555 results about "Cell fabrication" patented technology

Photovoltaic materials and methods of photovoltaic cell fabrication provide a photovoltaic cell in the form of a fiber. These fibers may be formed into a flexible fabric or textile.

Photovoltaic materials and methods of photovoltaic cell fabrication provide a photovoltaic cell in the form of a fiber. These fibers may be formed into a flexible fabric or textile.

The invention discloses a novel detection method for self-discharge characteristics of lithium iron phosphate system power lithium ion batteries. The method comprises the following steps: step 1, charging and discharging batteries, and adjusting SOC (System On Chip) states of the batteries to be 20-40%; step 2, standing for a certain period of time at normal temperature, and measuring open-circuit voltage (OCV)1 of the batteries; step 3, performing high-temperature aging on the batteries; step 4, standing for a certain period of time at normal temperature, and then detecting OCV2 of the batteries; step 5, calculating a voltage drop deltaU of the batteries, wherein deltaU is equal to OCV1-OCV2; and step 6, calculating an average value and standard deviations of the voltage drops of the same group of batteries, determining a self-discharge detection standard of the batteries, and screening. The method for detecting the self-discharge characteristics of the batteries by virtue of voltage differences of the batteries disclosed by the invention can be used for well shielding interference of factors such as equipment, operations and environment temperature existing in a manufacturing process of the batteries in the self-discharge data acquisition accuracy of the batteries, so that the self-discharge characteristic data distortion of a single battery can be avoided, the matching reliability of the batteries can be effectively improved, and the cycle life of a battery pack can be prolonged.

The invention relates to the field of fabrication of a solar cell, in particular to a surface passivation and anti-reflection technology of crystalline silicon cell for improving photoelectric conversion efficiency. Aiming at the existing cell technology process flow, nanometer lamination of a material such as SiO2, Al2O3 and SiNx and a composite material are fabricated by atomic layer deposition and plasma atomic layer deposition, passivation layer plating is carried out on the front surface and the back surface of the crystalline silicon cell, so that the minority carrier lifetime is prolonged, and the photoelectric conversion efficiency of the cell is improved; and SiNx anti-reflection layer plating can be continuously carried out after passivation layer plating, so that passivation and anti-reflection processes can be integrated in the same flow, the cost is reduced, and the yield is improved. The fabrication method is particularly and suitably used for combining with a black silicon technology, and multiple processes are avoided; and moreover, for a double-sided battery, the fact that double-sided passivation is carried out by using the fabrication method is a necessary choice.

The invention belongs to the technical field of battery manufacture, and specifically relates to an isolating membrane for a lithium ion secondary battery, comprising an isolating membrane main body, wherein at least one surface of the isolating membrane main body is coated with a binder-polymer coating, and the binder-polymer coating comprises a binder polymer and a binder, and the binder-polymer coating at least comprises two polymers with different swelling degrees, wherein at least one polymer with lower swelling degree is used as cage construction for holding a certain expansion space for a pole piece of the lithium ion battery, and at least one polymer with higher swelling degree can be well bonded with the pole piece. Because the binder-polymer coating comprises the binder polymer and the binder, and the system is an environmental water system, and the coating coverage rate is 10 percent to 90 percent, the isolating membrane for the lithium ion secondary battery not only can be used for providing the expansion space of the pole piece, but also has small blockage for the hole of the isolating membrane, which cannot have influence on the battery performance. The polymer with high swelling degree can be well bonded with the pole piece so as to effectively restrain the deformation of the battery.

The invention belongs to the field of battery manufacture and relates to a method for testing corrosion resistance of a lead acid battery plate grid. The method comprises the following steps of putting a dilute sulphuric acid solution into a container, respectively putting a battery plate grid to be tested as a positive pole and a battery plate grid as a negative pole into the container, carrying out constant current charging, immersing the charged battery plate grid to be tested in a treatment solution so that surface oxides of the corroded battery plate grid to be tested are dissolved, taking out the battery plate grid to be tested, carrying out drying, calculating weight reduction amount of the battery plate grid to be tested, and carrying out determination on the corrosion degree of the battery plate grid according to the weight reduction amount of the battery plate grid.

