312 results about "Graphene coating" patented technology

The invention relates to the technical field of power transmission, in particular to a moisture-proof cable which sequentially comprises a conductive wire core, a gradient buffer layer, a dynamic sealing layer, a flexible supporting layer and a self-repairing sheath from inside to outside. A gradient buffer layer; the dynamic sealing layer is of a split type sealing structure formed by an outer ring surface sealing lip and an inner ring surface static sealing belt, the outer ring surface sealing lip is formed by embedding a polytetrafluoroethylene fiber reinforcing layer in a silicone rubber matrix, and the surface of the outer ring surface sealing lip is coated with a humidity response type graphene coating; the flexible supporting layer is formed by spirally winding a nickel-titanium alloy belt, and bionic fish scales are welded to the surface of the nickel-titanium alloy belt; the self-repairing sheath is characterized in that a hexagonal honeycomb structure is molded on the outer layer, hydroxyl-terminated polysiloxane and a platinum catalyst are contained in an A-type microcapsule, and modified epoxy resin is contained in a B-type microcapsule. The moisture-proof cable shows excellent corrosion resistance, moisture resistance and self-repairing capability in a humid environment, and can maintain good performance when subjected to external physical impact.

The invention discloses a graphene flat cable coating anti-drop FPC connector, and relates to the technical field of connectors, the graphene flat cable coating anti-drop FPC connector comprises a connector body, a flip cover body is rotatably arranged above the connector body, a terminal body is arranged in the connector body in a butt joint manner, and a flexible flat cable body is arranged in the connector body in a butt joint manner. A movable groove is formed in the rear side of the connector body, a terminal abutting mechanism is arranged in the movable groove, and the terminal abutting mechanism abuts against the terminal body through the flip cover body so as to reduce contact with the flexible flat cable body. According to the anti-drop FPC connector for the graphene flat cable coating, the lower side of the flexible flat cable body is provided with the graphene layer capable of enhancing the conductivity and the heat dissipation performance of the flexible flat cable body, and the inclined guide part arranged at the front side of the connector body can be used for performing butt-joint plugging guide on the flexible flat cable body, so that the graphene coating arranged at the lower side of the flexible flat cable body is protected; the contact area of the graphene and the plastic wall is reduced, and the graphene layer is prevented from being damaged.

The invention provides a shell, a preparation method thereof and electronic equipment. The shell provided by the embodiment of the invention comprises fiber cloth; the graphene coating is coated on the periphery of a part of the fiber cloth; the surface of the fiber cloth and the surface of the graphene coating are wrapped with the resin layer. The shell provided by the embodiment of the invention has relatively high rigidity and heat conductivity coefficient, and does not affect the transmission of electromagnetic wave signals.

The invention relates to the technical field of power electronic components, and discloses a high-temperature-resistant electrolytic capacitor which comprises the following components in parts by weight: 80-90 parts of a graphene or carbon nanotube coating used for preparing an electrolytic capacitor shell; the invention further provides a preparation method of the high-temperature-resistant electrolytic capacitor, and the preparation method comprises the following steps: heat conduction optimization design: simulating a temperature field of the electrolytic capacitor through an unsteady-state heat conduction equation, optimizing a heat dissipation path of the electrolytic capacitor, and improving the heat dissipation performance of the electrolytic capacitor; and heat can be uniformly conducted to an external heat dissipation device. By introducing the microencapsulated phase change material, the graphene coating and the accurate temperature sensor array and optimizing heat dissipation design, efficient heat dissipation, temperature balance and long-term stability of the electrolytic capacitor in a high-temperature environment are achieved, the working performance of the electrolytic capacitor is remarkably improved, and the service life of the electrolytic capacitor is remarkably prolonged.

