CN107046092B - Wearable thermoelectric generator and preparation method thereof with engraved structure substrate - Google Patents
Wearable thermoelectric generator and preparation method thereof with engraved structure substrate Download PDFInfo
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- CN107046092B CN107046092B CN201710125445.6A CN201710125445A CN107046092B CN 107046092 B CN107046092 B CN 107046092B CN 201710125445 A CN201710125445 A CN 201710125445A CN 107046092 B CN107046092 B CN 107046092B
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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
- H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
- H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
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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
- H10N10/01—Manufacture or treatment
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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
- H10N19/00—Integrated devices, or assemblies of multiple devices, comprising at least one thermoelectric or thermomagnetic element covered by groups H10N10/00 - H10N15/00
- H10N19/101—Multiple thermocouples connected in a cascade arrangement
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Abstract
The invention discloses a kind of wearable thermoelectric generator and preparation method thereof with engraved structure substrate.The hot end face of thermoelectric block body array and the copper electrode of flexible printed circuit board connect, and cold end face is connect with copper current-conducting piece；Thermoelectric block body array is by copper electrode and the series connection of cold end copper current-conducting piece composition or in series and parallel.Its production method, including flexible printed circuit board production and solder-coated, the positioning and welding of thermoelectric block body, cold end copper current-conducting piece positions and solder-coated, thermoelectric generator cold end erection welding and etc..Circuit board of the invention increases the flexibility of wearable thermoelectric generator, and the line number and the thermoelectric block body number in every row for changing thermoelectric block body array meet the needs of different driving device；P-type is avoided using thermoelectric block body positioning plate and N-type thermoelectric block body moves in the welding process, guarantees to contact with the good of conductive electrode.Cold end copper current-conducting piece is positioned using 3 D-printing, keeps thermoelectric block body corresponding with cold end copper current-conducting piece position accurate, contact is good.
Description
Technical field
The present invention relates to thermoelectric power generation devices and preparation method thereof, more particularly, to a kind of wearing with engraved structure substrate
Wear formula thermoelectric generator and preparation method thereof.
Background technique
Current wearable electronic device is widely used in the monitoring of human body physical sign, the collection of physical activity data and mobile intelligence
It can apply.Existing wearable electronic device mainly uses lithium battery to energize, and cruise duration is limited, limits wearable electronics device
The use scope of part；Meanwhile waste lithium cell easily pollutes the environment.Thermoelectric generator is based on Seebeck effect, collects
Thermal energy is simultaneously converted to electric energy, and human body is exchanged with ambient enviroment there are lasting heat, and therefore, thermoelectric generator can use people
Body generates electricity with temperature difference existing for environment, persistently energizes for wearable electronic device.
Traditional thermoelectric generator outer side covering rigid insulation ceramic wafer, when being worn on human body, between ceramic wafer and skin
Gap will increase thermal resistance, reduce the output performance of thermoelectric generator.And can be bonded radius of curvature different for flexible thermoelectric generator
Surface, and the impact failure of human motion or external vibration to thermoelectric generator can be reduced, it is more suitable for wearable electronic device
Energize application.
Currently, the main manufacturing processes of flexible thermoelectric generator are physically or chemically depositing operation and silk-screen printing agglomerant
Skill.Physically or chemically the thermoelectric arm film internal resistance of depositing operation processing is big, and output power is lower, and micro-nano process equipment is high
It is expensive, manufacturing cost is high and the period is long, be unfavorable for being mass produced.The thermoelectric arm of silk-screen printing sintering process uses thermoelectric material powder
End and the mixed slurry of organic bond are processed, and the addition of organic bond makes the thermoelectric arm performance of production lower than thermoelectric material
The thermoelectric arm of direct forming processing, therefore output performance is lower than conventional rigid thermoelectric generator.
Summary of the invention
County is asked present in technology based on the above background, and the purpose of the present invention is to provide one kind to have engraved structure substrate
Wearable thermoelectric generator and preparation method thereof, the flexibility of thermoelectric generator can be improved, reduce technological operation difficulty and
Equipment requirement, while improving the output performance of device.
