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A kind of lithium-ion battery packaging structure and packaging method thereof

A lithium-ion battery and packaging structure technology, applied in structural parts, secondary batteries, battery pack parts, etc., can solve the problems of battery user injury, large packaging binding force, poor puncture resistance, etc., to avoid Interference with battery performance, avoid scalding or burns, and improve the effect of safe service life

Active Publication Date: 2020-03-31
HUNAN LIFANG NEW ENERGY SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat-sealed composite aluminum-plastic film has high safety, and can achieve the effect of pressure relief by encapsulation failure when the internal pressure exceeds the standard, but the material itself has poor puncture resistance; both the aluminum shell and the stainless steel shell have strong Puncture resistance, higher package restraint can lead to increased air pressure, which increases the risk of explosion
In the traditional packaging method, when the internal thermal runaway caused by internal short circuit or severe side reaction of the battery occurs, the battery will burn or explode, and cause harm to the user of the battery; at the same time, the direction of the burning or explosion is Random, the user cannot perform selective avoidance, resulting in an increased risk of injury

Method used

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  • A kind of lithium-ion battery packaging structure and packaging method thereof
  • A kind of lithium-ion battery packaging structure and packaging method thereof
  • A kind of lithium-ion battery packaging structure and packaging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 As shown, a lithium-ion battery packaging structure includes a bare cell 1, a first casing 2 and a second casing 3, the thickness of the first casing 2 is greater than the thickness of the second casing 3, and the first casing 2 One side of the body is coated with a first colloidal layer 23, the second housing 3 includes a framework layer 31, a second colloidal layer 33 and a protective layer 32, the second colloidal layer 33 is coated on one side of the framework layer 31, and the protective layer 32 is coated On the other side of the framework layer 31 , the bare cell 1 is packaged between the first case 2 and the second case 3 by heat-compressing the first colloidal layer 23 and the second colloidal layer 33 . The framework layer 31 has a square structure, and the second colloid layer 33 is coated on the surrounding edges of the framework layer 31 . The first casing 2 includes an accommodating portion 21 and an adhesive portion 22 connected to the a...

Embodiment 2

[0030] Such as figure 2 As shown, a lithium-ion battery packaging structure includes a bare cell 1, a first casing 2 and a second casing 3, the thickness of the first casing 2 is greater than the thickness of the second casing 3, and the first casing 2 One side of the body is coated with a first colloidal layer 23, the second housing 3 includes a framework layer 31, a second colloidal layer 33 and a protective layer 32, the second colloidal layer 33 is coated on one side of the framework layer 31, and the protective layer 32 is coated On the other side of the framework layer 31 , the bare cell 1 is packaged between the first case 2 and the second case 3 by heat-compressing the first colloidal layer 23 and the second colloidal layer 33 . The framework layer 31 has a square structure, and the second colloid layer 33 is coated on the entire surface of the framework layer 31 . The first casing 2 includes an accommodating portion 21 and an adhesive portion 22 connected to the acc...

Embodiment 3

[0033] Such as image 3As shown, a lithium-ion battery packaging structure includes a bare cell 1, a first casing 2 and a second casing 3, the thickness of the first casing 2 is greater than the thickness of the second casing 3, and the first casing 2 One side of the body is coated with a first colloidal layer 23, the second housing 3 includes a framework layer 31, a second colloidal layer 33 and a protective layer 32, the second colloidal layer 33 is coated on one side of the framework layer 31, and the protective layer 32 is coated On the other side of the framework layer 31 , the bare cell 1 is packaged between the first case 2 and the second case 3 by heat-compressing the first colloidal layer 23 and the second colloidal layer 33 . The framework layer 31 has a square structure, and the second colloid layer 33 is coated on the surrounding edges of the framework layer 31 . The first casing 2 includes an accommodating portion 21 and an adhesive portion 22 connected to the ac...

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Abstract

The invention belongs to the technical field of batteries, and in particular relates to a lithium-ion battery packaging structure, which includes a bare cell, a first case and a second case, the thickness of the first case is greater than that of the second case, and the first case One side of the shell is coated with a first colloidal layer, the second shell includes a framework layer, a second colloidal layer and a protective layer, the second colloidal layer is coated on one side of the framework layer, and the protective layer is coated on the other side of the framework layer, bare The electric core is packaged between the first casing and the second casing by means of hot-press packaging the first colloidal layer and the second colloidal layer. The second casing is weaker than the first casing. When thermal runaway occurs, the heat will be released in the direction of the second casing, that is, the direction of battery combustion or explosion is toward the second casing. Therefore, the user can Tips to avoid the direction of burning or explosion towards the user or others to reduce the occurrence of safety accidents. In addition, the invention also provides a packaging method for the lithium ion battery.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a lithium-ion battery packaging structure and a packaging method thereof. Background technique [0002] With the development of modern society, various mobile devices such as video cameras, notebook computers, portable DVDs, digital cameras, etc. have been used more and more widely, thus requiring a large number of high-energy batteries. Lithium-ion secondary battery is a kind of battery with high energy density, so it is widely used in various mobile devices. [0003] The traditional packaging method of lithium-ion batteries is to use composite aluminum-plastic film, aluminum shell or stainless steel shell for packaging. The heat-sealed composite aluminum-plastic film has high safety, and can achieve the effect of pressure relief by encapsulation failure when the internal pressure exceeds the standard, but the material itself has poor puncture resistance; both the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M10/058H01M10/0525H01M50/10
CPCH01M10/0525H01M10/058H01M50/10Y02E60/10Y02P70/50
Inventor 刘凯
Owner HUNAN LIFANG NEW ENERGY SCI & TECH