48results about How to "Performance impact" patented technology

The invention discloses a man-machine instruction automatic generation external control system and method based on physical isolation perception. The system comprises an external execution body, a display sensing module, an artificial intelligence decision module and an input execution module. The local independent proxy device operates independently of the controlled system, acquires a screen display signal of the controlled system in one direction through an external display acquisition link, generates a control instruction based on acquired interface information, acts on the controlled system through a standard man-machine input interface, and constructs a closed-loop verification mechanism taking the screen display signal as a judgment basis. The information acquisition constraint, the judgment constraint and the execution authenticity constraint are followed, and verifiable confirmation of a control instruction execution result is realized. The system supports multi-mode triggering and external physical equipment extension control, solves the problems of insufficient safety, limited compatibility and poor verification reliability in the prior art, and is suitable for application scenes with high safety requirements.

This invention provides a fast frequency closed-loop control method and system for an alkali metal atomic magnetometer laser, comprising: setting the laser current and laser temperature, calculating and obtaining the laser frequency closed-loop control signal SigX; and controlling the laser frequency based on the offset value of the frequency closed-loop control signal SigX and the correlation function f(I) = φ(I, SigX) between the current value and SigX. X The process involves calculating and obtaining the current adjustment value ΔI0, which is then directly applied to the laser current. The difference between the current adjustment value I1 and the set value I0 is calculated as ΔI1. Based on the correlation function f = φ(f(I), f(T)), the temperature change ΔT1 corresponding to the current change ΔI1 is calculated. This temperature adjustment ΔT1 is then applied to the laser temperature. By adjusting the laser temperature to T1, the laser current value is changed back from the adjustment value I1 to the initial set value I0. This invention addresses the problem in existing technologies where using laser current as a feedback signal for closed-loop control of laser frequency easily affects the laser's performance and consequently its lifespan.

This invention discloses a deep trench isolation structure for a CIS (CMOS Image Sensor), comprising: a deep trench formed by plasma etching of a first surface of a first semiconductor substrate, wherein the inner surface of the deep trench has interface defects generated by plasma etching; a first semiconductor epitaxial layer, a second dielectric layer, and a third conductive material layer formed in the deep trench; and a fourth conductive material layer formed in a portion of the deep trench closest to the peripheral region; the fourth conductive material layer being connected to an external electrode; the external electrode being connected to an external control module, which provides an external voltage to each of the third conductive material layers to modulate the interface states of the inner surface of the deep trench, thereby eliminating the adverse effects of interface defects on the interface states. This invention also discloses a method for manufacturing the deep trench isolation structure for a CIS. This invention can modulate the interface states at the interface between the deep trench isolation structure and the semiconductor substrate, optimizing the interface states and thereby reducing dark current and white pixels.

This disclosure relates to the field of polymer emulsions, specifically to a method for preparing a peelable emulsion. The method includes: reacting glycidyl methacrylate, amino-terminated silicone oil, and sodium flakes at room temperature with stirring in the dark, and filtering to obtain double-bond modified silicone oil; separating a vinyl monomer into a first monomer and a second monomer, and dispersing the double-bond modified silicone oil in the first monomer to obtain a third monomer; preparing a pre-emulsion by ultrasonic emulsification of the second monomer, an emulsifier, and water; adding the pre-emulsion, an aqueous solution of the crosslinking monomer, and an aqueous solution of the first ammonium persulfate to a reaction vessel to form a core-phase emulsion; adding the third monomer and the aqueous solution of the second ammonium persulfate dropwise into the core-phase emulsion to form a core-shell emulsion; naturally cooling the core-shell emulsion, adjusting the pH to 7-8 with ammonia, and filtering to obtain a peelable emulsion. The method for preparing a peelable emulsion provided in this disclosure aims to overcome problems such as weakened peelable coating performance caused by excessive use of release agents.

This invention discloses a novel method for the on-orbit use of a green monocomponent propulsion system, including a method for temperature control of the propulsion system after it enters orbit with the entire satellite, a method for preheating the catalyst bed of the monocomponent thrust chamber before the first start-up, a method for removing functional materials from the monocomponent thrust chamber during the first start-up of the monocomponent thrust chamber, a method for starting the monocomponent thrust chamber during the attitude and orbit control of the propulsion system, and a method for temperature control of the propulsion system during standby. By formulating the above methods, the influence of functional materials on the performance of the monocomponent thrust chamber is effectively eliminated, and the problem of on-orbit use of the novel green monocomponent propulsion system is solved. It has been successfully applied on micro and nano satellites.

