CN207662966U - Battery pack insulating resistor detecting circuit, battery management system and electric vehicle - Google Patents
Battery pack insulating resistor detecting circuit, battery management system and electric vehicle Download PDFInfo
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- CN207662966U CN207662966U CN201721663173.7U CN201721663173U CN207662966U CN 207662966 U CN207662966 U CN 207662966U CN 201721663173 U CN201721663173 U CN 201721663173U CN 207662966 U CN207662966 U CN 207662966U
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Abstract
The utility model discloses a kind of battery pack insulating resistor detecting circuit, battery management system and electric vehicles.The circuit includes：Voltage detecting circuit, for accessing insulation detecting circuit, to measure the anode voltage value over the ground of battery pack and the cathode voltage value over the ground of battery pack, and the voltage value of the anode voltage value over the ground of battery pack and the cathode of battery pack over the ground after access preset resistance；Voltage detecting circuit includes：ADC chips；First divider resistance, it is in parallel with ADC chips；Second divider resistance is connected with the first divider resistance；Wherein, the initial resistance value of voltage detecting circuit is determined by the internal resistance of ADC chips, the first divider resistance and the second divider resistance.The utility model solves the Insulation monitoring result that the Insulation monitoring mode provided in the relevant technologies obtains, and there are errors, the technical issues of easily causing the wrong report of insulation fault or fail to report.
Description
Technical field
The utility model is related to electric vehicle fields, in particular to a kind of battery pack insulating resistor detecting circuit, electricity
Pond manages system and electric vehicle.
Background technology
Currently, more popularizing with New-energy electric vehicle, occupation rate of market rises year by year, and the safety of electric vehicle is asked
Topic gradually becomes users' focus of attention, especially in terms of insulation.Electric vehicle needs to calculate vehicle in use
Insulation resistance, and then judge whether vehicle will appear Insulation Problems.
In actual application, Insulation monitoring is carried out generally according to the method provided in GB standard, needs acquisition electricity
Pond packet positive and negative electrode and vehicle body voltage data between (i.e. battery pack and vehicle body altogether) calculate insulation resistance.Fig. 1 a-1d
It is according to the circuit theory schematic diagram of the battery pack insulation resistance detection method of the relevant technologies, as is shown in figs. la to ld, each device
Meaning be described as follows：
(1) R1 is the equivalent insulation resistance between battery pack anode and vehicle body ground；
(2) equivalent insulation resistances of the R2 between battery pack cathode and vehicle body ground；
(3) R0 is known measuring resistance；
(4) voltage between V1 battery packs anode and vehicle body ground；
(5) V1 ' is between battery pack anode and vehicle body ground after parallel resistance R0, between battery pack anode and vehicle body ground
Voltage；
(6) voltages of the V2 between battery pack cathode and vehicle body ground；
(7) V2 ' is between battery pack cathode and vehicle body ground after parallel resistance R0, between battery pack cathode and vehicle body ground
Voltage.
Positive and negative anodes insulation resistance resistance value R1 and R2 can be solved according to above-mentioned each device, it is specific to indicate as follows：
The precision and reliability of voltage detecting circuit are the preconditions of insulation resistance detection reliability.Due to voltage detecting
In view of in calculating process in measurement process, internal resistance possessed by voltage detecting circuit itself can be due to for the internal resistance of circuit itself
Environment temperature, aging influence change.This can have an impact the result obtained in measurement, so that Insulation monitoring knot
There are errors for fruit, and then the insulating resistance value being calculated is caused not to be inconsistent with actual insulating resistance value, thereby result in wrong report, leakage
The more serious consequences such as report, threaten to the personal and property safety of user.
For above-mentioned problem, currently no effective solution has been proposed.
Utility model content
The utility model at least partly embodiment provides a kind of battery pack insulating resistor detecting circuit, battery management system
And electric vehicle, exist by the Insulation monitoring result at least solving to obtain in a manner of the Insulation monitoring provided in the relevant technologies and misses
Difference, the technical issues of easily causing the wrong report of insulation fault or fail to report.
