Electrode mixture paste applying method and device

A coating method and a coating device technology, which are applied to the surface coating liquid device, electrode collector coating, electrode manufacturing, etc., can solve the problem of inability to perform continuous welding, long welding time, and obstruction of roller electrode rotation And other issues

Inactive Publication Date: 2008-04-30
PANASONIC CORP
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case of performing spot welding point by point as in Patent Document 1, although the influence of heat propagation can be ignored, in the case of seam welding, the heat generation becomes significant due to the long welding time.
When the amount of heat generation exceeds a certain level, the diameter of the above-mentioned roller pin becomes larger due to thermal expansion, so that it becomes the same as the hole diameter of the roller electrode, and the friction force increases, thereby hindering the rotation of the roller electrode, so there is a The problem is that it becomes impossible to perform continuous welding, resulting in a decrease in productivity

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrode mixture paste applying method and device
  • Electrode mixture paste applying method and device
  • Electrode mixture paste applying method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In water with a wet ball mill, the composition formula MmNi 3.55 co 0.75 mn 0.4 Al 0.3 The shown hydrogen storage alloy was pulverized to an average particle diameter of 30 µm to obtain a hydrogen storage alloy powder. After immersing the hydrogen storage alloy powder in an alkaline aqueous solution for surface treatment, 10 kg of a carboxymethyl cellulose aqueous solution having a solid content ratio of 1.5% and 0.4 kg of Ketjen black were added to 100 kg of the hydrogen storage alloy powder. After kneading, 1.75 kg of an aqueous solution of styrene-butadiene copolymer rubber particles having a solid content ratio of 40% was added and stirred to prepare electrode mixture slurry 5 .

[0024] On both sides of the core material 2 (the total length of one coil is 200m) consisting of a nickel-plated iron punching metal with a thickness of 60 μm, a width of 300 mm, a punching diameter of 1 mm, and an opening ratio of 42%. , while scraping 20 mm of the electrode mixture s...

Embodiment 2

[0028] With respect to Example 1, except that the roll electrode 91, the roll pin 92, the roll holder 94, and the plate electrode 97 were made of tungsten, it carried out similarly to Example 1, and produced the slurry coating sheet 6.

[0029]In the four times of seam welding, the problem that the roller electrode 91 did not rotate did not occur. In addition, after coating over 1000 m, the distance from one end of the core material 2 to the coated part of the electrode mixture slurry 5 was measured on the rearmost part (the part where the coating was completed) of the slurry coated sheet 6. Size, the result is relative to the initial set value of 20mm, its offset is 0.6mm.

Embodiment 3

[0031] With respect to Example 1, except that the welding current and the action of gas injection are linked by a sequencer, and air (compressed air) is injected from the gas injection port 93 only when the switch 96 is pressed, the same method as in Example 1 is produced. Slurry coated sheet 6.

[0032] In the four times of seam welding, the problem that the roller electrode 91 did not rotate did not occur. In addition, after coating over 1000 m, the distance from one end of the core material 2 to the coated part of the electrode mixture slurry 5 was measured on the rearmost part (the part where the coating was completed) of the slurry coated sheet 6. Size, the result is relative to the initial set value of 20mm, its offset is 0.05mm.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A stabilized electrode mixture paste applying method comprising the first step of paying out a core material (2) wound in a coil shape, the second step of immersing the core material into electrode mixture paste (5), the third step of regulating the coating amount of electrode mixture paste, the fourth step of drying a paste-coated sheet (6) coated at opposite surface with electrode mixture paste, and the fifth step of taking up the paste-coated sheet into a coil shape, wherein a seam welding step for joining the coils of the core material is provided between the first step and the second step, and this seam welding step uses as a welding electrode (91) metal containing molybdenum and / or tungsten and is provided with an air-cooling mechanism by means of compressed gas, whereby a potential trouble such as micro short-circuiting is eliminated and a trouble in a core material welding step can be avoided.

Description

technical field [0001] The present invention relates to a method and a device for coating an electrode mixture slurry on a core material made of perforated metal sheets, and more specifically, to a welding method between the core materials. Background technique [0002] Batteries such as alkaline storage batteries and lithium ion secondary batteries are widely used as power sources for portable devices, electric tools, or electric vehicles. Among them, nickel-metal hydride storage batteries with high energy density and excellent durability are mainly used as power supplies for electric vehicles, and their applications are expanding. [0003] Generally speaking, the main components of a nickel-metal hydride storage battery include: a positive electrode formed by filling a three-dimensional metal porous body with nickel hydroxide, etc.; The negative electrode is made of electrode mixture slurry composed of hydrogen storage alloy and the like. Among them, the negative electro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/04B05C3/12B05C3/132B05C9/14B05D1/18B23K9/025B23K9/16H01M4/26H01M4/139H01M4/24H01M4/74
CPCY02E60/124B05C9/04Y02E60/122H01M4/26B23K11/061B05D1/18B05D2252/02H01M4/139H01M4/0404Y02E60/10
Inventor 加藤正彦柳沼裕典南野圭史
Owner PANASONIC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap