CN213322711U

CN213322711U - European standard liquid cooling direct current charging socket for electric vehicle

Info

Publication number: CN213322711U
Application number: CN202022228199.7U
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 European standard liquid cooling DC charging socket for electric vehicles, based on IEC62196-3 charging system standard, a signal line terminal, a PE ground wire terminal and a liquid cooling conductive terminal of a DC positive DC negative electrode are arranged in the shell of the European standard DC charging socket; the shapes and the positions of the signal wire conductive terminal, the PE ground wire terminal and the liquid cooling conductive terminal meet the requirements of IEC62196-3 standard; the tail part of the liquid cooling conductive terminal is connected with a liquid cooling bus of a direct current anode or a direct current cathode, and the other ends of the liquid cooling bus of the direct current anode and the direct current cathode are connected with liquid cooling double-channel electrodes of the direct current anode and the direct current cathode.

Description

European standard liquid cooling direct current charging socket for electric vehicle

Technical Field

The utility model belongs to the technical field of electric vehicle charging connector, concretely relates to European standard liquid cooling direct current that electric vehicle used fills electrical socket.

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.

European standard dc charging socket: the conductive terminals of the direct current anode and the direct current cathode are male terminals and are female terminals of conductive jacks in the European standard direct current charging gun matched with the male terminals.

In the European standard dry type direct current charging socket, a dry type cable is connected with a non-liquid-cooled direct current positive electrode conductive terminal and a non-liquid-cooled direct current negative electrode conductive terminal. The soft wires in the direct current positive electrode cable and the direct current negative electrode cable are 60 square millimeters, one end of the soft wire is connected with the non-liquid-cooled direct current positive electrode conductive terminal and the direct current negative electrode conductive terminal in the direct current charging socket, and the other end (namely the end connected with the charging pile power supply) of the non-liquid-cooled direct current positive electrode in the direct current charging socket is connected with a common copper nose. The european standard dry dc charging socket, which can carry a maximum current of 200 a 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 output by charging of the charging pile is increased from 200 amperes of direct current to 300 to 600 amperes of direct current.

The problem to be solved for the direct current charging socket in the european standard is how to safely carry the charging current between 300 and 600 amperes through the direct current positive and negative conductive terminals on the premise that the external dimensions of the direct current positive and negative conductive terminals in the direct current charging socket meet the requirements of the IEC62196-3 charging system standard.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem mentioned in the background art, the utility model provides a European standard liquid cooling DC charging socket that electric vehicle used.

A European 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 terminal and a liquid cooling conductive terminal of a direct current anode direct current cathode are arranged in a shell of the European standard direct current charging socket. The liquid cooling conductive terminal is of a cavity structure, and the cavity is a cooling cavity. The signal wire conductive terminal, the PE ground wire conductive terminal and the liquid cooling conductive terminal are all in shape and position sizes meeting the requirements of IEC62196-3 charging system standards; 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-cooling conductive terminal is in a shaft shape, one end of the liquid-cooling conductive terminal is a closed plug end correspondingly connected with the direct-current charging gun, the other end of the liquid-cooling conductive terminal is a wire connecting end correspondingly connected with the liquid-cooling bus, and a small fixing flange 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; the front end of the small fixed flange is provided with a conical insulating sleeve, 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 a 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 hard 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 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 bottom of the small inner; 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, the soft lead is internally provided with a polytetrafluoroethylene tube, and the soft lead is woven on the outer wall of the polytetrafluoroethylene tube in layers; 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 liquid-cooling double-channel electrode body 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. And an isolating layer is arranged in the electrode between the inlet and the outlet of the cooling liquid, and is provided with an internal thread hole and a through hole. An electrode cooling liquid inner pipe is arranged in the electrode, the 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 a cooling liquid inlet and a cooling liquid outlet of the electrode are isolated and not communicated with each other after the electrode cooling liquid inner pipe is 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 other end of the liquid cooling bus is connected with the liquid cooling double-channel electrode, and the liquid cooling bus is specifically connected as follows: the soft wires in the liquid cooling bus are respectively connected: the wire connecting end of the liquid-cooled conductive terminal and the wire connecting cavity of the liquid-cooled dual-channel electrode are connected in a semicircular groove-shaped crimping mode; the inner channels of the cooling liquid of the liquid cooling bus are respectively connected: the liquid cooling conductive terminal inner tube and the electrode cooling liquid inner tube are connected in an interference sleeving manner; the insulating outer sleeve 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. The direct current charging socket is a complete liquid cooling cable, and the direct current positive electrode liquid cooling cable and the direct current negative electrode liquid cooling cable are installed in a direct current charging socket for the electric vehicle, and the direct current charging socket has a liquid cooling function.

Compared with the prior art, the beneficial effects of the utility model are that: continuously flowing circulating cooling liquid enters an inner channel of the liquid cooling bus from a liquid inlet of the liquid cooling double-channel electrode, the cooling liquid passes through an inner tube of a liquid cooling conductive terminal of the liquid cooling conductive terminal and directly reaches the bottom of a cavity of the conductive terminal in the European standard direct current charging socket, and then the cooling liquid flows 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, the structure diagram of the dc positive or dc negative liquid cooling cable.

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, a conical insulating sleeve; 2.09, cooling the inner tube of the conductive terminal; 2.10, a tooth-shaped sealing groove of the horse teeth; 2.12, connecting ends of wires; 3.01, a polytetrafluoroethylene tube; 3.02, soft leads; 3.03, insulating outer sleeves; 3.04, cooling liquid inner channels; 3.05, 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

As shown in fig. 1 to 6, a european standard liquid-cooled dc charging socket for an electric vehicle is based on IEC62196-3 charging system standard, a signal line terminal, a PE ground line terminal, and a liquid-cooled conductive terminal 2.01 having a dc positive electrode and a dc negative electrode are provided in a housing of the european standard dc charging socket; the liquid cooling conductive terminal (2.01) is a 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 are all in accordance with the requirements of IEC62196-3 standard in shape and position sizes, the tail of the liquid cooling conductive terminal 2.01 is connected with a liquid cooling bus 3.06, and the other end of the liquid cooling bus 3.06 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 shaft-shaped, one end is a closed plug end 2.05 correspondingly connected with the direct current charging gun, the other end is a lead connecting end 2.06 correspondingly connected with a liquid cooling bus 3.06, and 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; the front end of the small fixed flange 2.07 is provided with a conical insulating sleeve 2.08, 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 2.04 is communicated with a cooling liquid outer channel 3.05 of the liquid cooling bus 3.06 through a lead connecting end 2.12, the small inner diameter cavity 2.03 corresponds to the inside of the closed plug end 2.05, the liquid cooling conductive terminal inner tube 2.09 in the small inner diameter cavity 2.03 is communicated with the cooling liquid inner channel 3.04 of the liquid cooling bus 3.06, the cooling liquid inner channel 3.04 of the liquid cooling bus 3.06 extends to the bottom of the small inner diameter cavity 2.03 from the liquid cooling conductive terminal inner tube 2.09, the conductive terminal liquid cooling inner tube 2.09 is a metal hard tube, one end of the liquid cooling conductive terminal inner tube 2.09 is one of an axial slot type opening or a wedge type opening or an inclined plane opening, and the front end is inserted into; the outer circular surface of the other end of the inner tube 2.09 of the liquid cooling conductive terminal is provided with a plurality of annular grooves, the end is a rear end, and the annular grooves are connected with a cooling liquid inner channel 3.04 of the liquid cooling bus. And the inner cooling liquid channel 3.04 of the liquid cooling bus is communicated with the small inner diameter cavity 2.03, 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 3.06 is composed of three parts; 3.03 of an insulating outer sleeve, 3.02 of a soft lead and 3.01 of a polytetrafluoroethylene tube, 3.02 of the soft lead is arranged in the insulating outer sleeve 3.03, 3.01 of the polytetrafluoroethylene tube is arranged in the soft lead 3.02, and the soft lead 3.02 is layered and woven on the outer wall of the polytetrafluoroethylene tube 3.01; the polytetrafluoroethylene tube 3.01 penetrates through the center of the soft lead 3.02, the inner hole of the polytetrafluoroethylene tube 3.01 is a cooling liquid inner channel 3.04 of the liquid cooling bus 3.06, an annular gap is arranged between the insulating outer sleeve 3.03 and the soft lead 3.02, and the annular gap is a cooling liquid outer channel 3.05 of the liquid cooling bus 3.06.

One end of the liquid cooling double-channel electrode is in threaded connection with a coaxial electrode pipeline 4.02; the internal thread 4.04 on the electrode body is connected with the external thread 4.03 of the electrode pipeline in a screwing mode, the external thread 4.03 of the electrode pipeline at the screwing position is provided with a locking nut 4.05, the locking nut 4.05 is provided with a step groove, a sealing ring 4.06 is arranged in the step groove, and the outer pipe wall of the electrode pipeline 4.02 is provided with a horse-tooth-shaped sealing groove 4.07; the electrode pipeline 4.02 is provided with a lead connecting cavity 4.08 communicated with the cooling liquid outer channel 3.05, 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 which are connected with quick connectors, the cooling liquid outlet 4.10 is close to the electrode pipeline 4.02 end, and the cooling liquid inlet 4.09 is far away from the electrode pipeline 4.02 end. Inside the electrode, a separation layer is arranged between the inlet 4.09 of the cooling liquid and the outlet 4.10 of the cooling liquid, and the separation layer is provided with an internal threaded hole and a through 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 electrode cooling liquid inner pipe is provided with an external thread, the external thread is connected with an internal thread on an isolating layer in the electrode, and after the electrode cooling liquid inner pipe is connected, an inlet 4.09 of cooling liquid and an outlet 4.10 of the cooling liquid are isolated from each other 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 3.06; the other end of the liquid cooling bus 3.06 is connected with the liquid cooling double-channel electrode, and the liquid cooling double-channel electrode is specifically connected as follows: the soft conductors 3.02 in the liquid cooling bus 3.06 are respectively connected: 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 dual-channel electrode are connected in a semicircular groove-shaped crimping mode; the inner cooling liquid channel 3.04 of the liquid cooling bus 3.06 is respectively connected with: the liquid cooling conductive terminal inner tube 2.09 and the electrode cooling liquid inner tube 4.01 are connected in an interference sleeve joint mode; insulating outer tube 3.03 of liquid cooling generating line 3.06 cup joints respectively in: the liquid cooling conductive terminal 2.01 and the liquid cooling double-channel electrode are fastened by a hoop 5 on the tooth-shaped sealing grooves 2.10 and 4.07.

The following are listed above: one end of the liquid cooling bus 3.06 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 3.06 and the liquid cooling dual-channel electrode 4 are assembled together perfectly to form a complete direct current positive pole or direct current negative pole liquid cooling cable 3 as shown in figure 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 European standard direct current charging socket; the liquid cooling cable 3 contains one end of a liquid cooling double-channel electrode 4 and is arranged outside the shell of the direct current charging socket.

The purpose of liquid cooling is realized, and the cooling liquid is non-conductive liquid media such as purified water, transformer oil and the like; or directly using the cooling system and the coolant for the electric vehicle. 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 electrode cooling liquid enters a cooling liquid inner channel 3.04 of a liquid cooling bus 3.06 through an electrode cooling liquid inner tube 4.01, the cooling liquid passes through a liquid cooling conductive terminal inner tube 2.09 of a liquid cooling conductive terminal 2.01 and directly reaches the bottom of a cavity of the liquid cooling conductive terminal 2.01 in the European standard direct current charging socket, and then the cooling liquid flows back to cool and dissipate the liquid cooling conductive terminal 2.01 in the European standard direct current charging socket; the cooling liquid continuously returns to the cooling liquid outer channel 3.05 of the liquid cooling bus 3.06 in the liquid cooling conductive terminal 2.01; the cooling liquid passes through the soft conductor 3.02 in the cooling liquid outer channel 3.05 to take away the heat generated by the soft conductor 3.02 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 European standard direct current charging socket and the soft lead 3.02 in the liquid cooling bus 3.06, so that the charging current between 300 and 600 amperes can be borne by the charging current without overheating, and the charging socket can work safely and reliably.

Claims

1. The utility model provides a European standard liquid cooling DC charging socket that electric vehicle used, is based on IEC62196-3 charging system standard which characterized in that: a signal wire conductive 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 European standard direct current charging socket, and the shape and position sizes of the liquid cooling conductive terminal meet the requirements of IEC62196-3 charging system standards; the liquid cooling conductive terminal (2.01) is of a cavity structure; the tail part of the liquid cooling conductive terminal (2.01) 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 with a direct current anode and a direct current cathode.

