CN103278776A - Electric automobile battery insulation detecting system - Google Patents
Electric automobile battery insulation detecting system Download PDFInfo
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- CN103278776A CN103278776A CN2013101764592A CN201310176459A CN103278776A CN 103278776 A CN103278776 A CN 103278776A CN 2013101764592 A CN2013101764592 A CN 2013101764592A CN 201310176459 A CN201310176459 A CN 201310176459A CN 103278776 A CN103278776 A CN 103278776A
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Abstract
The invention discloses an electric automobile battery insulation detecting system, which comprises a MCU (micro control unit), a power battery voltage detecting unit and an insulation detecting unit, wherein the insulation detecting unit respectively collects the voltage of the power battery positive end on an automobile chassis and the voltage of the power battery negative end on the automobile chassis according to insulation detecting control signals output by the MCU, in addition, the voltage is provided for the MCU, the MCU outputs insulation detecting control signals according to preset strategies, and in addition, the smaller one in the received voltage of the power battery positive end on the automobile chassis and the received voltage of the power battery negative end on the automobile chassis is determined as the insulation voltage value of the power battery on the whole automobile. The electric automobile battery insulation detecting system provided by the embodiment can accurately realize the electric automobile battery insulation voltage detection.
Description
Technical field
The present invention relates to batteries of electric automobile, relate in particular to a kind of batteries of electric automobile insulation detection system, belong to the electric automobile field.
Background technology
As non-renewable resources, the oil exhaustion in a foreseeable future namely may run into, and when the time comes, automobile industry will be used other substitute energys unavoidablely; In addition, the pollution emission of motor vehicle also is the subject matter of present city environmental pollution and climatic deterioration, also needs to seek a kind of clean energy resource of alternative use.For these reasons, the new-energy automobile that substitutes as orthodox car more and more is subjected to the extensive attention of automobile industry and widelys popularize, and also is one of main direction of present new automobile industry development.
Electrokinetic cell system is the important component part of electric automobile, for the operation of electric vehicle provides electric energy.The operating voltage of electrokinetic cell generally more than 300V, by adopting the higher voltage standard, can effectively reduce the working current of electrical equipment, reduces the weight of electrical equipment and car load.But, if the electrokinetic cell system operating voltage is more high, then also more high to the requirement of the insulating property between high-voltage system and the vehicle chassis.The high-voltage cable insulating medium is aging or be subjected to the influence of wet environment factor etc. all can cause decreasing insulating between high voltage circuit and the vehicle chassis, the electrokinetic cell positive and negative lead wires will constitute the leakage current loop by insulation course and chassis, make the chassis charged, this is entail dangers to passenger's personal safety not only, and will influence the operate as normal of low-voltage electrical and other controller of vehicle.When generation multiple spot insulating property seriously descend between high voltage circuit and the chassis, also can cause the heat accumulation effect of loop of electric leakage, may cause the electrical fire of vehicle.Therefore, detect the electrical insulation properties of the relative vehicle chassis of high-voltage electric system in real time, significant to guaranteeing passenger safety, electrical equipment operate as normal and vehicle safety operation.
Available dynamic battery insulation detection method mainly contains bridge balance principle and low frequency injection method.More according to the insulation detection device use that the bridge balance principle realizes, but it can not detect the situation the when insulation of electrokinetic cell system positive and negative electrode is equal to descend; And the stake resistance that the low frequency injection method can detect is subjected to the restriction of distributed capacitance over the ground of battery straight-flow system, and low-frequency ac signal is subjected to external interference easily.And in the design process of electrokinetic cell system, the insulation detection system that adopts said method to develop need be taked independent module, and it is bigger to take the power brick space, or needs the long time to confirm in testing process.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of batteries of electric automobile insulation detection system, can realize the detection to the batteries of electric automobile insulation voltage exactly.
A kind of batteries of electric automobile insulation detection system is provided to achieve these goals, comprises: micro-control unit MCU, electrokinetic cell voltage detection unit, insulation detecting unit, wherein:
Described insulation detecting unit is gathered respectively the voltage of chassis voltage and the electrokinetic cell negative terminal of chassis the electrokinetic cell anode according to the insulation detection control signal of MCU output, and is offered described MCU;
Described MCU detects control signal according to presetting strategy output insulation, and with the electrokinetic cell anode that receives in the voltage of chassis and the voltage of electrokinetic cell negative terminal to chassis less one be defined as electrokinetic cell to the insulation voltage value of car load.
