| 摘要 |
A battery pack has a unit cell including a battery case having an opening and made of metal and including a sealing plate closing and sealing the opening of the battery case and made of metal, a circuit board having a safety circuit, and a holding member holding the circuit board, and employs a structure in which at least part of the holding member is fixed to the unit cell by laser welding. By the employment of such a structure, the battery pack can be provided in which the holding member holding the circuit board can reliably be fixed to the unit cell and of which total cost can be reduced by saving of labor of assembly that is achieved by simplification of a structure for fixing the holding member to the unit cell.
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