Method for Producing Mono-Cell

• US 20200136190A1
• Filed: 02/27/2017
• Published: 04/30/2020
• Est. Priority Date: 02/27/2017
• Status: Abandoned Application

• Current Assignee: Envision AESC Japan Co., Ltd.
• Original Assignee: Envision AESC Japan Co., Ltd.
• Inventors: YAMASHITA, Takeshi, SATOU, Takanori, SHIRAI, Kenichi, NAGASHIMA, Tomio, MASUDA, Asuna
• Application Number:
  US16/486,405
• Publication Number:
  US 20200136190A1
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/0404 Machines for assembling batteries
• CPC Class Codes: H01M 10/0413 Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 50/417 Polyolefins
• CPC Class Codes: H01M 50/434 Ceramics
• CPC Class Codes: H01M 50/451 comprising layers of only organic material and layers containing inorganic material
• CPC Class Codes: H01M 50/461 with adhesive layers between electrodes and separators
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

A mono-cell is formed of a separator, a positive electrode, a separator and a negative electrode bonded to one another. Each separator includes a ceramic layer facing the positive electrode. On a lower surface and an upper surface of the positive electrode, an adhesive is applied at points lined up on a straight line along a width direction orthogonal to a conveyance direction. When an application length is defined as the product of the number of application points of the adhesive lined up in the width direction and the application diameter of each adhesive, the number of application points and the application diameter are set such that a value obtained by dividing, by the application length, a force applied to each ceramic layer based on acceleration and the weight of the separator during suction and conveyance becomes smaller than the necessary peeling strength per unit length of the ceramic layer.

Claims

1. A method for producing a mono-cell, comprising:

bonding a sheet-like positive electrode and a sheet-like negative electrode, in each of which an adhesive has been applied to a plurality of points separated from each other in a width direction orthogonal to a mono-cell conveyance direction, to respective both surfaces of a separator equipped with, on at least one of the surfaces thereof, a heat resistant layer; and

carrying out, after the bonding, conveyance of the mono-cell along the mono-cell conveyance direction in a posture in which one of the positive electrode and the negative electrode is sucked, and the other is positioned at a lower part,

wherein an application length is defined as a product of the number of application points of the adhesive in the width direction and an application diameter of each adhesive, a force applied to the heat resistant layer is determined based on an acceleration and a weight including the other of the positive electrode and the negative electrode during the suction and conveyance, and the number of the application points and the application diameter are set such that a linear pressure obtained by dividing the force by the application length becomes smaller than a necessary peeling strength per unit length of the heat resistant layer.

2. The method for producing the mono-cell according to claim 1, wherein the positive electrode is disposed between a pair of separators.

3. The method for producing the mono-cell according to claim 1, wherein each of the separators is provided with the heat resistant layer on a surface facing the positive electrode.