Abstract: A control circuit of a BMS, a battery management system, and an electric vehicle are provided. The control circuit of the BMS may include: a charge-discharge switching module, a freewheel module, and a control module, where the charge-discharge switching module is connected between a battery and a load; the freewheel module is connected in parallel with the load; the control module is connected to the charge-discharge switching module and the freewheel module, respectively, and configured to generate a first control signal and a second control signal; the charge-discharge switching module is configured to be turned off in response to the first control signal; and the freewheel module is activated in response to the second control signal when the charge-discharge switching module is turned off.

Abstract: A cell control board includes a switch device, a detection device, a communication device, and a control device connected with each of the switch device, the detection device and the communication device. The switch device has a first terminal and a second terminal respectively as a first connection terminal and a second connection terminal of the cell control board. Each of the switch device and the detection device can be connected with a cell of a battery pack, and the detection device can detect cell information of the cell. The control device is configured to: transmit the cell information to a battery pack controller through the communication device; receive control instructions therefrom; and control the switch device to adjust, based on the control instructions, connection of the cell with the remaining cells of the battery pack through the first connection terminal and the second connection terminal.