201results about How to "Reduce temperature rise" patented technology

The invention discloses a bus duct structure and an assembly method thereof, and the bus duct structure comprises a housing which is provided with at least one installation groove. The insulating layer is attached to and covers the inner surface of the mounting groove; the insulating layer is arranged in the mounting groove, the groove opening of the mounting groove can allow the connecting row to enter or exit from the mounting groove along the depth direction of the mounting groove, the connecting row is embedded in the mounting groove through the groove opening of the mounting groove, and the connecting row is in contact with the insulating layer in an attached manner. According to the bus duct structure and the assembly method thereof provided by the invention, the assembly steps can be effectively simplified, and the temperature rise can be reduced.

The invention relates to an epoxy resin pouring type transformer with built-in microcirculation cooling channels and a heat dissipation method of the epoxy resin pouring type transformer, and belongs to the technical field of power transformers. The epoxy resin pouring type transformer comprises an iron core, a low-voltage winding, a high-voltage winding and a heat dissipation shell, the low-voltage winding and the high-voltage winding are completely impregnated and wrapped by an epoxy resin composite material through a vacuum pouring process, an integrated epoxy resin pouring body is formed after curing, and a three-dimensional communicated bionic microcirculation cooling channel network is arranged in the epoxy resin pouring body; the heat dissipation shell is in close contact with the outer surface of the epoxy resin pouring body through the high-heat-conductivity insulating medium. According to the invention, the heat dissipation efficiency can be remarkably improved, and a cooling medium (air) is directly guided to a microscopic area around the winding conductor through a three-dimensional communicated and tree-shaped fractal bionic microcirculation cooling channel network, so that the effective heat exchange area and the heat exchange strength are greatly increased, and internal heat can be accurately and efficiently taken away.

The utility model relates to the technical field of laser application, in particular to a laser frequency stabilization device based on an etalon frequency measurement technology, which comprises a laser emission unit, a frequency detection unit, a frequency stabilization laser output end and a master control adjusting unit, the frequency detection unit comprises an optical splitter, an optical attenuator, a first photoelectric detector, an etalon and a second photoelectric detector. An etalon in the frequency detection unit is used as a frequency reference, an optical attenuator is arranged to reduce temperature rise and improve precision, a first photoelectric detector and a second photoelectric detector are used to provide a frequency measurement error signal and a reference signal, and the master control adjustment unit is used to carry out analysis and calculation according to the error measurement signal and the reference signal. And the laser emitting unit adjusts the laser frequency according to the adjusting signal, so that the frequency stabilization adjustment of the laser is realized.

The invention relates to the technical field of bus ducts, and particularly provides a sealing plate assembly of a heat dissipation type bus duct connection area, which comprises a top plate, a bottom plate and two side plates arranged oppositely, the two side plates are arranged between the top plate and the bottom plate, and the two side plates, the top plate and the bottom plate enclose to form a connection area outer cover space. The top plate comprises lap joint sections located at the two ends of the top plate and a middle section located between the two lap joint sections, and the two lap joint sections are in lap joint with the outer sides of the tops of the adjacent bus duct sections respectively. A heat transfer path is formed between the closing plate assembly on the outer side of the connection area and the adjacent bus duct sections, heat generated in the operation process of the connection area can be diffused to the adjacent bus duct sections, the heat diffusion range is enlarged, local gathering of heat near the connection area is reduced, and the service life of the bus duct is prolonged. And the heat dissipation capability of the connection area is improved, and meanwhile, the sealing protection requirement of the connection area is considered.

The utility model discloses a film capacitor for flexible direct current power transmission, which belongs to the technical field of capacitors and comprises a shell, a plurality of capacitor cores and extraction electrodes, the shell is made of metal materials, the plurality of capacitor cores are grouped to form a plurality of capacitor core independent groups, and the extraction electrodes are arranged in the shell. Each capacitor core independent group is connected with a tinned copper plate, the lead-out electrode is provided with a laminated busbar and is connected with the tinned copper plate in a matched manner through the laminated busbar, and the plurality of capacitor core independent groups are packaged in the shell through a potting material. The thin-film capacitor can simultaneously meet the performance requirements of low self-inductance, low temperature rise, high energy density, light weight and long service life, thereby effectively improving the safety and reliability of the thin-film capacitor for flexible direct-current power transmission.

