CN108306426B - Laser wireless energy transmission system of double-sphere structure power sphere type photovoltaic receiver - Google Patents
Laser wireless energy transmission system of double-sphere structure power sphere type photovoltaic receiver Download PDFInfo
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- 229910000530 Gallium indium arsenide Inorganic materials 0.000 claims description 14
- KXNLCSXBJCPWGL-UHFFFAOYSA-N [Ga].[As].[In] Chemical compound [Ga].[As].[In] KXNLCSXBJCPWGL-UHFFFAOYSA-N 0.000 claims description 12
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- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 3
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 3
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- XBWAZCLHZCFCGK-UHFFFAOYSA-N 7-chloro-1-methyl-5-phenyl-3,4-dihydro-2h-1,4-benzodiazepin-1-ium;chloride Chemical compound [Cl-].C12=CC(Cl)=CC=C2[NH+](C)CCN=C1C1=CC=CC=C1 XBWAZCLHZCFCGK-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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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
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/30—Circuit arrangements or systems for wireless supply or distribution of electric power using light, e.g. lasers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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- Engineering & Computer Science (AREA)
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- Optics & Photonics (AREA)
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Abstract
The utility model provides a wireless energy transmission system of laser based on two spheroid structure power ball formula photovoltaic receiver, which comprises a laser, emitter, receiver, power ball photovoltaic receiver and power management module, emitter is settled to the output side of laser, receiver is settled to the emitter output side, receiver is connected with the power ball formula photovoltaic receiver that is used for converting laser signal into the signal of telecommunication, power ball formula photovoltaic receiver's output is connected with power management module, power ball formula photovoltaic receiver is two spheroid structure power ball formula photovoltaic receiver, two spheroid structure power ball formula photovoltaic receiver includes power ball photovoltaic receiver, the cooling ball, the check valve that admits air, the check valve and the gas tube of giving vent to anger, install the check valve that admits air on the power ball photovoltaic receiver and give vent to anger the check valve, the check valve that admits air communicates with the air inlet of cooling ball through the trachea, the check valve that gives vent to anger is connected with the gas outlet of cooling ball through the trachea. The invention has higher photoelectric conversion efficiency and good heat dissipation effect.
Description
Technical Field
The invention belongs to a wireless energy transmission system, in particular to a wireless energy transmission system adopting laser.
Background
With the rapid development of laser technology and solar cell technology, lasers gradually show their advantages in remote energy transmission technology, and the research of laser wireless energy transmission technology is mainly carried out in the countries such as the united states, japan and germany. There are few reports on the research of laser wireless energy transmission in China, and most of the researches are also in theoretical research or initial stage, and mainly are conducted on the problems of high-power lasers, gaussian beam shaping, photoelectric conversion efficiency of photocells and the like.
The output voltage of a single battery generally cannot meet the requirement of the load working voltage, and a photovoltaic receiver is usually required to be formed by a plurality of battery strings and parallel connection. The traditional flat-type photovoltaic receiver has a simple structure and has lower requirements on tracking precision. The converging lens is only added to converge the incident laser on the photovoltaic cell with a small area. The light intensity is improved, the using area of the photovoltaic cell is reduced, and the cost is greatly reduced, but the overall form is a flat plate. When the solar energy source is used in high-intensity and non-uniform laser irradiation, the optical power density received by each series-parallel photovoltaic cell is different, so that mismatch loss is possibly caused, the photoelectric conversion efficiency is reduced, and the whole performance of the system is limited. For the photovoltaic receiver used in the wireless energy transmission of the laser, the problem of non-uniform light intensity of the laser must be considered in the design process, and the sources of the problem are mainly non-uniformity of energy distribution of the laser beam and influence of the atmosphere.
The power spherical receiver 'traps' the incident laser in a relatively closed cavity, and realizes relatively uniform illumination through repeated reflection of the incident laser on the surface of the photovoltaic cell, so that the problem of nonuniform laser intensity distribution is avoided; and the light without absorption can be repeatedly utilized through multiple reflections, so that the energy of the incident radiation is fully absorbed, and the energy output efficiency of the whole laser wireless energy transmission system is improved. However, the tightness of the structure is improved, the heat dissipation problem is outstanding under the irradiation of high-power laser, and meanwhile, the size of the opening of the power ball is limited, so that the tracking precision of the laser emitting device is required to be high.
