181results about How to "Improve power supply stability" patented technology

The invention relates to the technical field of electric power design, in particular to an intelligent dispatching system of a transformer area power supply grid. According to the method, a self-adaptive sampling strategy of real-time load fluctuation and distributed energy output characteristics is adopted; when the system detects the rapid change or abnormal fluctuation of the load, the data acquisition frequency is automatically improved, so that the capture of key information is ensured; when the load is stable, the sampling frequency is reduced, and the collection of redundant data is reduced; adaptive sampling can dynamically adjust the acquisition frequency, it is guaranteed that important data are not lost at the critical moment, and meanwhile the system burden is reduced; a hierarchical data processing architecture is adopted, data processing is divided into an edge layer and a cloud layer, the edge layer is responsible for conducting primary processing on data collected in a transformer area, including denoising, feature extraction and the like, and the data quality is guaranteed; only the key data subjected to primary processing is uploaded to a cloud end for data analysis and decision optimization; therefore, the burden of data transmission and processing is reduced, and the real-time response capability of the scheduling system is improved.

The invention discloses a power distribution station high-temperature alarm system and a processing device, and relates to the technical field of high-temperature alarm, and the system comprises a sensor deployment and control module, a dynamic threshold discrimination module, a hierarchical linkage disposal plan library and a disposal backtracking monitoring module. The sensor deploying and controlling module is used for constructing a three-dimensional model of the power distribution station through laser scanning and photogrammetry; according to the invention, the three-dimensional model of the power distribution station is constructed by using the laser scanning and photogrammetry technology through the sensor deployment and control module, the heating part of the equipment is accurately analyzed, and the installation feasibility and accessibility of the sensor are evaluated, so that the reasonable layout of the sensor is realized, the comprehensiveness of temperature monitoring is improved, and the accurate temperature measurement of key parts is ensured; in addition, through a dynamic threshold value judgment module, a deep learning algorithm is combined with transfer learning and generative adversarial network technologies, the limitation of a fixed threshold value is broken through, temperature abnormity is judged more accurately, tiny faults are positioned more accurately, and the situations of false alarm and missing report are effectively reduced.

The invention relates to the technical field of distribution network planning, and provides a distribution network planning index prediction method based on artificial intelligence, which combines three models to establish a multi-level model, and significantly improves the accuracy and efficiency of distribution network planning index prediction. The main trend and influence factors of distribution network planning are identified by using a multi-layer sensor (MLP), and the nonlinear modeling capability is provided. The time dependence and periodic change of data are captured through a time sequence model ARIMA, and the sensitivity to short-term fluctuation is ensured. A long short-term memory (LSTM) network captures a complex non-linear relationship and long-term dependence, and the prediction precision is further improved. And finally, through a Blending technology, weighted summation is carried out on prediction results of the models, so that maximum output of model advantages is realized, and the accuracy of a fusion result is optimized. Model parameters are dynamically adjusted through a real-time data flow mechanism and an adaptive learning algorithm. Therefore, the prediction is real-time, the method can adapt to continuously changing market and environment conditions, and high prediction precision is kept.

The invention discloses an energy storage capacity configuration method for a wind and light power generation system, and relates to the technical field of energy storage capacity optimization planning, and the method comprises the following steps: obtaining the average wind power and photovoltaic output data of an optimized region, and calculating the target output power of the wind and light power generation system; based on the target output power and the actual output power of the wind and light storage power generation system, calculating the energy storage capacity required to be configured by the wind and light storage power generation system; establishing a minimum cost objective function model of the wind-solar-energy-storage combined power generation system and setting an index constraint condition of output of the wind-solar-energy-storage combined power generation system; and obtaining an optimal energy storage capacity scheme of the wind-solar-energy-storage combined power generation system based on the minimum cost objective function model of the wind-solar-energy-storage combined power generation system and the output index constraint condition of the wind-solar-energy-storage combined power generation system, thereby solving the problem that a traditional energy storage capacity configuration method cannot configure more accurate energy storage capacity to better meet the requirements of the system. And the energy storage capacity optimization planning of the wind and light power generation system is realized.

