All solid state battery

Patent metadata

Field	Value
Publication number	US-11764396-B2
Application number	US-202117156031-A
Country	US
Kind code	B2
Filing date	Jan 22, 2021
Priority date	Jan 31, 2020
Publication date	Sep 19, 2023
Grant date	Sep 19, 2023

Abstract

An all solid state battery in which shift in positions of a plurality of a cell unit arranged along a thickness direction can be prevented is provided. The all solid state battery includes a plurality of the cell unit connected in series. The all solid state battery includes a cell unit A and a cell unit B, a second current collector AY in the cell unit A and a second current collector BX in the cell unit B are arranged to face each other interposing a first insulating portion, and a tab AX, a tab AY, and a tab B are fixed by a fixing member.

First claim

What is claimed is:

1. An all solid state battery comprising a plurality of a cell unit 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 unit,
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,
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, and
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 first insulating portion,
the second current collector AX includes a tab AX at a position not overlapping the second active material layer AX in planar view,
the second current collector AY includes a tab AY at a position not overlapping the second active material layer AY in planar view,
the first current collector B includes a tab B at a position not overlapping the first active material layer BX and the first active material layer BY in planar view,
the tab AX, the tab AY, and the tab B are fixed by a fixing member,
the fixing member includes a first holding portion, a second holding portion, and a connecting portion connecting the first holding portion and the second holding portion, and
the tab AX, the tab AY, and the tab B are sandwiched and fixed between the first holding portion and the second holding portion of the fixing member,
wherein the fixing member includes an insulating shock absorbing portion formed on at least one of an outer surface side of the first holding portion and an outer surface side of the second holding portion,
wherein the insulating shock absorbing portion comprises a rubber, and
wherein the insulating shock absorbing portion is formed continuously on at least one of the outer surface side of the first holding portion and the outer surface side of the second holding portion.

2. The all solid state battery according to claim 1 , wherein the fixing member is elastic.

3. The all solid state battery according to claim 1 , wherein a second insulating portion is arranged on at least one of an end surface, which is a side surface of the tab AX, of the first active material layer AX, and an end surface, which is a side surface of the tab AY, of the first active material layer AY.

4. The all solid state battery according to claim 1 , wherein the fixing member includes an elastic filling portion formed on at least one of an inner surface side of the first holding portion and an inner surface side of the second holding portion.

5. The all solid state battery according to claim 1 , wherein a conductive adhesive portion is arranged on at least one of a position between the tab AX and the tab AY, and a position between the tab AY and the tab B.

6. The all solid state battery according to claim 1 , wherein a plated portion is arranged on at least one of a position between the tab AX and the tab AY, and a position between the tab AY and the tab B.

7. The all solid state battery according to claim 4 , wherein the elastic filling portion comprises a resin or a rubber.

8. The all solid state battery according to claim 4 , wherein the elastic filling portion is formed continuously on at least one of the inner surface side of the first holding portion and the inner surface side of the second holding portion.

9. An all solid state battery comprising a plurality of a cell unit 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 unit,
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,
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, and
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 first insulating portion,
the second current collector AX includes a tab AX at a position not overlapping the second active material layer AX in planar view,
the second current collector AY includes a tab AY at a position not overlapping the second active material layer AY in planar view,
the first current collector B includes a tab B at a position not overlapping the first active material layer BX and the first active material layer BY in planar view,
the tab AX, the tab AY, and the tab B are fixed by a fixing member,
the fixing member includes a first holding portion, a second holding portion, and a connecting portion connecting the first holding portion and the second holding portion, and
the tab AX, the tab AY, and the tab B are sandwiched and fixed between the first holding portion and the second holding portion of the fixing member,
wherein the fixing member includes an insulating shock absorbing portion formed on at least one of an outer surface side of the first holding portion and an outer surface side of the second holding portion, and the fixing member includes an elastic filling portion formed on at least one of an inner surface side of the first holding portion and an inner surface side of the second holding portion.

10. The all solid state battery according to claim 9 , wherein the fixing member is elastic.

11. The all solid state battery according to claim 9 , wherein the insulating shock absorbing portion comprises a resin.

12. The all solid state battery according to claim 9 , wherein the insulating shock absorbing portion comprises a rubber.

13. The all solid state battery according to claim 9 , wherein the elastic filling portion comprises a resin or a rubber.

14. The all solid state battery according to claim 9 , wherein a conductive adhesive portion is arranged on at least one of a position between the tab AX and the tab AY, and a position between the tab AY and the tab B.

15. The all solid state battery according to claim 9 , wherein a plated portion is arranged on

Assignees

• Toyota Motor Co Ltd

Inventors

• Yamamoto Satomi
• Omori Keisuke
• Hasegawa Hajime

Classifications

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2004/029

  Bipolar electrodes · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title