171results about How to "Achieve safe operation" patented technology

An insulating coating ( 6 ) formed of engineering plastic with high heat resistance, high-pressure resistance, and chemical resistance is formed on a surface of a water-level detecting electrode part ( 3 ) of an electrode rod for detecting water-level ( 1 ) attached to penetrate a metal container ( 5 ) communicating with a boiler ( 7 ) and including an external power supply connecting terminal part ( 2 ) projecting outside the container ( 5 ) and the water-level detecting electrode part ( 3 ) projecting inside the container ( 5 ). One side of a power supply ( 27 ) is connected to the external power supply connecting terminal part ( 2 ), and another side of the power supply ( 27 ) is connected to the container ( 5 ) for energization. An electrostatic capacity between the water-level detecting electrode part ( 3 ) and the container ( 5 ) is measured by using the insulating coating ( 6 ) formed on the surface of the water-level detecting electrode part ( 3 ) as a dielectric. The water-level of water to be brought into contact with the water-level detecting electrode part ( 3 ) in the container ( 5 ) can be detected from the electrostatic capacity. Proportional target water-level in the boiler ( 7 ) is set based on at least one of the burning capacity, vapor pressure, supply water temperature, and electrical conductivity of boiler water, and at least one of the burning capacity, vapor pressure, supply water temperature, and electrical conductivity of boiler water during operation of the boiler ( 7 ) is detected. A difference between the proportional target water-level to be specified by the detected values and actual water-level in the boiler ( 7 ) detected by the electrode rod for detecting water-level ( 1 ) is constantly calculated.

A boat lift uses a one-way roller bearing in association with a friction disc clutch. A hand-wheel operator provides power input, though a motor may be substituted therefore. A gearing arrangement, a one-way roller bearing and friction clutch, a cable and cable reel for selectively providing tensile force, and a boat support such as a custom hull support or suitable adjustable or universal boat support round out the lift components. Novel couplings permit the handwheel to be rotated and translated axially.

The invention discloses a cold damage prevention refrigeration house, aiming to provide a refrigeration house which can reduce the cold damage caused by the greater temperature difference between the air blast temperature and the temperature in the refrigeration house so as to implement flow equalization in the refrigeration house. An air return jacket is formed between a refrigeration house body and an inner baffle plate; the upper end of the inner baffle plate is provided with an air blast plate; the bottom of the inner baffle plate is provided with a plurality of air return openings; a partition plate is arranged between the air blast plate and the top of the refrigeration house body; a mixed region is formed between the partition plate and the top of the refrigeration house body; a static pressure air blast region is formed between the partition plate and the air blast plate; the middle part of the partition plate is provided with an air blast fan; an air cooler is arranged at one side of the mixed region, and the other side of the mixed region is communicated with the air return jacket; the air return opening of the air cooler is communicated with the air return jacket; and the air blast opening of the air cooler is communicated with the mixed region. Part of the air passing through the air return opening passes through the air return opening of the air cooler and enters the air cooler, is discharged out from the air blast opening of the air cooler, and is mixed with the other part of return air which does not pass through the air cooler, and the mixed air is discharged into the refrigeration house through the static pressure air blast region, thus the temperature difference between the air blast temperature and the temperature in the refrigeration house is reduced, and the generation of cold damage is reduced.

The invention discloses a mold for sewing a belt buckle and a belt and a sewing device. The mold comprises a mold soleplate, wherein a belt buckle grooved plate is arranged on the mold soleplate, and the upper surface of the belt buckle grooved plate extends inwards from the edge end to be provided with a belt buckle groove; a sewing hole is formed on the mold soleplate, and the sewing hole is arranged on the side edge of a notch of the belt buckle groove. The mold soleplate is also provided with a belt track, the belt track faces the notch of the belt buckle groove, and the belt track, the sewing hole and the belt buckle groove stay on the same central axis. The belt track consists of two parallel stop bars which are spaced apart. The belt buckle and the belt, which are to be sewed and well fastened, are fixed on the mold, a sewing position is arranged in the sewing hole, and the sewing area is sewed in the sewing hole through a sewing needle, so that safety in operation is realized, and the working efficiency is improved.

