Seal structure for lithium ion cell

A lithium-ion battery and sealing structure technology, which is applied to structural parts, battery cover/end cover, battery pack parts, etc., can solve the problems of poor welding strength and poor air tightness, and achieve protection from damage and good sealing , the effect of ensuring safety

Inactive Publication Date: 2005-06-15
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
View PDF2 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to overcome the shortcomings of poor airtightness and poor welding strength in the prior art due to poor sealing of the electrolyte injection hole, the purpose of the present invention is to provide a battery with good airtightness that can prevent moisture fr

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
  • Seal structure for lithium ion cell
  • Seal structure for lithium ion cell
  • Seal structure for lithium ion cell

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0027] Please refer to figure 1 and Figure 5 In this embodiment, a square lithium ion battery is taken as an example. The lithium ion battery sealing structure of the present invention includes a can body 80 and a cover plate 110 sealed and welded to the can body 80. Wherein, a positive terminal 106 is formed in the middle of the cover plate 110, and two sides of the positive terminal 106 are provided with liquid injection holes 112 and an explosion-proof device 102 is sealed and installed.

[0028] The tank 80 has a square shape, and can contain the positive electrode, the negative electrode, the separator and the electrolyte inside the tank 80. The tank 80 has a square opening (not labeled in the figure).

[0029] The cover plate 110 has a size and shape matching the square opening, and can be sealed and covered on the opening by welding. The cover ...

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 disclosed seal structure for improving tightness and security includes a metal tank body and an upper cover. The upper cover is welded onto the metal tank body combined as an integrated body. A hole for injecting electrolyte is setup on the upper cover. A sealing element is inserted and plugged onto the said hole, and the sealing element welded onto the upper cover is combined as an integrated body. The sealing element and injection hole can form screw thread couple further in order to reinforce tightness and bonding strength. The seal structure guarantees favorable tightness for injection hole. Moreover, the sealing element can support larger pressure, prevent weld from breakage so as to raise security.

Description

【Technical field】 [0001] The invention relates to a battery packaging structure, in particular to a lithium ion battery sealing structure using liquid electrolyte. 【Background technique】 [0002] In recent years, the functions of computers, communication electronic products, and consumer electronic products have become more and more powerful, and their external dimensions have become smaller and lighter, so battery products with high capacity and small size are popular. Lithium-ion batteries, in particular, have the characteristics of large capacity, high energy density, and high voltage, and their market share in mobile phones, notebook computers, digital cameras and other products continues to rise. [0003] Lithium-ion batteries are based on lithium cobalt oxide (LiCoO 2 ), lithium nickel oxide (LiNiO 2 ) or lithium manganese oxide (LiMn 2 o 4 ) and the like are positive electrode active materials, and lithium metal, lithium alloys or carbon materials are used as nega...

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): H01M50/147H01M50/566H01M50/636
CPCY02E60/10
Inventor 黄文正黄全德
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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