Electric automobile battery heating device

The utility model discloses a battery heating device of an electric automobile. The battery heating device of the electric automobile comprises a temperature sensor, an AD converter, a controller, a high-frequency switching device, an electromagnetic coil and an induction heating sheet, and heat is generated by adopting an electromagnetic induction heating principle, so that the mounting positionof the electromagnetic coil can be flexibly set according to the space in the automobile as long as the electromagnetic coil is arranged below the induction heating sheet; the insulation heat transferlayer, the induction heating layer and the heat preservation and insulation layer of the induction heating piece are all made of extremely thin materials, the total thickness is only 4-7.5 mm, the induction heating piece can be completely arranged in gaps between single batteries in a battery pack, no extra space is occupied, and the induction heating piece has the advantages of being small in size, light in weight and lo