CN108107274A - Modified pure electric automobile multiple spot electric leakage insulation resistance on-line monitoring system and method - Google Patents
Modified pure electric automobile multiple spot electric leakage insulation resistance on-line monitoring system and method Download PDFInfo
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- CN108107274A CN108107274A CN201810125197.XA CN201810125197A CN108107274A CN 108107274 A CN108107274 A CN 108107274A CN 201810125197 A CN201810125197 A CN 201810125197A CN 108107274 A CN108107274 A CN 108107274A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of modified pure electric automobile multiple spot electric leakage insulation resistance on-line monitoring system and method, realizes the monitoring of system insulating resistance R by the logic control of MCU master controls using the insulating monitoring equipment of bridge method and the insulation module of signal injection method；Using the accurate detecting system power loop any point leak resistance of signal injection method, and the report and alarm of failure is carried out according to warning value, after fault warning generation, the leak resistance of anode and negative terminal is further detected by bridge method, and completes reporting for insulation resistance value and failure on request.The system insulation resistance value of power-supply system power loop arbitrary point can be realized by the method for the present invention, and further the insulation resistance value of power-supply system anode and negative terminal is detected by this method when insulation fault occurs and reports vehicle VCU control systems.
Description
Technical field
The present invention relates to electric automobile insulation security fields, leak electricity more particularly to a kind of modified pure electric automobile multiple spot
Insulation resistance on-line monitoring system and method.
Background technology
As new energy industry as strategic industry obtains vigorously supporting in government policy, the production of China's new-energy automobile
Sales volume becomes the first in the world, marches at the forefront of the world.But with the increase of the market amount of having, the safety problem of electrokinetic cell system
The bottleneck for restricting new energy and Development of Electric Vehicles is increasingly becoming, develops safe and reliable, cost-effective electrokinetic cell system
It is the problem that must be solved that next stage China's Development of Electric Vehicles is faced.A weight as power-supply system electrical safety
Component is wanted, how timely and effectively to find the leak current fault of system, for quickly eliminating vehicle safety hidden danger, realizes the person
Security protection has a very important significance.
Currently on the market for electric vehicle power sources system insulating resistance monitoring there are mainly two types of method.
First method is bridge method, as shown in Figure 1.The measurement side with reference to described in 5.1.3 in GB/T 18384.1-2015
Method.Before and after sampling resistor is incorporated to system, respectively measurement it is main just and main negative electrode over the ground between voltage, by Ohm's law from
And calculate the insulation resistance of system.But it can not effectively be monitored for situations below：
1) what multiple spot electric leakage occurred in internal system (single battery core) and vehicle for power-supply system power loop can not be into
The effective accurate measurements of row；
2) feelings are grounded to the impartial decline of level platform insulation resistance or its similar symmetry D.C. resistance to positive and negative busbar
Insulation measurement under condition, insulation fault monitoring.
Second method is signal injection method, as shown in Figure 2.Its operation principle is in system dynamic circuit by driving source
Measuring signal is injected between vehicle level platform.MCU Main Processing Unit is by measuring the voltage on sampling resistor resistance Rm, into line number
It analyzes, filter according to sampling processing, carry out complicated mathematical operation, calculate the size of system insulating resistance.MCU can be defeated by DO
Go out alarm signal or corresponding insulating resistance value and fault level are sent by CAN network.The advantages of this method is can be accurate
Monitoring power-supply system power loop exchange side and DC side any point position (including single battery) insulation against ground level reduces
Failure, shortcoming are can not individually to report battery anode end "+" battery electrode end "-" is to electricity to level platform insulation resistance Rp
Platform insulation resistance Rn, during multiple spot leak current fault can reporting system insulation against ground resistance, the independent electric leakage of each point of None- identified
Resistance and specific location.
The content of the invention
It is an object of the invention to propose a kind of insulated monitoring method, power-supply system any point insulation resistance value can be monitored on-line
Variation, when insulation resistance value drops to below safety value, further identification judge so that it is determined that failure rank and positive and negative anodes leakage
The relative position of electricity.
