1492 results about "Constant current" patented technology

The invention relates to a fragmented charging data-based lithium ion battery health state estimation method, which comprises the following steps of: acquiring voltage, current and timestamp original data of a constant current charging stage of a lithium ion battery, and intercepting a 100-600-second standardized fragmented charging fragment based on a window parameter consisting of an initial voltage threshold Vstart, a sampling interval delta t and a sampling point number n; the method comprises the following steps: calculating an accumulated charging capacity through a coulomb counting method, generating a voltage-capacity curve, deducing a capacity increment-voltage curve and a voltage increment-capacity curve, and carrying out smooth filtering, multi-modal data splicing and normalization processing to obtain a 3 * n multi-channel characteristic tensor; according to the method, complete charging and discharging data are not needed, different battery types and complex working conditions are adapted, the lowest SOH estimation root-mean-square error can reach 0.00355, the highest determination coefficient (R) can reach 0.99485, and the practicability and estimation efficiency in practical application are greatly improved.

The invention discloses an electric vehicle charging curve generation method and system, and the method comprises the steps: decomposing a noisy charging power curve into a plurality of overlapped Patches of different scales, so as to represent the transient impact of a charging start-stop stage and the steady state trend of a constant-current charging stage; the diffusion step length and the Patch center moment are coded through rotation position coding, and physical constraints on the absolute time power grid side are guided to a curve generation process through feature layer injection; a Transform backbone network is adopted to capture a long-time-sequence physical dependency relationship in the charging behavior; a power value and a reconstruction weight are respectively predicted through a double-path prediction head, and a generated curve is physically continuous and smooth by using weighted overlapping addition based on Softmax. According to the method, the problems of splicing artifacts and unreasonable time logic existing in charging curve generation are solved, and the high-fidelity charging curve with physical significance can be generated.

The invention provides a multi-path self-adaptive constant-voltage constant-current charging device, and the device comprises an input module which comprises a plurality of paths of input power supplies with the same rated voltage and limited power; the summarizing module is connected with each path of input power supply and combines the input power supplies into a single path for output; the conversion module is connected with the gathering module and is used for converting the single-path output voltage into target voltage and realizing constant-voltage output through a feedback loop; the detection module is connected with the input module and is used for detecting the effective path number of the input power supply and outputting a signal; and the control module dynamically adjusts the gain of the amplification circuit according to the output signal, and realizes constant current output by combining the current feedback of the conversion module. The summarizing module solves the problems of cost and size; the detection module and the control module jointly improve efficiency and stability; and meanwhile, a dynamic adjusting mechanism of the control module ensures constant-voltage and constant-current output under different input conditions. The modules operate cooperatively, so that the charging device is superior to the prior art in expansibility, efficiency and stability.

The invention relates to a method and equipment for improving pole piece wrinkles and a storage medium, and relates to the technical field of batteries, the method for improving pole piece wrinkles comprises the following steps: obtaining a group margin of a formed battery, and performing constant-current discharge on the formed battery to a discharge cut-off voltage; according to the group margin, dividing the charge state interval of 0-X into n sub-intervals; under the nth preset current I < n >, mn times of constant-current charging and discharging cycles are carried out in the nth sub-interval, the nth sub-interval is (SOC < n-1 >, SOC < n >], and SOC < n > is X. According to the method and the equipment for improving the wrinkles of the pole piece and the storage medium, the problem of easy wrinkles in the charging process of the battery cell pole piece can be improved, and the performance and the safety of the battery cell are improved.

A measurement apparatus detects a voltage change in a power storage device. The measurement apparatus supplies constant current to the power storage device; measures voltage related to the power storage device supplied with the constant current; and detects the voltage change in the power storage device subjected to the measurement. The measurement apparatus also acquires the voltage change in the power storage device based on an electrical property serving as a reference of the power storage device.

The invention relates to the technical field of robot intelligent actuators, and discloses a magneto-rheological end effector accurate grasping system based on force feedback, which comprises a multi-curved-surface bionic fingertip formed by a magneto-rheological elastomer, and a three-dimensional distributed excitation coil array is embedded in the fingertip. The coil array is excited by a high-frequency chopping constant-current driving module to generate a space gradient magnetic field, and the magnetic field changes the shear modulus of the elastomer within millisecond-level time, so that the fingertip surface hardness jumps in real time along with a control instruction; and the force feedback closed-loop control unit comprises an ultrathin film strain sensing net attached to the inner curved surface of the fingertip. Through time-sharing switching of a negative pressure micropore adsorption layer and a magneto-rheological rigidity keeping mode, traditional adsorption and rigid clamping are changed into a pre-fixing and rigidity gradual change two-section type process, instantaneous force impact during adsorption release is eliminated, meanwhile, thin film wrinkling caused by continuous negative pressure is avoided, and it is ensured that an ultrathin and high-added-value workpiece is kept flat and traceless in the whole transfer process.

