95results about How to "Avoid puncture" patented technology

The invention relates to the technical field of new energy materials and devices, and discloses a lithium-sulfur battery difunctional diaphragm and a preparation method thereof, the lithium-sulfur battery difunctional diaphragm comprises a diaphragm substrate and a load slurry, the load slurry is coated on the surface of the diaphragm substrate; the loaded slurry comprises an electrocatalyst material, and the electrocatalyst material is a monatomic catalyst carbon-based material / diatomic catalyst carbon-based material. The monatomic catalyst carbon-based material is a nickel monatomic catalyst carbon-based material or a cobalt monatomic catalyst carbon-based material; the diatomic catalyst carbon-based material is a nickel-cobalt diatomic catalyst carbon-based material. The nickel-cobalt diatomic catalyst coupled carbon-based material is applied to the field of lithium-sulfur batteries and serves as a lithium-sulfur battery diaphragm modification material, sulfur redox kinetics can be promoted, the shuttle effect can be inhibited, lithium ion flux can be induced, so that lithium dendrite growth is inhibited, and finally the cycle performance of the lithium-sulfur batteries is improved.

The invention discloses a modified current collector and a preparation method thereof, a positive plate and a negative-electrode-free sodium ion battery, and relates to the technical field of sodium ion batteries. The aluminum oxide and the solid electrolyte sodium titanium aluminum phosphate grow on the aluminum metal three-dimensional substrate in situ, so that a higher ion conduction rate can be provided, the injection amount of the electrolyte can be reduced, the growth of dendritic crystals can be reduced, and the safety performance of the battery can be improved. The solid electrolyte (sodium aluminum titanium phosphate) and the artificial SEI film (sodium carbonate / sodium fluoride) are formed on the surface of the three-dimensional current collector, so that the deposition of sodium metal in a three-dimensional substrate is facilitated, and sodium dendrites can be prevented from growing on the surface of the current collector so as to prevent the diaphragm from being punctured. The solid electrolyte, the artificial SEI membrane and the cathode-free metal battery are used together, so that the effects of reducing the cost, prolonging the cycle life and improving the battery capacity density and safety are achieved.

The invention discloses a preparation method of a solar cell and the solar cell. The preparation method comprises the following steps: a main grid line of at least one main surface of the solar cell is formed by curing and printing low-temperature slurry, and other grid lines of the solar cell are formed by high-temperature sintering and printing high-temperature slurry except the main grid line formed by curing the low-temperature slurry. And the step of curing the printed low-temperature slurry is performed after the step of forming other grid lines. According to the scheme, the main grid lines on at least one main surface of the solar cell can be prevented from being in contact with the doping layer, so that the open voltage loss of the solar cell is effectively reduced.

The invention relates to the technical field of batteries, in particular to a lithium ion secondary battery. Comprising a positive plate, a diaphragm and a negative plate which are stacked and wound, along the winding direction, a current collector of the positive plate is provided with a positive active layer and an insulating layer; the insulating layer partially covers the positive active layer and partially covers the current collector; the insulating layer comprises first inorganic particles; the diaphragm comprises a base material layer and a ceramic layer positioned on at least one side surface of the base material layer, and the ceramic layer faces the positive plate; the ceramic layer comprises second inorganic particles; the ratio of the second Dv50 of the particle size of the second inorganic particles to the first Dv50 of the particle size of the first inorganic particles is 0.25-10, and the second Dv50 is not equal to the first Dv50. According to the lithium ion secondary battery disclosed by the invention, burrs on the positive plate are effectively reduced, the self-discharge and lithium separation problems of the battery are improved, and the cycle life of the battery is prolonged.

