Patent ID: 8080333

Claim:
A battery pack comprising: a unit cell in which a first electrode terminal is formed on a terminal formation surface; an exterior cover fixed so as to cover the terminal formation surface of the unit cell; a circuit board which has a protection circuit for controlling a charging current and a second electrode terminal electrically connected to the protection circuit, and which is placed inside the exterior cover so that the second electrode terminal is opposed to the first electrode terminal of the terminal formation surface of the unit cell; and a connector placed between the first electrode terminal and the second electrode terminal so as to electrically connect the first electrode terminal and the second electrode terminal to each other, wherein the connector comprises: an elastic body formed from an elastic material; and a conductor which is fixed to the elastic body so as to be exposed at, at least, opposite positions in surfaces of the elastic body and which makes the exposed portions in the opposite positions electrically connected to each other, wherein in a state that the elastic body is elastically compressed so that the exposed portions of the conductor in the opposite positions are in press contact with the first electrode terminal and the second electrode terminal, respectively, the first electrode terminal and the second electrode terminal are maintained electrically connected to each other by the connector.