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Cylindrical lithium ion battery having internal heat dissipation and tab fixing structure, and preparation method thereof

A lithium-ion battery and fixed structure technology, which is applied in the direction of secondary batteries, structural parts, battery pack parts, etc., can solve problems such as heat conduction and conduction, and achieve the effect of improving current resistance

Inactive Publication Date: 2019-06-07
SHANDONG GOLDENCELL ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can effectively solve the problem of poor heat conduction and electrical conduction at the welding position of the negative electrode tab

Method used

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  • Cylindrical lithium ion battery having internal heat dissipation and tab fixing structure, and preparation method thereof
  • Cylindrical lithium ion battery having internal heat dissipation and tab fixing structure, and preparation method thereof
  • Cylindrical lithium ion battery having internal heat dissipation and tab fixing structure, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] A cylindrical lithium-ion battery with internal heat dissipation and tab fixing structure and its preparation method, taking the 26650-3Ah-3.2V model battery as an example, the structure is as follows figure 1 , figure 2 The shown includes: a steel shell (1), a cap (2), a positive electrode sheet (3), a separator (4), a negative electrode sheet (5), an electrolyte (6), an insulating layer (7), and a conductive layer (9). A welding point (10) is formed after the battery negative pole tab (8) is spot-bottom welded.

[0021] The tab (8) is wrapped and fixed by the conductive layer (9), and the conductive layer (9) is covered with an insulating layer (7).

[0022] After the inner core of the battery is put into the case, the bottom welding of the negative electrode point is performed to form a welding point (10).

[0023] 5, acetone 70. , triethanolamine 15, copper powder 400, butanediol diglycidyl ether   Inject epoxy resin conductive adhesive, and form a conductive la...

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PUM

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Abstract

The invention discloses a cylindrical lithium ion battery having an internal heat dissipation and tab fixing structure, and a preparation method thereof. The lithium ion battery is characterized in that the structure of the battery includes a steel shell (1), a cover cap (2), positive plates (3), diaphragms (4), negative plates (5), an electrolyte (6), an insulating layer (7) and a conducting layer (9); and a negative tab (8) of the battery can form a soldering point (10) after spot bottom welding. The contact of the tab and a shell bottom can be significantly improved by fixing the tab through a conductive adhesive, so that current resistance capabilities can be enhanced, and the lithium ion battery is suitable for large power application batteries; risks of tab dropping caused by violentvibration can be solved through the fixation of the conductive adhesive; and through the insulating layer and the conducting layer, the heat generated during large current discharging of the batterycan be rapidly dissipated.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and relates to a cylindrical lithium ion battery with an internal heat dissipation and tab fixing structure and a preparation method. Background technique [0002] Due to the advantages of high energy density, small self-discharge, and excellent cycle performance, lithium-ion batteries are widely used in backup power supplies, energy storage devices, electric vehicles, electric bicycles, and power tools. Lithium batteries are mainly composed of five parts: positive electrode, negative electrode, diaphragm, electrolyte and shell. According to the shell method, it is divided into cylindrical battery, square battery and pouch battery. During the welding process of the negative tab of the cylindrical battery, only one or two solder joints are formed. When the battery is discharged with a high current, there will be a large local heat generation. In addition, the small solder joint are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0587H01M10/0525H01M2/26H01M2/04
CPCY02E60/10Y02P70/50
Inventor 李涛王勇周会
Owner SHANDONG GOLDENCELL ELECTRONICS TECH
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