Charging gun and charging system

Abstract

The utility model provides a charging gun and a charging system, the charging gun comprises a charging terminal, and a cavity is formed in the charging terminal; and the cooling assembly comprises a cooling shell, the cooling shell is arranged in the cavity, a fluid channel is formed in the cooling shell, and a cooling working medium in the fluid channel can cool the charging terminal, so that the charging terminal is cooled, the charging efficiency when the charging gun charges the vehicle is ensured, and the charging safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging, and specifically relates to a charging gun and a charging system. Background Art

[0002] With the popularity of electric vehicles, the performance stability and safety of charging guns, as their core components, are increasingly attracting attention. During the charging process, heating inside the charging gun terminal is a common problem.

[0003] At present, most charging gun terminals use traditional heat dissipation methods, such as adding heat sinks to the outside of the terminal and optimizing the thermal conductivity of the material. However, the heating area inside the charging terminal still cannot be cooled, making it difficult to control the terminal temperature. This not only affects the charging efficiency, but may also cause safety hazards. Utility Model Content

[0004] One purpose of the utility model is to provide a new technical solution for a charging gun and a charging system.

[0005] According to a first aspect of the utility model, a charging gun is provided, comprising:

[0006] A charging terminal, wherein a cavity is formed inside the charging terminal;

[0007] A cooling component includes a cooling shell, the cooling shell is arranged in the cavity, a fluid channel is formed inside the cooling shell, and the cooling medium in the fluid channel can cool the charging terminal.

[0008] Optionally, the charging terminal includes a terminal head, a first cavity is formed inside the terminal head, and the cooling housing includes a plug-in section, a first flow channel is formed inside the plug-in section;

[0009] The plug-in section is plugged into the first cavity, and the cooling medium in the first flow channel can cool the terminal head.

[0010] Optionally, a plurality of first heat sinks are disposed in the first flow channel, and the plurality of first heat sinks are distributed at intervals on the inner wall of the first flow channel.

[0011] Optionally, the charging terminal includes a terminal tail portion, a side of the terminal tail portion has a second cavity, the cooling housing includes a matching section, a second flow channel is formed inside the matching section, and the second flow channel is connected to the first flow channel;

[0012] The matching section is arranged in the second cavity, and the cooling medium in the second flow channel can cool the terminal tail.

[0013] Optionally, a plurality of second heat sinks are disposed in the second flow channel, and the plurality of second heat sinks are distributed at intervals on the inner wall of the second flow channel.

[0014] Optionally, the cooling assembly further comprises a cover plate, and a side of the cooling housing away from the terminal head has an opening;

[0015] The cover plate is provided with a liquid inlet and a liquid outlet, the cover plate is connected to the opening, and the liquid inlet and the liquid outlet are both communicated with the fluid channel.

[0016] Optionally, an extension pipe is provided on the cover plate, a first port of the extension pipe is connected to the liquid inlet, and a second port of the extension pipe is embedded in the first flow channel.

[0017] Optionally, a flow guiding protrusion is provided in the first flow channel, and a curved surface on the flow guiding protrusion faces the second port of the extension pipe.

[0018] Optionally, two electrical connectors are further included, the charging terminal includes a positive charging terminal and a negative charging terminal, and the two electrical connectors are respectively connected to the positive charging terminal and the negative charging terminal.

[0019] Optionally, a heat conducting member is further included, and the heat conducting member is arranged between the cooling shell and the inner wall of the cavity.

[0020] According to a second aspect of the utility model, a charging system is provided, comprising the charging gun described in the first aspect.

[0021] A technical effect of the utility model is:

[0022] An embodiment of the present application provides a charging gun, which includes a charging terminal with a cavity formed inside the charging terminal; a cooling component, the cooling component includes a cooling shell, the cooling shell is arranged in the cavity, and a fluid channel is formed inside the cooling shell. The cooling medium in the fluid channel can cool the charging terminal, so that the charging terminal is cooled, thereby ensuring the charging efficiency when the charging gun charges the vehicle and improving the charging safety.

