636 results about "High power density" patented technology

The invention belongs to the technical field of robot and intelligent equipment driving, and discloses an integrated servo push rod and a control method.A push rod module is integrally designed, and a high-density motor, a ball push rod and a band-type brake are arranged in the push rod module. The invention has the characteristics of high power density, small volume, high precision, high response speed, low noise, long service life, high reliability and the like. The inside of the push rod is contacted with the deep groove ball bearing at the tail end of the screw rod through the ball retainer, and the outside is contacted with the oil-free bushing, so that the lateral strength of the push rod is improved, friction is reduced, and operation efficiency is improved. A linear encoder is arranged at the end of the screw rod, accurate control of the tail end can be achieved, a magnetic encoder is arranged at the tail end of the motor, input and output end double-closed-loop can be achieved, precision can be improved, and errors of band-type brake in power-off response time can be compensated; the lead screw is connected with the motor through the diaphragm coupling in the motor, so that the axial space is saved, and the service life of the motor is prolonged.

The invention discloses a wire connecting structure of a flat wire stator, and belongs to the technical field of energy-saving motors, the wire connecting structure comprises a stator core and a stator slot, a winding is arranged in the stator slot, the stator core and the winding form a stator, the stator is a concentrated winding type stator, the longitudinal section of the winding is of an octagonal structure, and the winding is arranged in the stator slot. And the left and right sides of the windings can be broken to reduce the number of used molds and reduce the winding difficulty of the windings, and one end of each of two outgoing lines of each group of windings is on the outer diameter side of the stator while the other end is on the inner diameter side of the stator. According to the wire connecting structure of the flat wire stator, the cross section of the winding is of an octagonal structure, folding can be carried out on the two sides, the number of molds can be reduced, the winding difficulty of the winding can be reduced, compared with a traditional winding with a rectangular cross section, the slot fullness rate can be increased by 4%-8%, the end space is small, the number of opened molds is reduced, the winding difficulty of the winding is reduced, the cost is reduced, and the slot fullness rate, the power density and the efficiency are high.

According to the motor, the power system based on the motor and the adjusting method, convex ribs are arranged on an end plate of a rotor, the rotor is used for driving the convex ribs to rotate and driving cooling lubricating oil to form forced circulation in an air gap, the heat transfer efficiency of the rotor and a stator is remarkably enhanced, and the temperature rise of the rotor and the demagnetization risk of a permanent magnet are effectively controlled; meanwhile, the lubrication condition of moving parts is improved, and energy consumption and complexity caused by an extra oil pump are avoided; through the integrated design of the motor shell and a half box body of the gear box and the communicating oil duct of the sealing plate and the gear box, a shared lubricating system is constructed, cooling lubricating oil circulation sharing and heat dissipation cooperation are achieved, the overall structure is simplified, and the system reliability is improved; on the premise that the size and the weight are not increased basically, the comprehensive benefits of improving the heat dissipation performance, simplifying the system structure and reducing the manufacturing cost are synchronously achieved, and the power module is particularly suitable for application scenes with limited space and high power density requirements.

The invention belongs to the technical field of heat dissipation of high-power-density electronic devices, and relates to a topological cold plate and vapor chamber integrated structure which comprises a cover plate, a first heat exchange plate and a second heat exchange plate which are sequentially overlapped from top to bottom and are connected in a sealed mode to form the integrated structure, and a cooling cavity used for containing a liquid working medium is defined between the cover plate and the first heat exchange plate. A phase change cavity used for containing a two-phase heat transfer working medium is defined between the first heat exchange plate and the second heat exchange plate, the cooling cavity and the phase change cavity are independent of each other, and heat transfer is achieved through the solid metal wall face of the first heat exchange plate. During use, the second heat exchange plate is attached to an electronic device, heat generated when the electronic device works is transferred to the second heat exchange plate, so that the two-phase heat transfer working medium in the phase change cavity is evaporated to generate steam, and the steam is diffused in the phase change cavity, then is in contact with the upper wall surface, is condensed when encountering cold and releases latent heat; heat is conducted to the cooling cavity through the first heat exchange plate to be absorbed by the liquid working medium. The structure is compact, the temperature equalizing performance is enhanced, and the heat transfer efficiency is improved.