This invention discloses a production line and equipment for surface correction of electro-galvanized steel wire, relating to the field of surface correction technology for electro-galvanized steel wire. It includes a functional box, a robotic arm, and a first clamping cylinder. A first servo motor is housed in a protective shell at the top of the outer wall of the functional box. The first servo motor is connected to the robotic arm via a rotating shaft. The robotic arm is connected to a first cylinder via a connecting rod. A first drawing die is mounted on the side of the outer wall of the first cylinder. A second servo motor inside the first cylinder is connected to a transmission shaft via a helical gear set. The transmission shaft is connected to the first clamping cylinder via threads on the outer wall. This invention, by installing a functional box, robotic arm, first cylinder, first clamping cylinder, limit ring, first servo motor, and second servo motor, achieves rapid and safe replacement of the drawing die, avoiding direct contact between workers and the high-temperature die, eliminating the risk of burns, greatly improving production efficiency and safety, and ensuring product quality stability.

The utility model discloses a miniaturized high moment has brush motor, this motor aims at solving the inductance element and carbon brush assembly and terminal of existing motor inside adopt direct welding mode, cannot keep reliable contact in the problem of vibration environment. The motor includes the shell, the stator subassembly of fixed mounting in the shell inside, the rotor subassembly of rotation installation in the shell inside and with the terminal subassembly of rotor subassembly electricity is connected, and the terminal subassembly includes the middle plate, installs the inductance in the middle plate, carbon brush assembly and conducting terminal, and one end of inductance is fixed after welding with the conducting terminal riveting, and the other end of inductance is fixed after welding with carbon brush assembly riveting. The utility model passes through independent riveting welding inductance both ends, realizes inductance and brush arm, inductance and the high strength mechanical locking and conducting connection of conducting terminal, and the anti -vibration performance is superior to direct welding mode, can keep reliable contact in the vibration environment.

The utility model discloses a frequency conversion heat dissipation control electric box which comprises an electric box shell, a heat dissipation air duct, a frequency conversion assembly, a control circuit assembly and a heat dissipation fan. The electric box shell comprises a back plate, a cavity formed in the first side of the back plate, a fresh air inlet and a fresh air outlet, wherein the fresh air inlet and the fresh air outlet communicate with the cavity. A through mounting hole is formed in the back plate; the control circuit assembly is installed in the cavity. The frequency conversion assembly is mounted on the mounting hole and comprises a frequency conversion controller arranged in the cavity and a radiator which is arranged in the heat dissipation air duct and is in heat conduction connection with the frequency conversion controller; the heat dissipation air duct is arranged on the second side of the back plate and comprises an air inlet and an air outlet which are communicated with the fresh air outlet; the air inlet and the air outlet are formed in the two sides of the radiator respectively. The heat dissipation fan drives external airflow to enter the cavity from the fresh air inlet, flow through the control circuit assembly and / or the variable frequency controller, flow through the fresh air outlet and the air inlet, enter the heat dissipation air channel, flow through the radiator and then are exhausted through the air outlet, and the heat exchange efficiency is further improved.

Provided in the embodiments of the present application is a megawatt parallel pipe type charging pile cable, specifically: the cable comprises a sheath assembly, a main power line, cooling pipes and core wires; wherein the cooling pipes are at least 4 in number; the sheath assembly covers the main power line, the cooling pipes and the core wires; the cooling pipes are arranged in close contact with the sheath assembly, and the cable is centrally provided with the core wires; the cooling pipes are distributed at equal intervals; the main power line comprises positive power lines and negative power lines, and the positive power lines and the negative power lines are arranged in one-to-one correspondence and symmetry; the positive power lines and the corresponding negative power lines are arranged in close contact with different cooling pipes, respectively. The present application adopts a multi-core split design for the main power line comprising positive power lines and negative power lines, each independent core wire is closely attached to the outer wall of the cooling pipe, heat conduction is strengthened through direct contact, and heat is efficiently transferred vertically to the cooling liquid.

The utility model discloses a large-current inverter inductor which comprises a circuit board, a first protective cover and a second protective cover are fixed to the top end of the circuit board, and a first magnetic core assembly and a second magnetic core assembly are installed in the first protective cover and the second protective cover respectively. The surface of the first magnetic core assembly is respectively connected with a first pin and a second pin, the surface of the second magnetic core assembly is respectively connected with a third pin and a fourth pin, and windings are wound on the surfaces of the first magnetic core assembly and the second magnetic core assembly. According to the utility model, the two groups of inductors are connected in parallel to share current, the total current bearing capacity is improved, and the temperature rise of a single inductor is reduced, so that a photovoltaic energy storage system or an industrial large-current scene can be met, the system reliability can be improved, and partial power transmission can still be maintained when a single inductor fails.

