# US 12,183,890 B2 · All-solid-state secondary battery

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- Number: US 12,183,890 B2
- Document ID: US12183890B2
- Status: Granted
- Kind: B2
- Application number: 17/435,470
- Filed: 2020-03-16
- Published: 2022-02-17
- Granted: 2024-12-31
- Earliest claimed: 2019-03-15
- Assignees: TDK Corporation
- Applicants: TDK Corporation
- Inventors: Kazumasa Tanaka
- Web page: https://patentgrep.com/patent/US12183890B2

## CPC

- 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 10/052: Li-accumulators
- H01M 50/545: formed by the casing of the cells (cup shaped terminals adapted for cells having curved cross-section H01M50/56)
- H01M 50/548: on opposite sides of the cell
- 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

An all-solid-state secondary battery includes a laminated body in which a positive electrode layer and a negative electrode layer are laminated via a solid electrolyte layer, a first external terminal, and a second external terminal, the laminated body has a first side surface parallel to a laminating direction and a second side surface parallel to the laminating direction and perpendicular to the first side surface, the first external terminal and the second external terminal are connected to the first side surface, and the laminated body has a warp in the laminating direction satisfying Equations (1) and (2): 0.5°≤((A1+A2)/2)≤5° (1) A1≤8.0° (2) here, A1 is a warp angle of the laminated body when seen from a side of the first side surface, and A2 is a warp angle of the laminated body when seen from a side of the second side surface.

## Claims

### Claim 1

An all-solid-state secondary battery comprising:
a laminated body in which a positive electrode layer having a positive electrode current collector layer and a positive electrode active material layer, and a negative electrode layer having a negative electrode current collector layer and a negative electrode active material layer are laminated via a solid electrolyte layer;
a first external terminal; and
a second external terminal,
wherein the laminated body has a first side surface parallel to a laminating direction and a second side surface parallel to the laminating direction and perpendicular to the first side surface,
the first external terminal and the second external terminal are connected to the first side surface, and
the laminated body has a warp that is warped in the laminating direction and satisfies Equations (1) and (2):
0.5°≤((A1+A2)/2)≤5° (1)
A1≤8.0° (2),
where A1 is an angle of the warp of the laminated body when seen from a side of the first side surface, and A2 is an angle of the warp of the laminated body when seen from a side of the second side surface.

### Claim 2 (depends on 1)

The all-solid-state secondary battery according to claim 1, wherein Equation (3) is satisfied:
0.5°≤((A1+A2)/2)≤4° (3).

### Claim 3 (depends on 1)

The all-solid-state secondary battery according to claim 1, wherein the solid electrolyte layer is at least one selected from the group consisting of a Perovskite type compound, a Lisicon type compound, a Garnet type compound, a Nasicon type compound, a Thio-Lisicon type compound, a glass compound, and a phosphate compound.