What Is The Application Prospect Of LFT Materials in The Battery Casings Of New Energy Vehicles?

LFT materials, with their core advantages of lightweighting, multifunctional integration, and policy compatibility, are becoming a key development direction for battery casing materials for new energy vehicles. Their application prospects exhibit the dual characteristics of "technological breakthroughs driving demand expansion, while cost optimization accelerates substitution penetration." This can be analyzed from four perspectives: market potential, technological evolution, competitive landscape, and challenges to overcome.

1. Market Growth Potential: Driven by Both Policy and Demand

The explosive growth of the new energy vehicle industry has created a vast market for LFT materials in the battery casing sector. By 2024, China's LFT market size was projected to reach 12.86 billion yuan, with demand from the new energy vehicle sector accounting for over 18%, and growth rates consistently exceeding the industry average.

From the demand side, China's new energy vehicle production is projected to increase by 33.3% year-on-year in 2024. As a core safety component, battery casings face increasing demands for lightweighting and safety. Compared to traditional aluminum alloy casings, LFT materials can reduce weight by 30%-35%, and the integrated molding process reduces the number of parts, meeting the dual needs of new energy vehicles for improved range and optimized production efficiency. It is estimated that by 2025, the proportion of LFT applications in the automotive sector will rise to 61%, with growing demand for core components such as battery casings being the primary driver. The market size is expected to exceed 2.7 billion yuan.

II. Technological Evolution: Performance Upgrades and Process Innovation

Technological breakthroughs in LFT materials are addressing the stringent safety and stability requirements of battery casings, primarily demonstrating three key development trends:

1. High-Performance Modification Breakthroughs: Through matrix optimization and fiber reinforcement technology upgrades, LFT material performance continues to improve. By 2024, domestically developed LFT materials had achieved a tensile strength of 210 MPa and a heat deformation temperature exceeding 140°C. These strengths are expected to further increase to 220 MPa and above 150°C by 2025, meeting the demands of battery casings under extreme operating conditions such as high temperatures and impact. For example, PC+LFT-D composite materials, with their excellent flame retardancy and dimensional stability, can enhance the airtightness of battery packs and reduce safety risks during long-term use.

2. Functional Integration Design: LFT materials integrate heat dissipation, insulation, and other functions through an integrated molding process, reducing the number of assembly steps required for housings. Compared to traditional metal housings that require an additional insulation layer, LFT housings directly provide insulation performance. Furthermore, optimized fiber distribution improves impact resistance, meeting the requirements for corrosion protection and low-temperature impact resistance (-25°C) for battery housings.

3. Process Innovation and Cost Reduction: The intelligent upgrade of the D-LFT (Direct-in-Line Fertilization) process enables real-time control of fiber dispersion uniformity, reducing scrap rates by over 30%, and driving down LFT housing production costs. Furthermore, the combination of 3D printing technology and LFT enables small-batch customization of complex housing structures, shortening production cycles by over 50%, making them suitable for high-end and specialty vehicles.

III. Competitive Landscape and Application Cases

Current competition in the LFT material battery housing market is characterized by a "dominant presence of leading companies and deepening industry chain collaboration." For example, a domestic electric vehicle uses LFT-modified polypropylene battery carriers, achieving a 30% cost reduction while maintaining strength. Brands like NIO are piloting the use of carbon fiber-reinforced LFT housings, achieving significant weight reduction, but currently, due to cost constraints, this has yet to be widely adopted.

By material type, long glass fiber-reinforced LFT (LGF) currently dominates, with a market size projected to reach 10.78 billion yuan in 2025. Long carbon fiber-reinforced LFT (LCF), due to its superior performance, is experiencing significant growth in high-end vehicle applications, with a market size projected to reach 3.54 billion yuan. Compared to aluminum alloy housings, LFT materials offer potential cost advantages. With capacity expansion and process optimization, their cost-performance ratio will further improve, accelerating the replacement of metal materials.

IV. Challenges and Breakthrough Paths

Despite its promising prospects, LFT materials still face three major challenges in battery housing applications, requiring breakthroughs through technological innovation and industry collaboration:

1. Balancing performance and cost: While carbon fiber-reinforced LFT offers excellent performance, it is relatively expensive and is currently primarily used in high-end vehicles. In the future, costs will need to be reduced through bio-based resin substitution (such as PLA) and improved recycling systems (targeting a recycling rate of over 80%). Meanwhile, the performance of glass fiber-reinforced LFT will be enhanced to expand its application in mid-range vehicles.

2. Improvement of standards and certification systems: Battery casings are crucial to vehicle safety. Currently, standards for flame retardancy and weather resistance of LFT materials are not fully standardized. The industry needs to collaborate with automakers and testing agencies to establish dedicated standards, promote international safety certification for LFT casings, and accelerate market adoption.

3. Development of recycling and environmental protection systems: As LFT applications expand, the recycling of waste casings becomes crucial. The maturity of physical comminution and chemical depolymerization technologies will enable LFT materials to achieve a closed "production-recycling-remanufacturing" cycle, aligning with the green development trend of new energy vehicles and enhancing the competitiveness of the material throughout its lifecycle.