Liquid-cooled connection terminal of a charging gun

Abstract

The present invention relates to a liquid-cooled connection terminal of a charging gun, comprising a terminal body, wherein the interior of the terminal body is a first cavity, the terminal body is provided with a first liquid inlet and a first liquid outlet, and a flow guide tube is provided in the first cavity; the terminal body is also sleeved with an annular heat-conducting cylinder, and a heat-insulating block is provided between the inner wall of the cylinder and the outer wall of the terminal body; the interior of the cylinder is a second cavity, and the cylinder is provided with a second liquid inlet and a second liquid outlet; the terminal body is provided with a plurality of contact areas spaced along its length direction, each contact area is an annular area provided along the circumference of the terminal body, and at least two groups of through holes are uniformly distributed along the circumference of the terminal body in each contact area, the through holes penetrate the side wall of the terminal body, and the through holes are provided with heat-conducting blocks and connectors. This structural design can effectively improve the heat dissipation performance of the liquid-cooled terminal, and can also effectively suppress the temperature rise of the liquid-cooled terminal.

Description

Technical Field

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

[0002] With the development of society, new energy vehicles have been favored by more and more consumers. As the most important supporting facilities for new energy vehicles, charging piles are becoming more and more popular.

[0003] When charging new energy vehicles, the charging terminals, cables and charging sockets of the charging gun will heat up, especially for charging piles and vehicles that use high-current charging solutions. The charging terminals of the charging gun will heat up seriously and easily reach high temperatures. Excessive temperature limits the charging power, resulting in a long charging time, and may also cause equipment damage and increase safety risks.

[0004] Currently, the charging guns on the market generally adopt natural cooling or limit the charging power to deal with heat and high temperature. The heat dissipation efficiency is low, which is not conducive to shortening the charging time and needs to be improved. Summary of the invention

[0005] Based on the above description, the present invention provides a liquid-cooled terminal of a charging gun, which can effectively improve the heat dissipation performance of the charging terminal.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] A liquid-cooled connecting terminal of a charging gun comprises a terminal body, a front end of the terminal body having a contact portion, a rear end of the terminal body being integrally provided with a connecting seat, a partition being provided between the connecting seat and the interior of the terminal body, the interior of the terminal body being a hollow structure to form a first cavity, a first liquid inlet and a first liquid outlet being provided at a position close to the connecting seat on the outer wall of the terminal body, the first liquid inlet and the first liquid outlet being both connected to the first cavity; a flow guide tube being provided in the first cavity, the flow guide tube being provided along the length direction of the terminal body, the rear end of the flow guide tube being fixed to the terminal body and connected to the first liquid inlet, and a distance being provided between the front end of the flow guide tube and the inner wall of the front end of the terminal body; an annular heat-conducting cylinder is also sleeved on the outside of the terminal body, a gap is left between the inner wall of the cylinder and the outer wall of the terminal body, and an insulating block is provided between the inner wall of the cylinder and the outer wall of the terminal body; the interior of the cylinder is a hollow structure to form an annular second cavity, The cylinder is provided with a second liquid inlet and a second liquid outlet, one end of the second liquid inlet is connected to the second cavity and the other end of the second liquid inlet is connected to the first liquid inlet, one end of the second liquid outlet is connected to the second cavity and the other end of the second liquid outlet is connected to the first liquid outlet; a plurality of contact areas are spaced apart along the length direction of the terminal body, each contact area is an annular area arranged along the circumference of the terminal body, at least two groups of through holes are evenly distributed along the circumference of the terminal body in each contact area, the through hole passes through the side wall of the terminal body, a heat conductive block and a connecting member are arranged in the through hole; the connecting member is an integrated structure, which comprises an annular connecting portion, an elastic portion and a sealing portion in sequence, wherein the connecting portion is filled in the edge of the through hole and is connected and sealed with the inner wall of the terminal body, an annular groove is arranged on the side of the heat conductive block along its circumference, the sealing portion is embedded in the groove and is sealed and fixed to the heat conductive block; when no coolant is passed into the terminal body, the heat conductive block is hidden in the through hole.

[0008] As a preferred solution: along the direction approaching the front end of the terminal body, the elastic coefficient of the elastic part of the connector in each contact area gradually increases.

