CN213322708U

CN213322708U - American-standard liquid-cooled direct-current charging socket for electric vehicle

Info

Publication number: CN213322708U
Application number: CN202022226445.5U
Authority: CN
Inventors: 臧昊哲; 杨国星; 臧重庆; 张艳丽
Original assignee: Luoyang Zhengqi Machinery Co ltd
Current assignee: Luoyang Zhengqi Machinery Co ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-06-01
Anticipated expiration: 2030-10-09

Abstract

The utility model discloses a beautiful mark liquid cooling direct current of electric vehicle socket that charges based on IEC62196-3 charging system standard, the direct current of American standard charges and is equipped with the signal line terminal in the casing of socket, PE earth terminal, the liquid cooling conductive terminal that still is equipped with direct current positive pole, direct current negative pole. The shape and position sizes of the conductive terminals meet the requirements of IEC62196-3 standard, the tail part of the liquid cooling conductive terminal is connected with a liquid cooling bus, and the other end of the liquid cooling bus is connected with a liquid cooling double-channel electrode of a direct current anode and a direct current cathode. The cooling liquid circularly flows in the direct current anode liquid cooling cable and the direct current cathode liquid cooling cable, and can well radiate and cool the soft lead in the liquid cooling bus and the liquid cooling conductive terminal in the direct current charging socket, so that the direct current charging cable can bear the charging current between 300 amperes and 600 amperes, can safely and reliably work, and is favorable for solving the problem of quick charging.

Description

American-standard liquid-cooled direct-current charging socket for electric vehicle

Technical Field

The utility model belongs to the technical field of electric vehicle charging device, concretely relates to beautiful mark liquid cooling direct current of electric vehicle socket that charges.

Background

The new energy electric automobile is rapidly developed around the world because of no exhaust emission and no environmental pollution. At present, two main factors for restricting the development of new energy electric automobiles are as follows: firstly, the battery has short endurance mileage; secondly, the charging duration.

Us standard dc charging socket: the conductive terminals of the DC positive electrode and the DC negative electrode are male terminals, and the conductive jacks in the American standard DC charging gun matched with the male terminals are female terminals.

In a standard direct current charging socket (dry type) in the united states, a dry type cable is connected with a non-liquid cooling direct current positive electrode conductive terminal and a direct current negative electrode conductive terminal. The soft wires in the direct current positive pole and direct current negative pole cables are 60 square millimeters, and one end of the soft wire is connected with the non-liquid-cooled direct current positive pole and direct current negative pole conductive terminals in the direct current charging socket; the other end (the end connected with the charging pile power supply) is connected with a common copper nose. The standard dc charging socket (dry type) in the united states carries a maximum current of 200 amps dc. The charging device is used for charging the household electric automobile, and the battery of the household electric automobile is fully charged, so that at least two hours are needed. The current situation of slow charging is urgently expected to change whether the car owner or the car enterprise.

The rapid charging method is characterized in that the charging voltage of the charging pile is improved, and the charging output current of the charging pile is increased. At present, the fast charging problem is researched and solved in all countries in the world, and the thinking and the method are the same. Along with the progress of new forms of energy electric automobile battery technology, improve the charging voltage who fills electric pile as far as, increase and fill electric pile and charge the electric current of output. The charging voltage of the charging pile is increased from 600 volts to 1000 volts; the current direct current of charging output of the charging pile is increased to 300-600 amperes.

The problem to be solved for the direct current charging socket of the American standard is how to safely bear the charging current between 300 and 600 amperes of direct current by the direct current positive electrode conductive terminals and the direct current negative electrode conductive terminals on the premise that the external dimension meets the requirements of the IEC62196-3 charging system standard.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that provides among the background art, the utility model provides a beautiful mark liquid cooling direct current of electric vehicle socket that charges.

A American standard liquid cooling direct current charging socket for an electric vehicle is based on the IEC62196-3 charging system standard, a signal line terminal, a PE ground line terminal and a liquid cooling conductive terminal provided with a direct current anode and a direct current cathode are arranged in a shell of the American standard direct current charging socket. The shape and position sizes of the signal wire conductive terminal, the PE ground wire terminal and the liquid cooling conductive terminal all accord with the following requirements: requirements of the IEC62196-3 standard. The tail part of the liquid cooling conductive terminal is connected with a liquid cooling bus, and the other end of the liquid cooling bus is connected with a liquid cooling double-channel electrode of a direct current anode and a direct current cathode.

