72results about How to "Guaranteed photoelectric conversion efficiency" patented technology

The invention discloses sliver electrode slurry for a back electric field of a silicon solar cell and a preparation method thereof, and the silver electrode slurry for the back electric field of the silicon solar cell comprises the following components by weight percent: 60-70% of spherical silver powder, 0-5% of flaky silver powder, 2-6% of glass powder with a high-temperature softening point, 1-3% of glass powder with a low-temperature softening point and 20-30% of organic bonding agent. The particle size of the spherical silver powder is 0.5-2.5 mu m, and the tap density is above 4.5g / ml; the particle size of the flaky silver powder is below 5 mu m, and the tap density is above 4.0g / ml; and the glass powder with the high-temperature softening point is a PbO3-B2O3-SiO2-ZnO glass system, and the glass powder with the low-temperature softening point is a Bi2O3-B2O3-SiO2 glass system. The slurry is applied to a sliver electrode of the back electric field of the silicon solar cell; furthermore, after fast high-temperature sintering by a chained belt furnace, the adhesive capability is strong, the soldering resistance is good and the photoelectric conversion efficiency of a product is high.

The invention discloses a graphene / iron-nickel sulfo-spinel composite catalyst, and the composite catalyst comprises graphene oxide serving as a substrate, and iron-nickel sulfide which is in in-situ growth on graphene and is in a spinel structure. The atom ratio of iron, nickel and sulfur in the iron-nickel sulfide is x: (3-x): 4, wherein x is greater than zero and less than three. The invention also provides a preparation method for the composite catalyst, and a method for preparing a dye-sensitized solar cell. The composite catalyst is ingenious in design, is simple in manufacturing technology, well solves problems that a non-platinum system catalyst is low in catalytic efficiency and a platinum catalyst is high in cost, and can meet the demands of the industrial production well. Therefore, the composite catalyst is wide in application range, and is very suitable for large-scale production.

The invention provides an MWT solar battery and a manufacturing method of the MWT solar battery. The manufacturing method of the MWT solar battery comprises the following steps that antireflection films in a designated area on the back face of a substrate of the MWT solar battery are removed through laser to form an non-antireflection film area; the substrate of the MWT solar battery is placed into a strong alkaline solution to be cleaned, and the back field of the non-antireflection film area, laser damage and material passing hole interior damage are removed. In the manufacturing method of the MWT solar battery, the antireflection films which are needed in MWT solar battery production are used as masks, therefore other masks do not need to be manufactured additionally, and extra processes, equipment and materials do not need to be added. Compared with the prior art, the MWT solar battery is high in process integration degree, simple in process and beneficial to cost controlling.

The invention belongs to the technical field of solar energy utilization, and provides a rectangular photovoltaic power generation and heat collection module. The power generation and heat collection module consists of a solar cell panel, a heat pipe, a flat heat absorption fin integrated with the heat pipe, a heat insulation layer and a shell; the solar cell panel is stuck above the flat heat absorption fin integrated with the heat pipe through heat conduction and insulation glue; the evaporation section of the heat pipe is positioned at the back of the solar cell panel; the heat insulation layer is positioned under the flat heat absorption fin integrated with the heat pipe; the upper surface of the solar cell panel is adhered to a toughened glass plate of which light transmittance is more than or equal to 90 percent by adopting EVA; the solar cell panel, the heat pipe, the flat heat absorption fin integrated with the heat pipe and the heat insulation layer are arranged on the shell of the module in turn; the shell is also provided with a section of heat convergence pipe vertical to the heat pipe; the condensation section of the heat pipe is inserted into a blind hole of the heat convergence pipe; and the length of the heat convergence pipe is smaller than or equal to the width of the rectangular photovoltaic building module. The photovoltaic power generation and heat collection module integrates the functions of power generation and heat collection.