The invention belongs to the technical field of medical instruments, and particularly relates to an elastically fixed heart valve device. A resiliently secured heart valve device includes: a stent mechanism having an outer frame; and the anchoring pieces are evenly arranged on the peripheral face of the outer frame in the circumferential direction, anchoring piece openings facing the inflow end are formed between the anchoring pieces and the outer frame, and the anchoring pieces are provided with axial elastic parts capable of being axially compressed. Through the design of the axial elastic part which can be compressed axially, the anchoring part can be preset to be relatively long, after the valve is implanted, it is guaranteed that the free end of the anchoring part can effectively abut against the root of the valve ring, the anchoring part compresses the axial elastic part under the action of the valve ring, and therefore the axial elastic part can be compressed to be short under the action that the axial elastic part can be compressed to be short. And large force cannot be generated on the valve ring, so that the valve ring is prevented from being punctured by the anchoring piece.

The invention discloses a lithium negative electrode with a multi-layer composite artificial SEI film and a preparation method and application of the lithium negative electrode, and relates to the technical field of lithium batteries. Comprising a porous material, a lithium-loving layer, lithium metal and an inorganic composite material, a lithium-loving layer and lithium metal are sequentially deposited on one side of the porous material, and an inorganic composite material is deposited on the other side of the porous material; the porous material is at least one of a porous carbon material and a porous silicon material; the inorganic composite material is at least five of LiF, Li2O, Li3N, Li2CO3, Li2S, Li10GeP2S12 and Li3PO4, and the inorganic composite material is at least five of Li2CO3, Li2S, Li10GeP2S12 and Li3PO4. According to the invention, the lithium-loving sponge-like porous structure is constructed, the lithium deposition space is increased, the growth of lithium dendrites is effectively inhibited, the SEI layer is prevented from being punctured, and meanwhile, the artificial SEI layer with high stability, excellent ionic conductivity and mechanical strength is constructed by adopting the multifunctional inorganic composite material, so that the cycle performance, the safety and the overall efficiency of the lithium battery are improved.

The utility model provides a simple umbrella cover containing device and a folding umbrella, and relates to the technical field of umbrellas, the simple umbrella cover containing device comprises a stator and a rotor rotationally connected with the stator, the stator is used for being fixedly connected with an umbrella body, and the stator and the rotor form a containing space; one end, far away from the opening, of the umbrella cover is fixed on the rotor; the side, facing the containing space, of the stator is provided with a plurality of first resistance parts used for abutting against the inner surface of the umbrella cover in a protruding mode, or the side, facing the umbrella body, of the rotor is provided with a plurality of second resistance parts used for abutting against the outer surface of the umbrella cover, and the resistance parts abut against the umbrella cover to increase winding resistance. Therefore, when the rotor rotates relative to the stator, the umbrella cover is promoted to move in the axial direction of the umbrella body and be rolled in the containing space. Therefore, the problems that an existing umbrella cover storage device is inconvenient to store and operate, complex in structure and large in size are solved.

The present application provides a diaphragm-free lithium ion battery. The battery comprises a positive electrode current collector, a positive electrode active material, a solid electrolyte, a solvent, a negative electrode active material, and a negative electrode current collector. The solid electrolyte is a solid porous organic polymer, which contains specific functional groups, including weakly coordinated anion groups, and the corresponding cation of the anion group is lithium ion. The porous polymer is a solid powder, which can act as a barrier between the positive electrode active material and the negative electrode active material, eliminating the need for a diaphragm and greatly improving the safety performance of the battery.

The invention provides a portable circumference measuring device for primary school mathematics teaching, and the structure of the portable circumference measuring device comprises a circle center positioning body, a center block, straight columns, a size layer, and an edge positioning body, the circle center positioning body and the center block intersect with each other, and the right and left sides of the center block are connected with the straight columns. The lower layer of the straight column is provided with a size layer through which the edge positioning body penetrates, and the central area is also provided with a linear slide rail through which the edge positioning body slides in the size layer area; after the center block is further improved, the circle center positioning body can be detached through the circular adaptive groove in the block body, and meanwhile, the two straight columns are detached through the contact ends on the left side and the right side and the insertion grooves, so that the detachable effect is achieved; and then the situation that the original integral shape is difficult to load and carry can be replaced by simple disassembly and assembly, so that the portable characteristic can be achieved by collecting the parts through disassembly, and the situation that a large space of the schoolbag is occupied by an integral cross shape is avoided.

