All solid-state battery, resin applicator, and method for producing all solid-state battery

Patent metadata

Field	Value
Publication number	US-11217825-B2
Application number	US-201916438793-A
Country	US
Kind code	B2
Filing date	Jun 12, 2019
Priority date	Jun 26, 2018
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A solid-state battery includes a third active material layer, a first solid electrolyte layer, a first active material layer, a first current collector layer, a second active material layer, a second solid electrolyte layer and a fourth active material layer in the order mentioned, wherein both the first and second active layers are anode or cathode active material layers. When both the first and second active layers are anode layers, both the third and fourth active layers are cathode layers. When both the first and second active layers are cathode layers, both the third and fourth active layers are anode layers, at least the first current collector layer extends to an outer side than the third and fourth active layers, and an insulating resin layer continuously across a surface of the extending part on one side, a side face and a surface of the extending part on the other side.

First claim

What is claimed is:

1. An all solid-state battery comprising:
a first current collector layer;
a first active material layer that is layered onto a surface of the first current collector layer on one side;
a second active material layer that is layered onto a surface of the first current collector layer on another side;
a first solid electrolyte layer that is layered onto a surface of the first active material layer on the one side;
a second solid electrolyte layer that is layered onto a surface of the second active material layer on the other side;
a third active material layer that is layered onto a surface of the first solid electrolyte layer on the one side;
a fourth active material layer that is layered onto a surface of the second solid electrolyte layer on the other side;
a second current collector layer that is layered onto a surface of the third active material layer on the one side; and
a third current collector layer that is layered onto a surface of the fourth active material layer on the other side,
wherein both the first and second active material layers are anode active material layers or cathode active material layers, and in a case where both the first and second active material layers are anode active material layers, both the third and fourth active material layers are cathode active material layers and in a case where both the first and second active material layers are cathode active material layers, both the third and fourth active material layers are anode active material layers,
at least the first current collector layer extends farther to an outer side than the third and fourth active material layers, to constitute an extending part,
an insulating resin layer is continuously provided across a surface of the extending part on the one side, a side face of the extending part, and a surface of the extending part on the other side, and
the insulating resin layer is provided for side faces of the first active material layer, the second active material layer, the first solid electrolyte layer and the second solid electrolyte layer, and the insulating resin layer has a cross section that is substantially C-shaped.

2. The all solid-state battery according to claim 1 , wherein
a surface of the insulating resin layer on the one side is present closer to the other side than the surface of the third active material layer on the one side is, and
a surface of the insulating resin layer on the other side is present closer to the one side than the surface of the fourth active material layer on the other side is.

3. The all solid-state battery according to claim 1 , wherein the insulating resin layer is present between the second and third current collector layers.

4. The all solid-state battery according to claim 1 , wherein
at least the first current collector layer, the first active material layer and the second active material layer extend farther to an outer side than the third and fourth active material layers, to constitute the extending part.

5. The all solid-state battery according to claim 1 , wherein
the first current collector layer, the first active material layer, the second active material layer, the first solid electrolyte layer and the second solid electrolyte layer extend farther to an outer side than the third and fourth active material layers, to constitute the extending part.

6. The all solid-state battery according to claim 5 , wherein
the insulating resin layer is continuously provided across the surface of the first solid electrolyte layer on the one side, the side face of the extending part, and the surface of the second solid electrolyte layer on the other side.

7. A method for producing the all solid-state battery of claim 1 , the method comprising:
layering a first active material layer onto a surface of a first current collector layer on one side;
layering a second active material layer onto a surface of the first current collector layer on another side;
layering a first solid electrolyte layer onto a surface of the first active material layer on the one side;
layering a second solid electrolyte layer onto a surface of the second active material layer on the other side;
layering a third active material layer onto a surface of the first solid electrolyte layer on the one side;
layering a fourth active material layer onto a surface of the second solid electrolyte layer on the other side;
making both the first and second active material layers anode active material layers or cathode active material layers, and in a case where both the first and second active material layers are anode active material layers, making both the third and fourth active material layers cathode active material layers and in a case where both the first and second active material layers are cathode active material layers, making both the third and fourth active material layers anode active material layers;
extending at least the first and second active material layers farther to an outer side than the third and fourth active material layers, to constitute an extending part;
continuously providing ultraviolet cure resin across a surface of the extending part on the one side, a side face of the extending part, and a surface of the extending part on the other side by transfer;
irradiating the ultraviolet cure resin, which is transferred to the extending part, with an ultraviolet ray, and curing the ultraviolet cure resin to form an insulating resin layer; and
layering a second current collector layer onto a surface of the third active material layer on the one side and layering a third current collector layer onto a surface of the fourth active material layer on the other side after providing the insulating resin layer for the extending part.

Assignees

• Toyota Motor Co Ltd

Inventors

• Itoh Yuichi
• Narita Yuto
• Kato Kazuhito
• Fujiwara Hiroshi

Classifications

• B29C2035/0827

  using UV radiation · CPC title

• H01M10/0585 Primary

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

• B05C1/0808

  Details thereof, e.g. surface characteristics · CPC title

• H01M4/668

  Composites of electroconductive material and synthetic resins · CPC title

• B05C5/004

  the work consisting of separate rectangular flat articles, e.g. flat sheets · CPC title