CN112731088A - Vehicle high-voltage circuit detection method and device, vehicle and storage medium - Google Patents

Vehicle high-voltage circuit detection method and device, vehicle and storage medium Download PDF

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Publication number
CN112731088A
CN112731088A CN202011563434.4A CN202011563434A CN112731088A CN 112731088 A CN112731088 A CN 112731088A CN 202011563434 A CN202011563434 A CN 202011563434A CN 112731088 A CN112731088 A CN 112731088A
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voltage
relay
ground
insulation resistance
group
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宋芳
张天强
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FAW Group Corp
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FAW Group Corp
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Priority to CN202011563434.4A priority Critical patent/CN112731088A/en
Publication of CN112731088A publication Critical patent/CN112731088A/en
Priority to PCT/CN2021/141050 priority patent/WO2022135554A1/en
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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
    • G01R31/12—Testing 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
    • G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
    • G01R31/3275—Fault detection or status indication
    • 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
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention discloses a vehicle high-voltage circuit detection method and device, a vehicle and a storage medium. The method comprises the following steps: disconnecting all relays and grounding switches in the high-voltage circuit to obtain a first voltage-to-ground voltage group of the relay to be tested to the rear end; when the first voltage-to-ground voltage group does not meet the preset relay adhesion condition, controlling the relay to be tested to attract, and acquiring a second voltage-to-ground voltage group at the rear end of the relay to be tested; respectively attracting the anode grounding switch and the cathode grounding switch to obtain a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested; and determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group. The invention solves the problems of complete independence of insulation resistance detection and relay adhesion detection and high cost and low integration level, realizes simultaneous detection of insulation resistance failure and relay adhesion conditions, improves the detection accuracy rate and saves the detection cost.

Description

Vehicle high-voltage circuit detection method and device, vehicle and storage medium
Technical Field
The embodiment of the invention relates to the technical field of vehicle design, in particular to a vehicle high-voltage circuit detection method and device, a vehicle and a storage medium.
Background
For electric vehicles, both relay adhesion and insulation failure are very serious faults in high voltage systems. Generally, when detecting the circuit fault of the electric automobile, the relay adhesion detection and the insulation resistance failure detection are respectively carried out. At present, the mainstream insulation resistance detection method is a voltage comparison method and a low-frequency injection method, the relay adhesion detection method adopts a method of comparing the front voltage and the rear voltage of a main loop high-voltage relay, the two detections are completely independent, the problems of high cost and low integration level exist, and the influence caused by another fault cannot be eliminated in each detection process.
Disclosure of Invention
The invention provides a vehicle high-voltage circuit detection method, a vehicle high-voltage circuit detection device, a vehicle and a storage medium, and aims to realize simultaneous detection of the failure condition of the insulation resistance value of the vehicle and the adhesion condition of a relay.
In a first aspect, an embodiment of the present invention provides a vehicle high-voltage circuit detection method, which is applied to a vehicle high-voltage circuit, where the vehicle high-voltage circuit includes a power battery, a pair of ground switches, a pair of protection resistors, n sets of relay pairs, and m high-voltage components; the grounding switch comprises a positive grounding switch and a negative grounding switch, the positive grounding switch is respectively connected with the positive pole of the power battery and the protection resistor, and the negative grounding switch is respectively connected with the negative pole of the power battery and the protection resistor; the relay pair comprises a positive relay and a negative relay, the front end of the positive relay and the front end of the negative relay are respectively connected with the positive pole and the negative pole of the power battery, and the rear end of the positive relay and the rear end of the negative relay are respectively connected with the high-voltage component; wherein n and m are integers greater than or equal to 1;
the method comprises the following steps:
disconnecting all relays and grounding switches in the high-voltage circuit to obtain a first voltage-to-ground voltage group of the relay to be tested to the rear end;
when the first voltage group to earth does not meet the preset relay adhesion condition, controlling the relay to be tested to attract, and acquiring a second voltage group to earth at the rear end of the relay to be tested;
respectively attracting the anode grounding switch and the cathode grounding switch to obtain a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested;
and determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
Optionally, the first voltage-to-ground group includes a first positive voltage-to-ground and a first negative voltage-to-ground;
correspondingly, the first voltage-to-ground voltage group does not satisfy the preset relay adhesion condition, and the method comprises the following steps:
and when the first anode voltage to ground and the first cathode voltage to ground are both less than or equal to a preset relay adhesion voltage, determining that the first voltage to ground group does not meet the preset relay adhesion condition.
Optionally, the method further includes:
when the voltage of the first anode to earth is larger than the preset relay adhesion voltage, determining that the anode relay to be tested is adhered, and alarming for adhesion of the anode relay;
and when the voltage of the first negative electrode to ground is greater than the preset relay adhesion voltage, determining that the negative electrode relay to be tested is adhered, and alarming for adhesion of the negative electrode relay.
Optionally, the determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage group to ground, the third voltage group to ground and the fourth voltage group to ground includes:
determining a positive insulation resistance according to the second voltage group to ground and the third voltage group to ground;
determining a negative insulation resistance according to the second voltage group to ground and the fourth voltage group to ground;
and when the positive insulation resistance and the negative insulation resistance are both larger than a preset insulation failure resistance value, determining that the vehicle insulation resistance is not failed and the relay pair to be tested is not adhered.
Optionally, the method further includes:
when the anode insulation resistance or the cathode insulation resistance is smaller than the preset insulation failure resistance value, determining that the vehicle insulation resistance is failed;
determining the minimum value of the positive insulation resistance and the negative insulation resistance as a first detection resistance, and determining the sum of the positive insulation resistance and the negative insulation resistance as a second detection resistance;
and if the ratio of the first detection resistor to the second detection resistor is larger than the ratio of the voltage detection precision value to the battery output voltage, determining that the relay pair to be detected is not adhered.