The utility model provides a pre-charging circuit and an energy storage power supply. The pre-charging circuit comprises a constant current driving module, a pre-charging switch module, a power supply switch module and a voltage conversion module; the constant current driving module is respectively connected with the pre-charging switch module and the photovoltaic power supply, the pre-charging switch module is also connected with the voltage conversion module, and the power supply switch module is respectively connected with the photovoltaic power supply and the voltage conversion module; the constant-current driving module is used for outputting a constant-current signal when the input voltage of the photovoltaic power supply is greater than or equal to a first preset voltage so as to drive the pre-charging switch module to work, so that the photovoltaic power supply pre-charges a capacitor in the voltage conversion module through the pre-charging switch module; the power supply switch module is used for conducting when the voltage of the capacitor is greater than a preset value, so that the photovoltaic power supply supplies power to the voltage conversion module through the power supply switch module. According to the circuit, the surge current at the initial stage of capacitor charging can be reduced, meanwhile, smooth transition from pre-charging to normal power supply can be achieved, and the safety and stability of the circuit are improved.

The invention provides an LED constant-current driving chip and a display system, and relates to the field of display. The LED constant current driving chip comprises a line feed signal generation module, a display data cache module, a display control module and a constant current driving module. The line feed signal generation module is used for resetting in response to the received frame synchronization signal, and counting or timing based on the frame synchronization signal and a line feed period so as to periodically output a line feed signal; the display data caching module is used for caching the input display data; the display control module is used for generating a PWM (Pulse Width Modulation) signal according to the line feed signal and the display data read from the display data cache module; and the constant current driving module outputs a constant current driving signal based on the PWM signal so as to drive a corresponding LED lamp bead to emit light. The LED constant-current driving chip provided by the invention can output the line feed signal under the condition of no ROW line, so that the wiring is simplified, and the port utilization rate is improved.

The invention discloses a capacitor multi-stage adaptive flexible aging test method and system, and belongs to the technical field of industrial process advanced control. According to the method, voltage, current and temperature response data in the aging process of the capacitor are collected in real time by defining charging and discharging time sequences and initial parameters of four stages of preheating, constant current, constant voltage and resting; and comparing real-time data based on a preset model (an internal resistance change rate model and a temperature rise curve model), and dynamically adjusting power supply parameters in the next stage or triggering a protection mechanism. According to the method, the overstress or understress problem of a traditional fixed parameter test is solved, intelligent and personalized control of the aging process is realized, the test accuracy and the capacitor reliability are improved, and the method is suitable for aging test scenes of various capacitors.

The invention discloses a carbon felt electrode for a zinc-bromine flow battery as well as a preparation method and application, and belongs to the technical field of zinc-bromine flow battery production, the method comprises the following steps: immersing a carbon felt into an acid solution for chemical etching, etching uniform grooves in the carbon fiber surface of the carbon felt, cleaning and drying to obtain a pretreated carbon felt; the preparation method comprises the following steps: dissolving tin salt and nickel salt in deionized water, and adding a hydrolysis inhibitor to obtain a precursor solution; and immersing the pretreated carbon felt into the precursor solution, carrying out electro-deposition under constant current by adopting a direct-current power supply by taking the re-selected untreated carbon felt as a counter electrode, washing the pretreated carbon felt subjected to electro-deposition with water, and drying for the second time to obtain the carbon felt electrode for the zinc-bromine flow battery. By utilizing the zinc affinity of Sn and Ni, zinc is preferentially deposited on Sn and Ni sites of the carbon felt electrode, the deposition depth is obviously enlarged, the zinc deposition space is optimized, the zinc deposition area capacity is effectively improved, and the problem that the surface capacity of the carbon felt electrode is limited is solved.