An electrical connection for a vehicle and methods of forming an electrical connection for a vehicle. The electrical connection includes a first electrical component including a first joining area. The electrical connection also includes a conductor including a second joining area. The conductor is joined at the second joining area to the first joining area of the first electrical component. In addition, the electrical connection includes a fusion zone formed in the first electrical component in the first joining area. The conductor includes a copper-graphene multilayer composite formed on the surface of the conductor, the composite including at least one of the following composite structures: a) alternating layers of graphene and copper deposited on the substrate, b) graphene particles dispersed in a copper matrix, and c) alternating layers of graphene and copper deposited on a copper foil, wherein the copper foil is wrapped around the substrate.

The embodiment of the utility model provides a heat pump system. The heat pump system comprises an evaporator, a compressor and a condenser which are communicated in sequence. The evaporator absorbs heat in air to heat a medium, the compressor compresses the medium heated by the evaporator, and the compressed medium is subjected to heat exchange through the condenser; wherein the evaporator comprises an evaporator pipeline and fins arranged on the evaporator pipeline, and a first graphene coating is arranged on the outer surface of each fin; the condenser comprises a shell and a heat exchange tube set, the shell is provided with a containing cavity, the heat exchange tube set is arranged in the containing cavity, and a second graphene coating is arranged on the outer surface of the heat exchange tube set. The working efficiency of the heat pump system is improved.

The invention relates to the technical field of composite metal materials, in particular to a silver-coated graphene copper composite material and a preparation method thereof, and aims at solving the problems that traditional silver-coated copper powder is high in silver consumption, copper is oxidized due to the fact that a silver layer is prone to being damaged, and conductivity is insufficient. The method comprises the steps that a graphene coating layer is formed on a copper powder substrate in situ through chemical vapor deposition, and graphene copper powder is obtained; performing etching treatment on the graphene copper powder to controllably expose part of the copper substrate so as to form anchoring points for silver ion deposition; carrying out reduction treatment on the etched graphene copper powder so as to ensure that an anchoring site has chemical activity; in a reductive liquid phase environment, enabling a chemical silver plating solution to react with the graphene copper powder subjected to reduction treatment, and guiding silver ion deposition by utilizing an anchoring point, so as to form a silver coating layer on the surface of the graphene coating layer; and separating and drying the reacted system to obtain the silver-coated graphene copper composite material. The material is better in oxidation resistance and conductivity, and the process is free of waste liquid.

The present invention relates to the technical field of photovoltaic cables, and more specifically, to a cold-resistant and ice-resistant cable for photovoltaic power stations. The cable comprises a conductor layer, an elastic insulating layer, and a protective layer arranged from the inside out. The cable further comprises a buffer assembly, and the buffer assembly comprises a fixed part and a movable part. In the present invention, when ice particles contact the surface of the cable, the graphene coating deforms inward, so that the impact of the ice particles is transmitted through the graphene coating to the rubber membrane layer, and the rubber membrane layer then drives the movable rod to move into the insulating tube. During the movement, the rubber membrane layer itself squeezes the outer shielding layer and the inner insulating layer, causing the outer shielding layer and the inner insulating layer to undergo elastic deformation, and the movement of the movable rod drives the connecting ring to move downward, and then pulls the auxiliary elastic ropes on both sides through the connecting ring, causing the auxiliary elastic ropes to undergo elastic deformation, further eliminating the impact of the ice particles, thereby achieving force unloading treatment of the impact and avoiding damage to the cable cortex.

The invention discloses a composite resin material for packaging a fuel cell and a preparation method of the composite resin material. The composite resin comprises bisphenol F type epoxy resin, alicyclic epoxy resin, acrylate resin, a toughening agent, nano silicon dioxide particles, a long-chain aliphatic amine curing agent, an imidazole accelerant and graphene coating carbon fibers. Bisphenol F and alicyclic epoxy resin are compounded, acrylate resin is combined to form a rigid-flexible three-dimensional network matrix, nano-silica treated by a silane coupling agent is introduced to improve moisture resistance, and graphene coating carbon fibers with oxygen-containing groups on the surface are utilized to enhance interface bonding force. And a cross-linked network is regulated and controlled through the coordination of the long-chain fatty amine curing agent and the imidazole accelerant. The obtained composite resin has excellent temperature resistance, moisture resistance, mechanical properties and interface bonding strength, effectively solves the problem of performance degradation of a traditional packaging material in high-temperature, high-humidity and corrosive environments, and meets the strict use requirements of fuel cells.