The invention relates to the technical field of power management, in particular to a UPS parallel management method, device and system and a computer storage medium. When it is detected that a power grid power source is in an abnormal state, a UPS cluster formed by connecting multiple UPSs in parallel is started so that the UPS cluster can supply power to a target object, performance parameters of each UPS in the UPS cluster and the number of the UPSs in the UPS cluster are determined, and after the target load size of the target object is predicted based on the historical load size of the target object, the power grid power source is determined to be in the abnormal state. And according to the performance parameter of each UPS and the number of the UPSs, the target load is distributed to each UPS in the UPS cluster, so that each UPS in the UPS cluster supplies power to the target object, and the power supply efficiency of the UPSs is improved.

The invention relates to the technical field of power distribution network regulation and control, in particular to a power distribution network intelligent regulation and control system for high and low voltage power transmission, comprising a global optimization layer module which is responsible for global regulation and control of the whole power distribution network and comprises a global data acquisition unit, a global data processing unit and a global control unit; the regional optimization layer module is used for performing intra-regional optimization regulation and control on the plurality of divided regions according to geographic distribution and load characteristics of the power distribution network, and the regional optimization layer module comprises a plurality of regional data acquisition units, a regional data processing unit and a regional control unit; and the adaptive learning module adaptively optimizes global and regional regulation and control strategies through a machine learning algorithm according to historical data and real-time data in operation of the power distribution network, and the adaptive learning module comprises a data training unit and a model updating unit. According to the invention, the multi-level regulation and control mode can effectively reduce the power loss in the region, and improves the overall operation efficiency of the power grid.

The invention relates to the field of power system monitoring and management, and particularly discloses an intelligent power monitoring and management system, which evaluates the operation performance of a power supply and distribution system in various power supply modes by acquiring operation information of the power supply and distribution system in a mains supply mode, an uninterruptible power supply mode and an emergency generator power supply mode in a data center. Potential fault hidden dangers of various power supply modes of the power supply and distribution system can be found in time, and maintenance measures are taken in advance; the action duration, the voltage transient amplitude, the frequency transient amplitude and the switching success rate of switching between the power supply modes of the power supply and distribution system of the data center are collected, the performance of switching between the power supply modes of the power supply and distribution system is evaluated, then it is ensured that the power supply and distribution system can be rapidly and stably switched under different power supply conditions, and the continuity of power supply is guaranteed; the performance health condition of the power supply and distribution system is comprehensively evaluated by combining the independent operation and coordinated operation performance of the power supply and distribution system, so that the reliable operation of the power supply and distribution system is ensured.

The invention relates to the technical field of power distribution systems, in particular to a power distribution system operation fault monitoring and predicting system which comprises a data acquisition module used for acquiring operation data of a power distribution system in real time; the data processing module is used for preprocessing, storing and transmitting the data acquired by the data acquisition module; the fault detection and prediction module is used for monitoring the operation state of the power distribution system in real time, detecting abnormal conditions and predicting potential faults; the user interface is used for man-machine interaction and displaying real-time data, historical data, alarm information and maintenance suggestions; the maintenance management module is used for making a management maintenance plan, recording maintenance information and evaluating a maintenance effect; early detection and prediction of faults are realized, and reliability and operation efficiency of a power distribution system are improved.

The embodiment of the invention discloses a medium-voltage line fault positioning method, device and system. The medium-voltage line fault positioning method comprises the following steps: acquiring a node state of a line monitoring node sent by each node monitoring device; wherein the node monitoring device is arranged in a distribution network line, and the node monitoring device is used for acquiring voltage and current of a line monitoring node, and determining impedance magnitude and impedance angle of the line monitoring node according to the voltage and current of the line monitoring node; determining the node state of the line monitoring node according to the impedance size and the impedance angle of the line monitoring node; and marking the node state of each line monitoring node in the wiring topological graph, and determining a line fault section according to a marking result. The method has the advantages of being accurate in fault positioning, small in calculation amount and capable of adapting to various forms of complex power grids.

