1558results about How to "Guaranteed contact" patented technology

The invention provides an annular thin-wall article clamping device and a using method of the device. The clamping device comprises an annular chassis; the chassis is provided with a radial regulation mechanism of a locating workpiece; the radial regulation mechanism is divided into an inner radial regulation mechanism and an outer radial mechanism; two radial regulation mechanisms position workpiece respectively from the inner side or the outer side of the workpiece; the chassis is respectively provided with track-directed sliding grooves for the two radial adjustment mechanisms; the inner end of the sliding groove of the inner radial regulation mechanism is provided with a stopping block; the outer end of the sliding groove of the outer radial regulation mechanism is provided with the stopping block; the sliding grooves of the two groups of radial regulation mechanisms are disposed at intervals; one of the two groups of radial regulation mechanisms is provided with an axial compacting mechanism for fixing the workpiece; and the axial compacting mechanism is displaced alternatively between the two groups of radial regulation mechanisms when turning the workpiece. The clamping device can realize the processing of two side walls of the workpiece by clamping the workpiece once, and is fit for the clamping of the workpieces with different specifications. The device has the characteristics of high use rate, strong practical applicability, good generality, time saving and labor saving, light labor intensity, high production efficiency and the like.

The present invention discloses an inorganic-organic nano composite solid electrolyte membrane and a preparation method and application thereof. The composite solid electrolyte is a novel inorganic-organic nanocomposite combining the respective advantages of inorganic ceramic solid electrolyte and organic polymer electrolyte and is composed of a negative electrode protective layer, a support layerand a positive electrode interface layer. The support layer plays a supporting role, and the main component of the negative electrode protective layer is the inorganic solid electrolyte with good mechanical properties, which can effectively inhibit the growth of lithium dendrite; and the positive electrode interface layer is mainly composed of organic polymer electrolyte with good flexibility, ensures good contact with active materials and provides a continuous ion transport channel. In the present invention, the composite solid electrolyte with good interface compatibility is prepared by coating on both sides of the support layer, and the process is simple and efficient. The composite solid electrolyte can effectively inhibit dendritic crystal and reduces interface resistance so that a solid lithium metal battery has higher energy density and longer cycle life.

The invention discloses a manufacturing method of a lamp-cover-supporting LED tubular lamp with a self-clamping heat transmission substrate, and belongs to the technical field of supporting or hanging or connecting of lighting devices. The manufacturing method of the LED tubular lamp includes the steps that S1, the heat transmission substrate is inserted into strip-shaped clamping grooves from side ports of the strip-shaped clamping grooves; S2, after the heat transmission substrate is installed in the strip-shaped clamping grooves, a lamp cover covers a radiator; S3, the lamp cover exerts two acting forces on two T-shaped hooks, and the heat transmission substrate is installed in the strip-shaped clamping grooves in a clamped mode; S4, the radiator, the heat transmission substrate and the lamp cover form a lamp tube of the LED tubular lamp, and two end covers are installed at the two ends of the lamp tube of the LED tubular lamp. According to the lamp-cover-supporting LED tubular lamp with the self-clamping heat transmission substrate, the heat transmission substrate can be arranged in the strip-shaped clamping grooves in the clamped mode because the strip-shaped clamping grooves are formed in an installing part of the heat transmission substrate, heat dissipation efficiency can be improved, and the heat transmission substrate is prevented from thermal deformation.

The invention provides a wiping washing machine. The machine comprises a moving platform, a glass element to be wiped, and an operation panel; a dustproof cloth transmission mechanism and at least two wiping mechanisms are arranged at one side of the operation panel; a liquid injection mechanism is correspondingly arranged in the front of each wiping mechanism; the dustproof cloth conveying device comprises discharging mechanisms, receiving mechanism the dustproof cloth belts, wherein the discharging mechanisms and are receiving mechanism which are respectively arranged at two sides of the two wiping mechanisms; the dustproof clothes are conveyed from the discharging mechanisms and sequentially pass through one of the sides of each liquid injection mechanism and the corresponding wiping mechanism, opposite to the operation panel; each liquid injection mechanism comprises an injection head for injecting a cleaning solution to each dustproof cloth belt. With the adoption of the machine, the glass element positioned on the moving platform can be fully washed and wiped at a plurality of times under single return stroke of circular wiping of the dustproof cloth belts, so that the wiping and cleaning effects are good.