In a second aspect, an embodiment of the present invention provides a detection apparatus for performing the above method, where the apparatus includes:
the first voltage acquisition module is used for disconnecting all relays and grounding switches in the high-voltage circuit and acquiring a first voltage-to-ground voltage group of the relay to be tested to the rear end;
the second voltage acquisition module is used for controlling the relay to be tested to be attracted when the first voltage group to be earthed does not meet the preset relay adhesion condition, and acquiring a second voltage group to be earthed at the rear end of the relay to be tested;
the third voltage acquisition module is used for attracting the anode grounding switch and the cathode grounding switch respectively to acquire a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested;
and the fault determination module is used for determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
Optionally, the first voltage-to-ground group includes a first positive voltage-to-ground and a first negative voltage-to-ground;
correspondingly, the first voltage-to-ground voltage group does not satisfy the preset relay adhesion condition, and the method comprises the following steps:
and when the first anode voltage to ground and the first cathode voltage to ground are both less than or equal to a preset relay adhesion voltage, determining that the first voltage to ground group does not meet the preset relay adhesion condition.
Optionally, the apparatus further includes an adhesion failure determination module, where the adhesion failure determination module is configured to:
when the voltage of the first anode to earth is larger than the preset relay adhesion voltage, determining that the anode relay to be tested is adhered, and alarming for adhesion of the anode relay;
and when the voltage of the first negative electrode to ground is greater than the preset relay adhesion voltage, determining that the negative electrode relay to be tested is adhered, and alarming for adhesion of the negative electrode relay.
Optionally, the fault determining module is specifically configured to:
determining a positive insulation resistance according to the second voltage group to ground and the third voltage group to ground;
determining a negative insulation resistance according to the second voltage group to ground and the fourth voltage group to ground;
and when the positive insulation resistance and the negative insulation resistance are both larger than a preset insulation failure resistance value, determining that the vehicle insulation resistance is not failed and the relay pair to be tested is not adhered.
Optionally, the fault determination module is further configured to:
when the positive insulation resistance or the negative insulation resistance is less than or equal to the preset insulation failure resistance value, determining that the vehicle insulation resistance is failed;
determining the minimum value of the positive insulation resistance and the negative insulation resistance as a first detection resistance, and determining the sum of the positive insulation resistance and the negative insulation resistance as a second detection resistance;
and if the ratio of the first detection resistor to the second detection resistor is larger than the ratio of the voltage detection precision value to the battery output voltage, determining that the relay pair to be detected is not adhered.
In a third aspect, an embodiment of the present invention further provides a vehicle, including:
one or more controllers;
a memory for storing one or more programs;
the vehicle high-voltage circuit comprises a power battery, a pair of grounding switches, a pair of protective resistors, n groups of relay pairs and m high-voltage components, wherein n and m are integers which are more than or equal to 1;
when the one or more programs are executed by the one or more controllers, the one or more controllers are caused to implement the vehicle high voltage circuit detection method according to any embodiment of the present invention.
In a fourth aspect, embodiments of the present invention also provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a vehicle high-voltage circuit detection method according to any of the embodiments of the present invention.
The invention obtains a first voltage group to ground of the rear end of the relay to be tested by disconnecting all relays and the grounding switch in the high-voltage circuit, controls the relay to be tested to pull in when the first voltage group to ground does not meet the preset relay adhesion condition, obtains a second voltage group to ground of the rear end of the relay to be tested, respectively pulls in the anode grounding switch and the cathode grounding switch, obtains a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested, determines whether the vehicle insulation resistance is invalid and whether the relay to be tested is adhered according to the second voltage group to ground, the third voltage group to ground and the fourth voltage group to ground, solves the problems that the prior insulation resistance detection method and the relay adhesion detection method are completely independent, the cost is high, the integration level is low, and the influence caused by another fault cannot be eliminated in each detection process, the vehicle insulation resistance failure detection method and the vehicle insulation resistance failure detection device have the advantages that the vehicle insulation resistance failure condition and the relay adhesion condition are detected simultaneously, the detection accuracy is improved, and the detection cost is saved.
Drawings
Fig. 1 is a schematic circuit diagram of a vehicle high-voltage circuit detection method according to an embodiment of the invention;
FIG. 2 is a flow chart of a method for detecting a high voltage circuit of a vehicle according to an embodiment of the present invention;
FIG. 3 is a flowchart of a vehicle high-voltage circuit detection method according to a second embodiment of the present invention;
fig. 4 is a block diagram of a vehicle high-voltage circuit detection device according to a third embodiment of the present invention;
fig. 5 is a block diagram of a vehicle according to a fourth embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only a part of the structures related to the present invention, not all of the structures, are shown in the drawings, and furthermore, embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Example one
The vehicle high-voltage circuit detection method of the embodiment can be applied to a vehicle high-voltage circuit, and the vehicle high-voltage circuit can comprise a power battery, a pair of grounding switches, a pair of protective resistors, n groups of relay pairs and m high-voltage components; the grounding switch comprises a positive grounding switch and a negative grounding switch, the positive grounding switch is respectively connected with the positive electrode of the power battery and the protection resistor, and the negative grounding switch is respectively connected with the negative electrode of the power battery and the protection resistor; the relay pair comprises a positive relay and a negative relay, the front end of the positive relay and the front end of the negative relay are respectively connected with the positive pole and the negative pole of the power battery, and the rear end of the positive relay and the rear end of the negative relay are respectively connected with the high-voltage component; wherein n and m are integers greater than or equal to 1.
