A piezoelectric electromagnetic composite vibration energy capture button battery

Abstract

The invention relates to a piezoelectric electromagnetic composite vibration capture button battery, comprising a battery top cover, an upper spring, an upper washer, a hollow shaft, a lower washer, alower spring, a battery case, a magnetic battery base and a composite piezoelectric cantilever beam, wherein, the battery top cover, the battery case and the battery base constitute a sealing cavity;the upper spring, the upper washer, the composite piezoelectric cantilever beam, the lower washer, the lower spring and the hollow shaft constitute a piezoelectric power generating device. When the device vibrates, the composite piezoelectric cantilever beam vertically vibrates, the piezoelectric patch generates electricity, at the same time, the induction current is generated by the end part coil winding of the composite piezoelectric cantilever beam due to the change of the magnetic flux, the piezoelectric power generation and electromagnetic power generation energy is collected to the button battery, and the button battery is used in the fields of micro-electromechanical systems, wireless sensors and the like, and has the advantages of good energy collection efficiency, no need for maintenance, long service life, energy saving and environmental protection, easy integration, strong environmental adaptability and the like.

Description

technical field [0001] The invention belongs to the field of piezoelectric power generation, and in particular relates to a piezoelectric-electromagnetic composite vibration energy-harvesting button battery. Background technique [0002] With the development of science and technology, self-power supply technology occupies an increasingly important position in the fields of micro-electromechanical systems, precision machinery, intelligent machinery, wireless sensors, biomedicine, aerospace and other fields. At the same time, people pay more and more attention to the concept of environmental protection. Therefore, there is an urgent need for a new energy battery that is easy to integrate with tiny machines to replace traditional dry batteries, button batteries and lithium batteries. With the development of piezoelectric power generation technology, piezoelectric self-generating devices with piezoelectric ceramics as the core functional material stand out. However, there are f...

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Problems solved by technology

[0003] In order to solve the problems of low power density, poor environmental adaptability, difficulty in integration, and inability to meet the needs of electrical devices in the current general piezoelectric self-generating structure, a piezoelectric-electromagnetic composite vibration energy-harvesting button battery is proposed. The composite vibration energy harvesting button battery consists of the battery top cover, battery case and magnetic battery base to form the external structure of the cylindrical button battery. The interior of the battery is composed of gaskets, springs, hollow shafts and composite piezoelectric cantilever beams to form a vibration energy conversion structure. The device not only changes the structural form of the traditional piezoelectric cantilever into an array fan-shaped piezoelectric cantilever to make full use of the internal space of the battery cylinder, but also changes the mass block at the end of the piezoelectric cantilever to a ring coil, and the piezoelectric cantilever vibrates At the same time, the toroidal coil generates induced current due to the change of magnetic flux

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