Liquid cooling terminal structure and charging gun

Abstract

The utility model discloses a liquid cooling terminal structure and a charging gun, the liquid cooling terminal structure comprises a terminal assembly, a liquid cooling pipe, a cable, a water inlet joint, a backflow pipe and a water return joint, the terminal assembly comprises a main body piece, an insertion cavity is formed in the main body piece, the water inlet joint is installed on the main body piece, one end of the water inlet joint is communicated with the insertion cavity, and the other end of the water inlet joint is connected with the water inlet pipe; the main body piece extends towards a first direction from the mounting position of the water inlet connector to form a crimping part, a crimping cavity is formed in the crimping part, the crimping cavity is connected and communicated with the insertion cavity, the cable penetrates through the insertion cavity, extends to the crimping cavity and is fixed in the crimping cavity through crimping, a gap is formed between the cable and the inner wall of the insertion cavity, the main body piece is sleeved with the liquid cooling pipe, and the liquid cooling pipe is connected with the water inlet connector. The output end of the liquid cooling pipe and the input end of the return pipe are connected, one end of the return water connector is connected to the output end of the return pipe, and the other end of the return water connector is connected to the return water pipe. A simple and convenient assembling process is adopted, the assembling and manufacturing difficulty is reduced, and meanwhile the material cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of charging guns, and in particular to a liquid-cooled terminal structure and a charging gun. Background Art

[0002] When current passes through the power terminals of traditional charging guns, it is easy to cause the terminals and cables to heat up, which limits the charging power. In order to achieve higher charging power and charge electric vehicles faster, liquid-cooled charging guns came into being. The liquid cooling system is used to cool the terminals and cables, thereby improving the current carrying capacity of the terminals and cables. There are two main ways to cool the terminals and cables with liquid cooling. The first is to add a liquid cooling tube to the cable separately and then connect it to the terminal for cooling. The second is to directly insert the power cable into the liquid cooling tube and directly immerse the cable for cooling. The first method is relatively simple in technology, but the cooling effect is poor. It is easy to cause charging to be suspended due to over-temperature protection, affecting charging efficiency. Excessive temperature can easily accelerate the aging of charging gun parts and shorten the service life of the charging gun. Because the cable is in the liquid cooling tube, the second method is relatively complicated to assemble and crimp the terminals. The assembly process is complicated and time-consuming, and the assembly cost is high. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a liquid-cooled terminal structure and a charging gun, which adopt a simple and convenient assembly process to reduce the difficulty of assembly and manufacturing while reducing material costs.

[0004] To achieve the above objectives, this application adopts the following technical solutions:

[0005] On the one hand, a liquid-cooling terminal structure is provided, comprising: a terminal assembly, a liquid-cooling tube, a cable, a water inlet joint, a return pipe and a return water joint, the terminal assembly comprising a main body, a plug-in cavity formed in the main body, the water inlet joint is installed on the main body, and one end is connected to the plug-in cavity, and the other end is connected to the water inlet pipe, the main body extends from the installation position of the water inlet joint toward a first direction to form a crimping portion, a crimping cavity is formed in the crimping portion, the crimping cavity is connected and connected to the plug-in cavity, the cable extends through the plug-in cavity to the crimping cavity, and is fixed in the crimping cavity by crimping, a gap is formed between the cable and the inner wall of the plug-in cavity, the liquid cooling tube is sleeved on the main body along the first direction and wraps the cable inside, the output end of the liquid cooling tube is connected to the input end of the return pipe, one end of the return water joint is connected to the output end of the return pipe, and the other end is connected to the return pipe.

[0006] Furthermore, it also includes a clamp, which clamps the liquid cooling pipe to the main body.

[0007] Furthermore, it also includes a sealing ring, which is arranged between the outer wall of the main body and the inner wall of the liquid cooling tube.

[0008] Furthermore, a connecting portion is protruded from the main body, and the connecting portion is connected to the water inlet joint through a thread.

[0009] Furthermore, it also includes a cooling water tank, which is provided with a return water port and a water outlet, the water outlet is connected to the water inlet pipe, and the return water port is connected to the return water pipe.

[0010] Furthermore, a middle partition is provided in the cooling water tank, and the middle partition divides the interior of the cooling water tank into a return water chamber and a cold water chamber. The return water chamber is connected to the return water port, and the cold water chamber is connected to the water outlet.

