Terminal assembly and liquid cooling charging system

Abstract

The invention belongs to the technical field of liquid cooling charging, and discloses a terminal assembly and a liquid cooling charging system.The terminal assembly comprises a conductive terminal, a cable and a cooling cavity, and the conductive terminal is provided with a plugging end and a connecting end; the cable is electrically connected to the connecting end; the cooling cavity is provided with a cooling inlet, one end of the cooling cavity is hermetically sleeved on the connecting end, and the other end of the cooling cavity is hermetically sleeved on the end part, used for connecting the connecting end, of the cable; the conductive terminal, the cable and the cooling cavity cooperate with each other to form a cooling cavity communicated with the cooling inlet, and a cooling medium is arranged in the cooling cavity. The terminal assembly provided by the invention has relatively high cooling efficiency, and the risk of relatively high temperature is reduced. The liquid cooling charging system has high charging efficiency.

Description

Technical Field

[0001] The present invention relates to the field of liquid-cooled charging technology, and in particular to a terminal assembly and a liquid-cooled charging system. Background Art

[0002] New energy electric vehicles need to be charged through a charging gun, which has a conductive terminal that 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 conductive terminal with a large overload current generates a lot of heat, resulting in a large temperature rise of the conductive terminal. The temperature rise of the conductive terminal directly affects the maximum current and charging time of the charging gun. Therefore, the conductive terminal needs to be cooled.

[0003] In the prior art, the cooling method for the conductive terminal is to set a cooling pipeline on the periphery of the conductive terminal, and a coolant is set in the cooling pipeline. The heat generated by the conductive terminal is first transferred to the cooling pipeline, and then taken away by the coolant in the cooling pipeline to achieve cooling. However, the contact area between the cooling pipeline and the conductive terminal is small, resulting in a low heat transfer efficiency between the coolant and the conductive terminal. The coolant cannot take away the heat on the conductive terminal in time, which in turn affects the charging efficiency of the charging gun and prolongs the charging time. It can be seen that the cooling efficiency of the conductive terminal of the charging gun in the prior art is low. Summary of the invention

[0004] The first object of the present invention is to provide a terminal assembly to solve the problem of low cooling efficiency in the prior art and improve the charging efficiency of a liquid-cooled charging system.

[0005] A second object of the present invention is to provide a liquid-cooled charging system with higher charging efficiency.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] Terminal assembly, comprising:

[0008] A conductive terminal, wherein the conductive terminal has a plug-in end and a connecting end;

[0009] a cable, electrically connected to the connection end;

[0010] A cooling cavity, wherein the cooling cavity has a cooling inlet, and one end of the cooling cavity is sealed and sleeved on the connecting end, and the other end of the cooling cavity is sealed and sleeved on the end of the cable for connecting to the connecting end;

[0011] The conductive terminal, the cable and the cooling cavity cooperate with each other to form a cooling cavity connected to the cooling inlet, and a cooling medium is arranged in the cooling cavity.

[0012] In one of the embodiments, the cable is provided with a cooling channel, the cooling channel has a channel opening on the surface of the cable, the channel opening is provided at a portion of the cable located in the cooling cavity and is connected to the cooling cavity.

[0013] In one of the embodiments, the terminal assembly further includes a supporting structure, wherein the supporting structure is disposed in the cooling channel and is provided with a supporting through hole connected to the cooling channel, and the supporting structure is used to support the cable.

[0014] In one embodiment, the connecting end includes a main body and a connecting part; the cooling cavity is sealed and sleeved on the main body, and the main body, the cable and the cooling cavity cooperate with each other to form a cooling cavity connected to the cooling inlet; the connecting part is located in the cooling cavity.

[0015] In one of the embodiments, a conductive portion is provided at one end of the cable facing the conductive terminal, and the conductive portion is stacked and electrically connected to the connecting portion; the conductive portion is located in the cooling cavity.

[0016] In one embodiment, the cooling cavity is provided with an assembly hole, the connecting end is provided with a screw hole matching the assembly hole, and the terminal assembly also includes a connecting bolt, which passes through the assembly hole and is screwed into the screw hole to connect the cooling cavity and the connecting end.

[0017] In one embodiment, the terminal assembly also includes a first sealing assembly, which is sleeved on the connecting end and used to seal the gap between the outer circumference of the connecting end and the inner circumference of the cooling cavity; the first sealing assembly is arranged on the side of the connecting bolt facing the cooling cavity.

