A hydrogen fuel cell vehicle hydrogen leakage detection control method and system

Abstract

The invention discloses a hydrogen leakage detection and control method of a hydrogen fuel cell vehicle and a system thereof. The detection and control method includes a start-up process control method, a driving process control method, and a parking state control method. The direct start mode and segmented start mode in the start process control method both detect the hydrogen leakage concentration HC, and when the concentration exceeds the safety limit H1, the IGN contactor will be disconnected, and the vehicle will fail to start. During the driving process, the hydrogen leakage concentration HC is detected in real time. When the concentration exceeds the safety limit H1, all hydrogen bottle valves are closed, the fuel cell is shut down, and the vehicle automatically switches to pure electric mode. During the parking process, the hydrogen leakage concentration HC in the medium will be detected regularly, and the data will be uploaded to TBOX when it is greater than the safety limit concentration H1. The invention has a hydrogen leakage detection and control strategy in the process of starting, driving and parking of the hydrogen fuel vehicle to ensure that the hydrogen concentration of the vehicle is in a safe state and avoid safety accidents caused by excessive hydrogen concentration.

Description

technical field [0001] The invention relates to a hydrogen fuel cell vehicle leakage detection control, in particular to a hydrogen fuel cell vehicle hydrogen leakage detection control method and system thereof. Background technique [0002] As the whole world vigorously advocates the development of hydrogen energy strategy, a wave of hydrogen fuel cell vehicles has been set off at home and abroad, and a large number of hydrogen fuel cell vehicles have been gradually developed and launched on the market. [0003] At present, there are many dew points in the hydrogen of 70MPa fuel cell vehicles from the hydrogen refueling port to the hydrogen storage bottle, from the hydrogen storage bottle to the stack, including leakage between the hydrogen storage bottle and the bottle valve, between the valve and the valve, and the pipe interface. Risk, and the current hydrogen storage system is rigidly connected, in the harsh road environment, deformation occurs, aggravating the possibil...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many dew points in the hydrogen of 70MPa fuel cell vehicles from the hydrogen refueling port to the hydrogen storage bottle, from the hydrogen storage bottle to the stack, including leakage between the hydrogen storage bottle and the bottle valve, between the valve and the valve, and the pipe interface. Risk, and the current hydrogen storage system is rigidly connected, in the harsh road environment, deformation occurs, increasing the possibility of leakage

At present, the focus of hydrogen leakage detection is the detection of the concentration value during driving, but there is a lack of corresponding safety measures during the start and stop periods. Even if the concentration value is detected to be too high and the shutdown process is performed, the location of the high concentration cannot be directly determined

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