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US 6,605,382 B2Granted
Lithium ion battery suitable for hybrid electric vehicles
AssigneeQuallion LLC
InventorsAlan Ruth, Andy Szyszkowski, Clay Kishiyama, Hiroyuki Yumoto, Hisashi Tsukamoto
Life of this patent
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Abstract
A lithium ion battery configured to yield a high energy density output by minimizing head space, i.e., wasted interior volume, within the battery case and/or by reducing electrical energy losses internal to the battery.
Claims6
A battery comprising:
- a tubular case comprising an electrically conductive wall enclosing an interior volume, said case defining open first and second ends;
- an electrode assembly comprising helically wound first and second electrode strips spaced by at least one separator strip, said first assembly including a first set of spaced tabs extending in a first direction from said first electrode strip and a second set of spaced tabs extending in a second direction from said second electrode strip;
- means mounting said electrode assembly in said interior volume with said first set of tabs proximate to said case open first end and said second set of tabs proximate to said case open second end;
- a dielectric member mounted in said interior volume close to said case first end;
- an electrically conductive ring mounted on said dielectric member close to said case first end and electrically insulated from said case wall;
- means electrically connecting said first set of tabs to said electrically conductive ring;
- an electrically conductive first end cap;
- and wherein
- said first end cap is secured to said case wall first end proximate to said conductive ring to minimize empty interior volume therebetween.
6 more elements
A battery comprising:
- a tubular metal case having open first and second ends and defining an interior volume;
- a dielectric member mounted in said case adjacent to said first open end;
- a metal member supported by said dielectric member;
- an electrode assembly comprising a first polarity electrode strip and a second polarity electrode strip helically wound together with a separator strip between adjacent layers;
- a first plurality of first polarity metal tabs connected to spaced points along said first polarity electrode strip;
- a second plurality of second polarity metal tabs connected to spaced points along said second polarity electrode strip;
- said first and second pluralities of metal tabs extending in opposite directions from said electrode assembly;
- and wherein
- said electrode assembly is mounted in said interior volume with said first plurality of tabs electrically connected to said metal member and with said second plurality of tabs pinched between the case second end and a metal end cap secured to said case second end.
6 more elements
Dependencies are inferred from the claim text.