CN107490750A - Electric vehicle and its insulation detecting method, device and system - Google Patents

Electric vehicle and its insulation detecting method, device and system Download PDF

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Publication number
CN107490750A
CN107490750A CN201610921744.6A CN201610921744A CN107490750A CN 107490750 A CN107490750 A CN 107490750A CN 201610921744 A CN201610921744 A CN 201610921744A CN 107490750 A CN107490750 A CN 107490750A
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CN
China
Prior art keywords
relay
insulation
diagnostic equipment
insulation monitoring
resistance value
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CN201610921744.6A
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Chinese (zh)
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CN107490750B (en
Inventor
宋宗南
侯晓翔
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宝沃汽车(中国)有限公司
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Priority to CN201610921744.6A priority Critical patent/CN107490750B/en
Publication of CN107490750A publication Critical patent/CN107490750A/en
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Publication of CN107490750B publication Critical patent/CN107490750B/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/025Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters

Abstract

The invention discloses a kind of electric vehicle and its insulation detecting method, device and system.Wherein, this method includes:The close command that diagnostic equipment is sent is received, wherein, the first relay or the second relay that close command is used for inside the battery bag of indicating closing electric vehicle;After close command is performed, corresponding resistance value after the first relay of reading or the second relay closure;Detect whether corresponding resistance value meets default insulation conditions, obtain Insulation monitoring result;Insulation monitoring result is back to diagnostic equipment.The insulation detecting method that the present invention solves existing electric vehicle is the insulaion resistance for detecting electric vehicle on electric vehicle after high pressure by battery management system, easily causes the technical problem that personnel get an electric shock and high voltage component damages.

Description

Electric vehicle and its insulation detecting method, device and system

Technical field

The present invention relates to electric vehicle field, in particular to a kind of electric vehicle and its insulation detecting method, device And system.

Background technology

After vehicle is offline, to prevent that personnel from getting an electric shock, high voltage component damages caused by insulation fault, it need to be insulated by vehicle Detection, upper high pressure action is performed after confirming naked failure.The artificial method for playing insulation can be used to carry out vehicle Insulation monitoring, The method need to disconnect high-voltage connector after the offline assembling of vehicle, recover again after detection to former car state, cumbersome multiple Miscellaneous, man-hour is longer.

Battery management system (BMS, Battery Management System's writes a Chinese character in simplified form) inside battery bag has insulation Diagnostic function, BMS can also be used to monitor the state of insulation of high-pressure system in real time.Feelings of the existing detection scheme in upper (ON) electricity Under condition, the positive relay of master, main negative relay inside battery bag do not close, and BMS can only detect battery bag internal cell module To the positive relay of master, main negative relay part to level platform insulaion resistance, it is impossible to vehicle positive and negative electrode is detected before upper high pressure to electricity Platform insulaion resistance, in execution after operation with high pressure, after the positive relay of master, main negative relay closure inside battery bag, BMS detections Vehicle positive and negative electrode is to level platform insulaion resistance, and BMS sends lower high pressure action when having detected insulation fault.When vehicle exist it is whole During car insulation safety risk, this scheme may cause personnel to get an electric shock, high voltage parts are damaged etc..

Insulation detecting method for existing electric vehicle is on electric vehicle after high pressure, passes through battery management system System detection electric vehicle insulaion resistance, easily cause personnel get an electric shock and high voltage component damage the problem of, not yet propose at present Effective solution.

The content of the invention

The embodiments of the invention provide a kind of electric vehicle and its insulation detecting method, device and system, at least to solve The insulation detecting method of existing electric vehicle is on electric vehicle after high pressure, and electric car is detected by battery management system Insulaion resistance, easily cause personnel get an electric shock and high voltage component damage technical problem.

One side according to embodiments of the present invention, there is provided a kind of insulation detecting method of electric vehicle, including:Receive The close command that diagnostic equipment is sent, wherein, the first relay that close command is used for inside the battery bag of indicating closing electric vehicle Device or the second relay;It is corresponding after the first relay of reading or the second relay closure after close command is performed Resistance value;Detect whether corresponding resistance value meets default insulation conditions, obtain Insulation monitoring result;By Insulation monitoring knot Fruit is back to diagnostic equipment.

Further, judge whether corresponding resistance value meets default insulation conditions, obtain Insulation monitoring result, wrap Include:Obtain preset threshold range corresponding to corresponding resistance value;Judge whether corresponding resistance value is in predetermined threshold value model Within enclosing;If corresponding resistance value is within preset threshold range, it is determined that Insulation monitoring result is led to for Insulation monitoring Cross;If corresponding resistance value is in outside preset threshold range, it is determined that Insulation monitoring result is that Insulation monitoring does not pass through.

Further, detecting whether corresponding resistance value meets default insulation conditions, obtain Insulation monitoring result it Afterwards, the above method also includes:After open command is performed, feedback of status is generated;Feedback of status is back to diagnostic equipment;Its In, diagnostic equipment judges whether to receive feedback of status, if receiving feedback of status, diagnostic equipment judges whether Insulation monitoring is complete Into;If Insulation monitoring does not complete, diagnostic equipment sends close command;If Insulation monitoring is completed, diagnostic equipment output insulation Testing result.

Further, if non-reception state is fed back, diagnostic equipment stops Insulation monitoring, and exports fault message.

Further, before the close command that diagnostic equipment is sent is received, the above method also includes:It is electric on electric vehicle Afterwards, detection battery bag whether there is insulation fault, and the first relay and the second relay whether there is adhesion fault;Such as Fruit detects that insulation fault is not present in battery bag, and adhesion fault is not present in the first relay and the second relay, then enters and connect The step of receiving the close command that diagnostic equipment is sent.

