55results about How to "Improve inconsistency" patented technology

The invention discloses a power battery pack equalization circuit based on boost conversion and soft switching, and a realization method of the equalization circuit. The equalization circuit mainly comprises a microcontroller, a switching module, a BOOST conversion module and an LC (inductance-capacitance) resonance circuit, wherein the microcontroller gates battery monomers with maximum voltage and minimum voltage in any position of a battery pack on an equalization bus according to battery monomer numbers corresponding to maximum monomer voltage and minimum monomer voltage; and the microcontroller sends a pair of state-complementary PWM (pulse-width modulation) signals to control the LC resonance circuit, so that the LC resonance circuit alternately operates in charging and discharging states. The equalization circuit and the realization method effectively solve the problem that zero voltage difference of the battery monomers cannot be realized easily due to conduction voltage drop of electric and electronic devices; equalization current is increased; the equalization time is shortened; zero current switching equalization is realized; energy waste is reduced; the inconsistency among the battery monomers is improved effectively; and the equalization efficiency is improved.

The invention discloses a switch matrix and LC resonant transformation based cells to cells equalization circuit and a method. The circuit comprises a microcontroller, a matrix switch module, an equalization bus, an LC resonant transformation module and a filtering capacitor. Zero current switch equalization from any adjacent cells to any adjacent cells or any cell in a pack can be achieved, and the equalization efficiency is greatly improved; the magnitude of the equalization current is adjusted by controlling the difference of the optimal discharging and optimal charging cells, and the inconsistency between the cells is improved; the problem of low equalization efficiency of charging and discharging during equalization of traditional pack to cell equalization circuits is solved, and the problem of the limitation of improvement of the equalization current of the Cell to Cell equalization circuits is solved.

The present invention provides a manufacturing method for a microdisplay. After providing a wafer with a plurality of pixel structures on the front side, trenches with a pattern are formed on the backside of the wafer. A transparent plate is disposed above the front side of the wafer and a sealant is applied to join the wafer and the transparent plate. After cutting the wafer and the transparent plate into display cells of suitable sizes, liquid crystal is then introduced in-between the sealant of the display cells.

The invention discloses a battery pack balance control method of an SOC and belongs to the technical field of control. According to the purposes of the battery pack balance control method of the SOC,based on the SOC estimation result and by adopting a model prediction control algorithm, a battery pack balance system is achieved, the inconsistency between single bodies in a battery pack is improved, the battery balance time is effectively shortened, the energy consumption is effectively reduced, and the battery pack balance control method is based on the SOC. The control method includes the steps that a second-level two-way balance circuit based on a power inductor is designed; a second-order RC ring equivalent circuit model considering temperature is built; battery SOC estimation considering capacity fading is performed, and double Kalman estimators are designed to perform battery SOC estimation; and battery pack balance control is performed based on model prediction control. According to the battery pack balance control method, on the basis that the temperature and the capacity fading are considered, the battery SOC estimation precision is improved, and an accurate balance indexis provided for battery pack balance.

The invention discloses a Pack to Cell equalization circuit based on an LC resonant converter and an implementation method of the Pack to Cell equalization circuit based on the LC resonant converter. The equalization circuit mainly comprises a microcontroller, a selective switch module, a master switch, an equalization bus-bar, the LC resonant converter and filter capacitors. A battery single body with the lowest voltage is strobed into the equalization bus-bar by the microcontroller and is connected with the output of the LC resonant converter, and the positive electrode and the negative electrode of a battery set is connected with the input of the LC resonant converter by controlling opening and closing of the master switch. Meanwhile, the microcontroller sends a pair of PWM signals which are complementary in state to control the LC resonant converter to alternately work in a charging state or in a discharging state so as to achieve equalization of zero current switching. The Pack to Cell equalization circuit based on the LC resonant converter and the implementation method of the Pack to Cell equalization circuit based on the LC resonant converter effectively improve inconsistency among the battery signal bodies, enhance equalization efficiency, increase equalization currents, shorten equalization time, achieve equalization of zero current switching, reduce energy dissipation, reduce the number of switches and reduce the circuit size and cost.