Some embodiments of the present disclosure relate to a roofing material, wherein the roofing material may comprise a plurality of coated roofing granules, wherein each of the plurality of the coated roofing granules may comprise a roofing granule having an outer surface; and a granule coating, wherein the granule coating is disposed on at least a portion of the outer surface of the roofing granule, and wherein the granule coating comprises graphene. Some embodiments of the present disclosure relate to a roofing material, wherein the roofing material may further comprise a reflective base coating, wherein the reflective base coating is positioned between the outer surface of the roofing granule and the granule coating.

The invention discloses an intelligent high-safety lithium battery fault experiment device and a prediction control system. A four-layer composite protection cover and a multispectral monitoring window are integrated, and a three-dimensional safety barrier is formed from physical protection to real-time monitoring. The four layers of protective covers resist impact through the metal alloy layer, absorb energy through the honeycomb layer, insulate heat through the ceramic layer and uniformly dissipate heat through the graphene coating, so that thermal runaway diffusion is effectively inhibited; the multispectral monitoring window is combined with infrared thermal imaging and high-speed camera shooting, temperature abnormity and battery deformation are captured in real time, and accurate data support is provided for early warning. An LSTM model carried by the edge calculation unit predicts the thermal runaway risk 5-10 minutes ahead of time by fusing the temperature gradient, the gas concentration change and the voltage spectrum characteristics, triggers a grading response strategy, and forms a progressive active protection mechanism from sound-light alarm and liquid nitrogen directional cooling to millisecond power failure and aerosol fire extinguishing; and the device is suitable for electric vehicle battery packs and other complex scenes, and the scientific research practicability and industry universality of the device are remarkably improved.

A self-cooling overhead bare conductor relates to the technical field of power transmission equipment and structurally comprises a conductor substrate, a graphene coating used for radiating heat is arranged on a backlight surface of the conductor substrate, and the coverage range of the graphene coating in the circumferential direction of the conductor substrate is 120-180 degrees. The graphene coating is arranged in a segmented mode in the length direction of the wire base body, the length of each segment of the graphene coating is 5 / 3-2 times of the diameter of the wire base body, and the distance between every two adjacent segments of the graphene coating is 0.85-1 time of the diameter of the wire base body. Sand blasting treatment is carried out on the joint face of the wire base body and the graphene coating, the surface roughness is Ra3.2-6.3 microns, oxidation films and impurities on the surface of the wire base body are removed, the adhesive force of the graphene coating is enhanced, and the thickness of the graphene coating is 40-80 microns. According to the invention, the technical problem of current limiting caused by temperature rise of the wire can be solved.

The utility model discloses a diving fabric implanted with patterns. The diving fabric comprises a foamed chloroprene rubber sponge sheet, a graphene coating, a patch, a floral pattern layer and a titanium coating. The foamed chloroprene rubber sponge sheet subjected to compression treatment is used as a base material, the compressed sponge sheet is higher in apparent density, the internal hash molecular structure of the sponge sheet is tighter, the surface of the sponge sheet is smoother, printing materials such as printing ink can better permeate into the surface layer of the sponge sheet, and patterns and the sponge sheet are fused together; a layer of textile fabric does not need to be added between the floral patterns and the sponge sheet, the floral patterns can be better presented while environmental protection is achieved, and the service life of the floral patterns is prolonged. In addition, the titanium coating enables the floral patterns to be better in oxidation resistance and friction resistance, the floral patterns printed on the sponge sheet can be better protected, the corrosion resistance and abrasion resistance of the floral patterns in a seawater environment are improved, the service life of the floral patterns is prolonged, and the attractiveness of the floral patterns is improved.