According to the utility model wherein embodiment, a kind of battery pack insulating resistor detecting circuit is provided, including：
Voltage detecting circuit, for accessing insulation detecting circuit, to measure the voltage value and electricity of the anode of battery pack over the ground
The positive voltage value and battery pack over the ground of battery pack after the voltage value of the cathode of Chi Bao over the ground, and access preset resistance
The voltage value of cathode over the ground；Voltage detecting circuit includes：A-D converter (ADC) chip；First divider resistance, with ADC chips
It is in parallel；Second divider resistance is connected with the first divider resistance；Wherein, the initial resistance value of voltage detecting circuit is by ADC chips
Resistance, the first divider resistance and the second divider resistance determine.
Optionally, insulation detecting circuit includes：Battery pack, wherein the anode and the cathode of battery pack of battery pack connect respectively
Ground, the anode internal resistance over the ground of battery pack are equivalent to the first insulation resistance, and the internal resistance of the cathode of battery pack over the ground is equivalent to second
Insulation resistance.
Optionally, foregoing circuit further includes：Correcting circuit；Correcting circuit includes at least：The first branch and the second branch；The
One branch includes at least：First correction resistance, one end are coupled with the second divider resistance, the first default electricity of other end access
Pressure；The second branch includes at least：Second correction resistance, one end are coupled with the second divider resistance, other end access second
Predeterminated voltage.
Optionally, the first predeterminated voltage is identical as the second predeterminated voltage.
Optionally, the first correction resistance is identical as the second correction resistance.
According to the utility model wherein embodiment, a kind of battery management system is additionally provided, including：Above-mentioned battery pack is exhausted
Edge resistance detecting circuit.
According to the utility model wherein embodiment, a kind of electric vehicle is additionally provided, including：Above-mentioned battery management system
System.
In the utility model at least partly embodiment, include using voltage detecting circuit：ADC chips；First partial pressure electricity
Resistance, it is in parallel with ADC chips；Second divider resistance is connected with the first divider resistance；Wherein, the initial resistance value of voltage detecting circuit
The mode determined by the internal resistance of ADC chips, the first divider resistance and the second divider resistance is used for by voltage detecting circuit
Insulation detecting circuit is accessed, to measure the anode voltage value over the ground of battery pack and the cathode voltage value over the ground of battery pack, with
And the voltage value of the anode voltage value over the ground of battery pack and the cathode of battery pack over the ground after access preset resistance, reach true
The purpose for protecting the accuracy of detection and reliability of battery pack insulating resistor detecting circuit promotes battery pack insulation resistance to realize
The technique effect of the accuracy of detection of detection circuit, the reliability of enhancing battery pack insulating resistor detecting circuit, and then solve phase
The Insulation monitoring result that Insulation monitoring mode provided in the technology of pass obtains there are error, easily cause insulation fault wrong report or
The technical issues of failing to report.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 a-1d are the circuit theory schematic diagrams according to the battery pack insulation resistance detection method of the relevant technologies；
Fig. 2 is the structural schematic diagram according to the battery pack insulating resistor detecting circuit of the utility model wherein embodiment；
Fig. 3 is the structural representation according to the battery pack insulating resistor detecting circuit of the utility model wherein preferred embodiment
Figure；
Fig. 4 a-4d are shown according to the battery pack insulating resistor detecting circuit principle of the utility model wherein preferred embodiment
It is intended to.
Specific implementation mode
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
It should be noted that term " first " in the specification and claims of the utility model and above-mentioned attached drawing,
" second " etc. is for distinguishing similar object, without being used to describe specific sequence or precedence.It should be appreciated that in this way
The data used can be interchanged in the appropriate case, so that the embodiments of the present invention described herein can be in addition at this
In illustrate or description those of other than sequence implement.In addition, term " comprising " and " having " and their any deformation, meaning
Figure be to cover it is non-exclusive include, for example, containing the process of series of steps or unit, method, system, product or equipment
Those of be not necessarily limited to clearly to list step or unit, but may include not listing clearly or for these processes,
The intrinsic other steps of method, product or equipment or unit.
According to the utility model wherein embodiment, a kind of embodiment of battery pack insulating resistor detecting circuit is provided,
It should be noted that step shown in the flowchart of the accompanying drawings can be in the department of computer science of such as a group of computer-executable instructions
It is executed in system, although also, logical order is shown in flow charts, and it in some cases, can be to be different from herein
Sequence execute shown or described step.
