Terminal assembly and charging gun

Abstract

This utility model belongs to the field of charging gun technology, and discloses a terminal assembly and a charging gun. The terminal assembly includes conductive terminals, cables, and a cooling structure. The cable is electrically connected to one end of the conductive terminal. The cooling structure includes an integral cooling cavity and a connecting part. The connecting part is disposed on one side of the cooling cavity. The cooling cavity is sleeved over at least a portion of the conductive terminals and at least a portion of the cable, with one end of the cooling cavity connected to the conductive terminal and the other end connected to the cable. The cooling structure has a first cooling channel. One opening of the first cooling channel is located on the inner wall of the cooling cavity, and the other opening is located at the connecting part. The first cooling channel is inclined relative to the extending direction of the cooling cavity. The terminal assembly and charging gun provided by this utility model have high sealing performance, reducing the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of charging gun technology, and in particular to a terminal assembly and a charging gun. Background Technology

[0002] New energy electric vehicles need to be charged via a charging gun. The charging gun has conductive terminals and cables electrically connected to the conductive terminals. The conductive terminals are inserted into the slots of the charging port of the new energy electric vehicle to start charging. In order to improve charging efficiency, the power of the charging gun is usually relatively large. The cables with large overload current generate a lot of heat. In order to avoid excessive temperature rise of the cables, liquid cooling is usually used to cool the cables.

[0003] In related technologies, a significant amount of heat is generated at the point where the conductive terminal connects to the cable, necessitating the flow of coolant through this connection. For example, a cooling chamber is installed at the connection point, surrounding part of the conductive terminal and part of the cable, with a cooling gap containing coolant to cool the connection. The cooling chamber's inlet is connected to a connector for connecting cooling pipes. However, the connections between the connector and the cooling chamber, as well as between the connector and the cooling pipes, are detachable, leading to a high risk of leakage in the charging gun and indicating room for improvement. Utility Model Content

[0004] The first objective of this invention is to provide a terminal assembly to solve the technical problems of poor sealing and easy leakage in the prior art.

[0005] The second objective of this invention is to provide a charging gun with high sealing performance and good cooling effect.

[0006] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0007] Conductive terminals;

[0008] A cable is electrically connected to one end of the conductive terminal;

[0009] A cooling structure includes an integral cooling cavity and a connecting portion. The connecting portion is disposed on one side of the cooling cavity. The cooling cavity is sleeved over at least a portion of the conductive terminals and at least a portion of the cable. One end of the cooling cavity is connected to the conductive terminals, and the other end is connected to the cable. The cooling structure has a first cooling channel. One opening of the first cooling channel is located on the inner wall of the cooling cavity, and the other opening of the first cooling channel is located on the connecting portion. The first cooling channel is inclined relative to the extending direction of the cooling cavity.

[0010] In one embodiment, the first cooling channel is located on the inner wall of the cooling cavity, and the channel opening faces the conductive terminal and / or the cable core.

[0011] In one embodiment, the first cooling channel is arranged radially inclined relative to the cooling cavity.

[0012] In one embodiment, a first end of the cooling cavity is connected to the conductive terminal, and a second end of the cooling cavity is connected to the cable;

[0013] The distance between the end of the first cooling channel near the first end and the axis of the cooling cavity is the first distance, and the distance between the end of the first cooling channel near the second end and the axis of the cooling cavity is the second distance, wherein the first distance is less than the second distance.

[0014] In one embodiment, the cable is provided with a second cooling channel, which communicates with the interior of the cooling cavity.

[0015] In one embodiment, the connecting portion is provided with a third cooling channel, the extension direction of the third cooling channel being the same as the axial direction of the cooling cavity; the third cooling channel is connected to the first cooling channel.

[0016] In one embodiment, the terminal assembly further includes a cooling pipe, and the connecting portion is provided with an installation port located at one end of the connecting portion away from the conductive terminal in the axial direction of the cooling cavity; the cooling pipe is installed in the installation port and communicates with the first cooling channel.

