Liquid cooling system and charging gun

Abstract

The utility model provides a liquid cooling system and a charging gun, relates to the technical field of conductive element cooling, and is used for solving the technical problems of poor heat dissipation efficiency and complex assembly of a conductive element in the related art. The liquid cooling system comprises a first liquid cooling unit, a second liquid cooling unit, a first conductive element, a second conductive element, a liquid inlet pipe, a liquid outlet pipe and a connecting pipe; the first liquid cooling unit is connected with the first conductive element, and the second liquid cooling unit is connected with the second conductive element; the liquid inlet pipe is communicated with an inlet of the first liquid cooling unit, one end of the connecting pipe is communicated with an outlet of the first liquid cooling unit, the other end of the connecting pipe is communicated with an inlet of the second liquid cooling unit, and the liquid outlet pipe is communicated with an outlet of the second liquid cooling unit. The two independent liquid cooling units are communicated through the connecting pipe, the two liquid cooling units are connected in series, the number of pipelines is reduced, the assembly complexity is reduced, the two conductive elements are cooled at the same time, the problem of low cooling efficiency is solved, and the charging power is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of cooling of conductive elements, and particularly to a liquid cooling system and a charging gun. Background Art

[0002] In the prior art, the liquid cooling system of a charging gun is as shown in Chinese Patent 202121608179.0, which discloses a charging gun and specifically discloses that the cooling method for positive and negative terminals is to cool a pair of positive and negative terminals through a single liquid cooling unit, with low cooling efficiency and complex assembly.

[0003] In view of the above prior art, German Patent DE102016204895B4 discloses a charging connector for coupling with a corresponding connection device and transmitting electric energy. In order to improve the cooling efficiency of positive and negative terminals, it uses two cooling units to separately cool the positive terminal and the negative terminal. However, the water pipes of the liquid cooling system in this patent are two inlets and two outlets, so a total of four water pipes are required. Since the liquid cooling system is installed in the charging gun plug, setting more water pipes will cause the outer diameter of the insulating layer covering the water pipes and cables to increase, and finally cause the volume of the entire charging gun plug to increase, affecting the user experience.

[0004] Therefore, it is necessary to improve the prior art to solve the deficiencies of the prior art. Summary of the Utility Model

[0005] In view of the above problems, the embodiments of the present application provide a liquid cooling system and a charging gun to solve the problems of poor heat dissipation efficiency, complex assembly, large volume, high cost, etc. of conductive elements in the related art.

[0006] In order to achieve the above object, the embodiments of the present application provide the following technical solutions:

[0007] The embodiments of the present application provide a liquid cooling system, including: a first liquid cooling unit, a second liquid cooling unit, a first conductive element, a second conductive element, an inlet pipe, an outlet pipe, and a connecting pipe. The first liquid cooling unit is connected to the first conductive element, and the second liquid cooling unit is connected to the second conductive element;

[0008] The inlet pipe is communicated with the inlet of the first liquid cooling unit. One end of the connecting pipe is communicated with the outlet of the first liquid cooling unit, the other end of the connecting pipe is communicated with the inlet of the second liquid cooling unit, and the outlet pipe is communicated with the outlet of the second liquid cooling unit.

[0009] In an achievable embodiment, the first liquid cooling unit and the second liquid cooling unit are arranged at intervals along a first direction. The first liquid cooling unit includes a first side surface, and the second liquid cooling unit includes a second side surface. The first side surface and the second side surface are parallel and both located on the first direction axis. The inlet and outlet of the first liquid cooling unit are both arranged on the first side surface, and the inlet and outlet of the second liquid cooling unit are both arranged on the second side surface.

[0010] In an achievable embodiment, the first liquid cooling unit and the second liquid cooling unit are arranged at intervals along a first direction. The first liquid cooling unit includes an intersecting first side surface and a third side surface, and the second liquid cooling unit includes an intersecting second side surface and a fourth side surface. The first side surface and the second side surface are both located on the first direction axis. The third side surface and the fourth side surface are opposite to each other, and the planes where the third side surface and the fourth side surface are located are both parallel to the second direction axis;

[0011] The inlet and outlet of the first liquid cooling unit are respectively arranged on the first side surface and the third side surface, and the inlet and outlet of the second liquid cooling unit are respectively arranged on the fourth side surface and the second side surface.