Fig. 1 is a schematic circuit diagram of a vehicle high-voltage circuit detection method according to an embodiment of the present invention. The number of relay pairs in the high-voltage circuit of the vehicle can be one or more, and the number of high-voltage components can be one or more, and a group of relay pairs and one high-voltage component are taken as an example in fig. 1. As shown in fig. 1, the vehicle high-voltage circuit may include a power battery P, a positive ground switch S1, a negative ground switch S2, a pair of protective resistors R1 and R2, a positive relay K1, a negative relay K2, and a high-voltage component. The front end of the positive relay K1 is connected with the positive electrode of the power battery, and the rear end of the positive relay K1 is connected with the high-voltage component; the front end of the negative relay K2 is connected with the negative pole of the power battery, and the rear end of the negative relay K2 is connected with the high-voltage component; a positive voltage-to-ground monitoring point may be disposed between the positive relay K1 and the high voltage component, as at 10 locations in the vehicle high voltage circuit shown in fig. 1, and a negative voltage-to-ground monitoring point may be disposed between the negative relay K1 and the high voltage component, as at 20 locations in the vehicle high voltage circuit shown in fig. 1.
Fig. 2 is a flowchart of a vehicle high-voltage circuit detection method according to an embodiment of the present invention, where the embodiment is applicable to simultaneous detection of a vehicle insulation resistance value failure condition and a relay adhesion condition, and the method may be executed by a vehicle high-voltage circuit detection device, and the device may be implemented by software and/or hardware.
As shown in fig. 2, the method specifically includes the following steps:
and step 110, disconnecting all relays and grounding switches in the high-voltage circuit, and acquiring a first voltage-to-ground voltage group of the relay to be tested to the rear end.
Specifically, a pair of relays to be detected can be determined as a pair of relays to be detected, and one voltage-to-ground monitoring point is respectively selected between the positive and negative relays to be detected and the high-voltage component connected with the positive and negative relays to be detected. After all relays and grounding switches in a vehicle high-voltage circuit are disconnected, a first voltage-to-ground voltage group detected at a voltage-to-ground voltage monitoring point is acquired. According to the voltage value in the first voltage-to-ground voltage group, the adhesion condition of the relay pair to be tested can be preliminarily judged. In the high-voltage circuit shown in fig. 1, under the condition that the positive electrode relay K1, the negative electrode relay K2, the positive electrode grounding switch S1 and the negative electrode grounding switch S2 are all turned off, voltage detection can be respectively carried out at the positive electrode grounding voltage monitoring point 10 and the negative electrode grounding voltage monitoring point 20, a first grounding voltage group is obtained, the adhesion condition of the positive electrode relay K1 and the negative electrode relay K2 is preliminarily judged according to the voltage value of the first grounding voltage group, if the voltage value of the first grounding voltage group is small, the positive electrode relay K1 and the negative electrode relay K2 can be preliminarily considered not to be adhered, but further detection confirmation is required, if the voltage value of the first grounding voltage group is large, the adhered relays can be considered to be in the positive electrode relay K1 and the negative electrode relay K2, and corresponding alarm prompt can be carried out.
And step 120, when the first voltage group to ground does not meet the preset relay adhesion condition, controlling the relay to be tested to attract, and acquiring a second voltage group to ground at the rear end of the relay to be tested.
Specifically, when the first voltage-to-ground voltage group meets the preset relay adhesion condition, it may be basically determined that the relay pair to be tested is adhered, for example, a voltage value in the first voltage-to-ground voltage group is greater than a relay adhesion threshold value. When the first voltage-to-ground voltage group does not meet the preset relay adhesion condition, the relay pair to be tested may not be adhered, but the vehicle insulation resistance may fail to affect the measurement result, so that further detection is needed. At this time, the disconnection state of the ground switch in the high-voltage circuit can be maintained, the vehicle is controlled to be powered on at high voltage, that is, after the relay pair to be tested is attracted, the voltage to ground at the positive and negative electrode voltage to ground monitoring points is measured again respectively, so as to obtain a second voltage to ground group, and the voltage to ground monitoring point selected at this time can be consistent with the voltage to ground monitoring point selected in step 110. In the high-voltage circuit shown in fig. 1, voltage detection can be performed at the positive voltage-to-ground monitoring point 10 and the negative voltage-to-ground monitoring point 20 in a state where the positive grounding switch S1 and the negative grounding switch S2 are turned off and the positive relay K1 and the negative relay K2 are pulled in, respectively, to obtain a second voltage-to-ground group.
And step 130, attracting the anode grounding switch and the cathode grounding switch respectively to obtain a third voltage group and a fourth voltage group of the relay to be tested to the rear end.
Specifically, after a second voltage-to-ground voltage group after the vehicle is powered on at a high voltage is acquired, the positive electrode ground switch and the negative electrode ground switch can be respectively attracted, and the voltage-to-ground voltage of the positive electrode and the voltage-to-ground voltage of the negative electrode can be detected again at the same voltage-to-ground voltage monitoring point. After the anode grounding switch is attracted, the third grounding voltage group detected at the grounding voltage monitoring point can be acquired, and after the anode grounding switch is disconnected, the cathode grounding switch is attracted, and the fourth grounding voltage group detected at the grounding voltage monitoring point can be acquired. In the high-voltage circuit shown in fig. 1, the positive ground switch S1 and the negative ground switch S2 can be respectively pulled in when the positive relay K1 and the negative relay K2 are pulled in, voltage detection can be performed at the positive ground voltage monitoring point 10 and the negative ground voltage monitoring point 20, and a third ground voltage group and a fourth ground voltage group obtained through corresponding detection can be obtained.
