The invention provides a battery thermal management device, which comprises a liquid storage tank, a pump body, a heating refrigerator, a plurality of battery boxes, a pipeline and a battery management module. Each battery box includes a battery module and a heat exchange board abutting on the surface of the battery module. The heat conducting medium in the liquid storage tank is pressurized underthe action of the pump body and flows through the heating refrigerator, the heat exchange plate and finally returns to the liquid storage tank through the pipeline in turn. A battery management module includes a plurality of temperature sensors for measuring temperature information of a plurality of battery modules, Heating refrigerator, temperature sensor electrically connected control module, control module receives and according to the information collected by the temperature sensor to control whether the pump body is started and whether the heating refrigerator heats or refrigerates the heat conduction medium. The battery thermal management device provided by the invention is relatively simple in structure, safe and reliable in use and good in uniform temperature effect.