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Pole seal material for lithium ion batteries and preparation method of pole seal material for lithium ion batteries

A sealing material and lithium battery technology, applied in the field of modified rubber, can solve the problems of poor high-temperature pressure change performance, low tensile strength, low resistivity, etc., and achieve excellent high-temperature pressure change, improved processing performance, and high conductivity Effect

Active Publication Date: 2018-12-25
广州国机智能橡塑密封科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The patent application number is 201210038416.3 "An EPDM-based conductive rubber and its preparation method". The conductive material based on ethylene-propylene rubber has excellent electrolyte resistance and low resistivity (0.02-0.09Ω cm), but its tensile strength is extremely low (1MPa) and its high temperature pressure change performance is poor

Method used

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  • Pole seal material for lithium ion batteries and preparation method of pole seal material for lithium ion batteries
  • Pole seal material for lithium ion batteries and preparation method of pole seal material for lithium ion batteries
  • Pole seal material for lithium ion batteries and preparation method of pole seal material for lithium ion batteries

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Embodiment 1

[0038] As an embodiment of the pole sealing material of the lithium battery described in the present invention, the pole sealing material of the lithium battery described in this embodiment includes the following components in parts by mass: 70 parts of fluorine rubber, 30 parts of ethylene propylene rubber, super 7 parts of conductive carbon black, 6 parts of weak conductive carbon black, 3 parts of mixture of natural fatty acid calcium salt and amide fat wax, 1 part of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane 0.5 parts, 0.5 parts of dicumyl peroxide and 2.5 parts of triallyl isocyanurate.

[0039] The BET specific surface area of ​​superconducting carbon black described in the present embodiment is 1000m 2 / g, the BET specific surface area of ​​the weakly conductive carbon black is 800m 2 / g.

[0040] The preparation method of the pole sealing material of the lithium battery described in this embodiment comprises the following steps:

[0041] 1. Make the roller distan...

Embodiment 2

[0049] As an embodiment of the pole sealing material of the lithium battery described in the present invention, the pole sealing material of the lithium battery described in this embodiment includes the following components in parts by mass: 75 parts of peroxide vulcanized fluororubber, ethylene-propylene rubber 25 parts, 11 parts of superconducting carbon black, 1 part of aliphatic hydrocarbon processing aid, 1 part of wax processing aid, 1 part of organosilicon compound, 0.5 part of magnesium aluminum hydrotalcite, 2,5-dimethyl-2, 1 part of 5-bis(tert-butylperoxy)hexane, 0.5 part of dicumyl peroxide, 1 part of triallyl isocyanurate and N, N'-m-phenylene bismaleimide 1 part of amine.

[0050] The Mooney viscosity [ML (1+10) 121 ℃] of peroxide vulcanized fluororubber in the present embodiment is 17~33, and fluorine content is 69wt%~71wt%; The Mooney viscosity [ML( 1+4) 100°C] is 8 to 55, and the ethylene content is 45wt% to 54wt%; the BET specific surface area of ​​the superc...

Embodiment 3

[0061] As an embodiment of the pole sealing material of the lithium battery described in the present invention, the pole sealing material of the lithium battery described in this embodiment includes the following components in parts by mass: 72 parts of peroxide vulcanized fluororubber, ethylene-propylene rubber 28 parts, 15 parts of superconducting carbon black, 1 part of aliphatic hydrocarbon derivatives, 0.5 parts of organosilicon compound, 2 parts of magnesium aluminum hydrotalcite, 2,5-dimethyl-2,5-bis(tert-butyl peroxy base) 1.5 parts of hexane, 1.5 parts of dicumyl peroxide, 1 part of triallyl isocyanurate and 1.5 parts of N, N'-m-phenylene bismaleimide.

[0062] The Mooney viscosity [ML (1+10) 121 ℃] of peroxide vulcanized fluororubber in the present embodiment is 17~33, and fluorine content is 69wt%~71wt%; The Mooney viscosity [ML( 1+4) 100°C] is 8 to 55, and the ethylene content is 45wt% to 54wt%; the BET specific surface area of ​​the superconducting carbon black is...

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Abstract

The invention discloses a pole seal material for lithium ion batteries and a preparation method of the pole seal material for the lithium ion batteries. Fluorous rubber serving as a main matrix and auxiliary materials including auxiliary rubber, conductive filler, processing auxiliary agents, a peroxide vulcanizing agent, an auxiliary cross-linking agent and the like are mixed through an open mixing mill or an internal mixing mill to obtain low-compression-set high-conductivity rubber composite material. Under the condition that low resistance and high electrolyte resistance are guaranteed, consumption of the conductive filler is decreased, and the composite material integrates low compression set and high conductivity. The material has excellent conductivity and compressive deformation characteristics, a volume resistance range is 10<2> omega cm-10<4> omega cm, and high-temperature compressive deformation is 30% or below (150 DEG C*70h). In addition, the material is excellent in physical and mechanical property, heat resistance, ageing resistance and electrolyte resistance and is quite suitable for conductive pole sealing of the lithium ion batteries.

Description

technical field [0001] The invention relates to the technical field of modified rubber, in particular to a pole sealing material for a lithium ion battery and a preparation method thereof. Background technique [0002] Conductive rubber usually refers to volume resistance in 10 9 Rubber materials within Ω·cm, but rubber is an excellent insulating material, and the volume resistance is generally greater than 10 14 Ω·cm, to reduce its volume resistance to 10 4 It is difficult to achieve stable mass production within Ω·cm. At present, conductive PPS plastic is generally used as the conductive material of the positive pole of lithium-ion batteries in the market. Although it has a relatively low conductivity, it does not meet the current lightweight requirements of lithium-ion battery packs, and its long life and high reliability Not guaranteed, the cost is higher. In addition, the current sealing method of the positive electrode pole uses PPS plastic and insulating rubber ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/12C08L27/22C08L23/16C08K13/02C08K3/04
CPCC08K2201/001C08K2201/006C08K2201/014C08L27/12C08L27/22C08L2203/20C08L2205/03C08L23/16C08K13/02C08K3/04
Inventor 成煜民
Owner 广州国机智能橡塑密封科技有限公司
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