275results 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 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 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 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 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 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 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.

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.