CN105425141B - The detecting fault device and method for detecting of electronic stopping switch - Google Patents
The detecting fault device and method for detecting of electronic stopping switch Download PDFInfo
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- CN105425141B CN105425141B CN201410459394.7A CN201410459394A CN105425141B CN 105425141 B CN105425141 B CN 105425141B CN 201410459394 A CN201410459394 A CN 201410459394A CN 105425141 B CN105425141 B CN 105425141B
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Abstract
A kind of the detecting fault device and method for detecting of electronic stopping switch, the detecting fault device include a power supply unit, a power switch, a detecting unit and a control unit；The detecting unit has one first feedback circuit and one second feedback circuit, first feedback circuit has one first feedback voltage, second feedback circuit has one second feedback voltage, which judges whether the power switch is abnormal using the voltage difference between first feedback voltage and the second feedback voltage.
Description
Technical field
The present invention relates to a kind of detecting fault device and method for detecting, the failure especially in regard to a kind of electronic stopping switch is detectd
Survey device and method for detecting.
Background technique
Currently, electric vehicle be mounted with rotation axle shaft needed for motor (such as permanent magnet brushless motor) and
Receive the power supply of battery to drive the power supply mechanism of the motor.The power supply device then can be in electric vehicle with inertia
When driving or gug when driving when by the motor used as generator, whereby with its generate electricity electric power give
The regeneration function of battery progress reverse charging.
In addition, the protection circuit of the power supply device of electric vehicle is that device is prevented to be loaded in electric vehicle power sources dress using overload
It sets, the voltage status of power device of electric vehicle is supervised by the relay switch and control device of overload preventer
Control.
However, be mechanical structure since above-mentioned overload prevents the relay switch (Relay) of device, it can after long-time service
Closed circuit accident can be made to become to open a way because of contact carbon distribution, or because contact contact resistance is excessive, so that electric current is out-of-date
High temperature welding is generated, so that the relay switch actuation is abnormal.In the prior art, general settling mode is in the relay
The auxiliary contact that switch is interlocked plus one group and the relay switch main contact, to carry out the judgement of actuation exception, but in this way
The circuit design of the relay switch can be made to become complicated, the occupied space of circuit increases and leads to cost increase.
It is existing to solve it is therefore desirable to provide a kind of detecting fault device of the electronic stopping switch of improvement and method for detecting
The problems of technology.
Summary of the invention
The main purpose of the present invention is to provide a kind of detecting fault devices of electronic stopping switch, utilize the first feedback
The design of (feedback) circuit and the second feedback circuit, the further occupied space of reduction circuit.
Another object of the present invention is to provide a kind of method for detecting fault of electronic stopping switch, utilize the first feedback electricity
The design of road and the second feedback circuit is further simplified the configuration of circuit element, to reduce cost.
In order to achieve the above object, the present invention provides a kind of detecting fault device of electronic stopping switch, comprising a power supply unit,
One power switch, a detecting unit and a control unit；The power supply unit has carload battery；Power switch electrical connection should
Vehicle battery；The detecting unit has one first feedback circuit and one second feedback circuit, first feedback circuit and second time
It awards circuit and is electrically connected the power switch both ends, wherein first feedback circuit has one first feedback voltage, this is second time
Circuit is awarded with one second feedback voltage；To open and close the power switch, which utilizes this first time the control unit
The voltage difference between voltage and the second feedback voltage is awarded to judge whether the power switch is abnormal.
In one embodiment of this invention, which has a first resistor and a second resistance, this first
The first feedback voltage between resistance and second resistance is to feedback (feedback) to the control unit.
In one embodiment of this invention, which has a 3rd resistor and one the 4th resistance, the third
The second feedback voltage between resistance and the 4th resistance is to be fed back to the control unit.
In one embodiment of this invention, the detecting fault device of the electronic stopping switch additionally comprises a preliminary filling unit, comprising:
One preliminary filling resistance is electrically connected one end of second feedback circuit and power switch；And preliminary filling switchs, it is electrically connected the precharge
The other end of resistance, the first feedback circuit and the power switch.
In one embodiment of this invention, which also has a lock on switch, is electrically connected the vehicle battery and
One feedback circuit.
