太阳能光伏驱动车载散热通风系统

Automotive cooling ventilation system driven by solar photovoltaic cell

文中设计一种太阳能光伏电池驱动的车载散热通风系统,采用光伏电池、SEPIC变换器、蓄电池和BUCK变换器的并联结构,由一片DSC芯片实现系统的功能控制与能量管理,实现光伏电池驱动车载风扇降温和为汽车蓄电池充电的双重功能。系统通过DSC芯片控制SEPIC变换器来改变光伏电池的负载特性曲线,使得环境因素变化时负载始终与电池外特性曲线相交于最大功率点,实现最大功率追踪;另外DSC芯片实时检测车内温度,控制散热风扇的转速,排出车内热空气,达到控制车内温度的效果;散热风扇运转功率来自光伏发电,且光伏发电多余电能为车载蓄电池充电。该设计提高了车辆的舒适性,具有一定节能减排的效果。通过Simulink仿真和实验验证了该设计的可行性和控制策略的有效性。

A kind of automotive cooling ventilation system driven by solar photovohaic （PV） cell is designed in this paper. Parallel connection structure of PV cell, SEPIC converter, storage battery, and BUCK converter is employed. The function control and energy management is realized by a DSC chip, which helps to achieve dual function of driving automotive fan to cooling by PV cell and charging storage battery. SEPIC converter is controlled by the DSC chip to change the load characteristic of PV cell, ensuring that the intersection with the external characteristic of PV cell is always the maximum power point for MPPT. In addition, in-car temperature should be detected real-time to control the rotating speed of cooling fan for exhausting heat inside the car. The service power of cooling fan is from PV cell, and the redundant electric energy is used for charging storage battery. The proposed design improves the comfort of the vehicle, and also makes a contribution for energy conservation and emissions reduction. The simulation and experimental results verified the correctness and feasibility of the system design and the control strategy.