370results about How to "High specific power" patented technology

A carbon nanotube paper is prepared from carbon nanotubes through adding them to acid, heating or thermal reflux, and/or ultrasonic stirring, removing impurity, diluting in water, filtering, washing the filtered cake, dispersing the carbon nanotubes in water by ultrasonic stirring, spreading on carrier, and drying. It has regular structure, high uniformity, purity and electric conductivity, and enough mechanical strength.

The invention discloses a hydraulic auxiliary driving and braking system and a control method thereof. The hydraulic auxiliary driving and braking system and the control method solve the problems that the existing commercial cargo carrying vehicles are poor in trafficability on broken road surfaces and unstable in braking when the time of service braking is long. The hydraulic auxiliary driving and braking system comprises an engine, a clutch, a gearbox, a rear drive axle, two front wheels, an accelerator pedal, a brake pedal, a frame, a power takeoff, an axial oblique plate type high pressure variable pump, a three-position four-way electromagnetic reversing valve, an electro-hydraulic proportional relief valve, a heat exchanger, a relief valve group, two hydraulic quantitative motors which have the same structure, an oil tank and an electronic control unit; the axial oblique plate type high pressure variable pump is in pipe connection with the three-position four-way electromagnetic reversing valve which is in pipe connection with the relief valve group, the electro-hydraulic proportional relief valve and the oil tank; the two hydraulic quantitative motors which have the same structure are in pipe connection with the axial oblique plate type high pressure variable pump. Meanwhile, the invention provides a control method of the hydraulic auxiliary driving and braking system.

The invention discloses a dual-power supply management system and a dual-power supply management method for an electric vehicle. The dual-power supply management system comprises a storage battery, a power electronic switch, a supercapacitor bank, a bidirectional DC-DC (Direct Current-Direct Current) converter and a digital signal processor, wherein the storage battery is connected to an inverter through the power electronic switch; the power electronic switch controls the charge, discharge and switching on or off of the storage battery under the control of an acquired PWM (Pulse Width Modulation) signal, the supercapacitor bank is connected to the inverter through the bidirectional DC-DC converter; the bidirectional DC-DC inverter is used for increasing or reducing the voltage in a positive direction and a negative position under the control of the acquired PWM signal; and the digital signal processor is connected with the storage battery, the supercapacitor bank, a motor, an accelerator, a brake and direct current buses among the inverter, the power electronic switch and the bidirectional DC-DC inverter to generate a PWM signal for controlling the power electronic switch and the bidirectional DC-DC inverter. According to the dual-power supply management system, the supercapacitor bank and the storage battery are used in parallel, and thus the defects that the storage battery is low in specific power, does not support a large current, and the like are effectively made up.

The invention discloses an unsymmetrical lithium iron phosphate battery, the negative pole of which takes lithium titanate as the main active substance, belonging to the technical field of non water electrolysis liquid lithium ion battery or hybrid battery. The battery comprises an anode, a cathode, a diaphragm and electrolyte; wherein the main active substance of the anode is lithium iron phosphate powder, lithium iron titanate powder added with activated carbon or lithium iron phosphate powder added with carbon nanotube, the anode material also comprises caking agent, conductive agent and dispersing agent; the main active substance of the cathode is lithium titanate powder, compound copper, argentum, or lithium titanate powder or semi-conductive modified lithium titanate power, the cathode material also comprises the caking agent, the conductive agent and the dispersing agent. The caking agent is polyvinylidene fluoride, the conductive agent is acetylene black, and the dispersing agent is N-methyl pyrrolidone. The invention has good discharging property under heavy current, and can maintain high specific power and high specific energy.