Disclosure of Invention
In order to solve the problems of low photoelectric conversion efficiency, difficult heat dissipation and the like of a power spherical receiver used in a laser wireless energy transmission system, the invention provides a laser wireless energy transmission system based on a double-sphere structure power spherical photovoltaic receiver, which has high photoelectric conversion efficiency and actively dissipates heat.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a wireless energy transmission system of laser based on two spheroid structure power ball formula photovoltaic receiver, the system includes laser instrument, emitter, receiving arrangement, power ball photovoltaic receiver and power management module, emitter is settled to the laser instrument output side, emitter output side is settled there is receiving arrangement, receiving arrangement with be used for turning laser signal into the power ball formula photovoltaic receiver of electric signal and be connected, the output of power ball formula photovoltaic receiver with power management module is connected, power ball formula photovoltaic receiver is two spheroid structure power ball formula photovoltaic receiver, two spheroid structure power ball formula photovoltaic receiver includes power ball photovoltaic receiver, cooling ball, air inlet check valve, air outlet check valve and trachea, install on the power ball photovoltaic receiver air inlet check valve and air outlet check valve, the air inlet check valve pass through the trachea with the air inlet of cooling ball communicates, the air outlet check valve passes through the trachea with the gas outlet of cooling ball meets.
Further, the check valve that admits air, go out the check valve and be the check valve that is, the check valve includes valve body, die-pin, sealing washer, baffle and spring, be equipped with the valve opening that the air feed gas flows in the valve body, arrange the sealing washer on the baffle, the baffle with the valve opening cooperation, the baffle can slide from top to bottom the suit on the die-pin, the die-pin is fixed at the valve body inner chamber, the baffle is connected with the one end of spring, the other end of spring is fixed the bottom of die-pin.
Still further, the power ball photovoltaic receiver adopts a closed sphere structure, and the hollow sphere is filled with CO2 or N2 or Xe macromolecular gas; the incident laser enters the hollow sphere in the power sphere photovoltaic receiver, and the laser irradiates a photovoltaic cell at a certain position on the inner wall at a set angle, wherein the photovoltaic cell is made of monocrystalline silicon, polycrystalline silicon, gaAs or indium gallium arsenide (InGaAs) materials, and the band gap width of the photovoltaic cell is matched with 808nm wavelength or 1000nm laser.
The receiving device adopts a conical structure, and the diameter of the receiving end face facing the direction of the laser is large; the side surface of the receiving device is plated with a 808nm or 1000nm high-reflection film, and after the incident laser is reflected by the side surface, the incident laser is injected into the power ball photovoltaic receiver through the small end surface output port.
The transmitting device adopts a Galilean multiple beam expander, the beam expander consists of two lenses, the lens comprises an input concave lens and an output convex lens, the input lens transmits a virtual focus light beam to the output lens, and the two surfaces of the two lenses are plated with 808nm or 1000nm narrow-band antireflection films.
The laser adopts 808nm wavelength laser as a light source for laser wireless energy transmission, and adopts a GaAs solar cell.
The laser adopts a diode pumped solid laser and adopts an indium gallium arsenide InGaAs solar cell with high conversion efficiency at the laser wavelength of 1000 nm.
The power management module comprises a voltage stabilizing and controlling system, a microminiature step-up/step-down controller chip is adopted, and any direct-current voltage of 0.9V-5V is input; for reducing the output voltage of the photovoltaic cell unit with higher irradiation light intensity, and increasing the output voltage of the photovoltaic cell unit with insufficient irradiation light intensity.
The technical conception of the invention is as follows: the laser wireless energy transmission system based on the double-sphere structure power sphere type photovoltaic receiver provided by the invention adopts the double-sphere structure of the power sphere type photovoltaic receiver and the cooling sphere, and the sphere is filled with macromolecule diameter gas as a cooling medium, so that the temperature of the gas in the receiver sphere is increased and expanded due to the irradiation of laser, and the self-circulation flow of thermal expansion and cold contraction is formed by the laser and the cooling gas for cooling the sphere, thereby taking away the heat in a photovoltaic cell, reducing the heat accumulation in the photoelectric conversion process and improving the photoelectric conversion efficiency. And proper macromolecular gas is selected, so that the molecular diameter of the macromolecular gas is close to the laser wavelength, the scattering effect of incident light in the gas is improved, the uniformity of the incident laser can be further improved, and the mismatch loss caused by different optical power densities received by the photovoltaic cell is reduced. The cone-shaped receiving device solves the problem that the small power ball opening has high requirements on tracking precision of the laser emitting device.