Preferably, described batteries of electric automobile insulation detection system also comprises:
Described electrokinetic cell voltage detection unit is gathered according to the voltage detecting control signal pair voltage that is associated with electrokinetic cell voltage of described MCU output, and is offered described MCU;
At this moment, described MCU detects control signal according to presetting tactful output voltage, and determines electrokinetic cell voltage according to the voltage of gathering according to proportionate relationship in advance.
More preferably, in the said system, described electrokinetic cell voltage detection unit comprises further: divider resistance, first sampling resistor, cell voltage Acquisition Circuit and make the electrokinetic cell voltage acquisition control module that forms series via between power battery anode, divider resistance, first sampling resistor and the power battery cathode under the control of described voltage detecting control signal, and described battery Acquisition Circuit is used for gathering the voltage at the first sampling resistor two ends that are associated with electrokinetic cell voltage;
Described MCU determines that according to proportionate relationship in advance electrokinetic cell voltage further is according to the voltage of gathering: described MCU is according to the voltage of gathering, and the ratio that the described first sampling resistor resistance accounts for total resistance in the described series via is determined described electrokinetic cell voltage.
Further preferably, in the said system, described electrokinetic cell voltage acquisition control module comprises: first optocoupler of switching mode and second optocoupler of switching mode;
The first input end of described first optocoupler is connected with the first voltage detecting control signal output terminal of described MCU, second input end grounding, and first output terminal is connected with the positive pole of electrokinetic cell;
The first input end of described second optocoupler is connected with the second voltage detecting control signal output terminal of described MCU, second input end grounding, and first output terminal is connected with the negative pole of electrokinetic cell;
During according to the described first voltage detecting control signal and the described second voltage detecting control signal conducting, form series via between second output terminal of first output terminal of described power battery anode, described first optocoupler and second output terminal, divider resistance, first sampling resistor and described second optocoupler and first output terminal, the power battery cathode at described first optocoupler and described second optocoupler;
At this moment, described MCU comprises according to the voltage detecting control signal that presets strategy output: the first voltage detecting control signal and the second voltage detecting control signal.
Preferably, in the said system, be provided with the voltage difference treatment circuit between described cell voltage Acquisition Circuit and described first sampling resistor, the first sampling resistor voltage scale that is used for gathering reduces.
Preferably, in the above-mentioned system, described MCU determines that according to proportionate relationship in advance electrokinetic cell voltage further is according to the voltage of gathering: described MCU is according to the voltage of gathering, and the reduction ratio of the first sampling resistor voltage and the described first sampling resistor resistance account for the ratio of total resistance in the described series via and determine described electrokinetic cell voltage.
Preferably, in the above-mentioned system, described insulation detecting unit comprises further: second sampling resistor, the insulation voltage Acquisition Circuit, and under the control of described insulation detection control signal, make power battery anode successively, second sampling resistor, form series via between the ground, and make power battery cathode, second sampling resistor, the insulation that forms series via between the ground detects the voltage acquisition control module, described insulation voltage Acquisition Circuit be used for to be gathered the voltage at the described second sampling resistor two ends under above-mentioned two series via situations, respectively as the electrokinetic cell anode to the voltage of chassis and the electrokinetic cell negative terminal voltage to chassis.
More preferably, in the above-mentioned system, described insulation detects the voltage acquisition control module and comprises: the 3rd optocoupler of switching mode and the 4th optocoupler of switching mode;
The first input end of described the 3rd optocoupler detects the control signal output terminal with first insulation of described MCU and is connected, and first output terminal is connected with the positive pole of electrokinetic cell;
The first input end of described the 4th optocoupler is connected with the first input end of described first optocoupler, second input end detects the control signal output terminal with second insulation of described MCU and is connected, second input end is connected with second output terminal of described the 3rd optocoupler, and second output terminal is connected with the negative pole of electrokinetic cell;
When described the 3rd optocoupler detects the control signal conducting according to described first insulation, form series via between described power battery anode, second sampling resistor and the power battery cathode;
When described the 4th optocoupler detects the control signal conducting according to described second insulation, form series via between described power battery cathode, second sampling resistor and the power battery cathode;
At this moment, described MCU comprises according to the insulation detection control signal that presets strategy output: first insulation detects control signal and second insulation detects control signal.
