| 摘要 |
<p>The present invention provides a cap plate for a secondary battery having a bent structure and a method of manufacturing the same, in which when there is a danger of explosion due to occurrence of abnormal internal pressure in the secondary battery, the bent structure previously collapses to reduce the abnormal internal pressure, thereby preventing explosion of the secondary battery. The present invention applies, in forming a bent unit (20) forming the bent structure, a backward extrusion process of a press processing method, so that a material, which is moved when a bent recess (21) is formed on a body (12) of a cap plate (10), can be moved toward the upper surface (12a) of the body (12) to form a bent flange (24). Therefore, the present invention can form the bent structure integrally with the body (12), while effectively solving the problem of the prior art occurring because the material, which is moved when the bent structure is formed, is moved to the body (12).</p> |
