152results about How to "Reduce current density" patented technology

The invention discloses a preparation method of a lithium metal negative electrode with an ultrathin lithium-loving high-entropy alloy interface layer, and belongs to the technical field of lithium metal batteries. The preparation method comprises the following steps: dispersing a carbon nanotube coated high-entropy alloy composite material, lithium tin alloy powder and a hydrophobic polymer in a non-organic solvent, coating a copper foil with the mixture, and drying the copper foil to obtain an ultrathin, pre-lithiated and lithium-loving negative electrode of a high-entropy alloy interface layer. According to the preparation method of the lithium metal negative electrode with the ultrathin lithium-loving high-entropy alloy interface layer, catalytic elements in the high-entropy alloy composite material coated with the carbon nanotubes are used for inducing the carbon nanotubes to form a 3D conductive network framework, so that the current density of the electrode can be effectively reduced, lithium metal deposition can be accommodated, and the lithium metal negative electrode has a good application prospect. And meanwhile, release of lithium ions in the lithium tin alloy can be activated for lithium pre-supplement, so that generation of lithium dendrites and dead lithium is inhibited, the volume change of a lithium metal negative electrode in the charge-discharge cycle process is slowed down, and the cycle stability of the battery is improved.

The invention provides a rapid activation method of a proton exchange membrane fuel cell, and belongs to the technical field of fuel cells. The rapid activation method comprises a hydrogen pump activation stage and a variable load activation stage. In the hydrogen pump activation process, a current with the current density of 50-200mA / cm < 2 > is applied to the fuel cell in a constant current mode for 5-30 minutes, so that the utilization rate of an electrode catalyst is improved, and the generation of surface oxides of a cathode catalyst can be removed or avoided; in the variable load activation process, low current density and high current density are alternately changed, the ratio of the high current density to the rated current density of the battery is 0.8-1.2, and the ratio of the low current density to the high current density is less than or equal to 0.2, so that establishment of water, gas, electron and proton channels in the membrane electrode is facilitated. By adopting the activation method provided by the invention, the activation time of the proton exchange membrane fuel cell is effectively shortened, the hydrogen consumption is reduced, and the manufacturing cost of the fuel cell is reduced.

The invention relates to the technical field of chip packaging electromagnetic field analysis, in particular to a simulation system and method based on chip packaging electromagnetic field analysis, and the method comprises the steps: 1, obtaining chip packaging parameters from a database, and constructing an electromagnetic field model of a chip; the chip packaging parameters comprise packaging structure parameters and packaging material parameters; 2, analyzing the electromagnetic field model of the chip, and obtaining distribution characteristics of an electric field and a magnetic field in the chip and current distribution characteristics through an analysis result; 3, learning the relation between the magnetic field distribution characteristics and the current distribution characteristics through the prediction model, and predicting the current distribution under different magnetic field distribution conditions; step 4, adjusting a chip packaging parameter based on a prediction result, optimizing the packaging parameter through a genetic algorithm, and searching an optimal packaging parameter; and step 5, carrying out simulation verification on the optimized chip packaging parameters.

The invention provides an iron catalytic material as well as a preparation method and application thereof. The method comprises the following steps: carrying out in-situ etching on an iron substrate by adopting an iron salt solution with the concentration of 20-80 mM so as to form an oxygen-containing iron layer containing gamma-FeOOH on the surface of the iron substrate, thereby obtaining the gamma-FeOOH / Fe iron catalytic material, or after the gamma-FeOOH / Fe iron catalytic material is obtained, the gamma-FeOOH / Fe iron catalytic material is calcined at the temperature of 300-500 DEG C in the inert atmosphere, so that gamma-FeOOH in the gamma-FeOOH / Fe iron catalytic material is converted into alpha-Fe2O3, an oxygen-containing iron layer containing alpha-Fe2O3 is formed on the iron base material, and the alpha-Fe2O3 / Fe iron catalytic material is obtained. The gamma-FeOOH / Fe and the alpha-Fe2O3 / Fe can serve as cathode materials to be used for electrochemically activating persulfate to degrade pollutants, metal active sites are effectively fixed and protected through the oxygen-containing iron layer on the surface, leaching of iron ions on a cathode is reduced, and therefore the service life of the cathode is prolonged.

