CN220764099U

CN220764099U - Charging gun and charging pile

Info

Publication number: CN220764099U
Application number: CN202322058593.4U
Authority: CN
Inventors: 任俊衡
Original assignee: Huawei Digital Power Technologies Co Ltd
Current assignee: Huawei Digital Power Technologies Co Ltd
Priority date: 2023-08-01
Filing date: 2023-08-01
Publication date: 2024-04-12
Anticipated expiration: 2033-08-01

Abstract

The application provides a rifle and stake of charging. The rifle that charges includes cooling tank, charging terminal, liquid cooling tube and fixing device. The cooling tank is used for cooling the charging terminal. The charging terminal comprises a cable connecting end and a charging interface end, wherein the cable connecting end is used for connecting a power cable, and the charging interface end is used for connecting a charging socket of an electric vehicle. The liquid cooling pipe is communicated with the cooling pool, and the fixing device is used for enabling the liquid cooling pipe to be fixedly contacted with the cable connecting end of the charging terminal.

Description

Charging gun and charging pile

Technical Field

The application relates to the technical field of new energy, in particular to a charging gun and a charging pile.

Background

As the charging power of the electric vehicle increases, the current capacity of the charging gun gradually increases. In order to solve the heat dissipation problem of the charging gun, the industry generally adopts a liquid cooling charging gun. In the process of connecting the liquid cooling cable into the charging gun, as the power cable needs to be connected with the charging terminal, the liquid cooling pipe needs to be communicated with the cooling tank of the charging gun, so that the liquid cooling cable needs to be separated, and the power cable is separated from the liquid cooling pipe.

Disclosure of Invention

The utility model provides a rifle and electric pile charge can reduce the separated time length of liquid cold tube and power cable, and then improves the heat dispersion of rifle charges.

In a first aspect, embodiments of the present application provide a charging gun that includes a cooling pool, a charging terminal, a liquid cooled tube, and a fixture. The cooling pond is used for cooling the charging terminal, and the charging terminal includes cable link and interface end that charges, and the cable link is used for connecting power cable, and the interface end that charges is used for connecting the direct current interface that charges of the socket that charges of electric vehicle. The liquid cooling pipe is communicated with the cooling pool, and the fixing device is used for enabling the liquid cooling pipe to be in contact with the cable connecting end of the charging terminal.

When the power cable is connected with the cable connecting end of the charging terminal and the liquid cooling pipe is connected with the cooling pool, the power cable and the liquid cooling pipe can be separated into segments, and the power cable positioned in the separated segments cannot be attached to the liquid cooling pipe to dissipate heat. When being connected the cable link of power cable and charging terminal, in order to prevent that the liquid cooling pipe from stretching into behind the cable link because there is not fixed stay and producing the influence to the connection process, can bend the both sides of liquid cooling pipe to charging terminal to the convenience is connected power cable and cable link. In order to ensure that the angles at which the liquid-cooled tubes can be bent along the two sides of the charging terminal are larger, the length of the liquid-cooled tubes in the line segments is longer, that is, the length of the liquid-cooled tubes, which is not attached to the power cable, is longer, so that the heat dissipation capacity of the charging gun is reduced.

And in this application, the rifle that charges includes fixing device, fixing device can make the cable link fixed contact of liquid cold pipe and charging terminal, can avoid the liquid cooling pipe to influence the connection between power cable and the cable link to do not need to bend the both sides of liquid cold pipe to charging terminal. Therefore, the length of the liquid cooling pipe in the line dividing section can be reduced, the attaching length of the liquid cooling pipe and the power cable can be increased, and the heat dissipation capacity of the charging gun can be improved.

In one possible embodiment, the fixing device is integrally formed with the cable connection end of the charging terminal, and the fixing device is arranged in a stacked manner with the cable connection end along the first direction. The fixing device comprises a through hole, and the through hole penetrates through the fixing device along the second direction. The liquid cooling pipe penetrates through the through hole along the second direction to be communicated with the cooling pool, wherein the first direction is perpendicular to the second direction. The liquid cooling pipe passes through the through hole of the fixing device and is connected with the cooling tank, and the fixing device and the cable connecting end of the charging terminal are integrally formed, so that heat of the cable connecting end can be transmitted to the liquid cooling pipe through the fixing device, the liquid cooling pipe dissipates heat for the cable connecting end, and the heat dissipation capacity of the charging gun is improved. The liquid cooling pipe can be better fixed based on the setting mode of the through hole, and the liquid cooling pipe can be more comprehensively contacted with the fixing device, so that the heat radiation capacity of the charging gun is improved.

In one possible embodiment, the cooling tank includes a liquid cooling interface for communicating the cooling tank with the liquid cooling tube. The aperture of the through hole is larger than or equal to the outer diameter of the liquid cooling pipe, and the aperture of the liquid cooling interface is smaller than or equal to the inner diameter of the liquid cooling pipe. Based on such setting mode, make things convenient for the liquid cold pipe to pass from the through-hole, can prevent moreover that the diameter because the through-hole is too little makes the liquid cold pipe receive the extrusion to the protection liquid cold pipe is not damaged. And can make liquid cooling pipe and cooling tank sealing connection, prevent the coolant liquid in the cooling tank from leaking.

