Thermal management device, battery and electric equipment

The embodiment of the utility model provides a thermal management device, a battery and electric equipment. The thermal management device is applied to a battery. The heat management device comprises a first heat exchange piece and a second heat exchange piece. The first heat exchange piece is provided with a first face and a second face which are oppositely arranged in the thickness direction of the first heat exchange piece, and the first face is provided with a groove sunken towards the second face. The first face is connected with the second heat exchange piece in an attached mode, and the second heat exchange piece seals the groove to define a flow channel. Wherein the first heat exchange piece is provided with a hollow part. According to the technical scheme, the energy density of the battery is improved.