The invention relates to the technical field of computers, and discloses a power battery SOH prediction method based on big data. The method comprises the following steps: acquiring voltage, current and temperature time sequence data in a battery charging process; intercepting a constant current charging segment and generating a two-dimensional time sequence spectrogram through continuous wavelet transform; constructing a multi-task attention deep convolutional network, performing decoupling quantization on three attenuation mechanisms of lithium ion precipitation, active substance loss and internal resistance increase, and outputting quantization vectors of the attenuation mechanisms; and finally, calculating an SOH value through a comprehensive evaluation model with physical significance. According to the method, the unification of end-to-end self-learning, strong noise immunity and high interpretability is realized, and the SOH prediction precision and practicability are improved.

The invention discloses a weak magnetic field synchronous measurement device and a weak magnetic field synchronous measurement system, and the device comprises a signal generator which is used for outputting a first AC constant current power supply and a second AC constant current power supply; the reference magnetic field generation device is electrically connected with the signal generator, and the reference magnetic field generation device is used for being connected with a direct-current constant-current power supply and a first alternating-current constant-current power supply to generate a reference magnetic field; the magnetic field detection device is electrically connected with the signal generator, and the magnetic field detection device is used for being driven by a second alternating-current constant-current power supply, detecting a reference magnetic field and outputting a reference magnetic field detection signal; and the signal demodulating device is electrically connected with the magnetic field detection device, the signal demodulating device is used for demodulating the reference magnetic field detection signal to obtain a reference signal and outputting the amplitude and phase of the reference signal on a first reference frequency and a second reference frequency, and the second reference frequency is twice of the first reference frequency. According to the invention, a complex magnetic field formed by superposing a steady magnetic field and an alternating magnetic field can be measured.

The invention discloses a charging management circuit and a charger. The charging management circuit comprises a flyback converter, a first sampling feedback module, a second sampling feedback module and an optocoupler. The first sampling feedback module comprises a comparator, a first switch unit, a thermosensitive voltage dividing unit and a current sampling resistor. The duty ratio of a PWM chip is controlled through an optocoupler to achieve constant-current charging in the first charging stage. The resistance of the thermosensitive voltage dividing unit is increased when the temperature rises, the charging current is automatically reduced, and temperature self-adaptive protection is achieved. And when the charging current is reduced to a preset value, the second sampling feedback module takes over the control optocoupler to realize constant-voltage charging in a second charging stage. Constant-current and constant-voltage two-stage charging can be achieved, the function of automatically adjusting the charging current through the temperature is achieved, the charger is effectively prevented from being overheated in the high-temperature environment, and the safety of the charger and a battery is protected.

The invention provides a charging system with high-voltage protection, which relates to the technical field of elevator emergency power supply and comprises a transformer, a voltage stabilizing circuit, a sampling circuit, an on-off circuit, a surge protection circuit, a constant current and voltage stabilizing circuit and a control circuit. The transformer reduces commercial power high voltage to low voltage; the voltage stabilizing circuit provides a stable direct-current power supply for the sampling and control circuit; the sampling circuit is used for conditioning the AC voltage and outputting a feedback signal; and the control circuit performs mode analysis by utilizing a pre-judgment algorithm according to the feedback signal so as to control the on-off circuit to cut off the mains supply input or switch the output mode of the constant current and voltage stabilizing circuit. Through an intelligent protection mechanism comprising sampling, control and on-off circuits, the device can be suitable for single-phase electric equipment, and quick and accurate response to abnormal high voltage is realized. And the transformer is adopted for voltage conversion and isolation, and the surge protection circuit and the on-off circuit are combined, so that the protection performance is ensured, and the overall cost and size of the system are effectively controlled.

A battery management system includes a sensing unit to generate a sensing signal indicating a battery voltage and a battery current of a battery, a memory unit to store a charge map recording a correlation between first to nth reference state of charge (SOC) ranges, first to nth reference currents and first to nth reference voltages for multi-stage constant-current charging, and a control unit to change to constant voltage charging using a kth reference voltage corresponding to a kth reference SOC range in response to the battery voltage having reached the kth reference voltage during constant current charging using a kth reference current corresponding to the kth reference SOC range to which an SOC of the battery belongs. The control unit updates the kth reference current of the charge map based on a time-series of the battery current in a charging period of the constant voltage charging.