In order to achieve the above objectives, the present invention uses implemented below scheme：
A kind of modified pure electric automobile multiple spot leaks electricity insulation resistance on-line monitoring system, including BMS, battery pack system,
Communication module and signal injection method insulating monitoring module, the BMS include MCU master controls and BMS insulating monitoring modules, the battery
System system is connected respectively with BMS insulating monitorings module and signal injection method insulating monitoring module, and the MCU master controls and BMS are exhausted
Edge monitoring modular is connected with signal injection method insulating monitoring module, and the MCU master controls and signal injection method insulating monitoring module
It is communicated by communication module, realizes that BMS insulating monitorings module and signal injection method insulate by the logic control of MCU master controls
Monitoring of the monitoring modular to battery pack system insulation resistance.
Specifically, the BMS insulating monitorings module includes detection resistance R1 and R2, PLC technology switch S1 and S2, institute
It states PLC technology switch S1 and detection resistance R1 to be connected between the anode of battery pack system and the level platform of electric vehicle, institute
PLC technology switch S2 and detection resistance R2 is stated to be connected between the cathode of battery pack system and the level platform of electric vehicle.
It is described possess insulation-monitoring function BMS as main control unit be responsible for insulated monitoring method flow realize, possess CAN
Communication message sends and receivees function, and insulation-monitoring function is realized using bridge method, is just being born for battery pack system master with main
Between voltage acquisition circuit must have two PLC technologies of S1, S2 switch, it is total just to switch S1, S2 control by PLC technology
And voltage acquisition between always bearing.
Specifically, the signal injection method insulating monitoring module includes driving source, sampling resistor Rm, PLC technology switch
S3 and S4, detection resistance R3 and R4, the PLC technology switch the anode that S3 and detection resistance R3 is connected on battery pack system
Between sampling resistor Rm, the PLC technology switch S4 and detection resistance R4 is connected on cathode and the sampling of battery pack system
Between resistance Rm, the driving source is connected between the level platform of electric vehicle and sampling resistor Rm exits.Wherein, it is described to swash
The source of encouraging is the sine wave or square-wave voltage source signal being applied between power-supply system and level platform on insulation resistance.
Signal injection method insulating monitoring module by measurand battery pack system apply pumping signal, while to feedback
Signal carries out data sampling processing analysis, carries out complicated mathematical operation, calculates the variation of battery pack system insulation resistance.
BMS controls the working condition of signal injection method insulating monitoring module by the realization of CAN communication message.As control bit m=1
When, the response of signal injection method insulation module is closed S3, S4, opens BMS insulation-monitoring functions；As control bit m=0, signal note
Enter the response of method insulation module and stop insulation-monitoring function, disconnect S3, S4 switch.
Specifically, the communication module is CAN communication module.Using CAN protocol, its major function is to realize BMS and signal
Communication Control and data-transformation facility between injection method insulating monitoring module.In addition to CAN, other communication protocols can also be used
Realize the communication mode for describing to realize identical function with the application.
A kind of modified pure electric automobile multiple spot electric leakage insulation resistance on-line monitoring method, comprises the following steps：Using electricity
The insulating monitoring equipment of bridge method and the insulation module of signal injection method realize system insulating resistance by the logic control of MCU master controls
Monitoring；
First, monitoring and judgement to battery pack system any point insulation resistance R is realized by signal injection method, according to
The requirement of GB/T 18384.1-2015 carries out timely alarm and reminds, and easy access is safeguarded, and slight alarm is arranged to generally accuse
Alert value, high severity alarm are arranged to high severity alarm value；When the resistance value for monitoring battery pack system insulation resistance R is less than minor alarm value
It is required that when, it carries out generic failure alarm and reports the resistance value of insulation resistance R；When the resistance for monitoring battery pack system insulation resistance R
When value is less than high severity alarm value, MCU master controls control stop signal injection method insulating monitoring module uses BMS insulating monitoring modules instead
Bridge method monitor battery anode end "+" to the insulation resistance Rp and battery electrode end "-" of level platform to the exhausted of level platform
Edge resistance Rn.
