# US 2021/0242544 A1 · All solid state battery

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- Number: US 2021/0242544 A1
- Document ID: US20210242544A1
- Status: Published application
- Kind: A1
- Application number: 17/159,428
- Filed: 2021-01-27
- Published: 2021-08-05
- Earliest claimed: 2020-01-31
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Hajime Hasegawa; Takumi Tanaka; Satomi Yamamoto; Koichi Tanimoto
- Web page: https://patentgrep.com/patent/US20210242544A1

## CPC

- H01M 10/0413: {Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes}
- H01M 50/536: characterised by the method of fixing the leads to the electrodes, e.g. by welding
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 10/281: {Large cells or batteries with stacks of plate-like electrodes}
- H01M 10/647: Prismatic or flat cells, e.g. pouch cells
- H01M 50/533: characterised by the shape of the leads or tabs
- H01M 10/052: Li-accumulators
- 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 battery in which positional displacement of a plurality of cells arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of cells connected in series, wherein the all solid state battery includes a cell unit A and a cell unit B, a first current collector A in the cell A and a second current collector B in the cell B are arranged to face each other, the first current collector A includes a tab A, the second current collector B includes a tab B, and the tab A and the tab B are fixed by a fixing portion.

## Claims

### Claim 1

An all solid state battery comprising a plurality of cells arranged along a thickness direction and connected in series,
the all solid state battery includes a cell A and a cell B as the cells,
the cell A includes a first current collector A, a first active material layer A, a solid electrolyte layer A, a second active material layer A and a second current collector A, in this order,
the cell B includes a first current collector B, a first active material layer B, a solid electrolyte layer B, a second active material layer B and a second current collector B, in this order,
the first current collector A in the cell A and the second current collector B in the cell B are arranged to face each other,
the first current collector A includes a tab A at a position not overlapping with the first active material layer A in plan view,
the second current collector B includes a tab B at a position not overlapping with the second active material layer B in plan view, and
the tab A and the tab B are fixed by a fixing portion.

### Claim 2 (depends on 1)

The all solid state battery according to claim 1, wherein a first insulating portion is arranged on a surface of the tab B facing away from the tab A, and
an outer edge of the first insulating portion is located on an outer side with respect to an outer edge of the tab A in plan view.

### Claim 3 (depends on 2)

The all solid state battery according to claim 2, wherein an outer edge of the tab B is located on an outer side with respect to the outer edge of the tab A in plan view.

### Claim 4 (depends on 2)

The all solid state battery according to claim 2, wherein the tab A and the tab B are bent so as the first insulating portion is on an outside, and the fixing portion is located on an inner side with respect to a bending center.

### Claim 5 (depends on 1)

The all solid state battery according to claim 1, wherein an insulating adhesive portion is arranged on at least one surface of the fixing portion.

### Claim 6 (depends on 1)

The all solid state battery according to claim 1, wherein the fixing portion is a welded portion.

### Claim 7

An all solid state battery comprising a plurality of cell units arranged along a thickness direction and connected in series,
the all solid state battery includes a cell unit A and a cell unit B as the cell units,
the cell unit A includes:
a first current collector A,
a first active material layer AX, a solid electrolyte layer AX, a second active material layer AX and a second current collector AX, arranged in order from a first surface side of the first current collector A, and
a first active material layer AY, a solid electrolyte layer AY, a second active material layer AY and a second current collector AY, arranged in order from a second surface side opposite to the first surface side of the first current collector A,
the cell unit B includes:
a first current collector B, and
a first active material layer BX, a solid electrolyte layer BX, a second active material layer BX and a second current collector BX, arranged in order from a first surface side of the first current collector B,
a first active material layer BY, a solid electrolyte layer BY, a second active material layer BY and a second current collector BY, arranged in order from a second surface side opposite to the first surface side of the first current collector B,
the second current collector AY in the cell unit A, and the second current collector BX in the cell unit B are arranged to face each other, interposing a second insulating portion,
the second current collector AX includes a tab AX at a position not overlapping with the second active material layer AX in plan view,
the second current collector AY includes a tab AY at a position not overlapping with the second active material layer AY in plan view,
the first current collector B includes a tab B at a position not overlapping with the first active material layer BX and the first active material layer BY in plan view, and
the tab AX, the tab AY, and the tab B are fixed by a fixing portion.

### Claim 8 (depends on 7)

The all solid state battery according to claim 7, wherein a first insulating portion is arranged on a surface of the tab AX facing away from the tab AY, and
an outer edge of the first insulating portion is located on an outer side of an outer edge with respect to the tab B in plan view.

### Claim 9 (depends on 8)

The all solid state battery according to claim 8, wherein an outer edge of the tab AX is located on the outer side with respect to the outer edge of the tab B in plan view.

### Claim 10 (depends on 8)

The all solid state battery according to claim 8, wherein the tab AX, the tab AY, and the tab B are bent so as the first insulating portion is on an outer side, and
the fixing portion is located on an inner side with respect to a bending center.

### Claim 11 (depends on 7)

All solid state battery according to claim 7, wherein an insulating adhesive portion is arranged on at least one surface of the fixing portion.

### Claim 12 (depends on 7)

The all solid state battery according to claim 7, wherein the fixing portion is a welded portion.