[0011] Furthermore, it also includes a accommodating component, which includes an expansion piece made of elastic material. The expansion piece is arranged at one end of the liquid cooling tube away from the terminal assembly, and a accommodating cavity connected to the liquid cooling tube is formed in the expansion piece.

[0012] Furthermore, the accommodating assembly also includes a shell, the expansion piece is arranged inside the shell, and a gap is left between the outer wall of the expansion piece and the inner wall of the shell, and the expansion piece is provided with a connection port connected to the liquid cooling pipe.

[0013] Furthermore, it also includes a connecting piece, which is connected in series in the liquid cooling pipe. A first channel and a second channel are formed in the connecting piece. The two ends of the first channel are respectively connected to the liquid cooling pipe, and the second channel connects the first channel and the connecting port.

[0014] On the other hand, a charging gun is also provided, comprising the liquid-cooled terminal structure as described in any one of the above items.

[0015] The beneficial effects of the present application are as follows: the coolant enters the plug-in cavity of the main part through the water inlet joint, and the gap formed between the plug-in cavity and the cable allows the coolant to initially surround the cable. At the same time, the coolant continues to enter the crimping cavity along the cable, fully contacts the cable in the crimping cavity, and further absorbs the heat generated by the current passing through the cable. The cable is completely wrapped in the liquid cooling tube, and the coolant circulates in the liquid cooling tube, directly immersing the cable to cool it, effectively reducing the temperature of the cable. The flow path design of the coolant in the liquid cooling tube ensures that all parts of the cable can be evenly cooled, avoiding local overheating. The coolant that has undergone sufficient heat exchange flows out from the output end of the liquid cooling tube and enters the return pipe. The return pipe transports the coolant to the return water joint and finally returns to the coolant circulation system through the return pipe, completing a complete cooling cycle. When applied to a charging gun, during the charging process, the current is transmitted to the battery pack of the electric vehicle through the cable and terminal assembly. Due to the effective cooling effect of the liquid cooling system, the temperature of the terminal and cable is kept at a low level, thereby improving the current carrying capacity and charging efficiency of the charging gun. This application enhances thermal conductivity by increasing the contact area between the coolant and the conductor, preventing the charging gun from overheating and causing a decrease in charging efficiency. The overall structure is simpler and more reliable in manufacturing and assembly, and the manufacturing cost is low. It is also simpler and more convenient to install on the charging pile, without overly complicated assembly steps, and the sealing performance is more reliable. In addition, most of the components used are common parts in the market, which is convenient for maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0017] Figure 1 This is a three-dimensional diagram of the liquid-cooled terminal structure according to an embodiment of the present application;

[0018] Figure 2 This is a partial cross-sectional schematic diagram of the liquid-cooling terminal structure according to an embodiment of the present application;

[0019] Figure 3 This is a cross-sectional schematic diagram of the terminal assembly described in an embodiment of the present application;

[0020] Figure 4 This is a schematic diagram of the assembly of the receiving component and the connecting piece described in the embodiment of the present application.

[0021] In the figure: 1. Terminal assembly; 101. Main body; 102. Crimping part; 103. Insertion cavity; 104. Crimping cavity; 105. Connecting part; 2. Liquid cooling pipe; 3. Cable; 4. Water inlet joint; 5. Return pipe; 6. Return joint; 7. Clamp; 8. Sealing ring; 9. Accommodation assembly; 901. Expansion piece; 902. Shell; 903. Accommodation cavity; 10. Connecting piece; 1001. First channel; 1002. Second channel. DETAILED DESCRIPTION

