205results about How to "Improve dynamic properties" patented technology

The invention discloses a built-in and suspension integrated hub motor drive electric wheel. The electric wheel comprises a hub motor, a brake, a wheel, a damping mechanism and a speed reduction mechanism, wherein the speed reduction mechanism comprises a sun wheel, a planet wheel, a planet carrier and a gear ring; the damping mechanism comprises a first elastic element and a second elastic element; and the hub motor is connected with a vehicle through the first elastic element, and is connected with a supporting shaft of the wheel through the second elastic element. Compared with the prior art, the electric wheel has the advantages that the electric wheel has a compact structure, is light in mass and high in power density and can be easily distributed on the wheel; the dynamic properties and the safety of the vehicle are remarkably improved; and simultaneously, the dynamic characteristics of an electric wheel driving system are effectively improved, the grounding performance of the wheel is improved, and the service life of parts is prolonged.

The invention discloses a high-nickel ternary lithium ion power battery electrolyte and a high-nickel ternary lithium ion power battery. The electrolyte includes a non-aqueous organic solvent, a lithium salt, a conductive additive, a film forming additive and an infiltration additive, wherein the conductive additive is lithium difluorophosphate, the film forming additive is ethylene sulfate, and the infiltration additive is at least one of fluorophosphazene and fluoroethylene carbonate; and synergism and mutual promotion of the three additives makes an excellent SEI film be formed on the surface of an electrode and effectively promotes all dynamic processes in the lithium ion battery. The power battery electrolyte has the advantages of good lithium ion transmission characteristic, good oxidation resistance, guaranteeing of high power characteristic and good cycle performances of the power battery, and high safety.

The invention discloses lithium secondary battery overcharge protection electrolyte and a lithium secondary battery. The electrolyte contains electrolyte lithium salts, non-water organic solvents, film forming additives and overcharge protection additives, wherein the film forming additives are at least one kind of materials from TMSP (tris(trimethylsilyl) phosphate) and DTD (dioxathiolane 2,2-dioxide); the overcharge protection additives comprise oxidation and reduction shuttle type overcharge protection additives. The overcharge protection additives used in the electrolyte do not take part in any reaction process at the normal work voltage of 2.75 to 4.35V; when the battery charging voltage exceeds 4.4V, the oxidation and reduction shuttle type overcharge protection additives generate oxidation and reduction shuttle current distribution and voltage limitation on the surface of an electrode; the voltage is controlled to be within a range; the intense decomposition of the electrolyte inside the battery due to too high voltage can be avoided; further, the occurrence of safety problems of combustion, explosion and the like of the battery can be prevented.

The invention discloses a non-aqueous electrolyte of a high-nickel ternary lithium ion battery and a high-nickel ternary lithium ion battery containing the electrolyte, which relates to the technicalfield of lithium ion batteries. The high nickel ternary lithium ion battery electrolyte comprises an electrolyte lithium salt, a non-aqueous organic solvent and a film forming additive. The film forming additive comprises vinyl sulfate and a phosphate ester compound having a structure of formula (I), optionally further comprising a conventional negative electrode film forming additive. The phosphate ester additive can form a protective film on the surface of the positive electrode material, thereby avoiding the generation of cracks in the NCM particles during the circulation process, reducingthe dissolution of transition metal elements at high temperature, and improving the normal temperature circulation performance, high temperature circulation performance and high temperature storage performance of the battery.