The single-phase bidirectional single-stage isolation matrix converter comprises a pre-stage circuit and a post-stage circuit, and the pre-stage circuit comprises an LC filter on the power grid side, a pre-stage single-phase matrix conversion circuit and an LLC resonance circuit with a high-frequency transformer; the post-stage circuit comprises a post-stage conversion circuit and an output filter capacitor; the front-stage single-phase matrix conversion circuit comprises four bidirectional switch assemblies of a full-bridge structure. Each bidirectional switch assembly comprises two unidirectional controllable MOS tubes which are reversely connected in series, one end of each bidirectional switch assembly is connected to an L line or an N line of a power grid, and the other end of each bidirectional switch assembly is connected to the LLC resonance circuit. The rear-stage conversion circuit comprises a bidirectional MOS (Metal Oxide Semiconductor) tube bridge circuit and three high-frequency transformer secondary windings which are in triangular connection or star connection; and two end points of each secondary winding are respectively connected to the upper MOS tube and the lower MOS tube of the corresponding bridge arm and then are connected to output positive and negative ends. The converter has the advantages of high power density, low current harmonic, high power factor and the like, and is small in size, strong in anti-interference capability, wide in buck-boost range, and safe and reliable in commutation.

The invention relates to the field of electronic power, particularly discloses a bridge resonant converter based on forward and reverse shock coordination of double transformers, and belongs to the technical field of power electronic conversion. Aiming at the problems of over-high peak current, high magnetic core saturation risk, remarkable switching loss and the like of a traditional LLC resonant converter under the requirements of a wide load range and high power density, the invention provides the following innovative schemes: a dual-transformer forward and reverse excitation collaborative structure, a zero voltage switching (ZVS) driving technology and resonant network parameter optimization.

Thermionic generators are described herein that include a variety of features that allow the devices to efficiently and effectively convert large amounts of thermal energy directly to electrical energy, such as in the form of currents and / or voltages. For example, the thermionic generators can be used to generate an electron beam from a thermionic emission device, and focus or shape the electron beam in such a way that allows the energy of electrons in the electron beam to be captured and converted to electrical energy.

The invention discloses an axial skewed pole mixed excitation V-shaped Halbach permanent magnet flux switching motor, which comprises a first stator, a first rotor, a magnetic isolation disc, a second rotor, a second stator, an excitation winding and an armature winding which are sequentially and coaxially stacked by adopting a multi-section axial stacked structure, each of the first stator and the second stator comprises a double-U-pi type stator iron core module, a magnetic isolation sheet, a permanent magnet pair and a permanent magnet; the first rotor and the second rotor are respectively attached to the two sides of the magnetic isolation disc, the first stator and the second stator are respectively composed of six double-U-pi type stator core modules and six magnetic isolation sheets in an alternating mode, permanent magnet pairs are arranged in the double-U-pi type stator core modules, and permanent magnets are arranged on the outer sides of the double-U-pi type stator core modules; the excitation winding is wound on the double U-pi type stator iron core module in a crossing mode, and the armature winding is wound on the root portion of the double U-pi type stator iron core module. The permanent magnet synchronous motor has the advantages of high power density, high torque density, high stability, wide speed regulation range, low harmonic loss, high fault tolerance and high reliability.

The invention provides an embedded power module assembly and a vehicle with the same. The embedded power module assembly includes: a plurality of copper foil layers; the number of the chips is multiple, the multiple chips are arranged among the multiple copper foil layers, part of the chips are arranged in the upper bridge areas of the copper foil layers, and the other part of the chips are arranged in the lower bridge areas of the copper foil layers; the plurality of chips are connected with one of the copper foil layers through the heat dissipation base; and the heat-conducting medium layer is arranged on the inner side of the copper foil layer close to one side of the tail end, and the heat-conducting medium layer is attached to the copper foil layer provided with the chip. The problem of high switching loss caused by large parasitic inductance of a power module in a high-power-density electric drive system in the prior art is solved.

