Terminal cable assembly and charging gun

Abstract

The invention belongs to the technical field of charging guns, and discloses a terminal cable assembly and a charging gun, and the terminal cable assembly comprises a conductive terminal, a cooling cavity, a joint structure and a liquid cooling cable. One end of the cooling cavity is hermetically sleeved on the conductive terminal, and the connecting end is positioned in the cooling cavity; the joint structure is hermetically connected with the other end of the cooling cavity; the liquid cooling cable comprises a cable conductor and a cable jacket which is arranged outside the cable conductor in a surrounding manner and forms a cable cooling channel with the cable conductor, one end of the cable conductor penetrates through the joint structure and is electrically connected with the connecting end, the cable jacket is in sealed connection with the joint structure, and the cable cooling channel is communicated with the interior of the cooling cavity through the joint structure; and cooling media are arranged in the cable cooling channel and the cooling cavity. According to the terminal cable assembly and the charging gun provided by the invention, the risk that the temperature is too high during high-charging-power charging can be reduced, the charging duration is shortened, and the charging efficiency is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of charging guns, and in particular to a terminal cable assembly and a charging gun. Background Art

[0002] New energy electric vehicles need to be charged through a charging gun, which has a conductive terminal and a cable electrically connected to the conductive terminal. The conductive terminal is inserted into the slot of the charging port of the new energy electric vehicle for charging. In order to improve the charging efficiency, the power of the charging gun is usually large, and the cable with a large overload current generates a lot of heat. In order to avoid excessive temperature rise of the cable, liquid cooling is usually used to cool the cable.

[0003] In the prior art, the cooling of the conductive terminal and the cooling of the cable are two independent cooling systems. A plug is provided at the end of the cable facing the conductive terminal, and the plug is used to prevent the coolant inside the cable from leaking. The conductive terminal is cooled by a cooling pipeline arranged on its periphery. The core of the cable is electrically connected to a conductor, and the conductor is electrically connected to the conductive terminal after extending from the plug to achieve electrical connection between the cable and the conductive terminal. Since a large amount of heat is generated at the part where the conductor contacts the conductive terminal, and no cooling structure is provided at this part, the temperature at the conductor and the conductive terminal is too high, which in turn affects the charging efficiency of the charging gun and prolongs the charging time. Summary of the invention

[0004] The object of the present invention is to provide a terminal cable assembly and a charging gun to solve the technical problems of low charging efficiency and long charging time existing in the prior art.

[0005] As conceived above, the technical solution adopted by the present invention is:

[0006] Terminal cable assembly, including:

[0007] A conductive terminal having a connecting end;

[0008] A cooling cavity, one end of which is sealed and sleeved on the conductive terminal, and the connecting end is located in the cooling cavity;

[0009] A joint structure, wherein the joint structure is sealed and connected to the other end of the cooling cavity;

[0010] A liquid-cooled cable comprises a cable conductor and a cable jacket which is arranged outside the cable conductor and forms a cable cooling channel between the cable conductor, one end of the cable conductor passes through the joint structure and is electrically connected to the connecting end, the cable jacket is sealedly connected to the joint structure, and the cable cooling channel is connected to the inside of the cooling cavity through the joint structure, and there is a cooling medium in both the cable cooling channel and the cooling cavity.

[0011] In one embodiment, the cooling cavity is sealingly sleeved on one end of the joint structure, and the cable jacket is sealingly sleeved on the other end of the joint structure.

[0012] In one embodiment, the joint structure includes a large diameter section and a small diameter section, the cross-sectional area of ​​the large diameter section is larger than the cross-sectional area of ​​the small diameter section; the cooling cavity is sealed and sleeved on the large diameter section, and the cable jacket is sealed and sleeved on the small diameter section.

[0013] In one of the embodiments, the terminal cable assembly further includes a hoop, which is sleeved on the cable jacket and cooperates with the small-diameter section to clamp the cable jacket.

