157results about How to "Guaranteed electrical conductivity" patented technology

The invention discloses a curved circuit three-dimensional printing-oriented base material surface modification and adhesive force enhancement method, which comprises the following steps of: performing surface modification on the surface of an insulating curved surface base material, and integrally plating copper after modification, so that a layer of uniform conductive copper film is formed on the surface of the base material; anti-etching mask ink is selectively jet-printed on the base material, curing is carried out after jet printing is completed until the anti-etching mask ink is completely dried, and an anti-etching film with a conductive pattern is formed on the surface of the insulation curved surface base material; then, the conductive copper film is soaked in etching liquid for selective etching, and the conductive copper film which is not covered with the anti-etching film is gradually dissolved until the original insulating curved surface base material is exposed; and then soaking in an alkaline solution until the anti-etching film with the conductive pattern is completely dissolved and falls off to obtain the insulating curved-surface base material with a clean surface and a complete conductive pattern. According to the method disclosed by the invention, the adhesive force between the conductive material and the insulating curved surface base material is greatly enhanced, and high-precision and high-reliability preparation of the curved surface circuit is realized.

The electroplating barrel plating equipment comprises an electroplating bath and a roller, one end of the roller is rotatably installed on a first supporting plate through a first rotating shaft, the other end of the roller is rotatably installed on a second supporting plate through a second rotating shaft, the roller is provided with an opening capable of being buckled, the opening is used for taking and placing a to-be-plated part, and a plurality of through holes are formed in the side wall of the roller; a plurality of conductive rods are arranged in the roller in the circumferential direction, a plurality of conductive heads are arranged on each conductive rod at intervals, the conductive rods extend in the length direction of the roller, one end of each conductive rod extends to the second rotating shaft to form a conductive end, and a first conductive bearing bush and a second conductive bearing bush corresponding to the conductive ends are arranged on the second supporting plate. The invention further comprises a plating solution forced circulation system. The contact area of the conductive head and a to-be-plated part is increased, the problems of virtual connection and overheating caused by floating of the free conductive head are solved, meanwhile, the plating solution forced circulation system enables the temperature and ion concentration of plating solutions inside and outside the roller to be more uniform, and the electroplating efficiency and quality are improved.

The invention relates to the technical field of LEDs, in particular to a red light LED epitaxial wafer and a preparation method thereof. The red light LED epitaxial wafer sequentially comprises a GaAs substrate, a GaAs buffer layer, an anti-oxidation DBR reflecting layer, an N-type limiting layer, an N-surface micro-strain layer, an N-side space layer, a multi-quantum well active layer, a P-side space layer, a P-surface micro-strain layer, a P-type circulating doping limiting layer, a P-type transition layer and a P-type window layer from bottom to top. According to the invention, the conventional DBR reflecting layer material is adjusted into the antioxidant DBR reflecting layer, and the Al0. 5In0. 5P: C / Al0. 5In0. 5P: Mg periodic cycle doping structure and the like are introduced into the P-type limiting layer, so that the problems of luminous efficiency attenuation, brightness attenuation and the like of a conventional red light LED in a high-temperature and high-humidity environment or under the condition of large current can be effectively solved, and the obtained red light LED epitaxial wafer is good in luminous efficiency stability, high in reliability and wide in applicability.

The invention belongs to the technical field of welding, and particularly relates to a positioning clamp welding device which comprises a rack, a conveying belt, a clamping moving mechanism, a welding mechanism and a turnover mechanism. The conveying belt comprises a plurality of chain plates hinged to one another. The welding mechanism comprises a welding gun; the clamping moving mechanism comprises clamping frames and a second driving device, first limiting grooves are formed in the clamping frames, the clamping frames are assembled on the chain plate in a sliding mode, and the second driving device is used for driving all the clamping frames to synchronously move in a reciprocating mode in the direction parallel to the axis around which the chain plate rotates; the turnover mechanism comprises a second rotating shaft and a third driving device, the second rotating shaft is rotationally assembled on the chain plate, the clamping frames are assembled on the second rotating shaft in a sliding mode in the direction parallel to the axis around which the chain plate rotates, and the third driving device is used for driving all the clamping frames to rotate synchronously. The technical problem that in the prior art, the repair and maintenance cost is increased due to frequent movement of a welding mechanism can be solved.