[0009] As a preferred solution: a movable sleeve is also provided in the first cavity, the movable sleeve is located at the front end of the guide tube and is sleeved on the outside of the guide tube; a fixed block is provided on the outer wall of the front end of the guide tube and behind the movable sleeve, and the rear part of the movable sleeve is connected to the fixed block through a spring; a stirring net is fixed inside the front end of the movable sleeve.

[0010] As a preferred solution: a guide piece is arranged in the first liquid outlet, the guide piece is a hollow structure and its cross-section shape is arc-shaped, the guide piece covers the second liquid outlet, and an opening is arranged on a surface of the guide piece close to the outer side of the terminal body, and the opening connects the first liquid outlet with the second liquid outlet.

[0011] As a preferred solution: a one-way valve is installed at the second liquid outlet, and the one-way valve allows the flow to flow from the second cavity to the first liquid outlet.

[0012] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects: the liquid-cooled terminal is provided with a cylinder outside the terminal body, a first cavity is provided inside the terminal body, and a second cavity is provided inside the cylinder, and a movable heat-conducting block is provided on the terminal body, and the heat-conducting block is used to conduct heat between the first cavity and the second cavity. When the temperature of the terminal body is low, the terminal body is dissipated heat only by the coolant in the first cavity, while the coolant in the second cavity is maintained at a relatively low temperature; when the temperature of the terminal body continues to rise, the hydraulic pressure drives the heat-conducting block to contact the cylinder, so that the heat-conducting block conducts the heat in the first cavity to the second cavity, and at this time, the coolant in the first cavity and the second cavity jointly dissipates heat and cools the liquid-cooled terminal. This structural design can effectively improve the heat dissipation performance of the liquid-cooled terminal and effectively suppress the rapid rise of the temperature of the liquid-cooled terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the internal structure of the liquid cooling connection terminal in the first embodiment;

[0014] Figure 2 for Figure 1 A magnified view of part A in FIG.

[0015] Figure 3 is a cross-sectional view of the connecting member in the first embodiment;

[0016] Figure 4 Schematic diagram of the distribution of the contact area in Example 1

[0017] Figure 5 for Figure 1 A magnified view of part B in FIG.

[0018] Figure 6 for Figure 1 The enlarged view of the C part in FIG.

[0019] Figure 7 This is a schematic diagram of the installation position of the one-way valve in Example 2.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Terminal body; 2. Contact part; 3. First cavity; 4. Connecting seat; 5. Partition; 6. External thread; 7. Flow guide tube; 8. First liquid inlet; 9. First liquid outlet; 10. Cylinder; 11. Second cavity; 12. Second liquid inlet; 13. Second liquid outlet; 14. Through hole; 15. Heat conduction block; 16. Elastic part; 17. Connecting part; 18. Groove; 19. Sealing part; 20. Heat insulation block; 21. Temperature sensor; 22. Movable sleeve; 23. Fixed block; 24. Spring; 25. Flow guide; 26. Opening; 27. Agitation net; 28. One-way valve; I. First contact area; II. Second contact area; III. Third contact area. DETAILED DESCRIPTION

[0022] Reference Figure 1 A liquid-cooled connection terminal of a charging gun includes a terminal body 1. The front end of the terminal body 1 is provided with a contact portion 2, which is used to contact the conductive terminal in the vehicle charging interface; the rear end of the terminal body 1 is integrally provided with a connection seat 4, which is used to fix the terminal body 1 and the handle of the charging gun and the connection seat 4 is used to connect the output cable of the charging host; a partition 5 is provided between the connection seat 4 and the inside of the terminal body 1.

[0023] An external thread 6 is provided on the outer wall of the connecting seat 4; the interior of the terminal body 1 is a hollow structure to form a first cavity 3, and a first liquid inlet 8 and a first liquid outlet 9 are respectively provided on the outer wall of the terminal body 1 near the connecting seat 4, and the first liquid inlet 8 and the first liquid outlet 9 are both connected to the first cavity 3.

[0024] The first liquid inlet 8 and the first liquid outlet 9 are both used to connect to an external cooling liquid circulation system.

