| 摘要 |
PROBLEM TO BE SOLVED: To electrically connect a number of metal lines stably and surely and that in a low-resistance state with metal terminals of unit batteries. SOLUTION: The battery pack connects metal lines 3 to metal terminals 2 of a plurality of adjacent unit batteries 1, and connects the unit batteries 1 in series or in parallel by the metal lines 3. Furthermore, the battery pack couples the metal lines 3 with the metal terminals of the unit batteries 1 by ultrasonic welding. As a result, the metal lines and the metal terminals can be connected in a low-resistance state, and joint parts are held in a low-resistance state for a long period of time. The ultrasonic welding can stably join the metal lines and the metal terminals even if they are different kinds of metal. COPYRIGHT: (C)2008,JPO&INPIT
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