Patent ID: 7264760

Claim:
A method for producing a battery pack, the method comprising: retaining a battery and a board in a mold, the battery being retained in a battery-retaining portion of the mold and the board having at least one lug portion received in a board-retaining portion of the mold to thereby retain the board in the board-retaining portion of the mold, wherein the board-retaining portion and the battery-retaining portion are positioned so that a space is formed between the battery and the board, and the board includes external input-output terminals; and injecting mold material into the space in the mold between the battery and the board so as to form an integral structure in which the board is held to the battery by the mold material, and the external input-output terminals are exposed to the outside, wherein the board-retaining portion of the molded comprises: a lower step portion formed in a lower part of the mold and at least one lower projection that projects upwardly from a surface of the lower part of the mold such that a lower gap is defined between the lower step portion and the lower projection; and an upper step portion formed in an upper part of the mold and at least one upper projection that projects downwardly from a surface of the upper part of the mold such that an upper gap is defined between the upper step portion and the upper projection, wherein the sides of the board are received in the lower and upper gaps, respectively, so as to retain the board in the mold.