[0014] In one of the embodiments, a circumferential outer wall of the small diameter section is provided with a barb structure, and the barb structure is interference fit with the cable jacket.

[0015] In one of the embodiments, the terminal cable assembly further includes a locking nut, the outer wall of the large diameter section outside the cooling cavity is provided with a locking thread, the locking nut is sleeved on the locking thread and abuts against the end face of the cooling cavity.

[0016] In one embodiment, a first limiting structure is provided on the circumferential outer wall of the joint structure, and a second limiting structure is provided at one end of the cooling cavity. The first limiting structure is located in the cooling cavity and abuts against the second limiting structure in the axial direction of the cooling cavity.

[0017] In one embodiment, the conductive terminal is provided with a fastening screw hole, the cooling cavity is provided with a through hole, the fastener is passed through the through hole and screwed into the fastening screw hole to connect the conductive terminal and the cooling cavity.

[0018] In one embodiment, a sealing ring is provided between the conductive terminal and the cooling cavity; and / or a sealing ring is provided between the joint structure and the cooling cavity.

[0019] A charging gun includes the terminal cable assembly as described above.

[0020] The terminal cable assembly and charging gun provided by the present invention have at least the following beneficial effects:

[0021] The cooling cavity is sealed and connected to the conductive terminal and the joint structure to form a sealed cooling space. The connecting end of the conductive terminal is connected to the cable conductor, and the connection position is located in the cooling cavity. On the one hand, there are fewer connection positions when the liquid-cooled cable is electrically connected to the conductive terminal. On the other hand, the cooling medium in the cooling cavity can directly contact and cool the connecting end, the cable conductor and the connection position between the two, thereby improving the cooling efficiency of the terminal cable assembly, avoiding overtemperature, and reducing the impact of temperature on charging power during high-power charging, thereby improving the charging efficiency of the charging gun using the terminal cable assembly and shortening the charging time.

[0022] Furthermore, the liquid cooling cable and the cooling cavity are connected by a joint structure, which improves the connection strength between the cooling cavity and the liquid cooling cable on the one hand; on the other hand, by setting the joint structure, the radial dimension of the cooling cavity can be larger, and there is no need to meet the diameter of the liquid cooling cable, so that there can be more cooling medium in the cooling cavity, further improving the cooling effect on the connection end and one end of the cable conductor. In addition, by setting the joint structure, the connection sealing between the liquid cooling cable and the cooling cavity can also be improved, reducing the problem of cooling medium leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0024] Figure 1 is a first structural schematic diagram of a terminal cable assembly provided by an embodiment of the present invention;

[0025] Figure 2 is a second structural schematic diagram of a terminal cable assembly provided by an embodiment of the present invention;

[0026] Figure 3 is an exploded view of a terminal cable assembly provided by an embodiment of the present invention;

[0027] Figure 4 is a cross-sectional view of a terminal cable assembly provided by an embodiment of the present invention;

[0028] Figure 5 The present invention Figure 4 An enlarged schematic diagram of point A is shown;

[0029] Figure 6 The present invention Figure 4 The enlarged schematic diagram of point B is shown;

[0030] Figure 7 is a structural schematic diagram of a joint structure provided by an embodiment of the present invention;

[0031] Figure 8 is a schematic structural diagram of a cooling cavity provided by an embodiment of the present invention;

[0032] Fig. 9 is a schematic diagram of the structure of a charging gun provided by an embodiment of the present invention;

[0033] Fig.10 It is a partial structural schematic diagram of a charging gun provided in an embodiment of the present invention.

[0034] In the figure:

[0035] 100, conductive terminal; 110, connecting end; 120, plug-in end; 130, fastening screw hole; 200, cooling cavity; 210, second limiting structure; 220, through hole; 230, entrance and exit; 300, joint structure; 310, large diameter section; 311, locking thread; 320, small diameter section; 321, barb structure; 330, first limiting structure; 400, liquid-cooled cable; 410, cable conductor; 411, welding part; 420, cable jacket; 430, cable cooling channel; 500, hoop; 600, locking nut; 700, fastener; 800, sealing ring; 10, terminal cable assembly; 20, head structure; 30, tail structure; 41, main pipeline; 42, branch pipeline; 50, collecting cavity; 60, tee. DETAILED DESCRIPTION

[0036] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, not all.