This utility model provides a corneal foreign body removal device, relating to the field of ophthalmic medical devices. It includes a handle, a working part, a connecting part, and a neck. The working part is fitted onto the middle of the outer wall of the handle, and the connecting part is located at one end of the handle. The neck is detachably connected to the handle via the connecting part. The device also includes a head, the tip of which is tilted at a certain angle to one side, forming a crescent-shaped curved surface. This crescent-shaped curved surface extends laterally along the inclined side to form a single-sided cutting edge. Through the cooperation of these structures, compared with existing technologies, it has the following advantages: First, the bidirectional inclined cutting edge structure significantly reduces the risk of corneal stroma tearing. The blunted rounded corners increase the contact area during device retraction, effectively avoiding secondary trauma caused by micro-movements of the eyeball and reducing the risk of corneal perforation. Second, different sizes of cutting edges can be replaced through the connecting part to adapt to differences in foreign body size, reducing the probability of misoperation due to repeated device adjustments.

The utility model relates to the technical field of fire-fighting boots, in particular to a high-comfort fire-fighting protective boot for firefighters, which comprises a boot sole, a toe cap, a vamp, a heel and a boot leg which are integrally arranged, a waterproof sock is jointly attached to the inner surface layers of the toe cap, the vamp and the boot leg, and the boot leg comprises a leg body, a tibia protective layer, an ankle protective layer and an ankle joint bending layer. By means of the arrangement of the waterproof socks on the inner surface layers of the boot vamps and the boot legs, it is guaranteed that when a fireman works in the environments such as wading, the feet cannot be soaked by water, and the waterproof socks further have the functions of high breathability, chemical protection and blood transmission and viral pathogen resistance; meanwhile, the tibia protection layer, the ankle protection layer and the ankle joint bending layer are arranged, and the design fully considers the protection requirements of different parts of the feet of the firefighter when the firefighter executes a task, so that the firefighter can quickly respond in an emergency, and the timeliness and the accuracy of rescue actions are improved.

The utility model provides a fracture steel wire rope connecting structure for coal conveying belt replacement, and relates to the field of connecting structures, the fracture steel wire rope connecting structure comprises a connecting piece and a traction rope, the traction rope is connected to the outer side of the connecting piece, the connecting piece comprises a structural block, a fixed clamping part is connected to the outer side of the structural block, and a movable clamping part is hinged to the outer side of the structural block. Meanwhile, an electric push rod is hinged to the upper end of the structural block, the structural block comprises a receding groove formed in the outer wall, a hinge block is arranged on the outer side of the receding groove and located on the upper side of the fixed clamping part, the movable clamping part is rotationally connected with the hinge block, and the upper end of the movable clamping part is rotationally connected with the electric push rod. The connecting structure solves the problems that a connecting structure adopted for replacing an existing coal conveying belt is poor in stability, and a new belt is prone to being damaged.

The invention discloses a PCCP pipe bell and spigot joint sealing system manufacturing method and a PCCP pipe bell and spigot joint sealing system manufactured through the PCCP pipe bell and spigot joint sealing system. During manufacturing, a joint is filled with an elastic blocking piece, the elastic blocking piece is divided into a first sub-joint and a second sub-joint, and the elastic blocking piece is arranged in the joint in an abutting mode through a locking mechanism; mortar is poured into the first sub-joint through a reserved first grouting opening, and the locking mechanism is removed after the mortar does not flow; a base layer is arranged on the upper end face of an upper opening of the second sub-joint, anticorrosive paint is applied to the base layer to form an anticorrosive coating, the anticorrosive coating and the base layer form a plugging structure and seal the second sub-joint, and sealant is poured into the second sub-joint through a reserved second grouting opening; the elastic barrier piece is basically non-sticky to mortar and the like; the method is suitable for construction in the low-temperature environment, the obtained sealing system can adapt to different stress interferences and different environmental factors, lasting sealing can be achieved, the construction technology can be simplified after the anti-corrosion coating is formed in a front-arranged mode, and the construction speed is high.