The invention relates to a high-specific-energy/high-specific-power type super battery, consisting of a positive electrode, a negative electrode, a diaphragm between the positive electrode and the negative electrode, and organic electrolyte, wherein the positive electrode is formed by parallel connection of two types of electrode pieces, i.e. an electrode piece which adopts a lithium-ion-embedded compound in a lithium ion battery as an active material and an electrode piece of a porous carbon material in a double electric layer super capacitor, the negative electrode adopts a negative electrode carbon material of the lithium ion battery, and the electrolyte is of an organic solvent containing lithium ion salt electrolyte. The high-specific-energy/high-specific-power type super battery has high energy density and power density simultaneously, wherein the specific energy can be up to 50-110wh/kg, and the power density can be up to 450-8000w/kg; and the high-specific-energy/high-specific-power type super battery can be widely applied in the fields such as electric automobiles, electric tools, solar energy storage, wind energy storage, portable household appliances and the like.

The invention provides an internally combined super capacitor which comprises an anode, a cathode, a diaphragm and electrolyte. The internally combined super capacitor is characterized in that the anode and the cathode are composed of active substances and perforated current collectors, the active substance of the anode is a mixture containing built-in lithium metal oxide and active carbon, and the active substance of the cathode is hard carbon. According to the internally combined super capacitor, through the energy storage potential matching technology of the anode and the cathode, the current collectors of the anode and the cathode respectively adopt perforated cathode foil and perforated copper foil, and electrochemical pre-doping of lithium ions is performed on the hard carbon of the cathode through a third electrode, so that the initial charged state of the hard carbon reaches 30% to 80%. According to such a finally obtained super capacitor battery, the characteristics of high specific power, long service life and quick charge of the super capacitor are kept, and the specific energy is greatly increased. Compared with a traditional lithium ion capacitor, the internally combined super capacitor has a great application prospect, and the characteristic of the super long cycle life is reserved. The working voltage of the internally combined super capacitor can reach 4.2 V, the specific energy can reach about 50 Wh/kg, the specific power can reach about 10, 000 W/kg, and the cycle life can reach 50, 000 times.

A permanent magnetism synchronous hub motor for electrically driven vehicle direct drive comprises shafts, a left end cover, rotors, stators, a right end cover, a rotating transformer, bearings are arranged on the shafts, inner rings of the left end cover and the right end cover are connected with the bearings in interference fit, stators are hot sleeved on the support of the shaft, the left end cover, the right end cover and the rotors are jointed together by bolts, the rotors are composed of rare earth magnet steels at interval adhering in the inner wall of the support by the magnet steel glue. The invention can be mounted in the vehicle wheel hub for directly driving the vehicle wheel and save traditional drive devices, thereby simplifying the whole vehicle structure, improving the drive efficiency and using the space effectively; the invention is an outer rotor motor without reduction gear mechanism, has small volume, large power, large starting moment, good control performance and low energy consumption, can reduce the whole vehicle weight and the maintenance cost and improve continued mileage and battery life.

The invention relates to a nitrogen-containing binder for sulfur-lithium batteries and a preparation method thereof. The binder is a nitrogen-containing cyclodextrin polymer water-based binder with a three-dimensional network structure. The existing three-dimensional network structure can well bear the mechanical pressure brought by sulfur-lithium batteries in the charging and discharging process due to volume change, introduced nitrogen-containing functional groups can effectively inhibit the problems of dissolution and shuttle effect of polysulfide ions in electrolyte, a number of hydroxyl groups exist in the cyclodextrin and have strong hydrogen-bond interaction with anode material particles, and the stability of pole pieces can be maintained. In addition, the binder also has a role of increasing guide ions. Therefore, the binder can effectively solve the problem that a positive polysulfide material in the sulfur-lithium batteries is unstable in organization structure, the utilization rate of composite material active matter and the rate capability of the active matter can be improved, and accordingly the specific power, specific energy and cyclicity of the batteries can be improved.