[0037] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly stipulated and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0041] In the description of this embodiment, 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 other orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0042] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or there may be a central element.

[0043] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0044] This embodiment provides a terminal cable assembly, which is applied to a charging gun, can reduce the risk of overtemperature when charging at a high charging power, shorten the charging time, and ensure the charging efficiency.

[0045] For example, Figures 1 to 10As shown, the terminal cable assembly 10 includes a conductive terminal 100, a cooling cavity 200, a joint structure 300, and a liquid cooling cable 400. The conductive terminal 100 has a connecting end 110 for connecting the liquid cooling cable 400. The conductive terminal 100 also has a plug end 120 for inserting into a charging socket. The cooling cavity 200 is a hollow structure, and one end of the cooling cavity 200 is sealed and sleeved on the conductive terminal 100, as shown in FIG. Figure 4 As shown, the connection end 110 is located in the cooling cavity 200, and the cooling cavity 200 is not sleeved outside the plug end 120. The cooling cavity 200 contains a cooling medium, which is used to cool the connection end 110 to avoid the connection end 110 from being overheated. The joint structure 300 is sealed and connected to the other end of the cooling cavity 200 to connect the cooling cavity 200 and the liquid cooling cable 400.

[0046] like Figure 3 As shown, the liquid-cooled cable 400 includes a cable conductor 410 and a cable jacket 420. The cable jacket 420 is arranged outside the cable conductor 410 and forms a cable cooling channel 430 between the cable conductor 410. The cable cooling channel 430 contains a cooling medium, which is used to cool the cable conductor 410 to avoid the cable conductor 410 from being overheated. One end of the cable conductor 410 passes through the joint structure 300 and extends into the cooling cavity 200, and one end of the cable conductor 410 is electrically connected to the connecting end 110. It can be seen that the cable conductor 410 in this embodiment is directly connected to the connecting end 110 of the conductive terminal 100, rather than being electrically connected to the conductive terminal 100 through other intermediate structures. In addition, one end of the cable conductor 410 is also located in the cooling cavity 200, so that the connection position where the cable conductor 410 is connected to the connecting end 110 is also located in the cooling cavity 200, so that it can be cooled by the cooling medium in the cooling cavity 200.

[0047] In some optional embodiments, one end of the cable conductor 410 is a welding portion 411, and the welding portion 411 is electrically connected to the connection end 110 by ultrasonic welding to have a higher connection strength. In addition, the welding portion 411 and the connection end 110 are both plate-shaped, and the large surface of the welding portion 411 is welded to the large surface of the connection end 110 to have a larger connection area and a higher connection strength.

[0048] The cable jacket 420 in this embodiment is sealed and connected to the joint structure 300, and the cable cooling channel 430 is connected to the inside of the cooling cavity 200 through the joint structure 300. In one embodiment, the joint structure 300 is a hollow structure, the cable cooling channel 430 is connected to the inside of the joint structure 300, and the cooling cavity 200 is also connected to the inside of the joint structure 300. In another embodiment, the joint structure 300 is provided with a channel (not shown in the figure) running through both ends thereof, the cable cooling channel 430 is connected to one end of the channel, and the inside of the cooling cavity 200 is connected to the other end of the channel.

