Preparation method of automobile flame-retardant battery case upper cover with electromagnetic shielding function

A technology of electromagnetic shielding and battery case, which is applied in the field of preparation of the upper cover of the flame-retardant battery case of automobiles. It can solve the problems that polymer composite materials are difficult to meet the flame-retardant requirements, and achieve excellent electromagnetic shielding function, low density and enhanced mechanical properties. Effect

Active Publication Date: 2019-11-15
SHANGHAI LINGYUN IND TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, polymer composites are often difficult to meet the stringent flame retardant requirements in GB / T 31467.3-2015

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The specific implementation scheme for the preparation of the upper cover of the new energy vehicle flame-retardant battery case with electromagnetic shielding function is as follows:

[0024] 65 wt % PET, 10 wt % flame retardant (polythiophenylphosphonate: zirconium phosphate: silicon dioxide weight ratio is 6:2:1), 3 wt % hollow microspheres, 1 wt % n-butyl acrylate-glycidyl ester, 0.5 wt % triethylene glycol ether-bis(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 0.5 wt % polypropylene Wax and 20 wt% carbon fiber were mixed uniformly at 230 °C using a screw extruder and then extruded into billets. The billet was placed in a mold with a temperature of 70°C, and a hydraulic press was used to close the mold and apply a pressure of 10 MPa for 110s. After releasing the pressure and demoulding, the projected area is 2.2m 2 The product. The material density of this product is 1.41g / cm 3 , its electromagnetic shielding effectiveness is 39~50dB (230MHz~1GHz), its fla...

Embodiment 2

[0026] The specific implementation scheme for the preparation of the upper cover of the new energy vehicle flame-retardant battery case with electromagnetic shielding function is as follows:

[0027] 71 wt % of PET, 8 wt % of flame retardant (phenyl dicarboxyphenyl phosphorus oxide: zinc carbonate: silica weight ratio of 7:2:1), 6 wt % of hollow microspheres, 3 wt % of POE-g-GMA, 1 wt % of triethylene glycol ether-bis(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 1% of magnesium stearate and 10 wt % stainless steel fibers were mixed uniformly at 260°C using a screw extruder and then extruded into billets. Place the billet in a mold with a temperature of 90°C, close the mold with a hydraulic press and apply a pressure of 8MPa for 65s. After pressure relief and demoulding, the projected area is 1.6m 2 Flame retardant battery case cover products. The material density of this product is 1.48g / cm 3 , the electromagnetic shielding effectiveness is 55~65dB (230MHz~1GHz), the...

Embodiment 3

[0029] The specific implementation scheme for the preparation of the upper cover of the new energy vehicle flame-retardant battery case with electromagnetic shielding function is as follows:

[0030] 75 wt % of PET, 13 wt % of flame retardant (phenyldicarboxyphenyl phosphorus oxide: zinc carbonate: silica weight ratio of 7:2:1), 5 wt % of hollow microspheres, 1 wt % n-butyl acrylate-glycidyl ester, 0.5 wt % triethylene glycol ether-di(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 0.5% polypropylene wax and 5 wt % copper fibers were mixed uniformly at 240 °C using a screw extruder and then extruded into billets. Place the billet in a mold with a temperature of 80°C, close the mold with a hydraulic press and apply a pressure of 6MPa for 80s. After pressure relief and demoulding, the projected area is 1.6m 2 Flame retardant battery case cover products. The material density of this product is 1.51g / cm 3 , the electromagnetic shielding effectiveness is 50~64dB (230MHz~1GHz...

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Abstract

The invention relates to a preparation method of an automobile flame-retardant battery case upper cover with electromagnetic shielding function. A PET modified material is employed to prepare the flame-retardant battery case upper cover, and the PET modified material includes the following components by weight percentage: 65-75wt% of PET, 5-20wt% conductive fiber, 3-6wt% of hollow microbeads, 8-13wt% of a flame retardant, 1-3wt% of a toughening agent, and 0.5-2wt% of a processing aid. The method includes the steps of: a. blending the raw materials PET, conductive fiber, hollow microbeads, theflame retardant, the toughening agent and the processing aid evenly in a formula ratio, and then performing extrusion to obtain a PET modified material blank; and b. putting the prepared blank into amould, applying certain pressure by a hydraulic machine, and conducting mould pressing to obtain the automobile flame-retardant battery case upper cover. The new energy automobile flame-retardant battery case upper cover prepared from the above material by the method provided by the invention has advantages of excellent electromagnetic shielding function, low density, high flame retardance and excellent mechanical strength.

Description

technical field [0001] The invention relates to a preparation method of an automobile battery case upper cover, in particular to a preparation method of an automobile flame-retardant battery case upper cover with an electromagnetic shielding function. Background technique [0002] With the development of new energy vehicles, electric vehicles using power batteries are increasingly using some lightweight polymer composite materials based on the consideration of energy saving and weight reduction. The flame retardancy and electromagnetic shielding performance of these materials are often poor. Compared with traditional vehicles, electric vehicles use high-voltage and high-power power batteries, and the electromagnetic shielding effect of the power battery shell has an impact on the electromagnetic compatibility of the vehicle that cannot be ignored. In addition, polymer composites are often difficult to meet the stringent flame retardant requirements in GB / T 31467.3-2015. Co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L51/06C08L33/08C08L85/02C08K13/04C08K7/26C08K3/26C08K3/36C08K5/5397C08K7/06C08K3/32
CPCC08L67/02C08L2205/03C08L2205/035C08L2201/02C08L2203/20C08K2003/321C08K2201/014C08L33/068C08L85/02C08K13/04C08K7/26C08K3/32C08K3/36C08K7/06C08L51/06C08K3/26C08K5/5397
Inventor 陈梓山胡淼冯浩宇李彦波陈雨张展裴庆
Owner SHANGHAI LINGYUN IND TECH CO LTD
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