Patent ID: 8025999
Filing Date: 2011-09-27
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. A pouch type lithium secondary battery having an electrode assembly that includes a positive electrode plate and a negative electrode plate facing against each other, and a separator interposed between the positive electrode plate and the negative electrode plate, the pouch type lithium secondary battery comprising: a case that includes an upper plate and a lower plate; wherein the lower plate includes a first chamber containing the electrode assembly; wherein the case is formed by folding a multilayer film pouch so as to form a common portion formed by contacting the first chamber and a second chamber with each other, the second chamber is formed at one upper side of the multilayer film pouch and the first chamber is formed in a diagonal direction to the second chamber at one lower side of the multilayer film pouch, the multilayer-film pouch being folded to form the common portion where the first chamber and the second chamber overlap each other; wherein the upper plate seals the first chamber formed at the lower plate, and includes a sealing trace formed at the area where the first chamber is sealed; and wherein the sealing trace is formed in a shape where unshaped creases are distributed.