| CPC H01M 50/553 (2021.01) [H01M 50/178 (2021.01); H01M 50/211 (2021.01); H01M 50/505 (2021.01); H01M 50/516 (2021.01)] | 12 Claims |
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1. A battery module comprising:
a plurality of battery cells and a bus bar assembly connecting the plurality of battery cells,
wherein each of the plurality of battery cells includes:
an electrode assembly capable of storing and supplying electrical energy;
a battery exterior material accommodating the electrode assembly therein; and
an electrode lead including a first tab portion that is electrically connected to the electrode assembly and that protrudes to an outside of the battery exterior material, and a second tab portion that extends along a first direction in which the first tab portion protrudes from a free end of the first tab portion and that has a different shape from the first tab portion,
wherein the bus bar assembly is positioned between the battery exterior material and the second tab portion to be electrically connected to the electrode lead,
wherein the second tab portion is provided with a different length from the length of the first tab portion, based on a second direction perpendicular to a surface provided with the largest area among surfaces of the battery exterior material disposed along the first direction, and
wherein the bus bar assembly includes one or more insertion portions with one side at least a part of which is open along a third direction perpendicular to the first direction and the second direction.
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