Manufacturing method of electrode body and electrode body

Patent metadata

Field	Value
Publication number	US-10916801-B2
Application number	US-201715665638-A
Country	US
Kind code	B2
Filing date	Aug 1, 2017
Priority date	Aug 9, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

A method of manufacturing an electrode body includes a charging step, a first laminating step, and a second laminating step to manufacture the electrode body by laminating positive and negative electrode plates by interposing a separator therebetween. In the charging step, one of the positive and negative electrode plates is a first electrode plate and an other one is a second electrode plate, and one of the first electrode plate and the separator is charged to a potential enough to generate an attraction force between the first electrode plate and the separator. The first laminating step includes bringing the first electrode plate and the separator, at least one of which is charged, into direct contact to attach each other to form a laminated body. In the second charging step, the second electrode plate is laminated on the laminated body to form the electrode body.

First claim

What is claimed is:

1. A manufacturing method of an electrode body formed by laminating a positive electrode plate and a negative electrode plate by interposing a separator therebetween, wherein
one of the positive electrode plate and the negative electrode plate is a first electrode plate and an other one is a second electrode plate, and
the manufacturing method includes:
a charging step of electrically charging at least the first electrode plate at an electric potential enough to generate an attraction force between the first electrode plate and the separator;
a first laminating step of bringing the first electrode plate and the separator, at least one of which is charged, into direct contact such that the first electrode plate and the separator are attached to each other to form a laminated body; and
a second laminating step of laminating the second electrode plate on the laminated body to form the electrode body, wherein

the charging step includes charging at least the first electrode plate such that a discharge voltage between the first electrode plate and the separator to be brought into contact in the first laminating step falls within a range from 1 kV to 20 kV inclusive, and
the first laminating step comprises passing a sheet, comprising the first electrode plate, and a sheet, comprising the separator, simultaneously through a pair of rollers such that the sheet comprising the separator comes into direct contact with and laminates the sheet comprising the first electrode plate.

2. The method of claim 1 , wherein the charging step includes charging at least the first electrode plate such that the discharge voltage between the first electrode plate and the separator to be brought into contact in the first laminating step falls within a range from 1 kV to 17 kV inclusive.

3. The method of claim 1 , wherein the charging step includes charging at least the first electrode plate such that the discharge voltage between the first electrode plate and the separator to be brought into contact in the first laminating step falls within a range from 1 kV to 15 kV inclusive.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hiramoto Natsumi
• Ochiai Akihiro

Classifications

• Y02P70/50

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

• B32B2037/1063

  using an electrostatic force · CPC title

• H01G11/84

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title

• B32B37/182 Primary

  one or more of the layers being plastic · CPC title

• B32B2457/10

  Batteries · CPC title