CN107846157A - Temperature difference electricity generation device - Google Patents

Temperature difference electricity generation device Download PDF

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Publication number
CN107846157A
CN107846157A CN201710942106.7A CN201710942106A CN107846157A CN 107846157 A CN107846157 A CN 107846157A CN 201710942106 A CN201710942106 A CN 201710942106A CN 107846157 A CN107846157 A CN 107846157A
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Prior art keywords
temperature difference
thermo
generation device
electricity generation
converting material
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CN201710942106.7A
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CN107846157B (en
Inventor
瞿三寅
陈立东
仇鹏飞
姚琴
宋君强
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Shanghai Institute of Ceramics of CAS
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Shanghai Institute of Ceramics of CAS
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002Generators
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10NELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N10/00Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
    • H10N10/80Constructional details
    • H10N10/85Thermoelectric active materials
    • H10N10/856Thermoelectric active materials comprising organic compositions

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Abstract

The present invention relates to temperature difference electricity generation device, possesses:Heat collector, it is bottom hot plate;Thermo-electric converting material, including along bottom hot plate bearing of trend alternate intervals arrange, there is orientation and differently- oriented directivity p-type thermo-electric converting material and N-type thermo-electric converting material parallel to bearing of trend;Adiabatic insulating barrier, it is located between thermo-electric converting material and bottom hot plate;Electrode, it electrically connects adjacent p-type thermo-electric converting material and N-type thermo-electric converting material, and the side of thermo-electric converting material is electric with the side of electrode, thermally contacts.