The technical solution adopted by the invention is as follows:
One, a kind of wearable thermoelectric generator with engraved structure substrate:
The present invention is faced out from wearing, successively includes flexible printed circuit board, thermoelectric block body array and cold end copper current-conducting piece；
The hot end face of thermoelectric block body array is connected by the copper electrode upper surface of medium temperature solder and flexible printed circuit board, thermoelectric block body battle array
The cold end face of column is connect by solder with the lower surface of cold end copper current-conducting piece；Thermoelectric block body array have m row, m be even number,
And m >=2, every row contain four pairs and dimensions above and number p-type and N-type thermoelectric block body all the same, thermoelectric block body array passes through
Copper electrode and cold end copper current-conducting piece the composition series connection of hot end flexible printed circuit board or series and parallel structure.
The flexible printed circuit board has engraved structure, the thermoelectric row of the quantity of engraved structure according to the design needs
Depending on number, thermoelectric block body number and size.
Two, a kind of production method of the wearable thermoelectric generator with engraved structure substrate, comprising the following steps:
1) according to wearing occasion and external drive device job requirement, determine thermoelectric generator thermoelectric block body logarithm n with
P, n p-type and N-type thermoelectric block body is respectively cut into the p-type shaped and N-type thermoelectric material by the size of N-type thermoelectric block body,
And n >=8；
2) production have engraved structure flexible printed circuit board and solder-coated halftone, the halftone position of opening with it is soft
Property printed circuit board copper electrode position it is corresponding, medium temperature solder is existed by solder-coated halftone blade coating using silk-screen printing technique
On flexible printed circuit board；
3) flexible printed circuit board for being coated with medium temperature solder is fixed on the bottom plate with screw hole, and bottom plate installs positioning additional
Stud and washer；Thermoelectric block body positioning plate is made, aperture respectively corresponds thermoelectric block body and positioning stud position on the positioning plate,
Thermoelectric block body positioning plate is covered on flexible printed circuit board；N N-type thermoelectric block body and n p-type thermoelectric block body are passed through into heat
Electric block positioning plate is alternately disposed in the position that solder is had been coated on flexible printed circuit board；
4) cover board blending bolt is installed additional in n exposed N-type thermoelectric block body and n p-type thermoelectric block body upper end to screw, carry out
Welding；Cover board, bottom plate and thermoelectric block body positioning plate are removed after cooling, obtain thermoelectric generator hot end part；
5) sanding and polishing cold end copper current-conducting piece positions cold end copper current-conducting piece using the mold of 3 D-printing, and sub- with polyamides
Amine adhesive tape is adhesively fixed；
6) solder is coated using the identical silk-screen printing technique of step 2)；
Wherein step 2) ~ 4) and step 5) ~ 6) carry out simultaneously, or separate and successively carry out；
7) by the thermoelectric block body when corresponding cold end part of cold end copper current-conducting piece coating solder it is exposed while put
It sets；It installs cover board blending bolt additional to screw, be welded；
8) cover board and bottom plate are removed after cooling；Kapton Tape is removed using alcohol solution dipping, obtains wearable temperature
Poor electric organ.
The flexible printed circuit board base material is polyimides, and N-type thermoelectric block body material is doped bismuth telluride base heat
Electric material, p-type thermoelectric block body material are doped bismuth telluride base thermoelectricity material.
The thermoelectric material forming technology is Qu Rong, hot pressing or discharge plasma sintering, and thermoelectric block body cutting technique is line
Cutting.
The solder-coated of the thermoelectric generator is with a thickness of 0.05 ~ 0.15 mm.
Being welded in vacuum furnace for the thermoelectric generator carries out.
The medium temperature solder is Sn96.5Ag3Cu0.5, welding temperature is 260 DEG C, and weld interval is 3 minutes；Solder is
Sn48Bi52, welding temperature is 180 DEG C, and weld interval is 3 minutes.