[0012] In an achievable embodiment, the liquid inlet pipe, the liquid outlet pipe and the connecting pipe are all flexible pipes.

[0013] In an achievable embodiment, a first water pipe connector is installed at the inlet of the first liquid cooling unit, and a second water pipe connector is installed at the outlet of the first liquid cooling unit;

[0014] The liquid inlet pipe is sleeved on the first water pipe connector and is internally connected and communicated with the first water pipe connector. One end of the connecting pipe is sleeved on the second water pipe connector and is internally connected and communicated with the second water pipe connector;

[0015] A third water pipe connector is installed at the inlet of the second liquid cooling unit, and a fourth water pipe connector is installed at the outlet of the second liquid cooling unit. The other end of the connecting pipe is sleeved on the third water pipe connector and is internally connected and communicated with the third water pipe connector. The liquid outlet pipe is sleeved on the fourth water pipe connector and is internally connected and communicated with the fourth water pipe connector.

[0016] In an achievable embodiment, the extending direction of the first water pipe connector is perpendicular to the first side surface. The extending direction of the second water pipe connector extends in the direction towards the connecting pipe after being perpendicular to the first side surface. The extending direction of the third water pipe connector extends in the direction towards the connecting pipe after being perpendicular to the second side surface. The extending direction of the fourth water pipe connector is perpendicular to the second side surface.

[0017] In an achievable embodiment, the extending directions of the first water pipe connector and the second water pipe connector are both perpendicular to the first side surface, and the extending directions of the third water pipe connector and the fourth water pipe connector are both perpendicular to the second side surface.

[0018] In an achievable embodiment, the first water pipe connector is installed on the first side surface, and the extending direction of the first water pipe connector is perpendicular to the first side surface;

[0019] The second water pipe connector is installed on the third side surface, and the extending direction of the second water pipe connector is perpendicular to the third side surface;

[0020] The third water pipe connector is installed on the fourth side surface, and the extending direction of the third water pipe connector is perpendicular to the fourth side surface;

[0021] The fourth water pipe connector is installed on the second side surface, and the extending direction of the fourth water pipe connector is perpendicular to the second side surface.

[0022] In an achievable embodiment, the liquid cooling system further includes: a first threaded connector and a second threaded connector. A first threaded hole is provided on the first liquid cooling unit, a second threaded hole is provided on the first conductive element, and the first threaded connector is connected to both the first threaded hole and the second threaded hole;

[0023] A third threaded hole is provided on the second liquid cooling unit, a fourth threaded hole is provided on the second conductive element, and the second threaded connector is connected to both the third threaded hole and the fourth threaded hole.

[0024] In an achievable embodiment, the first conductive element includes a copper busbar and a conductive terminal. The copper busbar is attached to and connected to one of the outer surfaces of the first liquid cooling unit. One end of the conductive terminal is connected to the end of the copper busbar, and the other end of the conductive terminal extends along a direction away from the copper busbar.

[0025] To achieve the above object, the embodiments of the present application further provide the following technical solutions:

[0026] A charging gun includes the aforementioned liquid cooling system.

[0027] The liquid cooling system provided by the embodiments of the present application has the following beneficial effects:

[0028] 1. The liquid cooling system uses two liquid cooling units to separately cool two conductive elements, solving the problem of low cooling efficiency of the conductive elements.

[0029] 2. Connect two independent liquid cooling units in series using a connecting pipe, effectively reducing the number of water pipes, thereby reducing the outer diameter of the insulation layer covering the water pipes and cables, and finally reducing the volume of the entire charging gun plug, reducing costs, and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 Schematic perspective view of the liquid cooling system provided by the embodiment of the present application;

[0032] Figure 2 Exploded view of the structure of the liquid cooling system provided by the embodiment of the present application;

[0033] Figure 3 Structural diagram of the charging gun provided by the embodiment of the present application.

