BATTERY PACK

A battery pack includes an insulating support (100), a liquid cooling tube (200), and at least two batteries. The insulating support (100) includes a heat insulating portion (110). The heat insulating portion (110) 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 (110). At least a part of the outer periphery of each battery exposed to an outside of the heat insulating portion (110) is in contact with the liquid cooling tube (200).