CN108448939B - composite piezoelectric-thermoelectric automobile exhaust micro energy collector - Google Patents
composite piezoelectric-thermoelectric automobile exhaust micro energy collector Download PDFInfo
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- CN108448939B CN108448939B CN201810410585.2A CN201810410585A CN108448939B CN 108448939 B CN108448939 B CN 108448939B CN 201810410585 A CN201810410585 A CN 201810410585A CN 108448939 B CN108448939 B CN 108448939B
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- piezoelectric
- thermoelectric
- film electrode
- cantilever beam
- micro energy
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- 239000002131 composite material Substances 0.000 title claims abstract description 14
- 239000010409 thin film Substances 0.000 claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000009471 action Effects 0.000 claims abstract description 4
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000010408 film Substances 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 239000002470 thermal conductor Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000002033 PVDF binder Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
- F01N5/025—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat the device being thermoelectric generators
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention provides an composite piezoelectric-thermoelectric automobile exhaust micro energy collector, wherein a end of a cantilever beam is fixedly connected with a supporting seat, another end of the cantilever beam extends along the horizontal direction to form a free end, a mass block is fixed at the free end of the cantilever beam, a piezoelectric sheet is fixed on the upper surface of the cantilever beam, thin film electrodes are respectively positioned on the upper surface and the lower surface of the piezoelectric sheet, radiating fins are fixed on the upper surface of an upper thin film electrode, the energy collector is placed on the peripheral pipe wall of an automobile exhaust pipe, the cantilever beam vibrates under the action of automobile vibration, the piezoelectric sheet senses the vibration of the cantilever beam to generate charges, the charges are led out by the thin film electrodes, the lower surface of the piezoelectric sheet receives the heat of the exhaust gas conducted from the wall of the exhaust pipe, and the radiating fins are placed on the upper thin film electrode on the upper surface, so that temperature change is generated on.
Description
Technical Field
The invention belongs to the field of micro energy collection, and particularly relates to energy collectors based on piezoelectric effect and pyroelectric effect coupling.
Background
The gas monitoring sensor in the automobile exhaust pipe has great significance for environmental protection and resource utilization rate improvement, and the working mode of a lithium battery is greatly inconvenient due to the fact that the battery capacity is limited and frequent replacement is carried out, so that self-powered solutions, such as piezoelectric type, thermoelectric type and electrostatic type, which can absorb energy from the surrounding environment and convert the energy into electric energy are provided by researchers, for example, 2014, the automobile exhaust waste heat recovery thermoelectric power generation design provided by Tianjin university can effectively absorb the waste heat in the automobile exhaust and convert the waste heat into electric energy output, 2017, the friction type nano generator based on automobile vibration provided by Suzhou university proves that the nano generator can work and output electric energy under the vibration frequency of an automobile engine and is used for supplying power to the gas sensor, but the collection of the thermal energy and the vibration energy can be limited by the surrounding environment, the emission of the automobile exhaust can change along with the driving process of the automobile and the working state of the engine, the vibration of the automobile can greatly differ along with the road condition, and the driving state of the collection of the vibration energy can not be used for providing stable and effective energy supply for the gas.
Disclosure of Invention
The invention provides composite piezoelectric-thermoelectric automobile exhaust micro energy collectors which supply power to gas monitoring sensors in automobile exhaust pipes, the device can collect vibration energy of automobiles and waste heat in exhaust, is convenient and flexible, solves the problem of supplying single energy, and can normally work and complement each other even if energy sources are temporarily interrupted due to factors such as environment and the like, and simultaneously, the collection efficiency of the energy collectors is improved by organically combining the energy collectors.
kinds of compound piezoelectricity-thermoelectric car exhaust miniature energy collectors, including supporting seat, piezoelectric patches, cantilever beam, mass block, membrane electrode, air-cooling fin;
the piezoelectric plate is fixed on the upper surface of the cantilever beam, the film electrodes are divided into an upper film electrode and a lower film electrode which are respectively positioned on the upper surface and the lower surface of the piezoelectric plate, and the radiating fins are fixed on the upper surface of the upper film electrode;
the support seat is provided with a bending radian matched with the peripheral pipe wall of the automobile exhaust pipe, so that the energy collector is placed on the peripheral pipe wall of the automobile exhaust pipe; the cantilever beam vibrates under the action of the vibration of the automobile, and the piezoelectric sheet senses the vibration of the cantilever beam to generate electric charges which are led out by the film electrode; the lower surface of the piezoelectric plate receives heat of tail gas conducted from the wall of the exhaust pipe, and the upper film electrode on the upper surface is provided with the radiating fin, so that temperature change is generated on the piezoelectric plate, electric charge is generated by a pyroelectric effect, and the electric charge is led out through a film electrode lead to supply power for the gas monitoring sensor.