The invention provides a preparation method of a slice battery, the slice battery and a photovoltaic module. The preparation method comprises the following steps of providing a silicon wafer; cuttingthe silicon wafer to obtain a plurality of separated sub-silicon wafers with preset sizes; and manufacturing the slice battery by taking the sub-silicon slices as substrates. According to the preparation method of the slice battery, the silicon substrate is cut into the plurality of separated sub-silicon wafers in advance, and the slice battery is prepared by taking each sub-silicon wafer as the substrate, so that secondary damage to the slice battery caused by subsequent breaking or cracking can be avoided, the yield of the slice battery is improved, and the photoelectric conversion efficiency of the battery is improved. In addition, through the method, the preparation difficulty and the preparation cost of the high-main-grid slice battery can be reduced while the battery damage is reduced, and the batch production of the high-main-grid slice battery is realized.

The invention discloses a back electrode structure. The back electrode structure comprises at least one back silver main gate, a plurality of parallel aluminum gate lines and an aluminum gate outer frame, wherein an overlapped and connected region is formed between the aluminum gate lines and the back silver main gate; the overlapped and connected region is wound around the periphery of the back silver main gate; in the overlapped and connected region, the back silver main gate is covered with the aluminum gate lines; each back silver main gate comprises at least two back silver sub main gates; a disconnection section is formed between every two back silver sub main gates; at least one connecting line is arranged in the disconnecting region; the back silver sub main gates are connected mutually through the corresponding connecting line; the back silver sub main gates is connected with the aluminum gate outer frame through the corresponding connecting line; or each back silver main gate is provided with at least one hollow-out part. Correspondingly, the invention also discloses a P type PERC two-sided solar battery adopts the back electrode structure. The battery is simple in structure, relatively low in cost, high in electrical conductivity, and high in photoelectric conversion efficiency.

The invention discloses a solar cell module and a preparation method thereof. The solar cell module comprises an upper glass board, a front adhesive film layer, a solar cell array, a back adhesive film layer and a backboard which are laminated in turn. The backboard is a water vapor insulating backboard. Water vapor transmittance of the water vapor insulating backboard is less than 0.1mg / m<2> / day. The solar cell array includes multiple cells and conductive wires. The adjacent cells are connected via the conductive wires. The front surface of each cell is provided with secondary gate lines. The conductive wires are welded with the secondary gate lines via a welding layer. The welding layer contains alloys which include Sn and Bi. According to the solar cell module, the connecting effect of the conductive wires and the cells can be enhanced so that photoelectric conversion efficiency can be guaranteed. Besides, the welded layer can be effectively sealed on the upper glass board, the front adhesive film layer, the back adhesive film layer and a lower glass or metal board so that the cell array can be effectively protected, attenuation of the solar cell module can be alleviated and the service life can be prolonged.

The invention discloses a method for preparing double acid etching textures on a polycrystalline silicon surface. Different from the previous process, the method can solve the problem of non-uniformity of silicon slice etching pits, further solves the problem of color difference of a solar cell after PECVD (plasma enhanced chemical vapor deposition) coating, and optimizes the appearance of the solar cell. The first acid etching texture is characterized by low temperature and short time, a mechanical damage layer on the surface of a silicon slice is effectively removed by controlling the concentration of etching reaction liquid components, and small etching pits are formed. The second texture is characterized by high temperature and long time, and large and uniform etching pits are formed on the surface of the silicon slice. By the method, the shortcoming of non-uniformity of the etching pits in the traditional process is effectively overcome, the problem of color difference of the solar cell after PECVD coating is solved, and the production cost is not increased.

The invention discloses a profile for forming a solar photovoltaic component border. The profile can stabilize the photoelectric conversion efficiency of a solar photovoltaic component. The inner side of the profile is provided with a bayonet for arranging a solar cell component, and the downsun surface of the profile is a mounting surface. A mounting cavity is formed between the mounting surface and the bayonet. At least one air vent is formed on the sunny surface of the profile, and is communicated with the mounting cavity. When the solar photovoltaic component border formed by the profile provided by the invention is used, heat on the back of the solar cell component can be smoothly discharged by the air vent without causing the continuous rising of temperature of the solar cell component, thereby ensuring the photoelectric conversion efficiency of the solar cell component.

