Battery, battery manufacturing method, and battery manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-2017309946-A1
Application number	US-201715482840-A
Country	US
Kind code	A1
Filing date	Apr 10, 2017
Priority date	Apr 25, 2016
Publication date	Oct 26, 2017
Grant date	—

Abstract

A battery is provided which includes a first power generating element, a second power generating element, and a first adhesion layer adhering the first power generating element to the second power generating element. A first positive electrode collector of the first power generating element and a second negative electrode collector of the second power generating element face each other with (i.e., via) the first adhesion layer. Between the first positive electrode collector and the second negative electrode collector, the first adhesion layer is disposed in a region forming a first positive electrode active material layer or a region forming a second negative electrode active material layer, whichever is smaller. The first positive electrode collector and the second negative electrode collector are not in contact with each other in a region in which the first positive electrode active material layer and the second negative electrode active material layer face each other.

First claim

What is claimed is:

1 . A battery comprising:
a first power generating element: a second power generating element laminated on the first power generating element; and a first adhesion layer adhering the first power generating element to the second power generating element, wherein the first power generating element includes a first positive electrode collector, a first negative electrode collector, a first positive electrode active material layer, a first negative electrode active material layer, and a first solid electrolyte layer, the first positive electrode active material layer and the first negative electrode active material layer are laminated to each other via the first solid electrolyte layer, the first positive electrode active material layer is disposed in a region smaller than the first positive electrode collector in contact with the first positive electrode collector, the first negative electrode active material layer is disposed in a region smaller than the first negative electrode collector in contact with the first negative electrode collector, the second power generating element includes a second positive electrode collector, a second negative electrode collector, a second positive electrode active material layer, a second negative electrode active material layer, and a second solid electrolyte layer, the second positive electrode active material layer and the second negative electrode active material layer are laminated to each other via the second solid electrolyte layer, the second positive electrode active material layer is disposed in a region smaller than the second positive electrode collector in contact with the second positive electrode collector, the second negative electrode active material layer is disposed in a region smaller than the second negative electrode collector in contact with the second negative electrode collector, the first positive electrode collector and the second negative electrode collector face each other via the first adhesion layer, the first adhesion layer is disposed in the region forming the first positive electrode active material layer or the region forming the second negative electrode active material layer, whichever is smaller, between the first positive electrode collector and the second negative electrode collector, and the first positive electrode collector and the second negative electrode collector are not in contact with each other in a region in which the first positive electrode active material layer and the second negative electrode active material layer face each other.

2 . The battery according to claim 1 ,
wherein the first adhesion layer is disposed in a region corresponding to 50% or more of the region forming the first positive electrode active material layer or the region forming the second negative electrode active material layer, whichever is smaller.

3 . The battery according to claim 1 ,
wherein the first adhesion layer is disposed in the entire region in which the first positive electrode active material layer and the second negative electrode active material layer face each other.

4 . The battery according to claim 1 , further comprising:
a first space holding body holding a space between the first power generating element and the second power generating element, wherein the first space holding body is disposed between the first positive electrode collector and the second negative electrode collector at a position at which the first adhesion layer is not disposed.

5 . The battery according to claim 4 ,
wherein the first space holding body is disposed with surrounding the periphery of the first adhesion layer.

6 . The battery according to claim 4 ,
wherein the first space holding body is in contact with the first positive electrode collector and the second negative electrode collector.

7 . The battery according to claim 1 , further comprising:
a third power generating element laminated on the first power generating element; and a second adhesion layer adhering the first power generating element to the third power generating element, wherein the third power generating element includes a third positive electrode collector, a third negative electrode collector, a third positive electrode active material layer, a third negative electrode active material layer, and a third solid electrolyte layer, the third positive electrode active material layer and the third negative electrode active material layer are laminated to each other via the third solid electrolyte layer, the third positive electrode active material layer is disposed in a region smaller than the third positive electrode collector in contact with the third positive electrode collector, the third negative electrode active material layer is disposed in a region smaller than the third negative electrode collector in contact with the third negative electrode collector, the first negative electrode collector and the third positive electrode collector face each other via the second adhesion layer, the second adhesion layer is disposed in the region forming the first negative electrode active material layer or the region forming the third positive electrode active material layer, whichever is smaller, between the first negative electrode collector and the third positive electrode collector, and the first negative electrode collector and the third positive electrode collector are not in contact with each other in a region in which the first negative electrode active material layer and the third positive electrode active material layer face each other.

8 . The battery according to claim 7 ,
wherein the second adhesion layer is disposed in a region corresponding to 50% or more of the region forming the first negative electrode active material layer or the region forming the third positive electrode active material layer, whichever is smaller.

9 . The battery according to claim 7 ,
wherein the second adhesion layer is disposed in the entire region in which the first negative electrode active material layer and the third positive electrode active material layer face each other.

10 . The battery according to claim 7 , further comprising:
a second space holding body holding a space between the first power generating element and the third power generating element, wherein the second space holding body is disposed between the first negative electrode collector and the third positive electrode collector at a position at which the second adhesion layer is not disposed.

11 . The battery according to claim 10 ,
wherein the second space holding body is disposed with surrounding the periphery of the second adhesion layer.

12 . The battery according to claim 10 ,
wherein the second space holding body is in contact with the first negative electrode collector and the third positive electrode collector.

13 . A battery manufacturing method using a battery manufacturing apparatus,
wherein the battery manufacturing apparatus includes a laminating unit and an adhesion layer forming unit, the method comprising steps of: (a) forming a first adhesion layer adhering a first power generating element to a second power generating element, by the adhesion layer forming unit; and (b) laminating the first power generating element and the second power generating element, by the laminating unit, wherein the first power generating element includes a first positive electrode collector, a first negative electrode collector, a first positive electrode active material layer, a first negative electrode active material layer, and a first solid electrolyte layer, the first positive elec

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Honda Kazuyoshi

Classifications

• B32B2311/12

  Copper · CPC title

• B32B2311/30

  Iron, e.g. steel · CPC title

• B32B15/00

  Layered products comprising {a layer of} metal · CPC title

• B32B37/12

  characterised by using adhesives · CPC title

• H01M10/0525

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