[0018] In one embodiment, a stopper is provided on the outer peripheral surface of the connecting end, and the stopper is used to abut against the end surface of one end of the cooling cavity to limit the relative position of the cooling cavity and the conductive terminal;

[0019] and / or,

[0020] The terminal assembly also includes a second sealing assembly, which is sleeved on the cable and located at the connection between the cable and the cooling cavity; a limiting protrusion is provided on the inner wall of one end of the second sealing assembly, and the other end is connected to the cable, and a limiting groove is provided on the outer wall of the cooling cavity, and the limiting protrusion is clamped in the limiting groove.

[0021] In one embodiment, the cooling cavity comprises a cavity body, a transition structure and a sealing joint, one end of the cavity body is sealed and sleeved on the connection end, and the other end of the cavity body is sealed and sleeved on the cable, and the cavity body, the conductive terminal and the cable cooperate with each other to form the cooling cavity;

[0022] The transition structure is connected to one side of the cavity body, and the transition structure has a connecting flow channel connected to the cooling cavity. The sealing joint is sealed at the flow channel opening of the connecting flow channel away from the cooling cavity. The cooling inlet is arranged at the sealing joint and connected to the connecting flow channel.

[0023] A liquid-cooled charging system comprises a terminal assembly as described above.

[0024] The terminal assembly and liquid-cooled charging system provided by the present invention have at least the following beneficial effects:

[0025] The connecting end of the conductive terminal is used to electrically connect with the cable to achieve conduction between the cable and the conductive terminal. One end of the cooling cavity is sealed and sleeved on the connecting end, and the other end is sealed and sleeved on the end of the cable used to connect to the connecting end, so that the conductive terminal, the cable and the cooling cavity can cooperate with each other to form a cooling cavity. The cooling medium in the cooling cavity can directly contact the connecting end and the part of the cable used to connect to the connecting end, and then can directly absorb the heat from the conductive terminal and the cable, so as to promptly take away the heat from the conductive terminal and the cable, thereby improving the heat transfer efficiency between the cooling medium and the conductive terminal and the cable, so that the temperature of the terminal assembly will not be too high, thereby not limiting the charging efficiency of the liquid-cooled charging system using the terminal assembly, and shortening the charging time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 is a first structural schematic diagram of a terminal assembly provided in Embodiment 1 of the present invention;

[0028] Figure 2 is a second structural schematic diagram of the terminal assembly provided in the first embodiment of the present invention;

[0029] Figure 3 is a cross-sectional view of a terminal assembly provided in Embodiment 1 of the present invention;

[0030] Figure 4is an exploded view of a terminal assembly provided in Embodiment 1 of the present invention;

[0031] Figure 5 is a schematic structural diagram of a conductive terminal provided in Embodiment 1 of the present invention;

[0032] Figure 6 is a schematic structural diagram of a cooling cavity provided in Embodiment 1 of the present invention;

[0033] Figure 7 is a schematic diagram of the structure of a terminal assembly provided in Embodiment 2 of the present invention;

[0034] Figure 8 is a schematic structural diagram of a conductive terminal provided in Embodiment 2 of the present invention;

[0035] Fig. 9 is a cross-sectional view of a terminal assembly provided in Embodiment 2 of the present invention;

[0036] Fig.10 is a structural schematic diagram of a liquid-cooled charging system provided in Embodiment 3 of the present invention;

[0037] Fig.11 It is a structural schematic diagram of a partial liquid-cooled charging system provided in Example 3 of the present invention.

[0038] In the figure:

[0039] 1. Conductive terminal; 11. Plug-in terminal; 12. Connecting terminal; 121. Main body; 122. Connecting part; 123. Screw hole; 124. Stopper; 130. Sealing groove;

[0040] 2. Cable; 21. Cooling channel; 211. Channel opening; 22. Conductive part;

[0041] 3. Cooling cavity, 31. Cooling inlet; 32. Assembly hole; 33. Limiting groove; 34. Cavity body; 35. Transfer structure; 351. Connecting flow channel; 3511. First section; 3512. Second section; 352. Sealing hole; 36. Sealing joint; 37. Sealing screw;

[0042] 4. Support structure; 41. Support through hole;

[0043] 5. Connecting bolts;

[0044] 6. A first sealing assembly;

[0045] 7. Second sealing assembly; 71. Position limiting protrusion; 72. Sealing plug; 73. Waterproof ring;

[0046] 10. Cooling chamber;

[0047] 100, terminal assembly; 200, head structure; 300, tail structure; 410, main pipeline; 420, branch pipeline; 500, collecting cavity; 600, tee. DETAILED DESCRIPTION

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0055] Embodiment 1

[0056] This embodiment provides a terminal assembly that can be used in liquid-cooled charging systems such as charging guns, and has high cooling efficiency, so that the charging gun and liquid-cooled charging system using the terminal assembly have high charging efficiency.

