200results about How to "Improve energy storage capacity" patented technology

The invention discloses a novel flywheel energy storage device which is characterized in that a rotary shaft is arranged in the internal center of a vacuum container; a permanent magnetic radial bearing is embedded in the upper part of the rotary shaft; the middle and lower part of the rotary shaft are sleeved by a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor and radial and axial permanent magnet biased magnetic bearings in sequence from top to bottom; the single-winding outer rotor magnetic suspension switch reluctance motor is embedded in the inner side of the lower end of the flywheel; each set of windings is independently controlled, and radial two-degree-of-freedom suspension force can be provided in addition to electrical/power generation functions. According to the novel flywheel energy storage device, by utilizing the characteristic that the single-winding outer rotor magnetic suspension switch reluctance motor can directly drive the flywheel, and a high-speed self-suspension function, and organically combining the characteristics of good unloading property and controllable suspension of the axial permanent magnet bearing, the radial permanent magnet bearing and a hybrid magnetic bearing, the five-degree-of-freedom, low-loss and high-reliability suspension of the flywheel are realized, the running speed of the flywheel is increased, and the power consumption and volume of a system are reduced.

The invention discloses a flywheel energy storing device. The device includes a vacuum container arranged on the outer layer. A rotary shaft is arranged in the center of the vacuum container. A radial-axial permanent magnetic bearing is nested in the upper end of the rotary shaft. The lower end of the rotary shaft is sleeved with a flywheel, a single-winding outer rotor magnetic suspension switch reluctance motor, and a permanent magnetic bias radial-axial magnetic bearing successively from top down. The rotary shaft penetrates through the center of the flywheel and is connected with the flywheel. The flywheel is nested in an outer rotor of the single-winding outer rotor magnetic suspension switch reluctance motor. According to the invention, by combining that the single-winding outer rotor magnetic suspension switch reluctance motor can drive the flywheel directly and has a high-speed suspension function with that the radial-axial magnetic bearing and a hybrid magnetic shaft have characteristics of controllable suspension in forced uninstallation, five degree of freedom and high-reliability suspension of the flywheel are realized. Besides, operation speed of the flywheel is increased and system power consumption and size are reduced.

The invention discloses a balance control method of a lithium-ion battery set. Internal parameters of each single battery of the battery set and an accurately estimated SOC value serve as the reference quantity of a battery set balance control algorithm; the safety problem possibly caused by overcharging and overdischarging of the battery set is resolved through the balance control scheme, the service life of the battery set is prolonged, and the performance of the battery set is improved. Through the balance control method of the lithium-ion battery set, balance control can be carried out on the work state and performance of the lithium-ion battery set, an active balance control method based on the SOC estimation value is built, and the intelligent balance control method of the lithium-ion battery set is designed through the electronic technique and the computer control technology. The implementation of the balance control method of the lithium-ion battery set has great significance for promoting the popularization of lithium-ion batteries, improving the energy storage capacity and the utilization rate of the lithium-ion battery set, and prolonging the cycle life of the lithium-ion battery set, overcomes the defects of a lithium-ion battery set balance control system, and promotes the application and popularization of the new energy electric car technology based on lithium-ion batteries.

The invention belongs to the technical field of transitional metal sulfide-carbon materials, and particularly relates to a tungsten disulfide/carbon nanofiber/graphene composite material and a preparation method thereof. The preparation method comprises the following steps: preparing a polyacrylonitrile nanofiber membrane in an electrostatic spinning manner; wrapping a polyacrylonitrile nanofiber with a graphene oxide through a solution immersion method; preparing a carbon nanofiber/graphene composite membrane through a high-temperature carbonization; and finally growing a tungsten disulfide nanosheet on the carbon nanofiber/graphene in situ through a one-step solvothermal method. The prepared tungsten disulfide/carbon nanofiber/graphene composite material has the advantages of stable chemical property, good conductivity, excellent mechanical property and the like, and can be used as an ideal high-performance electric catalytic material and an electrode material for new energy devices of a lithium-ion battery, a solar battery and the like.

The invention discloses a flywheel battery supported and driven by a split magnetic levitation switch reluctance motor. The flywheel battery comprises an enclosure and a vacuum cavity, wherein an axial permanent magnet bearing, two radial permanent magnet bearings, a motor A, a flywheel rotation shaft, a flywheel rotor, a motor B and an axial electromagnetic bearing are contained in the vacuum cavity; the flywheel rotor is fixedly sleeved at the axial center of the flywheel rotation shaft; the axial permanent magnet bearing and the axial electromagnetic bearing are arranged at the upper and lower ends of the flywheel rotation shaft respectively; the two radial permanent magnet bearings are located below the axial permanent magnet bearing and above the axial electromagnetic bearing respectively; the motor A and the motor B are arranged between the two radial permanent magnet bearings and the flywheel rotor respectively; a torque winding of the motor A and a torque winding of the motor B are connected in series, and the levitation windings are independently wound; the axial electromagnetic bearing provides controllable levitation with axial degree of freedom; the levitation winding is excited to generate radial levitation force; and the radial levitation force and the radial restoring force of the radial permanent magnet bearing provide controllable levitation with more than 4 radial degrees of freedom, thereby improving the energy storing efficiency.

