Liquid cooling charging gun

Abstract

The utility model discloses a liquid cooling charging gun, which comprises a gun head, a gun shell, an insulating bush, a terminal assembly and a charging cable, the gun head is arranged at the end part of the gun shell, the insulating bush is embedded in the gun head, the terminal assembly is arranged in the insulating bush, one end of the charging cable is arranged in the gun shell and is electrically connected with the terminal assembly, and the other end of the charging cable is electrically connected with the terminal assembly. The terminal assembly comprises a positive terminal and a negative terminal, a plurality of in-cable flow channels are arranged in the charging cable, a first flow channel and a second flow channel which are used for allowing an insulating cooling liquid to flow to cool the positive terminal and the negative terminal are arranged in the insulating bush, and the first flow channel and the second flow channel are respectively communicated with the corresponding in-cable flow channels. According to the utility model, the insulating cooling liquid flow channel used for cooling the positive terminal and the negative terminal is arranged in the insulating bush and is matched with the inner cable flow channel of the charging cable, so that the positive terminal and the negative terminal can be in direct contact with the insulating cooling liquid, the temperature of the charging terminal can be reduced, and the service life of the charging terminal can be prolonged. And charging interruption caused by over-high temperature of the charging terminal can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of charging guns, and in particular relates to a liquid-cooling charging gun. Background Art

[0002] In order to shorten the charging time, charging equipment manufacturers usually increase the charging power to meet users' demand for fast charging. However, this high-current charging easily causes the charging terminal to generate a lot of heat. If the heat is not discharged in time, as the temperature of the charging terminal continues to rise, it will not only trigger the temperature protection and make charging impossible, but also there is a risk of causing a fire. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a liquid-cooled charging gun to overcome the problem of poor heat dissipation of the charging gun in the prior art.

[0004] In order to achieve the above technical objectives, the utility model provides a liquid-cooled charging gun, including a gun head, a gun shell, an insulating bushing, a terminal assembly and a charging cable, the gun head is arranged at the end of the gun shell, the insulating bushing is embedded in the gun head, the terminal assembly is arranged in the insulating bushing, one end of the charging cable is arranged in the gun shell and is electrically connected to the terminal assembly, the terminal assembly includes a positive terminal and a negative terminal, a plurality of cable flow channels are provided in the charging cable, and a first flow channel and a second flow channel are provided in the insulating bushing for insulating coolant to flow to cool the positive terminal and the negative terminal, and the first flow channel and the second flow channel are respectively connected to the corresponding cable flow channels.

[0005] In one embodiment, the charging cable includes a plurality of wire cores connected to the positive terminal and the negative terminal, a plurality of wire tubes arranged outside the plurality of wire cores, and an insulating layer wrapped around the plurality of wire tubes, and the cable inner flow channel is formed between the plurality of wire cores and the plurality of wire tubes.

[0006] In one embodiment, the flow channel in the cable includes a first liquid inlet channel, a first liquid outlet channel, a second liquid inlet channel and a second liquid outlet channel, the first liquid inlet channel and the first liquid outlet channel are connected to the first channel, and the second liquid inlet channel and the second liquid outlet channel are connected to the second channel.

[0007] In one embodiment, the liquid-cooled charging gun further includes a cable liquid outlet nozzle and a cable liquid inlet nozzle connected between the insulating bushing and the plurality of wire tubes.

[0008] In one embodiment, the liquid-cooled charging gun further includes a magnetic suction cup assembly disposed in the gun housing and used for engaging with a charging base of a car.

[0009] In one embodiment, the suction cup assembly includes a locking hook hinged to the gun housing, a first end of the locking hook extending out of the gun housing and capable of rotating upward and then downward relative to the gun housing to be inserted into the charging seat.

[0010] In one embodiment, the suction cup assembly further comprises a suction cup fixed in the gun housing, and the suction cup can attract the locking hook to rotate downward after the locking hook rotates upward.

[0011] In one embodiment, a suction block is provided on the locking hook, and the suction block is located above the suction cup and can attract the suction cup.