Fig. 2 be according to the structural schematic diagram of the battery pack insulating resistor detecting circuit of the utility model wherein embodiment,
As shown in Fig. 2, the battery pack insulating resistor detecting circuit includes：Voltage detecting circuit 1, for accessing insulation detecting circuit, with
Measure the voltage value of the cathode of the positive voltage value and battery pack over the ground of battery pack over the ground, and electricity after access preset resistance
The voltage value of the cathode of the positive voltage value and battery pack over the ground of Chi Bao over the ground；Voltage detecting circuit 1 includes：A-D converter
(ADC) chip, internal resistance R6；First divider resistance R4, it is in parallel with ADC chips；Second divider resistance R5, with the first partial pressure electricity
Resistance series connection；Wherein, the initial resistance value of voltage detecting circuit is by the internal resistance of ADC chips, the first divider resistance and the second partial pressure electricity
Resistance determines.
It is higher in view of the Insulation monitoring function significance level of electric vehicle, therefore the computational accuracy of Insulation monitoring and reliable
Property just seems particularly significant.But when the calculating of the terminal voltage method progress insulation resistance provided in the related art, voltage inspection
The internal resistance of slowdown monitoring circuit can produce bigger effect computational accuracy, therefore, need to consider voltage detecting circuit in calculating process
Internal resistance value.And the internal resistance value of voltage detecting circuit may include：Known voltage divider circuit Resistance and unknown ADC chip internal resistances
Value, therefore, it is necessary to be demarcated to ADC chip internal resistance values.Again due to voltage detecting circuit internal resistance value can by environment temperature,
The influence of the uncertain factors such as aging changes, to reduce the reliability of Insulation monitoring result.For this purpose, by using correction
Circuit can calibrate the mode of the ADC chip internal resistance values of voltage detecting circuit, can effectively improve insulation resistance and calculate essence
Degree.Furthermore it is also possible to the reliability of Insulation monitoring is ensured by the way of periodically on-line proving ADC chips internal resistance value, into
And provide security guarantee for electric vehicle long-time service, and the mode simple operation of on-line proving, cost is relatively low and implements
Feasibility is higher.
Fig. 3 is the structural representation according to the battery pack insulating resistor detecting circuit of the utility model wherein preferred embodiment
Figure, as shown in figure 3, insulation detecting circuit 2 includes：Battery pack 20, wherein the anode and the cathode of battery pack of battery pack connect respectively
Ground, the anode internal resistance over the ground of battery pack are equivalent to the first insulation resistance R1, and the internal resistance of the cathode of battery pack over the ground is equivalent to the
Two insulation resistance R2.
After voltage detecting circuit is connected to correcting circuit, the first divider resistance first it is in parallel with ADC chips, then successively with
Second divider resistance and the first correction resistance series connection.Then, then access the first predeterminated voltage (such as：5V), predetermined current phase
Together.Therefore, following calculation formula can be obtained：
First predeterminated voltage=predetermined current × (resistance value of the first divider resistance | | the internal resistance value+the second of ADC chips divides
The resistance value of the resistance value of resistance and the first correction resistance)；
Due to the first predeterminated voltage, predetermined current, the resistance value of the first divider resistance, the second divider resistance in above-mentioned formula
Resistance value and first correction resistance resistance value it is known that therefore, the internal resistance of ADC chips can be calculated by above-mentioned formula
Value.In the internal resistance value that ADC chips are calculated and then resistance value, the resistance value of the second divider resistance by the first divider resistance
And the internal resistance value of ADC chips seeks the initial resistance value of voltage detecting circuit.
Fig. 4 a-4d are shown according to the battery pack insulating resistor detecting circuit principle of the utility model wherein preferred embodiment
Be intended to, as shown in figures 4a-4d, R1 be battery pack anode vehicle body ground between equivalent insulation resistance, R2 be battery pack cathode with
Equivalent insulation resistance between vehicle body ground, R0 are known measuring resistance, the voltage between V1 battery packs anode and vehicle body ground, V1 '
Between battery pack anode and vehicle body ground after parallel resistance R0, the voltage between battery pack anode and vehicle body ground, V2 is battery
Voltage between packet cathode and vehicle body ground, V2 ' is between battery pack cathode and vehicle body ground after parallel resistance R0, battery pack cathode
With the voltage between vehicle body ground, R4, R5 are voltage divider circuit Resistance in voltage detecting circuit, and R6 is the internal resistance of ADC chips.
