Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Separator – retainer or spacer insulating structure
Reexamination Certificate
2004-02-26
2009-12-08
Crepeau, Jonathan (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Separator, retainer or spacer insulating structure
C429S122000, C429S162000, C429S231950, C429S233000
Reexamination Certificate
active
07629077
ABSTRACT:
An electrode assembly is formed by respectively overlaying a sheet cathode1, a sheet separator3and a double-sided sheet anode8to form a stacked structure10, and subjecting the stacked structure to multiple folds, wherein the initial fold comprises folding the cathode in half around the double-sided anode so as to surround the respective upper and lower active anode surfaces thereof. The multiple folds may comprise one or more subsequent parallel folds made with the fold line D-D extending perpendicular to the original length of the stacked structure such that its overall length is halved at each fold. A pouch battery comprising said electrode assembly has improved safety and performance characteristics. The pouch battery construction has especial application to lithium primary batteries.
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Bowles Peter G
Eweka Emmanuel I
Giwa Cyril O
Ritichie Andrew G
Chuo Tony
Crepeau Jonathan
Nixon & Vanderhye P.C.
Qinetiq Limited
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