CN102903839A - Flexible thermoelectric generator and manufacturing method thereof - Google Patents
Flexible thermoelectric generator and manufacturing method thereof Download PDFInfo
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- CN102903839A CN102903839A CN2012103956200A CN201210395620A CN102903839A CN 102903839 A CN102903839 A CN 102903839A CN 2012103956200 A CN2012103956200 A CN 2012103956200A CN 201210395620 A CN201210395620 A CN 201210395620A CN 102903839 A CN102903839 A CN 102903839A
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Abstract
The invention relates to a flexible thermoelectric generator and a manufacturing method thereof. According to the technical scheme provided by the invention, the flexible thermoelectric generator comprises a first flexible substrate and a second flexible substrate located under the first flexible substrate, wherein a plurality of N type thermoelectric material particles and P type thermoelectric material particles, which are alternately distributed, are arranged between the first flexible substrate and the second flexible substrate; the N type thermoelectric material particles are electrically connected with the P type thermoelectric material particles in series through a first electrical connection layer on the first flexible substrate and a second electrical connection layer on the second flexible substrate, so that a plurality of thermoelectricity paired thermoelectric materials is formed between the first flexible substrate and the second flexible substrate; and the thermoelectric materials are packaged between the first flexible substrate and the second flexible substrate through flexible insulation and thermal insulation encapsulating materials. The flexible thermoelectric generator has a simple and convenient process, low manufacturing cost, high generating efficiency, and capability of being bent moderately, the application range is broadened, and the safety and the reliability are realized.
Description
Technical field
The present invention relates to a kind of thermoelectric generator, especially a kind of flexible thermal electric generator and manufacture method thereof belong to the technical field of thermoelectric generator.
Background technology
Because the growing microminiaturized trend of portable type electronic product has promoted the research and development of compact power supply.Thermoelectric generator is as a kind of self-centered energy, it can directly be converted to electric energy with heat energy according to the Seebeck effect, can keep actual unlimited useful life under the temperature that is fit to, this makes its new and high technology as a kind of energy field become one of focus of international research.
Thermoelectric generator generally is comprised of three parts: thermal source, heat sink and thermoelectric pile.Thermoelectric pile by the thermoelectricity that thermal power transfer can be become electric energy of a series of series connection to forming (diagram 2).Thermoelectric to being formed by dissimilar N/P type thermoelectric material, when its two ends, i.e. heat source side and heat sink end, when temperature gradient occurring, its two ends can produce electrical potential difference, as shown shown in 1.
The groundwork principle of thermoelectric device is based on the Seebeck effect.The Seebeck effect is a kind of pyroelectric phenomena that roentgen Seebeck finds.When metallic conductor or semiconductor structure add temperature difference Δ T, can supervene voltage Δ U.And open circuit voltage is proportional to the temperature difference linearly:
Wherein, α
sBe called the Seebeck coefficient, also can be described as thermoelectric (al) power.If the Seebeck coefficient of two kinds of constituent materials of thermocouple is respectively α
aAnd α
b, then the Seebeck Coefficient Definition of thermocouple is:
α
db＝α
a+α
b
When n connected to thermocouple, total Open Output Voltage can be expressed as Δ U
n:
ΔU
n=n·(α
ab·ΔT)
According to the thermoelectric generator that the Seebeck effect is made, its efficient can be characterized by thermoelectric figure of merit Z:
Wherein, σ is conductivity, and κ is thermal conductivity, and quality factor Z represents can be used on heat and the electrical properties of the thermoelectric material in the thermoelectric generator.
The tradition thermoelectric generator adopts the rectangular-shaped particle of thermoelectric material more, the form of then pressing thermoelectric pile, and the particle that N/P is different is pasted on the ceramic plate, and its particle that adopts can reach 1mm
2* 2mm or less cross section, higher aspect ratio.But its range of application is subject to the restriction of the material behaviors such as pottery, can't be applied to pipeline etc., and the place of certain bending need to be arranged.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of flexible thermal electric generator and manufacture method thereof are provided, its technique is simple and convenient, low cost of manufacture, and generating efficiency is high, can carry out the bending of appropriateness, expanded range of application, and is safe and reliable.
