本文解析比亚迪汉 EV 刀片电池能量密度平衡机制：采用长条形单体与无模组化设计，体积利用率达 60%，第一代能量密度为 140Wh/kg，第二代达 190Wh/kg（试验数据 210Wh/kg）；集成直冷式热管理与 BMS 主动均衡，温差 <5℃，循环寿命超 3000 次。实测 -30℃ 续航保持 92%，800V 平台 15min 快充至80%。研究揭示其通过结构优化与智能算法协同，平衡能量密度、安全与寿命，为高能量密度电池设计提供参考。

This study analyzes the energy density balancing mechanism of BYD Han EV's blade battery system:Adopting long strip-shaped cell design and module-free integration, volume utilization rate is significantly improved, with first-generation energy density of 140Wh/kg and second-generation reaching 190Wh/kg (lab data 210Wh/kg). Integrated with direct cooling thermal management and BMS active balancing, the temperature difference is controlled below 5℃ ,and cycle life exceeds 3000 times. Experimental data shows 92% range retention at -30℃ and 800V platform enabling 15-minute fast charging to 80%. The research reveals that through structural optimization with intelligent algorithms, the blade battery achieves balance between energy density, safety, and lifespan, providing references for high-energy-density battery design.