A preparation method of an automobile flame-retardant battery case upper cover with electromagnetic shielding function

An electromagnetic shielding and battery case technology is applied in the field of preparation of the upper cover of automobile flame-retardant battery cases, which can solve the problem that polymer composite materials are difficult to meet the flame-retardant requirements, achieve excellent electromagnetic shielding function, improve flame-retardant performance, and enhance mechanical properties. performance effect

Active Publication Date: 2022-01-04
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] 65wt% of PET, 10wt% of flame retardant (polythiophenylphosphonate: zirconium phosphate: silicon dioxide weight ratio is 6:2:1), 3wt% of hollow microspheres, 1wt% of acrylic acid Butyl-glycidyl ester, 0.5wt% triethylene glycol ether-bis(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 0.5wt% polypropylene wax and 20wt% The carbon fibers were mixed uniformly at 230°C using a screw extruder and then extruded into billets. Place the billet in a mold with a temperature of 70°C, close the mold with a hydraulic press and apply a pressure of 10MPa 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 flame retardant...

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] 71wt% PET, 8wt% flame retardant (phenyl dicarboxyphenyl phosphorus oxide: zinc carbonate: silicon dioxide weight ratio is 7:2:1), 6wt% hollow microspheres, 3wt% POE- g-GMA, 1wt% triethylene glycol ether-bis(3-tert-butyl-4-hydroxyl-5-methylphenyl) propionate, 1% magnesium stearate and 10wt% stainless steel fibers, Use a screw extruder to mix uniformly at 260° C. and then extrude the billet. 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 flame retardant test has...

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] 75wt% of PET, 13wt% of flame retardant (phenyl dicarboxyphenyl phosphorus oxide: zinc carbonate: silicon dioxide weight ratio is 7:2:1), 5wt% of hollow microspheres, 1wt% of acrylic acid Butyl ester-glycidyl ester, 0.5wt% triethylene glycol ether-di(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate, 0.5% polypropylene wax and 5wt% 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 (230...

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Abstract

A method for preparing an automobile flame-retardant battery case upper cover with electromagnetic shielding function. The flame-retardant battery case upper cover is prepared by using a PET modified material. The PET modified material includes the following components in weight percentage: 65-75wt% PET, The conductive fiber of 5-20wt%, the hollow microsphere of 3-6wt%, the fire retardant of 8-13wt%, the toughening agent of 1-3wt% and the processing aid of 0.5-2wt%; comprise the steps: a 1. After uniformly blending the raw materials PET, conductive fiber, hollow microspheres, flame retardant, toughening agent and processing aid in the formula quantity, extrude to obtain the PET modified material blank; b. Place the prepared blank in the mold , apply a certain pressure through a hydraulic press, and mold the upper cover of the automobile flame-retardant battery case. The flame-retardant battery case upper cover of the new energy automobile prepared by the material and method of the invention has the advantages of excellent electromagnetic shielding function, low density, high flame retardancy 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 Patents(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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