And 140, determining whether the vehicle insulation resistance is invalid and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
Specifically, the resistance value condition of the vehicle insulation resistor can be determined by combining the resistance values of the protection resistor according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group, and if the vehicle insulation resistor is normal and the insulation resistor fails, the measurement influence of the insulation resistor failure on the first voltage-to-ground voltage group can be eliminated, namely, it can be determined that the relay to be tested is not adhered. If the insulation resistance of the vehicle is abnormal and the insulation resistance is possibly invalid, the alarm can be given to the situation, and the vehicle can be detected again after the problem of the insulation resistance of the vehicle is checked to be invalid.
The technical scheme of the embodiment includes that a first voltage-to-ground voltage group of a relay to be tested to the rear end is obtained by disconnecting all relays and grounding switches in a high-voltage circuit, when the first voltage-to-ground voltage group does not meet preset relay adhesion conditions, the relay to be tested is controlled to be attracted, a second voltage-to-ground voltage group of the relay to be tested to the rear end is obtained, a positive grounding switch and a negative grounding switch are respectively attracted, a third voltage-to-ground voltage group and a fourth voltage-to-ground voltage group of the relay to be tested to the rear end are obtained, whether a vehicle insulation resistor fails or not and whether the relay to be tested is adhered or not are determined according to the second voltage-to-ground voltage group, the second voltage-to-ground voltage group and the fourth voltage-to-ground voltage group, and the problems that the existing insulation resistor detection method and the relay adhesion detection method are completely independent, high, the vehicle insulation resistance failure detection method and the vehicle insulation resistance failure detection device have the advantages that the vehicle insulation resistance failure condition and the relay adhesion condition are detected simultaneously, the detection accuracy is improved, and the detection cost is saved.
Example two
Fig. 3 is a flowchart of a vehicle high-voltage circuit detection method according to a second embodiment of the present invention. On the basis of the embodiment, the vehicle high-voltage circuit detection method is further optimized.
As shown in fig. 3, the method specifically includes:
step 201, disconnecting all relays and grounding switches in the high-voltage circuit, and acquiring a first voltage-to-ground voltage group of the to-be-tested relay to the rear end, wherein the first voltage-to-ground voltage group comprises a first anode voltage-to-ground voltage and a first cathode voltage-to-ground voltage.
Specifically, a pair of relays to be detected can be determined as a pair of relays to be detected, and one voltage-to-ground monitoring point is respectively selected between the positive and negative relays to be detected and the high-voltage component connected with the positive and negative relays to be detected. After all relays and grounding switches in a vehicle high-voltage circuit are disconnected, a first positive-electrode voltage-to-ground voltage is acquired at a positive-electrode voltage-to-ground voltage monitoring point between a positive-electrode relay and a high-voltage component, and a first negative-electrode voltage-to-ground voltage is acquired at a negative-electrode voltage-to-ground voltage monitoring point between a negative-electrode relay and the high-voltage component. As shown in fig. 1, the high-voltage circuit can detect the resultant first set of voltage-to-ground, that is, the first positive voltage-to-ground voltage is obtained at the positive voltage-to-ground monitoring point 10 and the first negative voltage-to-ground voltage is obtained at the negative voltage-to-ground monitoring point 20, with the positive relay K1, the negative relay K2, the positive ground switch S1, and the negative ground switch S2 all open.
Step 202, judging whether the voltage of the first anode to ground is less than or equal to a preset relay adhesion voltage.
The preset relay adhesion voltage can be understood as a critical value for judging whether the relay is adhered or not, the critical value can be set and adjusted through real vehicle testing, and the value of the preset relay adhesion voltage can be 1V or 2V.
Specifically, after the first anode voltage to ground is obtained, the first anode voltage to ground may be compared with a preset relay adhesion voltage, and it is determined whether the first anode voltage to ground is less than or equal to the preset relay adhesion voltage, if yes, step 204 may be performed; otherwise, step 203 may be performed.
And 203, determining that the positive relay to be detected is adhered, and alarming for adhesion of the positive relay.
Specifically, when the voltage to ground of the first anode is larger than the preset relay adhesion voltage, it can be determined that the anode relay to be tested is adhered. After the adhesion of the positive relay to be detected is determined, the adhesion alarm of the positive relay can be carried out, and detection personnel are prompted to check and maintain the adhesion alarm.
And 204, judging whether the voltage to ground of the first negative electrode is less than or equal to a preset relay adhesion voltage.
Specifically, after the first negative electrode voltage to ground is obtained, the first negative electrode voltage to ground may be compared with a preset relay adhesion voltage, and it is determined whether the first negative electrode voltage to ground is less than or equal to the preset relay adhesion voltage, if yes, step 206 is performed; otherwise, go to step 205.
And step 205, determining the adhesion of the negative relay to be detected, and alarming the adhesion of the negative relay.
Specifically, when the voltage of the first negative electrode to ground is larger than the preset relay adhesion voltage, the adhesion of the negative electrode relay to be tested can be determined. After the adhesion of the negative relay to be detected is determined, the adhesion alarm of the negative relay can be carried out, and detection personnel are prompted to check and maintain the negative relay.
And step 206, controlling the relay pair to be tested to be attracted, and acquiring a second voltage group to ground at the rear end of the relay pair to be tested.
