38results about How to "Life balance" patented technology

The invention belongs to the field of chemical equipment, and particularly relates to a waste heat regeneration absorption dryer. The waste heat regeneration absorption dryer comprises an air compressor, an absorption tower A, an absorption tower B, a first cooler, a second cooler, and a gas-water separator; valves of the absorption tower A and the absorption tower B are symmetrically arranged and use compressed air in the air compressor as a heat source during use, and the absorption tower A and the absorption tower B circularly work under programmed control. The waste heat regeneration absorption dryer fully utilizes waste heat of the compressor so that the power consumption of an electric heater, a fan and a steamer of traditional external heating or microheating drying is saved to achieve the external heating regeneration and maximally reduce the energy consumption; the two coolers are arranged so that the cooling effect is good; and the absorption towers have three-layer structures, and gas flow is distributed uniformly in a molecular sieve layer and an aluminum oxide layer under the action of a large water-absorption ball layer, so that the absorption time is prolonged, the absorption effect is enhanced, the gas flow is stable and uniform, the impact force on a sorbent is small, and the service life is prolonged.

The application provides a vehicle and a power battery heating device and method thereof. According to the power battery heating method, when the current temperature value of a power battery is lowerthan a preset temperature value and the heating condition of the power battery conforms to a preset condition, a three-phase inverter is controlled to enable a three-phase alternating current motor togenerate heat according to the heating energy so as to heat cooling liquid flowing through the power battery; a preset quadrature-axis current enabling the torque value output by the motor to be at aproper value is obtained; a corresponding preset direct-axis current is obtained according to the heating power of the power battery; in the heating process, the three-phase inverter is controlled toadjust the phase current of the three-phase alternating current motor according to the preset direct-axis current and the preset quadrature-axis current, and the direction of the preset direct-axis current changes periodically in the heating process, so that the switching times of upper and lower bridge arms of the power switching device of the same phase are uniform, and the service life of thedevice is balanced.

The application provides a vehicle and a power battery temperature control device thereof. At least one of a three-phase inverter and a three-phase alternating current motor in the power battery temperature control device and a first valve form an electric drive cooling loop through a heat exchange medium pipeline, and the first valve and a power battery form a battery cooling loop through a heatexchange medium pipeline; when a control module detects that the temperature of the power battery is lower than a preset temperature and heating conditions are satisfied, the first valve is controlledto communicate the electric drive cooling loop with the battery cooling loop; the three-phase inverter and the three-phase alternating current motor are controlled to heat a heat exchange medium in the electric drive cooling loop to realize the heating of the power battery; and the three-phase inverter is controlled to adjust the phase current of the three-phase alternating current motor according to the obtained preset direct-axis current and the preset quadrature-axis current in the heating process. In the adjusting process, the direction of the preset direct-axis current changes periodically in the heating process, so that the switching times of upper and lower bridge arms of the same-phase power switching device are uniform, and the service life of the device is balanced.

A system and method for providing a screen saver for a display panel in a mobile electronic device are provided. After a time period of inactivity has been sensed, a screen saver image is retrieved from memory and transmitted to a display panel. The method and system also preferably provide means for controlling the colour of the screen saver image to balance the aging of the primary colours within the display panel.

The invention provides a NVM erasing and writing control method based on a heterogeneous hybrid memory. The method comprises the following steps of: obtaining a NVM page erasing and writing time recording table, wherein the page serial number of a NVM and the corresponding erasing and writing time are recorded in the NVM page erasing and writing time recording table; according to the NVM page erasing and writing time recording table, operating the erasing and writing time corresponding to the page serial number of the NVM by adopting a balancing algorithm so as to obtain the operation value of the erasing and writing time; and writing data in the NVM according to the page of the NVM, the page serial number of which is the operation value. Because the balancing algorithm can ensure that the selection times of all pages of the NVM are relatively random and average, the erasing and writing times of different storage units of the NVM are controlled; the service lives of various storage units are relatively average; and the invention further provides a NVM erasing and writing control system based on the heterogeneous hybrid memory.

