Scientific Development Research

Under the backdrop of the dual-carbon goal and the accelerated transformation of the energy structure, how to improve the energy efficiency level during the charging process of electric vehicles has become an important direction in the research of smart energy systems. The 7-kilowatt household charging gun driven by photovoltaics, as a key node for the integration of distributed energy consumption and transportation electrification, its energy efficiency optimization not only relates to the economic costs of electric vehicle users, but also directly affects the utilization efficiency of renewable energy and the dynamic balance of grid load. In response to the mismatch between the intermittency of current photovoltaic power generation and the randomness of electric vehicle charging, this paper, based on the "energy capture" concept, constructs an intelligent energy management model centered on photovoltaic priority, energy storage coordination, and grid leveling. It systematically analyzes the working mechanism, dynamic scheduling strategies, and energy efficiency improvement paths of the 7-kilowatt charging gun in the photovoltaic storage charging scenario, aiming to provide technical support and theoretical basis for the construction of a green, efficient, and intelligent home charging system.

Smart grid; Photovoltaic drive; 7-kilowatt charging gun; Energy efficiency improvement