[0022] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0023] In the description of this application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0025] like Figure 1-Figure 3As shown, this embodiment provides a liquid-cooling terminal structure, including: a terminal assembly 1, a liquid-cooling pipe 2, a cable 3, a water inlet joint 4, a return pipe 5 and a return water joint 6. The terminal assembly 1 includes a main body 101, and a plug-in cavity 103 is formed in the main body 101. The water inlet joint 4 is installed on the main body 101, and one end is connected to the plug-in cavity 103, and the other end is connected to the water inlet pipe. The main body 101 extends from the installation position of the water inlet joint 4 in a first direction to form a crimping portion 102, and the crimping portion 102 is formed in the crimping cavity 103. 4. The crimping cavity 104 is connected to the plug-in cavity 103, and the cable 3 extends through the plug-in cavity 103 to the crimping cavity 104 and is fixed in the crimping cavity 104 by crimping. A gap is formed between the cable 3 and the inner wall of the plug-in cavity 103. The liquid cooling tube 2 is sleeved on the main body 101 along the first direction and wraps the cable 3 inside. The output end of the liquid cooling tube 2 is connected to the input end of the return pipe 5, and one end of the return water joint 6 is connected to the output end of the return pipe 5, and the other end is connected to the return water pipe.

[0026] Based on the above scheme, during the charging process, the coolant first enters the plug-in cavity 103 formed in the main body 101 of the terminal assembly 1 through the water inlet joint 4. The gap formed between the plug-in cavity 103 and the cable 3 allows the coolant to initially surround the cable 3 and begin to absorb the heat generated by the current passing through the cable 3. Subsequently, the coolant continues to flow along the cable 3 and enters the crimping cavity 104 in the crimping part 102 to perform a more sufficient heat exchange with the cable 3. In this process, the cable 3 is completely wrapped in the liquid cooling tube 2, realizing direct immersion cooling of the cable 3. The coolant circulates in the liquid cooling tube 2, ensuring that all parts of the cable 3 can be evenly cooled, effectively reducing the temperature of the cable 3. The coolant that has undergone sufficient heat exchange flows out from the output end of the liquid cooling tube 2, enters the return pipe 5, and is then connected to the return pipe through the return water joint 6, and finally returns to the coolant circulation system, completing a complete cooling cycle. Through this liquid cooling circulation mechanism, the liquid-cooled terminal structure of the present application can significantly reduce the temperature of the terminal assembly 1 and the cable 3 during the charging process, reduce the charging pause phenomenon caused by overheating, and thus improve the charging efficiency. At the same time, the low-temperature working environment also slows down the aging of the internal parts of the structure, extending the service life of the product. In addition, the design simplifies the assembly process, reduces material costs, and improves the safety of the charging process.

[0027] Furthermore, in order to ensure that the liquid cooling tube 2 can be firmly fixed on the main body 101 and maintain close contact with the cable 3, the liquid cooling terminal structure of the present application also includes a clamp 7. The clamp 7 is installed on the periphery of the liquid cooling tube 2 and is tightly clamped on the main body 101. Through the tightening action of the clamp 7, the liquid cooling tube 2 is firmly fixed to the designated position of the main body 101, avoiding displacement or loosening due to vibration or external force during the charging process. This stable fixing method ensures that a good heat exchange effect is always maintained between the liquid cooling tube 2 and the cable 3, thereby improving the cooling efficiency. At the same time, the use of the clamp 7 also simplifies the installation process and reduces the difficulty of assembly. The staff only needs to put the liquid cooling tube 2 on the main body 101 along the first direction and tighten it with the clamp 7. No complicated fixing device or additional operating steps are required, which not only improves the assembly efficiency but also reduces the assembly cost.

[0028] Furthermore, in order to enhance the sealing between the liquid cooling tube 2 and the main body 101 and prevent leakage of the coolant, the liquid cooling terminal structure of the present application also includes a sealing ring 8. The sealing ring 8 is carefully installed between the outer wall of the main body 101 and the inner wall of the liquid cooling tube 2, forming a tight sealing interface. This sealing interface effectively blocks the flow path of the coolant between the liquid cooling tube 2 and the main body 101, ensuring that the coolant can only circulate inside the liquid cooling tube 2, thereby avoiding performance degradation or safety hazards caused by leakage. The sealing ring 8 is usually made of corrosion-resistant, high-temperature resistant, and wear-resistant materials to ensure that stable sealing performance can be maintained during long-term use. At the same time, its design also fully considers the convenience of installation and disassembly, so that staff can easily operate when performing maintenance or replacement.

[0029] In some embodiments, since the thickness of the main member 101 is relatively small, a connecting portion 105 is provided protruding from the main member 101, and the connecting portion 105 is threadedly connected to the water inlet connector 4. Considering that the thickness of the main member 101 may be relatively small, in order to enhance the connection strength and sealing between the water inlet connector 4 and the main member 101, the connecting portion 105 protruding from the main member 101 is designed. This not only solves the connection problems that may be caused by the insufficient thickness of the main member 101, but also further optimizes the stability and reliability of the overall structure.

