Terminal components and liquid-cooled charging system

Abstract

This utility model belongs to the field of liquid-cooled charging technology, and discloses a terminal assembly and a liquid-cooled charging system. The terminal assembly includes conductive terminals, cables, and a cooling cavity. The conductive terminals have a plug-in end and a connection end; the cable is electrically connected to the connection end; the cooling cavity has a cooling inlet, and one end of the cooling cavity is sealed and sleeved to the connection end, while the other end of the cooling cavity is sealed and sleeved to the end of the cable used to connect to the connection end; the conductive terminals, cables, and cooling cavity cooperate to form a cooling cavity communicating with the cooling inlet, and a cooling medium is provided inside the cooling cavity. The terminal assembly provided by this utility model has high cooling efficiency, reducing the risk of high temperatures. The liquid-cooled charging system has high charging efficiency.

Description

Technical Field

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

[0002] New energy electric vehicles need to be charged using a charging gun. The charging gun has conductive terminals that are inserted into the charging port slot of the electric vehicle to begin charging. To improve charging efficiency, the charging gun typically has a high power output. The high overload current generates a large amount of heat in the conductive terminals, leading to a significant temperature rise. This temperature rise directly affects the maximum current and charging time of the charging gun; therefore, cooling of the conductive terminals is necessary.

[0003] In existing technologies, the cooling method for conductive terminals involves installing cooling pipes around the conductive terminals, with coolant flowing through these pipes. Heat generated by the conductive terminals is first transferred to the cooling pipes and then carried away by the coolant, achieving cooling. However, the contact area between the cooling pipes and the conductive terminals is relatively small, resulting in low heat transfer efficiency between the coolant and the terminals. The coolant cannot effectively remove heat from the conductive terminals, thus affecting the charging efficiency of the charging gun and prolonging the charging time. Therefore, the existing cooling method for the conductive terminals of charging guns has low cooling efficiency. Utility Model Content

[0004] The primary objective of this invention is to provide a terminal assembly to address the problem of low cooling efficiency in the prior art and improve the charging efficiency of liquid-cooled charging systems.

[0005] The second objective of this invention is to provide a liquid-cooled charging system with high charging efficiency.

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

[0007] Terminal assembly, including:

[0008] A conductive terminal having a plug-in end and a connection end;

[0009] The cable is electrically connected to the connection end;

[0010] A cooling chamber having a cooling inlet, one end of which is sealed and fitted onto the connecting end, and the other end of which is sealed and fitted onto the end of the cable used to connect to the connecting end;

[0011] The conductive terminal, the cable, and the cooling cavity cooperate to form a cooling cavity that connects to the cooling inlet, and the cooling cavity contains a cooling medium.

[0012] In one embodiment, the cable is provided with a cooling channel, the cooling channel having an opening on the surface of the cable, the opening being located in the portion of the cable within the cooling cavity and communicating with the cooling cavity.

[0013] In one embodiment, the terminal assembly further includes a support structure disposed within the cooling channel and having a support through hole communicating with the cooling channel, the support structure being used to support the cable.

[0014] In one embodiment, the connection end includes a body portion and a connecting portion; the cooling cavity is sealed and fitted onto the body portion, and the body portion, the cable, and the cooling cavity cooperate to form a cooling cavity communicating with the cooling inlet; the connecting portion is located in the cooling cavity.

[0015] In one embodiment, the cable has a conductive portion at one end facing the conductive terminal, the conductive portion being stacked and electrically connected to the connecting portion; the conductive portion is located inside 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 that mates with the assembly hole, and the terminal assembly further 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 further includes a first sealing component, which is sleeved on the connecting end and used to seal the gap between the outer peripheral surface of the connecting end and the inner peripheral surface of the cooling cavity; the first sealing component is located on the side of the connecting bolt facing the cooling cavity.

[0018] In one embodiment, the outer peripheral surface of the connection end is provided with a stop portion, which is used to abut against the end face 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 further includes a second sealing assembly, which is sleeved on the cable and located at the connection between the cable and the cooling cavity; one end of the inner wall of the second sealing assembly is provided with a limiting protrusion, and the other end is connected to the cable; the outer wall of the cooling cavity is provided with a limiting groove, and the limiting protrusion is engaged in the limiting groove.

[0021] In one embodiment, the cooling cavity includes a cavity body, a transition structure, and a sealing connector. One end of the cavity body is sealed and sleeved to the connection end, and the other end of the cavity body is sealed and sleeved to the cable. The cavity body, the conductive terminal, and the cable cooperate with each other to form the cooling cavity.