The invention discloses an electric aircraft high-voltage power distribution control method and system, a medium and a product thereof, and relates to the technical field of high-voltage power distribution, and the method comprises the steps: receiving a DC power supply outputted by a power battery pack, and achieving the power-on soft start through a pre-charging loop; distributing electric energy to a motor controller, an auxiliary power supply module, an air conditioning system and an electric heating system through a power distribution level according to the load priority; the power distribution stage integrates multiple solid-state relays or contactors to form load branches. An independent protection unit is configured for each load branch at a load output stage, and the independent protection units monitor voltage, current and temperature parameters in real time and execute fault isolation operation when the monitored parameters exceed corresponding preset thresholds. According to the invention, high-voltage power distribution control with load priority scheduling and branch-level rapid fault isolation is realized under the condition of high power density.

The invention relates to the technical field of switching power supplies, and discloses a gallium nitride charger based on a 494 PWM chip, which comprises a power panel, a rectification circuit module, a half-bridge gallium nitride driving module, a transformer, a 494 chip control module, a totem pole driving module, an isolation driving transformer, a full-wave rectification module, a filter circuit module and a conversion circuit module, the core is that the 494 chip control module generates a PWM signal, and the PWM signal sequentially passes through the totem pole driving module for current amplification and the isolation driving transformer for electrical isolation and signal coupling to drive the two gallium nitride transistors in the half-bridge topology for high-frequency alternate switching. According to the invention, the high-speed switching characteristic of the gallium nitride device is fully exerted, and the charger can work at a higher frequency, thereby reducing the switching loss, reducing the size of a magnetic element, and achieving the high power density and high overall conversion efficiency while improving the power level to a kilowatt level.

The invention discloses a disc type motor, which belongs to the technical field of axial flux motors and comprises a stator and rotors arranged on two axial sides of the stator. Axial permanent magnets and circumferential permanent magnets are sequentially and alternately arranged in a rotor in the circumferential direction to form magnetization distribution of Halbach arrangement, so that an air-gap magnetic field is enhanced, inter-pole magnetic leakage is reduced, and the utilization rate of the permanent magnets is improved; after the rotor pole face is combined with the corresponding rotor pole face, the air gap flux density distribution on the two sides is approximately consistent, so that the axial magnetic pulling force difference is restrained, the high power density of the motor is guaranteed, meanwhile, double-air-gap flux density balance is achieved, the dynamic balance performance under high-speed operation is improved, noise and vibration are reduced, and the axial force balance and service life of system steady-state operation are effectively improved.

The invention provides a temperature control system and method based on a fuzzy PID composite algorithm, and relates to the technical field of temperature control. According to the system, the circulation rate of a liquid-phase heat transfer medium is precisely regulated and controlled through a micropump, the gas-phase heat transfer efficiency is enhanced in combination with a fan, and real-time feedback of a temperature detection module and closed-loop cooperative adjustment of a main control module are matched; a composite control framework is constructed through a fuzzy control module and a PID control module, and wide-range, high-precision and rapid temperature control over a target object is achieved. The fuzzy control module dynamically adjusts PID parameters in real time according to the temperature deviation and the deviation change rate, the PID control module outputs accurate control signals based on the adjusted parameters, a micropump and a fan are driven to adjust the temperature of a target object, and the problems that a traditional temperature control system is slow in response, narrow in temperature control range and poor in high and low temperature scene adaptability are solved. The system is suitable for scenes such as temperature control of high-power-density assemblies and heat dissipation of electronic devices.

The invention discloses a bypass inductor echelon current limiting topology and method for solid-state power distribution equipment, relates to the technical field of power electronic distribution, and is suitable for solid-state power controllers in the fields of aerospace, new energy automobiles and industrial automation. In order to solve the problems that when a large capacitive load is started, a current peak is likely to be generated to damage a device, and an existing current limiting scheme is low in efficiency or large in size, the topology comprises an input circuit, a main power circuit, an auxiliary circuit, a current limiting circuit, an absorption circuit and a load side circuit. According to the method, the auxiliary circuit switch tube is turned on in an echelon mode, and the main switch tube is turned on to complete starting after load voltage approaches power supply voltage and reaches a non-voltage-difference condition. According to the planar inductor integrated PCB, the size is reduced, the problem of long-term heating of a resistor is solved, the TVS overvoltage protection and RC anti-interference design are matched, the current peak is effectively restrained, the system efficiency and reliability are improved, and the high-power-density and differential-pressure-free starting requirements are met.