[0030] Specifically, the connection portion 105 serves as a transition between the water inlet connector 4 and the main body 101. Its size and shape are carefully designed to ensure it firmly supports the water inlet connector 4 and withstands the various forces and moments during operation. The connection portion 105 and the water inlet connector 4 are connected by a threaded connection, which offers advantages such as simple structure, reliable connection, and easy disassembly and maintenance. By rotating the water inlet connector 4, it can be easily and tightly connected to the connection portion 105, forming a secure seal to prevent coolant leakage.

[0031] Furthermore, the design of the connector 105 also takes into account overall coordination and aesthetics with the main body 101. It is typically made of the same material as the main body 101 and seamlessly connected to the main body 101 through appropriate processing techniques, making the entire liquid-cooling terminal structure more compact and aesthetically pleasing. In other words, the connector 105 and the main body 101 are integrally formed.

[0032] Optionally, a cooling water tank is further included, on which a return water port and a water outlet are provided, the water outlet is connected to the water inlet pipe, and the return water port is connected to the return water pipe. A sufficient amount of coolant is stored inside the cooling water tank, which flows out through the water outlet under the action of the circulating pump, enters the water inlet pipe, and finally flows into the plug-in cavity 103 and the liquid cooling pipe 2 in the liquid-cooled terminal structure. In the liquid cooling pipe 2, the coolant fully exchanges heat with the cable 3, absorbs the heat generated by the current passing through the cable 3, and thus cools the cable 3. Subsequently, the coolant that has undergone heat exchange flows out through the output end of the liquid cooling pipe 2, enters the return pipe 5, and finally flows back to the cooling water tank through the return water port. Inside the cooling water tank, the reflux coolant will undergo a series of heat dissipation and cooling processes, such as heat dissipation through a radiator, heat exchange with a cooling medium (such as water or air), etc., to reduce the temperature of the coolant. This way, when the coolant flows out of the outlet again, it has returned to a lower temperature and can re-enter the liquid-cooled terminal structure for the next cooling cycle. The cooling water tank design not only improves the coolant's circulation efficiency but also ensures a continuous and stable cooling effect. Furthermore, the cooling water tank has a certain liquid storage capacity, which can mitigate the problem of liquid level drop caused by coolant evaporation or leakage.

[0033] To further optimize cooling performance and improve coolant circulation efficiency, a central baffle can be installed inside the cooling water tank. This physical barrier divides the interior of the cooling water tank into two separate compartments: a return water chamber and a cold water chamber. These two compartments each serve distinct functions and roles. The return water chamber, connected to the return water outlet, receives high-temperature coolant returning from the liquid-cooled terminal structure. After passing through the liquid-cooling pipe 2 and undergoing heat exchange with the cable 3, the coolant's temperature rises significantly, carrying a significant amount of heat. This high-temperature coolant then flows through the return water pipe into the return water chamber, where it undergoes initial sedimentation and separation for subsequent cooling. The cold water chamber, connected to the outlet, stores the cooled, low-temperature coolant. Separated by the central baffle, the cold water chamber and return water chamber remain relatively independent, preventing direct impact from the high-temperature coolant. When the cooling system needs to supply coolant to the liquid-cooled terminal structure, the low-temperature coolant flows from the cold water chamber, through the outlet and inlet pipe, and into the liquid-cooled terminal structure, beginning a new cooling cycle. The provision of a central baffle not only helps improve the coolant's circulation efficiency but also enhances the cooling effect. By separating the return water chamber from the cold water chamber, it prevents high-temperature coolant from interfering with and contaminating the low-temperature coolant, ensuring that the low-temperature coolant maintains a consistently low temperature. This allows the low-temperature coolant to more effectively absorb heat generated by the cable 3 when it enters the liquid-cooled terminal structure, improving the cooling effect.

[0034] In addition, the middle partition can also enhance the structural stability of the cooling water tank. It can separate the space inside the cooling water tank, reduce the impact and vibration caused by the flow of coolant, and thus protect the overall structure of the cooling water tank from damage.