The invention discloses a flexible load distribution and power supply optimization method and system, and relates to the technical field of electric power, and the method comprises the steps: collecting a load demand in an electricity utilization environment and the power supply capability of power supply equipment; carrying out first classification, and dividing the load into a multi-stage load set; based on the load demand and the power supply capability of the power supply equipment, solving a load distribution problem by using a dynamic programming algorithm; monitoring the operation state of a power utilization environment in real time, and adjusting a power supply strategy through a genetic algorithm; according to the invention, efficient matching of the load and the power supply resource is realized, the electric energy utilization rate and the power supply stability are remarkably improved, the energy waste and the unit power supply cost are reduced, the method is suitable for various complex power utilization environments, and the power supply mode is more intelligent and diversified.

The application relates to the technical field of image forming, in particular to a conductive component, a process cartridge and an image forming device. The conductive component is arranged on the process cartridge or the image forming device. The process cartridge is detachably mounted into the body of the image forming device. The mounting direction of the process cartridge is a first direction. The conductive component comprises: a plurality of conductive pieces, the conductive pieces are used for realizing the electrical connection between the power supply piece of the image forming device and the load piece of the process cartridge, and at least one load piece comprises a roller piece; the conductive piece comprises an electric contact point, the electric contact point is used for contacting the power supply piece to access the power supply; wherein at least two of the plurality of electric contact points are arranged at intervals along a second direction; the second direction intersects with a third direction and the first direction; and the third direction is parallel to the axial direction of the roller piece. In conclusion, the technical scheme provided by the application can reduce the number of electric contact point scratches and improve the power supply stability.

The invention provides a wind-solar hybrid power generation system with a tower structure, which comprises a tower frame used for bearing and fixing the whole wind-solar hybrid power generation system; the wind driven generator is fixedly mounted at the top of the tower; the photovoltaic module is mounted on the side surface of the tower frame; and the wind-solar complementary controller is electrically connected with the wind driven generator and the photovoltaic module, and is used for controlling the wind driven generator and the photovoltaic module at the same time, and distributing and combining the wind driven generator and the photovoltaic module to supply power to a load according to different changes of weather conditions, wind power and sunlight. According to the power generation system, a wind driven generator and a photovoltaic solar panel are combined in a tower form, so that the photovoltaic utilization rate of a unit area is improved; wind energy and solar energy are used for complementary power generation, conventional energy is saved, environmental pollution is reduced, and the requirements for carbon saving, emission reduction and environmental protection are met.

The invention discloses a multichannel power supply switching electric quantity acquisition system, which belongs to the technical field of standby power supply switching and comprises a storage battery, a mains supply end, a first intelligent switcher and a second intelligent switcher. The device further comprises a solar panel, the output end of the solar panel is electrically connected with a solar controller, the solar controller is electrically connected to the first input end of the first intelligent switcher, and the output end of the first intelligent switcher is electrically connected to the storage battery. The output end of the storage battery is electrically connected to the first input end of the second intelligent switcher, and the output end of the second intelligent switcher is electrically connected to the terminal through the main control board; the first output end of the mains supply end is electrically connected to the second input end of the second intelligent switcher through an inverter. The system has the advantage of seamlessly switching the commercial power and the storage battery.

