltage detection module, a control module and a state output module, the auxiliary charger, the temperature detection module and the voltage detection module are respectively composed of auxiliary charging units, temperature detection units and voltage detection units which are the same as the number of the single batteries in the lithium ion battery pack to be charged, the main charger is connected with the lithium ion battery pack in series, each auxiliary charger unit, the temperature detection unit and the voltage detection unit are respectively connected with each single battery of the lithium ion battery pack in parallel, the control module is respectively connected with the auxiliary charger, the temperature detection module and the voltage detection module to detect the temperature and the voltage of each single battery, and charging the corresponding single batteries by gating the plurality of auxiliary charging units, wherein the output end of the control module is connected with the state output module.
Furthermore, the auxiliary charger is provided with a charging shift gating circuit, the charging shift gating circuit comprises a D trigger arranged on each auxiliary charging unit and two pulse timing signal control lines of Clock and Din, and the two control lines of Clock and Din are connected with the control module to control the on-off of each auxiliary charging unit through multi-bit gating of the control module so as to supplement charging for the corresponding single battery.
Furthermore, the voltage detection module is provided with a voltage shift gating circuit, the voltage shift gating circuit comprises a D trigger arranged on each voltage detection unit and two pulse timing signal control lines, namely Clock and Din, the two control lines are connected with the control module so as to sequentially switch on each voltage detection unit through the control module and sequentially detect the voltage of the corresponding single battery.
Furthermore, the temperature detection module is provided with a temperature shift gating circuit, the temperature shift gating circuit comprises a D trigger arranged on each temperature detection unit and two pulse timing signal control lines, namely Clock and Din, the two control lines are connected with the control module so as to sequentially switch on each temperature detection unit through the control module and sequentially detect the temperature of the corresponding single battery.
Furthermore, a chip for storing the charging time and charging temperature data of the lithium ion battery pack and each single battery is arranged on the control module.
Furthermore, the state output module is provided with a display screen to display the charging time and charging temperature data of the lithium ion battery pack and each single battery.
Compared with the prior art, the beneficial effects of the utility model are that: the mode that adopts the cooperation of main and auxiliary charger to charge realizes the equalizing charge of lithium ion battery group, adopt main charger to charge to whole group battery promptly, then through the voltage that detects each battery, adopt auxiliary charger to charge for corresponding battery supplyes, the inconsistent problem of each battery in the group battery has been solved, the equalizing charge of group battery has been realized, the effective capacity and the life of group battery have been improved, charging efficiency has been improved, charging time and energy loss have been reduced, simultaneously through detecting battery temperature, group battery work and charging safety have been improved. In addition, the device has the advantages of simple structure, easy realization, strong practicability and wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a charge shift gate circuit according to an embodiment of the present invention.
In the figure, 1-a temperature detection unit, 2-a voltage detection unit, 3-an auxiliary charging unit, 4-a main charger, 5-a lithium ion battery pack to be charged, 6-a control module and 7-a state output module.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the equalizing charge device of the series lithium battery pack of the present invention. As shown in fig. 1, the utility model discloses a main charger 4, vice charger, temperature detection module, voltage detection module, control module 6 and state output module 7, vice charger, temperature detection module, voltage detection module are respectively by with treat that the lithium ion battery group 5 that charges in the same vice charging unit 3 of monomer battery quantity, temperature detecting element 1, voltage detecting element 2 constitute. The main charger 4 is connected with the lithium ion battery pack 5 in series, each auxiliary charger unit 3, the temperature detection unit 1 and the voltage detection unit 2 are respectively connected with each single battery of the lithium ion battery pack 5 in parallel, the control module 6 is respectively connected with the auxiliary charger, the temperature detection module and the voltage detection module to detect the temperature and the voltage of each single battery and charge the corresponding single battery by gating a plurality of auxiliary charging units, and the output end of the control module 6 is connected with the state output module 7.
