610results about How to "Improve conversion efficiency" patented technology

Embodiments described herein provide optical systems that can mix colors to produce illumination patterns having a large area with uniform color. One embodiment of an optical system can include a set of optical units that each produces an illumination pattern with uniform color and intensity. The optical units are spaced so that the individual illumination patterns overlap to create an overall illumination pattern with an overlap area. In the overlap area, the colors emitted by the individual optical units mix to create a desired color. Embodiments of optical systems can provide beam control so that the optical units emit a high percentage of light in beam.

According to one embodiment, a biofuel processing system includes a biomass conversion system, a gasification reactor and/or a pyrolysis reactor, and a synthetic fuel creation system. The biomass conversion system uses a biological process to create a low-molecular-weight hydrocarbon stream from a biomass. The reactor generates heat and hydrogen using fresh biomass or undigested biomass from the biomass conversion system in which a portion of the heat is used by the biomass conversion system. The synthetic fuel creation system converts the low-molecular-weight hydrocarbon stream from the biomass conversion system and/or the reactor to liquefied fuel using another portion of heat from the reactor.

A surface of a multicrystalline silicon substrate is etched with an alkaline aqueous solution in a condition so that a surface area-to-planar surface area ratio R is smaller than 1.1. A multiplicity of fine textures are formed over the irregularities by dry etching. This allows fine textures to be formed uniformly, and a solar cell with high efficiency can thus be produced.

A light scattering film having the structure which guides electrical signal to a desired position and scatters incident light and the surface of which is substantially flat, and a photoelectric device using the same. The light scattering film includes a medium made of transparent conductive material and a light scatterer embedded in the medium. The light scattering film realizes conductivity and the light-scattering characteristic by single component. It is not necessary to make the texture of a surface with concavity and convexity deliberately to achieve the light-scattering characteristic. Desirably, the surface is substantially flat. When a semiconductor layer is formed on the surface, the defects are suppressed because of the flatness of the surface. The photoelectric device having the light scattering film and the semiconductor device on the surface of the film can achieve high photoelectric conversion efficiency.

The invention discloses a system and a method for controlling an online type photovoltaic power generation microgrid without a storage device. The system comprises a photovoltaic component, a power controller, a grid-connected inverter system, a current detection device and a reverse-power protector, the photovoltaic component is connected with the grid-connected inverter system through the power controller, output of the grid-connected inverter system and grid current are connected to simultaneously supply power to load, the power controller enables a photovoltaic power generation system to be in a variable power output state and dynamically adjusts output power of the photovoltaic power generation system according to changes of the load, the current detection device detects magnitude and phase position of the grid current as current feedback control signals of the grid-connected inverter system, and the reverse-power protector is positioned between the microgrid and an outer grid to stop the microgrid from transmitting current to the outer grid. The system is free of a storage battery energy storage system, the outer grid is only a supplement when the microgrid is in power shortage, and power transmission to the outer grid is effectively avoided, so that effects of electricity saving can be realized without upgrading power transmission networks and power distribution networks, and popularization is facilitated.

The invention discloses a display panel and a display apparatus. The display panel comprises data lines, scan lines and an induction antenna, the data lines and the scan lines are arranged in an intersected manner and positioned in a display area of the display panel and define multiple sub-pixels, the induction antenna comprises multiple induction coils, and at least part of the induction antenna is positioned in the display area of the display panel. The occupation area of the induction antenna is increased, the amount of the induction coils that can be accommodated in the display panel is increased, and the conversion efficiency of the induction antenna is improved. According to the display panel provided by the invention, projection of the data lines and/or the scan lines covers projection of the induction coil in the direction vertical to the surface of the display panel, and the induction coils are prevented from influencing the aperture ratio of the display panel because of being positioned in the display area.