The invention discloses a fuel switching method and system, relates to the technical field of fuel power generation, and can improve the power supply stability and the operation safety of a power supply unit. The method is applied to a fuel switching system, the system comprises a reciprocating supercharger, a buffer tank set and a gas turbine, a natural gas pipeline is connected with the reciprocating supercharger, the reciprocating supercharger is connected with the buffer tank set, the buffer tank set is connected with the gas turbine, and natural gas is contained in the buffer tank set; the method comprises the steps that after a fuel switching instruction is received, natural gas in a buffer tank set is controlled to be input into a gas turbine, so that the gas turbine completes fuel switching through the natural gas output by the buffer tank set; and when it is detected that the pressure of the buffer tank set is smaller than the preset pressure, natural gas in the natural gas pipeline is filled into the buffer tank set through the reciprocating supercharger till the pressure of the buffer tank set reaches the preset pressure.

The invention discloses a low-voltage distribution area fault detection method, device and equipment and a storage medium, which can more accurately identify and position faults and reduce the situations of false report and missing report. The method comprises the following steps: constructing a to-be-predicted feature set; inputting the to-be-predicted feature set into the feeder line detection model to enable the feeder line detection model to output a prediction result; when the prediction result indicates that the fault feeder exists, inputting the to-be-predicted feature set to a branch detection model, so that the branch detection model outputs a fault branch set; inputting the fault branch set into a category detection model, so that the category detection model determines a corresponding fault category for each fault branch and outputs the fault category; inputting each fault branch included in the fault branch set into a distance detection model, so that the distance detection model calculates a fault relative distance corresponding to each fault branch according to the fault point position of each fault branch and outputs the fault relative distance; and generating fault early warning information according to the fault scene and the fault relative distance corresponding to each fault branch.

The invention provides equipment with a position detection function, a robot and a position detection method. The equipment comprises a control module and a power supply module, a permanent magnet synchronous motor, a motor output shaft and a reducer; when the equipment is in a power-off state, the control module is started in response to phase voltage generated by the permanent magnet synchronous motor, and the power supply module is controlled to supply power to the control module and the absolute value encoder for a period of time; and determining the position of the output end of the speed reducer according to the position data reported by the absolute value encoder and the latest number of turns. The energy consumption of the power supply module can be reduced to the greatest extent, the endurance of an internal battery is prolonged, energy and power are saved as much as possible, the power supply starting time is responded based on the phase voltage, the phase voltage is directly generated and output by the permanent magnet synchronous motor due to position change, and the phase voltage does not need to be processed by an intermediate logic circuit, so that the power supply starting time is shortened. The response speed is high, the situation that position data are lost due to the fact that power supply is not started in time is avoided, and power supply stability and reliability are higher.

The invention discloses a multi-voltage inverter welding machine control circuit power supply method and an inverter welding machine, relates to the technical field of welding, and designs a power supply circuit, a driving circuit, an inverter circuit and a power supply transformer which are connected in sequence. Rectifying and filtering, BUCK voltage reduction and BUCK-BOOST conversion are sequentially carried out on the low-voltage alternating current to generate stable positive and negative power supply voltage to supply power to the driving circuit; a driving circuit is utilized, a PWM control strategy based on phase shift driving is adopted to drive an inverter circuit to operate, and the inverter circuit converts stable direct current in a main loop of the multi-voltage inverter welding machine into stable alternating current according to the PWM control strategy; the converted stable alternating current is connected to the primary side of the power transformer, and the secondary side of the power transformer supplies power to a control circuit and auxiliary tools of the multi-voltage inverter welding machine. According to the invention, only one power supply circuit is additionally arranged, so that stable power supply for the multi-voltage inverter welding machine is realized.