The application provides a display panel and a display device. The display panel comprises: a substrate having a display area and a non-display area, the non-display area comprising a binding area located away from the display area; a protective adhesive layer arranged in the non-display area and covering at least the binding area; a polarizer located at least in the display area and extending at least to the edge of the protective adhesive layer; a first barrier structure arranged in the non-display area and located between the protective adhesive layer and the polarizer; and the polarizer covering at least part of the first barrier structure. The display panel can avoid forming a water vapor invasion path at the edge of the polarizer, effectively prevent water vapor penetration, and significantly improve the reliability and service life of the display panel.

The utility model discloses a medical supply packaging structure can reduce the oxygen and moisture content in the packing, including packing box, scavenger and sealed bag, the scavenger is built -in in packing box, and the sealed bag is set up in packing box outside and seals packing box. Packing box includes bottom shell and top cover, and the side edge of bottom shell is swingingly linked with the side edge of top cover, and bottom shell is equipped with at least one and is used for accommodating medical supply's accommodation cavity and at least one storage groove, and the edge of bottom shell is equipped with a plurality of first positioning piece, and the edge of top cover is equipped with a plurality of with first positioning piece one -to -one corresponding second positioning piece, and second positioning piece and first positioning piece interference fit make top cover with bottom shell cover, and in packing box cover state, the accommodation cavity and storage groove between have the breathable passage of intercommunication. Scavenger includes dehumidifier and oxygen scavenger, and dehumidifier and oxygen scavenger are contained in same storage groove or are contained in different storage groove respectively, for through the breathable passage and remove the moisture and oxygen in accommodation cavity.

The invention discloses multi-adsorption-site nitrogen-doped porous carbon, a preparation method and application in iodine adsorption, and the preparation method comprises the following steps: carrying out primary calcination on a zeolite imidazate framework material, mixing with potassium hydroxide, and then carrying out secondary calcination to obtain the multi-adsorption-site nitrogen-doped porous carbon. According to the invention, a zeolite imidazate framework material is used as a precursor, potassium hydroxide is introduced for high-temperature calcination activation treatment, the obtained product inherits a rhombic dodecahedron framework of ZIF-8, a continuous through pore system and a nitrogen-doped carbon material with high pyrrole nitrogen content are formed, and the static adsorption capacity of the nitrogen-doped carbon material to iodine can reach 7.99 g / g.

The application provides a semiconductor device and a manufacturing method thereof. The semiconductor device comprises: a substrate, the substrate comprising an active region; an isolation layer, formed in the substrate of the active region; a gate layer, formed on the substrate of the active region, the gate layer comprising a main gate and an extension gate, the main gate being disconnected with the extension gate, and the projections of the main gate and the extension gate on the substrate being connected through the isolation layer. The application can eliminate the influence of the parasitic capacitance on the performance of the semiconductor device while keeping the original function of the gate layer.

The application discloses a flow visualization monitoring method in a cloud environment, and the method comprises the following steps: obtaining full flow in the cloud environment and time stamps of the flow by mirroring all virtual instance flows in the cloud environment; removing the full flow; classifying the removed full flow according to classification rules; determining the topological relationship of each classified flow by using a visualization algorithm on the five-tuple information and the time stamps of the classified full flow; storing the five-tuple information, the time stamps, the topological relationship of the classified full flow and the corresponding visualization parameters of each classification in a pre-set storage structure; and visualizing the classified full flow according to the topological relationship of each classified flow and the corresponding visualization parameters of each classified flow. The application also discloses a flow visualization monitoring device in a cloud environment. The application can realize the visualization monitoring of the flow in the cloud environment.

The invention belongs to the technical field of oil and gas field development reservoir transformation, and discloses a tracer agent for multilayer fracturing flowback monitoring, a preparation method and application, according to the preparation method, the effectiveness of the tracer agent is evaluated through an experimental means, and it is guaranteed that the effective tracer agent can be used for monitoring a flowback curve of fracturing fluid flowback volume along with time; according to the application method, a tracer agent is used for marking fracturing fluid, and the initial fracturing fluid dosage and the initial tracer agent dosage are recorded; after flowback is started, accumulated flowback volume is recorded at a fixed time interval, the real-time concentration of the tracer agent is measured, and the flowback volume of each section is calculated; according to the return volume of each section and the accumulated return volume of each section, the return curve and the accumulated return rate of each section are calculated, the liquid production contribution rate and the production sequence of each layer section can be accurately obtained, and the liquid production capacity can be calculated in a semi-quantitative mode. Through flow-back liquid sample detection and data analysis, the liquid drainage sequence, the flow-back contribution rate and the like of each layer section can be determined, and data support is provided for subsequent construction.