[0022] The adapter structure is connected to one side of the cavity body, and the adapter structure has a connecting flow channel that communicates with the cooling cavity. The sealing joint is sealed at the flow channel opening opposite to the cooling cavity, and the cooling inlet is located at the sealing joint and communicates with the connecting flow channel.

[0023] A liquid-cooled charging system, including the terminal assembly described above.

[0024] The terminal assembly and liquid-cooled charging system provided by this utility model 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 conductivity between the cable and the conductive terminal. One end of the cooling cavity is sealed and fitted onto the connecting end, and the other end is sealed and fitted onto the end of the cable used to connect to the connecting end. This allows the conductive terminal, cable, and cooling cavity to cooperate 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, thereby directly absorbing heat from the conductive terminal and cable. This allows the heat to be carried away from the conductive terminal and cable in a timely manner, improving the heat transfer efficiency between the cooling medium and the conductive terminal and cable. This prevents the temperature of the terminal assembly from becoming too high, thus not limiting the charging efficiency of the liquid-cooled charging system using the terminal assembly and shortening the charging time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is a first structural schematic diagram of the terminal assembly provided in Embodiment 1 of this utility model;

[0028] Figure 2 This is a schematic diagram of the second structure of the terminal assembly provided in Embodiment 1 of this utility model;

[0029] Figure 3 This is a cross-sectional view of the terminal assembly provided in Embodiment 1 of this utility model;

[0030] Figure 4This is an exploded view of the terminal assembly provided in Embodiment 1 of this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the conductive terminal provided in Embodiment 1 of this utility model;

[0032] Figure 6 This is a schematic diagram of the cooling cavity provided in Embodiment 1 of this utility model;

[0033] Figure 7 This is a schematic diagram of the terminal assembly provided in Embodiment 2 of this utility model;

[0034] Figure 8 This is a schematic diagram of the structure of the conductive terminal provided in Embodiment 2 of this utility model;

[0035] Figure 9 This is a cross-sectional view of the terminal assembly provided in Embodiment 2 of this utility model;

[0036] Figure 10 This is a schematic diagram of the liquid-cooled charging system provided in Embodiment 3 of this utility model;

[0037] Figure 11 This is a schematic diagram of the structure of a partial liquid-cooled charging system provided in Embodiment 3 of this utility model.

[0038] In the picture:

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

[0040] 2. Cables; 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. Adapter 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. First sealing assembly;

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

[0046] 10. Cooling chamber;

[0047] 100. Terminal assembly; 200. Head structure; 300. Tail structure; 410. Main pipe; 420. Branch pipe; 500. Manifold; 600. Tee. Detailed Implementation

[0048] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0049] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0050] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. In the description of this embodiment, unless otherwise specified, "multiple" specifically refers to two or more.

[0052] In the description of this embodiment, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., are based on the orientation or positional relationships shown in the accompanying drawings and are only for ease of description and simplification of operation. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are merely used for distinction in description and have no special meaning.

[0053] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or it can be located in between the component.

[0054] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0055] Example 1

[0056] This embodiment provides a terminal assembly that can be applied in liquid-cooled charging systems such as charging guns. It has high cooling efficiency, which enables charging guns and liquid-cooled charging systems using the terminal assembly to have high charging efficiency.

[0057] For example, such as 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-in end 11 and a connection end 12. The plug-in end 11 and the connection end 12 are the two ends of the conductive terminal 1 in its axial direction. The plug-in end 11 is used to plug into a slot in 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 alternative 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 chamber 3 has a cooling inlet 31, which is connected to a cooling source. The cooling medium in the cooling source can enter the cooling chamber 3 through the cooling inlet 31. One end of the cooling chamber 3 is sealed and sleeved to the connecting end 12, and the other end of the cooling chamber 3 is sealed and sleeved to the end of the cable 2 used to connect to the connecting end 12, so that the conductive terminal 1, the cable 2, and the cooling chamber 3 cooperate to form a cooling chamber 10 connected to the cooling inlet 31. The cooling chamber 10 contains a cooling medium, which is used to cool the conductive terminal 1 and the cable 2 to prevent the temperature of the conductive terminal 1 from becoming too high.

[0060] For example, the cooling medium can be a liquid or a gas, and this embodiment is not limited to either. The cooling medium can be a common coolant in the prior art or a cooling oil in the prior art, and this embodiment is not limited to either.