The invention discloses an intelligent battery charging and discharging management system and method based on 5G cloud computing platform. The system comprises a battery management system-on-chip based on a double-CPU framework, a 5G communication unit, a database server, the cloud computing platform, a web server and a visual terminal. The battery management system-on-chip of the double-CPU architecture is used for realizing operation state data acquisition of each battery pack and realizing SOC estimation, SOH estimation, fault diagnosis and charging and discharging control of batteries based on battery data information. The 5G communication unit is connected to the battery management system-on-chip of the double-CPU architecture and is used for transmitting the operation state information and the position information of the battery pack to the cloud computing platform in real time and receiving control parameters and signals transmitted by the cloud computing platform; the cloud computing platform is used for realizing multi-dimensional battery parameter extraction, a BMS control strategy and cooperative control of the cloud auxiliary battery management system; 5G is taken as acarrier, and active safety management and intelligent charging and discharging control of a battery pack are realized through edge calculation and cloud state estimation and correction.

The invention discloses a self-adaptive fuzzy balancing control method based on the historical balancing speed. The method is suitable for a Pack to Cell balancing circuit; during each time of balancing, energy is supplemented to a battery monomer with the lowest voltage through a battery pack, the time consumed for each time of balancing is determined through the fuzzy control concept and referring to the time consumed for last time of balancing and the improved voltage difference, the time consumed for balancing is greatly shortened, the number of times of balancing switching is greatly lowered, the over-balancing phenomenon is eliminated, inconsistency between the battery monomers is effectively improved, and the balancing efficiency is improved.

The invention discloses an organic electroluminescent device, and relates to an OLED display device and an OLED light source, in particular to a connecting mode of a second electrode and a lead thereof of the OLED display device and the OLED light source. A through hole for lapping the lead of each second electrode and the second electrode is one in the prior art, due to the problems of deposition angles and the like, the second electrode material on a slope at the periphery of the through hole is less, and the lead of the second electrode is easy to blow so as to appear a concealed wire. The through hole is multiple, and has common shapes such as rectangle, circle, oval and the like. Because the lapping area is increased, the blowing probability is decreased; and the electrical conductivity of the through hole is increased, inconsistent resistance is improved, and the luminescence of a whole screen body is more uniform.

The invention discloses a method for forming a semiconductor component, comprising the following steps: etching a last substrate; detecting the distribution characteristic of the etching result of the last substrate; adjusting the exposure parameters of a next substrate during the photoetching of a masking film pattern; processing the next substrate by photoetching according to the exposure parameters thereof so as to from an etched masking film pattern; and etching the next substrate. The invention also discloses a method for forming a related gate. The methods for forming the semiconductor component and the gate improves the inconsistent etching results due to certain specific distribution characteristic of the etching result resulted from different etching equipment.

The invention discloses an active equalizing system for a multi-path energy transmission battery. The active equalizing system for the multi-path energy transmission battery comprises a total battery pack, an equalizing power supply unit, a battery equalizing module, an energy buffer module and an equalizing system host; the total battery pack is concatenated by more than one battery blocks and electrically connected with the battery equalizing module; one end of the equalizing power supply unit is electrically connected with the equalizing system host and the battery equalizing module respectively, and the other end is electrically connected to the battery pack; each battery equalizing module is electrically connected with the energy buffer module; the energy buffer module is an energy buffer device assisting the battery equalizing module, and the energy buffer module is connected to each battery equalizing module electrically; the equalizing system host analyzes, processes and displays the information sent by each battery equalizing module through the CAN bus, and controls the control strategy of each battery equalizing module. According to the invention, the structure design of the active equalizing system for the multi-path energy transmission battery is simple and reasonable, the cost is reduced, the stability of the system is improved, the inconsistency of the battery pack is improved, and the service life of the battery is extended.

The invention provides a half-decoupling type graded dehumidifying and cooling dehumidifying heat pump system comprising a refrigerant system and an air system. The refrigerant system comprises two compressors and four dehumidification heat exchangers, two four-way reversing valves, an evaporator, two throttling devices and two three-way reversing valves. The air system comprises two draught fans,eight air valves and two air openings. According to the half-decoupling type graded dehumidifying and cooling dehumidifying heat pump system, the dehumidification heat exchangers at different operation pressures are connected in parallel, the evaporation side at the low pressure grade is connected with a dehumidification evaporator and the evaporator in series. A high-pressure dehumidification evaporator adopts a drying agent with a uniform adsorption speed to achieve heat and humidity load pretreatment, condensation of the high-pressure dehumidification evaporator is prevented through a highevaporator temperature, and meanwhile the dew point of air entering the low-pressure dehumidification evaporator is lowered; the low-pressure dehumidification evaporator adopts a drying agent with high adsorption capacity to achieve heat and humidity load efficient treatment, and the switch time of circulations is prolonged. The evaporator connected with the low-pressure side in series can solvethe problem that the heat and humidity load processing capacities of the system are inconsistent.

