| CPC H01M 50/507 (2021.01) [H01M 10/0468 (2013.01); H01M 50/211 (2021.01); H01M 50/516 (2021.01)] | 13 Claims |
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1. A battery module, comprising:
a battery cell stack in which a plurality of battery cells are stacked;
a busbar frame connected to the battery cell stack and having a plurality of busbars;
cell terraces each protruding from battery cells adjacent to each other among the plurality of battery cells included in the battery cell stack; and
electrode leads each protruding from the cell terraces and having the same polarity,
wherein the electrode leads overlap in different lengths, respectively, with the same busbar among the plurality of busbars, and have at least two welding points at overlapping portions of the same busbar and the electrode leads,
wherein the electrode leads include N number of the electrode leads, and the N electrode leads overlap with the same busbar,
wherein the at least two welding points include a first welding point and a second welding point, and the first welding point is welded between the N electrode leads and an electrode lead closest to the same busbar, and the second welding point is welded between N−1 electrode leads among the N electrode leads and the same busbar.
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