WO2019184883A1

WO2019184883A1 - Positive and negative liquid-cooling cable serial cooling structure of high-power charging pile

Info

Publication number: WO2019184883A1
Application number: PCT/CN2019/079564
Authority: WO
Inventors: 臧重庆; 臧昊哲; 杨国星; 张艳丽
Original assignee: 洛阳正奇机械有限公司
Priority date: 2018-03-26
Filing date: 2019-03-25
Publication date: 2019-10-03
Also published as: JP2021518736A; JP7075144B2

Abstract

A positive and negative liquid-cooling cable serial cooling structure of a high-power charging pile, comprising a liquid-cooling cable insulation outer cover, and a PE wire and a plurality of signal wires which are provided in the liquid-cooling cable insulation outer cover; a positive liquid-cooling cable and a negative liquid-cooling cable are also provided in the liquid-cooling cable insulation outer cover, each cable is comprised of a soft conductor wire and an insulation casing, the soft conducting wire is provided in the insulation casing, and the gap provided between the soft conducting wire and the insulation casing is a coolant passage; one end of the soft conducting wire is connected to a liquid-cooling terminal of a charging gun, the other end of the soft conducting wire is connected to a liquid-cooling cable electrode, and the liquid-cooling cable electrode is provided with an electrode pipe which is in communication with the coolant passage; and each of the liquid-cooling terminals of the two charging guns is provided with a cooling cavity which is in communication with the corresponding coolant passage, and the two cooling cavities are in communication with each other by means of an insulation connection pipe assembly. The present invention can safely carry a large current and avoid overheating of the cables during the charging operation.

Description

Positive and negative liquid cooling cable series cooling structure of high power charging pile

Technical field

The invention relates to the technical field of high-power charging piles for new energy electric vehicles, in particular to a series cooling structure of positive and negative liquid cooling cables of high-power charging piles.

Background technique

New energy electric vehicles have been rapidly developed due to their lack of exhaust emissions, and fuel vehicles will gradually withdraw from the historical arena. With the disappearance of the fuel car, the accompanying gas station will also complete its historical mission. Instead, it will be a charging station all over the world. The charging station's hardware facilities are charging piles.

At present, the charging station for electric vehicles is basically a medium-power charging pile with a DC voltage of 750 volts and an output current of less than 250 amps. Taking the electric bus charging of an ordinary model as an example, at least three batteries are required to fill the entire vehicle. Hours. The charging efficiency of the medium-power charging pile is not high. The high-power charging pile currently under development has technical parameters: DC charging voltage 1000-1500V, output current 500-600A; if using high-power charging pile charging, electric bus with ordinary models For example, car charging is sufficient. It takes only 15 minutes to fill the battery of the whole car. The charging efficiency of the high-power charging pile is high, which is the mainstream development direction of the charging station in the future.

Obviously, the high-power charging pile power supply is connected to the charging gun cable, which needs to be able to safely carry a cable of 400-600 amps. Because the output current of the medium power charging post is less than 250A, the dry cable used has a cross-sectional area of 70 square millimeters. If it is to carry a current of 400-600 amps, the theoretical cross-sectional area of the dry cable needs to reach 100-150 square millimeters. Only then. In this way, the dry integrated cable connected to the charging power supply and the charging gun has an outer diameter of 52-73 mm, and the cable having such a large outer diameter is not only bulky but also heavy, which is not in compliance with ergonomic requirements. Therefore, the high-power charging pile should be equipped with a special cable with small outer diameter, light weight, large carrying current and self-cooling function.

Summary of the invention

The object of the present invention is to provide a series cooling structure of a positive and negative liquid cooling cable for a high-power charging pile, and an outer diameter of a series cooling structure of a positive and negative liquid cooling cable of a high-power charging pile is less than 40 mm, which is lower than a conventional size; The inner soft conductor has a small cross-sectional area, light weight, and high carrying current; in particular, the technical solution adopts a series cooling scheme to solve the problem of overheating of the high-power charging pile cable.

In order to further disclose the present invention, the technical solution adopted by the present invention is:

A series cooling structure for a positive and negative liquid cooling cable of a high-power charging pile, comprising a liquid-cooled cable insulation outer cover and a plurality of signal wires disposed inside the liquid-cooled cable insulation, wherein the liquid-cooled cable is insulated inside There are two liquid-cooled cables, a positive electrode and a negative electrode. Each liquid-cooled cable is composed of a soft wire and an insulating sleeve. The soft wire is disposed in the insulating sleeve, and the gap between the soft wire and the insulating sleeve is a coolant. aisle.