The invention provides a silicon-oxygen-carbon composite material as well as a preparation method and application thereof, the surface layer of a silicon-oxygen material of a bulk phase of the composite material is lithiated and reduced into silicon, meanwhile, a double-layer carbon structure ensures the conductivity of the material, a plasma carbon coating layer is formed on the surface of SiO by utilizing a PECVD (Plasma Enhanced Chemical Vapor Deposition) technology before pre-lithiation, and the conductivity of the material is improved. After pre-lithiation, a heteroatom porous carbon coating layer is constructed on the surface of the material, so that a surface conductive layer is kept in contact with the inside, and doping modification is realized while carbon coating is performed. According to the preparation method, the microstructure of the pre-lithiated SiO is optimized, the growth of silicon particles in the pre-lithiation process is reduced, a three-dimensional penetrating conductive network is formed by combining the external carbon layer and the internal carbon layer, a channel is provided for rapid transmission of lithium ions, the conductivity of the material is improved, and volume expansion is relieved. The preparation process is simple, the first efficiency of the material is high, the conductivity is good, and the cycle rate capability is good.

The invention relates to the technical field of wire conductive cloth wrapping equipment, in particular to a wire conductive cloth wrapping device. Comprising a rack, two tensioning assemblies capable of straightening a wire rod from the two ends of the wire rod respectively are installed on the rack, and cloth wrapping assemblies are arranged on the upper side and the lower side of the wire rod; the cloth wrapping assembly comprises a pressing plate which can get close to and make the conductive cloth abut against one side face of the wire, and the pressing plate is provided with an air nozzle which can make the horizontal conductive cloth located outside the wire bent towards the other side in a blowing mode. A roller which can be close to the bent part of the conductive cloth is arranged beside the pressing plate; the roller can roll the bent conductive cloth on the other side surface of the wire rod and enable the conductive cloth outside the wire rod to be in a horizontal state again; and the two groups of cloth wrapping assemblies are alternately matched with each other so as to wrap the conductive cloth on the flat wire rod circle by circle.

The invention discloses a room-temperature curing single-component epoxy conductive adhesive and a preparation method and application thereof, and relates to the technical field of conductive adhesives, the single-component epoxy conductive adhesive is prepared from the following components by weight: 100-140 parts of epoxy resin, 20-25 parts of a flexibilizer, 5-15 parts of an epoxy diluent, 10-15 parts of a curing agent, 5-40 parts of silver powder, 4-6 parts of a curing accelerator, and 5-10 parts of single-walled carbon nanotubes. The epoxy resin is one or more of liquid bisphenol A type epoxy resin and liquid bisphenol F type epoxy resin, and the toughening agent is one of phthalic acid esters, polysulfide rubber or polypropylene glycol diglycidyl ether. According to the room temperature curing single-component epoxy conductive adhesive as well as the preparation method and the application thereof, the single-walled carbon nanotubes and the multi-walled carbon nanotubes are added into the prepared single-component epoxy conductive adhesive, so that the conductivity of the single-component epoxy conductive adhesive can be ensured, the cost of the single-component epoxy conductive adhesive is greatly reduced, and the heat conductivity of the single-component epoxy conductive adhesive can be improved.

The invention discloses an antibacterial-waterproof hydrogel biosensor based on a conductive spandex fiber net and a preparation method of the antibacterial-waterproof hydrogel biosensor. The preparation method comprises the following steps: (1) preparing graphene composite elastic spandex conductive fibers by adopting a solution dry spinning method, and weaving the graphene composite elastic spandex conductive fibers into a fiber net; (2) designing a cuboid-shaped mold, and fixing a fiber net on hooks on four edges in a mold groove to serve as a first layer of conductive fiber net structure; (3) preparing a sodium alginate / acrylamide mixed solution blended with nano-silver, and pouring the sodium alginate / acrylamide mixed solution into a mold for in-situ polymerization; 4) transferring the mold into a Ca < 2 + > coagulating bath to form a second layer of gel matrix structure with double networks; and 5) after the gel is completely dialyzed, dipping the gel in a stearic acid / organic silicon emulsion / vegetable oil mixed solution for hydrophobic modification so as to form a third waterproof layer structure on the surface of the gel, and finally obtaining the hydrogel biosensor. The biosensor has conductive, stretchable, antibacterial and waterproof functions and the like, and can be applied to biological strain monitoring.

