CN114123859A - Cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester - Google Patents
Cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester Download PDFInfo
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- 239000003292 glue Substances 0.000 claims description 21
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- 238000004377 microelectronic Methods 0.000 description 7
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- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
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Abstract
The invention relates to a cymbal-shaped and stack composite dual-range piezoelectric stack energy harvester, which belongs to the technical field of vibration energy harvesting and comprises a pressure plate, a support frame, a base, a piezoelectric stack, a cymbal-shaped stack and a spring, wherein the cymbal-shaped stack and the piezoelectric stack are adopted for composite energy harvesting; the external force is in a large range when the external force exceeds a small range, the small-range supporting surface is attached to the supporting frame, the large-range energy harvesting occupies the main part, and the stress process of the large-range energy harvesting device is composed of a pressing plate, the supporting frame, a piezoelectric stack cavity and a base; the external force that receives is greater than the scope of wide-range, energy accumulator overload protection, and cymbal shape stack and piezoelectric stack do not take place vibration displacement, do not have the energy of harvesting this moment, and its atress process is clamp plate, support frame and base, can adapt to the great vibration environment of atress scope.
Description
Technical Field
The invention relates to a cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester, in particular to a dual-range piezoelectric stack energy harvester for heavy load, and belongs to the technical field of vibration energy harvesting.
Background
Energy problems are one of the most concerned problems at present, and scientific workers in various countries are always striving to find and develop new energy sources to solve the problems existing in the lack of energy sources and the use of traditional energy sources. At present, for most microelectronic products, batteries are widely used due to the advantages of stable electric quantity, easy energy requirement meeting of microelectronic products and the like. However, the conventional battery still has some unchangeable defects, such as large volume, large mass, limited energy supply life, need of regular replacement, and the problems of material waste, environmental pollution and the like caused by the unchangeable defects are not ignored, and especially for the wireless network and the embedded system which are developed rapidly at present, the defect of battery power supply is more obvious. One effective method is to capture and power energy directly from the operating environment of the microelectronic device. The vibration energy of the nature is captured and converted into electric energy by the energy conversion device, and the electric energy is stored and supplies energy to the microelectronic device. The piezoelectric material has good mechanical-electrical conversion characteristics, is the optimal choice for manufacturing energy supply devices of the microelectronic devices, and the power generation device manufactured by the piezoelectric material has the advantages of simple structure, no heat generation, no electromagnetic interference, no pollution, easiness in processing and manufacturing, realization of microminiaturization and integration of a mechanism and the like, and is receiving attention. The piezoelectric power generation device commonly reported at present is of a cantilever beam type. However, such a cantilever beam type piezoelectric power generation device has a small carrying capacity, is easily broken under a high load condition, cannot normally work, has a large structural size, and cannot meet the requirement of miniaturization development of modern microelectronic devices.
Disclosure of Invention
The invention aims to solve the problems that the traditional piezoelectric stack has low energy harvesting efficiency under the condition of low load and cannot normally work due to the fact that a cantilever beam is easy to break under the condition of high load in the vibration environment with a large stress range, and the traditional piezoelectric stack has large structural size and cannot meet the requirement of miniaturization development of modern microelectronic devices, so that the double-range piezoelectric power generation device suitable for the vibration environment with low load and high load is provided.
The invention comprises a pressure plate, a support frame, a base, a piezoelectric stack, a cymbal-shaped stack and a spring; the clamp plate include lead groove, cymbal shape pile chamber and the span holding surface of minimeasuring, the support frame includes lead post, lead post and spring chamber down, the base includes lead groove, piezoelectricity pile chamber and wide range holding surface down, cymbal shape pile includes rectangle piezoelectric patches, metal cymbal piece and square piezoelectric patches.