The invention discloses a method for preparing a silicon solar cell positive electrode and the main grid paste of the silicon solar cell positive electrode, and relates to the technical field of the manufacturing processes and the materials of electronic devices. The method for preparing the silicon solar cell positive electrode comprises the steps that 1) the electrode of a main grid and the electrode of a thin grid are respectively printed through two times of silk-screen printing; 2) different paste with silver or silver paste is adopted when the electrode of the main grid and the electrode of the thin grid are printed; 3) after sintering, the thickness of the electrode of the main grid is smaller than that of the electrode of the thin grid. The method can ensure the good dispersion of all components, even and soft silver electrode paste is obtained after rolling, and a silicon solar cell product is made to have good, stable and even electrical performance after the sintering.

The invention discloses a method for producing a sectional material of a frame of a solar photovoltaic module. The method for producing the sectional material of the frame of the solar photovoltaic module comprises the following steps that (a) materials are selected and prepared, (b) an upper frame body is manufactured, (c) a lower frame body is manufactured, (d) welding is conducted, and (e) post-treatment is conducted. According to the method for producing the sectional material of the frame of the solar photovoltaic module, working procedures are set appropriately, operation is easy and convenient, the manufactured sectional material is high in strength, use performance is stable, a through hole structure machined in the upper surface of the sectional material can effectively increase the illuminated area of a solar cell assembly, the photoelectric conversion efficiency of the solar cell assembly is guaranteed, the weight and the material consumption of the sectional material of the frame are effectively reduced, and the production cost of the sectional material is controlled.

The invention discloses a production method for a solar cell panel, and the method comprises the steps: putting a tempered glass plate, a packaging glue layer, a battery pack, a packaging glue layer and a backboard, which are all stacked sequentially, into a vacuum laminating machine, carrying out the hot-pressing of the solar cell pack, taking out the formed solar cell pack, and adding a frame and a wiring box to manufacture a solar cell panel; A thermal insulation plate is added in the stacking process for thermal insulation and calibration, and a battery string is carried through a Bernoulli sucking disc. The interior of the wiring box is provided with a bypass diode, thereby guarantee the connection of a circuit. The method is reasonable in design, achieves the operation optimization of the carrying, layout, welding and wiring of a battery piece, improves the quality of a product, and guarantees the photoelectric conversion efficiency of the solar cell panel.

The embodiment of the invention discloses a preparation method for a double-faced power generation metal wrap through (MWT) solar cell. The method comprises the following steps of: forming a positive-negative (PN) junction on the upper surface of a silicon wafer, and forming a back field on the lower surface of the silicon wafer; drilling a hole at the preset position of the silicon wafer by adopting lasers; printing a corrosive material within a preset range around the hole drilled by the lasers by adopting a screen printing process; drying the corrosive material; and cleaning the silicon wafer. When the double-faced power generation solar cell is prepared by adopting the method provided by the invention, an affected layer caused by laser hole drilling is also removed while the back field is removed, and moreover, the process flow is simplified, and the cost is favorably controlled.

The invention discloses an active solar heat-gathering and energy-storage system and a method thereof. The invention discloses a new active heat-gathering and energy-storage system and method on the basis of organic combination for a photovoltaic power generation technology and a heat pump cycle technology. The new active heat-gathering and energy-storage system and method aim at effectively transmitting and storing the heat energy formed by absorbing solar energy, so that the absorption and conversion efficiency for the solar energy is increased as a whole, and the energy efficiency ratio andthe market value of a photovoltaic product are further increased. The system mainly comprises the following devices which are mutually connected in sequence: a photovoltaic power generation device, aheat pump device and an energy accumulation device, wherein the photovoltaic power generation device absorbs visible light through a photovoltaic panel and convers the visible light to light electricity; the heat pump device is used for transferring the heat energy generated by the photovoltaic panel to the energy accumulation device through a refrigerant cycle pipeline; an evaporator assembly ofthe heat pump device is connected with the photovoltaic panel to form a heat-gathering device; and the energy accumulation device is used for absorbing and storing the heat unidirectionally conveyedfrom the heat pump device.

The invention provides a solar cell and a producing method thereof, a photoelectric photo-thermal vacuum tube and a receiver thereof. The producing method of the solar cell includes depositing a back electrode conductive film layer on a columnar substrate and etching a spiral chute; depositing a solar cell film layer on the spiral chute and a back electrode spiral band and etching the spiral chute; depositing a top electrode conductive film layer on a solar cell film spiral band and the spiral chute, and etching the spiral chute; etching a longitudinal dividing chute along the axial direction of the spiral chute, wherein each independent and corresponding back electrode, solar cell film and top electrode form a single solar cell, and top electrodes and back electrodes of adjacent solar cells are connected through top electrode conductive films in the spiral chute to form the solar cell composed of a plurality of single solar cells connected in series. According to the solar cell and the producing method thereof, the processing efficiency can be effectively improved, and the producing cost can be reduced.