There is following technique effect at least in the embodiment of the invention:
1) on-off mode of the system that proposes of the embodiment of the invention by simple controllable realizes the detection to the electrokinetic cell insulation voltage, can detect the situation of electrokinetic cell positive and negative electrode insulation respectively, especially the equal situation about descending of electrokinetic cell positive and negative electrode insulation makes that whole insulation detection security is higher;
2) system that proposes of the embodiment of the invention not only can detect insulation voltage, can also realize the real-time detection to the electrokinetic cell total voltage, satisfies different occasions for the detection demand of electrokinetic cell, uses wider;
3) system that proposes of the embodiment of the invention can directly be dissolved in the design of power battery management system, realize control voluntarily by power battery management system, the insulation of finishing electrokinetic cell system detects, the state of insulation of electrokinetic cell system can either be detected in real time, the power brick space can be effectively saved again.
Description of drawings
Fig. 1 is the schematic block circuit diagram of the embodiment of the invention.
Embodiment
A kind of batteries of electric automobile insulation detection system comprises: micro-control unit MCU, electrokinetic cell voltage detection unit and insulation detecting unit, wherein:
Described electrokinetic cell voltage detection unit is gathered according to the voltage detecting control signal pair voltage that is associated with electrokinetic cell voltage of described MCU output, and is offered described MCU;
Described insulation detecting unit is gathered respectively the voltage of chassis voltage and the electrokinetic cell negative terminal of chassis the electrokinetic cell anode according to the insulation detection control signal of MCU output, and is offered described MCU;
Described MCU, tactful output voltage detects control signal and insulation detects control signal according to presetting, and with the electrokinetic cell anode that receives in the voltage of chassis and the voltage of electrokinetic cell negative terminal to chassis less one be defined as electrokinetic cell to the insulation voltage value of car load.
For the purpose, technical scheme and the advantage that make the embodiment of the invention is clearer, below in conjunction with accompanying drawing specific embodiment is described in detail.
With reference to shown in Figure 1, be the schematic block circuit diagram of the batteries of electric automobile insulation detection system of the embodiment of the invention; As can be seen from Figure 1:
A) electrokinetic cell voltage detecting:
Described electrokinetic cell voltage detection unit comprises: divider resistance R3, R4, first optocoupler of the first sampling resistor R5, voltage difference treatment circuit, cell voltage Acquisition Circuit and switching mode and second optocoupler of switching mode; The first input end of described first optocoupler is connected with the first voltage detecting control signal output terminal of described MCU, second input end grounding, and first output terminal is connected with the positive pole of electrokinetic cell; The first input end of described second optocoupler is connected with the second voltage detecting control signal output terminal of described MCU, second input end grounding, and first output terminal is connected with the negative pole of electrokinetic cell; At described first optocoupler and described second optocoupler during according to the described first voltage detecting control signal and the described second voltage detecting control signal conducting, first output terminal of described power battery anode, described first optocoupler and second output terminal, divider resistance R3, the first sampling resistor R5, divider resistance R4, and second output terminal of described second optocoupler and first output terminal, power battery cathode between form series via; The described first voltage detecting control signal and the second voltage detecting control signal are exported according to presetting strategy by described MCU; After the voltage at the described first sampling resistor R5 two ends carries out the step-down processing through voltage difference treatment circuit (it is used for proportional reduction input voltage and output), import described cell voltage Acquisition Circuit, in described cell voltage Acquisition Circuit, carry out importing MCU after the analog to digital conversion.
In the specific implementation process, when needs are gathered electrokinetic cell voltage, the first voltage detecting control signal and the second voltage detecting control signal of MCU output high level, thus, the conducting work that is triggered of first optocoupler and second optocoupler forms series via between second output terminal of first output terminal of described power battery anode, described first optocoupler and second output terminal, divider resistance R3, the first sampling resistor R5, divider resistance R4 and described second optocoupler and first output terminal, the power battery cathode; Owing to can collect the operating voltage U of the first sampling resistor R5
R5, and simultaneously the voltage difference treatment circuit is known for the reduction ratio of collection voltage, for example, is K, MCU can determine that the voltage of electrokinetic cell is: U so
BT=K * U
R5* (R3+R4+R5)/R5.At last, the first voltage detecting control signal of MCU output low level and the second voltage detecting control signal are ended win optocoupler and second optocoupler, finish electrokinetic cell voltage detecting process.
Certainly, in foregoing circuit, the voltage difference treatment circuit that is provided for proportional reduction collection voltage is in order to reduce the voltage acquisition requirement to described cell voltage Acquisition Circuit, also can not arrange in some practical application, and the voltage when directly using the cell voltage Acquisition Circuit that first sampling resistor is worked is gathered; In order to access better collection effect, can be provided with filtering circuit at the input end of described cell voltage Acquisition Circuit.