The invention discloses a boron nitride conductive ceramic evaporation boat and a preparation method thereof. The boron nitride conductive ceramic evaporation boat comprises the following raw materials in parts by weight: 80-100 parts of boron nitride, 30-40 parts of titanium boride, 30-40 parts of zirconium silicate, 10-15 parts of boron oxide, 10-15 parts of nano carbon black, 8-12 parts of silicon carbide, 4-6 parts of nano yttrium oxide and 1-2 parts of polyacrylamide. The preparation method comprises the following steps: (1) weighing the raw materials, and uniformly mixing; (2) wet ball milling; (3) drying; (4) cold isostatic pressing forming; and (5) carrying out hot pressed sintering and cooling. The long-term stability of the product is improved, the produced product has advanced performance and quality, shorter preheating time, better molten aluminum spreading capacity, fewer sputtering and boat bending problems, longer service life and more economic choices, production of various materials such as metallized films, paper and textiles can be met, and the production cost is reduced. The aluminum-plated film is widely applied to the industries of vacuum evaporation packaging materials, capacitor metallization vacuum coating, paper aluminum plating, gold stamping plating, anti-counterfeiting mark aluminum plating and the like.

The invention relates to the technical field of lithium batteries, and discloses a ZIF-derived high-nano-silicon-loaded silicon-carbon negative electrode material, a preparation method and a battery, and the preparation method comprises the following steps: S1, surface modification of nano silicon; s2, preparing a ZIF precursor solution; s3, mixing the surface modified nano silicon with the ZIF precursor solution, and compounding by adopting mechanical ball milling; and S4, carrying out carbonization treatment on the composite material to prepare the ZIF-derived high-nano-silicon-loaded silicon-carbon negative electrode material. According to the preparation method disclosed by the invention, high-uniformity distribution of nano silicon in a carbon-based skeleton is realized based on a mechanical ball-milling method by modifying the surface of the nano silicon, optimizing the structural design of a ZIF material and introducing a silicon precursor, and a carbon network with excellent conductivity is formed by controlling a carbonization process, so that the electrochemical performance and the cycling stability of the composite material are remarkably improved.

The utility model relates to the technical field of battery top covers, in particular to a battery top cover structure. According to the technical scheme, the top cover comprises a top cover body, the top cover body comprises a cover plate, the bottom of the cover plate is fixedly connected with a pole column ring, the inner wall of the pole column ring is connected with a pole column body in a clamped mode, and the pole column body is extruded through a limiting spring; the limiting block can slide out of the limiting groove and slide into the limiting opening under the elastic action of the limiting spring, then the pole body can be fixed, the limiting block and the pole body are clamped, the situation of welding separation can be avoided, then the rotating block is rotated, the rotating shaft can rotate through rotation of the rotating block, the sleeve can rotate through rotation of the rotating shaft, and therefore the pole body can be fixed. The rotation of the sleeve can enable the threaded rod to move in the inner wall of the sleeve, so that the pole body and the cover plate can be attached more tightly, and therefore, the effect of ensuring the conductivity between the cover plate and the pole can be achieved.

The invention relates to a double-layer copper foil as well as a preparation method and application thereof. The double-layer copper foil comprises a first copper layer, an anti-oxidation coating and a second copper layer, the anti-oxidation coating is composed of a metal coating and an organic coating. The anti-oxidation coating adopted by the invention can effectively prevent the copper foil from being oxidized when the copper foil and the prepreg are pressed, so that the conductivity of the copper foil is ensured, and the performance of the printed circuit board is improved; meanwhile, the coating can effectively isolate two layers of copper foils at high temperature, so that the copper foils can be separated from layers, two copper-clad plates with the copper foils can be obtained in one pressing unit, the production efficiency is improved, and the copper-clad plate has good application prospects.