The invention discloses a GM (1, N) grey forecasting model-based balancing control method. A microcontroller acquires battery monomer voltage in a standing state by utilizing an analog-digital conversion module; the microcontroller judges whether the voltage difference between the average voltage of the acquired monomer voltage and the lowest monomer voltage is greater than the balancing threshold value of the battery, if yes, starting a balancing circuit, otherwise, stopping the balancing circuit; then judging whether the balancing times k of a battery monomer i is greater than the balancing data of the newest set time of the battery monomer I, wherein the balancing data of the newest set time concretely comprises the battery monomer voltage U<i,k-5>- U<i,k-1>, and balancing time te<i,k-5>- te<i,k-1>, wherein k is more than 5; processing the data obtained in the step IV to obtain kst balancing time, starting balancing for balancing time, and standing for ts<i,k> after the balancing is over, thus the balancing control of the time is over, and turning to step 1 for the balancing control next time. According to the GM (1, N) grey forecasting model-based balancing control method, the inconsistency among battery monomers can be effectively improved, and the balancing efficiency can be increased.

The invention belongs to the technical field of education, and discloses a novel Internet of Things remote teaching system and a control method, and the system comprises a video collection module, anediting module, a central control module, a wireless communication module, a server, a mobile terminal, a course management module, a course query module, a course reservation module, a quality evaluation module, a VR teaching module, and a display module. According to the invention, the classroom performance of each course of the teacher is brought into the final course assessment through the quality assessment module, the sampling range is large, the occasionality is small, and the teaching level and the teaching quality of the teacher can be reflected more truly and accurately; Meanwhile, acorresponding three-dimensional teaching video is acquired at each student position through the VR teaching module, so that when a student corresponding to the image acquisition equipment wears the VR head-mounted display equipment, the surrounding environment and characters can be observed to be familiar with the student, and the reality of remote teaching of a user to classroom restoration is improved.

The invention relates to an adaptive wave beam formation method. In one embodiment, the method comprises the following steps of reconstructing a sequence of transducer array elements according to a spatial position of an emission wave beam, putting the array element which is close to the wave beam at a center of a new array and putting the array elements which are far away from the wave beam at two ends of the new array; according to the array element sequence which is rearranged, calculating a covariance matrix used for minimum variance wave beam forming; according to the covariance matrix obtained through estimation, calculating an output result of adaptive wave beam formation. In the embodiment of the invention, through reconstructing the sequence of the transducer array elements, echo information of two ends of the array are fully used; inconsistency of resolutions of an image edge area and a center area is improved and quality of ultrasonic imaging is increased.

The invention relates to a network security method based on a wireless firewall. In the method, the wireless firewall acts on an MAC (Media Access Control) layer of OSI (Open System Interconnection) and comprises an intrusion detection and prevention module, a first frame hook and a second frame hook, wherein, the intrusion detection and prevention module is positioned in a user space of a system; the first frame hook is connected with a kernel space and the user space of the operating system, one end of the first frame hook is arranged in a wireless LAN (local area network) card driver in the kernel space of the operating system, the other end of the first frame hook is arranged in the user space and is connected with the intrusion detection and prevention module, the first frame hook transfers a frame received by the wireless LAN card driver to the intrusion detection and prevention module, and then the frame is sent back to the driver through the frame hook or is deleted after being processed by the module; and one end of the second frame hook is arranged in the wireless LAN card driver in the kernel space of the operating system, and the other end of the second frame hook is arranged in the user space and is connected with a frame encapsulation module. By adopting the network security method, the hacker attack resistance can be strengthened and the availability of the wireless network is improved.

The invention provides extinction solder resist ink for a PCB of an LED display screen, which comprises a first component and a second component, wherein the first component comprises 20%-50% of oligomer, 0.5%-15% of photoinitiator, 5%-15% of nano black filler, 10%-30% of matting agent, 0.2%-2% of coupling agent and 10%-30% of solvent; and the second component comprises 20%-40% of epoxy resin, 5%-40% of a functional monomer, 10%-20% of a delustering agent, 0.2%-2% of a coupling agent and 5%-15% of a solvent; the first component and the second component are stored separately and are mixed when in use. The extinction solder resist ink has good solder resist performance and excellent extinction performance, and can effectively improve the problem of inconsistent ink color when the LED display screen is black. The invention further provides a preparation method of an LED display module adopting the extinction solder resist ink and an LED display screen.

