Liquid cooling structure and charging gun

Abstract

The application provides a liquid cooling structure and a charging gun. The liquid cooling structure comprises a shell, a terminal and a cable. The shell is provided with an inner cavity. The shell further comprises an oil inlet hole and an oil outlet hole which are in communication with the inner cavity. The terminal is arranged on the shell and is provided with a crimping cavity which is in communication with the inner cavity. The cable comprises a plurality of wire bundles arranged in the shell. One end of the plurality of wire bundles extends into the crimping cavity and is connected to the terminal in a crimping manner. The other end of the plurality of wire bundles extends along the direction of the oil outlet hole. A wire bundle gap which is in communication with the crimping cavity is formed between the plurality of wire bundles. The oil inlet hole is connected to the insulating coolant which enters the crimping cavity. The insulating coolant flows through the wire bundle gap to the oil outlet hole to dissipate heat from the crimping end. The liquid cooling structure provided above can realize directional and efficient cooling of the heat source core area of the crimping connection between the cable and the terminal by the coolant entering the crimping cavity through the oil inlet hole and flowing through the wire bundle gap to directly contact and surround the crimping area.

Description

Technical Field

[0001] This application relates to the field of charger heat dissipation technology, and in particular to a liquid cooling structure. Background Technology

[0002] With the rapid development of the new energy vehicle industry and the continuous increase in the number of electric vehicles, the demand for high-power DC charging equipment is increasing. As a key component connecting electric vehicles and charging piles, DC charging guns operate under high current during charging and are prone to generating high heat due to prolonged power supply. If heat dissipation is not timely, it will affect charging efficiency and may even lead to thermal runaway, becoming a key factor affecting the safety and reliability of charging guns.

[0003] To address the aforementioned issues, existing technologies employ a cooling channel within the DC terminal, along with a cooling pipe to introduce an insulating cooling medium. The terminal is effectively cooled through a structure consisting of a threaded channel inside the terminal, flowing into an annular groove, and flowing out of the annular groove. Some solutions also insert the cooling pipe into the cable's outer sheath or core, achieving systematic cyclic cooling and enhancing overall heat dissipation.

[0004] However, the existing technologies still have some shortcomings. Most cooling paths are only located inside the terminals, providing cooling for cable winding and other similar setups. In practical applications, cable conductors are typically composed of multiple copper wires, and the area formed by the crimping of the conductor and terminal is the part where heat is most concentrated. Existing cooling structures cannot dissipate heat from the core of the heat source, resulting in limited cooling effectiveness. Therefore, there is an urgent need for a heat dissipation structure capable of cooling the core of the charging gun's heat source to solve the aforementioned problems. Utility Model Content

[0005] In view of this, it is necessary to provide a liquid cooling structure that can dissipate heat from the core of the charging gun's heat source in order to solve the above problems.

[0006] Embodiments of this application provide a liquid-cooled structure, including a housing, terminals, and cables.

[0007] The housing has an inner cavity, and the housing also includes an oil inlet and an oil outlet that communicate with the inner cavity; Terminals are provided on the housing, and a crimping cavity communicating with the inner cavity is provided; The cable includes a multi-strand wire harness disposed within the housing. One end of the multi-strand wire harness extends into the crimping cavity and is crimped and connected to the terminal, while the other end extends along the direction of the oil outlet hole. The multiple strands of wire harness are surrounded to form a wire harness gap that connects to the crimping cavity. The oil inlet allows insulating coolant to enter the crimping cavity, and the insulating coolant flows through the wire harness gap to the oil outlet to dissipate heat from the crimped end.

[0008] In at least one embodiment of this application, when the insulating coolant flows into the inner cavity through the oil inlet, the insulating coolant is split into a first coolant and a second coolant. The first coolant flows into the wire harness gap through the crimping cavity, the second coolant fills the inner cavity, and both the first coolant and the second coolant flow out along the oil outlet.

[0009] In at least one embodiment of this application, a through hole is provided on the side of the terminal near the oil inlet hole, the through hole connecting the crimping cavity and the inner cavity, and the first coolant flows into the crimping cavity through the through hole.