[0023] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 A schematic diagram of a charging gun provided in one embodiment of the utility model;

[0026] Figure 2 A cross-sectional view of a charging gun provided in one embodiment of the utility model;

[0027] Figure 3 A schematic diagram of a charging terminal of a charging gun provided in one embodiment of the utility model;

[0028] Figure 4 A schematic diagram of a cooling assembly of a charging gun provided in one embodiment of the utility model;

[0029] Figure 5 A top view of a cooling assembly of a charging gun provided in one embodiment of the utility model;

[0030] Figure 6 A cross-sectional view of a cooling assembly of a charging gun provided in one embodiment of the utility model;

[0031] Figure 7 A schematic diagram of a cover plate of a cooling assembly of a charging gun provided in one embodiment of the utility model;

[0032] Figure 8 A top view of a cover plate of a cooling assembly of a charging gun provided in one embodiment of the utility model;

[0033] Fig. 9 A top view of another cooling assembly of a charging gun provided in one embodiment of the utility model;

[0034] Fig.10 A cross-sectional view of a cooling assembly of another charging gun provided in one embodiment of the utility model;

[0035] Fig.11 A schematic diagram of a cover plate of another cooling assembly of a charging gun provided in one embodiment of the utility model;

[0036] Fig.12 A top view of a cover plate of another cooling assembly of a charging gun provided in one embodiment of the utility model;

[0037] Fig.13 A schematic diagram of a cover plate of a cooling assembly of another charging gun provided in one embodiment of the utility model;

[0038] Fig.14 A top view of a cover plate of a cooling assembly of another charging gun provided in one embodiment of the utility model;

[0039] Fig.15 A cross-sectional view of a cooling assembly of another charging gun provided in one embodiment of the utility model (excluding the cover plate);

[0040] Fig.16 A top view of a cooling assembly of another charging gun provided in one embodiment of the utility model;

[0041] Fig.17 A cross-sectional view of a cooling assembly of another charging gun provided in one embodiment of the utility model;

[0042] Fig.18 A schematic diagram of the internal working fluid flow of a cooling assembly of another charging gun provided in an embodiment of the utility model.

[0043] Among them: 1. charging terminal; 11. terminal head; 100. cavity; 101. first cavity; 111. first convex rib; 112. second convex rib; 113. waterproof groove; 12. terminal tail; 102. second cavity; 13. positive charging terminal; 14. negative charging terminal; 2. cooling assembly; 21. cooling shell; 211. plug-in section; 212. mating section; 22. fluid channel; 221. first flow channel; 2211. first heat sink; 2212. guide protrusion; 222. second flow channel; 2221. second heat sink; 23. cover plate; 231. liquid inlet; 232. liquid outlet; 233. extension pipe; 3. electrical connector. DETAILED DESCRIPTION

[0044] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0045] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0046] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0047] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0050] Reference Figures 1 to 4 The embodiment of the present application provides a charging gun, which is used to charge a vehicle, and the charging gun includes:

[0051] A charging terminal 1, wherein a cavity 100 is formed inside the charging terminal 1;

[0052] The cooling assembly 2 includes a cooling shell 21 , which is disposed in the cavity 100 . A fluid channel 22 is formed inside the cooling shell 21 . The cooling medium in the fluid channel 22 can cool the charging terminal 1 .

[0053] In this embodiment, the charging terminal 1 is fixed on the housing of the charging gun. When the charging gun is working, the charging terminal 1 is matched with the power female terminal in the charging socket. The combination of the charging terminal 1 and the charging socket female terminal connects the charging system where the charging gun is located with the battery system of the vehicle to facilitate charging the battery of the vehicle.

[0054] When the charging gun charges the vehicle through the charging terminal 1, heat is generated and transferred to the cooling shell 21. The cooling medium in the fluid channel 22 in the cooling shell 21 continues to flow. After the heat is transferred to the cooling medium, it will be absorbed and carried away by the cooling medium, so that the charging terminal 1 is cooled, thereby preventing the charging terminal 1 from being overheated during charging.

