Battery thermal management device

The utility model discloses a battery thermal management device which comprises a lithium battery, a first temperature sensor is installed on a heating surface of the lithium battery in a matched mode, and a second temperature sensor is fixedly arranged on one side, away from the heating surface, of the lithium battery. Firstly, the temperature of the environment or the battery is sensed through the temperature sensor, when the temperature is lower than the set temperature, the heating assembly is controlled to work, the heating temperature of the heating assembly each time can be automatically set, in the heating process, the current heating temperature of the heating assembly is sensed through the first temperature sensor, and when the set heating temperature is reached, the heating assembly is controlled to work. The heating assembly performs continuous and stable heating according to the current heating temperature until the temperature difference between the temperature of the second temperature sensor a