[0034] Reference numerals:

[0035] 100: First liquid cooling unit;

[0036] 101: First side; 102: First water pipe connector; 103: Second water pipe connector; 105: First threaded hole;

[0037] 200: Second liquid cooling unit;

[0038] 201: Second side; 202: Third water pipe connector; 203: Fourth water pipe connector; 205: Third threaded hole;

[0039] 300: First conductive element;

[0040] 301: Second threaded hole;

[0041] 400: Second conductive element;

[0042] 401: Fourth threaded hole;

[0043] 500: Liquid inlet pipe;

[0044] 600: Liquid outlet pipe:

[0045] 700: Connecting pipe;

[0046] 801: First threaded connector; 802: Second threaded connector;

[0047] 901: First cable; 902: Second cable. Detailed implementation manners

[0048] In order to make the above objects, features, and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0049] The embodiments of the present application provide a liquid cooling system. Refer to Figure 1 and Figure 2 , Figure 1 which is a schematic perspective view of the liquid cooling system provided by the embodiments of the present application, Figure 2 and

[0050] which is an exploded view of the structure of the liquid cooling system provided by the embodiments of the present application. The liquid cooling system includes: a first liquid cooling unit 100, a second liquid cooling unit 200, a first conductive element 300, and a second conductive element 400. The first liquid cooling unit 100 is connected to the first conductive element 300. The first liquid cooling unit 100 includes an inlet and an outlet. The coolant flows into the first liquid cooling unit 100 from the inlet, cools the first conductive element 300, and then flows out of the first liquid cooling unit 100 from the outlet. The second liquid cooling unit 200 is connected to the second conductive element 400. The second liquid cooling unit 200 includes an inlet and an outlet. The coolant flows into the second liquid cooling unit 200 from the inlet, cools the second conductive element 400, and then flows out of the second liquid cooling unit 200 from the outlet.

[0051] The liquid cooling system further includes: an inlet pipe 500, an outlet pipe 600, and a connecting pipe 700. The inlet pipe 500 is communicated with the inlet of the first liquid cooling unit 100. One end of the connecting pipe 700 is communicated with the outlet of the first liquid cooling unit 100, and the other end of the connecting pipe 700 is communicated with the inlet of the second liquid cooling unit 200. The outlet pipe 600 is communicated with the outlet of the second liquid cooling unit 200.

[0052] The liquid cooling system according to the embodiment of the present application includes: a first liquid cooling unit 100, a second liquid cooling unit 200, a first conductive element 300, a second conductive element 400, a liquid inlet pipe 500, a liquid outlet pipe 600, and a connecting pipe 700. The first liquid cooling unit 100 is connected to the first conductive element 300, and the second liquid cooling unit 200 is connected to the second conductive element 400; the liquid inlet pipe 500 is communicated with the inlet of the first liquid cooling unit 100, one end of the connecting pipe 700 is communicated with the outlet of the first liquid cooling unit 100, the other end of the connecting pipe 700 is communicated with the inlet of the second liquid cooling unit 200, and the liquid outlet pipe 600 is communicated with the outlet of the second liquid cooling unit 200. By connecting the two independent liquid cooling units through the connecting pipe 700, connecting the liquid inlet pipe 500 to the first liquid cooling unit 100, and connecting the liquid outlet pipe 600 to the second liquid cooling unit 200, the series connection of the two liquid cooling units is realized, effectively reducing the number of pipelines and the assembly complexity; at the same time, enabling the liquid cooling system to cool the first conductive element 300 and the second conductive element 400 simultaneously, solving the problem of low cooling efficiency of the conductive element and greatly improving the charging power.

[0053] In the embodiment of the present application, the first conductive element 300 includes a copper busbar 301 and a conductive terminal 302. The copper busbar 301 is attached to and connected to one of the outer surfaces of the first liquid cooling unit 100, one end of the conductive terminal 302 is connected to the end of the copper busbar 301, and the other end of the conductive terminal 302 extends away from the copper busbar 301 in the second direction (the Y direction shown in the figure, the first direction is perpendicular to the second direction).