In one possible embodiment, the projection of the liquid cooling interface in the second direction overlaps at least partially with the projection of the through hole, and the projection of the liquid cooling tube in the first direction overlaps with the projection of the cable connection end. Based on the setting mode, the distance from the liquid cooling pipe to the cooling tank is shorter, so that the processing is convenient, the length of the liquid cooling pipe can be reduced, and materials are saved.

In one possible embodiment, the projection shape of the charging interface end is circular and the projection shape of the integrally formed fixing device and the cable connection end is square along the second direction. The charging interface end is cylindrical, so that the charging interface end is convenient to plug with a charging socket of an electric vehicle. The fixing device and the cable connecting end which are integrally formed are arranged into a square body, such as a cuboid or a square body, so that through holes are conveniently formed in two surfaces of the square body, which are oppositely arranged, and the power cable is conveniently welded on one surface of the square body.

In one possible embodiment, the fixing device is integrally formed with the cable connection end of the charging terminal, and the fixing device is arranged in a stacked manner with the cable connection end along the first direction. The fixing device comprises a groove, and the groove penetrates through the fixing device along the second direction. And the liquid cooling pipe penetrates through the groove along the second direction to be communicated with the cooling tank. Based on such setting mode, can make the heat of cable link pass through fixing device and transmit the liquid cold pipe, make the liquid cold pipe dispel the heat for the cable link, improved the heat dispersion of rifle that charges.

In one possible embodiment, the projection of the groove along the second direction at least partially overlaps the projection of the liquid cooling interface. The projection of the liquid-cooled tube along the first direction overlaps the projection of the cable connection end. Based on the setting mode, the distance from the liquid cooling pipe to the cooling tank is shorter, so that the processing is convenient, the length of the liquid cooling pipe can be reduced, and materials are saved.

In one possible embodiment, the projection shape of the groove along the second direction is "U-shaped". The U-shaped groove is higher in fitting degree with the liquid cooling pipe, so that the heat radiation capacity of the charging gun can be improved.

In one possible embodiment, the projection of the liquid cooled interface in the second direction overlaps at least partially with the projection of the groove, and the projection of the liquid cooled tube in the first direction overlaps with the projection of the cable connection. Through such setting mode, can make the liquid cooling pipe pass behind the recess, distance to between the liquid cooling interface is shorter, not only convenient processing, can reduce the length of liquid cooling pipe moreover, save material.

In one possible embodiment, the charging terminal includes a recess for accommodating the cooling bath. The concave part comprises two side walls, one side wall is close to the cable connecting end along the second direction, and the other side wall is close to the charging interface end along the second direction. The height of one sidewall is greater than the height of the other sidewall in the first direction. Based on the arrangement mode, when the through hole or the groove is arranged on one side wall, the projection of the groove or the through hole in the second direction and the projection of the liquid cooling interface in the second direction are at least partially overlapped.

In one possible embodiment, the cooling cells are arranged between the two side walls in the second direction, the length of the cooling cells is smaller than the distance between the two side walls in the second direction, and the height of the cooling cells is smaller than or equal to the height of one side wall in the first direction. That is, the fixing device and the cable connection end of the integrated into one piece form a side wall, and a gap exists between the surface of the cooling tank provided with the liquid cooling interface along the second direction and the side wall, so that the sealing component for sealing the liquid cooling interface is conveniently arranged outside the liquid cooling interface. And the height of the cooling pool is smaller than or equal to the height of one side wall along the first direction, so that the volume of the charging gun can be reduced.

In one possible embodiment, the cable connection end comprises a weld for welding the power cable, the weld being arranged opposite the fixture along the first direction. That is, the welding portion is one of the surfaces of the cable connection end in the first direction, and the power cable is welded to one of the surfaces, so that the power output from the charging pile is transmitted to the charging terminal, thereby charging the vehicle.

In one possible embodiment, the charging gun includes two charging terminals arranged at intervals along a third direction, and the third direction is perpendicular to the first direction and the second direction. The cooling pools are stacked on the two charging terminals along the first direction, and the width of the cooling pools is larger than the gap between the two charging terminals along the third direction. The two charging terminals share one cooling pool, so that the number of the cooling pools can be reduced, and the weight and the volume of the charging gun can be reduced.

In one possible embodiment, the charging gun includes two liquid cooling tubes spaced apart along the third direction. The two liquid cooling pipes are respectively laminated at the cable connecting ends of the two charging terminals along the first direction. Each liquid cooling pipe penetrates through a through hole or a groove of one fixing device to be connected with a corresponding liquid cooling interface, so that the two liquid cooling pipes are communicated with one cooling pool.

In one possible embodiment, the charging gun further comprises a header pipe, and the cooling bath comprises a header interface. The collecting pipe is used for communicating the cooling pool through the collecting interface. The bus interface is arranged between the two liquid cooling interfaces along the third direction. The bus duct is arranged between the two charging terminals in the third direction.

In order to insulate the two charging terminals, a gap is provided between the two charging terminals. Accordingly, the collecting pipe may be disposed in a gap between the two charging terminals and communicate with the cooling tank. The arrangement mode can fully utilize the space in the charging gun, improve the space utilization rate and reduce the volume of the charging gun.