The invention discloses a formation method for prolonging the service life of a lead-acid storage battery, and belongs to the technical field of lead-acid storage battery manufacturing. The method comprises the following steps: (1) acid injection: injecting electrolyte into the lead-acid storage battery, and standing the lead-acid storage battery; (2) preliminary formation: charging; charging is performed; (3) supplementing an electrolyte: injecting the electrolyte into the lead-acid storage battery; (4) final formation: discharging; charging is performed; charging is performed; discharging is conducted; charging is performed; charging is performed; and charging. By accurately controlling the acid injection amount and adjusting the electrolyte amount in stages, the storage battery is in an environment beneficial to generation of alpha-PbO2 in the formation process, and the service life of the storage battery is prolonged. The addition of energy cost for paste mixing and curing and the addition of other additives are not needed, and the content of alpha-PbO2 is increased. And a conventional industrial charging mode is adopted, so that the current density is not high, sufficient formation of the lead paste is ensured, the performance stability and reliability of the lead-acid storage battery are improved, and the lead-acid storage battery has better performance in various application scenes.

The invention discloses a self-aligned embedded gate metal IGBT (Insulated Gate Bipolar Translator) and a manufacturing method. The self-aligned embedded gate metal IGBT comprises a semiconductor layer arranged on the front surface of a substrate, a body region and a drift region which are arranged in the semiconductor layer, and a source region arranged in the body region, the pair of first side walls are arranged on the surface of the semiconductor layer above the source region; the trench gate is arranged in the semiconductor layer between the pair of first side walls and penetrates through the source region; the gate metal is embedded between the pair of first side walls and is connected with the trench gate; the source region contact groove is formed in the semiconductor layer on one side of the trench gate; the source region contact metal is filled in the source region contact groove and is connected with the source region; the gate metal and the source region contact metal are respectively connected with the metal interconnection layer through conductive contact holes; the collector region layer and the buffer region layer are arranged below the back surface of the substrate, and the collector layer is arranged on the back surface of the substrate. The invention can accelerate the conduction speed, increase the switching frequency, reduce the number of photomasks, eliminate the overlay error, reduce the device area, reduce the short-circuit resistance and improve the device performance.

The utility model relates to a current collector, a positive plate and a lithium ion battery. The current collector comprises a main body area and an open pore area connected to the main body area, the open pore area is close to the edge position of the current collector, and open pores are distributed in the open pore area. The opening area is arranged at the edge of the current collector, and the openings are distributed in the opening area, so that the resistivity of the opening area is increased and the current density at the edge of the positive plate is reduced due to the existence of the openings, thereby reducing the deposition speed of lithium at the edge of the negative plate and enabling the edge of the negative active material layer of the negative plate not to have a lithium precipitation phenomenon easily; and the lithium precipitation risk is reduced.

The invention provides a solder strip, a photovoltaic module and a photovoltaic system, the solder strip comprises a light receiving section and a backlight section, and the light receiving section is used for being fixed on a light receiving surface of a first battery piece; the backlight section is used for being fixed to the backlight face of the second battery piece and comprises a plurality of sub welding strips. One backlight section corresponds to one light receiving section, and the plurality of sub welding strips in one backlight section are connected to one end of the corresponding light receiving section. In a battery string formed by connecting the solder strips in series, the number of light receiving sections of the battery string is relatively small, front shading of the battery piece can be reduced, the front light incidence rate can be improved, meanwhile, the number of the sub-solder strips on the back face of the battery piece is relatively large, current shared by each sub-solder strip is reduced, the current density is reduced, and therefore resistance loss is reduced, and the service life of the battery piece is prolonged. And the output power of the battery string is improved. Besides, the less the current shared by each sub-welding strip is, the less the generated heat is, the heat accumulation and the working temperature of the battery piece are reduced, and the service life of the battery piece is prolonged.

