CN105406769B - Wearable flexible thermo-electric generation structure with extending wire - Google Patents
Wearable flexible thermo-electric generation structure with extending wire Download PDFInfo
- Publication number
- CN105406769B CN105406769B CN201510915285.6A CN201510915285A CN105406769B CN 105406769 B CN105406769 B CN 105406769B CN 201510915285 A CN201510915285 A CN 201510915285A CN 105406769 B CN105406769 B CN 105406769B
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- thermo
- electric generation
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- heat
- silicon rubber
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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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/82—Connection of interconnections
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
- H10N10/80—Constructional details
- H10N10/85—Thermoelectric active materials
- H10N10/851—Thermoelectric active materials comprising inorganic compositions
- H10N10/852—Thermoelectric active materials comprising inorganic compositions comprising tellurium, selenium or sulfur
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention discloses a kind of wearable flexible thermo-electric generation structure with extending wire.Faced out from wearing, successively including flexible thermal conductive silicon rubber cushion, thermo-electric generation layer, heat-conducting patch and metal fin；Thermo-electric generation layer cold end face and hot junction face are connected with above heat-conducting patch bottom surface and flexible thermal conductive silicon rubber cushion respectively, are connected above heat-conducting patch with metal fin bottom surface.When it dresses face fitting nonplanar human epidermal, ductile metals wire and dimethyl silicone polymer encapsulation absorb distortional stress, avoid the bismuth telluride-based thermoelectric arm of bad mechanical property from being broken the failure connected with electrode；The side packing flexibility thermal conductive silicon rubber cushion of hot junction one of thermo-electric generation layer, ensure the tight type contacted with wearer skin, improve heat transfer efficiency；The cold end of each rigid thermo-electric generation module has independent heat-conducting patch and metal fin, reduces structural thickness and quality, increases hot and cold side temperature difference.It can be energized to body-worn medical device, have application value.
Description
Technical field
The present invention relates to a kind of thermo-electric generation structure, more particularly to a kind of wearable flexible temperature difference with extending wire
Electrification structure.
Background technology
The application of body-worn medical device is more and more extensive, for example, pulse blood oxygen instrument, eeg monitoring instrument, ECG monitor,
Mycotoxin identification instrument and blood glucose monitoring system etc., the health indicator or adjuvant treatment of diseases of human body can be detected in real time.For wearable doctor
The energy supply for treating device offer lasting stability is the study hotspot of the world today one and problem.Existing energy-provision way relies primarily on lithium electricity
Pond powers, and its effective time is to be charged to several days, it is necessary to often remove equipment generally several hours, limits trouble
The sphere of action of person, many inconvenience are brought to patient；And for the patient of self-care ability difference, often replacing battery, which can add, sees
The human cost of shield.
In addition with some new energy-provision way, such as nuclear battery, external electromagnetic coupling energy supply, piezo-electric generating and the temperature difference
Generate electricity etc..Nuclear battery working life can be more than 10 years, but general volume is larger, and there is toxicity and radiation to endanger to human body
Danger；Being powered by way of external electromagnetic induction needs to carry extra device in vitro, it will the burden of increase patient's action；
Piezo-electric generating is that the energy of human motion is converted into electric energy, but people motion frequency is low or quiescent conditions under power output can not
Reach power consumption needed for device work.
Thermo-electric generation is the Seebeck effect using thermoelectric semiconductor material, converts heat into electric energy.Thermoelectric generator
Part is without moving parts, noiseless, pollution-free, simple in construction；Simultaneously as the thermostasis of human body and between body surface and external environment
With certain temperature difference, and thermo-electric generation is not required the lower limit of the temperature difference, therefore, can this directly sharp partial heat sent out
Electricity, realize lasting energy supply.
Existing miniature flexible thermo-electric generation component is typically that minisize thermoelectric arm is directly processed in the substrate of flexibility, then is led to
The methods of crossing the MEMS technologies such as sputtering, chemical vapor deposition or silver paste coating enters row conductor connection, this kind of thermo-electric generation component
Thickness is smaller, and the larger temperature difference can not be produced when human epidermal is as thermal source；Also researcher is by the thermoelectric of film class
Stereochemical structure is encapsulated as, increases thermograde, but because thin film thermoelectric materials resistance is larger, and MEMS technology processing thickness has
Limit, the power of generating are unable to reach the energy supply demand of conventional body-worn medical device.Due to the thermoelectricity of bismuth telluride material at room temperature
The figure of merit is higher, therefore, makes thermoelectric arm using the thermoelectric material of bismuth telluride-base, can improve the generating work(of temperature difference electricity generation device
Rate.But people's body surface many curved surfaces be present and physical activity has flexibility, it is necessary to which wearable thermo-electric generation component has
Smaller size and more preferable flexibility；The bismuth telluride-base mechanical property of materials is poor, and stress is easily caused breaking strain, so directly adds
The bismuth telluride-base material of work on a flexible substrate is easily broken off, and makes thermo-electric generation element failure.Therefore, exploitation one kind can reduce
Impact, flexible preferably temperature differential power generation micro-unit structure is very necessary.