In one possible embodiment, the charging gun further comprises two connection terminals, each of which is electrically connected to one of the charging terminals by a power cable. Each connecting terminal comprises a liquid cooling pipe fixing through hole and a wire connecting through hole. The liquid cooling pipe fixing through hole of each connecting terminal is used for penetrating the liquid cooling pipe corresponding to one charging terminal which is electrically connected with the liquid cooling pipe. The wire connection through hole of each wiring terminal is used for electrically connecting one power copper bar of the charging pile through a wire. The wire fixing hole is used for fixing a wire, one end of the wire is electrically connected with the wiring terminal, and the other end of the wire is connected with the power copper bar of the charging pile. Through the arrangement mode, the current collected on the power copper bar is transmitted to the power cable through the lead and the connecting terminal and then is transmitted to the charging terminal, so that the electric vehicle is charged. The wire with a larger diameter can be selected, so that the heat consumption of the wire can be reduced, and the heat dissipation capacity of the charging gun can be improved.

In one possible embodiment, the penetrating direction of the wire connecting through hole is perpendicular to the penetrating direction of the liquid cooling tube fixing through hole. The wire can be conveniently connected with the wire fixing hole based on the arrangement.

In a second aspect, the present embodiments provide a charging pile comprising a heat exchanger, a liquid cooling tank, a water pump and a charging gun as provided in the first aspect and any one of the possible embodiments of the first aspect. Wherein, the cooling pond is linked together with at least one in heat exchanger and the cold liquid case through the liquid cold pipe. The cold liquid box is used for holding cooling liquid, and the heat exchanger is used for receiving the cooling liquid that the cooling pond passes through the transmission of liquid cold pipe, and the water pump is used for driving the cooling liquid and flows between liquid cooling pipe, heat exchanger and cold liquid box.

Drawings

Fig. 1 is a schematic structural diagram of a charging pile according to an embodiment of the present disclosure;

FIG. 2A is a schematic diagram of the internal structure of a prior art liquid-cooled charging gun;

FIG. 2B is a schematic diagram of the connection of the power cable and the cable connection end in FIG. 2A;

fig. 3 is a schematic diagram of an internal structure of a liquid-cooled charging gun according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a mounting apparatus for the liquid-cooled charging gun of FIG. 3;

FIG. 5 is a schematic view of another configuration of the fixture of the liquid-cooled charging gun of FIG. 3;

FIG. 6 is a schematic cross-sectional view of a liquid-cooled cable of the liquid-cooled charging gun of FIG. 3;

FIG. 7 is a schematic diagram of an end of the liquid-cooled cable of the liquid-cooled charging gun of FIG. 3 remote from the charging terminal;

FIG. 8 is a schematic view of the wire connecting through hole and wire connection of the terminal of FIG. 7;

fig. 9 is a schematic structural diagram of a charging pile according to an embodiment of the present application.

Detailed Description

For ease of understanding, the terms involved in the embodiments of the present application are explained first.

And (3) connection: it is to be understood in a broad sense that, for example, a is linked to B either directly or indirectly via an intermediary.

The terms "first," "second," and the like in the description are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature.

Fig. 1 is a schematic structural diagram of a charging pile according to an embodiment of the present application. The charging gun 101 is a device for transmitting electric power between the charging pile 10 and the electric vehicle. The charging gun 101 comprises a charging gun head 103 and a charging gun cable 105. The charging gun head 103 is used for being connected with an electric vehicle, and the charging gun cable 105 is used for being connected with a power module in the charging pile 10, so that the current output by the charging pile 10 can be transmitted to the vehicle, and the vehicle is charged. Increasing the output current of the charging gun 101 can realize high-power charging, so that the charging duration of the electric vehicle can be reduced. However, the heat generated by the charging gun 101 is serious due to the increase of the charging current, and the liquid cooling technology is generally used to dissipate heat of the charging gun 101 so as to achieve the purpose of reducing the heat consumption of the charging gun.

Fig. 2A is a schematic diagram illustrating an internal structure of a liquid-cooled charging gun according to the prior art. The liquid-cooled charging gun 20 includes a charging terminal 201, a cooling tank 203, and a liquid-cooled tube 205. Charging terminal 201 includes charging interface end and 201-1 and cable connection end 201-3. The charging interface terminal 201-1 is used for connecting to a direct current charging interface of a charging socket of an electric vehicle, and the cable connection terminal 201-3 is used for connecting to a power cable 207. The cooling tank 203 is used to dissipate heat for the charging terminal 201. The power cable 207 within the protective sheath 209 circumferentially encases the liquid cooled tube 205. The liquid cooling pipe 205 communicates with the cooling tank 203 so that the cooling liquid can flow in the liquid cooling pipe 205 and the cooling tank 203. In this way, the cooling tank 203 can radiate heat to the charging terminal 201, and the liquid cooling pipe 203 radiates heat to the power cable 207. However, since the liquid cooling pipe 205 needs to communicate with the cooling tank 203, the power cable 207 needs to be connected to the cable connection end 201-3 of the charging terminal, which may cause the liquid cooling pipe 205 and the power cable 207 to fail to be attached in the branching section. The power cable 207 located in the branch line cannot radiate heat through the liquid cooling pipe 205, so that heat of the power cable 207 in the branch line cannot be effectively radiated, and heat generation is serious.