[0055] The cooling shell 21 is arranged in the cavity 100, which increases the contact area between the charging terminal 1 and the cooling shell 21, thereby expanding the heat exchange area between the charging terminal 1 and the fluid channel 22, so that the cooling medium in the fluid channel 22 can timely and efficiently cool the charging terminal 1, so that the temperature of the charging terminal 1 can be effectively controlled, ensuring the charging efficiency when the charging gun charges the vehicle and improving the charging safety.

[0056] In one embodiment, the cooling medium in the fluid channel 22 may be one or a combination of water, ethylene glycol and dimethyl silicone oil.

[0057] The cooling shell 21 of this charging gun is arranged in the cavity 100, so that the charging gun can pass a large current with a smaller power line diameter than the relevant standard, achieving safe and fast charging conditions while complying with the requirements of the relevant standards for the temperature rise of the charging terminals during charging.

[0058] In one embodiment, the material of the cooling housing 21 may be an insulating material with good thermal conductivity, for example, the material of the cooling housing 21 is a ceramic material to form a ceramic housing with a thermal conductivity of 70-210 W / mK, so that the cooling housing 21 can transfer the heat to the cooling medium after absorbing the heat. Moreover, the ceramic housing has good insulation and withstand voltage performance, which ensures the stability of the charging terminal 1 during charging.

[0059] The charging gun provided in the embodiment of the present application includes: a charging terminal 1, a cavity 100 is formed inside the charging terminal 1; a cooling component 2, the cooling component 2 includes a cooling shell 21, the cooling shell 21 is arranged in the cavity 100, and a fluid channel 22 is formed inside the cooling shell 21. The cooling medium in the fluid channel 22 can cool the charging terminal 1, so that the charging terminal 1 is cooled, thereby ensuring the charging efficiency when the charging gun charges the vehicle and improving the safety of charging.

[0060] In one embodiment, see Figure 3 and Figure 4 The charging terminal 1 includes a terminal head 11, a first cavity 101 is formed inside the terminal head 11, and the cooling shell 21 includes a plug-in section 211, and a first flow channel 221 is formed inside the plug-in section 211;

[0061] The plug-in section 211 is plugged into the first cavity 101 , and the cooling medium in the first flow channel 221 can cool the terminal head 11 .

[0062] In this embodiment, when the plug-in section 211 is inserted into the first cavity 101, it can be close to the inner wall of the first cavity 101 to facilitate heat transfer between the terminal head 11 and the plug-in section 211, thereby improving the efficiency of the cooling medium in the first flow channel 221 in cooling the terminal head 11.

[0063] Specifically, when the charging gun charges the vehicle through the charging terminal 1, the current passes through the charging terminal 1. Since the terminal head 11 is the part that mates with the female terminal in the charging socket and generates an electrical connection when the charging gun is working, and the contact resistance between the terminal head 11 and the female terminal is large, more heat is generated on the terminal head 11. Heat conduction and heat radiation occur on the terminal head 11 and transfer the heat to the first flow channel 221 inside it, and the cooling medium in the first flow channel 221 can cool the terminal head 11.

[0064] In one embodiment, see Figure 5 and Figure 6 A plurality of first heat sinks 2211 are disposed in the first flow channel 221 , and the plurality of first heat sinks 2211 are distributed at intervals on the inner wall of the first flow channel 221 .

[0065] In this embodiment, when the terminal head 11 transfers heat to the first flow channel 221 inside it, the inner wall temperature of the first flow channel 221 will increase, and the cooling medium in the first flow channel 221 can exchange heat with the inner wall of the first flow channel 221; and multiple first heat sinks 2211 are distributed at intervals on the inner wall of the first flow channel 221, which increases the heat exchange area of ​​the inner wall of the first flow channel 221 and enhances the heat exchange efficiency between the cooling medium in the first flow channel 221 and the terminal head 11.

