CN107181426B - Vibration and temperature difference composite piezoelectric energy harvesting battery - Google Patents
Vibration and temperature difference composite piezoelectric energy harvesting battery Download PDFInfo
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- CN107181426B CN107181426B CN201710452859.XA CN201710452859A CN107181426B CN 107181426 B CN107181426 B CN 107181426B CN 201710452859 A CN201710452859 A CN 201710452859A CN 107181426 B CN107181426 B CN 107181426B
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- 238000003306 harvesting Methods 0.000 title claims abstract description 26
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 22
- 239000000110 cooling liquid Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 15
- 230000005611 electricity Effects 0.000 abstract description 11
- 230000010354 integration Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract 1
- 238000010248 power generation Methods 0.000 description 7
- 239000002470 thermal conductor Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention relates to a vibration and temperature difference composite piezoelectric energy harvesting battery, which comprises: the device comprises an upper battery shell, a lower battery shell, an upper spring, a lower spring, an upper piezoelectric cantilever beam, a lower piezoelectric cantilever beam, a transmission shaft, a dished thermal bimetallic strip and a cooling tower. Wherein: go up battery case and experience external environment heat transfer and give the dish-shaped hot bimetallic strip, make it take place decurrent deformation at the temperature critical point, drive transmission shaft downstream, go up the piezoelectricity cantilever beam and released, produce the vibration, the piezoelectricity cantilever beam is strikeed down, also produces the vibration under the spring action down. When the disc-shaped thermal bimetallic strip is cooled by a cooling material of the cooling tower, the deformation is recovered, the transmission shaft moves upwards, and the upper piezoelectric cantilever beam and the lower piezoelectric cantilever beam vibrate again at the moment. The device can also utilize environmental vibration to generate electricity, can meet the power supply requirement of the micro-electromechanical equipment when being used in the micro-electromechanical equipment, and has the advantages of simple structure, strong environmental adaptability, high energy harvesting efficiency, easy integration and the like.
Description
Technical Field
The invention belongs to the field of piezoelectric power generation, and particularly relates to a vibration and temperature difference composite piezoelectric energy harvesting battery.
Background
In recent years, with the application of micro-electromechanical devices (MEMS) in the fields of wireless sensor network nodes, military weapons, aerospace, medical treatment, and the like, the power supply problem of the micro-electromechanical devices has attracted much attention. The traditional chemical battery has the problems of limited battery life, difficult integration, poor environmental adaptability, pollution and the like, and the traditional circuit can not be directly used for supplying power to micro-electromechanical equipment in a specific occasion. Therefore, self-powered devices are receiving more and more attention, and devices utilizing solar power generation, electromagnetic power generation, thermoelectric power generation, vibration power generation, wind power generation and the like have entered practical stages, but have various advantages and disadvantages. The self-powered device which utilizes environmental vibration to drive the piezoelectric power generation unit to generate power is a popular research direction due to the advantages of convenience in integration, strong environmental adaptability, no electromagnetic interference and the like. However, the existing vibration energy harvesting device can only use environmental vibration to generate electricity, and when the micro-electromechanical device on which the vibration energy harvesting device is arranged does not vibrate, the micro-electromechanical device cannot generate electricity normally, so that a self-powered device capable of generating electricity by using multiple environmental energies simultaneously is urgently needed.