This invention provides a stator assembly and a motor. The stator assembly includes a stator core and multi-phase windings. The inner circumferential wall of the stator core has multiple slots along its circumference. Each slot has M layers of slots for conductor wiring. The multi-phase windings are arranged in the slots, where M is an even number. Each phase winding includes at least two parallel branches N, where N ≤ M / 2. The stator assembly is used in a motor with Q winding slots, P pole pairs, and m phases. The number of slots per pole per phase is q = Q / (2Pm), and the pole pitch is τ = Q / (2P). The stator assembly ensures that the conductors in the M layers of slots in each slot are all of the same phase through the winding of each phase winding. The stator assembly and motor provided by this invention can eliminate the need for insulating paper between conductors in the same slot, increase the copper fill factor of the windings, improve motor efficiency, reduce motor temperature rise, and simultaneously reduce insulation costs.

A bipolar multi-mode magnetic field generator comprises a positive polarity circuit, a negative polarity circuit and a load coil; the positive polarity circuit comprises a positive polarity charging module, a positive polarity energy feedback circuit module and n positive polarity single-stage discharge modules; the negative polarity circuit comprises a negative polarity charging module, a negative polarity energy feedback circuit module and n negative polarity single-stage discharge modules. The bipolar pulse magnetic field can be outputted through the synergistic effect of the positive and negative polarity circuits. Meanwhile, the pulse source has an energy feedback circuit structure, and the system energy saving and the coil temperature rise reduction can be realized through the commutation switch. In addition, the pulse source has a modular structure, and the various output modes can be realized through the module switch timing control, thereby greatly improving the output performance of the pulse magnetic field generator on the basis of ensuring the reliable operation. The output mode can be flexibly selected, and the bipolar triangular wave and the bipolar exponential wave output modes can be realized.

This utility model relates to the field of lead-acid battery equipment manufacturing technology, specifically to a cooling system for a lead-acid battery paste mixing machine. The system includes a paste mixing machine, an air-cooling system, a sulfuric acid storage tank, a pure water storage tank, a water-cooling unit, and a controller. The paste mixing machine includes a paste mixing cylinder with an external jacket. Air inlets and outlets are located on both sides of the cylinder. A lead-acid paste temperature-measuring thermocouple is installed on the cylinder and electrically connected to the controller. The air outlet of the air-cooling system is connected to the air inlet of the paste mixing cylinder, and the air outlet is connected to an exhaust pipe. The sulfuric acid storage tank and the pure water storage tank are respectively connected to the inner cavity of the paste mixing cylinder. The water-cooling unit includes a chilled water storage tank, an evaporator located within the chilled water storage tank, a compressor connected to the evaporator, and a condenser connected to the compressor via a throttling device. This utility model solves the problem of excessively high temperatures during the paste mixing process while maintaining the existing production process.

This application relates to a bucket-type battery pack, including battery cells and a circuit protection board, as well as a bucket body and a bucket lid. A battery module is housed inside the bucket body. The top of the inner wall of the bucket lid has an elastic pressure plate that abuts against the top surface of the battery module. Multiple mounting terminals protrude from the top of the battery module. The elastic pressure plate has clearance holes adapted to the mounting terminals. The circuit protection board is mounted on the mounting terminals. Two charging / discharging connectors, respectively electrically connected to the positive and negative terminals of the battery module, are located on both sides of the bucket lid. This utility model belongs to the field of battery pack technology. It adopts a bucket body + bucket lid structure, with a built-in battery module. The elastic pressure plate fixes the battery module, and the bucket structure provides a stable container. The elastic pressure plate ensures tight contact, improves structural stability, guarantees reliable circuit connections, has good shock resistance, and low contact resistance.

According to the relay, when a first contact part and a second contact part are separated from each other or make contact with each other to generate an electric arc, a magnetic field formed by a first permanent magnet can play a traction role on the electric arc, and the arc blowing and arc discharging effects are achieved. The electric arc moves along the contact surface, and when the electric arc moves to the arc isolating groove, the arc isolating groove can play a role in isolating, lengthening and blocking the electric arc, so that the arcing time is shortened. Therefore, the defects that the electric arc ablates the inner cavity and causes relay explosion and the like can be effectively avoided, the product performance can still be ensured even under the condition of high load, and the product failure probability can be reduced. And meanwhile, the first contact part is synchronously contacted with the at least two sheet units, and the first contact part and the second contact part have at least two contact points, so that the shunting effect is achieved, the contact resistance can be reduced, the contact stability and reliability can be improved, and the temperature rise can be reduced.