[0049] In the terminal cable assembly 10 provided in this embodiment, the cooling cavity 200 is sealed and connected to the conductive terminal 100 and the joint structure 300 to form a sealed cooling space. The connecting end 110 of the conductive terminal 100 and the cable conductor 410 are connected, and the connecting position is located in the cooling cavity 200. On the one hand, there are fewer connecting positions when the liquid-cooled cable 400 is electrically connected to the conductive terminal 100. On the other hand, the cooling medium in the cooling cavity 200 can directly contact and cool the connecting end 110, the cable conductor 410 and the connecting position between the two, thereby improving the cooling efficiency of the terminal cable assembly 10, avoiding the occurrence of overtemperature, thereby reducing the influence of temperature on the charging power during high-power charging, improving the charging efficiency of the charging gun using the terminal cable assembly 10, and shortening the charging time.

[0050] Furthermore, the liquid cooling cable 400 is connected to the cooling cavity 200 via the joint structure 300, which improves the connection strength between the cooling cavity 200 and the liquid cooling cable 400 on the one hand; on the other hand, by providing the joint structure 300, the radial dimension of the cooling cavity 200 can be larger, without having to cater to the diameter of the liquid cooling cable 400, so that there can be more cooling medium in the cooling cavity 200, further improving the cooling effect on the connection end 110 and one end of the cable conductor 410. In addition, by providing the joint structure 300, the connection sealing between the liquid cooling cable 400 and the cooling cavity 200 can also be improved, reducing the problem of cooling medium leakage.

[0051] In some optional embodiments, the cooling cavity 200 is made of metal. When the cooling cavity 200 is made of metal, on the one hand, the cooling cavity 200 has high structural strength and pressure resistance, and on the other hand, the cooling cavity 200 also has high sealing performance, reducing the risk of cooling medium leakage. Of course, it is understandable that the cooling cavity 200 can also be made of non-metallic material, which is not limited in this embodiment.

[0052] The material of the joint structure 300 in this embodiment can be metal, so that the joint structure 300 has high structural strength and pressure resistance, and has strong sealing performance, reducing the risk of cooling medium leakage. Of course, it can be understood that the material of the joint structure 300 can also be non-metallic material, which is not limited in this embodiment.

[0053] In order to further improve the sealing connection effect between the cooling cavity 200 and the liquid cooling cable 400, in one embodiment, the cooling cavity 200 is sealed and sleeved on one end of the joint structure 300, and the cable jacket 420 is sealed and sleeved on the other end of the joint structure 300. In this way, there can be a large contact area between the cooling cavity 200 and the joint structure 300 to improve the sealing connection effect between the cooling cavity 200 and the joint structure 300. There can also be a large contact area between the cable jacket 420 and the joint structure 300, thereby improving the sealing connection effect between the joint structure 300 and the cable jacket 420.

[0054] It is understandable that one end of the joint structure 300 may be sealed and sleeved on the cooling cavity 200 , and / or the other end of the joint structure 300 may be sealed and sleeved on the cable jacket 420 , which is not limited in this embodiment.

[0055] In order to make the cross-sectional size of the cooling cavity 200 larger, the cross-sectional size of the liquid cooling cable 400 may not be set very large, optionally, as Figure 3 As shown, the joint structure 300 includes a large diameter section 310 and a small diameter section 320. The cross-sectional area of ​​the large diameter section 310 is greater than the cross-sectional area of ​​the small diameter section 320. For example, when the large diameter section 310 and the small diameter section 320 are both cylindrical, the diameter of the large diameter section 310 is greater than the diameter of the small diameter section 320. The cooling cavity 200 is sealed and sleeved on the large diameter section 310, and the cable jacket 420 is sealed and sleeved on the small diameter section 320. By setting the large diameter section 310 and the small diameter section 320 with different radial dimensions, on the basis of ensuring the sealing effect between the joint structure 300 and the cooling cavity 200 and the cable jacket 420, the radial dimension of the cooling cavity 200 is not affected by the cable jacket 420, so that the cooling cavity 200 can be set larger, and the internal space of the cooling cavity 200 is larger, which can accommodate more cooling medium, so as to further improve the cooling efficiency and cooling effect of the connection position between the connection end 110 and the cable conductor 410.

