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Patent Searching and Data


Title:
LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2019/044839
Kind Code:
A1
Abstract:
A lithium ion secondary battery 100 having a structure for which a plurality of positive electrodes 11 and negative electrodes 12 are alternatingly laminated, wherein, of the plurality of laminated positive electrodes 11 and negative electrodes 12, the electrodes other than the electrodes of the outermost layer have an electrode current collector and an electrode mixture layer formed on both surfaces of the electrode current collector, and at least one electrode of the electrodes of the outermost layer has an electrode current collector and a single-sided electrode mixture layer formed only on the surface of the inside of the lamination direction of the electrode current collector. The thickness of the single-sided electrode mixture layer is less than the thickness of the electrode mixture layer of the electrodes that are of the same polarity as the single-sided electrode having the single-sided electrode mixture layer, and that are positioned substantially centrally in the lamination direction. The capacity ratio of opposing negative electrodes 12 and positive electrodes 11 is approximately the same in all layers.

Inventors:
SHIBATA HIDETAKA (JP)
Application Number:
PCT/JP2018/031779
Publication Date:
March 07, 2019
Filing Date:
August 28, 2018
Export Citation:
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Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M10/0585; H01M4/13; H01M10/052
Foreign References:
JP2014026944A2014-02-06
JP2018078052A2018-05-17
US20170214031A12017-07-27
Attorney, Agent or Firm:
NISHIZAWA, Hitoshi et al. (JP)
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