It is provided according to " 5.1.4 requirements " in GB/T 18384.1-2015, the friendship such as DC loop or using additional protection
Road is flowed back to, minimum insulation resistance value does not allow to be less than 100 Ω/V；Regulation such as comprising ac circuit and no additional protection, then this
Value is not less than 500 Ω/V.Work out suitable alarm threshold according to electric car ac circuit protection situation, be such as DC loop or
Using the alternating current of additional protection, general warning value is set to 500 Ω/V, and high severity alarm is arranged to 100 Ω/V；Such as comprising friendship
Road and no additional protection are flowed back to, general warning value is set to 1000 Ω/V, and high severity alarm is arranged to 500 Ω/V.
It concretely comprises the following steps,
1) BMS power-on self-tests, self-test state is normal, disconnects PLC technology switch S1, S2, passes through CAN communication module control
Signal injection method insulating monitoring module work processed, performs step 2)；
2) the MCU master controls of BMS are controlled by CAN communication module is closed PLC technology switch S3, S4, open signal injection
Method insulation-monitoring function；Voltage value on sampling resistor Rm is measured by MCU master controls, calculates battery pack system insulation resistance R,
And judge battery pack system insulation resistance R whether be less than minor alarm value requirement, according to GB/T 18384.1-2015 require into
Row is following to be judged, if battery pack system insulation resistance R ＜ minor alarm values, perform step 3), otherwise persistently judged；
3) if MCU master controls monitor battery pack system insulation resistance R ＜ high severity alarm values, step 4) is performed, otherwise
It reports " insulation level fault " or reports insulation resistance value R or failure by the requirement in electric vehicle VCU communications protocol；
4) BMS disconnects PLC technology by CAN communication module control signal injection method insulating monitoring module from service
S3, S4 are switched, PLC technology switch S1, S2 is closed, opens BMS insulation-monitoring functions, perform step 5)；
5) the voltage U1 and U2 at MCU master controls difference acquisition testing resistance R1 and R2 both ends, is switched on-off by S1, S2,
Measurement obtains the voltage value of R1, R2 both ends different U1 and U2, and then battery anode end "+" is calculated to the exhausted of level platform
Edge resistance Rp and battery electrode end "-" judge battery anode end "+" to level platform the insulation resistance Rn of level platform
Insulation resistance Rp and battery electrode end "-" such as meet " Rp to the insulation resistance Rn of level platform and the relation of high severity alarm value<
Grave warning value " or " Rn<Grave warning value " then reports " insulation secondary failure " or by electric vehicle VCU communications protocol
It is required that reporting insulation resistance value Rp, Rn or failure, and stop the work of electric vehicle power sources system, otherwise return and perform step 2).
The battery pack system describes to should be at channel status in the insulated monitoring method course of work in this application.Using
Signal injection method possesses the wake-up open function that communicates, voltage between just and always being born using PLC technology switch S3, S4 control is total
The acquisition of U1, U2.Level platform refers to the ground of electric vehicle.
The beneficial effects of the invention are as follows：A kind of modified pure electric automobile multiple spot electric leakage insulation resistance provided by the invention exists
Line monitoring system and method, using signal injection method accurate measurements system dynamic circuit any point leak resistance, and according to alarm
Value carries out the report and alarm of failure, and after fault warning generation, the electric leakage electricity of anode and negative terminal is further detected by bridge method
Resistance is how many respectively, carries out reporting for insulation resistance value and failure as requested, can realize that power-supply system is moved by the method for the present invention
The system insulation resistance value of power circuit arbitrary point, and when insulation fault occurs by this method further to power-supply system anode
It is detected with the insulation resistance value of negative terminal and reports vehicle VCU control systems.Compared with bridge method, bridge method can not realize power supply
System multiple spot leaks electricity and the accurate detection of power-supply system internal electrical losses failure, by present method solves problem above, it can be achieved that
The insulation resistance of power loop arbitrary point or system detects；Compared with signal injection method, signal injection method can only detecting system it is exhausted
Edge resistance value by the detection of this method not only feasible system insulation resistance, can also realize power-supply system anode and negative terminal insulation
The further detection of resistance confirms, the wrong report of insulation fault is avoided to fail to report.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the principle schematic of bridge method insulating monitoring in the prior art；
Fig. 2 is the principle schematic of signal injection method insulating monitoring in the prior art；
Fig. 3 is the principle schematic that insulated monitoring method of the present invention is realized；
Fig. 4 is the flow chart that insulated monitoring method of the present invention is realized.
