Application of flame retardant plastic materials in new energy vehicle parts

Jun 28, 2022

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There are many parts of automobiles that use flame retardant materials, especially new energy vehicles, and the application of flame retardant materials is more extensive. Especially in charging piles and battery parts, plastic parts are required to be flame retardant. Today, let’s take a look at the common flame retardant materials and corresponding parts in automobiles.

When it comes to new energy vehicles, this is one of the hottest areas in recent years. For material people, the most concern may be the application of new materials in automobiles. Compared with traditional vehicles, new energy vehicles are very different in material selection. For example, battery modules, charging piles, charging guns, etc., must be made of flame-retardant materials. Let’s take a look at it together. Look!

1. Charging gun

As a charging connector for electric vehicles, the charging gun is a “bridge” between charging facilities such as charging piles and electric vehicles. The quality of the charging gun directly affects the charging performance and safety. The material requirements of the charging gun are relatively high. Common materials are: PBT+GF, PA+GF, weather-resistant PC, etc.

2. Plug and socket

The materials of socket plugs are mainly PBT-GF25 FR/PBT-GF30 FR, PA66-GF25 FR/PA66-GF30 FR and PA66-GF25 FR/PA66-GF30 FR (Free of halogen).

3. Shell

The shell of the charging pile is generally made of flame retardant PC material. The material features are: halogen-free flame retardant, high surface gloss, excellent electrical insulation properties, and excellent mechanical properties.

4. Other components

There is currently no unified material use standard for charging piles. By comparing the use environment requirements of charging piles with other industry products, recommended material solutions:

1. Power module shell material – similar to power tool rechargeable battery shell – PA66+FR material;

2. The internal cooling fan of the pile body is made of PBT+GF or PPE+GF material, generally using axial flow fan blades;

3. Internal circuit breaker control system of pile body – MCB or MCCB material – halogen-free flame retardant nylon material;

4. The metal isolation bracket inside the DC pile body – replace steel with plastic – ultra-high glass fiber reinforced material or flame retardant reinforced nylon material.

5. Battery module shell

The battery pack shell can generally be used: steel, aluminum alloy, SMC composite material, carbon fiber reinforced composite material, LGF-PP, PBT/ASA, etc.

Due to its good comprehensive performance, plastic case is the main development direction of power battery shell materials. It is reported that in the power battery standard, corresponding clear flame retardant requirements are put forward for the battery shell box, and now more and more More and more companies have also begun to use flame-retardant plastics for power batteries.

Six, car connector

The basic requirements of connector materials: heat resistance and flame retardant! The connector contacts are metal, and the number of times of insertion and removal is high. The material is required to have good flame retardancy, heat resistance, and avoid fire. At present, the commonly used materials for connectors are PBT and PPS. , PA, PPE, PET, etc.

Seven, electric vehicle charging line

Different from traditional wires and cables, car charging cables have high requirements on materials because of their particular application environment. Due to the short charging time, high current intensity and high frequency of use of electric vehicles, the material is required to have certain high temperature resistance and aging resistance while ensuring good insulation, and has halogen-free flame retardant and low smoke during combustion. density.