Another aspect according to embodiments of the present invention, a kind of insulation detection device of electric vehicle is additionally provided, including:The One receiving module, for receiving the close command of diagnostic equipment transmission, wherein, close command is used for the electricity of indicating closing electric vehicle The first relay or the second relay inside the bag of pond;Read module, for after close command is performed, read first after Corresponding resistance value after electrical equipment or the second relay closure;First detection module, it is for detecting corresponding resistance value It is no to meet default insulation conditions, obtain Insulation monitoring result;First returns to module, for Insulation monitoring result to be back into diagnosis Instrument.

Further, first detection module includes:Acquisition submodule, preset for obtaining corresponding to corresponding resistance value Threshold range;Judging submodule, for judging corresponding resistance value whether within preset threshold range;First processing Module, if be in for corresponding resistance value within preset threshold range, it is determined that Insulation monitoring result is Insulation monitoring Pass through;Second processing submodule, if be in for corresponding resistance value outside preset threshold range, it is determined that Insulation monitoring As a result do not pass through for Insulation monitoring.

Further, said apparatus also includes:Second receiving module, for receiving the open command of diagnostic equipment transmission, its In, open command is used to indicate to disconnect the relay after closure;Generation module, after open command is performed, generation state is anti- Feedback;Second returns to module, for feedback of status to be back into diagnostic equipment;Wherein, diagnostic equipment judges whether to receive feedback of status, If receiving feedback of status, diagnostic equipment judges whether Insulation monitoring is completed, if Insulation monitoring does not complete, diagnostic equipment hair Send close command;If Insulation monitoring is completed, diagnostic equipment output Insulation monitoring result.

Further, if not receiving feedback of status, diagnostic equipment stops Insulation monitoring, and exports fault message.

Further, said apparatus also includes:Second detection module, after the electricity on electric vehicle, detect battery Bag whether there is insulation fault, and the first relay whether there is adhesion fault, and the second relay whether there is adhesion fault, If detecting that insulation fault is not present in battery bag, adhesion fault is not present in the first relay, and the second relay is not present and glued Even failure, then perform the function of the first receiving module.

Another aspect according to embodiments of the present invention, a kind of Insulation Inspection System of electric vehicle is additionally provided, including:Examine Disconnected instrument, for the close command of transmission, wherein, close command be used for inside the battery bag of indicating closing electric vehicle first after Electrical equipment or the second relay;Battery bag, it is connected with diagnostic equipment, for performing close command;Battery management system, positioned at battery Bag is internal, for resistance value corresponding after the first relay of reading or the second relay closure, detects corresponding resistance Whether value meets default insulation conditions, obtains Insulation monitoring result, and Insulation monitoring result is back into diagnostic equipment.

Another aspect according to embodiments of the present invention, a kind of electric vehicle is additionally provided, including:Electricity in above-described embodiment The Insulation Inspection System of motor-car.

In embodiments of the present invention, the close command that diagnostic equipment is sent is received, after close command is performed, reads and closes The corresponding resistance value of relay after conjunction, detects whether corresponding resistance value meets default insulation conditions, obtains insulation inspection Result is surveyed, and Insulation monitoring result is back to diagnostic equipment, electric vehicle is carried out before high pressure on electric vehicle so as to realize Insulation monitoring.It is easily noted that, because the close command that diagnostic equipment is sent indicates independent closing relay, in battery bag First relay and the second relay will not be closed at, and avoid the first relay and the second relay is closed at, electronic High pressure on vehicle, so as to avoid causing personnel's electric shock or high voltage parts damage, solves the insulation of existing electric vehicle Detection method is to detect the insulaion resistance of electric vehicle on electric vehicle after high pressure by battery management system, is easily led Cause personnel get an electric shock and the technical problem of high voltage component damage.Therefore, not only can be with by scheme provided in an embodiment of the present invention Cumbersome artificial Insulation monitoring is avoided, simplifies Insulation monitoring process, Insulation monitoring speed is lifted, can also avoid preventing personnel from touching Electricity and high voltage component damage, lift the security of Insulation monitoring.

Brief description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is a kind of flow chart of the insulation detecting method of electric vehicle according to embodiments of the present invention;

Fig. 2 is a kind of schematic diagram of the high pressure principle of electric car vehicle according to embodiments of the present invention;

Fig. 3 is a kind of flow chart of the insulation detecting method of optional electric vehicle according to embodiments of the present invention;

Fig. 4 is a kind of schematic diagram of the insulation detection device of electric vehicle according to embodiments of the present invention;And

Fig. 5 is a kind of schematic diagram of the Insulation Inspection System of electric vehicle according to embodiments of the present invention;

Embodiment

In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects Enclose.

It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, " Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product Or the intrinsic other steps of equipment or unit.

Embodiment 1

According to embodiments of the present invention, there is provided a kind of embodiment of the insulation detecting method of electric vehicle, it is necessary to explanation It is that can be performed the step of the flow of accompanying drawing illustrates in the computer system of such as one group computer executable instructions, Also, although logical order is shown in flow charts, in some cases, can be with different from order execution herein Shown or described step.

Fig. 1 is a kind of flow chart of the insulation detecting method of electric vehicle according to embodiments of the present invention, as shown in figure 1, This method comprises the following steps:

Step S102, the close command that diagnostic equipment is sent is received, wherein, close command is used for indicating closing electric vehicle The first relay or the second relay inside battery bag.

Specifically, the first above-mentioned relay can be the positive relay of master inside battery bag;The second above-mentioned relay Can be the negative relay of master inside battery bag, as shown in Figure 2.

In a kind of optional scheme, as shown in Fig. 2 under ON electricity conditions, the positive relay of master, master inside battery bag are negative Relay is in off-state, when the electrical equipment end high-tension circuit outside battery bag has Insulation Problems, can not detect Failure is simultaneously fed back, if now performing upper high pressure action, is closed at leading positive relay, main negative relay, may cause personnel Electric shock, high voltage parts damage etc..In order to prevent above mentioned problem, close command can be sent by diagnostic equipment, individually closure master Positive relay or main negative relay.

Step S104, it is corresponding after the first relay of reading or the second relay closure after close command is performed Resistance value.