[0056] The pressure of the cooling medium in the cooling cavity 200 and the cable cooling channel 430 is usually relatively high, and when the cooling medium flows from the large diameter section 310 to the small diameter section 320 and the cable cooling channel 430, the connection between the cable jacket 420 and the small diameter section 320 is subjected to a greater pressure due to the reduction in the flow area. In order to prevent the connection between the cable jacket 420 and the small diameter section 320 from failing, in some optional embodiments, such as Figure 2 As shown, the terminal cable assembly 10 further includes a hoop 500. The hoop 500 is sleeved on the cable jacket 420 and cooperates with the small diameter section 320 to clamp the cable jacket 420. By providing the hoop 500, the cable jacket 420 can be clamped on the small diameter section 320, thereby improving the connection strength between the cable jacket 420 and the small diameter section 320, thereby improving the overall pressure resistance of the terminal cable assembly 10, preventing the cable jacket 420 from being separated from the small diameter section 320, and having higher reliability.

[0057] Further optionally, if Figure 6 or Figure 7 As shown, the circumferential outer wall of the small diameter section 320 is provided with a barb structure 321, and the barb structure 321 is interference-fitted with the cable jacket 420, that is, the barb structure 321 is inserted into the inner wall of the cable jacket 420. By providing the barb structure 321 and cooperating with the clamping of the clamp 500, the connection strength between the small diameter section 320 and the cable jacket 420 is further improved, and the risk of separation of the small diameter section 320 and the cable jacket 420 is further reduced.

[0058] Alternatively, if Figure 7 As shown, a plurality of barb structures 321 are provided, and the plurality of barb structures 321 are sequentially arranged along the axial direction of the small-diameter section 320 to further improve the connection strength between the small-diameter section 320 and the cable jacket 420 .

[0059] It should be noted that the material of the cable jacket 420 in this embodiment can be a metal material, a non-metal material, or a combination of a metal jacket and a non-metal jacket, which is not limited in this embodiment.

[0060] In order to prevent the cooling cavity 200 and the large diameter section 310 of the joint structure 300 from moving relative to each other, in one embodiment, as shown in FIG. Figures 3 to 5 As shown, the terminal cable assembly 10 further includes a locking nut 600. The outer wall of the large diameter section 310 located outside the cooling cavity 200 is provided with a locking thread 311, and the locking nut 600 is sleeved on the locking thread 311 and abuts against the end surface of the cooling cavity 200. In this way, the locking nut 600 can limit the cooling cavity 200 to prevent the cooling cavity 200 from moving relative to the large diameter section 310, thereby improving the connection strength between the cooling cavity 200 and the large diameter section 310, thereby ensuring the sealing of the formed cooling space.

[0061] In some other optional embodiments, the locking nut 600 may also be directly welded to the large diameter section 310 , which is not limited in this embodiment.

[0062] In order to improve the connection strength between the conductive terminal 100 and the cooling cavity 200, optionally, as Figure 3 As shown, the conductive terminal 100 is provided with a fastening screw hole 130. Figure 8 As shown, the cooling cavity 200 is provided with a through hole 220. Figure 4 As shown, the terminal cable assembly 10 also includes a fastener 700, which is passed through the through hole 220 and screwed into the fastening screw hole 130 to connect the conductive terminal 100 and the cooling cavity 200, so that the cooling cavity 200 and the conductive terminal 100 will not be relatively displaced in the axial direction of the cooling cavity 200, thereby improving the connection strength between the cooling cavity 200 and the conductive terminal 100, thereby ensuring the sealing of the formed cooling space.

[0063] Optionally, one or more fasteners 700 may be provided. When multiple fasteners 700 are provided, multiple through holes 220 and fastening screw holes 130 are provided in a one-to-one correspondence, so that the strength of connecting the cooling cavity 200 and the conductive terminal 100 can be further improved.

[0064] Exemplarily, the fastener 700 in this embodiment can be a bolt, and the head of the bolt is located in the through hole 220 so as not to interfere with other components, avoid the fastener 700 occupying too much space, and facilitate the miniaturization of the terminal cable assembly 10.

