Supercharge Your Innovation With Domain-Expert AI Agents!

Tab-free lithium ion battery and manufacturing method thereof

An ion battery, electrodeless ear lithium technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, battery pack components, etc. Improve battery safety performance, avoid short-circuit risks, and fix firmly

Pending Publication Date: 2021-10-15
CHONGQING ZIJIAN NEW ENERGY CO LTD +1
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above manufacturing method simplifies the existing process and can improve the manufacturing efficiency of the battery, since the positive pole piece and the negative pole piece are misplaced and wound, when squeezed by the conductive shell, the internal pole piece is easily misplaced, resulting in the electrochemical degradation of the battery. The performance is degraded, and the positive electrode empty foil area and the negative electrode empty foil area are directly connected to the positive electrode conductive casing and the negative electrode conductive casing, and the contact reliability is poor, which will affect the electrochemical performance.

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
  • Tab-free lithium ion battery and manufacturing method thereof
  • Tab-free lithium ion battery and manufacturing method thereof
  • Tab-free lithium ion battery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Please refer to Figure 1 to Figure 3 , Embodiment 1 of the present invention provides a tabless lithium-ion battery.

[0035] The electrodeless lithium-ion battery includes a positive electrode conductive case 11 and a negative electrode conductive case 12, the positive electrode conductive case 11 is fastened inside the negative electrode conductive case 12, and the two are fastened together to form a sealed cavity inside , the inside of the cavity is equipped with a battery cell 2 and an electrolyte, and an insulating sealing ring 13 is provided between the positive electrode conductive shell 11 and the negative electrode conductive shell 12. Further, in this embodiment, the negative electrode The size of the conductive shell 12 is larger than the size of the positive conductive shell 11, and the positive conductive shell 11 is installed inside the negative conductive shell 12. In other embodiments, the size of the positive conductive shell 11 can also be larger than...

Embodiment 2

[0044] Please refer to Figure 1 to Figure 3 Embodiment 2 of the present invention provides a method for manufacturing the tabless lithium-ion battery described in Embodiment 1: comprising the following steps:

[0045] Step S1: Prepare the positive electrode active material member and the negative electrode active material member; coat the positive electrode active material member on one or both sides of the positive electrode current collector 41 to form the positive electrode coating layer 42; coat the negative electrode active material material member The negative electrode coating layer 52 is formed on one side or both sides of the negative electrode current collector 51 .

[0046] Step S2: The surface of the positive electrode current collector 41 is not completely coated with positive electrode active material components, and there is still a part of the empty foil area; at the same time, the surface of the negative electrode current collector 51 is not completely coated...

Embodiment 3

[0052] Embodiment 3 of the present invention provides a detailed description of Embodiment 2.

[0053] Firstly, positive electrode active material slurry and negative electrode active material slurry are prepared.

[0054] The positive electrode active material slurry is coated on the positive electrode current collector 41 to form the positive electrode coating layer 42 ; the negative electrode active material slurry is coated on the negative electrode current collector 51 to form the negative electrode coating layer 52 .

[0055] The main component of the positive electrode active material slurry is lithium cobaltate, the surface density is 12.10mg / cm2, and the compacted density is 4.15g / cm3.

[0056] The main component of the negative electrode active material slurry is artificial graphite, the surface density is 7.11mg / cm2, and the compacted density is 1.50g / cm3.

[0057] An insulating coating 7 made of ceramic material is coated on both sides of the positive electrode co...

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
densityaaaaaaaaaa
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a tab-free lithium ion battery and a manufacturing method thereof. The tab-free lithium ion battery comprises a positive conductive shell and a negative conductive shell, the positive conductive shell is buckled to the inner side of the negative conductive shell to form a closed cavity, and a battery cell and electrolyte are arranged in the cavity. An insulating sealing ring is arranged between the positive conductive shell and the negative conductive shell, and the battery cell comprises a positive pole piece, a negative pole piece and a diaphragm. The positive pole piece comprises a positive current collector and a positive coating layer, the negative pole piece comprises a negative current collector and a negative coating layer, the interiors of the positive conductive shell and the negative conductive shell are coated with conductive adhesive layers, and the positive electrode current collector and the negative electrode current collector are tightly connected with the positive electrode conductive shell and the negative electrode conductive shell through conductive adhesive layers respectively. According to the invention, the connection between the positive pole piece and the negative pole piece and the conductive shells is more reliable, the normal exertion of the electrochemical performance is ensured, and the safety performance of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a tabless lithium ion battery and a manufacturing method thereof. Background technique [0002] The conventional lithium-ion battery manufacturing process includes a welding process; for a single tab cylindrical winding battery, usually a positive tab is directly welded on the positive current collector, and a negative tab is welded on the negative current collector, and then respectively Weld the positive tab to the positive conductive shell, and weld the negative tab to the negative conductive shell; for multi-tab soft-pack stacked batteries, first, pre-set the positive tab group reserved on the positive current collector. Welding, and then weld the positive tab to the positive tab group, secondly, pre-weld the negative tab group reserved on the negative current collector, and then weld the negative tab to the negative tab group, finally, pass Hot-melt the tab gl...

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): H01M50/109H01M50/184H01M50/186H01M50/531H01M4/13H01M10/0525H01M10/058
CPCH01M50/109H01M50/184H01M50/186H01M50/531H01M4/13H01M10/0525H01M10/058Y02P70/50Y02E60/10
Inventor 雷付权王继涛张勇陈启多程君程转霞
Owner CHONGQING ZIJIAN NEW ENERGY CO LTD
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