Furthermore, the liquid-cooled conductive terminal is in a shaft shape, one end of the liquid-cooled conductive terminal is a closed plug end correspondingly connected with the direct current charging gun, and the other end of the liquid-cooled conductive terminal is a wire connecting end correspondingly connected with the soft wire; a small fixing flange which is protruded and used for being connected with the shell of the direct current charging socket is arranged in the middle of the outer diameter of the liquid cooling conductive terminal of the direct current charging socket; an annular groove is formed in the outer circular surface on the right side of the small fixed flange, an O-shaped sealing ring is arranged in the annular groove, and a conical insulating sleeve is arranged at the front end of the small fixed flange; the cooling cavity comprises a large inner diameter cavity and a small inner diameter cavity which are mutually communicated, the large inner diameter cavity is communicated with a cooling liquid outer channel of the liquid cooling bus through a lead connecting end, the small inner diameter cavity corresponds to the inner part of the closed plug end, a liquid cooling conductive terminal inner tube in the small inner diameter cavity is communicated with the cooling liquid inner channel of the liquid cooling bus, the cooling liquid inner channel of the liquid cooling bus extends to the bottom of the small inner diameter cavity from the liquid cooling conductive terminal inner tube, the liquid cooling conductive terminal inner tube is a metal tube, one end of the liquid cooling conductive terminal inner tube is an axial slot-shaped opening or a wedge-shaped opening or an inclined plane opening, and the front end of the liquid cooling conductive terminal inner tube is inserted into the conductive terminal cooling cavity, so that the front end of the liquid cooling conductive terminal inner tube is contacted with the closed; the outer circular surface of the other end of the inner tube of the liquid cooling conductive terminal is provided with a plurality of annular grooves, and the end is a rear end and is connected with a cooling liquid inner channel of the liquid cooling bus. And the inner channel of the cooling liquid of the liquid cooling bus is communicated with the small inner diameter cavity, and the outer wall of the closed plug end is a conductive part contacted with a conductive jack in the direct current charging gun.

Further, the liquid cooling bus is composed of three parts; the insulation outer sleeve is internally provided with a soft lead and a polytetrafluoroethylene tube, and the soft lead is woven on the outer wall of the polytetrafluoroethylene tube in a layered manner; the polytetrafluoroethylene tube penetrates through the center of the soft lead, an inner hole of the polytetrafluoroethylene tube is a cooling liquid inner channel, an annular gap is arranged between the insulating outer sleeve and the soft lead, and the annular gap is a cooling liquid outer channel of the liquid cooling bus.

Furthermore, one end of the electrode body of the liquid-cooling double-channel electrode is in threaded connection with a coaxial electrode pipeline; internal threads at the end of the electrode body; the external thread of the electrode pipeline is screwed, a locking nut is arranged on the external thread of the electrode pipeline at the screwed part, a step groove is arranged on the locking nut, a sealing ring is arranged in the step groove, and a tooth-shaped sealing groove is arranged on the outer pipe wall of the electrode pipeline; the inner cavity of the electrode pipeline is a wire connecting cavity of a soft wire, and the wire connecting cavity is opened at the end surface of the electrode pipeline; the electrode body is provided with a cooling liquid inlet and a cooling liquid outlet; all are connected with quick-operation joint on it, and the coolant outlet is close to electrode pipeline end, and the coolant entry is kept away from electrode pipeline end. An isolating layer is arranged between the inlet and the outlet of the cooling liquid in the electrode, and the center of the isolating layer is provided with an internal threaded hole. The electrode is internally provided with electrode cooling liquid, an electrode cooling liquid inner pipe is a metal hard pipe, one end of the electrode cooling liquid inner pipe is an external thread, the external thread is connected with an internal thread on an isolating layer in the electrode, and an inlet and an outlet of the cooling liquid are isolated and are not communicated with each other after the electrode cooling liquid inner pipe and the electrode cooling liquid inner pipe are connected; the other end of the electrode cooling liquid inner pipe is provided with a plurality of annular grooves, and the end of the electrode cooling liquid inner pipe extends out of the lead connecting cavity of the electrode and is connected with the cooling liquid inner channel of the liquid cooling bus. The electrode body is provided with a mounting seat, and the mounting seat is provided with a mounting hole.

