A power battery base includes a tray and a liquid cooling tube disposed on the tray, wherein the tray includes a bottom plate and side plates disposed around the periphery of the bottom plate, the bottom plate and the side plates jointly form a receiving cavity for receiving a power battery pack, the bottom plate is provided with at least one beam, the beam divides the bottom plate into at least two sub-bottom plates, the liquid cooling tube is laid on at least one of the sub-bottom plates, and the liquid cooling tube is disposed across the beam that it passes through.