The beneficial effects of the invention are mainly shown in the following steps: 1. the double-ball structure of the power ball photovoltaic receiver and the cooling ball is adopted, and macromolecule diameter gas is filled in the ball body to serve as a cooling medium, so that the problem of heat dissipation caused by tightness of the power ball receiver under high-power laser irradiation is solved, and the problem of high tracking precision requirement of the laser emission device due to the fact that the opening of the power ball is too small is solved by the conical receiving device. The scattering effect of the macromolecular gas further improves the uniformity of laser before photoelectric conversion, and ensures that each photovoltaic cell can uniformly obtain radiation illumination; 2. the power balls are filled with macromolecular gas, so that the scattering capacity of the radiation laser can be increased, the uniformity of the incident radiation is improved, the incident laser is reduced to be concentrated on part of the photovoltaic cells at a certain moment, the light absorption capacity of the photovoltaic cells is improved, the possibility that each photovoltaic cell obtains uniform optical power density is increased, and mismatch loss caused by different optical power densities received by the photovoltaic cells is reduced; 3. the cone-shaped receiving device is adopted, so that the receiving end face is large, more lasers can be received, and the requirements on alignment and tracking precision of the transmitting device are reduced. The side total reflection structure of the receiving device ensures that the received laser energy is injected into the power ball from the small end face output port, and meanwhile, the small-caliber injection port can reduce the occupation of limited receiving space by a non-photovoltaic cell, increase the photoelectric conversion area and improve the transmission voltage; 4. the mode of adopting two spheroids and the one-way check valve that are full of gas to laser is as the driving source, forms the gaseous self-loopa of one-way flow through expend with heat and contract with cold, and rethread cooling ball has increased the gas cooling area, accelerates the reduction of gas temperature. The continuous inflow of cold gas can take away heat in the photovoltaic cell, so that heat accumulation in the photoelectric conversion process is reduced, the heat dissipation efficiency of the power ball is improved, the photoelectric conversion environment is improved, and the photoelectric conversion efficiency is improved; 5. the double-sphere structure adopts laser as a driving source for circulating cooling, so that waste energy of laser converted heat is fully utilized, an active heat dissipation system of a laser wireless energy transmission system can be driven without external energy supply, the heat dissipation efficiency and the energy utilization rate of the system are improved, and the heat emission is reduced; 6. when the incident laser irradiates a certain position on the inner wall, light is absorbed by the silicon material, photon energy is transferred to silicon atoms to generate certain power output, and residual laser is transferred to the other inner wall position of the hollow sphere through reflection, so that the incident laser is continuously absorbed and reflected by the photovoltaic cell. Therefore, the photovoltaic device can generate photo-generated voltage in the photovoltaic cell, can realize the repeated utilization of laser on the surface of the photovoltaic cell in a relatively closed cavity, and improves the overall efficiency of photoelectric conversion of the photovoltaic receiver; 7. the incident light and the reflected light of different angles are irradiated to different positions on the inner wall, so that each point on the inner wall of the hollow sphere is irradiated by the light of different angles from the laser light source, the light intensity distribution of each point is formed by the sum of a plurality of light rays, namely, the light intensity of each point on the inner wall of the hollow sphere is the integral of the light of different angles from the laser, the effect of light integration is achieved, the interference effect of the original laser light source is greatly destroyed, and the uniform distribution of the laser energy is realized. The problems of transmission energy loss, low electric energy output efficiency and the like caused by different photo-generated current and voltage due to uneven laser energy distribution are solved; 8. the laser wireless charging mode is adopted, and the wireless charging device has the characteristics of long transmission distance, high transmission efficiency, small receiving device, high charging speed, high efficiency and the like. The attenuation of the transmission efficiency of the device along with the transmission distance is very small, and the energy loss of laser transmission within 10 meters is less than 1%; 9. the semiconductor laser or the diode pumped solid laser is used as a wireless charging light source, and the wireless charging light source has the advantages of light weight, reliable operation, low power consumption, high efficiency, small volume and good portability. The beam density and the wavelength of the 808nm wavelength semiconductor laser and the 1064nm wavelength diode pumped solid laser are respectively matched with the energy gap widths of photocell plates of GaAs materials and indium gallium arsenide (InGaAs) materials, so that the photoelectric conversion efficiency is high, and the heat loss is small; 10. the charging control circuit adopts a voltage stabilizing and controlling system and is used for increasing the over-low output voltage and reducing the over-high output voltage, so that the output voltage difference value range between each photovoltaic battery unit is ensured to be smaller, and the output efficiency of the photovoltaic receiver is improved. The power supply circuit has the advantages of small volume, high power density, high efficiency, high reliability, simple circuit structure, perfect functions and the like.