The invention relates to the field of high-speed steel heat treatment, and provides high-wear-resistance high-speed steel and a strengthening method thereof. The preparation method of the high-wear-resistance high-speed steel comprises the following steps: firstly carrying out pulse current austenitizing treatment on commercial high-speed steel, then quenching, and then carrying out pulse current multi-gradient tempering treatment. According to the method, the long-time and high-temperature heat treatment process is shortened, the cost and the energy consumption are reduced, the process is simplified, grains and carbides are refined at the same time through the cooperative regulation effect of the process and parameters, and the obtained high-speed steel is superior to the high-speed steel obtained through high-temperature and long-time treatment: austenitizing, quenching and tempering in the prior art in hardness and wear resistance, and has the good application prospect. The method is suitable for industrial production.

This invention relates to the field of perovskite solar cell technology, and discloses a method for preparing a low-dimensional perovskite thin film and its solar cell. The method for preparing the low-dimensional perovskite thin film is as follows: Step 1, weighing p-fluorophenylethylamine iodine, methyl iodide, lead iodide, formamidine iodide, methyl ammonium chloride, and lead chloride, and dispersing them in a mixed solution composed of dimethylformamide and dimethyl sulfoxide to obtain a low-dimensional perovskite precursor solution; Step 2, dropping the low-dimensional perovskite precursor solution onto a substrate, rapidly spin-coating for 10-20 seconds, and then subjecting it to reverse-order cooling annealing to obtain a low-dimensional perovskite thin film. This invention rapidly forms a low-dimensional perovskite wet film through high-speed spin-coating, followed by reverse-order cooling annealing, which not only enables the preparation of low-dimensional perovskite thin films with vertically grown multiphase structures, but also has good repeatability and reduces the manufacturing cost of battery devices. The reverse-order cooling annealing process described in this invention is simple and suitable for industrial production.

The utility model relates to the technical field of breast pumps, in particular to a heating breast pump which comprises a cover body and a main machine connected with the cover body, the cover body is provided with a heating assembly used for heating and a cover body connector connected with the heating assembly, and the main machine is provided with a main machine connector communicated with the cover body connector. And the cover body connector and / or the host connector are / is provided with an annular conducting end for increasing the conducting contact area. According to the utility model, the conductive contact area is increased by arranging the annular conductive connection end, so that a wider and stable path can be provided when current passes through, the current density of the current at a contact point can be effectively reduced, the situation that the contact point is broken down due to overlarge local current is avoided, the current can continuously and stably pass through the connector, and the service life of the connector is prolonged. Normal power-on work of the heating assembly is maintained, and the problem of heating function failure caused by poor contact is reduced.

The invention belongs to the technical field of electrocatalytic hydrolysis, and particularly relates to a preparation method and application of high-activity NiCe (OH) n / NF. A noble metal catalyst is not used, so that the use cost is greatly reduced. The positive electrode obtains glucaric acid in an electrooxidation mode, meanwhile, the active center NiOOH can stably exist in an alkaline environment in a circulation mode, and the negative electrode produces hydrogen. And due to the redox cycle between Ni (OH) 2 and NiOOH, the overpotential can be effectively reduced, and the electric energy loss is reduced. And due to the synergistic effect of a small amount of cerium, the system can realize high-efficiency hydrogen production while obtaining the glucaric acid with high additional value. According to the method, glucose is catalyzed by using a circulating system to obtain glucaric acid, meanwhile, the anode glucose yield reaches 70%, and the cathode hydrogen evolution efficiency is close to 100%. Compared with a traditional water electrolysis hydrogen production process, the glucose oxidation assisted low-potential couple circulation coupling hydrogen production method conforms to'green chemistry 'and is lower in cost, and harsh reaction conditions and complex separation steps are avoided.

