Shandong Jiuli Electronic Technology Co.

Zaozhuang, China

Shandong Jiuli Electronic Technology Co.

Zaozhuang, China
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Huang W.,Shandong University | Cheng Y.,Shandong University | Cao H.,Shandong University | Wang H.,Shandong Jiuli Electronic Technology Co.
Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | Year: 2013

To lower EV energy consumption, the optimal matching of battery pack, driving motor and transmission system parameters of power-train was carried out based on car design index and city road conditions. The driving cycle of Jinan city was tested with pure electric microbus to contour the ordinary EV running conditions. A 7.5 kW AC asynchronous motor and a 192 V/100 A·h LiFePO4/C battery pack for the power-train were analyzed by consideration of car design index, battery pack voltage and mass effect on energy consumption. The efficiency characteristics of the driving motor, the battery pack, the matching character were determined by the EV test bench. The matching relationship between the electrical power driving system and the mechanical transmission system was measured by chassis dynamometer and optimized to suit for most EV common driving conditions. The results show that the EV endurance mileage reaches 169 km under 40 km·h-1 by constant speed metering method. Under the basic urban driving cycle, the endurance mileage reaches 160 km with energy consumption of 12.01 kW·h/100 km.


Huang W.,Shandong University | Cheng Y.,Shandong University | Wang H.,Shandong Jiuli Electronic Technology Co. | Li C.,Jinan Electrical Vehicle Operation Co.
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | Year: 2012

The coloumbic efficiency, open circuit voltage, and voltaic efficiency of a 320 V/100 A·h LiFePO 4/C battery pack was tested using a battery's test bench, and the relationship between the battery efficiency and the current and state of charge (SOC) was established. A quadratic model was developed to describe efficiency of the battery pack by ordinary least squares. The comparison results between the modeling results and real measured values indicate that the model is valid and the maximum relative error is within 0.8% at some typical points according to a real vehicle.


Huang W.,Shandong University | Cheng Y.,Shandong University | Li C.,Jinan Electrical Vehicle Operation Company Ltd | Zhang X.,Jinan Electrical Vehicle Operation Company Ltd | Wang H.,Shandong Jiuli Electronic Technology Company Ltd
Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | Year: 2012

To optimize vehicle control process according to optimal efficiency of motor system, the relationship of motor efficiency versus motor speed and torque was established. The experimental research was curried out under the work conditions measured from a real vehicle, and efficiency characteristics of the motor were obtained through a bench test. The results show that the motor system efficiency over 80% can be achieved within the range of 77.1% testing area. Electric motor efficiency data were fitted by Ordinary Least Squares (OLS). A quartic function was selected to describe the efficiency of the motor system based on the accuracy of fitting results and calculation complexity. The simulation was validated by the measured results which were obtained at full load characteristics of electric motor. The maximum relative error of 3.9% indicates that the function or model is reasonable. The proposed model can provide basis for optimizing vehicle control strategy based on the best efficiency of motor system.

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