Specifically, in this embodiment, the second voltage-to-ground voltage group may include a second positive voltage-to-ground voltage and a second negative voltage-to-ground voltage. When the voltage of the first anode to ground and the voltage of the first cathode to ground are both less than or equal to the preset relay adhesion voltage, the relay to be tested can be preliminarily judged not to be adhered, but the influence of the failure problem of the vehicle insulation resistance on the measurement result is eliminated. At this time, the disconnection state of the ground switch in the high-voltage circuit can be maintained, the vehicle is controlled to be powered on at high voltage, that is, after the relay pair to be tested is attracted, the voltages to ground at the positive and negative electrode voltage to ground monitoring points are measured again respectively, so as to obtain a second voltage to ground group, and the voltage to ground monitoring point selected at this time can be consistent with the voltage to ground monitoring point selected in step 201. As shown in fig. 1, the high voltage circuit can detect the obtained second ground-to-ground voltage group in a state where the positive ground switch S1 and the negative ground switch S2 are opened and the positive relay K1 and the negative relay K2 are pulled in, that is, the second positive ground-to-ground voltage is obtained at the positive ground-to-ground voltage monitoring point 10 and the second negative ground-to-ground voltage is obtained at the negative ground-to-ground voltage monitoring point 20.
And step 207, attracting the anode grounding switch and the cathode grounding switch respectively to obtain a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested.
Specifically, in the present embodiment, the third voltage-to-ground group may include a third positive voltage-to-ground and a third negative voltage-to-ground, and the fourth voltage-to-ground group may include a fourth positive voltage-to-ground and a fourth negative voltage-to-ground. After a second voltage-to-ground voltage group after the vehicle is electrified at high voltage is acquired, the positive electrode grounding switch and the negative electrode grounding switch can be respectively attracted, and the voltage-to-ground of the positive electrode and the negative electrode is detected again at the same voltage-to-ground voltage monitoring point. The third voltage-to-ground voltage group detected at the voltage-to-ground monitoring point can be acquired after the positive grounding switch is attracted, and the fourth voltage-to-ground voltage group detected at the voltage-to-ground monitoring point can be acquired after the positive grounding switch is disconnected and the negative grounding switch is attracted. In the high-voltage circuit shown in fig. 1, in the state that the positive relay K1 and the negative relay K2 are pulled in, the positive grounding switch S1 is pulled in, the negative grounding switch S2 is opened, and the obtained third ground-to-ground voltage group is detected, that is, the third positive ground-to-ground voltage is obtained at the positive ground-to-ground voltage monitoring point 10 and the third negative ground-to-ground voltage is obtained at the negative ground-to-ground voltage monitoring point 20. After the third ground voltage group is obtained, the anode ground switch S1 is turned off, the cathode ground switch S2 is turned on, and the obtained fourth ground voltage group is detected, that is, the fourth anode ground voltage is obtained at the anode ground voltage monitoring point 10, and the fourth cathode ground voltage is obtained at the cathode ground voltage monitoring point 20.
Step 208, determining a positive insulation resistance according to the second voltage group to ground and the third voltage group to ground; and determining the cathode insulation resistance according to the second voltage group to ground and the fourth voltage group to ground.
Specifically, after the second voltage-to-ground group, the third voltage-to-ground group, and the fourth voltage-to-ground group are obtained, the positive insulation resistance and the negative insulation resistance can be respectively calculated by combining the resistance values of the pair of protection resistors. The positive insulation resistance may be calculated from the second voltage-to-ground voltage group and the third voltage-to-ground voltage group, and the negative insulation resistance may be calculated from the second voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
Illustratively, the voltage to ground of the second positive electrode is denoted as U2+And the voltage of the second negative electrode to ground is recorded as U2-And the voltage of the third anode to the ground is recorded as U3+And the voltage of the third negative electrode to ground is recorded as U3-And the voltage of the fourth positive electrode to the ground is recorded as U4+And the voltage of the fourth negative electrode to ground is recorded as U4-The resistance values of a pair of protection resistors are R0Then the positive insulation resistance may be
Figure BDA0002861008990000131
The insulation resistance of the negative electrode may be
Figure BDA0002861008990000132
And 209, judging whether the anode insulation resistance and the cathode insulation resistance are both larger than a preset insulation failure resistance value.
The preset insulation failure resistance value can be understood as a critical value for judging whether the vehicle insulation resistance is adhered or not, and the value can be set and adjusted through real vehicle testing.
Specifically, after the positive insulation resistance and the negative insulation resistance are obtained through calculation, the positive insulation resistance and the negative insulation resistance can be respectively compared with a preset insulation failure resistance value, whether the positive insulation resistance and the negative insulation resistance are both larger than the preset insulation failure resistance value is judged, and if yes, the step 210 can be performed; otherwise, step 211 may be performed. It can be understood that when the positive insulation resistance is not greater than the preset insulation failure resistance value, the possibility that the positive insulation resistance fails or the positive relay to be tested is adhered can be considered, and when the negative insulation resistance is not greater than the preset insulation failure resistance value, the possibility that the negative insulation resistance fails or the negative relay to be tested is adhered can be considered.
And step 210, determining that the vehicle insulation resistance is not invalid and the relay pair to be tested is not adhered.
Specifically, when the positive insulation resistance and the negative insulation resistance are both larger than the preset insulation failure resistance value, the first positive voltage-to-ground voltage and the first negative voltage-to-ground voltage are both smaller than or equal to the preset relay adhesion voltage in the previous step, and it can be determined that the vehicle insulation resistance is not failed and the relay to be tested is not adhered.
And step 211, determining that the insulation resistance of the vehicle fails.
Specifically, when the positive insulation resistance or the negative insulation resistance is less than or equal to the preset insulation failure resistance value, it may be determined that the vehicle insulation resistance is failed, and at this time, it may be continuously determined whether the relay is adhered, that is, step 212 may be performed.
And 212, determining the minimum value of the positive insulation resistance and the negative insulation resistance as a first detection resistance, and determining the sum of the positive insulation resistance and the negative insulation resistance as a second detection resistance.
Specifically, after the positive insulation resistance and the negative insulation resistance are calculated, the smaller value of the positive insulation resistance and the negative insulation resistance may be determined as a first detection resistance, and the sum of the positive insulation resistance and the negative insulation resistance may be determined as a second detection resistance.