In a kind of optional scheme, as shown in Fig. 2 diagnostic equipment can send main positive relay close command, battery bag The positive relay closure of internal master, BMS can read the resistance value corresponding with main positive relay, you can to detect electric car Vehicle positive pole to the insulating resistance value of level platform.In another optional scheme, diagnostic equipment can send main negative relay Close command, the master inside battery bag bear relay closure, and BMS can read corresponding resistance after main negative relay closure Value, you can to detect insulating resistance value of the vehicle negative pole of electric vehicle to level platform.

Step S106, detects whether corresponding resistance value meets default insulation conditions, obtains Insulation monitoring result.

Asked specifically, above-mentioned default insulation conditions can be electrical equipment end high-tension circuit outside battery bag in the absence of insulation In the case of topic, the first relay and the corresponding insulating resistance value of the second relay.

Step S108, Insulation monitoring result is back to diagnostic equipment.

In a kind of optional scheme, BMS is reading insulated electro of the vehicle positive pole to level platform of electric vehicle respectively Resistance, and electric vehicle vehicle negative pole to the insulaion resistance of level platform after, it can be determined that whether the resistance value read full The default insulation conditions of foot, if the resistance value read meets default insulation conditions, can obtain vehicle Insulation monitoring The Insulation monitoring result passed through;If the resistance value read is unsatisfactory for default insulation conditions, vehicle insulation can be obtained The Insulation monitoring result not passed through is detected, and obtained Insulation monitoring result is back to diagnostic equipment, is shown by diagnostic equipment.

By the above embodiment of the present invention, the close command that diagnostic equipment is sent is received, after close command is performed, is read The resistance value corresponding with the relay after closure, detects whether corresponding resistance value meets default insulation conditions, obtains absolutely Edge testing result, and Insulation monitoring result is back to diagnostic equipment, so as to realize on electric vehicle before high pressure to electric vehicle Carry out Insulation monitoring.It is easily noted that, because the close command that diagnostic equipment is sent indicates independent closing relay, battery bag In the first relay and the second relay will not be closed at, avoid the first relay and the second relay be closed at, High pressure on electric vehicle, so as to avoid causing personnel's electric shock or high voltage parts damage, solves existing electric vehicle Insulation detecting method is the insulaion resistance for detecting electric vehicle on electric vehicle after high pressure by battery management system, is held It is easily caused the technical problem that personnel get an electric shock and high voltage component damages.Therefore, the scheme provided by the above embodiment of the present invention, Cumbersome artificial Insulation monitoring can be not only avoided, simplifies Insulation monitoring process, Insulation monitoring speed is lifted, can also avoid preventing Only personnel get an electric shock and high voltage component damages, and lift the security of Insulation monitoring.

Alternatively, in the above embodiment of the present invention, step S106 detects whether corresponding resistance value meets to preset absolutely Edge strip part, Insulation monitoring result is obtained, including:

Step S1062, obtain preset threshold range corresponding to corresponding resistance value.

Specifically, above-mentioned preset threshold range can be electric vehicle be not present Insulation Problems in the case of, with first after The corresponding first resistor threshold range of electrical equipment, and the second resistance threshold range corresponding with the first relay.

Step S1064, judge corresponding resistance value whether within preset threshold range.

Step S1066, if corresponding resistance value is within preset threshold range, it is determined that Insulation monitoring result is Insulation monitoring passes through.

Step S1068, if corresponding resistance value is in outside preset threshold range, it is determined that Insulation monitoring result is Insulation monitoring does not pass through.

In a kind of optional scheme, BMS read the vehicle positive pole of electric vehicle to the insulaion resistance of level platform it Afterwards, by the vehicle positive pole of electric vehicle to the insulaion resistance of level platform compared with first resistor threshold range, if this is exhausted Edge resistance is within the first resistor threshold range, then can determine that the insulaion resistance meets insulation conditions, Insulation monitoring knot Fruit passes through for Insulation monitoring;If the insulaion resistance is not within the first resistor threshold range, the insulation can be determined Resistance is unsatisfactory for insulation conditions, and Insulation monitoring result is that Insulation monitoring does not pass through.

In another optional scheme, BMS is reading insulaion resistance of the vehicle negative pole to level platform of electric vehicle Afterwards, by the vehicle negative pole of electric vehicle to the insulaion resistance of level platform compared with second resistance threshold range, if should Insulaion resistance is within the second resistance threshold range, then can determine that the insulaion resistance meets insulation conditions, Insulation monitoring As a result pass through for Insulation monitoring;If the insulaion resistance is not within the second resistance threshold range, it can determine that this is exhausted Edge resistance is unsatisfactory for insulation conditions, and Insulation monitoring result is that Insulation monitoring does not pass through.

Herein it should be noted that after Insulation monitoring result and main negative relay closure after only main positive relay closure Insulation monitoring result be Insulation monitoring by can just determine electric vehicle naked failure, high pressure behaviour can be performed Make.

Alternatively, in the above embodiment of the present invention, in step S106, detect whether corresponding resistance value meets to preset Insulation conditions, after obtaining Insulation monitoring result, this method also includes:

Step S110, receive diagnostic equipment send open command, wherein, open command be used for indicate disconnect closure after after Electrical equipment.

In a kind of optional scheme, when diagnostic equipment send be the first relay close command when, obtaining insulation inspection Survey after result, diagnostic equipment can send the first relay open command;What it is when diagnostic equipment transmission is that the second relay closure refers to When making, after Insulation monitoring result is obtained, diagnostic equipment can send the second relay open command.

Step S112, after open command is performed, generate feedback of status.

In a kind of optional scheme, after the open command of diagnostic equipment transmission is received, the relay of closure performs Open command, after the relay of closure disconnects, return to the feedback of status for confirming that the relay of closure disconnects;If closure Relay disconnects not successfully, then non-return state is fed back.

Step S114, feedback of status is back to diagnostic equipment.

