Liquid cooling terminal structure and charging gun

Abstract

The utility model discloses a liquid cooling terminal structure and a charging gun with the same, and the structure comprises a terminal main body which is provided with a first end and a second end which are opposite to each other; the terminal male pin is formed at the first end; the first pipe connector is formed on the periphery of the second end and used for being connected with a first water pipe; the first mounting hole is formed in the second end, located on the inner side of the first pipe connector and used for being connected with a cable; and the mounting seat is integrally formed on the side wall of the terminal main body, a second mounting hole for communicating the exterior of the mounting seat with the first mounting hole is formed in the mounting seat, and the second water pipe is mounted on the terminal main body through the mounting seat and is communicated with the first mounting hole through the second mounting hole. The cable is located in the first water pipe, after the first water pipe is filled with cooling liquid, the cable is soaked in the cooling liquid, the contact area of the cooling liquid and the cable is large, and the heat conduction effect is good; and meanwhile, the terminal male pin, the first pipe interface and the mounting seat are of an integrated structure, so that the assembly is simpler, connection can be realized without excessive parts, and the assembly efficiency can be improved.

Description

Technical Field

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

[0002] With the rapid development of new energy electric vehicles, the charging and discharging equipment used for electric vehicles has also evolved rapidly. In this era of fast charging, high-power charging has become the mainstream choice. Traditional charging guns generate a large amount of heat in a short period of time, causing the gun's temperature to rise rapidly, increasing its thermal resistance, resulting in a decrease in charging current and efficiency. When current passes through the power terminals, it easily causes the terminals and cables to heat up, limiting the charging power. To achieve higher charging power and faster charging of electric vehicles, liquid-cooled charging guns have emerged. These utilize a liquid cooling system to cool the terminals and cables, thereby increasing their current-carrying capacity.

[0003] There are two main ways to cool the terminals and cables of existing liquid-cooled charging guns. One is to add a liquid cooling tube separately from the cable and then connect it to the terminal for cooling. The other is to directly insert the power cable into the liquid cooling tube and directly immerse the cable for cooling.

[0004] However, the existing liquid cooling method of adding a liquid cooling tube separately has a poor cooling effect. The terminals are prone to aging if they work at excessively high temperatures for a long time, which shortens the service life of the charging gun. At the same time, there is a gap between the coolant and the cable due to the wall of the cooling tube, which affects the cooling and heat dissipation of the cable end.

[0005] The existing liquid cooling method of immersing the cable is relatively complicated to assemble and crimp the terminals because the cable is in the liquid cooling tube, and the assembly cost is high. The charging gun will generate vibration and pressure during operation, which can easily damage the electronic components and cause the coolant to leak, causing damage to the charging gun. Utility Model Content

[0006] One purpose of the embodiments of the present utility model is to provide a liquid-cooled terminal structure which has a good heat dissipation effect, prevents the terminal from working at high temperature for a long time, and can extend the service life of the terminal.

[0007] Another object of the embodiments of the present invention is to provide a charging gun with high charging efficiency and long service life.

[0008] To achieve the above objectives, this application adopts the following technical solutions:

[0009] In one aspect, a liquid-cooled terminal structure is provided, comprising:

[0010] A terminal body having a first end and a second end that are separated from each other;

[0011] a terminal male pin formed at the first end;

[0012] a first pipe interface formed with an outer periphery of the second end for connecting to a first water pipe;

[0013] a first mounting hole formed at the second end and located inside the first pipe interface, for connecting a cable;

[0014] The mounting seat is integrally formed on the side wall of the terminal body, and is formed with a second mounting hole connecting the outside of the mounting seat and the first mounting hole. The second water pipe is installed on the terminal body through the mounting seat and connected to the first mounting hole through the second mounting hole.

[0015] Optionally, the first water pipe is a water inlet pipe and the second water pipe is a water return pipe, or the first water pipe is a water return pipe and the second water pipe is a water inlet pipe.