Need to prove, in above-mentioned electrokinetic cell voltage acquisition process, utilized first optocoupler and second optocoupler to be used as the switch control assembly of electrokinetic cell voltage acquisition, in fact in other embodiments, also can utilize other electrokinetic cell voltage acquisition control module, only need be in described electrokinetic cell voltage acquisition control module, form series via between power battery anode, divider resistance, first sampling resistor and the power battery cathode and get final product can making under the control of voltage detecting control signal.
B) insulation voltage detects:
Described insulation detecting unit comprises further: the 3rd optocoupler of the second sampling resistor R6, insulation voltage Acquisition Circuit and switching mode and the 4th optocoupler of switching mode; The first input end of described the 3rd optocoupler detects the control signal output terminal with first insulation of described MCU and is connected, and first output terminal is connected (also can be connected with the positive pole of electrokinetic cell by pull-up resistor R1) with the positive pole of electrokinetic cell; The first input end of described the 4th optocoupler is connected with the first input end of described first optocoupler, second input end detects the control signal output terminal with second insulation of described MCU and is connected, second input end is connected with second output terminal of described first optocoupler, and second output terminal is connected with the negative pole of electrokinetic cell; When described the 3rd optocoupler detects the control signal conducting according to described first insulation, form series via between described power battery anode, the second sampling resistor R6 and the ground (automobile chassis); When described the 4th optocoupler detects the control signal conducting according to described second insulation, form series via between described power battery cathode, the second sampling resistor R6 and the ground (automobile chassis); First insulation detects control signal and the second insulation detection control signal presets strategy output by described MCU basis; The described second sampling resistor R6 voltage-to-ground is imported described insulation voltage Acquisition Circuit, carries out importing MCU after the analog to digital conversion in described insulation voltage Acquisition Circuit.
In the specific implementation process, when needs carry out the insulation voltage collection, first insulation that MCU at first exports high level detects control signal, make and the conducting work that is triggered of the 3rd optocoupler form series via between first output terminal of described power battery anode, described the 3rd optocoupler, second output terminal, the second sampling resistor R6 and the ground (automobile chassis); The voltage that this moment, the insulation voltage Acquisition Circuit was gathered is: the electrokinetic cell anode is to the voltage of chassis.Then, second insulation that first insulation of MCU output low level detects control signal and high level detects control signal, make and the conducting work that is triggered of the 4th optocoupler form series via between second output terminal of described power battery cathode, described the 4th optocoupler, first output terminal, the second sampling resistor R6 and the ground (automobile chassis); The voltage that this moment, the insulation voltage Acquisition Circuit was gathered is: the electrokinetic cell negative terminal is to the voltage of chassis; Described MCU with the electrokinetic cell anode that receives in the voltage of chassis and the voltage of electrokinetic cell negative terminal to chassis less one be defined as electrokinetic cell to the insulation voltage value of car load; At last, second insulation of MCU output low level detects control signal, finishes the insulation voltage testing process.
Certainly, in foregoing circuit, in order to access better collection effect, can be provided with filtering circuit at the input end of described insulation voltage Acquisition Circuit.
Need to prove, in above-mentioned insulation voltage testing process, utilize the 3rd optocoupler and the 4th optocoupler to be used as the switch control assembly that insulation voltage is gathered, in fact in other embodiments, also can utilize the insulation voltage acquisition control module, only need in described insulation voltage acquisition control module, under the control of insulation voltage detection control signal, make power battery anode successively, the second sampling resistor R6, form series via between the ground (automobile chassis), and make power battery cathode, the second sampling resistor R6, forming series via between the ground (automobile chassis) gets final product.
For above-mentioned electrokinetic cell insulation detection system, described MCU can also be integrated into a MCU with the MCU of power battery management system, MCU after integrated not only is responsible for the original function of cell management system of electric automobile, and be responsible for finishing output and the collection of all voltage signals and the realization of insulation detection algorithm of all control signals in the above-mentioned electrokinetic cell insulation testing process, that is to say, the insulation measuring ability of electrokinetic cell system can be integrated in the power battery management system, and needn't develop independent insulation monitoring module, thereby effectively saved the space of electrokinetic cell bag.