Disclosure of Invention
In order to solve the problem that the existing piezoelectric energy harvesting device utilizing vibration can only utilize single environment vibration to generate electricity, a vibration and temperature difference composite piezoelectric energy harvesting battery is provided. The vibration and temperature difference composite type piezoelectric energy harvesting battery comprises an upper battery shell, a lower battery shell, an upper spring, a lower spring, an upper piezoelectric cantilever beam, a lower piezoelectric cantilever beam, a transmission shaft, a butterfly-shaped thermal bimetallic strip and a cooling tower. The upper battery shell and the lower battery shell are connected to form a battery closed sealing cavity, the upper battery shell is used for sensing external temperature, the temperature is transmitted to the disc-shaped thermal bimetallic strip to enable the temperature to rise continuously, when the deformation critical point is reached, the disc-shaped thermal bimetallic strip deforms downwards to drive the transmission shaft to move downwards, the piezoelectric cantilever beam is released in an initial state and moves downwards, the piezoelectric cantilever beam vibrates up and down, the lower piezoelectric cantilever beam moves downwards along with the cooling tower due to the impact of the disc-shaped thermal bimetallic strip, and the piezoelectric cantilever beam vibrates up and down along with the upper piezoelectric cantilever beam. The cooling tower is laminated to dish heat bimetallic strip, and cooling liquid can make dish heat bimetallic strip temperature drop in the cooling tower, and when descending the uniform temperature, dish heat bimetallic strip can resume deformation, upward movement, and the piezoelectricity cantilever beam is opened and takes place the vibration this moment, goes up the piezoelectricity cantilever beam and receives the impact of transmission shaft also can take place the vibration. Meanwhile, the device can also utilize environmental vibration to generate electricity, and the upper spring and the lower spring can sense the external environmental vibration sensitively to drive the piezoelectric cantilever beam connected with the upper spring to vibrate. The temperature difference and the vibration are utilized to generate electricity, an energy capture mode is added, and the energy capture efficiency is improved. When the energy harvesting device is arranged on the applicable micro-electromechanical device, the power utilization requirement of the micro-electromechanical device can be met, and the energy harvesting device has the advantages of simple structure, strong environmental adaptability, high energy harvesting efficiency, easiness in integration and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention relates to a vibration and temperature difference composite type piezoelectric energy harvesting battery, which comprises: go up battery case (1), battery case (2) down, go up spring (3), lower spring (4), go up piezoelectricity cantilever beam (5) and piezoelectricity cantilever beam (6), transmission shaft (7) down, its characterized in that still includes dish-shaped hot bimetallic strip (8) and cooling tower (9), wherein: the upper battery shell (1) and the lower battery shell (2) are both cylindrical shells with bottoms, a circular sinking groove is arranged in the center of the inner surface of the bottom of each cylindrical shell, and a circumferential sinking groove is arranged on the surface of an opening on the upper side of each shell to form a shoulder; the upper battery shell (1) is a good thermal conductor, and the lower battery shell (2) is a bad thermal conductor; the lower surface of the upper battery shell (1) is connected with the upper surface of the lower battery shell (2) to form a battery sealing cavity; the upper spring (3) and the lower spring (4) are both helical springs, the upper spring (3) is arranged in a circular sinking groove of the upper battery shell (1), and the lower spring (4) is arranged in a circular sinking groove of the lower battery shell (2); the upper piezoelectric cantilever beam (5) consists of an elastic substrate (51), a fan-shaped piezoelectric sheet (52) and a mass block (53), the elastic substrate (51) consists of a wafer and a plurality of fan-shaped cantilever beams arrayed outside the wafer, the fan-shaped piezoelectric sheet (52) is adhered to the upper surface of the fan-shaped cantilever beam, and the mass block (53) is adhered to the upper surface of the outer edge of the fan-shaped cantilever beam; the lower piezoelectric cantilever beam (6) and the upper piezoelectric cantilever beam (5) are the same component; the transmission shaft (7) is a hollow shaft; the dish-shaped thermal bimetallic strip (8) is a dish-shaped sheet component which is made of different metal materials at the upper layer and the lower layer, wherein the thermal expansion coefficient of the metal material at the upper layer is far larger than that of the metal at the lower layer, and a through hole is arranged in the center of the dish-shaped sheet; the upper surface of the transmission shaft (7) is contacted with the lower surface of the upper piezoelectric cantilever beam (5), the lower end of the transmission shaft is arranged in a through hole of the dished thermal bimetallic strip (8) in an interference fit manner, and the upper surface of the upper piezoelectric cantilever beam (5) is connected to the lower end of the upper spring (3); the cooling tower (9) consists of two communicated cylindrical hollow shells, the volume of the upper cylindrical shell is far larger than that of the lower cylindrical shell, and the upper surface of the upper cylindrical shell is in a concave spherical surface shape; the shell of the cooling tower (9) is filled with cooling liquid; a gap is reserved between the upper end of the cooling tower (9) and the disc-shaped thermal bimetallic strip (8), the lower end of the cooling tower is connected to the upper surface of the lower piezoelectric cantilever beam (6), and the lower surface of the piezoelectric cantilever beam (6) is connected to the upper end of the lower spring (4).