According to technical scheme provided by the invention, described flexible thermal electric generator, comprise the first flexible substrate and be positioned at the second flexible substrate of the first flexible substrate below, some alternatively distributed N-type thermoelectric material granules and P type thermoelectric material granule are set between described the first flexible substrate and the second flexible substrate, described N-type thermoelectric material granule is electrically connected after connecting with P type thermoelectric material granule by the second conduction articulamentum on the conduction articulamentum of first on the first flexible substrate and the second flexible substrate, comprise the thermoelectric material body that some thermoelectricity are right to form between the first flexible substrate and the second flexible substrate, described thermoelectric material body is encapsulated between the first flexible substrate and the second flexible substrate by the adiabatic Embedding Material body of flexible insulation.
Described the second flexible substrate is provided with the first connecting electrode and the second connecting electrode that is electrically connected with the thermoelectric material body, and described the first connecting electrode and the second connecting electrode are positioned at the outside of the first flexible substrate and the adiabatic Embedding Material body of flexible insulation.
Described the first flexible substrate is provided with the through hole of described the first flexible substrate of some perforations, described through hole be positioned at N-type thermoelectric material granule and/or P type thermoelectric material granule directly over.
Described the second flexible substrate is provided with the through hole of described the second flexible substrate of some perforations, described through hole be positioned at N-type thermoelectric material granule and/or P type thermoelectric material granule under.
Be filled with insulating heat-conductive Embedding Material body in the described through hole.
A kind of manufacture method of flexible thermal electric generator, the manufacture method of described flexible thermal electric generator comprises the steps:
A, provide required the first flexible substrate and the second flexible substrate;
B, on the required surface of the first flexible substrate electric conducting material is set, optionally shelters and the described electric conducting material of etching, to obtain the first required conduction articulamentum in the first flexible substrate;
C, on the required surface of the second flexible substrate electric conducting material is set, optionally shelters and the described electric conducting material of etching, to obtain the second required conduction articulamentum in the second flexible substrate;
D, required N-type thermoelectric material granule and both ends corresponding to P type thermoelectric material granule are welded on respectively on the first flexible substrate and the second flexible substrate, described N-type thermoelectric material granule is electrically connected after connecting with P type thermoelectric material granule by the second conduction articulamentum on the conduction articulamentum of first on the first flexible substrate and the second flexible substrate, comprises the thermoelectric material body that some thermoelectricity are right to form between the first flexible substrate and the second flexible substrate;
E, the thermoelectric material body that above-mentioned the first flexible substrate, the second flexible substrate and welding are formed are annealed;
F, the structure after utilizing flexible Embedding Material to above-mentioned annealing are carried out embedding, and the thermoelectric material body is encapsulated between the first flexible substrate and the second flexible substrate by the adiabatic Embedding Material body of flexible insulation.
Among the described step e, annealing temperature is 140 ℃ ~ 160 ℃.
Also comprise step g, in the first flexible substrate and/or the second flexible substrate through hole be set, the through hole on the first flexible substrate be positioned at N-type thermoelectric material granule and/or P type thermoelectric material granule directly over; Through hole on the second flexible substrate be positioned at N-type thermoelectric material granule and/or P type thermoelectric material granule under.
Be filled with insulating heat-conductive Embedding Material body in the described through hole.The material of described the first flexible substrate and the second flexible substrate comprises the PI film.
Advantage of the present invention: N-type thermoelectric material granule, P type thermoelectric material granule is encapsulated between the first flexible substrate and the second flexible substrate by the adiabatic Embedding Material body of flexible insulation after forming the thermoelectric material body, thereby so that the thermoelectric generator that obtains is by the first flexible substrate, the adiabatic Embedding Material body of the second flexible substrate and flexible insulation can produce certain bending and not damage, increased its range of application, the N-type thermoelectric material, P type thermoelectric material adopts traditional rectangular structure particle, has higher thermoelectrical efficiency, processing step is simple, reduce manufacturing cost, simple and compact for structure, safe and reliable.
