# US 10,374,260 B2 · Cylindrical alkaline secondary battery

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- Number: US 10,374,260 B2
- Document ID: US10374260B2
- Status: Granted
- Kind: B2
- Application number: 15/698,504
- Filed: 2017-09-07
- Published: 2018-03-08
- Granted: 2019-08-06
- Earliest claimed: 2016-09-08
- Assignees: Fdk Corporation
- Applicants: Fdk Corporation
- Inventors: Tomomi Nakamura; Hiroyuki Shibaoka; Tetsu Yamanaka; Isao Mugima; Hidefumi Isaji; Hideyuki Asanuma
- Web page: https://patentgrep.com/patent/US10374260B2

## CPC

- H01M 10/24: Alkaline accumulators
- H01M 4/24: Electrodes for alkaline accumulators
- H01M 10/0587: of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
- H01M 10/283: {Cells or batteries with two cup-shaped or cylindrical collectors (H01M10/281 takes precedence)}
- H01M 50/533: characterised by the shape of the leads or tabs
- H01M 50/534: characterised by the material of the leads or tabs
- H01M 50/538: Connection of several leads or tabs of wound or folded electrode stacks
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A nickel-hydrogen secondary battery includes: an outer can; a sealing body including a positive electrode terminal, the sealing body sealing an opening of the outer can; an electrode group formed by placing a positive electrode and a negative electrode on top of each other with a separator therebetween and spirally winding the positive electrode and the negative electrode, the electrode group housed in the outer can along with an alkaline electrolyte; a positive electrode current collector connected to positive electrode connection edge portion protruding from one end surface of the electrode group; and a current collecting lead connecting the positive electrode current collector and the sealing body, wherein a relationship between a deformation resistance A of a material a and a deformation resistance B of a material b satisfies a relationship of A<B, wherein the material a is a material of the current collecting lead, and the material b is a material of the positive electrode current collector.

## Claims

### Claim 1

A cylindrical alkaline secondary battery comprising:
a bottomed cylindrical outer can comprising a negative electrode terminal;
a sealing body comprising a positive electrode terminal, the sealing body sealing an upper end opening of the outer can;
a columnar electrode group formed by placing a positive electrode and a negative electrode on top of each other with a separator therebetween and spirally winding the positive electrode and the negative electrode, the electrode group housed in the outer can along with an alkaline electrolyte;
a current collector connected to an end edge portion of the positive electrode protruding from one end surface of the electrode group; and
a current collecting lead connecting the current collector and the sealing body,
wherein a relationship between a deformation resistance A of a material a and a deformation resistance B of a material b satisfies a relationship of A<B, wherein the material a is a material of the current collecting lead, and the material b is a material of the current collector.

### Claim 2 (depends on 1)

The cylindrical alkaline secondary battery according to claim 1, wherein:
a thickness of the material b is thicker than a thickness of the material a to satisfy the relationship of A<B.

### Claim 3 (depends on 1)

The cylindrical alkaline secondary battery according to claim 1, wherein:
a hardness of the material b is higher than a hardness of the material a to satisfy the relationship of A<B.

### Claim 4 (depends on 1)

The cylindrical alkaline secondary battery according to claim 1, wherein:
the material a is pure Ni, and the material b is Ni-plated steel to satisfy the relationship of A<B.

### Claim 5 (depends on 1)

The cylindrical alkaline secondary battery according to claim 1, wherein:
the current collecting lead comprises:
a rectangular top wall portion connected to the sealing body;
a side wall portion extending from a predetermined side edge of the top wall portion toward the current collector; and
a leg portion provided on an end edge of the side wall portion and connected to the current collector; and
a length of the side wall portion in a direction from the top wall portion toward the leg portion is equivalent to a length between the sealing body and the current collector.

### Claim 6 (depends on 5)

The cylindrical alkaline secondary battery according to claim 5, wherein:
the side wall portion comprises a deformation promoting portion that promotes local deformation when compressive stress is applied in a direction in which the current collector and the sealing body approach with each other.

### Claim 7 (depends on 1)

The cylindrical alkaline secondary battery according to claim 1, wherein:
the current collector comprises projections protruding toward the electrode group.

### Claim 8 (depends on 7)

The cylindrical alkaline secondary battery according to claim 7, wherein:
the projections are burrs provided on notched edge portions formed on a plate surface of the current collector.