The invention relates to an adhesion detection circuit and detection method of an electric vehicle charging relay. The detection circuit comprises a high-voltage electric control integrated unit and a battery pack, the high-voltage electric control integrated unit comprises a direct-current converter and a charging relay, the high-voltage electric control integrated unit is electrically connected with the battery pack through a high-voltage wire harness, and the direct-current converter is used for detecting voltages at the two ends of the charging relay; the battery pack comprises a battery management system, the direct current converter and the battery management system are connected through a bus, and the battery management system is used for controlling the state of the charging relay and reporting the state of the charging relay and the battery voltage of the battery pack to the bus; and the direct current converter is further used for receiving the state of the charging relay and the battery voltage from the bus, and when the state is the off state and the voltage is equal to the battery voltage, it is judged that the charging relay adheres. The method has the advantage of low cost.
本发明涉及一种电动汽车充电继电器的粘连检测电路及检测方法。该检测电路包括:高压电控集成单元和电池包,其中,高压电控集成单元中包括直流转换器和充电继电器,高压电控集成单元通过高压线束与电池包电连接,直流转换器用于检测充电继电器两端的电压;以及电池包中包括电池管理系统,直流转换器和电池管理系统通过总线连接,电池管理系统用于控制充电继电器的状态,并将充电继电器的状态和电池包的电池电压上报至总线;直流转换器还用于从总线接收充电继电器的状态和电池电压,当状态为断开状态并且电压等于电池电压时,判断充电继电器发生粘连。本发明具有成本低的优点。
Adhesion detection circuit and detection method of electric vehicle charging relay
电动汽车充电继电器的粘连检测电路及检测方法
2021-11-02
Patent
Electronic Resource
Chinese
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