Water-cooling type lithium ion battery

The utility model relates to the field of lithium ion batteries, and discloses a water-cooling type lithium ion battery. The battery consists of a battery module and water cooling plates, wherein the battery module consists of two battery pole pieces and a plurality of battery cells; the electrodes of the battery cells are respectively arranged at both ends of the battery; each battery cell is clamped between every two battery pole pieces; the electrodes are respectively connected with the battery pole pieces; the water cooling plate is arranged on the outer side of each battery pole piece to be connected with the battery pole pieces through heating conducting strips and the water cooling plates in an insulation and heat-conducting mode; heat conducting strips are made of phase-change heat conducting insulating materials. Through the adoption of the water cooling type lithium ion battery provided by the utility model, the water cooling plates are fitted with the electrodes of the battery cells, and mainly, the electrodes of the battery cells are cooled, so as to improve the cooling efficiency. Through the adoption of a water cooling mode, the cooling effect is good. When the temperature rises to the phase change temperature, the heat conducting strips deform, and are better fitted with the electrodes of the battery cells for heat conduction, so as to improve the cooling effect.