81results about How to "Short charge and discharge time" patented technology

The invention relates to a charge and discharge device for an on-board battery. The charge and discharge device comprises a grid-combined switch, a charge and discharge selective switch, an inverter, an inductive device, a signal detecting unit and a controller; the grid-combined switch is selectively communicated with an external power supply and the inverter according to the different types of the external power supply; the inductive device is connected between the inverter and the grid-combined switch; the signal detecting unit is used for detecting the coherent signals of the external power supply, the charge and discharge selective switch and the on-board battery and transmitting the signals to the controller; and the controller is used for controlling the work of the grid-combined switch and the inverter according to the received signals. The invention also provides a method for controlling the charge and discharge device. The charge and discharge device performs charging and discharging by controlling the charge and discharge power according to the SOC (System On Chip) of the on-board battery, thereby shortening the charge and discharge time. Meanwhile, the grid-combined switch is selectively closed according to the different types of the external power supply, so as to perform charging and discharging.

The invention relates to the field of energy management of electric automobiles, and provides an energy management method for an electric automobile, so that the running cost of the hybrid power electric automobile is lowered. Automobile speed information of the electric automobile is collected and analyzed, and the running working condition type of the electric automobile is identified through the average automobile speed Va or/and the highest automobile speed Vmax of the electric automobile; the corresponding Markov probability transition torque is selected according to the working condition type, so that the predicted automobile speed Vk+n of the electric automobile is obtained; and according to the predicted automobile speed Vk+n, control commands are sent to an auxiliary power unit (APU) controller and a composite power supply controller through a composite power supply control strategy optimized by the Bellman dynamic programming theory, so that the discharge power of an APU system and a composite power supply is equal to the required power PND of a driving motor, and the power consumption of the composite power supply is the minimum. The energy management method is used for managing energy of the composite power supply of the electric automobile, so that the number of use times of a super-capacitor is increased, the working time of the APU system is shortened, and the fuel economy of the electric automobile is improved.

An operation amplifier drive circuit for eliminating the bias voltage of operation amplifier comprises an operation amplifier with a chopper, a first input, a second input and an output, a first switch for receiving an input voltage to be connected to the first input of the operation amplifier, a second switch connected with the first input and the output of the operation amplifier, a third switch connected with the second input and the output of the operation amplifier, and a capacitor connected with the second input of the operation amplifier. The output of the operation amplifier directly discharges and charges the capacitor, and the polarities of the first and the second inputs of the operation amplifier can be exchanged, therefore, the drive circuit can avoid improving the drive ability of input signal, shorten the discharge/charge time of capacitor and eliminate bias voltage.

The invention provides a system of an electric automobile for outwards supplying power. The system comprises a power battery, a charge-discharge socket, a three-level bi-directional DC/AC (Direct Current/ Alternating Current) module, a charge-discharge control module and a controller module, wherein the charge-discharge socket is connected with an externally connected load; one end of the charge-discharge control module is connected with the alternating current end of the three-level bi-directional DC/AC module, and the other end of the charge-discharge control module is connected with the charge-discharge socket; the controller module is used for controlling the three-level bi-directional DC/AC module to convert the voltage of a power battery into the alternating current of a preset voltage value, and providing the alternating current to the externally connected load through the charge-discharge control module and the charge-discharge socket. The system for outward supplying power can outwards supply power through the electric automobile, so that the function of the electric automobile is improved; the three-level bi-directional DC/AC module is adopted, so that the power battery is large power charged and discharged, the efficiency for charging and discharging the power battery is improved, the charging and discharging time is shortened, and convenience is brought for users. The invention also provides the electric automobile.

The invention discloses an elevator driving control and energy saving integrated system. A master control unit based on double DSPs and an FPGA is adopted in the system to collect voltage, current, speed position and other information of a traction machine, and control over the elevator traction machine is achieved after comprehensive judgment. A supercapacitor bank is adopted to serve as a power source for running of a regenerating braking energy storage device and an elevator driving control sub-system, and energy is stored in the running braking process of an elevator sub-system. A supercapacitor are directly connected with a direct-current bus in parallel through a two-way direct-current converter, the master control unit monitors the running state of an elevator in real time by means of an elevator signal collection unit, switching between a charging mode and a discharging mode of a supercapacitor module is finished, and the aim of saving energy is achieved. The system fully uses the characteristics that the supercapacitor is large in discharging current, long in service life, short in charging and discharging time, large in capacitance density and the like, improves energy saving efficiency and safety of elevator running, has very high social benefits and economic benefits, and accords with the concept of environment protection and sustainable development.

The invention relates to a graphene-hydroxyl lithium composite which comprises graphene and lithium hydroxylaniline, wherein lithium hydroxylaniline is bonded with graphene through a covalent bond and distributed on the surface of graphene. The graphene-hydroxyl lithium composite is rich in hydroxyl lithium and can substantially improve specific capacity of an electrode material. Furthermore, the invention also relates to a preparation method and application of the graphene-hydroxyl lithium composite.