[0017] A charging gun, including the terminal assembly as described above.

[0018] In one embodiment, the charging gun includes two sets of terminal assemblies, each set of terminal assemblies having a cooling circuit, and the cooling circuits of the two sets of terminal assemblies being independent of each other.

[0019] In one embodiment, the charging gun further includes a cold source, and the first cooling channel, the second cooling channel, the third cooling channel of the terminal assembly, the cooling pipe, and the cold source form the cooling circuit.

[0020] The beneficial effects of this utility model are:

[0021] The terminal assembly provided by this utility model has a cooling structure comprising an integrated cooling cavity and a connecting part. The cooling cavity and the connecting part are not connected by threads or other means. It is only necessary to ensure the sealing of the connection between the cooling cavity and the conductive terminal and the cable. On the one hand, this reduces the assembly difficulty of the terminal assembly; on the other hand, it reduces the risk of leakage of the cooling medium in the cooling cavity, improves the sealing performance of the terminal assembly, and has high reliability.

[0022] The charging gun provided by this utility model has high sealing performance and good cooling effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the terminal assembly provided in an embodiment of the present utility model;

[0025] Figure 2 This is a first cross-sectional view of the terminal assembly provided in this embodiment of the present utility model;

[0026] Figure 3 This is a first structural schematic diagram of the cooling structure provided in this embodiment of the utility model;

[0027] Figure 4 This is a second structural schematic diagram of the cooling structure provided in this embodiment of the utility model;

[0028] Figure 5 This is a second sectional view of the terminal assembly provided in this embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the charging gun provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 10. Terminal assembly; 1. Conductive terminal; 11. Connecting end; 2. Cable; 21. Cable core; 22. Second cooling channel; 221. Large diameter section; 222. Small diameter section; 23. Sleeve; 3. Cooling structure; 31. Cooling cavity; 311. Medium cavity; 32. Connecting part; 321. Third cooling channel; 322. Mounting port; 33. First cooling channel; 331. First channel opening; 332. First channel opening; 34. First end; 35. Second end; 4. Cooling pipe; X, First direction. Detailed Implementation

[0032] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0033] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0037] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0038] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] This embodiment provides a terminal assembly that reduces the risk of leakage and has high sealing performance.

[0041] For example, such as Figures 1 to 6 As shown, the terminal assembly 10 includes a conductive terminal 1, a cable 2, and a cooling structure 3. The conductive terminal 1 is electrically connected to the cable 2 and is fixedly connected by the cooling structure 3 to form a whole.

[0042] In this embodiment, as Figure 1 As shown, one end of cable 2 is electrically connected to one end of conductive terminal 1 to transmit electrical energy. In this embodiment, as... Figure 2 As shown, the end connecting the conductive terminal 1 to the cable 2 is called the connection end 11. The cooling structure 3 includes an integral cooling cavity 31 and a connecting part 32. That is, the cooling cavity 31 and the connecting part 32 are integrally formed structures, rather than being fixedly connected by other means. The cavity inside the cooling cavity 31 is called the medium cavity 311, and the medium cavity 311 contains a cooling medium (specifically, a cooling liquid or a cooling gas). The integral structure of the cooling cavity 31 and the connecting part 32 enables the cooling structure 3 to have high sealing performance and reduce the risk of coolant leakage.

[0043] In this embodiment, the connecting portion 32 is disposed on one side of the cooling cavity 31. The cooling cavity 31 is sleeved over at least a portion of the conductive terminal 1 and at least a portion of the cable 2, such that the position where the conductive terminal 1 and the cable 2 are electrically connected is located inside the medium cavity 311. Furthermore, one end of the cooling cavity 31 is connected to the conductive terminal 1, and the other end of the cooling cavity 31 is connected to the cable 2. In order to improve the sealing performance of the terminal assembly 10, a sealing structure (e.g., a sealing ring) is provided between the inner wall of one end of the cooling cavity 31 and the circumferential outer wall of the conductive terminal 1, and between the inner wall of the other end of the cooling cavity 31 and the circumferential outer wall of the cable 2, so that the conductive terminal 1, the cable 2, and the cooling cavity 31 cooperate to form a sealed medium cavity 311, so that the cooling medium inside the medium cavity 311 will not leak.