[0035] Further, if Figure 4 As shown, it also includes a accommodating component 9, which includes an expansion piece 901 made of elastic material. The expansion piece 901 is arranged at the end of the liquid cooling tube 2 away from the terminal assembly 1, and a accommodating cavity 903 that is connected to the liquid cooling tube 2 is formed in the expansion piece 901. The expansion piece 901 is made of elastic material, which means that it has a certain elasticity and deformation ability. This characteristic allows a accommodating cavity 903 that is connected to the liquid cooling tube 2 to be formed inside the expansion piece 901, and the accommodating cavity 903 can be enlarged and reduced. The design of the accommodating cavity 903 allows the coolant to flow freely between the liquid cooling tube 2 and the expansion piece 901, thereby ensuring the continuity and circulation of the coolant. At the same time, the accommodating cavity 903 also plays a certain buffering role, which can absorb and alleviate the impact and vibration caused by the flow of coolant, protecting the liquid cooling tube 2 and the entire liquid cooling system from damage.

[0036] Furthermore, the provision of expansion piece 901 improves the adaptability of the liquid cooling system. In actual use, due to changes in ambient temperature, operating pressure, and other factors, the liquid cooling tube 2 may experience varying degrees of thermal expansion or contraction. The presence of expansion piece 901 effectively absorbs the resulting length changes, preventing leakage or damage caused by excessive expansion or contraction of the liquid cooling tube 2.

[0037] At the same time, the accommodating component 9 also includes a shell 902, and the expansion piece 901 is arranged inside the shell 902, and a gap is left between the outer wall of the expansion piece 901 and the inner wall of the shell 902, and the expansion piece 901 is provided with a connection port connected to the liquid cooling pipe 2. The expansion piece 901 is safely arranged inside the shell 902, but the two are not tightly fitted together, but there is an appropriate gap. The existence of this gap is of great significance: it allows the expansion piece 901 to have a certain amount of room to move when it expands due to heat or contracts due to cold, thereby avoiding damage caused by excessive squeezing or stretching. At the same time, the gap also acts as a buffer, which can absorb and disperse external shocks and vibrations and protect the integrity of internal components.

[0038] To ensure smooth flow of coolant, the expansion piece 901 is specially provided with a connection port that communicates with the liquid cooling tube 2. This connection port is the key channel for coolant to enter and exit the expansion piece 901, ensuring that the coolant can flow freely between the liquid cooling tube 2 and the expansion piece 901, achieving effective heat transfer and dissipation.

[0039] It is worth mentioning that it also includes a connecting piece 10, which is connected in series in the liquid cooling pipe 2. A first channel 1001 and a second channel 1002 are formed in the connecting piece 10. The two ends of the first channel 1001 are respectively connected to the liquid cooling pipe 2, and the second channel 1002 connects the first channel 1001 and the connecting port. In the in-depth improvement of the design of the liquid cooling system, the connecting piece 10 is a key connection and flow guide component, and its importance cannot be ignored. The connecting piece 10 is cleverly connected in series in the liquid cooling pipe 2, which not only ensures the smooth circulation of the coolant, but also realizes the precise distribution and efficient circulation of the coolant through its complex internal channel design.

[0040] Specifically, two main channels are formed inside the connecting piece 10: a first channel 1001 and a second channel 1002. The two ends of the first channel 1001 are tightly connected to the liquid cooling pipe 2 respectively. As the main path for the coolant to flow in the liquid cooling pipe 2, it is responsible for transporting the coolant from one end to the other end, while the second channel 1002 cleverly connects the first channel 1001 and the connection port. It plays a role of diversion and convergence, allowing part of the coolant to flow into or out of the expansion piece 901 through a specific path. This design allows the coolant to more flexibly adjust its direction and speed during the flow process, thereby achieving precise cooling of different areas or components. At the same time, the presence of the connecting piece 10 also enhances the overall stability and reliability of the liquid cooling system. Moreover, as an independent component, it can be replaced or repaired without affecting the normal operation of other parts, greatly reducing the maintenance cost and downtime of the system.

[0041] In addition, the material selection and manufacturing process of the connecting piece 10 are also crucial. To ensure that it can withstand harsh environments such as high pressure, high temperature and corrosion, the connecting piece 10 is usually made of high-strength, corrosion-resistant alloy materials, and precise processing is used to ensure the smoothness and accuracy of each channel.

