Manufacturing method of all-solid battery

Patent metadata

Field	Value
Publication number	US-9564655-B2
Application number	US-201414557711-A
Country	US
Kind code	B2
Filing date	Dec 2, 2014
Priority date	Dec 19, 2013
Publication date	Feb 7, 2017
Grant date	Feb 7, 2017

Abstract

A manufacturing method of an all-solid battery includes fabricating a single battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer arranged between the positive electrode layer and the negative electrode layer; fabricating a plurality of battery packs including the plurality of single batteries; confining a plurality of battery packs by an equal confining pressure; measuring the electrical characteristics of the plurality of confined battery packs; determining the battery pack whose measured electrical characteristics are the worst of the plurality of battery packs; reducing the confining pressures of the other battery packs so that the electrical characteristics of the other battery packs are equal to that of the battery pack whose electrical characteristics have been determined to be the worst; and electrically connecting in parallel the battery packs.

First claim

What is claimed is:

1. A manufacturing method of an all-solid battery, the method comprising:
fabricating a single battery including a positive electrode layer, a negative electrode layer, and a solid electrolyte layer arranged between the positive electrode layer and the negative electrode layer;
fabricating a plurality of battery packs including the plurality of single batteries;
confining a plurality of battery packs by an equal confining pressure;
measuring the electrical characteristics of the plurality of confined battery packs;
determining the battery pack whose measured electrical characteristics are the worst of the plurality of battery packs;
reducing the confining pressures of the other battery packs so that the electrical characteristics of the other battery packs are equal to the electrical characteristics of the battery pack whose electrical characteristics have been determined to be the worst; and
electrically connecting in parallel the other battery packs whose confining pressure has been reduced and the battery pack whose electrical characteristics have been determined to be the worst.

2. The manufacturing method of an all-solid battery according to claim 1 , further comprising:
measuring the electrical characteristics of a plurality of single batteries, respectively;
classifying the plurality of single batteries into a plurality of groups according to the magnitudes of the measured electrical characteristics; and
forming a battery pack for each classified group.

3. The manufacturing method of an all-solid battery according to claim 2 , wherein
the reducing the confining pressures of the other battery packs includes selecting a confining jig in accordance with the reduced confining pressure.

4. The manufacturing method of an all-solid battery according to claim 3 , further comprising:
aging a plurality of battery packs whose confining pressure has been reduced;
measuring the electrical characteristics of the plurality of aged battery packs, respectively; and
readjusting the confining pressures that confine the plurality of battery packs so that the electrical characteristics of the plurality of battery packs are equal, wherein
the readjusting the confining pressures that confine the plurality of battery packs includes exchanging the confining jig with another in accordance with the readjusted confining pressure.

5. The manufacturing method of an all-solid battery according to claim 1 , wherein
the reducing the confining pressures of the other battery packs includes selecting a confining jig in accordance with the reduced confining pressure.

6. The manufacturing method of an all-solid battery according to claim 5 , further comprising:
aging a plurality of battery packs whose confining pressure has been reduced;
measuring the electrical characteristics of the plurality of aged battery packs, respectively; and
readjusting the confining pressures that confine the plurality of battery packs so that the electrical characteristics of the plurality of battery packs are equal, wherein
the readjusting the confining pressures that confine the plurality of battery packs includes exchanging the confining jig with another in accordance with the readjusted confining pressure.

7. The manufacturing method of an all-solid battery according to claim 1 , wherein
the confining the plurality of battery packs by the equal confining pressure includes confining the plurality of battery packs by a maximum confining pressure of the confining jig that confines the plurality of battery packs.

8. The manufacturing method of an all-solid battery according to claim 1 , wherein
the electrical characteristics that are measured are output.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hasegawa Hajime
• Ose Norihiro
• Sasaoka Tomoharu
• Kato Kazuhito
• Haga Kengo
• Kosaka Daichi

Classifications

• H01M10/48

  Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569) · CPC title

• H01M50/50

  Current conducting connections for cells or batteries · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M10/052

  Li-accumulators · CPC title

• Y10T29/49108

  Electric battery cell making · CPC title