The invention relates to the technical field of vehicle control, and provides a high-voltage power-off method of a fuel cell vehicle and a battery system. The high-voltage power-off method comprises the steps that when the temperature of an electric pile of a fuel cell is within a normal temperature range, the power supply state of the fuel cell is obtained from an FCU, wherein the power supply state is configured to be in a closed state by the FCU when the output current of the fuel cell is smaller than or equal to a set current threshold value, and the set current threshold value is a critical value representing whether the fuel cell completely releases the electric quantity or not; and when the fuel cell is in the closed state, a power-off command for high-voltage power-off is sent to aBMS of the vehicle. The problem that high-voltage components of a fuel cell system work abnormally due to the fact that power generated in the shutdown process of the fuel cell system has no use is effectively solved.
本发明涉及车辆控制技术领域,提供一种燃料电池车辆的高压下电方法及电池系统。本发明所述的高压下电方法包括:在燃料电池的电堆温度处于正常温度范围时,从FCU获取所述燃料电池的供电状态,其中所述供电状态由所述FCU在所述燃料电池的输出电流小于或等于设定电流阈值时配置为关闭状态,且所述设定电流阈值为表示所述燃料电池是否释放完电量的临界值;以及在所述燃料电池为所述关闭状态时,向车辆的BMS发送进行高压下电的下电命令。本发明有效地解决了燃料电池系统关机过程中发的电无处使用而导致的燃料电池系统高压部件工作异常的问题。
High-voltage power-off method of fuel cell vehicle and battery system
燃料电池车辆的高压下电方法及电池系统
2020-12-08
Patent
Electronic Resource
Chinese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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