Preferably: the support frame comprises an upper lead column, a lower lead column and a spring cavity, the upper lead column is matched with an axial hole of the upper lead groove, the rectangular piezoelectric sheet above the cymbal-shaped stack is fixedly connected with the cymbal-shaped stack cavity through insulating glue, and the rectangular piezoelectric sheet below the cymbal-shaped stack is fixedly connected with the upper part of the spring through the insulating glue, so that the small range of the energy harvester is formed; the lower lead column is matched with the lower lead groove, the lower part of the piezoelectric stack is fixedly connected with the piezoelectric stack cavity through insulating glue, and the upper part of the piezoelectric stack is fixedly connected with the lower part of the spring through insulating glue, so that a large range of the energy harvester is formed; when the external force is applied in a small-range, a large range and a small range simultaneously capture energy, the small-range energy capture occupies a main part, and the stress process comprises a pressure plate, a cymbal-shaped stacking cavity, a cymbal-shaped stack, a spring, a piezoelectric stack cavity and a base; the external force is in a large range when the external force exceeds a small range, the small-range supporting surface is attached to the supporting frame, the large-range energy harvesting occupies the main part, and the stress process of the large-range energy harvesting device is composed of a pressing plate, the supporting frame, a piezoelectric stack cavity and a base; the external force is larger than the large-range, the energy harvester is protected from overload, the cymbal-shaped stack and the piezoelectric stack do not vibrate and displace, at the moment, the energy harvester does not harvest energy, and the stress process comprises a pressure plate, a support frame and a base.
Preferably: the cymbal-shaped stack comprises rectangular piezoelectric sheets, metal cymbal sheets and square piezoelectric sheets, wherein the upper surfaces of the rectangular piezoelectric sheets are fixedly connected with the 'hall' of each metal cymbal sheet through conductive glue, the 'bowls' of the metal cymbal sheets are fixedly connected with the lower surfaces of the square piezoelectric sheets through the conductive glue, the upper surfaces of the square piezoelectric sheets are fixedly connected with the 'bowls' of the next metal cymbal sheet through the conductive glue, and therefore a stack unit of the cymbal-shaped stack is formed, and the cymbal-shaped stack is composed of three stack units and one rectangular piezoelectric sheet.
The invention has the advantages that: when the external force is in a small-range, a large range and a small range simultaneously capture energy, and the small-range energy capture occupies a main part, wherein the stress process comprises a pressure plate, a cymbal-shaped stack cavity, a cymbal-shaped stack, a spring, a piezoelectric stack cavity and a base; the external force is in a large range when the external force exceeds a small range, the small-range supporting surface is attached to the supporting frame, the large-range energy harvesting occupies the main part, and the stress process of the large-range energy harvesting device is composed of a pressing plate, the supporting frame, a piezoelectric stack cavity and a base; the external force is larger than the large-range, the energy harvester is protected from overload, the cymbal-shaped stack and the piezoelectric stack do not vibrate and displace, at the moment, the energy harvester does not harvest energy, and the stress process comprises a pressure plate, a support frame and a base.
Drawings
Fig. 1 is a schematic structural diagram of a cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester;
FIG. 2 is an exploded assembly schematic diagram of a cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester;
FIG. 3 is a schematic structural view of the support frame;
FIG. 4 is a schematic structural diagram of a cymbal stack;
FIG. 5 is a schematic structural view of a piezoelectric stack;
FIG. 6 is a schematic view of the construction of the platen;
FIG. 7 is a schematic view of the structure of the base;
fig. 8 is a schematic view of the structure of the spring.
In the figure: the piezoelectric stack comprises a pressing plate 1, a supporting frame 2, a base 3, a piezoelectric stack 4, a cymbal stack 5, a spring 6, an upper lead groove 1-1, an upper lead groove 1-2, a cymbal stack cavity 1-2, a small-range supporting surface 1-3, an upper lead column 2-1, a lower lead column 2-2, a spring cavity 2-3, a lower lead groove 3-1, a piezoelectric stack cavity 3-2, a large-range supporting surface 3-3, a rectangular piezoelectric sheet 5-1, a metal cymbal sheet 5-2 and a square piezoelectric sheet 5-3.
Detailed Description
Preferred embodiments of the present invention are explained in detail below with reference to the accompanying drawings.
