Electrode tab for spiral wound battery

Details Electrode tab for spiral wound battery Electrode tab for spiral wound battery

2003-03-13

2010-06-01

Walker, Keith (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S161000, C429S178000, C429S094000

Reexamination Certificate

active

07727671

ABSTRACT:
A closed battery, according to the invention, comprises a substantially flat box-type outer case60having electrical conductivity, provided with an opening on one side in the longitudinal direction thereof and other peripheral sides that are closed, a spiral electrode body21housed in the outer case, comprising a positive electrode, a negative electrode, and a separator interposed therebetween, an electrode current collector tab21alarger in thickness than a core body, welded to a cut and raised piece that is cut and raised from an exposed part of the core body of one of the electrodes of the spiral electrode body, and a sealing plate50for covering and sealing the opening of the outer case, wherein the outer case is sealed by laser-welding with the electrode current collector tab being clamped between the rim of the opening and the sealing plate when sealing the opening of the outer case.Under the construction described above, since the mechanical strength of the electrode current collector tab is enhanced, improvements in the performance and reliability of the closed battery can be obtained.

REFERENCES:
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Japanese laid-open patent publication No. P2000-200595 A (Jul. 18, 2000).
Japanese laid-open patent publication No. P2001-325937 A (Nov. 22, 2001).
Japanese laid-open patent publication No. H11-329397 (Nov. 30, 1999).

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