Methods, systems, and devices are disclosed for generating a battery charging signal. A method includes generating an initial waveform having a voltage curve and a current curve, wherein the initial waveform includes a leading edge portion characterized by a leading edge parameter, a body portion characterized by a body parameter, and a rest portion characterized by a rest parameter. By comparing leading edge phase shifts and body phase shifts to leading edge thresholds and body thresholds, an adjusted leading edge, body, and rest parameters may be determined and saved for use in generating subsequent waveforms. A method of charging a battery includes charging a battery using a constant current mode, probing the battery with a probing signal and receiving a response signal from the battery, determining a resonance frequency from the response signal, and constructing a charging waveform based on the resonance frequency.

The invention discloses a control method of a hemorrhoid electrolytic treatment device, and belongs to the technical field of electrolytic treatment, a main control unit receives treatment parameters such as female hemorrhoid diameter or hemorrhoid size and grade, calls a treatment parameter set established based on clinical / experimental data from a memory, determines target output current and treatment time in a range of 0-50mA, and sends the target output current and treatment time to a control unit; the constant-current output module is controlled to output direct-current treatment current; output current and voltage are collected in real time through a current detection module, load impedance is calculated, and protection is triggered when the load impedance is abnormal; meanwhile, discrete integration is carried out on the actual output current to obtain accumulated treatment charge quantity, and when a target charge quantity threshold value is reached, treatment is automatically terminated, and treatment data are recorded. According to the invention, high-precision constant-current control and quantitative management based on total charge quantity in the hemorrhoid electrolytic treatment process are realized, and the treatment efficiency and repeatability are improved on the premise of ensuring safety.

The invention provides a battery charging control method and device, a medium and a product, and relates to the technical field of battery management, and the method comprises the steps: collecting the voltage, current and temperature of a target cell in a constant current charging stage, and calculating the dynamic DC internal resistance and internal resistance growth rate. And determining a basic lithium precipitation boundary voltage according to the temperature, and correcting by using an internal resistance growth rate to obtain a lithium precipitation upper-limit terminal voltage value. And determining a current open-circuit voltage value by looking up a table based on the charge state, the temperature and the internal resistance growth rate. And calculating the maximum charging current value by combining the lithium precipitation upper limit terminal voltage value, the current open-circuit voltage value and the dynamic direct-current internal resistance value. And when the real-time charging current is greater than the maximum charging current, calculating a difference value as an adjusting current value, and converting the adjusting current value into a PWM signal to drive the target bypass shunt circuit to shunt. According to the scheme, the technical problem that an existing charging control strategy is difficult to adapt to physical characteristic changes in the whole life cycle of the battery is solved.

A positive electrode active material that enables an increased discharge capacity retention rate of cycling performance is provided. A secondary battery includes a positive electrode pressed under a linear pressure higher than or equal to 100 kN / m and lower than or equal to 3000 kN / m and a negative electrode. When a test battery that includes the positive electrode and a negative electrode containing lithium undergoes, in an environment at higher than or equal to 25° C. and lower than or equal to 45° C., a cycling test of 50 repetitions of a cycle of charging and discharging in which, after constant current charging is performed at a charge rate of 0.5 C (1 C=200 mA / g) until a voltage of 4.7 V is reached, constant voltage charging is performed until the charge rate reaches 0.05 C at a voltage of 4.7 V, and then constant current discharging is performed at a discharge rate of 0.5 C until a voltage of 2.5 V is reached, and the discharge capacity of the battery is measured in each cycle, a discharge capacity value measured in the 50th cycle is greater than or equal to 35% and less than 100% of the maximum discharge capacity value in all the 50 cycles.

The invention discloses a PT100 temperature measurement circuit and method for multi-gear current fitting resistance measurement and ADC online calibration. In order to solve the problem that a PT100 precise temperature measurement system does not have the self-checking capability, an ADC calibration reference resistance network formed by a plurality of precise resistors is utilized, a plurality of reference voltage points are provided, gain drift, offset change and linear deviation can be detected in real time and compensated, and online self-calibration and state monitoring of an ADC in the whole experiment process are achieved. Through error compensation, the overall error is reduced by about 70%. For a PT100 precision temperature measurement system, a fixed current value is usually adopted to measure the resistance, which is easy to interfere; and due to the influence of self-heating factors, the finally measured resistance value is not accurate, and the like. According to the method, multi-gear constant current excitation and a least square resistance fitting method are combined, noise and nonlinear errors are effectively restrained, the resistance measurement precision and the temperature measurement precision of PT100 are greatly improved, and the temperature deviation is controlled within the range of + / -0.03 DEG C to 0.04 DEG C.