[0066] In one embodiment, see Figure 3 and Figure 4 The charging terminal 1 includes a terminal tail portion 12, a side of the terminal tail portion 12 has a second cavity 102, the cooling housing 21 includes a matching section 212, a second flow channel 222 is formed inside the matching section 212, and the second flow channel 222 is connected to the first flow channel 221;

[0067] The mating section 212 is disposed in the second cavity 102 , and the cooling medium in the second flow channel 222 can cool the terminal tail 12 .

[0068] In this embodiment, the terminal head 11 is connected to the terminal tail 12 and receives current through the terminal tail 12, causing the temperature of the terminal tail 12 to rise when the charging gun charges the vehicle; when the terminal tail 12 transfers heat to the second flow channel 222 inside it, the cooling medium in the second flow channel 222 can exchange heat with the inner wall of the second flow channel 222, thereby ensuring the heat exchange efficiency between the cooling medium in the second flow channel 222 and the terminal tail 12.

[0069] In this embodiment, the cavity 100 includes the first cavity 101 and the second cavity 102 mentioned above, that is, the first cavity 101 and the second cavity 102 are connected to each other in the charging terminal 1, so as to provide an integrated cooling shell 21 in the charging terminal 1.

[0070] In one embodiment, see Fig. 9 and Fig.10 A plurality of second heat sinks 2221 are disposed in the second flow channel 222 , and the plurality of second heat sinks 2221 are distributed at intervals on the inner wall of the second flow channel 222 .

[0071] When the terminal tail 12 transfers heat to the second flow channel 222 inside it, the inner wall temperature of the second flow channel 222 will increase, and the cooling medium in the second flow channel 222 can exchange heat with the inner wall of the second flow channel 222; and multiple second heat sinks 2221 are distributed at intervals on the inner wall of the second flow channel 222, which increases the heat exchange area of ​​the inner wall of the second flow channel 222 and enhances the heat exchange efficiency between the cooling medium in the second flow channel 222 and the terminal tail 12.

[0072] In this embodiment, the second heat sink 2221 includes a first type of heat sink and a second type of heat sink. The length of the first type of heat sink is greater than that of the second type of heat sink to increase the heat exchange area of ​​the inner wall of the second flow channel 222; and the second type of heat sink avoids the connection between the first flow channel 221 and the second flow channel 222 to ensure smooth connection between the first flow channel 221 and the second flow channel 222.

[0073] In one embodiment, see Figure 3 One end of the terminal head 11 connected to the terminal tail 12 has a first convex rib 111 and a second convex rib 112 arranged at intervals, and a waterproof groove 113 is formed between the first convex rib 111 and the second convex rib 112. The waterproof groove 113 is used to place a sealing ring to ensure the protection performance of the charging gun and prevent the charging gun from causing short circuit, ablation, fire and other failure risks due to leakage during charging.

[0074] In one embodiment, see Figure 7 , Figure 8 , Fig.11 and Fig.12The cooling assembly 2 further includes a cover plate 23, and the cooling housing 21 has an opening on a side away from the terminal head 11;

[0075] The cover plate 23 is provided with a liquid inlet 231 and a liquid outlet 232 . The cover plate 23 is connected to the opening, and the liquid inlet 231 and the liquid outlet 232 are both in communication with the fluid channel 22 .

[0076] In this embodiment, the liquid inlet 231 is connected to the external coolant inlet pipe, and the liquid outlet 232 is connected to the external coolant outlet pipe to form a cooling medium flow loop in the fluid channel 22, so that the cooling medium can cool the charging terminal 1 in the cooling assembly 2.