The application relates to the technical field of cooking utensils, in particular to a combustion device and a gas stove. The combustion device comprises a burner, a pot rack which is arranged around the outer side of the burner and is fixed with the burner, the outer periphery of the burner is tightly attached to the pot rack, the pot rack is provided with a heat storage cavity which is open downward and surrounds the burner, a partition plate is installed at the bottom of the pot rack to close the opening of the heat storage cavity, the middle part of the partition plate is provided with a hole position, and the bottom end of the burner is provided with an air inlet part which penetrates into the hole position. The partition plate has a heat insulation function, can effectively isolate the heat generated by the burner from radiating to the panel of the gas stove, reduces the temperature rise of the panel, and avoids scalding or panel explosion. The middle part of the partition plate is provided with a hole position, the bottom end of the burner is provided with an air inlet part which penetrates into the hole position. The above-mentioned arrangement ensures that the partition plate does not hinder the primary air intake of the burner, and ensures the smooth combustion of the burner.

The utility model discloses a switch, which comprises a base, a handle and a transmission rod, the handle is rotatably arranged on the base, a static contact piece and a movable contact piece are arranged in the base, transmission parts are arranged on two sides of the handle, one end of the transmission rod is rotatably connected with the transmission parts, and the other end of the transmission rod is rotatably connected with the movable contact piece. One end of the transmission rod is rotationally connected with the transmission part of the handle, the other end of the transmission rod is rotationally connected with the movable contact piece, the transmission rod plays a transmission role between the handle and the movable contact piece, and the contact areas of the transmission rod, the handle and the movable contact piece are very small, so that the heat transfer area during closing is reduced, the temperature rise of the handle is reduced, and the service life of the switch is prolonged. The handle is ensured not to deform during long-time switching on, and the stability and reliability of the product are improved.

The utility model discloses an improved electric fan motor, it includes casing, rotor subassembly, heat dissipation module and noise reduction ring. Rotor subassembly realizes high -efficient heat dissipation through heat -conducting silica gel strip, and heat dissipation module combines with air scoop and heat dissipation fin group optimization air current path, and noise reduction ring utilizes the damping block to absorb vibration energy, and the arc fairing of casing inner wall and micropore structure further reduce the noise. In addition, the rubber pad layer of mounting seat bottom reduces vibration transmission. The present application can effectively reduce energy consumption, improve the heat dissipation performance and significantly reduce the noise, satisfy the demand of user to high -efficient, mute electric fan motor.

The utility model belongs to the field of circuit breakers, and particularly relates to an isolation circuit breaker which comprises a mechanism frame, a circuit breaker unit and an isolation switch unit, the isolation switch unit comprises an isolation shaft, an isolation knife and a static contact, the isolation knife is in linkage fit with the isolation shaft, the isolation knife acts along with the isolation shaft, and connection or disconnection of the isolation knife and the static contact is achieved. Two cooling fins are arranged at the positions, corresponding to the two sides of the isolation knife, of the static contact, one end of each cooling fin is provided with a contact part extending in the direction of the isolation knife, and when the isolation knife is connected with the static contact, the contact parts of the two cooling fins are attached to the two sides of the isolation knife respectively; the two cooling fins are additionally arranged on the static contact, when the isolation knife is connected with the static contact, the contact portions of the two cooling fins are attached to the two sides of the isolation knife, the cooling fins can conduct heat of the isolation knife, heat dissipation of the isolation knife is facilitated, and therefore temperature rise can be reduced.

A battery and terminal device are disclosed. The battery includes a cell and a circuit board assembly. The cell includes a first tab, a second tab, a third tab, and a fourth tab arranged sequentially along a first direction. The first tab and the second tab have the same polarity, the third tab and the fourth tab have the same polarity, and the second tab has the opposite polarity to the third tab. The circuit board assembly includes a first circuit board, a first connector, a second connector, a third connector, a fourth connector, and a protection switch module. The first connector, the second connector, the third connector, and the fourth connector are arranged sequentially on the first circuit board along the first direction. The first circuit board integrates a first circuit and a second circuit. The first circuit includes a first branch connecting the first connector and the second connector in series, and the second circuit includes a third branch connecting the third connector and the fourth connector in series. The protection switch module is connected in series in either the first branch or the third branch. This battery is advantageous for improving energy density.