The invention relates to a two-stage series pressurization direct-driven centrifugal air compressor of a fuel cell engine. The two-stage series pressurization direct-driven centrifugal air compressor comprises end covers, a spindle, volutes, impellers, a rotor, a stator and a driver. The spindle is supported by a left-end radial supporting air foil bearing, a left-end radial supporting air foil bearing bush, an air foil axial thrust bearing and a right-end radial supporting air foil bearing, wherein the left-end radial supporting air foil bearing and the left-end radial supporting air foil bearing bush are arranged on the left side, and the air foil axial thrust bearing and the right-end radial supporting air foil bearing are arranged on the right side of the spindle. The left-end radial supporting air foil bearing bush is arranged on the outer side of the spindle in a surrounding manner. The left-end radial supporting air foil bearing is fixed to the outer side of the left-end radial supporting air foil bearing bush. The air foil axial thrust bearing is fixed to the outer side of the spindle in a bush form. The right-end radial supporting air foil bearing is fixed to the outer side of the air foil axial thrust bearing. Compared with the prior art, the two-stage series pressurization direct-driven centrifugal air compressor is more suitable for the air inlet pressurization scene of the fuel cell engine with the high oilless air inlet requirement, and the durability and reliability of the air compressor of the fuel cell engine can be improved.

The invention discloses a built-in suspended integrated type hub motor drive electric wheel. The built-in suspended integrated type hub motor drive electric wheel comprises a hub motor, a brake, a wheel, a vibration absorption mechanism and a speed reduction mechanism, the speed reduction mechanism comprises a sun wheel, a planetary wheel, a planetary rack and a tooth ring, and the vibration absorption mechanism comprises a first elastic element and a second elastic element; the hub motor is connected with a vehicle through the first elastic element and connected with a support axle of the wheel through the second elastic element; the speed reduction mechanism comprises the sun wheel, planetary wheel, planetary rack and tooth ring. Compared with the prior art, the built-in suspended integrated type hub motor drive electric wheel has advantages of compact structure, light weight, large power density and easiness in arrangement on the wheel, and moreover, the dynamic property and safety of the vehicle are obviously improved, the dynamic characteristic of an electric wheel drive system is effectively improved, and the grounding performance of the wheel and the service life of spare parts are improved.

The invention discloses a triangular connecting rod-toggle rod transmission mechanism with a large force magnification ratio for a servo press. The mechanism comprises a servo motor, an upper pin shaft, an upper toggle rod, a triangular connecting rod, a crank, a middle pin shaft, a lower toggle rod, an unloading oil cylinder and an ejecting oil cylinder, wherein the output shaft of the servo motor is connected with the crank through a transmission mechanism; the crank is connected with the connecting rod; the connecting rod is connected with the upper toggle rod and the lower toggle rod respectively; the upper toggle rod is hinged and fixed on the machine body; the lower toggle rod is connected with a slider capable of linearly reciprocating up and down along a guide rail of the machine body through a wedged overload protection block and the unloading oil cylinder; the upper toggle rod and the lower toggle rod have different lengths and are asymmetric; and the connecting rod is triangular. As symmetric toggle rods are changed into asymmetric toggle rods, and a linear connecting rod is changed into the triangular connecting rod, a relatively large force magnification ratio is obtained, the drive torque required by the crank is remarkably reduced, and the capacity and cost of the servo motor are reduced under the condition of guaranteeing compact structure of the machine body, enough stroke of the slider and monotonous descending of the slider.

The invention discloses a vehicle queue following stability control method considering communication topological time varying. The method herein comprises the steps of 1, establishing a vehicle queuefollowing mathematical model; 2, describing a node power unit as a node linear model; 3, establishing a high-dimensional closed-loop state equation of a vehicle queue following control system considering communication topological time varying; 4, according to the high-dimensional closed-loop state equation, giving a sufficient condition for the fact that a vehicle queue considering communication topological time varying has a stabilization controller, namely when average residence time is longer than a lower limit, the stabilization controller of the vehicle queue system has a feasible solution; 5, by using the sufficient condition for the fact that the vehicle queue has the stabilization controller, providing a low-dimensional Riccati inequation to obtain controller gain. The method herein ensures that the vehicle queue following system under communication topological time varying is stable and robust.