[0065] It should be noted that one end of the cooling cavity 200 is connected to the conductive terminal 100 through a fastener 700, and the other end is locked by a locking nut 600, and the connecting end 110 of the conductive terminal 100 is connected to the welding portion 411 of the cable conductor 410, so that the cooling cavity 200 will not move relative to the conductive terminal 100 and the liquid-cooled cable 400, thereby improving the integrity of the structure formed by the cooling cavity 200, the conductive terminal 100, the joint structure 300 and the liquid-cooled cable 400, thereby reducing the risk of cooling medium leakage.

[0066] In this embodiment, the alignment of the through hole 220 and the fastening screw hole 130 can facilitate the alignment and assembly of the conductive terminal 100 and the cooling cavity 200. In order to facilitate the alignment and assembly of the joint structure 300 and the cooling cavity 200, in one embodiment, as shown in FIG. Figure 5 , Figure 7 and Figure 8 As shown, the circumferential outer wall of the joint structure 300 is provided with a first limiting structure 330, and one end of the cooling cavity 200 is provided with a second limiting structure 210, and the first limiting structure 330 is located in the cooling cavity 200 and abuts against the second limiting structure 210 in the axial direction of the cooling cavity 200. In this way, the cooling cavity 200 and the joint structure 300 can be positioned and installed, so that the length of the joint structure 300 in the cooling cavity 200 meets the requirements, so as to ensure the sealing after the two are connected, and then facilitate the installation of the sealing structure between the two.

[0067] Exemplarily, the first limiting structure 330 is a protrusion disposed on the outer wall of the large diameter section 310 of the joint structure 300, and the second limiting structure 210 is a protrusion disposed on the inner wall of one end of the cooling cavity 200. In one embodiment, the second limiting structure 210 is in a ring shape that surrounds the circumference of the cooling cavity 200. In another embodiment, a plurality of second limiting structures 210 are provided, and the plurality of second limiting structures 210 are disposed at intervals along the circumference of the cooling cavity 200.

[0068] Optionally, in the axial direction of the joint structure 300, the first limiting structure 330 and the locking thread 311 are spaced apart, and the space between the two can just accommodate the second limiting structure 210, that is, the second limiting structure 210 can be clamped between the first limiting structure 330 and the locking thread 311 to further improve the reliability and stability of the connection limit between the cooling cavity 200 and the joint structure 300.

[0069] In order to improve the sealing performance between the conductive terminal 100 and the cooling cavity 200, in this embodiment, Figure 4 As shown, a sealing ring 800 is provided between the conductive terminal 100 and the cooling cavity 200. Specifically, the sealing ring 800 is sleeved on the conductive terminal 100, and is sealed and abutted against both the conductive terminal 100 and the cooling cavity 200, thereby reducing the risk of leakage of the cooling medium in the cooling cavity 200. Optionally, one or more sealing rings 800 may be provided between the conductive terminal 100 and the cooling cavity 200, which is not limited in this embodiment. In one embodiment, the circumferential outer wall of the conductive terminal 100 may have a groove (not shown in the figure), and the groove is used to accommodate the sealing ring 800 to prevent the sealing ring 800 from moving in the axial direction of the conductive terminal 100, thereby improving the positioning effect of the sealing ring 800.

[0070] Optionally, in order to improve the sealing between the joint structure 300 and the cooling cavity 200, as Figure 4 As shown, a sealing ring 800 is provided between the joint structure 300 and the cooling cavity 200. Specifically, the sealing ring 800 is sleeved on the joint structure 300, and is sealed and abutted against the joint structure 300 and the cooling cavity 200, thereby reducing the risk of leakage of the cooling medium in the cooling cavity 200. Optionally, one or more sealing rings 800 may be provided between the joint structure 300 and the cooling cavity 200, which is not limited in this embodiment. In one embodiment, the circumferential outer wall of the joint structure 300 may have a groove (not shown in the figure), and the groove is used to accommodate the sealing ring 800 to prevent the sealing ring 800 from moving in the axial direction of the joint structure 300, thereby improving the positioning effect of the sealing ring 800.