Drawings
Fig. 1 is a schematic diagram of a dual sphere structure power sphere type photovoltaic receiver.
Fig. 2 is a structural view of the check valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a laser wireless energy transmission system based on a double-sphere structure power sphere type photovoltaic receiver comprises a laser 1, a transmitting device 2, a receiving device 3, a power sphere photovoltaic receiver 4, an air inlet check valve 5, an air outlet check valve 6, a power management module 7, a terminal device 8, an air pipe 9 and a cooling sphere 10;
the laser 1 adopts a laser with 808nm wavelength as a light source for laser wireless energy transmission. The wavelength of 808nm of the semiconductor laser is exactly matched with the band gap width of a photovoltaic cell of the GaAs material, and the photoelectric conversion efficiency can reach 50 percent, so that the GaAs is preferably adopted for 4 (power sphere photovoltaic receiver) in a wireless energy transmission system adopting the laser with 808nm wavelength.
The laser 1 can also adopt a diode pumped solid laser, and the solid laser has the characteristics of small volume, long service life, reliable operation and the like, has higher output power (such as 100 kw), can keep the advantages of higher emissivity and the like under high power, and is suitable for laser wireless energy transmission. It is noted that the laser wavelength generated by the diode pumped solid state laser is larger than 1000nm, and the photoelectric conversion efficiency is low in this wavelength band for solar panels commonly using Si and GaAs materials, so that an indium gallium arsenide (InGaAs) solar cell with high conversion efficiency at the laser wavelength of 1000nm (the photoelectric conversion efficiency at 1000nm is 50%) is required.
The transmitting device 2 adopts a Galileo type multiple beam expander which consists of two lenses, wherein the lens comprises an input concave lens and an output convex lens, the input lens transmits a virtual focus light beam to the output lens, and the two surfaces of the two lenses are plated with 808nm or 1000nm narrow-band antireflection films, so that the light transmittance of laser is increased. The beam expander has the function of converting the laser beam emitted by the laser 1 into a laser spot shape meeting the laser transmission requirement, namely, collimating the laser, reducing the divergence angle of the laser beam, adjusting the laser spot size and ensuring that the transmitted laser energy completely enters the power sphere photovoltaic receiver 4.
The receiving device 3 adopts a conical structure, the diameter of the receiving end face towards the direction of the laser is large, the receiving area is large, so that the laser can be received more, the transmitting end is relatively easy to align to the receiving end face, the problem of limitation of small power ball opening is solved, and the requirement on the tracking precision of the laser transmitting device is reduced. The side surface of the receiving device 3 is plated with a 808nm or 1000nm high-reflection film, and after the incident laser is reflected by the side surface, the incident laser is injected into the power ball photovoltaic receiver 4 through a small end surface output port. The purpose of the miniport design is to reduce the occupation of limited receiving space by non-photovoltaic cells, increase the receiving area of the power balloon photovoltaic receiver 4 and reduce the occupation of limited receiving space by other factors.
The incident laser enters the hollow sphere in the power sphere photovoltaic receiver 4, and the laser irradiates a photovoltaic cell at a certain position on the inner wall at a certain angle, wherein the photovoltaic cell can be made of monocrystalline silicon, polycrystalline silicon, gaAs, indium gallium arsenide (InGaAs) and other materials, the band gap width of the photovoltaic cell is exactly matched with 808nm wavelength or 1000nm laser, and the photovoltaic cell has high photoelectric conversion efficiency. When a part of the light irradiates the pn junction, electron-hole pairs are generated, carriers generated near the semiconductor junction reach the space charge region without being recombined, electrons flow into the n region and holes flow into the P region by the attraction of a built-in electric field, and as a result, excessive electrons are stored in the n region, excessive holes are not generated in the P region, and a photo-generated electric field opposite to the potential barrier direction is formed near the pn junction. The residual laser is reflected on the inner wall of the position, so that the laser propagation direction is changed, the laser irradiates the other inner wall of the hollow sphere, and the absorption and reflection processes are performed again, so that the absorption and reflection processes are similar, namely, the incident laser is confined in a relatively closed cavity, the recycling of the incident laser on the surface of the photovoltaic cell is realized, and the overall efficiency is improved. Meanwhile, incident light and reflected light with different angles irradiate different positions on the inner wall to form a plurality of secondary light sources, so that the effect of light integration is achieved, and the uniform distribution of laser energy is realized. The problems of transmission energy loss, low electric energy output efficiency and the like caused by different photo-generated current and voltage due to uneven laser energy distribution are solved. The photovoltaic receiver has the advantages of simple structure, stable performance, durability, high utilization rate, ideal dodging effect and the like.
