To prevent: short circuit between positive and negative electrode terminals due to dew condensation water; and thermal deformation of an insulating seal member due to heat input when a bus bar is welded to the positive and negative electrode terminals.
A unit cell includes: positive and negative electrode terminals 141 and 151 attached to a through hole 102h of a battery lid 102; and a gasket 130 that is disposed between the positive and negative electrode terminals 141 and 151 and the through hole 102h, and provides insulation between the positive and negative electrode terminals 141 and 151 and the battery lid 102. The positive and negative electrode terminals 141 and 151 are respectively provided with external terminal parts 142 and 152 to which a bus bar 110 for establishing an electrical connection between unit cells is welded. The gasket 130 includes a covering part 130c that covers tightly outer peripheral surfaces of the external terminal parts 142 and 152 of the positive and negative electrode terminals 141 and 151 protruding outward from the through hole 102h of the battery lid 102. The front end of the covering part 130c is located further closer to the battery lid than bus bar contact surfaces 142a and 152a of the external terminal parts 142 and 152.
KAJIWARA KOICHI
SHIBANUMA HIDEYUKI
| JP2008311014A | 2008-12-25 | |||
| JP2011171078A | 2011-09-01 | |||
| JP2009076394A | 2009-04-09 | |||
| JP2012199221A | 2012-10-18 |
| WO2012011470A1 | 2012-01-26 |
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