Battery management system, battery pack, electric vehicle, and battery management method

A battery management system according to the present invention is used for a battery that is connected in parallel to a rectifier filter capacitor via a high-voltage-side power line and a low-voltage-side power line. The battery management system comprises a discharge control switch connected between a first node and a second node of the low-voltage-side power line, a temperature sensing circuit including a thermistor, wherein a first end of the thermistor is connected to the first node; a pre-charge switch connected to a pre-charge power line between the second end and a second node of the thermistor; and a control unit. The control unit is configured to turn off the discharge control switch and turn on the pre-charge switch, for pre-charging of the rectifier filter capacitor, when a key-on signal is received. 根据本公开内容的电池管理系统用于电池，所述电池通过高压侧电源线和低压侧电源线并联连接到整流滤波电容器。所述电池管理系统包括：连接在低压侧电源线的第一节点和第二节点之间的放电控制开关；包括热敏电阻器的温度感测电路，其中热敏电阻器的第一端子连接至第一节点；连接至位于热敏电阻器的第二端子和第二节点之间的预充电电源线的预充电开关；以及控制单元。所述控制单元被配置为当所述控制单元接收到钥匙启动信号时，断开所述