Heating device of power battery, battery system and electric vehicle

Abstract

The invention provides a heating device of a power battery, a battery system and an electric vehicle, the heating device comprises a plurality of heating power supplies, heating units are respectively arranged in a plurality of heating areas on the surface of the power battery, and a control circuit controls the corresponding heating units to switch working states according to temperature difference data of each heating area. The temperature difference between all the heating areas is kept within a certain reasonable range in the process of heating the power battery by the heating device, so that the abnormality caused by non-uniform heating of different heating areas due to objective environmental factors is avoided, and the heating efficiency of the power battery by the heating device is improved.

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