8results about How to "Lower bulk resistance" patented technology

The invention provides low-silver-content conductive paste for a low-temperature curing HJT battery and a preparation method of the low-silver-content conductive paste, and belongs to the technical field of polymer-based electronic paste materials and HJT efficient battery materials. The low-silver-content conductive paste is composed of the following components in percentage by weight: 52-80% of micron-sized silver-coated copper ball powder, 14-42% of submicron-sized spherical silver powder, 1-3% of an organic solvent, 0.5-2% of a curing agent, 2.5-4% of resin and 0-1% of an auxiliary agent. The micron-sized silver-coated copper ball powder is spherical, and the median particle size is 4-6 microns; the submicron spherical silver powder is in a spherical shape or a sheet shape or a combination of the spherical shape and the sheet shape. The median particle size of the submicron spherical silver powder ranges from 100 nm to 900 nm. The prepared HJT conductive paste can be cured at the low temperature of 150-200 DEG C and has good conductivity, printing performance and adhesive force, the silver content in the paste is only 30-50%, the production cost of a solar cell is greatly reduced, and popularization of the heterojunction solar cell is effectively promoted.

The invention belongs to the technical field of silicon solar cells, and particularly relates to a copper electrode material and a method for preparing a copper electrode of a silicon solar cell by using the copper electrode material, the copper electrode material comprises the following components: a copper wire, a tin-bismuth alloy and modified rosin, and the preparation method of the modified rosin comprises the following steps: firstly, taking polyethylene glycol and aniline phenylacetic acid as raw materials; carrying out esterification reaction to obtain aniline modified polyethylene glycol; then, rosin and acrylic acid are used as raw materials, and acrylic acid modified rosin is obtained through a D-A addition reaction; and finally, by taking aniline modified polyethylene glycol and acrylic acid modified rosin as raw materials, carrying out esterification reaction. The invention also provides a method for preparing a silicon solar cell copper electrode by using the copper electrode material. The surface of a copper wire is sequentially coated with a modified rosin layer, a tin-bismuth alloy layer and a modified rosin layer. The copper electrode provided by the invention has relatively low bulk resistance and relatively good oxidation stability, and also has excellent adhesive force and relatively low interface contact resistance when the copper electrode is fused and welded on the surface of a substrate.

The invention belongs to the technical field of target material production, and particularly relates to a metal oxide powder composition, a doped indium oxide target material and a preparation method and application of the doped indium oxide target material. The metal oxide powder composition provided by the invention comprises the following components in percentage by mass: 95.5-99.1% of indium oxide powder, 0.3-1.5% of titanium oxide powder, 0.3-1.5% of zirconium oxide powder and 0.3-1.5% of tantalum oxide powder, an indium oxide doped target prepared from the metal oxide powder composition has low resistance, and a TCO film prepared from the metal oxide powder composition has high mobility and high light transmittance (greater than 85%) in a near-infrared band.

The utility model discloses a low -cost piece formula contact piece jack structure relates to connector technical field, including conductive main part and steel case, and the conductive main part includes the elastic region and the end region of increasing thickness in proper order, and is provided with the transition area of thickness conversion between the elastic region and the end region, is equipped with the elastic contact cantilever on the elastic region, and the steel case sets up on the transition area and cooperates with the elastic contact cantilever on the elastic region. The material of elastic region is thin, and a plurality of contacts are arranged on the elastic contact cantilever, and the conductive function can be realized after contacting with the pin; the transition area is the thick, thin material conversion area; the end region is the connecting area of pencil and similar pencil function components, and generally uses the welding, crimping etc. Mode to realize the connecting function. The steel case is wrapped in the outside of conductive main part, can promote the contact stability and the ageing resistance of elastic region contact, realizes the anti -back function simultaneously, can guarantee the contact stability of contact region, and can solve the problem of few and high cost of existing contact.

The invention relates to the technical field of photovoltaic electronic paste, in particular to the field of IPC H01B1 / 22, and more particularly relates to glass powder for N-type TOPCon battery front face fine grid paste and a preparation method and application of the glass powder. The glass powder comprises the following components: glass powder A and glass powder B, wherein the glass powder A comprises PbO, SiO2, Bi2O3, B2O3, Ag2O, ZnO, Al2O3 and CaO; and the glass powder B is prepared from PbO, SiO2, B2O3, ZnO and BaCO3. The N-type solar cell front fine grid slurry prepared from the glass powder provided by the invention ensures that acetic acid attenuation is within a qualified range, and meanwhile, the photoelectric conversion efficiency of the cell is greatly improved.

This invention discloses a foamed aluminum electrode foil for aluminum electrolytic capacitors and its preparation method, belonging to the technical field of aluminum electrolytic capacitors. The preparation method of the foamed aluminum electrode foil includes the following steps: preparing an aluminum powder slurry, uniformly coating it onto the surface of a pretreated foamed aluminum foil, and then drying and step-by-step sintering to form a strong metallurgical bond between the aluminum powder particles and between the aluminum powder particles and the foamed aluminum matrix, thus obtaining the electrode foil. This invention utilizes the inherent three-dimensional porous structure of foamed aluminum to obtain an ultra-high specific surface area, while simultaneously constructing a highly efficient three-dimensional conductive network through a dense aluminum layer on the surface, significantly enhancing the mechanical strength of the foil. The resulting electrode foil possesses high specific capacitance, low equivalent series resistance, high mechanical strength, and good processability, providing a key material foundation for the preparation of next-generation high-performance, high-capacity, low-ESR aluminum electrolytic capacitors.

The invention discloses a battery piece, a battery string, a photovoltaic module and a photovoltaic power generation system.The battery piece comprises a body, a plurality of first grid lines, a plurality of second grid lines, a plurality of first connecting pieces and a plurality of second connecting pieces, a plurality of first grooves and a plurality of second grooves are formed in the surface of one side of the body, the first grid lines are arranged on the surface of one side of the body, and the second grid lines are arranged on the surface of the other side of the body. The plurality of second grid lines are respectively arranged in the plurality of second grooves, the first grid lines comprise a plurality of first grid line segments, and the first grooves are located between two adjacent first grid line segments; and the plurality of first connecting pieces are respectively arranged in the plurality of first grooves, the plurality of first connecting pieces are respectively and electrically connected with the plurality of second grid lines, the second connecting pieces are arranged on one sides, far away from the body, of the first grid lines, and the plurality of second connecting pieces are respectively and electrically connected with the plurality of first grid lines. According to the arrangement of the battery piece, the first groove and the second groove, short circuit of the battery piece is avoided, the service life of the battery piece is prolonged, and the power of the battery piece is also improved.

The embodiment of the invention provides an N-type TOPCon battery and a preparation method thereof, and the preparation method of the N-type TOPCon battery provided by the embodiment of the invention comprises the steps: carrying out the boron diffusion processing of the front surface of an N-type silicon wafer through employing a rapid heat treatment technology; forming a silicon oxide layer and a polycrystalline silicon layer on the back surface of the silicon wafer subjected to boron diffusion treatment, and performing phosphorus doping on the polycrystalline silicon layer to form a phosphorus-doped polycrystalline silicon layer; and sequentially forming a passivation layer and an electrode on the front surface of the silicon wafer and the surface of the phosphorus-doped polycrystalline silicon layer to prepare the N-type TOPCon battery. The preparation method provided by the invention can effectively solve the problems of long time consumption and low efficiency of the prepared battery in the preparation of the P-type emitter in the N-type TOPCon battery in the prior art.