A capacitor based energy storage system (CBESS) and methods of using it are disclosed. The CBESS uses meta-capacitors in its capacitive energy storage devices (CESD) to configure capacitive energy storage cells (CESC), which are used to configure capacitive energy storage modules (CESM) to achieve the CBESS's function as an uninterruptible power supply. The CBESS is connected to a power generation system (PGS), a load, and a power grid. When the grid is in an abnormal state, the CESM is simultaneously charged with power from the PGS and used to supply power to the load. If a remaining amount of power of a CESM is less than a predetermined level, the CESM is charged with power from PGS or grid. The CBESS interfaces with a computer system or network to buy or sell electricity to the grid depending on grid electricity cost and CESD charging states.

The invention discloses a power generation control method for an engine and a driving motor of a hybrid power bus. The power generation control method for the engine and the driving motor of the hybrid power bus comprises the following steps that the current speed and required traction torque of the bus are obtained; the required traction torque is determined to be within the range of the economical torque of the engine, and the difference value between the required traction torque and the economical torque of the engine is set to be the target value of the brake torque of the driving motor; the target value of the brake torque of the driving motor is adjusted, so that the absolute value of the brake toque of the motor is made to be larger than the minimum power generation torque of the motor and smaller than the maximum power generation torque of the motor; in the constrained time, the brake torque of the driving motor is changed to the numerical value of the brake torque of the motor from zero according to the quantization step, and the absolute value of the brake torque of the driving motor is set not to exceed the maximum torque which is allowed to be output at the current rotating speed of the driving motor; and the sum of the economical torque of the engine and the brake torque of the driving motor is used as the target torque of the engine.

The invention relates to a household electrical appliance, comprising a flash evaporation type steam generator (12) supplied by a reservoir (11). The steam generator (12) is connected to a steam distribution pipeline. The invention is characterized in that the steam distribution pipeline comprises a pressurized check valve (150) of a distribution pipe (15) connected to a fitting (1) used for fabric treatment; the calibrated pressure of the pressurized check valve (150) makes that only when the pressure of the distribution pipe (15) is higher than or equal to a predetermined threshold value, the steam can flow through along the direction of the fitting (1) used for fabric treatment; The fitting used for fabric treatment comprises a switch of manual control which allows to interrupt the diffusion of the steam through the fitting (1) used for fabric treatment based on order.

The invention belongs to the technical field of transition metal sulfide/carbon materials, and particularly discloses a cobalt zinc sulfide/graphene/carbon nanofiber composite material and a preparing method thereof. The preparing method includes the steps that a polyacrylonitrile nanofiber film is prepared through electrostatic spinning, polyacrylonitrile nanofibers are wrapped by graphene oxide with a solution soaking method, then a graphene/carbon nanofiber composite film is prepared through high temperature carbonization, and cobalt zinc sulfide nanometer particles grow on the graphene/carbon nanofibers with a one-step hydrothermal method in an in-situ mode. The prepared cobalt zinc sulfide/graphene/carbon nanofiber composite material is controllable in morphology, has the high specific surface area and the good electrical conductivity, and can serve as an ideal high-performance electro-catalysis material and an electrode material of new energy devices such as a lithium-ion battery and a solar cell.

The invention belongs to the technical field of transition metal oxide-carbon materials, and specifically provides a zinc cobalt oxide/graphene/carbon nanofiber composite material and a preparation method thereof. The preparation method provided by the invention comprises the following steps: preparing a polyacrylonitrile nanofiber membrane through electrospinning, coating graphene oxide on polyacrylonitrile nanofiber through a solution immersion process, preparing a graphene/carbon nanofiber composite membrane through high-temperature carbonization, and finally subjecting the graphene/carbon nanofiber to one-step hydrothermal process so as to realize in-situ growth of zinc cobalt oxide nanoparticles. The zinc cobalt oxide/graphene/carbon nanofiber composite material prepared by using the method provided by the invention has controllable morphology, high specific surface area and excellent conductivity, can be used as an ideal high-performance electrocatalytic material and an electrode material for new-energy devices like lithium ion batteries and solar cells.

The invention belongs to the field of electrochemical materials, and discloses a graphene/carbon black composite material, a preparation method and an application thereof. The electrode material comprises, by mass, 50-85% of graphene and 15-50% of carbon black. According to the graphene/carbon black composite material, agglomeration of the graphene lamellas is low, such that the high energy storage capacity is provided when the composite material is adopted as the electrochemical capacitor electrode material.

