CN207717864U - Storage battery insulating resistance detecting circuit - Google Patents
Storage battery insulating resistance detecting circuit Download PDFInfo
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- CN207717864U CN207717864U CN201721880923.6U CN201721880923U CN207717864U CN 207717864 U CN207717864 U CN 207717864U CN 201721880923 U CN201721880923 U CN 201721880923U CN 207717864 U CN207717864 U CN 207717864U
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- switch
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- storage battery
- sample resistance
- accumulator
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Abstract
The utility model discloses a kind of storage battery insulating resistance detecting circuits, belong to electric vehicle manufacturing technology field, the storage battery insulating resistance detecting circuit, it include the detection circuit being connect with accumulator, it includes the positive bus-bar detection branch being connected between accumulator positive busbar and vehicle shell and the negative busbar detection branch being connected between storage battery negative busbar and vehicle shell to detect circuit, the first sample resistance is concatenated between positive bus-bar detection branch and vehicle shell, the second sample resistance is concatenated between negative busbar detection branch and vehicle shell, first switch of connecting between positive bus-bar detection branch and accumulator positive plate and first resistor, it connects between negative busbar detection branch and storage battery negative plate second switch and second resistance.The utility model can solve the problems, such as that the detection of existing storage battery insulating resistance can not be to being always just detected with total negative electric leakage situation simultaneously.
Description
Technical field
The present invention relates to electric vehicle manufacturing technology fields, especially a kind of insulation resistance for accumulator of electric car
Detection circuit.
Background technology
Accumulator is the power resources of electric vehicle, with the long-time service of accumulator, accumulator can because of reasons such as agings,
Cause occur the phenomenon that electric leakage, failure of insulation between accumulator and vehicle chassis, since the voltage platform of accumulator is higher, output
Electric current is larger, once electric leakage, failure of insulation, can cause fatal harm to the driver of electric vehicle and passenger, and it is therefore, electronic
The insulation resistance of its accumulator is detected in real time in the operation of automobile.Existing storage battery insulating resistance detecting circuit,
Including the positive bus-bar detection branch being connected between battery positive bus-bar and vehicle shell and it is connected between battery negative busbar and the vehicle shell
Negative busbar detection branch concatenates the first sample resistance, the negative busbar inspection between the positive bus-bar detection branch and the vehicle shell
It surveys between branch and the vehicle shell and concatenates the second sample resistance；When detection, if when Up/Un=Rps/Rns, indicating insulation performance
Well；If when Up/Un ≠ Rps/Rns, indicating positive bus-bar or the unilateral electric leakage of negative busbar；Wherein：Up is the first sample resistance both ends
Voltage value Up, Rps is the first sample resistance value；Un is that the voltage value Un, Rns at the second both ends sample resistance Rns take for second
Sample resistance value；But this storage battery insulating resistance detecting circuit there is：When positive bus-bar and negative busbar are leaked electricity simultaneously, Rp and Rn
Value can become smaller simultaneously, in this way, this value of Up/Un=Rps/Rns will not become, can not judge whether leak electricity under the situation, only
The situation of positive bus-bar or the unilateral electric leakage of negative busbar can be detected, the situation that can not simultaneously leak electricity to positive bus-bar and negative busbar is detected
The problem of.
Invention content
The present invention provides a kind of storage battery insulating resistance detecting circuit, which can solve existing storage battery insulating resistance
Detection can not to positive bus-bar and negative busbar electric leakage situation is detected simultaneously the problem of.
To solve the above-mentioned problems, the technical solution adopted in the present invention is：This storage battery insulating resistance detecting circuit,
Include the detection circuit being connect with accumulator, the detection circuit includes being connected between the accumulator positive busbar and vehicle shell just
Busbar detection branch and the negative busbar detection branch being connected between the storage battery negative busbar and the vehicle shell, the positive bus-bar inspection
It surveys between branch and the vehicle shell and concatenates the first sample resistance, second is concatenated between the negative busbar detection branch and the vehicle shell
Sample resistance, connect between the positive bus-bar detection branch and the accumulator positive plate first switch and first resistor are described negative
It connects between busbar detection branch and the storage battery negative plate second switch and second resistance.
In above-mentioned technical proposal, more specific technical solution can also be：Accumulator connection when the first switch,
When the second switch is closed, the voltage value at first sample resistance both ends is Up0, second sample resistance both ends
Voltage value is Un0；When the first switch is closed, the second switch disconnects, the voltage at first sample resistance both ends
Value is Up1, and the voltage value at second sample resistance both ends is Un1；When the first switch disconnects, the second switch is closed
When, the voltage value at first sample resistance both ends is Up2, and the voltage value at second sample resistance both ends is Un2；Above three
After kind situation is surveyed one time with any order, if Un0/Up0 ≠ Rps/Rns, positive bus-bar or negative busbar electric leakage are indicated；If Un0/Up0=
Rps/Rns, Un1+Up2 ≠ U indicate positive bus-bar and the detection circuit that negative busbar is leaked electricity simultaneously；
Wherein：The first sample resistance value is Rps, and the second sample resistance value is Rns, the rated voltage of accumulator
Value is U.