The invention discloses an electric energy storage device balancing method, relates to the field of battery management systems, and aims at thoroughly solving two problems of over-high battery balance cost and over-high battery cost of electric devices of new energy automobiles and the like. Various battery units, namely battery packs or single batteries in one battery pack in one electric device carry out differential discharging on electric accessories in turn or respectively; good units discharge more electricity; poor units discharge less electricity; the electric accessories are a direct-current converter, a car lamp, a temperature regulating component, a radio and tape player, a brake pump motor, a power-assisted steering motor and the like; a measure and control unit detects various battery unit parameters and regulates and controls differential discharging on the electric accessories; and the prognostic lifetime of the battery units can also be calculated, persistently tends to the same, and is fully prolonged. The electric energy storage device balancing method is applied to new energy automobiles and the like; the problems that an existing battery management technology is free of a discharge balance, can cure the symptoms, not the disease, and is high in cost are completely solved; the electric energy storage device balancing method is simple and ingenious, does not waste electric energy, can also be combined with a charge balance to achieve a thorough balance; and over-high requirements of the whole industry chain on the uniformity, the materials and the technologies of batteries can be reduced, so that the battery cost is greatly reduced; and the benefits are great.

The invention relates to an LED array display device with common redundant sub-pixel points. The LED array display device comprises red sub-pixel points, green sub-pixel points and blue sub-pixel points which are densely arranged, wherein one red sub-pixel point, one green sub-pixel point and one blue sub-pixel point form one light-emitting pixel unit; several light-emitting pixel units surround one redundant sub-pixel point to form one pixel array unit; then, several pixel array units are densely arranged to form the LED array display device. The LED array display device has the advantages that the service life of display arrays can be prolonged through the compensation of the redundant sub-pixel points for surrounding abnormal sub-pixel points, and the influence of the redundant sub-pixel points on the resolution ratio of the display arrays can be reduced to the minimum; besides, as the area of the sub-pixel points and the redundant sub-pixel points with a short service life is slightly enlarged, the power of light-emitting materials per unit area is reduced accordingly, the service life of the sub-pixel points is further prolonged, and the service life of the sub-pixel points is further uniformized.

The invention discloses an intelligent power equalization type electric vehicle. The intelligent power equalization type electric vehicle comprises: a vehicle body on which at least one power supply ports are arranged; two groups of power supply batteries which are fixed on the vehicle body and electrically connected to the power supply ports, wherein each group of power supply batteries is composed of a plurality of rechargeable battery units, a first multiple-winding transformer is arranged between every two battery units, each battery unit is provided with a first bilateral switch on the line connected to the first multiple-winding transformer, a second multiple-winding transformer is arranged between the two groups of power supply batteries, and each group of power supply batteries is provided with a second bilateral switch on the line connected to the second multiple-winding transformer; a starting switch which is arranged on the vehicle body for starting the at least two groups of power supply batteries to supply power to the vehicle body at the same time; and a controller. According to the invention, the bilateral switches are controlled by the controller to make the energy between the batteries transferred through the multiple-winding transformers so as to realize intelligent power equalization.

The invention discloses a negative plate, a preparation method of the negative plate, and a lithium ion battery. The negative plate comprises a current collector and a coating structure, the coating structure is at least arranged on one side surface of the current collector, the coating structure comprises a first coating and a second coating, the first coating is located between the current collector and the second coating, the first coating is made of first slurry, the second coating is made of second slurry, and the particle size of the first slurry is smaller than that of the second slurry. According to the negative plate, the first slurry and the second slurry are simultaneously coated to form the coating structure, the coating thickness of the slurries is uniform, the resistance of the negative plate can be remarkably reduced, the peel strength can be improved, the particle size of the inner layer is smaller than that of the outer layer, the porosity of the surface layer of the negative plate can be remarkably improved, and the liquid absorption efficiency of the electrolyte of the negative plate is improved.

The invention discloses a multi-pump parallel connection multi-frequency-conversion synchronous speed regulating water supply control system and a control method thereof, and relates to the technicalfield of water supply equipment. The problem that water supply is low in efficiency and instable is solved. The system comprises a preset number of water pumps, frequency converters, a sensor, a PLC,a human-computer interface and an industrial 5G router. The water pumps of a preset number are connected together in a multi-pump parallel connection manner, and each single water pump is connected with the corresponding frequency converter; the PLC is connected with the frequency converters and controls running of the water pumps; the sensor is connected with the PLC; the human-computer interfaceis connected with the PLC and achieves human-computer interaction; and the industrial 5G router is connected with the human-computer interface, and equipment managers can remotely control the systemthrough the industrial 5G router. The control system is simple in structure, low in fault rate and precise in control, stepless speed regulating, synchronous frequency regulating, high efficiency andenergy saving are achieved, the multiple pumps are connected in parallel, and flow is subdivided.

