A flame retardant material for lithium battery shell based on long glass fiber reinforced polypropylene and its preparation method

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, reasonable design, and practicability strong effect

Active Publication Date: 2018-02-27
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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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  • A flame retardant material for lithium battery shell based on long glass fiber reinforced polypropylene and its preparation method
  • A flame retardant material for lithium battery shell based on long glass fiber reinforced polypropylene and its preparation method
  • A flame retardant material for lithium battery shell based on long glass fiber reinforced polypropylene and its preparation method

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

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] Wherein, polypropylene is high-melting finger block copolymerized polypropylene, and its comonomer is ethylene, and vinyl content is 2-4mol%, and the melt flow rate of high melting finger block copolymerized polypropylene is 120g / 10min (test condition : 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-hydroxyphen...

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

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Abstract

The invention discloses a lithium battery shell flame-retardant material based on long glass fiber reinforced polypropylene and a preparation method thereof. The lithium battery shell flame-retardant material is prepared from the following components in parts by weight: polypropylene, continuous glass fiber , coupling agent, main antioxidant, auxiliary antioxidant, lubricant, compatibilizer, composite flame retardant and black masterbatch. The preparation method is to put the above components except the continuous glass fiber into the high mixer and mix them evenly before entering the extruder, and then the extruder melts and extrudes the above materials into the impregnation equipment, and at the same time the continuous glass fiber enters the impregnation equipment It is dispersed and impregnated with the molten material, and finally pulled out from the shaping die of the impregnation equipment, cooled, dried, and pelletized to obtain the finished product. The invention has more excellent strength and toughness, is not easy to burn under an open flame, can effectively reduce the occurrence of battery burning accidents, and ensures that the shell has good plasticity and compressive strength.

Description

technical field [0001] 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 [0002] 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. [0003] At present, lithium batteries are classified according to the casing, mainly including steel casing, aluminum casing, flexible packag...

Claims

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Application Information

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Patent Type & Authority Patents(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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