The application relates to a winding structure of a motor for an electric vehicle, comprising a stator, the stator comprising tooth bars, tooth slots and windings, the windings being wound on the tooth bars in clockwise or counterclockwise directions, the windings on the same tooth bar being wound in batches, the winding directions of the windings on the same tooth bar being the same, and the windings on the same tooth bar being connected in series. The winding structure of the application increases the conductor wire diameter of the motor winding, the windings on the same tooth are wound in batches, the crowded position of the copper wire is effectively avoided, the idle tooth slot space is utilized, the slot fill factor is greatly improved, the current carrying capacity of the motor is improved, the copper consumption is reduced, the motor efficiency is improved, the output torque and the cruising range are increased.

The application belongs to the technical field of titanium alloy processing, and discloses a preparation method of TC4 titanium alloy bar for aerospace fasteners. The preparation method adopts the full-process temperature control and rolling production line to roll the large single heavy hot-rolled coil with uniform rolling organization and consistent performance on the basis of electron beam cold hearth furnace and vacuum consumable arc furnace smelting, including ingot smelting, forging, polishing, first rolling, centerless peeling, pickling and polishing, second rolling and the like. The finished bar with a diameter of 6-21 mm is prepared through drawing, peeling, sawing, heat treatment and other machining processes. Compared with the preparation of finished bar by transverse rolling mill hot-rolled bar, the TC4 titanium alloy bar for fasteners prepared by the method has more uniform organization performance and higher microstructure grade, and is more in line with the service requirements of the fastener factory upsetting and the finished fastener.

This utility model discloses an anti-slip double-row tapered roller bearing, comprising an outer ring and an inner ring. The outer ring has an internal groove, and a hard alloy layer is laid on the inner surface of the internal groove. A transition layer is laid on the outer surface of the hard alloy layer, and a soft magnetic alloy layer is laid on the outward side of the internal groove. A permanent magnet array is laid on the outer surface of the inner ring, and a cage is laid on the permanent magnet array. A cage pocket is formed on the outer surface of the cage, and a groove is formed inside the cage pocket. This device uses magnetic attraction technology to reinforce the rollers, ensuring that the rollers are tightly fitted with the raceway during high-speed operation, effectively preventing slippage and improving the stability and service life of the bearing.

The application discloses a network voltage interruption simulation device and method, a storage medium and an electronic device. The device comprises: a fast mechanical switch branch connected to a power supply at one end and to an input end of a measured device at the other end; an electronic switch buffer energy absorption branch connected in parallel with the fast mechanical switch branch and provided with an electronic switch, used for diverting and shutting off loop current; and a control unit in communication with an upper computer, the fast mechanical switch and the electronic switch respectively, used for controlling interruption of the fast mechanical switch and the electronic switch according to a control instruction of the upper computer. The device solves the problems of long opening and shutting off delay and poor controllability of a parallel mechanical contactor, can accurately simulate network voltage interruption working conditions with different time lengths, has low on-state loss, small temperature rise, small volume and light weight, can quickly protect a test system and a measured converter device, makes a network voltage interruption test more convenient and fast, and further improves the safety and reliability of the test system.

The utility model belongs to the technical field of transformers, and discloses a transformer shielding assembly and a transformer. The transformer shielding assembly comprises a clamping structure assembly and a shielding unit, the clamping structure assembly comprises a first pull rod, a second pull rod and at least two clamping pieces, a silicon steel sheet group is placed between the two clamping pieces, the two ends of the first pull rod penetrate through the clamping pieces, and a first fastener is used for locking the first pull rod and the clamping pieces; the two ends of the second pull rod penetrate through the corresponding drawstring bases, and the second fastener is used for locking the second pull rod and the drawstring bases. And the shielding unit is connected with the clamping structure assembly and is used for shielding leakage magnetic flux generated by winding leads of the silicon steel sheet group. According to the utility model, the influence of leakage magnetic flux generated by the lead on the clamping structure assembly of the transformer can be shielded, the temperature rise of the clamping structure assembly is reduced, and the energy-saving operation of the transformer is facilitated.

