35results about How to "Increase ampacity" patented technology

The invention discloses a cable for a new energy electric vehicle, and relates to the technical field of cables for new energy electric vehicles, and the cable comprises circulation cavities which are installed at the outer part of a cable wear-resistant protection sleeve at equal intervals, and are used for enabling gas to be dissipated from an exhaust cavity channel formed in the side surface of the circulation cavities in a surrounding manner when pressurized gas is generated in the circulation cavities, under the cooperation of the current-carrying capacity dynamic self-adaptive adjusting assembly, efficient conduction, resistance reduction and current-carrying capacity improvement are integrally and effectively realized, so that the conductivity of the cable is improved, the energy loss is reduced, the high requirement of a new energy electric vehicle on the cable can be met, the overall use performance and safety of the electric vehicle cable are improved, and the service life of the electric vehicle cable is prolonged. Meanwhile, under the cooperation of the dynamic adjusting assembly, when the current is increased, the internal pressure is dynamically reduced, the service life of the cable is prolonged, automatic adjustment and efficient heat dissipation of the internal pressure and temperature of the cable are achieved, and safe and stable operation of the cable for the new energy electric vehicle is guaranteed.

The utility model discloses a pin type PCB welding terminal, and relates to the PCB welding terminal technology field, the welding terminal comprises a welding terminal main body, the surface of the welding terminal main body is provided with a screw hole, the internal thread of the screw hole is connected with a bolt, the upper end of the bolt is fixedly connected with a screw cap, and the upper end of the screw cap is fixedly connected with a pin. The welding terminal comprises a welding terminal body, pins are symmetrically installed on the outer side of the welding terminal body, and the anti-skid piece is arranged in the welding terminal body and used for avoiding the situation that a bolt slips and falls off. According to the utility model, the side surface of the welding terminal main body is provided with the plurality of placing grooves for connecting the pins with different specifications, the pins in different directions can be assembled according to actual working requirements, the applicability is high, and the anti-skid piece is arranged, so that the phenomenon that the PCB cannot be normally used due to the fact that the bolt is loosened and falls off from the welding terminal main body is avoided, and the service life of the PCB is prolonged. And the overall practicability of the welding terminal is improved.

The invention discloses a corrugated seven-segment cable core structure, a cable structure and a production process, the corrugated seven-segment cable core structure comprises a central conductor and seven tile-shaped separation strand block conductors, and the seven tile-shaped separation strand block conductors are twisted around the central conductor to form a cable core with a circular cross section; the center conductor and the tile-shaped separation strand block conductors are isolated through graphene insulation paper, and the adjacent tile-shaped separation strand block conductors are isolated through graphene insulation paper. According to the invention, the current transmission channel is obviously increased. Meanwhile, the current transmission capability of the cable is improved by adopting a central conductor and seven-segment corrugated split conductor structure; the insulation paper doped with the graphene is used in the cable conductor, and the graphene has extremely low relative permeability, so that the magnetic flux density in the conductor is reduced, the heat energy generated by the action of a magnetic field is reduced, and the current-carrying capacity and the working efficiency of the cable are improved; and meanwhile, the current can be more uniformly distributed in the conductor, the alternating-current resistance and phase loss of the cable core are reduced, and the transmission efficiency of the cable is enhanced.

The utility model provides a novel high-current-carrying-capacity halogen-free low-smoke flame-retardant waterproof high-voltage cable, which comprises a conductor, an insulating layer, a buffer layer, a metal shielding layer, a waterproof layer and a cooling layer, and is characterized in that the surface of the conductor is tightly coated with the insulating layer to form an insulating integrated structure; the buffer layer surrounds the insulating layer and is arranged between the insulating layer and the metal shielding layer; the waterproof layer wraps the surface of the shielding layer and is arranged between the shielding layer and the cooling layer; according to the utility model, the halogen-free low-smoke flame-retardant polyolefin material is utilized, so that the cable has excellent chemical corrosion resistance and halogen-free low-smoke flame-retardant performance, the environmental protection property and the safety are improved, and the water-blocking layer and the cooling layer are arranged, so that the cable is moistureproof, and meanwhile, the cable can be used as a power cable. The cable operation temperature is effectively reduced, the current-carrying capacity is greatly improved, the cost is reduced, the danger caused by overhigh temperature when the cable is short-circuited is reduced, and the cable is simple in production process, easy to store for a long time, environment-friendly, pollution-free and convenient to produce, transport and construct.