The main charger 4 is a constant current output power supply, and outputs constant current all the time, so that the charging requirement of the lithium ion battery pack is met. During charging, the main charger 4 provides a constant charging current to the charging circuit when the voltage of each cell has not yet reached its maximum charging voltage. When the cell voltage has been charged to its maximum charging voltage, the main charger 4 is turned off and no current is supplied to the charging circuit.
And each temperature detection unit 1 of the temperature detection module is correspondingly connected to the corresponding single battery and used for collecting the temperature of each single battery. If the control module 6 finds that the temperature is abnormal, the control module gives an alarm through the state output module 7. In this embodiment, the temperature acquisition is achieved as follows: the voltage detection module is provided with a temperature shift gating circuit, the temperature shift gating circuit comprises a D trigger arranged on each temperature detection unit, and two pulse timing signal control lines of Clock and Din, the two control lines of Clock and Din are connected with the control module so as to sequentially switch on each temperature detection unit through the control module 6 and sequentially detect the temperature of the corresponding single battery.
And each voltage detection unit 2 of the voltage detection module is correspondingly connected to two ends of the corresponding single battery and used for collecting the voltage of each single battery. If the control module 6 finds that the voltage is abnormal, the control module gives an alarm through the state output module 7. In this embodiment, the voltage acquisition is implemented as follows: the voltage detection module is provided with a voltage shift gating circuit, the voltage shift gating circuit comprises a D trigger arranged on each voltage detection unit and two pulse timing signal control lines of Clock and Din, and the two control lines of Clock and Din are connected with the control module so as to sequentially conduct each voltage detection unit through the control module 6 and sequentially detect the voltage of the corresponding single battery. The control method comprises the following steps: setting Din to be high level, giving a Clock signal, conducting S1, shifting and gating the first voltage detection unit, keeping Din at low level, giving the Clock signal, shifting and gating the next voltage detection unit, and so on, namely acquiring the voltage of each single battery in sequence.
In the charging process, although the voltage and the temperature are collected in a circulating detection mode, the voltage and the temperature of the battery cannot change suddenly, the circulating detection period is enough to meet the function of the device, and the voltage and the temperature of each single battery are detected at near real time.
Each auxiliary charging unit of the auxiliary charger is correspondingly connected to two ends of a corresponding single battery, and the control module 6 gates the corresponding auxiliary charging unit according to the voltage of each single battery collected by the voltage detection module and aiming at the single battery with lower voltage, and continues to perform supplementary charging on the single battery which is not fully charged. In the present embodiment, a plurality of sub-charging units are gated as follows: the auxiliary charger is provided with a charging shift gating circuit, the charging shift gating circuit comprises a D trigger arranged on each auxiliary charging unit and two pulse timing signal control lines of Clock and Din, and the two control lines of Clock and Din are connected with the control module to control the on-off of each auxiliary charging unit through multi-bit gating of the control module 6 so as to supplement charging for the corresponding single battery. The control method comprises the following steps: if all strobes, then Din is always high, if only the first and third strobes, then Din is set high before the first and third Clock outputs from the last, and Din is set low before the other Clock outputs. And transmitting a control signal to the auxiliary charging unit needing to be conducted through the outputs of Clock and Din, so that the multiple auxiliary charging units are simultaneously gated.
As shown in fig. 2, the pulse input terminal C of each flip-flop in the charge shift gate circuit is connected to the control module 6. The signal input terminal D of the flip-flop D1 of the first gating circuit is connected to the control module 6, and the output terminal Q is connected to the signal input terminal D of the flip-flop D2 of the next gating circuit. And are thus connected in sequence. And the output end Q of each trigger is not connected to the corresponding group of switches S1-Sn, and the on-off of each switch is controlled, so that the gating of each single battery is controlled.