[0077] The fluid channel 22 includes the above-mentioned first flow channel 221 and the second flow channel 222. The second flow channel 222 is located between the cover plate 23 and the first flow channel 221. The cooling medium flowing in from the liquid inlet 231 can first flow into the second flow channel 222, and then flow into the first flow channel 221 after filling at least a portion of the second flow channel 222; or the cooling medium flowing in from the liquid inlet 231 can also directly flow into the first flow channel 221, and then flow into the second flow channel 222 after filling at least a portion of the first flow channel 221. Both of these can form a cooling medium loop in the first flow channel 221 and the second flow channel 222, thereby improving the cooling effect of the cooling component 2.

[0078] In one embodiment, the position of the liquid inlet 231 may be lower than the liquid outlet 232 to ensure that the cooling medium can fill the first flow channel 221 and the second flow channel 222 in the cooling shell 21 as much as possible before flowing out, thereby increasing the heat exchange area of ​​the cooling shell 21 .

[0079] In one embodiment, see Fig.13 and Fig.14 An extension pipe 233 is disposed on the cover plate 23 , a first port of the extension pipe 233 is connected to the liquid inlet 231 , and a second port of the extension pipe 233 is embedded in the first flow channel 221 .

[0080] In this embodiment, see Fig.17 and Fig.18 When the cooling medium flowing in from the liquid inlet 231 passes through the extension pipe 233, it will directly flow into the first flow channel 221 after passing over the second flow channel 222, and then flow into the second flow channel 222 after filling the first flow channel 221, so as to ensure the heat exchange efficiency between the cooling medium in the first flow channel 221 and the terminal head 11.

[0081] In one embodiment, see Figures 15 to 18 A flow guiding protrusion 2212 is disposed in the first flow channel 221 , and the arc surface on the flow guiding protrusion 2212 faces the second port of the extension pipe 233 .

[0082] In this embodiment, the cooling medium flowing out from the second port of the extension pipe 233 will directly flow into the first flow channel 221, and the guide protrusion 2212 in the first flow channel 221 has an outwardly convex arc surface, which faces the second port of the extension pipe 233, so as to guide the cooling medium flowing out of the second port of the extension pipe 233 to both sides of the guide protrusion 2212, thereby preventing the cooling medium from impacting the plane of the inner wall of the first flow channel 221 and then flowing, thereby reducing the flow resistance of the cooling medium flow and improving the reliability of the cooling component 2 during cooling. Fig.18 shown.

[0083] In one embodiment, see Figure 2 The charging gun also includes two electrical connectors 3 , the charging terminal 1 includes a positive charging terminal 13 and a negative charging terminal 14 , and the two electrical connectors 3 are connected to the positive charging terminal 13 and the negative charging terminal 14 respectively.

[0084] In this embodiment, the two electrical connectors 3 can be respectively connected to the positive charging terminal 13 and the negative charging terminal 14 by ultrasonic welding, so as to conduct the electricity of the power grid to the charging terminal 1.

[0085] The positive charging terminal 13 and the negative charging terminal 14 may both include a terminal head 11 and a terminal tail 12. For example, the positive charging terminal 13 includes a terminal head 11 and a terminal tail 12, and the negative charging terminal 14 includes a terminal head 11 and a terminal tail 12. A first cavity 101 is provided in the terminal head 11 of the positive charging terminal 13 and the terminal head 11 of the negative charging terminal 14, and a second cavity 102 is formed between the terminal tail 12 of the positive charging terminal 13 and the terminal tail 12 of the negative charging terminal 14.

[0086] In one embodiment, the charging gun further includes a heat conductor, which is disposed between the cooling shell 21 and the inner wall of the cavity 100 .

[0087] In this embodiment, the heat conductive member may be a flexible heat conductive member to reduce the gap between the cooling shell 21 and the inner wall of the cavity 100 , thereby improving the heat transfer efficiency between the charging terminal 1 and the cooling shell 21 .

[0088] In a specific embodiment, the heat conductive member is a heat conductive gel, and the inner wall surface of the cavity 100 in the charging terminal 1 is coated with the heat conductive gel, and the heat conductive gel contacts the cooling housing 21; because the cooling housing 21 and the inner wall of the cavity 100 are not necessarily in complete contact, the use of the heat conductive gel can well fill the gap between the two, and avoid heat transfer between the cooling housing 21 and the inner wall of the cavity 100 through air. At the same time, the use of the heat conductive gel also increases the vibration reliability of the charging gun.

