Title:
NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/043145
Kind Code:
A1
Abstract:
This nonaqueous electrolyte secondary battery is characterized by comprising an electrode body (14) which is obtained by winding a positive electrode (11) and a negative electrode (12) with a pair of separators (13) being interposed therebetween, and is also characterized in that: the negative electrode (12) has a non-facing part (12a) that does not face the positive electrode (11) with the pair of separators (13) being interposed therebetween; the non-facing part (12a) is wound with 1.5 turns or more from the inner end of the electrode body (14) in the winding direction; at least one of the pair of separators (13) comprises a base material layer and a functional layer that is formed on the base material layer; the functional layer comprises a heat-resistant layer that contains inorganic particles, and resin particles that are dispersed in the heat-resistant layer and have an average particle diameter that is larger than the thickness of the heat-resistant layer; the resin particles form projected parts that protrude from the surface of the heat-resistant layer; and the functional layer of at least one of the pair of separators (13) faces the positive electrode (11).
Inventors:
KITAYAMA GODAI
KASAMATSU SHINJI
KASAMATSU SHINJI
Application Number:
PCT/JP2023/029513
Publication Date:
February 29, 2024
Filing Date:
August 15, 2023
Export Citation:
Assignee:
PANASONIC ENERGY CO LTD (JP)
International Classes:
H01M10/0587; H01M4/133; H01M4/134; H01M4/36; H01M4/38; H01M10/052; H01M10/0566; H01M50/414; H01M50/434; H01M50/443; H01M50/446; H01M50/451; H01M50/46; H01M50/463
Domestic Patent References:
| WO2022114228A1 | 2022-06-02 | |||
| WO2018116876A1 | 2018-06-28 | |||
| WO2020262437A1 | 2020-12-30 |
Foreign References:
| JP2015099777A | 2015-05-28 | |||
| JP2007123237A | 2007-05-17 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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