Furthermore, the tail of the liquid cooling conductive terminal in the direct current charging socket is connected with a liquid cooling bus; the liquid cooling binary channels electrode is connected to the other end of liquid cooling bus, and the concrete connection is as follows, and the software wire in the liquid cooling bus is connected respectively: the wire connecting end of the liquid-cooling conductive terminal and the wire connecting cavity of the liquid-cooling dual-channel electrode; the connection mode is semicircular groove shape crimping, and the inner channel of the cooling liquid of the liquid cooling bus is respectively connected: the liquid cooling conductive terminal inner tube and the electrode cooling liquid inner tube; the connected mode is interference and cup joints, and the insulating outer tube of liquid cooling generating line cup joints respectively in: and the liquid cooling conductive terminal and the liquid cooling double-channel electrode are fastened by a clamp on the crenellated sealing groove.

Compared with the prior art, the beneficial effects of the utility model are that: continuously flowing circulating cooling liquid, entering an inner channel of a liquid cooling bus from a liquid inlet of a liquid cooling double-channel electrode, enabling the cooling liquid to pass through an inner tube of a liquid cooling conductive terminal of the liquid cooling conductive terminal and directly reach the bottom of a cavity of the conductive terminal in the American standard direct current charging socket, and then enabling the cooling liquid to flow back to cool and dissipate heat of the conductive terminal of the direct current charging socket; the cooling liquid continuously flows back to enter the cooling liquid outer channel of the liquid cooling bus and passes through the soft lead in the cooling liquid outer channel, the heat of the soft lead is taken away by the cooling liquid, and the flowing cooling liquid returns to the cooling system for cooling through the cooling liquid outlet of the liquid cooling double-channel electrode and then is recycled. The cooling liquid circularly flows in the direct current anode liquid cooling cable and the direct current cathode liquid cooling cable, and can well radiate and cool the soft lead in the liquid cooling bus and the liquid cooling conductive terminal in the direct current charging socket, so that the direct current charging cable can bear the charging current between 300 amperes and 600 amperes, can safely and reliably work, and is favorable for solving the problem of quick charging.

Drawings

FIG. 1: direct current positive pole or direct current negative pole liquid cooling cable structure chart.

FIG. 2: direct current positive pole, direct current negative pole liquid cooling conductive terminal structure chart in the direct current charging socket.

FIG. 3: direct current positive pole or direct current negative pole liquid cooling bus structure chart.

FIG. 4: direct current positive pole or direct current negative pole liquid cooling binary channels electrode appearance structure chart.

FIG. 5: the structure diagram of the inside of the direct current anode or the direct current cathode liquid cooling dual-channel electrode.

FIG. 6: a semicircular crimping sectional view of the soft conductor.

In the figure: 2.01 liquid cooling conductive terminal; 2.02, cooling the cavity; 2.03, a cavity with a small inner diameter; 2.04, a large inner diameter cavity; 2.05, a closed plug end; 2.06, connecting ends of wires; 2.07, fixing a small flange; 2.08, an annular groove; 2.09O-shaped sealing ring; 2.10, a conical insulating sleeve; 2.11, cooling the inner tube of the conductive terminal; 2.12, a tooth-shaped sealing groove of the horse teeth; 2.14, connecting ends of wires; 3.02, direct current positive pole, direct current negative pole liquid cooling generating line; 3.03, a polytetrafluoroethylene tube; 3.04, soft wire; 3.05, insulating an outer sleeve; 3.06, cooling liquid inner channels; 3.07, cooling liquid outer channels; 4.01, an electrode cooling liquid inner pipe; 4.02, electrode pipelines; 4.03, external threads of the electrode pipeline; 4.04, internal threads of the electrode body; 4.05, locking the nut; 4.06, sealing rings; 4.07, a tooth-shaped sealing groove of a horse tooth; 4.08, a lead connecting cavity; 4.09, a cooling liquid inlet; 4.10, a cooling liquid outlet; 4.11, a mounting seat; 5. and (5) clamping a hoop.