As from the foregoing, the embodiment of the invention has following advantage:
1) on-off mode of the system that proposes of the embodiment of the invention by simple controllable realizes the detection to the electrokinetic cell insulation voltage, can detect the situation of electrokinetic cell positive and negative electrode insulation respectively, especially the equal situation about descending of electrokinetic cell positive and negative electrode insulation makes that whole insulation detection security is higher;
2) system that proposes of the embodiment of the invention not only can detect insulation voltage, can also realize the real-time detection to the electrokinetic cell total voltage, satisfies different occasions for the detection demand of electrokinetic cell, uses wider;
3) system that proposes of the embodiment of the invention can directly be dissolved in the design of power battery management system, realize control voluntarily by power battery management system, the insulation of finishing electrokinetic cell system detects, the state of insulation of electrokinetic cell system can either be detected in real time, the power brick space can be effectively saved again.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. batteries of electric automobile insulation detection system comprises: micro-control unit MCU, electrokinetic cell voltage detection unit, insulation detecting unit, wherein:
Described insulation detecting unit is gathered respectively the voltage of chassis voltage and the electrokinetic cell negative terminal of chassis the electrokinetic cell anode according to the insulation detection control signal of MCU output, and is offered described MCU;
Described MCU detects control signal according to presetting strategy output insulation, and with the electrokinetic cell anode that receives in the voltage of chassis and the voltage of electrokinetic cell negative terminal to chassis less one be defined as electrokinetic cell to the insulation voltage value of car load.
2. batteries of electric automobile insulation detection system according to claim 1 is characterized in that,
Described batteries of electric automobile insulation detection system also comprises:
Described electrokinetic cell voltage detection unit is gathered according to the voltage detecting control signal pair voltage that is associated with electrokinetic cell voltage of described MCU output, and is offered described MCU;
At this moment, described MCU detects control signal according to presetting tactful output voltage, and determines electrokinetic cell voltage according to the voltage of gathering according to proportionate relationship in advance.
3. batteries of electric automobile insulation detection system according to claim 2 is characterized in that,
Described electrokinetic cell voltage detection unit comprises further: divider resistance, first sampling resistor, cell voltage Acquisition Circuit and make the electrokinetic cell voltage acquisition control module that forms series via between power battery anode, divider resistance, first sampling resistor and the power battery cathode under the control of described voltage detecting control signal, and described battery Acquisition Circuit is used for gathering the voltage at the first sampling resistor two ends that are associated with electrokinetic cell voltage;
Described MCU determines that according to proportionate relationship in advance electrokinetic cell voltage further is according to the voltage of gathering: described MCU is according to the voltage of gathering, and the ratio that the described first sampling resistor resistance accounts for total resistance in the described series via is determined described electrokinetic cell voltage.
4. batteries of electric automobile insulation detection system according to claim 3 is characterized in that,
Described electrokinetic cell voltage acquisition control module comprises: first optocoupler of switching mode and second optocoupler of switching mode;
The first input end of described first optocoupler is connected with the first voltage detecting control signal output terminal of described MCU, second input end grounding, and first output terminal is connected with the positive pole of electrokinetic cell;
The first input end of described second optocoupler is connected with the second voltage detecting control signal output terminal of described MCU, second input end grounding, and first output terminal is connected with the negative pole of electrokinetic cell;
During according to the described first voltage detecting control signal and the described second voltage detecting control signal conducting, form series via between second output terminal of first output terminal of described power battery anode, described first optocoupler and second output terminal, divider resistance, first sampling resistor and described second optocoupler and first output terminal, the power battery cathode at described first optocoupler and described second optocoupler;
At this moment, described MCU comprises according to the voltage detecting control signal that presets strategy output: the first voltage detecting control signal and the second voltage detecting control signal.
5. batteries of electric automobile according to claim 3 insulation detection system, it is characterized in that, be provided with the voltage difference treatment circuit between described cell voltage Acquisition Circuit and described first sampling resistor, the first sampling resistor voltage scale that is used for gathering reduces.
6. batteries of electric automobile insulation detection system according to claim 5 is characterized in that,
Described MCU determines that according to proportionate relationship in advance electrokinetic cell voltage further is according to the voltage of gathering: described MCU is according to the voltage of gathering, and the reduction ratio of the first sampling resistor voltage and the described first sampling resistor resistance account for the ratio of total resistance in the described series via and determine described electrokinetic cell voltage.