The invention discloses a control circuit of a cascade buck-boost converter and a control method thereof, which belong to the technical field of power electronic converter control. The structure of the control circuit comprises an output voltage sampling circuit, two error amplifiers, a triangle wave generating circuit, a comparator circuit, a drive circuit and a voltage setting circuit; the controlled buck-boost convertor is formed by the cascade of a booster converter and a buck converter; a first control signal and a second control signal which are generated by comparing the control voltage output by the first error amplifier with triangle wave voltage control the switch tube of the booster converter through the drive circuit; the first control signal sets the control voltage output by the second error amplifier through the setting circuit; and a third control signal and a fourth control signal which are generated by comparing the control voltage output by the second error amplifier with the triangle wave voltage control the switch tube of the buck converter through the drive circuit. The invention has the advantages that the circuits are simple, only one triangle wave generating circuit is required to control two circuits, and the conversion efficiency is high.

The invention discloses a flexible thin film solar cell and a manufacturing method thereof, wherein the manufacturing method comprises the following steps: providing a hard support plate; forming a stripping layer on the surface of the hard support plate; forming a thin film solar cell layer series on the surface of the stripping layer; forming a flexible support layer on the surface of the thin film solar cell layer series; and separating the flexible support layer and the whole thin film solar cell layer series from the hard support plate. In the invention, the flexible thin film solar cell can be manufactured directly on the surface of the hard support plate such as glass without depending on traditional flexible substrates which are high in requirements for physical and chemical characteristics and high in expense and without the complicated flexible thin film solar cell manufacturing process of firstly adhering the flexible substrate on the surface of the hard support plate and then carrying out thin film deposition, therefore, the method of the invention is a revolutionary method for directly manufacturing a large-area and internal cascade flexible thin film solar cell on the hard support plate.

A color conversion film is disclosed that absorbs light from an organic electroluminescent part emitting blue-green light and converts the light to visible light at a longer wavelength. The color conversion film includes two different dyes. A first dye is a polymer dye with an average molecular weight of 1000 to 1,000,000 that absorbs light incident on the color conversion film and transfers the energy of the light to a second dye. The second dye is a dye that receives the energy from the first dye and emits light. With a multicolor-emitting, organic electroluminescent device including the color conversion film, it is possible to achieve excellent conversion efficiency without increasing the thickness of the color conversion film as in a conventional device using a binder resin.

The invention provides a maximum power tracking control method, relating to the technical field of solar energy power generating. The method comprises the following steps: a solar tracking system sends out corresponding control signals according to the detecting results of an optical tracking detector, controls running of the mechanical part of a tracking and positioning system of biaxial machinery so that sunlight always vertically irradiates a solar panel; meanwhile, the detecting results of the optical tracking detector are fed back to a maximum power point tracking controller and the maximum power point is tracked by combining the characteristics of the solar panel. By the method, conversion efficiency of the system is improved on the basis of improving the utilization factor of solar radiation energy and cost of the system can be indirectly lowered; closed-loop control of the grid-connected current can be realized so that the output current of inverters is synchronous with the line voltage (the power factor is 1), thereby avoiding the impact of the grid-connected current on power networks; system dynamics has the obvious characteristics of fast response speed, safe and reliable running, no pollution to the line voltage and low harmonic distortion of the grid-connected current, etc.

The invention discloses a method for making solar batteries by adopting an ion injection method. The impurity doping on a silicon chip can be realized by adopting the ion injection method. Compared with a thermal diffusion doping process, the process of the invention has the advantages that the control is precise, the impurity doping can be repeated, the processing process is a low-temperature process, crystalline silicon solar batteries can achieve higher conversion efficiency, and the maximization of power output can be realized.

The invention discloses a non-isolated direct-current converter type differential three-level inverter. The circuit structure of the inverter consists of a power supply, an input filter, two bidirectional three-level direct-current converters, an output filter and an alternating current load, wherein the bidirectional three-level direct-current converters are connected in a differential way, i.e. input ends are connected in parallel and output ends are connected in series. By the inverter, the function of converting unstable and low-quality direct-current voltage into stable and high-quality sine alternating-current voltage as required can be realized. A circuit topology family of non-isolated direct-current converter type differential three-level inverters, including Boost type, Buck type, Buck-Boost type, Cuk type, Sepic type and Zeta type, is obtained by changing the type of the bidirectional three-level direct-current converters. The inverter has the characteristics of simple circuit topology, capability of adapting to wider voltage input range, bidirectional power current, single-stage conversion, small volume, light weight, low cost, simple control, high conversion rate, high load adaptability, high dynamic performance and the like, and is applied to a high-voltage input occasion.