[0016] Optionally, a side wall of the first mounting hole forms a cable crimping portion, and the cable crimping portion clamps the cable installed in the first mounting hole by means of extrusion deformation.

[0017] Optionally, the mounting seat is a boss formed on the periphery of the terminal body, having a first mounting surface, and the second mounting hole is formed on the first mounting surface.

[0018] Optionally, a pipe joint is further included, and the second water pipe is installed on the first installation surface through the pipe joint.

[0019] Optionally, the pipe joint includes a joint body, and the joint body is provided with a first connecting pipe and a second connecting pipe, the first connecting pipe is used to connect to the second mounting hole, and the second connecting pipe is used to connect to the second water pipe.

[0020] Optionally, a sealing gasket is provided between the end surface of the first connecting pipe facing the terminal body and the terminal body.

[0021] Optionally, a plurality of relief grooves are provided on the surface of the connector body facing the terminal body.

[0022] Optionally, a first sealing groove is provided at the first pipe interface, and the first water pipe and the first pipe interface are sealed by a first sealing ring provided in the first sealing groove, and the first water pipe is fixed to the first pipe interface by a first clamp;

[0023] And / or, a second sealing groove is provided on the periphery of the second connecting pipe, the second connecting pipe and the second water pipe are sealed by a second sealing ring provided in the second sealing groove, and the second water pipe is fixed to the second connecting pipe by a second clamp.

[0024] On the other hand, a charging gun is provided, having the liquid-cooling terminal structure as described above.

[0025] The beneficial effects of the present application are as follows: in the present application, a first mounting hole is provided at the second end of the terminal body for installing a cable, and a first pipe interface is formed on the outer periphery of the second end for connecting to a first water pipe, so that the cable is located inside the first water pipe. When the first water pipe is filled with coolant, the cable is immersed in the coolant, and the contact area between the coolant and the cable is large, and the heat conduction effect is good; at the same time, the terminal male pin, the first pipe interface and the mounting seat are an integrated structure, which makes the assembly structure of the first water pipe and the second water pipe with the terminal body simpler, and the connection can be achieved without too many components, which can simplify the installation structure and improve the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present application is further described in detail below with reference to the accompanying drawings and examples.

[0027] Figure 1 This is a schematic diagram of the three-dimensional structure of the liquid-cooled terminal structure according to an embodiment of the present application;

[0028] Figure 2 This is a schematic diagram of the exploded state of the liquid-cooling terminal structure according to an embodiment of the present application;

[0029] Figure 3 This is a schematic structural diagram of the liquid-cooling terminal structure according to an embodiment of the present application from one perspective;

[0030] Figure 4 for Figure 3 Middle AA section view;

[0031] Figure 5 for Figure 4 Enlarged view at point I in the middle;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of the terminal body according to an embodiment of the present application;

[0033] Figure 7 This is a schematic structural diagram of the terminal body according to an embodiment of the present application from one perspective;

[0034] Figure 8 for Figure 7 Middle BB section view;

[0035] Figure 9 This is a schematic diagram of the three-dimensional structure of the pipe joint according to an embodiment of the present application from one perspective;

[0036] Figure 10 This is a schematic diagram of the three-dimensional structure of the pipe joint according to the embodiment of the present application from another perspective;

[0037] Figure 11 This is a schematic diagram of the three-dimensional structure of the sealing gasket described in an embodiment of the present application.

[0038] In the picture:

[0039] 100. Terminal body; 110. Terminal male pin; 120. First pipe interface; 121. First clamp; 122. First sealing groove; 123. First sealing ring; 130. First mounting hole; 131. Cable crimping portion; 140. Mounting seat; 141. First mounting hole; 142. First mounting surface; 200. First water pipe; 300. Second water pipe; 400. Cable; 500. Pipe joint; 510. Joint body; 511. First connecting pipe; 512. Second connecting pipe; 5121. Second sealing groove; 5122. Second sealing ring; 5123. Second clamp; 513. Clearance groove; 600. Sealing gasket; 610. First sealing surface; 620. Second sealing surface; 630. Arc-shaped rib. DETAILED DESCRIPTION

[0040] 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.