The invention relates to a communication method and device, and in particular relates to a VxWorks-based lithography machine double-workbench communication method and device, aiming at solving the problem that a conventional VxWorks operating system using a TCP (Transmission Control Protocol) or an IP (Internet Protocol) is poor in communication real-time performance. The communication method and the device are realized based on a double-workbench lithography machine, an upper computer and a VME (Virtual Machine Environment) industrial personal computer, and adopts double channels of the TCP and a UDP (User Datagram Protocol) for communication, wherein the channel of the TCP is used for transmitting instructions of the upper machine, the channel of the UDP is used for transmitting execution result information of the VME industrial personal computer, a buffering queue is used for caching all the instructions and data information which are then read out one by one, and finally executed and sent, and a zero copy buffering area is adopted for nesting word interfaces. The communication method and device are used for communication when a lithography machine double-workbench is arranged in an environment which is provided with the VxWorks operating system and has access to the Ethernet.

The invention discloses a gas-fired boiler system and an operation method thereof, wherein the gas-fired boiler system comprises a first chemical chain combustion reactor and a second chemical chain combustion reactor, wherein the first chemical chain combustion reactor and the second chemical chain combustion reactor are filled with oxygen carriers; when fuel gas is introduced into either the first chemical chain combustion reactor or the second chemical chain combustion reactor for reducing the oxygen carriers, air is introduced into the other chemical chain combustion reactor for oxidizing the oxygen carriers; through switching a fuel gas pipeline and an air pipeline, the oxygen carriers in the first chemical chain combustion reactor and the second chemical chain combustion reactor are alternately oxidized and reduced; during the oxidization and reduction reaction, heat is provided for a heat supply medium. The gas-fired boiler system has high heat energy utilization rate.

The invention discloses an impedance matching system suitable for a marine communication electroacoustic transducer, and a matching method thereof. The impedance matching system comprises a precedingstage power amplifier, an impedance matching network, a magnetostrictive transducer equivalent circuit and an impedance matching cooperative control system, the impedance matching network and the preceding stage power amplifier perform cooperative control, and static matching and dynamic matching are combined to achieve good matching of the transducer. Compared with the traditional static matching, the impedance matching network proposed by the invention for the marine communication electroacoustic transducer can measure an equivalent resistance value and an inductance value of the transducerin real time under the condition that the working environment of the transducer changes and the load changes to achieve dynamic matching, and track the resonance frequency by detecting the peak valueof the equivalent resistance of the transducer, improve the electroacoustic conversion efficiency of the system, and reduce the heat generation of the transducer; and compared with the traditional dynamic matching, the impedance matching system greatly reduces the capacity of a binary capacitor array and improves the precision, thereby improving the matching effect.

The present invention discloses a method for monitoring efficient and safe operation of a coal mining face ribbon conveyer. The method comprises: step 1, arranging hardware equipment used for monitoring; step 2, performing data collection and transmission; and step 3, performing data processing and efficient safe and operation control of the ribbon conveyer. The method in the present invention method is simple in steps. Feature point data of a coal flow outer contour is detected by using a laser radar, a real-time belt speed of the conveyor belt is detected by using a rotary encoder, and a coal flow can be efficiently and accurately detected through data analysis processing and calculation on data by a computer. A visual sensor is used for efficiently and accurately detecting a coal contour on the conveyor belt, so that accurate and automatic recognition of large-sized coal on a mining face is implemented. Coal flow detection efficiency is high, and precision is high. A large-sized coal recognition method is simple and reliable, has a small error, is of great significance to efficient and safe operation of an underground coal mine ribbon conveyer, and is easy to popularize and use.

The invention discloses a method and a system for safely running an executable file. The method comprises the steps of: when it is detected that the executable file is called, obtaining an executablefile, the calling main body of the executable file and the operation instruction of the calling main body to the executable file, when it is determined that the operation instruction of the calling main body on the executable file is valid; further verifying whether the executable file, the calling main body and the operation instruction exist in a preset ACL or not; verifying whether the executable file is tampered or not and whether the digital signature of the executable file is credible or not by matching the digital signature of the executable file with the digital signature of the executable file corresponding to the ACL, loading the executable file only when all verification passes, and starting a new process to run the executable file. Before the executable file is operated, the executable file is verified for multiple times, the executable file carrying viruses and / or malicious programs is filtered out, and safe operation of the executable file is achieved.