Detailed Description

Example 1

The utility model provides a beautiful mark liquid cooling direct current of electric vehicle socket that charges which characterized in that: based on IEC62196-3 charging system standard, a signal line conductive terminal, a PE ground terminal, a liquid cooling conductive terminal 2.01 with a direct current anode and a direct current cathode are arranged in a shell of a direct current charging socket of American standard; the signal wire conductive terminal, the PE ground wire terminal and the liquid cooling conductive terminal are 2.01, and the shape and position dimensions of the signal wire conductive terminal, the PE ground wire terminal and the liquid cooling conductive terminal all meet the requirements of IEC62196-3 standard; the tail part of the liquid cooling conductive terminal 2.01 is connected with a liquid cooling bus 3.02, and the other end of the liquid cooling bus 3.02 is connected with a liquid cooling double-channel electrode of a direct current anode and a direct current cathode.

The liquid cooling conductive terminal 2.01 is in a shaft shape, one end of the liquid cooling conductive terminal is a closed plug end 2.05 correspondingly connected with the direct current charging gun, and the other end of the liquid cooling conductive terminal is a wire connecting end 2.06 correspondingly connected with the soft wire 3.04; a small fixing flange 2.07 which is protruded and used for being connected with a shell of the direct current charging socket is arranged in the middle of the outer diameter of the liquid cooling conductive terminal 2.01 of the direct current charging socket; an annular groove 2.08 is formed in the right outer circular surface of the small fixed flange 2.07, an O-shaped sealing ring 2.09 is arranged in the annular groove 2.08, and a conical insulating sleeve 2.10 is arranged at the front end of the small fixed flange 2.07; the cooling cavity 2.02 comprises a large inner diameter cavity 2.04 and a small inner diameter cavity 2.03 which are communicated with each other, the large inner diameter cavity 2.03 is communicated with a cooling liquid outer channel 3.07 of the liquid cooling bus 3.02 through a lead connecting end 2.14, the small inner diameter cavity 2.03 corresponds to the inside of the closed plug end 2.05, a liquid cooling conductive terminal inner tube 2.11 in the small inner diameter cavity 2.03 is communicated with a cooling liquid inner channel 3.06 of the liquid cooling bus 3.02, the cooling liquid inner channel 3.06 of the liquid cooling bus 3.02 extends to the bottom of the small inner diameter cavity 2.03 from the liquid cooling conductive terminal inner tube 2.11, the liquid cooling conductive terminal inner tube 2.11 is a metal hard tube, one end of the liquid cooling conductive terminal inner tube 2.11 is an axial slot type opening or a wedge type opening or an inclined plane opening, and the front end is inserted into the cooling terminal cooling cavity, so that the front end of the liquid cooling conductive terminal inner tube is contacted with the closed bottom of the small inner diameter cavity; the outer circular surface of the other end of the inner tube 2.11 of the liquid cooling conductive terminal is provided with a plurality of annular grooves, and the end is the rear end and is connected with the inner cooling liquid channel 3.06 of the liquid cooling bus 3.02. And the inner channel 3.06 of the cooling liquid of the liquid cooling bus 3.02 is communicated with the cavity 2.03 with small inner diameter, and the outer wall of the closed plug end 2.05 is a conductive part contacted with a conductive jack in the direct current charging gun.

The liquid cooling bus 3.02 consists of three parts; the insulation outer sleeve 3.05, the soft wire 3.04, the polytetrafluoroethylene tube 3.03, the insulation outer sleeve 3.05 is provided with the soft wire 3.04 and a polytetrafluoroethylene tube 3.03, the soft wire 3.04 is braided on the outer wall of the polytetrafluoroethylene tube 3.03 by layers; the polytetrafluoroethylene tube 3.03 penetrates through the center of the soft lead 3.04, the inner hole of the polytetrafluoroethylene tube 3.03 is a cooling liquid inner channel 3.06, an annular gap is arranged between the insulating outer sleeve 3.05 and the soft lead 3.04, and the annular gap is a cooling liquid outer channel 3.07 of the liquid cooling bus 3.02.

