Design and evaluation of a piezoelectric energy harvester using asymmetric clamping to improve output performance

This paper proposes a piezoelectric energy harvester using asymmetric clamping to improve output performance. The piezoelectric ceramics have a greater degree of deformation and a shorter response time during squeezing under the effect of the rectangular baffles, resulting in a higher voltage output than that from the structure without baffles. When the piezoelectric beams have rectangular baffles on both sides and the length is 8 mm, the prototype provides a high output voltage over a wide range, and the open-circuit peak-peak voltage is 60.8 V, which is 3.49 times that of the structure without baffles. The strength of the prototype and its feasibility in practice are verified by observing the brightness of the same number of LEDs; it shows great promise for powering microelectronic devices.