The invention relates to novel lead-free sliver slurry for a high-efficiency crystalline silicon solar battery as well as preparation and application thereof. The novel lead-free sliver slurry for the high-efficiency crystalline silicon solar battery comprises 0.5-5wt% of lead-free glass powder with the chemical composition of aTeO2-b(Bi2O3, Sb2O3)-cMO, 60-90wt% of conductive silver powder, and 9.5-35wt% of organic carrier phase. The invention further provides the preparation process and the application of the novel lead-free sliver slurry for the high-efficiency crystalline silicon solar battery. The lead-free sliver slurry disclosed by the invention is cofired according to a one-step method silk-screen printing process to be prepared into an electrode with a low contact resistance. A process of slightly doping the crystalline silicon solar battery is simplified, the conversion efficiency of the battery is improved and the manufacturing cost of the battery is reduced.

The invention provides a green method for recycling lithium in cathode materials, and the method comprises the following steps of 1, using cathode materials containing lithium and mixture of weak base and water as the reaction raw materials, carrying out reaction at the temperature of 5 DEG C-90 DEG C and at the pressure of 0.2 MPa-1.0 MPa, proceeding liquid-solid separation on the materials remaining after the reaction and then obtaining lithium and residue; 2, carrying out postprocessing on the extraction solution of lithium to obtain lithium carbonate. The green method for recycling lithium in cathode materials has simple procedures and green reaction process, during which, the leaching efficiency of lithium is larger than 95 WT%, the purity of lithium carbonate is larger than 98.5 WT%, and the impurity content satisfies national standard GB/T11075 2013.

The invention discloses a floating type multi-floater wave power generation device which comprises a floating type structure, a mooring system, a hydraulic transmission system and a power generation system. The floating type structure floats on the sea surface and is moored through the mooring system. Multiple floaters of the floating type structure are connected with a main floating body through swing arms respectively. The floaters move along with waves and resonate together with waves, the floaters which do the floating and sinking movement after being excited by waves drive the swing arms to swing around a fixed fulcrum, a piston rod of a hydraulic cylinder is driven to reciprocate, an oily medium in the hydraulic cylinder is pushed to enter a hydraulic system to form a circuit and to enter a hydraulic motor, the hydraulic motor rotates to drive an electric generator to generate electricity, and then power generation is achieved through wave energy. According to the floating type multi-floater wave power generation device, the multiple floaters which move up and down along with waves absorb sea wave energy, stability of the main floating body of the device in waves is improved through a damping type base plate and the mooring system which adopts the three-point horizontal mooring method, and the floating type multi-floater wave power generation device has the advantages of being high in conversion efficiency, stability and reliability.

The invention provides an inner rotor direct-driving type structure of a suspension type single-rail train. The structure comprises a framework of a bogie, wherein the framework of the bogie comprises a side frame, cross beams and a framework center platform; an air spring and a sleeper beam are arranged on the framework center platform; transverse pull rods are arranged on the front side and the back side of the sleeper beam; the sleeper beam is press-fitted on the air spring; a suspension device is a four-connecting-rod mechanism; a pair of traveling wheels is transversely arranged on each of outer sides of the side frame; guiding wheels are arranged at two ends of the side frame; and an inner rotor type permanent-magnet motor for providing rotating power for the traveling wheels is arranged between each pair of the transverse traveling wheels. According to the structure, the inner rotor type direct-driving motors are used as driving devices of the bogie, so that the energy conversion efficiency is greatly improved; and meanwhile, the size and the heating value of the motors are reduced, the structure of the bogie is simplified, the reliability of the bogie is improved, the maintenance cost is reduced, and noise caused by the bogie during running is reduced.

