Patent ID: 8399114

Claim:
A battery module comprising: a first unit cell that has a positive electrode terminal disposed so as to face a first direction; a second unit cell that is connected in series to the first unit cell, has a negative electrode terminal disposed so as to face the first direction, and is disposed adjacent to the first unit cell; a first exhaust chamber that is disposed so as to face the positive electrode terminal of the first unit cell and discharges a gas emitted from the positive electrode terminal of the first unit cell; a second exhaust chamber that is disposed so as to face a positive electrode terminal of the second unit cell and discharges a gas generated from the positive electrode terminal of the second unit cell; and a lead plate that electrically connects the positive electrode terminal of the first unit cell and the negative electrode terminal of the second unit cell to each other, wherein an end surface of the second unit cell in the first direction and an outer surface of the first exhaust chamber in the first direction are flush with each other, wherein an end surface of the first unit cell in a second direction opposite to the first direction and an outer surface of the second exhaust chamber in the second direction are flush with each other, wherein one end of the lead plate is disposed between the positive electrode terminal of the first unit cell and the exhaust chamber so as to face the positive electrode terminal, wherein the other end of the lead plate is disposed so as to face the negative electrode terminal of the second unit cell, and wherein the negative electrode-side end surface of the second unit cell is formed by an outer surface of the other end of the lead plate in the first direction.