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Functional coating material component of isolating membrane for power battery and preparation method thereof

A coating material and power battery technology, applied in coatings, polyamide coatings, polyurea/polyurethane coatings, etc., can solve the problem of battery life and safety reduction, poor thermal shrinkage resistance of the isolation film, and poor electrical conductivity of the isolation film and other issues, to achieve the effect of improving performance, good heat shrinkage resistance, and improving puncture strength

Inactive Publication Date: 2018-01-30
HUIZHOU JIAHENENG NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the power battery pack, the separator is one of the necessary materials for the power battery pack, but the current separator has a simple structure, a single preparation component, and poor thermal shrinkage resistance of the separator, which leads to a reduction in the service life and safety of the battery. , which brings some inconvenience to people's use, and the existing isolation film has poor conductivity, which reduces the performance of the battery

Method used

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  • Functional coating material component of isolating membrane for power battery and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] see figure 1 , a functional coating material assembly for a power battery separator, comprising a base film 1 and a coating layer 2; the coating layer material is composed of the following components, in parts by mass: nano-scale aluminum oxide 30 parts; 30 parts of aramid fiber; 10 parts of polymer emulsion; 5 parts of porous polyimide nanofiber; 5 parts of nanoporous shell powder and diatom mud; 5 parts of crosslinking agent; 1 part of water-based fluorine leveling agent; 2 parts of agent; 1 part of stabilizer.

[0029] The base film 1 adopts an ethylene-propylene copolymerized polymer membrane with micropores evenly arranged on the surface;

[0030] The polymer emulsion is selected as one or more of polyacrylate silicone acrylic emulsion or polyurethane;

[0031] The crosslinking agent is one or more of divinylbenzene, diisocyanate, acrylamide, aziridine crosslinking agent or peroxide crosslinking agent;

[0032] Described water-based fluorine leveling agent is a ...

Embodiment 2

[0041] see figure 1 , a functional coating material assembly for a power battery separator, comprising a base film 1 and a coating layer 2; the coating layer material is composed of the following components, in parts by mass: nano-scale aluminum oxide 35 parts; 35 parts of aramid fiber; 15 parts of polymer emulsion; 8 parts of porous polyimide amine nanofiber; 8 parts of nanoporous shell powder and diatom mud; 8 parts of crosslinking agent; 2 parts of water-based fluorine leveling agent; 4 parts of dispersant; 2 parts of stabilizer.

[0042] The base film 1 adopts an ethylene-propylene copolymerized polymer membrane with micropores evenly arranged on the surface;

[0043] The material used in the polymer emulsion is one or more of polyacrylate silicone acrylic emulsion or polyurethane;

[0044] The crosslinking agent is one or more of divinylbenzene, diisocyanate, acrylamide, aziridine crosslinking agent or peroxide crosslinking agent;

[0045] Described water-based fluorin...

Embodiment 3

[0054] see figure 1, a functional coating material assembly for a power battery separator, comprising a base film 1 and a coating layer 2; the coating layer material is composed of the following components, in parts by mass: nano-scale aluminum oxide 40 parts; 40 parts of aramid fiber; 20 parts of polymer emulsion; 10 parts of porous polyimide nanofiber; 10 parts of nanoporous shell powder and diatom mud; 10 parts of crosslinking agent; 5 parts of water-based fluorine leveling agent; 5 parts of agent; 3 parts of stabilizer.

[0055] The base film 1 adopts an ethylene-propylene copolymerized polymer membrane with micropores evenly arranged on the surface;

[0056] The polymer emulsion is selected as one or more of polyacrylate silicone acrylic emulsion or polyurethane;

[0057] The crosslinking agent is one or more of divinylbenzene, diisocyanate, acrylamide, aziridine crosslinking agent or peroxide crosslinking agent;

[0058] Described water-based fluorine leveling agent i...

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Abstract

The invention discloses a functional coating material component of an isolating membrane for a power battery. The functional coating material component of the isolating membrane for the power batterycomprises a base film and a coating layer; the coating layer comprises the following materials taken as components calculated in parts by mass: 30-40 parts of nano-scale aluminum oxide, 30-40 parts ofaramid fibers, 10-20 parts of polymer emulsion, 5 to 10 parts of porous polyimide nanofibers, 5-10 parts of nano-porous shell powder and diatom mud, 5-10 parts of a crosslinking agent, 1-5 parts of an aqueous fluorine leveling agent, 2-5 parts of a dispersant and 1-3 parts of a stabilizer. The isolating membrane is added with the aramid fibers to improve the porosity uniformity of the isolating membrane and increase the puncture resistance strength of the isolating membrane, and has good heat shrinkage resistance to improve the practical life of the battery, in addition, the isolating membrane is added with the porous polyimide nanofibers and the nano-porous shell powder and the diatom mud, and the porous material structure has excellent liquid absorption to greatly improve the performance of ions passing through the isolating membrane and the conductive capability so as to further improve use performances of the battery.

Description

technical field [0001] The invention belongs to the field of production and processing of battery separators, and in particular relates to a functional coating material component of a separator for power batteries. Background technique [0002] Power batteries are widely used in real life and work, especially in the field of electric vehicles. Power batteries are the power source of electric vehicles, providing kinetic energy for the driving of electric vehicles, and providing convenience for people's work and life. People are welcome. [0003] In the power battery pack, the separator is one of the necessary materials for the power battery pack, but the current separator has a simple structure, a single preparation component, and poor thermal shrinkage resistance of the separator, which leads to a reduction in the service life and safety of the battery. , which brings some inconvenience to people's use, and the existing isolation film has poor conductivity, which reduces th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D177/10C09D133/04C09D175/04C09D7/61C09D7/65C08J7/04C08J9/36
Inventor 杨思成杨华共
Owner HUIZHOU JIAHENENG NEW ENERGY TECH CO LTD
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