The power sphere photovoltaic receiver 4 adopts a closed sphere structure, the hollow sphere is filled with macromolecular gases such as CO2, N2 or Xe, and the like, when incident laser passes through the inside of the sphere, molecules such as CO2, N2, xe, and the like are encountered, a part of laser radiation propagates in all directions by taking particles as the center, the direction of the part of radiation is changed, and the closer the diameter of air molecules and the wavelength of the laser are, the more the scattering is. The incident laser is not concentrated on part of the photovoltaic cells, the possibility that each photovoltaic cell obtains uniform optical power density is further increased, and mismatch loss caused by different optical power densities received by the photovoltaic cells is reduced.
The inlet check valve 5 and the outlet check valve 6 are both one-way valves, as shown in fig. 2: consists of 5-1 (valve body), 5-2 (supporting rod), 5-3 (sealing ring), 5-4 (baffle plate) and 5-5 (spring), and can ensure unidirectional flow of gas. When the incident laser irradiates the gas, the temperature of the gas rises and expands, the pressure in the sphere increases, the 5-5 (spring) is compressed, the 5-4 (baffle) is jacked up and drives the 5-3 (sealing ring), and the expanded gas enters the gas pipe 9 through the middle hole, so that the pressure of the gas in the power sphere photovoltaic receiver 4 is reduced. The discharged high-temperature gas passes through the gas pipe 9 and the cooling ball 10 to generate air cooling, and the temperature is reduced.
The cooling bulb 10 receives a high temperature gas, which increases but does not change in volume, so the pressure in the chamber increases. Once the air pressure of the two spheres is the same, part of air in the power sphere photovoltaic receiver 4 continuously flows out due to inertial flow, so that the pressure in the cavity of the cooling sphere 10 is higher than that of the power sphere photovoltaic receiver 4, and then the cold air of the cooling sphere 10 enters the power sphere photovoltaic receiver 4 through the air outlet check valve 6 to cool the photovoltaic cell, so that the temperature in the cavity of the power sphere photovoltaic receiver 4 is reduced. Continued laser incidence causes the incoming cold gas to eventually turn into a hot gas again, and the pressure in the power sphere photovoltaic receiver 4 increases again. The self-circulation of heat expansion and cold contraction of unidirectional flow is formed by continuous circulation, so that heat in the photovoltaic cell is taken away, heat accumulation in the photoelectric conversion process is reduced, and the photoelectric conversion efficiency is improved.
The power management module 7 comprises a voltage stabilizing and control system. A microminiature step-up/step-down controller chip is adopted to input any direct-current voltage of 0.9V-5V, so that stable direct-current voltage output can be obtained. The power supply circuit has the advantages of high conversion efficiency, small volume, high power density, high reliability, simple circuit structure, perfect functions and the like. The method is used for reducing the output voltage of the photovoltaic cell unit with higher irradiation light intensity and increasing the output voltage of the photovoltaic cell unit with insufficient irradiation light intensity, so that the output voltage difference between the photovoltaic cell unit and the photovoltaic cell unit is reduced, and the output efficiency of the photovoltaic receiver is improved.
The integrating sphere type photovoltaic receiver 4 converts laser signals into electric signals, and the electric signals realize remote wireless charging of the terminal equipment 8 after voltage stabilization control of the power management module 7.