A method of preparing 2-hydroxyadpic acid and adipic acid is provided. The method of preparing 2-hydroxyadpic acid and adipic acid comprises a step of the electrolysis of 2,5-furandicarboxylic acid using a metal electrode at a constant current in a sulfuric acid solution containing a quaternary ammonium salt. The metal electrode is a bismuth electrode or a lead electrode. The quaternary ammonium salt is represented by formula (I):wherein R1 to R4 are independently a C2-5 hydrocarbon group, and X− is ClO4−, H2PO4−, or Br−.

The invention relates to the technical field of LED lighting control, and discloses an intelligent LED lamp strip power supply control system with an automatic voltage jump function, which comprises an intelligent control power supply, a series topology LED lamp strip and a plurality of cascaded constant current voltage division control chips, and further comprises a topology discovery and automatic addressing module for detecting the total node number and allocating addresses; the cascade voltage division and dynamic power consumption balancing module is used for calculating a target voltage division value according to the total node number; the power and data cooperative transmission module broadcasts a target partial voltage value on a power supply bus and realizes two-way communication; the node localization constant-current driving module is used for the chip to receive the target voltage division value, adjust the actual voltage division value and drive the LED in a constant-current mode; and the intelligent fault diagnosis and controllable bypass module is used for monitoring a fault of the chip, reporting a fault containing an address and responding to an instruction to activate a bypass. According to the invention, the cascade voltage division and dynamic power consumption equalization module is adopted, so that the technical effects of consistent power and highly uniform brightness obtained by all LED nodes in an ultra-long distance are achieved.

The application discloses an amorphous silicon dioxide coating prepared based on micro-arc oxidation, a preparation method and application thereof, and belongs to the technical field of metal surface protection and silicon dioxide coating. In the application, a magnesium alloy, an aluminum alloy, a titanium alloy, a titanium-aluminum base and a nickel-aluminum base are used as anodes and are placed in a micro-arc oxidation tank, a hydrolytic solution of organic silicon is used as an electrolyte, and an amorphous silicon dioxide coating with a thickness of more than 100 mu m can be prepared within 20 minutes through a step-by-step step-incremental constant potential control means. The application utilizes the advantages of the micro-arc oxidation process and the sol-gel process, avoids their shortcomings, and realizes the superimposed synergistic effect of "1+1>2". The process steps of the application are simple, and the application is very suitable for full-automatic operation and processing in industry. The amorphous silicon dioxide coating with the required thickness, wear resistance, corrosion resistance, erosion resistance, oxidation resistance and other characteristics can be prepared by changing the electrolyte concentration, the micro-arc oxidation time and the electric control parameters, or through the conventional micro-arc oxidation constant voltage and constant current control means.

A method of performing fast-charging for a lithium-ion battery (LIB) includes sensing an environmental temperature, performing an initial constant-current charging and subsequent discharge of the LIB, and evaluating whether the sensed environmental temperature falls below a threshold temperature. If the sensed environmental temperature initially falls below a threshold temperature, the LIB is charged via a dynamic alternating current (AC) charging according to a low-temperature charging algorithm to heat and charge the lithium-ion battery. Once the LIB reaches a temperature below the threshold temperature, charging switches to a comparatively high-temperature charging algorithm.

The present invention relates to the technical field of wireless power transfer (WPT). Specifically disclosed is a WPT system for realizing constant current and constant voltage output on the basis of a variable-structure hybrid topology. A variable-structure hybrid topology is designed, wherein input ends of CLC-S-type and S-CLC-type topologies are connected in series, and output ends of the CLC-S-type and S-CLC-type topologies are connected in parallel to form a front-stage circuit which is mainly used for improving the system misalignment tolerance; on this basis, a variable-structure T-type compensation topology is incorporated at an output end to form a rear-stage T-type circuit, and constant-current / constant-voltage switching is achieved by changing the structure of the rear-stage T-type circuit. Moreover, in order to improve the system misalignment tolerance, a system compensation parameter is designed. Experiments have verified that the WPT system for realizing constant current and constant voltage output on the basis of a variable-structure hybrid topology provided by the present invention can realize constant-current / constant-voltage switching, and has high misalignment tolerance in both a constant voltage mode and a constant current mode.