Wherein, diagnostic equipment judges whether to receive feedback of status, if receiving feedback of status, judges that Insulation monitoring is No completion, if Insulation monitoring does not complete, the close command of diagnostic equipment transmission, if Insulation monitoring is completed, output insulation Testing result.

In a kind of optional scheme, if diagnostic equipment receives the feedback of status for confirming that the relay of closure disconnects, Confirm that the relay of closure successfully disconnects, further may determine that whether the Insulation monitoring of electric vehicle is completed, that is, judge whether Obtain leading the Insulation monitoring result after the Insulation monitoring result after positive relay closure, and main negative relay closure, if only Obtain a kind of Insulation monitoring result, it is determined that Insulation monitoring is not completed, it is necessary to continue Insulation monitoring, receives diagnostic equipment again The close command of another relay closure sent, after another relay performs close command, reads another with this The corresponding resistance value of individual relay, and by judging whether to meet default insulation conditions, obtain Insulation monitoring result.For example, If what is received for the first time is the first relay close command, after the disconnection of the first relay, second of reception diagnosis The second relay close command that instrument is sent.

In another optional scheme, if diagnostic equipment receives the feedback of status for confirming that the relay of closure disconnects, Then confirm that the relay of closure successfully disconnects, further may determine that whether the Insulation monitoring of electric vehicle is completed, be i.e. judgement is It is no to obtain leading the Insulation monitoring result after the Insulation monitoring result after positive relay closure, and main negative relay closure, if Obtain two kinds of Insulation monitoring results, it is determined that Insulation monitoring is completed, and can be shown obtain two kinds of Insulation monitoring results Output, so as to which user can accurately know whether electric vehicle passes through Insulation monitoring.

Alternatively, in the above embodiment of the present invention, if not receiving feedback of status, diagnostic equipment stops insulation inspection Survey, and export fault message.

In a kind of optional scheme, if diagnostic equipment does not receive the feedback of status for confirming that the relay of closure disconnects, Then confirm that the relay of closure disconnects not successfully, in order to prevent the situation that two relays close, confirming closure After relay disconnects not successfully, stop carrying out Insulation monitoring, and export fault message, prompt user to carry out troubleshooting.

By above-mentioned steps S110 to step S114, it is necessary to receive closing for diagnostic equipment transmission after testing result is obtained Instruction is closed, and is judged whether by diagnostic equipment to receive the feedback of status of return, determines whether to continue Insulation monitoring, is protected Demonstrate,prove the security of Insulation monitoring.

Alternatively, in the above embodiment of the present invention, before step S102, the close command for receiving diagnostic equipment transmission, This method also includes:

Step S120, on electric vehicle after electricity, detection battery bag whether there is insulation fault, and the first relay It whether there is adhesion fault with the second relay.

Step S122, if detected that insulation fault is not present in battery bag, and the first relay and the second relay would not be deposited In adhesion fault, then enter the step of receiving close command that diagnostic equipment is sent.

In a kind of optional scheme, after electric vehicle assembling is completed, battery bag ON electricity, BMS, which detects battery bag, is No have an insulation fault, that is, detects insulated electro of the battery bag positive pole to the insulaion resistance of level platform and battery bag negative pole to level platform Whether resistance meets that insulation conditions, and the positive relay of master that BMS is detected in battery bag bear relay with the presence or absence of adhesion event with master Barrier, be not in that main positive relay and main negative relay are closed at during ensureing that electric vehicle carries out Insulation monitoring Situation occurs.Battery bag naked failure is detected in BMS, and dereliction is just, in the case of main negative relay adhesion fault, start The Insulation monitoring of electric vehicle, receive the close command that diagnostic equipment is sent.

By above-mentioned steps S120 to step S122, before the close command that diagnostic equipment is sent is received, battery bag is detected It whether there is adhesion fault with the presence or absence of insulation fault, and the first relay and the second relay, and detecting battery bag In the absence of insulation fault, and in the case that adhesion fault is not present in the first relay and the second relay, into receiving diagnostic equipment The step of close command of transmission, so as to further avoid preventing personnel from from getting an electric shock and high voltage component damage, it is ensured that Insulation monitoring Security.

Fig. 3 is a kind of flow chart of the insulation detecting method of optional electric vehicle according to embodiments of the present invention, below A kind of preferred embodiment of the present invention is described in detail with reference to Fig. 2 and Fig. 3, as shown in figure 3, this method can include it is as follows Step:

Step S31, vehicle assembling are completed, BMS detection battery bag naked failures, dereliction just, main negative relay adhesion therefore Barrier.

Alternatively, vehicle assembling finishes, upper ON electro-detections battery bag naked failure, main positive relay, main negative relay Without adhesion fault

Step S32, diagnostic equipment send the main positive relay order of closure, and BMS reads vehicle positive pole to level platform resistance value.

Step S33, judges whether vehicle positive pole meets insulating requirements and output result to level platform.

Alternatively, diagnostic equipment sends the main positive relay order of individually closure, and BMS reads vehicle cathode circuit (in Fig. 2 Shown in bold portion) to the insulaion resistance of level platform, judge whether insulation meets requirement and output result.

Step S34, diagnostic equipment, which is sent, disconnects main positive relay order.

Step S35, judge to lead whether positive relay disconnects.

Alternatively, diagnostic equipment, which is sent, disconnects main positive relay order, and receives and confirm that the state that main positive relay disconnects is anti- Feedback, if receiving the feedback of status that main positive relay disconnects, it is determined that main positive relay disconnects, and enters step S36;If do not receive The feedback of status disconnected to the positive relay of master, it is determined that main positive relay does not disconnect, into step S311.

Step S36, diagnostic equipment send the main negative relay order of closure, and BMS reads vehicle negative pole to level platform resistance value.

Step S37, judges whether vehicle negative pole meets insulating requirements and output result to level platform.