The invention discloses a technique for preparing oligosaccharide and Chitosan oligosaccharide. The technique takes the Chitosan oligosaccharide with the deacetylation degree between 70 and 95 percent as a raw material; and the oligosaccharide and the Chitosan oligosaccharide are prepared through the steps of dissolution, quick viscosity reduction of a non-specific enzyme, hydrolysis of chitoanase, adjustment of the pH of digest to between 5.5 and 7.5, filtration, film-method refining, spray drying and so on. The technique has the advantages of the enzyme preparation technique, and simultaneously has the characteristics of high degradation efficiency and transformation efficiency and low cost.

The invention relates to an all-fiber mode converter and a light system. The all-fiber mode converter comprises a mode coupling fiber portion and a fiber portion of a mode peeler which are connected, a light system structure of the all-fiber mode converter comprises an input fiber, a first mode field adapter, an all-fiber mode converter, a second mode field adapter and an output fiber which are sequentially welded to realize mode conversion, a first spreading mode is transmitted from the input fiber through the first mode field adapter to the all-fiber mode converter at the lowest loss rate, and only a second spreading mode exists after the all-fiber mode converter, and the second spreading mode is transmitted through the second mode field adapter to the output fiber at the lowest loss rate for output. The all-fiber mode converter is for fiber mode conversion and further has advantages of easy realization, high conversion efficiency and small conversion noise.

A GaN-based white-light LED comprises a substrate, a buffer layer, an n-GaN layer, a blue-light multiple quantum well layer, a p-GaN layer, a transparent conducting layer, an upper electrode array, a lower electrode and a perovskite layer. The buffer layer is made on the substrate, the n-GaN layer is made on the buffer layer, and a table top is formed on one side on the n-GaN layer; the blue-light multiple quantum well layer is made on the other side of the table top of the n-GaN layer, the p-GaN layer is made on the blue-light multiple quantum well layer, the transparent conducting layer is made on the p-GaN layer, the upper electrode array is made on the transparent conducting layer, and the lower electrode is made on the table top of the n-GaN layer; the perovskite layer is made on the transparent conducting layer and located in gaps of the electrode array. According to the GaN-based white-light LED, a mature GaN-based LED technology is combined with a novel perovskite materials, and the white-light LED which is low in cost and efficient is made out.

The invention discloses a coupling inductor applicable to a multi-phase interleaved parallel converter. A structure of the coupling conductor is mainly formed by combining backcoupling transformers consisting of two phases of windings and an energy storage inductor; for an n-phase interleaved parallel converter, the quantity of the backcoupling transformers is n-1 or n or n(n-1)/2, and the connection relation of the backcoupling transformers is a central type or a head-tail closure type or a two-two combination type respectively; and the energy storage inductor is serially connected with at least one phase of the winding in the backcoupling transformers, the winding quantity of the energy storage inductor is between 1 and n, and various phases of the windings of the energy storage inductor are independent from each other or are subjected to forward coupling. The coupling inductor ensures that an energy storage function and a filtering function are borne by the energy storage inductor and the backcoupling transformers respectively by splitting the energy storage function and the filtering function, can effectively avoid the intrinsic contradiction between the energy storage function and the filtering function in a multi-magnetic circuit magnetic core, further reduce the loss and volume of magnetic components, improve the power density, the conversion efficiency and the output dynamic performance of the converter, and is suitable for the multi-phase interleaved parallel converters.

The invention provides a neutron detector and a neutron detection method. The neutron detector comprises a drift electrode for providing a drift electric field, a boron-coated gas electron multiplier structure for performing conversion on incident neutrons, a gas electron multiplier structure for performing gas amplification on primary electrons generated after neutron conversion, and a read-out electrode for reading the amplified electronic signals out. The drift electrode, the boron-coated gas electron multiplier structure, the gas electron multiplier structure and the read-out electrode are arranged in parallel and arranged in order. The boron-coated gas electron multiplier structure is formed by at least one cascaded first gas electron multiplier film, and at least one side of the first gas electron multiplier film is coated with a boron layer. The neutron detector of the invention can be used to greatly improve the neutron detection efficiency, has advantages of high counting rate and good time resolution, and can be used to realize time resolution of higher order, and at the same time, the neutron detector has advantages of a gas detector and has advantages of good gamma inhibiting ability, low cost and large-area fabrication.

