A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy...A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy and mechanical energy through the water evaporation process, and the supercapacitor can be charged simultaneously. The former offers stable electrical power as output, whereas the Ppy- based supercapacitor shows a capacitance of 12.497 m F/cm^2 with 96.42% retention after 4,000 cycles. After filling the power unit with water as the fuel, it can be fully charged in about 20 min. The power unit can be flexibly integrated with electronic devices such as sensor nodes and wireless transmitters employ- ing the Internet of Things. This new approach can offer new possibilities in continuous future operation of randomly distributed electronic devices incorporated in the Internet of Things.展开更多
随着电动汽车技术的发展和综合性能要求的提高,辅助能量系统(Auxiliary power units,APUs,例如,空调系统、动力转向系统、制动系统、发动机冷却系统等)在混合动力汽车中发挥着愈来愈重要的作用。研究辅助能量系统在车辆行驶过程中的能...随着电动汽车技术的发展和综合性能要求的提高,辅助能量系统(Auxiliary power units,APUs,例如,空调系统、动力转向系统、制动系统、发动机冷却系统等)在混合动力汽车中发挥着愈来愈重要的作用。研究辅助能量系统在车辆行驶过程中的能量流变化,可进一步完善整车的综合能量流管理。分析APUs的工作特点,提出基于能耗map图的仿真思路,通过对ADVISOR软件的二次开发,设计APUs的仿真模型,分别建立传统公交车、串联混合动力和并联混合动力城市公交车的综合能量流模型,完善了传统汽车及HEV的仿真模型。在此基础上对APUs对整车经济性的影响进行仿真研究,仿真研究结果表明,电动汽车附件系统在整车能耗上占有相当的比重,在美国城市循环、ECE循环工况和武汉城市公交车循环工况下,公交车辅助能量附件系统能耗比例最大为10%、最小为6.1%。展开更多
串联式混合动力客车上采用的辅助功率单元(auxiliary power unit,APU)是一个复杂的非线性耦合系统。文中提出了一种APU动态控制器结构,首先根据闭环系统稳定性和跟踪性能试验测试提出了速度和功率耦合PI控制器,进而基于静态试验设计了AP...串联式混合动力客车上采用的辅助功率单元(auxiliary power unit,APU)是一个复杂的非线性耦合系统。文中提出了一种APU动态控制器结构,首先根据闭环系统稳定性和跟踪性能试验测试提出了速度和功率耦合PI控制器,进而基于静态试验设计了APU系统的前馈控制支路。通过台架测试表明,该控制方法能够保证APU动态过程中的转速稳定性和功率的快速调整特性,满足实用要求。展开更多
基金supported by the National Natural Science Foundation of China(11674048)the Fundamental Research Funds for the Central Universities(N170505001,and N160502002)Program for Shenyang Youth Science and Technology Innovation Talents(RC170269)
文摘A self-charging hybrid power unit has been developed by integrating a water-evaporation-induced nano- generator with a flexible nano-patterned supercapacitor. The nanogenerator can harvest environmental thermal energy and mechanical energy through the water evaporation process, and the supercapacitor can be charged simultaneously. The former offers stable electrical power as output, whereas the Ppy- based supercapacitor shows a capacitance of 12.497 m F/cm^2 with 96.42% retention after 4,000 cycles. After filling the power unit with water as the fuel, it can be fully charged in about 20 min. The power unit can be flexibly integrated with electronic devices such as sensor nodes and wireless transmitters employ- ing the Internet of Things. This new approach can offer new possibilities in continuous future operation of randomly distributed electronic devices incorporated in the Internet of Things.
文摘随着电动汽车技术的发展和综合性能要求的提高,辅助能量系统(Auxiliary power units,APUs,例如,空调系统、动力转向系统、制动系统、发动机冷却系统等)在混合动力汽车中发挥着愈来愈重要的作用。研究辅助能量系统在车辆行驶过程中的能量流变化,可进一步完善整车的综合能量流管理。分析APUs的工作特点,提出基于能耗map图的仿真思路,通过对ADVISOR软件的二次开发,设计APUs的仿真模型,分别建立传统公交车、串联混合动力和并联混合动力城市公交车的综合能量流模型,完善了传统汽车及HEV的仿真模型。在此基础上对APUs对整车经济性的影响进行仿真研究,仿真研究结果表明,电动汽车附件系统在整车能耗上占有相当的比重,在美国城市循环、ECE循环工况和武汉城市公交车循环工况下,公交车辅助能量附件系统能耗比例最大为10%、最小为6.1%。
文摘串联式混合动力客车上采用的辅助功率单元(auxiliary power unit,APU)是一个复杂的非线性耦合系统。文中提出了一种APU动态控制器结构,首先根据闭环系统稳定性和跟踪性能试验测试提出了速度和功率耦合PI控制器,进而基于静态试验设计了APU系统的前馈控制支路。通过台架测试表明,该控制方法能够保证APU动态过程中的转速稳定性和功率的快速调整特性,满足实用要求。