The invention discloses a blade-typed compressor or vacuum pump which comprises a shell, a rotor, two same blades, four same sealing strips and two same cushion blocks, wherein, the rotor is positioned in the center, the shell is positioned in the exterior, the blades are positioned at two sides of the rotor, arranged in a hollow circular ring of the opposite angle of the shell to form an angle with the rotor, and tangent with the side of the cone of the rotor, the sealing strips are positioned between the rotor and the blades, one side of the plane of the sealing strip is jointed with the rotor, while one side of the cylindrical surface thereof is jointed with the blades, and the cushion blocks are positioned in the hollow circular ring of the opposite angle of the shell to just fill the opening formed by the blades, the rotor and the sealing strips. The invention has the advantages that: 1) all the sealing points are surface sealing, 2) the output volume is large, the pressure and efficiency are high, 3) the specific power is high, 4) the structure is compact and the processing is comparatively easy, and 5) the production cost is comparatively low.

The invention discloses a high-performance multiple-blade hydraulic motor which comprises a casing, a rotor, vanes, seal strips, oil distribution cones and cushion blocks, wherein the rotor is arranged in the center; the casing is arranged at the external part; the oil distribution cones are arranged in the hollow circular-truncated-cone surfaces at the two ends of the rotor; the vanes are arranged in hollow circular rings at the opposite angles of the casing and also arranged in the grooves of the rotor, and form angles together with the rotor; one plane of each vane is fitted with the circular-truncated-cone side surface of the corresponding oil distribution cone; the seal strips are arranged between the rotor and the vanes, one side of the plane of each seal strip is fitted with the rotor, and one side of the circular-truncated-cone-surface of each seal strip is fitted with the circular-truncated-cone surface E1 of the corresponding vane; the cushion blocks are arranged in the hollow circular rings at the opposite angles of the casing, and gaps formed by the casing, the vanes, the rotor and the seal strips are just filled up with the cushion blocks. All sealed parts adopt face seal; the vane type hydraulic motor is small in size, large in torque, high in efficiency and specific power, compact in structure, easier to process, lower in cost and long in service life.

The invention relates to a power unit applying new energy of lithium ion batteries to a transplanter and belongs to the technical field of agricultural machinery. A transplanter is formed by connecting a lithium ion battery power system and a seed planting device. The lithium ion battery power system charges a lithium ion battery with a power supply for storing electric energy. When a power switch of the lithium ion battery is turned on, the lithium ion battery begins to supply power which is then converted to mechanical energy to be transmitted to the seed planting device through a transmission belt. Through the motion of parts of the seed planting device, the seed planting device walks in a paddy field to convey seedlings, grasps seedlings and plants seedlings. The transplanter has an LED for illumination behind a seedling box plate to find missed seedling planting and clear fault timely, so the quality of mechanical seedling planting is improved and the operation time for mechanical seedling planting in field is prolonged.

The invention provides a carbon-coating titanium based nano array material. The carbon-coating titanium based nano array material comprises a conductive substrate (1), titanium based nano arrays (2) and an unformed carbon layer (3); the titanium based nano arrays (2) are vertically arranged on the surface of the conductive substrate (1) and interconnected to form an integral structure; the unformed carbon layer (3) completely uniformly wraps the surfaces of the titanium based nano arrays (2). The invention further provides a preparation method of the nano array material, and the application of the nano array material in electrochemical energy storage of a super-capacitor. The carbon-coating titanium based nano array material has the characteristic of sequentially-arranged housing-kernel nano structure; the carbon-coating titanium based nano array material can be directly applied to the electrode material of the super-capacitor and has the electrochemical electricity storing performances of quick charging and discharging and high capacitance.

The present invention provides a winding lithium paste battery. The winding lithium paste battery has a battery cell formed by winding of a positive plate and a negative plate, the electrode active conductive material layer of the electrode piece comprises non-bonded and fixed electrode active conductive particles. The winding lithium paste battery further comprises a leakage preventing portion, the leakage preventing portion is arranged at the edge of the positive plate and/or the negative plate or arranged on a housing to prevent the positive pole active conductive particles in the positivepole active conductive material layer from being leaked from the positive plate and/or prevent the negative pole active conductive particles in the negative pole active conductive material layer frombeing leaked from the negative plate. The winding lithium paste battery is more compact in structure, can regulate the shape for the application occasions, and is convenient and flexible in application. Besides, the winding lithium paste battery employs the uniformly distributed multi-tab group or full-tab design to effectively improve the current conduction capacity, improve the current distribution and improve the utilization rate of the electrode active conductive materials.

