A Brief Discussion on the Future Development of UV Battery Coatings

I. Technical core: From single protection to multi-functional integration

UV battery coatings utilize a UV-triggered system to generate free radicals through internal photoinitiators, enabling rapid crosslinking and curing of monomers within 0.1 minutes, ultimately forming a dense protective coating with 100% solid content. Compared to traditional protective solutions (such as PET blue film), its core competitive advantages are mainly reflected in three aspects:

Production efficiency leap: The coating efficiency of the battery cell can reach 60PPM, which is 10 times that of the traditional PET blue film (6PPM), perfectly adapting to the high-speed takt time requirements of the automated production line for power batteries;

Balanced comprehensive performance: It possesses high dielectric strength, excellent electrolyte corrosion resistance, and reliable mechanical toughness. The failure mode is primarily due to cohesive failure within the coating (i.e., adhesive force > cohesive strength), resulting in stronger protective stability;

High environmental compliance: Zero VOC (volatile organic compounds) emissions throughout the entire process, not only meeting the strict requirements of the EU REACH regulation, but also satisfying the German VDA automotive industry certification standards, and adapting to the global mainstream market access rules.

1. Technological iteration path

Development stage Technical characteristics Representative application scenarios

Basic protection period: With acrylate resin as the core system, it only possesses a single insulation function. Basic protection for the surface of small lithium battery cells

Functional composite period: Integrating flame retardant, thermal conductivity, and flexible adjustment functions, such as Parker Sipiol UV coating, which can simultaneously achieve dual protection of insulation and fire prevention. Protection for new energy vehicle power battery pack modules

Intelligent Adaptation Period: Breakthrough in low-energy curing technology, incorporating self-healing molecular design, compatible with heat-sensitive substrates. Precise coating of solid-state battery tabs

II. Market Landscape: Global Competitive Situation under High Growth

1. Market size and growth potential

From a global market perspective, the market size of UV dielectric coatings for battery packs reached US$350 million in 2024. According to industry forecasts, this size will grow to US$2.036 billion by 2031, with a compound annual growth rate (CAGR) of up to 28.6%, indicating strong growth momentum;

As a core producing country, China’s production capacity accounts for over 40% of the global total: In 2024, domestic UV battery paint production was approximately 6,200 tons, with core suppliers including leading power battery enterprises such as CATL and BYD, providing a solid downstream demand support for the industry chain.

2. Analysis of the focus of competition in the industrial chain

Upstream: High technical barriers for core raw materials: International giants such as BASF and Covestro have monopolized the key raw material market through patent layout. For example, Covestro’s bio-based resin (with a bio-based content of 83%) and IGM’s low-migration photoinitiator (with a migration amount of only 0.01μg/cm²) both represent the highest technological level in the current industry;

Midstream: Domestic enterprises achieve technological breakthroughs: Domestic enterprises accelerate their pursuit. Jiangsu Sanmu Group has achieved localization of TPGDA (trimethylene glycol diacrylate) through process innovation of “segmented temperature control”, reducing costs by 35% compared to imported products. The lignin-based diluent developed by Changchun Renrui Biotechnology has successfully entered the BMW supply chain, breaking the monopoly of overseas enterprises;

Downstream: The trend of application substitution is evident: companies such as BMW and Huawei have gradually replaced traditional PET blue film with UV coatings. The industry substitution rate has reached 35% in 2024, and it is expected that the substitution space will further expand in the future.

III. Future Trends: Technological Deepening and Industrial Ecosystem Construction

Multifunctional integration: Emphasis is placed on developing an integrated composite coating that combines “flame retardant, thermal conductivity, and self-healing” properties. This can reduce the process steps for protecting power batteries by over 30%, significantly reducing production complexity;

Environmental protection attribute upgrade: The proportion of bio-based raw materials in UV battery coatings will increase from the current 20%-30% to 50% by 2031, reducing the carbon footprint of the coating throughout its entire life cycle by 40%, aligning with the global “dual carbon” goals.