Description

Temperature difference electricity generation device
Technical field
The invention belongs to thin film thermoelectric device technical field, and in particular to a kind of temperature difference electricity generation device.
Background technology
Thermoelectric generation technology is Seebeck (Seebeck) effect and Peltier (Peltier) effect using semi-conducting material The technology that heat energy and electric energy should be directly changed, there is a systems such as noiseless, unharmful substance discharge, reliability height, long lifespan Row advantage, the utilization of used heat and mobile distributing thermal source utilize etc. and to play the role of to be difficult to substitute more than the industry.
The performance of thermoelectric material and Seebeck coefficient α, tri- relating to parameters of conductivityσ and thermal conductivity κ, with thermoelectric figure of merit ZT (ZT = α2σ T/ κ) description of this dimensionless group.
In practical application, thermoelectric material is processed into thermo-electric device.The performance of thermo-electric device is characterized with output voltage, its Calculation formula is V=n α Δs T.Wherein, V represents the output voltage values of device, and n represents the logarithm of thermocouple pair, and α represents material Seebeck coefficient, the temperature difference at the cold and hot both ends of Δ T presenting sets.
Characteristic based on thermoelectric material in itself, manufacturing cost is high, and conversion efficiency is low, and limiting the extensive of thermoelectric cell makes With.And in recent years, the research of thin film temperature difference battery becomes one of important research direction of temperature difference devices field, it is expected to be applied to Portable type electronic product and wearable electronic product.
At present, the main heat transfer direction of thin film thermoelectric device is perpendicular to substrate(I.e., thermal electric film)Surface, preparation side Formula is simple, therefore most of cogenerated products are all based on the preparation of this structure.But this structure the problem of bringing is to eliminate A large amount of heat radiations, because thermal electric film vertical direction only has the difference in height of 500 nm ~ 100 μm, though p-type and N-type thermal electric film So there is less thermal conductivity, but cold end is very close with hot junction, the heat radiation heat in hot junction is already close to thin by thermoelectricity The heat that film conducts in itself, cold end and the temperature difference in hot junction can not be kept, thus while thermal electric film have the higher figure of merit and Conversion efficiency, but the power output of the thermoelectric cell of less temperature official post in actual applications is still smaller.
In addition, there is anisotropic thermoelectric material for some(Such as most of organic film material), its parallel to Substrate(Film)Resistance be substantially less than the resistance of vertical direction, parallel to substrate(I.e., thermal electric film)The direction tool on surface There are more excellent electricity, thermotransport.
The content of the invention
Problems to be solved by the invention:
In order to solve the above-mentioned technical problem, the invention provides a kind of temperature difference that can effectively keep electrothermal module, so as to carry The temperature difference electricity generation device of the performance of high temperature difference TRT.
The means solved the problems, such as:
To realize as above goal of the invention, a kind of temperature difference electricity generation device provided by the invention, have:Heat collector, the heat collector are Bottom hot plate;Thermo-electric converting material, including along the bottom hot plate bearing of trend alternate intervals arrange, there is orientation And differently- oriented directivity is parallel to the p-type thermo-electric converting material and N-type thermo-electric converting material of the bearing of trend;Adiabatic insulating barrier, if Between the thermo-electric converting material and the bottom hot plate;Electrode, electrically connect adjacent the p-type thermo-electric converting material and N Type thermo-electric converting material, the side of the thermo-electric converting material is electric with the side of the electrode, thermally contacts.
According to the temperature difference electricity generation device of the present invention, heat transfer can be made to be oriented parallel to substrate(Thermoelectric material), Neng Gouyou Effect keeps thermo-electric device cold end and the temperature difference in hot junction, and effectively utilizes horizontal orientation thermo-electric converting material(As major part is organic Thin-film material)Resistance low in a lateral direction, device conversion efficiency is improved, is finally realized in wearable electronic energy field Using.
Further, the bottom hot plate includes the collection hot substrate and heat-radiating substrate that respective surface carries convex column, wherein The convex column is each protruded towards inner side to be set.Upper and lower substrate and convex column are integral same materials, that is, collect hot substrate And heat-radiating substrate, it is provided commonly for thermal-arrest and radiating.
Preferably, the p-type/contact between N-type thermo-electric converting material and the convex column of bottom hot plate is close electricity, heat Contact.
Further, the adiabatic insulating barrier also includes the fill part being located between the convex column.
Further, the heat collector is good thermal conductor, including copper, aluminium, copper-aluminium alloy, or white steel.