[0041] In the description of this application, unless otherwise 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, electrical connections; direct connections, or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] 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.

[0043] A liquid-cooled charging gun is a charging device that uses liquid cooling technology to effectively manage the high temperatures generated during the charging process. Compared to traditional air-cooled charging guns, liquid-cooled charging guns can dissipate heat more effectively, allowing the charging pile to provide higher current and power, thereby shortening charging time. Liquid-cooled charging guns can also reduce heat generation during charging, thereby reducing the risk of fire and explosion. Liquid-cooled charging guns can also lower the temperature of charging cables and connectors, thereby extending their service life. Liquid-cooled charging guns can also reduce noise during charging, thereby reducing the impact on the environment. The working principle of a liquid-cooled charging gun is to set up a dedicated liquid circulation channel between the charging cable and the charging gun. Liquid coolant is added to the channel to dissipate heat. A power pump is used to circulate the coolant, thereby dissipating the heat generated during charging.

[0044] There are two main ways to cool the terminals and cables of existing liquid-cooled charging guns. One is to add a liquid cooling tube separately from the cable and then connect it to the terminal for cooling. The other is to directly insert the power cable into the liquid cooling tube and directly immerse the cable for cooling.

[0045] However, the existing liquid cooling method of adding a liquid cooling tube separately has a poor cooling effect. The terminals are prone to aging if they work at excessively high temperatures for a long time, which shortens the service life of the charging gun. At the same time, there is a gap between the coolant and the cable due to the wall of the cooling tube, which affects the cooling and heat dissipation of the cable end.

[0046] The existing liquid cooling method of immersing the cable is relatively complicated to assemble and crimp the terminals because the cable is in the liquid cooling tube, and the assembly cost is high. The charging gun will generate vibration and pressure during operation, which can easily damage the electronic components and cause the coolant to leak, causing damage to the charging gun.

[0047] Based on the above, the present application provides an immersion liquid-cooled terminal structure with a simple structure and easy assembly, which can ensure the cooling effect while having a simple structure and easy assembly.

[0048] Specifically, refer to Figure 1-11As shown, an embodiment of the present application provides a liquid-cooled terminal structure, including a terminal body 100, which is a columnar structure and has a first end and a second end that are separated from each other. The first end forms a terminal male pin 110, and the outer periphery of the second end forms a first pipe interface 120 for connecting to a first water pipe 200, and the second end is located on the inner side of the first pipe interface 120 and is provided with a first mounting hole 130 for installing a cable 400 along its axial direction; a mounting seat 140 for connecting a second water pipe 300 is formed on the side wall of the terminal body 100 and is integrally formed with the terminal body 100, and a second mounting hole 141 is formed on the mounting seat 140 to connect the outside of the mounting seat 140 and the first mounting hole 130, and the second water pipe 300 is installed on the terminal body 100 through the mounting seat 140 and is connected to the first mounting hole 130 through the second mounting hole 141.

[0049] In this application, a first mounting hole 130 is provided at the second end of the terminal body 100 for installing the cable 400, and a first pipe interface 120 is formed on the outer periphery of the second end for connecting to the first water pipe 200, so that the cable 400 is located inside the first water pipe 200. When the first water pipe 200 is filled with coolant, the cable 400 is immersed in the coolant, and the contact area between the coolant and the cable 400 is large, and the heat conduction effect is good; at the same time, the terminal male pin 110, the first pipe interface 120 and the mounting seat 140 are an integrated structure, which makes the assembly structure of the first water pipe 200 and the second water pipe 300 with the terminal body 100 simpler, and the connection can be achieved without too many components, which can simplify the installation structure and improve the assembly efficiency.

[0050] Specifically, refer to Figure 1-5 As shown, the first water pipe 200 is the water inlet pipe and the second water pipe 300 is the water return pipe. The coolant circulates in the direction of flowing from the water inlet pipe to flowing out of the return pipe. It can be understood that the coolant circulation needs to form a complete loop, so other necessary pipelines are required, and the entire loop should also include structures such as the coolant circulation power system and the water replenishment system. The specific pipeline layout, the specific structure of the coolant circulation power system and the water replenishment system belong to the customary technical means of those skilled in the art and will not be described in detail in this application.