Assuming that Rc=R5 | | R6+R4, Rd=R0 | | Rc
After the partial pressure in view of Rc, the calculation formula that insulation resistance R1 and R2 can be calculated is as follows：
Actual test comparison is carried out to two methods by battery pack experiment, it is as a result as follows：
The insulation resistance provided in the related technology calculates precision：In the value range of 10k Ω~30k Ω, insulated electro
The computational accuracy of resistance is ± 1k Ω；In the value range of 30k Ω~1.1M Ω, the computational accuracy of insulation resistance is ± 18%.
The insulation resistance provided by the utility model wherein embodiment calculates precision：In taking for 10k Ω~30k Ω
It is worth in range, the computational accuracy of insulation resistance is ± 1k Ω；In the value range of 30k Ω~1.1M Ω, the meter of insulation resistance
It is ± 1% to calculate precision.
Compare above-mentioned data it is found that the internal resistance of voltage detecting circuit to computational accuracy, there are larger impacts.
Therefore, it in insulating monitoring calculating process, in order to ensure the precision of result of calculation, needs to voltage detecting circuit
Internal resistance is demarcated.The internal resistance of voltage detecting circuit may include the internal resistance of the resistance and ADC chips of bleeder circuit, wherein point
The resistance of volt circuit it is known that and the internal resistance value of ADC chips is unknown, bring above-mentioned formula calculating after being demarcated into.For this purpose,
In a wherein preferred embodiment provided by the utility model, correcting circuit is provided to demarcate the internal resistance value of ADC chips.Due to correction
Therefore the internal resistance value that circuit can not calibrate ADC chips when voltage detecting circuit is connect with insulation detecting circuit works as calibration
When the internal resistance value of ADC chips, voltage detecting circuit is first disconnected and being connect with the positive and negative anodes of insulation detecting circuit, then electric with correction again
Connection is established on road, and then is demarcated to the internal resistance value of ADC chips.
It should be noted that the normal value range of the internal resistance value of ADC chips needs the model by electric vehicle, using journey
The many indexs such as degree carry out Comprehensive Assessment.Once it is determined that the normal value range being adapted to current electric vehicle, then can pass through
Judge whether the internal resistance value of ADC chips is located at normal value range and then determines whether the internal resistance value of ADC chips is abnormal.Such as
Fruit determines that the internal resistance value of ADC chips is abnormal, then can pass through the devices such as instrument panel lamp on electric vehicle inner control panel
It issues the user with alarm or alarm is sent out to remote monitoring server by network, so that user and after-sale service are in time to electricity
Electrical automobile is overhauled.
Optionally, as shown in figure 3, foregoing circuit further includes：Correcting circuit 3；Correcting circuit 3 includes at least：The first branch
And the second branch；The first branch includes at least：First correction resistance R7, one end is coupled with the second divider resistance, another
It terminates into the first predeterminated voltage；The second branch includes at least：Second correction resistance R8, one end and the second divider resistance phase coupling
It closes, the other end accesses the second predeterminated voltage.
It should be noted that above-mentioned R7 and R8 are high-precision, interference-free resistance.
Optionally, the first predeterminated voltage is identical as the second predeterminated voltage.
Optionally, the first correction resistance is identical as the second correction resistance.
Specifically, in 5V=predetermined currents × (R5 | | R6+R4+R7), R5, R4 and R7 are it is known that it is possible thereby to count
Calculation obtains R6, the i.e. internal resistance value of ADC chips.In the internal resistance value that ADC chips are calculated and then by the first resistance value, second
The internal resistance value of resistance value and ADC chips seeks the initial resistance value (being equivalent to above-mentioned Rc) of voltage detecting circuit, and then is calculated
Insulation resistance R1 and R2.
Since the internal resistance value of voltage detecting circuit may change because of the problems such as environment temperature, aging, such as
Fruit is used only the resistance value after calibration once and carries out insulation resistance calculating, then the insulation resistance being calculated can be caused to lack accurate
True property, reliability will substantially reduce.In order to ensure the reliability being used for a long time, made within the set time by software mode
The internal resistance value of ADC chips is demarcated with correcting circuit, such as：It demarcates, demarcated every setting duration, the shops 4S when powering on
Calibration.
As shown in figure 3, R7 and R8 is resistance known to high-precision resistance value, and Rc=R5 | | R6+R4, K=R5/Rc.Work as switch
When connecting test point 3, it is V3 to measure and obtain the voltage of R5；When switch connection test point 4, it is V4 to measure and obtain the voltage of R5.