The utility model belongs to the technical field of sand core casting equipment, and particularly relates to a sand core drilling tool for casting an ejector rod hole, which comprises a base, an ejector rod hole drilling device and a sand core drilling device, a plurality of limiting blocks are distributed on the upper end face of the mould, and the limiting blocks are matched with one another to form a sand core placing position; the drilling mechanisms are arranged along the horizontal direction and are respectively aligned with the corresponding processing surfaces of the sand core; the sliding mechanism is used for bearing the mould and comprises sliding rails and moving parts capable of moving back and forth along the sliding rails, and limiting parts are arranged on the sliding rails and abut against the inner sides of the moving parts to limit transverse deviation of the sand cores on the mould; wherein a thrust block is arranged in the advancing direction of the sliding mechanism and is suitable for limiting the maximum stroke of the sliding mechanism so as to limit the hole depth of the sand core and prevent the drilling depth from exceeding the thickness of the side wall of the sand core, so that a drill bit is prevented from punching through the side wall of the sand core.

The utility model relates to new energy battery technical field and provide a kind of battery cell and power battery.The utility model discloses battery cell including pole group in battery cell shell, cover is located the battery cell cover plate of battery cell shell top, and is located between the isolating protective piece of battery cell cover plate and pole group.Isolated protective piece includes isolating sheet attached in the inside of battery cell cover plate, and protective sheet can be buckled on isolating sheet, and hot melt structure is equipped between isolating sheet and protective sheet;Isolating sheet is equipped with the pole post via hole of the pole post on battery cell cover plate, and corresponding pole post via hole, protective cavity is equipped on protective sheet;In the case where protective sheet is buckled on isolating sheet, protective sheet is fixedly connected on isolating sheet by hot melt structure, protective cavity is received in the position below the bottom of pole post for the welding of tab, and the bottom of protective cavity is protruding towards pole group and abuts on pole group.The utility model discloses battery cell, it is favorable to improve the isolation protection effect between battery cell cover plate and its pole post and pole group.

The utility model relates to the technical field of labor protection, in particular to a breathable labor protection shoe which comprises a sole and a vamp connected to the sole, and an anti-smashing cover is arranged in the portion, located on a toe cap, in the vamp. The anti-smashing cover comprises a bottom plate, an upper cover face and a lower cover face, the upper cover face and the lower cover face are connected to the bottom plate, and a crumple buffering cavity is formed between the upper cover face and the lower cover face. The upper cover face is provided with a first air hole set communicated with the crumple buffering cavity, the lower cover face is provided with a second air hole set communicated with the crumple buffering cavity, and the first air hole set and the second air hole set are arranged in a staggered mode. And a better ventilation effect is achieved.

The invention discloses a display panel, a preparation method of the display panel and a display device. The display panel comprises a substrate, a pixel anode layer arranged on one side of the substrate, a pixel definition layer on the side, away from the substrate, of the pixel anode layer, a pixel light-emitting layer on the side, away from the substrate, of the pixel definition layer and a pixel cathode layer on the side, away from the substrate, of the pixel light-emitting layer. The pixel light-emitting layer comprises a charge generation layer; the charge generation layers cover the pixel opening areas and extend from the pixel opening areas to two pixel definition areas adjacent to the pixel opening areas, and the charge generation layers of the adjacent pixel opening areas are disconnected; a bubble structure is arranged at the position, corresponding to the discontinuous area, in the pixel light-emitting layer, and the bubble structure is located between the side, away from the substrate, of the charge generation layer and the pixel cathode layer. The charge generation layer and the pixel cathode layer can be separated by using the bubble structure, so that the situation that a leakage path is formed in the display panel due to the fact that the pixel cathode layer is easily lapped with the charge generation layer is avoided.