The invention has the advantages that:
The flexibility that there is the present invention flexible printed circuit board of engraved structure substrate to increase wearable thermoelectric generator, can
It is deformed in multiple directions；The thermoelectric block body number in line number and every row by changing thermoelectric block body array, can satisfy difference
The application demand of driving element.In production method, p-type is avoided using thermoelectric block body positioning plate and N-type thermoelectric block body is welding
It is moved in termination process, guarantees to contact with the good of conductive electrode.Cold end copper current-conducting piece is positioned using 3 D-printing and polyimides
Adhesive tape is fixed, and keeps thermoelectric block body corresponding with cold end copper current-conducting piece position accurate, contact is good.The applied field of thermo-electric device is widened
It closes, improves the use occasion of wearable thermoelectric power generation device.
Detailed description of the invention
Fig. 1 is the schematic diagram of flexible thermoelectric generator of the invention.
Fig. 2 is manufacturing process flow schematic diagram of the invention
Fig. 3 is the flexible printed circuit board schematic diagram with engraved structure.
Fig. 4 is the flexible printed circuit board schematic diagram for coating medium temperature solder.
Fig. 5 is thermoelectric block body positioning plate schematic diagram.
Fig. 6 is the perspective view of the explosion of flexible thermoelectric generator hot end part assembly.
Fig. 7 is the schematic diagram for the flexible thermoelectric generator hot end part that present invention manufacture obtains.
Fig. 8 is the fixed cold end copper current-conducting piece schematic diagram of Kapton Tape
Fig. 9 is the cold end copper current-conducting piece schematic diagram for coating solder.
Figure 10 is the perspective view of the explosion of flexible thermoelectric generator cold end assembly.
In figure: 1, flexible printed circuit board, 2, engraved structure, 3, thermoelectric block body array, 4, cold end copper current-conducting piece, 5, polyamides
Imido grpup bottom, 6, copper electrode, 7, medium temperature solder, 8, thermoelectric block body positioning plate, 9, bottom plate, 10, p-type thermoelectric block body, 11, N-type heat
Electric block, 12, cover board, 13, Kapton Tape, 14, solder.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in Figure 1, the present invention is faced out from wearing, successively include the flexible printed circuit board 1 with engraved structure 2,
Thermoelectric block body array 3 and cold end copper current-conducting piece 4；The hot end face of thermoelectric block body array 3 passes through medium temperature solder and flexible print circuit
The copper electrode upper layer of plate 1 connects, and the cold end face of thermoelectric block body array 3 is connected by the lower layer of solder and cold end copper current-conducting piece 4
It connects；Thermoelectric block body array 3 has m row, and m is even number, and four pairs and dimensions above and number P all the same are contained in m >=2, every row
Type and N-type thermoelectric block body, copper electrode and cold end the copper current-conducting piece composition that thermoelectric block body array passes through hot end flexible printed circuit board
Series connection or series and parallel structure, are as shown in figure 1 cascaded structure.
The flexible printed circuit board 1 has engraved structure 2, the thermoelectricity battle array of the quantity of engraved structure 2 according to the design needs
Depending on column line number, thermoelectric block body number and size.
Production method provided by the invention, specifically, the invention mainly comprises flexible printed circuit board production and solders
Coating, positioning and welding, the positioning of cold end copper current-conducting piece and solder-coated, the thermoelectric generator cold end erection welding of thermoelectric block body are several
Big step.As shown in Fig. 2, for the coating of medium temperature solder and solder while the situation of progress.
One, flexible printed circuit board production and solder-coated
P-type and N-type thermoelectric block body material of the present invention is doped bismuth telluride base thermoelectricity material, p-type thermoelectric block body material ingredient
For Bi0.5Sb1.5Te3, N-type thermoelectric block body material ingredient is Bi2Se0.5Te2.5.Thermoelectric arm logarithm n is selected as 24 pairs.By zone-melting process at
It is rectangular thermoelectric block body that the p-type of shape and the thermoelectric material of N-type, which pass through linear cutter, and block bottom surface is the pros of side length 1.15mm
Shape, a height of 1.2mm；Two end faces that the copper electrode and cold end copper current-conducting piece of thermoelectric block body and flexible printed circuit board 1 weld are equal
Nickel plating is tin plating.