7. batteries of electric automobile insulation detection system according to claim 1 is characterized in that,
Described insulation detecting unit comprises further: second sampling resistor, the insulation voltage Acquisition Circuit, and under the control of described insulation detection control signal, make power battery anode successively, second sampling resistor, form series via between the ground, and make power battery cathode, second sampling resistor, form the insulation voltage acquisition control module of series via between the ground, described insulation voltage Acquisition Circuit be used for to be gathered the voltage at the described second sampling resistor two ends under above-mentioned two series via situations, respectively as the electrokinetic cell anode to the voltage of chassis and the electrokinetic cell negative terminal voltage to chassis.
8. batteries of electric automobile insulation detection system according to claim 7 is characterized in that described insulation detects the voltage acquisition control module and comprises: the 3rd optocoupler of switching mode and the 4th optocoupler of switching mode;
The first input end of described the 3rd optocoupler detects the control signal output terminal with first insulation of described MCU and is connected, and first output terminal is connected with the positive pole of electrokinetic cell;
The first input end of described the 4th optocoupler is connected with the first input end of described the 3rd optocoupler, second input end detects the control signal output terminal with second insulation of described MCU and is connected, second input end is connected with second output terminal of described the 3rd optocoupler, and second output terminal is connected with the negative pole of electrokinetic cell;
When described the 3rd optocoupler detects the control signal conducting according to described first insulation, form series via between described power battery anode, second sampling resistor and the power battery cathode;
When described the 4th optocoupler detects the control signal conducting according to described second insulation, form series via between described power battery cathode, second sampling resistor and the power battery cathode;
At this moment, described MCU comprises according to the insulation detection control signal that presets strategy output: first insulation detects control signal and second insulation detects control signal.
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| CN104407220A (en) * | 2014-11-20 | 2015-03-11 | 合肥国轩高科动力能源股份公司 | High-voltage insulation resistance measuring equipment for electric automobile |
| CN104569772A (en) * | 2014-12-18 | 2015-04-29 | 北京新能源汽车股份有限公司 | Electric high-voltage direct current insulation detecting circuit and method |
| CN104569772B (en) * | 2014-12-18 | 2017-11-17 | 北京新能源汽车股份有限公司 | Driven high voltage direct current insulation detecting circuit and method |
| CN106383314A (en) * | 2016-08-26 | 2017-02-08 | 科力远混合动力技术有限公司 | Automobile power battery pack insulation detection circuit and detection judgment method |
| CN108072792A (en) * | 2016-11-18 | 2018-05-25 | 马亨德拉雷瓦电动汽车有限公司 | For monitoring the system and method for the isolation in high-voltage system |
| CN107576900B (en) * | 2017-05-07 | 2019-08-23 | 安徽优旦科技有限公司 | A kind of electric car full voltage platform Insulation Inspection System |
| CN107576900A (en) * | 2017-05-07 | 2018-01-12 | 安徽优旦科技有限公司 | A kind of electric automobile full voltage platform Insulation Inspection System |
| CN108445870A (en) * | 2018-04-02 | 2018-08-24 | 精进电动科技股份有限公司 | A kind of electric machine controller insulating monitoring circuit |
| US11448681B2 (en) | 2018-04-02 | 2022-09-20 | Jing-Jin Electric Technologies Co., Ltd. | Insulation monitoring circuit for motor controller |
| CN109031061A (en) * | 2018-07-10 | 2018-12-18 | 安徽贵博新能科技有限公司 | A kind of electric automobile power battery group insulation detecting circuit |
| CN109765430B (en) * | 2019-03-26 | 2021-06-29 | 北京经纬恒润科技股份有限公司 | Insulation impedance detection system and detection method |
| CN109765430A (en) * | 2019-03-26 | 2019-05-17 | 北京经纬恒润科技有限公司 | A kind of insulation impedance detection system and detection method |
| CN111474449A (en) * | 2020-03-31 | 2020-07-31 | 福建时代星云科技有限公司 | Insulation detection method and system of optical storage and charge detection system |
| CN112180269A (en) * | 2020-10-14 | 2021-01-05 | 普联技术有限公司 | Battery pack access identification method and system |
| CN115078813A (en) * | 2022-05-12 | 2022-09-20 | 东方电气集团科学技术研究院有限公司 | Circuit and method for detecting insulation resistance and total pressure of energy storage BMS |
| CN115078813B (en) * | 2022-05-12 | 2024-05-17 | 东方电气集团科学技术研究院有限公司 | Circuit and method for detecting insulation resistance and total voltage of energy storage BMS |
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