277results about How to "Large output current" patented technology

A polymer gel electrolyte includes an electrolyte solution composed of a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, in combination with a matrix polymer. Secondary batteries made with the polymer gel electrolyte can operate at a high capacitance and a high current, have a broad service temperature range and a high level of safety, and are thus particularly well-suited for use in such applications as lithium secondary cells and lithium ion secondary cells. Electrical double-layer capacitors made with the polymer gel electrolyte have a high output voltage, a large output current, a broad service temperature range and excellent safety.

A polymer gel electrolyte includes an electrolyte solution composed of a plasticizer with at least two carbonate structures on the molecule and an electrolyte salt, in combination with a matrix polymer. Secondary batteries made with the polymer gel electrolyte can operate at a high capacitance and a high current, have a broad service temperature range and a high level of safety, and are thus particularly well-suited for use in such applications as lithium secondary cells and lithium ion secondary cells. Electrical double-layer capacitors made with the polymer gel electrolyte have a high output voltage, a large output current, a broad service temperature range and excellent safety.

The invention discloses an electric car modularization power system based on parallel connection of batteries and a control method. The electric car modularization power system comprises a battery system and a motor control system, wherein the battery system comprises a power supply battery pack and a battery management system, the motor control system comprises an inverter and an inverting control module, the battery management system is used for managing, sampling and controlling the power supply battery pack, the power supply battery pack is connected to the inverter through a conducting wire, the inverter is used for inverting direct currents into three-phase electric power with adjustable voltage and frequency, which is supplied to a traction motor, and the inverting control module is used for controlling the inverter and is in communication with the battery management system through a bus; power supply batteries are connected in parallel, the power supply battery pack is divided into n groups, the n groups of batteries are respectively used for supplying power to the traction motor by adopting inverter circuits, and the motor control system is combined with the battery management system, and thus the standardization and the modularization of the power system are facilitated, and the management and the replacement of the batteries are convenient.

A technology for manufacturing an interlaced back contact (IBC) crystalline silicon solar battery with ion implantation comprises the following steps: (1) selecting a crystalline silicon base body to perform surface texturing; (2) forming a homotype doping layer having the same electrical property with the base body on the positive surface; (3) forming n+ doping regions and p+ doping regions interlaced to each other on the back surface of the crystalline silicon by the ion implantation; (4) insulating the n+ doping regions and the p+ doping regions on the back surface of the crystalline silicon base body; (5) performing annealing in order to eliminate crystalline damage caused by iron implantation to the crystalline silicon base body, and performing thermal oxidation to form a SiOx oxide layer; (6) forming a passive anti-reflecting film on the positive surface of a silicon chip; (7) forming a passive film on the back surface of the silicon chip; and (8) forming an emitter and a metal contact electrode of a base electrode on the back surface, and forming the ohmic contact of the metal electrode with the n+ doping regions and the p+ doping regions after one sintering. The method canaccurately control concentration, depth and position of the doping, and the technological process is simple, and easy to operate.

The invention discloses a DC converter with high voltage input and low-voltage large current output, comprising a main circuit and a control circuit. The main circuit is composed of n-numbered modules with the same structure, the input ends of the n-numbered modules are connected with the output ends thereof in parallel, each module is of a preceding or succeeding stage structure, wherein the preceding stage is a non-isolated DC converter, and the succeeding stage is an isolated DC potential transformer. The control circuit comprises a three-ring control circuit, synchronously staggered frequency dividing circuits among the modules, and a voltage open-loop control circuit, wherein the three-ring control circuit comprises a succeeding stage output filter inductive current equalizing outer ring, a succeeding stage output middle ring and a succeeding stage output filter inductive current inner ring. The convertor is applied to circumstances with high voltage input and low-voltage large current output, and has the advantages of small volume, high efficiency and high reliability.