The invention discloses a novel charger. Two or more groups of charging output ends which are in mutual series connection are provided at the same time, so that a battery pack which is in series connection or in series-parallel connection can be charged; the battery pack which is matched with the charger is provided with a corresponding charging lead wire which is correspondingly connected with the charging output ends of the charger. According to the novel charger, the charging output groups of the novel charger are less than the batteries in the battery pack, that is, at least one group of charging outputs is used for charging the battery pack in a one-to-many manner. According to the novel charger, under the condition that a conventional battery pack is simply improved (for example, only one charging guide wire is added), the effect similar to the one-to-one independent charging technology is achieved, the inconsistency of the batteries is obviously improved, and the service life of the battery pack is prolonged.

The invention provides an equalization fault-tolerant circuit structure and equalization fault-tolerant method for a series lithium battery pack. The equalization fault-tolerant circuit includes the reconstructed fault-tolerant loop, a battery selection network, and a flyback converter bridge network. Each lithium battery is connected in series with a group of bidirectional MOSFET shutdown switches, and is connected in parallel with a unidirectional MOSFET bypass switch and a diode to form the reconstructed fault-tolerant loop. The battery selection network consists of bidirectional MOSFET selection switches. Each lithium battery is connected to two groups of bidirectional MOSFET selection switches. Two adjacent lithium batteries share one group of bidirectional MOSFET selection switches.The flyback converter bridge network consists of a flyback converter, a MOSFET switch, and a diode. The equalization fault-tolerant method comprises estimating the state of charge and the state of health of each lithium battery; reconfiguring and isolating a certain lithium battery when the state of health of the certain lithium battery is lower than a failure threshold; calculating a capacity difference between the lithium battery having the most remaining capacity and the lithium battery having the least lithium battery; and starting equalization when the capacity difference is greater thana set threshold. The method improves the energy use efficiency, reliability and safety of the lithium battery pack.

The invention discloses adhesives and a method for preparing a tile containing the adhesives. The compositions by weight portion of the adhesives are: 100 portions of epoxy resins, 50 portions of yellow-stain resistant epoxy resins, 75 to 120 portions of rock powder with over 600 sieves, and 1 to 6 portions of cellulose (HPMC). The method for preparing the tile comprises the following steps that: a. a reflecting film with predetermined specification is selected as the main body; b. a ceramic chip bottom layer the shape and the dimension of which correspond to those of the reflecting film is selected; c. the adhesives are coated on the facade of the ceramic chip bottom layer and the reverse of the reflecting film, and the facade of the ceramic chip bottom layer and the reverse of the reflecting film are glued; d. air extrusion and level adjustment are performed on an adhesive layer; e. a tile formed is solidified; f. water mill grinding or buff grinding are performed on the solidified tile; g. the grinded product is cleaned and dehumidified, and the finished tile is obtained.

The invention discloses an enterprise field sheet material and section bar management method comprising a steel plate stockyard visual portion, a material field management portion, a material physical position tracking portion, a lifting work visual portion, and a system assembly portion; the system assembly portion can concentrately manage instant data of each portion, so the data can be timely updated and stored in a data base. The enterprise field sheet material and section bar management method can reduce steel material stock, improves steel warehousing and checking efficiency, reduces enterprise logistics cost, and tracks the physical position of each material piece in the field.

The invention discloses a driving method for full-screen gray scale correction of a smectic liquid crystal display. The driving method comprises the steps of: initializing; dividing row regions and subregions; generating a row region comparison table, a row region sub-field pulse pair number table, a row region sub-field frequency table, a subregion comparison table and a subregion gray scale value mapping table; selecting a scanning mode, and carrying out row scanning on the smectic liquid crystal display according to the row scanning sequence specified in the scanning sequence array corresponding to the scanning mode. According to the method disclosed by the invention, the output sub-field number, pulse pair number and frequency of row pulse voltage as well as the phase of line pulse voltage are modulated by full-screen region division and various tables which are generated according to the divided regions and are used for building the row and line pulse voltages, thereby realizing the correction on gray scale states of each pixel points on the full screen, improving the regional nonuniformity and inconsistency of the identical gray scale of image display of the display, and avoiding the image distortion phenomenon.

The invention discloses a bidirectional flyback primary-side integrated battery energy storage system. The bidirectional flyback primary-side integrated battery energy storage system comprises a battery unit, an active power converter, an auxiliary power converter and a control circuit, wherein the battery unit is formed by connecting n groups of battery modules in series, one end of the active power converter is connected in parallel with the battery unit, the other end of the active power converter is accessed to a three-phase power grid, the auxiliary power converter comprises a primary-side integrated high-frequency transformer, a primary-side converter and a secondary-side converter, one end of the primary-side converter is connected with the battery unit, the other end of the primary-side converter is connected with the primary-side integrated high-frequency transformer, one end of the secondary-side converter is connected with the primary-side integrated high-frequency transformer, the other end of the secondary-side converter is correspondingly connected with the battery modules, and the control circuit is connected with the active power converter and the auxiliary power converter. By the bidirectional flyback primary-side integrated battery energy storage system, independent current control of the battery modules can be ensured, the inconsistency of the battery modulesconnected in series is improved, so that maximum energy utilization rate is achieved, the service lifetime of the battery modules is prolonged, and more battery modules are easy to expand and connectin series.