One end of the soft wire is connected with a liquid cooling terminal of the charging gun, and the other end is connected with a liquid cooling cable electrode, wherein the liquid cooling cable electrode is provided with an electrode pipe connected to the coolant channel; and the liquid and cold wire of the positive electrode and the negative electrode are respectively A cooling cavity communicating with the coolant passage is disposed in the liquid charging terminals of the two charging guns, and the two cooling cavities are communicated through the insulating connecting tube assembly.

In order to further improve the technical solution, the soft conductor comprises a soft copper strand and a protective net, and the soft copper strand is embedded in the interior of the protective net, and an annular coolant passage is disposed between the insulating sleeve and the protective net; The soft copper stranded wire is a stranded strand core, and the stranded strand core is twisted into a small strand by a plurality of small diameter tinned copper single wires, and the plurality of small strands are twisted into one wire; the protection The net is a tubular wire mesh woven from tinned copper wire.

In order to further improve the technical solution, the liquid cold terminal of the charging gun is shaft-shaped, one end is a closed plug end corresponding to the charging socket of the electric vehicle, and the other end is an opening corresponding to the soft wire of the high-power charging pile liquid cooling cable. a connecting end, the cooling cavity communicates with the coolant passage through the open connection end; a protruding positioning member for connecting with the charging gun body is provided in the middle of the outer diameter of the liquid cooling terminal of the charging gun, and the outer diameter of the liquid cooling terminal of the charging gun A protruding through hole communicating with the cooling cavity is disposed between the positioning member and the opening end of the opening, and the two through holes on the two liquid cooling cables of the positive electrode and the negative electrode are communicated through the insulating connecting pipe assembly.

In order to further improve the technical solution, the soft wire is crimped on the inner wall of the cooling cavity on the liquid cooling terminal side of the charging gun, and the insulating sleeve is located at the end of the liquid cold terminal of the charging gun and is sleeved at the opening end. On the outer cylindrical surface, and tightened by the clamp.

In order to further improve the technical solution, a threaded connection port is arranged on the convex end of the through hole, and an internal thread and an external thread are respectively arranged inside and outside the threaded connection port.

In order to further improve the technical solution, the insulated connecting tube assembly comprises an insulating conduit, an insulating lock nut, a horn nut and a sealing ring, and the insulating conduit is a hollow structure, and the hollow portion is connected to a cooling cavity of the liquid cold terminal of the charging gun. An annular groove is arranged on both end faces of the insulating conduit, and a sealing ring is arranged in the annular groove; one end of the insulating conduit is provided with an external thread, and is screwed with the internal thread of the screw connection port of one of the charging guns, and is insulated The nut is locked; the other end of the insulated conduit is provided with an inverted cone structure, and the internal thread of the horn nut is screwed with the external thread of the screw connection port of the other liquid of the charging gun, and the inner tapered surface of the horn nut and the insulating conduit are The inverted cone is pressed tightly.

In order to further improve the technical solution, a through pipe is connected in the through hole, and the bent pipe is located in the cooling cavity and leads to the bottom of the cooling cavity.

In order to further improve the technical solution, the cooling cavities of the liquid-cooling terminals of the two charging guns on the two liquid-cooled cables of the positive and negative electrodes are respectively equipped with a fluid separation body, and the cooling cavity is a cylindrical cavity. The fluid to be described is a circular shaft shape, and a notch sinking table and a sinking table are arranged on both sides of the outer cylindrical surface of the shaft and the axial plane of the shaft, and one of the axial end faces is provided with a connecting sinking groove, and the fluid dividing body has a connecting sinking groove. One end is inserted into the cooling cavity, the two fluid-separating stages are oppositely arranged, and the semi-circular passage formed by the sinking table and the cooling cavity is in communication with the insulating connecting pipe assembly; the notch sunken table and the cooling cavity form a notch channel, the notch channel and The coolant passage is in communication and communicates with the semicircular passage through the connecting sink.

