Patent ID: 9331313
Filing Date: 2016-05-03
CPC Classification: H01M,Y02E

Claim Text:
1. A battery pack comprising: (a) a battery cell array comprising two or more battery cells, each of which has an electrode assembly of a structure including cathode, separator and anode disposed in a battery case together with an electrolyte in a sealed state, arranged in a lateral direction; (b) a protection circuit module (PCM) connected to an upper end of the battery cell array to control an operation of the battery pack; (c) a pack case in which the battery cell array and the protection circuit module are disposed; and (d) a spacer mounted between the pack case and the battery cell array to provide a space accommodating the increase in thickness of the battery cell array during charge and discharge of the battery pack, wherein the spacer is configured to have a lattice structure in which the spacer is simultaneously mounted to the battery cells in a state in which the tops or bottoms of the battery cells are exposed, wherein the spacer has a width equivalent to 5 to 20% of a width of each of the battery cells, wherein a width of a portion of the spacer at edges between the battery cells is twice a width of a portion of the spacer at side edges of the battery cell array, wherein the pack case comprises a lower case at which the battery cell array and the protection circuit module are disposed and an upper case to cover the lower case so that the battery cell array and the protection circuit module are fixed in place, wherein the lower case is partitioned into a battery cell mounting part, at which the battery cells are disposed, and a protection circuit module mounting part, at which the protection circuit module is disposed, and wherein a partition wall is formed at an interface between the battery cell mounting part and the protection circuit module mounting part, and recesses, through which electrode terminals of the battery cells are exposed toward the protection circuit module, are formed in a top edge of the partition wall at portions corresponding to electrical connection regions between the electrode terminals of the battery cells and the protection circuit module.