Description of drawings
Fig. 1 is the principle schematic of existing thermoelectric generator.
Fig. 2 for form thermoelectric to after connection diagram.
Fig. 3 is the structural representation of the embodiment of the invention 1.
Fig. 4 is the view when the flexible thermal electric generator is crooked among Fig. 3.
Fig. 5 is the schematic diagram behind formation the first conduction articulamentum on the present invention's the first flexible substrate.
Fig. 6 is the schematic diagram behind formation the second conduction articulamentum on the present invention's the second flexible substrate.
Fig. 7 is the cutaway view that forms the flexible thermal electric generator among Fig. 3.
Fig. 8 is the structural representation of the embodiment of the invention 2.
Fig. 9 is the cutaway view of flexible thermal electric generator among Fig. 8.
Figure 10 is the structural representation of the embodiment of the invention 3.
Figure 11 is the cutaway view of flexible thermal electric generator among Figure 10.
Description of reference numerals: 1-thermoelectricity is right, 10-the first flexible thermal electric generator, 20-the second flexible thermal electric generator, 30-the 3rd flexible thermal electric generator, 100-the first flexible substrate, 101-the second flexible substrate, 102-the first connecting electrode, 103-the second connecting electrode, the adiabatic Embedding Material body of 104-flexible insulation, 201-the first conduction articulamentum, 202-the second conduction articulamentum, 301-N type thermoelectric material granule, 302-P type thermoelectric material granule, 401-through hole and 501-insulating heat-conductive Embedding Material body.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
Embodiment 1
Such as Fig. 3 and shown in Figure 7: be the structural representation of the first flexible thermal electric generator 10 in the embodiment of the invention, described the first flexible thermal electric generator 10 comprises the first flexible substrate 100 and is positioned at the second flexible substrate 101 of the first flexible substrate 100 belows, described the first flexible substrate 100 and 101 of the second flexible substrate arrange some alternatively distributed N-type thermoelectric material granules 301 and P type thermoelectric material granule 302, described N-type thermoelectric material granule 301 is electrically connected after connecting with P type thermoelectric material granule 302 by the second conduction articulamentum 202 on the conduction articulamentum 201 of first on the first flexible substrate 100 and the second flexible substrate 101, comprising some thermoelectricity in the first flexible substrate 100 and 101 formation of the second flexible substrate to 1 thermoelectric material body, described thermoelectric material body is encapsulated in 101 of the first flexible substrate 100 and the second flexible substrate by the adiabatic Embedding Material body 104 of flexible insulation.
The material of above-mentioned the first flexible substrate 100 and the second flexible substrate 101 comprises PI(Polyimide Film) film.After the thermoelectric material body is encapsulated in 101 of the first flexible substrate 100 and the second flexible substrate by the adiabatic Embedding Material body 104 of flexible insulation, formed flexible thermal electric generator has the flexibility of certain angle, can be used in needs in the crooked environment, in the occasions such as exhaust piping, discharge duct, as shown in Figure 4.The adiabatic Embedding Material body 104 of flexible insulation adopts the adiabatic Embedding Material of existing conventional flexible insulation, and personnel are known by the art; Simultaneously, the preparation process of N-type thermoelectric material granule 301 and P type thermoelectric material granule 302 is also known by the art personnel.In the thermoelectric material body that forms, the first conduction articulamentum 201 and the second conduction articulamentum 202 lay respectively at the two ends of N-type thermoelectric material granule 301 and P type thermoelectric material granule 302, and the syndeton on the first conduction articulamentum 201 and the second conduction articulamentum 202 is interspersed.
