1412 results about "Accumulator (energy)" patented technology

The mixed energy storage device for elevator includes super capacitor bank, accumulator set, super capacitor charging and discharging circuit, charging and discharging circuit for accumulator. Through super capacitor charging and discharging circuit, super capacitor bank is connected to DC bus in power supply system for elevator. Through charging and discharging circuit for accumulator, accumulator set is connected to DC bus. Using circuits for controlling charging and discharging super capacitor and accumulator, the invention realizes uninterrupted power supply and power buffering. Features are: minimizing installed capacity of super capacitor bank and accumulator set, optimizing working state of charging and discharging accumulator set, reducing number of charging and discharging cycle and prolonging service life etc. In the mixed energy storage device, accumulator set exchanges energy with DC bus only through one stage of DC/DC so as to raise efficiency of storing energy greatly.

The invention discloses a hydraulic transmission-based method and a hydraulic transmission-based device for storing energy and realizing stabilized voltage and constant frequency in wave power generation. In the device, a floating pendulum is connected with a hydraulic cylinder, high pressure oil outputted by a non-rod cavity of the hydraulic cylinder enters a high pressure energy storing device and an oil inlet of a variable motor through a control integrated valve and through a high pressure oil tube, low pressure oil outputted by an oil outlet of the variable motor enters a low pressure big-capacity energy storing device and returns to the rod cavity of the hydraulic cylinder through the control integrated valve, the main shaft of the variable motor is connected with a permanent magnet synchronous generator, and the permanent magnet synchronous generator is connected to a rectifying module and a direct-current electric energy charging-discharging control module and then connected to a stepless unload adjustable load and a storage battery. The high pressure energy storing device and the low pressure big-capacity energy storing device realize the energy storage by absorbing the fluctuation, caused by the change of transient waves, of pressure and flow rate. A controller realizes the pressure stabilization constant frequency by the stepless unload adjustable load and the displacement of the hydraulic motor respectively. The device has the advantage of making the wave power generating device output more smoothly, more free from influence of the wave impact and have higher efficiency.

The invention discloses a fuel cell thermal management system with heat accumulation and heating functions and a control method. The fuel cell thermal management system comprises water circulation systems including a small circulation waterway system, a large circulation cooling system, a deionized water circulation system and the like and a control system which takes an ECU (Electric Control Unit) as a core. According to the fuel cell thermal management system disclosed by the invention, the small circulation waterway system is capable of realizing a low-temperature heating function on a fuel cell by adopting a heat accumulator, so that compared with a traditional electric heater technology, the fuel cell thermal management system has the advantages that the control accuracy is higher, and the fuel cell thermal management system is more energy-saving and efficient; meanwhile, as the deionized water circulation system is adopted, an ion exchanger is skillfully designed on a degassing pipe of a large circulation waterway, a degassing function and a deionizing function of the fuel cell thermal management system are perfectly combined together, and the influence of a high-water-resistance ion exchanger in the prior art on a main circulation waterway is effectively avoided.

The invention provides a zero-consumption seawater desalination facility based on comprehensive utilization of solar energy and belongs to the technical field of seawater desalination. The facility comprises a bubbling evaporator, a saline water tank, a fresh water tank and a solar energy utilization device. A solar energy air type heat collector is connected with a bubbler to heat up air entering the bubbling evaporator; a solar heater is connected with the bubbling evaporator to heat saline water in the evaporator; a solar photovoltaic cell panel is connected with a water tank, an induced draft fan, a solenoid and an accumulator through a solar photovoltaic controller to provide power for the whole facility, and the accumulator serves as a standby auxiliary power supply. Once being generated by the bubbler, air bubbles are subjected to heat and mass transfer with saline water in the bubbling evaporator continuously during rising so as to absorb moisture. High-humidity air is introduced to the saline water tank from the bubbling evaporator to achieve condensing and back heating, and vapor is condensed to generate fresh water to flow into the fresh water tank while saline water is preheated. The facility utilizes solar energy comprehensively, is effective, and is simple in structure and easy to promote.

