Stacked battery

Patent metadata

Field	Value
Publication number	US-10665850-B2
Application number	US-201815941116-A
Country	US
Kind code	B2
Filing date	Mar 30, 2018
Priority date	Apr 7, 2017
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

Disclosed is a stacked battery including at least one short-circuit current shunt part and electric elements, wherein: the shunt part includes first and second current collector layers, and an insulating layer provided between the first and second current collector layers, all of these layers being stacked; each power generation element includes a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer all of these layers being stacked; the first current collector layer is electrically connected to the cathode current collector layer and the second current collector layer to the anode current collector layer; the electric elements are electrically connected in parallel; and the shunt part next to the electric elements includes a PPTC layer between the first current collector layer and the insulating layer and/or between the second current collector layer and the insulating layer.

First claim

What is claimed is:

1. A stacked battery comprising:
at least one short-circuit current shunt part; and
a plurality of electric elements,
the short-circuit current shunt part and the electric elements being stacked,
wherein:
the short-circuit current shunt part comprises a first current collector layer, a second current collector layer, and an insulating layer provided between the first and second current collector layers, all of these layers being stacked;
each electric element comprises a cathode current collector layer, a cathode material layer, an electrolyte layer, an anode material layer, and an anode current collector layer, all of these layers being stacked;
the first current collector layer is electrically connected to the cathode current collector layer;
the second current collector layer is electrically connected to the anode current collector layer;
the electric elements are electrically connected to each other in parallel; and
the short-circuit current shunt part next to the electric elements comprises a polymer positive temperature coefficient (PPTC) layer between the first current collector layer and the insulating layer and/or between the second current collector layer and the insulating layer.

2. The stacked battery according to claim 1 , wherein
the short-circuit current shunt part comprises a first short-circuit current shunt part close to the electric elements, and a second short-circuit current shunt part located on a side of the first short-circuit current shunt part opposite to the electric elements;
the first short-circuit current shunt part includes the PPTC layer; and
the second short-circuit current shunt part includes no PPTC layer.

3. The stacked battery according to claim 1 , wherein
the cathode current collector layer, the cathode material layer, the electrolyte layer, the anode material layer, and the anode current collector layer in each electric element are stacked in a stacking direction,
the electric elements are stacked in the stacking direction,
the first current collector layer, the insulating layer, and the second current, collector layer in the short-circuit current shunt part are stacked in the stacking direction, and
the short-circuit current shunt part and the electric elements are stacked in the stacking direction.

4. The stacked battery according to claim 1 , wherein the short-circuit current shunt part is provided at least outside the electric elements.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hasegawa Hajime
• Matsushita Yuki
• Tateishi Mitsuru
• Ebisuzaki Hideyo
• Nishimura Hideaki
• Okuhata Yusuke
• Hama Shigenori
• Ose Norihiro

Classifications

• H01M10/0525

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

• H01M2200/103

  Fuse · CPC title

• H01M2220/20

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

• H01M2200/00

  Safety devices for primary or secondary batteries · CPC title

• H01M10/058 Primary

  Construction or manufacture · CPC title