Alternatively, after diagnostic equipment receives the feedback of status that main positive relay disconnects, the main negative relay order of closure is sent, BMS reads insulaion resistance of the vehicle negative pole (as shown in the dotted portion in Fig. 2) to level platform, judges whether insulation meets to require And output result.

Step S38, diagnostic equipment, which is sent, disconnects main negative relay order.

Step S39, judges whether main negative relay disconnects.

Alternatively, diagnostic equipment, which is sent, disconnects main negative relay order, and receives and confirm that the state that main negative relay disconnects is anti- Feedback, if receiving the feedback of status that main negative relay disconnects, it is determined that main negative relay disconnects, and enters step S36;If do not receive The feedback of status disconnected to main negative relay, it is determined that main negative relay does not disconnect, into step S311.

Step S310, testing result is exported, complete Insulation monitoring.

Alternatively, vehicle positive pole is exported to level platform, vehicle negative pole to the Insulation monitoring result of level platform.

Step S311, troubleshooting.

Alternatively, if it is determined that main positive relay or main negative relay do not disconnect, then stop Insulation monitoring, carry out failure Processing.

Pass through above-mentioned steps S31 to step S311, there is provided the insulation detecting method after a kind of electric vehicle vehicle is offline, Diagnostic equipment can increase Insulation monitoring function, after vehicle is offline, in upper ON electricity, and in the case of not upper high pressure, pass through diagnosis Instrument sends instruction, and individually the main positive relay of closure and main negative relay, judge whether vehicle meets insulating requirements, so as to realize pair Vehicle carries out insulaion resistance detection, and high pressure is performed after by Insulation monitoring, prevents personnel get an electric shock and high voltage component damages etc. Phenomenon occurs, it is ensured that vehicle high-voltage safety.

Embodiment 2

According to embodiments of the present invention, there is provided a kind of embodiment of the insulation detection device of electric vehicle.

Fig. 4 is a kind of schematic diagram of the insulation detection device of electric vehicle according to embodiments of the present invention, as shown in figure 4, The device includes:

First receiving module 41, for receiving the close command of diagnostic equipment transmission, wherein, close command is used for indicating closing The first relay or the second relay inside the battery bag of electric vehicle.

Specifically, the first above-mentioned relay can be the positive relay of master inside battery bag;The second above-mentioned relay Can be the negative relay of master inside battery bag, as shown in Figure 2.

In a kind of optional scheme, as shown in Fig. 2 under ON electricity conditions, the positive relay of master, master inside battery bag are negative Relay is in off-state, when the electrical equipment end high-tension circuit outside battery bag has Insulation Problems, can not detect Failure is simultaneously fed back, if now performing upper high pressure action, is closed at leading positive relay, main negative relay, may cause personnel Electric shock, high voltage parts damage etc..In order to prevent above mentioned problem, close command can be sent by diagnostic equipment, individually closure master Positive relay or main negative relay.

Read module 43, after after close command is performed, reading the first relay or the second relay closure Corresponding resistance value.

In a kind of optional scheme, as shown in Fig. 2 diagnostic equipment can send main positive relay close command, battery bag The positive relay closure of internal master, BMS can read the resistance value corresponding with main positive relay, you can to detect electric car Vehicle positive pole to the insulating resistance value of level platform.In another optional scheme, diagnostic equipment can send main negative relay Close command, the master inside battery bag bear relay closure, and BMS can read corresponding resistance after main negative relay closure Value, you can to detect insulating resistance value of the vehicle negative pole of electric vehicle to level platform.

First detection module 45, for detecting whether corresponding resistance value meets default insulation conditions, obtain insulation inspection Survey result.

Asked specifically, above-mentioned default insulation conditions can be electrical equipment end high-tension circuit outside battery bag in the absence of insulation In the case of topic, the first relay and the corresponding insulating resistance value of the second relay.

First returns to module 47, for Insulation monitoring result to be back into diagnostic equipment.

In a kind of optional scheme, BMS is reading insulated electro of the vehicle positive pole to level platform of electric vehicle respectively Resistance, and electric vehicle vehicle negative pole to the insulaion resistance of level platform after, it can be determined that whether the resistance value read full The default insulation conditions of foot, if the resistance value read meets default insulation conditions, can obtain vehicle Insulation monitoring The Insulation monitoring result passed through;If the resistance value read is unsatisfactory for default insulation conditions, vehicle insulation can be obtained The Insulation monitoring result not passed through is detected, and obtained Insulation monitoring result is back to diagnostic equipment, is shown by diagnostic equipment.

By the above embodiment of the present invention, the close command that diagnostic equipment is sent is received, after close command is performed, is read The resistance value corresponding with the relay after closure, detects whether corresponding resistance value meets default insulation conditions, obtains absolutely Edge testing result, and Insulation monitoring result is back to diagnostic equipment, so as to realize on electric vehicle before high pressure to electric vehicle Carry out Insulation monitoring.It is easily noted that, because the close command that diagnostic equipment is sent indicates independent closing relay, battery bag In the first relay and the second relay will not be closed at, avoid the first relay and the second relay be closed at, High pressure on electric vehicle, so as to avoid causing personnel's electric shock or high voltage parts damage, solves existing electric vehicle Insulation detecting method is the insulaion resistance for detecting electric vehicle on electric vehicle after high pressure by battery management system, is held It is easily caused the technical problem that personnel get an electric shock and high voltage component damages.Therefore, the scheme provided by the above embodiment of the present invention, Cumbersome artificial Insulation monitoring can be not only avoided, simplifies Insulation monitoring process, Insulation monitoring speed is lifted, can also avoid preventing Only personnel get an electric shock and high voltage component damages, and lift the security of Insulation monitoring.

Alternatively, in the above embodiment of the present invention, first detection module includes:

Acquisition submodule, for obtaining preset threshold range corresponding to corresponding resistance value.

Specifically, above-mentioned preset threshold range can be electric vehicle be not present Insulation Problems in the case of, with first after The corresponding first resistor threshold range of electrical equipment, and the second resistance threshold range corresponding with the first relay.