[0044] like Figure 2 As shown, the cooling structure 3 is provided with a first cooling channel 33. One outlet of the first cooling channel 33 is located on the inner wall of the cooling cavity 31, and the other outlet of the first cooling channel 33 is located at the connecting part 32. Cooling medium can be input into the medium cavity 311 through the first cooling channel 33, or the cooling medium in the medium cavity 311 can flow out through the first cooling channel 33. This embodiment does not limit this.

[0045] In this embodiment, please continue to refer to Figure 2 The first cooling channel 33 is inclined relative to the extension direction of the cooling cavity 31. This arrangement allows the diameter of the channel opening formed by the first cooling channel 33 on the inner wall of the cooling cavity 31 to be larger, thereby increasing the amount of cooling medium entering the medium cavity 311 and improving the cooling efficiency at the connection between the conductive terminal 1 and the cable 2.

[0046] It should be noted that, as Figure 2 As shown, the extension direction of the cooling cavity 31 is referred to as the first direction X. The first cooling channel 33 is inclined relative to the extension direction of the cooling cavity 31, which means that the axial direction of the first cooling channel 33 is inclined relative to the first direction X, rather than being the same as the first direction X.

[0047] The terminal assembly 10 provided in this embodiment includes a cooling structure 3 comprising an integral cooling cavity 31 and a connecting part 32. The cooling cavity 31 and the connecting part 32 are not connected by threads or other means. It is only necessary to ensure the sealing of the connection between the cooling cavity 31 and the conductive terminal 1 and the cable 2. On the one hand, this reduces the assembly difficulty of the terminal assembly 10; on the other hand, it reduces the risk of leakage of the cooling medium in the cooling cavity 31, improves the sealing performance of the terminal assembly 10, and has high reliability.

[0048] Furthermore, by placing the connecting part 32 on one side of the cooling cavity 31, the placement of the connecting part 32 will not interfere with the connection between the cooling cavity 31 and the conductive terminal 1 and the connecting part 32, making the overall structure of the terminal assembly 10 more reasonable.

[0049] In addition, by providing a first cooling channel 33 that is inclined relative to the extension direction of the cooling cavity 31, the cooling structure 3 can have a larger area of ​​the channel opening formed by the first cooling channel 33 on the inner wall of the cooling cavity 31, thereby improving the cooling efficiency.

[0050] Furthermore, in this embodiment, the connection between the conductive terminal 1 and the cable 2 in the terminal assembly 10 is immersed in the cooling medium of the cooling chamber 31, which enables the cooling medium to directly dissipate heat from the conductive terminal 1 and the cable 2, which are power conductors. This can efficiently remove the heat generated by the high current in the conductive terminal 1 and the cable 2, effectively avoiding the risk of high-temperature fires caused by heat.

[0051] In at least one implementation, such as Figure 2 As shown, the first cooling channel 33 is located on the inner wall of the cooling cavity 31, with its channel opening facing the conductive terminal 1. In this embodiment, as... Figure 3 and Figure 4 As shown, the channel opening of the first cooling channel 33 on the inner wall of the cooling cavity 31 is called the first channel opening 332, and the channel opening of the first cooling channel 33 on the connecting part 32 is called the second channel opening. By setting the first channel opening 332 to face the conductive terminal 1, the cooling medium entering the medium cavity 311 through the first channel opening 332 can contact the conductive terminal 1, thereby effectively removing the heat from the conductive terminal 1.

[0052] In other embodiments, the opening of the first cooling channel 33 located on the inner wall of the cooling cavity 31 may also face the cable core 21 of the cable 2.

