Title:
ZINC SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/162334
Kind Code:
A1
Abstract:
Provided is a zinc secondary battery in which a short circuit caused by a defect at a lower end sealing portion of a bag-like hydroxide ion conductive separator hardly occurs. This zinc secondary battery comprises: a positive electrode plate including a positive electrode active material layer; a negative electrode plate that includes a negative electrode active material layer containing at least one selected from the group consisting of zinc, zinc oxide, zinc alloys, and zinc compounds; a hydroxide ion conductive separator that has a bag-like shape for accommodating the negative electrode plate and that separates the positive electrode plate and the negative electrode plate such that hydroxide ions can pass therethrough; an electrolytic solution; and a battery case that vertically accommodates the positive electrode plate, the negative electrode plate, and the hydroxide ion conductive separator. The negative electrode active material layer extends to a position lower than the lower end of the positive electrode active material layer. The height of a portion from the lower end of the negative electrode active material layer to the bottom surface of the battery case is 2.0-8.0 mm. The difference in height between the lower end of the positive electrode active material layer and the lower end of the negative electrode active material layer is 3.0-4.0 mm.
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Inventors:
MATSUYA JUNKI (JP)
Application Number:
PCT/JP2022/039698
Publication Date:
August 31, 2023
Filing Date:
October 25, 2022
Export Citation:
Assignee:
NGK INSULATORS LTD (JP)
International Classes:
H01M10/28; H01M4/42; H01M4/48; H01M4/52; H01M10/30; H01M12/08; H01M50/403; H01M50/414; H01M50/434; H01M50/446; H01M50/46; H01M50/466; H01M50/489
Domestic Patent References:
| WO2021060119A1 | 2021-04-01 | |||
| WO2021193407A1 | 2021-09-30 |
Foreign References:
| JPH0850917A | 1996-02-20 | |||
| JPS4735831A |
Attorney, Agent or Firm:
TAKAMURA Masaharu et al. (JP)
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