Step 213, determining whether the ratio of the first detection resistor to the second detection resistor is greater than the ratio of the voltage detection precision to the battery output voltage.
The voltage detection precision value can be understood as the maximum value of the error between the value measured by the voltage detection device and the true value. The battery output voltage can be understood as the voltage between the positive and negative poles in the high-voltage circuit system.
Specifically, it may be determined whether the ratio of the first detection resistor to the second detection resistor is larger than the ratio of the voltage detection accuracy to the battery output voltage, if yes, step 215 may be performed; otherwise, step 214 may be performed.
And step 214, performing insulation failure alarm.
Specifically, when the ratio of the first detection resistor to the second detection resistor is smaller than or equal to the ratio of the voltage detection precision value to the battery output voltage, it can be considered that the error between the measurement result and the actual value is possibly smaller than or equal to the minimum measurement precision, and the possibility that whether the relay to be detected is adhered or not can not be judged due to insufficient measurement precision exists, so that the insulation failure alarm can be performed, related detectors are prompted to perform insulation failure maintenance, and after the insulation failure fault is eliminated, the adhesion condition of the relay to be detected can be detected again.
Step 215, determining that the relay pair to be tested is not adhered, and alarming for insulation failure.
Specifically, when the ratio of the first detection resistor to the second detection resistor is greater than the ratio of the voltage detection precision value to the battery output voltage, it can be determined that the pair of relays to be detected is not adhered, at this time, only the insulation failure alarm is performed, and the related detector is prompted to perform insulation failure maintenance, so that after the insulation failure fault is eliminated, the adhesion condition of the pair of relays to be detected can be redetected, namely, the step 201 is returned to perform detection again.
The technical scheme of the embodiment includes that a first voltage-to-ground voltage group of a relay to be tested to the rear end is obtained by disconnecting all relays and ground switches in a high-voltage circuit, the adhesion condition of the relay to be tested to the rear end is preliminarily judged according to the first voltage-to-ground voltage group, when the first voltage-to-ground voltage group meets a preset relay adhesion condition, the adhesion of the relay to be tested is determined, a relay adhesion alarm is carried out, when the first voltage-to-ground voltage group does not meet the preset relay adhesion condition, the relay to be tested is controlled to be attracted, a second voltage-to-ground voltage group of the relay to be tested to the rear end is obtained, an anode ground switch and a cathode ground switch are respectively attracted, a third voltage-to-ground voltage group and a fourth voltage-to-ground voltage group of the relay to be tested to the rear end are obtained, and a vehicle, whether the vehicle insulation resistance is invalid or not and whether the relay pair to be detected is adhered or not are judged, and when the vehicle insulation resistance is invalid, whether the relay pair to be detected is adhered or not can not be judged because the measurement precision is insufficient or not according to the detection precision value. The embodiment of the invention solves the problems that the existing insulation resistance detection method and the relay adhesion detection method are completely independent, the cost is high, the integration level is low, and the influence caused by another fault cannot be eliminated in each detection process.
EXAMPLE III
The vehicle high-voltage circuit detection device provided by the embodiment of the invention can execute the vehicle high-voltage circuit detection method provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. Fig. 4 is a block diagram of a vehicle high-voltage circuit detection device according to a third embodiment of the present invention, and as shown in fig. 4, the device includes: a first voltage acquisition module 310, a second voltage acquisition module 320, a third voltage acquisition module 330, and a fault determination module 340.
The first voltage obtaining module 310 is configured to disconnect all relays and ground switches in the high-voltage circuit, and obtain a first voltage-to-ground voltage group of the relay to be tested to the rear end.
And a second voltage obtaining module 320, configured to control the to-be-tested relay to pull in to obtain a second voltage-to-ground voltage group of the to-be-tested relay to the rear end when the first voltage-to-ground voltage group does not satisfy the preset relay adhesion condition.
And a third voltage obtaining module 330, configured to pull in the positive ground switch and the negative ground switch respectively, and obtain a third voltage group and a fourth voltage group of the relay to be tested to the rear end.
And a fault determination module 340, configured to determine whether a vehicle insulation resistance fails and whether the relay pair to be tested is stuck according to the second voltage group to ground, the third voltage group to ground, and the fourth voltage group to ground.
The technical scheme of the embodiment includes that a first voltage-to-ground voltage group of a relay to be tested to the rear end is obtained by disconnecting all relays and grounding switches in a high-voltage circuit, when the first voltage-to-ground voltage group does not meet preset relay adhesion conditions, the relay to be tested is controlled to be attracted, a second voltage-to-ground voltage group of the relay to be tested to the rear end is obtained, a positive grounding switch and a negative grounding switch are respectively attracted, a third voltage-to-ground voltage group and a fourth voltage-to-ground voltage group of the relay to be tested to the rear end are obtained, whether a vehicle insulation resistor fails or not and whether the relay to be tested is adhered or not are determined according to the second voltage-to-ground voltage group, the second voltage-to-ground voltage group and the fourth voltage-to-ground voltage group, and the problems that the existing insulation resistor detection method and the relay adhesion detection method are completely independent, high, the vehicle insulation resistance failure detection method and the vehicle insulation resistance failure detection device have the advantages that the vehicle insulation resistance failure condition and the relay adhesion condition are detected simultaneously, the detection accuracy is improved, and the detection cost is saved.
Optionally, the first voltage-to-ground group includes a first positive voltage-to-ground and a first negative voltage-to-ground;
correspondingly, the first voltage-to-ground voltage group does not satisfy the preset relay adhesion condition, and the method comprises the following steps:
and when the first anode voltage to ground and the first cathode voltage to ground are both less than or equal to a preset relay adhesion voltage, determining that the first voltage to ground group does not meet the preset relay adhesion condition.