[0010] In at least one embodiment of this application, a crimping area is formed between the crimping cavity and the crimping end of the cable, the oil inlet is directly opposite the crimping area, and the projection of the oil inlet along its axial direction is offset from the through hole; The insulating coolant is introduced into contact with the surface of the crimping area to form the first coolant flowing into the through hole, so as to prevent the first coolant from directly entering the crimping cavity.

[0011] In at least one embodiment of this application, the crimping cavity further includes a buffer zone disposed parallel to the crimping area along its length direction, the buffer zone communicating with the through hole and the wire harness gap, the first coolant flowing in through the through hole and filling the buffer zone to immerse the crimping end of the terminal.

[0012] In at least one embodiment of this application, the terminal further includes an inclined surface disposed within the crimping cavity, the inclined surface being located on the side of the buffer zone opposite to the crimping area; The crimping cavity is recessed inward along its length to form the inclined surface, which is arranged around the inner wall of the crimping cavity.

[0013] In at least one embodiment of this application, the inner cavity cover is disposed on the terminal and is sealed to the terminal. The side wall of the terminal is also provided with a sealing groove, and a sealing element is provided in the sealing groove to interfere with the inner wall of the housing, so as to prevent the insulating coolant from flowing into the end of the terminal away from the crimping cavity.

[0014] In at least one embodiment of this application, the liquid cooling mechanism further includes a circulation assembly, which includes an oil inlet pipe, a drive component, and an oil outlet pipe arranged thereon. The oil inlet pipe is sealed to the oil inlet hole, and the oil outlet pipe is sealed to the oil outlet hole to form a condensation circuit to continuously remove heat.

[0015] In at least one embodiment of this application, the terminal includes a first terminal and a second terminal arranged side by side, and two circulation components are respectively disposed on the first terminal and the second terminal to improve heat dissipation efficiency.

[0016] A charging gun includes a liquid-cooled structure as described above.

[0017] The liquid cooling structure described above connects the cable crimping end to the terminal within the crimping cavity, and forms a wire harness gap that connects the crimping cavity between multiple wire strands. Coolant enters the crimping cavity through the oil inlet and flows through the wire harness gap, directly contacting and surrounding the crimping area. This enables directional and efficient cooling of the core heat source area—the cable-terminal crimping connection. This structure fully utilizes the natural gaps formed by the multiple wire strands as the coolant flow path, creating a large-area heat exchange contact between the coolant and the copper conductor, significantly improving heat dissipation efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional exploded view of a liquid cooling structure according to an embodiment of this application.

[0019] Figure 2 for Figure 1 A three-dimensional view of the liquid cooling structure described above.

[0020] Figure 3 for Figure 2 A cross-sectional view of the liquid cooling structure described above.

[0021] Figure 4 for Figure 3 An enlarged view of part A of the liquid cooling structure described above.

[0022] Figure 5 for Figure 3 A BB cross-sectional view of the liquid cooling structure described above.

[0023] Explanation of main component symbols 100. A liquid cooling structure; 10. Housing; 11. Inner cavity; 12. Oil outlet; 13. Oil inlet; 20. Terminal; 21. Crimping cavity; 211. Crimping area; 212. Buffer zone; 22. Through hole; 23. Inclined surface; 24. Sealing groove; 25. First terminal; 26. Second terminal; 30. Cable; 31. Wire harness; 311. Wire harness gap. Detailed Implementation

[0024] The embodiments of this application will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0025] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may also have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may also have an intervening component. The terms "top," "bottom," "upper," "lower," "left," "right," "front," "back," and similar expressions used in this article are for illustrative purposes only.

[0026] Embodiments of this application provide a liquid-cooled structure, including a housing, terminals, and cables.

[0027] The housing has an inner cavity, and the housing also includes an oil inlet and an oil outlet that communicate with the inner cavity; Terminals are provided on the housing, and a crimping cavity communicating with the inner cavity is provided; The cable includes a multi-strand wire harness disposed within the housing. One end of the multi-strand wire harness extends into the crimping cavity and is crimped and connected to the terminal, while the other end extends along the direction of the oil outlet hole. The multiple strands of wire harness are surrounded to form a wire harness gap that connects to the crimping cavity. The oil inlet allows insulating coolant to enter the crimping cavity, and the insulating coolant flows through the wire harness gap to the oil outlet to dissipate heat from the crimped end.