Further, the thermo-electric converting material is organic thermoelectric film material, and is formed as differently- oriented directivity parallel to institute The slim electrothermal module of bearing of trend is stated, the temperature range of the slim electrothermal module running is -50-70 DEG C.Thin-film is sent out If electrical part is generally used for wearable device, one end temperature is body temperature, generally 37 DEG C or so, and other end temperature is outer Boundary's environment temperature, depending on different regions).
Further, the material of the adiabatic insulating barrier is glass fibre cotton, polyurethane, phenolic resin, foamed silica gel, or Aeroge;Thickness is between 0.1-5mm.
Further, the paving mode of the adiabatic insulating barrier is laid for ripple type.And the adiabatic insulating barrier can be with bottom Thermal-arrest and heat-radiating substrate parallel laid.
Further, the electrode is in the height slightly held of the convex column and the thickness one of the thermo-electric converting material Cause.
Further, the width of the convex column is between 1-4mm;Length is between 1-8 mm.
Further, the near-end spacing distance of the convex column is between 2-20 mm;Distal end spacing distance 2-6cm it Between.
Invention effect:
The present invention can effectively keep the temperature difference of electrothermal module, and effectively utilize horizontal orientation thermal electric film(Such as major part Organic film material)Resistance low in a lateral direction, so as to improve the conversion efficiency of temperature difference electricity generation device.
Brief description of the drawings
Fig. 1 is the three dimensional structure diagram of the embodiment of temperature difference electricity generation device one of the present invention;
Fig. 2 is the structure schematic cross-sectional view of temperature difference electricity generation device shown in Fig. 1;
Fig. 3 is the structural representation of section on the left of Fig. 2 temperature difference electricity generation device;
Fig. 4 is the structural representation of section on the right side of Fig. 2 temperature difference electricity generation device;
Fig. 5 is the structural representation of Fig. 2 temperature difference electricity generation device top view cross section;
Fig. 6 is the three dimensional structure diagram of the heat collector of the embodiment of temperature difference electricity generation device one of the present invention;
Fig. 7 is the temperature difference of temperature difference electricity generation device of the present invention and electric current, the V diagram of formation;
Fig. 8 is the output voltage, current curve and power output of the embodiment of temperature difference electricity generation device of the present invention;
Fig. 9 is the heat transfer schematic diagram of the embodiment of temperature difference electricity generation device of the present invention;
Symbol description:
1 heat collector;
The upper substrates of 1a;
Substrate under 1b;
The upper substrate convex columns of 1c;
Substrate convex column under 1d;
2 adiabatic insulating barriers;
3 thermo-electric converting materials;
4 electrodes.
Embodiment
Accompanying drawing with reference to embodiments, the embodiment of the present invention is described in further detail, so that skill of the present invention Art scheme is more readily understood, grasped.
For many disadvantages of the prior art, the present invention is intended to provide a kind of temperature that can effectively keep electrothermal module Difference, so as to improve the temperature difference electricity generation device of the performance of temperature difference electricity generation device.And for the thermoelectric material of some horizontal orientations(Such as Most of organic film material), it is parallel to substrate(Film)Resistance be substantially less than the resistance of vertical direction.If heat transfer Direction is parallel to substrate(Film)Surface, then cold end and the temperature difference in hot junction not only can be effectively kept, and can improved The conversion efficiency of device.Therefore, how to design and manufacture heat transfer and be oriented parallel to substrate(Film)The thin film thermoelectric device on surface Part applies problem as solution is above-mentioned, realizes the key that thin film temperature difference battery further develops.
As shown in figure 1, the invention provides a kind of heat transfer to be oriented parallel to substrate(Thermoelectric material)Thermo-electric generation dress Put, be made up of heat collector 1, adiabatic insulating barrier 2, thermo-electric converting material 3 and electrode 4.In this embodiment, heat collector 1 is bottom Portion's hot plate, as shown in fig. 6, carrying upper and lower substrate 1a, 1b of convex column 1c, 1d including respective surface(Collect hot substrate and radiating Substrate), and each convex column 1c, 1d be formed as being respectively facing inner side protrusion strip it is raised, these strip projections are along collection Hot substrate/heat-radiating substrate depth direction extension.Adiabatic insulating barrier 2 includes the interlayer between thermo-electric converting material 3 and heat collector 1. And the as shown in figure 1, adiabatic insulating barrier 2 also filling out between the convex column 1c or 1d of the adjoining distance including heat collector surface Fill part.Thermo-electric converting material 3 is the thermo-electric converting material with orientation, be set in parallel in collection hot substrate and heat-radiating substrate it Between, and p-type arranges with N-type thermal electric film in horizontal alternate intervals;Electrode 4 is the conductive material with high thermal conductivity, makes phase Adjacent p-type and N-type thermal electric film realizes electrical connection.The side of thermo-electric converting material 3 electricity close with the side of electrode 4, thermally contact. In this embodiment, thermo-electric converting material 3 can be organic thermoelectric film material, and be formed as differently- oriented directivity and prolong parallel to heat collector The slim electrothermal module in direction is stretched, the temperature range of the slim electrothermal module running is -50-70 DEG C.