Therefore deduce that following calculation formula：
5V*Rc '/(Rc '+R7) * K=V3；
5V*Rc '/(Rc '+R8) * K=V4.
Following result can be obtained by calculating：
Rc '=(V4*R8-V3*R7)/V3-V4；
K=V3*R7* (V3-V4)/[(5*R8+V3) * V4- (5*R7+V3) * V3].
When internal resistance is changed due to temperature or aging, above-mentioned correcting circuit may be used and calculate Rc ' and be input to
In the calculation formula of above-mentioned R1 and R2, and then obtain insulation resistance R1 and R2.Voltage detecting circuit can be examined by switch connection
Measuring point 1 acquires the anode voltage over the ground of battery pack, and acquires the cathode of battery pack over the ground by switch connection test point 2
Voltage.Furthermore it is possible to using the voltage at the both ends ADC chips acquisition R5, voltage inspection is obtained in turn using the intrinsic standoff ratio of R5 and R4
The total voltage of slowdown monitoring circuit.Again since the situation of change between each resistance in voltage detecting circuit has differences, thus may lead
It causes the intrinsic standoff ratio of voltage detecting circuit to change, and then leads to the cathode of the positive voltage or battery pack over the ground of battery pack
Voltage over the ground changes.For this purpose, correcting circuit, which may be used, recalculates above-mentioned intrinsic standoff ratio K, to correct above-mentioned battery
The voltage value of the cathode of the positive voltage value and battery pack over the ground of packet over the ground.
It should be noted that by above-mentioned calculation formula if it find that the resistance value of insulation resistance is not in and current electronic vapour
The normal value range of vehicle adaptation can then be issued the user with by devices such as instrument panel lamps on electric vehicle inner control panel
Alarm sends out alarm by network to remote monitoring server, so that user and after-sale service in time carry out electric vehicle
Maintenance.In addition, it should also be noted that, in actual application, the value periodically to K is needed to recalculate, and
After calculating every time, newest obtained K values are fed back into BMS, to improve computational accuracy and the accuracy of insulation resistance.
According to the utility model wherein embodiment, a kind of battery management system is additionally provided, including：Above-mentioned battery pack is exhausted
Edge resistance detecting circuit.
According to the utility model wherein embodiment, a kind of electric vehicle is additionally provided, including：Above-mentioned battery management system
System.
Above-mentioned the utility model embodiment serial number is for illustration only, can not represent the quality of embodiment.
In above-described embodiment of the utility model, all emphasize particularly on different fields to the description of each embodiment, in some embodiment
The part not being described in detail may refer to the associated description of other embodiment.
The above is only the preferred embodiment of the utility model, it is noted that for the common skill of the art
For art personnel, without departing from the principle of this utility model, several improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (7)
1. a kind of battery pack insulating resistor detecting circuit, which is characterized in that including：Voltage detecting circuit, for accessing insulation inspection
Slowdown monitoring circuit, to measure the anode voltage value over the ground of battery pack and the cathode voltage value over the ground of the battery pack, and access
The voltage value of the positive voltage value over the ground of the battery pack and the cathode of the battery pack over the ground after preset resistance；
The voltage detecting circuit includes：
A-D converter ADC chips；
First divider resistance, it is in parallel with the ADC chips；
Second divider resistance is connected with first divider resistance；
Wherein, the initial resistance value of the voltage detecting circuit is by the internal resistance of the ADC chips, first divider resistance and institute
State the determination of the second divider resistance.
2. circuit according to claim 1, which is characterized in that the insulation detecting circuit includes：The battery pack,
In, the anode of the battery pack and the cathode of the battery pack are grounded respectively, and the positive internal resistance over the ground of the battery pack is equivalent
In the first insulation resistance, the internal resistance of the cathode of the battery pack over the ground is equivalent to the second insulation resistance.
3. circuit according to claim 1, which is characterized in that further include：Correcting circuit；
The correcting circuit includes at least：The first branch and the second branch；
The first branch includes at least：
First correction resistance, one end are coupled with second divider resistance, and the other end accesses the first predeterminated voltage；
The second branch includes at least：
Second correction resistance, one end are coupled with second divider resistance, and the other end accesses the second predeterminated voltage.
4. circuit according to claim 3, which is characterized in that first predeterminated voltage and the second predeterminated voltage phase
Together.