Provided is a flexible super capacitor. Two current collectors are covered on the upper and lower surfaces of a composite hydrogel film; and packaging layers wraps the current collectors and the composite hydrogel film. The composite hydrogel film is integrated by two electrodes and middle electrolyte; and the upper and lower surfaces of the composite hydrogel film are conductive polymer layers serving as the electrodes respectively, and the middle layer thereof is a hydrogel layer serving as the electrolyte. The two current collector layers are covered on the two sides of the electrode-electrolyte composite film respectively, and the formed whole body is packaged in the packaging layers. The preparation method of the flexible super capacitor is characterized by, to begin with, preparing the polyvinyl alcohol hydrogel film; then, preparing the conductive polymer-polyvinyl alcohol composite hydrogel film having a sandwich structure; preparing the current collectors on the upper and lower surfaces of the conductive polymer-polyvinyl alcohol composite hydrogel film; and finally, carrying out packaging.

The invention relates to a short-circuit electric connector which is an electric connector which carries out short-circuit or open-circuit switching among contact components and is provided with a preservation mechanism and a short-circuit module. The short-circuit electric connector comprises a plug, a switchover base combination component, a maintenance mechanism, a short-circuit module and a socket, wherein the plug comprises a guide pin, a casing, an insulation base, a jack contact component, an installation plate, a sealing ring and a locking screw. The switchover base combination component comprises a leading wire, a needle base, an insertion needle contact component and a screw sleeve, and the maintenance mechanism comprises a supporting spring and a cover casing. The short-circuitmodule comprises a hole upper base, a short-circuit jack contact component, a hole lower base, a retainer ring, a riveting pipe, a spring washer, a pull rod, a screw cap and a short-circuit wire. Thesocket comprises a casing, an insertion needle, a separation spring, a baffle plate, an upper insulation base, a push rod, a supporting spring of the push rod, a lower insulation base, a floating riveting pipe, and an installation screw. By the insertion and combination of the plug and the socket and the insertion and pull of the short-circuit module, a short-circuit and open-circuit switching function between lines is realized.

The invention provides a positive pole piece which is characterized by comprising a positive pole current collector, a network conductive layer and a positive pole active layer in a sequential stacking mode. The network active layer comprises linear conductive material, polyvinylpyrrolidone (PVP) and polyvinylidene fluoride (PVDF). The linear conductive material is selected from one or more of carbon nano-tubes, carbon fibers, steel fibers, silver wires, platinum wires and conductive polymeric material. Meanwhile, the invention further discloses a preparation method of the positive pole piece and an alloy positive pole battery adopting the positive pole piece. In the using process of the disclosed positive pole piece, cracks caused by expansion of the alloy positive pole are obviously reduced, and the cycle performance and the rate discharge performance of the battery after the cracks appear are improved.

A threaded joint comprises a coupling, a first pin, and a second pin, wherein the thread of the first pin has a pitch different from the pitch of the thread of the second pin. The extremities of the pins have slanted contact surfaces of complementary shape that make mutual contact after make-up of the joint. The slanted common plane of contact of both pins has an angle to the plane perpendicular to the longitudinal axis of the joint which is greater than 0°. In an alternative embodiment the contact surfaces of the pins are split into two staggered planes and comprise a seal in-between.

The invention discloses a method for preparing a polyaniline / manganese dioxide composite material for a super capacitor, which adopts permanganate as an oxidizer to oxidize aniline to directly obtain the polyaniline / manganese dioxide composite material. The method can ensure the contact of manganese dioxide and polyaniline at molecular level by oxidizing the aniline by the permanganate, has no an impurity phase after a reaction at the same time, and simplifies subsequent treatment work. The method for preparing the polyaniline / manganese dioxide composite material for the super capacitor has the advantages of simple process, convenient operation and convenient control, ensures that the electric conductivity of the prepared polyaniline / manganese dioxide composite material is effectively improved, and is suitable for mass industrial production.

The invention relates to a method for preparing silica modified by a silane coupling agent. The method comprises the following steps: preparing a kind of coupling agent sol solution by mixing the solvent, water, catalyst and coupling agent; uniformly dispersing silica into the sol solution by means of ultrasonic dispersion or shear dispersion to achieve a turbid solution with uniform dispersion and ideal particle size; and then stirring the turbid solution at a constant speed to make the coupling agent sol reacting with silica to prepare highly hydrophobic silica modified by the coupling agent through controlling the temperature and reaction time. The coupling agent sol solution is obtained by a sol-gel process and silica is uniformly dispersed in the coupling agent sol solution through combined action of various dynamic means to ensure the sufficient reaction between silica and coupling agent, thus to obtain silica modified by the coupling agent.