A composition of and method for forming activated carbon with magnetic properties for magnetic separation of the activated carbon from a liquid being treated is disclosed wherein a solution iron magnetic precursor is intimately mixed or absorbed into a porous carbon precursor or mixed with a solution or meltable carbon precursor to form an essentially homogeneous mixture or solution that when dried and pyrolized forms activated carbon particles with magnetic material evenly dispersed throughout the activated carbon material. The activated carbon particles may be of fine particle size, even powdered, and still retain magnetic properties sufficient for magnetic separation. In a particular aspect of the invention, a carbon precursor of soft wood is soaked in a solution of a ferric salt, dried, pyrolized and activated.

The invention discloses a hub electric driving system with a torsion vibration attenuation function. The hub electric driving system with the torsion vibration attenuation function comprises a hub motor, a torsion vibration attenuation device, a brake, a hub and the like. The torsion vibration attenuation device is composed of a rotor supporting frame, elastic elements, a driven disc, a driven disc hub and damping fins. The rotor supporting frame, the driven disc hub and the driven disc are each provided with peripherally distributed rectangular window holes with the elastic elements. The rotor supporting frame is connected with a hub motor rotor. The driven disc hub is provided with a notch corresponding to a rivet spacer bush and connected with the hub through bolts. The driven disc and the rotor supporting frame are riveted together through rivets and clamp the driven disc hub and the vibration attenuation damping fins on two sides. The brake is a disc brake. A brake disc is installed on the rotor supporting frame and rotates along with the rotor supporting frame. A brake caliper is installed on a suspension knuckle arm. Due to the arrangement of the torsion vibration attenuation device, the torque pulsation from the hub motor can be effectively attenuated, the inherent characteristics of the system can be adjusted, and the purpose of improving the dynamic characteristics of the hub electric driving system is realized.

The invention relates to a method for forming cutter machining tracks on an NURBS combined curved surface and belongs to the technical field of numerical control machining. According to the method, by splicing vector fields, the problem that the smooth and topologically controllable cutter machining tracks are formed on a C1 continuous NURBS combined curved surface is solved. The method comprises the following steps: carrying out sampling on each surface piece of the combined curved surface along the feeding direction, respectively, so as to obtain the feeding direction of each surface piece in a corresponding parameter domain; establishing a localized feeding vector field based on a stream function represented by a sample-B primary function polynomial on each surface piece parameter domain, and regulating the control parameters close to the borders of adjacent vector fields, so as to realize the G1 splicing of the vector fields; and selecting required series flow lines from the G1 continuous combined vector field according to the machining precision requirement, and mapping the series flow lines to the combined curved surface, so as to obtain the feeding tracks required by the machining. According to the method, the uniform expression meeting machining track line groups of the C1 continuous combined curved surface is achieved, and smooth and various-form machining tracks can be formed.

An outer race for a rocker bearing includes an internal sliding layer and an external support layer, wherein the sliding layer and the bearing layer are formed from a wound composite fiber material. The outer race is identified by exactly one parting line. A rocker bearing with such an outer race and a method for its production is also provided, in which a sliding layer and a support layer of synthetic resin impregnated fibers are wound in succession onto a winding mandrel, and outer races are formed after setting on the winding body thus produced. The sliding layer and the support layer are wound onto a cylindrical winding mandrel, and the outer race is provided with exactly one parting line opening it, and sliding layer material on its inside is removed to such an extent that a partially spherical contour is obtained for receiving a complementary inner race.

A three-freedom robot for the recovery training is composed of a rotation unit, a rotary table driven by said rotation unit, the vertical and horizontal movement mechanisms arranged on said rotary table, a parallelogram mechanism consisting of two long rods and two short rods, an extending rod connected between one long rod and the output of vertical movement mechanism, and a recovery training terminal connected to one short rod.

The invention discloses an active shock absorption and vibration isolation device. In the device, a speed signal of an object which is subjected to vibration isolation is converted into a ceiling damping force signal to act on the object which is subjected to the vibration isolation by the technology of non-linear fractional order ceiling damping control to achieve the vibration isolation effect of the low-vibration transmissibility and high attenuation ratio of the object which is subjected to the vibration isolation; and thus, the robustness of damping control can be improved, and the dynamic characteristic of shock absorption and vibration isolation device can be improved.