The invention discloses an optimal tide calculation method for wind power plant connected VSC-HVDC which includes the following steps: establishing the active power output model of wind farm and considering the mathematical model of VSC-HVDC. The auto-regressive moving average model and the scene reduction strategy based on Kantorovich distance are adopted to simulate the uncertainty of the wind power, and a finite number of wind power scene sets are obtained according to the power model of the wind farm. An interior point method is used to analyze the finite set of wind power scenarios and the mathematical model of VSC- HVDC is used to calculate the optimal power flow, and the numerical characteristics of the output variables are obtained. The invention discloses a wind farm grid-connected VSC-HVDC optimal power flow computation method can effectively solve the problems that the existing technology can not obtain accurate digital characteristics of output variables, the computation process is complex and the computational efficiency is low. The embodiment of the invention also discloses an optimal tide calculation device for wind power plant connected VSC-HVDC.

The invention discloses a train overload detection system and method. The system comprises overload detection devices and a control device connected with the overload detection devices. Each overload detection device comprises an overload detection main machine and at least two detection parts, wherein the detection parts are used for detecting the load capacity of a compartment; the overload detection main machine is used for obtaining the load state of the corresponding compartment according to the load capacity detected by the detection parts and sending the load capacity and the load state of the corresponding compartment to the control device; and the load state comprises a safety state, a weighting state and an overload state. The control device is used for sending a warning signal according to the load capacity and the load state of each compartment so that crew members can adjust the load capacity of the compartment according to the warning signal corresponding to the compartment. By means of the train overload detection system, the problem that the actual load of an existing train cannot be reflected through a ticket business system and manual management, so that large potential safety hazards exist during train operation is solved.

The invention provides a dust remover and belongs to the technical field of machinery. The dust remover solves the problem that an existing dust remover is easy to explode in the use process. The dust remover of an improved structure comprises a dedusting box and an ash storage box located below the dedusting box. The dedusting box is fixedly connected with the ash storage box. The dedusting box comprises a dedusitng cavity and an air purifying cavity. The dedusting cavity is internally and fixedly connected with a filtering bag. The dust remover is characterized in that the bottom of the dedusitng box is provided with an ash collection channel communicated with the ash storage box, the dedusting box is provided with an ash discharging mechanism capable of controlling the connected state or the cut-off state of the ash collection channel, the ash storage box is provided with a primary air inlet and a primary air outlet which are communicated with an inner cavity of the ash storage box, the dust remover further comprises a plurality of vertical supporting pipes vertically arranged, and the primary air outlet is communicated with the upper portion of the dedusting cavity of the dedusting box through the vertical supporting pipes. By means of the dust remover of the improved structure, explosion in the use process can be prevented, and safety performance is improved.

The invention discloses a coil inter-turn insulation fault detection method, device and system. The method includes the following steps that: the characteristic information of a measured reactance-type coil is acquired, and the characteristic curve of the measured reactance-type coil is drawn according to the characteristic information of the measured reactance-type coil; the difference of the characteristic curve of the measured reactance-type coil and a standard characteristic waveform is calculated according to the characteristic curve of the measured reactance-type coil and the standard characteristic waveform; and if the difference exceeds a first threshold value, it is judged that an inter-turn insulation fault occurs on the measured reactance-type coil. With the coil inter-turn insulation fault detection method, device and system provided by the invention adopted, the detection of the inter-turn short-circuit defect of a reactance-type coil in the control loop of a high-voltagecircuit breaker is realized; the inter-turn insulation state of the reactance-type coil can be detected; and the safe operation of the high-voltage circuit breaker can be realized.

The invention relates to a braking torque self-detecting circuit for an elevator brake. The braking torque self-detecting circuit is characterized in that a band-type brake loop is connected to the input ends of two brake controllers, the output end of each brake controller is connected with an electromagnetic coil, the two brake controllers are respectively provided with a control end controlling the action of the corresponding brake controller, the control ends are connected with level control loops respectively connected with an isolation control switch, and the input ends of the level control loops are used for being connected with an upper computer of an elevator control cabinet and receiving a braking torque self-detecting order sent by the upper computer. According to the braking torque self-detecting circuit, the separation state of not supplying electricity to the brake while an elevator motor is powered on can be achieved, whether the braking torque of the brake meets the requirement or not can be judged by judging whether the motor can rotate or not, or the braking torque of the elevator brake can be automatically detected by respectively judging whether the braking torque on each side of the brake meets the requirement or not so that the self-detecting of the braking torque of the elevator brake can be achieved.

