BATTERY SELF-HEATING CONTROL METHOD AND SYSTEM, AND ELECTRIC VEHICLE

A battery self-heating control method includes: in a first period of each of control periods, configuring a conduction state of an upper bridge arm assembly and a conduction state of a lower bridge arm assembly to be a self-heating state, and in the self-heating state, alternately charging and discharging a first battery pack and/or a second battery pack to heat the battery pack by a current on a second connecting wire between a motor and the battery pack.