Double-runner liquid cooling plate and battery pack

The utility model belongs to the technical field of cooling systems, and particularly relates to a double-runner liquid cooling plate and a battery pack thereof, and the liquid cooling plate comprises an upper runner plate, a lower runner plate and a substrate, the substrate is configured between the upper runner plate and the lower runner plate; the upper runner plate is attached to the base plate to form a first runner for cooling liquid to flow, and the lower runner plate is attached to the base plate to form a second runner for cooling liquid to flow; and the flowing direction of the cooling liquid in the first flow channel is opposite to the flowing direction of the cooling liquid in the second flow channel. By arranging the double-layer flow channel structure of the first flow channel and the second flow channel, the heat transfer between the cooling liquid and the battery can be enhanced, and the heat dissipation effect is improved; furthermore, the flowing directions of the first flow channel and the