Generating apparatus using piezoelectric ceramics

Abstract

The present invention provides a generating device which adopts piezoelectric ceramic for power generation. The device comprises a piezoelectric ceramic, an electrical energy converting and storing circuit which is connected with the piezoelectric ceramic, and a chip of power generating unit which consists of more than two pieces of piezoelectric ceramics which are piled together; the chip of power generating unit is coated by elastic material to form the power generating unit which is slim or flatly long; one end of the power generating unit is connected with the electrode of the pole of each piezoelectric ceramic, and the other end is provided with a force bearing device which is used for receiving the external acting force; the device also comprises a substrate; the power generating unit is installed on the substrate; the substrate is provided with an electrical energy converting and storing circuit which is used for connecting the electrode of each power generating unit; wherein, the power generating unit has bending or twisting deformation when being influenced by the external force, so that the extrusion between the piezoelectric ceramics can generate power. Therefore, the device has no rotating or moving mechanism, no potential of damage caused by abrasion and other motions, but low manufacturing cost.

Description

technical field [0001] The invention relates to a device for generating electricity using piezoelectric ceramics, which belongs to energy collection technology or electronic technology. Background technique [0002] Applying a mechanical force to some dielectrics causes the relative displacement of their internal positive and negative charge centers, resulting in polarization, which leads to the appearance of bound charges of opposite signs on the surfaces of the two ends of the medium. Within a certain stress range, the relationship between mechanical force and electric charge is linear and reversible. This phenomenon is called piezoelectric effect or positive piezoelectric effect. Ceramics with piezoelectric effect are called piezoelectric ceramics. The spontaneous polarization of ferroelectric ceramics without polarization treatment is randomly oriented, so there is no piezoelectricity. After polarization treatment, the spontaneous polarization is preferentially oriented...

AI Technical Summary

Problems solved by technology

[0003] In view of the above deficiencies, the technical problem to be solved in the present invention is how to avoid the use of rotating parts in the device using piezoelectric ceramics to generate electricity, so as to propose a device that uses piezoelectric ceramics to generate electricity that is not easy to damage and low in cost

Images