[0061] Optionally, the cooling cavity 3 can be made of metal or non-metal, and this embodiment does not limit this. When the cooling cavity 3 is made of metal, it has high structural strength and pressure resistance, and also high sealing performance, reducing the risk of cooling medium leakage.

[0062] The terminal assembly 100 provided in this embodiment has a connecting end 12 of the conductive terminal 1 used for electrical connection with the cable 2 to realize the 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 used to connect to the connecting end 12. This allows the conductive terminal 1, the cable 2, and the cooling cavity 3 to 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 used to connect to the connecting end 12, thereby directly absorbing the heat from the conductive terminal 1 and the cable 2. This can promptly remove the heat from the conductive terminal 1 and the cable 2, improving the heat transfer efficiency between the cooling medium and the conductive terminal 1 and the cable 2. This prevents the temperature of the terminal assembly 100 from becoming too high, thus not limiting the charging efficiency of the liquid-cooled charging system using the terminal assembly 100 and shortening the charging time.

[0063] To avoid overheating of cable 2 due to the transmission of large currents, in some optional embodiments, cable 2 in this embodiment is a liquid-cooled cable. For example, as... Figure 3 As shown, cable 2 is equipped with a cooling channel 21, such as Figure 4As shown, the cooling channel 21 has a channel opening 211 on the surface of the cable 2. The channel opening 211 is located in the portion of the cable 2 within the cooling cavity 3 and is connected to the cooling cavity 10. Thus, the cooling medium within the cooling cavity 10 can enter the cooling channel 21 through the channel opening 211 and flow inside the cable 2 to remove the heat generated by the cable 2, thereby cooling the cable 2. The cooling channel 21 allows the generating wires 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 increasing the efficiency of cooling the cable 2.

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

[0065] To ensure that the support structure 4 does not impede the flow of the cooling medium, such as Figure 4 As shown, the support structure 4 in this embodiment is provided with a support through hole 41 that connects to the cooling channel 21. Specifically, the support through hole 41 is provided through 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 setting the support structure 4 with the support through hole 41, the inner wall of the cable 2 is supported, thereby allowing the cross-sectional size of the formed cooling channel 21 to be larger. Furthermore, with the support of the support structure 4, the space for the cooling medium to flow will not be reduced due to bending or compression, ensuring the flow rate of the cooling medium and allowing it to carry more heat. For example, the end of the cooling channel 21 facing away from the cooling cavity can be connected to the cooling source. In this case, the cooling source, the cooling cavity 10, and the cooling channel 21 can form a cooling circuit. When the flow rate and velocity of the cooling medium in the cooling channel 21 increase, the flow rate and velocity in the cooling cavity 10 also increase, thereby improving the cooling effect on the conductive terminal 1 and achieving efficient charging of the liquid-cooled charging system using the terminal assembly 100.

[0067] In some optional embodiments, the support structure 4 can be cylindrical, which provides better support and facilitates its manufacture. In other optional embodiments, such as... Figure 4As shown, the support structure 4 can also be spiral-shaped, which can also provide a good support effect.

[0068] For example, the support structure 4 can be made of metal to ensure effective support for the cable 2. It is understood that the support structure 4 can also be made of non-metallic material, but 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 integral structure, so as to have both high structural strength and low resistance.

[0070] Please continue reading Figure 3 or Figure 4 The connecting end 12 includes a body portion 121 and a connecting portion 122. One end of the cooling cavity 3 is sealed and fitted onto the body portion 121, and the body portion 121, the cable 2, and the cooling cavity 3 cooperate to form a cooling cavity 10 communicating with the cooling inlet 31. The connecting portion 122 is located in the cooling cavity 10 and is used to connect the cable 2. Since the connecting portion 122 of the conductive terminal 1 for connecting the cable 2 is located in the cooling cavity 10, and the part where the connecting portion 122 connects to the cable 2 is the area that generates the most heat in the entire terminal assembly 100, in this embodiment, the cooling medium in the cooling cavity 10 can completely immerse the connecting portion 122, thereby increasing the contact area between the connecting portion 122 and the cooling medium, further improving the heat transfer efficiency between the connecting portion 122 and the cooling medium, so as to quickly cool down the connecting portion 122 and avoid the area where the connecting portion 122 connects to the cable 2 becoming too hot.