The utility model relates to a high-voltage-resistant paper insulation acetal enamelled transposition wire, which comprises a transposition wire core and a plurality of layers of insulation paper wrapped outside the transposition wire core. The transposed wire core comprises an A enameled wire unit and a B enameled wire unit which are symmetrically arranged, and a C enameled wire arranged in the center of the tops of the two enameled wire units; the enameled wire unit A is formed by stacking a group of enameled wires A, and the enameled wire unit B is formed by stacking a group of enameled wires B; the enameled wire A, the enameled wire B and the enameled wire C all comprise copper flat wires, and the outer surfaces of the copper flat wires are coated with acetal paint layers. A cutting line is arranged between the side part of the A enameled wire unit and / or the B enameled wire unit and the insulation paper, and the end part of the cutting line is clamped at the outer side of the end part of the A enameled wire or the B enameled wire. When the insulation paper needs to be disassembled, the insulation paper can be cut by pulling open the cutting line, and then the insulation paper is torn down by a worker, so that the operation is very convenient, the disassembly time of the insulation paper is greatly shortened, and the labor intensity of the worker is reduced.

The present application relates to the technical field of electric control switch, in particular to a kind of motorcycle disc brake control switch, including shell, two wiring copper sheets, electricity connection copper sheet, slider and cover plate, installation cavity is provided in the shell, installation groove is opened in the symmetrical two inner side walls of installation cavity, and two The wiring copper sheet is fixedly inserted in installation groove;The present application is closed by the setting of cover plate and sleeve, the part of wiring copper sheet in installation cavity is isolated with external environment with electricity connection copper sheet, and the inside of the position of wiring copper sheet through shell can be sealed with sealing glue, simultaneously still can be filled into inert gas in installation cavity, to avoid the water vapor in environment into installation cavity, cause the part of wiring copper sheet in installation cavity and electricity connection copper sheet corrosion Problem, guarantee the conductive property of wiring copper sheet and electricity connection copper sheet, guarantee the stability and waterproof performance of motorcycle disc brake control switch.

The utility model relates to anti -static jumper wire installation technical field, especially anti -static jumper wire quick installation equipment, including installation pincers, including two tongs, the tong head of setting in the tong one end, and the tong mouth of opening in the tong head top, jumper wire, including female buckle gasket and sub buckle gasket, the connecting piece of fixed connection in the one side of sub buckle gasket, the fixed sheet of fixed connection in the other side of sub buckle gasket, the wire of connection in the fixed sheet one side, the utility model discloses a special installation pincers is set, and the special shape of the tong mouth in installation pincers makes it can quickly suit the female buckle gasket, sub buckle gasket and the outside of bolt, through female buckle gasket and sub buckle gasket can pre -separate and stick bolt, and cooperate tong mouth primary fixation can be completed in one operation, changes the cumbersome process that traditional method can need to operate bolt or use additional tool one by one, through jumper wire tightly wraps bolt, guarantees the reliability of connection and the conduction performance.

The utility model discloses a multi -tapped high -voltage conversion transformer, including transformer main part, is provided with the mounting panel at the top of transformer main part, and the inside of mounting panel is opened to have the pressing groove, and the bottom surface embedding of pressing groove is provided with the wiring board, and the coil of wiring board is linked with transformer main part, and the sliding of pressing groove inside is provided with the pressing plate, and the driving groove and the pressing block are provided on the pressing plate, and the pressing block is adjacent with wiring board, and the eccentric wheel is rotatably provided in the driving groove, and the connecting frame is slidably provided on the side wall of mounting panel, and the mounting panel on the one side of connecting frame is opened to have the installation slot, and the plug -in slot is provided in the installation slot, and the plug -in slot is communicated with pressing groove and is opposite with the position of wiring board. Through the improvement of the fixed type tap terminal of traditional transformer, the terminal of transformer is changed to hidden type, reduces the quantity of top connecting plate or wiring post, makes the top structure of transformer more simple, and the risk of damage due to external force impact in the carrying process is reduced.