The dished thermal bimetallic strip (8) may be replaced by a dished foil made of a shape memory alloy.
When the micro-electro-mechanical equipment is heated, the upper battery shell can transmit the external temperature to the disc-shaped thermal bimetallic strip to enable the temperature to continuously rise, when the deformation critical point is reached, the disc-shaped thermal bimetallic strip deforms downwards to drive the transmission shaft to move downwards, the initial state is released by the upper piezoelectric cantilever, the piezoelectric cantilever beam vibrates downwards due to the fact that the lower piezoelectric cantilever beam is impacted by the disc-shaped thermal bimetallic strip and moves downwards along with the cooling tower, and the piezoelectric cantilever beam vibrates upwards and downwards along with the upper piezoelectric cantilever beam. The cooling tower is laminated to dish heat bimetallic strip, and cooling liquid can make dish heat bimetallic strip temperature drop in the cooling tower, when dropping the uniform temperature, dish heat bimetallic strip can resume the deformation, upward movement, and the piezoelectricity cantilever beam is released and takes place the vibration this moment, goes up the piezoelectricity cantilever beam and receives the impact of transmission shaft also can take place the vibration. Meanwhile, the device can also utilize environmental vibration to generate electricity, and the upper spring and the lower spring can sense the external environmental vibration sensitively to drive the piezoelectric cantilever beam connected with the upper spring to vibrate. The temperature difference and the vibration are utilized to generate electricity, an energy capture mode is added, and the energy capture efficiency is improved. When the energy harvesting device is arranged on the applicable micro-electromechanical device, the power utilization requirement of the micro-electromechanical device can be met, and the energy harvesting device has the advantages of simple structure, strong environmental adaptability, high energy harvesting efficiency, easiness in integration and the like.
Drawings
FIG. 1 is a schematic diagram of an assembly relationship of a vibration and temperature difference composite type piezoelectric energy harvesting battery of the invention.
Fig. 2 is a sectional view of the vibration and temperature difference composite type piezoelectric energy harvesting battery in an initial state.
Fig. 3 is a sectional view of the vibration and temperature difference composite type piezoelectric energy harvesting battery according to the invention in a thermal deformation state.
Detailed Description
Referring to fig. 1, 2 and 3, the vibration and temperature difference composite piezoelectric energy harvesting battery of the invention comprises: go up battery case (1), battery case (2) down, go up spring (3), lower spring (4), go up piezoelectricity cantilever beam (5) and piezoelectricity cantilever beam (6), transmission shaft (7) down, its characterized in that still includes dish-shaped hot bimetallic strip (8) and cooling tower (9), wherein: the upper battery shell (1) and the lower battery shell (2) are both cylindrical shells with bottoms, a circular sinking groove is arranged in the center of the inner surface of the bottom of each cylindrical shell, and a circumferential sinking groove is arranged on the surface of an opening on the upper side of each shell to form a shoulder; the upper battery shell (1) is a good thermal conductor, and the lower battery shell (2) is a bad thermal conductor; the lower surface of the upper battery shell (1) and the upper surface of the lower battery shell (2) are welded to form a battery sealing cavity; the upper spring (3) and the lower spring (4) are both helical springs, the upper spring (3) is arranged in a circular sinking groove of the upper battery shell (1), and the lower spring (4) is arranged in a circular sinking groove of the lower battery shell (2); the upper piezoelectric cantilever beam (5) consists of an elastic substrate (51), a fan-shaped piezoelectric sheet (52) and a mass block (53), the elastic substrate (51) consists of a wafer and a plurality of fan-shaped cantilever beams arrayed outside the wafer, the fan-shaped piezoelectric sheet (52) is adhered to the upper surface of the fan-shaped cantilever beam, and the mass block (53) is adhered to the upper surface of the outer edge of the fan-shaped cantilever beam; the lower piezoelectric cantilever beam (6) and the upper piezoelectric cantilever beam (5) are the same component; the transmission shaft (7) is a hollow shaft; the dish-shaped thermal bimetallic strip (8) is a dish-shaped sheet component which is made of different metal materials at the upper layer and the lower layer, wherein the thermal expansion coefficient of the metal material at the upper layer is far larger than that of the metal at the lower layer, and a through hole is arranged in the center of the dish-shaped sheet; the upper surface of the transmission shaft (7) is contacted with the lower surface of the upper piezoelectric cantilever beam (5), the lower end of the transmission shaft is arranged in a through hole of the dished thermal bimetallic strip (8) in an interference fit manner, and the upper surface of the upper piezoelectric cantilever beam (5) is welded to the lower end of the upper spring (3); the cooling tower (9) consists of two communicated cylindrical hollow shells, the volume of the upper cylindrical shell is far larger than that of the lower cylindrical shell, and the upper surface of the upper cylindrical shell is in a concave spherical surface shape; the shell of the cooling tower (9) is filled with cooling liquid; a gap is reserved between the upper end of the cooling tower (9) and the disc-shaped thermal bimetallic strip (8), the lower end of the cooling tower is welded on the upper surface of the lower piezoelectric cantilever beam (6), and the lower surface of the piezoelectric cantilever beam (6) is welded on the upper end of the lower spring (4).
The dished thermal bimetallic strip (8) may be replaced by a dished foil made of a shape memory alloy.
When the micro-electro-mechanical equipment is heated, the upper battery shell can transmit the external temperature to the disc-shaped thermal bimetallic strip to enable the temperature to continuously rise, when the deformation critical point is reached, the disc-shaped thermal bimetallic strip deforms downwards to drive the transmission shaft to move downwards, the initial state is released by the upper piezoelectric cantilever, the piezoelectric cantilever beam vibrates downwards due to the fact that the lower piezoelectric cantilever beam is impacted by the disc-shaped thermal bimetallic strip and moves downwards along with the cooling tower, and the piezoelectric cantilever beam vibrates upwards and downwards along with the upper piezoelectric cantilever beam. The cooling tower is laminated to dish heat bimetallic strip, and cooling liquid can make dish heat bimetallic strip temperature drop in the cooling tower, and when descending the uniform temperature, dish heat bimetallic strip can resume deformation, upward movement, and the piezoelectricity cantilever beam is opened and takes place the vibration this moment, goes up the piezoelectricity cantilever beam and receives the impact of transmission shaft also can take place the vibration. Meanwhile, the device can also utilize environmental vibration to generate electricity, and the upper spring and the lower spring can sense the vibration of the external environment sensitively to drive the piezoelectric cantilever beam connected with the upper spring to vibrate. The temperature difference and the vibration are utilized to generate electricity, an energy capture mode is added, and the energy capture efficiency is improved. When the energy harvesting device is arranged on the applicable micro-electromechanical device, the power utilization requirement of the micro-electromechanical device can be met, and the energy harvesting device has the advantages of simple structure, strong environmental adaptability, high energy harvesting efficiency, easiness in integration and the like.
