Preparation method for double-layer PET protective film for lithium battery pack

A lithium battery pack and protective film technology, which is applied in the field of preparation of double-layer PET protective films, can solve the problems of flammable and explosive electric vehicle fragility of battery packs, restricting the development of lithium battery enterprises, poor high temperature resistance, etc., and achieves puncture resistance. High strength, easy control, good flexibility

Active Publication Date: 2016-07-20
SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] New energy vehicles have the characteristics of high-speed movement, violent vibration, high-temperature work, and rapid charging and discharging when driving, resulting in potential dangers such as impact, stabbing, short connection, falling, water immersion, and fire when the power battery is in use. One-tenth of the non-safety rate will cause extremely serious consequences. Therefore, compared with traditional fuel vehicles, the flammability and explos

Method used

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  • Preparation method for double-layer PET protective film for lithium battery pack
  • Preparation method for double-layer PET protective film for lithium battery pack

Examples

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Example Embodiment

[0032]

[0033] A method for preparing a double-layer PET protective film for lithium battery packs includes the following steps:

[0034] Step 1): Take 80 parts by weight of acrylic pressure-sensitive adhesive, 30 parts by weight of ethyl acetate and 30 parts by weight of methyl ethyl ketone, stir and mix well, then add 10 parts by weight of blue color paste, 2 parts by weight of white color paste, and 0.5 parts by weight in sequence Yellow color paste, 0.1 parts by weight of tannic acid and 1 part by weight of additives, and finally 2 parts by weight of hexamethylene diisocyanate and 0.8 parts by weight of lithium tetrafluoroborate are added, and the mixture is evenly stirred to obtain a viscous liquid. Including 40wt% polyoxyethylene polyoxyacetone amine ether, 15wt% polydimethylsiloxane, 15wt% acetylacetone and 30wt% dibutyltin dilaurate, the blue color paste, white color paste and yellow The viscosity of the color paste is 1500CPS;

[0035] Step 2): After coating the adhesive...

Example Embodiment

[0037]

[0038] A method for preparing a double-layer PET protective film for lithium battery packs includes the following steps:

[0039] Step 1): Take 120 parts by weight of acrylic pressure-sensitive adhesive, 50 parts by weight of ethyl acetate and 40 parts by weight of methyl ethyl ketone, stir and mix uniformly, and then add 5 parts by weight of blue color paste, 1 part by weight of white color paste, and 0.1 parts by weight. Yellow color paste, 0.5 parts by weight of glyceryl tristearate and 3 parts by weight of additives, and finally 1 part by weight of hexamethylene diisocyanate and 0.2 parts by weight of lithium tetrafluoroborate are added, and the mixture is evenly stirred to obtain a viscous liquid. The auxiliary agent includes 50% by weight of polyoxypropylene glycerol ether, 20% by weight of polyester-modified siloxane, 10% by weight of ethylenediaminetetraacetic acid and 20% by weight of dibutyl tin maleate, the blue color paste , The viscosity of white color paste...

Example Embodiment

[0042]

[0043] A method for preparing a double-layer PET protective film for lithium battery packs includes the following steps:

[0044] Step 1): Take 100 parts by weight of acrylic pressure-sensitive adhesive, 40 parts by weight of ethyl acetate and 35 parts by weight of methyl ethyl ketone, stir and mix well, then add 7 parts by weight of blue color paste, 1.5 parts by weight of white color paste, and 0.3 parts by weight in sequence Yellow color paste, 0.3 parts by weight of glyceryl tristearate and 2 parts by weight of additives, and finally 1.5 parts by weight of hexamethylene diisocyanate and 0.5 parts by weight of lithium tetrafluoroborate are added, and the mixture is evenly stirred to obtain a viscous liquid. The auxiliary agent includes 43wt% of polyoxypropylene polyoxyethylene glyceryl ether, 16wt% of polyester modified siloxane, 13wt% of ethylenediaminetetraacetic acid and 28wt% of dibutyltin dilaurate. The viscosity of blue color paste, white color paste and yellow ...

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Abstract

The invention provides a preparation method for a double-layer PET protective film for a lithium battery pack. The preparation method comprises the following steps: firstly, uniformly stirring and mixing acrylic pressure sensitive adhesive, ethyl acetate and butanone, then adding blue paste, white paste, yellow paste, a retarder and an assistant into the mixture in sequence, finally, adding hexamethylene diisocyanate and lithium tetrafluoroborate, and stirring uniformly to obtain an adhesive liquid; secondly, coating a single surface of a PET substrate with the adhesive liquid, performing heating treatment through 6 to 8 sections of baking channels in sequence until the residual solvent amount of the adhesive liquid does not exceed 0.5 parts; adhering the PET substrate which is coated with the adhesive liquid and a PET which is not coated with the adhesive liquid to obtain a double-layer PET composite film; coating the single surface of the PET composite film with the adhesive liquid, heating until the residual solvent amount of the adhesive liquid does not exceed 0.5 parts, discharging bubbles and winding at normal temperature. The PET protective film disclosed by the invention has high toughness, puncture resistance, high insulating property, high temperature resistance, and high adhesivity to an aluminum shell of a lithium battery, and has no residual adhesive after the PET protective film is peeled; the protection on the lithium battery pack when a new energy vehicle is driven is effectively realized.

Description

technical field [0001] The present invention relates to a PET protective film. More specifically, the present invention relates to a method for preparing a double-layer PET protective film for a lithium battery pack. Background technique [0002] In order to solve the increasingly serious energy and environmental problems, more and more countries around the world pay attention to energy conservation and emission reduction. For the environmental pollution caused by automobiles, the best solution at present is to vigorously develop new energy vehicles, especially electric vehicles. Therefore, as a key component of new energy vehicles, lithium battery packs are being widely used with the popularization of new energy vehicles, and their power supply performance, stability and safety are one of the factors that determine the further development and market promotion of new energy vehicles. Key factor. [0003] New energy vehicles have the characteristics of high-speed movement, ...

Claims

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Application Information

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IPC IPC(8): C09J7/02C09J133/00C09J11/06C09J11/04B32B27/36B32B27/06B32B7/10B32B33/00B32B37/12B32B38/16
CPCB32B7/10B32B27/08B32B27/36B32B33/00B32B37/1284B32B38/164C08L2205/03C08L2205/035C09J7/255C09J7/385C09J11/04C09J11/06C09J133/00C08L71/02C08L83/04C08K13/02C08K5/103C08K5/07C08K5/29C08K3/38
Inventor 金闯葛东来
Owner SUZHOU SIDIKE NEW MATERIALS SCI & TECH
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