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

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 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 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 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 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 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.

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%.