[0028] The liquid cooling structure described above connects the cable crimping end to the terminal within the crimping cavity, and forms a wire harness gap that connects the crimping cavity between multiple wire strands. Coolant enters the crimping cavity through the oil inlet and flows through the wire harness gap, directly contacting and surrounding the crimping area. This enables directional and efficient cooling of the core heat source area—the cable-terminal crimping connection. This structure fully utilizes the natural gaps formed by the multiple wire strands as the coolant flow path, creating a large-area heat exchange contact between the coolant and the copper conductor, significantly improving heat dissipation efficiency.

[0029] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please see Figures 1-5 An embodiment of this application provides a liquid cooling structure 100, including a housing 10, a terminal 20, and a cable 30.

[0031] The housing 10 has an inner cavity 11, and the housing 10 also includes an oil inlet 13 and an oil outlet 12 that communicate with the inner cavity 11; Terminal 20 is provided on the housing 10 and has a crimping cavity 21 that communicates with the inner cavity 11; The cable 30 includes a multi-strand wire harness 31 disposed in the housing 10. One end of the multi-strand wire harness 31 extends into the crimping cavity 21 and is crimped and connected to the terminal 20, and the other end extends along the direction of the oil outlet hole 12. The multiple strands of wire harness 31 are surrounded to form a wire harness gap 311 that connects to the crimping cavity 21. The oil inlet 13 allows insulating coolant to enter the crimping cavity 21. The insulating coolant flows through the wire harness gap 311 to the oil outlet 12 to dissipate heat from the crimping end.

[0032] Preferably, in this embodiment, it should be noted that the liquid cooling structure mainly includes a housing 10, a terminal 20, and a cable 30. The housing 10 has an internal cavity 11 for containing and guiding the flow of coolant. The housing 10 has an oil inlet 13 and an oil outlet 12 for introducing and discharging coolant, respectively. The terminal 20 is disposed on the housing 10 and has a crimping cavity 21 inside it. The crimping cavity 21 communicates with the internal cavity 11 of the housing 10, serving as the connection and heat dissipation area between the crimped end of the cable 30 and the terminal 20. The cable 30 is composed of a multi-strand wire harness 31, one end of which passes through the crimping cavity 21 and is crimped to the terminal 20, while the other end extends towards the oil outlet 12.

[0033] Furthermore, the multi-strand wire harnesses 31 are not a tightly packed solid structure before crimping, but rather naturally have tiny gaps. These gaps do not disappear after crimping; they simply become tighter than in their natural, relaxed state. In this embodiment, the gaps between these wire harnesses 31 serve as liquid cooling channels, forming wire harness gaps 311 that connect to the crimping cavity 21. After entering through the oil inlet 13, the coolant first enters the crimping cavity 21 area and seeps into the gap channels between the wire harnesses 31, then flows along the direction of the wire harnesses 31 to the oil outlet 12 for discharge, thus completing the cooling of the crimping area 211 and its surrounding conductor area.

[0034] Specifically, implementing the technical solution of this embodiment can significantly improve the cooling efficiency of the charging gun crimping area 211. Its technical effects are specifically reflected in the following aspects: The coolant's design, flowing through the wire harness gap 311, ensures a direct cooling path to the area of ​​highest heat concentration formed by the crimping of the cable 30 and terminal 20. This allows for cooling from the initial stages of heat generation, directly targeting the core heat source. Within the crimping cavity 21, the coolant not only contacts the outer wall of the terminal 20 but also permeates the multiple strands of the wire harness 31, forming a heat exchange contact surface with each copper conductor. This significantly increases the heat exchange area and efficiency, achieving efficient and uniform heat dissipation. The coolant first covers the crimped end within the crimping cavity 21 and then flows out slowly through the wire harness gap 311, minimizing the risk of localized high flow rates or heat accumulation in dead zones. This helps maintain flow stability and control conductor temperature rise.