The invention discloses a novel lithium ion battery Cell-to-Cell modular equalization circuit based on a single inductor and a control method. The equalization circuit comprises an energy storage inductor, a series battery pack, a switching network, a follow current unit SX, a voltage sampling circuit, a controller and a switch driving circuit. According to the structure of the equalization circuit, switches and batteries form equalization modules, and ports of a plurality of equalization modules are connected to form the equalization circuit of a large battery pack. The circuit has the advantages of simple structure, few switching devices and easiness in modularization, and can realize Cell-to-Cell equalization of the lithium ion battery pack, reduce energy loss, improve the inconsistencyof the lithium ion battery pack and effectively improve the available capacity of the battery pack.

The invention belongs to the technical field of consultation devices and discloses a consultation service control system and method for enterprise e-commerce. The system includes a machine box, a touch screen, a card swiping area, loudspeaker ports, a heat dissipation port, a power source switch, an external connecting wire, a printing outlet, a card reader, a printer, a central processor, a loudspeaker and a heat dissipation device. Consultation about correlated information is carried out through the touch screen, the operation is convenient, training is substituted, convenience is provided for staff to understand and learn different kinds of information of the e-commerce, and therefore all the staff of an enterprise can acquire some knowledge about the e-commerce, so that the e-commerce,regarded as a constantly developing concept, becomes an everlasting unchangeable advantage of the enterprise, and the enterprise keeps pace with the time and grasps the opportunity to the time. A card swiping login system for internal staff can obtain information of the staff and monitor the study process of the staff. The results of mobile reading can be printed out, and printed files can be taken away after users finish reading for better self-examination.

The invention provides an improved flat type loudspeaker vibrating system, which includes a flat vibrating plate and a speech coil which is installed under the vibrating plate, and a round via hole is formed on the installation position of the speech coil of the vibration plate, and the speech coil is installed and fixed on the side wall of the via hole. The speech coil with and integrated structure of the sound file on the top of the speech coil and the speech framework, such as an aluminum cylinder with top is used as the framework of the speech coil, and the sound film is directly form on the top surface. The loudspeaker vibrating system not only can be easily assembled, but also has identical firm combination of the sound film and the speech coil, thereby improving the high-end frequency response further and ensuring the consistency of the loudspeaker performance.

The invention relates to the technical field of battery equalization and discloses an electric quantity equalization device and method for multiple battery cells in a battery pack. The electric quantity equalization device comprises an equalization module, an electric quantity detection module and a control device, wherein the equalization module is used for absorbing electric energy of the battery cells and using the electric energy to discharge other battery cells in the battery pack; the electric quantity detection module is used for detecting the electric quantity SOCnn of each battery cell; and the control device is used for calculating the average electric quantity of the battery cells, determining the battery cells with the electric quantity greater than the average electric quantity of the battery cells in the battery pack, and using the battery cells with the electric quantity greater than the average electric quantity of the battery cells in the battery pack to charge the equalization module, and then the equalization module is controlled to use the charged electric energy to discharge the battery cells with the electric quantity smaller than the average electric quantity of the battery cells in the battery pack. The electric quantity equalization device and method for the multiple battery cells in the battery pack achieve active equalization in the battery pack, effectively improve uniformity of the battery pack and prolong the service lives of the battery cells.

The invention discloses a lithium battery pack active equalization system based on super capacitor energy storage transfer. The equalization system comprises two series battery packs, a controller, two groups of switch arrays and a series super capacitor bank. The controller generates two PWM signals with the same duty ratio to respectively control the upper bridge arms and the lower bridge arms of all the switch bridges in the two groups of switch arrays to be switched on and switched off, so that a battery with high electric quantity in the series battery pack charges the super capacitor bank, and the super capacitor bank outputs the electric quantity to the outside after storing the electric quantity; and also can discharge the battery with low electric quantity. According to the invention, the electric quantity and the output electric quantity are transferred through the series super capacitor bank, the impact of the current on the lithium battery during high-power output can be effectively buffered while the active equalization of the lithium battery is realized, and the contribution to the aspect of prolonging the service life of the lithium battery is outstanding.