电动汽车动力蓄电池无线充电技术的智能化研究-电气工程专业论文.docxVIP

电动汽车动力蓄电池无线充电技术的智能化研究 INTELLIGENCE RESEARCH ON WIRELESS CHARGING OF ELECTRIC VEHICLE’S POWER BATTERIES ABSTRACT There are two kinds of charging technologies for electric vehicle’s power battery pack: contact charging and non-contact charging. As contact charging has harsher environment demands, potential hazard and the lower level efficiency,this paper adopting non-contact charging to realize wireless power transmission for electric vehicle. Through this way, the charging system have no any physical connection with electric car but electrical connection, finally,improving the safety factor,what is more,we can use the small volume,long-life battery back to solve the traditional question about accumulator capacity,As a result, the safety of the batteries will be greater however the price of battery pack will be cheaper. This paper use WiTricity technology which base on the principle of magnetic field’s resonant coupling to charge power batteries.This paper present the principle of WiTricity firstly,then design and simulation the circuit of primary system and secondary circuit.In the end,we can make sure it is feasibility that applying WiTricity to EV’s charging. Because of the worse operational condition of cars,we must monitor and know the conditions of battery pack realtime,optimize charging and discharging performance,prolong the life,improve efficiency and reliability of battery pack. This paper build the Battery Management System (BMS) with one 12V \ 7Ah lead-acid battery, 51 SCM control core and the intelligent monitoring chip ds2438. This BMS is composed of information collecting subsystem and battery’s charging control subsystems. According to the result of information collecting subsystem, the battery’s charging control subsystem regulate charging parameter realtime. This paper adopt three-stage charge 216V\70Ah power battery pack:constant current charging first, constant voltage charging second, trickle charging in the end.At last,we will realize the intelli