Lithium battery BMS power supply self-locking system

The utility model relates to a lithium battery BMS power supply self-locking system, which comprises a switch module, a BMS power supply module, a control module and a BMS wake-up module, the switch module comprises a conduction control end, a first conduction end and a second conduction end, the BMS power supply module comprises a power supply output end and an enable control end, the control module comprises a power supply input end and a signal output end, and the BMS wake-up module comprises a first conduction end and a second conduction end. The BMS wake-up module is electrically connected with the enable control end and is used for generating the enable signal. When the BMS wake-up module generates an enable signal, the control module is powered on, and the first conduction end and the second conduction end are conducted at the same time, so that the voltage output by the BMS power supply module can serve as input voltage to be continuously received by the enable control end of the BMS power supply modu