CN113991006A - Photo-thermal-thermoelectric charging device and preparation method thereof - Google Patents
Photo-thermal-thermoelectric charging device and preparation method thereof Download PDFInfo
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
- F24S80/65—Thermal insulation characterised by the material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/32—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from a charging set comprising a non-electric prime mover rotating at constant speed
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- H10N19/00—Integrated devices, or assemblies of multiple devices, comprising at least one thermoelectric or thermomagnetic element covered by groups H10N10/00 - H10N15/00
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Abstract
The invention discloses a photo-thermal-thermoelectric charging device, wherein a power generation module comprises a plurality of photo-thermal-thermoelectric generators which are connected in series or in parallel; the voltage stabilizing module is arranged such that one end is connected with the mobile phone and the other end is connected with the power generation module. The invention also relates to a preparation method of the photo-thermal-thermoelectric charging device. Under the sun, the open-circuit voltage and the short-circuit current of a single photo-thermal-thermoelectric device can respectively reach 290 mV and 28.8 mA; under sunlight, the power generation device can realize the superposition of voltage and current under the conditions of series connection and parallel connection; the device can stably operate under a plurality of sunlight and can effectively realize stable and efficient power generation. Through combining the power generation module with the boost module, the effective charging of the mobile phone can be realized under daily sunlight. In addition, the thermoelectric device and the voltage stabilizing and boosting module are low-cost commercial products and are easy to obtain.
Description
Technical Field
The invention belongs to the field of energy conversion functional devices, and particularly relates to a photo-thermal-thermoelectric charging device and a preparation method thereof.
Background
People have increasingly higher requirements on the quality of life, and devices which can directly and effectively capture solar energy to realize functional application are designed to play an indispensable role in modern life nowadays. In particular, how to reasonably utilize the energy of sunlight to drive photovoltaic cells and thermoelectric devices to obtain increasingly required electric energy is a subject of great attention. Although sunlight is an important energy source which is green water and can be continuously survived, the outdoor sunlight is weak in intensity and belongs to a low-grade heat source, so that the thermoelectric device cannot realize high-efficiency electric energy output under the sunlight. Therefore, the high-performance photothermal layer is designed at the heating end of the thermoelectric device to improve the capture of sunlight, so that the temperature of the heating end is increased, and the thermoelectric performance is improved.
Although previous research has overcome the problem of low photothermal performance to some extent, the preparation process is complex and requires high design cost, which is not favorable for large-scale commercial production of photothermal-thermoelectric devices, thereby hindering the development process thereof.
In summary, there is a need to design a photo-thermal-thermoelectric charging device suitable for large-scale commercial production, which has the characteristics of excellent thermoelectric performance, economic and convenient preparation process, and wide raw material sources.
Disclosure of Invention
In view of the above technical problems, the present invention provides a photo-thermal-thermoelectric charging device, which has stable thermoelectric performance output in a daily lighting state, and the open-circuit voltage and the short-circuit current of the device are respectively: 290 mV and 288 mA. After the three photo-thermal-thermoelectric generators in the structure are connected in series or in parallel, the open-circuit voltage and the short-circuit current of the three photo-thermal-thermoelectric generators can reach 630 mV and 48 mA respectively. The invention has stable high output power and can charge electronic products instantly.
The term "power generation module" of the present invention refers to a solar thermoelectric device that converts light energy into heat energy and further converts thermoelectricity into electric energy by irradiation of sunlight.
The term "voltage stabilizing module" refers to voltage conversion, which converts the electric energy of the thermoelectric device to the voltage for charging the terminal equipment.
An object of the present invention is to provide a photothermal-thermoelectric charging device.
A photo-thermal-thermoelectric charging device includes a power generation module and a voltage stabilization module;
wherein the content of the first and second substances,
the power generation module comprises a plurality of photo-thermal-thermoelectric generators which are connected in series or in parallel;
the voltage stabilizing module is connected with the mobile phone;
the voltage stabilizing module is arranged such that one end is connected with a terminal device to be charged and the other end is connected with the power generation module.