The invention discloses nitrogen-doped graphdiyne serving as an oxygen reduction electric catalyst and a composite material of the nitrogen-doped graphdiyne. The invention further relates to a preparation method of the nitrogen-doped graphdiyne. The nitrogen-doped graphdiyne material is obtained by heating graphdiyne power in mixed gas with a nitrogen source under certain temperature, keeping the temperature for certain time, and then naturally cooling the material. The catalyst material is high in activity; compared with a more commercial Pt / C catalyst, the catalyst material has the advantages of high output current, correction of reduction potential, high methanol interference resistance, high stability and the like.

The invention discloses an aluminum alloy anode material of batteries, which uses aluminum whose purity is higher or equal to 99.99% as raw materials. Magnesium (Mg), stannum (Sn), gallium (Ga) and bismuth (Bi) are added, and the mass percentage of elements which are added is that Mg: 0.5-1.5%, Bi: 0.01-0.2%, Sn: 0.01-0.4%, Ga: 0.01-0.3%, and the mass content of impurities is equal to or less than 0.01%. The invention has the advantages of high operating factor of the cathode and the anode of a working potential, stable output of big power and even corrosion on the surface.

The invention provides a low-voltage CMOS folding co-source co-grid mixer. The mixer includes the following parts: a pair of transconductance poles composed of NMOS tubes, tow pairs of switch poles composed of NMOS tubes, a pair of load poles composed of NMOS, and a current source. In the structure of the mixer circuit, the transconductance poles are connected with the switch poles in a co-source co-grid method. The invention solves the problems of the high power supply high voltage caused by the overlapping of the transconductance poles and the switch poles of the traditional Gilbert mixer, and the compromise design between the high transconductance and the high linearity of the transconductance poles and the low noise of the switch poles. The invention can be used in the application of the deep submicron RF CMOS circuit, in particular in the design developing of the satellite navigation double-system compatible receiver radio frequency integrated circuit. The invention has bright application prospect in both the military and the civilian fields.

The invention provides a fuel cell system starting control method and device, which are applied to the technical field of fuel cells. The method comprises the steps: responding to a starting instruction, adjusting air supply parameters, hydrogen supply parameters and cooling liquid supply parameters of a fuel cell stack, and under the condition that all the supply parameters reach a preset currentloading condition, enabling the controller to increase the output current of the fuel cell stack according to a preset current slope, maintaining the current state of the system after the output current of the fuel cell stack reaches a preset current threshold value and the rotating speed of the air compressor reaches a preset rotating speed threshold value of the air compressor, and accumulatingthe heating value based on the output current of the fuel cell stack; and finishing cold start until the heating value of the fuel cell stack reaches a preset heating value threshold. According to the control method, low-temperature cold start can be quickly completed on the premise of canceling a heating device, the optimization of vehicle user experience is facilitated, and the overall cost ofthe fuel cell system is reduced.

The invention discloses an aluminum alloy composite material and a preparation method thereof. The aluminum alloy composite material is prepared from the following components in parts by weight: 89-93 parts of aluminum, 4-6 parts of iron, 3-6 parts of manganese dioxide, 3-5 parts of magnesium, 1-2 parts of titanium dioxide fibers, 1-1.5 parts of tin, 0.5-1 part of tungsten carbide, 0.05-1 part of zinc oxide and 0.05-0.1 part of graphene nanosheets. The invention also provides a method for preparing the material. The method comprises the following steps: (1) weighing the following components in parts by weight: 89-93 parts of aluminum, 4-6 parts of iron, 3-6 parts of manganese dioxide, 3-5 parts of magnesium, 0.05-1 part of zinc oxide, 0.05-0.1 part of graphene nanosheets and 0-0.5 part of vanadium pentoxide, heating to the temperature of 660-690 DEG C under an inert atmosphere, and uniformly mixing; (2) adding 0.5-1 weight part of tungsten carbide subjected to ball milling into the product in the step 1 under the inert atmosphere, and heating to the temperature of 1100-1200 DEG C; and (3) sequentially adding 1-2 weight parts of titanium dioxide fibers and 1-1.5 parts of tin into the product in the step 2 under the inert atmosphere, preserving the temperature at the temperature of 800 DEG C for 0.5-2 hours, removing the slag, and degassing, thereby obtaining the aluminum alloy composite material.