The invention discloses functionalized graphene-based solar back aluminum slurry and a preparation method thereof. The solar back aluminum slurry is prepared from the following raw materials in percentage by weight: 65-73 percent of aluminum powder, 1-3 percent of glass powder, functionalized graphene dispersion liquid containing 0.12-0.15 percent of functionalized pure graphene, 20-30 percent of organic carrier, 3-5 percent of auxiliary agent and the balance of diluent, wherein oxidized graphene is modified by using a coupling agent; the modified oxidized graphene is obtained through reaction of the coupling agent and the oxidized graphene and then is reduced to obtain the functionalized graphene; the functionalized graphene is dispersed into terpineol and butyl carbitol with a mass ratio of 5.5-6.5:1 after being subjected to ultrasonic treatment to form the functionalized graphene dispersion liquid. The preparation method comprises the steps of mixing, grinding and vacuum deformation of the raw materials. The solar back aluminum slurry has the advantages of high printing rate and good adhesion, conductivity, bending resistance and weathering resistance.

A push-pull-type electrostatic-type ultrasonic transducer includes a first electrode having through holes, a second electrode having through holes each of which is paired with the corresponding through hole of the first electrode, and an oscillation film sandwiched between a pair of the first and second electrodes and having a conductive layer to which direct current bias voltage is applied. When a wavelength obtained from a resonance frequency at a mechanical oscillation resonance point of the oscillation film is λ, a thickness t of the respective fixed electrodes is (λ/4)·n or substantially (λ/4)·n (where λ: wavelength of ultrasonic wave, n: positive odd number). AC signals as modulation waves produced by modulating carrier waves in an ultrasonic frequency band by signal waves in an audio frequency band are applied between a pair of the electrodes.

The invention relates to a method for manufacturing a solar battery with a selective emitter, and in particular relates to a method for manufacturing a solar battery with a selective emitter through carrying out light doping on the positions below a positive electrode grid line and the vicinity of the positive electrode grid line as well as heavy doping on the positions between electrodes. When the electrodes are printed, high-concentration phosphorus slurry is doped in electrode slurry, and the combination of diffusion, rapid diffusion and regular diffusion is carried out in a phosphorus oxychloride atmosphere after the high-concentration phosphorus slurry is subjected to electrode grid linear silk-screen printing. The conversion efficiency of a crystal silicon solar battery is improved due to the improvement of a selective emitter technology for open-circuit voltage, short-circuit current and filling factors; the internal resistance of the battery is reduced, the inner losses and the heating are decreased in the process of power generation, and the service life of a battery plate is prolonged at a certain extent; the reverse current is reduced; the performances at a low light level are good; and the light quantum response of the battery is improved due to the low diffusion density, the battery consistency is good, and the technology is stable.

The invention discloses a DOC oxidation catalyst for diesel engine exhaust gas discharging. The DOC oxidation catalyst comprises aluminum oxide or silicon modified aluminum oxide with a large specific surface area, cerium zirconium oxide or ceric oxide with a large specific surface area, a sulfur poisoning resistance material and a material with an adsorption effect on HC. The invention further discloses a preparation method of the DOC oxidation catalyst for diesel engine exhaust gas discharging. The preparation method comprises the following steps: 1, preparing slurry; 2, adding a noble metal solution; 3, coating a carrier; 4, drying and calcining the carrier. According to the preparation method provided by the invention, the adsorption performance of the catalyst for HC at low temperature is improved, and the conversion efficiency of HC at low temperature is improved; the catalyst is high in sulfur poisoning resistance and excellent in high-temperature aging resistance, and can effectively reduce the discharging volume of CO and HC.

The invention discloses a lactobacillus acidophilus and application thereof. The lactobacillus acidophilus is lactobacillus acidophilus and is collected in the China General Microbiology Center of Committee for Culture Collection of Microorganisms on 11th March, 2011; and the registered number of the lactobacillus acidophilus in the collection center is CGMCC No.4649. The lactobacillus acidophilus and a lactobacillus acidophilus preparation disclosed by the invention are mainly used as additives of animal fodder and can also be used for adjusting the microecological balance in animal intestines so that the product has a function of enhancing the specific immunity function to prevent and treat diseases and is also capable of providing trophic factors, accelerating digestion and absorption of nutrients, accelerating the animal growth and increasing the fodder conversion rate. Meanwhile, by screening the formulation, the cost of the preparation disclosed by the invention is low and the quality of the product is stable.

