Liquid cooling terminal and charging gun

Abstract

The utility model discloses a liquid cooling terminal and a charging gun. The liquid cooling terminal comprises a contact pin shell which is provided with a containing cavity, and the inner wall of the containing cavity is provided with a liquid inlet communicated with a liquid inlet pipe and a liquid outlet communicated with a liquid outlet pipe. A contact pin inner core is arranged in the containing cavity, and the side wall of a partition plate of the contact pin inner core is tightly attached to the inner wall of the containing cavity. And a gap exists between the front end of the partition plate and the bottom end of the accommodating cavity, so that the accommodating cavity of the pin shell is divided into two communicated liquid cooling channels. And a cooling liquid loop which flows from the liquid inlet pipe to the liquid inlet, flows through the two liquid cooling channels in the accommodating cavity and flows out from the liquid outlet to the liquid outlet pipe is formed. In the charging process, the cooling liquid flows in the loop to take away heat generated by the contact pin shell and the contact pin inner core. And meanwhile, a wire harness in the cable sequentially comprises a liquid inlet pipe, a power conductor and an outer protective layer or a liquid outlet pipe from inside to outside, and the power conductor and the outer protective layer take away heat generated by the cable when the cooling liquid flows in the liquid inlet pipe and the liquid outlet pipe. Due to the existence of the cooling liquid loop, the charging gun can be effectively cooled in the using process, the high-power charging requirement is met, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of charging guns, and in particular to a liquid cooling terminal and a charging gun containing the liquid cooling terminal. Background Art

[0002] With the rapid development of the new energy vehicle industry, the demand for high-power charging equipment is increasing. When using a charging gun for high-power charging, the charging terminals and cables of the charging gun will generate a lot of heat due to the existence of resistance. When the temperature is too high, it will affect the normal use of the charging gun, resulting in reduced charging efficiency and potential safety hazards. Utility Model Content

[0003] The utility model aims to provide a liquid cooling terminal, aiming to solve the problem that the charging terminal and the heating area of ​​the cable of the charging gun cannot be effectively cooled.

[0004] To achieve the above object, the utility model provides a liquid-cooled terminal, comprising:

[0005] The pin housing comprises a pin end, wherein a cavity is provided inside the pin end, and a liquid inlet and a liquid outlet are provided on the inner wall of the cavity;

[0006] The pin core is arranged in the cavity, and the pin core includes a partition plate, the width of which is adapted to the diameter of the cavity, so that the side wall of the partition plate is closely fitted to the inner wall of the cavity, and there is a gap between the front end of the partition plate and the bottom end of the cavity;

[0007] The partition plate divides the cavity into two interconnected liquid cooling channels, and the two liquid cooling channels are respectively connected to the liquid inlet and the liquid outlet, so as to realize the flow of cooling liquid from the liquid inlet to the liquid cooling channel and the liquid outlet.

[0008] In one embodiment, the liquid cooling terminal further comprises a cable, wherein the cable comprises a power conductor, a liquid inlet pipe and a liquid outlet pipe;

[0009] The pin housing further comprises a wiring terminal arranged at the rear side of the pin end, the wiring terminal is connected with a power conductor, and the power conductor is conductively connected to the pin housing through the wiring terminal;

[0010] The liquid inlet pipe is arranged at the liquid inlet and communicated with the containing cavity;

[0011] The liquid outlet pipe is arranged at the liquid outlet and communicated with the containing cavity.

[0012] In one embodiment, the cable includes two wiring harnesses, one of which includes a liquid inlet pipe, a power conductor, and an outer sheath from the inside to the outside, and the other of which includes a liquid outlet pipe, a power conductor, and an outer sheath from the inside to the outside.

[0013] In one embodiment, the liquid inlet and the liquid outlet are arranged on both sides of the partition plate, and the liquid inlet and the liquid outlet are respectively connected to the two liquid cooling channels.

[0014] In one embodiment, the inner core of the plug pin further includes an inserting portion disposed at the rear end of the partition plate, the inserting portion being inserted into the cavity, the diameter of the inserting portion being adapted to the diameter of the cavity so that the inserting portion fits tightly against the inner wall of the cavity.

[0015] In one embodiment, a raised liquid inlet block and a liquid outlet block are provided on the pin end, and the liquid inlet is an "L"-shaped liquid inlet channel arranged in the liquid inlet block, one end of the liquid inlet is connected to the cavity, and the other end is connected to the liquid inlet pipe; the liquid outlet is an "L"-shaped liquid outlet channel arranged in the liquid outlet block, one end of the liquid outlet is connected to the cavity, and the other end is connected to the liquid outlet pipe.

[0016] In one embodiment, an additional hole communicating with the liquid inlet is formed on the liquid inlet block, and a blocking member for opening or closing the additional hole is connected to the additional hole.