[0051] It should be pointed out that the above-mentioned first water pipe 200 is a water inlet pipe and the second water pipe 300 is a water return pipe, which is not a limitation to the present application. In other embodiments, the first water pipe 200 can be a water return pipe and the second water pipe 300 can be a water inlet pipe.

[0052] In the embodiment of the present application, the coolant flowing in the first water pipe 200 and the second water pipe 300 can be pure water, deionized water, ethylene glycol aqueous solution or other liquids with good thermal conductivity, fluidity and antifreeze properties.

[0053] The embodiment of the present application also provides a specific connection structure between the cable 400 and the terminal body 100, referring to Figure 2-8 As shown, the side wall of the first mounting hole 130 forms a cable crimping portion 131, and the cable crimping portion 131 is clamped and installed in the first mounting hole 130 by means of extrusion deformation. In the present application, the cable crimping portion 131 can be crimped using a crimping device. Before crimping, the first mounting hole 130 and the cable 400 are both circular structures, and the diameter of the first mounting hole 130 is larger than the diameter of the cable 400. After crimping, the cable 400 is flattened, but there are still gaps between the wire cores of the cable 400, and gaps are formed between the first mounting hole 130 and certain areas of the cable 400, so that the coolant can enter the above-mentioned gaps and gaps in the cable crimping portion 131, thereby increasing the contact area between the coolant and the cable 400 and achieving a better heat dissipation effect.

[0054] Reference Figure 6-8 As shown, the mounting seat 140 is a boss formed on the periphery of the terminal body 100, and the overall structure is a rectangular structure, having a first mounting surface 142, and the second mounting hole 141 is formed on the first mounting surface 142. It can be understood that any one of the four surfaces of the mounting seat 140 described in this application can be used to install the second water pipe 300.

[0055] Furthermore, the liquid cooling terminal structure further includes a pipe joint, and the second water pipe 300 is installed on the first installation surface 142 through the pipe joint. Figure 9 、 10 As shown, the pipe joint includes a joint body 510, and a first connecting pipe 511 and a second connecting pipe 512 are provided on the joint body 510. The first connecting pipe 511 is used to connect to the second mounting hole 141, and the second connecting pipe 512 is used to connect to the second water pipe 300. A sealing gasket 600 is provided between the end surface of the first connecting pipe 511 facing the terminal body 100 and the terminal body 100. In this embodiment, the sealing gasket 600 is provided on the end surface where the terminal body 100 and the first connecting pipe 511 meet. Compared with the traditional structure in which a sealing ring is provided on the side wall, the problem of displacement or falling off of the sealing ring on the side wall during installation, resulting in an unsatisfactory sealing effect, can be avoided. This solution can effectively ensure the position of the sealing gasket 600 to achieve precise sealing.

[0056] Specifically, refer to Figure 11As shown, the sealing gasket 600 in the embodiment of the present application is an annular structure, having a first sealing surface 610 and a second sealing surface 620 relative to each other, the first sealing surface 610 abuts against the end face of the first connecting pipe 511 toward the terminal body 100, and the second sealing surface 620 abuts against the end face of the terminal body 100 toward the first connecting pipe 511, and the first sealing surface 610 and the second sealing surface 620 are both provided with arc-shaped ribs 630, and the surface contact seal is converted into a line contact seal by the arc-shaped ribs 630, which can avoid the problem of poor sealing effect caused by insufficient processing precision during surface contact.

[0057] Further, refer to Figure 10 As shown, in the present application, a plurality of clearance grooves 513 are provided on the surface of the connector body 510 facing the terminal body 100. In this embodiment, the connector body 510 is fastened to the mounting base 140 by bolts. The provision of the clearance grooves 513 allows the connector body 510 to undergo significant deformation when the bolts are tightened on the connector body 510, thereby providing a certain elastic pre-tightening force, making the connection between the connector body 510 and the mounting base 140 tighter and more reliable.

