# US 12,015,116 B2 · All-solid-state battery manufacturing method

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- Number: US 12,015,116 B2
- Document ID: US12015116B2
- Status: Granted
- Kind: B2
- Application number: 18/188,530
- Filed: 2023-03-23
- Published: 2023-07-20
- Granted: 2024-06-18
- Earliest claimed: 2020-07-09
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Takuya Sakamoto; Yuki Nishibu; Tomoya Hioki; Masato Ono; Yosuke Koide; Kazumasa Inata
- Web page: https://patentgrep.com/patent/US12015116B2

## CPC

- H01M 10/0404: {Machines for assembling batteries}
- H01M 10/0468: {Compression means for stacks of electrodes and separators}
- H01M 4/043: {involving compressing or compaction}
- H01M 4/0435: {Rolling or calendering}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 4/134: Electrodes based on metals, Si or alloys
- H01M 4/625: {Carbon or graphite}
- 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 2300/0068: inorganic
- 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 manufacturing apparatus disclosed herein includes a transport apparatus, a press roller, and an adhesive provision apparatus. The transport apparatus transports an active material layer. The press roller has a foil attachment surface, which is a cylindrical surface to which the current collection foil is to be attached. The press roller rotates and moves the current collection foil attached to the foil attachment surface to the surface of the active material layer being transported by the transport apparatus and presses the current collection foil and the active material layer between the press roller and the transport apparatus. The adhesive provision apparatus is provided on a movement path of the current collection foil rotated and moved by the foil attachment surface of the press roller, and provides an adhesive to the current collection foil attached to the press roller.

## Claims

### Claim 1

A manufacturing method for manufacturing an all-solid-state battery in which a current collection foil and an active material layer are stacked, the manufacturing method comprising:
a current collection foil attachment step of attaching the current collection foil to a foil attachment surface of a press roller that includes the foil attachment surface, which is a cylindrical surface, and that is configured to rotate using a central axis of the cylindrical surface as a rotational axis, wherein the press roller includes a plurality of ventilation holes that extend from the foil attachment surface to an interior, and the current collection foil is attached to the foil attachment surface due to a gas being suctioned from the ventilation holes to the interior;
an adhesive provision step of providing an adhesive on the current collection foil attached to the foil attachment surface; and
a pressing step of rotating and moving the current collection foil attached to the foil attachment surface to a surface of the active material layer being transported by a transport apparatus by rotating the press roller, and pressing the current collection foil and the active material layer in a thickness direction between the press roller and the transport apparatus.

### Claim 2 (depends on 1)

The manufacturing method according to claim 1, further comprising a thickness adjustment step of adjusting a thickness of the adhesive by bringing an adhesive contact surface of an adhesive roller that has the adhesive contact surface, which is a cylindrical surface, and that is configured to rotate using an axis parallel to the rotational axis of the press roller as a rotational axis into contact with the adhesive on the current collection foil attached to the foil attachment surface.

### Claim 3 (depends on 2)

The manufacturing method according to claim 2, wherein the adhesive provision step and the thickness adjustment step are performed at the same time by transferring the adhesive supplied to the adhesive contact surface of the adhesive roller to the current collection foil attached to the foil attachment surface.

### Claim 4 (depends on 1)

The manufacturing method according to claim 1,
wherein the adhesive is a photocurable adhesive that is cured due to a curing light being emitted thereto, and
the manufacturing method further comprises a curing light emission step of emitting the curing light to the adhesive.

### Claim 5 (depends on 1)

The manufacturing method according to claim 1, wherein a viscosity of the adhesive when provided to the current collection foil in the adhesive provision step is 100 mPa·s to 5000 mPa·s.

### Claim 6 (depends on 1)

The manufacturing method according to claim 1,
wherein a surface of the current collection foil to which the adhesive is to be provided is coated with carbon, and
a viscosity of the adhesive when provided to the current collection foil in the adhesive provision step is 500 mPa·s to 1500 mPa·s.