The invention provides a star sensor mounting structure for thermal deformation isolation and control. The star sensor mounting structure comprises a star sensor mounting cross beam assembly, connecting screw rod assemblies and connecting and separating assemblies. The two ends of the star sensor mounting cross beam assembly are connected with a star body framework through the connecting screw rod assemblies so as to release the freedom degree of rotating around the axes of screw rods at the connecting positions, by the adoption of the half-rigid connecting mode, when thermal deformation happens to the star body framework in a space extreme temperature environment, the shape of a star sensor mounting cross beam is kept unchanged, and thus it is guaranteed that the orientation of a star sensor mounted on the star sensor mounting cross beam cannot be changed. The connecting and separating assemblies play the effect of lowering the dynamic response of the star sensor under the mechanical environment excitation of a satellite launching section. After a satellite enters an orbit, added connecting points are released. The star sensor mounting structure can be used for mounting the star sensor which has a high requirement for on-orbit pointing accuracy and stability, the on-orbit thermal deformation of the star sensor mounting cross beam is isolated and controlled, and the request for utilization can be guaranteed.

The invention discloses an integrated contra-rotating double-rotor electric wheel integrated structure. The integrated contra-rotating double-rotor electric wheel integrated structure comprises a contra-rotating double-rotor motor, a planetary reduction mechanism, a disc brake, a shock absorbing mechanism, a cooling mechanism, a rim, a tire and the like. By sufficiently utilizing a characteristicthat internal and external rotors of contra-rotating double rotors both have rotation speed and torque outputs, the contra-rotating double-rotor motor is used as a hub driving system power source to design an electric wheel integrated structure; and the integrated structure simultaneously considers vibration absorbing, cooling, sealing and braking design of the system so that a hub driving systemcan more stably work. According to the integrated contra-rotating double-rotor electric wheel integrated structure, the structural scheme can realize three driving modes so that the rotation speed andtorque ranges of the hub driving system in operation are enlarged, and the hub driving system can realize multi-condition output; and meanwhile, through adoption of the integrated structural design,the utilization rate of the interior space in the wheel is increased to enable the wheel to be conveniently used in a matched manner; and the integrated contra-rotating double-rotor electric wheel integrated structure can be widely applied to multiple pure electric vehicle models and can also be used for hybrid vehicles with these models.

The invention relates to a preparation method of a Nisin modified magnetic nano particle and provides the preparation of a Fe3O4 magnetic nano particle and a functionalization condition of sol-gel. The method comprises the following steps of: preparing a superparamagnetism Fe3O4 magnetic nano particle; carrying out silane functionalization on the Fe3O4 magnetic nano particle; and preparing a Nisin functionalization magnetic nano particle. The invention has the advantages that when the Nisin functionalization magnetic nano particle is applied to microbioassay, the Nisin functionalization magnetic nano particle has high chemical stability, good biocompatibility, and the grain diameter of the Nisin functionalization magnetic nano particle can ensure that the surface accommodates a plurality of ligands so as to conduct a multivalent action with bacteria, thus the biological nano particle has good dynamics; and particularly, both the specific action and the electrostatic adsorption of Nisin and the bacteria can promote the catch to the bacteria. The method has reasonable process and easy application, can quickly and sensitively detect pathogenic bacteria and has important meanings in the aspects of food security, clinical diagnosis, treatment, biological terrors, and the like.