The invention discloses a cable for new energy electric vehicles, relates to the technical field of cables for new energy electric vehicles, and comprises: a circulation cavity, which is equally divided and equidistantly arranged on the outside of a wear-resistant protective sleeve of a cable, and is used for dispersing the gas from an exhaust cavity opened around the side surface thereof when pressurized gas is generated inside; by cooperating with a dynamic adaptive current-carrying capacity adjustment component, the whole effectively realizes efficient conduction, reduces resistance, and increases current-carrying capacity, thereby improving the electrical conductivity of the cable, reducing energy loss, meeting the high requirements of new energy electric vehicles for cables, and improving the overall performance and safety of electric vehicle cables; at the same time, with the cooperation of the dynamic adjustment component, it is convenient to dynamically reduce the internal pressure when the current increases, thereby increasing the service life of the cable, realizing automatic adjustment of the internal pressure and temperature of the cable and efficient heat dissipation, and ensuring the safe and stable operation of the cable for new energy electric vehicles.

A busbar electric connecting wire clamp comprises a wire clamp body and clamping plates, the clamping plates are fixedly connected to the lower portions of the two sides of the wire clamp body through first bolt pairs, a groove is formed in the lower end face of the wire clamp body in the line direction, an elastic contact piece is fixed in the groove, and the lower end face of the elastic contact piece protrudes out of the groove; the wire clamp body is arranged above the busbar, the wire clamp body is clamped and fixed on the top of the busbar through the clamping plate, and the lower end face of the elastic contact piece abuts against the top of the busbar.

The invention relates to the technical field of cables, in particular to a large-section low-loss molded wire aluminum split conductor which comprises four fan-shaped strand blocks and a center line. According to the large-section low-loss molded wire aluminum split conductor, the four-split design is adopted, the production efficiency is greatly improved, each strand block adopts the aluminum molded wires, the filling coefficient is higher, the conductor with the larger section can be obtained by increasing the sector width and the sector height of each trapezoidal monofilament, the conductor is not limited by the number of the monofilaments, and the production efficiency is improved. The situation that more strand blocks are needed to obtain a larger cross section like a compact circular shape, and a single strand block is limited by the number of monofilaments is avoided; the filling coefficient of the compressed molded line is far larger than that of a compressed circular molded line, the water blocking performance of the molded line is higher, strand blocks are separated by the insulating water blocking strips, the effects of water blocking and eddy current segmentation can be achieved, the skin effect and proximity effect loss can be reduced, and optical fibers in the insulating water blocking strips can monitor the operating temperature of a conductor and improve the operating safety.

The utility model relates to the technical field of power equipment, and discloses an assembly type cable duct bank for increasing the current-carrying capacity of a cable, which comprises a plurality of cable duct bank units which are coupled and spliced, the center of the cross section of each cable duct bank unit is provided with a hollow heat dissipation hole, and a plurality of cable holes are uniformly distributed outside the heat dissipation hole; the tongue-and-groove side of the cable duct bank unit is provided with a horn mouth, and the other side of the cable duct bank unit penetrates into the horn mouth to be coupled and spliced; the top of the cable duct bank unit is provided with a hanging nail and a grounding steel plate. By adopting the hollow structure, the contact surface between the interior of the calandria and the air is increased, the heat dissipation is fast, and the current-carrying capacity of the cable is improved.

The utility model discloses a new energy vehicle liquid cooling charging pile cable, the cable includes the cable core, and the cable core periphery has the protection layer, the outer sheath from inside to outside in proper order and covers, the cable core includes 2 power line core, ground wire core, backflow pipe, 2 auxiliary power line core, control cable core, signal cable core, 2 power line core in the cable core symmetrical position, and ground wire core and backflow pipe are located respectively two sides of 2 power line core and with 3 power line core and is tangent outward, and the hole section area of backflow pipe is same with the conductor profile section area of power line core, and the present application has the superfast charging performance and reliability of large current.

The utility model discloses a liquid cooling cable and a charging device, the liquid cooling cable comprises a sheath layer and a cable group, and the sheath layer forms a cavity along the axial direction; the cable group is arranged in the cavity, the cable group comprises a bare conductor and an insulating layer sleeved on the outer side of the bare conductor, a cooling channel arranged along the axial direction is formed in the bare conductor, and a cooling medium is arranged in the cooling channel, so that the bare conductor is in direct contact with the cooling medium. According to the technical scheme of the utility model, the current-carrying capability and the cooling efficiency of the liquid-cooled cable are improved while the wire diameter is reduced.