The invention relates to a lead and zinc smelting cooling device fast in heat dissipation. The lead and zinc smelting cooling device comprises a shell, a heat dissipation pool and a propeller. A cooling pipeline repeatedly bent is arranged in the shell. The water inlet port and the water outlet port of the cooling pipeline are formed in the two sides of the upper end of the shell. The water inlet port of the cooling pipeline is communicated with the upper end of one side of the heat dissipation pool through a pipeline. The water outlet port of the cooling pipeline is communicated with the lower end of the other side of the heat dissipation pool through a pipeline. An electromagnetic valve is arranged on a pipeline between the water outlet port of the cooling pipeline and the heat dissipation pool. The propeller is fixedly arranged at the bottom end in the heat dissipation pool. Compared with the prior art, the lead and zinc smelting cooling device accelerates water heat dissipation, improves the heat dissipation efficiency, saves energy, and is environmentally friendly and good in cooling effect.

The invention discloses a shaft sinking winch steel wire rope overload rope breaking protection system. The system comprises a head sheave, a tension sensor, a steel wire rope, a shaft sinking winch and a brake control system. Loads are connected through the tail end of the steel wire rope. The steel wire rope penetrates through the tension sensor and is wound on a shaft sinking winch roller. The steel wire rope bypasses the head sheave. The head end of the steel wire rope is also fixed to the shaft sinking winch roller. A shaft sinking winch control system is connected with the shaft sinking winch brake system, a shaft sinking winch motor and the steel wire rope tension sensor. According to the protection system, a steel wire rope breaking protection device and an electronic control system and the brake system of a shaft sinking winch hoisting system are organically combined, the structure is simplified, the cost is lowered, the steel wire rope is prevented from being snapped due to overloading, and protection of the steel wire rope is achieved.

The invention discloses a method and device for communication between an upper computer and a lower computer under the control of secondary platform movement and relates to a communication method and device. The method and device aim to solve the problem that a traditional method for communication between the upper computer and the lower computer under the control of secondary platform movement is poor in real-time performance. A communication node of the upper computer and a communication node of the lower computer are in communication through a TCP communication protocol. The communication node of the lower computer conducts communication with a single-chip microcomputer through a serial port. Since a large number of communication instructions are used, a communication protocol and a communication device of an application layer are defined. When the upper computer sends an instruction to the lower computer and the single-chip microcomputer, the upper computer sends data to the communication node of the lower computer through a TCP channel, the communication node of the lower computer sends information of the application layer to the single-chip microcomputer through the serial port, and the single-chip microcomputer executes a corresponding function according to the instruction. The method and device are suitable for communication between the upper computer and the lower computer under the control of secondary platform movement.

The invention discloses a device which is arranged on the original foundation of a high voltage transmission tower and capable of hoisting the height of the tower and preventing mining-induced deformation. The device comprises a metal foundation sheath sleeved on the original foundation of a high voltage transmission tower, a reversible translation support arranged on the foundation sheath, and a vertical lifting support arranged on the reversible translation support, wherein the upper end of the vertical lifting support is connected with the tower leg of the high voltage transmission tower, and the vertical lifting support is composed of a hydraulic lifting support and a fine-tuning lifting device. The device of the invention is arranged on the original foundation of a high voltage transmission tower, and has the functions of hoisting the height of the tower and preventing mining-induced deformation, thereby solving the problem that the earth surface subsidence caused by coal mining has an effect on the high voltage transmission tower, and ensuring the safety of the tower, and realizing the stoping of resources under the high voltage transmission tower.

The present invention relates to an operation management system for a moving body such as a vehicle using a mobile terminal. The present invention reliably and accurately records the operating conditions of vehicles, which enables management to gather accurate information regarding the work performed by a driver or crew in the moving vehicle. Moreover, the present invention realizes safe operation of a moving vehicle by detecting, during operation of a moving body, whether the moving body is exceeding the speed limit and informing the crew of this condition so that the driver will reduce speed to obey the speed limit. The present invention also deters theft of vehicles.

The invention discloses a high-temperature steam corrosion inhibitor. The high-temperature steam corrosion inhibitor comprises fatty amine and further comprises polyamine. According to the high-temperature steam corrosion inhibitor, the stability at the low temperature (<= 350 DEG C) and the reaction activity and the chemical deoxidization capacity at the high temperature (>= 400 DEG C) of the DFS are found and utilized for the first time, and the generation process of oxide skin is restrained and stopped from the beginning; the ideal operation mode of a supercritical (ultra-supercritical) boiler is achieved.