Specific embodiment
Presently in connection with attached drawing, the present invention is described in detail.This figure is simplified schematic diagram, is only illustrated in a schematic way
The basic structure of the present invention, therefore it only shows composition related to the present invention.
As shown in figure 3, a kind of modified pure electric automobile multiple spot electric leakage insulation resistance on-line monitoring system, including BMS, electricity
Pond system system, communication module and signal injection method insulating monitoring module, the BMS include MCU master controls and BMS insulating monitoring moulds
Block, the battery pack system is connected respectively with BMS insulating monitorings module and signal injection method insulating monitoring module, and the MCU
Master control is connected with BMS insulating monitorings module and signal injection method insulating monitoring module, and the MCU master controls and signal injection method are exhausted
Edge monitoring modular is communicated by communication module, and BMS insulating monitorings module and signal are realized by the logic control of MCU master controls
Monitoring of the injection method insulating monitoring module to battery pack system insulation resistance.
Specifically, the BMS insulating monitorings module includes detection resistance R1 and R2, PLC technology switch S1 and S2, institute
It states PLC technology switch S1 and detection resistance R1 to be connected between the anode of battery pack system and the level platform of electric vehicle, institute
PLC technology switch S2 and detection resistance R2 is stated to be connected between the cathode of battery pack system and the level platform of electric vehicle.
It is described possess insulation-monitoring function BMS as main control unit be responsible for insulated monitoring method flow realize, possess CAN
Communication message sends and receivees function, and insulation-monitoring function is realized using bridge method, is just being born for battery pack system master with main
Between voltage acquisition circuit must have two PLC technologies of S1, S2 switch, it is total just to switch S1, S2 control by PLC technology
And voltage acquisition between always bearing.
Specifically, the signal injection method insulating monitoring module includes driving source, sampling resistor Rm, PLC technology switch
S3 and S4, detection resistance R3 and R4, the PLC technology switch the anode that S3 and detection resistance R3 is connected on battery pack system
Between sampling resistor Rm, the PLC technology switch S4 and detection resistance R4 is connected on cathode and the sampling of battery pack system
Between resistance Rm, the driving source is connected between the level platform of electric vehicle and sampling resistor Rm exits.Wherein, it is described to swash
The source of encouraging is the sine wave or square-wave voltage source signal being applied between power-supply system and level platform on insulation resistance.
Signal injection method insulating monitoring module by measurand battery pack system apply pumping signal, while to feedback
Signal carries out data sampling processing analysis, carries out complicated mathematical operation, calculates the variation of battery pack system insulation resistance.
BMS controls the working condition of signal injection method insulating monitoring module by the realization of CAN communication message.As control bit m=1
When, the response of signal injection method insulation module is closed S3, S4, opens BMS insulation-monitoring functions；As control bit m=0, signal note
Enter the response of method insulation module and stop insulation-monitoring function, disconnect S3, S4 switch.
Specifically, the communication module is CAN communication module.Using CAN protocol, its major function is to realize BMS and signal
Communication Control and data-transformation facility between injection method insulating monitoring module.In addition to CAN, other communication protocols can also be used
Realize the communication mode for describing to realize identical function with the application.
