# US 11,114,699 B2 · Battery and battery manufacturing method with folded construction

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,114,699 B2
- Document ID: US11114699B2
- Status: Granted
- Kind: B2
- Application number: 16/855,640
- Filed: 2020-04-22
- Published: 2020-08-06
- Granted: 2021-09-07
- Earliest claimed: 2017-02-24
- Assignees: Panasonic Intellectual Property Management Co., Ltd.
- Applicants: Panasonic Intellectual Property Management Co., Ltd.
- Inventors: Kazuyoshi Honda
- Web page: https://patentgrep.com/patent/US11114699B2

## CPC

- H01M 10/0583: of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- H01M 4/70: characterised by shape or form
- H01M 4/75: Wires, rods or strips
- H01M 10/0404: {Machines for assembling batteries}
- H01M 10/0431: {Cells with wound or folded electrodes (H01M10/045 takes precedence)}
- H01M 10/0463: {Cells or batteries with horizontal or inclined electrodes}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/052: Li-accumulators
- H01M 10/0562: Solid materials
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A battery includes a first current collector, first electrode layer, and first counter electrode layer. The first counter electrode layer is a counter electrode of the first electrode layer. The first current collector includes first front and rear face regions, second front and rear face regions, and a first fold portion. The first rear face region is a region situated on the rear face of the first front face region. The second rear face region is a region situated on the rear face of the second front face region. The first fold portion is situated between the first and second front face regions. The first current collector is folded at the first fold portion, whereby the first and second rear face regions face each other. The first electrode layer is in contact with the second front face region, and the first counter electrode layer with the first front face region.

## Claims

### Claim 1

A battery manufacturing method using a battery manufacturing apparatus,
wherein the battery manufacturing apparatus includes an electrode layer forming unit, a counter electrode layer forming unit, a solid electrolyte layer forming unit, and a current collector folding unit that folds a current collector,
wherein the current collector includes a first front face region, a first rear face region, a second front face region, a second rear face region, and a first fold region,
wherein the first rear face region is a region situated on the rear face of the first front face region,
wherein the second rear face region is a region situated on the rear face of the second front face region,
wherein the first fold region is a region situated between the first front face region and the second front face region,
the method comprising steps of:
forming (a1) the first electrode layer in contact with the second front face region by the electrode layer forming unit;
forming (b1) the first counter electrode layer, which is a counter electrode of the first electrode layer, in contact with the first front face region, by the counter electrode layer forming unit;
forming a first solid electrolyte layer on the first fold region by the solid electrolyte layer forming unit; and
folding (c1) the first fold region by the current collector folding unit,
wherein the first rear face region and the second rear face region are positioned facing each other, due to the current collector being folded at the first fold region in the folding step (c1).

### Claim 2 (depends on 1)

The battery manufacturing method according to claim 1,
wherein the battery manufacturing apparatus further includes a cutting unit,
wherein the current collector includes a first linking portion adjacent to the first front face region, and an outer region adjacent to the first linking portion,
the method further comprising steps of:
forming (a0) an outer electrode layer, which is a counter electrode of the first counter electrode layer, in contact with the outer region, by the electrode layer forming unit;
forming (d1) the first solid electrolyte layer on at least one of the first counter electrode layer and outer electrode layer by the solid electrolyte layer forming unit;
folding (e1) the first linking portion by the current collector folding unit, after the forming step (d1); and
cutting (f1) the first linking portion by the cutting unit, after the folding step (e1),
wherein the first solid electrolyte layer is interposed between the first counter electrode layer and the outer electrode layer, due to the current collector being folded at the first linking portion by the current collector folding unit in the folding step (e1).

### Claim 3 (depends on 2)

The battery manufacturing method according to claim 2,
wherein the current collector includes a second linking portion adjacent to the second front face region and a third front face region adjacent to the second linking portion,
the method further comprising steps of:
forming (b2) a second counter electrode layer, which is a counter electrode of the first electrode layer, in contact with the third front face region, by the counter electrode layer forming unit;
forming (d2) a second solid electrolyte layer on at least one of the first electrode layer and the second counter electrode layer by the solid electrolyte layer forming unit;
folding (e2) the second linking portion by the current collector folding unit after the forming step (d2); and
cutting (f2) the second linking portion by the cutting unit after the folding (e2),
wherein the second solid electrolyte layer is interposed between the first electrode layer and the second counter electrode layer, due to the current collector being folded at the second linking portion by the current collector folding unit in the folding step (e2).

### Claim 4 (depends on 3)

The battery manufacturing method according to claim 3,
wherein a first solid electrolyte layer is formed on a part of the first fold region by the solid electrolyte layer forming unit in the forming step (d1),
or,
a second solid electrolyte layer is formed on part of the first fold region by the solid electrolyte layer forming unit in the forming step (d2).

### Claim 5 (depends on 1)

The battery manufacturing method according to claim 1,
wherein the first rear face region and second rear face region come into contact with each other, due to the current collector being folded at the first fold region by the current collector folding unit in the folding step (c1).

### Claim 6 (depends on 1)

The battery manufacturing method according to claim 1,
wherein the battery manufacturing apparatus further includes an adhesion portion forming unit that forms a first adhesion portion that adheres the first rear face region and second rear face region to each other,
the method further comprising a step of:
forming (g1) the first adhesion portion in contact with at least one of the first rear face region and the second rear face region, by the adhesion portion forming unit.

### Claim 7 (depends on 1)

The battery manufacturing method according to claim 1,
wherein the current collector includes a second linking portion adjacent to the second front face region, a third front face region adjacent to the second linking portion, a third rear face region, a fourth front face region, a fourth rear face region, and a second fold region,
wherein the third rear face region is a region situated at the rear face of the third front face region,
wherein the fourth rear face region is a region situated at the rear face of the fourth front face region,
wherein the second fold region is a region situated between the third front face region and fourth front face region,
the method further comprising steps of:
forming (a2) a second electrode layer in contact with the fourth front face region by the electrode layer forming unit;
forming (b2) a second counter electrode layer, which is a counter electrode of the first electrode layer and the second electrode layer, in contact with the third front face region, by the counter electrode layer forming unit;
folding (c2) the second fold region by the current collector folding unit;
forming (d2) a second solid electrolyte layer on at least one of the first electrode layer and the second counter electrode layer by the solid electrolyte layer forming unit;
folding (e2) the second linking portion by the current collector folding unit after the forming step (d2); and
cutting (f2) the second linking portion by the cutting unit after the folding step (e2),
wherein the second solid electrolyte layer is interposed between the first electrode layer and second counter electrode layer, due to the current collector being folded at the second linking portion by the current collector folding unit in the folding step (e2).