Chemistry: electrical current producing apparatus – product – and – Plural concentric or single coiled electrode
Reexamination Certificate
2011-08-09
2011-08-09
Crepeau, Jonathan (Department: 1725)
Chemistry: electrical current producing apparatus, product, and
Plural concentric or single coiled electrode
C429S211000, C429S233000
Reexamination Certificate
active
07993770
ABSTRACT:
In a cylindrical lithium ion secondary battery, the width of an electrode tab positioned at a center of an electrode assembly is extended so that it serves as a center pin and functions to release heat. Thus, it is not necessary to separately insert a center pin, thereby reducing the manufacturing cost and steps. The cylindrical lithium ion secondary battery comprises an electrode assembly, a case for receiving the electrode assembly, and a cap assembly for sealing the top opening of the case. The electrode assembly comprises a positive electrode plate and negative electrode plate. The positive electrode plate has a positive electrode tab, a positive active material region, a positive uncoated region, and a positive current collector exposed through the positive uncoated region. The negative electrode plate has a negative electrode tab, a negative active material region, a negative uncoated region, a negative current collector exposed through the negative uncoated region, and a separator interposed between the positive and negative electrode plates. At least one of the positive and negative electrode tabs has an extended width at the center of the electrode assembly.
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Machine translation of KR 10-646500B, Nov. 2006.
Hyung Yoo-eup
Kim Jungseok
Kim Yong-tae
Nam Sangbong
Bushnell , Esq. Robert E.
Crepeau Jonathan
Samsung SDI & Co., Ltd.
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