The invention relates to the technical field of cables, and discloses a safety early warning cable with a temperature sensing function and a production process thereof.According to the cable, a spiral metal protection tube and a temperature measurement optical fiber are arranged in a conductor to form a core temperature measurement channel, and a redundant temperature measurement system is formed in cooperation with a multi-core sensing optical cable; vibration sources are accurately distinguished by combining two-way vibration sensing and AI signal recognition, and meanwhile, a multi-layer composite isolation layer and a three-dimensional heat conduction network are designed, so that efficient heat diffusion is achieved; according to the production process, the insulation performance of the cable and the stability of the sensing element are improved through a precise temperature control co-extrusion process, an online thermal stress relaxation treatment process and an optical fiber pre-fixing process. According to the invention, the temperature measurement reliability and the vibration identification precision are obviously improved, the cable thermal management capability is optimized, the service life is prolonged, the insulation eccentricity and the pre-crosslinking defect can be effectively reduced by the production process, and the overall quality of the product is improved.

The present invention belongs to the field of cables, and in particular, relates to a special-shaped cable, comprising a first outer sheath, two first electrical units, two second electrical units and a first reinforcement member, characterized in that the middle parts of the upper and lower sides of the main body of the first outer sheath are recessed inward to form two second cavities, in which a second electrical unit is arranged, and each recess is connected to two arc-shaped limiting components, a first cavity is formed inside the limiting component, in which a first electrical unit is arranged, the outer walls of the two limiting components corresponding to the same side are connected, and together with the limiting components, a reinforcement member cavity is formed, the first reinforcement member is located in the reinforcement member cavity, and two inflection points G are formed on the upper and lower sides of the first outer sheath main body corresponding to each second cavity. The present invention has the advantages of simple structure, low cost, high production efficiency, good heat dissipation performance, good pressure resistance, long service life, etc. The present invention also discloses a special-shaped optoelectronic hybrid cable.

The utility model discloses a conducting bar, which comprises a solid conducting bar body with a flat cross section, the conducting bar body comprises a main body part, a twisting part and a connecting part, the twisting part and the connecting part are sequentially connected with the end part of the main body part, the main body part is provided with a main body plane, and the connecting part is provided with a connecting plane. And the main body plane and the connecting plane are arranged at a certain angle. The utility model has the advantages of strong versatility and simple structure.

This invention discloses a cross-linked polyethylene insulated power cable and its preparation method, belonging to the field of power cable technology. The power cable, from the inside out, comprises: a conductor core, a conductor semi-conductive inner shielding layer, a main insulation layer, an insulating semi-conductive outer shielding layer, a semi-conductive buffer water-blocking layer, a corrugated metal waterproof sheath, and an outer sheath. The gaps between the conductor core strands are filled with semi-conductive resistive grease. The cable preparation method includes the following steps: S1, preparing the conductor core; S2, three-layer co-extrusion; S3, water-blocking layer extrusion; S4, sheath extrusion. This invention replaces the non-woven fabric tape with a foamed layer made from a blend of ethylene propylene diene monomer (EPDM) rubber and ethylene-vinyl acetate copolymer / styrene-butadiene rubber composite base material, achieving dynamic absorption of radial displacement in the cable. The synergistic effect of this dual design reduces fatigue cracking of the aluminum sheath caused by expansion thrust and prevents capacitive discharge caused by interfacial air gaps; thus improving the cable's current carrying capacity and periodic reliability.

The invention relates to the technical field of power cables, in particular to a middle-high voltage power cable for long-distance high-capacity power transmission and a preparation method of the middle-high voltage power cable for the long-distance high-capacity power transmission. The conductor shielding layer is coated on the outer wall of the layered split conductor; the insulating layer is coated on the outer wall of the conductor shielding layer; the insulating shielding layer is coated on the outer wall of the insulating layer; the buffer layer coats the outer wall of the insulation shielding layer; and the armor layer coats the outer wall of the buffer layer. The layered split conductor structure breaks through the process limitation of the number of traditional split conductor strand blocks, the composite insulation structure layer is composed of the micro-arc oxidation insulation separation layer and the composite elastic insulation rope, the ultra-thin and tough ceramic coating replaces crepe paper, the filling coefficient and the insulation reliability are improved, and through the filling buffering effect of the elastic rope, the insulation performance of the conductor is improved. And the integrity of the insulating coating under a harsh process is protected.