The application provides a thermosetting viologen electrochromic solution and an electrochromic device. The thermosetting viologen electrochromic solution comprises the following components at the following concentrations: 1.5-4.5 g / mL of a diepoxy functional group molecule, 0.5-0.8 g / mL of an anhydride curing agent, 0.1-0.4 g / mL of a viologen compound, and 0.05-0.3 g / mL of a counter electrode material; the diepoxy functional group molecule is at least one selected from bisphenol f diglycidyl ether, bisphenol a diglycidyl ether and bisphenol s diglycidyl ether. The electrochromic device comprises a solid electrochromic layer formed by curing the thermosetting electrochromic solution. The application optimizes the formula, so that the electrochromic solution can achieve thermal curing while ensuring good electrochromic performance, solves the problems of easy leakage and poor safety of the viologen electrochromic device, and can be thermally cured and formed, avoiding the potential adverse effects of the ultraviolet curing method on the performance of the device.

The utility model relates to wire twisting mould technical field, concretely relates to high -precision very thin tungsten wire cable wire twisting mould structure, including support seat, the top fixed mounting of support seat has the water storage tank, the outside fixed mounting of water storage tank has the cooling mechanism, the top fixed mounting of water storage tank has the cooling plate, the inside installation of cooling plate has multiple groups installation mould cover, the inside fixed connection of multiple groups installation mould cover all has tungsten steel inner mould, the cooling mechanism includes the cooling box fixed mounting in the outside of water storage tank, the back of cooling box is linked with the inside of water storage tank, the inside fixed connection of cooling box has multiple groups radiating fins, the utility model discloses through optimizing the wear resistance, thermal stability and low friction design of tungsten steel inner mould, combines high -efficient circulating cooling system, has realized high -precision very thin tungsten wire cable's high -efficient, low loss, high -precision wire production, has improved product pass rate significantly and has prolonged the mould life.

The application relates to an InAs / AlSb heterojunction type radio frequency field effect transistor device and a preparation method thereof. The device comprises a GaAs substrate, an AlGaSb buffer layer, a p-type GaSb interlayer, a lower barrier layer, an InAs channel layer, an upper barrier layer, an InAlAs hole blocking layer, an InAs cap layer, a source electrode, a drain electrode and a gate electrode. The GaAs substrate, the AlGaSb buffer layer, the p-type GaSb interlayer, the lower barrier layer, the InAs channel layer, the upper barrier layer and the InAlAs hole blocking layer are stacked in sequence. The source electrode and the drain electrode are both located on the InAs cap layer and are spaced apart by a certain distance. The InAs cap layer is provided with a gate slot, the gate slot is located between the source electrode and the drain electrode and on the InAlAs hole blocking layer, and the gate electrode is located in the gate slot. In the radio frequency field effect transistor device, the p-type GaSb interlayer is inserted between the AlGaSb buffer layer and the lower barrier layer, the p-type GaSb interlayer can eliminate some holes caused by the collision ionization effect, inhibit the movement of the holes in the direction of the substrate, thereby improving the direct current characteristics of the device and improving the performance of the device.

The application discloses a repairing method for a bulk SiC f / SiC ceramic matrix composite component, which mainly comprises the steps of machining pretreatment, fiber preform repairing, fiber line reinforcing and CVI deposition repairing. In the machining pretreatment step, the damaged material is cut into dovetail type protrusions, and the thickness of the part is slightly reduced to leave space for fiber line winding. In the fiber preform repairing step, ceramic fibers are woven into a preform with the same thickness as the dovetail type protrusions in the form of 2.5D, an internal groove matched with the preform is processed, and the preform is spliced with the material to be repaired in the form of a mortise and tenon structure. In the fiber line reinforcing step, SiC fiber lines are cross-wound in perpendicular directions to reinforce the mortise and tenon connection part. In the CVI deposition repairing step, the fiber preform and the fiber lines are deposited by means of a CVI process, so that they become SiC f / SiC ceramic matrix composite, which is closely connected with the damaged part by the cooperation of the dovetail type part, the cross-winding of the fiber lines and the mortise and tenon structure, so that the damaged material is repaired.

