Patent ID: 7172832

Claim:
A sealed battery comprising: a power generation element including a positive electrode and a negative electrode; a battery case which houses the power generation element and includes a first case wall, a second case wall formed in parallel with the first case wall, and a case side wall joining the first and second case walls, the case side wall including at least a part made of an electrically conductive material and serving as an external negative electrode portion electrically connected to the negative electrode; and an external positive terminal which is fixed to the first case wall and electrically connected to the positive electrode, and includes a part exposed to an outside of the case; wherein the external positive terminal includes an extended joint portion extending in a direction perpendicular to the first case wall and is structured to overlap from outside with an external negative electrode portion of a second sealed battery when the first case wall of the sealed battery faces a second case wall of the second sealed battery and the external positive terminal is brought into contact with the second case wall of the second sealed battery.