[0058] Preferably, refer to Figure 2 As shown, a first sealing groove 122 is provided at the first pipe interface 120, and the first water pipe 200 and the first pipe interface 120 are sealed by a first sealing ring 123 provided in the first sealing groove 122, and the first water pipe 200 is fixed to the first pipe interface 120 by a first clamp 121;

[0059] And / or, a second sealing groove 5121 is provided around the second connecting pipe 512, and the second connecting pipe 512 and the second water pipe 300 are sealed by a second sealing ring 5122 provided in the second sealing groove 5121, and the second water pipe 300 is fixed to the second connecting pipe 512 by a second clamp 5123.

[0060] At the same time, an embodiment of the present application also provides a charging gun having the liquid-cooled terminal structure as described above. The charging gun has good cooling effect, high charging efficiency and long service life.

[0061] 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.

[0062] Throughout this specification, references to terms such as "one embodiment" and "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 invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example.

[0063] 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.

[0064] 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 body (100) having a first end and a second end that are separated from each other; a terminal male pin (110) formed at the first end; a first pipe interface (120), formed with the outer periphery of the second end, for connecting to a first water pipe (200); a first mounting hole (130) formed at the second end and located inside the first pipe interface (120) for connecting a cable (400); The mounting seat (140) is integrally formed on the side wall of the terminal body (100), and is formed with a second mounting hole (141) that connects the outside of the mounting seat (140) and the first mounting hole (130). The second water pipe (300) is installed on the terminal body (100) through the mounting seat (140) and is connected to the first mounting hole (130) through the second mounting hole (141).

2. The liquid cooling terminal structure according to claim 1, characterized in that: The first water pipe (200) is a water inlet pipe, and the second water pipe (300) is a water return pipe, or the first water pipe (200) is a water return pipe, and the second water pipe (300) is a water inlet pipe.

3. The liquid cooling terminal structure according to claim 1, characterized in that: A cable crimping portion (131) is formed on a side wall of the first mounting hole (130), and the cable crimping portion (131) clamps the cable (400) mounted in the first mounting hole (130) by means of extrusion deformation.

4. The liquid cooling terminal structure according to claim 1, characterized in that: The mounting seat (140) is a boss formed on the periphery of the terminal body (100), and has a first mounting surface (142), and the second mounting hole (141) is formed on the first mounting surface (142).

5. The liquid cooling terminal structure according to claim 4, characterized in that: It also includes a pipe joint, through which the second water pipe (300) is installed on the first installation surface (142).

6. The liquid cooling terminal structure according to claim 5, characterized in that: The pipe joint comprises a joint body (510), and a first connecting pipe (511) and a second connecting pipe (512) are provided on the joint body (510), wherein the first connecting pipe (511) is used for connecting to the second mounting hole (141), and the second connecting pipe (512) is used for connecting to the second water pipe (300).

7. The liquid cooling terminal structure according to claim 6, characterized in that: A sealing gasket (600) is provided between the end surface of the first connecting pipe (511) facing the terminal body (100) and the terminal body (100).

8. The liquid cooling terminal structure according to claim 6, characterized in that: A plurality of clearance grooves (513) are provided on the surface of the connector body (510) facing the terminal body (100).

9. The liquid cooling terminal structure according to claim 6, characterized in that: A first sealing groove (122) is provided at the first pipe interface (120); the first water pipe (200) and the first pipe interface (120) are sealed by a first sealing ring (123) provided in the first sealing groove (122); and the first water pipe (200) is fixed to the first pipe interface (120) by a first clamp (121); And / or, a second sealing groove (5121) is provided on the periphery of the second connecting pipe (512), the second connecting pipe (512) and the second water pipe (300) are sealed by a second sealing ring (5122) provided in the second sealing groove (5121), and the second water pipe (300) is fixed to the second connecting pipe (512) by a second clamp (5123).

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

Images