新国标对电池热管理要求升级，高管称设计是影响安全的主因

Core Viewpoint - The rapid development of the electric vehicle industry is accompanied by safety concerns, particularly regarding battery thermal runaway, which is primarily caused by high temperatures and overcharging. Advanced battery thermal management systems are essential for ensuring safety [1]. Group 1: Battery Thermal Management Systems - The design phase of battery thermal management systems is critical, requiring simulations to ensure uniform cooling across all cells and complete sealing to prevent liquid contact with cells [1]. - Common issues arise from client-provided module and cell designs, leading to ineffective thermal management, particularly in corner cells due to design flaws [1]. - Safety in battery thermal management relies on design, materials, and technological innovation, with design being the most significant factor, especially under high load conditions [1]. Group 2: New National Standards - In March, the Ministry of Industry and Information Technology released new safety requirements for electric vehicle batteries, mandating that batteries must not catch fire or explode, with new tests for bottom impact and fast charging cycles to be implemented by July 2026 [2]. - This new standard is expected to drive companies to redesign battery pack structures and thermal management systems, promoting high-quality development in the industry and potentially leading to a "stronger gets stronger" market dynamic [2]. Group 3: Material Selection and Cost Implications - The new national standard will not affect existing solutions but will require the selection of appropriate materials, with changes in the chemical composition of thermal management circuit liquids [3]. - For lower temperature requirements, cheaper materials are sufficient, but higher performance materials will increase costs, with immersion cooling systems potentially costing about 25% more than traditional systems [3]. Group 4: Industry Response and Opportunities - Several battery companies, including BYD, Xinwanda, Guoxuan High-Tech, and CATL, have announced that their products meet or exceed the new national standards [4]. - The new standards are expected to promote safety upgrades in the battery industry, leading to optimization in thermal management and liquid cooling systems, as well as improvements in lithium battery material thermal stability [4]. - Solid-state batteries, viewed as the next generation of technology with higher safety performance, require more efficient thermal management designs due to the low thermal conductivity of solid electrolytes, with material costs for thermal management systems being 10% to 15% higher [4].