The flexible thermal electric generator of said structure can by following processing step preparation, comprise particularly
A, provide required the first flexible substrate 100 and the second flexible substrate 101;
As mentioned above, the material selection PI film of the first flexible substrate 100 and the second flexible substrate 101 also can be selected other flexible material;
B, on the first flexible substrate 100 required surfaces electric conducting material is set, optionally shelters and the described electric conducting material of etching, to obtain the first required conduction articulamentum 201 in the first flexible substrate 100;
C, on the second flexible substrate 101 required surfaces electric conducting material is set, optionally shelters and the described electric conducting material of etching, to obtain the second required conduction articulamentum 202 in the second flexible substrate 101;
The material of above-mentioned the first conduction articulamentum 201 and the second conduction articulamentum 202 comprises the metal materials such as copper, aluminium, silver, when forming the second conduction articulamentum 202, the second flexible substrate 101 also formed the first connecting electrode 102 and the second connecting electrode 103, described the first connecting electrode 102 and the second connecting electrode 103 are electrically connected with corresponding the second conduction articulamentum 201, follow-up formation thermoelectric material body outwards can be drawn by the first connecting electrode 102 and the second connecting electrode 103, the voltage that is about to the output of thermoelectric material body is outwards exported.In the embodiment of the invention, the length of the second flexible substrate 101 is greater than the length of the first flexible substrate 100, as shown in Figure 5 and Figure 6.
D, the both ends of required N-type thermoelectric material granule 301 and P type thermoelectric material granule 302 correspondences are welded on respectively on the first flexible substrate 100 and the second flexible substrate 101, described N-type thermoelectric material granule 301 is electrically connected after connecting with P type thermoelectric material granule 302 by the second conduction articulamentum 202 on the conduction articulamentum 201 of first on the first flexible substrate 100 and the second flexible substrate 101, to comprise the thermoelectric material body that some thermoelectricity are right in the first flexible substrate 100 and 101 formation of the second flexible substrate;
E, the thermoelectric material body that above-mentioned the first flexible substrate 100, the second flexible substrate 101 and welding are formed are annealed;
Described annealing temperature is 140 ℃ ~ 160 ℃, and usually, carrying out annealing temperature is 150 ℃.After annealing, the first conduction articulamentum 201 on thermoelectric material body and the first flexible substrate 100 and the second conduction articulamentum 202 on the second flexible substrate 101 closely are connected.
F, the structure after utilizing flexible Embedding Material to above-mentioned annealing are carried out embedding, and the thermoelectric material body is encapsulated in 101 of the first flexible substrate 100 and the second flexible substrate by the adiabatic Embedding Material body 104 of flexible insulation.
After utilizing adiabatic Embedding Material body 104 encapsulation of flexible insulation, so that the Stability Analysis of Structures of thermoelectric material body is on the first flexible substrate 100 and the second flexible substrate 101.
Such as Fig. 8 and shown in Figure 9: be the structural representation of this second flexible thermal electric generator 20, in the present embodiment, in order to realize the good thermal conductivity with the external world, the first flexible substrate 100 of the second flexible thermal electric generator 20 is provided with the through hole 401 that connects on described the first flexible substrate 100, described through hole 401 be positioned at N-type thermoelectric material granule 301 or P type thermoelectric material granule 302 directly over, simultaneously, through hole 401 also can be positioned at simultaneously N-type thermoelectric material granule 301 and P type thermoelectric material granule 302 directly over.
Further, also can be provided with the through hole 401 that connects the second flexible substrate 101 on described the second flexible substrate 101, through hole 401 be positioned at N-type thermoelectric material granule 301 or P type thermoelectric material granule 302 directly over, simultaneously, through hole 401 also can be positioned at simultaneously N-type thermoelectric material granule 301 and P type thermoelectric material granule 302 directly over.In the present embodiment, all be provided with through hole 401 on the first flexible substrate 100 and the second flexible substrate 101.
In order to obtain the structure of the present embodiment, on the preparation technology basis in embodiment 1, also comprise step g, optionally shelter and etching the first flexible substrate 100 and/or the second flexible substrate 101, to form required through hole 401 in the first flexible substrate 100 and/or the second flexible substrate 101, the position of through hole 401 arranges as mentioned above.Remaining processing step and condition are identical with embodiment 1 in the present embodiment, repeat no more herein.