In this embodiment, the control module 6 is provided with a chip for storing the charging time and charging temperature data of the lithium ion battery pack and each single battery. The state output module 7 is provided with a display screen to display the charging time and charging temperature data of the lithium ion battery pack and each single battery. The charging state, the charging time and the charging temperature of each single battery can be conveniently read through the state output module 7, and the historical charging time, the average charging time of the battery pack, the charging temperature of each single battery and the average charging temperature of the battery pack of each single battery can be displayed, and abnormal alarm is performed. For an abnormal battery with a charging time much longer than that of other single batteries or a battery with an abnormal charging temperature, the abnormal battery can be replaced under the condition of allowing replacement, so that the capacity and the service life of the battery pack are improved.
Above is the utility model discloses a preferred embodiment, all rely on the utility model discloses the change that technical scheme made, produced functional action does not surpass the utility model discloses during technical scheme's scope, all belong to the utility model discloses a protection scope.
Claims (6)
1. An equalizing charge device of a series lithium battery pack is characterized by comprising a main charger, an auxiliary charger, a temperature detection module, a voltage detection module, a control module and a state output module, the auxiliary charger, the temperature detection module and the voltage detection module are respectively composed of auxiliary charging units, temperature detection units and voltage detection units which are the same as the number of the single batteries in the lithium ion battery pack to be charged, the main charger is connected with the lithium ion battery pack in series, each auxiliary charger unit, the temperature detection unit and the voltage detection unit are respectively connected with each single battery of the lithium ion battery pack in parallel, the control module is respectively connected with the auxiliary charger, the temperature detection module and the voltage detection module to detect the temperature and the voltage of each single battery, and charging the corresponding single batteries by gating the plurality of auxiliary charging units, wherein the output end of the control module is connected with the state output module.
2. The device of claim 1, wherein the secondary charger is provided with a charge shift gate circuit, the charge shift gate circuit comprises a D flip-flop and two Clock and Din pulse timing signal control lines, the D flip-flops and the two Clock and Din pulse timing signal control lines are arranged on the secondary charging units, and the two Clock and Din control lines are connected to the control module to control the on/off of the secondary charging units through multi-bit gating of the control module, so as to charge the corresponding single batteries additionally.
3. The device of claim 1, wherein the voltage detection module is provided with a voltage shift gating circuit, the voltage shift gating circuit comprises a D flip-flop and two Clock and Din pulse timing signal control lines, the D flip-flop and the two Clock and Din pulse timing signal control lines are disposed on each voltage detection unit, and the two Clock and Din control lines are connected to the control module, so that the control module sequentially turns on each voltage detection unit to sequentially detect the voltage of the corresponding single battery.
4. The device according to claim 1, wherein the temperature detection module is provided with a temperature shift gate circuit, the temperature shift gate circuit comprises a D flip-flop and two Clock and Din pulse timing signal control lines, the D flip-flop and the two Clock and Din pulse timing signal control lines are arranged on each temperature detection unit, and the two Clock and Din control lines are connected to the control module, so that the control module sequentially switches on each temperature detection unit to sequentially detect the temperature of the corresponding single battery.
5. The device for equalizing charge of a series lithium battery pack according to claim 1, wherein a chip for storing the charge time and charge temperature data of the lithium ion battery pack and the individual batteries is disposed on the control module.
6. The device of claim 1, wherein the status output module is provided with a display screen for displaying the charging time and charging temperature data of the lithium ion battery pack and the single batteries.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921163071.8U CN210156951U (en) | 2019-07-23 | 2019-07-23 | Equalizing charging device for series lithium battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921163071.8U CN210156951U (en) | 2019-07-23 | 2019-07-23 | Equalizing charging device for series lithium battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210156951U true CN210156951U (en) | 2020-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921163071.8U Expired - Fee Related CN210156951U (en) | 2019-07-23 | 2019-07-23 | Equalizing charging device for series lithium battery pack |
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| Country | Link |
|---|---|
| CN (1) | CN210156951U (en) |
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2019
- 2019-07-23 CN CN201921163071.8U patent/CN210156951U/en not_active Expired - Fee Related
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Granted publication date: 20200317 |
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