The invention discloses a high-energy sodium ion hybrid capacitor, which is characterized in that an active material of a positive electrode is a sodium ion battery type positive electrode material, an active material of a negative electrode is a carbon material with a high specific surface area, and an electrolyte is an organic ether electrolyte containing sodium ions; and the mass ratio of the active material of the positive electrode to the active material of the negative electrode is (1: 1)-(2.5: 1). The working voltage of the high-energy sodium ion hybrid capacitor is up to 4.1 V, the high-energy sodium ion hybrid capacitor has high energy density, high power density and tens of thousands of cycle stability, pre-sodium treatment is not needed in device assembly, and large-scale preparation is easy.

The invention discloses an enhanced GaN HEMT (High Electron Mobility Transistor) device based on a composite gate and gate terminal expansion and a preparation method thereof, the p-InGaN and p-GaN / p + GaN layer heterojunction polarization effect in the composite gate structure of the enhanced GaN HEMT device can generate two-dimensional hole gas on an interface, and more holes are injected into a channel to be compounded with electrons when high leakage voltage is turned off; the electron concentration of the lower channel layer near the gate is reduced, so that electron capture of the buffer layer on the channel layer is inhibited, the dynamic performance of the device is improved, the reliability of the device is enhanced, the gate terminal expansion structure is utilized to expand the composite gate structure, the off-state electric field distribution of the device is optimized, and the reliability of the device is improved. The electric field peak value of the edge of the gate field plate can be redistributed and weakened, the current collapse effect is effectively restrained, and the preparation method of the device is simple in process and low in cost. According to the scheme, the gate stability and the dynamic performance of the device can be improved, and a reliable device basis is provided for a GaN power system with higher frequency, higher efficiency and higher power density.

The invention relates to the technical field of electronic devices, discloses a low-thermal-resistance insulation integrated top heat dissipation power device, and aims to solve the problems that a traditional power device is high in thermal resistance, insufficient in insulation reliability and complex in assembly. The device comprises a frame base island, an insulating layer, a SiC chip, a bonding aluminum wire, a pin, an injection molding body and a metal heat dissipation top cover, the insulating layer is a high-thermal-conductivity ceramic layer such as aluminum nitride, the thickness of the insulating layer is 20-150 micrometers, the insulating layer and the frame base island are integrated through high-temperature oxidation bonding, and the metal heat dissipation top cover is bonded with the insulating layer in a low-thermal-resistance mode. An external insulation part is not needed, the assembly process is simplified, an efficient heat dissipation channel is constructed, contact thermal resistance is reduced, meanwhile, wide-temperature-range insulation stability is guaranteed, long-term operation reliability and service life of the device are improved, and the structure is suitable for a high-power-density power electronic scene.

The invention provides an energy regulation and control method and device of a battery and capacitor composite energy storage pump control system, and relates to the technical field of energy regulation and control of electric engineering machinery, the energy regulation and control device comprises a storage battery, a super capacitor, a direct current converter, a rectification inverter, a permanent magnet synchronous motor, an electric proportional pump motor, an overflow valve, a hydraulic control one-way valve, an energy accumulator and a hydraulic cylinder, a storage battery and a super capacitor form a composite power supply through a direct-current converter, the composite power supply drives a permanent magnet synchronous motor through a rectification inverter and drives an electric proportional pump motor to control a hydraulic cylinder, and by optimizing an energy regulation and control distribution strategy of the composite power supply and combining an energy accumulator, the energy of the hydraulic cylinder is regulated and controlled under the working conditions of starting, braking and high-power fluctuation of engineering machinery. Instantaneous high peak power is preferentially provided or absorbed by the super capacitor, and energy is supplied by the storage battery in a stable working condition. The advantages of high energy density of the battery and high power density of the super capacitor are combined, complex working conditions are effectively handled, stable operation of the system is guaranteed, the service life of the battery is remarkably prolonged, and economical efficiency is improved.