[0071] Further optional, such as Figure 5 As shown, in this embodiment, the main body 121 is cylindrical, and correspondingly, one end of the cooling cavity 3 is also cylindrical to facilitate a sealed connection with the main body 121 and ensure a sealing effect. In this embodiment, the connecting part 122 is flat, and the longitudinal cross-sectional dimension of the connecting part 122 is smaller than that of the main body 121.

[0072] To improve the connection effect between cable 2 and connector 122, in one possible implementation, such as Figure 4As shown, the end of the cable 2 facing the conductive terminal 1 is provided with a conductive part 22, which is electrically connected to the connecting part 122 to reduce the difficulty of connecting the cable 2 and the conductive terminal 1. In some optional embodiments, the conductive part 22 and the connecting part 122 are stacked, that is, the conductive part 22 is also flat, and the large surface of the conductive part 22 contacts the large surface of the connecting part 122, so that the two have a large contact area and improve the connection reliability. It should be noted that in this embodiment, the conductive part 22 is disposed to avoid the channel opening 211. For example, the conductive part 22 is disposed on one side of the channel opening 211 so as not to affect the flow area of ​​the channel opening 211 and to ensure the flow rate of the cooling medium in the cooling channel 21.

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

[0074] In this embodiment, the conductive part 22 is located inside the cooling cavity 10, which allows the conductive part 22 to directly contact the cooling medium, thereby improving the cooling effect of the cooling medium on the conductive part 22, reducing the risk of excessive temperature at the connection between the conductive part 22 and the connecting part 122, increasing the maximum overcurrent that the terminal assembly 100 can withstand, and thus improving the charging efficiency of the liquid-cooled charging system using the terminal assembly 100.

[0075] The connection between the cooling cavity 3 and the conductive terminal 1 can take many forms. This embodiment provides a connection structure between the cooling cavity 3 and the conductive terminal 1. Specifically, as shown in the example... Figure 4 or Figure 6 As shown, the cooling cavity 3 is provided with mounting holes 32, such as... Figure 5 As shown, the connecting end 12 of the conductive terminal 1 is provided with a screw hole 123 that mates with the mounting hole 32. In this embodiment, the mounting hole 32 and the screw hole 123 mate with each other, meaning that the mounting hole 32 and the screw hole 123 are coaxially arranged. Exemplarily, the screw hole 123 is provided on the body portion 121. The terminal assembly 100 also includes a connecting bolt 5, the screw of which passes through the mounting hole 32 and is screwed into the screw hole 123 to connect the cooling cavity 3 and the connecting end 12. Thus, the structure connecting the cooling cavity 3 and the conductive terminal 1 is relatively simple, easy to assemble, and has a lower 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 and the body portion 121 of the conductive terminal 1 can be in close contact, improving the sealing performance 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, multiple connecting bolts 5, mounting holes 32 and screw holes 123 are provided one-to-one, so that the cooling cavity 3 and the conductive terminal 1 have multiple connection points, thereby further improving the connection reliability between the cooling cavity 3 and the conductive terminal 1.

[0077] It is understood that the connection between the cooling cavity 3 and the conductive terminal 1 is not limited to the connection by the connecting bolt 5. Alternatively, the cooling cavity 3 may have an internal thread, the conductive terminal 1 may have an external thread, and the cooling cavity 3 and the conductive terminal 1 may 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 connecting bolt 5 can be further improved by setting the first sealing component 6. For example, as Figure 3 and Figure 4 As shown, the terminal assembly 100 also includes a first sealing assembly 6, which is sleeved on the connecting 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 peripheral surface of the connecting end 12 and the inner peripheral surface of the cooling cavity 3, so as to form a more sealed cooling cavity 10 and reduce the risk of leakage of cooling medium through the gap between the cooling cavity 3 and the connecting end 12.

[0079] In one embodiment, such as Figure 3 As shown, the first sealing component 6 is located on the side of the connecting bolt 5 facing the cooling chamber 10. For example, in the axial direction of the conductive terminal 1, the first sealing component 6 is located on the side of the connecting bolt 5 close to the cooling chamber 10. In this way, it is possible to prevent the cooling medium from flowing through the gap between the cooling chamber 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 also reducing the waste of cooling medium.

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

[0081] Optionally, such as Figure 5 As shown, the outer circumferential surface 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 limit the sealing ring and prevent it from moving axially.

