| 摘要 |
<p>Disclosed is a rechargeable battery for preventing an internal short circuit of a cell by inducing bending of a cap plate in a predetermined direction under a side compression condition. The rechargeable battery includes a case, an electrode assembly in the case and a cap plate closing the case, wherein the case comprises a first region A1 disposed in a centre portion of the case and second regions A2 on either side of the first region, wherein the radius of curvature of the internal curved surfaces connecting the bottom of the case to the front or rear walls of the case is greater in the second regions A2 than in the first region A1 of the case and the cap plate includes a groove formed on an inner surface of the cap plate for inducing bending of the cap plate in response to a compression force applied to sides of the case, the groove disposed in an area of the cap plate that corresponds to the position of an interface between the first and second regions A1, A2.</p> |