[0017] In one embodiment, the liquid cooling terminal further includes two adapters for connecting the liquid inlet pipe and the liquid outlet pipe to the pin housing respectively.

[0018] In one embodiment, the adapter includes an adapter tube and a baffle portion arranged on the outer circumferential surface of the adapter tube, and the adapter tube forms a first sub-adapter tube and a second sub-adapter tube on both sides of the baffle portion, respectively, wherein the first sub-adapter tubes of the two adapters are respectively connected to the liquid inlet and the liquid outlet, and the second sub-adapter tubes of the two adapters are respectively connected to the liquid inlet pipe and the liquid outlet pipe.

[0019] The utility model also provides a charging gun, comprising a housing, and a plurality of liquid-cooling terminals as described above.

[0020] The charging gun of the technical solution of the utility model is provided with a pin core in the cavity of the pin shell, and the side wall of the partition plate of the pin core is tightly fitted with the inner wall of the cavity, and there is a gap between the front end of the partition plate and the bottom end of the cavity, so that the cavity of the pin shell is divided into two connected liquid cooling channels. The cavity is also provided with a liquid inlet connected to the liquid inlet pipe and a liquid outlet connected to the liquid outlet pipe, forming a cooling liquid circuit that flows from the liquid inlet pipe to the liquid inlet, flows through the two liquid cooling channels in the cavity, and flows out from the liquid outlet to the liquid outlet pipe. During the charging process, the coolant flowing in the circuit will take away the heat generated by the pin shell and the pin core. At the same time, the wiring harness in the cable adopts a structure of liquid inlet pipe, power conductor, outer sheath or liquid outlet pipe, power conductor, outer sheath from the inside to the outside. When the coolant flows in the liquid inlet pipe and the liquid outlet pipe, it will take away the heat generated by the heating area of ​​the cable. The existence of the above-mentioned coolant circuit enables the charging gun to effectively cool down during use, meet the high-power charging requirements, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 This is a structural assembly diagram of an embodiment of a liquid-cooled terminal of the utility model;

[0023] Figure 2 This is a schematic diagram of the cable structure of an embodiment of the liquid cooling terminal of the utility model;

[0024] Figure 3 This is a schematic diagram of the wiring harness structure of an embodiment of the liquid cooling terminal of the utility model;

[0025] Figure 4 This is a structural explosion diagram of an embodiment of the liquid cooling terminal of the utility model;

[0026] Figure 5 1 is a schematic diagram of the three-dimensional structure of the pin housing of an embodiment of the liquid-cooled terminal of the utility model;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the inner core of the pin of an embodiment of the liquid-cooled terminal of the utility model;

[0028] Figure 7 This is a schematic diagram of the three-dimensional structure of the adapter of an embodiment of the liquid-cooling terminal of the utility model;

[0029] Figure 8This is a structural cross-sectional view of an embodiment of the liquid-cooled terminal of the utility model;

[0030] Fig. 9 This is a schematic diagram of the three-dimensional structure of the pin housing of an embodiment of the liquid-cooled terminal of the utility model (ultrasonic welding);

[0031] Fig.10 This is a structural assembly diagram of an embodiment of the liquid-cooled terminal of the utility model (ultrasonic welding);

[0032] Fig.11 This is a structural cross-sectional view of an embodiment of the liquid-cooled terminal of the utility model (ultrasonic welding);

[0033] Fig.12 This is a structural explosion diagram of an embodiment of the charging gun of the utility model;

[0034] Fig.13 This is a front view of an embodiment of a charging gun of the utility model;

[0035] Fig.14 yes Fig.13 Sectional view along line AA.

[0036] Description of Figure Numbers:

[0037]

[0038]

[0039] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0044] With the rapid development of the new energy vehicle industry, the demand for high-power charging equipment is increasing. When using a charging gun for high-power charging, the charging terminal and cable of the charging gun will generate a lot of heat due to the existence of resistance. It is difficult to effectively cool the charging terminal and cable by relying solely on natural heat dissipation. When the temperature is too high, it will affect the normal use of the charging gun, resulting in reduced charging efficiency and safety hazards.