Judging submodule, for judging corresponding resistance value whether within preset threshold range.

First processing submodule, if be in for corresponding resistance value within preset threshold range, it is determined that insulation Testing result passes through for Insulation monitoring.

Second processing submodule, if be in for corresponding resistance value outside preset threshold range, it is determined that insulation Testing result is that Insulation monitoring does not pass through.

In a kind of optional scheme, BMS read the vehicle positive pole of electric vehicle to the insulaion resistance of level platform it Afterwards, by the vehicle positive pole of electric vehicle to the insulaion resistance of level platform compared with first resistor threshold range, if this is exhausted Edge resistance is within the first resistor threshold range, then can determine that the insulaion resistance meets insulation conditions, Insulation monitoring knot Fruit passes through for Insulation monitoring;If the insulaion resistance is not within the first resistor threshold range, the insulation can be determined Resistance is unsatisfactory for insulation conditions, and Insulation monitoring result is that Insulation monitoring does not pass through.

In another optional scheme, BMS is reading insulaion resistance of the vehicle negative pole to level platform of electric vehicle Afterwards, by the vehicle negative pole of electric vehicle to the insulaion resistance of level platform compared with second resistance threshold range, if should Insulaion resistance is within the second resistance threshold range, then can determine that the insulaion resistance meets insulation conditions, Insulation monitoring As a result pass through for Insulation monitoring;If the insulaion resistance is not within the second resistance threshold range, it can determine that this is exhausted Edge resistance is unsatisfactory for insulation conditions, and Insulation monitoring result is that Insulation monitoring does not pass through.

Herein it should be noted that after Insulation monitoring result and main negative relay closure after only main positive relay closure Insulation monitoring result be Insulation monitoring by can just determine electric vehicle naked failure, high pressure behaviour can be performed Make.

Alternatively, in the above embodiment of the present invention, the device also includes:

Second receiving module, for receiving the open command of diagnostic equipment transmission, wherein, open command is used to indicate that disconnection is closed Relay after conjunction.

In a kind of optional scheme, when diagnostic equipment send be the first relay close command when, obtaining insulation inspection Survey after result, diagnostic equipment can send the first relay open command;What it is when diagnostic equipment transmission is that the second relay closure refers to When making, after Insulation monitoring result is obtained, diagnostic equipment can send the second relay open command.

Generation module, for after open command is performed, generating feedback of status.

In a kind of optional scheme, after the open command of diagnostic equipment transmission is received, the relay of closure performs Open command, after the relay of closure disconnects, return to the feedback of status for confirming that the relay of closure disconnects;If closure Relay disconnects not successfully, then non-return state is fed back.

Second returns to module, for feedback of status to be back into diagnostic equipment.

Wherein, diagnostic equipment judges whether to receive feedback of status, if receiving feedback of status, diagnostic equipment judges insulation Detect whether to complete, if Insulation monitoring does not complete, diagnostic equipment sends close command;If Insulation monitoring is completed, diagnose Instrument exports Insulation monitoring result.

In a kind of optional scheme, if diagnostic equipment receives the feedback of status for confirming that the relay of closure disconnects, Confirm that the relay of closure successfully disconnects, further may determine that whether the Insulation monitoring of electric vehicle is completed, that is, judge whether Obtain leading the Insulation monitoring result after the Insulation monitoring result after positive relay closure, and main negative relay closure, if only Obtain a kind of Insulation monitoring result, it is determined that Insulation monitoring is not completed, it is necessary to continue Insulation monitoring, receives diagnostic equipment again The close command of another relay closure sent, after another relay performs close command, reads another with this The corresponding resistance value of individual relay, and by judging whether to meet default insulation conditions, obtain Insulation monitoring result.For example, If what is received for the first time is the first relay close command, after the disconnection of the first relay, second of reception diagnosis The second relay close command that instrument is sent.

In another optional scheme, if diagnostic equipment receives the feedback of status for confirming that the relay of closure disconnects, Then confirm that the relay of closure successfully disconnects, further may determine that whether the Insulation monitoring of electric vehicle is completed, be i.e. judgement is It is no to obtain leading the Insulation monitoring result after the Insulation monitoring result after positive relay closure, and main negative relay closure, if Obtain two kinds of Insulation monitoring results, it is determined that Insulation monitoring is completed, and can be shown obtain two kinds of Insulation monitoring results Output, so as to which user can accurately know whether electric vehicle passes through Insulation monitoring.

Alternatively, in the above embodiment of the present invention, if not receiving feedback of status, diagnostic equipment stops insulation inspection Survey, and export fault message.

In a kind of optional scheme, if diagnostic equipment does not receive the feedback of status for confirming that the relay of closure disconnects, Then confirm that the relay of closure disconnects not successfully, in order to prevent the situation that two relays close, confirming closure After relay disconnects not successfully, stop carrying out Insulation monitoring, and export fault message, prompt user to carry out troubleshooting.

By such scheme, it is necessary to receive the close command of diagnostic equipment transmission after testing result is obtained, and by diagnosing Instrument judges whether to receive the feedback of status of return, determines whether to continue Insulation monitoring, ensures the peace of Insulation monitoring Quan Xing.

Alternatively, in the above embodiment of the present invention, the device also includes:

Second detection module, after the electricity on electric vehicle, detection battery bag whether there is insulation fault, Yi Ji One relay and the second relay whether there is adhesion fault, if detect that battery bag is not present insulation fault, and first after The step of adhesion fault is not present in electrical equipment and the second relay, then entrance receives the close command that diagnostic equipment is sent.

