BATTERY PACK

摘要

A battery pack includes cylindrical batteries, a thermal diffusing plate, and a casing. The thermal diffusing plate holds the cylindrical batteries. The casing houses the cylindrical batteries and the thermal diffusing plate. The casing includes a first inner surface, inner surfaces other than the first inner surface, a first outer surface, and outer surfaces other than the first outer surface. The first inner surface is located between the first outer surface and the thermal diffusing plate. The heat transfer coefficient between the first outer surface and an outside air of the casing is lower than the heat transfer coefficient between each of the outer surfaces other than the first outer surface and the outside air of the casing.

主权项

1. A battery pack comprising:
a plurality of cylindrical batteries; a thermal diffusing plate holding the plurality of cylindrical batteries, the thermal diffusing plate being configured to transfer heat between the thermal diffusing plate and a cylindrical surface of each of the plurality of cylindrical batteries, the cylindrical surface being an outer peripheral surface of each of the plurality of cylindrical batteries; and a casing housing the plurality of cylindrical batteries and the thermal diffusing plate, wherein the casing includes a first inner surface, inner surfaces other than the first inner surface, a first outer surface, and outer surfaces other than the first outer surface, the first inner surface is located between the first outer surface and the thermal diffusing plate, the thermal diffusing plate is fixed to the first inner surface, and a heat transfer coefficient between the first outer surface and an outside air of the casing is lower than a heat transfer coefficient between each of the outer surfaces other than the first outer surface and the outside air of the casing.