The content of the invention
It is an object of the invention to provide can adapt to curved surface, technique are simple, conversion efficiency of thermoelectric is high, good reliability one
Wearable flexible thermo-electric generation structure of the kind with extending wire.
The technical solution adopted for the present invention to solve the technical problems is：
The present invention faces out from wearing, is dissipated successively including flexible thermal conductive silicon rubber cushion, thermo-electric generation layer, heat-conducting patch and metal
Backing；Thermo-electric generation layer cold end face and hot junction face are connected with above heat-conducting patch bottom surface and flexible thermal conductive silicon rubber cushion respectively, lead
It is connected above heat posted piece with metal fin bottom surface.
The thermo-electric generation layer, with least a line, often row is sent out containing two and the above structure identical rigidity temperature difference
Electric module, each rigid thermo-electric generation module is by multiple N-type thermoelectric arms and N-type thermoelectric arm same number p-type thermoelectric arm gold
Belong to conducting strip series connection, then be connected by flexible ductile metals wire with adjacent rigid thermo-electric generation module, each rigidity temperature
Between the multiple N-type thermoelectric arms and multiple p-type thermoelectric arms of poor power generation module group and ductile metals wire uses polydimethylsiloxanes
Alkane encapsulation forms thermo-electric generation layer.
The conductive filler particle of the flexible thermal conductive silicon rubber cushion is alumina particle, or aluminum oxide, magnesia and nitrogen
Change the hybrid particles of boron.
The N-type thermoelectric arm material is doped bismuth telluride base thermoelectricity material, and p-type thermoelectric arm material is doped bismuth telluride base heat
Electric material, metallic conduction sheet material are fine copper.
The invention has the advantages that：
Thermo-electric generation structure is made with soft using the dimethyl silicone polymer encapsulation with gap and ductile metals wire
Property, it can be deformed in multiple directions.When the wearing face of flexible thermo-electric generation structure is bonded nonplanar human epidermal, extending gold
Category wire and dimethyl silicone polymer encapsulation can absorb distortional stress, avoid the bismuth telluride-based thermoelectric arm of bad mechanical property from being broken
The failure connected with electrode.The side packing flexibility thermal conductive silicon rubber cushion of hot junction one of thermo-electric generation layer, substitutes conventional ceramic wafer heat conduction
Plate, the tight type contacted with wearer skin is ensure that, improves heat transfer efficiency；The cold end tool of each rigid thermo-electric generation module
There are independent heat-conducting patch and metal fin, reduce structural thickness and quality, increase hot and cold side temperature difference.
The invention has application value mainly for the energy supply of body-worn medical device.
Brief description of the drawings
Fig. 1 is the wearable flexible thermo-electric generation structural representation of bending.
Fig. 2 is the wearable flexible thermo-electric generation structural profile illustration of bending.
Fig. 3 is the exploded perspective view of wearable flexible thermo-electric generation structure.
The process chart of the wearable flexible thermo-electric generation structures of Fig. 4.
In figure：1. flexible thermal conductive silicon rubber cushion, 2. thermo-electric generation layers, 3. heat-conducting patchs, 4. metal fins, 5.N type thermoelectricity
Arm, 6.P type thermoelectric arms, 7. metallic conduction pieces, 8. ductile metals wires, 9. dimethyl silicone polymers.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
The present invention general principle be：
According to Seebeck effect, the temperature difference at p-type thermoelectric arm and N-type thermoelectric arm both ends can produce voltage difference.Due to single
Voltage is very low caused by thermocouple, can use the mode of " hot road is in parallel, circuit connected in series ", and p-type and N-type thermoelectric arm are formed into thermoelectricity
Array, so as to improve output voltage values.
The thermoelectric figure of merit highest of bismuth telluride material under normal temperature, temperature difference electricity generation device can be improved using bismuth telluride and its alloy
Generated output.But because the bismuth telluride mechanical property of materials is poor, stress is easily caused breaking strain.Pass through ductile metals
Wire, which connects, connects the rigid electrothermal module of single row or multiple rows array type, and when device deforms, ductile metals wire can be with
Distortional stress is absorbed, keeps the original shape of the structure of thermoelectric arm, so as to avoid thermoelectric material fracture from causing thermo-electric generation unit to lose
Effect.