The application belongs to the technical field of batteries, and particularly relates to a gel electrolyte, a preparation method and a lithium ion battery; the gel electrolyte comprises a polymer matrix in which two-dimensional layered nanosheets are uniformly intercalated in situ, and an ionic liquid loaded in the polymer matrix; a solute of the ionic liquid comprises an electrolyte lithium salt, and a solvent of the ionic liquid comprises vinylene carbonate; in the technical scheme provided by the embodiment of the application, a new gel electrolyte is obtained by intercalating two-dimensional layered nanosheets in a polymer matrix in situ, the ionic conductivity of the gel electrolyte is improved by improving the gel electrolyte, and the conductivity of the gel electrolyte reaches 10 ‑3 S / m, thereby avoiding dendrites formed by lithium ion deposition from piercing a passivation film, directly improving the thermodynamic and electrochemical stability of the gel electrolyte, and widening the working voltage and temperature range of the battery.

The application discloses a preparation method of a single-crystal metal lithium negative electrode. The single-crystal metal lithium negative electrode with a dense packing surface Li(110) is obtained by annealing a polycrystal metal lithium foil horizontally placed after being heated in vacuum or inert atmosphere, and is directly used for battery assembly. The application remarkably improves the electrode reaction process kinetics of the metal lithium negative electrode by reducing the self-diffusion barrier of the surface of the metal lithium negative electrode, widens the safety boundary of the metal lithium negative electrode, and enables the metal lithium negative electrode to have no dendrite growth in a practical current density range. The prepared single-crystal metal lithium negative electrode can be directly used for battery assembly, and remarkably improves the cycle stability and safety of a high-specific-energy metal lithium battery, and promotes the development of practical high-safety metal lithium batteries.

The application discloses a robot joint protection assembly based on a foamed aluminum buffer structure and relates to the technical field of robot protection.The device ingeniously introduces passive active heat dissipation (energy-saving and high-efficiency) without additional fans or power driving, skillfully converts the motion kinetic energy of the robot into wind pressure, realizes intelligent heat management of 'heat dissipation during work and air suction during stop', effectively reduces the motor temperature, significantly prolongs the service life, and is mechanically self-cleaning and low in maintenance cost: aiming at the pain point of dust in industrial environment, full-automatic dust scraping and centrifugal dust removal are realized by using a pure mechanical structure, which not only eliminates secondary pollution caused by dust falling back, but also avoids the trouble of artificial regular disassembly and cleaning, and greatly reduces the later operation and maintenance cost.

The invention relates to the field of agricultural equipment, in particular to big data intelligent plateau agricultural field ridge film mulching equipment which comprises a film mulching device. When the auger feeder rotates, the pricking needles are synchronously driven to prick into soil to crush soil blocks, meanwhile, the pricking needles stir the soil blocks to make the soil blocks close to the auger feeder and the baffle to make contact with the auger feeder and the baffle, the soil blocks are extruded and crushed through cooperation of the auger feeder and the baffle, and the soil blocks are driven by the auger feeder to be conveyed to the two sides; pits of ridges are filled with broken soil blocks, meanwhile, weeds on the ridges are scraped and pulled out through pricking needles, the weeds are wound on the auger feeder and the pricking needles so as to clean the soil blocks, the weeds and the like on the ridges, and the situation that in the mulching film laying process, the edges of protruding soil blocks can pierce a mulching film, and after the weeds are covered with soil, the mulching film cannot be damaged is avoided. In the subsequent growth process of the weeds, the weeds can burst the mulching film covering the weeds, and the damaged mulching film can accelerate the loss of water in the field ridge.

The invention belongs to the technical field of probe contact micro-bumps, and discloses a probe contact micro-bump process, which comprises the following steps: acquiring the size, position and height parameters of a micro-bump, and determining the edge position of the micro-bump, the commanding height of the micro-bump and the target depth; the probe is controlled to move in the forward extension direction of the probe body in the horizontal coordinate plane, so that the probe head of the probe moves to the position right above the edge position of the micro-bump; the distance between the position of the probe head and the commanding height of the micro-bump is adjusted for the first time, after the first adjustment is completed, the position of the probe head is adjusted for the second time, and after the second adjustment is completed, the position of the probe head reaches the target depth; the probe is controlled to move in the direction opposite to the extension direction of the probe body in the horizontal coordinate plane, so that the side face of the probe body makes substantial contact with the micro-bump, the probe contact operation of the micro-bump is completed, the probe tip is prevented from cutting into the surface of the micro-bump, and therefore the lateral scraping length and the vertical overpressure depth when the probe makes contact with the micro-bump are reduced.