By adopting the above-described technical solution, the present invention has the advantages that compared with prior art：
1, since detection circuit includes the positive bus-bar detection branch being connected between the accumulator positive busbar and vehicle shell and connects
Negative busbar detection branch between storage battery negative busbar and vehicle shell concatenates the first sampling between positive bus-bar detection branch and vehicle shell
Resistance concatenates the second sample resistance, between positive bus-bar detection branch and accumulator positive plate between negative busbar detection branch and vehicle shell
First switch of connecting and first resistor, connect between negative busbar detection branch and storage battery negative plate second switch and second resistance,
Can opening or closing by first switch and the second switch, measure the electricity of the first sample resistance and the second sample resistance both ends respectively
Pressure value, can judge accumulator of electric car positive bus-bar with this and negative busbar whether unilateral electric leakage or the situation leaked electricity simultaneously；
2, due to being connected with first resistor, the second sample resistance and second switch between the first sample resistance and first switch
Between be connected with second resistance, play the role of decompression.
Description of the drawings
Fig. 1 is the circuit diagram of storage battery insulating resistance detection of the present invention.
Fig. 2 is that Fig. 1 first switches are closed, circuit diagram when second switch disconnects.
Fig. 3 is that Fig. 1 first switches disconnect, circuit diagram when second switch is closed.
Specific implementation mode
The present invention will be further described below with reference to the accompanying drawings：
Storage battery insulating resistance detecting circuit shown in FIG. 1 includes the detection being connect with the accumulator that load voltage value is U
Circuit, the detection circuit include the positive bus-bar detection branch being connected between the positive bus-bar of accumulator 1 and vehicle shell 4 and are connected on accumulator
Negative busbar detection branch between 1 negative busbar and vehicle shell 4, positive bus-bar Insulation monitoring branch road are serially connected with first resistor 8 and electricity
Resistance value is the first sample resistance 2 of Rps；It is Rns's that negative busbar Insulation monitoring branch road, which is serially connected with second resistance 10 and resistance value,
Second sample resistance 3；One end of first resistor 8 is connected by first switch 7 with the anode of accumulator 1, first resistor 8 it is another
One end is connected with one end of the first sample resistance 2, and the other end of the first sample resistance 2 is connected with car body 4；Second resistance 10
One end be connected with the cathode of accumulator 1 by second switch 9, the other end of second resistance 10 and the second sample resistance 3
One end is connected, and the other end of the second sample resistance 3 is connected with car body 4；Wherein, first switch, second switch are closed, and are used
Voltmeter measure the voltage value at the first sample resistance both ends is Up0, the voltage value at the second sample resistance both ends is Un0；
As shown in Fig. 2, first switch is closed, second switch disconnects, the first sample resistance both ends are measured to obtain with voltmeter
Voltage value is Up1, and the voltage value at the second sample resistance both ends is Un1；
As shown in figure 3, first switch disconnects, second switch is closed, the first sample resistance both ends are measured to obtain with voltmeter
Voltage value is Up2, and the voltage value at the second sample resistance both ends is Un2；
After tri- kinds of situations of Fig. 1, Fig. 2, Fig. 3 are measured one time with any order, if Un0/Up0 ≠ Rps/Rns, positive bus-bar is indicated
Or negative busbar electric leakage；If Un0/Up0=Rps/Rns, Un1+Up2 ≠ U, indicate that positive bus-bar and negative busbar leak electricity simultaneously.
Claims (2)
1. a kind of storage battery insulating resistance detecting circuit includes the detection circuit being connect with accumulator, it is characterised in that：The inspection
Survey line road includes the positive bus-bar detection branch being connected between the accumulator positive busbar and vehicle shell and to be connected on the storage battery negative female
Negative busbar detection branch between line and the vehicle shell concatenates the first sampling between the positive bus-bar detection branch and the vehicle shell
Resistance concatenates the second sample resistance, the positive bus-bar detection branch and institute between the negative busbar detection branch and the vehicle shell
Series connection first switch and first resistor between accumulator positive plate are stated, between the negative busbar detection branch and the storage battery negative plate
Series connection second switch and second resistance.
2. storage battery insulating resistance detecting circuit according to claim 1, it is characterised in that：Institute is worked as in the accumulator connection
State first switch, when the second switch is closed, the voltage value at first sample resistance both ends is Up0, and described second takes
The voltage value at sample resistance both ends is Un0；When the first switch is closed, the second switch disconnects, the first sampling electricity
The voltage value for hindering both ends is Up1, and the voltage value at second sample resistance both ends is Un1；When the first switch disconnect, it is described
When second switch is closed, the voltage value at first sample resistance both ends is Up2, the voltage value at second sample resistance both ends
For Un2；After three cases above is surveyed one time with any order, if Un0/Up0 ≠ Rps/Rns, positive bus-bar or negative busbar leakage are indicated
Electricity；If Un0/Up0=Rps/Rns, Un1+Up2 ≠ U, positive bus-bar and the detection circuit that negative busbar is leaked electricity simultaneously are indicated；
Wherein：The first sample resistance value is Rps, and the second sample resistance value is Rns, and the load voltage value of accumulator is
U。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721880923.6U CN207717864U (en) | 2017-12-28 | 2017-12-28 | Storage battery insulating resistance detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721880923.6U CN207717864U (en) | 2017-12-28 | 2017-12-28 | Storage battery insulating resistance detecting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN207717864U true CN207717864U (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721880923.6U Active CN207717864U (en) | 2017-12-28 | 2017-12-28 | Storage battery insulating resistance detecting circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462203A (en) * | 2019-09-09 | 2021-03-09 | 中车时代电动汽车股份有限公司 | Power battery insulation detection method and related device |
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2017
- 2017-12-28 CN CN201721880923.6U patent/CN207717864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462203A (en) * | 2019-09-09 | 2021-03-09 | 中车时代电动汽车股份有限公司 | Power battery insulation detection method and related device |
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