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Filling and sealing silicon rubber for lithium batteries

A technology for silicone rubber and lithium batteries, applied in the field of silicone rubber materials, can solve problems such as difficulty in meeting the requirements of fluidity and shock absorption performance, and achieve the effects of improving flexibility, reducing entanglement, and improving fluidity

Inactive Publication Date: 2019-03-22
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The viscosity of the potting silicone rubber obtained in the above-mentioned prior art is more than 4000mPa·s, the hardness after curing is more than 60A (Shore hardness), and the density is more than 3g / cm 3 Above, it is difficult to meet the requirements of potting silicone rubber materials for lithium batteries for fluidity before curing and shock absorption performance after curing

Method used

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  • Filling and sealing silicon rubber for lithium batteries
  • Filling and sealing silicon rubber for lithium batteries
  • Filling and sealing silicon rubber for lithium batteries

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Potting silicone rubber 1 was prepared by the following method:

[0047] It is obtained by mixing component A and component B according to the mass ratio of 1:1, and curing at 140°C for 60 minutes after defoaming under vacuum.

[0048] The A component is obtained by mixing the following components: 77.9 kg of methyl vinyl polysiloxane with a weight average molecular weight of 10,000 and a vinyl content of 4 wt%, 10 kg of a weight average molecular weight of 15,000 with an active hydrogen content of 0.8 wt % of methyl hydrogen polysiloxane, 12kg average particle size of 38μm density of 0.56g / cm 3 Hollow glass microspheres and 0.1kg inhibitor divinyltetramethyldisiloxane, the viscosity of component A is 987cps.

[0049] The B component is obtained by mixing the following components: 49.4 kg of methyl vinyl polysiloxane with a weight average molecular weight of 25,000 and a vinyl content of 0.8 wt%, 35 kg of silicon nitride powder with an average particle size of 5 μm, 1...

Embodiment 2

[0051] Prepare potting silicone rubber 2 by the following method:

[0052] It is obtained by mixing component A and component B according to the mass ratio of 1:1, and curing at 140°C for 60 minutes after defoaming under vacuum.

[0053] The A component is obtained by mixing the following components: 75 kg of methyl vinyl polysiloxane with a weight average molecular weight of 10,000 and a vinyl content of 4 wt %, 14 kg of a weight average molecular weight of 15,000 with an active hydrogen content of 0.8 wt % Methyl hydrogen polysiloxane, 10.99kg average particle size 38μm density 0.56g / cm 3 Hollow glass microspheres and 0.01kg inhibitor divinyltetramethyldisiloxane, the viscosity of component A is 1140cps.

[0054] The B component is obtained by mixing the following components: 38 kg of methyl vinyl polysiloxane with a weight average molecular weight of 50,000 and a vinyl content of 0.8 wt%, 40 kg of silicon nitride powder with an average particle size of 5 μm, 20 kg of The ...

Embodiment 3

[0056] Prepare potting silicone rubber 3 by the following method:

[0057] The only difference from Example 1 is that the glass microspheres added in components A and B are replaced by the same mass with an average particle diameter of 98 μm and a density of 0.5 g / cm 3 hollow glass microspheres.

[0058] The viscosity of component A in the potting silicone rubber obtained in Example 3 was 860 cps, and the viscosity of component B was 1030 cps.

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Abstract

The invention provides filling and sealing silicon rubber for lithium batteries. The silicon rubber is prepared by curing a component A and a component B, wherein the component A comprises 75-80wt% ofmethyl vinyl polysiloxane, 4-20wt% of methyl hydrogen polysiloxane, 10-30wt% of glass microspheres and 0.01-0.1wt% of an inhibitor; the component B comprises 30-60wt% of methyl vinyl polysiloxane, 20-40wt% of an inorganic filler, 10-20wt% of glass microspheres and 0.05-2wt% of a catalyst. According to the filling and sealing silicon rubber, the glass microspheres are introduced into two-componentsilicon rubber, two-component reaction type filling and sealing silicon rubber with high shearing strength, hardness being less than 25 (Shore A) and density being less than 1.28 g / cm<3> can be prepared; the viscosity of each component of the two-component reaction type filling and sealing silicon rubber is less than 1400 cps; the requirements of vehicle-mounted lithium batteries on light weight,low density and high flowability of the filling and sealing silicon rubber can be met.

Description

technical field [0001] The invention belongs to the field of silicone rubber materials, in particular to a potting silicone rubber for lithium batteries. Background technique [0002] Lithium battery materials for vehicles have many complex electrical components such as electronic components, high-power circuit modules, and large-scale integrated circuit boards. The above-mentioned components need to be filled and sealed to fix the components and protect them from environmental influences. The filling and sealing of electrical components is usually carried out with potting glue. The potting glue used needs to have good insulation properties, low water absorption, good vibration absorption, and firm adhesion to electronic components and boards without corroding components. And other performance, with the increase of energy density of lithium battery packs for vehicles and the increase of the power of electronic components, the requirements for potting glue are getting higher ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/05C08K7/28C08K3/34
CPCC08L83/04C08L2205/025C08K7/28C08K3/34
Inventor 胡国新刘金明陈芳林旭锋李江华陈天广陈柏富陈寒
Owner 兆舜科技(广东)有限公司