The invention provides a permanent magnet synchronous motor for flywheel energy storage, and belongs to the technical field of motor rotor structures. The stator sleeves the rotor, and an air gap is arranged between the stator and the rotor. The rotor fixedly sleeves the rotating shaft. The rotor comprises a rotor iron core, a permanent magnet group, a magnetic bridge, a magnetic barrier group and a magnetic barrier isolation group; the rotor iron core is coaxially assembled on the inner side of the stator iron core, an air gap is formed between the rotor iron core and the stator iron core, the permanent magnet sets are arranged in the rotor iron core, located at the axis position of a rotor straight shaft and connected with the magnetic barrier sets, magnetic bridges are arranged between adjacent magnetic barriers in the magnetic barrier sets, and the multiple magnetic barrier sets are all arranged on the edge of the rotor iron core. And two adjacent magnetic barrier groups are symmetrically arranged on the two sides of the axis of the rotor straight shaft. The magnetic field sinusoidal property can be improved, the iron core loss is reduced, the temperature rise of the motor is reduced, the direct-axis inductance of the motor is larger than the quadrature-axis inductance, the counter electromotive force of the motor is small during no-load, and the corresponding no-load loss is low; and the stable terminal voltage is maintained by adjusting the armature current during loading.

This invention proposes a structure, assembly method, and a laminated pole synchronous motor for improving the heat dissipation capacity of the damping strip in a laminated pole synchronous motor. It belongs to the field of laminated pole synchronous motors. The invention solves the problem of how to effectively improve the heat dissipation capacity of the damping strip in a laminated pole synchronous motor. The heat dissipation structure consists of multi-layered fins welded to the damping strip of the laminated pole synchronous motor. A graphene coating is sprayed onto the fins and damping strip. The damping strip has a hollow structure filled with phase change material. One end of the damping strip is fixed to a damping ring, and the other end is connected to the pole core. Heat dissipation fins are provided at the bottom of the damping ring. This invention employs a composite heat dissipation system of "internal phase change flow heat transfer + fins + damping ring heat dissipation fins": internally, the phase change cycle of the phase change material promotes uniform heat distribution; externally, the heat dissipation fins on the surface of the damping strip and the integrated heat dissipation fins of the damping ring form a three-dimensional heat dissipation network, significantly accelerating the transfer of heat from the damping winding to the external environment.

A kind of double-contact circuit breaker.The utility model provides a double-contact circuit breaker, mainly solves the problem of high temperature rise of current adoption series double-contact circuit breaker.Its characterized in that: the static contact includes first static contact point (21) and second static contact point (22) in parallel on circuit;The moving contact includes first moving contact (51) and second moving contact (52) in parallel on circuit, first moving contact is oppositely arranged with the first static contact point, second moving contact is oppositely arranged with the second static contact point;Partition (6) is arranged between two the arc-extinguishing chambers, part the partition is arranged in the arc running channel and is divided into two chambers.This utility model provides a double-contact circuit breaker, adopts parallel double-contact structure, and the temperature rise is lower.

The utility model relates to a moving contact of a molded case circuit breaker, which comprises a moving contact frame, a plurality of moving contact blades and a connecting plate, a rotating shaft is arranged in the moving contact frame, the plurality of moving contact blades are arranged in the moving contact frame side by side in a penetrating manner, the rotating shaft penetrates through the rear ends of the moving contact blades, the front ends of the moving contact blades extend out of the moving contact frame, and a contact point is arranged below the top end of each moving contact blade. The connecting plates are connected to the rotating shaft and are tightly attached to the moving contact blades, bosses facing one side are formed on the moving contact blades, gaps are formed among the plurality of moving contact blades under the support of the bosses, the plurality of connecting plates are respectively arranged on the two sides of the moving contact blades and in the gaps among the moving contact blades, gaps are formed among the moving contact blades through the support of the bosses, and the moving contact blades are connected with the connecting plates. The back of the moving contact piece keeps consistent front and back of the gap through the connecting plate, thereby facilitating the heat dissipation of the moving contact piece, reducing the temperature rise, and prolonging the service life.

The application discloses a battery and a manufacturing method thereof, and the battery comprises a positive current collector layer, which is a composite structure with dense normal layers and porous functional layers alternately distributed formed on an aluminum foil substrate through electric field assisted selective etching, a positive electrode sheet coated with positive active material aluminum powder and subjected to formation treatment, and a top cover assembly and a bottom cover assembly connected with the positive and negative electrodes through full-tab cross-section laser welding and full-tab end face laser welding respectively; the manufacturing method comprises the steps of preparing a composite positive current collector layer, coating active material, assembling a battery cell, laser welding and packaging, etc. The specific surface area and ion transmission efficiency are greatly improved through the composite current collector layer structure, the internal resistance and temperature rise are reduced by combining the optimized full-tab welding process, so that the rate performance, cycle stability and thermal safety of the battery are significantly improved, and the battery is suitable for the manufacturing of high-power long-life batteries such as electric vehicles and energy storage systems.