Chemistry: electrical current producing apparatus – product – and – Plural concentric or single coiled electrode
Reexamination Certificate
2011-04-19
2011-04-19
Mayes, Melvin C (Department: 1732)
Chemistry: electrical current producing apparatus, product, and
Plural concentric or single coiled electrode
C429S122000, C429S129000, C429S131000, C429S133000, C429S134000, C429S135000, C429S142000, C429S144000
Reexamination Certificate
active
07927729
ABSTRACT:
A secondary battery having an electrode assembly in which strip-shaped positive and negative electrode plates are spirally wound with a strip-shaped separator interposed therebetween, the positive and negative electrode plates comprising a current collector and a material mixture layer carried thereon. The positive electrode plate has, in a vicinity of a first end at an initial winding side, an exposed portion of the positive electrode current collector having no positive electrode material mixture formed thereon and a positive electrode lead connected to the exposed portion. A first winding turn outwardly adjacent to a connecting portion of the positive electrode lead with the separator interposed therebetween and a second winding turn outwardly adjacent to the first winding turn with the separator interposed therebetween comprise a portion of the negative electrode plate carrying the negative electrode material mixture layer.
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Fukumasa Takeshi
Furuta Hiroaki
Matsuno Hiroshi
Muraoka Hiroki
Li Jun
Mayes Melvin C
McDermott Will & Emery LLP
Panasonic Corporation
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