Further, the assembly of the generator comprises:
the photo-thermal material is a CB (carbon black)/PVDF (polyvinylidene fluoride) composite material;
a thermoelectric device;
the thermal insulation sleeve is made of plastic foam;
wherein the photothermal material is applied to a surface of the thermoelectric device; the heat-insulating sleeve is sleeved on the heat-generating end of the thermoelectric device, and the outer end of the heat-insulating sleeve is an opening.
The invention adopts blending of CB and PVDF as a composite material and aims to: PVDF is used as a binder, and CB is used as a photo-thermal layer to form a film of a photo-thermal material, and the film can be uniformly attached to the heating end of the thermoelectric device.
Further, the surface of the photothermal material has a porous microstructure, so that more sunlight can be absorbed.
Further, the thermal conductivity of the plastic foam is 30-40 mW−1 K−1。
The thermal conductivity is controlled within the range, and the purpose is that the lower the thermal conductivity is, the better the heat preservation effect is, and finally, the better the output performance of the device is.
Further, the voltage stabilizing module is a USB boost power supply voltage stabilizing module.
The USB boosting power supply voltage stabilizing module is selected, and the purpose of the USB boosting power supply voltage stabilizing module is voltage conversion, and the electric energy of the thermoelectric device is converted to reach the charging voltage of the mobile phone through the voltage.
Further, the porous microstructure has an average pore size of 2 to 5 μm, and is intended to allow light to pass through the pore size in the pore size range, and then refract and be absorbed by the photothermal material.
Another object of the present invention is to provide a method for manufacturing the above photothermal-thermoelectric charging device.
The preparation method of the photo-thermal-thermoelectric charging device comprises the following steps:
preparation of photothermal-thermoelectric generator:
s1, dissolving PVDF in a solvent, adding CB, mixing to obtain a mixed solution of CB/PVDF, and adding water to obtain a photo-thermal material precursor solution;
s2, applying the photo-thermal material precursor liquid to a thermoelectric device, and drying to obtain the thermoelectric device coated with the CB/PVDF composite material;
and S3, cutting the plastic foam into a specific size, and sleeving the plastic foam on the heating end of the thermoelectric device to be used as a heat-insulating sleeve to obtain the photo-thermal-thermoelectric generator.
Further, the solvent is acetone.
Acetone is used as a solvent, and the purpose of the acetone is that the acetone can dissolve PVDF, and when the photo-thermal material is naturally dried, the acetone is volatilized, and pore channels are left.
Further, the mass of the CB is 8-15 wt% of the PVDF.
The amount of CB added was maintained in this range, and the photothermal properties were the best.
Further, the wall thickness of the heat-insulating sleeve is 5-10 cm.
The thickness of the insulating sleeve is maintained in the range, and the insulating effect is optimal, namely the photothermal-thermoelectric device can realize the optimal output performance.
The invention has the following beneficial effects:
1. the photothermal-thermoelectric charging device prepared by the invention is coupled with a commercial device through a composite material of CB and PVDF, and through heat management, the photothermal conversion efficiency is fundamentally improved, effective photothermal power generation is realized, the stable thermoelectric performance output is realized, and the open-circuit voltage and the short-circuit current are respectively as follows: 290 mV and 288 mA. After the three photo-thermal-thermoelectric generators in the structure are connected in series or in parallel, the open-circuit voltage and the short-circuit current of the three photo-thermal-thermoelectric generators can respectively reach 630 mV and 48 mA, and the prepared device can realize the instant charging of electronic products under the irradiation of sunlight.
2. In addition, the designed photo-thermal-thermoelectric generator can still realize continuous and stable power generation function under different environments and different sunlight intensities; under the irradiation of sunlight, the mobile phone can be driven to charge by connecting the two devices in a series-parallel connection mode. The patent provides an alternative and promising scheme for the instant charging mode of modern electronic products.
