▎ 摘　　要

NOVELTY - The utility model claims a heating device for improving endurance mileage of battery in electric automobile in winter, comprising a base, an inner box body; an outer cover plate and a cover plate; the inner box body is located on the base upper end the top of the base is installed with a lower sealing plate through the mounting groove; the outer side of the inner box body is provided with an outer cover plate; the inner box body is upper end with an upper sealing plate; between the inner box body and the outer cover plate is provided with a hollow cavity; the bottom of the upper sealing plate and the top of the lower sealing plate respectively connected to the inner side of the top end of the hollow cavity and the inner side of the bottom end by glue; the inner bottom of the inner box body is provided with a bottom plate; the inner side of the bottom end of the bottom plate is provided with a clamping groove and the clamping groove is clamped with a foam pad; the top part of the foam pad is provided with a graphene electro-thermal film. The new heating device has good bonding effect with the battery, and the occupied space is small; the heating device has good heat preservation effect; the heating device is convenient for routing the electric connection wire, and it is suitable for wide popularization and use.