The invention relates to a leakage prediction method and device for a hydrogen system of a fuel cell vehicle, and belongs to the field of hydrogen system leakage monitoring. According to the method, the high pressure PH0, the low pressure PL0 and the temperature T0 of a hydrogen system when a fuel cell is closed are detected, the high pressure, the low pressure and the temperature of the hydrogen system at the current moment can be detected in real time in the parking process and after a vehicle is powered on next time, the low pressure value at the current moment is compared with the low pressure value PL0, and therefore the fuel cell fuel cell can be obtained. Whether the hydrogen micro-leakage occurs in the vehicle is reliably judged, the problem that the hydrogen micro-leakage cannot be detected after the fuel cell is shut down or the vehicle is parked for a long time is solved, and the hydrogen leakage is judged by utilizing the difference value of the two residual hydrogen masses. The detection principle is simple, implementation is easy, fault judgment when the hydrogen leakage concentration of the fuel cell vehicle does not reach the alarm threshold value is achieved, the micro-leakage fault of hydrogen can be detected in time, the safety risk is reduced, the vehicle safety is improved, and the market application prospect is high.
本发明涉及一种燃料电池汽车氢系统的泄漏预测方法及装置,属于氢系统泄漏监测领域。该方法通过检测燃料电池关闭时氢系统的高压压力PH0、低压压力PL0、温度T0,在本次停车过程中和下次车辆上电后,能够通过实时检测氢系统当前时刻的高压压力、低压压力和温度,通过比较当前时刻的低压压力值和低压压力值PL0的大小,可靠的判断车辆是否发生氢气微泄漏,解决燃料电池停机或车辆长时间停放后氢气产生微泄漏无法检测的问题,利用两次剩余氢气质量的差值判断氢气泄漏。本发明的检测原理简单,容易实现,解决燃料电池车辆泄漏氢气浓度未达到报警阈值时的故障判断,可及时检测氢气的微泄漏故障,降低安全风险,提高了车辆安全性,具有较高的市场应用前景。
Leakage prediction method and device for hydrogen system of fuel cell vehicle
一种燃料电池汽车氢系统的泄漏预测方法及装置
2022-06-10
Patent
Elektronische Ressource
Chinesisch
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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