In one embodiment of this invention, which is a relay.
In order to achieve the above object, the present invention provides a kind of method for detecting fault of electronic stopping switch, comprising the steps of: a starting
Step, to open a lock on switch of a power supply unit；And one first judgment step, compare one first using a control unit
Whether feedback voltage and one second feedback voltage are identical, and the control unit judges the power switch for short-circuit exception if they are the same.
In one embodiment of this invention, the method for detecting fault of the electronic stopping switch additionally comprises step: a short circuit step
Suddenly, after first judgment step, a preliminary filling switchs is made to form short circuit；One second judgment step, if second feedback voltage
It is 90% or more of the first feedback voltage, then the power switch is made to form short circuit；One open circuit step, opens preliminary filling switchs formation
Road；And a third judgment step, compare first feedback voltage using the control unit and whether the second feedback voltage is identical, if
The different control units judge that the power switch is abnormal for open circuit.
In one embodiment of this invention, the method for detecting fault of the electronic stopping switch additionally comprises a waiting step, in this
After second judgment step, wait 2 seconds.
As described above, detecting the voltage of the power supply unit using first feedback circuit is added, then second feedback of arranging in pairs or groups
The driving end voltage of the circuit detecting control unit judges whether the power switch goes out by the pressure difference variation of the power switch
Existing short circuit is abnormal or open circuit is abnormal, reaches the occupied space of reduction circuit whereby and simplifies the configuration of circuit element and reduce into
This effect.
Detailed description of the invention
Fig. 1 is the circuit diagram of the detecting fault device of electronic stopping switch according to an embodiment of the invention；And
Fig. 2 is the flow chart of the method for detecting fault of electronic stopping switch according to an embodiment of the invention.
Specific embodiment
In order to which above and other purpose of the invention, feature, advantage can be clearer and more comprehensible, it is excellent that spy is hereafter lifted into the present invention
Embodiment is selected, and cooperates appended attached drawing, is described in detail below.Furthermore the direction term that the present invention is previously mentioned, such as above and below,
Top, bottom, front, rear, left and right, inside and outside, side, surrounding, center, level, transverse direction, vertically, longitudinally, axial direction, radial direction, top layer or
Lowest level etc. is only the direction with reference to attached drawing.Therefore, the direction term used is to illustrate and understand the present invention, Er Feiyong
To limit the present invention.
It please refers to shown in Fig. 1, the detecting fault device 100 of the electronic stopping switch of one embodiment of the invention, to as electricity
Motor Car Institute loads the detecting fault of the switch of power supply device, which opens comprising a power supply unit 2, a power
Close 3, one detecting unit 4, a control unit 5, a preliminary filling unit 6, a power capacity C, a transistor module 7 and a dead resistance
R5.The present invention will be closed in the detail structure for each element of detecting fault device 100 that the electronic stopping switch is detailed below, assembling
System and its operation principles.
With continued reference to shown in Fig. 1, which has carload battery 21 and a lock on switch (Main Key) 22,
And the lock on switch 22 is electrically connected the vehicle battery 21, in the present embodiment, which is lithium battery, and user can lead to
It crosses electronic car key and opens or closes the lock on switch 22, the vehicle battery 21 is made to start electricity needed for providing electric vehicle.
With continued reference to shown in Fig. 1, which is electrically connected the vehicle battery 21 of the power supply unit 2, in the present embodiment
In, which is a relay (Main Relay), to unlatch and close to the electricity supply of electric vehicle.
With continued reference to shown in Fig. 1, which has one first feedback circuit 41 and one second feedback circuit 42；It should
First feedback circuit 41 and the second feedback circuit 42 are electrically connected the both ends of the power switch 3, wherein first feedback circuit
41 have an a first resistor R1 and second resistance R2, have one first feedback electricity between first resistor R1 and second resistance R2
Pressure, and first feedback voltage is to be fed back to the control unit 5；Second feedback circuit 42 has a 3rd resistor R3 and one
4th resistance R4 has one second feedback voltage between 3rd resistor R3 and the 4th resistance R4, and second feedback voltage is used
To be fed back to the control unit 5.