The invention provides an intelligent distribution box. A new generation intelligent distribution management system takes a computer control technique and a solid power control technique as bases, and has the function of on-off control of electric loading, overcurrent protection and automatic protection for other electric equipment. The intelligent distribution box is characterized by techniques of power distribution priority level control, manual on-off control through control switches, bus on-off control, fault resetting, status indication, information reporting, solid state power controller (SSPC) overcurrent and short-circuit protection, BIT detection and safe parallel connection of a plurality of metal oxide semiconductor (MOS) tubes. The intelligent distribution box has the advantages of being capable of carrying out control on a direct current load, working modes and operation states of the load can be obtained at any time, and a protection parameter of the load is set according to needs. The intelligent distribution box can conduct independent controlling on a multi-path direct current load through a data bus, and also can conduct overriding control on the load through a manual control button, and the function of dual-redundancy controlling under an emergency state can be achieved.

Disclosed in the invention is an energy-harvesting-circuit-based piezoelectric-electromagnetic composite energy harvesting device. The invention relates to a piezoelectric-electromagnetic composite energy harvesting device capable of improving an output power, which belongs to the technical field of the new energy and power generation. The piezoelectric-electromagnetic composite energy harvesting device comprises a piezoelectric-electromagnetic composite energy harvesting device body and an energy collection circuit. The piezoelectric-electromagnetic composite energy harvesting device body consists of a housing, a coil, an upper permanent magnet, a piezoelectric ceramic material, a foundation beam, a tapered permanent magnet, a lower permanent magnet, an upper electrode, a piezoelectric plate, a lower electrode, a left piezoelectric plate upper electrode lead, a right piezoelectric plate upper electrode lead. The energy collection circuit includes an electromagnetic energy harvesting device energy collection circuit, a piezoelectric energy harvesting device energy collection circuit, and a charging circuit for realizing composite charging and preventing current returning. According to the invention, conversion from an alternating current to a direct current is realized; the output power supply is improved for a load. The energy harvesting device has advantages of green and pollution-free effects, high energy density, shortened charging time, high reliability, high environment adaptability, convenient operation control, and low maintenance cost and the like.

The invention discloses a novel AlGaN / GaN high-electronic-mobility transistor with the passivation layer charge compensation function. According to the novel crystal structure, charges are injected into a surface passivation layer between the grid electrode and the drainage electrode of the transistor, so that a charge compensation layer is formed, the charges exist on the surface of the transistor, surface electric fields are re-distributed through the electric field modulation effect on the premise that the AlGaN / GaN heterojunction polarization effect is not affected, a new electric field peak is generated, in this way, high electric fields on the edge of the grid electrode and at the drainage end are lowered, the surface electric fields tend to be even, and compared with a traditional structure, the breakdown voltage and the reliability of devices are improved remarkably; in addition, due to the fact that the charge compensation layer has the charge compensation function, the carrier concentrations of channels are re-distributed, the on resistance of the devices is reduced, and the output current is increased.

The invention provides a method for preparing a rare-earth aluminum alloy electrode material. Aluminum (CP level) with purity of more than or equal to 99.9 percent, serving as a raw material, is added with the following elements in percentage by mass: 0.05 to 49 percent of Zn, 0.05 to 0.15 percent of Ga, 0.05 to 0.20 percent of In, 0.01 to 0.10 percent of Pb, 0.05 to 0.30 percent of Mn, 0.05 to 0.30 percent of Sn and 0.20 to 0.50 percent of Re; and the mass content of impurities is less than or equal to 0.01 percent. According to the method, the rare-earth aluminum alloy electrode material is prepared by adopting doping of rare-earth elements, and the rare-earth aluminum alloy electrode material with excellent performance is obtained by solidification treatment of an external magnetic field so as to provide material support for practical application of an aluminum fuel cell. By the solidification treatment of the external magnetic field for the rare-earth aluminum alloy electrode material, the polarization performance of aluminum alloy electrodes can be improved, hydrogen evolution corrosion can be inhibited, the utilization rate of an anode is improved, and the working potential is increased.

