Liquid cooling assembly and battery device

The utility model discloses a liquid cooling assembly and a battery device, the liquid cooling assembly comprises a first liquid cooling plate and a second liquid cooling plate, the first liquid cooling plate comprises a first wall surface provided with a first liquid inlet and a first liquid outlet, and the second liquid cooling plate comprises a second wall surface which is opposite to the first wall surface at an interval and is provided with a second liquid inlet and a second liquid outlet. According to the utility model, the design of a cooling pipeline is facilitated, and the volume utilization rate of the battery device is improved. The second liquid inlet is communicated with the first liquid outlet, so that the design of a cooling pipeline can be simplified, and the complexity of the cooling pipeline is reduced. The first liquid inlet and the second liquid outlet are oppositely arranged along the direction perpendicular to the first wall surface, so that the effective electric quantity of the battery