In the preferred embodiment of , the support base and the cantilever beam are made of a good thermal conductor material.
the cantilever beams have different geometrical sizes and shapes, such as of rectangle, trapezoid and curve.
In , the piezoelectric sheet is made of piezoelectric material with pyroelectric effect.
in a preferred embodiment, the piezoelectric sheet is a single or multi-sheet structure.
in the preferred embodiment, the piezoelectric sheet is circular or square in shape.
In the preferred embodiment of , the thin film electrode is a platinum thin film electrode.
In preferred embodiment, the masses have different masses, and the specific masses are set according to the frequency range of the vibration source in actual environment
Compared with the prior power generation technology, the invention has the following advantages and beneficial effects:
1. the invention has the advantages that overcomes the defect of single energy supply mode, and provides the method for organically combining the piezoelectric energy collection mode and the thermoelectric energy collection mode, thereby improving the collection efficiency of the energy collector, expanding the application range of the energy collector, and enabling the energy collector to work in the whole running process of the automobile and uninterruptedly supply power to the gas monitoring sensor.
2. The thermoelectric power generation module has the advantages of simpler structure, easy miniaturization and convenient maintenance compared with the thermoelectric power generation module.
Drawings
FIG. 1 is a schematic three-dimensional structure of a composite piezoelectric-thermoelectric automotive exhaust micro-energy collector according to a preferred embodiment of the present invention;
Detailed Description
The invention is further illustrated in and described in the following figures, but is not limited to this embodiment.
Referring to fig. 1, the present embodiment provides composite piezoelectric-thermoelectric automotive exhaust micro energy collectors, which are characterized by comprising a support base 1, a piezoelectric plate 2, a cantilever beam 3, a mass block 4, a film electrode 5, and a heat sink 6;
the piezoelectric film comprises a cantilever beam 3, a supporting seat 1, a mass block 4, a piezoelectric sheet 2, a film electrode 5, a radiating fin 6, a piezoelectric sheet 3, a piezoelectric sheet 2, a piezoelectric sheet, a piezoelectric film electrode and a piezoelectric film electrode, wherein the end of the cantilever beam 3 is fixedly connected with the supporting seat 1, and the end extends along the horizontal direction to form a free end;
the support seat 1 has a bending radian matched with the peripheral pipe wall of the automobile exhaust pipe, so that the energy collector is placed on the peripheral pipe wall of the automobile exhaust pipe; the cantilever beam 3 vibrates under the action of the vibration of the automobile, and the piezoelectric sheet 2 senses the vibration of the cantilever beam 3 to generate electric charges which are led out by the thin film electrode 5; the lower surface of the piezoelectric plate 2 receives the heat of the tail gas conducted from the wall of the exhaust pipe, and the upper film electrode on the upper surface is provided with the radiating fin 6, so that a temperature difference is formed on the piezoelectric plate 2, electric charges are generated by a pyroelectric effect, and the electric charges are led out through the film electrode 5 to supply power for the gas monitoring sensor.
In this embodiment, the support seat 1 and the cantilever beam 3 are made of copper, or other metal with good thermal conductivity. This embodiment is a simple alternative, and will not be described in detail.
The cantilever beam 3 is rectangular, and can be set to have other geometric shapes and sizes according to actual needs, such as trapezoid and curve.
In this embodiment, the supporting seat 1 is adhered to the outer wall of the exhaust pipe in a gluing manner, and may be fixed in other manners.
The piezoelectric sheet 2 is made of polyvinylidene fluoride (PVDF), and may be other piezoelectric materials having pyroelectric effect.
The piezoelectric plate 2 has a single-piece structure, and can also be designed into a structure with one or more pieces. The piezoelectric sheet 2 may be square or round.
The thin film electrode 5 is a platinum (Pt) thin film electrode, and may be an electrode of another material.
The heat sink can be selected from different specifications, and in this embodiment, the heat sink is an aluminum alloy heat sink.
The mass block 4 has different masses, the specific mass is set according to the frequency range of the vibration source in the actual environment, and the mass of the mass block 4 in the embodiment is matched with the low-frequency environment.