[0012] In one embodiment, the suction cup assembly further includes an elastic element, which is disposed between the gun housing and the second end of the locking hook and provides a restoring force after the second end of the locking hook is pressed.

[0013] In one embodiment, the suction cup assembly further includes a first micro switch disposed at a first end close to the locking hook, and a second micro switch disposed at a second end of the locking hook.

[0014] By adopting the above technical solution, the utility model has the following beneficial effects:

[0015] The utility model provides an insulating coolant flow channel for cooling the positive terminal and the negative terminal in the insulating bushing, and matches it with the flow channel in the charging cable, so that the positive terminal and the negative terminal can be in direct contact with the insulating coolant, which is not only beneficial to reduce the temperature of the charging terminal, but also beneficial to avoid charging interruption due to excessive temperature of the charging terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A schematic diagram of the structure of a liquid-cooled charging gun provided in an embodiment of the utility model;

[0018] Figure 2 for Figure 1 The exploded structural diagram of the charging gun shown;

[0019] Figure 3 for Figure 1 A schematic diagram of the structure of the gun head, insulating bushing, cable liquid outlet nozzle and cable liquid inlet nozzle in the charging gun shown;

[0020] Figure 4 for Figure 1 The schematic diagram of the cross-sectional structure of the charging gun in the AA direction is shown;

[0021] Figure 5 for Figure 3 The schematic diagram of the cross-sectional structure of the structure shown in the BB direction;

[0022] Figure 6 for Figure 1 The schematic diagram of the structure of the locking hook in the charging gun is shown.

[0023] Description of reference numerals:

[0024] 1. Gun head; 2. Gun housing; 3. Insulating bushing; 4. Terminal assembly; 5. Charging cable; 6. Cable outlet nozzle; 7. Cable inlet nozzle; 8. Suction cup assembly; 9. Sealing ring; 10. Tail cover;

[0025] 21. gun body; 21a. receiving chamber; 22. upper cover; 22a. receiving groove;

[0026] 31. first flow channel; 32. second flow channel;

[0027] 41. Positive terminal; 42. Negative terminal;

[0028] 51, wire core; 52, wire tube; 53, insulation layer; 54, flow channel in the cable; 54a, first liquid inlet flow channel; 54b, first liquid outlet flow channel; 54c, second liquid inlet flow channel; 54d, second liquid outlet flow channel;

[0029] 81, lock hook; 81a, lock hook portion; 81b, magnetic attraction portion; 81c, hinge portion; 81d, pressing portion; 82, suction block; 83, suction cup; 84, elastic element;

[0030] 91. first sealing ring; 92. second sealing ring; 93. third sealing ring;

[0031] 10a, upper clamp; 10b, lower clamp; 10c, fixing sleeve. DETAILED DESCRIPTION

[0032] The specific embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the description of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] In the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like 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 an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0035] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0036] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0037] See also Figure 1 and Figure 2 The embodiment of the utility model provides a liquid-cooled charging gun, which includes a gun head 1, a gun shell 2, an insulating bushing 3, a terminal assembly 4 and a charging cable 5, wherein the gun head 1 is mounted on one end of the gun shell 2, the insulating bushing 3 is embedded in the gun head 1, the terminal assembly 4 is mounted on the insulating bushing 3, and one end of the charging cable 5 is inserted into the gun shell 2 from the other end of the gun shell 1 and is electrically connected to the terminal assembly 4. It should be noted that the terminal assembly 4 mentioned here can include DC power supply terminals (DC+, DC-), grounding terminals (PE), message interactive communication terminals (S+, S-), communication terminals (CC1, CC2) and low-voltage auxiliary power supply terminals (A+, A-) according to the functional division. The terminal assembly 4 in this embodiment refers to the DC power supply terminals (DC+, DC-), that is, the positive terminal 41 and the negative terminal 42.