Fig. 2B is a schematic diagram of the connection of the power cable 207 and the cable connection terminal 201-3 in fig. 2A. The power cable 207 and the liquid cooling tube 205 are separated from the wire stripping position, so that the power cable 207 and the cable connecting end 201-3 can be conveniently welded later. In order to prevent the liquid cooling tube 205 from affecting the welding during the welding, the liquid cooling tube 205 is bent towards both sides of the charging terminal 201 (i.e. along the third direction Y), so that the projection of the liquid cooling tube 205 along the first direction Z is not overlapped with the projection of the cable connection end 201-3 of the charging terminal 201 along the first direction Z, thereby facilitating the welding of the power cable 207 and the cable connection end 201-3. In order to ensure that the angle at which the liquid cooling tube 205 is bent is large, the length of the liquid cooling tube 205 in the split line is set long. That is, the length of the liquid cooling tube 205 not attached to the power cable 207 is long, and thus the heat of the power cable 207 in the split line cannot be effectively dissipated, and the heat generation is serious. In other words, since the liquid cooling tube 205 is not fixedly supported, the welding of the power cable 207 and the cable connection end 201-3 is affected, the length of the liquid cooling tube 205 in the split line needs to be set longer, so that the angle of bending the liquid cooling tube 205 along the third direction Y is ensured to be larger, and the welding of the power cable 207 and the cable connection end 201-3 is not affected by the liquid cooling tube 205.

Based on this, as shown in fig. 3, a schematic structural diagram of a liquid-cooled charging gun according to an embodiment of the present application is provided. The liquid-cooled charging gun 30 provided in the embodiment of the present application includes a charging terminal 301, a cooling tank 303, a liquid-cooled tube 305, and a fixing device 307. The cooling cells 303 are arranged in a stacked manner with the charging terminals 301 in the first direction Z, and the cooling cells 303 are used to cool the charging terminals 301. The charging terminal 301 includes a charging interface terminal 301-1 and a cable connection terminal 301-3, the cable connection terminal 301-3 being for connecting a power cable 309, the charging interface terminal 301-1 being for connecting a direct current charging interface of a charging socket of an electric vehicle. The cable connection end 301-3 and the charging interface end 301-1 are arranged opposite to each other along the second direction X, and the second direction X is perpendicular to the first direction Z. The liquid cooling tube 305 communicates with the cooling tank 303, and the fixing device 307 is used to fix the liquid cooling tube 305 in contact with the cable connection end 301-3 of the charging terminal 301.

By such arrangement, the fixing device 307 can fix and contact the liquid cooling tube 305 with the cable connection end 301-3 of the charging terminal 301, so that the liquid cooling tube 305 can be prevented from affecting the welding between the power cable 309 and the cable connection end 301-3, and the liquid cooling tube 305 does not need to be bent towards the two sides of the charging terminal 301, therefore, the length of the liquid cooling tube 305 in the line dividing section can be reduced, the bonding length of the liquid cooling tube 305 and the power cable 309 can be increased, and the heat dissipation capability of the charging gun 30 can be improved. The cable connection terminal 301-3 is connected to the power cable 309, so that the heat dissipation capability of the charging gun 30 can be further improved by allowing the liquid cooling tube 305 to dissipate heat between the cable connection terminal 301-3 and the power cable 309 connected to the cable connection terminal 301-3.

As shown in fig. 4, a schematic structural view of the fixing device 307 in fig. 3 is shown. The fixing device 307 is integrally formed with the cable connection end 301-3 of the charging terminal 301. The fixture 307 is arranged in a stacked relationship with the cable attachment 301-3 along the first direction Z. The fixing means 307 comprises a through hole which extends through the fixing means 307 in the second direction X. The liquid-cooled tube 305 communicates with the cooling pool 303 through the through-hole in the second direction X.

By such arrangement, the current transmitted from the power cable 309 is transmitted to the charging-side interface terminal 301-1 through the cable connection terminal 301-3, so that charging of the electric vehicle can be realized. The liquid cooling tube 305 contacts with the through hole of the fixing device 307, so that heat of the cable connecting end 301-3 can be transmitted to the liquid cooling tube 305, the liquid cooling tube 305 dissipates heat of the cable connecting end 301-3, and the heat dissipation capacity of the charging gun 30 is improved. The liquid cooling pipe 305 can be more firmly fixed by the arrangement mode based on the through holes, and the liquid cooling pipe 305 can be more comprehensively contacted with the fixing device 307, so that the heat dissipation capacity of the charging gun 30 is improved.

In one possible embodiment, cooling tank 303 includes a liquid cooling interface 303-1, and liquid cooling interface 303-1 is used to communicate cooling tank 303 with liquid cooling tube 305. The aperture of the through hole of the fixing device 307 is larger than or equal to the outer diameter of the liquid cooling tube 305, and the aperture of the liquid cooling interface 303-1 is smaller than or equal to the outer diameter of the liquid cooling tube 305.