[0035] In summary, this embodiment effectively solves the technical problem that traditional charging gun heat dissipation systems cannot cover the core area of ​​the crimping joint through a unique structural layout and flow channel design, achieving efficient and direct cooling of the high-heat area at the crimping joint, and improving the overall system's thermal management level and operational safety.

[0036] In one specific embodiment, when the insulating coolant flows into the inner cavity 11 through the oil inlet 13, the insulating coolant is split into a first coolant and a second coolant. The first coolant flows into the wire harness gap 311 through the crimping cavity 21, and the second coolant fills the inner cavity 11. Both the first coolant and the second coolant flow out along the oil outlet 12.

[0037] Preferably, in this embodiment, it should be noted that the liquid cooling structure, based on the original structure, has a diversion design for the flow path of the insulating coolant, so that after entering the inner cavity 11 of the housing 10, it forms two coolant flow directions, namely the first coolant and the second coolant.

[0038] The insulating coolant enters the inner cavity 11 of the housing 10 through the oil inlet 13. A portion of it (i.e., the first coolant) flows into the wire harness gap 311 of the cable 30 through the crimping cavity 21 of the terminal 20 located on the housing 10. The wire harness 31 is composed of multiple strands of copper wire or copper wire bundle 31, with natural gaps between them. These gaps serve as liquid flow paths, and the first coolant flows along these paths to directly cool the crimping end and the copper conductor portion.

[0039] Furthermore, the remaining coolant (i.e., the second coolant) does not enter the crimping cavity 21 after flowing into the inner cavity 11, but instead remains or flows slowly within the inner cavity 11, filling the space surrounding the terminal 20 and indirectly cooling the exterior of the terminal 20 and the surrounding housing 10. Finally, after completing their respective heat exchange paths, the first and second coolants are discharged together through the oil outlet 12 provided in the housing 10, achieving recycling.

[0040] Specifically, through a coolant diversion design, one stream flows deep into the crimping area 211 for direct cooling of the conductor core, while the other stream provides auxiliary cooling to indirect heat exchange areas such as the outer surface of the terminal 20 within the inner cavity 11, achieving simultaneous cooling of both the core and surrounding areas. The first coolant flows through the crimping cavity 21 and the wire harness gap 311, creating an organized and directional main cooling path; the second coolant fills the inner cavity 11 area, forming a stable coolant layer, which helps suppress turbulence and local disturbances, improving the stability of the overall heat dissipation system. Furthermore, this design does not rely on an active control diversion device; it achieves natural liquid diversion solely through the structural arrangement of the housing 10 and the crimping cavity 21, offering strong adaptability and facilitating processing and integration.

[0041] In one specific embodiment, a through hole 22 is also provided on the side of the terminal 20 near the oil inlet hole 13. The through hole 22 connects the crimping cavity 21 and the inner cavity 11, and the first coolant flows into the crimping cavity 21 through the through hole 22.

[0042] Preferably, in this embodiment, it should be noted that a through hole 22 is provided on the side of the terminal 20 near the oil inlet hole 13. The through hole 22 is used to connect the crimping cavity 21 of the terminal 20 with the inner cavity 11 of the housing 10, so that the coolant can flow from the inner cavity 11 into the crimping cavity 21 through the through hole 22, thus forming an internal flow cooling structure.

[0043] Specifically, the insulating coolant first enters the inner cavity 11 of the housing 10 through the oil inlet 13. As the coolant flows within the inner cavity 11, it encounters the through-hole 22 located on the terminal 20. A portion of this coolant (i.e., the first coolant) is then guided through the through-hole 22 into the crimping cavity 21, thereby immersing the crimping area 211 within the crimping cavity 21 that connects to the cable 30. Because the through-hole 22 is located close to the oil inlet 13, the coolant can be quickly transported to the crimping area 211 via a shorter path after entering, achieving rapid cooling of the heat-generating core area.

