Power Distribution Strategy for Electric Vehicle Hybrid Power System
Xia Chen, Xinru Wang, Jinying Li, Di Wang, Yang Gao
Available Online April 2019.
- https://doi.org/10.2991/icmeit-19.2019.116How to use a DOI?
- electric vehicles; lithium battery; Super-capacitor; hybrid power system; adaptation; power distribution.
- Aiming at the load power fluctuates greatly during the driving process of the electric vehicles, a large load current is required, it is difficult to meet the load demand by the lithium battery alone, so the super-capacitor is introduced. In order to give full play to advantages of both, and to reduce the transient high current fluctuation of lithium battery, a power allocation strategy based on adaptive frequency is proposed. The power supply current, super-capacitor and bus voltage are controlled with double closed-loop control, and the filter time constant is dynamically adjusted according to the state of charge and load requirements of the super-capacitor, the battery bears the low-frequency component of the load current, and the super-capacitor provides the residual component, therefore, the charge and discharge current of the battery can be reduced and reducing the large current fluctuation. The Matlab/Simulink the results show that the method fully utilizes the super-capacitor smooth load fluctuation, which effectively reduces the charge and discharge current of the lithium battery and reduces the fluctuation range, thus prolonging the service life.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Xia Chen AU - Xinru Wang AU - Jinying Li AU - Di Wang AU - Yang Gao PY - 2019/04 DA - 2019/04 TI - Power Distribution Strategy for Electric Vehicle Hybrid Power System PB - Atlantis Press SP - 727 EP - 735 SN - 2352-538X UR - https://doi.org/10.2991/icmeit-19.2019.116 DO - https://doi.org/10.2991/icmeit-19.2019.116 ID - Chen2019/04 ER -