The aperture of the through hole of the fixing device 307 is larger than or equal to the outer diameter of the liquid-cooled tube 305, not only facilitating the liquid-cooled tube 305 to pass through the through hole of the fixing device 307, but also preventing the liquid-cooled tube 305 from being extruded because the diameter of the through hole is too small, thereby protecting the liquid-cooled tube 305 from being damaged. The aperture of the liquid cooling interface 303-1 is smaller than or equal to the outer diameter of the liquid cooling pipe 305, so that the liquid cooling interface 303-1 and the liquid cooling pipe 305 can be connected in a sealing manner, thereby preventing the cooling liquid in the cooling tank 303 from leaking through the liquid cooling interface 303-1.

It should be noted that a sealing member, such as a gasket, a sealant, etc., may be provided at the connection portion between the liquid cooling interface 303-1 and the liquid cooling pipe 305, so as to improve the sealing property between the liquid cooling interface 303-1 and the liquid cooling pipe 305.

In one possible embodiment, the projection of the liquid cooling interface 303-1 along the second direction X at least partially overlaps the projection of the through hole of the fixture 307. The projection of the liquid cooling tube 305 along the first direction Z overlaps the projection of the cable connector 301-3.

By the arrangement mode, the distance from the liquid cooling pipe 305 to the liquid cooling interface 303-1 after passing through the through hole is short, so that the processing is convenient, the length of the liquid cooling pipe 305 can be reduced, and materials are saved.

When the projection of the liquid cooling interface 303-1 and the projection of the through hole of the fixing device 307 are completely overlapped along the second direction X, the distance from the liquid cooling tube 305 to the liquid cooling interface 303-1 is shortest after passing through the through hole.

In one possible embodiment, the projected shape of the charging interface 301-1 is circular and the projected shape of the integrally formed fixture 307 and cable attachment 301-3 is square along the second direction X.

The charging interface 301-1 is cylindrical, so that the charging interface 301-1 is convenient to plug into a charging socket of an electric vehicle. The cable connection terminal 301-3 is configured as a square body, such as a cuboid or a square body, so that not only is it convenient to provide through holes on two surfaces of the square body that are oppositely disposed, but also it is convenient to weld the power cable 309 to one of the surfaces of the square body.

Fig. 5 shows another structure of the fixing device in fig. 3. The fixing device 307 is integrally formed with the cable connection end 301-3 of the charging terminal 301. The fixture 307 is arranged in a stacked relationship with the cable attachment 301-3 along the first direction Z. Unlike fig. 4, the fixture 307 comprises a recess that extends through the fixture 307 in the second direction X. The liquid-cooled tube 305 communicates with the cooling pool 303 through the groove in the second direction X.

By such arrangement, the current transmitted from the power cable 305 is transmitted to the charging-side interface terminal 301-1 through the cable connection terminal 301-3, so that charging of the electric vehicle can be realized. The liquid cooling tube 305 contacts with the groove of the fixing device 307, so that heat of the cable connecting end 301-3 can be transferred to the liquid cooling tube 305, the liquid cooling tube 305 dissipates heat of the cable connecting end 301-3, and the heat dissipation capacity of the charging gun 30 is improved.

In a possible embodiment, the projection shape of the groove along the second direction X is "U-shaped". The "U-shaped" groove has a higher degree of fit with the liquid cooling tube 305, thereby improving the heat dissipation capability of the charging gun 30. The embodiment of the present application does not limit the specific shape of the groove, and the drawings are only examples.

In one possible embodiment, the projection of liquid-cooled interface 303-1 in the second direction X overlaps at least partially the projection of the groove, and the projection of liquid-cooled tube 305 in the first direction Z overlaps the projection of cable connector 301-3. By the arrangement mode, the distance from the liquid cooling pipe 305 to the liquid cooling interface 303-1 passing through the groove is short, so that the processing is convenient, the length of the liquid cooling pipe 305 can be reduced, and materials are saved.

Referring to fig. 4 and 5 together, in one possible embodiment, the charging terminal 301 further includes a recess 301-5, and the recess 301-5 is configured to accommodate the cooling pool 303. The recess 301-5 includes two sidewalls 301-7 and 301-9. The side wall 301-9 is adjacent to the cable connection end 301-3 along the second direction X, and the side wall 301-7 is adjacent to the charging interface end 301-1 along the second direction X. The height of the side walls 301-9 is greater than the height of the side walls 301-7 in the first direction Z.

The recess 301-5 is rectangular in cross-section parallel to the second direction X and the third direction Y, i.e., the surface of the recess 301-5 for contact with the cooling pool is rectangular in shape. By such arrangement, not only the recess 301-5 can more stably carry the cooling pool 303, but also the contact area between the cooling pool 303 and the recess 301-5 of the charging terminal 301 can be increased, so that the ability of the cooling pool 303 to dissipate heat for the charging terminal 301 can be improved.