[0025] A flow guide tube 7 is also arranged in the first cavity 3. The flow guide tube 7 is arranged along the length direction of the terminal body 1 and is coaxial with the terminal body 1. The rear end of the flow guide tube 7 is fixed to the terminal body 1 and connected to the first liquid inlet 8. There is a distance between the front end of the flow guide tube 7 and the inner wall of the front end of the terminal body 1.

[0026] Reference Figure 1 and Figure 2 A heat-conducting cylinder 10 in the shape of an annular shape is also sleeved on the outside of the terminal body 1. The cylinder 10 is coaxially arranged with the terminal body 1. The inner wall diameter of the cylinder 10 is larger than the outer wall diameter of the terminal body 1, that is, there is a gap between the inner wall of the cylinder 10 and the outer wall of the terminal body 1. A heat-insulating block 20 is arranged between the inner wall of the cylinder 10 and the outer wall of the terminal body 1. The heat-insulating block 20 can support and fix the cylinder 10 and isolate heat, and can effectively prevent the heat on the terminal body 1 from being transferred to the cylinder 10.

[0027] The interior of the cylinder 10 is a hollow structure to form an annular second cavity 11, and a second liquid inlet 12 and a second liquid outlet 13 are provided on the cylinder 10. One end of the second liquid inlet 12 is connected to the second cavity 11 and the other end of the second liquid inlet 12 is connected to the first liquid inlet 8; one end of the second liquid outlet 13 is connected to the second cavity 11 and the other end of the second liquid outlet 13 is connected to the first liquid outlet 9.

[0028] The above structure allows the external coolant to flow into the first cavity 3 through the first liquid inlet 8, and also flow into the second cavity 11 through the second liquid inlet 12; the coolant in the first cavity 3 can flow out from the first liquid outlet 9, and the coolant in the second cavity 11 can flow into the first liquid outlet 9 through the second liquid outlet 13, and then flow out from the first liquid outlet 9.

[0029] Referring to 4, the first contact area (as shown by the area framed by the dotted frame Ⅰ in the figure), the second contact area (as shown by the area framed by the dotted frame Ⅱ in the figure) and the third contact area (as shown by the area framed by the dotted frame Ⅲ in the figure) are spaced apart along the length direction of the terminal body 1, and each contact area is an annular area arranged along the circumference of the terminal body 1. In each contact area, at least two groups of through holes 14 are evenly distributed along the circumference of the terminal body 1, and the through holes 14 penetrate the side wall of the terminal body 1.

[0030] Reference Figure 1 , Figure 2 and Figure 3 , a heat conducting block 15 and a connecting piece are arranged in the through hole 14. Figure 3 As shown, the connector is an integrated structure, which includes an annular connecting portion 17, an elastic portion 16 and a sealing portion 19 in sequence. The connecting portion 17 is filled in the edge of the through hole 14 and is connected and sealed with the inner wall of the terminal body 1; an annular groove 18 is provided on the side of the heat-conducting block 15 along its circumference, and the sealing portion 19 is embedded in the groove 18 and sealed and fixed to the heat-conducting block 15. Such a structure can not only ensure the sealing between the heat-conducting block 15 and the terminal body 1, but also enable the heat-conducting block 15 to move outward and inward along the radial direction of the terminal body 1. When the heat-conducting block 15 is subjected to outward pressure, it will move outward, and the elastic portion is stretched at this time. When the external force is pulled away, the elastic force of the elastic portion drives the heat-conducting block 15 to move inward and reset.

[0031] In the initial state (ie, when no coolant is introduced into the terminal body 1 ), the heat conducting block 15 is hidden in the through hole 14 . In this state, the heat conducting block 15 is not in contact with the barrel 10 .

[0032] Before using the liquid-cooled terminal, it is necessary to install a temperature sensor 21 on the terminal body 1, and connect the first liquid inlet 8 and the first liquid outlet 9 to an external liquid cooling circulation system (the liquid cooling circulation system is generally composed of pipelines, liquid storage containers, liquid pumps and controllers). After the charging gun is plugged into the charging port of the vehicle, the liquid-cooled terminal contacts the conductive terminal in the charging port, and the liquid-cooled terminal starts to be energized, thereby charging the vehicle.

