# US 11,908,990 B2 · Power storage device and electronic device

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

- Number: US 11,908,990 B2
- Document ID: US11908990B2
- Status: Granted
- Kind: B2
- Application number: 17/586,022
- Filed: 2022-01-27
- Published: 2022-05-12
- Granted: 2024-02-20
- Earliest claimed: 2015-04-23
- Assignees: Semiconductor Energy Laboratory Co., Ltd.
- Applicants: Semiconductor Energy Laboratory Co., Ltd.
- Inventors: Masayuki Kimura; Junya Goto
- Web page: https://patentgrep.com/patent/US11908990B2

## CPC

- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 10/0436: {Small-sized flat cells or batteries for portable equipment}
- H01M 50/107: having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence)
- H01M 50/119: Metals
- H01M 50/121: Organic material
- H01M 50/124: having a layered structure
- H01M 50/136: Flexibility or foldability
- H01M 10/0459: {Cells or batteries with folded separator between plate-like electrodes}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H01M 2220/30: Batteries in portable systems, e.g. mobile phone, laptop
- 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

To improve the flexibility of a power storage device, or provide a high-capacity power storage device. The power storage device includes a positive electrode, a negative electrode, an exterior body, and an electrolyte. The outer periphery of each of the positive electrode active material layer and the negative electrode active material layer is a closed curve. The exterior body includes a film and a thermocompression-bonded region. The inner periphery of the thermocompression-bonded region is a closed curve. The electrolyte, the positive electrode active material layer, and the negative electrode active material layer are in a region surrounded by the thermocompression-bonded region.

## Claims

### Claim 1

A power storage device comprising:
an electrode; and
an exterior body,
wherein the electrode and the exterior body overlap with each other,
wherein an outer periphery of the exterior body comprises a first side, a second side, and a vertex,
wherein the vertex is a cross point of the first side and the second side,
wherein a distance between an outer periphery of the electrode and the vertex is larger than a distance between the outer periphery of the electrode and a part of the first side,
wherein the outer periphery of the electrode comprises a first region, and
wherein the first region has a shape protruding toward an inner side of the power storage device in a plan view.

### Claim 2 (depends on 1)

The power storage device according to claim 1,
wherein the outer periphery of the exterior body comprises more than four vertexes in the plan view.

### Claim 3 (depends on 1)

The power storage device according to claim 1,
wherein the power storage device has flexibility.

### Claim 4 (depends on 1)

An electronic device comprising:
the power storage device according to claim 1; and
a housing having flexibility.

### Claim 5 (depends on 1)

An electronic device comprising:
the power storage device according to claim 1;
a housing;
a display portion having flexibility;
a logic board; and
a belt portion,
wherein the display portion is bent and round.

### Claim 6 (depends on 5)

The electronic device according to claim 5,
further comprising an antenna, a sensor, a microphone, and a speaker.

### Claim 7 (depends on 5)

The electronic device according to claim 5,
wherein the electronic device is a watch-type device.

### Claim 8

A power storage device comprising:
an electrode; and
an exterior body,
wherein the electrode and the exterior body overlap with each other,
wherein an outer periphery of the electrode comprises a first region, and
wherein the first region has a shape protruding toward an inner side of the power storage device in a plan view.

### Claim 9 (depends on 8)

The power storage device according to claim 8,
wherein an outer periphery of the exterior body comprises a second region, and
wherein the second region is included in an area inside the first region in the plan view.

### Claim 10 (depends on 8)

The power storage device according to claim 8,
wherein the outer periphery of the exterior body comprises more than four vertexes in the plan view.

### Claim 11 (depends on 8)

The power storage device according to claim 8,
wherein the power storage device has flexibility.

### Claim 12 (depends on 8)

An electronic device comprising:
the power storage device according to claim 8; and
a housing having flexibility.

### Claim 13 (depends on 8)

An electronic device comprising:
the power storage device according to claim 8;
a housing;
a display portion having flexibility;
a logic board; and
a belt portion,
wherein the display portion is bent and round.

### Claim 14 (depends on 13)

The electronic device according to claim 13,
further comprising an antenna, a sensor, a microphone, and a speaker.

### Claim 15 (depends on 13)

The electronic device according to claim 13,
wherein the electronic device is a watch-type device.