The invention discloses a digital intelligent configuration method and device of a power distribution system and a medium, and relates to the technical field of electrical engineering, and the method comprises the steps: obtaining scene information of the power distribution system through interaction, and the scene information comprises demand and operation information; and based on this, power distribution model optimization is carried out, and an intelligent configuration cloud comprising K equipment models and K gateways is constructed. A power distribution equipment entity is in communication connection with a gateway, the gateway receives and forwards equipment real-time operation information to a cloud end, the cloud end analyzes and generates a parameter adjustment instruction, and the parameter adjustment instruction is transmitted to a power distribution system through the gateway to execute intelligent configuration. The technical problems of low energy utilization efficiency, poor power supply stability and lack of intelligent collaboration and optimization caused by the fact that existing power distribution system configuration cannot accurately adapt to variable power distribution scene requirements and operation conditions in real time are solved, and the purposes of improving the energy utilization efficiency and the power supply stability and reliability, reducing the operation and maintenance cost and improving the power supply efficiency are achieved. And the automation and intelligence level of the system is enhanced.

The invention relates to an electromagnetic energy harvesting type nonlinear variable damping shock absorber and a control method thereof. The electromagnetic energy harvesting type nonlinear variable damping shock absorber comprises a box body (1), a spring-mass damping mechanism (2) and an electromagnetic energy harvesting mechanism (3). The spring-mass damping mechanism (2) comprises a mass block (21) arranged on the guide rail (22) in a sliding mode, a nonlinear spring (23) arranged perpendicular to the movement direction of the mass block (21) and a linear spring (24) arranged parallel to the movement direction of the mass block (21). The electromagnetic energy harvesting mechanism (3) comprises a permanent magnet (31) and a coil (32) used for generating current when the permanent magnet (31) rotates. And a transmission mechanism (4) capable of converting translation of the mass block (21) into rotation of the permanent magnet (31) is arranged between the spring-mass damping mechanism (1) and the electromagnetic energy harvesting mechanism (2). Compared with the prior art, by controlling the resistance value change of the variable resistor (52), the balance between the vibration reduction performance and the energy harvesting efficiency of the system can be realized.

This disclosure presents an embodiment of a power supply device for a submarine data center. One specific embodiment of the power supply device includes a pre-stage voltage regulator / conversion component, a post-stage DC-DC converter component, and a combined protection circuit. The pre-stage voltage regulator / conversion component includes several parallel single-group voltage regulator branches, each branch connected in series with a varistor and a color-coded resistor. A thin-film capacitor is connected in parallel to the output terminal of the pre-stage voltage regulator / conversion component. The post-stage DC-DC converter component, electrically connected to the pre-stage voltage regulator / conversion component, includes at least two sets of full-bridge DC synchronous rectifier circuits. The combined protection circuit includes a pre-stage combined protection circuit, a post-stage active voltage clamping circuit connected in parallel to the output side of the post-stage DC-DC converter component, and a rectifier diode bridge connected between the constant current input port and the pre-stage voltage regulator / conversion component. The pre-stage combined protection circuit is connected in series to the input side of the rectifier diode bridge. By connecting multiple voltage regulator branches in parallel and combining them with the combined protection circuit, ripple is reduced. This embodiment can improve the power supply stability of the power supply device.

This utility model discloses a foldable electric stubble trimmer, belonging to the field of agricultural and livestock machinery. It includes a main frame with two symmetrical longitudinal beams and a main ground wheel below. A short beam is connected to the upper rear of the longitudinal beams via a rear pin and a front pin. A sub-frame is hinged to the outer side of the short beam. The sub-frame has casters below and a liftable motor frame above, with several motors arranged horizontally on the motor frame. A wire rope trimming head is installed at the lower end of the motor shaft. A generator provides power to the main frame. The sub-frame can be folded 90° and secured with a locking pin. This device has a compact structure, is portable, has high efficiency for wide-area operation, can follow contours and adjust the stubble height, reducing damage to pastures caused by trampling.