[0057] For example, Figures 1 to 6 As shown, the terminal assembly 100 includes a conductive terminal 1, a cable 2 and a cooling cavity 3. The conductive terminal 1 has a plug end 11 and a connection end 12. The plug end 11 and the connection end 12 are two ends of the conductive terminal 1 in the axial direction thereof. The plug end 11 is used to be plugged into a slot of a vehicle or other device to be charged, and the connection end 12 is used to electrically connect the cable 2, for example, one end of the cable 2 is electrically connected to the connection end 12.

[0058] In some optional embodiments, such as Figure 1 and Figure 2 As shown, the plug-in end 11 in this embodiment is cylindrical.

[0059] like Figure 2As shown, the cooling cavity 3 has a cooling inlet 31, and the cooling inlet 31 can be connected to the cooling source, and the cooling medium in the cooling source can enter the cooling cavity 3 through the cooling inlet 31. One end of the cooling cavity 3 is sealed and sleeved on the connecting end 12, and the other end of the cooling cavity 3 is sealed and sleeved on the end of the cable 2 for connecting the connecting end 12, so that the conductive terminal 1, the cable 2 and the cooling cavity 3 cooperate with each other to form a cooling cavity 10 connected to the cooling inlet 31. A cooling medium is provided in the cooling cavity 10, and the coolant medium is used to cool the conductive terminal 1 and the cable 2 to prevent the conductive terminal 1 from being too hot.

[0060] Exemplarily, the cooling medium may be a liquid or a gas, which is not limited in this embodiment. The cooling medium may be a common cooling liquid in the prior art, or a cooling oil in the prior art, which is not limited in this embodiment.

[0061] Optionally, the cooling cavity 3 may be made of metal or non-metal, which is not limited in this embodiment. When the cooling cavity 3 is made of metal, on the one hand, the cooling cavity 3 has higher structural strength and pressure resistance, and on the other hand, the cooling cavity 3 also has higher sealing performance, reducing the risk of cooling medium leakage.

[0062] In the terminal assembly 100 provided in this embodiment, the connecting end 12 of the conductive terminal 1 is used to be electrically connected to the cable 2 to achieve conduction between the cable 2 and the conductive terminal 1. One end of the cooling cavity 3 is sealed and sleeved on the connecting end 12, and the other end is sealed and sleeved on the end of the cable 2 for connecting to the connecting end 12, so that the conductive terminal 1, the cable 2 and the cooling cavity 3 can cooperate with each other to form a cooling cavity 10. The cooling medium in the cooling cavity 10 can directly contact the connecting end 12 and the part of the cable 2 for connecting to the connecting end 12, and can directly absorb the heat from the conductive terminal 1 and the cable 2, so as to be able to take away the heat from the conductive terminal 1 and the cable 2 in time, thereby improving the heat transfer efficiency between the cooling medium and the conductive terminal 1 and the cable 2, so that the temperature of the terminal assembly 100 will not be too high, and thus will not limit the charging efficiency of the liquid-cooled charging system using the terminal assembly 100, thereby shortening the charging time.

[0063] In order to avoid the problem of overheating of the cable 2 due to the transmission of large current, in some optional embodiments, the cable 2 in this embodiment is a liquid-cooled cable. Figure 3 As shown, the cable 2 is provided with a cooling channel 21, as shown in FIG. Figure 4As shown, the cooling channel 21 has a channel opening 211 on the surface of the cable 2, and the channel opening 211 is provided at the portion of the cable 2 located in the cooling cavity 3, and is connected to the cooling cavity 10. In this way, the cooling medium in the cooling cavity 10 can enter the cooling channel 21 through the channel opening 211, and then flow inside the cable 2 to take away the heat generated by the cable 2, thereby cooling the cable 2. The provision of the cooling channel 21 enables the heat generating wire inside the cable 2 to directly contact the cooling medium, thereby improving the heat exchange efficiency between the cable 2 and the cooling medium, and improving the efficiency of cooling the cable 2.

[0064] Since the cooling channel 21 is provided inside the cable 2, that is, the cable 2 is designed as a hollow structure, the structural strength of the cable 2 will inevitably be affected. In this embodiment, in order to improve the structural strength of the cable 2, for example, Figure 3 or Figure 4 As shown, the terminal assembly 100 further includes a support structure 4. The support structure 4 is disposed in the cooling channel 21 and is used to support the cable 2 to improve the compression resistance of the cable 2 and the structural strength of the cable 2. For example, in order to ensure the supporting effect of the support structure 4, the circumferential outer wall of the support structure 4 abuts against the circumferential inner wall of the cable 2 to prevent the support structure 4 from occupying too much space in the cooling channel 21.