In order to further improve the technical solution, the liquid-cooled cable electrode includes an electrode conduit, and an electrode coolant inlet and outlet and a wire connection port are respectively disposed at two ends of the electrode pipe; and the other end of the soft wire is crimped into the electrode pipe. The end of the insulating sleeve is sleeved on the outer cylindrical surface of the electrode tube and is clamped by the clamp; the coolant passage is connected to the electrode coolant inlet and outlet through the electrode tube, and the electrode coolant is A quick connection for the coolant inlet and outlet is connected to the inlet and outlet.

In order to further improve the technical solution, the liquid-cooled cable electrode is provided with an electrode mount for establishing an electrical connection with the charging post.

Compared with the prior art, the beneficial effects of the present invention are: the positive and negative liquid cooling cables of the high-power charging pile according to the present invention are cooled in series, and the cooling liquid is entered by the liquid-cooled cable electrode of a liquid-cooled cable. It flows through its own soft wire, the liquid of the charging gun liquid, and then flows to the liquid cooling terminal of the charging gun of another cable, the soft wire, the liquid cooling cable electrode, and finally returns to the cooling device for recycling. The circulating cooling liquid can cool and cool the liquid-cooled cable electrode, the soft-wired wire and the liquid-cooled terminal of the charging gun of the positive and negative liquid cooling cables of the high-power charging pile during the charging process.

The positive and negative liquid cooling cable of the high-power charging pile of the invention has a series cooling structure, and the cross-sectional area of each soft conductor is only 35-60 square millimeters, which is smaller than 70 square millimeters of the medium-power charging pile dry cable, and The overall cable outer diameter is only 39 mm, which is the same as the outer diameter of the traditional dry integrated cable. It has the characteristics of low cost, light weight and easy operation. Moreover, the present invention can safely carry a current of 600 amps, ensuring high-power charging use, and avoiding overheating of the cable during charging work.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

2 is a schematic cross-sectional structural view of a cold liquid cold cable of a positive electrode and a negative electrode.

3 is a schematic cross-sectional structural view of a liquid cold terminal of a charging gun.

4 is a schematic cross-sectional view of an insulated connecting tube assembly.

Fig. 5 is a schematic cross-sectional view showing the electrode of the liquid-cooled cable.

Figure 6 is a schematic view of the flow direction of the cooling liquid of the present invention.

Fig. 7 is a schematic view showing the structure of a fluid separation body in the second embodiment of the present invention.

Fig. 8 is a cross-sectional structural view showing the liquid cold terminal side of the positive electrode and the negative electrode charging gun in the second embodiment of the present invention.

In the figure: 1, liquid-cooled cable insulation outer; 2, soft wire; 2.1, coolant channel; 2.2, soft copper strand; 2.3, protective net; 3, insulating sleeve; 4, liquid-cooled cable electrode; Electrode pipe; 4.2, electrode coolant inlet and outlet; 4.3, wire connection port; 4.4, electrode mount; 5, charging gun liquid cold terminal; 5.1, cooling cavity; 5.2, closed plug end; 5.3, open connection end; Positioning member; 5.5, through hole; 5.6, elbow; 5.7, threaded connection; 6, splitting fluid; 6.1, notch sinking; 6.2, sinking; 6.3, connecting sinking groove; 6.4, semicircular channel; Channel; 7, coolant inlet and outlet quick connector; 8, PTFE insulated gasket; 9, insulated connecting tube assembly; 9.1, insulated conduit; 9.2, insulating lock nut; 9.3, sealing ring; 9.4, flare nut ; 9.5, annular groove; 10, signal line; 11, clamp.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Embodiment 1: A series cooling structure of a positive and negative liquid cooling cable of a high-power charging pile, as shown in FIG. 1-2, including a liquid-cooled cable insulation outer cover 1 and a plurality of liquid-cooled cable insulation outer 1 The root signal line 10, the liquid-cooled cable insulation outside is also provided with two liquid-cooled cables of a positive electrode and a negative electrode, each liquid-cooled cable is composed of a soft wire 2 and an insulating sleeve 3, and a positive liquid cooling cable The insulating sleeve 3 is red, the insulating sleeve 3 of the negative liquid cooling cable is black, the soft conductor 2 is disposed in the insulating sleeve 3, and the gap between the soft conductor 2 and the insulating sleeve 3 is the coolant passage 2.1. .