3. The photo-thermal-thermoelectric charging device prepared by the invention has the advantages of simple preparation process, wide raw material source, low cost and large-scale preparation; and the simple method using water as an additive can realize the porous microstructure with adjustable aperture on the surface of the photo-thermal material.
Drawings
Fig. 1 (a) shows a schematic view of the structure of the photothermal-thermoelectric charging device of example 1;
fig. 1 (b) shows a schematic structural view of a thermoelectric device coated with a photothermal material in example 1;
fig. 2 shows a time-voltage diagram of the photothermal-thermoelectric generator of example 1;
fig. 3 (a) shows a time-voltage diagram of a series-connected photo-thermal-thermoelectric charging device of three photo-thermal-thermoelectric generators of example 1;
fig. 3 (b) shows a time-current diagram of a photothermal-thermoelectric charging device after parallel connection of three photothermal-thermoelectric generators of example 1;
fig. 4 is a graph showing thermoelectric output effects of the photothermal-thermoelectric charging device of example 1 at different ambient temperatures in test example 3;
fig. 5 is a graph showing the thermoelectric output effect of the photothermal-thermoelectric charging device of example 1 in windy environment (i.e., with and without the jacket) in test example 3;
fig. 6 is a graph showing thermoelectric output effects of the photothermal-thermoelectric charging device of example 1 at different solar intensities in test example 3;
fig. 7 shows a charging schematic of the photothermal-thermoelectric charging device of example 1 in test example 4.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following examples are given. The starting materials, reactions and work-up procedures which are given in the examples are, unless otherwise stated, those which are customary on the market and are known to the person skilled in the art.
The thermoelectric device adopts a thermoelectric device with the model of XH-F1541;
the voltage stabilizing module is a USB boosting power supply voltage stabilizing module;
in the present invention, the pore size of the surface of the composite material under the porous microstructure is measured by Scanning Electron Microscopy (SEM).
Example 1
A photo-thermal-thermoelectric charging device includes a power generation module and a voltage stabilization module;
wherein the content of the first and second substances,
the power generation module comprises three photo-thermal-thermoelectric generators which are connected in series;
the voltage stabilizing module is arranged to have one end connected with a terminal device to be charged and the other end connected with the power generation module, and the terminal device is a portable electronic product such as a mobile phone, a PAD, a notebook computer and the like.
The assembly of the generator comprises:
a photothermal material which is a composite material of CB/PVDF (CB: PVDF =8:100, m/m), the surface of which has a porous microstructure, the pores having an average pore diameter of 2 μm;
a thermoelectric device;
the thermal insulation sleeve is made of plastic foam, wherein the plastic foam is pearl cotton foam, and the thermal conductivity coefficient of the foam is 30 mW or more−1 K−1；
Wherein the photothermal material is applied to a surface of the thermoelectric device; the heat-insulating sleeve is sleeved on the heat-generating end of the thermoelectric device, and the outer end of the heat-insulating sleeve is an opening.
Fig. 1 shows a schematic view of the structure of the photothermal-thermoelectric charging device of example 1.
The preparation method of the photo-thermal-thermoelectric charging device comprises the following steps:
D1. preparation of photothermal-thermoelectric generator:
s1, dissolving PVDF in acetone (PVDF: acetone =1:30, m/m), adding CB (CB: PVDF =8:100, m/m), mixing to obtain a mixed solution of CB/PVDF, and adding water (PVDF: water =1:1, v/v) into the mixed solution, so that the pore size of the composite material formed later can be adjusted, and the photo-thermal material precursor solution is obtained;
s2, spraying the photo-thermal material precursor liquid onto a thermoelectric device, and drying to obtain the thermoelectric device coated with the CB/PVDF composite material;
and S3, cutting the plastic foam into a specific size, and sleeving the plastic foam on the heating end of the thermoelectric device to be used as a heat-insulating sleeve (the thickness is 5 cm) to obtain the photo-thermal-thermoelectric generator.