[0065] In order to prevent the support structure 4 from affecting the flow of the cooling medium, Figure 4 As shown, the support structure 4 in this embodiment is provided with a support through hole 41 connected to the cooling channel 21. Specifically, the support through hole 41 is arranged to penetrate the support structure 4 in the axial direction of the cable 2, so that the cooling medium outside one end of the support structure 4 can flow to the other end through the support through hole 41 without blocking the cooling channel 21.

[0066] It should be noted that by providing a support structure 4 having a support through hole 41, the inner wall of the cable 2 is supported, so that the cross-sectional size of the formed cooling channel 21 can be larger, and with the support of the support structure 4, 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 cooling channel 21 facing away from the cooling cavity can be connected to the cooling source. At this time, the cooling source, the cooling cavity 10 and the cooling channel 21 can form a cooling circuit. When the flow rate and flow velocity of the cooling medium in the cooling channel 21 increase, the flow rate and flow velocity in the cooling cavity 10 also increase, thereby improving the cooling effect on the conductive terminal 1, thereby achieving efficient charging of the liquid-cooled charging system using the terminal assembly 100.

[0067] In some optional embodiments, the support structure 4 may be cylindrical, which has a better support effect and is convenient for manufacturing the support structure 4. Figure 4As shown, the support structure 4 can also be in a spiral shape, which can also have a better supporting effect.

[0068] Exemplarily, the material of the support structure 4 may be a metal material to ensure the supporting effect on the cable 2. Of course, it is understandable that the support structure 4 may also be a non-metal material, and this embodiment does not limit this.

[0069] In some optional embodiments, in order to improve the overall structural strength of the conductive terminal 1 , the conductive terminal 1 in this embodiment is an integrated structure, so as to have a higher structural strength and a lower resistance.

[0070] Please continue to see Figure 3 or Figure 4 , the connection end 12 includes a main body 121 and a connection part 122. Among them, one end of the cooling cavity 3 is sealed and sleeved on the main body 121, and the main body 121, the cable 2 and the cooling cavity 3 cooperate with each other to form a cooling cavity 10 connected to the cooling inlet 31. The connection part 122 is located in the cooling cavity 10 and is used to connect the cable 2. Since the connection part 122 of the conductive terminal 1 used to connect the cable 2 is located in the cooling cavity 10, and the part where the connection part 122 is connected to the cable 2 is the area where the maximum heat is generated in the entire terminal assembly 100, in this embodiment, the cooling medium in the cooling cavity 10 can completely immerse the connection part 122, thereby increasing the contact area between the connection part 122 and the cooling medium, and further improving the heat transfer efficiency between the connection part 122 and the cooling medium, so as to quickly cool down the connection part 122 and avoid the excessive temperature of the area where the connection part 122 is connected to the cable 2.

[0071] Further optionally, if Figure 5 As shown, the main body 121 in this embodiment is cylindrical, and one end of the cooling cavity 3 is also cylindrical to facilitate sealing connection with the main body 121 to ensure the sealing effect. The connecting portion 122 in this embodiment is flat, and the longitudinal section size of the connecting portion 122 is smaller than the longitudinal section size of the main body 121.

[0072] In order to improve the connection effect between the cable 2 and the connecting portion 122, in one embodiment, as Figure 4As shown, a conductive portion 22 is provided at one end of the cable 2 facing the conductive terminal 1, and the conductive portion 22 is electrically connected to the connecting portion 122 to reduce the difficulty of connecting the cable 2 to the conductive terminal 1. In some optional embodiments, the conductive portion 22 and the connecting portion 122 are stacked, that is, the conductive portion 22 is also in a flat block shape, and the large surface of the conductive portion 22 is in contact with the large surface of the connecting portion 122, so that the two have a larger contact area, thereby improving the connection reliability of the two. It should be noted that the conductive portion 22 in this embodiment is arranged to avoid the channel opening 211. For example, the conductive portion 22 is arranged on one side of the channel opening 211 so as not to affect the flow area of ​​the channel opening 211, thereby ensuring the flow of the cooling medium in the cooling channel 21.

[0073] In order to further improve the connection effect between the connection portion 122 and the conductive portion 22 , in this embodiment, the connection portion 122 and the conductive portion 22 are connected by ultrasonic welding to reduce the risk of connection failure.

[0074] The conductive part 22 in this embodiment is located in the cooling cavity 10, so that the conductive part 22 can be in direct contact with the cooling medium, thereby improving the effect of the cooling medium cooling the conductive part 22, reducing the risk of excessive temperature at the connection between the conductive part 22 and the connecting part 122, and increasing the maximum overcurrent that the terminal assembly 100 can withstand, thereby improving the charging efficiency of the liquid-cooled charging system using the terminal assembly 100.

