US 2024/0204263 A1Published application

Bipolar Storage Battery And Manufacturing Method for Bipolar Storage Battery

AssigneesThe Furukawa Battery Co., Ltd., Furukawa Electric Co., Ltd.

InventorsKeizo Yamada, Hideo Nishikubo, Yoshiaki Ogiwara, Hiroshi Kaneko, Hiroki Tanaka

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Abstract

Infiltration of an electrolyte solution into a through hole is prevented or minimized to suppress the occurrence of a liquid junction, so that battery performance is less likely to deteriorate, and the life is prolonged. A cell member includes a positive electrode, a negative electrode, and an electrolyte layer interposed therebetween. The cell member is stacked and disposed at an interval. A space forming member includes a substrate and a frame body. A through hole penetrates between a positive electrode side and a negative electrode side in the space forming member, and a conductor inserted into the through hole electrically connects them. A liquid junction prevention member is provided in a vicinity of an opening on the positive electrode side, a vicinity of an opening on the negative electrode side, or both.

Claims30

Dependent claims

A bipolar storage battery, comprising:

a cell member including a positive electrode including a positive electrode current collector and a positive active material layer, a negative electrode including a negative electrode current collector and a negative active material layer, and an electrolyte layer interposed between the positive electrode and the negative electrode, the cell member being stacked and disposed at an interval;
a space forming member including a substrate covering at least one of a positive electrode side or a negative electrode side of the cell member and a frame body surrounding a side surface of the cell member, the space forming member forming a plurality of spaces individually accommodating a plurality of the cell members;
a through hole formed to penetrate between the positive electrode side and the negative electrode side in the space forming member;
and
a conductor inserted into the through hole to electrically connect the positive electrode side and the negative electrode side,
wherein a liquid junction prevention member is provided in at least one of a vicinity of an opening on the positive electrode side or a vicinity of an opening on the negative electrode side of the through hole.

3 more elements

A manufacturing method for a bipolar storage battery, comprising:

inserting a conductor into a through hole provided to penetrate one surface and another surface of a substrate of a space forming member;
disposing a positive electrode current collector on the one surface;
disposing a negative electrode current collector on the other surface;
disposing a liquid junction prevention member to cover at least one of the through holes from above the positive electrode current collector and the negative electrode current collector;
performing welding to sandwich between the disposed liquid junction prevention member on a side of the positive electrode current collector and the disposed liquid junction prevention member on a side of the negative electrode current collector, or in a case where the liquid junction prevention member is disposed on either the side of the positive electrode current collector or the side of the negative electrode current collector, to sandwich between the liquid junction prevention member and the negative electrode current collector or between the liquid junction prevention member and the positive electrode current collector, and joining the liquid junction prevention member, the positive electrode current collector, the negative electrode current collector, and the conductor;
disposing a positive active material layer to be in contact with the positive electrode current collector;
and
disposing a negative active material layer to be in contact with the negative electrode current collector.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/423,708Filed 26 Jan 2024
Priority: JP 2021-12268227 Jul 2021
Published: 20 Jun 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

H01M 4/68
Selection of materials: for use in lead-acid accumulators
H01M 10/4235
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: safety or regulating additives or arrangements in…
H01M 4/14
Electrodes composed of, or comprising, active material: electrodes for lead-acid accumulators
H01M 4/685
For use in lead-acid accumulators: lead alloys

Family

Application18/423,708Continuation
US 2024/0204263 A1This patent

From the US filing history. Foreign family members aren’t listed.

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