2. The european standard liquid-cooled dc charging receptacle for an electric vehicle of claim 1, wherein: the liquid cooling conductive terminal (2.01) is in a step 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, the other end of the liquid cooling conductive terminal is a lead connecting end (2.06) correspondingly connected with the liquid cooling bus, and a small fixing flange (2.07) which is protruded and used for being connected and positioned with a shell of the direct current charging socket is arranged in the middle of the outer diameter of the cold conductive terminal (2.01); the front end of the liquid cooling conductive terminal (2.01) is provided with a conical insulating sleeve (2.08); the liquid cooling conductive terminal (2.01) is internally provided with a cooling cavity (2.02), the cooling cavity (2.02) comprises a large inner diameter cavity (2.04) and a small inner diameter cavity (2.03), and the large inner diameter cavity (2.04) is communicated with a cooling liquid outer channel (3.05) arranged in the liquid cooling bus through a lead connecting end (2.06); the small inner diameter cavity (2.03) corresponds to the inner part of the closed plug end (2.05), and a liquid cooling conductive terminal inner pipe (2.09) is arranged in the small inner diameter cavity (2.03) and is communicated with a cooling liquid inner channel (3.04) arranged in the liquid cooling bus; a cooling liquid inner channel (3.04) of the liquid cooling bus extends to the end part of the large-inner-diameter cavity (2.04) through the liquid cooling conductive terminal inner tube (2.09); the inner tube (2.09) of the liquid-cooled conductive terminal is a metal hard tube, one end of the inner tube (2.09) of the liquid-cooled conductive terminal is provided with an axial slot-shaped opening or an axial wedge-shaped opening or an end surface inclined plane opening, the end is inserted into the cooling cavity (2.2) of the conductive terminal, and the front end of the inner tube (2.09) of the liquid-cooled conductive terminal is contacted with the closed bottom of the large-inner-diameter cavity (2.04); the outer circular surface of the other end of the inner tube (2.09) of the liquid cooling conductive terminal is provided with a plurality of annular grooves, the end is connected with a cooling liquid inner channel (3.04) of the liquid cooling bus, and the cooling liquid inner channel (3.04) of the liquid cooling bus is communicated with the small inner diameter cavity (2.03); 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. A european standard liquid-cooled dc charging receptacle for an electric vehicle, as defined in claim 2, wherein: the liquid cooling bus comprises an insulating outer sleeve (3.03), a soft lead (3.02) and a polytetrafluoroethylene tube (3.01); a soft lead (3.02) is arranged in the insulating outer sleeve (3.03), a polytetrafluoroethylene tube (3.01) is arranged in the soft lead (3.02), and the soft lead (3.02) is woven on the outer wall of the polytetrafluoroethylene tube (3.01) in layers; the polytetrafluoroethylene tube (3.01) penetrates through the center of the soft lead (3.02), and the inner hole of the polytetrafluoroethylene tube (3.01) is a cooling liquid inner channel (3.04); an annular gap is arranged between the insulating outer sleeve (3.03) and the soft lead (3.02), and the annular gap is a cooling liquid outer channel (3.05) of the liquid cooling bus.

4. A european standard liquid-cooled dc charging receptacle for an electric vehicle as recited in claim 3, wherein: the liquid-cooling double-channel electrode comprises an electrode body, wherein internal threads (4.04) are arranged on the electrode body, and the liquid-cooling double-channel electrode is connected with a coaxial electrode pipeline (4.02) through the internal threads (4.04); the electrode pipeline (4.02) is in threaded connection with an external thread (4.03) of the electrode pipeline, which is in threaded connection with an internal thread (4.04) on the electrode body, and a locking nut (4.05) is arranged at the threaded connection part; 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 electrode pipeline (4.02) is provided with a lead connecting cavity (4.08) communicated with the cooling liquid outer channel (3.05), 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), and quick connectors are connected to the cooling liquid inlet and the cooling liquid outlet; 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 isolating layer is arranged between a cooling liquid inlet (4.09) and a cooling liquid outlet (4.10) in the electrode body, and the center of the isolating layer is provided with an internal thread hole and a through hole; an electrode cooling liquid inner pipe (4.01) is arranged in the electrode body, 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 of an isolating layer in the electrode, and an inlet (4.09) of cooling liquid is communicated with the electrode cooling liquid inner pipe (4.01) after 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 of the electrode cooling liquid inner pipe extends out of a lead connecting cavity (4.08) of the electrode body and is connected with a cooling liquid inner channel of the liquid cooling bus; the inlet (4.09) of the cooling liquid, the inner tube (4.01) of the cooling liquid and the inner channel of the cooling liquid of the liquid cooling bus are communicated; the electrode body is provided with a mounting seat (4.11), and the mounting seat (4.11) is provided with a mounting hole.

5. The european standard liquid-cooled dc charging receptacle for electric vehicles according to claim 4, wherein; the tail part of the liquid cooling conductive terminal (2.01) in the direct current charging socket is connected with a liquid cooling bus; the other end of the liquid cooling bus is connected with the liquid cooling double-channel electrode, a soft lead (3.02) in the liquid cooling bus is respectively connected with a lead connecting end (2.06) of the liquid cooling conductive terminal (2.01) and a lead connecting cavity (4.08) of the liquid cooling double-channel electrode, and the connecting modes are semicircular groove-shaped crimping; the cooling liquid inner channel (3.04) of the liquid cooling bus is respectively connected with the liquid cooling conductive terminal inner tube (2.09) and the electrode cooling liquid inner tube (4.01), and the connection modes are interference sleeve; an insulating outer sleeve (3.03) of the liquid cooling bus is respectively sleeved on the liquid cooling conductive terminal (2.01), the dentiform sealing groove (2.10) of the dentiform liquid cooling double-channel electrode and the dentiform sealing groove (4.07) of the dentiform liquid cooling electrode (4.02), and the fastening modes are locking by a clamp (5).