The invention discloses a welding positioner electrode device and method, and relates to the technical field of welding positioner electrode devices.The welding positioner electrode device comprises an insulating plate connected to a welding positioner, a mounting base is connected to the insulating plate in a penetrating mode, the mounting base and the insulating plate are connected through a bolt, and a plug sleeve is connected to the mounting base in an inserted mode; the mounting seat is connected with the plugging sleeve through a screw, a conductive rod is slidably arranged in the plugging sleeve in a penetrating manner, one end of the conductive rod is in contact with a rotary disc on the welding positioner, the other end of the conductive rod is provided with a wiring module, and a contact pressure maintaining structure is arranged in the plugging sleeve. The current-conducting rod is supported through the reset spring, when the current-conducting rod is abraded, the reset spring extends, the contact pressure between the current-conducting rod and the rotary disc of the welding positioner cannot directly disappear, and the conductivity between the current-conducting rod and the rotary disc is guaranteed.

The utility model provides a kind of carbon fiber flow guide device, including support plate, the both ends of support plate symmetrical installation second fixed plate, install multiple first fixed plate between two second fixed plates, the bottom surface of first fixed plate installs multiple first carbon fiber bundle, the bottom surface of second fixed plate installs multiple second carbon fiber bundle, the bottom end of first carbon fiber bundle with the bottom end of second carbon fiber bundle is in the same plane;The diameter of second carbon fiber bundle is greater than the diameter of first carbon fiber bundle, and second carbon fiber bundle is in the bottom end of second fixed plate and is distributed as "V" shape.The carbon fiber flow guide device provided by the utility model has the advantages of being easy to contact with the slide and avoiding carbon brush conduction failure.

The utility model relates to the technical field of winding equipment, and discloses a winding device for a carbon-coated aluminum foil, which comprises a base, a winding device and a winding device, the deviation rectifying mechanism is arranged at the top end of the base; the deviation rectifying mechanism comprises a fixing frame, the bottom end of the fixing frame is fixedly connected with the top end of the base, a driving motor is fixedly installed on the fixing frame, and an output shaft of the driving motor is fixedly connected with a screw in a sleeved mode. According to the winding device for the carbon-coated aluminum foil, due to the design of the deviation rectifying mechanism, the defects in the prior art are effectively overcome, the guide plate can be flexibly adjusted according to the size specification of the carbon-coated aluminum foil, the winding device can be matched with both narrow-width aluminum foil and wide-width aluminum foil, the application range of the winding device in diversified production scenes is greatly expanded, and the winding device is suitable for popularization and application. And the aluminum foil is effectively prevented from deviating, wrinkling and the like in the winding process, the winding quality is greatly improved, and then the performance and production efficiency of the lithium ion battery are guaranteed.

The invention discloses an anti-static high-pressure-resistant PPR material and a preparation method thereof, and belongs to the field of PPR material preparation. The aluminized glass fibers are pretreated through the composite antistatic agent and the coupling agent, electrostatic adsorption among the aluminized glass fibers can be reduced, the dispersity of the aluminized glass fibers in a PPR matrix is improved, the antistatic effect of the aluminized glass fibers in the PPR material can be brought into play, and the antistatic effect of the aluminized glass fibers in the PPR material can be improved through interaction of the aluminized glass fibers of different sizes. The mechanical property of the PPR material is favorably improved. The beta nucleating agent and the alpha nucleating agent are added to achieve a synergistic effect, the effect of adjusting rigidity and toughness balance of the PPR material is achieved under the condition of not additionally adding a toughening agent, the crystal form of the PPR material is adjusted and controlled by combining subsequent heating temperature control in an extruding machine, and then the PPR material interacts with the aluminized glass fibers, the carbon nanofibers and the wear-resisting agent, so that the wear-resisting property of the PPR material is improved. Therefore, the PPR material has remarkable anti-static performance, electromagnetic wave shielding performance and mechanical performance.

The invention discloses a converter transformer valve side partial discharge test pressurization lead connecting device and method, and the device comprises a conductive part which is made of hard aluminum and has a smooth surface; the universal connecting pieces are mounted at the two ends of the conductive piece; wherein the universal connecting piece located at one end of the conductive piece is used for being connected with a test device; and the universal connecting piece is located at the other end of the guide piece and used for being connected with a converter transformer valve side sleeve. Due to the fact that the conductive part is made of hard aluminum and has high strength, the conductive performance is guaranteed, and meanwhile the convenience of installation with hoisting equipment is improved. The surface of the conductive part is smooth, dust attachment is avoided in the using process, and the problem of suspension discharge interference is solved.

