| 摘要 |
A battery pack 1 of the present invention includes: a secondary battery 2; a molded body 11 configured to store therein the secondary battery; and a foamable layer 12 provided between the secondary battery and an inner surface of the molded body and configured to foam at a predetermined temperature or higher to form a foam heat insulating layer. With this, a heat insulating layer contained in the battery pack is thin in a normal state where the battery is not generating heat, and the heat insulating layer exerts a high heat insulating effect at the time of malfunction to suppress the temperature increase of a surface of the battery pack. |