The present application provides a method for preparing a glycidyl (meth)acrylate compound of Formula 1, the method comprising reacting a (meth)acrylate compound of Formula 2 with a glycidyl compound of Formula 3 to produce the glycidyl (meth)acrylate compound, the reaction being performed in the presence of a catalyst, the catalyst being a Lewis base compound. The method enables extremely excellent target product yield and purity to be achieved at low cost and simple steps, and successfully eliminates defects associated with prior art catalysts during the reaction process. Formula 1

The utility model discloses a transfer car for circuit board production, including bottom plate, and the both ends fixed connection two support columns of bottom plate, and four support columns are rectangular distribution, and the bottom plate includes frame, placing plate and two adjusting grooves, and placing plate slidingly sets up on the frame, and two adjusting grooves are fixedly connected with the both ends of frame respectively, a plurality of longitudinal distribution is adjusted board and a top plate same with its structure above bottom plate, and the top plate is located above a plurality of adjusting board, and the adjusting board and top plate all are slidingly connected with four support columns, lifting assembly, and two lifting assemblies are symmetrically equipped with on every frame top near both ends place, the transfer car in the utility model cooperates through the unique lifting assembly and adjusting assembly, has realized the flexible adjustment of adjusting board and top plate height. The handle of rotating adjusting assembly, worm drives worm wheel to rotate, and then makes screw column group rotate, drives threaded sleeve to move along screw column, and the transmission of connecting rod realizes the lifting of adjusting board and top plate.

This invention discloses a wafer-level packaging method for filters. A positive photoresist dry film is used to form vias and grooves through a double exposure and single development process. This is then bonded to a wafer, with the grooves corresponding to the functional areas of the chip to form cavities. Metal is then deposited into the vias to connect to the chip's wiring for circuit routing. Finally, the package is diced to form a single filter package structure. This invention uses a single-layer positive photoresist dry film for packaging, with the cavities formed within the single-layer dry film. This eliminates the delamination issues of wall and top layers, improving device reliability. It also simplifies the process, shortens the process cycle time, and eliminates the need for multi-layer materials, saving costs.

This invention discloses a data integrity verification and tamper location method for autonomous vehicles, comprising the following steps: S1: Watermark embedding: Obtaining raw LiDAR point cloud data from a LiDAR sensor, and embedding a preset binary watermark sequence into the raw LiDAR point cloud data based on a three-dimensional quantization index modulation method to generate watermarked LiDAR point cloud data; S2: Data transmission: Transmitting the watermarked LiDAR point cloud data to an advanced driver assistance system in the vehicle network; S3: Parallel processing; S4: Tampering determination and location: Based on the comparison results of the integrity verification process, determining whether the LiDAR point cloud data has been tampered with. If it is determined to have been tampered with, the tampered LiDAR point cloud data area is located based on the data point positions where the watermark information does not match. This invention can accurately locate tampering, controllable distortion, avoid decryption delays in encryption methods, meet the real-time requirements of autonomous driving, has broad application prospects, and is conducive to widespread application.

The invention discloses a preparation method of a macroporous magnesium-aluminum composite material, and belongs to the technical field of chemical engineering, and the method comprises the following steps: preparation of magnesium-aluminum sol, preparation of a first solution, preparation of a magnesium-aluminum dry gel film, preparation of a macroporous magnesium-aluminum composite material precursor and preparation of the macroporous magnesium-aluminum composite material. According to the invention, the alumina matrix is subjected to magnesium-aluminum coating modification, the pore structure of the magnesium-aluminum composite material is optimized, the surface acid-base property of the adsorbent material is improved by combining the modification of the organic ligand, and the adsorption selectivity of water vapor is greatly reduced while the structural stability of the material is ensured; the carbon dioxide can be efficiently captured in a high-water-vapor environment (such as air). The invention also discloses the macroporous magnesium-aluminum composite material prepared by the preparation method. Meanwhile, the invention further discloses application of the macroporous magnesium-aluminum composite material in the field of adsorption.