[0045] In order to solve the above technical problems, the technical solution of the utility model is to arrange the pin core in the cavity of the pin housing, and the side wall of the partition plate of the pin core is tightly fitted with the inner wall of the cavity, and there is a gap between the front end of the partition plate and the bottom end of the cavity, so that the cavity of the pin housing is divided into two connected liquid cooling channels. The cavity is also provided with a liquid inlet connected to the liquid inlet pipe and a liquid outlet connected to the liquid outlet pipe, forming a cooling liquid circuit that flows from the liquid inlet pipe to the liquid inlet, flows through the two liquid cooling channels in the cavity, and flows out from the liquid outlet to the liquid outlet pipe. During the charging process, the coolant flowing in the circuit will take away the heat generated by the pin housing and the pin core. At the same time, the wiring harness in the cable adopts the liquid inlet pipe, power conductor, outer sheath or liquid outlet pipe, power conductor, outer sheath from the inside to the outside, and the coolant will take away the heat generated by the heating area of ​​the cable when flowing in the liquid inlet pipe and the liquid outlet pipe. The existence of the above-mentioned coolant circuit enables the charging gun to effectively cool down during use, meet the high-power charging requirements, and improve work efficiency.

[0046] The above technical solution is described in detail below with reference to the accompanying drawings.

[0047] The utility model provides a liquid cooling terminal 1. Please refer to Figures 1 to 14 The liquid-cooled terminal 1 comprises: a pin housing 10, comprising a pin end 101, a cavity 101a is provided inside the pin end 101, a liquid inlet 103a and a liquid outlet 104a are provided on the side wall of the cavity 101a; a pin core 40 is provided in the cavity 101a, the pin core 40 comprises a partition plate 401, the width of the partition plate 401 is adapted to the diameter of the cavity 101a, so that the side wall of the partition plate 401 is closely fitted with the inner wall of the cavity 101a; there is a gap between the front end of the partition plate 401 and the bottom end 101b of the cavity; the partition plate 401 divides the cavity 101a into two connected liquid-cooling channels, the two liquid-cooling channels are connected with the liquid inlet 103a and the liquid outlet 104a, so that the cooling liquid flows from the liquid inlet 103a to the liquid-cooling channel and the liquid outlet 104a.

[0048] In this embodiment, the pin housing 10 can be made of a metal conductive material, for example, a preferred copper alloy or pure copper can be used, and it can also be subjected to surface treatments such as nickel plating and silver plating to improve the conductive performance of the pin housing 10. The pin housing 10 has a pin end 101, which is a cylindrical structure. The pin end 101 is used to be plugged with an adapted socket to achieve a conductive connection. In actual use, the pin end 101 is in conductive contact with the socket, and current passes through the pin end 101. Due to the existence of resistance, the pin end 101 will be heated. A cavity 101a is provided in the pin end 101, and the cavity 101a is used to accommodate the pin core 40. The pin core 40 can be made of a metal pin conductive material, for example, a preferred copper alloy or pure copper can be used, and it can also be subjected to surface treatments such as nickel plating and silver plating to improve the conductive performance of the pin core 40. In actual use, current passes through the pin core 40. Due to the existence of resistance, the pin core 40 will be heated. The pin core 40 includes a partition plate 401, which is inserted into the cavity 101a to partially divide the cavity 101a into two semi-cylindrical liquid cooling channels. The partition plate 401 is a rectangular plate-like structure, and the width of the partition plate 401 is adapted to the diameter of the cavity 101a, so that the side wall of the partition plate 401 fits tightly with the side wall of the cavity 101. There is a gap between the front end of the partition plate 401 and the bottom end 101b of the cavity, so that the cavity 101a is divided into two semi-cylindrical liquid cooling channels and a connecting channel connecting the two semi-cylindrical liquid cooling channels. A liquid inlet 103a and a liquid outlet 104a are provided on the side wall of the cavity 101a, and the liquid inlet 103a and the liquid outlet 104a are both connected to the cavity 101a. In actual use, the coolant flows into the cavity 101a from the liquid inlet 103a, flows through the connecting channel along the liquid cooling channel connected to the liquid inlet 103a, continues to flow along the liquid cooling channel connected to the liquid outlet 104a, and finally flows out of the cavity 101a through the liquid outlet 104a. During the flow of the coolant, the pin end 101 contacts the coolant through the inner wall of the cavity 101a, and the partition plate 401 of the pin core 40 is completely immersed in the coolant. The flow of the coolant will take away the heat of the pin end 101 and the pin core 40. This immersion cooling method is more conducive to the heat exchange between the coolant and the pin housing 10 and the pin core 40, and improves the cooling efficiency. At the same time, by improving the internal structure of the pin housing 10, the coolant circulates inside the pin housing 10 to conduct heat dissipation, and there is no need to set up a liquid cooling component to dissipate heat for the pin housing 10, which simplifies the structure while improving the cooling efficiency and cooling effect. In this embodiment, the coolant may be an insulating liquid with good heat conduction performance, such as any one of transformer oil, capacitor oil, cable oil, silicone oil or mineral oil.