[0044] In summary, the through-hole 22 allows the coolant to quickly enter the crimping cavity 21 after entering the housing 10, shortening the flow path from the oil inlet 13 to the crimping area 211 and improving cooling efficiency. Through structural flow diversion (through-hole 22), the first coolant preferentially enters the crimping cavity 21 and flows towards the gap in the cable 30, forming a stable directional flow, reducing ineffective coolant retention within the cavity, and improving liquid circulation efficiency. The through-hole 22 is directly located on the terminal 20 body, eliminating the need for additional pipes or components, which facilitates the integrated design of the overall cooling system and promotes standardized processing and assembly.

[0045] In one specific embodiment, a crimping area 211 is formed between the crimping cavity 21 and the crimping end of the cable 30, the oil inlet 13 is directly opposite the crimping area 211, and the projection of the oil inlet 13 along its axial direction is offset from the through hole 22; The insulating coolant is introduced into the surface of the crimping area 211 to form the first coolant flowing into the through hole 22, so as to avoid the first coolant directly entering the crimping cavity 21.

[0046] Preferably, in this embodiment, it should be noted that the crimping cavity 21 and the crimping end of the cable 30 together constitute the crimping area 211, and the position of the oil inlet 13 is designed to be directly opposite the crimping area 211 (the crimping area is a region, and the oil inlet is directly opposite the crimping area), so that the insulating coolant entering the housing 10 can directly contact the surface of the crimping area 211 to achieve rapid cooling of the core part of the heat source.

[0047] Furthermore, the projection of the oil inlet hole 13 along its axial direction is staggered with that of the through hole 22. That is, after the coolant is injected into the oil inlet hole 13, it first comes into full contact with the pressing area 211, forming a stable coolant layer or liquid flow area on the surface. Subsequently, some of the liquid flows into the through hole 22 and into the pressing cavity 21. This structure avoids the coolant from directly impacting the through hole 22 and flowing into the pressing cavity 21 after entering, thus preventing problems such as flow around, short circuit, or turbulence.

[0048] Specifically, the oil inlet 13 is directly opposite the crimping area 211, allowing the coolant to first cover and contact the crimping end, preferentially carrying away the most concentrated heat and effectively controlling the temperature rise in the contact area between the conductor and the terminal 20. By axially projecting and staggering the arrangement, the coolant will not directly impact the through hole 22 and enter the crimping cavity 21, thereby avoiding turbulence or potential electrical performance hazards caused by short-path flow of the coolant (although the coolant is an insulating liquid, structural safety still requires redundant design).

[0049] In one specific embodiment, the crimping cavity 21 further includes a buffer zone 212 arranged parallel to the crimping area 211 along its length direction. The buffer zone 212 connects the through hole 22 and the wire harness gap 311. The first coolant flows into and fills the buffer zone 212 through the through hole 22 to immerse the crimping end of the terminal 20.

[0050] Preferably, in this embodiment, it should be noted that the crimping cavity 21 not only has a crimping area 211 for crimping the terminal 20 and the conductor of the cable 30, but also further has a buffer zone 212 arranged parallel to the crimping area 211 along its length. The buffer zone 212 forms part of the crimping cavity 21 and is located between the through hole 22 and the wire harness gap 311, forming a transition space for coolant flow.

[0051] Furthermore, the through-hole 22 is located on the side of the terminal 20 near the oil inlet 13 and connects to the buffer zone 212. This allows the first coolant flowing out of the through-hole 22 to first enter the buffer zone 212, gradually filling it to form a stable liquid level before flowing into the gap between the wire harnesses 31, thus connecting the subsequent cooling path. By setting the buffer zone 212 parallel to the crimping area 211 and setting the flow sequence in the liquid flow direction as "through-hole 22 → buffer zone 212 → wire harness gap 311", it is ensured that the first coolant can fully cover and immerse the surface of the crimping end before entering the gap between the wire harnesses 31, forming a continuous liquid cooling contact layer.