The invention provides a heat pump system and a control method thereof. The heat pump system comprises a compressor, a first throttling device, a first evaporator, a second throttling device, a detection device, a first control device and a photovoltaic power generation device. The photovoltaic power generation device comprises a second evaporator and a solar cell panel. The first end of the second evaporator is connected with the second throttling device. The second end of the second evaporator is connected with an air return port of the compressor. The solar cell panel is connected with the second evaporator. The second evaporator is used for cooling the solar cell panel. According to the heat pump system, electric quantity generated by the solar cell panel can be directly provided for the heat pump system, energy conservation and environment protection are achieved, the solar cell panel is cooled through a lower-temperature refrigerant, and air return temperature and pressure of the refrigerant are detected through the detection device, and the first control device controls the first throttling device and the second throttling device to be opened or closed according to the air return pressure and temperature.

The invention discloses a back electrode structure. The back electrode structure includes at least one back silver main grid and a plurality of aluminum grid lines parallel to each other. The aluminum grid lines are connected with the back silver main grid perpendicularly. An area in overlapped connection is formed between the aluminum grid lines and the back silver main grid and surrounds the periphery of the back silver main grid. In the area in overlapped connection, the aluminum grid lines cover the back silver main grid. Correspondingly, the invention also discloses a P-type PERC double-face solar battery employing the above back electrode structure. By adopting the structure and the battery provided by the invention, simple structure, low cost and high conductivity are achieved and the photoelectric conversion efficiency of the battery is realized.

The invention discloses a solar energy collecting device with a cell panel protection mechanism, which comprises an accommodating box, wherein the accommodating box is internally provided with a processing cavity with an upward opening, the processing cavity is internally provided with a turnover device, the turnover device can pass through hydraulic rods which are arranged on the inner wall of the bottom end of the processing cavity and are symmetrical left and right. The solar energy collecting device utilizes the mode of controlling a power source by a program language to automatically change the working mode of the solar energy equipment, enables a shaft to synchronously rotate only in the upward moving process through a one-way coupling structure to turn over and change the upper andlower positions of the solar panel in the upward and downward moving process so as to protect the cell panel, and periodically carries out sweeping type cleaning on the cell panel in left-right back-and-forth movement and forward-and-backward movement, thereby removing dust and garbage adhered to the solar cell panel, and ensuring the photoelectric conversion efficiency.

The invention discloses a monitoring system mounting device with short time consumption and a mounting method. The monitoring system mounting device comprises a photovoltaic cell box, a connecting rod, a telescopic rod and an embedding positioning plate, a disc is fixed to the top of a mounting cover, a splitting rod is mounted in the disc in a penetrating mode, a hole groove is formed in the splitting rod, a solid connecting rod is installed in the photovoltaic cell box in a penetrating mode through a first threaded hole, a top plate is fixed to the inner wall of the mounting cover, an embedded positioning plate is welded to the bottom of the top plate, a protection cover is slidably installed in the embedded positioning plate, two sets of electric sliding rods and long rods are installed at the bottom of the photovoltaic cell box, and the bottoms of the electric sliding rods are slidably connected with the telescopic rod. By arranging the connecting rod, the connecting rod penetrates through the interior of the photovoltaic cell box and is in threaded connection with the splitting rod penetrating and extending to the upper part of the disc, so that the device is assisted to realize flexible disassembly and assembly of the photovoltaic cell box and the telescopic rod, and the combined installation time of the device is shortened.

The invention discloses an inorganic perovskite solar cell and a preparation method thereof. Compared with a traditional perovskite solar cell, the traditional precursor solution components are changed, formate ions and hydrogen ions in the optimized components can spontaneously form acting force in the preparation process, so that the components are prevented from forming a perovskite phase alongwith volatilization of a solvent, the crystallization speed is reduced, and the influence of moisture on the light absorption layer thin film before annealing is greatly reduced. The perovskite thinfilm prepared by the method ensures the photoelectric conversion efficiency of an assembled device, and solves the problem of poor stability of a light absorption layer thin film in a high-humidity environment.