D2. Preparation of photothermal-thermoelectric charging device
And connecting the power generation module with one end of the voltage stabilization module, and connecting the other end of the voltage stabilization module with the mobile phone to obtain the photo-thermal-thermoelectric charging device.
Test example
In order to test the relevant performance of the photothermal-thermoelectric charging device obtained in example 1 above, the following tests were made.
Test example 1: thermoelectric conversion test
The photothermal-thermoelectric generator in the photothermal-thermoelectric charging device obtained in example 1 was subjected to a thermoelectric conversion test. The test method comprises the following steps: the photo-thermal-thermoelectric device is connected with a digital source meter by a lead, the digital source meter is connected with a computer through a USB interface, and the photo-thermal-thermoelectric device is arranged in one sun (one sun refers to the sun illumination intensity, and is 1 Kw/m)2) The real-time output voltage of 300 s is collected under the irradiation of (1). Finally, it is concluded that the stable output voltage of example 1 under a sunlight exposure reaches 290 mV, and the obtained results are shown in fig. 2.
Test example 2: thermoelectric output stability test
The photothermal-thermoelectric charging device obtained in example 1 was subjected to a series-parallel performance test. The test method comprises the following steps: the photo-thermal-thermoelectric device is connected with a digital source meter by a lead, the digital source meter is connected with a computer through a USB interface, and the digital source meter is arranged in sunlight (1 Kw/m)2) Under the irradiation of the three devices, the three devices are connected in series, and the real-time output voltage of 300 s is collected; in the same way, three devices are connected in parallel, and the real-time short-circuit current of 300 s is collected. The obtained results show that the output voltage and the short-circuit current are significantly increased in the case where the photothermal-thermoelectric charging device of example 1 is connected in series and in parallel, and the obtained results are shown in fig. 3 (a) and (b).
Test example 3: mobile phone charging performance test
The photothermal-thermoelectric charging device obtained in example 1 was subjected to a thermoelectric output stability test. The test method comprises the following steps: under the irradiation of sunlight, different environmental temperatures (0, 10 and 25 ℃) and wind environments (with or without a heat insulation sleeve) are changed, the photo-thermal-thermoelectric device is connected with the digital source meter by a lead, the digital source meter is connected with a computer through a USB interface, and the real-time output voltage of 300 s is acquired. The results are shown in FIGS. 4 and 5; similarly, the real-time output voltage of 300 s was collected at different solar intensities (1, 3, 5, 7 suns). The results are shown in FIG. 6. The above results indicate that the photothermal-thermoelectric charging device of example 1 can achieve stable and sustained thermoelectric output.
Test example 4: mobile phone charging performance test
The photothermal-thermoelectric charging device obtained in example 1 was subjected to a cell phone charging performance test. The test method comprises the following steps: two high-performance thermoelectric (with a photothermal layer and a heat insulation sleeve) devices are connected in series, one end of the voltage boosting and stabilizing module is connected with the devices, and the other end of the voltage boosting and stabilizing module is connected with a mobile phone data line, so that the mobile phone can be charged. The schematic diagram is shown in fig. 7. The above results show that the schematic charging diagram of the photo-thermal-thermoelectric charging device in embodiment 1 illustrates that the device can realize instant charging of a mobile phone under sunlight, and provides an alternative and promising approach for the instant charging technology of modern electronic products.
Example 2
Example 2 is basically the same as example except that: and CB, PVDF =15:100, m/m, the average pore diameter of the pores of the photothermal material is 5 mu m, and the wall thickness of the thermal insulation sleeve is 10 cm.
