Patent ID: 9088038
Filing Date: 2015-07-21
Classification: H01M,Y02E

Abstract:
1. A battery module comprising multiple battery pack units, each of the battery pack units comprising a plurality of battery cells connected to each other, the battery module further comprising: a first connecting tab that connects the multiple battery pack units, the first connecting tab comprising a first portion and a second portion, the first and second portions surrounding an opening at a central region of the first connecting tab, the first portion being bonded to the plurality of battery cells of a first battery pack unit from among the battery pack units, and the second portion being bonded to the plurality of battery cells of a second battery pack unit that is adjacent the first battery pack unit from among the battery pack units; and a second connecting tab connecting at least two adjacent battery cells of the plurality of battery cells of a respective one of the first or second battery pack units to each other, the second connecting tab having a different structure from the first connecting tab, and comprising at least two tabs coupled to respective ones of the adjacent battery cells of the plurality of battery cells and a connecting member at a central region that connects the at least two tabs to each other; wherein the first connecting tab has a bending groove configured to overlap the first battery pack unit with the second battery pack unit as the bending groove is folded along a folding axis such that the entire first connecting tab including the first portion and the second portion is enclosed within the folded battery module and the first connecting tab is between the first and second battery pack units of the folded battery module, and wherein the first connecting tab, the opening at the central region, and the bending groove are aligned with each other along a direction parallel to the folding.