The invention discloses a hybrid self-switching bidirectional wireless switched reluctance motor driving system provided and realized by the invention. An independent demagnetization loop is arranged on the motor side, rapid demagnetization is allowed, and energy recovery is achieved. The system wirelessly drives a multi-phase SRM through a single power transfer channel using a single resonant frequency to reduce coupling between multiple power channels. When the WPT system is in forward power, the LCC-S compensation network is adopted to drive the motor load, and the advantage of constant voltage gain when the load changes is achieved; the LCC-LCC / S hybrid self-switching compensation network is adopted to realize charging of a battery load, and has a constant voltage / constant current characteristic; and when the WPT system has negative power, the LCC-LCC compensation network is adopted to realize reverse recovery of energy, and energy interconnection between the motor and the power grid is realized. In addition, an SR motor does not need to be specially designed, and the system has the remarkable advantages of phase current balance, flexible transmission distance, high integration level, maintenance-free property and the like.

The invention provides an output voltage automatic regulation circuit and an illumination lamp, and the circuit comprises a constant voltage module which is used for converting an external alternating current into a constant voltage direct current; the linear constant current module is used for converting the constant voltage direct current into constant current; a voltage threshold value is set in the MCU control module, and the MCU control module is used for detecting the voltage to ground of the linear constant current module and outputting a PWM signal with a corresponding duty ratio according to a comparison result of the voltage to ground and the voltage threshold value; and the constant-voltage loop regulation module is connected in series between the MCU control module and the constant-voltage module and is used for receiving the PWM signal and carrying out voltage division and RC filtering on the PWM signal to obtain a processing voltage, and the processing voltage is used as a reference voltage of an operational amplifier in the constant-voltage loop regulation module. Compared with the prior art, the output voltage of the constant-voltage module can be intelligently and dynamically adjusted in real time, the loss of the linear constant-current module is reduced, and the purposes of improving the driving efficiency and reducing heating are achieved.

The application discloses a wireless charging circuit for a UAV, a movable electric energy carrier and the UAV. The circuit comprises an electric energy transmitting sub-circuit and an electric energy receiving sub-circuit, the electric energy carrier is configured to perform wireless charging on a power supply of the UAV through electric energy transmission between the electric energy transmitting sub-circuit and the electric energy receiving sub-circuit; the electric energy transmitting sub-circuit comprises a boost converter and a full-bridge inverter to control the operation efficiency of the wireless charging circuit; and the electric energy receiving sub-circuit comprises a receiving switch tube and a receiving diode arranged in series to control the wireless charging circuit to output electric energy at a constant voltage or a constant current to the power supply. The application can switch and adjust the charging mode for the UAV based on the control of the PWM signal on the basis of using the electric energy carrier to perform wireless charging on the UAV in real time, can maximize the operation efficiency of the whole wireless charging circuit and reduce the control complexity of the wireless charging circuit.

The application relates to a sodium ion battery, a pre-sodium method and device for a hard carbon negative electrode of the sodium ion battery, and belongs to the technical field of sodium ion batteries. The pre-sodium method comprises the following steps: S1, obtaining a hard carbon electrode; S2, assembling a pre-sodium battery under the protection of an inert atmosphere; S3, calculating a pre-sodium capacity; S4, discharging the pre-sodium battery by applying a constant current; S5, stopping discharging and standing the pre-sodium battery after the pre-sodium capacity reaches a predetermined value; and S6, taking out the hard carbon electrode, cleaning and drying the hard carbon electrode, and obtaining a pre-sodium hard carbon electrode. The sodium ion battery with the hard carbon negative electrode prepared by the method can solve the contradiction between the low capacity of a polyanion positive electrode material and the low first coulomb efficiency of the hard carbon negative electrode, has higher energy density and cycle stability, and is suitable for the large-scale production of various high-energy-density sodium ion batteries.

The present application relates to the field of electrical engineering, in particular to a kind of full DC power supply system suitable for pulse load characteristics.The system includes control unit, chassis engine, generator, rectifier unit, energy storage unit and distribution unit;Wherein, rectifier unit uses uncontrolled rectification+BUCK type step-down topology, and constant voltage control strategy, specifically: double-loop control mode of outer ring voltage control+inner ring current control, output DC 600V DC bus is stabilized at set voltage value, realizes the constant voltage control of output voltage.Solve the energy supply problem of equipment single vehicle operation, and the problem that traditional electric car system constant current strategy and equipment pulse load are difficult to match.Using the power supply structure of rectifier unit+energy storage unit (capacitor), remove lithium battery in traditional electric drive system, avoid the safety problem of lithium battery, and the system safety is high.