The invention discloses a cable trench backfill material prepared from muck, which is prepared from the following components in parts by weight: 1000 to 1500 parts of cement, 700 to 800 parts of calcined muck, 350 to 400 parts of limestone, 90 to 100 parts of gypsum, 7200 to 7800 parts of in-situ muck, 100 to 200 parts of polyacrylamide solution, 20 to 30 parts of macromolecular water-absorbent resin and 2200 to 2500 parts of water. The invention further discloses a preparation method of the cable trench backfill material prepared from the muck, the muck is used as a raw material of the backfill material, use of a cementing material is reduced, carbon emission is reduced, and the utilization rate of the muck is increased; the polyacrylamide and the high-molecular water-absorbent resin are combined to promote the high-molecular water-absorbent resin to absorb more moisture in a short time, so that the water retention performance of the backfill material is effectively improved.

The utility model relates to the technical field of power cables, and discloses a special-shaped stranded conductor power cable and a stranding processing device thereof.The special-shaped stranded conductor power cable further comprises a cable conductor, the outer side of the cable conductor is fixedly connected with an insulating layer, the outer side of the insulating layer is wrapped with a first wrapping tape, and the outer side of the first wrapping tape is wrapped with a second wrapping tape. And a filling layer is arranged between the first wrapping tape and the insulating layer. The twisting processing device comprises a bottom plate, and further comprises an inserting rod and a twisting assembly, the top of the bottom plate is fixedly connected with a supporting plate, the top of the bottom plate is fixedly connected with a twisting cylinder, the inserting rod is pulled out from the interiors of a U-shaped seat and a wire roller body through a shifting block, the wire roller body is convenient to replace, and the twisting efficiency is improved. The through holes of the wire roller body are aligned and inserted into the through holes of the U-shaped seats, then the clamping blocks are clamped into the annular grooves of the inserting rods, the inserting rods are limited, the inserting rods can only rotate, and replacement of the wire roller body is completed.

This utility model discloses an explosion-proof and flame-retardant liquid-cooled high-voltage automotive cable and its cable sheathing equipment. The cable includes a liquid-cooling pipe, a bare copper conductor, a wrapping layer, an explosion-proof tin-plated braided copper mesh, and a polyolefin insulation layer; the liquid-cooling pipe is located in the center of the cable. The cable sheathing equipment is a screw extruder, and the extrusion die is a double-layer die, including an inner die tube and an outer die tube. This utility model can effectively improve the cooling efficiency of the cable by setting up the liquid-cooling pipe, reducing the risk of fire caused by cable overload during the operation of electric vehicles, and improving the safety of electric vehicle operation. The cable sheathing equipment provided by this utility model, through the setting of the double-layer extrusion die, can effectively reduce the risk of compression deformation of the liquid-cooling pipe during the extrusion operation, ensuring the cooling efficiency of the cable.

This utility model discloses an airport lighting cable, comprising a conductor one and a conductor two. The conductor one and conductor two are twisted together, and the outer walls of both conductor one and conductor two are respectively covered with an insulation layer one. A metal layer is disposed on the outer wall of the insulation layer one, and an insulation layer two is disposed on the outer wall of the metal layer. The insulation layer two and the metal layer are connected by a covering process. This utility model relates to the field of airport lighting cable technology. This airport lighting cable, through the arrangement of conductor one, conductor two, insulation layer one, metal layer, insulation layer two, shielding layer, filling layer, and protective layer, improves conductivity. The use of high-purity copper or aluminum as conductors and the application of a multi-strand twisted conductor structure enhance the cable's conductivity and current carrying capacity, reduce power loss, ensure a stable power supply for airport lighting equipment, guarantee the normal operation of the lighting system, and enhance anti-interference capabilities.

The utility model discloses a submarine cable J-shaped pipe ventilation cooling automatic control device comprising a submarine cable J-shaped pipe air section structure, and a J-shaped pipe of the submarine cable J-shaped pipe air section structure is uniformly provided with four groups of ventilation structures with the same structure along the circumferential direction. The four ventilation structures are further connected with a ventilation opening automatic control device arranged in the submarine cable J-shaped pipe air section structure, the ventilation opening automatic control device is further connected with a transmission device installed on an offshore booster station platform, and the transmission device is further connected with a meteorological sensor installed on the offshore booster station platform in a wireless connection mode. According to the utility model, a good ventilation cooling effect of the submarine cable J-shaped pipe air section is realized.

