| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a secondary battery which is excellent in vibration resistance and impact resistance regardless of a shape of a current-collecting plate. <P>SOLUTION: The secondary battery comprises an electrode group in which a cathode foil and an anode foil are wound around a winding core via a separator. The electrode group is stored in a battery can and is sealed with a battery lid. The winding core is provided with a plurality of protrusions being in contact with the battery lid and/or an inner surface of the battery can. <P>COPYRIGHT: (C)2012,JPO&INPIT |