The invention relates to a fully-coated anti-corrosion magnetic pump shaft with an impeller capable of being locked in a dual mode. The pump shaft comprises a pump shaft body and the impeller. The pump shaft body is provided with a center hole, a metal core, a shaft shoulder, a key groove and a bolt hole. A polyether-ether-ketone injection molding coating is arranged on the total surface of a hollow metal core of the pump shaft. The impeller and the pump shaft are connected through a key, an impeller nut and an impeller bolt in a locked mode. The locking direction of the impeller nut is opposite to the rotating direction of the impeller. The total surface of the hollow metal core of the pump shaft is coated with the polyether-ether-ketone injection molding coating so that the pump shaft can be wrapped completely, permeation of corrosive media is eradicated, and therefore the service life of the pump shaft is prolonged; by adopting the impeller nut capable of locking the impeller on the pump shaft and an impeller screw locking the impeller nut on the pump shaft, the dual-locking purpose is achieved, the safe operation of the impeller is well ensured by means of the dual-locking structure, and it is ensured that the dual-locking structure is not prone to loosening.

The invention relates to a system and method for treating a desulfurization wastewater concentrated solution. The system for treating a desulfurization wastewater concentrated solution comprises a boiler, an air preheater, an electric dust collector, a desulfurizing tower, a concentrator, a concentration pump and a treating tower which are sequentially connected, wherein the desulfurizing tower is connected with an external chimney. The method for treating a desulfurization wastewater concentrated solution comprises the following steps: 1) turning on a bypass gas inlet switch to guide bypass flue gas to enter the treating tower; 2) starting an upward spray gun and a downward spray gun, thereby forming a misty concentrated solution in the treating tower; 3) when the flue gas temperature at the bypass flue outlet is lower than the threshold, opening a three-way valve so that the flue gas returns to a pipeline at the front ends of the boiler and air preheater; 4) when the flue gas temperature at the bypass flue outflow is higher than the threshold, opening the three-way valve so that the flue gas enters the pipeline from the air preheater to the electric dust collector; and 5) sending the flue gas in the step 4) into the electric dust collector, discharging through an electric dust collection port.

The invention discloses a miniature box-type drag chain scraper flipover leacher. The miniature box-type drag chain scraper flipover leacher comprises a box-type leacher shell, wherein a plurality of driving chain wheels are arranged in the box-type leacher shell, and are sleeved by box chains; spaced push plates are fixedly arranged on the outer side of the box chains; material storage tanks, manholes and discharge holes are respectively formed in the upper end and the lower end of the box-type leacher; feeding augers are arranged below the material storage tanks; a plurality of push box lattices as leaching units are arranged in the box-type leacher; circulating mixed oil forms a soaking pond above each push box lattice; a plurality of oil buckets are formed in the bottom surface of the box-type leacher shell; and circulating pumps are arranged at oil inlets of the oil buckets. The miniature box-type drag chain scraper flipover leacher adopts a dual-layer multi-nozzle spray-type low material level, is suitable for a preform which is large in particle size and high in moisture content (5%-8%) and of which the normal moisture is not greater than 8%-10%; the equipment operation is controllable; the production operation is stable; blanking and meal discharging are stable; the residual meal discharge oil is not greater than 1.0%; the leaching time is controlled at about 90-120 minutes in general according to the oil variety; and the optimal effect of continuous production of the special oil is achieved.

The invention discloses a chlorine dioxide catalytically-oxidizing apparatus used for waste water treatment. The apparatus includes: a chlorine dioxide generation apparatus, a chlorine dioxide absorption apparatus being connected thereto, a sewage-intercepting security device, and a chlorine dioxide catalytically-oxidizing column. Chlorine dioxide generated in the chlorine dioxide generation apparatus is absorbed by means of the chlorine dioxide absorption apparatus to obtain a chlorine dioxide water solution. The chlorine dioxide water solution and waste water, which passes through the sewage-intercepting security device, are both fed into the chlorine dioxide catalytically-oxidizing column for later treatment. In the chlorine dioxide catalytically-oxidizing apparatus, a catalyst can enhance the catalytically-oxidizing effect of the chlorine dioxide, an aeration apparatus can increase contact efficiency between the chlorine dioxide and the waste water. Aeration and reaction exist together, so that oxidizing effects is improved and dechlorination is carried out at the same time, thereby achieving safe operation of the apparatus. Waste water is improved in biodegradability after being treated through the apparatus.