Optionally, the apparatus further includes a sticking failure determination module 350, where the sticking failure determination module 350 is configured to:
when the voltage of the first anode to earth is larger than the preset relay adhesion voltage, determining that the anode relay to be tested is adhered, and alarming for adhesion of the anode relay;
and when the voltage of the first negative electrode to ground is greater than the preset relay adhesion voltage, determining that the negative electrode relay to be tested is adhered, and alarming for adhesion of the negative electrode relay.
Optionally, the fault determining module 340 is specifically configured to:
determining a positive insulation resistance according to the second voltage group to ground and the third voltage group to ground;
determining a negative insulation resistance according to the second voltage group to ground and the fourth voltage group to ground;
and when the positive insulation resistance and the negative insulation resistance are both larger than a preset insulation failure resistance value, determining that the vehicle insulation resistance is not failed and the relay pair to be tested is not adhered.
Optionally, the fault determination module 340 is further configured to:
when the positive insulation resistance or the negative insulation resistance is less than or equal to the preset insulation failure resistance value, determining that the vehicle insulation resistance is failed;
determining the minimum value of the positive insulation resistance and the negative insulation resistance as a first detection resistance, and determining the sum of the positive insulation resistance and the negative insulation resistance as a second detection resistance;
and if the ratio of the first detection resistor to the second detection resistor is larger than the ratio of the voltage detection precision value to the battery output voltage, determining that the relay pair to be detected is not adhered.
The technical scheme of the embodiment includes that a first voltage-to-ground voltage group of a relay to be tested to the rear end is obtained by disconnecting all relays and ground switches in a high-voltage circuit, the adhesion condition of the relay to be tested to the rear end is preliminarily judged according to the first voltage-to-ground voltage group, when the first voltage-to-ground voltage group meets a preset relay adhesion condition, the adhesion of the relay to be tested is determined, a relay adhesion alarm is carried out, when the first voltage-to-ground voltage group does not meet the preset relay adhesion condition, the relay to be tested is controlled to be attracted, a second voltage-to-ground voltage group of the relay to be tested to the rear end is obtained, an anode ground switch and a cathode ground switch are respectively attracted, a third voltage-to-ground voltage group and a fourth voltage-to-ground voltage group of the relay to be tested to the rear end are obtained, and a vehicle, whether the vehicle insulation resistance is invalid or not and whether the relay pair to be detected is adhered or not are judged, and when the vehicle insulation resistance is invalid, whether the relay pair to be detected is adhered or not can not be judged because the measurement precision is insufficient or not according to the detection precision value. The embodiment of the invention solves the problems that the existing insulation resistance detection method and the relay adhesion detection method are completely independent, the cost is high, the integration level is low, and the influence caused by another fault cannot be eliminated in each detection process.
Example four
Fig. 5 is a block diagram of a vehicle according to a fourth embodiment of the present invention, as shown in fig. 4, the vehicle includes a controller 410, a memory 420, and a vehicle high-voltage circuit 430; the number of controllers 410 in the vehicle may be one or more, and one controller 410 is illustrated in fig. 4; the controller 410, the memory 420, and the vehicle high voltage circuit 430 in the vehicle may be connected by a bus or other means, as exemplified by the bus connection in fig. 4.
The memory 420, which is a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the vehicle high-voltage circuit detection method in the embodiment of the present invention (e.g., the first voltage acquisition module 310, the second voltage acquisition module 320, the third voltage acquisition module 330, and the fault determination module 340 in the vehicle high-voltage circuit detection apparatus). The controller 410 executes various functional applications and data processing of the vehicle by executing software programs, instructions and modules stored in the memory 420, that is, implements the vehicle high-voltage circuit detection method described above.
The memory 420 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 420 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 420 may further include memory located remotely from the controller 410, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The vehicle high-voltage circuit 430 may include a power battery, a pair of ground switches, a pair of protection resistors, n sets of relay pairs, and m high-voltage components, where n and m are each integers greater than or equal to 1. The grounding switch can comprise a positive grounding switch and a negative grounding switch, the positive grounding switch can be respectively connected with the positive electrode of the power battery and the protection resistor, and the negative grounding switch can be respectively connected with the negative electrode of the power battery and the protection resistor; the relay pair can include positive relay and negative relay, and the front end of positive relay and the front end of negative relay can link to each other with power battery's positive pole and negative pole respectively, and the rear end of positive relay and the rear end of negative relay can link to each other with high-voltage component respectively.
EXAMPLE five
Embodiments of the present invention also provide a storage medium containing computer-executable instructions which, when executed by a computer processor, perform a vehicle high-voltage circuit detection method, the method comprising:
disconnecting all relays and grounding switches in the high-voltage circuit to obtain a first voltage-to-ground voltage group of the relay to be tested to the rear end;
when the first voltage group to earth does not meet the preset relay adhesion condition, controlling the relay to be tested to attract, and acquiring a second voltage group to earth at the rear end of the relay to be tested;
respectively attracting the anode grounding switch and the cathode grounding switch to obtain a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested;
and determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the method operations described above, and may also perform related operations in the vehicle high-voltage circuit detection method provided by any embodiments of the present invention.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which can be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the methods according to the embodiments of the present invention.
