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Insulation detection method and device for fuel cell vehicle, and vehicle

A fuel cell vehicle and fuel cell technology, applied in the field of vehicles, can solve the problems of endangering the personal safety of people in the vehicle and reducing insulation resistance, etc.

Active Publication Date: 2021-04-30
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the daily use of the car, the aging or damp of the high-voltage cable may cause the insulation resistance between the positive and negative leads of the power battery and the chassis of the car to decrease, resulting in leakage, which seriously endangers the personal safety of the people in the car

Method used

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  • Insulation detection method and device for fuel cell vehicle, and vehicle
  • Insulation detection method and device for fuel cell vehicle, and vehicle
  • Insulation detection method and device for fuel cell vehicle, and vehicle

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Embodiment Construction

[0027] It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0028] The battery management system of the fuel cell vehicle is equipped with an insulation detection module. After the high voltage of the vehicle is established, the battery management system performs insulation detection on the high voltage network of the vehicle in real time. When the detected insulation resistance value is lower than the threshold value, the vehicle control The device can respond in a timely manner.

[0029] Because the response speed of fuel cell power is too slow to respond to the changing power requests of car drivers in time, fuel cell vehicles currently use the parallel output of fuel cells and lithium batteries. The fuel cell outputs at a constant power. When the driver requests power greater than the output of the fuel cell, the lithium battery discharges, otherwise the lithium batt...

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Abstract

The invention relates to the technical field of vehicles, and provides an insulation detection method and device for a fuel cell vehicle, and the vehicle, and the method comprises the steps: judging whether the vehicle is started; under the condition that the vehicle is started, executing the following steps: controlling a battery management system to execute first insulation detection; detecting whether the fuel cell is started; and under the condition that the fuel cell is not started, controlling the fuel cell control unit to execute second insulation detection, and an insulation detection module used for executing insulation detection on the fuel cell is arranged in the fuel cell control unit of the vehicle. According to the method and the device, potential safety hazards caused by internal insulation faults of the fuel cell can be effectively avoided.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an insulation detection method and device for a fuel cell vehicle, and the vehicle. Background technique [0002] Fuel cell vehicles convert hydrogen energy into electrical energy through chemical reactions for driving, and the voltage of their battery packs far exceeds the safe voltage that the human body can withstand. During the daily use of the car, the aging or damp of the high-voltage cable may cause the insulation resistance between the positive and negative leads of the power battery and the chassis of the car to decrease, resulting in leakage, which seriously endangers the personal safety of the people in the car. In order to ensure the electrical safety of the whole vehicle, reasonable insulation detection in fuel cell vehicles is the key to ensure the safety of people in the vehicle. Contents of the invention [0003] In view of this, the present invention aims to ...

Claims

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Application Information

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IPC IPC(8): B60L58/30B60L3/00G01R31/12
CPCB60L58/30B60L3/0069B60L3/0053G01R31/1227Y02T90/40B60L50/75B60L58/40B60L3/04B60L2250/10B60L50/15B60L58/27B60L58/26G01R27/025G01R31/007G01R31/36Y02E60/50
Inventor 胡志敏
Owner GREAT WALL MOTOR CO LTD