[0071] Since the liquid-cooled cable 400 is provided with a cable cooling channel 430 inside, that is, the liquid-cooled cable 400 is designed as a hollow structure, the structural strength of the liquid-cooled cable 400 is bound to be affected. In this embodiment, in order to improve the structural strength of the liquid-cooled cable 400, the terminal cable assembly 10 also includes a support structure (not shown in the figure). The support structure is arranged in the cable jacket 420 and is used to support the cable jacket 420 to improve the compressive performance of the liquid-cooled cable 400 and improve the structural strength of the liquid-cooled cable 400. For example, in order to ensure the supporting effect of the support structure, the circumferential outer wall of the support structure abuts against the circumferential inner wall of the cable jacket 420 to prevent the support structure from occupying too much space in the cooling channel.

[0072] In order to prevent the support structure from affecting the flow of the cooling medium, the support structure in this embodiment is provided with a support through hole 220 connected to the cable cooling channel 430. Specifically, the support through hole 220 is arranged to penetrate the support structure in the axial direction of the liquid-cooled cable 400, so that the cooling medium outside one end of the support structure can flow to the other end through the support through hole 220 without blocking the cable cooling channel 430.

[0073] It should be noted that by providing a support structure with a support through hole 220, the support of the cable jacket 420 of the liquid-cooled cable 400 is achieved, so that the cross-sectional size of the formed cooling channel can be larger, and with the support of the support structure, the space for the cooling medium to flow will not be reduced due to bending or squeezing, thereby ensuring the flow of the cooling medium, so that the cooling medium can carry more heat. Exemplarily, the end of the cable cooling channel 430 facing away from the cooling cavity 200 can be connected to the cooling source. At this time, the cooling source, the cooling cavity 200 and the cable cooling channel 430 can form a cooling circuit. When the flow rate and flow rate of the cooling medium in the cable cooling channel 430 increase, the flow rate and flow rate in the cooling cavity 200 also increase, thereby improving the cooling effect on the conductive terminal 100, thereby achieving efficient charging of the charging gun using the terminal cable assembly 10.

[0074] In some optional embodiments, the support structure may be cylindrical, which has a better support effect and is convenient for manufacturing the support structure. In some other optional embodiments, the support structure may be spiral, which also has a better support effect.

[0075] Exemplarily, the material of the support structure may be a metal material to ensure the support effect on the cable jacket 420. Of course, it is understandable that the support structure may also be a non-metal material, and this embodiment does not limit this.

[0076] This embodiment further provides a charging gun, including the above terminal cable assembly 10. The terminal cable assembly 10 of the charging gun provided in this embodiment can withstand a larger maximum overcurrent, thereby having a higher charging efficiency.

[0077] For example, Fig. 9 and Fig.10 A charging gun provided in this embodiment includes a head structure 20 and a tail structure 30. The head structure 20 and the tail structure 30 each include at least one terminal cable assembly 10, the liquid-cooled cable 400 of the terminal cable assembly 10 of the head structure 20 is electrically connected to the liquid-cooled cable 400 of the terminal cable assembly 10 of the tail structure 30, and the cable cooling channels 430 of the two connected liquid-cooled cables 400 are connected to form a cooling circuit.

[0078] For example, Fig.10 As shown, the head structure 20 includes two terminal cable assemblies 10 , and the tail structure 30 also includes two terminal cable assemblies 10 .

[0079] In one embodiment, the charging gun further includes a collecting cavity 50, which is disposed between the head structure 20 and the tail structure 30, for example, can be sleeved on the outside of the liquid-cooled cable 400. The inlet and outlet 230 of each terminal cable assembly 10 is connected to the collecting cavity 50 through a pipeline (not shown in the figure), so that the collecting cavity 50, the pipeline, the cooling cavity 200 and the cooling channel form a cooling circuit.