The invention discloses a DMOS and manufacturing method of an integrated starting tube, a sampling tube and a resistor. The DMOS comprises a sharing substrate and an epitaxial layer, wherein the epitaxial layer is arranged at an upper side of the substrate, a main MOS tube, the sampling tube and the starting tube are integrally arranged on the epitaxial layer, the main MOS tube, the sampling tubeand a Drain end of the sampling tube are connected, the main MOS tube is connected with a Gate end of the sampling tube, a Gate and a source of the starting end are independent to each other, and theGate end is simultaneously connected to the Drain end by a resistor. By the DMOS, the starting loss and the current sampling loss in the circuit can be reduced, the standby power consumption is reduced, the energy conversion efficiency is improved, meanwhile, the process of integrating the starting tube, the sampling tube and the resistor is compatible with a conventional DMOS process, and the cost can be reduced.

The invention discloses a preparation method of a solar cell. The method comprises the following steps of: S1. forming a P+ type doped layer on the back of a wafer of a P type substrate by ion implantation; S2. forming an N type doped layer on the surface of the wafer of the P type substrate; S3. forming N+ heavily doped regions in the N type doped layer; S4. forming a coating on the surface of the wafer of the P type substrate, wherein the coating comprises a passivation layer and an anti-reflection film; S5. manufacturing surface electrodes and back electrodes on the surface and back of the wafer of the P type substrate, wherein the surface electrodes are manufactured in the regions corresponding to the N+ heavily doped regions on the N type doped layer; and S6. sintering the wafer of the P type substrate at a temperature of 700-1100 DEG C to combine the metallic elements in the surface and back electrodes with the wafer in a eutectic manner. The invention also discloses a solar cell. The solar cell and the preparation method have the following effect: the photoelectric conversion efficiency of the solar cell is improved due to the back surface field effect and the structure of a selective emitter.

The invention discloses a charging device which comprises an AC-AC (Alternative Current-Alternative Current) conversion module, a resonance capacitor, a transformer, a rectification module and a sampling control module, wherein the AC-AC conversion module comprises a first switch tube, a second switch tube, a first driving unit and a second driving unit; the first switch tube is connected with the first driving unit; the second switch tube is connected with the second driving unit; primary coils of the resonance capacitor and the transformer are connected in parallel; the rectification module is connected with the transformer; the sampling control module is connected with two ends of the resonance capacitor, the rectification module, the first driving unit and the second driving unit respectively; and the sampling control module is used for generating control signals according to sampled voltage signals at two ends of the resonance capacitor and direct-current voltage signals output from the rectification module so as to control the first switch tube and the second switch tube. By virtue of the charging device, the structure and the procedure of a conversion circuit are simplified, and the electric energy transmission efficiency is improved.

The invention discloses a silicon quantum dot solar energy cell based on a heterojunction structure and a preparation method thereof. The solar energy cell comprises a silver aluminium composite back electrode, a P-type monocrystalline silicon substrate, a silicon nitride thin layer, an N-type amorphous silicon layer, a transparent conductive film and a silver electrode from the bottom up. The silicon nitride thin layer contains silicon quantum dots with a diameter of 1-6 nm. The transparent conductive film is an Al-doped ZnO transparent conductive film with a thickness of 200-300 nm. The P-type monocrystalline silicon substrate for texturing is provided with the silicon nitride layer containing the silicon quantum dots, deposited with the N-type amorphous silicon layer, then deposited with the Al-doped ZnO transparent conductive film, finally both sides of the above resultant are added with the silver electrode and an Al-back surface field respectively. The cell has the advantages ofsimple structure, wide spectrum response range, high open-circuit voltage and large photoproduction current, and a preparation step of the cell is compatible with a present technique. The invention provides a good solution method for increasing present silicon-based solar energy cell conversion efficiency.