As shown in figure 3, production has the flexible printed circuit board 1 of engraved structure, the thickness selection 25 of polyimide substrate 5
μm, copper electrode 6 with a thickness of 17.5 μm.Make the solder-coated halftone of 0.12mm thickness, the aperture and flexibility of solder-coated halftone
6 position of copper electrode of printed circuit board 1 is corresponding.Unleaded medium temperature solder 7 selects fusing point for 217 DEG C of Sn96.5Ag3Cu0.5.To nothing
After the medium temperature solder 7 of lead is sufficiently stirred, solder is coated on flexible printed circuit board 1 by halftone with metallic spatula, such as Fig. 4
It is shown.
Two, the positioning of thermoelectric block body and thermoelectric generator hot end are welded
The flexible printed circuit board 1 for being coated with solder is fixed on the bottom plate 9 with screw hole, installs positioning stud and thickness additional
Degree is the washer of 0.5mm.Thermoelectric block body positioning plate 8 is made, the aperture of thermoelectric block body positioning plate 8 corresponds to thermoelectric block body and positioning spiral shell
Column position, as shown in Figure 5.Thermoelectric block body positioning plate 8 is covered on flexible printed circuit board 1 by positioning stud, and by 24
A N-type thermoelectric block body 11 and 24 p-type thermoelectric block body 10 is alternately disposed in flexible printed circuit board by thermoelectric block body positioning plate 8
On 1.After the completion of 24 pairs of N-type thermoelectric block bodies 11 and p-type thermoelectric block body 10 are placed, cover board 12, cover board are installed additional in thermoelectric block body upper end
12 corresponding stud positions are provided with circular hole, and stud is stretched out by circular hole, compressed cover board 12 and bottom plate 9 with nut.Fig. 6 is flexible temperature
Poor electric organ hot end assemble welding explosive view.
Structure after assembly is compressed is put into heating furnace and vacuumizes, and welds 3 minutes at 260 DEG C.It is cooling to vacuum drying oven
Afterwards, structure assembly clamped is taken out, and removes cover board 12, bottom plate 9 and thermoelectric block body positioning plate 8, obtains thermoelectric generator hot end
Part, as shown in Figure 7.
Three, the positioning of cold end conductive sheet and solder-coated
The cold end copper current-conducting piece 4 with a thickness of 0.3mm is made, sanding and polishing removes the greasy dirt and oxide layer on surface.Using three
Cold end copper current-conducting piece mold is processed in dimension printing, is provided with locating slot corresponding with thermoelectric block body position in mold, and cold end copper is conductive
Piece is placed in locating slot, and is adhesively fixed with the Kapton Tape of 50 μ m-thicks 13, as shown in Figure 8.
The solder-coated halftone of 0.12mm thickness is made, the aperture of halftone is corresponding with the position of cold end copper current-conducting piece 4.It is unleaded low
Warm solder 14 selects fusing point for 138 DEG C of Sn48Bi52.Unleaded solder 14 is sufficiently stirred, is passed through solder with scraper
Halftone is coated on cold end copper current-conducting piece 4, as shown in Figure 9.
Four, the welding of thermoelectric generator cold end and assembly
The cold end copper current-conducting piece for being coated with solder corresponds to the thermoelectric block body placement of thermoelectric generator cold end part；In cold end
The side that copper current-conducting piece pastes Kapton Tape 13 installs cover board additional, and cover board corresponds to stud position and is provided with circular hole, and stud passes through circle
Hole is stretched out, and is compressed cover board and bottom plate with nut.Figure 10 is flexible thermoelectric generator cold end assemble welding explosive view.