[0038] like Figure 3 and Figure 4As shown, since the positive terminal 41 and the negative terminal 42 of the charging gun will generate a large amount of heat during the large current input and output process, in order to discharge the heat in time, a plurality of cable flow channels 54 are provided in the charging cable 5, and a mutually independent first flow channel 31 and a second flow channel 32 are provided in the insulating bushing 3, wherein the first flow channel 31 is for the insulating coolant to flow to cool the positive terminal 41, and the second flow channel 32 is for the insulating coolant to flow to cool the negative terminal 42, and the first flow channel 31 and the second flow channel 32 are respectively connected to the corresponding cable flow channels 54. It should be noted that the insulating coolant mentioned here may refer to coolants such as silicone oil, electronic fluorinated liquid, perfluoropolyether grease, perfluoropolyether lubricating oil, etc. The extension direction of the first flow channel 31 and the second flow channel 32 are parallel to the length direction of the insulating bushing 3, and the bottom of the first flow channel 31 and the second flow channel 32 are provided with through holes (not shown in the figure) so that one end of the positive terminal 41 and the negative terminal 42 can pass through the first flow channel 31 and the second flow channel 32 respectively, and then be electrically connected to the terminals in the charging seat of the car.

[0039] In this embodiment, in order to enable the insulating coolant to flow in the charging cable 5, the charging cable 5 includes a plurality of wire cores 51 connected to the positive terminal 41 and the negative terminal 42, a plurality of wire tubes 52 arranged outside the plurality of wire cores 51, and an insulating layer 53 wrapped around the plurality of wire tubes 52, wherein a plurality of cable flow channels 54 are formed between the plurality of wire cores 51 and the plurality of wire tubes 52 to ensure that the insulating coolant can flow in the charging cable 5 driven by the cooling pump.

[0040] Further, in order to allow the insulating coolant to circulate in the cooling circuit to remove the heat generated by the positive terminal 41 and the negative terminal 42, preferably, the number of the wire cores 51 and the wire tubes 52 are both even numbers. In this embodiment, the number of the wire cores 51 and the wire tubes 52 are both four, and a total of four cable inner flow channels 54 are formed between the four wire cores 51 and the four wire tubes 52. The four cable inner flow channels 54 can be respectively referred to as the first liquid inlet flow channel 54a, the first liquid outlet flow channel 54b, the second liquid inlet flow channel 54c, and the second liquid outlet flow channel 54d, wherein the first liquid inlet flow channel 54a and the first liquid outlet flow channel 54b are connected to the first flow channel 31, and the second liquid inlet flow channel 54c and the second liquid outlet flow channel 54d are connected to the second flow channel 32. It is worth mentioning that two of the four wire cores 51 are connected to the positive terminal 41, and the two wire cores 51 are used to input current to the positive terminal 41, and the remaining two wire cores 51 are connected to the negative terminal 42, and the remaining two wire cores 51 are used to output current from the negative terminal 42, that is, the positive terminal 41 and the negative terminal 42 of the charging gun each have two wire cores 51 to carry current. In this way, when the insulating coolant is driven by the cooling pump and injected into the first flow channel 31 and the second flow channel 32 through the first liquid inlet flow channel 54a and the second liquid inlet flow channel 54c respectively, and is respectively discharged from the first flow channel 31 and the second flow channel 32 through the first liquid outlet flow channel 54b and the second liquid outlet flow channel 54d, the positive terminal 41 in the first flow channel 31 and the negative terminal 42 in the second flow channel 32 can be effectively cooled, which is beneficial to timely reduce the temperature of the charging terminal.

[0041] Furthermore, if Figure 2 , Figure 3 and Figure 5 As shown, in order to ensure that the insulating coolant can flow smoothly in the first flow channel 31 and the second flow channel 32 through the cable inner flow channel 54, the liquid-cooled charging gun also includes a cable outlet nozzle 6 and a cable inlet nozzle 7 connected between the insulating bushing 3 and the multiple wire tubes 52. Specifically, the cable outlet nozzle 6 is tubular and has a cable outlet flow channel (not shown) extending along the length direction of the cable outlet nozzle 6; the cable inlet nozzle 7 is also tubular and has a cable inlet flow channel (not shown) extending along the length direction of the cable inlet nozzle 7. The wire tube 52 of the charging cable 5 can be sleeved on the outer surface of the end of the cable outlet nozzle 6 and the cable inlet nozzle 7 extending toward the charging cable 5, and the corresponding wire core 51 can pass through the cable outlet flow channel and the cable inlet flow channel and extend into the first flow channel 31 and the second flow channel 32, and then connect to the corresponding positive terminal 41 or negative terminal 42. In this way, the insulating coolant in the charging cable 5 is easily injected into and discharged from the charging gun, and the heat generated by the positive terminal 41 and the negative terminal 42 is taken away.

