Electrode group for nonaqueous battery and method for...

Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode

Reexamination Certificate

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Details

C429S094000, C429S129000, C429S246000, C429S247000, C429S251000, C029S623500

Reexamination Certificate

active

07951487

ABSTRACT:
A positive electrode2includes a positive electrode current collector lead70connected to a core exposed part78formed at a longitudinal center of a current collector core72. A negative electrode3includes a double-coated part14including an active material layer13and a porous protective film28formed on each surface of a current collector core12, a core exposed part18, and a single-coated part17which is located between the double-coated part14and the core exposed part18, and includes the active material layer13and the porous protective film28formed only on one of the surfaces of the current collector core12. A plurality of grooves10are formed in each surface of the double-coated part14, while the grooves10are not formed in the single-coated part17. A negative electrode current collector lead20is connected to the core exposed part18. The negative electrode3is wound in such a manner that the core exposed part18constitutes a last wound end.

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