As shown in fig. 1 to 8, the cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester according to the present invention is characterized in that: the pressing plate 1, the support frame 2, the base 3, the piezoelectric stack 4, the cymbal-shaped stack 5 and the spring form 6; the pressing plate 1 comprises an upper lead groove 1-1, a cymbal-shaped stack cavity 1-2 and a small-range supporting surface 1-3, the supporting frame 2 comprises an upper lead column 2-1, a lower lead column 2-2 and a spring cavity 2-3, the base 3 comprises a lower lead groove 3-1, a piezoelectric stack cavity 3-2 and a large-range supporting surface 3-3, and the cymbal-shaped stack 5 comprises a rectangular piezoelectric sheet 5-1, a metal cymbal sheet 5-2 and a square piezoelectric sheet 5-3.
Further: the support frame 2 comprises an upper lead column 2-1, a lower lead column 2-2 and a spring cavity 2-3, wherein the upper lead column 2-1 is matched with an axial hole of an upper lead groove 1-1, an upper rectangular piezoelectric sheet 5-1 of the cymbal-shaped stack 5 is fixedly connected with the cymbal-shaped stack cavity 1-2 through insulating glue, and a lower rectangular piezoelectric sheet 5-1 of the cymbal-shaped stack 5 is fixedly connected with the upper part of the spring 6 through the insulating glue, so that a small range of the energy harvester is formed; the lower lead column 2-2 is matched with the lower lead groove 3-1, the lower part of the piezoelectric stack 4 is fixedly connected with the piezoelectric stack cavity 3-2 through insulating glue, and the upper part of the piezoelectric stack 4 is fixedly connected with the lower part of the spring 6 through insulating glue, so that a large range of the energy harvester is formed; when the external force is applied in a small-range, a large range and a small range simultaneously capture energy, the small-range energy capture occupies a main part, and the stress process comprises a pressure plate 1, a cymbal-shaped stacking cavity 1-2, a cymbal-shaped stack 5, a spring 6, a piezoelectric stack 4, a piezoelectric stack cavity 3-2 and a base 3; the stressed external force exceeds the small range and is in the large range, the small-range supporting surface 1-3 is attached to the supporting frame 2, the large-range energy harvesting occupies the main part, and the stress process comprises the pressing plate 1, the supporting frame 2, the piezoelectric stack 4, the piezoelectric stack cavity 3-2 and the base 3; the applied force is larger than the large-range, the energy harvester is protected from overload, the cymbal-shaped stack 5 and the piezoelectric stack 4 do not vibrate and displace, no energy harvesting is realized, and the stress process is the pressure plate 1, the support frame 2 and the base 3.
Further: the cymbal-shaped stack 5 comprises a rectangular piezoelectric sheet 5-1, a metal cymbal sheet 5-2 and a square piezoelectric sheet 5-3, wherein the upper surface of the rectangular piezoelectric sheet 5-1 is fixedly connected with the 'hall' of the metal cymbal sheet 5-2 through conductive glue, the 'bowl' of the metal cymbal sheet 5-2 is fixedly connected with the lower surface of the square piezoelectric sheet 5-3 through conductive glue, the upper surface of the square piezoelectric sheet 5-3 is fixedly connected with the 'bowl' of the next metal cymbal sheet 5-2 through conductive glue, so as to form a stack unit of the cymbal-shaped stack 5, and the cymbal-shaped stack 5 comprises three stack units and one rectangular piezoelectric sheet 5-1.
It will be apparent to persons skilled in the art that various changes and modifications can be made in the form and details of the embodiments, and the scope of the invention is not to be restricted except in the spirit of the appended claims.
Claims (3)
1. The utility model provides a compound dual-range piezoelectric stack energy harvester of cymbal shape and stack which characterized in that: the piezoelectric ceramic is composed of a pressure plate (1), a support frame (2), a base (3), a piezoelectric stack (4), a cymbal-shaped stack (5) and a spring (6); the pressing plate (1) comprises an upper lead groove (1-1), a cymbal-shaped stacking cavity (1-2) and a small-range supporting surface (1-3), the supporting frame (2) comprises an upper lead column (2-1), a lower lead column (2-2) and a spring cavity (2-3), the base (3) comprises a lower lead groove (3-1), a piezoelectric stacking cavity (3-2) and a large-range supporting surface (3-3), and the cymbal-shaped stacking (5) comprises a rectangular piezoelectric sheet (5-1), a metal cymbal sheet (5-2) and a square piezoelectric sheet (5-3).
