| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithium ion secondary battery pack which has relatively small weight and volume, which has high vibration resistance, and which can be cooled by air. <P>SOLUTION: A foam filling material 24 to fix a battery pack 3 is used between corner parts and a lower case 2 of the battery pack 3, and a passage of air is secured in a lithium ion secondary battery pack. <P>COPYRIGHT: (C)2013,JPO&INPIT |