The invention relates to a fast recovery diode FRD chip and a production process for the same. The process comprises the following steps of: diffusion pre-treatment, boron source pre-deposition, boron source main diffusion, diffusion after-treatment, single-surface back grinding thinning, oxidation pre-treatment, oxidation, photoetching, single-surface oxide layer removal, phosphorus source pre-deposition, phosphorus diffusion, sand blasting, platinum diffusion, N + surface mesa etching, electrophoresis, sintering, oxide layer removal, nickel plating, gold plating and chip cutting, wherein the structure of the obtained chip is P+-N-N+ type. According to the process, the uniformity of the reverse recovery time of the fast recovery diode is improved and controllability is improved, meanwhile, voltage drop is reduced, leakage current is reduced, and voltage-proof stability is improved; the contradiction of mutual condition among the reverse voltage, the positive voltage, the reverse recovery time and the leakage current of the fast recovery diode is solved to enable the various parameters to achieve the optimal matching, thus improving the reliability and switching characteristic of the diode, and reducing power consumption. The fast recovery diode disclosed by the invention breaks through the technical bottleneck of the traditional fast recovery diodes.

The method relates to a floor panel (100), more particularly a laminate floor, with resin-impregnated, more particularly paper layers (10, 11, 13), which are pressed together with a carrier board (12). In order to design a floor (100) in such a way that a conductive and transparent layer can be positioned at any point in the sequences of layers of the floor panel (100) in order to achieve an antistatic effect the invention proposes providing at least one layer (10, 11, 13) is provided with conductive and transparent pigments (16).

The invention discloses a steel plate polishing device for processing a metal product, and relates to the technical field of metal product processing machinery. The steel plate polishing device includes a supporting frame, a bearing frame is arranged in the supporting frame, a supporting plate is mounted on the bearing frame, and a sliding plate is arranged on the supporting frame in a horizontalsliding and penetrating mode; and a first incomplete gear and a second incomplete gear are fixed on a first transmission gear and a second transmission gear coaxially, and a limiting rack meshed and connected with a second cylindrical straight gear is fixedly mounted in the supporting frame. According to the steel plate polishing device, a steel plate placed on a supporting plate can be ground andpolished through the left and right reciprocating motion and rotation of a polishing disc, meanwhile, the supporting plate can reciprocate back and forth, the range of grinding and polishing of the steel plate is greatly increased, the polishing efficiency is greatly improved, the lifting operation of the supporting plate is simple and fast, the fact that the steel plate on the supporting plate keeps contact with the polishing disc is ensured, meanwhile, through the limit spring elastic action, the sufficient pressure of the polishing disc on the steel plate is achieved, and the polishing effect of the steel plate is ensured.

A protection device (20) for protecting a fuselage (2) of a rotorcraft (1) against a pyramid-shaped structure (10) for carrying a load, which structure has a frame having a quadrilateral shape together with a first pair of two arms (12) and a second pair of two arms (14), each arm extending in elevation from the frame up towards an apex (16). The protection device includes a protective plate (21), a blade (30) secured to said protective plate (21) for exerting a force on said two arms of the first pair, and a chevron (40) provided with two branches connected to said protective plate (21) in order to tend to move the arms of said second pair transversely apart from each other.

The invention discloses a comprehensive cleaning device for sports ball equipment of different sizes, and relates to the field of sports equipment. The comprehensive cleaning device comprises a bearing table, a supporting frame, a bearing support arranged at the upper portion of the supporting frame, and annular clamping plates symmetrically arranged in the middle of the bearing table. A balancing plate is arranged at the lower end of the bearing support and fixed to the top wall of the bearing support through a plurality of supporting connecting rods. Clamping groove sliding openings are symmetrically formed in the surface of the balancing plate in the direction of the transverse axis. Two connecting rods are symmetrically arranged in the clamping groove sliding openings. The bottom ends of the two connecting rods are connected with two first electric push rods. The ends of the two first electric push rods are connected with the annular clamping plates respectively. The lower ends of the two first electric push rods are provided with two second electric push rods respectively. The ends of the two second electric push rods are each connected with an annular cleaning brush plate. The comprehensive cleaning device is simple in structure, meets the requirement of cleaning balls with different diameters, more comprehensively cleans the surfaces of the ball equipment, is better in cleaning effect and reduces the environment pollution.

