| 摘要 |
PROBLEM TO BE SOLVED: To provide a sodium-sulfur battery system with high insulation performance. SOLUTION: A battery system has such structure that a bolt is inserted into a through hole installed on the lower surface of a case 10 and a through hole installed in a fixing rack 2 and fixed with a nut, and an insulating member 3 is interposed between the battery system and the fixing rack 2, between the inside of the lower surface of the case 10 and the bolt, between the fixing rack 2 and the nut, and installed on the outer circumferential surface of the screw part of the bolt.
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