The invention provides an on-orbit inflatable inflatable satellite that can be inflated and expanded, comprising: a satellite core, a support body and a satellite shell, the satellite core is arranged at the center of the satellite shell, and the satellite core and the satellite shell are connected with support body. The satellite core contains the electronic components of the satellite, and the support body is composed of an inflatable expanded support tube. The upper surface outside the satellite shell is used to paste flexible solar cells to form a body-mounted solar cell array, and the lower surface outside the satellite shell uses shaping technology to form the shape of the antenna, and install antenna component modules to form a body-mounted antenna . The present invention adopts a substantially spherical inflatable unfolding structure, and there are no flexible structures such as large-scale long-arm solar panels and space-borne antennas after forming, thus greatly improving the overall structural rigidity of the satellite and improving the overall vibration fundamental frequency of the satellite. Compared with existing satellites, the fundamental frequency of vibration is increased by 5 to 10 times. The overall dynamic characteristics of the satellite have been improved, and the overall stability of the satellite has been improved.

The invention discloses an engine with adjustable compression ratio, comprising a cylinder, a piston arranged in the cylinder and an upper connecting rod of which the upper end socket is articulated with the piston pin and the lower end socket is articulated with the eccentric pin; the eccentric pin is integrally formed with a first pin which is fixedly connected with one or two auxiliary driving wheels; the auxiliary driving wheels are coaxial with the first pin and are provided with an oscillating bar; one end of the oscillating bar is articulated on the first pin, and the other end is supported on a second pin on the engine cylinder and is coaxially connected with one or two active driving wheels which are parallel to the auxiliary driving wheels and rotate under control; the active driving wheels drive the auxiliary driving wheels to rotate; the middle part of the oscillating bar is provided with articulating points and is articulated with a lower connecting rod which is connected with a crank. The engine has low height of the complete machine of the engine, good rigidity of the crankshaft, long service life, low cost, good dynamic property, simple and convenient adjustment of compression ratio, great output low speed torque, high power, little fuel consumption and low discharge pollution.

The invention discloses a kernel rotor device of an exhaust-gas turbocharger, comprising a middle casing, a thrust sleeve, a thrust bearing, an oil baffle, and a shaft gland, wherein a blade wheel is arranged on a turbine shaft on one end of the shaft gland, the middle casing on the one end of the blade wheel is provided with a chamber, a sealing ring sleeve base is arranged in the chamber, and the sealing ring sleeve base comprises a ring-shaped component which is sealed with the inner walls of the chamber and a lantern ring which is dynamically sealed by the shaft gland and is arranged on the turbine shaft. A ring-shaped connecting member is fixedly connected between the ring-shaped component and the lantern ring, one lateral side of the ring-shaped connecting member which faces the blade wheel is provided with an arc-shaped end face which is relative to the shape of the blade wheel. The original connection between a linking disk and the middle casing is changed into the connection of the middle casing and the sealing ring sleeve to remove the linking disk with large size, thereby avoiding deformation of the product. The original projection sealing is changed into notch sealing to enlarge the oil return space of the product, and the original screw pressing is changed into a circlip pressing, thereby providing conveniences for assembly, easily adopting an automatic assembly line, and reducing the cost of the product.

The invention discloses a tumor-targeting GRP analogue and application thereof. The GRP analogue is selected from any of linear polypeptide Gln-5-Htp-beta-Ala-Nva-Gly-His-NH2, annular polypeptide Lys-Cys-Gln-5-Htp-beta-Ala-Nva-Gly-His-CysHis-Gly-Nva-beta-Ala-5-Htp-Gln-NH2 and the like. High-affinity polypeptides can be specifically combined with various tumor cells, and this high-affinity characteristic can be used for optical imaging and nuclear medicine imaging of malignant tumor. The high-affinity polypeptides when being coupled with fluorescent dye can serve as a tumor specific-targeting molecular probe, the tumor-targeting GRP analogue is expected to realize effect of accurately positioning tumor boundary, can bring about instantaneity for preoperative and intraoperative image navigation and has the advantage of improving operative accuracy.