The invention relates to a full-automatic stone-like brick making machine and a brick making method. The stone-like brick making machine comprises a center seat and a rotary disc, a plurality of moldpositions are uniformly distributed on the rotary disc in the circumferential direction, a vibration box body is fixedly mounted at each mold position through a rubber cushion block, a vibration motoris mounted on the bottom of each vibration box body and is hidden in the vibration box body, lifting oil cylinders are respectively mounted on two symmetrical sides of each vibration box body, and apiston rod of each lifting oil cylinder is connected with a connecting block; and a fabric distributing machine, a vibrating press, a prepressing machine, a main press unit and a demolding and brick discharging unit are sequentially arranged at each mold position correspondingly in the rotating direction of the rotary disc, and 0-2 transition positions are reserved between the vibrating press andthe prepressing machine. According to the invention, brick making processes are innovatively separated and arranged into an annular layout, the occupied area is small, the various processes can act simultaneously, the production period is shortened, the surface of a surface layer is compact, the requirement on raw materials is reduced, produced bricks can be maintained in a maintenance kiln or ina manner of standing and drying in the shade, the production period can be greatly shortened, and the energy consumption is reduced.

A device is provided that is suitable for percutaneous insertion into a hollow vessel, such as a blood vessel, within the body of a patient for purpose of causing endoluminal closure of the vessel at a specified therapeutic site in the body of a patient. The device suitably is in the form of a catheter that is slidably mounted on a guidewire. The catheter may comprise one or more heating modules, as well as one or more extendable structures located on the device and optionally on the associated guidewire, that lead thermal ablation of the vessel walls and subsequent collapse of the vessel. The catheter can function alone or in cooperation with an associated guidewire to induce sealing of the vessel. Methods of using the catheter to treat lesions such as tumours or haemorrhages are also described.

The invention provides an intelligent remote control self-adaption pipe robot. The intelligent remote control self-adaption pipe robot comprises a control guide module, an universal transmission module and six self-adaption adjusting bracket modules; the control guide module includes a traction pin shaft, a traction shell, a battery box, a battery set, a conical adaptershell, a circuit board, a speed reducing motor, a speed reducing motor mounting shell, a transmission step shaft, a rolling bearing, a bearing retainer ring and a nylon stopper; the universal transmission module includes a damping spring, an universal joint, a spring pretightening hand wheel, a hand wheel sleeve, a plane thrust bearing, a transmission shaft, a hexahedron sleeve and a conical flange; and each self-adaption adjusting bracket module includes a polyurethane wheel, a deep groove ball bearing, a polyurethane wheel rotating shaft, a double-lug bracket, a double-lug fixed base, two connecting rods, two spring dowel pins, two springs, a positioning pin shaft and a mounting base. The intelligent remote control self-adaption pipe robot can climb in pipes with different diameters, and is simple in structure, excellent in flexibility and high in stability.

The invention provides a ring spinning frame employing a single-spindle atomization wetting device to reduce hair. The ring spinning frame comprises a front roller, a front top roller corresponding to the front roller, and a yarn guide hook which moves vertically up and down in a spinning process. A front jaw is formed between the front roller and the front top roller. The ring spinning frame is characterized in that a wetting device is arranged in a yarn guide section between the front jaw and the yarn guide hook and comprises a friction ring made of wear-resistant material with a low friction coefficient; the friction ring comes into contact with yarn from under; the whole wetting device only comes into contact with yarn via the friction ring. The ring spinning frame with the wetting device has the advantages that the amount of harmful hair of spun yarn can be greatly reduced, fiber utilization rate is increased and yarn properties are improved as a whole. The friction ring is used for guiding yarn, so that it is guaranteed that the included angle of yarn from a twisting triangular space does not change, the length of a surrounding arc formed on the surface of the front roller by yarn is reduced and the quality of yarn is further improved.