As shown in figure 4, a kind of modified pure electric automobile multiple spot electric leakage insulation resistance on-line monitoring method, including following step
Suddenly：System is realized by the logic control of MCU master controls using the insulating monitoring equipment of bridge method and the insulation module of signal injection method
The monitoring of system insulation resistance；
First, monitoring and judgement to battery pack system any point insulation resistance R is realized by signal injection method, according to
The requirement of GB/T 18384.1-2015 carries out timely alarm and reminds, and easy access is safeguarded, and slight alarm is arranged to generally accuse
Alert value, high severity alarm are arranged to high severity alarm value；When the resistance value for monitoring battery pack system insulation resistance R is less than minor alarm value
It is required that when, it carries out generic failure alarm and reports the resistance value of insulation resistance R；When the resistance for monitoring battery pack system insulation resistance R
When value is less than high severity alarm value, MCU master controls control stop signal injection method insulating monitoring module uses BMS insulating monitoring modules instead
Bridge method monitor battery anode end "+" to the insulation resistance Rp and battery electrode end "-" of level platform to the exhausted of level platform
Edge resistance Rn.
It is provided according to " 5.1.4 requirements " in GB/T 18384.1-2015, the friendship such as DC loop or using additional protection
Road is flowed back to, minimum insulation resistance value does not allow to be less than 100 Ω/V；Regulation such as comprising ac circuit and no additional protection, then this
Value is not less than 500 Ω/V.Work out suitable alarm threshold according to electric car ac circuit protection situation, be such as DC loop or
Using the alternating current of additional protection, general warning value is set to 500 Ω/V, and high severity alarm is arranged to 100 Ω/V；Such as comprising friendship
Road and no additional protection are flowed back to, general warning value is set to 1000 Ω/V, and high severity alarm is arranged to 500 Ω/V.
It concretely comprises the following steps,
1) BMS power-on self-tests, self-test state is normal, disconnects PLC technology switch S1, S2, passes through CAN communication module control
Signal injection method insulating monitoring module work processed, performs step 2)；
2) the MCU master controls of BMS are controlled by CAN communication module is closed PLC technology switch S3, S4, open signal injection
Method insulation-monitoring function；Voltage value on sampling resistor Rm is measured by MCU master controls, calculates battery pack system insulation resistance R,
And judge battery pack system insulation resistance R whether be less than minor alarm value requirement, according to GB/T 18384.1-2015 require into
Row is following to be judged, if battery pack system insulation resistance R ＜ minor alarm values, perform step 3), otherwise persistently judged；
3) if MCU master controls monitor battery pack system insulation resistance R ＜ high severity alarm values, step 4) is performed, otherwise
It reports " insulation level fault " or reports insulation resistance value R or failure by the requirement in electric vehicle VCU communications protocol；
4) BMS disconnects PLC technology by CAN communication module control signal injection method insulating monitoring module from service
S3, S4 are switched, PLC technology switch S1, S2 is closed, opens BMS insulation-monitoring functions, perform step 5)；
5) the voltage U1 and U2 at MCU master controls difference acquisition testing resistance R1 and R2 both ends, is switched on-off by S1, S2,
Measurement obtains the voltage value of R1, R2 both ends different U1 and U2, and then battery anode end "+" is calculated to the exhausted of level platform
Edge resistance Rp and battery electrode end "-" judge battery anode end "+" to level platform the insulation resistance Rn of level platform
Insulation resistance Rp and battery electrode end "-" such as meet " Rp to the insulation resistance Rn of level platform and the relation of high severity alarm value<
Grave warning value " or " Rn<Grave warning value " then reports " insulation secondary failure " or by electric vehicle VCU communications protocol
It is required that reporting insulation resistance value Rp, Rn or failure, and stop the work of electric vehicle power sources system, otherwise return and perform step 2).
The battery pack system describes to should be at channel status in the insulated monitoring method course of work in this application.Using
Signal injection method possesses the wake-up open function that communicates, voltage between just and always being born using PLC technology switch S3, S4 control is total
The acquisition of U1, U2.BMS controls the working condition of signal injection method insulating monitoring module by the realization of CAN communication message.
As control bit m=1, the response of signal injection method insulation module is closed S3, S4, opens BMS insulation-monitoring functions；As control bit m
When=0, the response of signal injection method insulation module stops insulation-monitoring function, disconnects PLC technology switch S3, S4.
