The invention provides a relay adhesion detection circuit, a relay adhesion detection method and a vehicle. The circuit comprises a controller, two comparator modules and a voltage division circuit, the voltage division circuit is connected to positive and negative buses at the two ends of the two relays so as to divide the voltage at the two ends of the relays, and the two comparator modules are connected to the voltage division circuit and the controller respectively; the first input ends of the two comparator modules receive divided voltages at the two ends of the relay respectively, the second input ends of the two comparator modules receive reference signals sent by the controller respectively, and the output ends of the two comparator modules output comparison signals to the controller; the controller is configured to generate a reference signal, send the reference signal to the comparator module, receive a comparison signal output by the comparator module and judge the adhesion state of the relay based on the duty ratio of the comparison signal. The problems that the cost is too high due to the adoption of an isolation operational amplifier, and the judgment standard of adhesion detection needs to be adjusted according to the bus voltage change are solved.
本发明提供一种继电器粘连检测电路、继电器粘连检测方法和车辆,该电路包括:控制器、两个比较器模块和分压电路;分压电路连接于两个继电器的两端的正负母线,以对继电器两端的电压进行分压,两个比较器模块分别连接于分压电路和控制器;两个比较器模块的第一输入端分别接收继电器两端的分压电压,两个比较器模块的第二输入端分别接收控制器发出的参考信号,两个比较器模块的输出端输出比较信号至控制器;控制器配置为生成参考信号并发送至比较器模块,以及接收比较器模块输出的比较信号,基于比较信号的占空比判断继电器的粘连状态。本发明解决了采用隔离运放导致成本过高,以及粘连检测的判断标准需根据母线电压变化进行调整的问题。
Relay adhesion detection circuit, relay adhesion detection method and vehicle
继电器粘连检测电路、继电器粘连检测方法和车辆
2025-03-25
Patent
Electronic Resource
Chinese
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