Performance of a speed bump piezoelectric energy harvester for an automatic cellphone charging system

Gyeong Ju Song, Kyung-Bum Kim, Jae Yong Cho, Min Sik Woo, Jung Hwan Ahn, Jong Hyuk Eom, Sung Min Ko, Chan Ho Yang, Seong Do Hong, Se Yeong Jeong, Won Seop Hwang, Sang Bum Woo, Jeong Pil Jhun, Deok Hwan Jeon and Tae Hyun Sung

Applied Energy, 2019, vol. 247, issue C, 227 pages

Abstract: We propose a piezoelectric energy harvesting technology installed in a roadway speed bump. We have installed a module that can charge mobile phones utilizing a speed bump piezoelectric harvester (SBPH), which is easy to apply to roads. A highly integrated module with 40 piezo-generators was fixed and installed at the center of the speed bump. When a medium-sized vehicle passed the module at a speed of 30 km/h, an output voltage of 144 Vmax, output current of 45.2 mAmax, and output power of 4086.08 mWmax (6.81 W/m2) were measured at a load resistance of 2 kΩ. When the vehicle passed over the SBPH nine times, it charged a capacitor (10,000 μF) to provide 6 V for about 200 s, and the charged electrical energy was enough to operate a cellphone. The self-controlled battery charging system via electricity generated by the piezoelectric module could be applied to a speed bump installed on an actual road.

Keywords: Speed bump; Road-capable piezoelectric energy harvester; Autonomous charging cellphone; Vehicle; Actual road (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (16)

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DOI: 10.1016/j.apenergy.2019.04.040

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