Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Welding method, preparation method and welding structure of cylindrical battery

A welding method and technology for cylindrical batteries, applied in structural parts, battery pack parts, circuits, etc., can solve the problems of difficult welding, affecting welding performance, brittle fracture of welded joints, etc., to improve welding performance and prevent intermetallic compounds. the effect of

Pending Publication Date: 2022-07-29
JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there will be a problem in doing so. Since the tabs are made of aluminum or copper, the physical properties such as the melting point and thermal conductivity of aluminum and copper are very different from those of the steel shell of the cylindrical battery. Therefore, it is easy to form metal when welding the tabs and the top cover. Intermetallic compounds, because intermetallic compounds can easily lead to brittle fracture of welded joints, thus affecting welding performance and making welding difficult

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
  • Welding method, preparation method and welding structure of cylindrical battery
  • Welding method, preparation method and welding structure of cylindrical battery
  • Welding method, preparation method and welding structure of cylindrical battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0054] As used in the specification and claims, certain terms are used to refer to particular components. It should be understood by those skilled in the art that hardware manufacturers may refer to the same component by different nouns. The description and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as a criterion for distinguishing. As mentioned in the entire specification and claims, "comprising" is an open-ended term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range, and basically achieve technical effects.

[0055] Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

[0056]In the invention, unless otherwise expressly specified ...

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
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a welding method, a preparation method and a welding structure of a cylindrical battery, the welding method comprises the following steps: step 1, tabs with different polarities are led out from the same end of a battery cell, and the tabs comprise a positive tab and a negative tab; 2, dividing the top cover into a first cover plate and a second cover plate, wherein the first cover plate and the second cover plate are respectively arranged above the positive pole lug and the negative pole lug; step 3, arranging welding pieces between the top cover and the electrode lugs, arranging a first welding piece between the first cover plate and the positive electrode lug, and arranging a second welding piece between the second cover plate and the negative electrode lug; and 4, laser welding is used for sequentially penetrating through the top cover, the welding piece and the electrode lug, and fusion welding of the top cover, the welding piece and the electrode lug is achieved. By arranging the welding piece between the top cover and the tab, the welding piece, the tab and the top cover can form a continuous solid solution in the welding process, and generation of intermetallic compounds is prevented, so that the welding performance is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a welding method, a preparation method and a welding structure of a cylindrical battery. Background technique [0002] With the development of new energy vehicles, batteries with high energy density have become a development trend. Cylindrical cells have high grouping efficiency and good consistency, and have broad application prospects. In particular, Tesla's launch of the 4680 cylindrical battery has a significant impact on the new energy industry. [0003] In the manufacturing process of the existing cylindrical battery, the electrode lugs are first rubbed into a plane by rubbing the electrode lugs, and the bus bar and the rubbed electrode lugs are welded together by laser spot welding. Then the negative busbar needs to be welded to the shell wall, and the positive busbar needs to be welded to the positive column, which requires one more process, and the busbar...

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
IPC IPC(8): H01M50/169H01M50/536
CPCH01M50/536H01M50/169Y02E60/10
Inventor 卢军太魏建良焦叶辉李勇军
Owner JIANGSU ZENIO NEW ENERGY BATTERY TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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