[0053] It is understandable that the flow channel 33 located on the inner wall of the cooling cavity 31 can be oriented with part of it facing the conductive terminal 1 and the other part facing the cable core 21 of the cable 2, so as to remove the heat from the conductive terminal 1 and the cable core 21.

[0054] In at least one embodiment, such as Figure 2As shown, the first cooling channel 33 is radially inclined relative to the cooling cavity 31. That is, the extension direction of the first cooling channel 33 is not perpendicular to the extension direction of the cooling cavity 31 (i.e., the first direction X), but forms an angle with the radial direction of the cooling cavity 31. Normally, the extension direction of the conductive terminal 1, the extension direction of the cooling cavity 31, and the extension direction of the cable 2 within the cooling cavity 31 are the same, so as to make full use of the space within the cooling cavity 31. By radially inclining the first cooling channel 33 relative to the cooling cavity 31, the extension direction of the first cooling channel 33 is not perpendicular to the portions of the conductive terminal 1 and the cable 2 within the cooling cavity 31. Consequently, the cooling medium flowing out of the first cooling channel 33 will not rush perpendicularly to the conductive terminal 1 and the cable 2, but will rush to the conductive terminal 1 and the cable 2 at a certain angle. This reduces the resistance of the cooling medium to the conductive terminal 1 and the cable 2, and also reduces the impact on the connection between the conductive terminal 1 and the cable 2, ensuring the connection strength of the conductive terminal 1 and the cable 2.

[0055] It should be noted that the radial direction of the cooling cavity 31 is perpendicular to the first direction X.

[0056] In one embodiment, such as Figure 5 As shown, the cooling cavity 31 has a first end 34 and a second end 35, which are arranged opposite to each other in the axial direction of the cooling cavity 31. The first end 34 of the cooling cavity 31 is connected to the conductive terminal 1, and the second end 35 of the cooling cavity 31 is connected to the cable 2.

[0057] Please continue reading Figure 5 The distance between the end of the first cooling channel 33 near the first end 34 and the axis of the cooling cavity 31 is a first distance d1, and the distance between the end of the first cooling channel 33 near the second end 35 and the axis of the cooling cavity 31 is a second distance d2. The first distance d1 is less than the second distance d2. With this configuration, the cooling medium entering the cooling cavity 31 through the first cooling channel 33 flows towards the first end 34 of the cooling cavity 31, thereby effectively cooling the conductive terminal 1, removing heat from the conductive terminal 1, and reducing the risk of cooling blind spots. Since the outlet of the cooling medium in the cooling cavity 31 is usually located near the cable 2, by setting the inclination direction of the first cooling channel 33 to satisfy the above relationship, the cooling medium entering the cooling cavity 31 first cools the conductive terminal 1, then cools the connection between the conductive terminal 1 and the cable 2, and finally cools the cable 2 before flowing out from the outlet.

[0058] Optionally, the first distance d1 can be the distance between the center of the first flow channel 332 and the axis of the cooling cavity 31. The second distance d2 can be the distance between the center of the second flow channel and the axis of the cooling cavity 31.

[0059] To improve the utilization rate of the cooling medium, in at least some possible embodiments, the cable 2 is provided with a second cooling channel 22, which is connected to the interior of the cooling cavity 31 (i.e., the medium cavity 311). This allows the cooling medium in the medium cavity 311 to enter the second cooling channel 22, or vice versa. By providing the second cooling channel 22, the first cooling channel 33, the medium cavity 311, and the second cooling channel 22 can form a cooling circuit. The cooling medium can flow through the second cooling channel 22 to the cold source, making full use of the cooling medium, improving the utilization rate of the cable 2, and also cooling the cable core 21 of the cable 2, thus providing more comprehensive functions.