The application discloses a graphene-diamond composite coating and a preparation method and application thereof, and belongs to the technical field of materials. The graphene-diamond composite coating comprises a diamond coating and a graphene coating; graphene sp2 bond structure is covalently combined with diamond sp3 bond structure; and the graphene coating has a graphene structure with non-parallel growth mainly in a vertical direction. The graphene-diamond composite coating has small lattice mismatch between the diamond and the graphene, avoids volume expansion caused in a friction heat process, and has the advantages that the diamond coating can provide a support layer for the graphene, forms super-strong C-C covalent bonds at an interface, and significantly improves the adhesion strength of the graphene; the graphene can avoid brittle fracture of the diamond, and significantly improves the lubricating performance of the surface of the diamond coating. The composite coating has better wear resistance, a low friction coefficient and excellent oxidation resistance, and can remain stable under high-temperature and high-load working conditions, so that the service life and processing efficiency of wear-resistant parts are improved.

The invention discloses a preparation method of a graphene composite coating with multifunctional characteristics, which comprises the following steps: processing a substrate, coating a carbon source polymer solution on the surface of a substrate material to form a polymer liquid film, and treating a polymer to form a polymer film; laser induction: carbonizing the polymer film by using laser to form a laser-induced graphene (LIG) coating; functional particles are added, nanoparticles are doped on the surface of the LIG coating in a coating mode, and a composite structure is formed; integrating the multifunctional coating, and forming the graphene-based multifunctional composite coating through post-treatment.

The invention discloses a static pressure forming process for a stainless steel marine pipeline. The performance of the pipeline is improved through material optimization and process innovation. The method comprises the following steps: selecting materials according to a service environment and carrying out cold rolling-annealing pretreatment: respectively carrying out 30%-40% cold rolling on 316L and 2205 dual-phase steel or N08367 corresponding to different working conditions, then carrying out protective atmosphere recrystallization annealing and water quenching at the temperature of more than or equal to 200 DEG C / s, and cooperating with pulse laser cleaning to retain a CrOfilm; in the forming stage, a silicon-based shear thickening fluid medium is adopted, segmented pressurization is matched with axial tension regulation, and the wall thickness deviation is smaller than or equal to 0.1 mm. And optimizing the 2205 steel phase proportion through subsequent pulsed magnetic field annealing. Electrochemical polishing Ra < = 0.15 mu m and a graphene coating are adopted for surface finishing, so that the fluid resistance is reduced, and the salt mist service life is 3 times that of a traditional process. According to the technology, through the synergistic effect of fluid dynamic response and magnetic field regulation and control, the problems that a traditional formed wall is uneven in thickness, insufficient in corrosion resistance and the like are solved.

The invention discloses a rare earth aluminum alloy cable material, a preparation method and application of the rare earth aluminum alloy cable material to a power transmission line, the cable material comprises, based on the total weight, 0.3-0.6 wt% of Er, 0.1-0.3 wt% of Yb, 0.05-0.15 wt% of Ce, 0.35-0.5 wt% of Mg, 0.2-1.5 wt% of Cu, 0.1-2.5 wt% of nano SiC particles, 0.1-0.3 wt% of graphene and the balance Al and impurities, the cable material is designed by adopting a three-layer gradient structure, the middle layer contains 0.1-0.2 wt% of Er and 0.01-0.2 wt% of graphene, and the core layer contains 0.5-0.6 wt% of Er and less than 0.01 wt% of graphene; during preparation, the composite wire with the thickness ratio of the core layer to the middle layer being 1: 3-3: 1 is formed through argon protection smelting, ultrasonic dispersion of nano-particles and static magnetic field assisted co-extrusion, and the surface roughness is enhanced in combination with micro-arc oxidation (Ra = 0.5-1.5 microns). The cable material is excellent in tensile strength, dynamic fatigue life, electromagnetic shielding performance and corrosion resistance through Er gradient distribution, SiC / graphene coating and multi-scale interface synergistic effect.

