| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery capable of combining the low resistance of lead and the guarantee of ultrasonic bonding strength by using ultrasonic bonding, and to provide an ultrasonic bonding method. <P>SOLUTION: The battery includes a container 12, an electrode group 1 housed in the container and including positive electrodes and negative electrodes, a plurality of collector tabs 2a, 2b extending from the positive electrodes or negative electrodes in the electrode group and being overlapped by a metal foil, leads 5a-5c, 6a-6c being bonded to at least one of the collector tabs by ultrasonic bonding, a lid 11 closing the aperture of the container, and external terminals 9, 10 provided on the lid and connected with the collector tabs via the leads. The lead increases the cross sectional area in the way from the ultrasonic joint to the collector tab to the external terminal, and has a planar surface on the side facing the collector tab of the lead. <P>COPYRIGHT: (C)2013,JPO&INPIT |