This invention discloses a method for preparing carbon fiber epoxy composite materials that combine high mechanical properties and a low coefficient of thermal expansion. Belonging to the field of composite materials, it addresses the technical challenge of simultaneously improving the mechanical properties and reducing the coefficient of thermal expansion of composite materials using existing carbon fiber processing methods. By non-covalently modifying carbon nanotubes with ionic liquids, unlike traditional covalent modification methods, the intrinsic strength of carbon nanotubes is preserved, constructing a multi-mechanism synergistic interface reinforcement system. This specifically addresses the key problems of traditional sizing agents having a single interfacial effect and hindered stress transmission. In this invention, flexible polyimide acts as a bridge at the interface, while rigid carbon nanotubes construct an effective armor on the fiber surface. The two form a rigid-flexible composite structure at the interface, which effectively alleviates interfacial stress concentration, significantly improves interfacial stress transmission efficiency, achieves uniform dispersion of external loads, and ultimately improves the mechanical properties of the carbon fiber epoxy composite material.

The application specifically relates to the technical field of household appliances, and particularly relates to a sweeper, which comprises a base provided with a rolling brush cavity and a battery cavity on a side close to the ground, the rolling brush cavity and the battery cavity are adjacently arranged along a first direction; a rolling brush mechanism is movably installed in the rolling brush cavity; an installation cavity is arranged on a side of the base far from the ground and between the rolling brush cavity and the battery cavity; the installation cavity is in communication with the rolling brush cavity; a driving mechanism is arranged in the installation cavity; a driving end of the driving mechanism extends into the rolling brush cavity and is connected with the rolling brush mechanism; under the driving effect of the driving mechanism, the rolling brush mechanism moves along a third direction. The driving mechanism is directly arranged in the installation cavity, the space of the base is fully utilized, the space utilization rate is improved, and the overall volume of the transmission mechanism can be reduced. The volume of the driving motor and the transmission mechanism is large, the compact layout of the sweeper in the longitudinal height can be reduced, and the thickness of the sweeper can be controlled within a certain range.

The application relates to a fuel cell anode water distributor and a fuel cell system, wherein the fuel cell anode water distributor comprises an upper shell and a lower shell, a plurality of water baffles are detachably connected to the upper shell and the lower shell respectively, the water baffles are arranged in an alternating manner at different heights between the upper shell and the lower shell, a water baffle is arranged between the upper shell and the lower shell, and a water leakage hole is arranged on the water baffle. The water distribution performance can be adjusted according to the power demand of the fuel cell system, the water distributor is suitable for fuel cell systems of various power levels, and the reliability, water distribution efficiency and adaptability of the system are improved.

The embodiment of the application discloses a network traffic identification method, device and electronic equipment, the method comprises the following steps: capturing target traffic data passing through a communication network edge node; extracting a QUIC handshake connection feature based on a QUIC protocol and an application interaction behavior feature according to the target traffic data; fusing the QUIC handshake connection feature and the application interaction behavior feature to obtain a target fusion feature; and identifying a service scene type corresponding to the target traffic data according to the target fusion feature. The embodiment of the application can effectively improve the extraction and identification effect of the QUIC related features of the network traffic data, thereby improving the identification ability of the communication network for the network traffic service scene, and being beneficial to guaranteeing the QoS of the communication network while strengthening the security management and control ability.

The utility model relates to the technical field of electromagnetic valves for water, and discloses a stable electromagnetic valve magnetic circuit assembly which comprises an electromagnetic coil structure, an upper fixed iron core and a movable iron core assembly. The movable iron core assembly comprises a movable iron core, a fixed chock plug, a movable colloidal particle and a reset spring. The movable iron core is movably mounted in the electromagnetic coil structure; a built-in cavity penetrating through the upper and lower ends of the movable iron core is formed in the movable iron core; the fixed chock plug is embedded and plugged on the opening at the upper end of the built-in cavity in a matched manner; the movable colloidal particle can be movably embedded into the built-in cavity and can move in the vertical direction of the built-in cavity; the reset spring is embedded in the built-in cavity, and the upper end and the lower end of the reset spring are connected with the fixed plug and the movable rubber particle correspondingly. According to the stable magnetic circuit assembly of the electromagnetic valve, the reset spring is completely packaged in the built-in cavity, the fixed chock plug is adopted for pressing the reset spring, friction loss caused by the fact that the reset spring is exposed is prevented, the influence of the external environment on the performance of the reset spring is avoided, and therefore the overall stability of the electromagnetic valve is improved, and the service life of the electromagnetic valve is prolonged.