A system for remove dust from photovoltaic panel belonging to the field of solar photovoltaic technology, A technical scheme comprise a plurality of groups of photovoltaic panel and photovoltaic scaffolds, the photovoltaic panel includes a frame, a glass cover plate and a heat absorbing plate, wherein the glass cover plate is located on an upper end surface of the frame, the heat absorbing plate is arranged in the frame, a brush bar for cleaning dust on the surface of the glass cover plate and a driving assembly for driving the brush bar to move are arranged on the photovoltaic support, and the opening and closing of the driving assembly is controlled by a control system; A light-sensitive response module is arrange in that frame for detecting whet dust blocks the surface of the glass cover plate and outputting an induction signal, The photosensitive response module is electrically connected with the control system. When the photosensitive response module senses that dust is blocked, the control system outputs a control signal for starting the driving component. The invention can automatically remove the dust on the surface of the photovoltaic panel and maintain the power generation efficiency of the photovoltaic panel.

The invention discloses a frame profile of a solar photovoltaic module. The frame profile comprises an upper frame body and a lower frame body, wherein the upper frame body and the lower frame body are fixedly connected by a welding process, the upper part of the upper frame body is of a clamping groove structure, the lower part of the upper frame body is of a support plate structure, the lower frame body is made of an L-shaped plate material, a hollow cavity is formed by the support plate structure of the upper frame body and the lower frame body, and a through hole structure is formed in an upper panel of the clamping groove structure in the length direction. The frame profile of the solar photovoltaic module, disclosed by the invention, has the advantages that the frame profile is reasonable in structural design, the mounting and use properties are stable, and the through hole structure in the surface of the clamping groove of the upper frame body can effectively increase the light intercepting area of the solar cell module and ensure the photoelectric conversion efficiency; meanwhile, through the clamping groove structure, the mass and the using amount of the frame profile are effectively reduced, and the purpose of controlling the cost is achieved.

The invention discloses a reel-to-reel manufacturing method for a cadmium sulfide buffering layer in a flexible CIGS thin film solar cell. A chemical bath deposition (CBD) is adopted to manufacture buffering layer cadmium sulfide thin films, the flexible CIGS thin film solar cell can obtain high photoelectric conversion efficiency through the CBD, and the reel-to-reel manufacturing method for the cadmium sulfide buffering layer is particularly suitable for continual reel-to-reel technological production on a large scale.

The invention discloses a road and bridge project side-hanging power generation system. The system comprises a bridge. Two sides of the bridge are respectively provided with a photovoltaic power generation device. The photovoltaic power generation device is arranged on the side surface of the bridge. A travelling track is arranged on the upper part of the photovoltaic power generation device and is along a length direction of the bridge. The travelling track is provided with a travelling dolly. A photovoltaic electric plate cleaning plate is hoisted on the travelling dolly. The photovoltaic electric plate cleaning plate falls on the photovoltaic power generation device. The system can efficiently perform photoelectric conversion, and is characterized by high electric energy storage capacity, and the system has a self-cleaning function and ensures photoelectric conversion efficiency.

A photovoltaic system with glass fibers comprises a solar photovoltaic module frame and a junction box for a photovoltaic panel. A bayonet for mounting a solar cell module is arranged on the inner side of the frame, a night side of the frame is a mounting surface, a mounting cavity is arranged between the mounting surface and the bayonet, at least one vent hole is arranged on a sunward side of the frame and communicated with the mounting cavity, the solar photovoltaic module frame is made of glass fiber materials, the junction box for the photovoltaic panel comprises a junction box body and a box cover, four clamp grooves are arranged on one side of the junction box body, fixture blocks are arranged on the other side of the junction box body, clamp hooks corresponding to the clamp grooves are arranged on the box cover, elastic clamp hooks corresponding to the fixture blocks are arranged on the box cover, and the junction box is made of glass fiber materials.

