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A heat-dissipating and cold-resistant packaging material for lithium battery packs

A technology for lithium battery packs and packaging materials, applied in the field of packaging materials and packaging materials for lithium battery packs, can solve the problems of the safety and overall performance of lithium batteries not keeping up, the decrease of available power of lithium batteries, and the reduction of lithium ion activity, etc. Avoid heat loss, light weight, and overall low number of layers

Active Publication Date: 2019-12-10
徐州腾飞工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, lithium batteries are in a stage of continuous improvement in performance, continuous reduction in cost, rapid expansion of application fields, and a sharp increase in market share. If the safety and overall performance of lithium batteries cannot keep up with the rapid growth trend, it will inevitably restrict the industry. develop
[0003] As the shell of the battery core, the packaging material of the lithium battery is of great significance to ensure the long-term use safety of the lithium battery. However, in order to achieve effective protection, most of the existing lithium battery packaging materials have many layers, heavy weight, and high (above 70°C) heat dissipation is not enough, causing the lithium battery to expand, which brings the hidden danger of explosion; although some packages have good heat dissipation effect, they are not cold-resistant (below -40°C), and the activity of lithium ions will be greatly reduced under low temperature working conditions. Causes the available power of the lithium battery to decrease, and cannot work normally at low temperature

Method used

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  • A heat-dissipating and cold-resistant packaging material for lithium battery packs
  • A heat-dissipating and cold-resistant packaging material for lithium battery packs
  • A heat-dissipating and cold-resistant packaging material for lithium battery packs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The airgel layer 2 used is silica airgel,

[0033] Adhesive layer 3 is a thixotropic cyanoacrylate adhesive,

[0034] The heat dissipation material reinforcement layer 4 is mixed with the following components in mass parts:

[0035] PET: 20 parts;

[0036] Antioxidant: 1.0 parts;

[0037] Lubricant: 1.5 parts;

[0038] Light stabilizer: 0.4 parts;

[0039] Cooling powder: 40 parts;

[0040] Among them, the selected PET has a viscosity of 0.8, and the heat dissipation powder is aluminum oxide; and three (2,4-di-tert-butylphenyl) phosphite, the mixture obtained by mixing in a mass ratio of 1:1; The light stabilizer is a hindered amine light stabilizer;

[0041] A polyester nanocomposite coating layer 5 is provided outside the heat dissipation material reinforcement layer 4 by mechanical extrusion, and the composition and mass ratio of the polyester nanocomposite coating layer 5 are:

[0042] PET: 60%,

[0043] Nano barium sulfate or nano titanium dioxide: 39%,

...

Embodiment 2

[0055] Airgel layer 2 is alumina airgel,

[0056] The adhesive layer 3 is a cyanoacrylate non-droplet adhesive containing a modified silicon dioxide thixotropic agent,

[0057] The heat dissipation material reinforcement layer 4 is mixed with the following components in mass parts:

[0058] PET: 40 copies;

[0059] Antioxidant: 0.4 parts;

[0060] Lubricant: 0.5 parts;

[0061] Light stabilizer: 0.2 parts;

[0062] Cooling powder: 80 parts;

[0063] Among them, the selected PET has a viscosity of 0.88, and the cooling powder is zinc oxide; and three (2,4-di-tert-butylphenyl) phosphite, the mixture obtained by mixing in a mass ratio of 1:1; the lubricant is oleamide and ethylene bisstearamide in a ratio of 1:1 The light stabilizer is a benzophenone ultraviolet absorber;

[0064] A polyester nanocomposite coating layer 5 is provided outside the heat dissipation material reinforcement layer 4 by mechanical extrusion, and the composition and mass ratio of the polyester nano...

Embodiment 3

[0075] Airgel layer 2 is zirconia airgel,

[0076] The adhesive layer 3 is a thixotropic a-cyanoacrylate adhesive,

[0077] The heat dissipation material reinforcement layer 4 is mixed with the following components in mass parts:

[0078] PET: 40 copies;

[0079] Antioxidant: 0.4 parts;

[0080] Lubricant: 0.5 parts;

[0081] Light stabilizer: 0.2 parts;

[0082] Cooling powder: 80 parts;

[0083] Among them, the selected PET has a viscosity of 0.88, and the cooling powder is zinc oxide; and three (2,4-di-tert-butylphenyl) phosphite, the mixture obtained by mixing in a mass ratio of 1:1; the lubricant is butyl stearate; the light stabilizer is a benzophenone ultraviolet Absorbent;

[0084] A polyester nanocomposite coating layer 5 is provided outside the heat dissipation material reinforcement layer 4 by mechanical extrusion, and the composition and mass ratio of the polyester nanocomposite coating layer 5 are:

[0085] PET: 80%,

[0086] Nano barium sulfate or nano t...

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Abstract

The invention discloses a heat-dissipating and cold-resistant packaging material for lithium battery packs. The packaging layer is arranged on the surface of a base material, including an airgel layer, an adhesive layer, and a heat-dissipating material reinforcement layer that are sequentially stacked from the surface of the base material. layer, polyester nanocomposite coating. In the lithium battery pack packaging material of the present invention, the heat-dissipating material reinforcement layer adopted can dissipate the heat generated by the chemical reaction of the liquid in the lithium battery liquid to the outside of the battery in time, and at the same time has high strength and fire resistance, which avoids external overheating while effectively preventing fire. Expansion and explosion caused by high temperature or pressure; due to the use of airgel materials, heat loss at low temperatures can be avoided, thereby preventing severe cold from being transmitted to the inside of the battery; fewer layers, low density, and light material combine the functions of heat dissipation and heat preservation as a whole Function, so that the inside of the lithium battery is in a constant temperature environment, the power of the lithium battery wrapped with the packaging material of the present invention is increased by more than 10 times at -30°C, and it can be continuously discharged in an environment of -41°C, and the discharge rate exceeds 75%.

Description

technical field [0001] The invention relates to a packaging material, in particular to a heat-dissipating and cold-resistant lithium battery pack packaging material, which belongs to the field of battery packaging. Background technique [0002] Lithium batteries, namely lithium-ion secondary batteries, are widely used in digital products such as mobile phones, notebook computers, cameras, and other electronic devices such as new energy electric vehicles due to their light weight, large capacity, long cycle life, and no memory effect. and device. At present, lithium batteries are in a stage of continuous improvement in performance, continuous reduction in cost, rapid expansion of application fields, and a sharp increase in market share. If the safety and overall performance of lithium batteries cannot keep up with the rapid growth trend, it will inevitably restrict the industry. develop. [0003] As the shell of the battery core, the packaging material of the lithium batter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M2/10H01M10/613H01M10/653C08L67/02C08K13/02C08K5/20C08K5/526C08K3/22C08K3/30B32B7/12B32B9/04B32B27/06B32B27/20B32B27/36B32B33/00H01M50/116H01M50/124H01M50/24
CPCH01M10/613H01M10/653C08K3/22C08K3/30C08K5/20C08K5/526C08K13/02B32B7/12B32B9/04B32B27/06B32B27/20B32B27/36B32B33/00C08K2201/011C08K2003/2227C08K2003/2296C08K2003/3045B32B2307/558B32B2307/3065B32B2307/302B32B2260/046B32B2260/021H01M50/116H01M50/124H01M50/24C08L67/02Y02E60/10
Inventor 高腾杨席兵杨其秀
Owner 徐州腾飞工程塑料有限公司