This invention relates to the field of hydrogen production technology through water electrolysis, and provides a low-energy-consumption constant-temperature water supply system for ultrapure water electrolysis hydrogen production. The system includes a PEM electrolyzer, an ultrapure water supply unit, a circulating water supply loop, a local purification and bypass unit, a data acquisition module, a data analysis module, an energy consumption determination module, and an energy consumption control module. The data analysis module determines the heat load matching parameters based on current, voltage, circulating flow rate, and inlet and outlet water temperatures, and determines the water quality characterization state and flow characterization state. The energy consumption determination module first determines whether the temperature rise represents the actual heat load. Under non-actual heat load conditions, the energy consumption control module determines the cause of abnormal energy consumption based on water quality and flow state, and performs pump reduction and cooling, short-term flow correction, local purification, or current density reduction control to reduce the additional energy consumption of the constant-temperature water supply.

The invention provides a titanium bipolar plate conductive corrosion-resistant coating and a preparation method thereof. The titanium bipolar plate conductive corrosion-resistant coating comprises a conductive layer and an oxide layer, the oxidation layer covers the titanium-based bottom layer, and the conductive layer covers the oxidation layer; wherein the material of the conductive layer is In / Sn-TiOx, and the range of x is 1.3 to 2.2; and the oxide layer is made of TiO2. The composite coating has excellent conductivity and corrosion resistance, the conductivity of the oxidation layer can be enhanced by doping In and Sn, and good corrosion resistance can be kept under the high-potential, acidic and oxidation conditions of the anode of the proton exchange membrane electrolytic cell, so that the conductivity and corrosion resistance of the titanium plate in a severe environment are improved. The coating is simple to prepare and low in cost, and can be widely applied to the field of proton exchange membrane electrolyzed water.

The embodiment of the utility model relates to the technical field of motor control, in particular to a three-phase conducting ring device, a motor stator and a motor. The first conducting ring is provided with a first power supply input connecting piece connected with an input power supply and two first wire connecting pieces; the second conducting ring is provided with a second power supply input connecting piece connected with the input power supply and two second wire connecting pieces; the third conducting ring is provided with a third power supply input connecting piece connected with the input power supply and two third wire connecting pieces; the first insulating sheet is stacked between the first conducting ring and the second conducting ring; and the second insulating sheet is laminated between the second conductive ring and the third conductive ring. The three-phase conducting ring device is adopted to increase the rated current output by the motor, so that the output power of the motor is increased.

The utility model discloses a multi-channel type anode plate conductive copper bar structure of an electrolytic copper foil anode tank, which comprises a tank body and an anode plate assembly laid at the bottom of the tank body, a cathode roll shaft is transversely arranged on the upper side of the tank body, at least two sections of conductive areas are arranged on the outer side of the anode plate assembly along the axial direction of the cathode roll shaft, and the conductive areas are arranged on the outer side of the anode plate assembly. At least one group of conductive copper bar components is mounted in each conductive area, a plurality of anode power supply interfaces are dispersedly arranged on the conductive copper bar components, the conductive copper bar components and the plurality of anode power supply interfaces form a multi-channel power supply structure, current distribution is balanced by utilizing multi-channel power supply, the electrolytic efficiency is improved, and the electrolytic efficiency is improved. And the problem of non-uniform current distribution on the surface of the anode plate in the prior art is solved.

The application discloses the technical field of electroplating wastewater treatment high-value metal recovery system for electroplating wastewater, including electrolytic cell and electrolytic mechanism, electrolytic cell is connected with infusion tube, infusion tube is connected with electronic flowmeter, electrolytic cell top is detachably connected with cover body, cover body is provided with observation ring groove, cover body is fixedly connected with camera unit; The inside lower side of the electrolytic cell is provided with a sedimentation plate and a stirring unit, the sedimentation plate is in sliding fit with the inner side wall of the electrolytic cell, the bottom of the electrolytic cell is fixedly connected with a first weighing sensor, and the detection end of the first weighing sensor is in abutment with the bottom of the sedimentation plate; The electrolytic mechanism includes a controller, a driving unit, an adjusting unit and an electrolytic unit. The application reduces the generation of concentration polarization and activation polarization phenomenon in the process of electroplating wastewater metal treatment and recovery, recovers the wastewater metal in an efficient state, estimates the treatment and recovery effect of the wastewater metal, and improves the qualified rate of wastewater metal treatment and recovery.