[0049] For further information, please refer to Figures 1 to 5 , Figures 8 to 11The liquid cooling terminal 1 further includes a cable 70, which includes a power conductor 701, a liquid inlet pipe 20 and a liquid outlet pipe 30. The pin housing 10 further includes a wiring terminal 102 disposed at the rear side of the pin end 101, the wiring terminal 102 is connected to the power conductor 701, and the power conductor 701 is conductively connected to the pin housing 10 through the wiring terminal 102. The liquid inlet pipe 20 is disposed at the liquid inlet port 103a and communicates with the cavity 101a; the liquid outlet pipe 30 is disposed at the liquid outlet port 104a and communicates with the cavity 101a.

[0050] Specifically, the power conductor 701 is made of a conductive material, and preferably, the power conductor 701 is made of copper alloy or pure copper. The cable 70 includes a power conductor 701, a liquid inlet pipe 20 and a liquid outlet pipe 30. The power conductor 701, the liquid inlet pipe 20 and the liquid outlet pipe 30 can be arranged in a variety of ways in the cable 70. It can be understood that the power conductor 701 can be arranged separately from the liquid inlet pipe 20 and the liquid outlet pipe 30, or a nested arrangement method in which the power conductor 701 is wrapped around the outside of the liquid inlet pipe 20 and the power conductor 701 is wrapped around the outside of the liquid outlet pipe 30, or other arrangements can be adopted. The terminal 102 is arranged on the rear side of the pin end 101, and the terminal 102 and the power conductor 701 can be connected by crimping or ultrasonic welding. When the crimping method is adopted, the terminal 102 is set as a columnar body, and a crimping hole 102a is opened along the axial direction. One end of the power conductor 701 is inserted into the crimping hole 102a and crimped and fixed, and is conductively connected to the pin housing 10. When ultrasonic welding is used, the terminal 102 is formed with a connection plane, which is a first welding surface, and one end of the power conductor 701 is formed with a second welding surface 702. The first welding surface and the second welding surface 702 are welded by ultrasonic welding, so that the power conductor 701 is conductively connected to the pin housing 10. The setting of different connection methods increases the use scenarios of the product and improves the user experience. During the charging process, the current flows through the power conductor 701, causing the power conductor 701 to generate heat. The liquid inlet pipe 20 is arranged at the liquid inlet 103a and is connected to the cavity 101a; the liquid outlet pipe 30 is arranged at the liquid outlet 104a and is connected to the cavity 101a. In actual use, the coolant flows from the liquid inlet pipe 20 through the liquid inlet port 103a into the cavity 101a, flows through the connecting channel along the liquid cooling channel connected to the liquid inlet port 103a, continues to flow along the liquid cooling channel connected to the liquid outlet port 104a, and finally flows out through the liquid outlet port 104a and the liquid outlet pipe 20, taking away the heat generated by the pin housing 10 and the pin inner core 40. At the same time, the coolant flows in the liquid inlet pipe 20 and the liquid outlet pipe 30, and the liquid inlet pipe 20 and the liquid outlet pipe 30 are in contact with the power conductor 701, and the power conductor 701 is heat-dissipated by conduction, so that the power conductor 701 can continue to cool down during use, avoiding overheating, and ensuring the stable operation of the charging process.

[0051] For further information, please refer to Figure 2and Figure 3 The cable 70 includes two wiring harnesses 70a, one wiring harness 70a includes a liquid inlet pipe 20, a power conductor 701, and an outer sheath 703 from the inside to the outside, and the other wiring harness 70a includes a liquid outlet pipe 30, a power conductor 701, and an outer sheath 703 from the inside to the outside.

[0052] Specifically, the cable 70 includes two harnesses 70a, and the harnesses 70a adopt a nested structure, wherein one harness 70a is provided with a liquid inlet pipe 20, a power conductor 701, and an outer sheath 703 from the inside to the outside, and the other harness 70a is provided with a liquid outlet pipe 30, a power conductor 701, and an outer sheath 703 from the inside to the outside. Cooling liquid flows through the liquid inlet pipe 20 and the liquid outlet pipe 30, and the power conductor 701 is wrapped around the outer periphery of the liquid inlet pipe 20, and the power conductor 701 is wrapped around the outer periphery of the liquid outlet pipe 30. This nested arrangement allows the liquid inlet pipe 20, the liquid outlet pipe 30 and the power conductor 701 to have a larger contact area, thereby improving the cooling efficiency and having a better cooling effect. During the charging process, the current flows through the power conductor 701, causing the power conductor 701 to generate heat. The coolant flows in the liquid inlet pipe 20 and the liquid outlet pipe 30, and conducts heat to the power conductor 701 wrapped around the liquid inlet pipe 20 and the liquid outlet pipe 30, so that the power conductor 701 can continue to cool down during use, avoiding overheating and ensuring the stable operation of the charging process. An outer sheath 703 is provided on the periphery of the wiring harness 70a to protect the wrapping structure of the power conductor 701 and the liquid inlet pipe 20 and the liquid outlet pipe 30, thereby increasing the mechanical strength of the structure and improving durability. The outer sheath 703 is made of insulating material, generally PVC, TPE, TPU, rubber and other materials can be used to avoid electrical hazards.

