All-solid-state secondary battery and method of producing the same

Patent metadata

Field	Value
Publication number	US-10651506-B2
Application number	US-201615738358-A
Country	US
Kind code	B2
Filing date	Apr 27, 2016
Priority date	Jun 23, 2015
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

The present invention provides an all-solid-state secondary battery and a method for producing the same that can prevent the collapse of a laminate due to a shearing force occurring in the peripheral portion of the laminate when the laminate is pressed, and the occurrence of an internal short circuit can be prevented. The all-solid-state secondary battery includes a laminate and a plate-shaped insulating member both arranged between the positive electrode collector and the negative electrode collector. The laminate includes a positive electrode layer, a solid electrolyte layer, and a negative electrode layer. The plate-shaped insulating member is arranged around the laminate and contacted at least with the solid electrolyte layer to electrically insulate the positive electrode layer from the negative electrode layer. In the insulating member, a contact inner edge portion contacted with the laminate is thicker than a plate-shaped portion on the outer side.

First claim

What is claimed is:

1. An all-solid-state secondary battery comprising:
a pair of collectors;
a laminate; and
a plate-shaped insulating member, the laminate and the insulating member being arranged between the pair of collectors, the laminate including a positive electrode layer, a solid electrolyte layer, and a negative electrode layer stacked together, the insulating member being arranged around the laminate and contacted at least with the solid electrolyte layer to electrically insulate the positive electrode layer and the negative electrode layer from each other,
wherein in the insulating member, a contact inner edge portion contacted with the laminate has a larger thickness than a plate-shaped portion positioned on an outer side, and
wherein the insulating member is arranged between the pair of collectors via a positive electrode-side adhesive layer and a negative electrode-side adhesive layer, and the adhesive layers are arranged distant from an inner end of the insulating member to provide a distortion absorbing region to each of the collectors.

Assignees

• Hitachi Shipbuilding Eng Co

Inventors

• Fukui Hideyuki
• RYOU Shiken
• Takano Yasushi

Classifications

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0562

  Solid materials · CPC title