The invention discloses an H-shaped armature of an electromagnetic rail gun, and belongs to the technical field of electromagnetic emission. The wind power generation device comprises a windward front surface, a windward curved surface, a windward inner surface, a top surface, a bottom surface, side surfaces, a leeward front surface, a leeward curved surface and a leeward inner surface, the graphene film is characterized in that both the top surface and the bottom surface are coated with graphene. According to the invention, the stability in electromagnetic emission is better, the emission efficiency can be effectively improved, and the graphene coating is coated on the surface of the armature in combination with the shape, so that the armature can reach a higher average speed and has a better arc ablation resistance effect, and the armature also has a certain lubrication effect; the conductive filler can be used as a good interface conductive filler to improve the contact state of a pivot rail interface. Therefore, the problems of'planing ', 'ablation', 'adhesion ', 'transition' and the like in the electromagnetic gun launching process are further improved.

The invention discloses an anticorrosive graphene coating and a preparation method thereof, and belongs to the technical field of coating preparation, and the coating comprises the following components in parts by weight: 80-95 parts of water-borne epoxy resin, 8.5-9.5 parts of graphene anticorrosive filler, 0.5-1 part of a flatting agent, 0.5-1 part of a defoaming agent, 7-9 parts of a curing agent and 0.2-0.3 part of a dispersing agent. The addition of the phytic acid solution and the pretreatment of the Na-montmorillonite can synergistically enhance the impact resistance and corrosion resistance of the coating prepared by the invention.

The invention relates to the technical field of bionic electronic skin and flexible sensing materials, in particular to an AF / rGO fiber tactile system and method.The AF / rGO fiber tactile system and method.The AF / rGO fiber tactile system and method are specifically characterized in that aramid 1414 fibers are adopted as a base material, subjected to ultrasonic cleaning and then repeatedly soaked in a graphene oxide solution, a graphene oxide coating is loaded on the surface of the aramid 1414 fibers, and the AF / rGO fiber tactile system is obtained; reducing into a graphene oxide coating by utilizing steam reduction, and performing hot pressing synergism to prepare an AF / rGO fiber sensor; the piezoresistive and thermosensitive effects of the fiber are utilized, the fiber serves as a core material of the sensor and is connected with two electrodes to be assembled into the sensor, mechanical and temperature stimulation is converted into resistance signal change, and the pressure and temperature sensing capacity of the skin is simulated through multi-mode fusion and signal processing. Based on the contact resistance dynamic response of the micro-scale structure, combining a neural network algorithm to realize fabric recognition and gesture recognition; and meanwhile, fire early warning is triggered through temperature resistance signal change by utilizing the flame-retardant characteristic of the aramid fiber substrate.

The utility model discloses a building water supply and drainage pipeline anti-blocking device which comprises a water supply and drainage pipe, internal threads are arranged on the inner wall of the water supply and drainage pipe, the inner wall of the water supply and drainage pipe is in threaded connection with a filter cartridge, and the inner wall of the filter cartridge is connected with a coarse filter screen. Through the arrangement of a coarse filter screen, a fine filter screen, a graphene coating, an internal thread and a filter cartridge, coarse and fine impurities entering the water supply and drainage pipe can be filtered through the coarse filter screen and the fine filter screen, a large number of impurities effectively enter the water supply and drainage pipe, and the water supply and drainage pipe is prevented from being blocked; through arrangement of an annular water pipe, a backwashing spray head, a high-pressure water supply pipe, a control water valve and a pressure regulating valve, the control water valve can be opened to realize water supply of the annular water pipe, and water is sprayed out through the backwashing spray head, so that backwashing of the filter cartridge can be realized, impurities adhered to the filter cartridge are effectively removed, and water impurities are effectively filtered; the blockage phenomenon in the water supply and drainage pipe is effectively avoided.