The utility model relates to a parallel MOS (Metal Oxide Semiconductor) tube driving circuit, which comprises a digital isolation unit, a negative voltage bias driving unit and a plurality of MOS tube driving units, and is characterized in that the negative voltage bias driving unit comprises a silicon carbide MOS tube driving chip U2 with the model of IVCR1401; the input end of the digital isolation unit is used for accessing a driving signal, the output end of the digital isolation unit is electrically connected with the logic input end of the silicon carbide MOS tube driving chip U2, and the driving output end of the silicon carbide MOS tube driving chip U2 is electrically connected with the input ends of the MOS tube driving units. The negative voltage output end of the silicon carbide MOS tube driving chip U2 is electrically connected with the input ends of the MOS tube driving units through the series capacitor C6, and the output ends of the MOS tube driving units are used for being connected with grid electrodes of MOS tubes. According to the utility model, the IVCR1401 silicon carbide MOS tube driving chip is utilized to provide driving signals for each MOS tube driving unit, so that the whole driving circuit has the functions of negative voltage turn-off, short circuit protection, fault output and the like.

This application discloses an auxiliary power supply module and a power distribution terminal, belonging to the field of power supply. The auxiliary power supply module includes a charging circuit, an energy storage unit, a power failure detection delay circuit, a boost circuit, and a power output terminal. The charging circuit is connected to the energy storage unit and is used to charge the energy storage unit using the main power supply voltage when the main power supply voltage is normal. The power failure detection delay circuit is connected to both the charging circuit and the boost circuit and is used to output a working voltage to the boost circuit when the main power supply voltage is less than a first target voltage for a target duration. The energy storage unit is connected to the boost circuit and is used to output a stored energy voltage to the boost circuit. The boost circuit is connected to the power output terminal and is used to supply power at the working voltage, converting the stored energy voltage into a supply voltage and providing it to the power output terminal. The supply voltage is used to power the power distribution terminal. This application can improve the service life of the auxiliary power supply module and improve the stability of power supply.

The application relates to the technical field of ocean exploration measurement, and discloses a Doppler log power supply control method and system based on hierarchical intelligent control, which comprises the following steps: acquiring and adaptively filtering original electrical and environmental signals by using a multi-parameter dynamic detection module; performing integration autoregressive moving average model identification based on load current sampling data by using a load adaptive adjustment module, and outputting predicted load current values; combining the prediction results to generate a feedforward instruction, so as to adjust the target switching frequency, duty cycle and working mode of a direct-current-to-direct-current conversion circuit; and using a stability verification layer to evaluate control loop indexes in real time based on a linear periodic time-varying Nyquist criterion, and sending an instruction change control parameter or a warning threshold at an instability critical point. The application improves the power conversion efficiency and dynamic response lag problem under a variable load environment, and improves the anti-disturbance capability and operation reliability of a Doppler log power supply system.

The utility model discloses a massage device of replaceable battery, include: massage device main part, the massage device main part one side embedded type installation changes the electricity box, sets up the battery in the electricity box, and the battery is detachable design, the utility model discloses a detachable battery design, supports double battery alternation and charges, realizes " one uses one fills " mode, improves the endurance time of massage device, thoroughly solves the pain point of equipment downtime during charging, also is convenient for the convenience of the repair problem of the maintenance problem of massage device battery problem, and the user can complete opening and closing only by pressing the box cover, and the auxiliary fixing of screw is combined, and the dismounting efficiency and structural stability are taken into account, avoid the tool dependence problem caused by traditional screw full fixation, the conductive plug and the electric socket adopt card type connection, cooperate the hole limit design, ensure the insertion accuracy, the contact resistance reduces, avoid the interface loosening caused by vibration simultaneously, and the power supply stability is obviously superior to the welding or ordinary insertion scheme.

The utility model relates to the technical field of USB (Universal Serial Bus) switching, in particular to a USB optical transmission switching matrix device, which comprises a first USB interface module, a second USB interface module, a first signal conversion module, a switching matrix module and a second signal conversion module, the switching matrix module comprises an interface change-over switch unit formed by a plurality of switches and a switch change-over control interface unit, and the switch change-over control interface unit is used for controlling each switch in the interface change-over switch unit so as to gate any channel between the master device and the slave device; the first signal conversion module and the second signal conversion module are used for converting transmission signals between the master device and the slave device. According to the scheme, long-distance optical transmission can be carried out on USB signals, channels can be freely switched, the operation steps are simplified, and the data transmission efficiency is improved.