The invention discloses a solar double effect absorption heat pump system combining three phase energy storage and belongs to the field of solar heat pumps. By taking a lithium bromide aqueous solution as an energy storage medium, a three phase energy storage system and a generator in a conventional solar double effect absorption heat pump system are connected in parallel, a heat collecting mediumin a tank type solar heat collector provides heat to the energy storage tank and a high pressure generator, separately, and on the basis of meeting the heat requirement of users, residual solar heat-collecting capacity is stored in the three phase energy storage system in a form of chemical potential energy, so that the solar energy is utilized efficiently. The system disclosed by the invention avoids risks caused by crystallization in serial connection of a two phase energy storage device and the generator in the prior art, and the load regulating action on a solar air conditioner by the energy storage system can be achieved by means of high energy storage densities of vapor, liquid and solid phases. The size of the energy storage tank is reduced by more than a half compared with that ofthe two phase energy storage mode as a result of a 50% crystallization rate. The system is simple, convenient and flexible to regulate and easy to transform a common solar double effect absorption heat pump system into the energy storage type solar double effect absorption heat pump system.

The invention relates to a composite sealing ring for a low-temperature valve, and belongs to the technical field of fluid control valves. The sealing ring comprises a sealing ring jacket made of modified polytrifluorochloroethylene, a hollow metal energy storage spring with a circular section is clamped in an annular groove with a C-shaped section formed by the section of the sealing ring jacket and comprises a spring strap wound outside a metal rubber ring with the circular section, the ratio of the inner distance between two surrounding edges in a natural state to the diameter of the metal energy storage spring is 0.7-0.9, the ratio of the maximum outer distance formed by unfolding the two surrounding edges after clamping the metal energy storage spring and the length of a base edge to the depth of a sealing groove to be embedded is 1.1-1.3, and metal materials in the metal rubber ring are as same as those of the metal energy storage spring. The sealing ring appropriately solves the problem of serious reduction of sealing specific pressure caused by the expansion coefficient difference between a nonmetal material and a metal material at a low temperature and solves the problem that the materials are hard and brittle at a deep-cold temperature, and reliable sealing of the valve in a -196 DEG C to -269 DEG C ultra-low temperature environment can be practically achieved.

A compact-type liquid dehumidification air conditioner in two-stage parallel connection which is driven by the solar energy comprises a two-stage dehumidification module, a regeneration module, a first evaporation cooling device, a cross flow heat exchanger and a second evaporation cooling device. The two-stage dehumidification module, the cross flow heat exchanger and two evaporation cooling devices constitute the upper layer of the solar compact type of liquid dehumidification air conditioner in two-stage parallel connection; the regeneration module constitutes the lower layer of the liquid dehumidification air conditioner. The modules are connected through the liquid pipeline or the air duct. Compared with the traditional liquid dehumidification air conditioner, the layered design of the air conditioner saves the space greatly; the parallel arrangement of the dehumidification module is convenient for the regulation of the gas and liquid flow ratio of each level; the operation with big concentration difference is in favor of the complete exertion of the liquid dehumidification capability, which realizes the energy storage and saving purpose. Therefore the compact-type liquid dehumidification air conditioner in two-stage parallel connection which is driven by the solar energy improves the deterioration of the dehumidification effect due to the gas liquid mixing heat during the dehumidification process.

The voltage compensator is composed of following parts: for charging module of superconducting energy storage, charging module is composed of a rectification bridge in three phase, a filter and a electronic switch; connected to DC side of charging module and inversion module in parallel and in use for storing electrical energy in DC form, the module of superconducting energy storage consists of a superconducting coil, a electronic switch, a power diode and a capacitance; in use for outputting offset voltage, the inversion unit includes inversion bridge in three phase; in use for connecting dynamic voltage compensator to power system, the isolation filtering unit includes three pieces of isolating transformer and three capacitors. The disclosed dynamic voltage compensator meets the need for compensating voltage fall off at short time in power system. Comparing with prior art, the disclosed dynamic voltage compensator possesses better dynamic response and longer compensating time.

The invention discloses a boron-nitrogen co-doped carbon/manganese oxide composite nanosheet material, a preparation method, and an application of the composite nanosheet material in capacitive deionization or in an electrode material of an electrochemical energy storage device. The preparation method comprises the following steps: adding boric acid into chitosan hydrogel, uniformly mixing the boric acid and the chitosan hydrogel, freeze-drying the mixture, and carbonizing the mixture to obtain boron-nitrogen co-doped carbon nanosheets; and putting the boron-nitrogen co-doped carbon nanosheetsin a potassium permanganate solution for reaction to obtain the boron-nitrogen co-doped carbon/manganese oxide composite nanosheet material. The boron-nitrogen co-doped carbon/manganese oxide composite nanosheet material is of a mutually connected three-dimensional sheet structure. The preparation method provided by the invention is simple and feasible, the reaction conditions are mild, and the carbon nanosheets are of a three-dimensional mutual connection structure. The prepared carbon/manganese oxide composite nanosheet material is rich in nitrogen and boron and is of a mesoporous-dominatedporous structure. The composite nanosheet material shows a good prospect in the fields of preparation of capacitive deionization and super capacitor electrodes and catalyst carriers.