The present invention relates to the technical field of preparation of pn junction photovoltaic cells with semiconductor crystalline silicon material as substrate, and discloses a silicon photovoltaic cell with freewheeling protection function and its manufacturing method and application, wherein the device comprises an in-situ integrated photoelectric conversion unit pn junction and a Schottky diode MS junction, wherein the Schottky diode MS junction and the photoelectric conversion unit pn junction are in a parallel state with reverse polarity; a third silicon region is arranged between the Schottky diode MS junction and the first silicon region. The device and method provided by the present invention can realize the in-situ freewheeling hot spot protection of a monolithic silicon photovoltaic cell, without the need for external connection, with simplified design and high reliability; the freewheeling diode has a low conduction voltage drop, a large chip perimeter area ratio, a low current density, a small on-resistance, and good heat dissipation conditions; the loss of photogenerated non-equilibrium minority carriers is reduced, which is conducive to maintaining the photoelectric conversion efficiency of the silicon photovoltaic cell.

The embodiment of the invention discloses a wireless charging earphone box, a metal rotating shaft on wireless charging electronic equipment and a method for reducing heating of the metal rotating shaft. The wireless charging earphone box is provided with an earphone box main body, an earphone box upper cover and a metal rotating shaft, an induction coil for wirelessly charging a battery of the earphone box is arranged in the earphone box main body, the earphone box upper cover is rotatably connected with the earphone box main body through the metal rotating shaft, and the metal rotating shaft comprises an upper rotating shaft assembly and a lower rotating shaft assembly. The upper rotating shaft assembly is clamped with the earphone box upper cover, the lower rotating shaft assembly is clamped with the earphone box main body, and the upper rotating shaft assembly and / or the lower rotating shaft assembly of the metal rotating shaft are / is provided with a hollow structure. Preferably, the edge of the upper rotating shaft assembly and / or the lower rotating shaft assembly of the metal rotating shaft is provided with a slotting structure. Different from the existing technical scheme, the embodiment of the invention can solve the problem of heating of the metal rotating shaft during wireless charging only by optimizing the structural design of the metal rotating shaft.

The invention discloses a cathode protection method for an aluminum electrolysis cell, which solves the problem of serious non-uniform abrasion of a cathode caused by physical abrasion and electrochemical corrosion of the aluminum electrolysis cell, and adopts the technical scheme of implementing integral protection on a cathode abrasion area. The cathode protection frame is arranged above the cathode abrasion area, the filling material is arranged in the cathode protection frame, the flow speed of molten aluminum in the cathode abrasion area is reduced by means of the flow choking characteristic of the cathode protection frame, a material sediment accumulation protection layer is formed above the cathode abrasion area, a cathode is protected against erosion abrasion of the molten aluminum, and the service life of the cathode is prolonged. And the current density, the temperature and the aluminum carbide generation speed of a cathode abrasion area are reduced, the cathode abrasion deepening process is delayed, and the purposes of prolonging the safe operation life of the electrolytic cell and reducing the solid waste discharge amount are achieved.

The invention provides a method for reducing brittle cracks of liquid metal during welding, which comprises the following steps of: 1, selecting a GPa-grade galvanized high-strength steel plate, cleaning a to-be-welded surface with acetone or alcohol, removing impurities, and processing the to-be-welded surface into a spot welding sample; 2, selecting a spherical electrode; thirdly, welding is conducted through a multi-section type spot welding technology; and 4, after welding is finished, the LME crack density and the maximum crack depth of the sample are detected. According to the method, stress concentration in the spot welding process can be reduced, the number and depth of LME cracks are reduced, and the shearing performance of a spot-welded joint is improved.

