在新能源汽车产业快速发展背景下，电池热管理系统（Battery Thermal Management System， BTMS）的性能是决定电池安全性与整车综合表现的核心因素。针对传统系统集成度低、协同控制差、能量效率不足等痛点，本文研发集成5.5 kW 变频器、1 .5 kW 可调压直流/ 直流（Direct Current/Direct Current，DC/DC）电源、24 kW 高效正温度系数（Positive Temperature Coefficient，PTC）驱动模块及中央控制单元（Central Control Unit，CCU）于一体的四合一电控系统。通过集成化结构设计、智能协同控制策略与云智控平台技术融合，实现电池温度实时监测、精准调控与全生命周期管理。实车验证表明：该系统具备高集成、高可靠、小型化、轻量化优势，温度控制误差≤±0.5 ℃，能效比提升31% 以上，有效降低热失控风险，为新能源汽车核心零部件自主可控提供技术支撑。

Under the background of the rapid development of the new energy vehicle industry,the performance of the battery thermal management system has become the core factor determining the safety of the battery and the overall performance of the vehicle. In response to the shortcomings of traditional systems such as low integration, poor coordination, and insufficient energy efficiency, this article has developed a four-in-one electronic control system integrating a 5.5 kW frequency converter, a 1.5 kW adjustable voltage DC/DC power supply, a 24 kW high-efficiency PTC drive module, and a CCU controller. Through the integration design, intelligent control strategy, and the integration of cloud intelligent control platform technology, real-time monitoring of battery temperature, precise regulation, and full life cycle management are achieved. Real vehicle verification shows that this system has the advantages of high integration, high reliability, small size, and lightweight, with a temperature control error of ≤±0.5 ℃ , and an energy efficiency improvement of more than 31%, effectively reducing the risk of thermal runaway, and providing technical support for the independent control of core components of new energy vehicles.