电动汽车无线充放电技术是电动汽车充放电领域的研究热点之一。本项目拟以磁耦合谐振式无线电能传输技术为基础，结合电动汽车充放电特性，围绕能量双向拾取与推送变换、系统优化与控制等关键问题开展研究。其中针对能量的双向拾取与推送问题，提出一种对等拓扑的解决方案，构建能量动态分配模型，实现能量双向拾取与推送的一体化设计；针对双向耦合器件容偏率低的问题，研究并提出一种新型双向耦合器，有效提高系统的容偏率与转换效率；针对电池充放电过程中阻抗动态变化问题，提出一种电池等效阻抗的动态监测与匹配方法；针对能量收发端协调控制困难问题，利用前后端系统间的约束关系，建立系统观测模型，并给出相应控制策略。本项目的研究将有利于解决电动汽车能量无线双向馈送中的关键问题，实现电动汽车与电网能量的无线双向高效馈送，从而有效的推动电动汽车无线充放电技术的发展，为电动汽车与电网的有效互动提供新的解决思路，提高与电网的交互能力。

Electric vehicles wireless charging and discharging technology is a hotspot in electric vehicle charging and discharging field. This project, regarding the magnetic coupling resonant wireless power transmission technology and with the characteristics of electric vehicle charging and discharging, plan to research the key problems such as energy bi-directional pick up and push transformation, system optimization and control. In this project, for the energy bi-directional pick up and push transformation, an equivalent topology solution is presented, and energy dynamic distribution model is built to realize the integration design of energy bidirectional pick up and push. For the problem of low tolerance deviation rate of the bi-directional coupler, a new kind of bi-directional coupler is proposed to improve the tolerance deviation rate of the system and the conversion efficiency effectively. For the problem of the dynamic change of the impedance during the battery charge and discharge, a dynamic monitoring and matching method of equivalent impedance of battery is presented. For the difficulty of information interaction between transmitter and receiver, using the constraint relation between the front and the end, observation model of the system is set up, and corresponding control strategy is given. The research results of this project is helpful to solve the key problem in the electric vehicles energy wireless bi-directional feed, and realize wireless energy bi-directional feed effectively between the electric vehicles and grid. The development of electric vehicle wireless charging and discharging technology will be promoted effectively and a new solution for the effective interaction between electric vehicles and grid will be provided.