The invention discloses a stretching component of an elevator device, which comprises a plurality of carrying bodies of bearing core threads provided with coating layers, and an enclosing body for enclosing the carrying bodies; wherein, the outer appearance of the enclosing body adopts a flat strap-shaped structure, and the width size of the inclosing body is at least larger than the thickness size thereof; the coating layers and the enclosing body of the carrying bodies are made of non-metal material, the carrying bodies are adjacently arranged, the relative motion can be performed between adjacent carrying bodies, as well as between the carrying bodies and the enclosing body. The invention also discloses the elevator device adopting the stretching component. The stretching component can eliminate the deformation of the enclosing body, and the service life of the stretching component is enhanced; the stretching component has the advantages that the structure is simple, the service life is long, and the friction characteristics are good, and meanwhile the arrangement of an elevator system is more flexible.

The invention discloses a reactive compensation control method and device, a storage medium and equipment. The method comprises the following steps: obtaining the circuit parameters of a current three-phase circuit in real time, and calculating the capacitor switching parameters of the current three-phase circuit according to the circuit parameters; determining to switch a capacitor to the current three-phase circuit according to the capacitor switching parameter; and determining a target switched capacitor according to the operation time, the capacitor temperature and the switching times of the plurality of capacitors to be switched in the current three-phase circuit, and controlling the target switched capacitor to be switched into the current three-phase circuit. According to the operation time, the capacitor temperature and the switching frequency of the switching capacitor in the current three-phase circuit, the target switching capacitor is determined, so that the service time, the temperature and the service life of each capacitor are more balanced, the use frequency of the high-frequency capacitor is reduced, the service life of the capacitor is prolonged, and normal operation of a power supply system is ensured.

The invention relates to a method for balancing energy consumption and service life of sensors in an unmanned aerial vehicle Internet of Things system, and the unmanned aerial vehicle Internet of Things system comprises a plurality of sensors and at least one unmanned aerial vehicle which communicates with the plurality of sensors. The method comprises the following steps: S1, calculating the minimum system node transmission energy consumption based on the data load of each sensor; S2, calculating the service life of each sensor based on the residual node energy and the transmission energy consumption of each sensor; S3, describing the energy fairness between the sensors based on a fairness index; and S4, adjusting the bandwidth of the sensor and / or the hovering position of the unmanned aerial vehicle based on the maximum fairness index, the minimum system node transmission energy consumption, the data load and the residual node energy so as to balance the system energy consumption and the service life of the sensor.

The invention is applicable to the field of light emitting diode (LED) display screen electric power supplies, and provides a power supply device with a plurality of parallel connected power supplies and an LED display device. Parallel connection and current sharing of a secondary side are controlled by current of a primary side, so that the plurality of parallel connected power supplies has balanced current, balanced heating performance and balanced service life. Furthermore, if one of the power supplies is failed, other power supplies still can work normally, and the use of the display screen is not influenced.

The invention relates to a switched-mode power supply unit comprising at least two LLC resonant converters (1, 2) which are connected in parallel and each of which includes a test circuit (22, 23, 28, 29, 30, 31) generating a test signal that is proportionate to the transmitted current of the associated LLC resonant converter (1, 2); each test signal is fed to a load controller (25) which modifies at least one switching frequency of an LLC resonant converter (1, 2) in such a way that the test signals converge. This allows the current or load to be accurately split when a plurality of LLC resonant converters (1, 2) is connected in parallel.

This application proposes a vehicle and its power battery temperature control device. In the power battery temperature control device, at least one of the three-phase inverter and the three-phase AC motor and the first valve form an electric drive cooling circuit through the heat exchange medium pipeline. The first valve and the power battery form a battery cooling circuit through the heat exchange medium pipeline; the control module detects that the temperature of the power battery is lower than the preset temperature, and when the heating condition is met, the first valve is controlled to communicate with the electric drive cooling circuit and the battery cooling circuit. And control the three-phase inverter and three-phase AC motor to heat the heat exchange medium in the electric drive cooling circuit, so as to realize the heating of the power battery, and during the heating process, according to the obtained preset direct-axis current and preset quadrature-axis current The current control three-phase inverter adjusts the phase current of the three-phase AC motor. During the adjustment process, the direction of the preset direct-axis current changes periodically during the heating process, so that the switching times of the upper and lower bridge arms of the power switching device of the same phase are even. , device lifetime balance.

