A fault diagnosis apparatus for a fuel cell electric vehicle and a method thereof are provided. The apparatus includes: a main relay connected to a fuel cell stack; a power converter connected to the main relay; one end of the heater relay is connected with the fuel cell stack and the main relay, and the other end of the heater relay is connected with a cathode oxygen consumption (COD) heater; and a fuel cell control unit (FCU) connected with the main relay, the power converter, and the heater relay. When the vehicle enters a shutdown procedure, the FCU diagnoses a failure of the main relay based on a change amount of a stack voltage according to which the heater relay is controlled to be turned off and turned on, and a power of the power converter according to variable control of a voltage of the power converter, and outputs a diagnosis result.
提供了用于燃料电池电动车辆的故障诊断装置及其方法。该装置包括:主继电器,连接到燃料电池堆;功率转换器,连接到主继电器;加热器继电器,一端连接燃料电池堆和主继电器,且另一端连接阴极氧消耗(COD)加热器;以及燃料电池控制单元(FCU),与主继电器、功率转换器和加热器继电器相连。当车辆进入关闭程序时,FCU基于根据控制加热器继电器断开和接通的堆电压的变化量、以及根据功率转换器的电压的可变控制的功率转换器的功率,来诊断主继电器的故障,并输出诊断结果。
Fault diagnosis apparatus for fuel cell electric vehicle and method thereof
用于燃料电池电动车辆的故障诊断装置及其方法
2022-06-07
Patent
Elektronische Ressource
Chinesisch
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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 |
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