Embodiment 3
As shown in Figure 10 and Figure 11: be the structural representation of the 3rd flexible thermal electric generator 30 in the embodiment of the invention, in the present embodiment, on the first flexible substrate 100 and the second flexible substrate 101, through hole 401 is set simultaneously in the 3rd flexible thermal electric generator 30, the through hole 401 on described the first flexible substrate 100 be positioned at N-type thermoelectric material granule 301 and/or P type thermoelectric material granule 302 directly over; Through hole 401 on the second flexible substrate 101 be positioned at N-type thermoelectric material granule 301 and/or P type thermoelectric material granule 302 under.Then in through hole 401, be filled with flexible insulation heat conduction Embedding Material body 501, both reached good heat conduction purpose by flexible insulation heat conduction Embedding Material body 501, also internal structure has been played protective effect simultaneously.
In order to obtain the structure of the present embodiment, on the preparation technology basis of embodiment 2, by the Embedding Material at through hole 401 interior embedding insulating heat-conductives, to form flexible insulation heat conduction Embedding Material body 501.
Such as Fig. 3 ~ shown in Figure 11: during use, use occasion according to the flexible thermal electric generator, the first flexible substrate 100 and the second flexibility are carried out the bending of required angle from very low 101, in order to flexible thermal electric generator and syndeton are fitted, improve installation and the accuracy of detection of whole converting system, easy for installation; The flexible thermal electric generator links to each other whole flexible thermal electric generator by the first connecting electrode 102 and the second connecting electrode 103 after connecting with external circuit.During work, the flexible thermal electric generator absorbs heat and is converted to electric energy, and the electric energy of described conversion outputs in the outside circuit.
N-type thermoelectric material granule 301 of the present invention, P type thermoelectric material granule 302 forms behind the thermoelectric material bodies by the adiabatic Embedding Material body 104 of flexible insulation and is encapsulated in 101 of the first flexible substrate 100 and the second flexible substrate, thereby so that the thermoelectric generator that obtains is by the first flexible substrate 100, the adiabatic Embedding Material body 104 of the second flexible substrate 101 and flexible insulation can produce certain bending and not damage, increased its range of application, the N-type thermoelectric material, P type thermoelectric material adopts traditional rectangular structure particle, has higher thermoelectrical efficiency, processing step is simple, reduce manufacturing cost, simple and compact for structure, safe and reliable.
Claims (10)
1. flexible thermal electric generator, it is characterized in that: comprise the first flexible substrate (100) and be positioned at second flexible substrate (101) of the first flexible substrate (100) below, some alternatively distributed N-type thermoelectric material granules (301) and P type thermoelectric material granule (302) are set between described the first flexible substrate (100) and the second flexible substrate (101), described N-type thermoelectric material granule (301) is electrically connected after connecting with P type thermoelectric material granule (302) by the second conduction articulamentum (202) on the conduction articulamentum (201) of first on the first flexible substrate (100) and the second flexible substrate (101), comprise the thermoelectric material body that some thermoelectricity are right to form between the first flexible substrate (100) and the second flexible substrate (101), described thermoelectric material body is encapsulated between the first flexible substrate (100) and the second flexible substrate (101) by the adiabatic Embedding Material body of flexible insulation (104).
2. flexible thermal electric generator according to claim 1, it is characterized in that: described the second flexible substrate (101) is provided with the first connecting electrode (102) and the second connecting electrode (103) that is electrically connected with the thermoelectric material body, and described the first connecting electrode (102) and the second connecting electrode (103) are positioned at the outside of the first flexible substrate (100) and the adiabatic Embedding Material body of flexible insulation (104).
3. flexible thermal electric generator according to claim 1, it is characterized in that: described the first flexible substrate (100) is provided with the through hole (401) of described the first flexible substrate of some perforations (100), described through hole (401) be positioned at N-type thermoelectric material granule (301) and/or P type thermoelectric material granule (302) directly over.
4. flexible thermal electric generator according to claim 1, it is characterized in that: described the second flexible substrate (101) is provided with the through hole (401) of described the second flexible substrate of some perforations (101), described through hole (401) be positioned at N-type thermoelectric material granule (301) and/or P type thermoelectric material granule (302) under.