Using above-mentioned desirable embodiment according to the invention as enlightenment, by above-mentioned description, relevant staff
Various changes and amendments can be carried out in without departing from the scope of the present invention completely.The technical scope of this invention is not
The content being confined on specification, it is necessary to which its technical scope is determined according to right.
Claims (6)
- The insulation resistance on-line monitoring system 1. a kind of modified pure electric automobile multiple spot leaks electricity, it is characterised in that：Including BMS, electricity Pond system system, communication module and signal injection method insulating monitoring module, the BMS include MCU master controls and BMS insulating monitoring moulds Block, the battery pack system is connected respectively with BMS insulating monitorings module and signal injection method insulating monitoring module, and the MCU Master control is connected with BMS insulating monitorings module and signal injection method insulating monitoring module, and the MCU master controls and signal injection method are exhausted Edge monitoring modular is communicated by communication module, and BMS insulating monitorings module and signal are realized by the logic control of MCU master controls Monitoring of the injection method insulating monitoring module to battery pack system insulation resistance.
- The insulation resistance on-line monitoring system 2. modified pure electric automobile multiple spot as described in claim 1 leaks electricity, feature exist In：The BMS insulating monitorings module includes detection resistance R1 and R2, PLC technology switch S1 and S2, the PLC technology Switch S1 and detection resistance R1 is connected between the anode of battery pack system and the level platform of electric vehicle, the PLC technology Switch S2 and detection resistance R2 is connected between the cathode of battery pack system and the level platform of electric vehicle.
- The insulation resistance on-line monitoring system 3. modified pure electric automobile multiple spot as claimed in claim 2 leaks electricity, feature exist In：The signal injection method insulating monitoring module includes driving source, sampling resistor Rm, PLC technology switch S3 and S4, detection Resistance R3 and R4, the PLC technology switch S3 and detection resistance R3 and are connected on the anode of battery pack system and sampling resistor Rm Between, the PLC technology switch S4 and detection resistance R4 is connected between the cathode of battery pack system and sampling resistor Rm, The driving source is connected between the level platform of electric vehicle and sampling resistor Rm exits.
- The insulation resistance on-line monitoring system 4. modified pure electric automobile multiple spot as claimed in claim 3 leaks electricity, feature exist In：The communication module is CAN communication module.
- The insulation resistance on-line monitoring method 5. a kind of modified pure electric automobile multiple spot leaks electricity, it is characterised in that：Including following step Suddenly：System is realized by the logic control of MCU master controls using the insulating monitoring equipment of bridge method and the insulation module of signal injection method The monitoring of system insulation resistance；First, the monitoring and judgement of battery pack system any point insulation resistance R is realized by signal injection method, according to GB/T The requirement of 18384.1-2015 carries out timely alarm and reminds, and easy access is safeguarded, and slight alarm is arranged to minor alarm value, High severity alarm is arranged to high severity alarm value；When the resistance value for monitoring battery pack system insulation resistance R is required less than minor alarm value When, it carries out generic failure alarm and reports the resistance value of insulation resistance R；When the resistance value for monitoring battery pack system insulation resistance R is low When high severity alarm value, MCU master controls control stop signal injection method insulating monitoring module, use the electricity of BMS insulating monitoring modules instead Bridge method monitors insulated electro of the battery anode end "+" to the insulation resistance Rp of level platform and battery electrode end "-" to level platform Hinder Rn.
