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Electrode body for use in non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery

  • US 10,454,140 B2
  • Filed: 12/06/2017
  • Issued: 10/22/2019
  • Est. Priority Date: 02/05/2010
  • Status: Active Grant
First Claim
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1. An electrode body for use in non-aqueous electrolyte secondary battery, the electrode body comprising a positive electrode plate, a negative electrode plate and a separator interposed between the positive and negative electrode plates, the positive electrode plate, negative electrode plate and separator overlapping one another with their widths oriented in the same direction,wherein the positive electrode plate has a positive current collector and a positive electrode mixture layer applied to a surface of the positive current collector;

  • the negative electrode plate has a negative current collector and a negative electrode mixture layer applied to a surface of the negative current collector;

    the separator has a first end located at one end thereof and a second end located at the other end thereof with respect to a width direction and has an intermediate portion located between the first and second ends;

    with respect to the width direction, the first separator end is located more interiorly than one positive electrode end which is located at one end of the positive electrode plate with respect to the width direction;

    located more exteriorly than one end of a coated positive electrode portion of the positive electrode plate which portion is coated with the positive electrode mixture layer; and

    located more exteriorly than one end of a coated negative electrode portion of the negative electrode plate which portion is coated with the negative electrode mixture layer, the first separator end being heat-welded to a portion of the positive electrode plate which portion is opposed to the separator in its thickness direction; and

    with respect to the width direction, the second separator end is located more interiorly than an other negative electrode end which is located at an other end of the negative electrode plate with respect to the width direction;

    located more exteriorly than an other end of the coated positive electrode portion; and

    located more exteriorly than an other end of the coated negative electrode portion, the second separator end being heat-welded to a portion of the negative electrode plate which portion is opposed to the separator in its thickness direction.

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