With continued reference to shown in Fig. 1, which is to open and close the power switch 3, in the present embodiment, the control
Unit 5 is a microcontroller (Microcontroller Unit, MCU), and the control unit 5 is to utilize first feedback voltage
And the second voltage difference between feedback voltage is to judge whether the power switch 3 is that short-circuit abnormal or open circuit is abnormal.
With continued reference to shown in Fig. 1, which has a preliminary filling resistance 61 and a preliminary filling switchs 62, the preliminary filling resistance
61 are electrically connected one end of the 3rd resistor R3 of second feedback circuit 42 and power switch 3；It is pre- that the preliminary filling switchs 62 are electrically connected this
The first resistor R1 of charging the 61, first feedback circuit 41 of resistance and the other end of the power switch 3.
With continued reference to shown in Fig. 1, power capacity C, the transistor module 7 and dead resistance R5 are this second time in parallel simultaneously
Circuit 42 is awarded, in the present embodiment, which is metal-oxide-semifield-effect electric crystal module (MOSFET Module), to make
To drive load circuit.
With continued reference to shown in Fig. 1, according to above-mentioned structure, the abnormal judgement of 3 short circuit of power switch is as follows: for example, when should
Vehicle battery 21 disconnects (key-off) and is formed when being not turned on, which can be released (release), at this time the control
Dead resistance in unit 5 can consume the charge of power capacity C, and gradually decrease the voltage of power capacity C.When this is whole
Vehicle battery 21 short-circuit (Key-on) and when forming conducting, which is waken up (Wake up) and the preliminary filling switchs 62 not yet
Before conducting, if the voltage of power capacity C is identical with the voltage of the vehicle battery 21, it can be determined that the vehicle battery 21 is short
Road is abnormal.
With continued reference to shown in Fig. 1, the power switch 3 abnormal judgement of opening a way is as follows: likewise, when the vehicle battery 21 is short-circuit
And when forming conducting, which is waken up and the preliminary filling switchs 62 are connected and after completing preliminary filling (Precharge) program,
The power switch 3 is connected, and discharges the preliminary filling switchs 62 simultaneously, if the driving end voltage of the control unit 5 is gradually reduced,
It can be determined that the power switch 3 is opened a way exception.
As described above, detecting the voltage of the power supply unit 2 using first feedback circuit 41 is added, then arrange in pairs or groups this second time
The driving end voltage that circuit 42 detects the control unit 5 is awarded, judges the power switch by the pressure difference variation of the power switch 3
Whether 3 there is short-circuit abnormal or open circuit exception, reaches the occupied space of reduction circuit whereby and simplifies the configuration of circuit element
And reduce the effect of cost.
Please refer to Fig. 1, shown in 2, the method for detecting fault of the electronic stopping switch of one embodiment of the invention utilizes the above-mentioned reality
The detecting fault device 100 for applying the electronic stopping switch of example carries out investigations, which includes a starting step S1, one the
One judgment step S2, a short-circuit step S3, one second judgment step S4, a waiting step S5, an open circuit step S6 and a third
Judgment step S7.
With continued reference to shown in Fig. 1,2, starting step S1 is the lock on switch 22 to open a power supply unit 2, i.e.,
The lock on switch 22 forms conducting (Key-on).
With continued reference to shown in Fig. 1,2, first judgment step S2 is to compare one first feedback circuit using a control unit 5
Whether the second feedback voltage of 41 one first feedback voltage and one second feedback circuit 42 is identical, if first and second feedback
Voltage is identical, then the control unit 5 judges the power switch 3 for short-circuit exception.
With continued reference to shown in Fig. 1,2, short circuit step S3 is to make a preliminary filling switchs 62 after first judgment step S2
Short circuit is formed, i.e. the preliminary filling switchs 62 form conducting.
With continued reference to shown in Fig. 1,2, second judgment step S4, if second feedback voltage is the first feedback voltage
90% or more, then so that the power switch 3 is formed short circuit, i.e., the power switch 3 forms conducting.
With continued reference to shown in Fig. 1,2, then, in waiting step S5, wait 2 seconds.
With continued reference to shown in Fig. 1,2, open circuit step S6 makes the preliminary filling switchs 62 form open circuit and be formed and be not turned on.