Claims (2)
1. A vibration and temperature difference composite type piezoelectric energy harvesting battery comprises: go up battery case (1), battery case (2) down, go up spring (3), lower spring (4), go up piezoelectricity cantilever beam (5) and piezoelectricity cantilever beam (6), transmission shaft (7) down, its characterized in that still includes dish-shaped hot bimetallic strip (8) and cooling tower (9), wherein: the upper battery shell (1) and the lower battery shell (2) are both cylindrical shells with bottoms, a circular sinking groove is arranged in the center of the inner surface of the bottom of each cylindrical shell, and a circumferential sinking groove is arranged on the surface of an opening on the upper side of each shell to form a shoulder; the lower surface of the upper battery shell (1) is connected with the upper surface of the lower battery shell (2) to form a battery sealing cavity; the upper spring (3) and the lower spring (4) are both helical springs, the upper spring (3) is arranged in a circular sinking groove of the upper battery shell (1), and the lower spring (4) is arranged in a circular sinking groove of the lower battery shell (2); the upper piezoelectric cantilever beam (5) consists of an elastic substrate (51), a fan-shaped piezoelectric sheet (52) and a mass block (53), the elastic substrate (51) consists of a wafer and a plurality of fan-shaped cantilever beams arrayed outside the wafer, the fan-shaped piezoelectric sheet (52) is adhered to the upper surface of the fan-shaped cantilever beam, and the mass block (53) is adhered to the upper surface of the outer edge of the fan-shaped cantilever beam; the lower piezoelectric cantilever beam (6) and the upper piezoelectric cantilever beam (5) are the same component; the transmission shaft (7) is a hollow shaft; the dish-shaped thermal bimetallic strip (8) is a dish-shaped sheet component which is made of different metal materials at the upper layer and the lower layer, wherein the thermal expansion coefficient of the metal material at the upper layer is far larger than that of the metal at the lower layer, and a through hole is arranged in the center of the dish-shaped sheet; the upper surface of the transmission shaft (7) is contacted with the lower surface of the upper piezoelectric cantilever beam (5), the lower end of the transmission shaft is arranged in a through hole of the dished thermal bimetallic strip (8) in an interference fit manner, and the upper surface of the upper piezoelectric cantilever beam (5) is connected to the lower end of the upper spring (3); the cooling tower (9) consists of two communicated cylindrical hollow shells, the volume of the upper cylindrical shell is far larger than that of the lower cylindrical shell, and the upper surface of the upper cylindrical shell is in a concave spherical surface shape; the shell of the cooling tower (9) is filled with cooling liquid; and a gap is reserved between the upper end of the cooling tower (9) and the disc-shaped thermal bimetallic strip (8), the lower end of the cooling tower is connected to the upper surface of the lower piezoelectric cantilever beam (6), and the lower surface of the lower piezoelectric cantilever beam (6) is connected to the upper end of the lower spring (4).
2. The vibration and temperature difference composite type piezoelectric energy harvesting battery of claim 1, which is characterized in that: the dished thermal bimetal (8) is replaced by a dished metal sheet made of a shape memory alloy.
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| CN107769616A (en) * | 2017-11-30 | 2018-03-06 | 安徽理工大学 | A kind of bistable state piezoelectric energy recovery structure |
| CN108195942B (en) * | 2018-02-28 | 2023-05-23 | 桂林电子科技大学 | Acoustic emission detection device and method for meshing performance of chain wheel and round-link chain |
| CN109705528B (en) * | 2018-11-30 | 2021-05-11 | 浙江理工大学 | Water-based epoxy resin composite film, preparation method thereof and temperature difference energy collector |
| CN109861584B (en) * | 2019-04-09 | 2024-02-09 | 苏州市职业大学 | Power generation device for collecting arm swing energy |
| JP7108645B2 (en) * | 2020-01-27 | 2022-07-28 | 株式会社鷺宮製作所 | Instrumentation and diagnostic systems |
| CN112477528A (en) * | 2020-12-28 | 2021-03-12 | 桂林电子科技大学 | Automatic power supply method for intelligent equipment of automobile tire |
| CN113078022A (en) * | 2021-03-16 | 2021-07-06 | 哈尔滨工业大学 | Intelligent thermal switch based on shape memory alloy and piezoelectric material |
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| WO2015106601A1 (en) * | 2014-09-24 | 2015-07-23 | 北京工业大学 | Spherical bistable cantilevered beam piezoelectric generator having separate parts between composite layers |
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