Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for manufacturing cells of power lithium ion batteries

A technology of lithium-ion batteries and manufacturing methods, which is applied in the field of manufacturing power-type lithium-ion battery cells, can solve problems such as low internal resistance, and achieve the effects of high production efficiency, shortened migration distance, and good overlap

Inactive Publication Date: 2011-04-20
NANJING SHUANGDENG SCI TECH DEV RES INST
View PDF2 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of winding and stacking methods in the production of existing lithium battery cells, and provide a power type lithium ion battery with low internal resistance, large capacity, good consistency, and high production efficiency. Core making method

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
  • Method for manufacturing cells of power lithium ion batteries
  • Method for manufacturing cells of power lithium ion batteries
  • Method for manufacturing cells of power lithium ion batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Taking a 5Ah power type lithium manganese oxide battery as an example, under the condition that the formulation process of the mixing materials is completely consistent, the method of the present invention and the existing winding process and lamination process are respectively used to produce 10 batteries each. Wherein the present invention is specifically described as follows:

[0017] 1. The positive and negative active materials are respectively coated on one side of the positive and negative current collectors to form positive and negative pole rolls, and the surface density of the positive one side coated is 24g / cm 2 , the areal density of the negative electrode coated on one side is 8g / cm 2 , After the pole roll is rolled and cut, according to the width of the designed battery, the position of the reserved positive and negative tabs is determined, and the positive and negative pole pieces are punched out.

[0018] 2. The sides of the positive and negative pole p...

Embodiment 2

[0023] Taking an 8Ah high-power lithium iron phosphate battery as an example, under the condition that the formulation and process of the mixing materials are completely consistent, 10 batteries each are produced by the method of the present invention, the winding process and the stacking process. Wherein the present invention is specifically described as follows:

[0024] 1. The positive and negative active materials are respectively coated on one side of the positive and negative current collectors to form positive and negative pole rolls, and the surface density of the positive one side coating is 18g / cm 2 , the areal density of the negative electrode coated on one side is 9g / cm 2 , After the pole roll is rolled and cut, according to the width of the designed battery, the position of the reserved positive and negative tabs is determined, and the positive and negative pole pieces are punched out.

[0025] 2. The side of the positive and negative pole pieces covered with act...

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

The invention discloses a method for manufacturing cells of power lithium ion batteries. The method is characterized in that active substances of the cathode and anode are respectively coated on single surfaces of cathode and anode current collectors to form anode and cathode coils; the coils are rolled and split to prepare anode and cathode pieces; a plurality of tabs are reserved on the anode and cathode pieces; the surfaces of the anode and cathode pieces, which are coated with the active substances, are opposite and are separated by a diaphragm; the tabs respectively coincide after S-shaped folding; and finally gummed paper is used for fixing the four corners of the folded semi-finished batteries. The method has the advantages of good manufacturability and high production efficiency, and the cells manufactured by the method have high consistency and low internal resistance, therefore, the method is especially suitable for manufacturing the power lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a method for manufacturing a power type lithium-ion battery cell. Background technique [0002] Lithium-ion batteries consist of positive pole pieces, negative pole pieces, separators, electrolytes and casings. Lithium-ion battery electrode active materials are currently coated on both sides, and the highest precision of the coating machine can only achieve a dry thickness error of 2-3 μm on one side and 4-6 μm on both sides. Power lithium-ion batteries are mainly used in the field of electric vehicles, and often hundreds of single batteries are used in series and parallel, which requires very high consistency of batteries. In the coating process, an error of 4-6 μm in the thickness of the pole piece is caused, which is one of the main reasons for the poor consistency of the current power battery. [0003] At present, there are two main methods of man...

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): H01M10/0583H01M2/26H01M4/139
CPCY02E60/122Y02E60/12Y02E60/10Y02P70/50
Inventor 孙全
Owner NANJING SHUANGDENG SCI TECH DEV RES INST
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com