The utility model provides a contact device, a relay and electric equipment. Relates to the technical field of electronic devices. The contact device comprises a contact body, a contact piece and a connecting piece. The contact element is connected with an external circuit; one of the contact piece and the contact body is a copper piece, and the other one of the contact piece and the contact body is an aluminum piece; the connecting piece is arranged between the contact body and the contact piece. The contact body and the contact piece are connected into a whole through the connecting piece, so that the problems of corrosion of a primary battery and difficult combination caused by direct contact of the contact piece and the contact body are avoided, the conductivity between the contact piece and the contact body is ensured, the connection strength of the contact piece and the contact body is improved, the service life of the contact device is prolonged, and the service life of the contact device is prolonged. The connection resistance between the contact device and the busbar is reduced, and the use performance of the contact device is improved.

The present invention relates to the technical field of detecting the outer insulation layer of a conductor, and in particular to a measuring device, comprising an immersion box with a support column and a slidably arranged support seat, wherein saturated salt water is placed in the immersion box, and at least four tensioning wheels are symmetrically and rotatably arranged on the inner side of the immersion box, and slide cylinders are fixedly connected on the left and right sides of the immersion box, and the inner side of the slide cylinder and the outer side of the tensioning wheel can be respectively slidably and rotatably connected with the conductor, and a plurality of tensioning wheels are divided into an upper and a lower part, and the upper tensioning wheel and the lower tensioning wheel make the conductor be arranged in a "U" shape in the immersion box, and the lower conductor can be immersed in saturated salt water, and a second motor is fixedly connected to the top of the support seat, and a winding roller is detachably connected to the end of the main shaft of the second motor, and the conductor can be wound around the outer side of the winding roller through the rotation of the winding roller to achieve winding and form a winding electromagnet, and the other end of the winding roller is rotatably connected to the outer side with a connecting rod.

The invention discloses a conductor equipment core component cross-scale near-net shape manufacturing method, and relates to the technical field of additive manufacturing, and the conductor equipment core component cross-scale near-net shape manufacturing method comprises the following steps: S1, in a forming process, synchronously executing macro-scale and micro-scale monitoring, and associating two types of data through coordinate calibration to obtain cross-scale associated data; and S2, based on the cross-scale associated data, performing fusion analysis with real-time process and environmental parameters, and outputting a process parameter adjustment direction according to conductor exclusive analysis logic. According to the cross-scale near-net-shape manufacturing method for the core component of the conductor equipment, the overall manufacturing quality and production efficiency of the core component of the conductor equipment can be remarkably improved, the deviation of the size and the organization structure is recognized in real time in the forming process through synchronous monitoring and data fusion of the macroscale and the microscale, and the manufacturing quality of the core component of the conductor equipment is improved. And intelligent analysis is carried out based on the characteristics of the conductor material, and dynamic optimization and closed-loop regulation and control of process parameters are realized.

The invention belongs to the technical field of electrode preparation, and particularly relates to a ruthenium-doped nickel-based catalyst electrode and a preparation method and application thereof. The preparation method comprises the following steps: dissolving fluorine-containing ion salt in a mixed solution of ethylene glycol and glycerol, and then mixing with water to obtain an anodizing solution; the nickel-based substrate is put into an anodizing solution for anodizing treatment, in the anodizing treatment process, the nickel-based substrate is etched by fluorine-containing ion salt, a porous hydroxyl nickel oxide catalytic layer is formed on the surface of the nickel-based substrate, and a nickel-based catalyst electrode is obtained; and dipping the nickel-based catalyst electrode in a ruthenium-containing solution, and drying to obtain the ruthenium-doped nickel-based catalyst electrode. The preparation method disclosed by the invention is simple in process, mild in condition and easy for large-scale production, the catalytic activity and the stability of the ruthenium-doped nickel-based catalyst are also remarkably improved, particularly, the long-term stable hydrogen production performance is realized under high current density, and the energy consumption and the cost of hydrogen production by electrolyzing water are effectively reduced.