[0082] To facilitate the assembly of the cooling cavity 3 and the conductive terminal 1, in one embodiment, such as Figure 5As shown, a stop portion 124 is provided on the outer peripheral surface of the connecting end 12. When the connecting end 12 includes the body portion 121, the stop portion 124 is provided on the body portion 121. The stop portion 124 abuts against the end face 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 be ensured that the assembly positions of the cooling cavity 3 and the conductive terminal 1 of each terminal assembly 100 are consistent, facilitating mass production of the terminal assembly 100; on the other hand, it avoids the cooling cavity 10 from being too small due to the conductive terminal 1 being inserted into the cooling cavity 3 for too long, thus affecting the cooling effect; in addition, the abutment between the cooling cavity 3 and the stop portion 124 can form a sealing structure, providing multiple seals between the cooling cavity 3 and the conductive terminal 1, further improving the sealing effect.

[0083] Alternatively, the stop portion 124 may be annular to increase the contact area between the stop portion 124 and the cooling cavity 3, thereby ensuring the stop positioning effect and sealing effect.

[0084] A sealing structure is also provided between the cooling chamber 3 and the cable 2 to ensure the sealing of the connection between the cooling chamber 3 and the cable 2. Optionally, such as Figure 3 or Figure 4 As shown, the terminal assembly 100 also 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 72, and the outer wall of the cable 2, providing a waterproof seal. One end of the sealing plug 72 is in close contact with the outer wall of the cable 2 along its axial direction, 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, achieving connection and sealing between the cooling cavity 3 and the cable 2, resulting in a good sealing effect.

[0086] In other embodiments, the second sealing assembly 7 may further include at least one sealing ring fitted onto the cable 2 to provide a sealing performance.

[0087] To limit the relative position of the second sealing assembly 7 and the cooling chamber 3, optionally, as follows: Figure 3 As shown, 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, as shown. Figure 6As shown, the outer wall of the cooling cavity 3 is provided with a limiting groove 33, and the limiting protrusion 71 is engaged in the limiting groove 33. On the one hand, it enables the cable 2 to be connected to the cooling cavity 3 through the second sealing component 7. On the other hand, it can limit the relative position of the second sealing component 7 and the cooling cavity 3, reducing the assembly difficulty of the second sealing component 7 and the cooling cavity 3 and improving the assembly efficiency.

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

[0089] Optionally, in this embodiment, both the limiting protrusion 71 and the limiting groove 33 are annular to facilitate the limiting protrusion 71 to be 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, further reducing the assembly difficulty of the terminal assembly 100.

[0090] One end of the cooling cavity 3 along its 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 located on one side of the cooling cavity. In this embodiment, in order to facilitate the connection of the cooling inlet 31 to the pipeline, for example, Figure 3 and Figure 4 As shown, the cooling cavity 3 includes a cavity body 34 and a connecting structure 35. The connecting structure 35 is connected to one side of the cavity body 34 and has a connecting channel 351 that connects to the cooling cavity 10. The connecting channel 351 connects to the cooling inlet 31, allowing the cooling medium to enter the cooling cavity 10 through the connecting channel 351. One end of the cavity body 34 is sealed and sleeved to the connecting end 12, and the other end of the cavity body 34 is sealed and sleeved to the cable 2. The cavity body 34, the conductive terminal 1, and the cable 2 cooperate to form the cooling cavity 10. By setting the connecting structure 35 and having the connecting channel 351 inside the connecting structure 35, the location of the cooling inlet 31 can be more flexible, facilitating the connection of pipelines and reducing assembly difficulty.

[0091] It should be noted that the adapter structure 35 and the cavity body 34 in this embodiment are an integral structure to achieve high structural strength.

[0092] Further optional, such as Figure 3As shown, the connecting channel 351 includes a first section 3511 and a second section 3512 arranged at an angle. The second section 3512 can be coaxially arranged with the cooling inlet 31. The channel opening of the first section 3511, facing away from the second section 3512, communicates with the cooling cavity 10. Thus, the extension direction of the second section 3512 can be the axial direction of the cavity body 34, thereby making the extension direction of the pipe connecting the cooling inlet 31 approximately the same as the extension direction of the cable 2. This reduces the radial space required by the liquid-cooled charging system using the terminal assembly 100, improving the miniaturization of the liquid-cooled charging system.

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

[0094] For example, the surface of the adapter structure 35 facing away from the cavity body 34 is provided with a sealing hole 352, which communicates with the second section 3512. The cooling cavity 3 also includes a sealing screw 37 that is screwed into the sealing hole 352. When it is necessary to release the cooling medium in the cooling cavity 10, 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, thereby emptying the cooling cavity 3.