One end of the flexible conductor 2 is connected with a liquid cooling terminal 5 of the charging gun, and the other end is connected with a liquid-cooled cable electrode 4 to establish an electrical connection from the liquid-cooled cable electrode 4 to the liquid-cooling terminal 5 of the charging gun. The soft conductor 2 includes a soft copper strand 2.2 and a protective net 2.3. The soft copper strand 2.2 is embedded in the interior of the protective net 2.3, and an annular coolant channel is disposed between the insulating sleeve 3 and the protective net 2.3. The soft copper strand 2.2 is a stranded strand core, and the stranded strand core is twisted into a small strand by a plurality of small diameter tinned copper single wires, and a plurality of small strands are twisted into one wire; The protective net 2.3 is a tubular mesh wire woven from tinned copper wire. The use of stranded wire strands as the core can greatly increase the flexibility of the cable, and the curvature during bending can be concentrated in one place, but distributed on each strand of wire, the smaller the diameter of each strand of wire, The bending stress generated during bending is smaller, so that plastic deformation does not occur under the allowable bending radius, and the characteristics are good stability, high reliability, and long life. In the present invention, since the soft copper strand 2.2 and the protective net 2.3 are both twisted and woven mesh wires, the coolant can penetrate into the gaps in the wires to maximize contact with the wire surface to dissipate heat.

As shown in FIG. 3, the liquid cold terminal 5 of the charging gun is shaft-shaped, one end is a closed plug end 5.2 corresponding to the electric vehicle charging socket, and the other end is connected with the soft wire 2 of the high-power charging pile liquid cooling cable. The opening end 5.3, the cooling cavity 5.1 communicates with the coolant channel 2.1 through the opening connection end 5.3; a positioning member 5.4 for connecting to the charging gun body is provided in the middle of the outer diameter of the charging gun liquid cooling terminal 5, in the charging gun On the outer diameter of the liquid-cooled terminal 5, between the seal positioning flange 5.4 and the open connection end 5.3, a convex through-port 5.5 communicating with the cooling cavity 5.1 is provided, and two of the positive and negative liquid-cooled cables are provided. The through port (5.5) is connected through the insulated connecting tube assembly (9). In order to facilitate the connection of the through port 5.5 and the insulated connecting tube assembly 9, the through holes 5.5 of the positive and negative liquid cooling terminals are respectively provided with internal threads and external threads.

The soft conductor 2 is crimped on the inner wall of the cooling cavity 5.1 at one end of the liquid cold terminal 5 of the charging gun to establish an electrical connection between the soft conductor 2 and the liquid cold terminal 5 of the charging gun. One end of the insulating sleeve 3 on the side of the liquid-cooling terminal 5 of the charging gun is sleeved on the outer cylindrical surface of the open connection end 5.3, and is hooped by the clamp 11. In order to enhance the sealing property, a Teflon insulating gasket 8 is disposed between the end of the insulating sleeve 3 and the liquid-cooling terminal 5 of the charging gun.

The closed plug end 5.2 acts as a conductive part in contact with the charging socket of the electric vehicle, and usually generates a large amount of heat due to poor contact. In order to cool the closed plug end 5.2 of the liquid cold terminal 5 of the charging gun, the cooling cavity 5.1 extends to the closed plug. Inside the end 5.2, an elbow 5.6 is connected in the through opening 5.5. The elbow 5.6 is located in the cooling cavity 5.1 and leads to the closed plug end 5.2 of the cooling cavity 5.1. The closed plug end 5.2 of the cooling cavity 5.1 communicates with the insulated connecting tube assembly 9 and the coolant channel 2.1 via a bend 5.6. In this way, the coolant can be circulated and dissipated in the cooling cavity 5.1 inside the closed plug end 5.2, since there is no flow dead zone, so that the overheating problem of the closed plug end 5.2 can be better solved.

