The invention discloses a vehicle-mounted charging system and a state detection method of an input relay thereof, and the method comprises the steps: in response to a received input relay state detection instruction, a control unit detects a first voltage U1 of the output side of the input relay and a second voltage U2 of the input side of the output relay, a voltage difference Ue between the first voltage U1 and the second voltage U2 is obtained, and the control unit determines the state of the input relay based on the voltage difference Ue and the voltage difference holding time Te of the voltage difference Ue; the state comprises an adhesion state or a disconnection state. According to the vehicle-mounted charging system, the circuit in the voltage conversion unit is matched with adhesion detection of the input relay, so that a hardware circuit does not need to be additionally designed, the size of the vehicle-mounted charging system is reduced, the power density of the vehicle-mounted charging system is improved, and the production cost and the maintenance cost are reduced.
本发明公开了一种车载充电系统及其输入继电器的状态检测方法,包括:响应于接收到的输入继电器状态检测指令,控制单元检测所述输入继电器输出侧的第一电压U1,以及所述输出继电器输入侧的第二电压U2,获得所述第一电压U1与所述第二电压U2的电压差Ue,所述控制单元基于所述电压差Ue以及所述电压差Ue的电压差维持时间Te,确定所述输入继电器的状态;所述状态包括粘连状态或断开状态。本发明运用电压变换单元内的电路来配合输入继电器的粘连检测,这样无需额外设计硬件电路,进而减小车载充电系统的体积,提高车载充电系统的功率密度,减少生产成本以及维护成本。
Vehicle-mounted charging system and state detection method of input relay of vehicle-mounted charging system
车载充电系统及其输入继电器的状态检测方法
2024-08-23
Patent
Electronic Resource
Chinese
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