[0075] There are many ways to connect the cooling cavity 3 and the conductive terminal 1. This embodiment provides a connection structure between the cooling cavity 3 and the conductive terminal 1. Specifically, Figure 4 or Figure 6 As shown, the cooling cavity 3 is provided with an assembly hole 32. Figure 5 As shown, the connecting end 12 of the conductive terminal 1 is provided with a screw hole 123 that matches the assembly hole 32. In this embodiment, the assembly hole 32 and the screw hole 123 match each other, which means that the assembly hole 32 and the screw hole 123 are coaxially arranged. Exemplarily, the screw hole 123 is arranged on the main body 121. The terminal assembly 100 also includes a connecting bolt 5, the screw rod of the connecting bolt 5 passes through the assembly hole 32 and is screwed into the screw hole 123 to connect the cooling cavity 3 and the connecting end 12. In this way, the structure connecting the cooling cavity 3 and the conductive terminal 1 is relatively simple, easy to assemble, and has a low cost. It should be noted that the nut of the connecting bolt 5 is in close contact with the outer wall surface of the cooling cavity 3, so that the cooling cavity 3 can be in close contact with the main body 121 of the conductive terminal 1, thereby improving the sealing of the connection between the conductive terminal 1 and the cooling cavity 3.

[0076] In some optional embodiments, in order to improve the connection effect between the cooling cavity 3 and the conductive terminal 1, the connecting bolts 5, the assembly holes 32 and the screw holes 123 are each provided in multiple corresponding positions, so that the cooling cavity 3 and the conductive terminal 1 have multiple connection points, further improving the connection reliability between the cooling cavity 3 and the conductive terminal 1.

[0077] It is understandable that the connection method between the cooling cavity 3 and the conductive terminal 1 is not limited to the connection through the connecting bolt 5. The cooling cavity 3 can also be provided with an internal thread, the conductive terminal 1 can be provided with an external thread, and the cooling cavity 3 and the conductive terminal 1 can be directly screwed together. This embodiment does not limit this.

[0078] The sealing performance of the method of connecting the cooling cavity 3 and the conductive terminal 1 by the connecting bolt 5 can be further improved by providing a first sealing component 6. For example, Figure 3 and Figure 4 As shown, the terminal assembly 100 further includes a first sealing assembly 6, which is sleeved on the connection end 12. For example, the first sealing assembly 6 can be sleeved on the body portion 121. The first sealing assembly 6 is used to seal the gap between the outer circumference of the connection end 12 and the inner circumference of the cooling cavity 3, so as to form a more sealed cooling cavity 10 and reduce the risk of cooling medium leaking through the gap between the cooling cavity 3 and the connection end 12.

[0079] In one embodiment, Figure 3 As shown, the first sealing component 6 is arranged on the side of the connecting bolt 5 facing the cooling cavity 10. For example, in the axial direction of the conductive terminal 1, the first sealing component 6 is arranged on the side of the connecting bolt 5 close to the cooling cavity 10. In this way, it is possible to prevent the cooling medium from flowing through the gap between the cooling cavity 3 and the conductive terminal 1 to contact the connecting bolt 5 and enter the screw hole 123, thereby reducing the risk of the cooling medium affecting the structural strength of the connecting bolt 5 and reducing the waste of the cooling medium.

[0080] Exemplarily, the first sealing component 6 includes at least one sealing ring, the material of which is silicone, rubber, etc., which is not limited in this embodiment. The first sealing component 6 in this embodiment includes two sealing rings, which are spaced apart along the axial direction of the conductive terminal 1.

[0081] Alternatively, if Figure 5 As shown, the outer peripheral surface of the body of the conductive terminal 1 is provided with an annular sealing groove 130 , and the sealing ring is placed in the sealing groove 130 to be limited by the sealing groove 130 to prevent the sealing ring from axial movement.

[0082] In order to facilitate the assembly of the cooling cavity 3 and the conductive terminal 1, in one embodiment, as Figure 5As shown, a stopper 124 is provided on the outer peripheral surface of the connection end 12. When the connection end 12 includes a main body 121, the stopper 124 is provided on the main body 121. The stopper 124 is used to abut against the end surface of one end of the cooling cavity 3 to limit the relative position of the cooling cavity 3 and the conductive terminal 1, that is, to limit the maximum length of the conductive terminal 1 extending into the cooling cavity 3. In this way, on the one hand, it can ensure that the assembly positions of the cooling cavity 3 and the conductive terminal 1 of each terminal assembly 100 are consistent, which is convenient for batch manufacturing of the terminal assembly 100; on the other hand, it can avoid the cooling cavity 10 being too small due to the part of the conductive terminal 1 inserted into the cooling cavity 3 being too long, which affects the cooling effect; in addition, the cooling cavity 3 abuts against the stopper 124 to form a sealing structure, so that there are multiple seals between the cooling cavity 3 and the conductive terminal 1, further improving the sealing effect.