The utility model provides a wind wheel type packaging carton with a partition storage structure, which belongs to the technical field of packaging cartons and comprises a connecting ring, a partition protection component and a protection component, and the partition protection component comprises a plurality of storage boxes arranged on the inner wall of the connecting ring. When the storage box is used, a user can conveniently place articles needing to be stored and transported on the first protection pads in the storage boxes, hold the sealing covers after the storage boxes are full, cover the sealing covers and plug the second protection pads into the storage boxes to perform bidirectional protection on the articles in the storage boxes, and the articles are adhered to the connecting rings through the adhesive tape rings after the sealing covers are plugged into the storage boxes, so that the storage boxes are convenient to store and transport. According to the storage box, articles in the storage box are fixed, the storage box and the connecting ring are in a wind wheel shape, the independent storage box can be separated from other articles, and therefore the purposes that partition is easy to use and protection is achieved are achieved.

The invention aims to disclose a punch-formed ultrathin metal filtering material, a process, a filter and application, and relates to the technical field of punch forming, two surfaces of a metal base material with the thickness of 0.005 mm-0. 03mm are provided with a first reference horizontal plane and a second reference horizontal plane; the first reference horizontal plane is provided with a plurality of first convex hulls which protrude out of the first reference horizontal plane and are arranged in a first array, and the top of each first convex hull is provided with a first special-shaped micropore with the aperture of 20-60 microns; the second reference horizontal plane is provided with a plurality of second convex hulls which protrude out of the second reference horizontal plane and are arranged in a second array, and the tops of the second convex hulls are provided with second special-shaped micro holes with the hole diameter ranging from 20 micrometers to 60 micrometers; the ultra-thin metal filtering material has the beneficial effects that the two surfaces of the metal base material are synchronously stamped to form the ultra-thin metal filtering material, the ultra-thin metal filtering material has a good basis of high temperature resistance and corrosion resistance, and the first convex hulls and the second convex hulls form an uneven surface structure, so that the pollutant holding capacity of the filtering material can be improved.

The invention discloses a diaphragm as well as a preparation method and application thereof. The diaphragm is obtained by spinning a spinning solution containing a polymer and a polydopamine modified MOP crystal; and the thickness is 10-100 [mu] m. The polydopamine modified MOP is introduced into the polymer for blending, and the small crystal size of the MOP provides a powerful condition for dispersion of the MOP in the polymer; polydopamine modification can prevent agglomeration of MOP crystals, and also serves as an interface adhesive to repair gaps and promote hybridization of the MOP crystals and a polymer at a molecular level. The MOP crystal is rich in nanocage structures and provides a channel for ion transmission.

The invention relates to the technical field of nursing tools, in particular to a venous catheter indwelling nursing tool which comprises a first supporting leg and a second supporting leg connected to the first supporting leg and further comprises a fourth supporting leg and a third supporting leg, the fourth supporting leg and the third supporting leg are the same in structure, the fourth supporting leg is connected to the first supporting leg in an inserted mode, and the third supporting leg is connected to the second supporting leg in an inserted mode. Round corners are arranged at the end of the fourth supporting foot and the end of the third supporting foot, the fourth supporting foot can be matched with the third supporting foot to clamp the iodophor cotton ball, the scraping plate is connected to the end of the fourth supporting foot and the end of the third supporting foot, and a flow guide part is arranged on the lower portion of the scraping plate. The flow guide part can drive fester to guide flow of the iodophor cotton balls clamped by the fourth supporting leg and the third supporting leg. When the tool is actually used, the third supporting leg and the fourth supporting leg can drive the iodophor cotton ball to wipe the skin of a patient, and the skin of the patient can be prevented from being punctured by the third supporting leg and the fourth supporting leg.