[0033] During the charging process, the liquid-cooled terminal generates heat and the temperature rises. The temperature sensor 21 detects the temperature of the terminal body 1 in real time and feeds back the temperature detection result to the controller of the liquid cooling circulation system. The controller compares the temperature detection value with the preset first temperature threshold. When the former is greater than the latter, the controller controls the liquid pump to start, and the liquid pump drives the coolant to circulate at a default flow rate.

[0034] The coolant flows into the guide tube 7 through the first liquid inlet 8, and then enters the first cavity 3 through the guide tube 7; at the same time, a part of the coolant flows into the second cavity 11 through the second liquid inlet 12. The coolant in the first cavity 3 flows out through the first liquid outlet 9; the coolant in the second cavity 11 flows into the first liquid outlet 9 through the second liquid outlet 13, and then flows out from the first liquid outlet 9.

[0035] Since the terminal body 1 is separated from the barrel 10 by the heat insulating block 20, and the heat is generated by the terminal body 1, when the heat conductive block 15 is not in contact with the barrel 10, the heat on the terminal body 1 can only be absorbed and taken away by the coolant in the first cavity 3, thereby dissipating heat and cooling the terminal body 1. In the charging state, when the heat conductive block 15 is not in contact with the barrel 10, the temperature of the coolant in the second cavity 11 is lower than that of the coolant in the first cavity 3.

[0036] After the liquid cooling mode is turned on, the liquid cooling system delivers coolant at a default flow rate. If it is subsequently detected that the temperature of the terminal body 1 continues to rise, the controller controls the liquid pump to gradually increase the speed when the temperature continues to rise, so that the liquid pump gradually increases the delivery flow rate of the coolant to increase the heat dissipation and cooling rate. During this process, the hydraulic pressure in the first cavity 3 and the second cavity 11 will also gradually increase.

[0037] When the hydraulic pressure in the first cavity 3 reaches a certain value, the liquid squeezing force applied to the heat conductive block 15 causes the heat conductive block 15 to start moving outward until the heat conductive block 15 contacts the inner wall of the cylinder 10. After the heat conductive block 15 contacts the inner wall of the cylinder 10, part of the heat carried by the coolant in the first cavity 3 is transferred to the coolant in the second cavity 11 through the heat conductive block 15. At this time, the coolant in the first cavity 3 and the coolant in the second cavity 11 jointly absorb and take away the heat on the liquid-cooled terminal, which can achieve more efficient heat dissipation and cooling of the liquid-cooled terminal. The existence of the second cavity 11 allows the liquid cooling system to have a margin, and can more effectively cope with the sudden temperature rise of the liquid-cooled terminal.

[0038] In this embodiment, the elastic coefficient of the elastic part 16 of the connector in each contact area gradually increases. Specifically, the closer the contact area is to the front end of the terminal body 1, the larger the elastic coefficient of the elastic part 16 of the connector. That is, the contact areas are sorted from small to large according to the elastic coefficient of the elastic part 16, and the order is first contact area I, second contact area II and third contact area III.

[0039] Generally speaking, during the charging process, the temperature of the terminal body 1 closer to the front is higher, and the temperature of the contact portion 2 is the highest.

[0040] After the liquid cooling mode is turned on, as the temperature of the liquid cooling terminal gradually increases, the flow rate and hydraulic pressure of the coolant pumped into the liquid cooling terminal gradually increase. When the hydraulic pressure in the first cavity 3 reaches a certain value, the coolant pushes the heat conductive block 15 in the first contact area outward to make it contact with the cylinder 10. At this time, the heat of the coolant in the first cavity 3 is transferred to the coolant in the second cavity 11 through the heat conductive block 15 in the first contact area.

[0041] When the hydraulic pressure in the first cavity 3 continues to increase to the next certain value, the coolant pushes the heat conductive block 15 in the second contact area outward to make it contact with the cylinder 10. At this time, the heat of the coolant in the first cavity 3 is transferred to the coolant in the second cavity 11 through the heat conductive blocks 15 in the first contact area and the second contact area.

[0042] When the hydraulic pressure in the first cavity 3 continues to increase to the next certain value, the coolant pushes the heat conductive block 15 in the third contact area outward to make it contact with the cylinder 10. At this time, the heat of the coolant in the first cavity 3 is transferred to the coolant in the second cavity 11 through the heat conductive blocks 15 in the first contact area, the second contact area and the third contact area.