The application relates to the technical field of power supply, and discloses a synchronous rectification control circuit and a synchronous rectification power supply device, which comprise a power conversion module, an output current sampling module and a PWM controller; the power conversion module comprises a freewheeling switch tube and is connected in parallel at two ends of a load; the output current sampling module is connected in series in a secondary winding loop, is used for collecting an output current flowing through the secondary winding loop, and generates an output current signal; the PWM controller is connected with the output current sampling module and is used for driving the freewheeling switch tube; the PWM controller is configured to compare the output current signal with a preset threshold value, generate a first group of PWM control signals when the output current signal is greater than or equal to the preset threshold value, and drive the freewheeling switch tube; and stop driving the freewheeling switch tube when the output current signal is less than the preset threshold value. The application can reduce no-load loss and adapt to the demand of electronic products for high power density and low loss.

The invention relates to the technical field of power electronic component manufacturing and advanced composite material application, in particular to a 3D inductor based on the Ampere's law and a method thereof. The three-dimensional precise interlocking winding comprises a functional composite framework, a three-dimensional precise interlocking winding and a magnetic core assembly, according to the system, a framework is formed by compositing a heat-conducting insulating substrate and soft magnetic powder, and air gaps between winding layers are physically filled through step-shaped positioning ribs; the core is that a low-thermal-resistance export path is established by utilizing the high heat conduction characteristic of the framework, and a heat conduction mode is converted from coil-to-air to coil-to-framework; the gradient difference between the core temperature and the surface temperature in the coil is effectively reduced through the embedded heat dissipation array, the heat dissipation problem under the high power density is solved, and the device performance is remarkably improved.

The utility model provides a kind of high power density's lead-acid battery assembly structure, belong to battery technical field.This assembly structure includes: be equipped with several along vertical extension's sliding slot on the inner wall of box, bottom frame is equipped with in the bottom surface inside box, several placing grooves are equipped with in the inside of bottom frame, lead-acid battery is located in placing groove, hollow board is equipped with between adjacent lead-acid battery, sliding block is equipped with outside limiting ring, sliding block and sliding slot sliding fit, limiting ring keeps between lead-acid battery and the inner wall of box, plug-in board is equipped with in the lower end of pressure ring, plug-in board is inserted in the mouth, pressure ring is pressed on the upper end of lead-acid battery, locking pin is rotatably connected with in the upper end edge of box, locking pin is pressed on the upper end of pressure ring.This assembly structure can stably play the load bearing, fixed effect to battery, make each outer wall of battery be limited and positioned, to realize good anti-vibration performance.Moreover, this assembly structure is convenient, efficient to disassemble and assemble.

The invention discloses an integrated rectifier diode module of a three-dimensional spiral structure, and relates to the technical field of power semiconductor devices, the integrated rectifier diode module of the three-dimensional spiral structure comprises an electrical function unit and a thermal management unit which are integrated in a monolithic mode, and the electrical function unit and the thermal management unit are coaxially arranged to achieve electric-thermal collaborative optimization. The specific structure is as follows: the electrical function unit comprises a substrate layer, an N + GaN conduction layer, an N-GaN drift layer and a three-dimensional spiral super-junction structure embedded in the N-GaN drift layer, the substrate layer, the N + GaN conduction layer, the N-GaN drift layer and the three-dimensional spiral super-junction structure are sequentially stacked from bottom to top, the three-dimensional spiral super-junction structure is formed by alternately and spirally arranging P-NiO regions and N-GaN regions, and charge balance is achieved; the electrical function unit further comprises an anode electrode and a cathode electrode, the anode electrode is arranged at the top of the three-dimensional spiral super-junction structure, and the cathode electrode is arranged on the surface of the N + GaN conduction layer; according to the invention, the power density is improved, the high-power application requirement is met, the device is suitable for the high-power-density field, the environmental adaptability is high, and the stable performance can be kept at different working temperatures.