[0054] The liquid inlet pipe 500, the liquid outlet pipe 600, and the connecting pipe 700 are all flexible pipes. By connecting the first liquid cooling unit 100 and the second liquid cooling unit 200 with flexible pipes, hard connection is avoided, which can reduce the assembly size deviation and eliminate the stress effect of one terminal on the other liquid cooling unit or terminal after being stressed.

[0055] In the first embodiment of the present application, the first liquid cooling unit 100 and the second liquid cooling unit 200 are arranged at intervals in the first direction ( Figure 1 the X direction shown in the figure). The first liquid cooling unit 100 includes a first side surface 101, and the second liquid cooling unit 200 includes a second side surface 201. The first side surface 101 and the second side surface 201 are parallel and both located on the first direction axis ( Figure 2 the X direction axis shown in the figure); the inlet and the outlet of the first liquid cooling unit 100 are both arranged on the first side surface 101, and the inlet and the outlet of the second liquid cooling unit 200 are both arranged on the second side surface 201. That is to say, the inlet of the first liquid cooling unit 100, the outlet of the first liquid cooling unit 100, the inlet of the second liquid cooling unit 200, and the outlet of the second liquid cooling unit 200 are all located on the same side.

[0056] A first water pipe connector 102 is installed at the inlet of the first liquid cooling unit 100, a second water pipe connector 103 is installed at the outlet of the first liquid cooling unit 100, a third water pipe connector 202 is installed at the inlet of the second liquid cooling unit 200, and a fourth water pipe connector 203 is installed at the outlet of the second liquid cooling unit 200.

[0057] In the first embodiment, in the first case: the extending direction of the first water pipe connector 102 is perpendicular to the first side surface 101, the extending direction of the second water pipe connector 103 is perpendicular to the first side surface 101 and then extends in the direction towards the connecting pipe 700, the extending direction of the third water pipe connector 202 is perpendicular to the second side surface 201 and then extends in the direction towards the connecting pipe 700, and the extending direction of the fourth water pipe connector 203 is perpendicular to the second side surface 201. The liquid inlet pipe 500 is sleeved on the first water pipe connector 102 and is internally communicated with the first water pipe connector 102; one end of the connecting pipe 700 is sleeved on the second water pipe connector 103 and is internally communicated with the second water pipe connector 103; the other end of the connecting pipe 700 is sleeved on the third water pipe connector 202 and is internally communicated with the third water pipe connector, and the liquid outlet pipe 600 is sleeved on the fourth water pipe connector and is internally communicated with the fourth water pipe connector.

[0058] In the first embodiment, in the second case: the extending directions of both the first water pipe connector 102 and the second water pipe connector 103 are perpendicular to the first side surface 101, and the extending directions of both the third water pipe connector 202 and the fourth water pipe connector 203 are perpendicular to the second side surface 201. The difference between the second case and the first case is that: at this time, the connecting pipe 700 is in a U shape, one end of the connecting pipe 700 is sleeved on the second water pipe connector 103, and the other end of the connecting pipe 700 is sleeved on the third water pipe connector 202.

[0059] In the second embodiment of the present application, the first liquid cooling unit 100 and the second liquid cooling unit 200 are arranged at intervals along the first direction ( Figure 1 the X direction shown in Figure 2 ), the first liquid cooling unit 100 includes an intersecting first side surface 101 and a third side surface ( Figure 2 not shown in Figure 2 ), the second liquid cooling unit 200 includes an intersecting second side surface 201 and a fourth side surface ( Figure 2 not shown in Figure 2 ), both the first side surface 101 and the second side surface 201 are located on the first direction axis ( Figure 2 the X direction axis shown in

[0060] The inlet of the first liquid cooling unit 100 is arranged on the first side surface 101, and the outlet of the first liquid cooling unit 100 is arranged on the third side surface. That is to say, the outlet of the first liquid cooling unit 100 is located at Figure 2 the bottom of the first liquid cooling unit 100 in Figure 2 ; the inlet of the second liquid cooling unit 200 is arranged on the fourth side surface, and the outlet of the second liquid cooling unit is arranged on the second side surface 201. That is to say, the inlet of the second liquid cooling unit 200 is located at Figure 2 the top of the second liquid cooling unit 200 in Figure 2 , opposite to the outlet of the first liquid cooling unit 100.