In a kind of optional scheme, after electric vehicle assembling is completed, battery bag ON electricity, BMS, which detects battery bag, is No have an insulation fault, that is, detects insulated electro of the battery bag positive pole to the insulaion resistance of level platform and battery bag negative pole to level platform Whether resistance meets that insulation conditions, and the positive relay of master that BMS is detected in battery bag bear relay with the presence or absence of adhesion event with master Barrier, be not in that main positive relay and main negative relay are closed at during ensureing that electric vehicle carries out Insulation monitoring Situation occurs.Battery bag naked failure is detected in BMS, and dereliction is just, in the case of main negative relay adhesion fault, start The Insulation monitoring of electric vehicle, receive the close command that diagnostic equipment is sent.

By such scheme, before the close command that reception diagnostic equipment is sent, detection battery bag is with the presence or absence of insulation event Barrier, and the first relay and the second relay whether there is adhesion fault, and detect that insulation fault is not present in battery bag, And first relay and the second relay adhesion fault is not present in the case of, into receiving close command that diagnostic equipment sends Step, so as to further avoid preventing personnel from from getting an electric shock and high voltage component damage, it is ensured that the security of Insulation monitoring.

Embodiment 3

According to embodiments of the present invention, there is provided a kind of embodiment of the Insulation Inspection System of electric vehicle.

Fig. 5 is a kind of schematic diagram of the Insulation Inspection System of electric vehicle according to embodiments of the present invention, as shown in figure 5, The system includes:

Diagnostic equipment 51, for sending close command, wherein, close command is used in the battery bag of indicating closing electric vehicle First relay or the second relay in portion.

Specifically, the first above-mentioned relay can be the positive relay of master inside battery bag;The second above-mentioned relay Can be the negative relay of master inside battery bag, as shown in Figure 2.

In a kind of optional scheme, as shown in Fig. 2 under ON electricity conditions, the positive relay of master, master inside battery bag are negative Relay is in off-state, when the electrical equipment end high-tension circuit outside battery bag has Insulation Problems, can not detect Failure is simultaneously fed back, if now performing upper high pressure action, is closed at leading positive relay, main negative relay, may cause personnel Electric shock, high voltage parts damage etc..In order to prevent above mentioned problem, close command can be sent by diagnostic equipment, individually closure master Positive relay or main negative relay.

Battery bag 53, is connected with diagnostic equipment, for performing close command.

Battery management system 55, inside battery bag, after reading the first relay or the second relay closure Corresponding resistance value, detects whether corresponding resistance value meets default insulation conditions, obtains Insulation monitoring result, and will be exhausted Edge testing result is back to diagnostic equipment.

Asked specifically, above-mentioned default insulation conditions can be electrical equipment end high-tension circuit outside battery bag in the absence of insulation In the case of topic, the first relay and the corresponding insulating resistance value of the second relay.

In a kind of optional scheme, as shown in Fig. 2 diagnostic equipment can send main positive relay close command, battery bag The positive relay closure of internal master, BMS can read the resistance value corresponding with main positive relay, you can to detect electric car Vehicle positive pole to the insulating resistance value of level platform.In another optional scheme, diagnostic equipment can send main negative relay Close command, the master inside battery bag bear relay closure, BMS can read with the main resistance value that to bear relay corresponding, i.e., Insulating resistance value of the vehicle negative pole to level platform of electric vehicle can be detected.BMS is reading the whole of electric vehicle respectively Car positive pole to the insulaion resistance of level platform, and electric vehicle vehicle negative pole to the insulaion resistance of level platform after, can sentence Whether the disconnected resistance value read meets default insulation conditions, if the resistance value read meets default insulation conditions, The Insulation monitoring result that vehicle Insulation monitoring passes through can then be obtained;If the resistance value read is unsatisfactory for default insulation strip Part, then the Insulation monitoring result that vehicle Insulation monitoring does not pass through can be obtained, and obtained Insulation monitoring result is back to and examined Disconnected instrument, is shown by diagnostic equipment.

By the above embodiment of the present invention, the close command that diagnostic equipment is sent is received, after close command is performed, is read The resistance value corresponding with the relay after closure, detects whether corresponding resistance value meets default insulation conditions, obtains absolutely Edge testing result, and Insulation monitoring result is back to diagnostic equipment, so as to realize on electric vehicle before high pressure to electric vehicle Carry out Insulation monitoring.It is easily noted that, because the close command that diagnostic equipment is sent indicates independent closing relay, battery bag In the first relay and the second relay will not be closed at, avoid the first relay and the second relay be closed at, High pressure on electric vehicle, so as to avoid causing personnel's electric shock or high voltage parts damage, solves existing electric vehicle Insulation detecting method is the insulaion resistance for detecting electric vehicle on electric vehicle after high pressure by battery management system, is held It is easily caused the technical problem that personnel get an electric shock and high voltage component damages.Therefore, the scheme provided by the above embodiment of the present invention, Cumbersome artificial Insulation monitoring can be not only avoided, simplifies Insulation monitoring process, Insulation monitoring speed is lifted, can also avoid preventing Only personnel get an electric shock and high voltage component damages, and lift the security of Insulation monitoring.

Embodiment 4

According to embodiments of the present invention, there is provided a kind of embodiment of electric vehicle, including:It is electronic in above-described embodiment 3 The Insulation Inspection System of vehicle.

By the above embodiment of the present invention, the close command that diagnostic equipment is sent is received, after close command is performed, is read The resistance value corresponding with the relay after closure, detects whether corresponding resistance value meets default insulation conditions, obtains absolutely Edge testing result, Insulation monitoring is carried out to electric vehicle before high pressure on electric vehicle so as to realize.It is easily noted that, by The first relay and the second relay in the independent closing relay of close command instruction that diagnostic equipment is sent, battery bag will not It is closed at, avoids the first relay and the second relay is closed at, high pressure on electric vehicle, so as to avoid causing personnel Get an electric shock or high voltage parts damage, the insulation detecting method for solving existing electric vehicle be on electric vehicle high pressure it Afterwards, by battery management system detect electric vehicle insulaion resistance, easily cause personnel get an electric shock and high voltage component damage Technical problem.Therefore, the scheme provided by the above embodiment of the present invention, can not only avoid cumbersome artificial Insulation monitoring, Simplify Insulation monitoring process, lift Insulation monitoring speed, can also avoid preventing that personnel from getting an electric shock and high voltage component damage, lifting are exhausted The security of edge detection.