Methods are described for fabricating HIT solar cells, including double heterojunction and hybrid heterojunction-homojunction solar cells, with very thin single crystal silicon wafers, where the silicon wafer may be less than 80 microns thick, and even less than 50 microns thick. The methods overcome potential issues with handling these very thin wafers by using a process including epitaxial silicon deposition on a growth substrate, partial cell fabrication, attachment to a support substrate and then separation from the growth substrate. Some embodiments of the present invention may include a solar cell device architecture comprising the combination of a heterostructure on the front side of the device with a homojunction at the rear of the device. Furthermore, device performance may be enhanced by including a dielectric stack on the backside of the device for reflecting long wavelength infrared radiation.

The invention relates to an adhesive tape for electronic products and a production process thereof, in particular to an environment-friendly halogen-free inflaming retarding adhesive tape and a production process thereof. The environment-friendly halogen-free inflaming retarding adhesive tape successively consists of a halogen-free inflaming retarding adhesive layer, a tissue paper layer, a halogen-free inflaming retarding adhesive layer and a double-silicon release paper layer from top to bottom. The halogen-free inflaming retarding glue comprises the following components by weight percent: 50-60% of a mixture of acrylate polymer, adhesive, tackifying resin and fire retardant, 20-30% of acetic ether and 15-20% of toluene. The adhesive tape is an environment-friendly halogen-free inflaming retarding adhesive tape and is mainly applied to winding and fixing in electronic products and adhesion of battery production materials and other inflaming retarding materials (i.e. Normex). The halogen-free inflaming retarding adhesive tape obtained by the production process not only can reach the highest inflaming retarding grade, but also is halogen-free and more environment-friendly under the condition of unchanging the original inflaming retarding function of the adhesive tape.

Belonging to the technical field of lithium-sulfur secondary battery preparation, the invention relates to an all-solid-state polymer electrolyte used for a lithium-sulfur secondary battery and its preparation method. Directed at the current situation that a metal lithium negative electrode is likely to generate a dendrite which can break a diaphragm so as to cause a short circuit when the liquid electrolyte or gel polymer electrolyte of a lithium-sulfur secondary battery matches with metal lithium, the invention provides an all-solid-state polymer electrolyte used for a lithium-sulfur secondary battery. The electrolyte comprises PEO (polyethylene oxide), a Li4Ti5O12 particle and a lithium salt, which can be LiClO4, LiPF6, LiBF4, LiCF3SO3 or LiTFSI. At a temperature of 30DEG C, the electrolyte has electric conductivity greater than 10<-4>S/cm, which is far higher than the electric conductivity of 10<-6>-10<-7>S/cm of PEO/a lithium salt at a temperature of 30DEG C. In a lithium-sulfur secondary battery, the electrolyte can serve both as an electrolyte and a diaphragm, and the double functions can substantially enhance the utilization rate and circulation stability of a positive active material.

The invention discloses a high-capacity high-power ferrous phosphate lithium power battery and a manufacturing method thereof, relating to the technical field of lithium ion secondary batteries. The battery comprises a positive plate, a negative plate, a diaphragm, electrolyte and a battery shell, wherein the positive plate is formed by coating positive slurry on a aluminum foil; the negative plate is formed by coating negative slurry on a copper foil; the positive slurry comprises a positive active material, a bonder and the like; the negative slurry comprises MCMBs (mesocarbon microbeads), a conductive agent, a bonder and the like; and the battery shell comprises a shell and a nut cap. According to the invention, lithium iron phosphate positive material is pretreated, thus improving the electroconductibility of the material and the processing performance of the slurries. By means of an optimal structure design, the battery has the advantages of high capacity and lower internal resistance; and the battery can perform large current charge and discharge, has low temperature rise, and is mainly used as a power supply of an electric vehicle.