The invention discloses an optical coupling method of a photoelectric detector. According to the method, coupling agents of NaI crystals and photomultipliers are screened through a large number of experiments, then a method for coupling the NaI crystals and the photomultipliers is obtained through a large number of experiments in a screening mode, and the coupled NaI crystals and the photomultipliers are assembled to form the photoelectric detector in the optimized technological method. By means of the method, the volatilization and diffusion problem of optical coupling materials in a low-pressure environment in the prior art can be solved, light rays are prevented from being reflected and affecting the photoelectric conversion efficiency, flexibility of detecting the flight height of an air vehicle is guaranteed, and reliability of safe landing is guaranteed. The obtained photoelectric detector is high in quality, superior in performance, good in stability, strong in practicability, and capable of being widely applied to Chinese space crafts and moon landing detectors.

The invention belongs to the technical field of electric safety equipment, and particularly relates to an electric wearable smart helmet. The helmet comprises a helmet body and an energy storage assembly. The front of the helmet body is provided with a mounting seat, and the energy storage assembly is telescopic and contained in the mounting seat when contracted. The energy storage assembly includes two or more curved plates movably sleeved to each other in the lateral direction of the mounting seat, and the tops of the curved plates are provided with a thin film solar panel. The thin film solar panel can be prevented from being scraped, the photoelectric conversion efficiency of the thin film solar panel is improved, the thin film solar panel is in the stable dry storage environment, andthe service life is prolonged.

The invention discloses a colored photovoltaic module and a preparation method thereof. The colored photovoltaic module comprises a front plate glass layer, a power generation glass layer and a back plate glass layer, wherein the two faces of power generation glass of the power generation glass layer are coated with adhesive, a pattern is arranged on front plate glass of the front plate glass layer, the pattern is composed of a plurality of colored glaze color points, the diameter of the colored glaze color points is 10-100 [mu] m, a gap between the adjacent colored glaze color points is 50-200 [mu] m, and the thickness of the front plate glass ranges from 5 mm to 6 mm. The problems that an existing double-glass photovoltaic module is single in color, poor in attractiveness, poor in impact resistance and high in fragment rate are solved.

The invention discloses a solar photovoltaic and photo-thermal integrated system for recycling waste heat by utilizing a capillary tube, and relates to a solar photovoltaic and photo-thermal integrated system. The aims of the invention is to solve the technical problems that the temperature of an existing solar photovoltaic panel seriously restricts the photoelectric conversion efficiency of the solar photovoltaic panel and the heat generated by the solar photovoltaic panel is wasted. The solar photovoltaic panel cooling system utilizes a capillary network as a heat exchanger to cool the solarphotovoltaic panel, in addition, the specific heat of water is large, so that compared with air, the water is used as a cooling medium, and the heat transfer efficiency is greatly improved. In the process of utilizing heat, the solar photovoltaic and photo-thermal integrated system exchanges heat with the urban water supply system to prepare domestic hot water, thereby reducing the energy consumption of buildings; and moreover, the roots of the plants are heated to promote the growth and development of the plants, and the method is applied to city beautification. The system has excellent performance, and after the photovoltaic panel in unit area is cooled, the power generation efficiency of the photovoltaic panel is improved by more than 10%.

The invention discloses a solar battery assembly and a preparation method thereof, and a solar battery unit. The solar battery assembly comprises an upper cover plate, a front-surface adhesive film layer, a battery sheet array, a back-surface adhesive film layer and a backboard which are successively superposed, wherein the battery sheet array comprises multiple battery sheets, adjacent battery sheets are connected through multiple conductive wires, the conductive wires are formed by metal wires extending between the surfaces of adjacent battery sheets in a reciprocating mode, the metal wires comprise metal wire bodies and conductive adhesives wrapping the outer layer of the metal wire bodies, the conductive wires are in contact with the battery sheets, and the front-surface adhesive film layer is in direct contact with the metal wires and fills the portion between adjacent conductive wires. According to the solar battery assembly provided by the embodiments of the invention, the front-surface adhesive film layer is in direct contact with the metal wires and fills the portion between adjacent conductive wires, such that the conductive wires can be effectively insulated from external air, steam and the like, the conductive wires are prevented from oxidation, and the photoelectric conversion efficiency can be effectively guaranteed.