In conclusion, the composite piezoelectric-thermoelectric automobile exhaust micro energy collector provided by the invention overcomes the defect of a single energy supply mode, organically combines piezoelectric and thermoelectric energy collection modes, improves the collection efficiency of the energy collector, expands the application range of the energy collector, and enables the energy collector to work in the whole automobile running process and uninterruptedly supply power to a gas monitoring sensor.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1, composite piezoelectric-thermoelectric automobile exhaust micro energy collector, which is characterized by comprising a supporting seat, a piezoelectric plate, a cantilever beam, a mass block, a film electrode and a radiating fin;
the piezoelectric plate is fixed on the upper surface of the cantilever beam, the film electrodes are divided into an upper film electrode and a lower film electrode which are respectively positioned on the upper surface and the lower surface of the piezoelectric plate, and the radiating fins are fixed on the upper surface of the upper film electrode;
the support seat is provided with a bending radian matched with the peripheral pipe wall of the automobile exhaust pipe, so that the energy collector is placed on the peripheral pipe wall of the automobile exhaust pipe; the cantilever beam vibrates under the action of the vibration of the automobile, and the piezoelectric sheet senses the vibration of the cantilever beam to generate electric charges which are led out by the film electrode; the lower surface of the piezoelectric plate receives heat of tail gas conducted from the wall of the exhaust pipe, and the upper film electrode on the upper surface is provided with the radiating fin, so that temperature change is generated on the piezoelectric plate, electric charge is generated by a pyroelectric effect, and the electric charge is led out through a film electrode lead to supply power for the gas monitoring sensor.
2. The composite piezoelectric-thermoelectric automotive exhaust micro energy harvester of claim 1, wherein: the support base and the cantilever beam are made of a good thermal conductor material.
3. The piezoelectric-thermoelectric automotive exhaust micro-energy collector as claimed in claim 1, wherein said cantilever beams have different geometrical sizes and shapes, which can be types among rectangle, trapezoid and curve.
4. The composite piezoelectric-thermoelectric automotive exhaust micro energy harvester of claim 1, wherein: the piezoelectric sheet is made of piezoelectric materials with pyroelectric effect.
5. The composite piezoelectric-thermoelectric automotive exhaust micro energy harvester of claim 1, wherein: the piezoelectric plate is of a single-plate or multi-plate structure.
6. The composite piezoelectric-thermoelectric automotive exhaust micro energy harvester of claim 1, wherein: the piezoelectric sheet is round or square.
7. The composite piezoelectric-thermoelectric automotive exhaust micro energy harvester of claim 1, wherein: the thin film electrode is a platinum thin film electrode.
8. The composite piezoelectric-thermoelectric automotive exhaust micro energy harvester of claim 1, wherein: the mass blocks have different masses, and the specific mass is set according to the frequency range of the vibration source in the actual environment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810410585.2A CN108448939B (en) | 2018-05-02 | 2018-05-02 | composite piezoelectric-thermoelectric automobile exhaust micro energy collector |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810410585.2A CN108448939B (en) | 2018-05-02 | 2018-05-02 | composite piezoelectric-thermoelectric automobile exhaust micro energy collector |
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| CN108448939B true CN108448939B (en) | 2020-01-31 |
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| CN109217736A (en) * | 2018-10-17 | 2019-01-15 | 大连海事大学 | The miniature self energizing device that a kind of thermal energy based on cantilevered MPEG and MTEG and vibrational energy are provided multiple forms of energy to complement each other |
| CN114275642B (en) * | 2021-10-29 | 2024-02-27 | 江苏省句容中等专业学校 | Elevator alarm device for building electricity |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664555A (en) * | 2010-03-24 | 2012-09-12 | 上海交通大学 | Multi-frequency-band piezoelectric vibration energy collector |
| CN102931879A (en) * | 2012-11-28 | 2013-02-13 | 浙江大学 | Thermoelectric-piezoelectric combined flexible micro-generating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140174496A1 (en) * | 2012-12-21 | 2014-06-26 | Georgia Tech Research Corporation | Hybrid generator using thermoelectric generation and piezoelectric generation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664555A (en) * | 2010-03-24 | 2012-09-12 | 上海交通大学 | Multi-frequency-band piezoelectric vibration energy collector |
| CN102931879A (en) * | 2012-11-28 | 2013-02-13 | 浙江大学 | Thermoelectric-piezoelectric combined flexible micro-generating device |
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