Heat exchange unit, battery and electric device

The utility model provides a heat exchange unit, a battery and an electric device. The heat exchange unit comprises a plurality of heat exchange plates and a current collecting component, the plurality of heat exchange plates are arranged at intervals in the first direction, an accommodating space for accommodating a battery monomer is formed between every two adjacent heat exchange plates, and a heat exchange flow channel for a heat exchange medium to flow is formed in each heat exchange plate. The flow collecting component is connected to the multiple heat exchange plates and enables the heat exchange flow channels of the heat exchange plates to be communicated.