The invention relates to a TFT-LCD array substrate and a manufacturing method thereof. The array substrate comprises a gate line and a data line which are formed on a substrate and limit a plurality of pixel areas, wherein a pixel electrode, a first thin film transistor controlling charging of the pixel electrode and a second thin film transistor controlling precharging of the pixel electrode areformed in each pixel electrode. Through forming the first thin film transistor and the second thin film transistor respectively controlling charging and precharging of the pixel electrode in each pixel area, when the pixel electrodes in a pixel row are charged, the pixel electrodes in the adjacent next pixel row realize precharge, thus reducing the difference between the voltage of the frames of the pixel electrodes in the pixel row and the voltage of the next frames, effectively eliminating the defect of higher voltage drop in the polarity inversion mode, effectively shortening the charging/discharging time on the one hand and effectively reducing the drive power consumption on the other hand.

The invention discloses a method for carrying out data programming on flash, comprising the following steps: a. inputting data; b. verifying the current whole page, obtaining the bytes needing to be programmed in the page and recording the bytes into a corresponding buffer storage unit, and completing data programming in the current page if the current page contains no bytes needing to be programmed; and c. programming the corresponding bytes in sequence according to the information recorded in the buffer storage unit, and if the bytes needing to be programmed in the current page have been programmed, returning to the step b, or continuing the step c and operating the next byte. In the invention, the step of data verification and the step of data writing in the process of programming operation are carried out on the whole page, thus greatly reducing the switching times of different voltage on loading grid and drain, saving the charge and discharge time of the grid and drain voltage pumps and then improving the programming speed of flash.

The invention relates to a VDMOS (Vertical Double-diffused Metal Oxide Semiconductor) transistor, belonging to the field of semiconductor devices. The VDMOS transistor comprises a semiconductor substrate, an epitaxial layer, a source doping region, a channel region, a gate oxide layer and a polysilicon gate, and an insulation dielectric layer with a thickness larger than that of the gate oxide layer is deposited at the side of the channel region between the polysilicon gate and the gate oxide layer in a horizontal direction through PECVD (Plasma Enhanced Chemical Vapor Deposition) process. By introducing the insulation dielectric layer, the relative distance between the polysilicon gate and the epitaxial layer is increased, namely the distance between the two polar plates of the gate-drain capacitance of the device is increased, thus under the condition that the area of the polysilicon gate is not changed and the on-resistance of the device is not increased, the gate-drain capacitance of the device is effectively reduced; the charging and discharging time for the gate-drain capacitance during the switching of the MOS (Metal Oxide Semiconductor) transistor is greatly reduced, the switching speed of the MOS transistor is increased, the dynamic loss is reduced, and therefore the performance of the device is greatly improved.

The invention provides an automobile idle speed start-stop system and a hybrid power supply. The automobile idle speed start-stop system comprises an energy storage unit, a starting motor, a motor driver, a power electronic converter device, an automobile state monitoring device and an electronic control unit, wherein the energy storage unit comprises a storage battery and a super capacitor; the starting motor is connected to an engine of an automobile; the motor driver is connected to the starting motor; the power electronic converter device is connected to the storage battery, the super capacitor and the motor driver; and the electronic control unit is in communication connection with the motor driver, the automobile state monitoring device, the power electronic converter device, the starting motor, the motor driver and the energy storage unit and is used for judging whether the automobile is started, normally operated, stopped at an idle speed or stopped or not according to parameters detected by the automobile state monitoring device so as to control the running of the engine and the motor driver, the operation of the power electronic converter device and the energy transfer between the energy storage unit and the starting motor. By the system, the automobile can be quickly started, the economy of fuel can be improved, and the service life of the storage battery can be prolonged.

The invention discloses a low-voltage high-speed frequency divider. A clock control tube is arranged at two ends of load output so as to form a low-supply-voltage frequency divider with clock-controlled transistors. Compared with the circuit structure of the conventional frequency divider, the low-voltage high-speed frequency divider does not need a clock input differential pair tube, and reduces the limitation on the minimum value of a supply voltage. The low-voltage high-speed frequency divider comprises two latches with the same circuit structure, wherein a clock-controlled transistor which is controlled by same-direction clock signals is connected to two output ends of each latch respectively; and the dynamic load of each latch with the clock-controlled transistor is low in resistance in a sampling stage to reduce charging and discharging time, so that the conversion speed is greatly increased, the working frequency is increased, the defect that a quiescent bias point of the conventional dynamic load structure changes is overcome, and the dynamic load is high in resistance value in a latching stage to provide enough gains. One more control dimension is added to the low-voltage high-speed frequency divider, and compared with the conventional latch, the low-voltage high-speed frequency divider is higher in working frequency and wider in working range, and is more adaptive to a low supply voltage.

