A power generation device based on shape memory alloy and piezoelectric ceramic

A power generation technology that combines shape memory alloy (SMA) and piezoelectric ceramic is proposed. The piezoelectric ceramic is pulled by the deformed SMA to produce a positive piezoelectric effect, which eventually generates electrical energy. The research was conducted through structural design, collection and storage of electrical energy, and experimental verification. The experimental results show that the power generation device has an open circuit voltage of 11.6 V when heated by hot air at 100 °C. The device was used to charge a 1000μF/6.3 V capacitor through the energy harvesting circuit, and the final capacitor voltage was stabilized at about 6 V. •Power generation by positive piezoelectric effect.•Power generation technology of memory alloy combined with piezoelectric oscillator.•A kind of waste heat power generation equipment.