Summary of BYD's Second-Generation Battery Fast Charging Technology Conference Call Industry and Company Involved - **Company**: BYD (Build Your Dreams) - **Industry**: Electric Vehicle (EV) Battery Supply Chain Key Points and Arguments 1. Battery Core Components - **Cathode Materials**: - **Fengyuan Co., Ltd. (002805)**: Exclusive supplier of high-pressure lithium iron phosphate for BYD's fast-charging battery, involved in joint R&D and exclusive adaptation [1] - **Defang Nano (300769)**: Core supplier of lithium manganese iron phosphate, supporting the second-generation blade battery's high rate and energy density improvements [1] - **Hunan YN Energy (301358)**: Leading supplier of lithium iron phosphate cathodes, deeply integrated with BYD, benefiting from the ramp-up of fast-charging batteries [1] 2. Electrolytes and Separators - **Tinci Materials (002709)**: Leading supplier of high-rate electrolytes, utilizing LiFSI technology to reduce internal resistance, suitable for fast-charging needs [1] - **Enjie Co., Ltd. (002812)**: Supplier of ultra-thin wet separators (4μm), enhancing ionic conductivity and ensuring fast charging stability [1] 3. Structural Components and Equipment - **Kodali (002850)**: Core supplier of blade battery casings, meeting the structural requirements of the second-generation short blade and high-rate designs [1] - **Haimeixing (688559)**: Provides laser equipment for the second-generation blade, covering the entire process from electrode processing to welding, with BYD as its second-largest customer (approximately 15% of revenue) [1] - **Lianying Laser (688518)**: Main supplier for cell/PACK laser welding, utilizing blue laser technology for copper-aluminum welding, with a high market share [1] 4. Onboard High Voltage and Control - **Silicon Carbide Chips**: - **San'an Optoelectronics (600703)**: The only domestic company with a full silicon carbide supply chain, providing automotive-grade SiC chips for high-voltage fast charging and efficient energy conversion [1] - **Tianyue Advanced (688234)**: Holds a 25% global market share in silicon carbide substrates, entering BYD's supply chain to support SiC chip production [1] 5. High Voltage Connectors and Charging Guns - **Yonggui Electric (300351)**: Validated 1000V liquid-cooled high-voltage connectors and charging guns by BYD, with a single vehicle supply value of approximately 1200 yuan [1] 6. Onboard Power Modules - **Xinrui Technology (300745)**: Supplier of high-power charging SCM super-fast charging modules, suitable for megawatt fast-charging high-voltage platforms [1] 7. Charging Infrastructure - **Ultra Charging Piles and Power Modules**: - **XJ Electric (000400)**: Awarded the first batch of megawatt fast charging station equipment by BYD, providing 600kW liquid-cooled ultra charging piles [1] - **Shenghong Co., Ltd. (300693)**: Signed a strategic agreement with BYD for core power modules of megawatt charging stacks [1] 8. Charging Modules and Power Supplies - **Yingkerui (300713)**: Supplier of 1000V efficient power modules, achieving a conversion efficiency of 98.5%, supporting peak power output [1] Core Conclusions - **Key Certainties**: Exclusive long-term agreements for cathode materials, exclusive adaptation of laser equipment, and full-chain support for SiC chips [1] - **Leading Suppliers for Fast Charging Components**: Tinci Materials (electrolytes), Enjie Co., Ltd. (separators), Yonggui Electric (high-voltage connectors), and XJ Electric (ultra charging piles) [1]