The present application relates to the technical field of power electronic control, and discloses a split-phase inverter with low no-load power consumption, a control method thereof and a storage medium, wherein a group of complementary switching tubes is arranged on the AC side and a group of high-frequency switching tubes is arranged on the DC side, so that the complementary switching tubes and the high-frequency switching tubes are controlled to emit waves in a first wave-emitting mode when the split-phase inverter is in a starting state, thereby reducing the reactive circulating current of the split-phase inverter and reducing the no-load power consumption of the split-phase inverter; meanwhile, when the real-time output current of the split-phase inverter is greater than or equal to a first current threshold, the complementary switching tubes and the high-frequency switching tubes are switched to emit waves in a second wave-emitting mode, thereby ensuring that the split-phase inverter can be normally loaded; compared with the related prior art, the split-phase inverter can not only solve the problem of high no-load power consumption, but also does not need large-current switching tubes or large radiators, has a smaller product size, a high power density and a lower cost.

The invention discloses a two-wheeled vehicle energy recovery system and method. The system comprises an environment sensing module (a GPS, an air pressure sensor, a gyroscope, a terrain processor and a Kalman filtering prediction gradient), a signal acquisition module (a brake force sensor, a wheel speed sensor, a load sensor, a temperature sensor and a double-SOC sensor), and a super capacitor module (an energy storage area is made of a high-energy density material; the energy discharge region is made of a high-power-density material; the execution output module comprises a hub motor, a rectifier, a double-LLC converter, a relay, a clutch, a PTC and a liquid cooling system. The method comprises the steps that 1, dynamic energy recovery is conducted, specifically, the total required braking force is calculated during braking, regeneration or friction braking is selected according to the SOC of an energy storage area, and the regenerative braking force is limited by motor characteristics and capacitor voltage; 2, intelligent energy transfer: an energy storage area SOCgt; and when the temperature is 80%, the transfer amount is calculated according to the state, and is transferred within the temperature control range of-20 DEG C to 65 DEG C through SOC correction in an energy discharge region. According to the invention, the recovery efficiency and the service life of the system are optimized through capacitor partitioning and multi-mode control.

We provide liquid-cooled thermal management solutions to improve volumetric power density for pulse load power converters and other applications where space is constrained. [Solution] A power converter using a liquid cooling system to cool a liquid-cooled transformer 100, wherein the coils 135 of the transformer 120 are in physical / thermal contact with a cold plate 160 embedded in a thermally conductive solid (epoxy or resin) and sandwiched between the coils and / or in contact with the outer surface of the coils. In addition / or, the cold plate may also be in physical / thermal contact with the transformer core. A cooling fluid is supplied so as to flow through the cold plate. In another embodiment, the transformer is immersed in a cooling fluid such as oil in a thermally controlled housing that houses the coils. The cold plate is in physical / thermal contact with the housing. The cooling fluid supplied into the cold plate conducts heat from the oil-surrounded transformer.

The invention discloses a PCB wiring structure for reducing winding end height for a concentrated winding type motor, and relates to the field of stator cores, the PCB wiring structure comprises a stator core and a stator tooth part arranged at the inner side end of the stator core, stator grooves are formed in the stator core at equal intervals, the stator core is of a split structure, and the stator tooth part is arranged at the inner side end of the stator core. The stator tooth part is surrounded by a flat copper wire, and the upper end of the flat copper wire is provided with a PCB. According to the PCB wiring structure capable of reducing the winding end height for the concentrated winding type motor, the stator iron core adopts a split-half structure, so that integral manufacturing and splicing of a flat copper wire winding can be conveniently completed at a tooth part, the stator iron core is fixed through pins, the stator slots are designed to be parallel slots, the space utilization rate in the slots is remarkably improved, and the winding end height is reduced. According to the split-half structure, the assembly process of the winding is greatly simplified, dependence on complex process equipment is reduced, it is ensured that the motor still keeps structural reliability and precision during high-speed operation or load sudden change, and a mechanical foundation is laid for high-power-density design.