As shown in Figure 1, Figure 2, Figure 3 shows, the present invention faces out from wearing, successively including flexible thermal conductive silicon rubber cushion 1, thermo-electric generation
Layer 2, heat-conducting patch 3 and metal fin 4；The two sides of thermo-electric generation layer 2 respectively with the bottom surface of heat-conducting patch 3 and flexible thermal conductive silicon rubber cushion
1 is connected above, and heat-conducting patch 3 is connected with the bottom surface of metal fin 4 above.
The thermo-electric generation layer 2, with least a line, often row contains two and above structure identical rigidity thermo-electric generation
Module, each rigid thermo-electric generation module are used by multiple N-type thermoelectric arms 5, with the same number p-type thermoelectric arm 6 of N-type thermoelectric arm 5
Metallic conduction piece 7 is connected, then is connected by the ductile metals wire 8 of flexibility with adjacent rigid thermo-electric generation module, each
Between the multiple N-type thermoelectric arms 5 and multiple p-type thermoelectric arms 6 of rigid thermo-electric generation module and ductile metals wire 8 is with poly- two
The encapsulation of methylsiloxane 9 forms thermo-electric generation layer 2.
The conductive filler particle of the flexible thermal conductive silicon rubber cushion 1 is alumina particle, or aluminum oxide, magnesia and nitrogen
Change the hybrid particles of boron, there is good heat conductivility, while can be anti-puncture, play a part of insulation.
The material of N-type thermoelectric arm 5 is doped bismuth telluride base thermoelectricity material, and the material of p-type thermoelectric arm 6 is doped bismuth telluride base
Thermoelectric material, the material of metallic conduction piece 7 are fine copper.
The present invention suppresses the bismuth telluride based bulk of p-type and N-type by powder semisolid, by wire cutting technology by compacting
Block cutting is into millimetre-sized cube thermoelectric arm.Thermoelectric arm surface after wire cutting is polished, removes impurity, then cold and hot two
End processes one layer of micron-sized nickel using evaporation process, prepares the thermoelectric arm needed for rigid thermo-electric generation module.
As shown in figure 4, it is micron-sized to spray one side coating of the method for tin or the heavy tin of chemistry to metallic conduction piece 7 using surface
Tin layers.The N-type thermoelectric arm 5 of equal amount, p-type thermoelectric arm 6 are intervally arranged into by thermoelectricity battle array by corresponding positioning clamping device
Row.Using mask plate corresponding with thermoelectric, lead-free solder is coated at the cold and hot both ends of N-type thermoelectric arm 5 and p-type thermoelectric arm 6.
According to the structure of circuit connected in series, the surface for covering tin with metallic conduction piece 7 respectively in the hot and cold side of thermoelectric arm connects, but in rigid heat
Electric module both ends are needed to connect on the thermoelectric arm hot junction face of flexible ductile metals wire 8 without coated with solder and covering metal
Conducting strip 7.Level clamp overall clamping is used in the outside of whole module, the device after clamping is put into vacuum furnace
Row welding.
It is exposed that the ductile metals wire 8 of flexibility is connected into multiple rigid thermo-electric generation module both ends by soldering respectively
Thermoelectric arm hot junction face, the material of ductile metals wire 8 is fine copper.The form of rigid thermo-electric generation module connection can be single
It is or multiple rows of.Ductile metals wire 8 and the thermoelectric arm portion size welded are equal with thermoelectric arm face area, intermediate connections chi
It is very little to be less than both ends area size, and have certain bending, there is ductility.When being bonded flexible curved surface, by flexible extending gold
The middle part for the ductile metals wire 8 that the deformation for the rigid thermo-electric generation module array that category wire 8 connects is concentrated mainly on, is reduced
The stress deformation of rigid thermo-electric generation module, avoids the fracture of thermoelectric arm, so as to avoid flexible thermo-electric generation structure
Failure.
