The invention discloses a method for improving the durability of a fuel cell system, and the method comprises the steps: carrying out all-directional working condition testing on a specified vehicle which needs to be matched with the fuel cell system, and collecting, sorting and analyzing the required power of the whole vehicle under each working condition point of the vehicle; under the condition that the required power of the whole vehicle is small, when the fuel cell operates at the lowest power and still exceeds the required power of the whole vehicle, and the SOC of the vehicle-mounted lithium battery is close to the full state, the high-voltage contactor K1 is opened, active discharging is conducted on the vehicle-mounted lithium battery through the self-consuming module, and the discharging power meets the requirement that the working voltage of the fuel cell is lower than 0.85 V. In the invention, a group of resistance-type self-consuming modules are connected in parallel at the rear end of the lithium battery pack of the whole vehicle of the vehicle fuel cell system, and the lithium battery pack is actively discharged through the self-consuming modules, so that a high potential phenomenon generated when the fuel cell is in low-load operation is avoided; and meanwhile, the phenomenon that the fuel cell is frequently started due to short-time parking is avoided.
本发明公开了一种提高燃料电池系统耐久性的方法,方法包括:对所要匹配燃料电池系统的指定车辆进行全方位工况测试,汇集并整理分析该车辆在各个工况点下,整车的需求功率;在整车需求功率较小的情况下,燃料电池以最低功率运行仍远远超过整车的需求功率,且车载锂电池的SOC接近满状态时,打开高压接触器K1,通过自耗模块对车载锂电池进行主动放电,放电功率满足燃料电池工作电压低于0.85V。本发明中,在车辆燃料电池系统的整车锂电池包后端,并接一组电阻式自耗模块,通过自耗模块对锂电池包进行主动放电,从而避免了燃料电池处于低载运行时所产生的高电位现象,且同时避免了因短时停车导致的燃料电池频繁启动的现象。
Method for improving durability of fuel cell system
一种提高燃料电池系统耐久性的方法
2023-10-13
Patent
Electronic Resource
Chinese
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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