The invention discloses a three-phase staggered four-switch buck-boost integrated LLC (Logical Link Control) DCDC (Direct Current to Direct Current) isolation converter. The converter comprises a transformer based on magnetic integration design and a primary side circuit and a secondary side circuit which are connected with two sides of the transformer, the primary side circuit comprises a three-phase staggered parallel four-switch boost-buck circuit and a three-phase LLC resonant circuit, and each stage of four-switch boost-buck circuit comprises four switch tubes and a preceding-stage inductor. The front two switch tubes are located between the positive electrode and the negative electrode of the direct-current bus and form a front bridge arm, the rear two switch tubes are located between the middle bus and the negative electrode of the direct-current bus and form a rear bridge arm, and the front-stage inductor is connected between the middle point of the front bridge arm and the middle point of the rear bridge arm. The three ends of the three-phase LLC resonant circuit are correspondingly connected with the midpoints of the three rear axle arms respectively; the resonant capacitors of the LLC circuits are in angular connection, and other circuits of the LLC circuits are in star connection; the secondary side circuit is composed of a three-phase interleaved parallel full-wave rectification circuit. The invention has the advantages of wide input, high efficiency, high power density and high switching frequency.

This invention discloses a stepped high-power-density solid-state relay structure and its assembly method. The relay structure includes a control component, a power component, and a cover plate. The power component includes a two-channel DC structure, a two-channel bidirectional structure, and a four-channel combined structure, all composed of a ceramic housing, a light-emitting diode chip, and a power chip. The ceramic housing has a cavity, and the interior of the cavity is divided into a first step, a second step, and a third step from bottom to top. The light-emitting diode chip is disposed on the first step. The front of the control component is bonded to the interior of the power component, and the back of the control component is electrically connected to the interior of the power component, forming an assembly. The assembly is hermetically sealed to the cover plate. The assembly method includes the following steps: S1: control component assembly; S2: power component assembly; S3: assembly of the assembly; S4: finished product assembly and sealing. This application achieves a compact assembly of the control component and the power component by adding a compact stepped structure and using a double-sided bonding process, thereby improving the power density of the device.

The invention relates to the technical field of battery liquid cooling plates, and discloses a battery liquid cooling plate flow channel design and optimization method based on topological optimization, and the method comprises the following steps: S1, constructing an initial geometric model of a battery liquid cooling plate: collecting the actual installation space size of a target battery pack, the distribution position of an internal heating element, and the overall heat dissipation demand parameters; according to the method, in the initial model building stage, namely, the battery pack installation space, heating element distribution and heat dissipation requirements are deeply collected, the heat dissipation efficiency maximization target of topological optimization is combined, a high-heating area can be accurately covered with a flow channel, the problem that traditional flow channels are evenly distributed but local heat dissipation is insufficient is solved, and the heat dissipation efficiency of a battery pack is improved through flow field and temperature field simulation. The liquid cooling plate can ensure that the wall temperature of the liquid cooling plate is always lower than the safety working upper limit of the battery, effectively inhibits the performance degradation or safety risk caused by local overheating of the battery, is especially suitable for a high-power-density battery pack, and prolongs the cycle life of the battery.

The invention relates to a built-in water channel-free power supply module based on a top heat dissipation device and an assembly process. The built-in water channel-free power supply module comprises a heat dissipation plate, a plurality of PCBA (Printed Circuit Board Assembly) plates and a plurality of heat conduction pieces, through the staggered stacking design between the heat dissipation plate and the PCBA plate, the PCBA plate comprises the power module plate, and the power semiconductor of the power module plate adopts top heat dissipation packaging, so that the size is effectively reduced and the power density is improved while effective heat dissipation is realized; the heat dissipation plate is provided with the plurality of profiling grooves and the plurality of profiling bosses, the PCBA plate comprises the plurality of heating components, the heating components abut against the bottoms of the profiling grooves or the upper surfaces of the profiling bosses through the heat conduction pieces, and the heating components transmit heat to the heat dissipation plate through the heat conduction pieces. The bottom of the heat dissipation plate abuts against an external high heat dissipation device after being polished to be smooth, so that efficient heat dissipation is achieved, a built-in water channel is omitted, the sealing technology is omitted, the technology is effectively simplified, cost is reduced, and meanwhile the risk of liquid leakage is fundamentally avoided.