As shown in FIG. 4, the insulated connecting tube assembly 9 comprises an insulating conduit 9.1, an insulating lock nut 9.2, a horn nut 9.4 and a sealing ring 9.3, and the insulating conduit 9.1 is a hollow structure, and the hollow portion and the charging gun liquid-cooled terminal 5, the cooling cavity 5.1 is connected, the end of the insulating conduit 9.1 is provided with an annular groove 9.5, the annular groove 9.5 is provided with a sealing ring 9.3; one end of the insulating conduit 9.1 is provided with an external thread, and one of the charging gun liquid cooling terminal 5 The internal thread of the threaded connection port 5.7 is screwed and locked by the insulating nut 9.2; the other end of the insulating tube 9.1 is provided with an inverted cone structure, and the internal thread of the horn nut 9.4 is screwed to the liquid cooling terminal 5 of the other charging gun. The external thread of the port 5.7 is screwed, and the inner tapered surface of the horn nut 9.4 is press-fitted with the inverted tapered surface of the insulating conduit 9.1 to form a sealed structure.

As shown in FIG. 5, the liquid-cooled cable electrode 4 includes an electrode conduit 4.1, and an electrode coolant inlet and outlet 4.2 and a wire connection port 4.3 are respectively disposed at two ends of the electrode pipe 4.1; the other end of the soft wire 2 is crimped to the electrode. On the inner tube wall of the pipe 4.1, an electrical connection between the liquid-cooled cable electrode 4 and the soft conductor 2 is established. The end of the insulating sleeve 3 is sleeved on the outer cylindrical surface of the electrode conduit 4.1 and is clamped by the clamp 11; the coolant passage 2.1 communicates with the electrode coolant inlet and outlet 4.2 through the electrode conduit 4.1. In order to enhance the sealing property, a Teflon insulating gasket 8 is disposed between the end of the insulating sleeve 3 and the liquid-cooled cable electrode 4.

In order to facilitate the connection of the electrode coolant inlet and outlet 4.2 to the external cooling system, a coolant inlet and outlet quick connector 7 is connected to the electrode coolant inlet and outlet 4.2.

In order to facilitate the electrical connection between the liquid-cooled cable electrode 4 and the charging post, the liquid-cooled cable electrode 4 is provided with an electrode mount 4.4 for establishing an electrical connection with the charging post.

Working principle: The cooling liquid can be: non-conductive liquid medium such as pure water, transformer oil, transformer silicone oil, fluorinated liquid. Since the positive electrode and the negative electrode are cooled in series, the coolant flows between the positive electrode and the negative electrode, and therefore, the coolant must be a non-conductive liquid medium. Pure water can be used in the normal temperature zone, and cooling oil can be used in the cold zone to prevent the cooling medium from freezing and ensure the normal operation of the cable in different zones.

As shown in Fig. 6, the cooling liquid in the cooling device enters the electrode conduit 4.1 from the coolant inlet and outlet quick connector 7 of the positive liquid cooling cable liquid cooling cable electrode 4, and then enters the positive liquid cooling cable through the coolant channel 2.1. The cooling cavity 5.1 in the gun fluid cold terminal 5 flows into the insulated connecting pipe assembly 9 through the elbow 5.6 at the closed plug end 5.2 of the cooling cavity (5.1); the coolant in the insulated connecting pipe assembly 9 passes through the negative liquid cooling line The elbow 5.6 in the liquid-cooling terminal 5 of the cable charging gun enters the cooling cavity 5.1 of the negative liquid cooling cable, and flows out from the liquid-cooled cable electrode 4 of the negative liquid cooling cable through the cooling liquid passage 2.1 of the negative liquid cooling cable. Returning to the cooling device to form a circulation of the coolant. During the uninterrupted circulation of the coolant, the soft conductor 2, the liquid-cooled cable electrode 4, and the liquid-cooling terminal 5 of the charging gun are cooled, so that the positive and negative serial coolant cooling cables of the high-power charging pile can be safely carried. 400-600 amps of operating current.

Embodiment 2: The positive and negative liquid cooling cable series cooling structure of a high-power charging pile as described in Embodiment 1 is different from Embodiment 1 in the following technical features:

As shown in FIG. 7-8, the two charging gun liquid-cooling terminals 5 on the positive and negative series cooling liquid cooling cables of the high-power charging pile have a fluid dividing body 6 installed in the cooling cavity 5.1, and the cooling is performed. The cavity 5.1 is a cylindrical cavity, and the fluid dividing body 6 is axially shaped. A notch sinking 6.1 and a sinking table 6.2 are symmetrically disposed at an intermediate portion of the outer cylindrical surface of the shaft and on both sides of the shaft, and a shaft end surface is provided with communication. The sinker 6.3, the split fluid 6 has one end connected to the sinker 6.3 inserted in the cooling cavity 5.1, and the countersinks 6.2 of the two partial fluids 6 of the positive and negative liquid cooling terminals are oppositely arranged, the sinking table 6.2 and the cooling air are The semicircular passage 6.4 formed by the cavity 5.1 communicates with the insulated connecting pipe assembly 9; the notch sunken table 6.1 and the cooling cavity 5.1 form a notch passage 6.6, the notch passage 6.5 communicates with the coolant passage 2.1, and communicates with the semicircular passage 6.5 through the communicating sinking groove 6.3 .