[0060] It should be noted that the second cooling channel 22 can also be called a sandwich channel, for example, as shown in... Figure 2 As shown, the cable 2 includes a cable core 21 and a sheath 23 covering the cable core 21, with a second cooling channel 22 formed between the sheath 23 and the cable core 21. In this embodiment, the cooling cavity 31 is sealed to the sheath 23, and the connection method can refer to the prior art, such as by means of clamps, etc., but this embodiment does not limit it.

[0061] In at least one implementation, such as Figure 2 As shown, the second cooling channel 22 includes a large-diameter section 221 and a small-diameter section, with the flow area of ​​the large-diameter section 221 being larger than that of the small-diameter section 222. The large-diameter section 221 is located within the cooling cavity 31, and the cooling medium in the medium cavity 311 enters the small-diameter section 222 after passing through the large-diameter section 221. The large-diameter section 221 can serve as a transition structure between the medium cavity 311 and the small-diameter section 222, forming a structure with a gradually decreasing flow area, thus reducing the risk of eddy currents.

[0062] In one possible implementation, such as Figure 2 As shown, the connecting portion 32 is provided with a third cooling channel 321, the extension direction of which is the same as the axial direction of the cooling cavity 31. The third cooling channel 321 communicates with the first cooling channel 33 for supplying cooling medium flow. The third cooling channel 321 is also used to communicate with the cooling pipe 4. By aligning the extension direction of the third cooling channel 321 with the axial direction of the cooling cavity 31, the extension direction of the portion of the cooling pipe 4 connected to the connecting portion 32 can be the same as the extension direction of the cooling cavity 31. This reduces the radial dimension of the entire terminal assembly 10, allowing for a smaller radial dimension of the charging gun using the terminal assembly 10, thus meeting application requirements.

[0063] In at least one possible implementation, such as Figure 1 and Figure 2As shown, the terminal assembly 10 also includes a cooling conduit 4. (As indicated...) Figure 3 As shown, the connecting part 32 is provided with a mounting port 322, which is located at the end of the connecting part 32 facing away from the conductive terminal 1 in the axial direction of the cooling cavity 31. Figure 2 In this configuration, the mounting port 322 is located on the end face of the connecting portion 32 opposite to the conductive terminal 1. For example... Figure 1 or Figure 2 As shown, the cooling pipe 4 is installed in the mounting port 322 and communicates with the first cooling channel 33. With this configuration, the cooling pipe 4 extends in a direction away from the conductive terminal 1, so that the cooling pipe 4 does not extend to the conductive terminal 1, thereby not interfering with the insertion and mating of the conductive terminal 1 and the electronic device socket. It also allows the length of the cooling pipe 4 to be shorter. In addition, the extension direction of the cooling pipe 4 can be consistent with the extension direction of the cable 2, which makes it easier to wrap the cable 2 and the cooling pipe 4 together.

[0064] It should be noted that when the connecting part 32 is provided with a third cooling channel 321, the third cooling channel 321 is connected to the cooling pipe 4. For example, the third cooling channel 321 is coaxially arranged with the mounting port 322.

[0065] Optionally, the end of the cooling pipe 4 away from the connection part 32 can be connected to and communicate with a cold source; this embodiment does not limit this.

[0066] In this embodiment, the cold source, cooling pipe 4, third cooling channel 321, first cooling channel 33, medium cavity 311, second cooling channel 22, and cold source form a cooling circuit. Exemplarily, the flow of the cooling medium is described using the first channel opening 332 as the inlet of the cooling cavity 31. The cooling medium from the cold source outlet flows through the cooling pipe to the third cooling channel 321. The third cooling channel 321 enters the first cooling channel 33 through the second channel opening, and the flow direction changes. Since the angle between the third cooling channel 321 and the first cooling channel 33 is greater than 90°, the pressure loss caused by the change in direction can be reduced. The cooling medium in the first cooling channel 33 enters the medium cavity 311 through the first channel opening 332. The cooling medium in the medium cavity 311 first flows to the first end 34 of the cooling cavity 31 and rushes towards the conductive terminal 1. Then it flows back through the connection between the conductive terminal 1 and the cable 2, and then enters the small diameter section 222 after passing through the large diameter section 221. From the small diameter section 222, it flows to the inlet of the cold source to form a cooling circuit.

