Abstract: Disclosed herein are a system for analyzing battery cell performance and method of analyzing battery cell performance using the same. The system for analyzing battery cell performance includes a process equipment data management unit configured to transmit equipment data, a data analysis and model management unit configured to create and manage, based on the equipment data, a battery model including a base reference model and an extended reference model, and a cell abnormality evaluation unit configured to determine whether there is an abnormal cell using the battery model.

Abstract: A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly; a case for receiving the electrode assembly; a cap plate combined to an opening of the case to close and seal an inside of the case and including a plurality of vent units; an elevation member penetrated and installed in the cap plate and moving by an internal pressure of the case; and a plurality of vent plates for closing and sealing the respective vent units, wherein the vent plate is connected to the elevation member through a connection member and links to the elevation member.

Abstract: A rechargeable battery according to an embodiment of the present invention includes: an electrode assembly; a case for receiving the electrode assembly; a cap plate combined to an opening of the case to close and seal an inside of the case and including a plurality of vent units; an elevation member penetrated and installed in the cap plate and moving by an internal pressure of the case; and a plurality of vent plates for closing and sealing the respective vent units, wherein the vent plate is connected to the elevation member through a connection member and links to the elevation member.