The coolant flows into the DC cooling cavity 5.1 from the coolant passage 2.1 of the liquid charging terminal 5 of the positive charging gun, and enters the semicircular passage 6.4 of the liquid cooling terminal 5 of the negative charging gun via the notch passage 6.5, the semicircular passage 6.4, and the insulated connecting pipe assembly 9. Then, through the notch passage 6.5, it flows into the cooling cavity 5.1 of the liquid-cooling terminal 5 of the negative-electrode charging gun to form a flow passage for cooling the cooling liquid in the liquid-cooling terminal 5 of the positive electrode and the negative electrode charging gun. In this way, it is also possible to realize that the coolant can be dissipated and dissipated in the cooling cavity 5.1 inside the closed plug end 5.2. Since there is no circulation dead zone, the overheating problem of the closed plug end 5.2 can be better solved.

While the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art The scope of the invention is defined by the appended claims and their equivalents.

Claims

A series cooling structure of a positive and negative liquid cooling cable for a high-power charging pile, comprising a liquid-cooled cable insulation jacket (1) and a plurality of signal wires (10) disposed in the insulation of the liquid-cooled cable (1), The utility model is characterized in that: the liquid-cooled cable insulation outer cover (1) is further provided with two liquid-cooled cables of a positive electrode and a negative electrode, and each liquid-cooled cable is composed of a soft wire (2) and an insulating sleeve (3). The soft wire (2) is disposed in the insulating sleeve (3), and the gap between the soft wire (2) and the insulating sleeve (3) is a coolant channel (2.1);