The invention relates to a negative electrode active material, a negative electrode and preparation methods and applications of the negative electrode active material and the negative electrode, the negative electrode active material contains first silicon-containing particles and first metal nanowires, the first silicon-containing particles and the first metal nanowires are connected through an alloy, the first metal nanowires comprise metal M, and the alloy phase comprises an M-Si alloy. The lithium ion battery prepared from the negative electrode plate containing the negative electrode active material disclosed by the invention can obtain a relatively low expansion rate, a relatively high capacity retention ratio and a relatively high first effect.

The utility model relates to the technical field of cracked rock material production, and discloses an injection type directional gas energy expansion cracked rock material production device which comprises a gas energy storage mechanism, the gas energy storage mechanism comprises a liquid storage tank, a temperature adjusting mechanism is arranged on the outer side of the liquid storage tank, and a high-pressure low-temperature filling device is fixedly installed at a discharging port in one end of the liquid storage tank. An expansion rock cracking mechanism is arranged at a filling opening in one end of the high-pressure low-temperature filling equipment. The device is provided with the temperature adjusting mechanism, the liquid storage tank can be preheated and the gasification process of liquid carbon dioxide can be accelerated through the arc-shaped heater in a low-temperature environment, and the temperature of the liquid storage tank can be reduced through the cooler in a high-temperature environment, namely, the heat conduction sleeve is installed and provided with the cooling fins, and air can be guided through the air guide fan; the auxiliary cooling fins are used for heat dissipation, it can be guaranteed that the liquid storage tank of the device works within the proper temperature range, and the influence of temperature on the performance of the liquid storage tank of the device is reduced.

The application discloses a method for constructing an organic electrochemical transistor ion sensing device based on a printing technology. The method comprises the following steps: taking a PI film as a flexible substrate of an organic electrochemical transistor, using a silk screen to make an electrode layer on the substrate to obtain the organic electrochemical transistor, then modifying a polyelectrolyte layer on a channel of the organic electrochemical transistor to obtain the polyelectrolyte layer, finally, modifying an ion-selective membrane on the channel of the organic electrochemical transistor with the polyelectrolyte layer to obtain the final organic electrochemical transistor ion sensing device, and exploring the feasibility of the device for ion sensing through a series of electrical characterization methods. The method combines the organic electrochemical transistor technology and the printing technology, prepares the organic electrochemical transistor flexible ion sensing device based on a flexible material substrate, is used for ion content detection, greatly reduces production cost, improves production efficiency, and meets the requirements of device and biological body adaptation and the like.

The invention provides a modified alumina carrier, a metal catalyst, a preparation method and application. The modified alumina carrier is prepared by taking industrial-grade formed alumina in a gamma-Al2O3 crystal form as a base material and carrying out in-situ modification treatment on carbon-containing gaseous micromolecules; the surface of the modified alumina carrier has reconstructed active sites and an electron-rich microcell environment, the reconstructed active sites are formed after an Al-O-Al bridge bond on the surface of a base material is broken, and the binding energy of Al < 2p > in an X-ray photoelectron spectroscopy of the electron-rich microcell environment is reduced by 0.2-0.35 eV compared with that of unmodified gamma-Al2O3. The preparation method provided by the invention is simple and convenient to operate under mild conditions, low in cost and suitable for industrial large-scale production requirements.

The application discloses a battery connecting piece welding positioning device and belongs to the technical field of battery connecting piece welding. The device comprises a body assembly, a clamping positioning mechanism and a driving mechanism. The body assembly comprises an operation table. A welding device is installed on the operation table. An air cooling assembly is installed at the position of a welding head of the welding device. The clamping positioning mechanism comprises a pair of bionic clamping jaws. Each of the bionic clamping jaws comprises a bionic contact layer, an intermediate layer and an inner layer. The bionic contact layer is provided with a heat absorption assembly. The inner layer is provided with a heat dissipation assembly. When the battery connecting piece is welded, the heat is absorbed by the heat absorption assembly and then transferred to the heat dissipation assembly for treatment. The welding device is provided with an air cooling assembly. Through the synergistic effect of the air cooling assembly and the heat absorption assembly, the temperature during the welding of the battery connecting piece is effectively reduced, the safety during the welding is ensured, and the performance of the battery connecting piece will not be affected by the welding.