Title:
CYLINDRICAL ALKALINE STORAGE BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/158242
Kind Code:
A1
Abstract:
This alkaline storage battery comprises: a spiral electrode group (22) in which a positive electrode plate (24), a negative electrode plate (26), and a separator (28) are superimposed; an exterior can (10) in which the spiral electrode group is accommodated together with an alkaline electrolytic liquid; and a positive electrode terminal (20) electrically connected to the positive electrode plate. The negative electrode plate includes an outermost peripheral negative electrode plate part (26e) electrically connected with an inner peripheral wall (10a) of the exterior can, an innermost peripheral negative electrode plate part (26f) facing the positive electrode plate only on the outer-peripheral side, and a body negative electrode plate part (26g) that connects the outermost peripheral negative electrode plate part and the innermost peripheral negative electrode plate part. The negative electrode plate includes a negative electrode core (26a), and a negative electrode mixture layer (26b) supported on the negative electrode core. The negative electrode plate is configured such that the porosity of a first negative electrode mixture layer portion (26h) of the negative electrode mixture layer, said portion being positioned at the innermost peripheral negative electrode plate part, is greater than the porosity of a second negative electrode mixture layer portion (26i) of the negative electrode mixture layer, said portion being positioned at the outermost peripheral negative electrode plate part and the body negative electrode plate part.
Inventors:
TAKASU MASARU (JP)
Application Number:
PCT/JP2021/047915
Publication Date:
July 28, 2022
Filing Date:
December 23, 2021
Export Citation:
Assignee:
FDK CORP (JP)
International Classes:
H01M4/24; H01M4/66; H01M10/28
Foreign References:
| JP2013016260A | 2013-01-24 | |||
| JP2000228201A | 2000-08-15 | |||
| JPH07335207A | 1995-12-22 |
Attorney, Agent or Firm:
NAGATO, Kanji (JP)
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