The invention discloses an intelligent vertical mill control system based on a distributed control system (DCS). The intelligent vertical mill control system comprises a data collecting module, a data analysis module, the DCS module, a control module and an execution module, wherein the data collecting module is used for collecting the operating parameters of a vertical mill system in real time; the data analysis module is used for receiving the operating parameters, sent by the data analysis module, of the vertical mill system and carrying out configuration analysis and logic operation on the operating parameters of the vertical mill system so that a data analysis result can be obtained; the DCS module is used for receiving the data analysis result and generating a control instruction according to the data analysis result; the control module is used for receiving the control instruction from the DCS module and converting the control instruction to a control signal; and the execution module is used for receiving the control signal from the control module and carrying out corresponding operations according to the control signal. According to the intelligent vertical mill control system, the operating parameters of the vertical mill system are collected in time through a PLC and subjected to data analysis, the DCS module generates the corresponding control instruction, and therefore the vertical mill system is controlled.

The invention relates to a radiator for an LED device. The radiator comprises an evaporator, a steam pipeline, a liquid pipeline and a condenser, wherein the evaporator is provided with a steam outflow port and a liquid inflow port; the steam pipeline and the liquid pipeline are respectively connected with the condenser by the steam outflow port and the liquid inflow port to form a closed heat dissipation loop; the evaporator comprises a heat removal body and a liquid suction core; the heat removal body is provided with an accommodating space; the accommodating space is used for arranging the liquid suction core; the heat removal body is square; the cross section of the accommodating space is circular or oval. The heat removal body is square, and thus, the heat removal body can be tightly attached to a square body of a common electronic chip so as to realize real matching. Meanwhile, the cross section of the accommodating space of the heat removal body adopts circular or oval, and thus, the cross section can realize sealing between the liquid suction core and the heat removal body easily. The radiator for the LED device can really realize safety operation under the high heat flux density.

The invention discloses a culture device and a culture method for double membrane aerating aerobiotic methane-oxidizing bacteria. The method comprises the following steps: putting sludge rich in methane-oxidizing bacteria and a soil suspension into a reaction device cavity; and introducing methanol and oxygen by way of bubble-less aeration to achieve high-density and low-cost culture of the aerobiotic methane-oxidizing bacteria. The invention also provides the culture device for double membrane aerating aerobiotic methane-oxidizing bacteria. As solubility of methane and oxygen in water is relatively low, sufficient carbon sources and energy sources cannot be provided to microorganisms in a reaction device and methane mixed in air or oxygen exceeding a certain proportion has a risk of explosion, gas-liquid mass transfer resistance is broken through by way of double membrane aeration, so that the dissolved load of methane and oxygen in a solution is improved. A primer can be provided efficiently at low cost, and the culture device and culture method are suitable for culturing aerobiotic methane-oxidizing bacteria efficiently, and a high density aerobiotic methane-oxidizing bacteria culture is used for sewage treatment, intermediate product production, greenhouse gas emission reduction and the like.

The invention relates to passenger car power supplies, in particular to an intelligent power supply management system for a passenger car. A first current sensor module, a voltage sensor module and a temperature sensor module are arranged to detect the charging and discharging current, the work voltage and the temperature of a storage battery correspondingly, a second current sensor module is used for detecting the whole car electricity utilizing current, and a circuit protecting module is used for timely disconnecting a corresponding power supply loop under the abnormal conditions such as large current overloading, voltage shortage and overvoltage; and a battery charging and discharging control module is used for controlling an electric generator to charge the storage battery. A power supply management main control module is internally equipped with a storage battery charging state algorithm, according to the temperature of the battery, the battery capacity is corrected, and on the basis of battery characteristic data and real-time detecting data, the charging state is calculated by combining an open circuit voltage method and an ampere-hour integral method. The power supply management system achieves sharing of information and resources with other control units through a CAN bus, and data of the power supply management system are transmitted to a background database and can be used for further data mining, battery loss analysis and failure prediction.

The invention discloses a risk assessment method for a running state of a charging station. The method comprises the steps of defining a plurality of primary risk assessment indexes of the charging station, wherein each primary risk assessment index comprises a plurality of secondary risk assessment indexes; performing single-level fuzzy analysis on the primary risk assessment index by applying a fuzzy analytical hierarchy process; performing multi-level fuzzy comprehensive assessment on the secondary risk assessment indexes by applying the fuzzy analytical hierarchy process; and according to a multi-level fuzzy comprehensive assessment result, calculating a risk assessment value. According to the method, the fuzziness and levelness among risk assessment factors of a charging and battery replacement station are considered, and the performance of each factor in assessment is clearly determined through an expert experience marking table, so that the risk assessment is more objective, safe running of the electric vehicle charging and battery replacement station is realized, and the hazard loss is reduced to minimum.