[0083] Further optionally, the stopper 124 is annular in shape to increase the contact area between the stopper 124 and the cooling cavity 3 , thereby ensuring the stopper positioning effect and the sealing effect.

[0084] A sealing structure is also provided between the cooling cavity 3 and the cable 2 to ensure the sealing of the connection between the cooling cavity 3 and the cable 2. Figure 3 or Figure 4 As shown, the terminal assembly 100 further includes a second sealing assembly 7. The second sealing assembly 7 is sleeved on the cable 2 and located at the connection between the cable 2 and the cooling cavity 3. The second sealing assembly 7 is used to seal the gap between the cable 2 and the cooling cavity 3 to further improve the sealing performance of the cooling cavity 10.

[0085] In one embodiment, the second sealing assembly 7 includes a sealing plug 72 and a waterproof ring 73 both sleeved on the cable 2. The waterproof ring 73 is sandwiched between the end face of the cooling cavity 3, the inner wall of the sealing plug and the outer wall of the cable 2, and has a waterproof sealing function. One end of the sealing plug 72 in the axial direction is in close contact with the outer wall of the cable 2, the other end is in close contact with the outer wall of the cooling cavity 3, and the middle part is in close contact with the outer wall of the waterproof ring 73, so as to realize the connection and sealing between the cooling cavity 3 and the cable 2, and has a good sealing effect.

[0086] In other embodiments, the second sealing assembly 7 may further include at least one sealing ring, which is sleeved on the cable 2 to provide sealing performance.

[0087] In order to limit the relative position of the second sealing component 7 and the cooling cavity 3, optionally, as Figure 3 As shown, the inner wall of one end of the second sealing component 7 is provided with a limiting protrusion 71, and the other end is connected to the cable 2, as shown in FIG. Figure 6As shown, the outer wall of the cooling cavity 3 is provided with a limiting groove 33, and the limiting protrusion 71 is snapped into the limiting groove 33. On the one hand, the cable 2 and the cooling cavity 3 can be connected through the second sealing component 7. On the other hand, the relative position of the second sealing component 7 and the cooling cavity 3 can be limited, thereby reducing the difficulty of assembling the second sealing component 7 and the cooling cavity 3 and improving the assembly efficiency.

[0088] Exemplarily, when the second sealing assembly 7 includes a waterproof ring 73 and a sealing plug 72 , a limiting protrusion 71 is provided on the inner wall of one end of the sealing plug 72 , and the other end of the sealing plug 72 is connected to the outer wall of the cable 2 .

[0089] Optionally, the limiting protrusion 71 and the limiting groove 33 in this embodiment are both annular, so that the limiting protrusion 71 can be easily inserted into the limiting groove 33, without the need to control the cooling cavity 3 and the sealing plug 72 to be in a specific position, thereby further reducing the difficulty of assembling the terminal assembly 100.

[0090] One end of the cooling cavity 3 in the axial direction is connected to the connection end 12 of the conductive terminal 1, and the other end is connected to the cable 2, so that the cooling inlet 31 of the cooling cavity 3 needs to be set on one side of the cooling cavity. In this embodiment, in order to facilitate the connection of the cooling inlet 31 with the pipeline, for example, Figure 3 and Figure 4 As shown, the cooling cavity 3 includes a cavity body 34 and a transfer structure 35. The transfer structure 35 is connected to one side of the cavity body 34, and the transfer structure 35 has a connecting flow channel 351 connected to the cooling cavity 10, and the connecting flow channel 351 is connected to the cooling inlet 31, so that the cooling medium enters the cooling cavity 10 through the connecting flow channel 351. Among them, one end of the cavity body 34 is sealed and sleeved on the connecting end 12, and the other end of the cavity body 34 is sealed and sleeved on the cable 2. The cavity body 34, the conductive terminal 1 and the cable 2 cooperate with each other to form the cooling cavity 10. By setting the transfer structure 35, and providing the connecting flow channel 351 in the transfer structure 35, the setting position of the cooling inlet 31 is more flexible, so as to facilitate the connection of the pipeline and reduce the difficulty of assembly.

[0091] It should be noted that the transfer structure 35 and the cavity body 34 in this embodiment are an integrated structure to have a higher structural strength.

[0092] Further optionally, if Figure 3As shown, the connecting flow channel 351 includes a first section 3511 and a second section 3512 arranged at an angle, and the second section 3512 can be arranged coaxially with the cooling inlet 31. Among them, the flow channel opening of the first section 3511 facing away from the second section 3512 is connected to the cooling cavity 10. In this way, the extension direction of the second section 3512 can be the axial direction of the cavity body 34, so that the extension direction of the pipeline connecting the cooling inlet 31 is roughly the same as the extension direction of the cable 2, so as to reduce the space required to be occupied in the radial direction of the liquid-cooled charging system using the terminal assembly 100, and improve the miniaturization of the liquid-cooled charging system.

