The invention relates to a relay state detection circuit and detection method and a battery management system, and relates to the technical field of automobiles, the relay state detection circuit detects the on-off of a relay in real time through a voltage acquisition module and a plurality of voltage division circuits, and the cost is reduced at the same time. The relay state detection circuit comprises a power battery pack, a plurality of relays, a voltage acquisition module, a plurality of voltage division circuits and a controller, the relays are sequentially connected between the positive electrode and the negative electrode of the power battery pack in series. The two ends of the relay are respectively provided with a detection point. The controller is electrically connected with the voltage acquisition module, and is configured to receive the voltage value of the first voltage end of the voltage division circuit acquired by the voltage acquisition module, and to determine the voltage value of the reference voltage end of the voltage division circuit according to the voltage value of the first voltage end of the voltage division circuit connected with the detection points at the two ends of the relay to be detected and the voltage value of the reference voltage end. Judging whether the to-be-detected relay is closed according to whether the voltage values of the detection points at the two ends of the to-be-detected relay are equal or not; and at least one of the detection points at the two ends of the relay to be detected is in a power-on state.
本申请涉及一种继电器状态检测电路及检测方法、电池管理系统,涉及汽车技术领域,该继电器状态检测电路通过电压采集模块和多个分压电路实时检测继电器的开断,同时降低了成本。继电器状态检测电路包括:动力电池组、多个继电器、电压采集模块、多个分压电路和控制器;多个继电器依次串联于动力电池组的正极和负极之间;继电器的两端分别设置有一个检测点;控制器与电压采集模块电连接,控制器被配置为接收电压采集模块采集到的分压电路的第一电压端的电压值,并根据待测继电器的两端的检测点所连接的分压电路的第一电压端的电压值和参考电压端的电压值,得到待测继电器的两端的检测点的电压值,根据待测继电器的两端的检测点的电压值是否相等,判断待测继电器是否闭合;待测继电器的两端的检测点中至少一个检测点处于上电状态。
Relay state detection circuit and detection method, and battery management system
一种继电器状态检测电路及检测方法、电池管理系统
20.09.2024
Patent
Elektronische Ressource
Chinesisch
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