Solid-state battery cell

Patent metadata

Field	Value
Publication number	US-2021296739-A1
Application number	US-202117199414-A
Country	US
Kind code	A1
Filing date	Mar 11, 2021
Priority date	Mar 19, 2020
Publication date	Sep 23, 2021
Grant date	—

Abstract

A solid-state battery cell that can enable high output and in which cell terminals can be freely arranged is provided. A solid-state battery cell 100 has a plurality of unit solid-state batteries 10 that each have a negative electrode plate 101, a positive electrode plate 102, and a solid electrolyte layer 103, and a negative electrode collector plate 106 and positive electrode collector plate 107 that are electrically connected to cell terminals, wherein the negative electrode plate 101 and the positive electrode plate 102 each have a plurality of electrodes, the positive electrode collector plate 107 and the negative electrode collector plate 106 are respectively electrically connected to the pluralities of electrodes, and a plurality of the unit solid-state batteries 10 is electrically connected in series by the pluralities of electrodes and housed in a single cell.

First claim

What is claimed is:

1 . A solid-state battery cell, comprising:
a plurality of unit solid-state batteries each having a negative electrode plate, a positive electrode plate, and a solid electrolyte layer; and a negative electrode collector plate and a positive electrode collector plate that are each electrically connected to a respective cell terminal, wherein each negative electrode plate and each positive electrode plate has a plurality of electrodes, the negative electrode collector plate and the positive electrode collector plate are respectively electrically connected to the pluralities of electrodes, and the plurality of unit solid-state batteries are electrically connected in series by the pluralities of electrodes and are housed in a single cell.

2 . The solid-state battery cell according to claim 1 , wherein the negative electrode collector plate and the positive electrode collector plate are arranged at respective ends of the plurality of unit solid-state batteries in a lamination direction.

3 . The solid-state battery cell according to claim 2 , wherein the negative electrode collector plate and the positive electrode collector plate each have the respective cell terminal, which protrudes externally from a respective end surface of the plurality of unit solid-state batteries in the lamination direction.

4 . The solid-state battery cell according to claim 1 , wherein the negative electrode collector plate and the positive electrode collector plate are arranged between the plurality of unit solid-state batteries.

5 . The solid-state battery cell according to claim 1 , wherein each unit solid-state battery is a laminated electrode group in which a plurality of the negative electrode plates, a plurality of the positive electrode plates, and a plurality of the solid electrolyte layers are electrically connected in parallel.

6 . The solid-state battery cell according to claim 5 , wherein each laminated electrode group has an even number of the solid electrolyte layers, and
is formed by combining one laminated electrode group, which is arranged adjacent to the negative electrode collector plate and in which one negative electrode plate is arranged as an outermost layer, and another laminated electrode group, which is arranged adjacent to the positive electrode collector plate and in which one positive electrode plate is arranged as an outermost layer.

7 . The solid-state battery ceil according to claim 5 , wherein each laminated electrode group has an odd number of the solid electrolyte layers, and
at least one of the condition that electrode plates arranged at respective ends of the solid-state battery cell in a lamination direction of the solid-state battery cell have the same potential difference and the condition that adjacent electrode plates from the plurality of laminated electrode groups have the same potential difference is satisfied.

Assignees

• Honda Motor Co Ltd

Inventors

• Akutsu Shigemitsu
• Fujimoto Shinji
• Sukigara Toru
• Aoyagi Shintaro

Classifications

• H01M50/54

  Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges · CPC title

• H01M10/056 Primary

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• H01M10/0525

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

• H01M10/0583 Primary

  of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators · CPC title

• H01M50/51 Primary

  Connection only in series · CPC title