With the transformation of the global energy structure and the advancement of carbon emission control，the large-scale popularization of electric vehicles has put forward higher requirements for high-power power batteries and charging infrastructure. However， the existing technologies have problems such as low energy transmission efficiency，high security risks and poor protocol adaptability. The article aims to integrate high-power power battery and charging pile technologies and propose system integration optimization strategies. By elaborating the key technologies of the power system of electric vehicles， high-power power batteries and the theoretical basis of the charging pile system， the integrated design is carried out from three aspects： dynamic adaptation of the charging interface， dynamic power cooperative control， and the design of the thermal management coupling system. A hierarchical defense security protection system is constructed， and the integration of standardized charging protocols is realized by using the programmable protocol conversion gateway. Build a full life cycle intelligent operation and maintenance management platform and improve the operation and maintenance technical system. The research results are conducive to enhancing the cycle life of power batteries，optimizing the utilization rate of charging facilities，and providing theoretical references for the sustainable development of the electric vehicle industry.