The invention discloses a marking device and a marking method of a traffic marking line of a municipal road. The upper side of a vehicle frame is provided with two sets of power devices symmetricallyarranged. A driving device is arranged on one side of a driving wheel, and the follower of the driving device is an intermittent moving mechanism. Two to three sets of marking devices are evenly disposed at the lower part of the drive unit. The upper side of the power devices is provided with a material storage barrel, and the lower part of the material storage barrel is fixedly installed on the power device through a plurality of support columns. A material inlet is arranged on that top plate of the material storage barrel. The lower part of a cone barrel of the storage barrel is provided with a material outlet pipe, the material outlet pipe is provided with a valve, the lower part of the material outlet pipe is provided with a material distribution pipe, and one side of the material distribution pipe is provided with a plurality of material inlet branch pipes. One end of the material inlet branch pipe is connected with the material distribution pipe, and the other end of the materialoutlet pipe is connected with the movable shaft of the hollow structure. A marking brush directly brushes that pavement, and a plurality of group of marking brushes are arranged to mark the pavementmany times, not only improve the efficiency of dotted line marking, but also enhances the effect of dotted line marking.

The invention discloses a tube type PERC single-sided solar cell, which comprises a main silver back gate, an all-aluminum back electric field, a back-side composite film, a P-type silicon, an N-type emitting electrode, a front-side passivation film and a positive silver electrode. The back-side composite film is composed of one or more selected from an aluminum oxide film, a silicon dioxide film, a silicon oxynitride film and a silicon nitride film and is deposited at the back of a silicon chip by adopting tube type PECVD equipment. The tube type PECVD equipment comprises four gas pipelines of silane, ammonia, trimethyl aluminum and laughing gas. The appliance of the tube type PECVD equipment, used for loading and unloading silicon chips, is a graphite boat. The depth of a sticking point groove of the graphite boat is 0. 5-1 mm. The invention also discloses a preparation method and special equipment of the tube type PERC single-sided solar cell. According to the invention, the photoelectric conversion efficiency is high. Meanwhile, the appearance yield and the EL yield are high. The problems of scratching, winding and plating can be solved.

The invention discloses a preparation method of a C / C-SiC composite material, and belongs to the technical field of preparation of C / C composite materials. The method comprises the following steps: putting a carbon felt of which the density is 0.4-0.55g / cm<3> into an impregnant to steep under a protective atmosphere; carrying out curing treatment and carbonization treatment; repeating vacuum impregnation, pressure impregnation, curing treatment and carbonization treatment and putting the obtained preform into a polyaniline methyl silane solution to steep after a C / C porous preform of which the density is 1.2-1.3g / cm<3> is obtained; carrying out curing treatment; repeating the steeping and curing technologies for 2-3 times, and then cracking under the protective atmosphere; and repeating the steeping, curing and cracking technologies until the C / C-SiC composite material of which the density is 1.9-2.1g / cm<3> is obtained according to the system of cracking once after steeping and curing for 2-3 times. The preparation method is short in preparation cycle, and low in cost, and the obtained C / C-SiC composite material is excellent in performance, and convenient to achieve industrial production.

The invention discloses a stirring device for agent preparation. The stirring device comprises a still body. A cover body is arranged at the upper end of the still body in a matched mode. A drive motor is arranged above the cover body. The lower end of the drive motor is connected with a speed reduction mechanism. An output shaft of the speed reduction mechanism is connected with a rotating shaft in the still body. The lower section, in the still body, of the rotating shaft is vertically provided with a supporting rod. The two ends of the supporting rod are connected with scraper blades through elastic connecting pieces. A spiral blade is axially wound around the lower end of the rotating shaft. An upper flange is arranged on the cover body. A lower flange is arranged on the still body. The upper flange and the lower flange are connected through a clamping mechanism. A sealing gasket is arranged between the cover body and the still body. The clamping mechanism comprises a first clamping piece, a second clamping piece, a screw, a gasket and a nut. The supporting rod is arranged at the bottom of the still body. A bottom plate is fixedly connected with the bottom of the supporting rod, and wheels and lifting devices are arranged at the bottom of the bottom plate. Materials can be effectively prevented from being attached to a still wall, and stirring efficiency is improved; the sealing performance of the still body and the cover body is improved, and detachment and movement are convenient.