The invention provides a general type of porous coordination solids, metal-organic frameworks (MOFs), as an electrode additive to improve thermal stability, rate and cycle performances of batteries, and an electrode having the electrode additive. The incorporation of the MOF additive into the electrode is fully compatible with current battery manufacturing process. Activated MOF additive serves as an electrolyte modulator to enhance cationic transport and alleviates interfacial resistance by interacting liquid electrolyte with unsaturated open metal sites. Moreover, the flow-free liquid in solid configuration is realized by encapsulating liquid electrolyte into porous scaffold of MOF, which offers superior thermal stability.

The invention relates to a transparent conductive film with high velvet value and a preparation method thereof, belonging to the technical field of thin film solar cell manufacturing. The technical solution is: ① On the cleaned glass substrate, use the magnetron sputtering process to prepare a layer of 1000nm-1500nm ZnO transparent conductive layer; ② Keep the gas pressure, substrate temperature, and RF power unchanged, and change the input Argon flow in the reaction chamber to prepare ZnO transparent conductive film; ③The obtained ZnO transparent conductive film is wet-etched; ④After etching, the ZnO transparent conductive film is cleaned with deionized water and dried with nitrogen gas to obtain Textured ZnO transparent conductive film. Advantages and positive effects of the present invention: high velvet, high light scattering ability, high near-infrared light scattering ability, high transmittance, low conductance, and the prepared ZnO transparent conductive film has high scattering transmittance, high transmittance and low resistivity.

Ion implanters are especially suited to meet process dose and energy demands associated with fabricating photovoltaic devices by ion implantation followed by cleaving.

The invention relates to the technical field of battery manufacturing, and discloses thermal composite lamination equipment and a thermal composite lamination method. The thermal composite lamination equipment comprises a first rolling mechanism, a second rolling mechanism, a main conveying mechanism, a first conveying mechanism, a heating conveying mechanism and a second conveying mechanism, and the main conveying mechanism can convey paired diaphragms to sequentially pass through the first rolling mechanism and the second rolling mechanism; the first conveying mechanism can feed a preheated first polar sheet with a preset size into the first rolling mechanism, the first polar sheet is clamped between the diaphragms, and the heating conveying mechanism can compound the diaphragms and the first polar sheet into an intermediate complex; and the second conveying mechanism can convey a preheated second polar piece with a preset size into the second rolling mechanism and enables the second polar piece to be located on the outer side of the diaphragm, and the second rolling mechanism presses the second polar piece and the middle composite body into a material belt. Energy loss is low, the structure is compact, and production efficiency is high.

The invention, relating to the field of cell manufacturing and energy storage, discloses a surface modification method for raising the activity of an electrode material of a vanadium cell, comprising the following steps: firstly cleaning the electrode material of the vanadium cell to remove surface impurities, then carrying out modification treatment of the electrode material by using plasma, reacting the gas which generates plasma with the electrode surface under ionization state to generate polar functional groups; and finally carrying out ultrasonic cleaning on the modified electrode material for 5-30 min and drying at 60-120 DEG C. According to the invention, by using the method of the invention to carry out surface modification on the electrode material of the vanadium cell, the hydrophilcity of the electrode surface is enhanced, partial polar functional groups has good catalytic influence on electrode reaction, and the energy storage efficiency of the cell is expected to increase. The method can be used for processing material surfaces with various morphologies and can keep mechanical properties and the like of material matrixes, the experiment condition are easy to control and the method has no pollution to environment. The method is efficient and environmentally friendly.