[0052] Specifically, the buffer zone 212 serves as the intermediate space between the through-hole 22 and the wire harness gap 311, allowing the first coolant to form a coolant "pool" around the crimp end before flowing into the cable 30 gap. This achieves enveloping cooling of the crimp area 211, improving cooling efficiency. The liquid's residence and diffusion within the buffer zone 212 helps form a more uniformly distributed liquid layer, ensuring that all areas around the crimp area 211 are fully covered by coolant, preventing localized overheating.

[0053] In summary, this embodiment achieves full coverage, depth, and efficient heat dissipation of the crimped end of the terminal 20 and the cable 30 by setting a buffer zone 212 on the side of the crimping area 211 and making the buffer zone 212, through hole 22 and wire harness gap 311 form a continuous cooling path, effectively solving the problem of insufficient cooling of the core heat source area in the prior art.

[0054] In one specific embodiment, the terminal 20 further includes an inclined surface 23 disposed within the crimping cavity 21, the inclined surface 23 being located on the side of the buffer zone 212 opposite to the crimping area 211; The crimping cavity 21 is recessed inward along its length to form the inclined surface 23, and the inclined surface 23 is arranged around the inner wall of the crimping cavity 21.

[0055] Preferably, in this embodiment, it should be noted that the terminal 20 not only has a crimping cavity 21 for accommodating the crimping end of the cable 30, but also has an inclined surface 23 further provided inside the crimping cavity 21. The inclined surface 23 is provided on the side of the buffer zone 212 away from the crimping area 211, and is formed by locally concave treatment of the crimping cavity 21 structure in the length direction, and is distributed in a ring shape on the inner wall of the crimping cavity 21.

[0056] The structural features formed by the inclined surface 23 enable it to guide the direction of fluid flow even when installed flat (i.e., the crimping cavity 21 is arranged horizontally), thus avoiding dead zones or stagnant areas of coolant on the side away from the crimping end, thereby achieving effective drainage and stable flow control of coolant.

[0057] Specifically, the inclined surface 23 is located at the end of the buffer zone 212. By changing the local morphology of the cavity, a guiding slope is formed, so that the coolant entering the buffer zone 212 can be guided to flow in the direction of the gap between the cables 30 under the action of natural gravity and flow pressure, effectively avoiding liquid deposition or circulation dead zone at the end of the buffer zone 212.

[0058] Optimizing coolant distribution and improving cooling efficiency: The inclined structure guides the coolant to form a flow gradient within the buffer zone 212, which helps to evenly distribute the coolant throughout the crimping cavity 21, enhancing the surrounding cooling coverage of the crimping end and improving heat exchange efficiency. Compared to an overall inclined arrangement, by setting a local inclined surface 23 inside the crimping cavity 21, the flow guiding function can be achieved without increasing the volume of the housing 10 or the installation complexity, which is beneficial for miniaturized and modular product design.

[0059] In summary, this embodiment, through the structural design of having an inclined surface 23 in the crimping cavity 21, enables the coolant to flow naturally along the inclined surface 23 even under horizontal arrangement conditions, thereby effectively improving the orderliness and stability of the liquid flow in the buffer zone 212, further enhancing the cooling capacity of the crimping end area, and improving the overall performance of the heat dissipation system.

[0060] In one specific embodiment, the inner cavity 11 covers the terminal 20 and is sealed to the terminal 20. The side wall of the terminal 20 is also provided with a sealing groove 24. The sealing groove 24 is provided with a sealing element (not shown) that is interference-fitted with the inner wall of the housing 10 to prevent the insulating coolant from flowing into the end of the terminal 20 away from the crimping cavity 21.

[0061] Preferably, in this embodiment, it should be noted that the inner cavity 11 is designed to cover the outside of the terminal 20. Specifically, the inner cavity 11 area of ​​the housing 10 extends and covers the end of the terminal 20 near the crimping cavity 21. The inner cavity 11 and the terminal 20 are sealed together to achieve liquid tightness, preventing coolant leakage or seepage into areas that should not be in contact.