The invention discloses a terminal power supply equipment state determination method and system, terminal power supply equipment and a medium, and the method comprises the steps: obtaining the operation data of the terminal power supply equipment, and initializing an abnormal identification bit and a protocol incompatible identification bit; wherein the operation data comprises voltage, current, temperature, residual capacity, internal resistance, protocol compatible information and smoke open fire information of the terminal power supply equipment; updating the abnormal identification bit and / or the protocol incompatible identification bit based on the operation data; based on the updated abnormal identification bit and the updated protocol incompatible identification bit, determining the operation state of the terminal power supply equipment; by analyzing the operation data of the terminal power supply equipment, the operation state of the terminal power supply equipment is determined in real time, the state detection time of the terminal power supply equipment is effectively saved, the operation and maintenance pressure of workers is relieved, and the power supply reliability, safety and stability of the power distribution network are further improved.

The invention discloses a portable intelligent robot, belongs to the technical field of intelligent robots, and aims to solve the problems that when an intelligent accompanying voice robot is used, the temperature of an internal soft package battery is extremely easy to rise abnormally, and safety isolation and risk management and control are difficult to realize quickly after the temperature of the battery is high. The intelligent accompanying robot solves the problems that a battery cannot be isolated from core elements in the robot in time, key components such as a voice module and a main control board are prevented from being damaged due to liquid leakage and swelling of the high-temperature battery, and potential safety hazards are further caused due to the fact that heat diffusion is difficult to prevent and causes faults of the whole robot. According to the intelligent accompanying robot, when the temperature of the soft package battery reaches a preset threshold value, safe bin unlocking and sliding-out, soft package battery bin returning and limiting, sealing isolation and power failure alarm can be synchronously completed, physical isolation of the battery and a core component is rapidly achieved, heat and leakage diffusion is blocked, risks are avoided from the source, and the safety of the battery is improved. And the multi-scene use safety of the robot is improved.

This application provides a vehicle power supply method, electronic device, and vehicle, relating to the field of vehicle control technology. It is applied to a vehicle power supply system and includes a high-voltage power supply and a first power conversion module and a second power conversion module connected in parallel. The method includes: in response to receiving a power-on command, adjusting the initial voltage of the first power conversion module to be greater than the initial voltage of the second power conversion module, so that the high-voltage power supply supplies power to the load device only through the first power conversion module; comparing the current power of the load device with the current power of the power supply system, and adjusting the power supply status of the first and second power conversion modules based on the comparison result. The vehicle power supply method provided by this application can improve the adaptability and power supply stability of the power supply system.

The headphone comprises a first headphone part, the first headphone part comprises a main body module, the battery and the light-emitting module, the main body module comprises a main body shell, a loudspeaker, a PCBA circuit board and a first ejector pin assembly are installed in the main body shell, the PCBA circuit board is electrically connected with the loudspeaker and the first ejector pin assembly, and the first ejector pin assembly is electrically connected with the battery and the light-emitting module. The main body shell is provided with a concave cavity which is concave inwards, and an internal thread is arranged in the concave cavity; the battery and light-emitting module comprises a battery shell, the battery shell is provided with external threads, the battery shell can be screwed into the concave cavity or be screwed out of the concave cavity and separated from the concave cavity, a battery, a light-emitting part and a second ejector pin assembly are installed in the battery shell, the battery shell is provided with a light-transmitting pattern, and light emitted by the light-emitting part can be emitted to the light-transmitting pattern. The battery and the light-emitting module can be quickly and conveniently replaced, so that the battery and the light-emitting module with patterns can be simultaneously replaced, the battery can be prevented from being directly collided or scratched by foreign objects, and power supply of the battery is stable.