[0042] In some embodiments, the number of cable liquid outlet nozzles 6 and cable liquid inlet nozzles 7 can be multiple. In the present embodiment, the number of cable liquid outlet nozzles 6 and cable liquid inlet nozzles 7 are both two. The cable liquid outlet channels of the two cable liquid outlet nozzles 6 are respectively connected to the first liquid inlet channel 54a and the second liquid inlet channel 54c to inject insulating coolant into the first channel 31 and the second channel 32. The cable liquid inlet channels of the two cable liquid inlet nozzles 7 are respectively connected to the first liquid outlet channel 54b and the second liquid outlet channel 54d to drain the insulating coolant in the first channel 31 and the second channel 32.

[0043] Furthermore, in order to limit the installation depth of the two cable liquid outlet nozzles 6 and the two cable liquid inlet nozzles 7 in the first flow channel 31 and the second flow channel 32, the cable liquid outlet nozzle 6 includes a first abutment flange (not shown), and the cable liquid inlet nozzle 7 includes a second abutment flange (not shown). The first abutment flange and the second abutment flange are respectively used to abut against the edge of the opening of the first flow channel 31 or the second flow channel 32 close to one end of the charging cable 5 to limit the installation depth of the cable liquid outlet nozzle 6 and the cable liquid inlet nozzle 7.

[0044] like Figure 5 As shown, in order to prevent the leakage of insulating coolant under the action of hydraulic pressure, the liquid-cooled charging gun also includes a sealing ring 9, which is arranged in the insulating bushing 3 to avoid cooling failure caused by leakage of insulating coolant. Specifically, the sealing ring 9 includes a first sealing ring 91, a second sealing ring 92 and a third sealing ring 93, wherein the first sealing ring 91 and the second sealing ring 92 are both embedded between the insulating bushing 3 and the positive terminal 41 or the negative terminal 42, and are located at the same end of the insulating bushing 3; the third sealing ring 93 is embedded between the insulating bushing 3, the cable liquid outlet nozzle 6 and the cable liquid inlet nozzle 7, and along the length direction of the insulating bushing 3, the third sealing ring 93 is arranged relative to the first sealing ring 91 and the second sealing ring 92 to form a multi-channel sealing structure.

[0045] In some implementations, the number of the first sealing ring 91 , the second sealing ring 92 , and the third sealing ring 93 may be multiple. In this embodiment, the number of the first sealing ring 91 , the second sealing ring 92 , and the third sealing ring 93 are all two.

[0046] like Figure 2 As shown, in order to prevent the liquid-cooled charging gun and the charging base of the car from loosening and slipping due to poor contact, the liquid-cooled charging gun also includes a suction cup assembly 8 arranged in the gun housing 2. It should be noted that the suction cup assembly 8 is magnetic, and compared with the mechanical locking mechanism in the traditional charging gun, the locking stability is better.