[0089] An embodiment of the present application provides a charging system, which includes the above-mentioned charging gun.

[0090] In this embodiment, the charging gun of the charging system includes a charging terminal 1, and a cavity 100 is formed inside the charging terminal 1; a cooling component 2, and the cooling component 2 includes a cooling shell 21, and the cooling shell 21 is arranged in the cavity 100. A fluid channel 22 is formed inside the cooling shell 21. The cooling medium in the fluid channel 22 can cool the charging terminal 1, so that the charging terminal 1 is cooled, thereby ensuring the charging efficiency when the charging gun charges the vehicle and improving the charging safety.

[0091] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A charging gun, characterized in that: include: A charging terminal (1), wherein a cavity (100) is formed inside the charging terminal (1); A cooling component (2), the cooling component (2) comprising a cooling shell (21), the cooling shell (21) being arranged in the cavity (100), a fluid channel (22) being formed inside the cooling shell (21), and a cooling medium in the fluid channel (22) being capable of cooling the charging terminal (1).

2. The charging gun according to claim 1, characterized in that: The charging terminal (1) comprises a terminal head (11), a first cavity (101) is formed inside the terminal head (11), and the cooling housing (21) comprises a plug-in section (211), a first flow channel (221) is formed inside the plug-in section (211); The plug-in section (211) is plugged into the first cavity (101), and the cooling medium in the first flow channel (221) can cool the terminal head (11).

3. The charging gun according to claim 2, characterized in that: A plurality of first heat sinks (2211) are arranged in the first flow channel (221), and the plurality of first heat sinks (2211) are distributed at intervals on the inner wall of the first flow channel (221).

4. The charging gun according to claim 2, characterized in that: The charging terminal (1) comprises a terminal tail (12), a side of the terminal tail (12) having a second cavity (102), the cooling housing (21) comprises a matching section (212), a second flow channel (222) is formed inside the matching section (212), and the second flow channel (222) is connected to the first flow channel (221); The matching section (212) is arranged in the second cavity (102), and the cooling medium in the second flow channel (222) can cool the terminal tail (12).

5. The charging gun according to claim 4, characterized in that: A plurality of second heat sinks (2221) are arranged in the second flow channel (222), and the plurality of second heat sinks (2221) are distributed at intervals on the inner wall of the second flow channel (222).

6. The charging gun according to claim 4, characterized in that: The cooling assembly (2) further comprises a cover plate (23), and a side of the cooling housing (21) away from the terminal head (11) has an opening; The cover plate (23) is provided with a liquid inlet (231) and a liquid outlet (232); the cover plate (23) is connected to the opening, and the liquid inlet (231) and the liquid outlet (232) are both in communication with the fluid channel (22).

7. The charging gun according to claim 6, characterized in that: An extension pipe (233) is provided on the cover plate (23), a first port of the extension pipe (233) is connected to the liquid inlet (231), and a second port of the extension pipe (233) is embedded in the first flow channel (221).

8. The charging gun according to claim 7, characterized in that: A flow guiding protrusion (2212) is provided in the first flow channel (221), and the arc-shaped surface on the flow guiding protrusion (2212) faces the second port of the extension pipe (233).

9. The charging gun according to claim 1, characterized in that: It also includes two electrical connectors (3), the charging terminal (1) includes a positive charging terminal (13) and a negative charging terminal (14), and the two electrical connectors (3) are respectively connected to the positive charging terminal (13) and the negative charging terminal (14).

10. The charging gun according to claim 1, characterized in that: It also comprises a heat conducting member, which is arranged between the cooling shell (21) and the inner wall of the cavity (100).

11. A charging system, characterized in that: Including the charging gun described in any one of claims 1-10.

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