| US 7,482,090 B2 | ||
| Nonaqueous electrolyte secondary battery | ||
| Yoshinao Tatebayashi, Yokohama (Japan); Hiroki Inagaki, Kawasaki (Japan); and Norio Takami, Yokohama (Japan) | ||
| Assigned to Kabushiki Kaisha Toshiba, Tokyo (Japan) | ||
| Filed on Mar. 24, 2005, as Appl. No. 11/87,596. | ||
| Claims priority of application No. 2004-094984 (JP), filed on Mar. 29, 2004. | ||
| Prior Publication US 2005/0221173 A1, Oct. 06, 2005 | ||
| Int. Cl. H01M 10/50 (2006.01) | ||
| U.S. Cl. 429—60 [429/62] | 8 Claims |
| 1. A nonaqueous electrolyte secondary battery, comprising:
a case;
a negative electrode provided in the case and including a negative electrode current collector formed of aluminum or an aluminum
alloy, and a negative electrode active material layer that is formed on the negative electrode current collector and has a
Li absorption-release potential nobler by at least 0.4V than a lithium electrode potential, and a projecting portion formed
on one side of the negative electrode current collector, formed of aluminum or an aluminum alloy, and including first and
second sections, said first section disposed between the second section and the negative electrode active material layer;
a negative electrode terminal connected to the second section of the projecting portion of the negative electrode current
collector, the negative electrode active material layer is not formed in the projecting portion;
a positive electrode including a positive electrode active material layer that absorbs and releases Li element or Li ions
and is positioned to face the negative electrode active material layer and the first section of the projecting portion of
the negative electrode current collector;
a separator provided between the positive electrode active material layer and the negative electrode active material layer,
and between the positive electrode active material layer and the first section of the projecting portion of the negative electrode
current collector;
a stress imparting member which imparts a tensile stress or a shearing stress to the first section of the projecting portion
of the negative electrode current collector; and
a nonaqueous electrolyte provided in the case.
|