# US 8,771,383 B2 · Battery manufacturing method, battery manufactured by such method, vehicle and electronic device

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- Number: US 8,771,383 B2
- Document ID: US8771383B2
- Status: Granted
- Kind: B2
- Application number: 13/155,020
- Filed: 2011-06-07
- Published: 2012-01-05
- Granted: 2014-07-08
- Earliest claimed: 2010-07-01
- Assignees: Dainippon Screen Mfg. Co., Ltd.
- Applicants: Masakazu Sanada; Takeshi Matsuda
- Inventors: Masakazu Sanada; Takeshi Matsuda
- Web page: https://patentgrep.com/patent/US8771383B2

## CPC

- H01M 6/188: {Processes of manufacture}
- H01M 4/0404: {by coating on electrode collectors}
- H01M 4/0407: {by coating on an electrolyte layer}
- H01M 4/0419: {involving spraying}
- H01M 4/0471: {involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis}
- H01M 6/40: Printed batteries {, e.g. thin film batteries}
- 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 10/052: Li-accumulators
- H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
- H01M 10/0565: Polymeric materials, e.g. gel-type or solid-type
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- Y10T 29/49108: Electric battery cell making
- Y10T 29/49115: including coating or impregnating
- Y10T 156/10: Methods of surface bonding and/or assembly therefor
- 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
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A negative-electrode active material layer having a line-and-space structure is formed by applying an application liquid containing a negative-electrode active material in stripes on a surface of a negative-electrode current collector using a nozzle-scan coating method and drying the application liquid (Steps S101, S102). Subsequently, by a spin coating method, an application liquid containing a solid electrolyte material is applied (Step S103) and heated at a temperature lower than a glass-transition temperature of the electrolyte material to be dried. Further, an application liquid containing a positive-electrode active material is applied (Step S105) and a positive-electrode current collector is laminated (Step S106) and, then, a laminated body is heated to or above the glass-transition temperature of the electrolyte material to cause the solid electrolyte to flow and adhere to the active material layers.

## Claims

### Claim 1

A battery manufacturing method, comprising:
a first active material layer forming step of forming a first active material layer on a surface of a base material by applying a first application liquid containing a first active material on the surface of the base material, the first active material layer having unevenness on a surface opposite to a surface in contact with the base material, by discharging the first application liquid from a nozzle relatively moving with respect to the base material, to form a stripe-shaped pattern having a plurality of lines of the first active material;
an electrolyte layer forming step of forming a solid electrolyte layer by applying a second application liquid which contains a solid electrolyte material on the surface of the first active material layer, and heating the second application liquid to a temperature lower than a glass-transition temperature of the solid electrolyte material for increasing viscosity of the second application liquid after the second application liquid is applied,
the electrolyte layer having unevenness in conformity with unevenness of the first active material layer on a surface opposite to a surface in contact with the first active material layer, and the thickness of the solid electrolyte layer being made smaller than a height of the unevenness on the surface of the first active material layer;
a second active material layer forming step of forming a second active material layer by applying a third application liquid containing a second active material on the surface of the solid electrolyte layer; and
a heating step of heating the solid electrolyte layer to a temperature equal to or higher than the glass-transition temperature of the solid electrolyte material to reduce the viscosity of the solid electrolyte layer and to increase fluidity of the solid electrolyte layer so that the solid electrolyte material fills up clearance between the first active material layer and the second active material layer after the second active material layer forming step.

### Claim 2 (depends on 1)

The battery manufacturing method according to claim 1, wherein,
in the second active material layer forming step, the third application liquid is applied such that a surface opposite to the one in contact with the solid electrolyte layer becomes flat; and
further comprising:
a laminating step of laminating a conductive film, which will become a current collector, on the surface of the third application liquid in a state where the third application liquid is not yet cured.

### Claim 3 (depends on 1)

The battery manufacturing method according to claim 1, wherein said plurality of lines of the first active material are arranged extending in a same direction and at regular intervals from each other.