Secondary battery taking electrolyte as refrigerant

The secondary battery comprises a plurality of groups of battery units, a plurality of groups of bipolar plates and a shell, and the battery units and the bipolar plates are sequentially stacked in series at intervals; the secondary battery is provided with a flow channel for electrolyte circulation, and the flow channel is an open slot and is arranged on an interface between the battery unit and the adjacent bipolar plate; the liquid electrolyte is an ionic conduction medium in the battery unit and is also a heat exchange medium of the battery unit. The secondary battery taking the electrolyte as the refrigerant has the advantages of more direct heat exchange, high heat exchange speed and uniform heat exchange, simplifies the battery structure, reduces the cost, can greatly reduce the risk of combustion safety accidents caused by thermal runaway, and can greatly improve the charging speed and eliminate mileage anxiety when being used in the fields of new energy automobiles and the like. 本申请公开了一种以电解质作为制冷剂的二次电