This invention relates to the field of overhead power transmission conductor technology, and in particular to a tenon-and-mortise interlocking ultra-high strength aluminum alloy steel core conductor and its preparation method. The conductor comprises an ultra-high strength steel core and an outer ultra-high strength aluminum alloy conductive layer. The ultra-high strength steel core is a G3A grade galvanized steel core, and the ultra-high strength aluminum alloy conductive layer is composed of 3-4 layers of S / Z type tenon-and-mortise interlocking wires concentrically stranded. The S / Z type tenon-and-mortise interlocking wires are a single-layer, single-wire concave-convex interlocking structure. This invention optimizes the Mg-Si-Zr-RE-B multi-element alloy composition system, achieving a Mg to Si mass ratio of 1.0-1.4, and combines this with a "solution-cold drawing-double-stage aging" process. This maintains high conductivity while increasing tensile strength to ≥360MPa, achieving an excellent match of high strength and high conductivity, and significantly improving strength while ensuring unchanged conductivity.

The utility model provides a kind of axle counter anti-interference system suitable for 27.5KV system line, by optimizing the installation position of axle counter sensor along track, using electromagnetic shielding and distance attenuation principle, avoid its in strong electromagnetic interference source vicinity, reduce the influence of outside interference to axle counter sensor, to reduce the axle counter failure incidence;Specifically, according to different ballast type to take different anti-interference measures: for main line whole ballast, using axle counter point two ends separate grounding technology, utilize the low resistance characteristics of ground net, the interference current generated by rail return flow is introduced into the earth, reduce the traction current flowing through axle counter sensor, ensure the stable operation of axle counter equipment;For vehicle depot field gravel ballast, using current sharing technology, the rail return flow before and after axle counter point is evenly distributed to the surrounding track, effectively weaken the interference influence of large current on rail to axle counter sensor, ensure the normal work of axle counter equipment in the complex environment of vehicle depot.

The utility model relates to an electric lap joint structure and an inductor, and relates to the technical field of inductors, the electric lap joint structure comprises an aluminum core, a transition bar and a copper bar, the aluminum core comprises a vertical part and a straight part, the transition bar is arranged on the straight part of the aluminum core and is arranged between the straight part and the copper bar, and the transition bar is arranged between the vertical part and the copper bar. The aluminum core is electrically connected with the copper bar through the transition bar, and the aluminum core, the transition bar and the copper bar are fixed through bolts. The aluminum core and transition bar structure is used for replacing an all-copper inductor, aluminum serves as a material which is low in price and good in electric lead, and the production cost of the whole inductor can be reduced; the electric connection between the aluminum core and the copper bar adopts the transition bar for bridging, so that the direct contact between aluminum and copper is avoided, and the electrochemical corrosion is effectively avoided; and a bolt fixing mode is adopted, so that the complexity of a production process is reduced, the problem of material stress possibly caused by high-temperature welding can be avoided, and the reliability and stability of the inductor are further improved.

The invention belongs to the technical field of off-circuit tap switches, and particularly relates to a compact type wafer structure and an off-circuit tap switch comprising the compact type wafer structure. Comprising a static contact, a supporting assembly and a moving contact assembly. The plurality of static contacts are arranged in pairs along the vertical direction; the supporting assembly comprises a guide rod and a side rod; the moving contact assembly comprises a supporting piece, a moving contact group and a spring group; the invention is mainly used for providing a compact type contact piece structure which is simple in structure, good in stability and convenient to use, and providing an off-circuit tap-changer which is smaller in occupied space, more in connecting contacts and higher in bearing capacity on the basis of the compact type contact piece structure. The invention mainly aims to reduce the volume and mass of the existing off-circuit tap-changer, reduce the process and material cost, improve the current-carrying capacity of the tap-changer, optimize the structural performance of the tap-changer, reduce the use and maintenance cost of the tap-changer, and further improve the economic benefit and stability of a power distribution network.