[0053] For further information, please refer to Figure 8 The liquid inlet 103a and the liquid outlet 104a are arranged on both sides of the partition plate 401, and the liquid inlet 103a and the liquid outlet 104a are respectively connected to the two liquid cooling channels.

[0054] Specifically, the partition plate 401 divides the inner cavity 101a into two liquid cooling channels, and a liquid inlet 103a and a liquid outlet 104a are provided on the side wall of the inner cavity 101a, which are arranged on both sides of the partition plate 401. The liquid inlet 103a is connected to the liquid cooling channel above the partition plate 401, and the liquid outlet 104a is connected to the liquid cooling channel below the partition plate 401. Preferably, the liquid inlet 103a and the liquid outlet 104a are symmetrically arranged relative to the partition plate 401, and the two liquid cooling channels are symmetrical relative to the partition plate 401. The coolant enters the cavity from the liquid inlet 103a, flows through the upper and lower liquid cooling channels, and then flows out from the liquid outlet 104a, taking out the heat generated by the partition plate 401, thereby achieving the cooling of the pin core 40. It can be understood that the liquid inlet 103a and the liquid outlet 104a are symmetrically arranged on both sides of the partition plate 401 away from the bottom of the inner cavity 101a, so that the partition plate 401 is in contact with the coolant to the maximum extent, thereby improving the cooling effect.

[0055] For further information, please refer to Figure 6 and Figure 8 The pin core 40 also includes an inserting portion 402 disposed at the rear end of the partition plate 401. The inserting portion 402 is inserted into the cavity 101a. The diameter of the inserting portion 402 is adapted to the diameter of the cavity 101a, so that the inserting portion 402 fits tightly against the inner wall of the cavity 101a.

[0056] Specifically, the plug-in portion 402 is a cylindrical body, and the partition plate 401 is arranged at the middle position of one end face of the plug-in portion 402, and the diameter of the plug-in portion 402 is slightly larger than the width of the partition plate 401. The cavity 101a has a first plug-in cavity and a second plug-in cavity, and the diameter of the second plug-in cavity is slightly larger than the diameter of the first plug-in cavity. It can be understood that the side wall of the first plug-in cavity and the side wall of the second plug-in cavity form a step surface. When the pin core 40 is inserted into the pin housing 10, the partition plate 401 is inserted into the first plug-in cavity, and the side wall of the partition plate 401 is tightly fitted with the inner wall of the first plug-in cavity. The plug-in portion 402 is provided with an end face of the partition plate 401 abutting against the step surface, so as to limit the axial movement of the plug-in portion 402, prevent the pin core 400 from being inserted too deeply, ensure that there is a gap between the front end of the partition plate 401 and the bottom of the first plug-in cavity, and ensure the normal circulation of the coolant. The plug-in portion 402 is inserted into the second plug-in cavity, and the diameter of the plug-in portion 402 is adapted to the diameter of the second plug-in cavity, so that the side wall of the plug-in portion 402 fits tightly with the inner wall of the second plug-in cavity. It can be understood that the coolant in the cavity 101a only flows in the first plug-in cavity and cannot flow out of the second plug-in cavity. Therefore, the coolant will not directly contact the power conductor 701. In actual use, the coolant flows from the liquid inlet pipe 20 through the liquid inlet 103a into the first plug-in cavity, flows through the connecting channel along the liquid cooling channel connected to the liquid inlet 103a, continues to flow along the liquid cooling channel connected to the liquid outlet 104a, and finally flows out through the liquid outlet 104a and the liquid outlet pipe 20. During the flow of the coolant, the pin end 101 contacts the coolant through the inner wall of the cavity 101a, the partition plate 401 of the pin core 40 is completely immersed in the coolant, and the plug-in portion 402 of the pin core 40 contacts the coolant with the end surface facing the partition plate 401. The pin end 101 and the pin core 40 are cooled by the flow of the coolant.

[0057] For further information, please refer to Figure 1 , Figure 4 , Figure 5 and Figure 8 The pin end 101 is provided with a raised liquid inlet block 103 and a liquid outlet block 104. The liquid inlet 103a is an "L"-shaped liquid inlet channel arranged in the liquid inlet block 103. One end of the liquid inlet 103a is connected to the cavity 101a, and the other end is connected to the liquid inlet pipe 20; the liquid outlet 104a is an "L"-shaped liquid outlet channel arranged in the liquid outlet block 104. One end of the liquid outlet 104a is connected to the cavity 101a, and the other end is connected to the liquid outlet pipe 30.

