Fold-shaped compound piezoelectric energy converting structure

Abstract

The invention relates to a fold-shaped compound piezoelectric energy converting structure, and belongs to the technical field of piezoelectric energy conversion. The fold-shaped compound piezoelectric energy converting structure is characterized in that: the fold-shaped compound piezoelectric energy converting structure comprises a fold-shaped elastic conductive body of which the arc corner is reinforced with a rigid connecting block (2); the upper and lower surfaces of a horizontal section (1) of the fold-shaped elastic conductive body are respectively adhered with an upper-layer piezoelectric film (4) and a lower-layer piezoelectric film (5) in an equidirectional way; the upper side of the upper-layer piezoelectric film and the lower side of the lower-layer piezoelectric film are adhered with conductive adhesive layers (3); and one electrode end of the fold-shaped compound piezoelectric energy converting structure is led out through the fold-shaped elastic conductive body, while the other electrode end is led out through the conductive adhesive layers. The structure can generate large electric charge output while having large deformation, is firm, saves raw materials, has simple manufacture process, and can be widely applied as an energy transducer to a vibrational energy recovery system.

Description

technical field [0001] The invention relates to a wrinkled composite piezoelectric energy conversion structure, which belongs to the technical field of piezoelectric energy conversion. Background technique [0002] Piezoelectric materials have direct piezoelectric effect and inverse piezoelectric effect, which can convert mechanical energy into electrical energy and electrical energy into mechanical energy. The invention mainly uses the positive piezoelectric effect of the piezoelectric material to convert electromechanical energy. Most of the current autonomous wireless nodes are powered by batteries. However, using batteries in large quantities will cause harm to the environment, and the use capacity of the batteries is also limited, so they need to be replaced regularly. In recent years, the emerging energy harvesting technology is to use all kinds of energy in the environment, convert it into electrical energy and store it for other uses. Compared with batteries, this...

AI Technical Summary

Problems solved by technology

However, most of the currently used piezoelectric devices have disadvantages such as low energy conversion efficiency, small vibration displacement, and low output power.

In the article Folded dielectric elastomeractuators published in the magazine SMART MATERIALS ANDSTRUCTURES in September 2007, a driver with a folded structure is proposed, as attached figure 2 .This kind of driver adopts a folded structure, so it is easy to wear at the corners, and this structure uses piezoelectric materials in a large area, so it is a waste of resources to use piezoelectric materials at corners where deformation is not easy

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