The invention provides a composite catalyst for catalytic modification of methanol gasoline. Oxides, and / or phosphides, and / or silicides, and / or borides of one or more of Cr, W, Mo, Co, Ni, Zn, Cd, Cu, Pt, Sn, Sb, Zr and Sr elements are taken as active components to be loaded on a porous carrier to prepare the catalyst. According to elements, the active components account for 0.5 to 3 percent of the weight of the catalyst carrier. The catalyst can also load an auxiliary catalyst which is oxides of one or more of K, Mg and Mn, and according to elements, the auxiliary catalyst accounts for 0.2 to 1.5 percent of the weight of the catalyst carrier. The catalyst is prepared by the isometric immersion method, and mainly applied to low-proportion methanol gasoline, optimally the catalytic modification of two types of methanol gasoline of M15 and M30.

The invention discloses a closed high-altitude cable rope climbing robot which comprises three idler wheel sets, side supports, a descent speed limiting device and obstacle induction devices. The side supports are symmetrically arranged on the two sides of the three idler wheel sets and a closed structure is formed by the three idler wheel sets through the side supports. Each idler wheel set comprises at least one idler wheel and can serve as a drive wheel set. By the adoption of the structure, the whole robot is an elastic mechanism, the situation that each wheel is independently and elastically suspended is avoided, and therefore the robot obstacle crossing function is facilitated greatly. The descending speed can be adjusted through the descent speed limiting device, and when the robot climbs cable ropes at different inclination angles, the actual significance is higher. The fluid damping function is achieved, and compared with mechanical friction braking, thermal stability is good, the robot is suitable for being braked for a long time at a long distance, and braking force cannot be attenuated. Meanwhile, the braking force is increased along with the increase of the descending speed, the descending speed and the braking force are in a dynamic balanced process, and the robot can descend at a constant speed or nearly a constant speed.

The invention discloses an eosin liposome and making method, which comprises the following parts: 18-22mg eosin, 505-509mg lecithin, 90-95mg cholesterol, 73-77mg sodium deoxycholate, 505-509mg mannitol, 505-509mg lactose and 18-22mL phosphate buffer with pH value at 5.5-6.5. the making method comprises the following steps: (1) adding eosin, sodium deoxycholate, lecithin and cholesterol into chloroform; (2) decompressing; evaporating chloroform; (3) adding lactose and mannitol into phosphate buffer; (4) emulsifying phosphate buffer without fat film; (5) freezing; drying to obtain the product.

The invention discloses a small molecular organic compound with a specific targeting TSPO (Transfer Protein). The structure of the small molecular organic compound comprises a benzene ring, pyrazolo imidazole and a diethyl acetamide structure. The P-toluenesulfonyl on a side chain of a benzene ring is used as a marker site; carrier-free radioactive fluorine-18 is used as a radioactive source; andmild alkaline reaction conditions are designed and utilized. By using a functional GE TRACERlab FX2N synthesizer, a target compound [18F] DPA714 is obtained through a one-step reaction. The method hasthe advantages of mild reaction conditions, simple steps, and automatic labeling; the non-attenuation correction yield reaches 40% or above; the radiochemical purity of the product is higher than 99%, the specific activity is higher than 148GBq / [mu] mol (4Ci / [mu] mol). The invention solves the technical problems of low labeling yield, low specific activity, complex operation and the like in the prior art. A radioactivity molecular probe prepared from the small molecular compound is shown as an imaging evaluation result of a positron emission tomography (PET) in patients (including Alzheimer'sdisease and cerebral apoplexy) with neuroinflammation related diseases, and the radioactivity molecular probe has the characteristics of high sensitivity, high sensitivity, high sensitivity, high sensitivity, high sensitivity, high sensitivity and the like. It is proved that the molecular probe has good specificity, targeting, stability and non-target tissue clearance rate.