[0080] For example, Fig. 9 and Fig.10 As shown, each end of the collecting cavity 50 is connected to a main pipeline 41, the inlets and outlets 230 of the two terminal cable assemblies 10 of the head structure 20 are connected to one of the main pipelines 41 through a tee 60 and two branch pipelines 42, and the inlets and outlets 230 of the two terminal cable assemblies 10 of the tail structure 30 are also connected to the other main pipeline 41 through a tee 60 and two branch pipelines 42.

[0081] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A terminal cable assembly, characterized in that: include: A conductive terminal (100), wherein the conductive terminal (100) has a connecting end (110); A cooling cavity (200), one end of the cooling cavity (200) being sealed and sleeved on the conductive terminal (100), and the connecting end (110) being located in the cooling cavity (200); A joint structure (300), the joint structure (300) being sealed and connected to the other end of the cooling cavity (200); A liquid-cooled cable (400) comprises a cable conductor (410) and a cable jacket (420) which is arranged outside the cable conductor (410) and forms a cable cooling channel (430) between the cable conductor (410), one end of the cable conductor (410) passes through the joint structure (300) and is electrically connected to the connecting end (110), the cable jacket (420) is sealedly connected to the joint structure (300), and the cable cooling channel (430) is connected to the inside of the cooling cavity (200) through the joint structure (300), and a cooling medium is present in both the cable cooling channel (430) and the cooling cavity (200).

2. The terminal cable assembly according to claim 1, characterized in that: The cooling cavity (200) is sealingly sleeved on one end of the joint structure (300), and the cable jacket (420) is sealingly sleeved on the other end of the joint structure (300).

3. The terminal cable assembly according to claim 1 or 2, characterized in that: The joint structure (300) comprises a large diameter section (310) and a small diameter section (320), the cross-sectional area of ​​the large diameter section (310) being larger than the cross-sectional area of ​​the small diameter section (320); the cooling cavity (200) is sealingly sleeved on the large diameter section (310), and the cable jacket (420) is sealingly sleeved on the small diameter section (320).

4. The terminal cable assembly according to claim 3, characterized in that: The terminal cable assembly further comprises a hoop (500), wherein the hoop (500) is sleeved on the cable jacket (420) and cooperates with the small-diameter section (320) to clamp the cable jacket (420).

5. The terminal cable assembly according to claim 4, characterized in that: The circumferential outer wall of the small-diameter section (320) is provided with a barb structure (321), and the barb structure (321) is interference-fitted with the cable jacket (420).

6. The terminal cable assembly according to claim 3, characterized in that: The terminal cable assembly also includes a locking nut (600); the outer wall of the large diameter section (310) outside the cooling cavity (200) is provided with a locking thread (311); the locking nut (600) is sleeved on the locking thread (311) and abuts against the end face of the cooling cavity (200).

7. The terminal cable assembly according to claim 1 or 2, characterized in that: A first limiting structure (330) is provided on the circumferential outer wall of the joint structure (300), and a second limiting structure (210) is provided at one end of the cooling cavity (200); the first limiting structure (330) is located in the cooling cavity (200) and abuts against the second limiting structure (210) in the axial direction of the cooling cavity (200).

8. The terminal cable assembly according to claim 1 or 2, characterized in that: The conductive terminal (100) is provided with a fastening screw hole (130), the cooling cavity (200) is provided with a through hole (220), and the fastener (700) is passed through the through hole (220) and screwed into the fastening screw hole (130) to connect the conductive terminal (100) and the cooling cavity (200).

9. The terminal cable assembly according to claim 1 or 2, characterized in that: A sealing ring (800) is provided between the conductive terminal (100) and the cooling cavity (200); and / or a sealing ring (800) is provided between the joint structure (300) and the cooling cavity (200).

10. A charging gun, characterized in that: Comprising the terminal cable assembly according to any one of claims 1 to 9.

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