- The insulation resistance on-line monitoring method 6. modified pure electric automobile multiple spot as claimed in claim 5 leaks electricity, feature exist In：It concretely comprises the following steps,1) BMS power-on self-tests, self-test state is normal, disconnects and switchs S1, S2, exhausted by CAN communication module control signal injection method Edge monitoring modular works, and performs step 2)；2) the MCU master controls of BMS are controlled by CAN communication module is closed PLC technology switch S3, S4, and open signal injection method is exhausted Edge monitoring function；Voltage value on sampling resistor Rm is measured by MCU master controls, battery pack system insulation resistance R is calculated, and sentences Whether disconnected battery pack system insulation resistance R is less than the requirement of minor alarm value, if battery pack system insulation resistance R ＜ are generally accused Alert value, then perform step 3), otherwise persistently judged；3) if MCU master controls monitor battery pack system insulation resistance R ＜ high severity alarm values, step 4) is performed, is otherwise reported " insulation level fault " or report insulation resistance value R or failure by the requirement in electric vehicle VCU communications protocol；4) BMS disconnects PLC technology switch by CAN communication module control signal injection method insulating monitoring module from service S3, S4 are closed PLC technology switch S1, S2, open BMS insulation-monitoring functions, perform step 5)；5) the voltage U1 and U2 at MCU master controls difference acquisition testing resistance R1 and R2 both ends, is switched on-off by S1, S2, is measured The voltage value of R1, R2 both ends different U1 and U2 are obtained, and then insulated electro of the battery anode end "+" to level platform is calculated The insulation resistance Rn of Rp and battery electrode end "-" to level platform is hindered, and judges insulation of the battery anode end "+" to level platform Resistance Rp and battery electrode end "-" such as meet " Rp to the insulation resistance Rn of level platform and the relation of high severity alarm value<Seriously Warning value " or " Rn<Grave warning value " then reports " insulation secondary failure " or by the requirement in electric vehicle VCU communications protocol Insulation resistance value Rp, Rn or failure are reported, and stops the work of electric vehicle power sources system, otherwise returns and performs step 2).
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| CN108680793A (en) * | 2018-07-10 | 2018-10-19 | 天津职业技术师范大学 | A kind of pure electric automobile insulating resistor detecting circuit and its detection method |
| CN109116281A (en) * | 2018-09-25 | 2019-01-01 | 北京长城华冠汽车科技股份有限公司 | A kind of diagnostic system and method for batteries of electric automobile group insulating resistor detecting circuit |
| CN109435693A (en) * | 2018-10-11 | 2019-03-08 | 恒大法拉第未来智能汽车（广东）有限公司 | Electric automobile insulation failure monitoring method and device |
| CN109444549A (en) * | 2018-10-24 | 2019-03-08 | 宁波普瑞均胜汽车电子有限公司 | A kind of quick detection circuit and method of vehicle body insulation |
| CN110568377A (en) * | 2019-09-25 | 2019-12-13 | 北京动力源新能源科技有限责任公司 | Battery system insulation detection device |
| CN110707386A (en) * | 2019-11-20 | 2020-01-17 | 桑顿新能源科技有限公司 | Battery pack, detection method and detection device for electric leakage position point of battery pack and vehicle |
| CN111103508A (en) * | 2018-10-26 | 2020-05-05 | 上海汽车集团股份有限公司 | Single-point insulation fault positioning calculation method and system |
| CN111796204A (en) * | 2020-06-08 | 2020-10-20 | 力高(山东)新能源技术有限公司 | Method and system for judging voltage stability of new energy automobile by small signal insulation detection |
| CN111948504A (en) * | 2020-08-25 | 2020-11-17 | 的卢技术有限公司 | 800V energy storage system insulation detection circuit and method |
| WO2021197437A1 (en) * | 2020-04-02 | 2021-10-07 | 长城汽车股份有限公司 | Insulation fault response method and apparatus for fuel cell vehicle |
| WO2023155049A1 (en) * | 2022-02-15 | 2023-08-24 | Abb Schweiz Ag | Device for detecting ground faults and electrical system |
| CN117991062A (en) * | 2024-04-03 | 2024-05-07 | 江苏英拓动力科技有限公司 | Insulation detection method for multi-machine grid connection of micro-grid |
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| CN109444549A (en) * | 2018-10-24 | 2019-03-08 | 宁波普瑞均胜汽车电子有限公司 | A kind of quick detection circuit and method of vehicle body insulation |
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| CN117991062A (en) * | 2024-04-03 | 2024-05-07 | 江苏英拓动力科技有限公司 | Insulation detection method for multi-machine grid connection of micro-grid |
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