The utility model provides a light emitting diode, comprising a substrate, an epitaxial layer, a first electrode and a second electrode, the epitaxial layer is located on a first surface of the substrate and comprises a first semiconductor layer, a light emitting layer and a second semiconductor layer which are sequentially arranged from top to bottom, the first electrode is electrically connected with the second semiconductor layer, and the second electrode is electrically connected with the light emitting layer. The second electrode is electrically connected with the first semiconductor layer. In the utility model, the epitaxial layer comprises the first part and the at least one second part, and the second part is arranged at the periphery of the first part, so that the area of the epitaxial layer can be increased on the basis of ensuring that enough electrodes can be arranged in other areas except the epitaxial layer; the brightness of the light-emitting diode is increased, the current density of the light-emitting diode can be reduced so as to relieve the problem that the light-emitting efficiency is reduced, and the working performance of the light-emitting diode under the condition of ultra-large current density is remarkably improved.

The invention relates to the technical field of fused salt energy storage, and provides an electrode type fused salt heating device, which comprises a first fused salt pond, a second fused salt pond and a heating device, the second molten salt pond is used for storing the heated molten salt; the fused salt heating pipe is connected between the first fused salt pond and the second fused salt pond, and the fused salt heating pipe is connected with the heating electrode; the third molten salt pond is used for mixing the cold salt and the heated molten salt to form molten salt to be heated; the first conveying pipe is communicated with the third molten salt pond and is used for conveying cold salt into the third molten salt pond; the second conveying pipe is communicated with the second molten salt pond and the third molten salt pond and is used for conveying the heated molten salt into the third molten salt pond; and the third conveying pipe is communicated with the first molten salt pond and the third molten salt pond and is used for conveying the molten salt to be heated to the first molten salt pond. According to the technical scheme, the problems of local overheating, fused salt overtemperature decomposition and high electrode corrosion rate in related technologies can be effectively solved.

The utility model provides a light emitting diode, comprising a substrate, an epitaxial layer, a first electrode and a second electrode, the epitaxial layer is located on a first surface of the substrate and comprises a first semiconductor layer, a light emitting layer and a second semiconductor layer which are sequentially arranged from top to bottom, the first electrode is electrically connected with the second semiconductor layer, and the second electrode is electrically connected with the light emitting layer. The second electrode is electrically connected with the first semiconductor layer. The epitaxial layer comprises a first part, and the appearance of the first part is a regular n-polygon, so that the area of the epitaxial layer can be increased and the brightness can be improved on the basis of ensuring that an electrode which is large enough can be arranged in other regions except the epitaxial layer, and the current density of the light-emitting diode can be reduced so as to relieve the problem that the light-emitting efficiency is reduced; the working performance of the light-emitting diode under the condition of ultra-large current density is obviously improved; moreover, n is larger than or equal to 5, the first part is closer to a circular appearance, regular and symmetrical light shapes can be obtained, and application in special illumination fields such as mobile phone flash lamps and glare flashlights is met.

The invention belongs to the technical field of metallurgy, and relates to a conductive loop regulation and control device and method for electroslag fusion welding, and the device is characterized in that combined crystallizers are arranged on the side surface and the bottom of a fusion welding part; the plate-type consumable electrode is arranged between the two welding parts, and the bottom of the plate-type consumable electrode is immersed in the slag pool by a preset depth; the power supply is connected with the plate-type electrode and the conductive disc; the top / side conductive disc is fixedly pressed on the top / side of the welding part; the top / side part conductive loop switch is arranged between the industrial alternating current power supply and the top / side part conductive disc; in the electroslag fusion welding process, the current density and Joule heat in a slag bath and at the lower part of a fusion welding area are reduced by controlling the on-off of a conductive loop. The method has the beneficial effects that Joule heat in the slag bath is concentrated near the plate type consumable electrode, the melting rate of the inner side of a fusion welding part is reduced, then the horizontal width of the slag bath is reduced, the depth of the slag bath is kept, the total volume of a fusion welding area is reduced, stress distribution in the solidification process is more uniform, and element segregation is relieved.