The invention belongs to the technical field of engine control and particularly relates to a practical aircraft engine fuel electronic control system. A general closed-loop control system for providing positive and negative constant flow sources for aircraft engines is mainly applied to performance adjustment and static testing for an engine with an electro-hydraulic servo valve being served as an electro-hydraulic conversion device and can be used for primarily calibrating steady state characters of the engine. According to the general closed-loop control system for providing the positive and negative constant flow sources for the aircraft engines, a high-precision measuring module which provides excitation signals for an LVDT (Linear Variable Differential Transformer) collects a current position of the LVDT, a preset instruct state of the closed-loop system is changed, PID (Proportion Integration Differentiation) calculation is performed on the current position and a preset position of the LVDT under a closed-loop control state, and the flow of the engine is controlled. The closed-loop control system needs to maintain current values to be at steady state values during a testing process.

The invention discloses a solution method electrolyte thin film transistor and a preparation method thereof. The electrolyte thin film transistor is in a top gate top contact structure and comprises an insulating substrate, a semiconductor layer, an electrolyte insulating layer, a source electrode and a gate electrode, wherein the insulating substrate is positioned on the bottom layer of the electrolyte thin film transistor; the semiconductor layer is positioned above the insulating substrate; the electrolyte insulating layer is covered above parts of upper surface of the semiconductor layer; the source electrode and the drain electrode are respectively arranged on the semiconductor layer on two sides of the electrolyte insulating layer and are separated by the electrolyte insulating layer; and the gate electrode is arranged on the electrolyte insulating layer. The preparation method comprises the following steps of: carrying out patterning photo-crosslinking treatment; processing parts of electrolyte insulating layer by solvent; carrying out single-time vacuum vapor deposition; and simultaneously and respectively forming a gate electrode, a source electrode and a drain electrode by the surface height difference. According to the invention, low on-state voltage and big working current are realized, the processing technology is simplified, the cost is lowered, and the invention is suitable for the low-cost flexible electronic technology.

The invention provides a method for preparing PZT-based composite piezoelectric ceramic. The method includes the following steps that firstly, graphene oxide is prepared; secondly, PZT piezoelectric powder is wrapped with graphene oxide; thirdly, pre-sintering is conducted; fourthly, fine grinding is conducted; fifthly, discharge plasma sintering is carried out. The PZT-based composite piezoelectric ceramic comprises PZT and graphene, and the PZT-based composite piezoelectric ceramic has the electrical conductivity ranging from 0.5*10<-6>S / m to 2.3*10<-5>S / cm. The invention provides a piezoelectric power generation device comprising the PZT-based composite piezoelectric ceramic and application of the PZT-based composite piezoelectric ceramic in piezoelectric power generation.

The invention discloses a high-power two-wire pulse MIG inverter power supply system and a digital cooperative control method thereof. The system comprises a host power supply and a slave power supply which are connected through a CAN bus, each of the host power supply and a slave power supply comprises a main circuit and a control circuit, each main circuit is formed by parallel connection of two or more full bridge inverters and comprises an input rectifying and filtering module, a high frequency inverting module, a power transformation module and an output rectifying and filtering module, each input rectifying and filtering module is connected with a three-phase alternating current input power grid, each output rectifying and filtering module is connected with an electric arc load, and each control circuit comprises a voltage and current detection module, a fault protection module, a DSP digital cooperative control module, a human-machine interface module and a high frequency driving module. The output power, the welding speed and the fusion covering efficiency of welding wires are doubly improved by adopting the main circuits formed by parallel connection of the full bridge inverters and in combination with the DSP digital cooperative control technology.

The invention provides a linear motor driver which comprises a current feedback loop module, a power module, a detecting module, and a state analysis and control module. The motor driver is characterized in that the current feedback loop module comprises a preposing input stage module, an adder module, a low pass filter module, a power amplification feedback module, a loading module, a current sampling amplification module and a gain adjustment module which are connected in sequence; and the output signal of the gain adjustment module is connected on the input end of the adder module finally, thus forming a loop. The linear motor driver has the characteristics of high linearity, wide bandwidth, good stability, small interference to outside, and strong capacity of resisting disturbance, and is small in volume and low in cost. As the temperature coefficient of the drain-source resistance of the power amplifier is positive, when the temperature of the power amplifier rises, the current is limited, therefore, no thermal breakdown occurs, and consequently, no secondary breakdown occurs.

