Double-layer water cooling plate for heat dissipation of power battery pack

The utility model relates to the field of double-layer water-cooling plates for heat dissipation of a power battery pack, and discloses a double-layer water-cooling plate for heat dissipation of a power battery pack, which comprises water-cooling plates, water inlets are fixedly arranged on one sides of the two water-cooling plates, water outlets are fixedly arranged on one sides, far away from the water inlets, of the two water-cooling plates, and the water inlets are communicated with the water outlets. And four first sliding columns are fixedly arranged at the bottom end of one water cooling plate, and the side walls of the four first sliding columns are slidably sleeved with second sliding columns. According to the water cooling device, the water tank shell with a relatively long area is formed in the water cooling plate, so that the device has a relatively good water cooling heat dissipation effect on the battery pack, and the device realizes double-layer heat dissipation at the top end and the bottom en