It should be noted that, the heat conducting material 311 may be disposed between the surface of the concave portion 301-5 for carrying the cooling pool 303 and the cooling pool, and the heat conductivity of the heat conducting material is higher, so that the heat of the charging terminal may be better transferred to the cooling pool 303, and the heat dissipation capability of the charging gun 30 is improved. For example: the heat conductive material may be a ceramic sheet coated with silicone grease or a ceramic sheet coated with heat conductive gel, etc., and the embodiment of the present application does not limit the type of the heat conductive material.

In one possible embodiment, cooling cells 303 are arranged between the two side walls 301-7 and 301-9 along the second direction X. The length of the cooling pond 303 in the second direction X is smaller than the spacing between the two side walls 301-7 and 301-9. The height of the cooling pool 303 is less than or equal to the height of the side walls 301-9 in the first direction Z. That is, the integrally formed fixing device 307 forms the side wall 301-9 with the cable connection end 301-3, and a gap exists between the surface of the cooling bath 303 provided with the liquid cooling port 303-1 and the side wall 301-9 along the second direction X, thereby facilitating the provision of a sealing member for sealing the liquid cooling port 303-1 outside the liquid cooling port 303-1. And the height of the cooling pool 303 is less than or equal to the height of the side wall 301-9 in the first direction Z, the volume of the charging gun 30 can be reduced.

In one possible embodiment, the cable connection end 301-3 includes a weld 301-11, the weld 301-11 being used to weld the power cable 309. The welded portions 301-11 are arranged opposite the fixture 307 in the first direction Z. The welding portion 301-11 is one of the surfaces of the cable connection end 301-3 in the first direction Z, and the power cable 309 is welded to one of the surfaces, so that the power output from the charging pile is transmitted to the charging terminal 301, thereby charging the vehicle.

In one possible embodiment, the liquid-cooled charging gun 30 includes two charging terminals 301, and the two charging terminals 301 are arranged at intervals along a third direction Y, which is perpendicular to the first direction Z and the second direction X. Cooling cells 303 are stacked on the two charging terminals 301 in the first direction Z. The width of the cooling pool 303 in the third direction Y is larger than the gap between the two charging terminals 301. By such arrangement, the two charging terminals 301 share one cooling pool 303, the number of cooling pools 303 can be reduced, and the weight and volume of the charging gun 30 can be reduced.

The two charging terminals 301 are DC charging terminals, that is, the two charging terminals 301 are dc+ and DC-charging terminals, respectively. The dc+ charging terminal of the charging gun 30 is for connection with the dc+ interface of the charging socket of the electric vehicle, and the DC-charging terminal of the charging gun 30 is for connection with the DC-interface of the charging socket of the electric vehicle, thereby forming a charging loop for charging the electric vehicle.

In one possible embodiment, liquid-cooled charging gun 30 includes two liquid-cooled tubes 305. Two liquid cooling tubes 305 are spaced apart along the third direction Y. Two liquid cooling tubes 305 are stacked on the cable connection ends 301-3 of the two charging terminals 301, respectively, in the first direction Z. Each liquid cooling tube 305 is connected to a corresponding liquid cooling port 303-1 through a through hole or a groove of one of the fixing devices 307, thereby achieving communication between two liquid cooling tubes 305 and one cooling tank 303.

When liquid-cooled charging gun 30 includes two liquid-cooled tubes 305, one of liquid-cooled tubes 305 may be a water inlet tube and the other liquid-cooled tube 305 may be a water outlet tube. The cooling liquid with a lower temperature flows into the cooling tank through the water inlet pipe, and the cooling tank 303 is used for cooling the charging terminal 301. The cooling liquid with higher temperature flows out of the cooling pool through the water outlet pipe. The coolant in the water inlet pipe and the water outlet pipe continuously flows, thereby realizing heat dissipation for the charging terminal 301.

In one possible embodiment, the liquid-cooled charging gun 30 further includes a manifold 313, and the cooling bath 303 further includes a manifold interface 303-3. The manifold 313 is used to communicate with the cooling pool 303 through a manifold interface 303-3. The confluence interfaces 303-3 are arranged between the two liquid-cooled interfaces 303-1 in the third direction Y. The third direction Y manifold 313 is arranged between the two charging terminals 301.

In order to insulate the two charging terminals 301, a gap is provided between the two charging terminals 301. Accordingly, the manifold 313 may be disposed in a gap between the two charging terminals 301 and communicate with the cooling pool 303. The arrangement can fully utilize the space in the charging gun 30, improve the space utilization rate and reduce the volume of the charging gun 30.

When the charging gun 30 includes the header 313 and two liquid-cooled pipes 305, the cooling liquid of a lower temperature flows from the header 313 into the cooling tank 303, and the cooling tank 303 is used to cool the charging terminal 301. Both liquid cooling pipes 305 are water outlet pipes, and the cooling liquid with higher temperature flows out of the cooling pool from the two liquid cooling pipes 305. The cooling liquid in the header pipe and the two water outlet pipes continuously flows, thereby realizing heat dissipation for the charging terminal 301.

Fig. 6 is a schematic cross-sectional view of a liquid-cooled cable of the liquid-cooled charging gun 30 of fig. 3. The power cable 309 encloses the liquid-cooled tube 305, thereby allowing the liquid-cooled tube 305 to dissipate heat from the power cable 309. The power cable 309 is coated with an insulating layer 315. The liquid cooled cable also includes a communication cable 319, an auxiliary power supply cable 321, and a ground wire 323. The outer protective jacket 317 circumferentially surrounds the power cable 309, the communication cable 319, the auxiliary power supply cable 321, and the ground wire 323.