Through the test, the test results of the thermoelectric conversion test, the thermoelectric output stability test and the mobile phone charging performance test of the embodiment 2 are close to the test results of the embodiment 1, and the description is not repeated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A photo-thermal-thermoelectric charging device, comprising a power generation module and a voltage stabilization module;
wherein the content of the first and second substances,
the power generation module comprises a plurality of photo-thermal-thermoelectric generators which are connected in series or in parallel;
the voltage stabilizing module is arranged to have one end connected with a terminal device to be charged and the other end connected with the power generation module.
2. The photo-thermal-thermoelectric charging device according to claim 1, wherein the components of the generator comprise:
the photo-thermal material is a CB/PVDF composite material;
a thermoelectric device;
a thermal insulation sleeve;
wherein the photothermal material is applied to a surface of the thermoelectric device; the heat-insulating sleeve is sleeved on the heat-generating end of the thermoelectric device, and the outer end of the heat-insulating sleeve is an opening.
3. The photothermal-thermoelectric charging device according to claim 2, wherein the photothermal material surface has a porous microstructure.
4. The photothermal-thermoelectric charging device according to claim 2, wherein said thermal insulating jacket material is a plastic foam, and said plastic foam has a thermal conductivity of 30 to 40 mW, seed or seed−1 K−1。
5. The photo-thermal-thermoelectric charging device according to claim 1, wherein the voltage stabilization module is a USB boost power supply voltage stabilization module.
6. The photothermal-thermoelectric charging device according to claim 3, wherein the average pore diameter in the porous microstructure is 2 to 5 μm.
7. The method for manufacturing a photothermal-thermoelectric charging device according to any one of claims 1 to 6, wherein the method for manufacturing a photothermal-thermoelectric charging device comprises the steps of:
preparation of photothermal-thermoelectric generator:
s1, dissolving PVDF in a solvent, adding CB, mixing to obtain a mixed solution of CB/PVDF, and adding water to obtain a photo-thermal material precursor solution;
s2, applying the photo-thermal material precursor liquid to a thermoelectric device, and drying to obtain the thermoelectric device coated with the CB/PVDF composite material;
and S3, cutting the plastic foam into a specific size, and sleeving the plastic foam on the heating end of the thermoelectric device to be used as a heat-insulating sleeve to obtain the photo-thermal-thermoelectric generator.
8. The method for manufacturing a photothermal-thermoelectric charging device according to claim 7, wherein the solvent is acetone.
9. The method for manufacturing a photothermal-thermoelectric charging device according to claim 7, wherein the mass of CB is 8 to 15 wt% of PVDF.
10. The method for manufacturing a photothermal-thermoelectric charging device according to claim 7, wherein the wall thickness of the thermal insulating jacket is 5 to 10 cm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114915212A (en) * | 2022-04-29 | 2022-08-16 | 扬州大学 | Evaporation and power generation device based on spray type CB/PVDF material |
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| CN201616788U (en) * | 2008-10-29 | 2010-10-27 | 海德尔(开曼)有限公司 | Portable solar energy direct thermoelectricity generating set |
| CN201869133U (en) * | 2010-01-29 | 2011-06-15 | 中国科学院广州能源研究所 | Thermoelectric conversion type solar thermal power generation system |
| CN210183084U (en) * | 2019-08-12 | 2020-03-24 | 叶永飞 | Portable solar charger |
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| CN1699510A (en) * | 2004-05-21 | 2005-11-23 | 中国石油天然气股份有限公司 | Flame-retardant resin composition with positive resistance temperature coefficient |
| CN201616788U (en) * | 2008-10-29 | 2010-10-27 | 海德尔(开曼)有限公司 | Portable solar energy direct thermoelectricity generating set |
| CN201869133U (en) * | 2010-01-29 | 2011-06-15 | 中国科学院广州能源研究所 | Thermoelectric conversion type solar thermal power generation system |
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| CN114915212A (en) * | 2022-04-29 | 2022-08-16 | 扬州大学 | Evaporation and power generation device based on spray type CB/PVDF material |
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