The structure that assembly compresses is put into heating furnace, is vacuumized, and is welded 3 minutes at 180 DEG C.After being cooled to room temperature,
Cover board 12 and bottom plate 9 are removed, the part being welded is impregnated 10 minutes in ethanol solution, Kapton Tape 13 is taken off, obtains
To flexible thermoelectric generator.
The present invention is passed through by proposing a kind of wearable thermoelectric generator and preparation method thereof with engraved structure substrate
Make thermoelectric generator that there is good flexibility using the flexible printed circuit board with hollow out, and processing uses thermoelectricity in hot end
Block positioning plate positions thermoelectric block body, to cold end copper current-conducting piece using 3 D-printing positioning and polyimides glue when cold end is processed
Band is fixed, ensure that thermoelectric block body is contacted with the good of conductive electrode.So that the flexible thermoelectric generator output performance of manufacture
It is higher, and the output power of thermoelectric generator can be promoted by increasing thermoelectric block body logarithm, expand answering for wearable device
Use occasion.
Finally, it is stated that: above embodiments are only to illustrate the present invention and not limit technical side described in the invention
Case, therefore, although this specification is referring to above-mentioned each embodiment, the present invention has been described in detail, ability
Domain it is to be appreciated by one skilled in the art that still can modify to the present invention or equivalent replacement, and all do not depart from this hair
The technical solution and its improvement of bright spirit and scope, should all cover within the scope of the claims of the present invention.
Claims (7)
1. a kind of wearable thermoelectric generator with engraved structure substrate, it is characterised in that: faced out from wearing, successively include
Flexible printed circuit board (1), thermoelectric block body array (3) and cold end copper current-conducting piece (4)；The hot end face of thermoelectric block body array (3) is logical
It crosses medium temperature solder to connect with the copper electrode upper surface of flexible printed circuit board (1), the cold end face of thermoelectric block body array (3) passes through low
Warm solder is connect with the lower surface of cold end copper current-conducting piece (4)；Thermoelectric block body array (3) have m row, m be even number and m >=2, often
Row passes through hot end flexibility containing four pairs of dimensions above and number p-type all the same and N-type thermoelectric block body, thermoelectric block body array (3)
Copper electrode and cold end copper current-conducting piece (4) the composition series connection of printed circuit board (1) or series and parallel structure；
The flexible printed circuit board (1) has engraved structure (2), the thermoelectricity of the quantity of engraved structure (2) according to the design needs
Depending on array line number, thermoelectric block body number and size.
2. it is used for a kind of production method of the wearable thermoelectric generator with engraved structure substrate described in claim 1,
It is characterized in that, comprising the following steps:
1) according to the job requirement of wearing occasion and external drive device, thermoelectric generator thermoelectric block body logarithm n and P, N-type are determined
N p-type and N-type thermoelectric block body is respectively cut into the p-type shaped and N-type thermoelectric material by the size of thermoelectric block body, and n >=
8；Two equal nickel plating in end face of the copper electrode and cold end copper current-conducting piece of thermoelectric block body and flexible printed circuit board welding are tin plating；
2) production has the flexible printed circuit board and solder-coated halftone of engraved structure, the halftone position of opening and flexible print
The copper electrode position of printed circuit board is corresponding, after unleaded medium temperature solder is sufficiently stirred, is scraped using silk-screen printing technique with metal
Knife scratches medium temperature solder on flexible printed circuit board by solder-coated halftone；
3) flexible printed circuit board for being coated with medium temperature solder is fixed on the bottom plate with screw hole, and bottom plate installs positioning stud additional
And washer；Thermoelectric block body positioning plate is made, aperture respectively corresponds thermoelectric block body and positioning stud position on the positioning plate, will be hot
Electric block positioning plate is covered on flexible printed circuit board by positioning stud；By n N-type thermoelectric block body and n p-type thermoelectricity block
Body is alternately disposed in the position that solder is had been coated on flexible printed circuit board by thermoelectric block body positioning plate；
4) cover board is installed additional in n exposed N-type thermoelectric block body and n p-type thermoelectric block body upper end, cover board corresponds to stud position and is provided with
Circular hole, stud are stretched out by circular hole, are compressed cover board and bottom plate with nut, the structure after assembly is compressed is put into heating furnace simultaneously
It vacuumizes, is welded；After vacuum drying oven is cooling, the structure that assembly is clamped is taken out, removal cover board and thermoelectric block body positioning plate,
Obtain thermoelectric generator hot end part；
5) cold end copper current-conducting piece is made, sanding and polishing removes the greasy dirt and oxide layer on surface, processes cold end copper using 3 D-printing
Conductive sheet mold is provided with locating slot corresponding with thermoelectric block body position in mold, cold end copper current-conducting piece is placed in locating slot,
And it is adhesively fixed with Kapton Tape；
6) solder is coated using the identical silk-screen printing technique of step 2)；
Wherein step 2) ~ 4) and step 5) ~ 6) carry out simultaneously, or separate and successively carry out；
7) the while placement that the thermoelectric block body when corresponding cold end part of cold end copper current-conducting piece coating solder is exposed；?