The invention discloses a prescaler with a clock-controlled transistor, which can provide orthogonal signals. A clock-controlled transistor is added to the structure of a traditional trigger so as to form the prescaler with the clock-controlled transistor, the prescaler with the clock-controlled transistor comprises two triggers, and a clock-controlled transistor controlled by a reverse clock signal is connected with two output ends of each trigger. A dynamic load structure of the trigger with the clock-controlled transistor has low resistance in the sampling stage, thus the charge-discharge time is shortened, the conversion speed is greatly increased, the work frequency is improved, and the shortage of circuit static offset point fluctuation is also overcome; and the dynamic load has high resistance so as to provide enough gain. The one-dimensional high speed low power-consumption prescaler with the clock-controlled transistor has higher work frequency, lower power consumption and wider work range in comparison with the traditional trigger and can keep higher sensitivity.

The invention discloses an off-network optical-record power supply electric bus quick charging device and charging method. The off-network optical-record power supply electric bus quick charging device includes a charging interface which is used for supplying electric energy for an electric bus, a lithium battery pack which can be connected with the electric bus for supplying electric energy for the charging interface, a super-capacitor bank which is in parallel connection with the lithium battery pack, and a photovoltaic power station which is electrically connected with the lithium battery pack and the super-capacitor bank for supplying electric energy for the lithium battery pack and the super-capacitor bank. The off-network optical-record power supply electric bus quick charging devicecan quickly and efficiently supply the electric energy stored in an energy storage apparatus to the power battery of the electric vehicle so as to fundamentally avoid consuming the conventional energy resource and polluting the power grid environment. Besides, the off-network optical-record power supply electric bus quick charging device performs scientific and reasonable optimization on the charging facilities and charging points during the operating way of electric buses of cities and towns so as to enable the operating bus station to be charged with effective electric quantity in relatively shorter time to guarantee normal driving of the buses.

The invention relates to a multi-hole nanometer copper oxide composite material, a method for preparing the multi-hole nanometer copper oxide composite material, supercapacitor electrodes and a supercapacitor. Multi-hole nanometer copper oxide materials directly grow on a copper substrate according to a hydrothermal method to acquire the multi-hole nanometer copper oxide composite material capable of being directly used for making the supercapacitor electrodes. Good conductivity of the metal copper substrate is combined with the superhigh capacitance performance of the nano copper oxide materials to improve the specific capacity of the supercapacitor and prolong the cycle life of the supercapacitor.

The invention relates to a lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material and a preparation method thereof. The preparation method includes: blending according to a molar ratio of 20BaCO3-20SrCO3-20Nb2O5-33.5SiO2-5Al2O3-1.5B2O3-xLa2O3; after barreling and mixing, drying, and melting at high temperature; quickly pouring high-temperature melt into a copper die for forming; destressing and annealing at certain temperature, cutting into glass sheets, and performing controlled crystallization to obtain the lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material. Compared with similar materials, the glass ceramic energy storage material has excellent machining performance, and can be mechanically ground and processed into sheets with thickness lower than 80 um, and convenience is brought to subsequent machining of small devices; the glass ceramic energy storage material has excellent dielectric performance and breakdown field strength resistance.

The invention discloses a liquid crystal panel, a liquid crystal display and a voltage compensation method of the liquid crystal panel. The liquid crystal panel comprises an array substrate, a reference voltage generator and a compensation voltage generator, wherein a signal line and a compensation line are arranged on the array substrate; the signal line comprises a first break line and a second break line; one end of the second break line is connected with one end of the compensation line; the reference voltage generator is used for transmitting a reference voltage signal; one end of the first break line is connected with the reference voltage generator so as to transmit the reference voltage signal; an interval is arranged between the other end of the first break line and the other end of the second break line so as to form a break line; the compensation voltage generator is used for transmitting a compensation voltage signal; the other end of the compensation line is connected with the compensation voltage generator so as to transmit the compensation voltage signal to the second break line; and the compensation voltage signal is greater than the reference voltage signal. By adopting the liquid crystal panel, dark lines can be avoided, and a screen can be normally displayed.

The invention discloses an anti-flicker panel switch with single fire line, comprising an LED (light-emitting diode) lamp, a control module and a power supply interface, wherein the control module is coupled with the LED lamp; the power supply interface is used for outputting supply current required for the LED lamp; the control module is coupled with a power supply circuit; the power supply circuit comprises an electric-chemical capacitor for providing working current required for the control module. A super-capacitor (electric-chemical capacitor) is accessed to a traditional panel switch with single fire line, and the panel switch has the short charging and discharging time and long cycle life; besides because the panel switch is powered by the super-capacitor, no excessive current passes through the LED lamp and the flicker phenomenon does not occur.