The utility model relates to the technical field of power batteries, and provides a supporting piece, a cylindrical battery and a battery pack, the supporting piece is inserted into a through hole in the middle of a roll core of the cylindrical battery, one end of the supporting piece is provided with a guide surface, the guide surface is a curved surface, and the radial cross sectional area of the guide surface is gradually reduced along the direction of inserting the supporting piece into the through hole. According to the supporting piece, the guide head with the curved guide surface is arranged at one end of the supporting piece, and the radial area of the guide surface is gradually reduced in the direction of being inserted into the through hole, so that the supporting piece is more easily inserted into the through hole, the assembly efficiency can be improved, the supporting piece is prevented from damaging a roll core in the insertion process, and the service life of the roll core is prolonged. Therefore, the structural integrity and the performance stability of the roll core can be protected, and the use performance of the cylindrical battery can be ensured.

This invention discloses a positioning stent for convenient fixation and safe removal within human blood vessels, relating to the field of surgical medical device technology. The positioning stent comprises: a metal wire stent with multiple pointed positioning spikes, each spike including an inner metal wire and a covering layer; the inner metal wire is connected to the metal wire of the metal wire stent, the diameter of the inner metal wire being smaller than the diameter of the metal wire of the metal wire stent; the covering layer is conical and made of a biodegradable material; the tips of the inner metal wires and the tips of the covering layer are spaced a predetermined distance apart, and the middle portion of the inner metal wire forms a spiral portion; after the covering layer degrades, the spiral portion changes from a compressed state to an extended state, allowing the inner metal wire to pierce the blood vessel wall, with a predetermined gap between the blood vessel wall surface and the surface of the metal wire stent. This invention achieves reliable stent fixation and safe removal.

The present application relates to prestressed concrete box girder construction technical field, disclose a kind of steel strand bundle device and construction method, comprising: anchorage, with steel strand bundle anchoring connection;Traction piece, one end is connected with anchorage, the other end is conical and connects steel wire rope, steel wire rope is from the one end of plastic corrugated pipe, the other end is led out, the other end of steel wire rope is connected with winch.The steel strand bundle is anchored on anchorage, is connected with anchorage and winch by traction piece respectively, can the steel strand bundle is quickly from the one end of plastic corrugated pipe to the other end;The one end of traction piece and winch connection is conical, can greatly reduce resistance in the process of steel strand bundle traction, to improve the efficiency of steel strand bundle through plastic corrugated pipe, reduce the tension requirement of winch.The front end of steel strand bundle is anchored actually in the interior of traction piece, on the one hand can further reduce resistance, on the other hand can also avoid steel strand bundle front end puncture plastic corrugated pipe.

The invention relates to the technical field of batteries, in particular to a battery module and a preparation method thereof. The battery module comprises a battery cell body, a Breaker assembly and an insulating shell, a tab group is arranged at one end of the battery cell body and comprises a first tab and a second tab, and first insulating gummed paper is arranged at one end, close to the tab group, of the battery cell body; the Breaker assembly is adhered to the first insulating gummed paper and comprises a fuse, a first connecting piece and a second connecting piece, the fuse is positioned on one side close to the cell body, the first connecting piece is connected with the free end of the first tab, and the first connecting piece and the first tab are bent along the length direction of the first connecting piece; the insulating shell is arranged on the battery cell body in an injection molding manner and wraps the first tab, the first connecting piece, the fuse and part of the second connecting piece; wherein a shrink-proof opening is formed in the insulating shell, and the distance between the inner wall of the shrink-proof opening and the inner protection part is larger than or equal to the minimum distance needed by hot melt glue walking. Through the above structure, the bimetallic strip of the Breaker assembly is not afraid of a high-temperature and high-humidity environment and is not oxidized to lose efficacy any more.