One end of the electrode body of the liquid cooling double-channel electrode 4 is in threaded connection with a coaxial electrode pipeline 4.02; internal threads 4.04 at the end part of the electrode body; the electrode pipeline external thread 4.03 is screwed, a locking nut 4.05 is arranged on the electrode pipeline external thread 4.03 at the screwed part, a step groove is arranged on the locking nut 4.05, a sealing ring 4.06 is arranged in the step groove, and a horse-tooth-shaped sealing groove 4.07 is arranged on the outer pipe wall of the electrode pipeline 4.02; the inner cavity of the electrode pipeline 4.02 is a lead connecting cavity 4.08 of the soft lead 3.04, and the opening of the lead connecting cavity 4.08 is positioned on the end surface of the electrode pipeline 4.02; the electrode body is provided with a cooling liquid inlet 4.09 and a cooling liquid outlet 4.10; all be connected with quick-operation joint on it, coolant outlet 4.10 is close to electrode pipeline 4.02 end, and coolant inlet 4.09 keeps away from electrode pipeline 4.02 end, and in the inside of electrode, be provided with the isolation layer between coolant inlet 4.09 and coolant outlet 4.10, this isolation layer center has an internal thread hole. An electrode cooling liquid inner pipe 4.01 is arranged in the electrode, an electrode cooling liquid inner pipe 4.01 is a metal hard pipe, one end of the metal hard pipe is provided with an external thread, the external thread is connected with an internal thread on an electrode internal isolation layer, and after connection, an inlet 4.09 of the cooling liquid and a cooling liquid outlet 4.10 are mutually isolated and are not communicated; the other end of the electrode coolant inner tube 4.01 is provided with a plurality of annular grooves, and the end of the electrode coolant inner tube is extended outwards to form a lead connecting cavity 4.08 of the electrode and is connected with a coolant inner channel of the liquid cooling bus. The electrode body is provided with a mounting seat 4.11, and the mounting seat 4.11 is provided with a mounting hole.

The tail of the liquid cooling conductive terminal 2.01 in the DC charging socket is connected with a liquid cooling bus 3.02; liquid cooling binary channels electrode 4 is connected to the other end of liquid cooling bus 3.02, and the concrete connection is as follows, and software wire 3.04 in the liquid cooling bus 3.02 connects respectively: the lead connecting end 2.06 of the liquid cooling conductive terminal 2.01 and the lead connecting cavity 4.08 of the liquid cooling double-channel electrode 4; the connection mode is semicircular groove shape crimping, and the cooling liquid inner channel 3.06 of the liquid cooling bus 3.02 is respectively connected: a liquid cooling conductive terminal inner pipe 2.11 and an electrode cooling liquid inner pipe 4.01; the connected mode is interference bell and spigot joint, and the insulating outer tube 3.05 of liquid cooling generating line 3.02 cup joints respectively in: the liquid cooling conductive terminal 2.01 and the liquid cooling double-channel electrode 4 are fastened by a hoop 5 on the tooth-shaped sealing grooves 2.12 and 4.07.

The following are listed above: one end of the liquid cooling bus 3.02 is connected with the liquid cooling conductive terminal 2.01 in the DC charging socket, and the other end is connected with the liquid cooling double-channel electrode 4. The liquid cooling conductive terminal 2.01, the liquid cooling bus bar 3.02 and the liquid cooling dual-channel electrode 4 are integrally assembled together to form a complete direct current positive pole or direct current negative pole liquid cooling cable 3, as shown in fig. 1. The liquid cooling cable 3 is pressed and mounted at one end of the liquid cooling conductive terminal 2.01 and is arranged in the shell of the American standard direct current charging socket; the liquid cooling cable 3 contains one end of a dual channel electrode 4 outside the housing of the dc charging socket.

The purpose of liquid cooling is realized, and the cooling liquid is purified water, transformer oil, cooling liquid used by the electric automobile and the like, and the cooling liquid is a non-conductive liquid medium. A cooling system and a coolant on an electric vehicle may be used. The cooling liquid which circularly flows enters the inside of the liquid-cooling double-channel electrode 4 from a cooling liquid inlet 4.09 of the electrode; the cooling liquid enters a cooling liquid inner channel 3.06 of the liquid cooling bus 3.02 through an electrode cooling liquid inner tube 4.01, the cooling liquid passes through a liquid cooling conductive terminal inner tube 2.11 of the liquid cooling conductive terminal 2.01 and directly reaches the bottom of a cavity of the liquid cooling conductive terminal 2.01 in the American standard direct current charging socket, and then the cooling liquid flows back to cool and dissipate the heat of the liquid cooling conductive terminal 2.01 in the American standard direct current charging socket; the cooling liquid continuously returns to the cooling liquid outer channel 3.07 of the liquid cooling bus 3.02 in the liquid cooling conductive terminal 2.01; the cooling liquid passes through the soft conductor 3.04 in the cooling liquid outer channel 3.07 to take away the heat generated by the soft conductor 3.04 in the charging process. The cooling liquid returns to the cooling device for recirculation through a cooling liquid outlet 4.10 of the liquid-cooled dual-channel electrode 4. The cooling liquid flows circularly and continuously, and can well cool the liquid cooling double-channel electrode 4, the liquid cooling conductive terminal 2.01 in the American standard direct current charging socket and the soft lead 3.04 in the liquid cooling bus 3.02, so that the charging current between 300 and 600 amperes can be borne by the soft lead without overheating, and the charging is safe and reliable.