[0047] Specifically, the suction cup assembly 8 includes a lock hook 81, a suction block 82, a suction cup 83, an elastic element 84, a first micro switch (not shown) and a second micro switch (not shown), wherein the lock hook 81 is hinged to the gun housing 2, the suction block 82 is fixed at the bottom of the lock hook 81, the suction cup 83 is fixed in the gun housing 2 and is aligned with the suction block 82 in the vertical direction, the elastic element 84 abuts between the gun housing 2 and the lock hook 81, and the first micro switch and the second micro switch are both arranged at the bottom of the lock hook 81 in the vertical direction. Specifically, as Figure 6 As shown, the lock hook 81 is in the shape of a long-handled hook, and includes a lock hook portion 81a, a magnetic portion 81b, a hinge portion 81c and a pressing portion 81d connected in sequence, wherein the lock hook portion 81a is located at one end of the lock hook 81, and one end of the lock hook portion 81a protrudes out of the gun housing 2 and is located above the gun head 1 so as to be engaged with the charging seat on the external new energy vehicle; the magnetic portion 81b is located in the middle of the lock hook 81, for installing the suction block 82 and pressing the first micro switch; the hinge portion 81c is also located in the middle of the lock hook 81, for being hinged to the gun housing 2 through a pin; the pressing portion 81d is located at the other end of the lock hook 81, for abutting against the elastic element 84 and pressing the second micro switch. When the user presses down the pressing part 81d, the elastic element 84 contracts, and under the action of the pivot connection between the hinge part 81c and the gun housing 2, the lock hook part 81a and the magnetic part 81b rotate upward to lift, so that the lock hook part 81a is connected to the charging seat. Then, the suction cup 83 is energized to generate magnetic attraction to the suction block 82 and drive the lock hook 81 to rotate downward, so as to improve the stability of the lock between the lock hook part 81a and the charging seat. At the same time, when the magnetic part 81b rotates downward, it will touch and start the first micro switch to feedback the connection confirmation signal between the charging gun and the charging seat, so as to close the circuit and start charging. When charging is completed, pressing the pressing part 81d downward will touch and start the second micro switch to feedback the disconnection signal between the charging gun and the charging seat and turn on the power-off mode, so as to pull the charging gun out of the charging seat.

[0048] like Figure 2 As shown, in this embodiment, in order to facilitate the installation of the suction cup assembly 8, the gun housing 2 includes a gun body 21 and an upper cover 22 installed on the gun body 21. The interior of the gun body 21 is hollow, and the top is separated to form a receiving cavity 21a with an opening facing upward. The bottom of the upper cover 22 is provided with a receiving groove 22a opposite to the opening of the receiving cavity 21a, which is not only convenient for installing the suction cup assembly 8, but also beneficial for ensuring the rotational activity space of the lock hook 81 in the vertical direction. Specifically, the upper cover 22 covers the upper opening of the receiving cavity 21a and is detachably fixedly connected to the gun body 21 through a threaded connection.

[0049] like Figure 1 and Figure 2As shown, in order to prevent the charging cable 5 from being loose in the gun case 2, a tail cover 10 is installed between the charging cable 5 and the gun body 21, and the tail cover 10 includes an upper clamp 10a fixedly connected to the gun body 21, a lower clamp 10b opposite to the upper clamp 10a, and a fixing sleeve 10c connected between the upper clamp 10a and the lower clamp 10b. When one end of the charging cable 5 is inserted into the gun case 2, the front end of the charging cable 5 is electrically connected to the terminal assembly 4, and the rear end of the charging cable 5 extends out of the gun case 2 and the fixing sleeve 10c of the tail cover 10 and is then connected to the external power supply device. Then, the upper clamp 10a and the lower clamp 10b are installed on the outer surface of the fixing sleeve 10c and fixed to the gun body 21 by screws, which is beneficial to ensure that the charging cable 5 in the gun case 2 is fixed.

[0050] In this embodiment, a grip portion is further provided on the upper portion of the gun body 21 of the gun housing 2 to facilitate the user to hold the charging gun, and an anti-slip pattern may be provided thereon to increase the friction when holding and prevent slipping.

[0051] Furthermore, in order to prevent water seepage due to poor sealing of the charging gun from affecting the functions of internal electronic components, a gun head sealing ring is provided at the connection between the gun head 1 and the gun body 21 to improve the sealing between the gun head 1 and the gun body 21, and a sealing strip can also be provided at the connection between the upper cover 22 and the gun body 21 to improve the sealing between the upper cover 22 and the gun body 21.

[0052] Furthermore, in order to improve the sealing performance of the charging gun, in some embodiments, rubber coating can be respectively provided on the outer surfaces of the upper cover 22 and the gun body 21, which can not only prevent the leakage of the insulating coolant used to cool the positive terminal 41 and the negative terminal 42, but also help to avoid the influence of external liquid on the functions of the electronic components inside the charging gun. Preferably, the rubber coating is made of plastic or silicone rubber.