The utility model relates to lead -acid battery technical field, concretely is a kind of lead -acid battery current collector structure, including frame, recess is opened in the frame, the recess is equipped with porous carbon framework, the porous carbon framework is equipped on battery current collector main body, the battery current collector main body is attached with a layer of carbon cloth, the battery current collector main body is by surface body, aperture plate and grid three parts are composed, the grid is attached with one side graphene coating layer. The recess in the lead -acid battery current collector frame of the device is equipped with one side porous carbon framework, can increase the utilization of active material, improve the charge transfer efficiency of battery, the surface body of battery current collector main body is equipped with graphene coating layer, can significantly reduce the corrosion of surface body, improve the conductivity and current density of battery, the lead -acid battery current collector surface layer is equipped with a layer of carbon cloth, wherein carbon cloth and lead -acid battery current collector cooperate and have the charge-discharge performance and cycle life of the improvement of lead -acid battery.

The present invention provides an atmospheric water extraction device and operating method based on hygrochromic drive. The device is composed of a hygrochromic material, a graphene coating, a radiative cooling coating, and a water collection chamber. The present invention utilizes the changes in the spectral properties of the hygrochromic material during the water adsorption-desorption process to effectively reflect or fully transmit sunlight to control the temperature of the hygrochromic material, thereby realizing an atmospheric water extraction process that is completely driven spontaneously by humidity and temperature. Graphene is used as the bottom coating of the hygrochromic material, and its excellent photothermal capacity is utilized to promote the desorption process of water in the hygrochromic material. A radiative cooling coating is used to cool the top surface of the water collection chamber to promote the condensation and collection process of water vapor. The present invention does not require sunshade equipment, manual intervention, or additional power input, and can spontaneously control the adsorption and desorption processes in atmospheric water collection. It has great application prospects in water collection in arid areas.

The present application relates to graphene material and its preparation technology, specifically to a method for growing graphene on the surface of non-metallic particles on a large scale, which is suitable for large-scale preparation of graphene-coated non-metallic powder material. The present application uses a two-step method to grow graphene uniformly on the surface of a large number of non-metallic particles: first, mix a large number of non-metallic particles with a carbon source, and form a bulk composite material of non-metallic particles and carbon through low-temperature carbonization; then, pass current to the above bulk composite material using electrodes to heat it to a higher temperature, convert the carbon into graphene, until graphene-coated non-metallic particles are obtained, which are separated from each other, and the high-temperature heating process stops spontaneously. The present application can grow a graphene layer on the surface of a large number of non-metallic particles, the method is easy to scale up, and has the characteristics of good uniformity of graphene coating and high particle separation degree; at the same time, by taking advantage of the large resistance of graphene-coated non-metallic particles which are separated from each other, the high-temperature heating process stops spontaneously.

The application discloses a capacitor degradation state control method, device, medium and product, and the method is: obtaining the running state data, the first response signal and the first transient voltage recovery sequence of a graphene coating capacitor, and analyzing to obtain the electrical impedance spectrum characteristics and the transient recovery characteristics; matching the analysis results in the preset degradation characteristic library to obtain a degradation matching set; if the set meets the preset degradation condition, compensating the first response signal and the first transient voltage recovery sequence by using the obtained external environment data, and determining the degradation state data based on the second response signal and the second transient voltage recovery sequence obtained after compensation; and determining the target running control parameter of the graphene coating capacitor based on the degradation state data to control its safe operation in the degradation state. The application can accurately identify the degradation defects of the graphene coating capacitor and control its degradation state accordingly, so that the risk of capacitor out-of-control caused by the degradation defects can be overcome.

A battery pack and a cover for a battery pack are provided. A battery pack according to the present invention can include a battery pack case in which an accommodation space portion is divided in which a plurality of battery modules are accommodated, the battery pack case having an open side, and a cover installed to cover the side of the battery pack case and having a graphene coating formed thereon.