[0058] Specifically, the liquid inlet block 103 and the liquid outlet block 104 are symmetrically arranged on both sides of the pin end 101. A liquid inlet 103a connected to the cavity 101a is provided in the liquid inlet block 103, and the liquid inlet 103a is an "L"-shaped liquid inlet channel. A section of the liquid inlet channel close to the cavity 101a is arranged perpendicular to the axial direction of the pin housing 10, and a section away from the cavity 101a is arranged parallel to the axial direction of the pin housing 10, and the two sections of the liquid inlet channel are connected at the corner. One end of the liquid inlet 103a is connected to the cavity 101a, and the other end is connected to the liquid inlet pipe 20. A liquid outlet 104a connected to the cavity 101a is provided in the liquid outlet block 104, and the liquid outlet 104a is an "L"-shaped liquid outlet channel. The section of the liquid outlet channel close to the cavity 101a is arranged perpendicular to the axial direction of the pin housing 10, and the section away from the cavity 101a is arranged parallel to the axial direction of the pin housing 10. The two sections of the liquid outlet channel are connected at the corner. One end of the liquid outlet 104a is connected to the cavity 101a, and the other end is connected to the liquid outlet pipe 30. The coolant flows into the liquid inlet block 103 from the liquid inlet pipe, flows into the cavity 101a after passing through the liquid inlet 103a, flows into the liquid outlet block 104 after flowing along the liquid cooling channel, and flows into the liquid outlet pipe 30 through the liquid outlet 104a.

[0059] The utility model proposes an embodiment, please refer to Figure 4 , Figure 5 and Figure 8 The liquid inlet block 103 is provided with an additional hole 105 communicating with the liquid inlet port 103 a , and the additional hole 105 is connected to a blocking member 50 for opening or closing the additional hole 105 .

[0060] Specifically, the additional hole 105 is provided at the corner of the "L"-shaped liquid inlet channel, and the additional hole 105 is connected to the liquid inlet 103a. A plugging member 50 is connected to the additional hole 105. When it is necessary to connect other systems, the plugging member 50 can be removed, and other components can be connected to the additional hole 105. When it is not necessary to connect other systems, the plugging member 50 can be installed at the additional hole 105 to prevent the outflow of coolant. Optionally, the plugging member 50 is a screw, and the additional hole 105 is a threaded hole adapted to the screw, and the plugging member 50 is spirally connected to the additional hole 105. Furthermore, a sealing ring is provided between the plugging member 50 and the additional hole 105 to further ensure the tightness of the connection between the plugging member 50 and the additional hole 105 to prevent leakage of coolant.

[0061] The utility model proposes an embodiment, please refer to Figure 4 , Figure 7 and Figure 8 The liquid-cooling terminal 1 further includes two adapters 60 for connecting the liquid inlet pipe 20 and the liquid outlet pipe 30 to the pin housing 10 respectively.

[0062] Specifically, the liquid inlet 103a and the liquid outlet 104a are parallel to the axial direction of the pin housing 10, and a threaded hole is opened in the axial direction near the adapter 60. The two adapters 60 are respectively threadedly connected to the liquid inlet block 103 and the liquid outlet block 104 at the threaded holes. Furthermore, a sealing ring is provided between the adapter 60 and the liquid inlet block 103, and a sealing ring is provided between the adapter 60 and the liquid outlet block 104 to ensure the tightness of the connection between the two adapters 60 and the pin housing 10 to prevent leakage of the coolant. The end of the adapter 60 connected to the liquid inlet block 103 away from the liquid inlet block 103 is connected to the liquid inlet pipe 20, and the end of the adapter 60 connected to the liquid outlet block 104 away from the liquid outlet block 104 is connected to the liquid outlet pipe 30.

[0063] For further information, please refer to Figure 7 and Figure 8 The adapter 60 includes an adapter tube and a baffle portion 602 arranged on the outer circumferential surface of the adapter tube, and the adapter tube forms a first sub-adapter tube 601 and a second sub-adapter tube 603 on both sides of the baffle portion 602, wherein the first sub-adapter tubes 601 of the two adapters 60 are respectively connected to the liquid inlet 103a and the liquid outlet 104a, and the second sub-adapter tubes 603 of the two adapters 60 are respectively connected to the liquid inlet pipe 20 and the liquid outlet pipe 30.