The utility model belongs to the technical field of cables, and discloses a 10kV polypropylene insulated power cable, which comprises three groups of cable cores, the three groups of cable cores are lapped together through a cable wrapping tape, a polypropylene rope filling layer is arranged in a gap between the cable cores and the cable wrapping tape, a polyvinyl chloride sheath layer is wrapped outside the cable wrapping tape, and the polyvinyl chloride sheath layer is wrapped outside the cable wrapping tape. Each cable core comprises a stranded copper conductor, a polypropylene semi-conductive conductor shielding layer coats the outside of each stranded copper conductor, a polypropylene insulating layer coats the outside of each polypropylene semi-conductive conductor shielding layer, and a polypropylene semi-conductive insulating peelable shielding layer coats the outside of each polypropylene insulating layer. The polypropylene semi-conductive conductor shielding layer, the polypropylene insulating layer and the polypropylene semi-conductive insulating strippable shielding layer are sequentially arranged outside the stranded copper conductor, so that catenary three-layer co-extrusion with lower eccentricity can be realized, the production efficiency is improved, and the carbon emission can be reduced by more than 40%.

The utility model discloses a copper core aerial cable which comprises a soft copper core conductor, a conductor wrapping layer, a conductor shielding layer, an insulating layer and an outer sheath layer, and the conductor wrapping layer, the conductor shielding layer, the insulating layer and the outer sheath layer are sequentially wrapped outside the soft copper core conductor from inside to outside. The soft copper core conductor comprises a plurality of strands, the plurality of strands are twisted to form the soft copper core conductor, the strands comprise a plurality of soft copper single wires, the plurality of soft copper single wires are twisted to form the soft copper single wires, and gaps among the strands are filled with water-blocking paste. The copper core aerial cable provided by the utility model has the performances of good flexibility, small resistance and the like, and solves the problems of poor bending performance, large conductor loss, high construction cost, large construction difficulty and the like in the use process of the conventional aerial insulated cable.

The invention discloses an insulating material for a light submarine cable, a preparation method of the insulating material and the light submarine cable, and relates to the technical field of submarine cables. The insulation material for the light submarine cable prepared by the invention is prepared from the following raw material components in parts by weight: 65.4 to 65.6 parts by mass of modified polypropylene, 13 to 15 parts by mass of modified boron nitride, 19 to 21 parts by mass of a composite flame retardant and 0.4 to 0.6 part by mass of an antioxidant, wherein the modified polypropylene is obtained by modifying polypropylene with allyl-terminated cyclotriphosphazene; the modified boron nitride is obtained by modifying hydroxylated hexagonal boron nitride with vinyl trimethoxy silane; the composite flame retardant is prepared by compounding 12.92 to 14.28 parts by mass of ammonium polyphosphate and 6.08 to 6.72 parts by mass of melamine; the insulating material prepared by the invention is relatively good in flame retardance, thermal conductivity and mechanical property.

The utility model discloses an MNS type switch cabinet in the technical field of MNS power distribution cabinets, which comprises a cabinet body, a support plate is fixedly mounted in an inner cavity of the cabinet body, the support plate divides the inner cavity of the cabinet body into a bus chamber and a drawer chamber, and a heat dissipation mechanism is arranged at the top of the bus chamber; the heat dissipation mechanism comprises a fixing plate, the fixing plate is fixedly installed on the top of the cabinet body and located over the bus chamber, a plurality of heat dissipation fins are inserted into the surface of the fixing plate from left to right at equal intervals, and a shell is fixedly installed on the top of the cabinet body. And the plurality of cooling fins are inserted in the surface of the fixed plate, when the temperature in the bus chamber is too high, heat can be dissipated outwards through the cooling fins, heat is concentrated in the shell through the cooling fins, and ventilation holes are formed in the surface of the shell, so that heat is dissipated outwards, the current-carrying capacity of the main bus bar can be improved, the use amount of copper bars is saved, and the service life of the main bus bar is prolonged. And the service life of the MNS switch cabinet is prolonged.

A male terminal of the wire-to-board small-space connector is provided with a plugging part at the front end and a riveting part at the rear end, the plugging part is provided with a contact main body, a contact pressurization part and a posture control part, the contact pressurization part is used for enhancing the contact conduction state of the contact main body, and the posture control part limits the contact pressurization part in a certain space. The contact pressurizing part is kept in a set posture and has a pressurizing property; the female terminal is provided with a slot defined by a bottom plate, a left side plate, a right side plate and a top plate, the slot is matched with the insertion part of the male terminal for insertion connection, and the contact relationship between the contact main body and the inner wall of the slot is enhanced through the stress of the contact pressurization part in the slot; and the female terminal is provided with a stop part for limiting the insertion depth of the insertion part and a clamping part for limiting the insertion and retreat of the insertion part. According to the utility model, close contact connection of the male terminal and the female terminal is ensured, a large contact area is obtained, the conductivity is stronger, deformation and failure of the contact pressurization part can be prevented, and the service life is prolonged.