Claims (5)
1. The utility model provides a wireless energy transmission system of laser of two spheroid structure power ball formula photovoltaic receiver, the system includes laser instrument, emitter, receiving arrangement, power ball photovoltaic receiver and power management module, emitter is settled to the output side of laser instrument, emitter output side is settled there is receiving arrangement, receiving arrangement is connected with the power ball formula photovoltaic receiver that is used for converting laser signal into the electrical signal, the output of power ball formula photovoltaic receiver with power management module connects, its characterized in that: the power ball type photovoltaic receiver is a double-sphere structure power ball type photovoltaic receiver, the double-sphere structure power ball type photovoltaic receiver comprises a power ball type photovoltaic receiver, a cooling ball, an air inlet check valve, an air outlet check valve and an air pipe, the air inlet check valve and the air outlet check valve are arranged on the power ball type photovoltaic receiver, the air inlet check valve is communicated with an air inlet of the cooling ball through the air pipe, and the air outlet check valve is connected with an air outlet of the cooling ball through the air pipe;
the air inlet check valve and the air outlet check valve are one-way valves, the one-way valves comprise a valve body, a support rod, a sealing ring, a baffle and a spring, a valve hole through which air flows is formed in the valve body, the sealing ring is arranged on the baffle, the baffle is matched with the valve hole, the baffle can be sleeved on the support rod in a vertically sliding manner, the support rod is fixed in an inner cavity of the valve body, the baffle is connected with one end of the spring, and the other end of the spring is fixed at the bottom of the support rod;
the power ball photovoltaic receiver adopts a closed sphere structure, and the hollow sphere is filled with CO2 or N2 or Xe macromolecular gas; incident laser enters an internal hollow sphere of the power sphere photovoltaic receiver, and the laser irradiates a photovoltaic cell at a certain position on the inner wall at a set angle, wherein the photovoltaic cell is made of monocrystalline silicon, polycrystalline silicon, gaAs or indium gallium arsenide InGaAs material, and the band gap width of the photovoltaic cell is matched with 808nm wavelength or 1000nm laser;
the receiving device adopts a conical structure, the diameter of the receiving end face towards the direction of the laser is large; the side surface of the receiving device is plated with a 808nm or 1000nm high-reflection film, and after the incident laser is reflected by the side surface, the incident laser is injected into the power ball photovoltaic receiver through the small end surface output port.
2. The laser wireless energy transmission system of the double sphere structure power sphere type photovoltaic receiver of claim 1, wherein: the transmitting device adopts a Galilean multiple beam expander, the beam expander consists of two lenses, the lens comprises an input concave lens and an output convex lens, the input lens transmits a virtual focus light beam to the output lens, and the two surfaces of the two lenses are plated with 808nm or 1000nm narrow-band antireflection films.
3. The laser wireless energy transmission system of the double sphere structure power sphere type photovoltaic receiver of claim 1, wherein: the laser adopts 808nm wavelength laser as a light source for laser wireless energy transmission, and adopts a GaAs solar cell.
4. The laser wireless energy transmission system of the double sphere structure power sphere type photovoltaic receiver of claim 1, wherein: the laser adopts a diode pumped solid laser and adopts an indium gallium arsenide InGaAs solar cell with high conversion efficiency at the laser wavelength of 1000 nm.
5. The laser wireless energy transmission system of the double sphere structure power sphere type photovoltaic receiver of claim 1, wherein: the power management module comprises a voltage stabilizing and controlling system, a microminiature step-up/step-down controller chip is adopted, and any direct-current voltage of 0.9V-5V is input; the method is used for reducing the output voltage of the photovoltaic cell unit with higher irradiation light intensity and increasing the output voltage of the photovoltaic cell unit with insufficient irradiation light intensity.
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| CN101752780A (en) * | 2008-12-07 | 2010-06-23 | 刘娟明 | Axial fast flow gas laser device |
| CN107769723A (en) * | 2017-11-06 | 2018-03-06 | 浙江工业大学 | Integrating sphere type photovoltaic receiver device for laser radio charging |
| CN207968090U (en) * | 2018-03-14 | 2018-10-12 | 浙江工业大学 | Laser radio energy transmission system based on double sphere structure power ball-type photovoltaic receivers |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101752780A (en) * | 2008-12-07 | 2010-06-23 | 刘娟明 | Axial fast flow gas laser device |
| CN107769723A (en) * | 2017-11-06 | 2018-03-06 | 浙江工业大学 | Integrating sphere type photovoltaic receiver device for laser radio charging |
| CN207968090U (en) * | 2018-03-14 | 2018-10-12 | 浙江工业大学 | Laser radio energy transmission system based on double sphere structure power ball-type photovoltaic receivers |
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