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Insulation detection method and device for electric vehicle

A technology of electric vehicles and detection methods, which is applied in the directions of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as calculation deviation, insulation or voltage jump, and influence on the accuracy of insulation resistance measurement, etc., to achieve Effects of preventing calculation deviation and improving accuracy

Pending Publication Date: 2022-07-15
华人运通(山东)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The insulation resistance detection method described above still has calculation deviations caused by insulation or voltage jumps during the detection process, which affects the accuracy of the insulation resistance measurement of electric vehicles

Method used

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  • Insulation detection method and device for electric vehicle
  • Insulation detection method and device for electric vehicle
  • Insulation detection method and device for electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] See figure 1 and 2 , an embodiment of the present invention provides an insulation detection method for an electric vehicle, including:

[0059] S1: Collect the first voltage parameter of the vehicle-mounted rechargeable energy storage system to the electric platform; wherein, the first voltage parameter includes: the first positive voltage between the positive electrode of the vehicle-mounted rechargeable energy storage system and the electric platform , the first negative electrode voltage between the negative electrode of the vehicle-mounted rechargeable energy storage system and the electrical platform, and the first energy storage voltage between the positive and negative electrodes of the vehicle-mounted rechargeable energy storage system;

[0060] S2: After connecting the first resistor between the vehicle-mounted rechargeable energy storage system and the point platform, collect the second voltage parameter of the vehicle-mounted rechargeable energy storage sys...

Embodiment 2

[0103] see image 3 , an embodiment of the present invention provides an insulation detection device for an electric vehicle, including:

[0104] The first voltage parameter collection module 1 is used to collect the first voltage parameter of the electric platform of the vehicle-mounted rechargeable energy storage system; wherein, the first voltage parameter includes: the positive electrode of the vehicle-mounted rechargeable energy storage system and the electric power The first positive voltage between the platforms, the first negative voltage between the negative electrode of the vehicle-mounted rechargeable energy storage system and the electrical platform, and the first energy storage between the positive and negative electrodes of the vehicle-mounted rechargeable energy storage system Voltage;

[0105] The second voltage parameter collection module 2 is configured to collect the second voltage of the vehicle-mounted rechargeable energy storage system to the electrical ...

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Abstract

The invention discloses an insulation detection method and device for an electric vehicle. The method comprises the steps that a first voltage parameter of a vehicle-mounted rechargeable energy storage system to an electric platform is collected; after a first resistor is connected between the vehicle-mounted rechargeable energy storage system and the point platform, a second voltage parameter of the vehicle-mounted rechargeable energy storage system to the point platform is collected; after the first resistor is disconnected, acquiring a third voltage parameter of the vehicle-mounted rechargeable energy storage system to the electric platform; according to the first voltage parameter, the second voltage parameter, the third voltage parameter and the first resistance, calculating an insulation resistance parameter of the vehicle-mounted rechargeable energy storage system to the electric platform; the third time of sampling is carried out after the first resistor is disconnected, and the insulation resistance parameter of the vehicle-mounted rechargeable energy storage system to the electric platform is calculated based on the voltage parameters sampled for three times, so that calculation deviation caused by insulation or voltage jump and insulation resistance jump in the detection process can be prevented, and the accuracy of insulation resistance measurement of the electric vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of insulation resistance detection of electric vehicles, in particular to a method and device for insulation detection of electric vehicles. Background technique [0002] With the rapid development of electric vehicles, in order to meet certain power requirements, electric vehicles need to use multiple batteries in series in groups. The total voltage of the battery group is generally higher than 100V, and even up to 800V. Therefore, accurate and real-time monitoring of the on-board Rechargeable Energy Storage System (REESS, On-board Rechargeable Energy Storage System) is of great significance to the insulation performance of the vehicle electrical platform to ensure the safety of drivers and passengers, the normal operation of electrical equipment and the safe operation of vehicles. . [0003] At present, for the insulation testing of electric vehicles, the following methods are generally used for testing: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
CPCG01R27/025
Inventor 马列斯王宏伟
Owner 华人运通(山东)科技有限公司
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