The invention relates to a design and manufacture method of valve-controlled sealed lead-acid accumulator for electric vehicle with high specific energy and deep cycle and long service life, wherein by the modification of a battery cover structure, the changes of charging/discharging state and temperature are monitored in real time for every 2V single battery of 4-24V of the whole accumulator; the positive and negative columns of the single battery are made of metal inserts; metal plates are connected between the metal inserts; the inserts and metal plates are all made of copper, aluminum and nickel and the like with densities less than the density of lead and conductivities better than the conductivity of lead; the surfaces of the inserts and the metal plates are all coated with lead, tin-lead or tin-lead-sliver alloy; the positive and negative pole plates are both thin pole plates; and 0.1%-2% of silica powder with an average grain diameter of 3-15 microns, 0.02%-0.5% of lignin and 0.5%-1.5% of conductive graphite are added in active substances which are diachylon; the use ratio of the active substances is greatly improved; ultra-fine glass fiber clapboards and a polyethylene (PE) clapboard are combined; and the accumulator in the invention is ensured to have the characteristics of high energy-density and deep cycle and long life.

The invention discloses an optimal scheduling model of a micro-energy grid with multi-energy storage under multi-time scales, which relates to the field of energy internet optimization operation. Themicro-energy network comprises three energy forms of electricity, heat and gas, including P2G equipment, a heat and power co-generation micro-combustion engine, an electric boiler, a gas boiler, an accumulator, a heat storage tank and a gas storage tank. The multi-time scale considers two time scales, one hour before the day and 15 minutes within the day. The process of establishing the optimal scheduling model of the micro-energy grid comprises the following steps: 1, determining the component parameters and the network parameters of the micro-energy network; 2, establishing an hour-level optimized dispatch model before that day of the micro-energy grid; 3, establishing a micro-energy grid intra-day 15-minute level optimal scheduling model. The invention effectively deals with the power fluctuation of the renewable energy and the load prediction error on the premise of ensuring the daily operation energy balance of each energy storage device, and improves the absorbing capacity of themicro-energy grid to the wind power and the photovoltaic.

The invention discloses a device for improving output efficiency of a miniwatt photovoltaic cell and a method thereof, belonging to the electrooptical technical field. In the invention, based on the optimum voltage control method, by arranging a supercapacitor and an optimum voltage controller between the photovoltaic cell and an energy accumulator and taking advantage of the characteristic of low essential resistance of the supercapacitor, the terminal voltage Vc of the supercapacitor directly affects the output voltage Vs of the photovoltaic cell; and by controlling the charge-discharge process of the supercapacitor to control the output voltage of the photovoltaic cell, the photovoltaic cell can work in a maximum power output area, thus effectively improving the output efficiency of the photovoltaic cell. Compared with the traditional method, the invention has the advantages of simple circuit and low self power consumption, and is suitable for being used in a miniwatt micro photovoltaic system.

The invention discloses an alloy material for a high-energy accumulator grid and a preparation method thereof. The alloy material is prepared from the chemical compositions in percentage by weight: 0.06-0.14 percent of Ca, 0.1-2.0 percent of Sn, 0.01-0.06 percent of Al, 0.01 -0.1 percent of Zn, 0.001-2.0 percent of rare earth and the balance of Pb, wherein the rare earth is one or two of Er and Ybor the mixture of Ho, Er, Tm and Yb. The preparation method comprises the following steps: adding Ca, Al and the rare earth to a crucible electric cooker according to the mixture ratio, and vacuumizing and then introducing nitrogen gas for protection at the temperature of 600-900 DEG C, and then smelting; adding Pb, Sn and Zn according to the mixture ratio, smelting at the temperature of 550-650DEG C and evenly mixing the mixture, sampling after the mixture is static (regulating alloy compositions according to the sample compositions), then fishing out dregs, keeping the temperature at the temperature of 550-650 DEG C for 0.5-3 hours, and then cooling; controlling the cooling speed at 10<2>K to10<5>K/S.

The invention relates to a hydraulic driving-based wind turbine and control method thereof. The control method of the wind turbine comprises the following steps of: realizing the transmission from an impeller to a generator by adopting a hydraulic driving mode; before synchronization, controlling the adjustment of the displacement of a variable hydraulic motor by a controller through detecting the rotating speed of a permanent magnet synchronous generator to realize the constant frequency control of the permanent magnet synchronous generator and enabling the output frequency of the permanent magnet synchronous generator to meet the synchronization requirement; and after synchronization, controlling the adjustment of the displacement of the variable hydraulic motor by the controller through detecting the rotating speed and the output power of the impeller to realize the variable speed control of the impeller and enabling the impeller to capture maximum wind energy. According to the hydraulic driving-based wind turbine disclosed by the invention, the stepless speed change can be realized by adopting the hydraulic driving mode; an energy accumulator can absorb energy fluctuation caused by transient wind speed, so that rigid impact on the wind turbine due to the fluctuation of wind speed can be avoided to a certain degree. On the basis of realizing the constant frequency control, the utilization rate of energy can be increased and the cost is saved.