Claims

1. The utility model provides a beautiful mark liquid cooling direct current of electric vehicle socket that charges, is based on IEC62196-3 charging system standard which characterized in that: a signal line terminal, a PE ground terminal, a liquid cooling conductive terminal (2.01) of a direct current anode and a direct current cathode are arranged in a shell of the American standard direct current charging socket, the liquid cooling conductive terminal (2.01) is of an annular cavity structure, and the cavity is a cooling cavity (2.02); the signal line conductive terminal, the PE ground wire terminal and the liquid cooling conductive terminal (2.01) meet the requirements of IEC62196-3 standard in shape and position, the tail of the liquid cooling conductive terminal (2.01) is connected with a liquid cooling bus (3.02), and the other end of the liquid cooling bus (3.02) is connected with a liquid cooling double-channel electrode of a direct current anode and a direct current cathode.

2. The electric vehicle American-standard liquid-cooled DC charging socket as claimed in claim 1, wherein: the liquid cooling conductive terminal (2.01) is in a shaft shape, one end of the shaft is a closed plug end (2.05) correspondingly connected with the direct current charging gun, and the other end of the shaft is a lead connecting end (2.06) correspondingly connected with a lead in the liquid cooling bus (3.02); a small protruded fixing flange (2.07) which is used for being inserted into the direct current charging socket shell and axially positioned is arranged in the middle of the outer diameter of the liquid cooling conductive terminal (2.01) of the direct current charging socket; an annular groove (2.08) is formed in the outer circular surface of the right side of the small fixed flange (2.07), an O-shaped sealing ring (2.09) is arranged in the annular groove (2.08), and a conical insulating sleeve (2.10) is arranged at the end part of the closed plug end (2.05); the cooling cavity (2.02) comprises a large inner diameter cavity (2.04) and a small inner diameter cavity (2.03) which are communicated with each other, and the large inner diameter cavity (2.03) is communicated with a cooling liquid outer channel (3.07) of the liquid cooling bus (3.02) through a lead connecting end (2.14); the small inner diameter cavity (2.03) is a cavity of a liquid cooling conductive terminal inner tube (2.11) arranged in the large inner diameter cavity (2.04) and communicated with a cooling liquid inner channel (3.06) of the liquid cooling bus (3.02); a cooling liquid inner channel (3.06) of the liquid cooling bus (3.02) is communicated to the end part of the large inner diameter cavity (2.04) through a liquid cooling conductive terminal inner tube (2.11); the inner pipe (2.11) of the liquid cooling conductive terminal is a metal hard pipe, one end of the inner pipe (2.11) of the liquid cooling conductive terminal is an axial slot-shaped opening or a wedge-shaped opening or an inclined plane opening, the end is inserted into the large inner diameter cavity (2.04) of the conductive terminal, and the end part of the inner pipe (2.11) of the liquid cooling conductive terminal is contacted with the end part of the large inner diameter cavity (2.04); the outer circular surface of the other end of the inner tube (2.11) of the liquid cooling conductive terminal is provided with a plurality of annular grooves, the end is a rear end and is connected with the inner cooling liquid channel (3.06) of the liquid cooling bus (3.02), and the inner cooling liquid channel (3.06) of the liquid cooling bus (3.02) is communicated with the cavity (2.03) with the small inner diameter; the outer wall of the closed plug end (2.05) is a conductive part contacted with a conductive jack in the direct current charging gun.