[0062] Furthermore, to enhance sealing performance and achieve a stable structural fit, a sealing groove 24 is provided on the side wall of the terminal 20, and a sealing element (such as an O-ring or other elastic sealing structure) is installed in the sealing groove 24. The sealing element forms an interference fit with the inner wall of the housing 10 in the radial direction, that is, the sealing element is slightly larger than the size of the inner cavity 11 of the housing 10 during installation, and a high-strength sealing state is formed by compression. The sealing structure is mainly set at the end of the terminal 20 near the crimping cavity 21 to ensure that after the coolant enters the gap between the crimping cavity 21 and the cable 30, it will not flow back or seep into the side of the terminal 20 away from the crimping cavity 21, thereby avoiding any impact on the conductive structure or the terminal area.

[0063] Specifically, by providing a seal on the side of terminal 20 away from the crimping cavity 21, the insulating coolant is effectively prevented from entering the interior of terminal 20 or the lead connection area, avoiding potential risks of electric shock, insulation breakdown, or corrosion caused by coolant contact with the electrical connection parts of terminal 20. The design of sealing groove 24 + seal + interference fit improves the adaptability of the liquid system to pressure and temperature fluctuations, maintaining a good sealing effect even under high flow rate or high temperature operating conditions, preventing coolant leakage.

[0064] In one specific embodiment, the liquid cooling mechanism further includes a circulation assembly, which includes an oil inlet pipe, a drive component, and an oil outlet pipe arranged thereon. The oil inlet pipe is sealed to the oil inlet hole 13, and the oil outlet pipe is sealed to the oil outlet hole 12, for forming a condensation circuit to continuously remove heat.

[0065] Preferably, in this embodiment, it should be noted that the liquid cooling structure further includes a circulation assembly (not shown in the figure). This assembly is mainly used to achieve a closed-loop circulation of the insulating coolant, ensuring that heat can be continuously and effectively removed from the heat-generating parts. The circulation assembly specifically includes: Oil inlet pipe: One end is sealed and connected to the oil inlet hole 13 of the housing 10, and the other end is connected to the liquid source or cooling device in the cooling system, used to introduce the low-temperature insulating coolant into the liquid cooling structure. Drive unit: Located between the oil inlet and outlet pipes, it is usually a micro pump, turbo pump or magnetic pump, etc., to provide stable flow driving force and ensure continuous circulation of coolant; Oil outlet pipe: One end is sealed and connected to the oil outlet hole 12 of the housing 10, which guides the high-temperature coolant after absorbing heat to the condensation system or liquid storage device for cooling and recycling.

[0066] Specifically, the entire circulation assembly is sealed together to form a complete condensation circuit. Under the drive of the driving component, the insulating coolant enters the oil inlet pipe from the cryogenic liquid source, then flows through the oil inlet hole 13 into the crimping cavity 21 of the housing 10 and the heat dissipation channel of the cable 30. After absorbing heat, it is discharged through the oil outlet hole 12 and returns to the cooling device through the oil outlet pipe for condensation treatment, thus completing one cooling cycle.

[0067] In one specific embodiment, the terminal 20 includes a first terminal 25 and a second terminal 26 arranged side by side, and two circulation components are respectively disposed on the first terminal 25 and the second terminal 26 to improve heat dissipation efficiency.

[0068] Preferably, in this embodiment, it should be noted that the terminal 20 in the liquid cooling structure is not a single structure, but includes a first terminal 25 and a second terminal 26 (positive and negative terminals 20) arranged in parallel. These two sets of terminals 20 are used to connect to two independent cables 30 respectively. In order to further improve the cooling efficiency of the crimping area 211 of each terminal 20 and the cable 30, two circulation components are independently provided on the first terminal 25 and the second terminal 26 respectively.

[0069] Furthermore, each circulation component includes an independent oil inlet pipe, a drive component (such as a micro pump), and an oil outlet pipe, which are respectively sealed and connected to the oil inlet hole 13 and oil outlet hole 12 of the liquid-cooled housing 10 of the corresponding terminal 20, forming two independent liquid-cooled circuits. This allows each terminal 20 to obtain its own dedicated cooling path, with the coolant circulating within its respective circuit, preventing heat load superposition or uneven cooling problems caused by multiple heat sources being cooled in series.