As shown in figure 1, it is the core three dimensional structure diagram of temperature difference electricity generation device of the present invention.Preferred reality as the present invention Example is applied, the temperature difference electricity generation device is applied to flexible wearable daily necessities.With heat collector, heat insulation layer, it is clipped between heat insulation layer Thermo-electric converting material and electrode composition.
From diagram, above-mentioned heat collector collects using excellent heat conductivity body as collection hot substrate and is designed with one on hot substrate The strip convex column 1c of formation(As shown in Fig. 5 top plan views, the position that is covered by electrode 4), width generally 1-4mm it Between, preferably 2mm.Collect the length of hot substrate strip convex column generally between 1-8 mm, preferably 5 mm.Electrode is high heat conduction and led The material of electricity, as shown in figure 1, along U-shaped coating between the slightly end of two strip convex columns and two strip convex columns, and The electrode in the height slightly held of strip convex column and the consistency of thickness of thermo-electric converting material 3, generally 500 nm-1 mm it Between.As shown in fig. 6, the near-end spacing distance of bottom strip convex column is between 2-20 mm, preferably 10 mm.Distal end spacing distance Between 2-6cm, preferably 4cm.
Good thermal conductor corresponding with collection hot substrate, as heat-radiating substrate, is similarly designed with integrally formed strip convex column 1d, width is generally between 1-4mm, preferably 2mm.The raised length of heat-radiating substrate strip is generally between 1-8 mm, and preferably 5 mm.Electrode is high heat conduction and conductive material, as shown in figure 1, along the slightly end of two strip convex columns and two strip projections U-shaped coating between post, and the electrode is in the raised height slightly held of strip and the consistency of thickness of thermo-electric converting material 3, Generally between 500 nm-1 mm.As shown in fig. 6, strip raised near-end spacing distance in bottom is between 2-20 mm, preferably 10 mm.Distal end spacing distance is between 2-6cm, preferably 4cm.
The outer surface of above-mentioned heat-radiating substrate can be located at the appearance of wearable product, with environment such as conventional air-cooled or gas flowings Based on radiating refrigeration.
Moreover, it is described above collection hot substrate and heat-radiating substrate orientation thermal electric film side respectively with upper and lower underlayer electrode The close electricity in side, thermo-contact.Realized and isolated by heat insulation layer between thermal electric film and upper and lower substrate, the thickness of heat insulation layer generally exists Between 0.1-5mm, preferably 2mm, and above-mentioned adiabatic layer material is distributed for wave.
Embodiment
As shown in figure 5, the temperature on the left of p-type thermal electric film of the present invention is suitable with the temperature for collecting hot substrate, on the right side of p-type thermal electric film Temperature it is suitable with the temperature of heat-radiating substrate, the temperature difference at thermal electric film both ends is close to the temperature between collection hot substrate and heat-radiating substrate Poor Δ T is spent, voltage V is formed in p-type thermal electric film horizontal direction1
Likewise, the temperature on the left of N-type thermal electric film is suitable with the temperature of heat-radiating substrate, on the right side of N-type thermal electric film Temperature is suitable with the temperature for collecting hot substrate, the temperature between the close collection hot substrate of temperature difference and heat-radiating substrate at thermal electric film both ends Poor Δ T, voltage V is formed in N-type thermal electric film horizontal direction2
Like this, constantly connect and output voltage is increased with this.By ensureing shape between collection hot substrate and heat-radiating substrate Into 10-70 DEG C of the temperature difference, it is possible to achieve effective output of temperature difference electricity generation device voltage;It is also, thin for the thermoelectricity of horizontal orientation Film, the lateral resistance of orientation thermal electric film can be reduced, so as to effectively improve the output voltage of temperature difference electricity generation device and efficiency.
Implement shown in described in such as Fig. 6 and Fig. 7, to be orientated conductive polymer poly 3- hexyl thiophenes as p-type thermal electric film, to take It is N-type thermal electric film to the mercaptan nickel of polyethylene four, output of the two pairs of p-types/N-type thermal electric film when the temperature difference is 40 DEG C is electric Piezo-electric flow curve and power output are as shown in the figure.When output current is 0.18 mA, power output reaches 2.7 μ W.If will be multiple Electrothermal module series and parallel integrates, then can greatly improve output voltage, electric current, increases power output, realizes thin film temperature difference battery Development and application.
The present invention is not limited to above-mentioned embodiment, can carry out various changes without departing from the spirit and scope of the invention Shape.For example, the collection hot substrate of the heat collector and the heat carrier that heat-radiating substrate can be identical material, or different materials Heat carrier, as long as meeting temperature range of the presently claimed invention.