The present invention discloses a task analysis and recommendation system. The system comprises an analysis system (1) and a recommendation system (2). The analysis system (1) is configured to generate and analyze data; and the recommendation system (2) is configured to receive data generated and analyzed by the analysis system (1) and recommend corresponding tasks to users.

The invention relates to a converter surface temperature equalization method. The method comprises the following steps: 1, allowing the combustion air valve, high pressure fuel inlet valve and the low pressure fuel inlet valve at the inlet of a combustor to be in fully-open state; 2, measuring the temperatures of all furnace tubes in a converter by an infrared ray high temperature detector one by one, selecting a combustor of a high temperature furnace corresponding area, and turning down the air inflow of the combustion air valve on the combustor; 3, stabilizing combusting for above 2h after the adjustment of the combustion air valve, and repeating step 2; 4, circulating the step 2 and step 3 several times; and 5, turning down the low pressure fuel inlet valve on the combustor if parts of parts of the surface temperatures of the furnace tubes in the converter are high in order to control, and adjusting the operation of the high pressure fuel inlet valve if parts of a small amount of high temperature furnace tubes exist in order to carry out final improvement. Compared with the prior art, the method has the advantages of safety, simplicity, reliability and strong operationality.

The invention relates to the technical field of bulk material conveying, in particular to an adhesive tape conveyor return belt cleaning arrangement structure and a cleaning method. The cleaning arrangement structure comprises a machine frame and a conveying belt, wherein a head roller and a tail roller which drive the conveying belt to run are arranged at the front end and the rear end of the machine frame respectively, the conveying belt comprises a return belt front section and a return belt rear section, a front section conveying mechanism is arranged below the return belt front section, the front section conveying mechanism receives a front section material of a return belt and sends the section material to a discharge port at the front end of the machine frame, a rear section conveying mechanism is arranged below the back section of the return belt, and the rear section conveying mechanism receives a section material after returning the return belt and feeds the section materialinto a material guide groove positioned at the rear end of the machine frame. The adhesive tape conveyor return belt cleaning arrangement structure has the beneficial effects that falling materials atdifferent positions are received by arranging the corresponding conveying mechanisms in the whole process of the conveying belt, and is reasonable and compact in layout; and meanwhile, the materialsare prevented from scattering and accumulating everywhere, so that the environment is improved.

The invention discloses a three-level ANPC circuit which comprises a first switch module, a second switch module, a direct current input end and an alternating current output end. The first switch module comprises at least four connecting ports, and the second switch module comprises at least two connecting ports; three connecting ports of the first switch module are connected with three potential ports of a direct current input end, and a connecting port of the second switch module is connected with the connecting port of the first switch module and an alternating current output end; the first switch module is formed by connecting N double-tube IGBTs (Insulated Gate Bipolar Transistors) in series, or is formed by connecting N thyristors in series; the second switch module is formed by connecting M double-tube IGBTs in parallel or is formed by one double-tube IGBT, N is larger than or equal to 2, and M is larger than or equal to 2. The three-level ANPC circuit can improve the utilization rate of the outer tube and the inner tube to the maximum extent, reduce the cost of the converter and balance the service life of the inner tube and the outer tube at the same time.

The invention discloses a high-precision wide-range gas flow measuring device. The high-precision wide-range gas flow measuring device comprises at least two measuring branches, and one end of each measuring branch is short-circuited to be connected with an interface used for being connected with a to-be-measured gas source; a corresponding switch valve and a flow meter are sequentially arranged on each measuring branch from upstream to downstream. The device further comprises a measurement control system, wherein the measurement control system is in control connection with the switch valves through control lines and in sampling connection with the flow meters through sampling lines. The measuring branches are used, the number of the measuring branches can be increased according to needs,the measuring branches can be automatically selected during gas flow measurement through processing of the measurement control system, the automation degree is high, the problem of inaccurate measurement results caused by disassembly and assembly is solved, the flow measuring precision is improved, and the high-precision measuring range of the measuring device is expanded.