Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/024385
Kind Code:
A1
Abstract:
A nonaqueous electrolyte secondary battery according to the present disclosure is provided with an electrode group which comprises a positive electrode 5, a negative electrode 6 and a separator 7, while having a wound structure. The electrode group satisfies at least one configuration selected from the group consisting of configuration (A) and configuration (B). (A): The electrode group comprises an insulating protective tape 9 which is bonded to a region 60 that ranges from a surface of a negative electrode active material layer 6b, the surface facing the separator 7, to an exposed portion of a negative electrode collector 6a via an end face of the negative electrode active material layer 6b at least at one end part of the negative electrode 6 in the longitudinal direction. (B): The electrode group comprises an insulating protective tape which is bonded to a surface of the negative electrode active material layer 6b, the surface facing the separator 7, in a region of the negative electrode 6, the region facing a positive electrode lead part of the positive electrode 5. The base material of the protective tape 9 is a resin-based microporous film that has a compressive deformation ratio of 30% to 50% when a load of 50 kg/cm2 is applied thereto.
Inventors:
INOUE KAORU
Application Number:
PCT/JP2023/024249
Publication Date:
February 01, 2024
Filing Date:
June 29, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M10/0587; H01M4/36; H01M4/38; H01M4/58; H01M10/052; H01M50/586; H01M50/595
Domestic Patent References:
| WO2019049479A1 | 2019-03-14 | |||
| WO2018180748A1 | 2018-10-04 | |||
| WO2021020151A1 | 2021-02-04 |
Foreign References:
| JP2017216160A | 2017-12-07 |
Attorney, Agent or Firm:
KAMADA Koichi et al. (JP)
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