The invention relates to the technical field of transmission in mechanical engineering, in particular to an air gap-adjustable magnetic gear with a side positive rotating magnetic adjusting device. The air gap-adjustable magnetic gear comprises a low-speed rotor assembly, a high-speed rotor assembly and a mobile magnetic adjusting assembly. The air gap-adjustable magnetic gear is characterized in that a servo motor is connected with a support frame through a lead screw, and the servo motor moves to drive the lead screw to move to achieve axial movement of the support frame; an outer rotor permanent magnet and an inner rotor permanent magnet are both obliquely arranged, and the magnetic adjusting device is formed by stacking side positive rotating type magnetic adjusting pole pieces and arranged in a clamp groove formed in the support frame in a clamped mode; and the magnetic adjusting device is driven by axial movement of the support frame to move axially to achieve the purpose of changing the size of an inner air gap and an outer air gap, and the upper surface and the lower surface of the magnetic adjusting device are parallel to the surface of the outer rotor permanent magnet and the surface of the inner rotor permanent magnet respectively, so that the inner air gap and the outer air gap change uniformly. According to the air gap-adjustable magnetic gear, by changing the size of the inner gap and the outer gap, the purposes of improving the transmission efficiency and increasing the torque density are achieved.

The invention provides an ecological and environment-friendly new method for preparing magnetic nano Fe3O4 particles by biological catalysis, and application of the particles to treatment of uranium-containing wastewater. The method comprises the following concrete steps: (1) culturing and domesticating thiobacillus ferrooxidans; (2) preparing bio-polymeric ferric sulfate; (3) synthesizing the magnetic nano Fe3O4 particles; (4) performing a test of adsorbing uranium in the uranium-containing wastewater by the magnetic nano Fe3O4 particles. The obtained magnetic nano Fe3O4 particles are simple in preparation synthesis route, mild in reaction condition and easy to operate; a biological catalysis oxidant is used for replacing a conventional chemical oxidant (nitrite), so that cancerogenic substances are prevented from being discharged to the environment and the environment-friendly effect is really achieved. Meanwhile, the obtained magnetic nano Fe3O4 particles can reduce the content of uranium in the low-concentration uranium-containing wastewater with the concentration of 0.45-0.50mg / L by more than 90% and have very important practical meaning in aspects of uranium-containing wastewater treatment, uranium recovery and the like in uranium mining and metallurgy.

The invention relates to a tank-shaped container, comprising a tank body, a reinforcing ring arranged on the outer side of the tank body and a bottom discharging valve arranged below one end of the tank body. A manhole, a safety valve, an air-phase valve, a top discharging hole and an overflowing box are arranged on the top of the tank body. An overflowing tube used for guiding liquid in the overflowing box to the outside of the tank-shaped container is arranged at the bottom of the overflowing box. The two ends of the tank body are respectively welded onto the end frames of the two ends by apron rings, and the end frames of the two ends are respectively connected with a vertical bottom beam and a reinforcing inclined support. A stair fixedly arranged on the end frame of one end is led to a path board fixedly arranged on the top of the tank-shaped container. An angle part, an angle column, a top beam, a bottom beam, the reinforcing inclined support and a top angle board are connected to form the end frame. A reinforcing plate is welded on the internal surface of the lower wall of a rectangular tube of the bottom beam. The tank-shaped container has the main advantages that the distance between the lower surface of the end part of the bottom beam of the end frame and the lower surface of the angle part of the end frame is enlarged, therefore, the stressing condition of the bottom beam of the end frame during conveying is enhanced and the service efficiency of the tank-shaped container is improved.

The invention discloses a modular quick-replacement power battery unit of an electromobile. The main body is provided with a plurality of same battery cells, the middle parts of the two opposite sides of each battery cell outwards extend and protrude to form a positive tab and a negative tab, the two ends of each battery cell are fixed on two vertical support plates by the positive tab and the negative tab, the battery cells are connected in series to form a battery module with the support plates, the battery module is arranged in a rectangular battery box, a gap between the battery box and the battery module is filled with a heat conduction material, and a positive electrode and a negative electrode of the battery module are jointly led out from a surface of the battery box and are arranged to be a positive connection plug and a negative connection plug. The power battery unit adopts a modular design, can be configured on different vehicles and is high in universality; during configuration, different configuration modes can be achieved according to actual conditions of a consumer; and through a battery replacement mode, the problems of long charging time and high charging requirement are solved.

The invention discloses a power battery of an electric automobile. The power battery is composed of a plurality of modularized battery units which are in serial, parallel or serial-parallel connection; and all the battery units are completely the same. The power battery is of modularized design, can be configured on different vehicle types, has good universality, has different configuration forms according to the actual conditions of consumers when the power battery is configured; and the problems of long charging time and high charging demand are solved through a power changing mode.