[0043] Through the above solution, the liquid-cooled terminal has multi-level liquid cooling margin, which can better adapt to the situation where the temperature of the liquid-cooled terminal continues to rise.

[0044] In addition, since the temperature distribution characteristic of the liquid-cooled terminal is that the closer to the front end of the terminal body 1, the higher the temperature, the above scheme gradually increases the contact area between the liquid-cooled terminal and the barrel 10 when the temperature of the terminal body 1 is higher, and the newly added contact area is gradually close to the contact part 2 which is the part with the highest temperature, so it can achieve a more reasonable and efficient heat dissipation and cooling effect.

[0045] Reference Figure 1 and Figure 5 In this embodiment, a movable sleeve 22 is further provided in the first cavity 3. The movable sleeve 22 is located at the front end of the flow guide tube 7 and is sleeved on the outside of the flow guide tube 7.

[0046] A fixing block 23 is provided on the outer wall of the front end of the flow guide tube 7 and behind the movable sleeve 22 . The rear of the movable sleeve 22 is connected to the fixing block 23 via a spring 24 .

[0047] A stirring net 27 is fixed inside the front end of the movable sleeve 22. The stirring net 27 has two functions. First, the coolant will be stirred by the stirring net 27 when it flows out of the guide tube 7, so that the coolant can flow evenly from the outlet end of the movable sleeve 22 to the surroundings, which is conducive to more uniform heat dissipation of the liquid-cooled terminal as a whole.

[0048] The second function of the stirring net 27 is that when the coolant flows out of the guide tube 7, the stirring net 27 is subjected to the impact force of the liquid. The faster the liquid flow rate, the greater the impact force on the stirring net 27. When the impact force of the liquid on the stirring net 27 is greater than the pulling force of the spring 24 on the movable sleeve 22, the movable sleeve 22 will move forward.

[0049] In the liquid cooling mode, as the temperature of the terminal body 1 continues to rise, the flow rate and pressure of the coolant sent into the liquid-cooled terminal by the liquid pump become greater and greater, and the coolant pushes the movable sleeve 22 forward so that the movable sleeve 22 gradually approaches the contact portion 2, and the distance between the front end of the movable sleeve 22 and the inner wall of the front end of the terminal body 1 becomes smaller and smaller. When the coolant flows out of the movable sleeve 22, the space allowed for it to flow out becomes smaller and smaller, so that the coolant can flow more and more concentratedly to the inner side of the front end of the terminal body 1, which is conducive to more quickly and efficiently absorbing and taking away the heat from the higher temperature parts on the terminal body 1, especially the contact portion 2, thereby improving the heat dissipation and cooling effect.

[0050] In addition, the movable sleeve 22 and the heat conductive block 15 can also produce a combined effect. Specifically: in the liquid cooling mode, as the temperature of the terminal body 1 continues to rise, the greater the distance that the movable sleeve 22 moves forward, the coolant can be more and more concentrated to flow to the inner side of the front end of the terminal body 1, and because the flow rate of the coolant entering the first cavity 3 gradually increases, the heat conductive block 15 far from the front end of the terminal body 1 first contacts the cylinder 10, and then the heat conductive block 15 closer to the front end gradually contacts the cylinder 10, that is, the heat conduction path between the first cavity 3 and the second cavity 11 is shortened, and the effect achieved is to absorb and take away the heat of the higher temperature parts of the terminal body 1, especially the contact part 2, more quickly and efficiently, and the heat carried by the coolant after flowing through the front end of the terminal body 1 can be more quickly conducted to the second cavity 11, thereby improving the efficiency of heat dissipation and cooling.

[0051] As an optimization solution, refer to Figure 1 and Figure 6In this embodiment, a guide member 25 is arranged in the first liquid outlet 9. The guide member 25 is a hollow structure and its cross-sectional shape is an arc. The guide member 25 covers the second liquid outlet 13. An opening 26 is arranged on a surface of the guide member 25 close to the outer side of the terminal body 1. The opening 26 connects the first liquid outlet 9 with the second liquid outlet 13.

