Manufacturing method of laminated electrode body

Patent metadata

Field	Value
Publication number	US-9812697-B2
Application number	US-201615258390-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Sep 7, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A positive-electrode belt-shaped sheet is cut while the positive-electrode belt-shaped sheet and a negative-electrode belt-shaped sheet are continuously sent, a cut positive-electrode sheet laminated on the uncut negative-electrode belt-shaped sheet via a separator layer is sent and clamped, the uncut negative-electrode belt-shaped sheet is cut at a cutting gap between the positive-electrode sheets laminated thereon, so as to form a sheet unit including the positive-electrode sheet and the negative-electrode sheet, a lamination shape of the sheet unit is measured so as to determine good or bad of the lamination shape, the sheet unit is classified based on a good/bad determination result, and the sheet units determined as good products is collectively laminated and pressed so as to obtain a laminated electrode body. Here, the positive-electrode belt-shaped sheet is cut while the positive-electrode belt-shaped sheet is clamped.

First claim

What is claimed is:

1. A manufacturing method of a laminated electrode body, comprising:
forming a separator layer on an electrode surface of at least one of a positive-electrode belt-shaped sheet and a negative-electrode belt-shaped sheet;
cutting either one of the positive-electrode belt-shaped sheet and the negative-electrode belt-shaped sheet so as to form a positive-electrode sheet or a negative-electrode sheet while continuously sending the either one of the positive-electrode belt-shaped sheet and the negative-electrode belt-shaped sheet by a feed roller;
clamping and sending, by a clamp roller, the formed positive-electrode sheet or the formed negative-electrode sheet laminated, via the separator layer, on the other one of the negative-electrode belt-shaped sheet and the positive-electrode belt-shaped sheet, the other one of the negative-electrode belt-shaped sheet and the positive-electrode belt-shaped sheet being uncut;
cutting the other one of the negative-electrode belt-shaped sheet and the positive-electrode belt-shaped sheet at a cutting gap formed between adjacent positive-electrode sheets or negative-electrode sheets laminated on the other one of the negative-electrode belt-shaped sheet and the positive-electrode belt-shaped sheet, so as to obtain a sheet unit including the positive-electrode sheet and the negative-electrode sheet;
measuring a lamination shape of the sheet unit so as to determine good or bad of the lamination shape;
classifying the sheet unit into a good product when it is determined that the lamination shape of the sheet unit is good and classifying the sheet unit into a defective product when it is determined that the lamination shape of the sheet unit is bad; and
laminating and pressing a plurality of sheet units determined as the good product, so as to obtain a laminated electrode body,
wherein the either one of the positive-electrode belt-shaped sheet and the negative-electrode belt-shaped sheet is cut while the either one of the positive-electrode belt-shaped sheet and the negative-electrode belt-shaped sheet is clamped.

2. The manufacturing method according to claim 1 , wherein
the either one of the positive-electrode belt-shaped sheet and the negative-electrode belt-shaped sheet is cut by a cutting blade provided in the feed roller; and
when a first feed speed by the feed roller is indicated by V 1 and a second feed speed by the clamp roller is indicated by V 2 , V 1 and V 2 satisfy a relationship represented by the following Formula (1) as follows
1< V 2/ V 1≦1.25  (1).

3. The manufacturing method according to claim 2 , wherein
the clamp roller includes first and second rollers making contact with each other;
a cut portion axially extending is formed on an outer periphery of the first roller; and
when the clamp roller is rotated, the clamp roller temporarily causes an unclamped state by the cut portion of the first roller, so as to absorb a speed difference between the first feed speed and the second feed speed.

Assignees

• Toyota Motor Co Ltd

Inventors

• Koike Masaki

Classifications

• H01M50/406

  Moulding; Embossing; Cutting · CPC title

• B32B37/0053

  Constructional details of laminating machines comprising rollers; Constructional features of the rollers · CPC title

• B32B38/0004 Primary

  Cutting, tearing or severing, e.g. bursting; Cutter details (cutting in general B26D; laminating combined with punching or perforating B32B38/04; removing all or part of the layers B32B38/10; cutting in combination with laying up and registration B32B38/185 takes precedence) · CPC title

• B32B37/02

  characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations · CPC title

• H01M2004/028

  Positive electrodes · CPC title