Claims
- 1. A non-aqueous electrolyte secondary battery comprising:an electrode group comprising: a positive electrode and a negative electrode having a separator material sandwiched therebetween, said positive electrode comprising a first conductive metal foil portion comprising a coating of an active material or a mixture of an active material and a conductive agent, and a second conductive metal foil portion electrically connected to said positive electrode, wherein an outermost portion of the negative electrode is positioned outwardly of an outermost portion of the positive electrode, said second metal foil portion is positioned outwardly of the negative electrode outermost portion, and said separator material is positioned between the second metal foil portion and the negative electrode outermost portion and covers an outermost side of the second metal foil portion; and a negative polarity cell container in which said electrode group is housed together with a non-aqueous electrolyte.
- 2. The non-aqueous electrolyte secondary battery according to claim 1, wherein:the electrode group comprises said positive electrode and said negative electrode spirally coiled together with said separator material therebetween, wherein said second metal foil portion is electrically connected to an outer circumferential end of the positive electrode, the negative electrode outermost portion comprises a first outer circumference that is entirely covered with the second metal foil portion that comprises a second outer circumference, said separator material positioned between said first outer circumference and second outer circumference and covering said second outer circumference.
- 3. The non-aqueous electrolyte secondary battery according to claim 1, wherein said electrode group has an oval cross-section with said positive electrode, said negative electrode, and said separator material therebetween, configured in a flat plate in a central winding core; in which said second metal foil portion is electrically connected to an outer circumferential end of the positive electrode and wherein the negative polarity cell container has an oval geometry.
- 4. A non-aqueous electrolyte secondary battery of claim 1, wherein the first metal foil portion that comprises the positive electrode has an exposed portion thereof without said coating, said exposed portion defining said second metal foil portion.
- 5. The non-aqueous electrolyte secondary battery of claim 2, wherein the first metal foil portion that comprises the positive electrode collector has an exposed portion thereof without said coating, said exposed portion defining the second metal foil portion.
- 6. The non-aqueous electrolyte secondary battery of claim 3, wherein the first metal foil portion that comprises the positive electrode collector has an exposed portion thereof without said coating, said exposed portion defining the second metal foil portion.
- 7. The non-aqueous electrolyte secondary battery of claim 1, wherein said electrode group is adapted to fail upon application of a crushing force by at least one failure mode selected from the group consisting of:the separator material on the outermost side of said second metal foil portion breaking first so that the second metal foil portion short-circuits with an inner wall of said cell container; the separator material between said second metal foil portion and said negative electrode breaking first so that the second metal foil portion short-circuits with said negative electrode.
Priority Claims (1)
Number |
Date |
Country |
Kind |
8-073529 |
Mar 1996 |
JP |
|
Parent Case Info
This application is a U.S. National phase application of PCT INTERNATIONAL APPLICATION PCT/JP97/01040.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
PCT/JP97/01040 |
|
WO |
00 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO97/36338 |
10/2/1997 |
WO |
A |
US Referenced Citations (7)
Foreign Referenced Citations (8)
Number |
Date |
Country |
0 655 793 |
May 1995 |
EP |
2 225 153 |
May 1990 |
GB |
2-51875 |
Feb 1990 |
JP |
05234620 |
Sep 1993 |
JP |
5-234620 |
Sep 1993 |
JP |
07320770 |
Dec 1995 |
JP |
8-153542 |
Jun 1996 |
JP |
WO9610273 |
Apr 1996 |
WO |
Non-Patent Literature Citations (1)
Entry |
International Search Report for Int'l Appln. No. PCT/JP97/01040 dated Jul. 10, 1997. |