One end of the soft wire (2) is connected with a liquid cooling terminal (5) of the charging gun, and the other end is connected with a liquid cooling cable electrode (4), and the liquid cooling cable electrode (4) is provided with an electrode pipe (4.1) and cooling. The liquid passage (2.1) is connected; the two charging gun liquid-cooling terminals (5) on the two liquid-cooled cables of the positive and negative electrodes are provided with a cooling cavity (5.1) communicating with the coolant passage (2.1), The two cooling cavities (5.1) are connected by an insulated connecting tube assembly (9).
The tandem cooling structure for a positive and negative liquid cooling cable of a high-power charging pile according to claim 1, wherein the soft conductor (2) comprises a soft copper strand (2.2) and a protective net (2.3), and the soft copper The stranded wire (2.2) is embedded in the interior of the protective net (2.3), and an annular coolant channel (2.1) is disposed between the insulating sleeve (3) and the protective net (2.3); the soft copper strand ( 2.2) is a stranded strand core, the stranded strand core is twisted into a small strand by a plurality of small-diameter tinned copper single wires, and a plurality of small strands are twisted into a single strand; the protective net (2.3) A tubular wire mesh woven into a tinned copper wire.
The positive and negative liquid cooling cable series cooling structure of the high-power charging pile according to claim 1, wherein the liquid cold terminal (5) of the charging gun is shaft-shaped, and one end is connected with an electric vehicle charging socket. The closed plug end (5.2), the other end is the open connection end (5.3) corresponding to the soft conductor (2) of the high-power charging pile liquid cooling cable, and the cooling cavity (5.1) passes through the open connection end (5.3) and the coolant The passage (2.1) is connected; a protruding positioning member (5.4) for connecting with the charging gun body is provided in the middle of the outer diameter of the liquid cooling terminal (5) of the charging gun, on the outer diameter of the liquid cooling terminal (5) of the charging gun Between the positioning member (5.4) and the open connection end (5.3), there is a through hole (5.5) which communicates with the cooling cavity (5.1), and two through holes on the liquid and cold cables of the positive electrode and the negative electrode. (5.5) Connected through the insulated connecting tube assembly (9).
The positive and negative liquid cooling cable series cooling structure of the high-power charging pile according to claim 3, wherein the soft wire (2) is located at one end of the liquid cold terminal (5) of the charging gun and is crimped to the cooling air. On the inner wall of the cavity (5.1), the end of the insulating sleeve (3) on the liquid-cooling terminal (5) side of the charging gun is sleeved on the outer cylindrical surface of the open connection end (5.3), and passes through the clamp (11). Hoop tight.
The positive and negative liquid cooling cable series cooling structure of the high-power charging pile according to claim 3, characterized in that: the through-port (5.5) has a threaded connection port (5.7) on the convex end, and the threaded connection port (5.7) Internal and external threads are provided inside and outside.
The tandem cooling structure for a positive and negative liquid cooling cable of a high-power charging pile according to claim 5, wherein the insulated connecting tube assembly (9) comprises an insulating conduit (9.1), an insulating lock nut (9.2), The horn nut (9.4) and the sealing ring (9.3) have an insulated conduit (9.1) which is a hollow structure which communicates with the cooling cavity (5.1) of the liquid-cooled terminal (5) of the charging gun, and the insulating conduit (9.1) An annular groove (9.5) is arranged on the end faces of both ends, and a sealing ring (9.3) is arranged in the annular groove (9.5); one end of the insulating conduit (9.1) is provided with an external thread, and one of the charging guns is liquid-cooled (5) threaded The internal thread of the joint (5.7) is screwed and locked by an insulating nut (9.2); the other end of the insulated conduit (9.1) is provided with an inverted cone structure, through the internal thread of the horn nut (9.4) and another charging gun The external thread of the screw connection (5) of the liquid-cooled terminal (5) is screwed, and the inner tapered surface of the horn nut (9.4) is pressed tightly with the inverted tapered surface of the insulated conduit (9.1).
The tandem cooling structure for a positive and negative liquid cooling cable of a high-power charging pile according to any one of claims 3-6, characterized in that: the through hole (5.5) is connected with an elbow (5.6), and the elbow is connected (5.6) Located in the cooling cavity (5.1) and leading to the bottom of the cooling cavity (5.1).
A series cooling structure for a positive and negative liquid cooling cable of a high-power charging pile according to any one of claims 3-6, characterized in that: two charging guns on the two liquid-cooled cables of the positive and negative electrodes are liquid-cooled A fluid dividing body (6) is mounted in the cooling cavity (5.1) of the terminal (5), the cooling cavity (5.1) is a cylindrical cavity, and the fluid dividing body (6) is a circular shaft shape on the shaft The middle part of the outer cylindrical surface and the plane of the shaft plane are provided with a notch sinking platform (6.1) and a sinking table (6.2), and a shaft end surface is provided with a connecting sinking groove (6.3), and the fluid dividing body (6) has a connecting sinking groove. One end of (6.3) is inserted into the cooling cavity (5.1), the two stages (6.2) of the partial fluid (6) are oppositely arranged, and the semicircular passage formed by the sinking table (6.2) and the cooling cavity (5.1) (6.4) ) communicating with the insulated connecting pipe assembly (9); the notch sinking table (6.1) and the cooling cavity (5.1) forming a notch passage (6.6), the notch passage (6.5) is in communication with the coolant passage (2.1), and the through-groove is connected (6.3) Connected to the semicircular channel (6.5).
The positive and negative liquid cooling cable series cooling structure of the high-power charging pile according to claim 1, wherein the liquid-cooled cable electrode (4) comprises an electrode pipe (4.1), and two of the electrode pipes (4.1) The ends are respectively provided with an electrode coolant inlet and outlet (4.2) and a wire connection port (4.3); the other end of the soft wire (2) is crimped onto the inner pipe wall of the electrode pipe (4.1), the insulating sleeve ( The end of 3) is sleeved on the outer cylindrical surface of the electrode tube (4.1) and clamped by the clamp (11); the coolant channel (2.1) passes through the electrode tube (4.1) and the electrode coolant inlet and outlet ( 4.2) Connect, connect the coolant inlet and outlet quick connector (7) to the electrode coolant inlet and outlet (4.2).
The positive and negative liquid cooling cable series cooling structure of the high-power charging pile according to claim 1, wherein the liquid-cooled cable electrode (4) is provided with an electrode mounting seat for establishing an electrical connection with the charging post ( 4.4).