[0052] Since the guide member 25 is located in the first liquid outlet 9 and the guide member 25 is an arc-shaped raised structure, the flow rate of the coolant in the first cavity 3 will be accelerated when flowing out of the first liquid outlet 9, thereby reducing the pressure of the coolant in the first liquid outlet 9, effectively preventing the coolant in the first liquid outlet 9 from flowing back into the second cavity 11, which is beneficial to maintaining the relatively low temperature state of the coolant in the second cavity 11.

[0053] Embodiment 2:

[0054] Reference Figure 7 The difference between this embodiment and the first embodiment is that the guide member 25 is replaced by a one-way valve 28 in this embodiment. The one-way valve 28 is installed at the second liquid outlet 13, and the one-way valve 28 allows the flow direction to flow from the second cavity 11 to the first liquid outlet 9. After the one-way valve 28 is installed, the coolant in the first liquid outlet 9 can be better prevented from flowing back to the second cavity 11.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid-cooled connection terminal of a charging gun, comprising a terminal body, a front end of the terminal body having a contact portion, a rear end of the terminal body being integrally provided with a connection seat, and a partition being provided between the connection seat and the inside of the terminal body, wherein: The interior of the terminal body is a hollow structure to form a first cavity, and a first liquid inlet and a first liquid outlet are respectively arranged at a position close to the connecting seat on the outer wall of the terminal body, and the first liquid inlet and the first liquid outlet are both connected to the first cavity; a flow guide tube is arranged in the first cavity, and the flow guide tube is arranged along the length direction of the terminal body, and the rear end of the flow guide tube is fixed to the terminal body and connected to the first liquid inlet, and there is a distance between the front end of the flow guide tube and the inner wall of the front end of the terminal body; the outside of the terminal body is also provided with an annular heat-conducting cylinder, and a gap is left between the inner wall of the cylinder and the outer wall of the terminal body, and an insulating block is arranged between the inner wall of the cylinder and the outer wall of the terminal body; the interior of the cylinder is a hollow structure to form an annular second cavity, and a second liquid inlet and a second liquid outlet are arranged on the cylinder, and one end of the second liquid inlet is connected to the second cavity The terminal body is connected to the cavity and the other end of the second liquid inlet is connected to the first liquid inlet, one end of the second liquid outlet is connected to the second cavity and the other end of the second liquid outlet is connected to the first liquid outlet; a plurality of contact areas are spaced apart along the length direction of the terminal body, each contact area is an annular area arranged along the circumference of the terminal body, and at least two groups of through holes are evenly distributed along the circumference of the terminal body in each contact area, the through hole passes through the side wall of the terminal body, and a heat-conducting block and a connecting piece are arranged in the through hole; the connecting piece is an integrated structure, which comprises an annular connecting part, an elastic part and a sealing part in sequence, wherein the connecting part is filled in the edge of the through hole and is connected and sealed with the inner wall of the terminal body, an annular groove is arranged on the side of the heat-conducting block along its circumference, the sealing part is embedded in the groove and is sealed and fixed with the heat-conducting block; when no coolant is passed into the terminal body, the heat-conducting block is hidden in the through hole.

2. The liquid-cooled connection terminal of the charging gun according to claim 1, characterized in that: Along the direction approaching the front end of the terminal body, the elastic coefficient of the elastic portion of the connector in each contact area gradually increases.

3. The liquid-cooled connection terminal of the charging gun according to claim 2, characterized in that: A movable sleeve is also provided in the first cavity, and the movable sleeve is located at the front end of the guide tube and is sleeved on the outside of the guide tube; a fixed block is provided on the outer wall of the front end of the guide tube and behind the movable sleeve, and the rear part of the movable sleeve is connected to the fixed block through a spring; a stirring net is fixed inside the front end of the movable sleeve.

4. The liquid-cooled connection terminal of the charging gun according to claim 1, characterized in that: A guide piece is arranged in the first liquid outlet. The guide piece is a hollow structure with an arc-shaped cross-section. The guide piece covers the second liquid outlet. An opening is arranged on a surface of the guide piece close to the outer side of the terminal body. The opening connects the first liquid outlet with the second liquid outlet.

5. The liquid-cooled connection terminal of the charging gun according to claim 1, characterized in that: A one-way valve is installed at the second liquid outlet, and the one-way valve allows the flow to flow from the second cavity to the first liquid outlet.

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