The invention discloses a hybrid energy source system for an electric vehicle, and a control policy thereof. The system comprises a hardware circuit and a controller; the hardware circuit comprises abattery pack, a super-capacitor bank, a two-way DC/DC interface circuit one and a two-way DC/DC interface circuit two, of each the battery pack and the super-capacitor bank, connected with a DC bus, and an interface circuit between the battery pack and the super-capacitor bank; the controller comprises an interface circuit controller and an energy management controller; the interface circuit controller can maintain dynamic balancing of each battery monomer voltage in the charging/discharging process according to a battery pack charging/discharging voltage-sharing control program, and also canproduce a control signal to realize the direct energy exchange of two types of storage energy, so that the super-capacitor is operated in an excellent state of charge and can give full play to the power regulating capacity. The energy management controller realizes the reasonable distribution between an accumulator and the super-capacitor.

The invention discloses a brake valve electro-hydraulic drive system with an emergency shut valve function and a brake valve. The brake valve electro-hydraulic drive system includes a motor, a hydraulic pump, an integrated control valve, an actuating cylinder, an energy accumulator and a hydraulic oil tank, and is mainly characterized in that the system has the energy accumulator emergency function; the system works in two modes, namely, a speed regulating mode and a normal mode; when the system works in the speed regulating mode, the energy accumulator has a medium energy storage function when working normally, so that the motor power can be effectively reduced, and the speed of a switch is higher; the system has the self-diagnostic function, is safe and reliable, and can judge whether the system is working normally or not according to the real-time signals detected by a pressure sensor; the system integrates the manual emergency function, and when no power is provided, the valve can be manually opened and closed repeatedly.

A variable-speed volume-control direct-drive all-electric hydraulic excavator drive and energy recover system the control drive circuit of which includes the A, B, C energy source, boom cylinder control valve group, arm cylinder control valve group, bucket control valve, swing control valve, swing motor control valve group, left travel control valve, right travel control valve, eight 2-position 2-way valve, I and II 2-position 3-way valve, I and II accumulator. The drive control circuit adopts open control independent-cavity variable-speed pump-control volume direct-drive circuit. Each of the cavities of cylinder is controlled by an energy source and the pressure and flow rate of the cavities are adjusted by the rotational speed and torque control of the generator independently. The present invention is four-quadrant running and have advantages of high efficiency, high integrity, low consumption, redundancy energy source, no need for pilot supply, low noise, integrate recovery of kinetic and potential energy.

The present invention provides an emergency starting device, including a first output end and a second output end, wherein the first output end is used for being connected to a positive electrode of an accumulator battery in an engine starting system and the second output end is used for being connected to a negative electrode of the accumulator battery; the device includes a super-capacitor, a controller and a DC-DC booster circuit, wherein the controller receives first electrical signal from the accumulator battery and electrically connects the super-capacitor and the accumulator battery to start the engine with energy stored in the super-capacitor when the first electrical signal changes suddenly, the DC-DC booster circuit increases the output voltage of the accumulator battery to charge the super-capacitor. The invention further provides an emergency starting method accordingly. By using the super-capacitor, the controller and the DC-DC booster circuit the invention fits in various severe environments and can start an engine in emergency permanently and effectively.

The invention provides an energy-saving silencer, and relates to the technical field of silencers. The silencer comprises a silencer housing and a silencing core arranged in the silencer housing, wherein the silencing core comprises a wind power generator, wind wheel blades of the wind power generator naturally form spoilers, the spoilers are sleeved on a transmission shaft of the wind power generator in a penetrating way to drive the wind power generator to rotate so as to generate electricity. The silencing core, i.e., the wind power generator can directly transmit power to accumulator batteries through a power cord. In the silencer provided by the invention, the silencing core is composed of a plurality of elongated spoilers which are provided with vent holes and are sleeved on the transmission shaft of the wind power generator in a penetrating way, i.e., the wind wheel blades of the wind power generator, exhaust gas is eliminated by sequentially passing through the vent holes of the spoilers, noise generated by exhaust gas can be effectively reduced, and the silencing effect is obvious. The energy-saving silencer has the advantages of small structure, simplicity in manufacture and convenience for disassembly, cleaning and maintenance, not only has silencing and noise reduction functions, but also can generate electricity and provide electric energy. The silencer not only can be used on an exhaust pipe of an engine of an automotive vehicle, but also can be used on exhaust pipes of other internal combustion engines, boilers, tractors, internal-combustion electric generators, aerodynamic equipment, and the like.