In one possible embodiment, the inner surfaces of the outer protective sheath 317 facing the power cable 309 and the communication cable 319 may also be provided with a temperature equalizing layer to evenly distribute heat inside the outer protective sheath 317 and reduce temperature differences at the outer protective sheath 317 skin. For example: the temperature equalizing layer may be aluminum foil that is wound around the inner surface of the outer protective sheath 317 facing the power cable 309 and the communication cable 319 to achieve temperature equalization.

Fig. 7 is a schematic diagram of a structure of an end of the liquid cooling cable of the liquid cooling charging gun of fig. 3, which is away from the charging terminal. That is, fig. 7 is a schematic diagram of the liquid cooling cable of the liquid cooling charging gun extending into the pile body of the charging pile. The liquid-cooled cable of the liquid-cooled charging gun that extends into the interior of the pile body of the charging pile also includes two terminals 325, the terminals 325 being located at the connections shown in the figures. Each connection terminal 325 is electrically connected to one of the charging terminals 301 through the power cable 309. Each of the connection terminals 325 includes a liquid-cooled tube fixing through-hole 325-1 and a wire connecting through-hole 325-2. The liquid-cooling tube fixing through hole 325-1 of each connection terminal 325 is used for penetrating the liquid-cooling tube 305 corresponding to one of the charging terminals 301 to which it is electrically connected. The wire connection via 325-2 of each connection terminal 325 is used to electrically connect one power copper bar of the charging post through a wire.

In one possible embodiment, the direction of penetration of the wire connection via 325-2 is perpendicular to the direction of penetration of the liquid cooling tube fixing via 325-1. The wire 40 can be conveniently connected to the wire-fixing through hole 325 based on this arrangement.

Fig. 8 is a schematic view of the connection of the wire connection via 325-2 of the connection terminal 325 in fig. 7 with a wire. The wire 40 includes metal pads 401 and 403 at both ends. The screw 50 is inserted through the through hole of the metal pad 401 to be engaged with the wire connection through hole 325-2, thereby fastening the wire 40 and electrically connecting the wire 40 and the connection terminal 325.

It is understood that the connection manner of the metal pad 403 and the power copper bar of the charging post is the same as that of the metal pad 401 and the wire connection via 325-2, and will not be described here again.

When in actual use, the charging pile further comprises a power module, wherein the power module is used for carrying out power conversion on electric energy input by the input end of the power module and outputting the converted electric energy to the power copper bar. The electric energy on the power copper bar is output to the wiring terminal 325 through the lead wire 40, so that the electric energy is transmitted to the charging terminal 301 through the power cable 309, and further the electric energy in the charging pile is transmitted to the charging gun.

In the embodiment of the present application, flexible matching of the wires 40 can be achieved by providing the wire connection through-holes 325-2 on the connection terminals 325. In one possible embodiment, the diameter of the wire 40 is greater than the diameter of the power cable 309. The wires between the power copper bars and the wiring positions can not dissipate heat through the liquid cooling pipes, and only can dissipate heat naturally. Accordingly, in order to solve the problem of heat dissipation of the cable from the power copper bar to the junction, the wire 40 having a larger diameter may be selected, thereby improving the heat dissipation capability of the cable from the power copper bar to the junction.

Based on this, the embodiment of the application also provides a charging pile. As shown in fig. 9, the charging stake 90 includes the charging gun described above, a heat exchanger, a cold liquid tank, and a water pump. The cooling pool in the charging gun is communicated with at least one of the heat exchanger and the cold liquid box through a liquid cooling pipe. The cooling liquid box is used for containing cooling liquid, the heat exchanger is used for receiving the cooling liquid transmitted by the cooling tank through the liquid cooling pipe, and the water pump is used for driving the cooling liquid to flow among the liquid cooling pipe, the heat exchanger and the cooling liquid box.

Referring to fig. 4, 5 and 9, the working principle of the liquid-cooled charging gun will be described.

In one possible embodiment, charging gun 30 includes only two liquid cooling tubes 305, and no header 313. In this case, one liquid cooling pipe 305 is a water inlet pipe, and the other liquid cooling pipe 305 is a water outlet pipe. The water outlet pipe is communicated with the heat exchanger, and the water inlet pipe is communicated with the liquid cooling box. After the cooling liquid in the cooling pool 303 of the charging gun 30 dissipates heat for the charging terminal 301, the cooling liquid with higher temperature is output to the heat exchanger in the charging pile through the water outlet pipe. The cooling liquid with higher temperature is driven by the water pump to flow into the cooling liquid tank after being radiated by the heat exchanger, and then flows into the cooling tank 303 through the water inlet pipe. Thereby reciprocally cycling, the purpose of heat dissipation is achieved for the power cable 309 and the charging terminal 301.

