| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery pack using a thermal diffusion plate that suppresses increase in physical constitution and makes temperature of each battery uniform.SOLUTION: The battery pack includes cylindrical batteries 11 and a thermal diffusion plate 12 for holding each of the cylindrical batteries 11 so that heat can be transferred among each of cylindrical surfaces of the cylindrical batteries 11. The thermal diffusion plate 12 is fixed inside so as to house the cylindrical batteries 11 and the thermal diffusion plate 12. The thermal diffusion plate 12 is fixed along an inner surface of a bottom plate 41 of a casing 30. A heat transfer coefficient between an outer surface of the bottom plate 41 of the casing 30 and ambient air is lower than a heat transfer coefficient between other outer surfaces of the casing 30 and the ambient air.SELECTED DRAWING: Figure 2 |
