Unlock instant, AI-driven research and patent intelligence for your innovation.

Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole

A lithium battery and negative electrode technology, which is applied in the field of button lithium batteries, can solve the problems of not filling the bottom of the negative electrode cover, reducing the discharge reaction area of ​​the negative electrode lithium sheet, and reducing the discharge performance of the battery, so as to improve the capacity and service life. The effect of potential and discharge performance, product performance and quality stability

Inactive Publication Date: 2008-10-22
CHINA ENERGY LITHIUM
View PDF0 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Reduce battery discharge performance
In the second method, when the square lithium sheet is formed into a circular sheet under pressure, it often occurs that the bottom surface of the entire negative cover is not filled.
Therefore, the discharge reaction area of ​​the negative lithium sheet is reduced, which reduces the discharge performance of the battery.

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
  • Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole
  • Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole
  • Minus pole of coin type lithium battery, preparing method thereof and coin type lithium battery comprising the minus pole

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0035] Such as Figure 1-2 , The upper end surface of the negative electrode 3 is provided with a plurality of downwardly concave grooves 3-1. The difference from Example 1 is that the longitudinal section of the grooves is triangular in shape, and other technical features are the same.

Embodiment 3

[0037] Such as Figure 1-3 , The upper end surface of the negative electrode 3 is provided with a plurality of grooves 3-1 that are concave downwards. The difference from Embodiment 1 is that the longitudinal section of the grooves is zigzag, and other technical features are the same.

[0038] The shape of the longitudinal section of the groove can also be trapezoidal, corrugated, etc.

Embodiment 4

[0040] Such as diagram 2-1 As shown, the upper end surface of the negative electrode 3 is provided with a plurality of downward concave pits 3-2, the average depth of the pits is 0.05-0.3mm, and the average spacing is 0.1-0.3mm. The layout of the net pits can be in a dot matrix, such as Figure 2-2 As shown, it can also be in the shape of concentric circles or parallel lines or mesh. The shape of each mesh pit can be cylindrical, truncated cone, truncated prism or spherical segment.

[0041] The method for manufacturing the negative pole of the button-type lithium battery is to first cut the lithium strip into a square or circular piece, put it into the negative electrode cover, use a stamping die to stamp the square or circular lithium strip into a circular piece and cast the negative pole The bottom of the cover is characterized in that the stamping end surface of the stamping die is uneven, so that when the upper end surface of the negative electrode is formed, the upper...

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

PropertyMeasurementUnit
depthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a coin type lithium battery negative pole, which comprises a negative pole body provided with a lower end face connected with a negative cap of the coin type lithium battery and an upper end face connected with an insulating film of the coin type lithium batter, wherein the upper end face is uneven. The invention also discloses a method for processing the coin type lithium battery negative pole, which is to process uneven flutes or drop pits and bumps to press metallic lithium to be fully filled in a bottom surface of the negative cap and to be combined with the negative cap tightly so as to form an uneven negative upper end. The invention also discloses a coin type battery having the negative pole. The coin type battery of the invention allows a lithium negative pole material to discharge fully as the storage of electrolyte, the discharge area of the negative pole and the activity pf the negative pole are increased. Therefore, the initial electric potential and discharge performance of disposable lithium batteries is improved, and the capacity and life-span of the lithium batteries are increased.

Description

technical field [0001] The invention relates to a button-type lithium battery, in particular to a negative electrode of the button-type lithium battery, a processing method thereof, and a button-type lithium battery containing the negative electrode. Background technique [0002] At present, the surface of the lithium metal sheet of the negative electrode of the primary button lithium battery is flat. There are two methods of production and assembly. The first method is to manually punch lithium strips into lithium discs and manually put them into the negative cover of the welded negative current collector, and then press the lithium discs and negative current collectors together. . The second method is to mechanically cut the lithium strip into a square piece, put it into the negative electrode cover without the negative electrode current collecting net, and use die stamping and forging to make the lithium sheet form a disc and combine with the negative electrode cover. ...

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): H01M4/06H01M4/08H01M6/14
Inventor 陈强戴学贤牟瀚波贾振勇
Owner CHINA ENERGY LITHIUM
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com