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

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

[0097] Example 2

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

[0099] Specifically, such as Figures 7 to 9 As shown, the plug-in end 11 of the conductive terminal 1 in this embodiment is rectangular rather than cylindrical, in order to accommodate the case where the slot is rectangular.

[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 those in Embodiment 1 and have similar beneficial effects, and will not be described in detail here.

[0102] Example 3

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

[0104] For example, Figure 10 and Figure 11 The liquid-cooled charging system provided in this embodiment includes a head structure 200 and a tail structure 300. Both the head structure 200 and the tail structure 300 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, such as Figure 11 As shown, the head structure 200 includes two terminal assemblies 100, and the tail structure 300 also includes two terminal assemblies 100. Optionally, both terminal assemblies 100 of the head structure 200 can be the terminal assemblies 100 in Embodiment 1, and both terminal assemblies 100 of the tail structure 300 can be the terminal assemblies 100 in Embodiment 2.

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

[0107] For example, each end of the collection cavity 500 is connected to a main pipeline 410, the cooling inlet 31 of the two terminal assemblies 100 of the head structure 200 is connected to one of the main pipelines 410 via a tee 600 and two branch pipelines 420, and the cooling inlet 31 of the two terminal assemblies 100 of the tail structure 300 is also connected to the other main pipeline 410 via a tee 600 and two branch pipelines 420.

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

[0109] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A terminal assembly, characterized in that, include: The conductive terminal (1) has a plug-in end (11) and a connection end (12). Cable (2) is electrically connected to the connection end (12); A cooling cavity (3) has a cooling inlet, and one end of the cooling cavity (3) is sealed and sleeved to the connecting end (12), and the other end of the cooling cavity (3) is sealed and sleeved to the end of the cable (2) used to connect 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) that communicates with the cooling inlet, and the cooling cavity (10) is provided with a cooling medium; The cable (2) is provided with a cooling channel (21), the cooling channel (21) has a channel opening (211) on the surface of the cable (2), the channel opening (211) is located in the part of the cable (2) located in the cooling cavity (3) and is connected to the cooling cavity (10); the terminal assembly also includes a support structure (4), the support structure (4) is located in the cooling channel (21) and is provided with a support through hole (41) connecting the cooling channel (21), the support structure (4) is used to support the cable (2).

2. The terminal assembly according to claim 1, characterized in that, The connecting end (12) includes a body part (121) and a connecting part (122); the cooling cavity (3) is sealed and fitted onto the body part (121), and the body part (121), the cable (2) and the cooling cavity (3) cooperate with each other to form a cooling cavity (10) that communicates with the cooling inlet; the connecting part (122) is located in the cooling cavity (10).

3. The terminal assembly according to claim 2, characterized in that, The cable (2) has a conductive part (22) at one end facing the conductive terminal (1), and the conductive part (22) is stacked and electrically connected with the connecting part (122); the conductive part (22) is located in the cooling cavity (10).

4. The terminal assembly according to claim 1, 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) that mates with the assembly hole (32). The terminal assembly also includes a connecting bolt (5), which 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).

5. The terminal assembly according to claim 4, characterized in that, The terminal assembly further includes a first sealing component (6), which is sleeved on the connecting end (12) and used to seal the gap between the outer peripheral surface of the connecting end (12) and the inner peripheral surface of the cooling cavity (3); the first sealing component (6) is located on the side of the connecting bolt (5) facing the cooling cavity (10).

6. The terminal assembly according to claim 1, characterized in that, The outer peripheral surface of the connecting end (12) is provided with a stop (124), which is used to abut against the end face 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 further includes a second sealing component (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 component (7) is provided with a limiting protrusion (71), and the other end is connected to the cable (2); the outer wall of the cooling cavity (3) is provided with a limiting groove (33), and the limiting protrusion (71) is engaged in the limiting groove (33).

7. The terminal assembly according to claim 1, characterized in that, The cooling cavity (3) includes a cavity body (34), a transition structure (35) and a sealing joint (36). One end of the cavity body (34) is sealed and sleeved to the connection end (12), and the other end of the cavity body (34) is sealed and sleeved to 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 adapter structure (35) is connected to one side of the cavity body (34), and the adapter structure (35) has a connecting channel (351) that connects to the cooling cavity (10). The sealing joint (36) is sealed at the opening of the connecting channel (351) away from the cooling cavity (10). The cooling inlet is located at the sealing joint (36) and connected to the connecting channel (351).

8. A liquid-cooled charging system, characterized in that, Includes the terminal assembly as described in any one of claims 1-7.

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