What is the UV resistance of a battery box?

Ultraviolet rays are a part of the sunlight that we cannot see. They are very powerful and can cause significant damage to various materials over time. The UV resistance performance of battery boxes varies depending on the material used. The following is an analysis of the UV resistance performance of common battery box materials:

 

Aluminum alloy

Aluminum alloy battery boxes have good weather resistance, but their ability to absorb and reflect ultraviolet radiation is limited. Long term exposure to strong ultraviolet radiation may cause slight oxidation on the surface, but it will not affect its mechanical properties and protective functions.

 

 

Composite material

 

SMC composite material: has excellent UV resistance, with a maximum aging thickness of less than 50 μ m on the surface for 20 years, which is less than 1% of the box thickness, and has no significant impact on mechanical properties.

 

Carbon fiber composite material: It has strong UV resistance and advantages such as lightweight and high strength, but the cost is relatively high. Currently, it is mostly used in high-end car models.

 

Polypropylene (PP): It has good UV stability and can ensure long-term use of batteries in high and low temperature environments.

 

 

Plastic (such as PPO, PC)
 

PPO (polyphenylene oxide): commonly used in photovoltaic junction box bodies, it has the characteristics of high rigidity, high heat resistance, flame retardancy, and good UV resistance.

 

PC (polycarbonate): easily corroded by various substances, long-term exposure to ultraviolet radiation may cause material aging and brittleness, and anti ultraviolet additives need to be added to improve performance.

 

Summary:
Aluminum alloy, composite materials, polypropylene and other materials have good UV resistance for battery cases, which can meet long-term outdoor use needs; Plastic materials need to be judged based on specific formulas and additives. Some high-performance plastics perform well, while ordinary plastics need to be used with caution.

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