The side that cold end copper current-conducting piece pastes Kapton Tape installs cover board additional, and cover board corresponds to stud position and is provided with circular hole, and stud passes through
Circular hole stretches out, and compresses cover board and bottom plate with nut, the structure that assembly compresses is put into heating furnace, vacuumizes, is welded；
8) cover board and bottom plate are removed after cooling；Kapton Tape is removed using alcohol solution dipping, obtains wearable temperature difference hair
Electric appliance.
3. according to the method described in claim 2, it is characterized by: the flexible printed circuit board base material is that polyamides is sub-
Amine, N-type thermoelectric block body material are doped bismuth telluride base thermoelectricity material, and p-type thermoelectric block body material is doped bismuth telluride base thermoelectricity material
Material.
4. according to the method described in claim 2, it is characterized by: the thermoelectric material forming technology is Qu Rong, hot pressing or puts
Electric plasma agglomeration, thermoelectric block body cutting technique are wire cutting.
5. according to the method described in claim 2, it is characterized by: the solder-coated of the thermoelectric generator with a thickness of 0.05 ~
0.15 mm。
6. according to the method described in claim 2, it is characterized by: the thermoelectric generator be welded in vacuum furnace into
Row.
7. the method according to claim 2 or 6, it is characterised in that: the medium temperature solder is Sn96.5Ag3Cu0.5, welding temperature
Degree is 260 DEG C, and weld interval is 3 minutes；Solder is Sn48Bi52, welding temperature is 180 DEG C, and weld interval is 3 minutes.
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| CN108305935A (en) * | 2018-02-08 | 2018-07-20 | 南方科技大学 | Flexible thermo-electric device and preparation method |
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| CN109894712A (en) * | 2019-02-26 | 2019-06-18 | 摩比科技（深圳）有限公司 | A kind of welding method of welding fixture and resonator |
| CN110265538A (en) * | 2019-05-30 | 2019-09-20 | 清华大学 | Flexible thermoelectric generator and its preparation method and application system |
| CN110474570A (en) * | 2019-09-16 | 2019-11-19 | 桂林电子科技大学 | A kind of thermoelectric generator and preparation method thereof with flexible extendable structure |
| EP4070389A4 (en) * | 2019-12-06 | 2023-08-30 | 3M Innovative Properties Company | Flexible thermoelectric device |
| CN111403589B (en) * | 2020-03-27 | 2021-11-19 | 华中科技大学 | Method and die for manufacturing thermoelectric material with trapezoidal boss structure |
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| CN112349827A (en) * | 2020-11-06 | 2021-02-09 | 哈尔滨工业大学（深圳） | Wearable body temperature power generation module for continuous energy supply and preparation method |
| CN112751507B (en) * | 2020-12-10 | 2022-11-25 | 重庆大学 | Wearable human body thermoelectric generator based on galvanic couple framework and organic pouring and curing |
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