BATTERY PACK

A battery pack includes an insulating support, a liquid cooling tube, and at least two batteries. The insulating support includes a heat insulating portion. The heat insulating portion is located between adjacent two of the batteries. At least a part of an outer periphery of each battery is accommodated in the heat insulating portion. At least a part of the outer periphery of each battery exposed to an outside of the heat insulating portion is in contact with the liquid cooling tube.