The utility model discloses an efficient and even heating oven, which relates to the technical field of ovens, and comprises an oven body, an electric heating plate used for contact type heating is mounted at the inner bottom of the oven body, an upper heating assembly used for radiation and heat convection heating is mounted at the inner top of the oven body, an oven tray is placed in the oven body, and a lower heating assembly used for radiation and heat convection heating is mounted at the inner top of the oven body. An opening of the baking tray faces upwards, the bottom of the baking tray makes contact with the electric heating tray, the upper heating assembly comprises an assembling frame, a plurality of strip-shaped open holes are formed in the lower surface of the assembling frame, an electric heating radiation pipe is installed in the assembling frame, a cover plate is installed above the assembling frame, and a second temperature sensor is installed on the outer wall of the cover plate. The problems that when an existing oven is used, although the temperature rising efficiency is improved through a graphene coating, heat needs to be blown to food through a fan after temperature rising, in the process, heating is conducted completely depending on gas convection generated by the fan, and the efficiency is low are solved.

The utility model provides an evaporator with an anti-corrosion oil removal coating, and relates to the technical field of evaporators with anti-corrosion oil removal coatings, the evaporator comprises a copper pipe, fins are arranged on the surface of the copper pipe, a graphene coating is coated on the surface of the copper pipe, a water-based paint coating is coated on the surface of the graphene coating, and the water-based paint coating is coated on the surface of the copper pipe. A dismounting device is arranged on the surface of the fin, a protection device is arranged on the surface of the copper pipe, the dismounting device comprises an arc groove formed in the surface of the fin, the copper pipe is arranged in the arc groove, a groove is formed in the side face of the fin, a protruding block is fixedly connected to the side face of the fin, and a clamping ring is fixedly connected to the surface of the protruding block. The inner wall of the arc groove is fixedly connected with a cushion block, the cushion block is tightly attached to the surface of the copper pipe, the inner wall of the arc groove is provided with an annular groove, the surface of the copper pipe is fixedly connected with a clamping plate, and the problem that fins on the surface of an evaporator cannot be disassembled and assembled is solved.

The application relates to the technical field of liquid cooling plates, and particularly discloses a graphene-coated liquid cooling plate, which comprises an upper substrate, a lower substrate and a graphene coating, the upper substrate is provided with a groove, a flow channel for circulating cooling liquid is formed between the upper substrate and the lower substrate through the groove, the flow channel is connected with an inlet and an outlet respectively, the graphene coating is arranged on one side of the lower substrate away from the upper substrate, the graphene coating is provided with concave unit microstructures arranged in an array, the upper substrate and the lower substrate are connected through rolling, and the flow channel is prepared through blow molding. The graphene-coated liquid cooling plate utilizes the excellent heat conductivity of the graphene coating to conduct heat to the cooling liquid in the flow channel of the liquid cooling plate, the concave unit microstructures on the surface of the graphene coating can increase the heat exchange area to sufficiently dissipate and transfer heat, the heat exchange efficiency is improved, and the heat dissipation effect of the liquid cooling plate is improved. The rolling connection-blow molding is adopted to improve the sealing reliability and overall formability of the liquid cooling plate.

The utility model belongs to the technical field of automobile brake systems, and particularly relates to a light-weight automobile brake disc. The outer side of the disc body is provided with an arc-shaped groove and embedded radiating fins, and the groove is filled with a heat-conducting silica gel layer; a mounting hole is formed in the center of the disc body, honeycomb lightening holes are formed around the disc body, and a tungsten carbide coating is sprayed on the inner wall; a first reinforcing rib and a second reinforcing rib are arranged on the two sides of the disc body and are welded and fixed through a connecting plate. The disc body is made of an aluminum alloy base material, the surface of the disc body is subjected to anodic oxidation and graphene coating treatment, and the disc body has both light weight and corrosion resistance. By optimizing the structural design, the weight is remarkably reduced while the strength is guaranteed, the heat dissipation performance is improved, and the automobile brake pad is suitable for a high-performance vehicle brake system and meets the requirements of modern automobiles for light weight and efficient heat dissipation.