[0067] This embodiment also provides a charging gun with high sealing performance and good cooling effect.

[0068] For example, such as Figure 6As shown, the charging gun includes the terminal assembly 10 described above. When the charging gun is plugged into an electronic device (such as a new energy vehicle), the conductive terminal 1 is inserted into the socket.

[0069] In some alternative embodiments, such as Figure 6 As shown, the charging gun includes two sets of terminal assemblies 10, each with its own cooling circuit. The cooling circuits of the two sets of terminal assemblies 10 are independent of each other. With this configuration, the cooling structure 3 of the charging gun is a two-inlet, two-outlet structure, which allows each terminal assembly 10 to have a relatively independent cooling circuit. This reduces the risk of uneven distribution of the cooling medium and ensures a more balanced cooling effect for the two terminal assemblies 10.

[0070] For example, in this embodiment, one of the conductive terminals 1 in the two terminal assemblies 10 is a positive terminal and the other is a negative terminal.

[0071] In at least one possible implementation, the charging gun also includes a cold source. The first cooling channel 33, the second cooling channel 22, the third cooling channel 321, the cooling pipe 4, and the cold source of the terminal assembly 10 form a cooling circuit.

[0072] It is understood that the charging gun may also include other components, which can be referred to in the prior art, and will not be described in detail in this embodiment.

[0073] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A terminal assembly characterized by, include: Conductive terminals; A cable is electrically connected to one end of the conductive terminal; A cooling structure includes an integral cooling cavity and a connecting portion. The connecting portion is disposed on one side of the cooling cavity. The cooling cavity is sleeved over at least a portion of the conductive terminals and at least a portion of the cable. One end of the cooling cavity is connected to the conductive terminals, and the other end is connected to the cable. The cooling structure has a first cooling channel. One opening of the first cooling channel is located on the inner wall of the cooling cavity, and the other opening of the first cooling channel is located on the connecting portion. The first cooling channel is inclined relative to the extending direction of the cooling cavity.

2. The terminal assembly of claim 1, wherein, The first cooling channel is located on the inner wall of the cooling cavity, and the channel opening faces the conductive terminal and / or the cable core.

3. The terminal assembly of claim 1, wherein, The first cooling channel is arranged radially inclined relative to the cooling cavity.

4. The terminal assembly of claim 1, wherein The first end of the cooling cavity is connected to the conductive terminal, and the second end of the cooling cavity is connected to the cable; The distance between the end of the first cooling channel near the first end and the axis of the cooling cavity is the first distance, and the distance between the end of the first cooling channel near the second end and the axis of the cooling cavity is the second distance, wherein the first distance is less than the second distance.

5. The terminal assembly of claim 1, wherein, The cable is provided with a second cooling channel, which is connected to the interior of the cooling cavity.

6. The terminal assembly of claim 1, wherein, The connecting part is provided with a third cooling channel, and the extension direction of the third cooling channel is the same as the axial direction of the cooling cavity; the third cooling channel is connected to the first cooling channel.

7. The terminal assembly of claim 1, wherein The terminal assembly further includes a cooling pipe, and the connecting part is provided with an installation port, which is located at the end of the connecting part opposite to the conductive terminal in the axial direction of the cooling cavity; the cooling pipe is installed in the installation port and communicates with the first cooling channel.

8. A charging gun characterized by, Includes the terminal assembly as described in any one of claims 1-7.

9. The charging gun of claim 8, wherein, The charging gun includes two sets of terminal assemblies, each set of terminal assemblies having a cooling circuit, and the cooling circuits of the two sets of terminal assemblies are independent of each other.

10. The charging gun of claim 9, wherein, The charging gun also includes a cold source, and the first cooling channel, second cooling channel, third cooling channel, cooling pipe and the cold source of the terminal assembly form the cooling circuit.

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