5. circuit according to claim 3, which is characterized in that the first correction resistance and the second correction resistance phase
Together.
6. a kind of battery management system, which is characterized in that including：Battery pack insulation described in any one of claim 1 to 5
Resistance detecting circuit.
7. a kind of electric vehicle, which is characterized in that including：Battery management system described in claim 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721663173.7U CN207662966U (en) | 2017-12-04 | 2017-12-04 | Battery pack insulating resistor detecting circuit, battery management system and electric vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721663173.7U CN207662966U (en) | 2017-12-04 | 2017-12-04 | Battery pack insulating resistor detecting circuit, battery management system and electric vehicle |
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| CN207662966U true CN207662966U (en) | 2018-07-27 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109239461A (en) * | 2018-09-29 | 2019-01-18 | 宝沃汽车（中国）有限公司 | The test method and system of the insulation resistance of electric car |
| CN109633240A (en) * | 2018-12-29 | 2019-04-16 | 蜂巢能源科技有限公司 | Power battery pack voltage detection method and device |
| CN110161394A (en) * | 2019-07-04 | 2019-08-23 | 苏州妙益科技股份有限公司 | A kind of insulation detecting method based on Unscented kalman filtering |
| CN110187180A (en) * | 2019-06-17 | 2019-08-30 | 杭州神驹科技有限公司 | A kind of detection method of vehicle resistance value |
| CN111044768A (en) * | 2018-10-15 | 2020-04-21 | 大陆汽车有限责任公司 | Method for operating a current sensor and current sensor |
| CN111781424A (en) * | 2020-07-14 | 2020-10-16 | 中国第一汽车股份有限公司 | Method and device for measuring insulation resistance of electric vehicle, vehicle and storage medium |
| CN112014641A (en) * | 2019-05-28 | 2020-12-01 | 北京新能源汽车股份有限公司 | Method and device for testing finished automobile insulation resistance detection precision of electric automobile |
| CN117434408A (en) * | 2023-12-15 | 2024-01-23 | 珠海科创储能科技有限公司 | Battery insulation detection circuit, method and device, storage medium and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109239461A (en) * | 2018-09-29 | 2019-01-18 | 宝沃汽车（中国）有限公司 | The test method and system of the insulation resistance of electric car |
| CN109239461B (en) * | 2018-09-29 | 2021-05-14 | 宝沃汽车（中国）有限公司 | Method and system for testing insulation resistance of electric automobile |
| CN111044768A (en) * | 2018-10-15 | 2020-04-21 | 大陆汽车有限责任公司 | Method for operating a current sensor and current sensor |
| CN109633240A (en) * | 2018-12-29 | 2019-04-16 | 蜂巢能源科技有限公司 | Power battery pack voltage detection method and device |
| CN112014641A (en) * | 2019-05-28 | 2020-12-01 | 北京新能源汽车股份有限公司 | Method and device for testing finished automobile insulation resistance detection precision of electric automobile |
| CN112014641B (en) * | 2019-05-28 | 2023-09-15 | 北京新能源汽车股份有限公司 | Method and device for testing insulation resistance detection precision of whole electric automobile |
| CN110187180A (en) * | 2019-06-17 | 2019-08-30 | 杭州神驹科技有限公司 | A kind of detection method of vehicle resistance value |
| CN110187180B (en) * | 2019-06-17 | 2022-01-07 | 杭州神驹科技有限公司 | Method for detecting vehicle resistance value |
| CN110161394A (en) * | 2019-07-04 | 2019-08-23 | 苏州妙益科技股份有限公司 | A kind of insulation detecting method based on Unscented kalman filtering |
| CN111781424A (en) * | 2020-07-14 | 2020-10-16 | 中国第一汽车股份有限公司 | Method and device for measuring insulation resistance of electric vehicle, vehicle and storage medium |
| CN111781424B (en) * | 2020-07-14 | 2023-03-24 | 中国第一汽车股份有限公司 | Method and device for measuring insulation resistance of electric vehicle, vehicle and storage medium |
| CN117434408A (en) * | 2023-12-15 | 2024-01-23 | 珠海科创储能科技有限公司 | Battery insulation detection circuit, method and device, storage medium and electronic equipment |
| CN117434408B (en) * | 2023-12-15 | 2024-03-29 | 珠海科创储能科技有限公司 | Battery insulation detection circuit, method and device, storage medium and electronic equipment |
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