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Insulating fluororubber material for sealing lithium battery and preparation method thereof

An insulating material and fluororubber technology, which is applied in the field of insulating fluororubber materials for sealing lithium batteries and their preparation fields, can solve the problem that the requirements of electrolyte resistance cannot be met, the silicone rubber has poor dielectric resistance, and the volume resistance cannot meet the requirements of lithium battery seals. and other problems, to achieve the effect of excellent electrolyte resistance, high insulation performance and good insulation performance

Inactive Publication Date: 2020-06-12
江苏中煜橡塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The patent application number is 201210192295.8 "A Silicone Rubber Insulated Fluorine Rubber Cable Material and Its Preparation Method". It uses silicone rubber as the base and assists polytetrafluoroethylene plastic. It has excellent electrical properties and is environmentally friendly and wear-resistant. Dielectric performance is very poor, unable to meet the requirements of electrolyte resistance
[0004] The patent application number is 201220402359.8 "a kind of fluoroplastic insulated fluororubber sheathed cable", with fluororubber as the main material, which has good characteristics of high temperature resistance, oil resistance, tear resistance, etc. Resistors cannot meet the requirements of lithium battery seals

Method used

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  • Insulating fluororubber material for sealing lithium battery and preparation method thereof
  • Insulating fluororubber material for sealing lithium battery and preparation method thereof
  • Insulating fluororubber material for sealing lithium battery and preparation method thereof

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preparation example Construction

[0029] The preparation method of the insulating fluororubber material used for lithium battery sealing comprises:

[0030] (1) Put the fluororubber into the internal mixer for mastication, and then add reinforcing fillers, vulcanization aids, and some processing aids in turn for mixing; after degluing at no higher than 120 ° C, make triangular bags and turn over on the open mixer The rubber is re-mixed, parked for 20-30 hours, and the mixed rubber is obtained;

[0031] (2) Put the mixed rubber into the internal mixer again, add the remaining vulcanizing agent and processing aids for mixing; after the rubber is not higher than 90°C, make triangular bags and turn the rubber on the open mixer for additional mixing. Refining is to keep turning the mixed rubber on the open mill and the rubber turning machine to make the rubber mix more evenly.

Embodiment 1

[0033] The insulating fluororubber material used for lithium battery sealing of the present embodiment includes the following components by mass: 100 parts of fluororubber, 4.5 parts of insulating filler barium sulfate, 22.5 parts of reinforcing filler carbon black, processing aids fatty acid derivatives and silicone 2.5 parts of the condensation product, 1 part of palm wax as a processing aid, 1.5 parts of peroxide curing agent 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane, 0.3 parts of dicumyl peroxide and 2.7 parts of triallyl isocyanurate as a vulcanization aid.

[0034] The preparation method of the insulating fluororubber material used for lithium battery sealing of the present embodiment comprises the following steps:

[0035] (1) Put the fluororubber into the internal mixer for mastication to 60°C, then add reinforcing filler carbon black, banbury for 120 seconds, add insulating filler barium sulfate and vulcanization aid triallyl isocyanurate, dense After refining for ...

Embodiment 2

[0041] The insulating fluororubber material used for lithium battery sealing in this embodiment includes the following components in parts by mass: 100 parts of fluororubber, 8.7 parts of insulating filler white carbon black, 20.3 parts of reinforcing filler carbon black, and 1 part of processing aid stearic acid 1.6 parts of condensation products of fatty acid derivatives and silicone processing aids, 0.5 parts of palm wax as processing aids, 2,5-dimethyl-2,5-bis(tert-butyl peroxy) peroxide vulcanizing agent 1.4 parts of hexane, 2 parts of triallyl isocyanurate and 0.3 parts of N,N'-m-phenylene bismaleimide as vulcanization aid.

[0042] The preparation method of the insulating fluororubber material used for lithium battery sealing of the present embodiment comprises the following steps:

[0043] (1) Put the fluororubber into the internal mixer for mastication to 50°C, then add reinforcing filler carbon black and vulcanization aid triallyl isocyanurate, banbury to 75°C, add i...

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Abstract

The invention discloses an insulating fluororubber material for sealing a lithium battery and a preparation method thereof. The insulating fluororubber material comprises the following components in parts by weight: 100 parts of fluororubber, 5-15 parts of an insulating material, 12-30 parts of a reinforcing filler, 0.75-2.5 parts of a peroxide vulcanizing agent, 1.5-3 parts of a vulcanizing aid and 0.8-6 parts of a processing aid. The fluororubber material has excellent electrolyte resistance, volume expansion is less than 35% after the fluororubber material is soaked in an electrolyte, and mass expansion is less than 20%. Meanwhile, the material has good insulating property; the volume resistance of the material is more than 2 * 10 < 12 > omega.cm, the volume resistance is more than 1000M omega (1000V voltage, delayed reading is tested for 3 seconds) after the material is assembled into the sealing material of the lithium battery, the high-temperature compression set is below 20% (200 DEG C * 70 hours), and the sealing and insulating requirements of the lithium ion battery are met.

Description

technical field [0001] The invention belongs to the technical field of battery sealing materials, and in particular relates to an insulating fluororubber material used for lithium battery sealing and a preparation method thereof. Background technique [0002] The electrolyte is an important part of the lithium battery, and the rubber seal of the electrolyte obviously also plays a role that cannot be ignored. Due to the complex composition of the electrolyte, the material requirements for the sealing ring are very high. At present, the sealing ring materials mainly include nitrile rubber, perfluoroether rubber, C-type fluororubber, silicone rubber and EPDM rubber. Nitrile rubber is mainly used for oil seal products. It has limited high temperature resistance and cannot withstand the manufacturing process of lithium battery cover plates; although perfluoroether rubber has high reliability, it is very expensive, which is not conducive to the promotion of lithium batteries; sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/22C08L83/04C08K13/02C08K3/30C08K3/04C08K13/04C08K7/26
CPCC08K2003/3045C08L27/22C08L2201/08C08L2203/206C08L2205/03C08L83/04C08K13/02C08K3/30C08K3/04C08K13/04C08K7/26
Inventor 不公告发明人
Owner 江苏中煜橡塑科技有限公司
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