[0093] In some optional embodiments, the cooling cavity 3 further includes a sealing joint 36, which is sealed at the flow channel opening of the connecting flow channel 351 away from the cooling cavity 10, and the cooling inlet 31 is provided at the sealing joint 36 and connected to the connecting flow channel 351. By providing the sealing joint 36, the connection and communication between the cooling cavity 3 and the pipeline can be facilitated. The axial direction of the sealing joint 36 in this embodiment is the same as the axial direction of the second section 3512. For example, the sealing structure and the second section 3512 can be coaxially arranged.

[0094] Exemplarily, a sealing hole 352 is provided on the surface of the transition structure 35 facing away from the cavity body 34, and the sealing hole 352 is connected to the second section 3512. The cooling cavity 3 also includes a sealing screw 37 that is sealed and screwed into the sealing hole 352. When the cooling medium in the cooling cavity 10 needs to be released, the sealing screw 37 is removed from the sealing hole 352. At this time, the cooling medium in the cooling cavity 10 flows out through the first section 3511, the second section 3512 and the sealing hole 352, so that the cooling cavity 3 is emptied.

[0095] Optionally, the cavity body 34 and the conductive terminal 1 in this embodiment can be coaxially connected or non-coaxially connected, which is not limited in this embodiment. The cavity body 34 and the cable 2 can be coaxially connected or non-coaxially connected, which is not limited in this embodiment.

[0096] In the terminal assembly 100 provided in this embodiment, a cylindrical support structure 4 is provided in the center of the cable 2 to ensure the smooth flow of the cooling medium inside the cable 2. By providing a cooling cavity 3 made of a metal material, the pressure resistance of the terminal assembly 100 can be effectively improved. The connecting portion 122 of the conductive terminal 1 and the conductive portion 22 of the cable 2 are both located in the cooling cavity 10, which improves the effect of the cooling medium cooling the conductive portion 22 and the connecting portion 122, reduces the risk of excessive temperature at the connection between the conductive portion 22 and the connecting portion 122, and increases the maximum overcurrent that the terminal assembly 100 can withstand, thereby improving the charging efficiency of the liquid-cooled charging system using the terminal assembly 100.

[0097] Embodiment 2

[0098] This embodiment provides a terminal assembly 100 , which is different from the first embodiment in that the shape of the plug-in end 11 is different.

[0099] Specifically, Figures 7 to 9 As shown, the plug-in end 11 of the conductive terminal 1 in this embodiment is in the shape of a cuboid, rather than a cylinder, so as to adapt to the situation where the slot is in the shape of a cuboid.

[0100] Optionally, the plug-in end 11 in this embodiment may also be provided with a hole (not shown in the figure).

[0101] The other structures in this embodiment are similar to the corresponding structures in the first embodiment and have similar beneficial effects, and this embodiment will not be described in detail here.

[0102] Embodiment 3

[0103] This embodiment also provides a liquid-cooled charging system, including the terminal assembly 100 in Embodiment 1 and / or Embodiment 2. The terminal assembly 100 of the liquid-cooled charging system provided in this embodiment can withstand a larger maximum overcurrent, thereby having a higher charging efficiency.

[0104] For example, Fig.10 and Fig.11 A liquid-cooled charging system provided in this embodiment includes a head structure 200 and a tail structure 300. The head structure 200 and the tail structure 300 each include at least one terminal assembly 100, the cable 2 of the terminal assembly 100 of the head structure 200 is electrically connected to the cable 2 of the terminal assembly 100 of the tail structure 300, and the cooling channels 21 of the two connected cables 2 are connected to form a cooling circuit.

[0105] For example, Fig.11 As shown, the head structure 200 includes two terminal assemblies 100, and the tail structure 300 also includes two terminal assemblies 100. Optionally, the two terminal assemblies 100 of the head structure 200 can be the terminal assemblies 100 in the first embodiment, and the two terminal assemblies 100 of the tail structure 300 can be the terminal assemblies 100 in the second embodiment.

[0106] In one embodiment, the liquid-cooled charging system further includes a collecting cavity 500, which is disposed between the head structure 200 and the tail structure 300, for example, can be sleeved on the outside of the cable 2. The cooling inlet 31 of each terminal assembly 100 is connected to the collecting cavity 500 through a pipeline (not shown in the figure), so that the collecting cavity 500, the pipeline, the cooling cavity 10 and the cooling channel 21 form a cooling circuit.