2. The cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester of claim 1, wherein: the support frame (2) comprises an upper lead column (2-1), a lower lead column (2-2) and a spring cavity (2-3), the upper lead column (2-1) is matched with a shaft hole of the upper lead groove (1-1), an upper rectangular piezoelectric sheet (5-1) of the cymbal-shaped stack (5) is fixedly connected with the cymbal-shaped stack cavity (1-2) through insulating glue, and a lower rectangular piezoelectric sheet (5-1) of the cymbal-shaped stack (5) is fixedly connected with the upper part of the spring (6) through the insulating glue, so that a small range of the energy harvester is formed; the lower lead column (2-2) is matched with the lower lead groove (3-1), the lower part of the piezoelectric stack (4) is fixedly connected with the piezoelectric stack cavity (3-2) through insulating glue, and the upper part of the piezoelectric stack (4) is fixedly connected with the lower part of the spring (6) through insulating glue, so that a large range of the energy harvester is formed; when the external force is applied in a small-range, a large range and a small range simultaneously capture energy, the small-range energy capture occupies a main part, and the stress process comprises a pressure plate (1), a cymbal-shaped stacking cavity (1-2), a cymbal-shaped stack (5), a spring (6), a piezoelectric stack (4), a piezoelectric stack cavity (3-2) and a base (3); the stressed external force exceeds the small range and is in the large range, the small-range supporting surface (1-3) is attached to the supporting frame (2), the large-range energy harvesting occupies the main part, and the stress process of the large-range energy harvesting device is that the pressing plate (1), the supporting frame (2), the piezoelectric stack (4), the piezoelectric stack cavity (3-2) and the base (3); the applied external force is larger than the large-range, the energy harvester is overload-protected, the cymbal-shaped stack (5) and the piezoelectric stack (4) do not vibrate and displace, no energy harvesting is realized, and the stress process is the pressure plate (1), the support frame (2) and the base (3).
3. The cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester of claim 1, wherein: the cymbal-shaped stack (5) comprises a rectangular piezoelectric sheet (5-1), a metal cymbal sheet (5-2) and a square piezoelectric sheet (5-3), wherein the upper surface of the rectangular piezoelectric sheet (5-1) is fixedly connected with the 'hall' of the metal cymbal sheet (5-2) through conductive glue, the 'bowl' of the metal cymbal sheet (5-2) is fixedly connected with the lower surface of the square piezoelectric sheet (5-3) through conductive glue, the upper surface of the square piezoelectric sheet (5-3) is fixedly connected with the 'bowl' of the next metal cymbal sheet (5-2) through conductive glue, so that a stack unit of the cymbal-shaped stack (5) is formed, and the cymbal-shaped stack (5) is composed of three stack units and one rectangular piezoelectric sheet (5-1).
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| CN202111287015.7A CN114123859A (en) | 2021-11-02 | 2021-11-02 | Cymbal-shaped and stacked composite dual-range piezoelectric stack energy harvester |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656494A (en) * | 2009-09-18 | 2010-02-24 | 哈尔滨工业大学 | High-load piezoelectric generating device |
| US20120119620A1 (en) * | 2010-11-17 | 2012-05-17 | Space Administration | Multistage Force Amplification of Piezoelectric Stacks |
| CN203423635U (en) * | 2013-09-11 | 2014-02-05 | 中国人民解放军63983部队 | Self-sustaining cymbal piezoelectric generating apparatus |
| CN108149539A (en) * | 2017-12-14 | 2018-06-12 | 长安大学 | A kind of road Power Generation Road panel |
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- 2021-11-02 CN CN202111287015.7A patent/CN114123859A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656494A (en) * | 2009-09-18 | 2010-02-24 | 哈尔滨工业大学 | High-load piezoelectric generating device |
| US20120119620A1 (en) * | 2010-11-17 | 2012-05-17 | Space Administration | Multistage Force Amplification of Piezoelectric Stacks |
| CN203423635U (en) * | 2013-09-11 | 2014-02-05 | 中国人民解放军63983部队 | Self-sustaining cymbal piezoelectric generating apparatus |
| CN108149539A (en) * | 2017-12-14 | 2018-06-12 | 长安大学 | A kind of road Power Generation Road panel |
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