Title:
リチウムイオン二次電池素子、リチウムイオン二次電池およびリチウムイオン二次電池素子を製造する方法
Document Type and Number:
Japanese Patent JP7408297
Kind Code:
B2
Abstract:
In a lithium ion secondary battery element, a positive electrode and a negative electrode are overlapped on each other so that a positive electrode active material layer with a generally rectangular shape in the positive electrode and a negative electrode active material layer with a generally rectangular shape in the negative electrode are overlapped on each other substantially perfectly and a positive electrode active material non-applied part of the positive electrode and a negative electrode active material non-applied part of the negative electrode are positioned on opposing sides of the rectangle. A border part between the negative electrode active material applied part and the negative electrode active material non-applied part is positioned closer to a peripheral side of a negative electrode current collector than a peripheral part of a positive electrode current collector. A border part between a negative electrode active material layer flat part and a negative electrode active material layer thin part is positioned closer to a central side of the negative electrode current collector than the peripheral part of the positive electrode current collector. The negative electrode active material layer thin part has a density that is equal to or smaller than that of the negative electrode active material layer flat part.
Inventors:
Yosuke Kita
Aika Kimura
Toshihiro Horiuchi
Aika Kimura
Toshihiro Horiuchi
Application Number:
JP2019100452A
Publication Date:
January 05, 2024
Filing Date:
May 29, 2019
Export Citation:
Assignee:
AESC Japan Co., Ltd.
International Classes:
H01M10/058; H01M4/13; H01M4/139; H01M10/052; H01M10/0566; H01M50/586; H01M50/595
Domestic Patent References:
| JP2012074359A | ||||
| JP2019003789A |
Foreign References:
| WO2017130821A1 | ||||
| WO2013187172A1 |
Attorney, Agent or Firm:
Patent Attorney Corporation Global IP Tokyo