# US 11,309,603 B2 · Square secondary battery, battery module, storage device, vehicle, and flying object

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- Number: US 11,309,603 B2
- Document ID: US11309603B2
- Status: Granted
- Kind: B2
- Application number: 16/807,225
- Filed: 2020-03-03
- Published: 2020-06-25
- Granted: 2022-04-19
- Earliest claimed: 2017-09-26
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Tatsuya Shinoda; Nobuyasu Negishi
- Web page: https://patentgrep.com/patent/US11309603B2

## CPC

- H01M 50/103: prismatic or rectangular (H01M50/109, H01M50/11 take precedence)
- H01M 50/209: adapted for prismatic or rectangular cells (H01M50/216 takes precedence)
- H01M 50/15: for prismatic or rectangular cells (H01M50/153 takes precedence)
- H01M 50/55: on the same side of the cell
- H01M 50/553: Terminals adapted for prismatic, pouch or rectangular cells
- H01M 50/271: Lids or covers for the racks or secondary casings
- H01M 50/296: characterised by terminals of battery packs (terminals of batteries H01M50/543)
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- 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 square secondary battery of an embodiment includes an outer can formed in a shape of a bottomed cylinder having a cross-sectional shape of a substantially quadrangular shape, the outer can having an opening, a power generation element contained in the outer can, and a lid having a positive electrode terminal and a negative electrode terminal, the lid covering the opening of the outer can. Two or more convex portions exist on each of one or more surfaces of a side surface of an outer surface of the outer can, a bottom surface of the outer surface of the outer can, and a surface having the positive electrode terminal and the negative electrode terminal of an outer surface of the lid.

## Claims

### Claim 1

A rectangular secondary battery, comprising:
an outer can formed in a shape of a bottomed cylinder having a cross-sectional shape of a substantially quadrangular shape, the outer can having an opening;
a power generation element contained in the outer can; and
a lid having a positive electrode terminal and a negative electrode terminal, the lid covering the opening of the outer can, wherein
four convex portions exist on each of one or more sides of a side surface of an outer surface of the outer can, a bottom surface of the outer surface of the outer can, and a surface having the positive electrode terminal, and the negative electrode terminal being the outer surface of the lid,
each of the convex portions on the side surface of the outer can exist within a range of 10 mm or less from each of corners of respective of the side surface of the outer surface of the outer can,
each of the convex portions on the bottom surface of the outer can exist within a range of 10 mm or less from each of corners of respective of the bottom surface of the outer surface of the outer can, and
each of the convex portions on the lid of the outer can exist within a range of 10 mm or less from each of corners of respective of the surface having the positive electrode terminal and the negative electrode terminal of the outer surface of the lid.

### Claim 2 (depends on 1)

The rectangular secondary battery according to claim 1, wherein heights of the convex portions are 0.05 mm or more and 0.5 mm or less.

### Claim 3 (depends on 1)

The rectangular secondary battery according claim 1, wherein the convex portions have a hemispherical or conical shape.

### Claim 4 (depends on 1)

The rectangular secondary battery according to claim 1, wherein
the convex portions on the bottom surface of the outer can and the convex portions on the lid of the outer can have a linear shape,
the linear convex portions exist within a range of 10 mm or less from respective of two short sides of the bottom surface of the outer surface of the outer can, one linear convex portion existing at each of the short sides, and
the linear convex portions exist within a range of 10 mm or less from respective of two short sides of the surface having the positive electrode terminal and the negative electrode terminal of the outer surface of the lid, one linear convex portion existing at each of the short sides.

### Claim 5 (depends on 1)

The rectangular secondary battery according to claim 1, wherein
a length of a short side of the bottom surface of the outer surface of the outer can is 5 mm or more and 45 mm or less,
a length of a long side of the bottom surface of the outer surface of the outer can is 60 mm or more and 180 mm or less,
a length of a short side of the surface having the positive electrode terminal and the negative electrode terminal of the outer surface of the lid is 5 mm or more and 45 mm or less, and
a length of a long side of the surface having the positive electrode terminal and the negative electrode terminal of the outer surface of the lid is 60 mm or more and 180 mm or less.

### Claim 6 (depends on 1)

A battery module comprising the rectangular secondary battery according to claim 1.

### Claim 7 (depends on 6)

A storage device comprising the battery module according to claim 6.

### Claim 8 (depends on 6)

A vehicle comprising the battery module according to claim 6.

### Claim 9 (depends on 6)

A flying object comprising the battery module according to claim 6.