It should be noted that, in the embodiment of the vehicle high-voltage circuit detection device, the included units and modules are only divided according to the functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present invention.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (10)

1. A vehicle high-voltage circuit detection method is applied to a vehicle high-voltage circuit, wherein the vehicle high-voltage circuit comprises a power battery, a pair of grounding switches, a pair of protective resistors, n groups of relay pairs and m high-voltage components; the grounding switch comprises a positive grounding switch and a negative grounding switch, the positive grounding switch is respectively connected with the positive pole of the power battery and the protection resistor, and the negative grounding switch is respectively connected with the negative pole of the power battery and the protection resistor; the relay pair comprises a positive relay and a negative relay, the front end of the positive relay and the front end of the negative relay are respectively connected with the positive pole and the negative pole of the power battery, and the rear end of the positive relay and the rear end of the negative relay are respectively connected with the high-voltage component; wherein n and m are integers greater than or equal to 1;
characterized in that the method comprises:
disconnecting all relays and grounding switches in the high-voltage circuit to obtain a first voltage-to-ground voltage group of the relay to be tested to the rear end;
when the first voltage group to earth does not meet the preset relay adhesion condition, controlling the relay to be tested to attract, and acquiring a second voltage group to earth at the rear end of the relay to be tested;
respectively attracting the anode grounding switch and the cathode grounding switch to obtain a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested;
and determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
2. The vehicle high-voltage circuit detection method according to claim 1,
the first voltage-to-ground voltage group comprises a first anode voltage-to-ground voltage and a first cathode voltage-to-ground voltage;
correspondingly, the first voltage-to-ground voltage group does not satisfy the preset relay adhesion condition, and the method comprises the following steps:
and when the first anode voltage to ground and the first cathode voltage to ground are both less than or equal to a preset relay adhesion voltage, determining that the first voltage to ground group does not meet the preset relay adhesion condition.
3. The vehicle high voltage circuit detection method according to claim 2, further comprising:
when the voltage of the first anode to earth is larger than the preset relay adhesion voltage, determining that the anode relay to be tested is adhered, and alarming for adhesion of the anode relay;
and when the voltage of the first negative electrode to ground is greater than the preset relay adhesion voltage, determining that the negative electrode relay to be tested is adhered, and alarming for adhesion of the negative electrode relay.
4. The vehicle high-voltage circuit detection method according to claim 1, wherein the determining whether a vehicle insulation resistance is failed and the relay pair to be tested is stuck according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group comprises:
determining a positive insulation resistance according to the second voltage group to ground and the third voltage group to ground;
determining a negative insulation resistance according to the second voltage group to ground and the fourth voltage group to ground;
and when the positive insulation resistance and the negative insulation resistance are both larger than a preset insulation failure resistance value, determining that the vehicle insulation resistance is not failed and the relay pair to be tested is not adhered.
5. The vehicle high voltage circuit detection method according to claim 4, further comprising:
when the positive insulation resistance or the negative insulation resistance is less than or equal to the preset insulation failure resistance value, determining that the vehicle insulation resistance is failed;
determining the minimum value of the positive insulation resistance and the negative insulation resistance as a first detection resistance, and determining the sum of the positive insulation resistance and the negative insulation resistance as a second detection resistance;
and if the ratio of the first detection resistor to the second detection resistor is larger than the ratio of the voltage detection precision value to the battery output voltage, determining that the relay pair to be detected is not adhered.
6. A detection device for performing the method of any one of claims 1 to 5, comprising:
the first voltage acquisition module is used for disconnecting all relays and grounding switches in the high-voltage circuit and acquiring a first voltage-to-ground voltage group of the relay to be tested to the rear end;
the second voltage acquisition module is used for controlling the relay to be tested to be attracted when the first voltage group to be earthed does not meet the preset relay adhesion condition, and acquiring a second voltage group to be earthed at the rear end of the relay to be tested;
the third voltage acquisition module is used for attracting the anode grounding switch and the cathode grounding switch respectively to acquire a third voltage group to ground and a fourth voltage group to ground of the rear end of the relay to be tested;
and the fault determination module is used for determining whether the vehicle insulation resistance fails and whether the relay pair to be tested is adhered according to the second voltage-to-ground voltage group, the third voltage-to-ground voltage group and the fourth voltage-to-ground voltage group.
7. The detection apparatus according to claim 6, wherein the failure determination module is specifically configured to:
determining a positive insulation resistance according to the second voltage group to ground and the third voltage group to ground;
determining a negative insulation resistance according to the second voltage group to ground and the fourth voltage group to ground;
and when the positive insulation resistance and the negative insulation resistance are both larger than a preset insulation failure resistance value, determining that the vehicle insulation resistance is not failed and the relay pair to be tested is not adhered.
8. The detection apparatus of claim 7, wherein the fault determination module is further configured to:
when the anode insulation resistance or the cathode insulation resistance is smaller than the preset insulation failure resistance value, determining that the vehicle insulation resistance is failed;
determining the minimum value of the positive insulation resistance and the negative insulation resistance as a first detection resistance, and determining the sum of the positive insulation resistance and the negative insulation resistance as a second detection resistance;
and if the ratio of the first detection resistor to the second detection resistor is larger than the ratio of the voltage detection precision value to the battery output voltage, determining that the relay pair to be detected is not adhered.
9. A vehicle, characterized in that the vehicle comprises:
one or more controllers;
a memory for storing one or more programs;
the vehicle high-voltage circuit comprises a power battery, a pair of grounding switches, a pair of protective resistors, n groups of relay pairs and m high-voltage components, wherein n and m are integers which are more than or equal to 1;
when the one or more programs are executed by the one or more controllers, cause the one or more controllers to implement the vehicle high voltage circuit detection method as recited in any one of claims 1-5.
10. A storage medium containing computer-executable instructions for performing the vehicle high voltage circuit detection method as recited in any one of claims 1 to 5 when executed by a computer processor.
CN202011563434.4A 2020-12-25 2020-12-25 Vehicle high-voltage circuit detection method and device, vehicle and storage medium Pending CN112731088A (en)

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