[0070] Specifically, each terminal 20 has a dedicated liquid cooling path to avoid thermal interference from multiple heat sources in the same circuit. The first terminal 25 and the second terminal 26 often carry high current transmission simultaneously, and the dual-path heat dissipation can significantly reduce the total thermal resistance. The two independent circuits can adjust the cooling flow rate and flow rate according to their respective operating conditions, providing flexible control and preventing changes in the heat load at one end from affecting the cooling performance of the entire system.

[0071] A charging gun includes all the structures in the liquid-cooled structure 100 described above. Since this embodiment includes all the features of the above embodiments, it possesses all the beneficial effects of the above embodiments, and will not be repeated here. The above description is merely an embodiment of this application. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of this application, but these improvements all fall within the protection scope of this application.

Claims

1. A liquid-cooled structure, characterized in that, include: The housing has an inner cavity, and the housing also includes an oil inlet and an oil outlet communicating with the inner cavity; Terminals are provided on the housing and have crimping cavities that communicate with the inner cavity; The cable includes a multi-strand wire harness disposed within the housing, with one end of the multi-strand wire harness extending into the crimping cavity and crimped to the terminal, and the other end extending along the direction of the oil outlet hole; The multiple strands of wire harness are surrounded to form a wire harness gap that connects to the crimping cavity. The oil inlet allows insulating coolant to enter the crimping cavity, and the insulating coolant flows through the wire harness gap to the oil outlet to dissipate heat from the crimped end.

2. The liquid cooling structure according to claim 1, characterized in that, When the insulating coolant flows into the inner cavity through the oil inlet, the insulating coolant is divided into a first coolant and a second coolant. The first coolant flows into the wire harness gap through the crimping cavity, the second coolant fills the inner cavity, and both the first coolant and the second coolant flow out along the oil outlet.

3. The liquid cooling structure according to claim 2, characterized in that, The terminal is also provided with a through hole on the side near the oil inlet hole. The through hole connects the crimping cavity and the inner cavity, and the first coolant flows into the crimping cavity through the through hole.

4. The liquid cooling structure according to claim 3, characterized in that, The crimping cavity forms a crimping area with the crimping end of the cable, the oil inlet is directly opposite the crimping area, and the projection of the oil inlet along its axial direction is offset from the through hole; The insulating coolant is introduced into contact with the surface of the crimping area to form the first coolant flowing into the through hole, so as to prevent the first coolant from directly entering the crimping cavity.

5. A liquid cooling structure according to claim 4, characterized in that, The crimping cavity further includes a buffer zone arranged parallel to the crimping area along its length direction. The buffer zone connects the through hole and the gap between the wire harness. The first coolant flows into the buffer zone through the through hole and fills the buffer zone to immerse the crimped end of the terminal.

6. The liquid cooling structure according to claim 5, characterized in that, The terminal also includes an inclined surface disposed within the crimping cavity, the inclined surface being located on the side of the buffer zone opposite to the crimping area; The crimping cavity is recessed inward along its length to form the inclined surface, which is arranged around the inner wall of the crimping cavity.

7. The liquid cooling structure according to claim 1, characterized in that, The inner cavity is provided on the terminal and is sealed to the terminal. The side wall of the terminal is also provided with a sealing groove. The sealing groove is provided with a sealing element that is interference-fitted with the inner wall of the housing to prevent the insulating coolant from flowing into the end of the terminal away from the crimping cavity.

8. The liquid cooling structure according to claim 1, characterized in that, The liquid cooling structure also includes a circulation assembly, which includes an oil inlet pipe, a drive component, and an oil outlet pipe arranged thereon. The oil inlet pipe is sealed to the oil inlet hole, and the oil outlet pipe is sealed to the oil outlet hole to form a condensation circuit to continuously remove heat.

9. A liquid cooling structure according to claim 8, characterized in that, The terminal includes a first terminal and a second terminal arranged side by side, and two circulation components are respectively disposed on the first terminal and the second terminal to improve heat dissipation efficiency.

10. A charging gun, characterized in that, Includes a liquid cooling structure as described in any one of claims 1-9.

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