基于参数辨识的锂离子电池无线充电技术

Wireless charging of lithium-ion battery technology based on parameter identification

针对感应模式无线电能充电系统中输出控制问题,增加了参数辨识环节,实现了对原边线圈的电压电流相位的实时检测,使Buck变换器根据辨识参数结果控制输出电压,有效地克服了传统控制方法需要两个控制器以及原副边需要通信的弊端,简化了系统的设计,提高了系统的可靠性。最后制作了一个感应模式锂离子电池无线电能充电装置并进行了试验测试,测试结果验证了参数辨识控制技术的有效性。研究结果表明,相对于传统的通讯控制方法,该辨识控制方法控制效果好,电能传输效率高。

Aiming at the output control of the wireless charge system based on electromagnetic induction, a parameter identification unit was applied to measure the voltage, current and the phases of them on the primary coil. The output voltage of the wireless charge system was con- trolled by the Buck converter according to the result of the parameter identification. The disadvantages of the traditional system efficiently were overcome, in which the two controllers and the communication between the primary side and secondary side were used. The wireless charge system was simplified and the reliability of the system was improved. Then a setup of the wireless charge system with the parameter identification unit for charging the lithium battery was built to verify the design. The experimental results verify the effectiveness of the control parameter identification technology. The results indicate that the charge efficiency of the identification control method is higher than that of the traditional control method with the communication.