This application discloses a composite photovoltaic ribbon and a photovoltaic module. The ribbon includes a ribbon substrate, which comprises an aluminum layer and a copper layer. The copper layer includes a first copper layer disposed on at least a portion of the outer peripheral surface of the aluminum layer. The mass ratio of the copper layer to the aluminum layer is 1:9 to 9:1, and the thickness of the first copper layer is greater than or equal to 2 μm. This application differs from the prior art in that it uses only copper as the ribbon substrate by adding an aluminum layer, reducing the amount of copper used and lowering the cost of the ribbon substrate. Furthermore, by limiting the mass ratio of the copper layer to the aluminum layer and the thickness of the copper layer, the electrical conductivity and mechanical properties of the ribbon substrate are ensured to meet requirements.

The utility model discloses a negative pole piece, a battery and an electric device, and relates to the technical field of batteries. The negative pole piece comprises a current collector and a negative active material layer arranged on the surface of the current collector, a bonding part is arranged between the current collector and the negative active material layer, and the bonding part covers a local area of the current collector and is bonded with the negative active material layer and the current collector. The bonding part is arranged between the current collector and the negative electrode active material layer, so that the bonding strength between the current collector and the negative electrode active material layer is improved, and the risks of powder falling in the subsequent hot pressing process and film stripping in the subsequent charging and discharging process are reduced. Moreover, the bonding part only covers the local area of the current collector, so that the partial area of the current collector is still kept to be directly connected with the negative active material layer, and the conductivity of the negative pole piece can be ensured. The battery provided by the utility model comprises the negative pole piece, so that the negative pole piece is not easy to demould, and the performance is stable.

The invention relates to a blended conductive yarn and a preparation method thereof. During preparation, conductive fibers and insulated clothing fibers are used as raw materials, and the blended conductive yarn is prepared by adopting a double-feeding double-carding rotor spinning process; in the raw materials, the content of the conductive fibers is 5-10 wt%; the conductivity-softness-strength index W of the blended conductive yarn is 1.7-19.85 (10cm < 2 >) / (omegag); the conductive fibers in the blended conductive yarn gather in the yarn and are distributed in a three-dimensional spiral shape in the axial direction of the yarn to form a continuous conductive path, and the conductive fibers are tightly surrounded and wrapped by the insulated garment fibers. According to the preparation method disclosed by the invention, the control on the conductivity of the yarn is realized by accurately adjusting the mixing ratio of the conductive fibers to the insulated clothing fibers and the fineness of the yarn; the blended conductive yarn can achieve high conductivity under the condition of low initial modulus, and meanwhile the breaking strength is considered.

The present invention provides a flexible, wrinkled, stretchable metal current collector and a preparation method and application thereof, belonging to the technical field of energy storage batteries. The flexible, wrinkled, stretchable metal current collector of the present invention comprises a flexible substrate layer, a semi-solidified PDMS layer and a metal layer arranged in sequence from bottom to top, and the preparation method comprises cutting the flexible polymer substrate into a disc shape, spin-coating the PDMS glue onto one side of the disc-shaped flexible polymer substrate, and depositing a metal particle target material on the surface of the semi-solidified PDMS layer after drying to form a metal layer. The flexible, wrinkled, stretchable metal current collector of the present invention adheres a metal layer to the upper surface of the semi-solidified PDMS layer, and the ultra-thin metal layer is tightly adhered to the surface of the soft semi-solidified PDMS layer, and utilizes its good flexibility and stretchability to release the stress accumulated by lithium during the charge and discharge cycle deposition process, thereby making lithium deposited uniformly, thereby inhibiting the formation of lithium dendrites, and further improving the coulombic efficiency and cycle life of the battery.

The invention discloses an anti-aging cable and a preparation method thereof, and relates to the technical field of cables. According to the preparation method, graphene oxide is treated firstly, so that the dispersity of graphene in a linear low-density polyethylene matrix is enhanced, meanwhile, the compatibility between polyethylene and polyimide is improved, thermal motion of a polyethylene molecular chain is hindered, the mechanical property and low expansion property of the cable are enhanced, and then water tree aging resistance is achieved; according to the present invention, the composite material is used as the insulating material and the sheath material to coat the wire core and the wire made of the conductive alloy, the coupling plasma treatment is performed on the insulating layer, and the surface chemical composition reconstruction is performed, such that the surface hydrophobicity can be achieved through the insulating layer after the long-time work of the cable so as to enhance the water tree aging resistance of the cable;