A prepn. method for protective film of lithium ion cell. At least one organic polymer among phenolic resin, epoxy resin, polyvinyl acetate, polyurethane, polytetrafluoroethylene, chloronorgutta, phenolic chloronorgutta, epoxy polyamide and phenolic polyvinyl acetal is added into particular solvent selected at least one from diionized water, carbinol, benzene, toluene, chloroform dichloroethylene, diethyl ether, acetone, ethyl acetate and normal ethane, they are mixed and stirred to organic solution which is coated on case of lithium ion cell, then the case is static placed to volatilize particular solvent in the organic solution in room temp. to form a layer of uniform and densify protective film on cell case. Said film can prevent corrding of electrolyte and perspiration in prodn process. The invent is also relates to a solvent used for cleaning said proctive film selected from deionized water, alcohol, acetone, oxolane and formyldimethylamine.

A reactive pressure sensitive adhesive composition is disclosed. A tape formed using the reactive pressure sensitive adhesive is also disclosed. In its cured state, the pressure sensitive adhesive shows superior mechanical and electrical properties compared to conventional, non-curable charge collection tapes. The tape has a cure profile pre-selected to correspond to that of a photovoltaic cell fabrication process, such that curing can take place during cell fabrication and may occur simultaneously with one or more other curing steps employed in cell fabrication.

The invention relates to a method for manufacturing a solar cell. The etching ratio of hydrofluoric acid buffer solution to silica and silicon nitride is skillfully utilized to keep a silicon nitride masking layer as an anti-reflection layer of the cell, therefore, the anti-reflection layer is not needed to be independently manufactured before sintering an electrode, the process is simplified, and the production efficiency is improved. The method utilizes good blocking performance of the silicon nitride to impurities to well solve a problem that the solar cell is selectively doped, thus improving doping density of an area lower than the metal electrode, reducing series resistance, reducing the deposing density of the area outside the electrode, reducing composition of photon-generated carriers and improving short-circuit current. The non-sacrificial silicon nitride masking layer is used for preventing other impurity elements from diffusing to a silicon wafer and using a silicon nitride etching slot in the process as an alignment mark of a main grid line, so that the alignment during the production is simpler.

The invention discloses a front composite film for improving the edge winding and plating color difference of a tubular PERC solar cell, and the front composite film sequentially comprises a SiNx:Hy layer, a SiOxNy layer and a SiOx layer. The SiNx:Hy layer at least comprises five layers of SiNx:Hy with different refractive indexes and thicknesses which are respectively a first SiNx:Hy layer, a second SiNx:Hy layer, a third SiNx:Hy layer, a fourth SiNx:Hy layer and a fifth SiNx:Hy layer, and the SiOxNy layers at least comprise 2-3 SiOxNy layers with different refractive indexes and thicknesse,wherein the SiOx layer at least comprises one SiOx layer with different refractive indexes and thicknesses. By adopting the method, the front edge winding and plating color difference caused by adopting tubular plasma equipment to prepare the back passivation film in the PERC battery manufacturing process can be effectively improved, and the appearance uniformity of the photovoltaic module is improved.

The invention discloses a method for manufacturing a lithium iron phosphate all-solid-state film cell by in-situ spray pyrolysis. The method is characterized in that an in-situ spray pyrolysis technology is adopted; a slightly excess amount of a nonvolatile high-boiling point organic polymer is added into an anode precursor solution so that in a spray process, the anode precursor solution and anode active substances are mixed well; in follow-up heat treatment, a cracking process is carried out in the air-free environment and ferric iron is reduced in situ by carbon obtained by the cracking process so that the lithium iron phosphate all-solid-state film cell is obtained; after in-situ reduction, a trace amount of carbon is utilized as an electronic link of an anode material so that electronic conductivity of the anode material is improved; and in the spray process, through a spray gun, two buffer layers are formed at junction parts of an anode layer, a solid electrolyte layer and a cathode layer and phase composition of each adjacent two of the anode layer, the solid electrolyte layer and the cathode layer continuously changes in the buffer layers. Through the method provided by the invention, adjacent layers are bonded closely; a layer-to-layer matching degree is greatly improved; stress and a crystal boundary are reduced; interfacial conductance is improved; the influences of interfacial conductance on cell integral performances are greatly reduced; and cell stability is improved.