The invention discloses a charging control device. The charging control device comprises a voltage monitoring unit, a control unit and an execution unit, wherein the voltage monitoring unit and the execution unit are connected to the output end of a charger and the control unit respectively; the control unit is used for controlling the execution unit to increase or decrease the output current of the charger; the voltage monitoring unit is used for judging whether the drop value of the output voltage of the charger is greater than a preset threshold value and sending judging results to the control unit; the control unit is used for controlling the execution unit to decrease the output current of the charger when the drop value of the output voltage of the charger is greater than the preset threshold value; when the drop value of the output voltage of the charger is less than or equal to the preset threshold value, the control unit controls the execution unit to increase the output current of the charger. The invention further discloses a charging control method and a POS terminal of the charging control device. According to the charging control device provided by the invention, the charging efficiency of the charger can be effectively improved.

A long-stroke constant acceleration straight-line motor as well as a relevant control method, relates to the field of motors and control thereof. The invention resolves the problem in the prior constant acceleration straight line motors that the primary coil current is difficult to be controlled in the low speed section. The invention comprises a stator and a mover; wherein, the stator comprises a primary iron core and a primary coil; the motor is in a long-primary and short-secondary structure; the primary iron core and the primary coil in the stator is divided into a plurality of segments in the movement direction; each segment is also separated into a plurality of stages, and each stage is a separate unit; the separate unit can be controlled separately; the slot number, the tooth shape and the dimensions of primary iron cores in each stage are identical in each segment; total cross section area of conductors of the primary coil in each slot is the same; in adjacent segments in the movement acceleration direction of the mover, the number of serial connection turns of each phase of the primary coil increases successively; but the cross section area of the coil conductor decreases successively. The inventive motor structure can also lower power consumption, capacity and cost of driving systems, and improve the efficiency and the reliability thereof.

A semiconductor device having small leakage current and high breakdown voltage during reverse blocking, small on-state resistance and large output current at forward conduction, short reverse recovery time at shutoff, and high peak surge current value is provided. An n-type layer is made of a group-III nitride, and a p-type layer is made of a group-IV semiconductor material having a smaller band gap than the group-III nitride. The energy level at the top of the valence band of the n-type layer is lower than the energy level at the top of the valence band of the p-type layer, so that a P—N junction semiconductor device satisfying the above requirements is obtained. Further, a combined structure of P—N junction and Schottky junction by additionally providing an anode electrode to be in Schottky contact with the n-type layer also achieves the effect of decreasing voltage at the rising edge of current resulting from the Schottky junction.

The present invention discloses a magnetic force effect-based parallel composite beam piezoelectric-electromagnetic energy capture device. The magnetic force effect-based parallel composite beam piezoelectric-electromagnetic energy capture device comprises a shell, two sets of composite beams which are parallel to each other, two permanent magnets and two induction coils; the two induction coils are disposed on the opposite inner side walls of the shell; the two sets of composite beams are disposed between the two induction coils; each set of composite beams comprises a plurality of cantilever beams and a base connected with one end of each of the plurality of cantilever beams, the other ends of the cantilever beams being fixedly connected onto the inner side wall of the shell; the two permanent magnets are arranged on the bases of the two sets of composite beams respectively and directly face the two induction coils respectively; and the upper and lower surfaces of the cantilever beams are provided with piezoelectric sheets. The piezoelectric power generating device of the present invention can be more adaptive to random, broadband, low-frequency, large-amplitude and high-intensity vibration energy recovery in the environment.

A voltage regulator circuit for providing a substantially constant output voltage is disclosed. The voltage regulator circuit has a voltage regulator, a current sensing and comparing circuit, a capacitive load circuit, and a control circuit. The voltage regulator generates an output current in response to a control signal to provide the output voltage. The current sensing and comparing circuit senses the output current and outputs a result signal according to a sensed output current and a predetermined current value. The control circuit generates the control signal according to the comparison result to limit the output current. The capacitive load circuit provides the control circuit with a first capacitance when the voltage regulator circuit changes from a first mode to a second mode and provides the control circuit with a second capacitance when the voltage regulator circuit changes from the second mode to the first mode.