[0107] Exemplarily, a main line 410 is connected to each of the two ends of the collecting cavity 500, the cooling inlets 31 of the two terminal assemblies 100 of the head structure 200 are connected to one of the main lines 410 via a tee 600 and two branch lines 420, and the cooling inlets 31 of the two terminal assemblies 100 of the tail structure 300 are also connected to the other main line 410 via a tee 600 and two branch lines 420.

[0108] Optionally, the liquid-cooled charging system provided in this embodiment may be a charging gun.

[0109] 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 assembly, characterized in that: include: A conductive terminal (1), the conductive terminal (1) having a plug-in end (11) and a connection end (12); A cable (2) electrically connected to the connection end (12); A cooling cavity (3), the cooling cavity (3) having a cooling inlet, one end of the cooling cavity (3) being sealed and sleeved on the connecting end (12), and the other end of the cooling cavity (3) being sealed and sleeved on the end of the cable (2) for connecting to the connecting end (12); The conductive terminal (1), the cable (2) and the cooling cavity (3) cooperate with each other to form a cooling cavity (10) connected to the cooling inlet, and a cooling medium is provided in the cooling cavity (10).

2. The terminal assembly according to claim 1, characterized in that: The cable (2) is provided with a cooling channel (21), the cooling channel (21) having a channel opening (211) on the surface of the cable (2), the channel opening (211) being provided at a portion of the cable (2) located in the cooling cavity (3) and being connected to the cooling cavity (10).

3. The terminal assembly according to claim 2, characterized in that: The terminal assembly further comprises a support structure (4), wherein the support structure (4) is arranged in the cooling channel (21) and is provided with a support through hole (41) connected to the cooling channel (21), and the support structure (4) is used to support the cable (2).

4. The terminal assembly according to any one of claims 1 to 3, characterized in that: The connecting end (12) comprises a main body (121) and a connecting portion (122); the cooling cavity (3) is sealingly sleeved on the main body (121), and the main body (121), the cable (2) and the cooling cavity (3) cooperate with each other to form a cooling cavity (10) connected to the cooling inlet; the connecting portion (122) is located in the cooling cavity (10).

5. The terminal assembly according to claim 4, characterized in that: A conductive portion (22) is provided at one end of the cable (2) facing the conductive terminal (1); the conductive portion (22) and the connecting portion (122) are stacked and electrically connected; and the conductive portion (22) is located in the cooling cavity (10).

6. The terminal assembly according to any one of claims 1 to 3, characterized in that: The cooling cavity (3) is provided with an assembly hole (32), and the connecting end (12) is provided with a screw hole (123) matching the assembly hole (32). The terminal assembly also includes a connecting bolt (5), and the connecting bolt (5) passes through the assembly hole (32) and is screwed into the screw hole (123) to connect the cooling cavity (3) and the connecting end (12).

7. The terminal assembly according to claim 6, characterized in that: The terminal assembly further comprises a first sealing assembly (6), which is sleeved on the connection end (12) and used to seal the gap between the outer peripheral surface of the connection end (12) and the inner peripheral surface of the cooling cavity (3); the first sealing assembly (6) is arranged on the side of the connecting bolt (5) facing the cooling cavity (10).

8. The terminal assembly according to any one of claims 1 to 3, characterized in that: The outer peripheral surface of the connecting end (12) is provided with a stopper (124), and the stopper (124) is used to abut against the end surface of one end of the cooling cavity (3) to limit the relative position of the cooling cavity (3) and the conductive terminal (1); and / or, The terminal assembly also includes a second sealing assembly (7), which is sleeved on the cable (2) and located at the connection between the cable (2) and the cooling cavity (3); the inner wall of one end of the second sealing assembly (7) is provided with a limiting protrusion (71), and the other end is connected to the cable (2), and the outer wall of the cooling cavity (3) is provided with a limiting groove (33), and the limiting protrusion (71) is clamped in the limiting groove (33).

9. The terminal assembly according to any one of claims 1 to 3, characterized in that: The cooling cavity (3) comprises a cavity body (34), a transition structure (35) and a sealing joint (36); one end of the cavity body (34) is sealed and sleeved on the connecting end (12); the other end of the cavity body (34) is sealed and sleeved on the cable (2); the cavity body (34), the conductive terminal (1) and the cable (2) cooperate with each other to form the cooling cavity (10); The transition structure (35) is connected to one side of the cavity body (34), and the transition structure (35) has a connecting flow channel (351) connected to the cooling cavity (10), the sealing joint (36) is sealed at the flow channel opening of the connecting flow channel (351) away from the cooling cavity (10), and the cooling inlet is arranged at the sealing joint (36) and is connected to the connecting flow channel (351).

10. Liquid-cooled charging system, characterized in that, Comprising a terminal assembly as described in any one of claims 1-9.

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