Abstract
In order to shorten the wireless charging time of electric vehicles (EVs) and achieve stable charging, an adaptive smart control method for EV wireless charging is proposed in the paper. The method dynamically tracks the rechargeable battery state during the whole charging process, realizes multi-stage charging of constant current (CC) or constant voltage (CV) by switching two kinds of compensation networks of bilateral L3C and L3C-C, and regulates the charging voltage and current to make it as close as possible to the battery charging characteristic curve. This method can be implemented because the voltage source connected to the coupler and the compensation networks of bilateral L3C and L3C-C have the CC and CV source characteristics, respectively. On the basis of the established adaptive smart control system of EV wireless charging, the experiments of wireless data transmission and adaptive smart charging were conducted. The results showed that the designed control system had a response time of less than 200 ms and strong anti-interference ability and it shortened the charging time by about 16% compared with the time using traditional charging methods, thereby achieving a fast, stable, safe, and complete wireless charging process.
Highlights
In order to verify the real time, rapidity and stability of the control system, this section presents the Electric vehicles (EVs) wireless charging adaptive smart control system, which consists of a STM32 series single-chip the EV wireless charging adaptive smart control system, which consists of a STM32 series single-chip microcomputer (STM32F103 and STM32F407), a WiFi module, a vehicle battery, a high-frequency microcomputer (STM32F103 and STM32F407), a WiFi module, a vehicle battery, a high-frequency power supply, and an electromagnetic coupler
The authors of this paper present an adaptive smart control system for EV wireless charging
The authors of this paper present an adaptive smart control system for EV wireless charging systems
Summary
Electric vehicles (EVs) have the advantages of green environmental protection and zero emissions, and they have become one of the main directions for the development of new energy vehicles [1,2,3].EV wireless charging, compared with wired contact charging, eliminates the dependence on the wire and can solve the following problems in the wired charging [4,5]: (i) because the voltage or current of the battery pack is large, contact charging generates sparks when the plug is in contact, which may cause safety problems; (ii) contact charging may cause short circuiting or current leakage in weather such as rain or snow; (iii) it is difficult to achieve automatic charging due to manual operation of the charging; and (iv) the location of the charging system is not flexible enough. Wireless charging technology for EVs has become one of the focuses of relevant scientific researchers and industrial personnel in recent years. The EV terminal sends the real-time battery state information to the intelligent controller through wireless communication. The controller determines the compensation network topology and the charging voltage according to the state of the battery. The electromagnetic energy is wirelessly transferred from the transmitting coil to the receiving coil and charges the battery after rectification and filtering
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