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Method and equipment for manufacturing electrode sheet

A technology of manufacturing device and manufacturing method, which is applied in the field of electrode sheet manufacturing and manufacturing device, can solve the problems of difficult penetration of active substances, large size of the device, etc., and achieve the effect of easy penetration

Inactive Publication Date: 2015-01-21
MITSUBISHI MATERIALS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the manufacturing device described in Patent Document 1, the active material is suspended in the structural part of the porous current collector, and it is difficult to efficiently permeate the active material into the inside of the current collector.
[0008] In addition, in the production method described in Patent Document 2, there is a concern that the device will become large in size when an electromagnetic force generating device and the like are installed.

Method used

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  • Method and equipment for manufacturing electrode sheet
  • Method and equipment for manufacturing electrode sheet
  • Method and equipment for manufacturing electrode sheet

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0043] (1) Overall structure

[0044] figure 1 The electrode sheet manufacturing apparatus 1 according to the first embodiment shown includes: a supply roll 12 around which a strip-shaped porous body 10 is wound; a press plate 14 for pressing the porous body 10 against the supply roll 12; The rear roller 16 and the stretching roller 18 of the moving roller that the porous body 10 supplied by the supply roller 12 moves, and the coating part 22 that applies the filler 20 to one surface of the porous body 10 (hereinafter referred to as the surface) , and a drying furnace 24 for drying the porous body 10 coated with the filler 20 . In addition, although the electrode sheet manufacturing apparatus 1 of this embodiment is an apparatus which manufactures the electrode sheet used for a lithium ion secondary battery, it is not limited to use in a lithium ion secondary battery in particular.

[0045] The porous body 10 has a three-dimensional network structure constituting a current c...

no. 2 approach

[0063] next, yes figure 2 The electrode sheet manufacturing apparatus 2 according to the second embodiment of the present invention shown will be described. In addition, in this embodiment, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and description is abbreviate|omitted.

[0064] (1) Overall structure

[0065] The electrode sheet manufacturing apparatus 2 of the present embodiment is mainly different from the above-mentioned first embodiment in that the coating unit is configured to apply the filler 20 using the comma coating method (comma coater method). That is, in this embodiment, the supply roll 12, the platen 14, the back roll 16, the stretching roll 18, the coating part 38, the drying oven 24, and the vibration application part 34 are provided.

[0066] The coating section 38 applies the filler 20 by a comma coating method. The coating unit 38 has a knife roll 44 formed on an upper portion of the rear roll 16 provided on the b...

no. 3 approach

[0074] next, yes image 3 The electrode sheet manufacturing apparatus 3 according to the third embodiment of the present invention shown will be described. In addition, in this embodiment, the same code|symbol is attached|subjected to the same structure as 2nd Embodiment, and description is abbreviate|omitted.

[0075] (1) Overall structure

[0076] The electrode sheet manufacturing apparatus 3 of the present embodiment differs from the above-described second embodiment in that the vibration imparting unit 48 is attached to the base 40 that rotatably supports the rear roller 16 and the knife roller 44 .

[0077] The vibration imparting unit 48 of the present embodiment imparts vibration of a desired frequency to the base 40 . Specifically, the vibration imparting unit 48 is provided between the base 40 and a floor (not shown), and imparts vibration to the base 40 itself. Thereby, the rear roller 16 and the knife roller 44 supported by the base 40 vibrate. The vibration imp...

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Abstract

The invention provides a method and equipment for manufacturing an electrode sheet, which allows fine particles in a filling agent to penetrate into the deep interior of a porous body when the filling agent is applied onto the porous body. In order to coating the back surface of the porous body (10) with the filling agent having active matters, the equipment (1) for manufacturing the electrode sheet comprises a vibration applying part (34) which applies vibration of a certain frequency to the porous body (10) during the process that the filling agent (20) is coated onto the porous body (10). The vibration applying part (34) comprises a vibration arousing roller (36) configured to be in contact with the back surface of the porous body (10). The vibration arousing roller (36) applies vibration to the active matters of the filling agent (20) through the porous body (10).

Description

technical field [0001] The present invention relates to a method and apparatus for manufacturing an electrode sheet in which a filler containing an active material is applied to a porous body. Background technique [0002] A lithium ion secondary battery requires a large capacity. Due to such demands, the development of a metal current collector with a three-dimensional network structure capable of holding more active materials per unit area is under consideration. In this current collector with a three-dimensional network structure, it is an important issue to efficiently fill the active material. [0003] As a device for filling a porous body with a three-dimensional network structure with a filler, a manufacturing device has been proposed in which an electrical or mechanical vibrator is installed near the outlet of the filler supply container to vibrate the outlet portion (for example, Patent Document 1). manufacturing device. In this manufacturing apparatus, the visco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/80H01M4/04H01M4/139
CPCH01M4/80Y02E60/10H01M4/0416
Inventor 秋草顺木津贤一矶部毅和田正弘
Owner MITSUBISHI MATERIALS CORP
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