[0053] Compared with the prior art, the utility model has the following beneficial effects:

[0054] The utility model provides an insulating coolant flow channel for cooling the positive terminal 41 and the negative terminal 42 in the insulating bushing 3, and matches it with the inner cable flow channel 54 in the charging cable 5, so that the positive terminal 41 and the negative terminal 42 can be in direct contact with the insulating coolant, which is not only beneficial to reduce the temperature of the charging terminal, but also beneficial to avoid the situation where charging is interrupted due to excessive temperature of the charging terminal.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model shall be subject to the attached claims.

Claims

1. A liquid-cooled charging gun, characterized in that: The invention comprises a gun head (1), a gun housing (2), an insulating bushing (3), a terminal assembly (4) and a charging cable (5), wherein the gun head (1) is arranged at the end of the gun housing (2), the insulating bushing (3) is embedded in the gun head (1), the terminal assembly (4) is arranged in the insulating bushing (3), one end of the charging cable (5) is arranged in the gun housing (2) and is electrically connected to the terminal assembly (4), the terminal assembly (4) comprises a positive terminal (41) and a negative terminal (42), a plurality of cable inner flow channels (54) are arranged in the charging cable (5), and a first flow channel (31) and a second flow channel (32) are arranged in the insulating bushing (3) for insulating coolant to flow to cool the positive terminal (41) and the negative terminal (42), and the first flow channel (31) and the second flow channel (32) are respectively connected to the corresponding cable inner flow channels (54).

2. The liquid-cooled charging gun according to claim 1, characterized in that: The charging cable (5) comprises a plurality of wire cores (51) connected to the positive terminal (41) and the negative terminal (42), a plurality of wire tubes (52) arranged outside the plurality of wire cores (51), and an insulating layer (53) wrapped around the plurality of wire tubes (52), and the cable inner flow channel (54) is formed between the plurality of wire cores (51) and the plurality of wire tubes (52).

3. The liquid-cooled charging gun according to claim 1, characterized in that: The cable inner flow channel (54) comprises a first liquid inlet flow channel (54a), a first liquid outlet flow channel (54b), a second liquid inlet flow channel (54c) and a second liquid outlet flow channel (54d); the first liquid inlet flow channel (54a) and the first liquid outlet flow channel (54b) are connected to the first flow channel (31); the second liquid inlet flow channel (54c) and the second liquid outlet flow channel (54d) are connected to the second flow channel (32).

4. The liquid-cooled charging gun according to claim 2, characterized in that: The liquid-cooled charging gun also includes a cable liquid outlet nozzle (6) and a cable liquid inlet nozzle (7) connected between the insulating bushing (3) and the plurality of wire tubes (52).

5. The liquid-cooled charging gun according to claim 1, characterized in that: The liquid-cooled charging gun also includes a magnetic suction cup assembly (8) disposed in the gun housing (2) and used for snapping onto a charging seat of a car.

6. The liquid-cooled charging gun according to claim 5, characterized in that: The suction cup assembly (8) comprises a locking hook (81) hinged to the gun housing (2), wherein a first end of the locking hook (81) extends out of the gun housing (2) and can be rotated upwards and then downwards relative to the gun housing (2) to be inserted into the charging seat.

7. The liquid-cooled charging gun according to claim 6, characterized in that: The suction cup assembly (8) further comprises a suction cup (83) fixed in the gun housing (2), and the suction cup (83) can attract the locking hook (81) to rotate downward after the locking hook (81) rotates upward.

8. The liquid-cooled charging gun according to claim 7, characterized in that: The locking hook (81) is provided with a suction block (82), and the suction block (82) is located above the suction cup (83) and can attract the suction cup (83).

9. The liquid-cooled charging gun according to claim 6, characterized in that: The suction cup assembly (8) further comprises an elastic element (84), wherein the elastic element (84) is arranged between the gun housing (2) and the second end of the locking hook (81), and provides a restoring force after the second end of the locking hook (81) is pressed.

10. The liquid-cooled charging gun according to claim 6, characterized in that: The suction cup assembly (8) further comprises a first micro switch arranged at a first end close to the locking hook (81), and a second micro switch arranged at a second end of the locking hook (81).

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