Sanyo Electric Co., Ltd.

Takayuki Nobuhira

Kengo Ishibashi

Koji Fujinaga

Takatoshi Kageyama

A battery module includes a plurality of battery cells each including an electrode terminal, and a bus bar that connects respective electrode terminals of adjacent battery cells in a state where the plurality of battery cells are stacked, wherein the bus bar includes a first bus bar having a first thickness, and a second bus bar having a second thickness larger than the first thickness, the first bus bar is connected to the respective electrode terminals of the adjacent battery cells, and the second bus bar is in non-contact with electrode terminals of the battery cells.

Battery module, vehicle provided with same, and bus bar

In order to provide a battery module and the like capable of maintaining a fastened state of a plurality of battery cells with high reliability, battery module includes a plurality of battery cells each having electrode terminals, a pair of end plates that cover both side end surfaces of battery stack including the plurality of stacked battery cells, and a plurality of fastening members that fastens end plates to each other. End plate forms overlapping portion that covers at least a portion of each fastening member covering each side surface of battery cells located on the both side end surfaces of battery stack, and overlapping portion and the fastening members are welded and fixed. According to the above configuration, by welding in a state in which a side surface of fastening member is further covered with overlapping portion, there is an advantage that firm fixation can be achieved while preventing disengagement of fastening member.

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Hyogo, Japan

Takayuki Nobuhira