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Secondary battery comprising at least a first and second electrode each coated with an active material layer

  • US 9,147,878 B2
  • Filed: 07/31/2012
  • Issued: 09/29/2015
  • Est. Priority Date: 02/07/2012
  • Status: Active Grant
First Claim
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1. A secondary battery comprising:

  • a plurality of sub electrode assemblies each formed by winding together a first electrode plate and a second electrode plate each coated with an active material layer;

    a current collector; and

    a case accommodating the electrode assemblies and current collector,wherein each sub electrode assemblies comprises;

    at least one or more first sub electrode assemblies; and

    a plurality of second sub electrode assemblies,wherein the first sub electrode assemblies are disposed between the second sub electrode assemblies, andwherein the first sub electrode assemblies are wound with a smaller number of turns than the second sub electrode assemblies.

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