[0064] Specifically, in the adapter 60 connected to the liquid inlet block 103, the outer wall of the first sub-adapter tube 601 has a threaded section, which is threadedly connected to the liquid inlet block 103. An annular groove is provided on the end surface of the baffle 602 facing the liquid inlet block 103, and a sealing ring is provided in the annular groove to achieve a sealed connection between the first sub-adapter tube 601 and the liquid inlet block 103. One end of the liquid inlet tube 20 close to the liquid inlet block 103 is sleeved on the outer periphery of the second sub-adapter tube 603. It can be understood that the inner diameter of the liquid inlet tube 20 should be greater than or equal to the outer diameter of the second sub-adapter tube 603. By sleeve-fitting the liquid inlet tube 20 with the second sub-adapter tube 603, the connection between the liquid inlet tube 20 and the adapter 60 and the delivery of the coolant can be simply achieved. In order to improve the tightness of the connection between the liquid inlet tube 20 and the second sub-adapter tube 603, a fastener is provided outside the connection between the liquid inlet tube 20 and the second sub-adapter tube 603. It is understandable that the fastener can be tied with wire or cable ties, or can be locked and fixed by nuts, so that the liquid inlet pipe 20 and the adapter 60 are firmly connected. Preferably, the fastener can be a steel hoop. The steel hoop can be sleeved on the outer circumference of the liquid inlet pipe 20, so that the connecting end of the liquid inlet pipe 20 can be tightly fixed on the outer circumference of the second sub-adapter pipe 603, so as to prevent the liquid inlet pipe 20 and the adapter 60 from being separated after long-term use, and ensure that the cooling medium will not leak. In addition, the steel hoop has a simple structure and is easy to install, which can further simplify the installation process. It is understandable that in the adapter 60 connected to the liquid outlet block 104, its first sub-adapter pipe 601 is threadedly connected to the liquid outlet block 104, and its baffle 602 is provided with an annular groove on the end face facing the liquid outlet block 104, and a sealing ring is provided in the annular groove to achieve a sealed connection between the first sub-adapter pipe 601 and the liquid outlet block 104. One end of the liquid outlet pipe 30 close to the liquid outlet block 104 is sleeved on the outer periphery of the second sub-adapter pipe 603, and a fastener is provided outside the connection between the liquid outlet pipe 30 and the second sub-adapter pipe 603 to ensure the tight connection between the liquid outlet pipe 30 and the adapter 60 to prevent leakage of coolant.

[0065] In actual use, the coolant flows from the liquid inlet pipe 20 through the adapter 60, flows into the cavity 101a through the liquid inlet 103a, flows into the liquid outlet 104a along the liquid cooling channel of the cavity 101a, flows through the adapter 60 through the liquid outlet 104a, and flows out from the liquid outlet pipe 30, forming a set of cooling circuits to cool the pin housing 10, the pin core 40 and the wiring harness 70a. During the flow of the coolant, the pin end 101 contacts the coolant through the inner wall of the cavity 101a, and the partition plate 401 of the pin core 40 is completely immersed in the coolant. The flow of the coolant will take away the heat of the pin end 101 and the pin core 40. The coolant flows in the liquid inlet pipe 20 and the liquid outlet pipe 30, and conducts heat dissipation to the power conductor 701 in the wiring harness 70a, so that the power conductor 701 can continue to cool down during use, avoiding overheating, and ensuring the stable operation of the charging process. It can be understood that the cooling direction of the cooling medium in this embodiment can be reversely designed according to the actual needs of the product.

[0066] The embodiment of the utility model further provides a charging gun, which includes a housing and a plurality of groups of liquid-cooling terminals 1 as described above.