In one possible embodiment, the water outlet pipe is connected to the cold liquid tank and the water inlet pipe is connected to the heat exchanger. After the cooling liquid in the cooling pool 303 of the charging gun 30 dissipates heat for the charging terminal 301, the cooling liquid with higher temperature is output to a cooling liquid tank in the charging pile through a water outlet pipe. The cooling liquid with higher temperature flows into the heat exchanger through the driving of the water pump. The cooling liquid with higher temperature flows into the cooling pool through the water inlet pipe after being radiated by the heat exchanger. Thereby reciprocally cycling, the purpose of heat dissipation is achieved for the power cable 309 and the charging terminal 301.

In one possible embodiment, charging gun 30 includes two liquid cooling tubes 305 and a manifold 313. In this case, the manifold 313 is a water inlet pipe and both liquid cooled pipes 305 are water outlet pipes. The working principle is the same as that described above, and the description thereof is omitted here.

In one possible embodiment, the heat exchanger is a wind-liquid heat exchanger. That is, the surface of the heat exchanger is provided with the fan, and the fan can accelerate the dissipation of heat on the surface of the heat exchanger, so that the heat dissipation efficiency of the heat exchanger is improved.

The foregoing is merely specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the changes or substitutions are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a rifle charges, its characterized in that, the rifle that charges includes cooling tank, charging terminal, liquid cold tube and fixing device, the cooling tank is used for the cooling charging terminal, wherein:

the charging terminal comprises a cable connecting end and a charging interface end, wherein the cable connecting end is used for connecting a power cable, the charging interface end is used for connecting a direct-current charging interface of a charging socket of an electric vehicle, the liquid cooling pipe is communicated with the cooling tank, and the fixing device is used for enabling the liquid cooling pipe to be fixedly contacted with the cable connecting end.

2. The charging gun according to claim 1, wherein the fixing device is integrally formed with the cable connection end of the charging terminal, the fixing device and the cable connection end are arranged in a stacked manner along a first direction, the fixing device comprises a through hole penetrating the fixing device along a second direction, the liquid cooling pipe is communicated with the cooling tank along the second direction through the through hole, and the first direction is perpendicular to the second direction.

3. The charging gun of claim 2, wherein the cooling tank includes a liquid cooling interface for communicating the cooling tank with the liquid cooling tube, a projection of the liquid cooling interface along the second direction overlapping a projection of the through hole at least partially, and a projection of the liquid cooling tube along the first direction overlapping a projection of the cable connection end.

4. The charging gun according to claim 1, wherein the fixing device is integrally formed with the cable connection end of the charging terminal, the fixing device and the cable connection end are arranged in a stacked manner along a first direction, the fixing device comprises a groove penetrating the fixing device along a second direction, the liquid cooling pipe penetrates the groove along the second direction to be communicated with the cooling tank, and the first direction is perpendicular to the second direction.

5. The charging gun of claim 4, wherein the cooling tank comprises a liquid cooling interface for communicating the cooling tank with the liquid cooling tube, wherein a projection of the groove along the second direction at least partially overlaps a projection of the liquid cooling interface, and wherein a projection of the liquid cooling tube along the first direction overlaps a projection of the cable connection.

6. The charging gun of claim 3 or 5, wherein the charging terminal comprises a recess for receiving the cooling pool, the recess comprising two side walls, one side wall being adjacent to the cable connection end in the second direction, the other side wall being adjacent to the charging interface end in the second direction, the height of the one side wall being greater than the height of the other side wall in the first direction.

7. The charging gun according to claim 6, wherein the cooling cells are arranged between the two side walls in the second direction, a length of the cooling cells is smaller than a distance between the two side walls in the second direction, and a height of the cooling cells is smaller than or equal to a height of the one side wall in the first direction.

8. The charging gun of claim 7, wherein the cable connection end includes a weld for welding a power cable, the weld being aligned opposite the fixture along the first direction.

9. The charging gun according to claim 8, wherein the charging gun comprises two charging terminals, the two charging terminals are arranged at intervals along a third direction, the third direction is perpendicular to the first direction and the second direction, the cooling pool is stacked on the two charging terminals along the first direction, and the width of the cooling pool is larger than the gap between the two charging terminals along the third direction.

10. The charging gun of claim 9, wherein the charging gun comprises two connection terminals, each connection terminal is electrically connected with one charging terminal through the power cable, each connection terminal comprises a liquid cooling pipe fixing through hole and a wire connecting through hole, the liquid cooling pipe fixing through hole of each connection terminal is used for penetrating the liquid cooling pipe corresponding to one charging terminal electrically connected with the liquid cooling pipe, and the wire connecting through hole of each connection terminal is used for electrically connecting one power copper bar of a charging pile through a wire.

11. A charging pile, characterized in that the charging pile comprises a heat exchanger, a cold liquid tank, a water pump and a charging gun according to any one of claims 1-10, the cooling tank is communicated with at least one of the heat exchanger and the cold liquid tank through the liquid cooling pipe, wherein:

the cold liquid box is used for containing cooling liquid;

the heat exchanger is used for receiving the cooling liquid transmitted by the cooling pool through the liquid cooling pipe;

the water pump is used for driving the cooling liquid to flow among the liquid cooling pipe, the heat exchanger and the cold liquid tank.