Claims (10)

1. a kind of temperature difference electricity generation device, has:
Heat collector, the heat collector are bottom hot plate;
Thermo-electric converting material, including along the bottom hot plate bearing of trend alternate intervals arrange, have and orientation and take To the p-type thermo-electric converting material and N-type thermo-electric converting material for being oriented parallel to the bearing of trend;
Adiabatic insulating barrier, between the thermo-electric converting material and the bottom hot plate;
Electrode, the adjacent p-type thermo-electric converting material and N-type thermo-electric converting material are electrically connected, the thermo-electric converting material Side is electric with the side of the electrode, thermally contacts.
2. temperature difference electricity generation device according to claim 1, it is characterised in that the bottom hot plate carries including respective surface The collection hot substrate and heat-radiating substrate of convex column, set wherein the convex column is each protruded towards inner side.
3. temperature difference electricity generation device according to claim 2, it is characterised in that the adiabatic insulating barrier is also included located at described Fill part between convex column.
4. temperature difference electricity generation device according to claim 1, it is characterised in that the bottom hot plate is good thermal conductor, including Copper, aluminium, copper-aluminium alloy, or white steel.
5. the temperature difference electricity generation device according to claim 1 or 3, it is characterised in that the thermo-electric converting material is organic heat Conductive film material, and be formed as slim electrothermal module of the differently- oriented directivity parallel to the bearing of trend, the slim electrothermal module The temperature range of running is -50-70 DEG C.
6. temperature difference electricity generation device according to any one of claim 1 to 5, it is characterised in that the adiabatic insulating barrier Material is glass fibre cotton, polyurethane, phenolic resin, foamed silica gel, or aeroge;Thickness is between 0.1-5mm.
7. temperature difference electricity generation device according to any one of claim 1 to 6, it is characterised in that the adiabatic insulating barrier Paving mode is laid for ripple type.
8. temperature difference electricity generation device according to claim 2, it is characterised in that the electrode is slightly held the convex column Height and the consistency of thickness of the thermo-electric converting material.
9. temperature difference electricity generation device according to claim 2, it is characterised in that the width of the convex column is between 1-4mm; Length is between 1-8 mm.
10. temperature difference electricity generation device according to claim 2, it is characterised in that the near-end spacing distance of the convex column exists Between 2-20 mm;Distal end spacing distance is between 2-6cm.
CN201710942106.7A 2017-10-11 2017-10-11 Thermoelectric power generation device Active CN107846157B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112542541A (en) * 2020-11-27 2021-03-23 上海应用技术大学 Thermal power generation device and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102931879A (en) * 2012-11-28 2013-02-13 浙江大学 Thermoelectric-piezoelectric combined flexible micro-generating device
TW201440268A (en) * 2013-01-29 2014-10-16 Fujifilm Corp Thermalelectric power generating module
CN105070820A (en) * 2015-08-02 2015-11-18 杜效中 Fabrication method for novel thin film thermoelectric semiconductor device with separated cold end and hot end
JP2016139796A (en) * 2015-01-26 2016-08-04 積水化学工業株式会社 Thermoelectric conversion material and thermoelectric conversion module having the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102931879A (en) * 2012-11-28 2013-02-13 浙江大学 Thermoelectric-piezoelectric combined flexible micro-generating device
TW201440268A (en) * 2013-01-29 2014-10-16 Fujifilm Corp Thermalelectric power generating module
JP2016139796A (en) * 2015-01-26 2016-08-04 積水化学工業株式会社 Thermoelectric conversion material and thermoelectric conversion module having the same
CN105070820A (en) * 2015-08-02 2015-11-18 杜效中 Fabrication method for novel thin film thermoelectric semiconductor device with separated cold end and hot end

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112542541A (en) * 2020-11-27 2021-03-23 上海应用技术大学 Thermal power generation device and preparation method thereof

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