リチウムイオン二次電池及びその製造方法

Title:

リチウムイオン二次電池及びその製造方法

Document Type and Number:

Japanese Patent JP6859059

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To enable increase of an effective range based on an electrode active material layer and sure connection between terminal tabs.SOLUTION: Provided is a lithium ion secondary battery having a structure in which: an electrode comprising a positive electrode plate 2 and a negative electrode plate 3 has an active material uncoated portion 3A located at one end side in a length direction X of a current collector 31 and provided at the center portion in a width direction Y in plan view, and has a notched concave portion formed at the center portion in the width direction Y on the other end side in the length direction X of the current collector 31; the current collector 31 has a cut portion 34 formed along a boundary line between an active material non-coated portion 3A and active material coated portions 32a and 32b located on both sides in the width direction Y thereof; the active material uncoated portion 3A cut out by the cut portion 34 forms a terminal tab 5, and a notched concave portion of the negative electrode plate 3 is formed in a region overlapping with the terminal tab of the positive electrode plate 2; and the terminal tabs 5 of the negative electrode plates 3 overlapping with each other in the lamination direction and the terminal tabs of the positive electrode plate 2 are connected to each other.SELECTED DRAWING: Figure 4

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Inventors:

Kazushi Matsushima

Application Number:

JP2016194459A

Publication Date:

April 14, 2021

Filing Date:

September 30, 2016

Export Citation:

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