This invention belongs to capacitor technique field, which in detail is a new electrochemistry super capacitor. The capacitor combines the ion imbed to off imbed mechanism of the lithium ion battery and the double electric layers mechanism into one energy storage device, wherein its negative electrode adopts lithium ion imbed compound material with low imbed level and the positive electrode adopts active carbon or hole carbon to form an anisomerous super capacitor. Its negative electrode materials adopts nanometer sharp crystal rock Li#-[8x/(x+4)]Ti#-[8/(x+4)]O#-[4] or one or multiple other metal elements mixed compound.

The present invention discloses one kind of completely water lubricated pure water hydraulic axial plunger pump/motor, which adopts filtered natural water, including fresh water and sea water, as work medium and consists of mainly one casing and one rotary cylinder inside the casing. The cylinder has odd holes parallel to the driving/outputting shaft and distributed in the same circle; plunger sliding shoe assembly with plunger inside the cylinder holes, flow distributing sleeve and floating thrust disc inside corresponding hole, center spring with one end holding the flow distributing disc and the other end holding the sliding shoe to the inclined disc, and driving/outputting shaft interference fitted to the cylinder. The device of the present invention has all the friction pairs lubricated and cooled with water, and has small radial size, small volume, light weight and great specific power.

The invention relates to a hydraulic excavator control system, particularly to an excavator control system with oil hybrid power, and belongs to the technical field of engineering machinery. The system comprises hydraulic pumps (1), an engine (2), a main control valve (3), a boom cylinder (4), a rotary motor (5), a rotary energy recovery valve (6) and a movable arm potential energy recovery valve (10), wherein the rotary energy recovery valve recovers the overflowing energy of the rotary motor into a rotary energy accumulator (7); the movable arm potential energy recovery valve recovers the potential energy of the boom cylinder into a movable arm energy accumulator; oil outlets of the rotary energy accumulator and the movable arm energy accumulator are both connected with an energy release control valve, recovered energy is controlled to be transported to an auxiliary motor (11), and the auxiliary motor and the engine jointly provide power for the hydraulic pumps. Through the adoption of the system disclosed by the invention, the movable arm potential energy and the rotary overflowing energy can both be recovered into the energy accumulators and can provide auxiliary power for the system when required, and the lost energy of the excavator system can be furthest recovered.

The present invention related to a novel process for accelerating the breeding and conversion of fissile fuel in various types of nuclear reactors. In said process a movable nuclear fuel ball bed filled with a coolant creeps through the reactor core. The said process could provide higher specific power per unit fuel volume inside the reactor core and proceed on-line refueling, thus requires much less initial fissile fuel inventory per unit power output as compared with the traditional breeding or conversion reactors. The said process has full inherent safety characteristics and could follow the external power demand with the inherent negative temperature coefficient of reactivity. The said process, therefore, is a more efficient and economic approach to meeting the enormous demand of fissile fuel for the forthcoming “second nuclear era”.

The invention provides a stator for an axial clearance type motor and the axial clearance type motor. Stator teeth stator windings are symmetrically arranged on the two end faces of the stator to support the axial clearance type motor to adopt a dual-rotor mode which can make the stress of a rotating shaft balanced, so that improvement in the bearable maximum torque and rotating speed of the axial clearance type motor is facilitated. In addition, a stator slot formed on the stator replaces a collector ring and a cooling shell, so that the structure of the axial clearance type motor can be simplified. Moreover, clearance slots of the stator are equal in width along a radial direction, so that the utilization of air clearances is improved; and chambers are formed at the end part edges of the stator teeth of the stator, so that the dispersion of lines of magnetic force can be suppressed. Therefore, the specific power of the axial clearance type motor can be improved.