Title:
BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/085121
Kind Code:
A1
Abstract:
The present invention makes it possible to prevent short-circuiting between a positive electrode and a negative electrode when a separator has been damaged by an external force. The battery comprises an electrode assembly having a positive electrode, a negative electrode, and a film separator. The electrode assembly has a flat shape. When the shortest direction of the electrode assembly is defined as a first direction, the separator has a thickness in at least the first direction, and is provided between the positive electrode and the negative electrode in at least the first direction. When, in a plan view taken in the first direction, a direction in which the distance of mutually opposing edges of the separator becomes the shortest is defined as a second direction, and a direction perpendicular to the first direction and the second direction is defined as a third direction, the angle formed, in a plan view taken in the first direction, between the second direction and a direction in which the tensile strength of the separator becomes the minimum is larger than the angle formed between the third direction and the direction in which the tensile strength of the separator becomes the minimum. In a plan view taken in the first direction, the ratio of the length of the separator in the third direction to the length of the separator in the second direction is 2.0 or more.
Inventors:
GOTOU KENTA (JP)
TANAKA MASATOMO (JP)
MORIZAWA KAZUHIKO (JP)
OSAKA TETSUYA (JP)
TANAKA MASATOMO (JP)
MORIZAWA KAZUHIKO (JP)
OSAKA TETSUYA (JP)
Application Number:
PCT/JP2023/037445
Publication Date:
April 25, 2024
Filing Date:
October 16, 2023
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H01M50/46; H01M10/04; H01M10/052; H01M10/0585; H01M10/0587; H01M50/489; H01M50/494
Foreign References:
| JP2016062876A | 2016-04-25 | |||
| JP2016072233A | 2016-05-09 | |||
| CN113078415A | 2021-07-06 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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