The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.

In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment The part of detailed description, it may refer to the associated description of other embodiment.

In several embodiments provided herein, it should be understood that disclosed technology contents, others can be passed through Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module Connect, can be electrical or other forms.

The unit illustrated as separating component can be or may not be physically separate, show as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.

If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or Part steps.And foregoing storage medium includes:USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes Medium.

Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as protection scope of the present invention.

Claims (10)

  1. A kind of 1. insulation detecting method of electric vehicle, it is characterised in that including:
    The close command that diagnostic equipment is sent is received, wherein, the close command is used in the battery bag of indicating closing electric vehicle First relay or the second relay in portion;
    It is corresponding after reading first relay or second relay closure after the close command is performed Resistance value;
    Detect whether the corresponding resistance value meets default insulation conditions, obtain Insulation monitoring result;
    The Insulation monitoring result is back to the diagnostic equipment.
  2. 2. according to the method for claim 1, it is characterised in that whether the detection corresponding resistance value meets default exhausted Edge strip part, Insulation monitoring result is obtained, including:
    Obtain preset threshold range corresponding to the corresponding resistance value;
    Judge the corresponding resistance value whether within the preset threshold range;
    If the corresponding resistance value is within the preset threshold range, it is determined that the Insulation monitoring result is exhausted Edge detection passes through;
    If the corresponding resistance value is in outside the preset threshold range, it is determined that the Insulation monitoring result is exhausted Edge detection does not pass through.
  3. 3. according to the method for claim 1, it is characterised in that detecting whether the corresponding resistance value meets to preset Insulation conditions, after obtaining Insulation monitoring result, methods described also includes:
    The open command that diagnostic equipment is sent is received, wherein, the open command is used to indicate to disconnect the relay after the closure;
    After the open command is performed, feedback of status is generated;
    The feedback of status is back to the diagnostic equipment;
    Wherein, the diagnostic equipment judges whether to receive the feedback of status, if the relay received after the closure returns Return the feedback of status, then the diagnostic equipment judge whether Insulation monitoring is completed;If the Insulation monitoring does not complete, institute State diagnostic equipment and send the close command;If the Insulation monitoring is completed, the diagnostic equipment exports the Insulation monitoring knot Fruit.
  4. 4. according to the method for claim 1, it is characterised in that described before the close command that diagnostic equipment is sent is received Method also includes:
    On the electric vehicle after electricity, detect the battery bag and whether there is insulation fault, and first relay It whether there is adhesion fault with second relay;
    If detect that the insulation fault is not present in the battery bag, and first relay and second relay are not The adhesion fault be present, then the step of close command of entrance reception diagnostic equipment transmission.
  5. A kind of 5. insulation detection device of electric vehicle, it is characterised in that including:
    First receiving module, for receiving the close command of diagnostic equipment transmission, wherein, the close command is used for indicating closing electricity The first relay or the second relay inside the battery bag of motor-car;
    Read module, for after the close command is performed, reading first relay or second relay Corresponding resistance value after closure;
    First detection module, for detecting whether the corresponding resistance value meets default insulation conditions, obtain Insulation monitoring As a result;
    First returns to module, for the Insulation monitoring result to be back into the diagnostic equipment.
  6. 6. device according to claim 5, it is characterised in that the first detection module includes:
    Acquisition submodule, for obtaining preset threshold range corresponding to the corresponding resistance value;
    Judging submodule, for judging the corresponding resistance value whether within the preset threshold range;
    First processing submodule, if be in for the corresponding resistance value within the preset threshold range, it is determined that The Insulation monitoring result passes through for Insulation monitoring;
    Second processing submodule, if be in for the corresponding resistance value outside the preset threshold range, it is determined that The Insulation monitoring result is that Insulation monitoring does not pass through.
  7. 7. device according to claim 5, it is characterised in that described device also includes:
    Second receiving module, for receiving the open command of diagnostic equipment transmission, wherein, the open command is used to indicate to disconnect institute State the relay after closure;
    Generation module, for after the open command is performed, generating feedback of status;
    Second returns to module, for the feedback of status to be back into the diagnostic equipment;
    Wherein, the diagnostic equipment judges whether to receive the feedback of status, described to examine if receiving the feedback of status Disconnected instrument judges whether Insulation monitoring is completed, if the Insulation monitoring does not complete, the diagnostic equipment sends close command extremely;Such as Insulation monitoring described in fruit is completed, then the diagnostic equipment exports the Insulation monitoring result.
  8. 8. device according to claim 5, it is characterised in that described device also includes:
    Second detection module, after the electricity on the electric vehicle, detect the battery bag and whether there is insulation fault, institute State the first relay and whether there is adhesion fault, and second relay whether there is adhesion fault, if detecting institute State battery bag and the insulation fault is not present, adhesion fault is not present in first relay, and second relay is not deposited In adhesion fault, then the function of first receiving module is performed.
  9. A kind of 9. Insulation Inspection System of electric vehicle, it is characterised in that including:
    Diagnostic equipment, for sending close command, wherein, the close command is used for inside the battery bag of indicating closing electric vehicle The first relay or the second relay;
    The battery bag, it is connected with the diagnostic equipment, for performing the close command;
    Battery management system, inside the battery bag, for read with close after the corresponding resistance value of relay, inspection Survey whether the corresponding resistance value meets default insulation conditions, obtain Insulation monitoring result, and by the Insulation monitoring knot Fruit is back to the diagnostic equipment.
  10. 10. a kind of electric vehicle, including:The Insulation Inspection System of electric vehicle described in claim 9.
CN201610921744.6A 2016-10-21 2016-10-21 Electric vehicle and insulation detection method, device and system thereof CN107490750B (en)

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