3. The electric vehicle American-standard liquid-cooled DC charging socket as claimed in claim 2, wherein: the liquid cooling bus (3.02) comprises an insulating outer sleeve (3.05), a soft lead (3.04) and a polytetrafluoroethylene tube (3.03), wherein the soft lead (3.04) and the polytetrafluoroethylene tube (3.03) are arranged in the insulating outer sleeve (3.05), and the soft lead (3.04) is woven on the outer wall of the polytetrafluoroethylene tube (3.03) in a layered manner; the inner hole of the polytetrafluoroethylene tube (3.03) is a cooling liquid inner channel (3.06); an annular gap is arranged between the insulating outer sleeve (3.05) and the soft lead (3.04), and the annular gap is a cooling liquid outer channel (3.07) of the liquid cooling bus (3.02).

4. The electric vehicle American-standard liquid-cooled DC charging socket as claimed in claim 3, wherein: one end of the liquid cooling double-channel electrode is in threaded connection with a coaxial electrode pipeline (4.02); an internal thread (4.04) is arranged at one side end part of the electrode body, an external thread (4.03) of the electrode pipeline is arranged on the outer circular surface of one end of the electrode pipeline (4.02), the liquid-cooled dual-channel electrode is fixedly connected with the electrode pipeline (4.02) through a thread, and a locking nut (4.05) is arranged on the external thread (4.03) of the electrode pipeline at the threaded part of the electrode pipeline and the liquid-cooled dual-channel electrode; a step groove is formed in the locking nut (4.05), and a sealing ring (4.06) is arranged in the step groove; a horse tooth-shaped sealing groove (4.07) is arranged on the outer pipe wall of the electrode pipeline (4.02); the inner cavity of the electrode pipeline (4.02) is a lead connecting cavity (4.08) of the soft lead (3.04), and the lead connecting cavity (4.08) is opened at the end face of the electrode pipeline (4.02); the electrode body is provided with a cooling liquid inlet (4.09) and a cooling liquid outlet (4.10), the cooling liquid inlet (4.09) and the cooling liquid outlet (4.10) are both connected with quick connectors, the cooling liquid outlet (4.10) is close to the end of the electrode pipeline (4.02), and the cooling liquid inlet (4.09) is far away from the end of the electrode pipeline (4.02); an isolation layer is arranged in the liquid-cooling double-channel electrode and between a cooling liquid inlet (4.09) and a cooling liquid outlet (4.10), and the center of the isolation layer is provided with an internal threaded hole; an electrode cooling liquid inner pipe (4.01) is arranged in the electrode, the electrode cooling liquid inner pipe (4.01) is a metal hard pipe, one end of the metal hard pipe is provided with an external thread, the external thread is connected with an internal thread on an isolating layer in the electrode, and an inlet (4.09) of cooling liquid and an outlet (4.10) of the cooling liquid are isolated from each other after the connection; the excircle surface of the other end of the electrode cooling liquid inner pipe (4.01) is provided with a plurality of annular grooves, and the end extends out of a wire connecting cavity (4.08) of the liquid cooling double-channel electrode and is connected with a cooling liquid inner channel of the liquid cooling bus; the liquid cooling double-channel electrode is further provided with a mounting seat (4.11), and a mounting hole is formed in the mounting seat (4.11).

5. The electric vehicle American-standard liquid-cooled DC charging socket as claimed in claim 4, wherein: the tail of the liquid cooling conductive terminal (2.01) in the direct current charging socket is connected with a liquid cooling bus (3.02), and the other end of the liquid cooling bus (3.02) is connected with a liquid cooling double-channel electrode; a soft lead (3.04) in the liquid cooling bus (3.02) is respectively connected with a lead connecting end (2.06) of the liquid cooling conductive terminal (2.01) and an electrode pipeline (4.02) of the liquid cooling double-channel electrode, and the connection modes are semicircular groove-shaped crimping; the polytetrafluoroethylene tube (3.03) of the liquid cooling bus (3.02) is respectively connected with the liquid cooling conductive terminal inner tube (2.11) and the electrode cooling liquid inner tube (4.01), and the connection modes are interference sleeve; an insulating outer sleeve (3.05) of the liquid cooling bus (3.02) is respectively sleeved on the liquid cooling conductive terminal (2.01), the dentiform sealing groove (2.12) of the liquid cooling double-channel electrode and the dentiform sealing groove (4.07) of the dentiform sealing groove of the liquid cooling double-channel electrode, and the fastening modes are locking by a clamp (5).