The invention relates to the technical field of power supply control, and discloses a power supply system and method, a battery management unit and an electric vehicle, and the power supply system comprises the battery management unit, a battery and a controller; the battery management unit comprises a first pin and a second pin; the controller comprises a third pin, a fourth pin and a relay; the normally closed contact of the relay is connected with the fourth pin, and the other end is connected with the battery cathode; before the controller is connected with the battery management unit, the first pin and the second pin are configured to be pins with a GPIO function and are configured to be high level and low level respectively; the relay remains closed. After the controller is connected with the battery management unit, the battery management system controls the battery to be powered on, after the controller is powered on, the normally-closed contact of the relay is disconnected, the battery management unit can judge that the controller is on line by detecting the state change of the level of the first pin from high to low and then to high, and after the controller is on line, the normally-closed contact of the relay is disconnected. And judging that the controller is offline by detecting the change of the level of the second pin from high to low.
本申请涉及供电控制技术领域,公开了一种供电系统、方法、电池管理单元及电动车,该供电系统包括:电池管理单元、电池和控制器;电池管理单元包括第一、二引脚;控制器包括第三、四引脚和继电器;继电器常闭触点与第四引脚连接,另一端与电池负极连接;在控制器与电池管理单元连接前,第一、二引脚被配置为GPIO功能的引脚,并被分别配置为高电平和低电平;继电器保持关闭。在控制器与电池管理单元连接后,电池管理系统控制电池上电,控制器得电后,继电器常闭触点断开,电池管理可通过检测第一引脚的电平由高到低再到高的状态变化,判断控制器上线,控制器上线后,通过检测第二引脚的电平由高到低状态变化,判断控制器下线。
Power supply system and method, battery management unit and electric vehicle
一种供电系统、方法、电池管理单元及电动车
2025-03-04
Patent
Electronic Resource
Chinese
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