The invention relates to a calcium vanadate mesoporous nanowire material and a preparation method thereof. The material can be used as a sodium-ion battery anode active material. The calcium vanadate mesoporous nanowire is obtained in combination with post heat treatment by using a hydrothermal process, the molecular formula of calcium vanadate is CaV4O9, the diameter of the nanowire is 100-200 nm, the length of the nanowire is 5-10 microns, a large number of mesopores are uniformly formed in the surface of the nanowire, and the pore diameters of the mesopores are 20-50 nm. The calcium vanadate mesoporous nanowire material has the beneficial effects that the calcium vanadate mesoporous nanowire material has relatively high specific capacity, good cycling stability and extremely excellent rate capacity when being used as the sodium-ion battery anode active material, and is a potential high-performance sodium-ion battery anode material; and moreover, the preparation method is simple in technology, and the calcium vanadate mesoporous nanowire can be obtained through the simple hydrothermal process and subsequent heat treatment, so that the method is green and environmentally-friendly and relatively low in energy consumption.

Sensor for use in highly sensitive analytical devices for qualitative and quantitative analysis of natural waters and technology-related solutions, containing low concentrations of components determined. Design of a sensor provides for simplification and costs reduction of its manufacture, widening range of solutions analyzed, improvement of their kinetic characteristics and increase in analysis sensitivity. Sensor has multichannel structure in a form of a piece 1 of a polycapillary tube with through capillaries forming microchannels filled up with two layers of immiscible substances. One layer (4) is formed of water or aqueous solution, and another layer (3) is formed of organic substance. The first of the layers in microchannels contains sorbent microgranules 5.

The invention relates to a variable-area rotatable bionic winglet, and belongs to the technical field of aircrafts. The variable-area rotatable bionic winglet includes a transmission mechanism, a deformation mechanism and a rectifying leading edge; a motor of the transmission mechanism is fixed to a wing tip of a wing through a fixing seat, and a rotor is connected with the deformation mechanism through a rotating shaft so that the rotation angle of the winglet relative to the wing can be adjusted; the deformation mechanism is characterized in that a short rod on a feather, a first long rod, asecond long rod and a connecting line of hinge holes in the fixing plate form a parallelogram structure; a steering gear drives a connecting rod to control the rotation angle of the parallelogram structure, and the area change of a variable mechanism is further realized; and the variable-area manner of a parallelogram is adopted, simpleness and reliability are achieved, and a large area change range is achieved. In the design, the maximum area is at least twice the minimum area. The larger range means a rudder effect change range with the better effect, so that better adaptation to differentkinds of rolling control is achieved.

The invention relates to a three-degree-of-freedom precision-positioning workbench, comprising the workbench and an enlarged base, wherein, the workbench and the enlarged base are positioned through three cylindrical rods; and three groups of two-stage enlarging mechanisms are vertically intersected to form the enlarged base. The precision-positioning workbench can reach nanoscale positioning precision, has good operability, effectively overcomes the problem of input and output coupling among the three groups of micrometric displacement enlarging mechanisms, and increases the operating flexibility.

The invention relates to a pre-lithiatedanode material with the high reversible capacity and a preparation method of the pre-lithiatedanode material. The pre-lithiatedanode material comprises a graphite-like carbon material, metallic oxide or silicon uniformly distributed on the pre-lithiatedanode material, and lithium carbonate; the first coulomb efficiency of the anode material is 5%-10% higherthan that of the corresponding pure metallic oxide or silicon anode material, and the capacity retention rate of the anode material is no less than 85% after cycling for 100-350 times. The preparationmethod includes the steps that the metallic oxide or silicon powder, lithium carbonate powder, the graphite-like carbon material and a grinding agent are stirred,mixed and subjected to ball-milling.According to the pre-lithiatedanode material with the high reversible capacity and the preparation method of the pre-lithiatedanode material, by adding the lithium carbonate, the irreversible capacityof the anode material in the initial charging and discharging process is lowered, and thus the first coulomb efficiency is improved; by adding the graphite-like carbon material, structural stabilityof the material in the reaction process and conductivity of an electrode material are improved; and according to the ball-milling method, the size of the anode material particlescan be refined in a short time, and the volume change of the anode material is buffered.