| 摘要 |
A battery pack couples first and second batteries mutually linearly via a connector of a metallic plate. The connector formed of a tube with a bottom is composed of a bottom portion and a side wall. Regarding the bottom portion, an outer periphery is welded to a bottom wall of a second battery casing, while an inner periphery inwardly of the outer periphery is welded to a sealing plate of the first battery. The side wall of the connector, protruded toward the first battery, has an inner diameter larger than an outer diameter at an end portion of the first battery. Regarding the battery pack, the end portion of the first battery is inserted inside the side wall of the connector in a non-contact state, and the bottom portion is welded to the first and second batteries, thus the first and second batteries being mutually coupled by the connector.
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