The invention discloses a double-source battery pack switching method and a system. The method comprises the following steps: acquiring a first end voltage of a currently used battery pack and a second end voltage of a to-be-switched battery pack in real time; in the normal driving process, if the difference value between the first end voltage and the second end voltage is within a first preset range, directly performing battery pack switching; otherwise, if the second end voltage is smaller than the first end voltage, adjusting the output vector of the vehicle motor to reduce the first end voltage, and when it is detected that the difference between the reduced first end voltage and the second end voltage is within a first preset range, switching the battery pack; and if the second terminal voltage is greater than the first terminal voltage, reducing the output power of the vehicle motor or controlling the motor to brake, so that the first terminal voltage is increased, and when the difference between the increased first terminal voltage and the second terminal voltage is detected to be within a first preset range, switching the battery pack. Circulation can be avoided or reducedin the battery pack switching process under the condition that a DC / DC converter is not needed.

The invention discloses an energy recycling system of an intelligent car. An external modularization composition structure is adopted, and the energy recycling system is divided into an energy recycling control module and an energy storage module. The energy recycling control module and the energy storage module are connected through a high-power cable and a control cable. The energy recycling control module comprises a car state acquisition module, a CPU control module, a DC / DC energy output module and a generator control unit. The energy storage module is composed of an energy storage unit and a voltage control circuit. The units of the energy recycling system are connected through an industrial control bus. By the adoption of the energy recycling system, energy recycling depth can be increased, oil saving efficiency is improved to 6%-10%, energy conversion can be conducted in the deceleration and acceleration process of the car, redundant energy can be recycled when the car is at idle, braking efficiency of the car is improved to a certain degree, and abrasion of a brake system is reduced.

The invention discloses a double-ring protection low drop out (LDO) linear voltage regulator comprising the following elements: an error amplifier used for switching dual-end input into single-end output, thus providing high output gain; an over-current protection circuit used for comparing output voltage with peak voltage, and using a feedback circuit to control a power tube, thus realizing over-current protection function; the power tube realized by a PMOS transistor common-source amplifier structure and used for providing sufficient gain for the LDO loop, and ensuring the LDO drop out voltage is the PMOS pipe leakage source voltage; a unit gain frequency compensation network used for generating zero point resistance. The conduction resistance of the PMOS pipe critical work point can be reduced to drop voltage, thus providing over-current protection effect, and the error amplifier can normally work; good stability is provided; the double-ring protection low drop out (LDO) linear voltage regulator has low input-output voltage difference, can stably work when voltage and temperature change, and has the over-current protection auxiliary function.

A photo-sensing device is disclosed, comprising a photoelectric conversion semiconductor thin film, thin films for ohmic contacts to be provided to form an incident light window on one face of the photoelectric conversion semiconductor thin film, first and second ohmic electrodes installed on the thin films for the ohmic contacts, a connection wiring for short-circuiting the first and the second ohmic electrodes, an insulating film provided on the other face of the photoelectric conversion semiconductor thin film, and a first electrode provided on the face of the insulating film that does not contact the photoelectric conversion semiconductor thin film.

The invention discloses a constant-flow blower fan and a control method thereof. The control method of the constant-flow blower fan comprises the steps that S100, when the rotating speed of the constant-flow blower fan is n and the value of an output current of a variable-frequency driver is less than a set value, the output current of the variable-frequency driver is increased; when the value of the output current of the variable-frequency driver is greater than the set value, the output current of the variable-frequency driver is decreased. The working current and voltage of the blower fan are controlled by controlling the output current of the variable-frequency driver, and therefore the rotating speed of the blower fan is controlled; after the rotating speed of the blower fan is changed, the corresponding air quantity will be changed, and therefore the air quantity of the blower fan is kept in a reasonable range, and using performance of the blower fan is improved.