[0067] For details, please refer to Figure 2 , Fig.12 , Fig.13 and Fig.14The charging gun has a shell, the shell includes a gun head and a gun body, and the gun head is arranged at the front end of the gun body. A gun head sealing ring 804 is arranged between the gun head and the gun body to improve the sealing between the gun body and the gun head and prevent liquid or other impurities from entering the charging gun. The gun head includes a gun head shell 801, the gun head shell 801 is provided with a first cavity, a gun head back cover 803 is arranged in the first cavity, the gun head back cover 803 is provided with a plurality of first mounting grooves, and the liquid cooling terminal 1 is clamped on the first mounting groove. The charging gun is also provided with an O-ring 802, and the O-ring 802 is sleeved on the outer wall of the liquid cooling terminal 1 to prevent rain and dust from entering the interior of the charging gun. The gun head back cover 803 is also provided with a plurality of second mounting grooves, and a signal terminal 805 is penetrated in the second mounting groove. The charging gun is also provided with a fixing member 806, and the gun head shell 801 and the gun head back cover 803 are provided with fixing holes corresponding to the fixing member 806, and the fixing member 806 passes through the fixing hole to fix the gun head shell 801 and the gun head back cover 803. Preferably, the charging gun has two groups of liquid-cooled terminals 1, and the rear cover 803 of the gun head has two first mounting grooves, and the liquid-cooled terminals 1 are clamped on the first mounting grooves, so that the gun head is connected to the two groups of liquid-cooled terminals 1. Specifically, the two first mounting grooves are arranged horizontally, so that the two groups of liquid-cooled terminals 1 are arranged horizontally, and the liquid inlet block 103 and the liquid outlet 104 of each group of liquid-cooled terminals 1 are distributed vertically, so that the overall structure is more compact. Each group of liquid-cooled terminals 1 has a group of cables 70, and a group of cables 70 includes two wiring harnesses 70a. The cable used in the charging gun has two groups of cables 70, with a total of four wiring harnesses 70a, of which two wiring harnesses 70a include a liquid inlet pipe 20, a power conductor 701, and an outer sheath 703 from the inside to the outside, and the other two wiring harnesses 70a include a liquid outlet pipe 30, a power conductor 701, and an outer sheath 703 from the inside to the outside; two groups of cooling circuits are formed to further improve the heat dissipation efficiency of the cable. The specific structure of the liquid-cooled terminal 1 refers to the above embodiment. Since the charging gun adopts all the technical solutions of the above embodiment, it at least has all the beneficial effects brought by the technical solutions of the above embodiment, which will not be described one by one here.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A liquid-cooled terminal, characterized in that: include: The pin housing comprises a pin end, wherein a cavity is provided inside the pin end, and a liquid inlet and a liquid outlet are provided on the inner wall of the cavity; The pin core is arranged in the cavity, and the pin core includes a partition plate, the width of which is adapted to the diameter of the cavity, so that the side wall of the partition plate is closely fitted to the inner wall of the cavity, and there is a gap between the front end of the partition plate and the bottom end of the cavity; The partition plate divides the cavity into two interconnected liquid cooling channels, and the two liquid cooling channels are respectively connected to the liquid inlet and the liquid outlet, so as to realize the flow of cooling liquid from the liquid inlet to the liquid cooling channel and the liquid outlet.

2. The liquid-cooled terminal according to claim 1, characterized in that: The liquid cooling terminal further comprises a cable, wherein the cable comprises a power conductor, a liquid inlet pipe and a liquid outlet pipe; The pin housing further comprises a wiring terminal arranged at the rear side of the pin end, the wiring terminal is connected with a power conductor, and the power conductor is conductively connected to the pin housing through the wiring terminal; The liquid inlet pipe is arranged at the liquid inlet and communicated with the containing cavity; The liquid outlet pipe is arranged at the liquid outlet and communicated with the containing cavity.

3. The liquid-cooled terminal according to claim 2, characterized in that: The cable includes two wiring harnesses, one of which includes a liquid inlet pipe, a power conductor, and an outer sheath from the inside to the outside, and the other of which includes a liquid outlet pipe, a power conductor, and an outer sheath from the inside to the outside.

4. The liquid-cooled terminal according to claim 1, characterized in that: The liquid inlet and the liquid outlet are arranged on both sides of the partition plate, and the liquid inlet and the liquid outlet are communicated with the two liquid cooling channels respectively.

5. The liquid-cooled terminal according to claim 1, characterized in that: The pin core also includes an inserting portion arranged at the rear end of the partition plate, the inserting portion is inserted in the cavity, and the diameter of the inserting portion is adapted to the diameter of the cavity, so that the inserting portion is tightly fitted with the inner wall of the cavity.

6. The liquid-cooled terminal according to claim 2, characterized in that: The pin end is provided with a raised liquid inlet block and a liquid outlet block, the liquid inlet is an "L"-shaped liquid inlet channel arranged in the liquid inlet block, one end of the liquid inlet is connected to the cavity, and the other end is connected to the liquid inlet pipe; the liquid outlet is an "L"-shaped liquid outlet channel arranged in the liquid outlet block, one end of the liquid outlet is connected to the cavity, and the other end is connected to the liquid outlet pipe.

7. The liquid-cooled terminal according to claim 6, characterized in that: The liquid inlet block is provided with an additional hole communicated with the liquid inlet, and the additional hole is connected to a blocking piece for opening or closing the additional hole.

8. The liquid-cooled terminal according to claim 2, characterized in that: The liquid cooling terminal also includes two adapters for connecting the liquid inlet pipe and the liquid outlet pipe to the pin housing respectively.

9. The liquid-cooled terminal according to claim 8, characterized in that: The adapter includes an adapter tube and a baffle portion arranged on the outer circumferential surface of the adapter tube, and the adapter tube forms a first sub-adapter tube and a second sub-adapter tube on both sides of the baffle portion, respectively, wherein the first sub-adapter tubes of the two adapters are respectively connected to the liquid inlet and the liquid outlet, and the second sub-adapter tubes of the two adapters are respectively connected to the liquid inlet pipe and the liquid outlet pipe.

10. A charging gun, characterized in that: The invention comprises a housing, and a plurality of liquid-cooled terminals according to any one of claims 1 to 9.

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