The invention provides a vacuum arc-extinguishing chamber which comprises an insulating shell, two conducting rods, a moving contact assembly and a static contact assembly, the two conducting rods, the moving contact assembly and the static contact assembly are arranged in the insulating shell, the two conducting rods are coaxial and oppositely arranged, and the moving contact assembly and the static contact assembly are assembled on the two conducting rods respectively; each of the moving contact assembly and the static contact assembly comprises a horseshoe-shaped iron core and a contact, and the horseshoe-shaped iron core is provided with an unclosed opening side; the contact is provided with an eddy current notch, and the eddy current notch is located in the range of the opening side of the horseshoe-shaped iron core. The generation of weak eddy current can be reduced, and the effect of reducing temperature rise is achieved; and a horseshoe-shaped iron core can be matched to reinforce the generation of a longitudinal magnetic field, so that the effect of preventing the surface of the contact from being excessively ablated due to aggregation-type electric arcs formed by electric arc aggregation is further enhanced.

This disclosure provides a display processing method, apparatus, and display device, belonging to the field of display technology. The display processing apparatus is applied to a display device, the display area of ​​which includes color sub-pixels and white sub-pixels. The apparatus includes: an acquisition module, configured to, when the display device is in video playback mode, acquire a first value of at least one first parameter of a preset area of ​​the display area, the first parameter corresponding to a driving transistor of a pixel driving circuit of the preset area, the value of the first parameter being proportional to the threshold voltage of the corresponding driving transistor; after a first preset time period, acquire a second value of each first parameter; a determination module, configured to determine a target area based on the difference between the second value and the first value, wherein at least a portion of the first parameters of the target area have a difference greater than a first preset threshold; and a processing module, configured to reduce the brightness of the color sub-pixels of the target area. The technical solution of this disclosure can eliminate image retention in display devices.

This utility model relates to the field of lithium battery technology, and proposes a soldering structure and a cylindrical lithium-ion battery. The soldering structure includes multiple parallel and spaced solder lines, and the solder lines are wavy in shape. The width W1 of the soldering structure is 1.6-3.4 mm; the minimum distance W10 between two adjacent solder lines is 0.6-1.1 mm. By controlling the reasonable size of the soldering, problems such as welding explosions and discoloration of solder lines caused by heat concentration due to excessively small soldering can be avoided. At the same time, excessively large soldering can prevent the increase in laser travel, the reduction in welding efficiency and production capacity, and the decrease in welding reliability caused by the expansion of the solder line area, thereby effectively improving welding quality and efficiency.

The utility model belongs to the field of smelting, and particularly relates to a six-electrode ferroalloy submerged arc furnace which comprises a first electrode group, a second electrode group, a first transformer group and a second transformer group, the first electrode group comprises three first electrodes which are arranged in a triangular shape, the first transformer group comprises three first transformers, and every two first electrodes are connected through one first transformer; the second electrode group comprises three triangular second electrodes, the second transformer group comprises three second transformers, and every two second electrodes are connected through one second transformer; the first electrodes and the second electrodes are uniformly arranged at intervals around the same axis, and through the arrangement of the six electrodes, the diameters of the electrodes can be effectively reduced, and heating points are increased, so that a better heating effect is obtained.

The invention relates to an electroplating post-treatment method for a cold-rolled electroplated tin steel plate, and belongs to the technical field of post-treatment of electroplated surfaces. After tin electroplating is completed, the steps of fluxing, soft melting and four-pass passivation are carried out, specific technological parameters of fluxing, soft melting and four-pass passivation are controlled, and finally compact and multi-component film layers of metal chromium, a chromium sesquioxide passivation film, a chromium hydroxide passivation film and an oxidation film are obtained on the electroplated surface. And the adhesive force of a film layer after the cold-rolled electroplated tin steel plate is electroplated during subsequent coating can be obviously improved.