[0042] On the other hand, a charging gun is also provided, comprising the liquid-cooled terminal structure as described in any one of the above items.

[0043] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other positions or relationships are used solely for ease of description and simplified operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0044] Throughout this specification, references to terms such as "an embodiment" or "example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0045] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0046] The technical principles of the present application have been described above in conjunction with specific embodiments. These descriptions are intended solely to explain the principles of the present application and are not to be construed in any way as limiting the scope of protection of the present application. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present application without inventive effort, and such implementations will fall within the scope of protection of the present application.

Claims

1. A liquid-cooled terminal structure, characterized in that: include: A terminal assembly (1), a liquid cooling pipe (2), a cable (3), a water inlet joint (4), a return pipe (5) and a return water joint (6), wherein the terminal assembly (1) comprises a main body (101), a plug-in cavity (103) is formed in the main body (101), and the water inlet joint (4) is installed on the main body (101), with one end communicating with the plug-in cavity (103) and the other end connected to the water inlet pipe; The main body (101) extends from the installation position of the water inlet connector (4) toward the first direction to form a crimping portion (102), a crimping cavity (104) is formed in the crimping portion (102), and the crimping cavity (104) is connected and communicated with the plug cavity (103); The cable (3) passes through the plug-in cavity (103) and extends to the crimping cavity (104), and is fixed in the crimping cavity (104) by crimping. A gap is formed between the cable (3) and the inner wall of the plug-in cavity (103). The liquid cooling tube (2) is sleeved on the main body (101) along a first direction and wraps the cable (3) therein. The output end of the liquid cooling tube (2) is connected to the input end of the return pipe (5). One end of the return water joint (6) is connected to the output end of the return water pipe (5), and the other end is connected to the return water pipe.

2. The liquid cooling terminal structure according to claim 1, characterized in that: It also includes a clamp (7), which clamps the liquid cooling pipe (2) onto the main body (101).

3. The liquid cooling terminal structure according to claim 1, characterized in that: It also includes a sealing ring (8), which is arranged between the outer wall of the main body (101) and the inner wall of the liquid cooling tube (2).

4. The liquid cooling terminal structure according to claim 1, characterized in that: A connecting portion (105) is protruding from the main body (101), and the connecting portion (105) is connected to the water inlet connector (4) via a threaded connection.

5. The liquid-cooling terminal structure according to any one of claims 1 to 4, characterized in that: It also includes a cooling water tank, which is provided with a return water port and a water outlet. The water outlet is connected to the water inlet pipe, and the return water port is connected to the return water pipe.

6. The liquid cooling terminal structure according to claim 5, characterized in that: A middle partition is provided in the cooling water tank, and the middle partition divides the interior of the cooling water tank into a return water chamber and a cold water chamber. The return water chamber is connected to the return water port, and the cold water chamber is connected to the water outlet.

7. The liquid-cooling terminal structure according to any one of claims 1 to 4, characterized in that: The invention also includes a receiving assembly (9), wherein the receiving assembly (9) includes an expansion piece (901) made of elastic material, the expansion piece (901) is arranged at one end of the liquid cooling tube (2) away from the terminal assembly (1), and a receiving cavity (903) is formed in the expansion piece (901) and is in communication with the liquid cooling tube (2).

8. The liquid cooling terminal structure according to claim 7, characterized in that: The accommodating assembly (9) further includes a shell (902), the expansion member (901) is arranged inside the shell (902), and a gap is left between the outer wall of the expansion member (901) and the inner wall of the shell (902), and the expansion member (901) is provided with a connection port that communicates with the liquid cooling pipe (2).

9. The liquid cooling terminal structure according to claim 8, characterized in that: The invention also includes a connecting piece (10), which is connected in series in the liquid cooling pipe (2), and a first channel (1001) and a second channel (1002) are formed in the connecting piece (10), wherein both ends of the first channel (1001) are respectively connected to the liquid cooling pipe (2), and the second channel (1002) is connected to the first channel (1001) and the connecting port.

10. A charging gun, characterized in that: The liquid-cooled terminal structure comprises the liquid-cooled terminal structure according to any one of claims 1 to 9.

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