压电发电能量储存方法的初步研究

Initial Research on the Method of Storage for Piezoelectric Energy Harvesting Devices

分析了压电陶瓷正压电效应的特点,探讨了将压电陶瓷通过正压电效应产生的电能,利用镍氢电池储存的可行性,进行了初步实验研究。研究发现,通过一个低频脉冲信号激振单晶片压电振子,使压电振子弯曲变形,压电振子发出的电量能使一个15 mAh的电池在2 h内充满电,80 mAh的电池在7 h内充满电。这种利用可充电电池为储存媒介的储能方法,适用于数据处理等微电子设备,对无源条件下微型电子设备自身供能的研究开辟了新的途径。

Piezoelectric materials have a crystalline structure that provides a umque ability to convert an applied electrical potential into a mechanical strain or vice versa, or convert an applied strain into an electrical current. Using the latter of these two properties this paper investigates the ability to use this energy from the piezoelectric to charge a discharged battery. It is found that the power output by a piezoelectric material is capable of recharging a discharged battery. With a low-frequency excitation of a piezoelectric plate, it is demonstrated that a 15 mAh battery can be charged in less than two hours and 80 mAh battery can be charged in less than seven hours. The finding that piezoelectric materials can be utilized for recharging batteries opens the way fowards most micro-electro-mechanical systems,in which power can be supplied by self.