Energy conservation and emission reduction is a main theme in the automotive industry, and lightweight is one of the most effective measures for energy conservation and emission reduction in automobiles. Due to technological requirements, new energy vehicles are bound to gain weight compared to traditional vehicles, making the requirement for lightweight more urgent. However, it is crucial to choose suitable plastic materials to encapsulate the power battery of new energy vehicles. Below is a material selection guide to help you choose plastic materials with excellent performance and reliability.
Power battery packaging plastic materials need to meet specific requirements in terms of high temperature resistance, chemical corrosion, electrical insulation, mechanical strength, flame retardancy, and environmental friendliness to ensure the performance and safety of the battery system in automotive product usage scenarios.
1. High temperature resistance: The power battery system of new energy vehicles generates high temperatures during operation, so plastic materials need to have good high temperature resistance to maintain stable performance and structural integrity.
2. Chemical corrosion resistance: There are various electrolytes and chemicals in the battery, and plastic materials need to have good chemical corrosion resistance to prevent reactions with internal substances in the battery and ensure the normal operation of the battery system.
3. Electrical insulation performance: Battery packaging materials need to have good electrical insulation performance to prevent electrical short circuits or leaks inside the battery, and ensure the safety and stability of the battery system.
4. Mechanical strength: Plastic materials need to have sufficient mechanical strength to ensure that the structure of the battery packaging is stable, able to withstand vibration and impact during vehicle operation, and ensure the reliability and durability of the battery system.
5. Flame retardant performance: Considering the safety of the battery system, plastic materials with good flame retardant performance need to be selected when selecting materials to reduce the risk of fire and safety accidents.
6. Environmental friendliness: Pay attention to environmental protection and sustainable development, prioritize the selection of plastic materials that meet environmental requirements, have recyclable or biodegradable properties, and reduce negative impacts on the environment.
Selection of Plastic Packaging Materials for New Energy Power Batteries
1. Module Housing
The plastic shell of the battery module currently requires not only lightweight requirements, but also material "design integration" to meet the needs of improving battery and vehicle power density. So currently, there are two main requirements for materials: one is to have good mechanical properties, including good impact resistance and a certain degree of toughness; Secondly, it has certain processing performance and can be processed into thin-walled components and complex shapes. Polyphenylene oxide (PPO) is currently one of the popular materials for new energy vehicles, especially in the battery sector.
2. Seals
Power battery seals are used to seal the edges of batteries, and the materials must have good high-temperature resistance, chemical resistance, and sealing performance, as well as certain elasticity and wear resistance. Commonly used sealing materials include polypropylene (PP), polybutylene terephthalate (PBT), etc
3. Battery tray
As the structural component of the battery, the tray also accounts for the majority of its weight. There are requirements for materials with good strength and stiffness, corrosion resistance, and high temperature resistance. Commonly used tray materials include polycarbonate (PC), polyphenylene oxide (PPO), etc.