5. it is characterized in that: be filled with insulating heat-conductive Embedding Material body (501) in the described through hole (401) according to claim 3 or 4 described flexible thermal electric generators.
6. the manufacture method of a flexible thermal electric generator is characterized in that, the manufacture method of described flexible thermal electric generator comprises the steps:
(a), provide required the first flexible substrate (100) and the second flexible substrate (101);
(b), on the required surface of the first flexible substrate (100) electric conducting material is set, optionally shelter and the described electric conducting material of etching, to obtain the first required conduction articulamentum (201) in the first flexible substrate (100);
(c), on the required surface of the second flexible substrate (101) electric conducting material is set, optionally shelter and the described electric conducting material of etching, to obtain the second required conduction articulamentum (202) in the second flexible substrate (101);
(d), required N-type thermoelectric material granule (301) and both ends corresponding to P type thermoelectric material granule (302) are welded on respectively on the first flexible substrate (100) and the second flexible substrate (101), described N-type thermoelectric material granule (301) is electrically connected after connecting with P type thermoelectric material granule (302) by the second conduction articulamentum (202) on the conduction articulamentum (201) of first on the first flexible substrate (100) and the second flexible substrate (101), comprises the thermoelectric material body that some thermoelectricity are right to form between the first flexible substrate (100) and the second flexible substrate (101);
(e), the thermoelectric material body that above-mentioned the first flexible substrate (100), the second flexible substrate (101) and welding is formed is annealed;
(f), the structure after utilizing flexible Embedding Material to above-mentioned annealing carries out embedding, the thermoelectric material body is encapsulated between the first flexible substrate (100) and the second flexible substrate (101) by the adiabatic Embedding Material body of flexible insulation (104).
7. the manufacture method of described flexible thermal electric generator according to claim 6, it is characterized in that: in the described step (e), annealing temperature is 140 ℃ ~ 160 ℃.
8. the manufacture method of described flexible thermal electric generator according to claim 6, it is characterized in that, also comprise step (g), in the first flexible substrate (100) and/or the second flexible substrate (101) through hole (401) be set, the through hole (401) on the first flexible substrate (100) be positioned at N-type thermoelectric material granule (301) and/or P type thermoelectric material granule (302) directly over; Through hole (401) on the second flexible substrate (101) be positioned at N-type thermoelectric material granule (301) and/or P type thermoelectric material granule (302) under.
9. the manufacture method of described flexible thermal electric generator according to claim 8 is characterized in that: be filled with insulating heat-conductive Embedding Material body (501) in the described through hole (401).
10. the manufacture method of described flexible thermal electric generator according to claim 6, it is characterized in that: the material of described the first flexible substrate (100) and the second flexible substrate (101) comprises the PI film.
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| CN104409621A (en) * | 2014-12-04 | 2015-03-11 | 长沙理工大学 | Semiconductor film type thermo-electric device and manufacturing method thereof |
| US20160003557A1 (en) * | 2013-03-06 | 2016-01-07 | Bae Systems Plc | Laminated heat exchanger including a heat sink and a thermoelectric device |
| CN106206923A (en) * | 2016-08-30 | 2016-12-07 | 北京理工大学 | A kind of flexible wearable temperature difference electricity generation device |
| CN108511590A (en) * | 2017-02-28 | 2018-09-07 | 杭州熵能热导科技有限公司 | A kind of novel thermoelectric refrigerating piece and its manufacturing method |
| CN110265538A (en) * | 2019-05-30 | 2019-09-20 | 清华大学 | Flexible thermoelectric generator and its preparation method and application system |
| CN110573230A (en) * | 2017-04-28 | 2019-12-13 | 3M创新有限公司 | Air filtration monitoring based on thermoelectric devices |
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| US20160003557A1 (en) * | 2013-03-06 | 2016-01-07 | Bae Systems Plc | Laminated heat exchanger including a heat sink and a thermoelectric device |
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| CN110573230A (en) * | 2017-04-28 | 2019-12-13 | 3M创新有限公司 | Air filtration monitoring based on thermoelectric devices |
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Application publication date: 20130130 |