[0061] The first water pipe connector 102 is installed at the inlet of the first liquid cooling unit 100, and the extending direction of the first water pipe connector 102 is perpendicular to the first side surface 101; the second water pipe connector 103 is installed at the outlet of the first liquid cooling unit 100, and the extending direction of the second water pipe connector 103 is perpendicular to the third side surface. The third water pipe connector 202 is installed at the inlet of the second liquid cooling unit 200, and the extending direction of the third water pipe connector is perpendicular to the fourth side surface; the fourth water pipe connector 203 is installed at the outlet of the second liquid cooling unit 200, and the extending direction of the fourth water pipe connector 203 is perpendicular to the second side surface 201. The liquid inlet pipe 500 is sleeved on the first water pipe connector 102 and is internally connected to the first water pipe connector 102; one end of the connecting pipe 700 is sleeved on the second water pipe connector 103 and is internally connected to the second water pipe connector 103; the other end of the connecting pipe 700 is sleeved on the third water pipe connector 202 and is internally connected to the third water pipe connector, and the liquid outlet pipe 600 is sleeved on the fourth water pipe connector and is internally connected to the fourth water pipe connector.

[0062] Continue to refer to Figure 2 , in the embodiment of the present application, the liquid cooling system further includes: a first threaded connector 801 and a second threaded connector 802. A first threaded hole 105 is provided on the first liquid cooling unit 100, and the first threaded connector 801 is configured to be connected to both the first threaded hole 105 and a second threaded hole 301 provided on the first conductive element 300; a third threaded hole 205 is provided on the second liquid cooling unit 200, and the second threaded connector 802 is configured to be connected to both the third threaded hole 205 and a fourth threaded hole 401 provided on the second conductive element 400. So that the first liquid cooling unit 100 and the first conductive element 300 are stably connected, and the second liquid cooling unit 200 and the second conductive element 400 are stably connected, ensuring the normal operation of the liquid cooling system.

[0063] The embodiment of the present application also provides a charging gun terminal, which includes the liquid cooling system described above.

[0064] Meanwhile, the liquid cooling system further includes a first conductive element 300, a second conductive element 400, a first cable 901, and a second cable 902. The first liquid cooling unit 100 of the liquid cooling system is connected to the first conductive element 300, the second liquid cooling unit 200 is connected to the second conductive element 400, the first cable 901 is connected to the first conductive element 300, and the second cable 902 is connected to the second conductive element 400.

[0065] Reference Figure 1 and Figure 2 , the first liquid cooling unit 100 is connected to the front side of the first conductive element 300, and the first cable 901 is connected to the back side of the first conductive element 300; similarly, the second liquid cooling unit 200 is connected to the front side of the second conductive element 400, and the second cable 902 is connected to the back side of the second conductive element 400.

[0066] In summary, the embodiment of the present application provides a liquid cooling system and a charging gun terminal. The liquid cooling system includes: a first liquid cooling unit 100, a second liquid cooling unit 200, a liquid inlet pipe 500, a liquid outlet pipe 600, and a connecting pipe 700. The first liquid cooling unit 100 is configured to be connected to the first conductive element 300, and the second liquid cooling unit 200 is configured to be connected to the second conductive element 400; the liquid inlet pipe 500 communicates with the inlet of the first liquid cooling unit 100, one end of the connecting pipe 700 communicates with the outlet of the first liquid cooling unit 100, the other end of the connecting pipe 700 communicates with the inlet of the second liquid cooling unit 200, and the liquid outlet pipe 600 communicates with the outlet of the second liquid cooling unit 200. By connecting the two independent liquid cooling units through the connecting pipe 700, connecting the liquid inlet pipe 500 to the first liquid cooling unit 100, and connecting the liquid outlet pipe 600 to the second liquid cooling unit 200, the series connection of the two liquid cooling units is realized, effectively reducing the number of pipelines and being easy to produce and assemble. At the same time, the liquid cooling system can cool the first conductive element 300 and the second conductive element 400 simultaneously, solving the problem of low cooling efficiency of the charging gun terminal and greatly improving the charging power.