With continued reference to shown in Fig. 1,2, third judgment step S7 is to compare first feedback voltage using the control unit 5
And second feedback voltage it is whether identical, if first and second feedback voltage is different, which judges the power switch
3 is abnormal for open circuit.
As described above, detecting the voltage of the power supply unit 2 using first feedback circuit 41 is added, then arrange in pairs or groups this second time
The driving end voltage that circuit 42 detects the control unit 5 is awarded, judges the power switch by the pressure difference variation of the power switch 3
Whether 3 there is short-circuit abnormal or open circuit exception, reaches the occupied space of further reduction circuit whereby and is further simplified electricity
The configuration of circuit component and the effect for reducing cost.
[symbol description]
100 detecting fault devices
2 power supply units
21 vehicle batteries
22 lock on switch
3 power switch
4 detecting units
41 first feedback circuits
42 second feedback circuits
5 control units
6 preliminary filling units
61 preliminary filling resistance
62 preliminary filling switchs
7 transistor modules
C power capacity
R1 first resistor
R2 second resistance
R3 3rd resistor
The 4th resistance of R4
R5 dead resistance
Claims (2)
1. a kind of method for detecting fault of electronic stopping switch, comprising the steps of:
One starting step, a lock on switch of the power supply unit of the detecting fault device to open electronic stopping switch, the failure
Arrangement for detecting also includes power switch, detecting unit and control unit, which has one first feedback circuit and one the
Two feedback circuits, first feedback circuit and the second feedback circuit are electrically connected the power switch both ends, and wherein this first time
Circuit is awarded with one first feedback voltage, which has one second feedback voltage；
One first judgment step compares first feedback voltage using the control unit and whether second feedback voltage is identical,
The control unit judges the power switch for short-circuit exception if they are the same；
One short-circuit step makes a preliminary filling switchs of the detecting fault device form short circuit after first judgment step；
One second judgment step makes the power switch shape if second feedback voltage is 90% or more of the first feedback voltage
At short circuit；
One open circuit step, makes the preliminary filling switchs form open circuit；And
One third judgment step compares first feedback voltage using the control unit and whether the second feedback voltage is identical, if
The different control units judge that the power switch is abnormal for open circuit.
2. the method for detecting fault of electronic stopping switch according to claim 1, which is characterized in that additionally comprise waiting step
Suddenly, it after second judgment step, waits 2 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459394.7A CN105425141B (en) | 2014-09-11 | 2014-09-11 | The detecting fault device and method for detecting of electronic stopping switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459394.7A CN105425141B (en) | 2014-09-11 | 2014-09-11 | The detecting fault device and method for detecting of electronic stopping switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105425141A CN105425141A (en) | 2016-03-23 |
| CN105425141B true CN105425141B (en) | 2019-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410459394.7A Expired - Fee Related CN105425141B (en) | 2014-09-11 | 2014-09-11 | The detecting fault device and method for detecting of electronic stopping switch |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108627765A (en) * | 2017-03-20 | 2018-10-09 | 华为技术有限公司 | A kind of detection circuit, method and apparatus |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4510753B2 (en) * | 2005-12-16 | 2010-07-28 | パナソニックＥｖエナジー株式会社 | Power supply device and control method thereof |
| CN101718842B (en) * | 2009-12-11 | 2012-03-14 | 北汽福田汽车股份有限公司 | Monitoring method and monitoring system for touch switch |
| CN102175971B (en) * | 2011-02-18 | 2013-10-16 | 奇瑞汽车股份有限公司 | Relay state detection method and device of electric vehicle high-voltage system |
| CN102269790A (en) * | 2011-04-22 | 2011-12-07 | 上海恒动汽车电池有限公司 | Fault diagnosis circuit for high-voltage relay of power storage battery |
| CN202268715U (en) * | 2011-08-31 | 2012-06-06 | 雷通科技发展有限公司 | Charging device possessing overcharge detection protection function |
| JP5983171B2 (en) * | 2012-08-10 | 2016-08-31 | 株式会社Ｇｓユアサ | Switch failure diagnosis device, power storage device |
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| CN105425141A (en) | 2016-03-23 |
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