The reason why piezoelectric ceramics can generate electricity is that there is a permanent spontaneous polarization in each tiny grain of this kind of ceramics. Under the action of a strong external electric field, they will be arranged neatly along the direction of the electric field, making the whole crystal polar. They can induce electrical phenomena externally under the change of stress or temperature. The greater the external stress, the higher the change frequency, The higher the generating power is, the higher the energy conversion efficiency can be obtained at the resonance frequency. When a piezoelectric power supply with high voltage and low current is required, block piezoelectric ceramics can be selected; When a piezoelectric power supply with low voltage and high current is required, thin piezoelectric ceramic integration can be selected. At present, it is reported that various products have been used for various types of charging power supply. It is characterized by small volume, light weight and can be carried with you, especially in high mountain areas or desert areas without power supply. It can use all kinds of mechanical power to store power for power generation, free from the influence of magnetic field and nuclear radiation, and not aging.
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Piezoelectric ceramic power supply has great application prospects in harsh environment