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Lithium battery case flame-retardant material based on long-glass-fiber-reinforced polypropylene and preparation method thereof

A technology of flame-retardant materials and polypropylene, which is applied in the field of flame-retardant materials for lithium battery shells based on long glass fiber reinforced polypropylene and its preparation, can solve problems such as thermal safety hazards, and achieve safety assurance, strong practicability, and impact good toughness effect

Active Publication Date: 2013-05-22
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a lithium battery shell flame-retardant material based on long glass fiber reinforced polypropylene and its preparation method, and reduce the ignition point of the battery shell by changing the composition of the battery shell material to solve the problem of heat generated by the battery. safety hazards

Method used

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  • Lithium battery case flame-retardant material based on long-glass-fiber-reinforced polypropylene and preparation method thereof
  • Lithium battery case flame-retardant material based on long-glass-fiber-reinforced polypropylene and preparation method thereof
  • Lithium battery case flame-retardant material based on long-glass-fiber-reinforced polypropylene and preparation method thereof

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Effect test

Embodiment 1

[0034] 1. The flame retardant material for lithium battery case based on long glass fiber reinforced polypropylene is prepared from the following components by weight: polypropylene: 35 parts, continuous glass fiber: 35 parts, coupling agent: 0.25 parts, Primary antioxidant: 0.05 parts, auxiliary antioxidant: 0.05 parts, lubricant: 0.8 parts, compatibilizer: 4.0 parts, composite flame retardant: 24 parts, black masterbatch: 1.0 parts;

[0035] Among them, polypropylene is high-melting block copolymerized polypropylene, its comonomer is ethylene, vinyl content is 2-4mol%, and the melt flow rate of high-melting block copolymerized polypropylene is 115g / 10min (test conditions : temperature 230°C, load 2.16Kg); the continuous glass fiber is continuous non-alkali glass fiber, the fiber diameter is 22μm, and the linear density is 1200tex; the coupling agent is γ-aminopropyltriethoxysilane; the main antioxidant is selected Tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl)propiona...

Embodiment 2

[0043] 1. The flame retardant material for lithium battery case based on long glass fiber reinforced polypropylene is prepared from the following components in parts by weight: polypropylene: 30 parts, continuous glass fiber: 40 parts, coupling agent: 0.1 parts, Primary antioxidant: 0.01 parts, auxiliary antioxidant: 0.1 parts, lubricant: 0.5 parts, compatibilizer: 3.5 parts, composite flame retardant: 28 parts, black masterbatch: 0.5 parts;

[0044] Among them, polypropylene is high-melting block copolymerized polypropylene, its comonomer is ethylene, vinyl content is 2-4mol%, and the melt flow rate of high-melting block copolymerized polypropylene is 120g / 10min (test conditions : temperature 230°C, load 2.16Kg), the continuous glass fiber is continuous non-alkali glass fiber, the fiber diameter is 17μm, and the linear density is 2400tex; the coupling agent is γ-2,3 glycidoxy-propyltrimethoxy Silane; the main antioxidant is β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl pr...

Embodiment 3

[0052] 1. The flame retardant material for lithium battery case based on long glass fiber reinforced polypropylene is prepared from the following components in parts by weight: polypropylene: 40 parts, continuous glass fiber: 30 parts, coupling agent: 0.5 parts, Primary antioxidant: 0.1 part, auxiliary antioxidant: 0.01 part, lubricant: 1 part, compatibilizer: 4.2 parts, composite flame retardant: 20 parts, black masterbatch: 1.0 part;

[0053] Among them, polypropylene is high-melting block copolymerized polypropylene, its comonomer is ethylene, vinyl content is 2-4mol%, and the melt flow rate of high-melting block copolymerized polypropylene is 130g / 10min (test conditions : temperature 230°C, load 2.16Kg), the continuous glass fiber is made of continuous non-alkali glass fiber, the fiber diameter is 10μm, and the linear density is 3600tex; the coupling agent is γ-aminopropyltriethoxysilane; the main antioxidant Use tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propio...

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Abstract

The invention discloses a lithium battery case flame-retardant material based on long-glass-fiber-reinforced polypropylene and a preparation method thereof. The lithium battery case flame-retardant material is prepared from the following components in parts by weight: polypropylene, continuous glass fiber, coupling agent, main antioxidant, auxiliary antioxidant, lubricant, compatilizer, composite flame retardant and black master batch. The preparation method comprises the following steps: adding all the components expect the continuous glass fiber into a high-speed mixer, uniformly mixing, sending into an extruding machine, carrying out melt extrusion on the material into an impregnator, and meanwhile, sending the continuous glass fiber into the impregnator to carry out disperse impregnation with the molten material; and finally, carrying out die drawing at a setting port of the impregnator, cooling, carrying out blow-dry, and granulating to obtain the finished product. The lithium battery case flame-retardant material disclosed by the invention has higher strength and toughness, can not be easily combusted in naked fire, can effectively lower the possibility of battery combustion accidents, and ensures the case to have high plasticity and compressive strength.

Description

[0001] technical field [0002] The invention relates to the field of lithium battery production and manufacturing, in particular to a lithium battery case flame-retardant material based on long glass fiber reinforced polypropylene and a preparation method thereof. Background technique [0003] The battery is the heart of the electric vehicle. The specific energy (wh / kg) of the battery determines the mileage of the electric vehicle, and its specific power (w / Kg) affects the maximum speed, acceleration performance and climbing ability of the electric vehicle. Lithium batteries have decades of development history. The technology is relatively mature, the specific power is also large, the cycle life can reach about 800-1000 times, and the cost is low. Therefore, lithium batteries are currently the most widely used batteries for electric vehicles. [0004] At present, lithium batteries are classified according to the casing, mainly including steel casing, aluminum casing, flexib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08K13/04C08K7/14C08K5/03C08K3/22C08J3/22B29B9/06B29B15/10B29B7/30
Inventor 杨桂生蒋超杰
Owner HEFEI GENIUS NEW MATERIALS
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