Dimethyl silicone polymer mould with the projection that is intervally arranged is processed by three-dimensional printing technology, makes what is processed
The encapsulating structure of dimethyl silicone polymer 9 has gap between each rigid thermo-electric generation module, and reveals metallic conduction piece 7
Go out, improve the heat transfer property of thermo-electric generation layer.First, the thermoelectricity module connected is put into mould.Then, prepare resin with
The appropriate polydimethyl siloxane material of curing agent ratio, pours into mould, and be heating and curing poly dimethyl silicon in vacuum drying chamber
Oxygen alkane.Finally, the thermoelectricity module array that the dimethyl silicone polymer after solidification wraps up is separated from mould, forms temperature difference hair
Electric layer 2.Due to the low thermal conductivity of dimethyl silicone polymer, dimethyl silicone polymer 9 is encapsulated N-type thermoelectric arm 5 and p-type thermoelectric arm
6 wrap up, and expose the metallic conduction piece 7 of hot junction and cold end, will not reduce the temperature difference at the rigid cold and hot both ends of thermoelectricity module, but
The radiation and convection current between rigid thermo-electric generation module internal and each rigid thermo-electric generation module can be reduced, improves heat transfer effect
The effect of rate., can in flexible thermo-electric generation structural bending and the dimethyl silicone polymer after solidifying has certain flexibility
To absorb deformation, rigid thermo-electric generation module is set to be in close contact with human body skin.
Flexible thermal conductive silicon rubber cushion 1, the area and the temperature difference of flexible thermal conductive silicon rubber cushion 1 are sticked in the hot junction face of thermo-electric generation layer 2
The floor space of electric layer 2 is equal, and the conductive filler particle of thermal conductive silicon rubber cushion is generally alumina particle either aluminum oxide, magnesia
And the hybrid particles of boron nitride, there is good heat conductivility, while can be anti-puncture, play a part of insulation.Flexible heat conduction
Silicagel pad 1 can absorb deformation in thermo-electric generation structural bending, rigid thermo-electric generation module is in close contact with human body skin.
Heat-conducting patch 3 and fin 4 are sticked successively in the cold end face of thermo-electric generation layer 2.Each rigid thermo-electric generation module
Cold end there is independent heat-conducting patch 3 and metal fin 4.The material of metal fin 4 is metallic aluminium and metallic copper.
Claims (3)
- A kind of 1. wearable flexible thermo-electric generation structure with extending wire, it is characterised in that：Faced out from wearing, successively Including flexible thermal conductive silicon rubber cushion (1), thermo-electric generation layer (2), heat-conducting patch (3) and metal fin (4)；Thermo-electric generation layer (2) Cold end face and hot junction face are connected above with heat-conducting patch (3) bottom surface and flexible thermal conductive silicon rubber cushion (1) respectively, heat-conducting patch (3) It is connected above with metal fin (4) bottom surface；The thermo-electric generation layer (2), with least a line, often row contains two and above structure identical rigidity thermo-electric generation mould Group, each rigid thermo-electric generation module is by multiple N-type thermoelectric arms (5) and N-type thermoelectric arm (5) same number p-type thermoelectric arm (6) connected with metallic conduction piece (7), then the ductile metals wire (8) by flexibility and adjacent rigid thermo-electric generation module Connection, between multiple N-type thermoelectric arms (5) of each rigid thermo-electric generation module and multiple p-type thermoelectric arms (6) and ductile metals Wire (8) forms thermo-electric generation layer (2) with dimethyl silicone polymer (9) encapsulation.
- 2. wearable flexible thermo-electric generation structure according to claim 1, it is characterised in that：The flexible thermal conductive silicon rubber cushion (1) conductive filler particle is alumina particle, or the hybrid particles of aluminum oxide, magnesia and boron nitride.
- 3. wearable flexible thermo-electric generation structure according to claim 1, it is characterised in that：N-type thermoelectric arm (5) material Expect for doped bismuth telluride base thermoelectricity material, p-type thermoelectric arm (6) material is doped bismuth telluride base thermoelectricity material, metallic conduction piece (7) Material is fine copper.
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| CN201510915285.6A CN105406769B (en) | 2015-12-11 | 2015-12-11 | Wearable flexible thermo-electric generation structure with extending wire |
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| CN201510915285.6A CN105406769B (en) | 2015-12-11 | 2015-12-11 | Wearable flexible thermo-electric generation structure with extending wire |
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| CN105406769A CN105406769A (en) | 2016-03-16 |
| CN105406769B true CN105406769B (en) | 2017-11-24 |
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| CN113224228A (en) * | 2021-04-23 | 2021-08-06 | 清华大学深圳国际研究生院 | Flexible wearable thermoelectric generator |
| CN113488580B (en) * | 2021-06-25 | 2024-03-19 | 电子科技大学 | Flexible extensible thermoelectric device for accelerating hair regeneration and preparation method thereof |
| CN113517384B (en) * | 2021-07-08 | 2022-11-08 | 西安电子科技大学 | Stretchable flexible thermoelectric device and manufacturing method thereof |
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