[0067] In the present specification, the embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0068] It should be noted that the phrases such as "an embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily each embodiment includes such specific features, structures, or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining specific features, structures, or characteristics with an embodiment, it is within the knowledge scope of those skilled in the art to implement such features, structures, or characteristics in combination with other embodiments, whether explicitly or implicitly described.

[0069] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part depending on the context, the term "one or more" as used herein can be used to describe any feature, structure, or property in the sense of a singular meaning, or can be used to describe a combination of features, structures, or properties in the sense of a plural meaning. Similarly, at least in part depending on the context, terms such as "a" or "the" can also be understood to convey a singular usage or a plural usage.

[0070] It should be readily understood that the terms "on", "above", and "over" in this disclosure should be interpreted in the broadest manner such that "on" not only means "directly on something", but also includes the meaning of "on something" with intermediate features or layers therebetween, and "above" or "over" not only includes the meaning of "above" or "over something", but can also include the meaning of "above" or "over something" with no intermediate features or layers therebetween (i.e., directly on something).

[0071] In addition, spatial relative terms such as "below", "beneath", "under", "above", "over", etc. may be used herein for ease of description to describe the relationship of one element or feature to another element or feature as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use or operation other than the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatial relative descriptive terms used herein may be interpreted accordingly.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling system, characterized in that: include: A first liquid cooling unit, a second liquid cooling unit, a first conductive element, a second conductive element, a liquid inlet pipe, a liquid outlet pipe and a connecting pipe, wherein the first liquid cooling unit is connected to the first conductive element, and the second liquid cooling unit is connected to the second conductive element; The liquid inlet pipe is connected to the inlet of the first liquid cooling unit, one end of the connecting pipe is connected to the outlet of the first liquid cooling unit, the other end of the connecting pipe is connected to the inlet of the second liquid cooling unit, and the liquid outlet pipe is connected to the outlet of the second liquid cooling unit.

2. The liquid cooling system according to claim 1, characterized in that: The first liquid cooling unit and the second liquid cooling unit are arranged at intervals along the first direction, the first liquid cooling unit includes a first side surface and a third side surface that intersect, the second liquid cooling unit includes a second side surface and a fourth side surface that intersect, the first side surface and the second side surface are parallel and both are located on the first direction axis, the third side surface and the fourth side surface are opposite, and the plane where the third side surface and the plane where the fourth side surface are located are both parallel to the second direction axis; The inlet and the outlet of the first liquid cooling unit are both arranged on the first side surface, and the inlet and the outlet of the second liquid cooling unit are both arranged on the second side surface.

3. The liquid cooling system according to claim 1, characterized in that: The first liquid cooling unit and the second liquid cooling unit are arranged at intervals along the first direction, the first liquid cooling unit includes a first side surface and a third side surface intersecting each other, the second liquid cooling unit includes a second side surface and a fourth side surface intersecting each other, the first side surface and the second side surface are both located on the first direction axis, the third side surface and the fourth side surface are opposite, and the plane where the third side surface and the plane where the fourth side surface are located are both parallel to the second direction axis; The inlet and the outlet of the first liquid cooling unit are respectively arranged on the first side surface and the third side surface, and the inlet and the outlet of the second liquid cooling unit are respectively arranged on the fourth side surface and the second side surface.

4. The liquid cooling system according to claim 1, characterized in that: The liquid inlet pipe, the liquid outlet pipe and the connecting pipe are all flexible pipes.

5. The liquid cooling system according to claim 2 or 3, characterized in that: A first water pipe connector is installed at the inlet of the first liquid cooling unit, and a second water pipe connector is installed at the outlet of the first liquid cooling unit; The liquid inlet pipe is sleeved on the first water pipe connector and communicated with the interior of the first water pipe connector, and one end of the connecting pipe is sleeved on the second water pipe connector and communicated with the interior of the second water pipe connector; A third water pipe connector is installed at the inlet of the second liquid cooling unit, and a fourth water pipe connector is installed at the outlet of the second liquid cooling unit. The other end of the connecting pipe is sleeved on the third water pipe connector and connected to the inside of the third water pipe connector, and the liquid outlet pipe is sleeved on the fourth water pipe connector and connected to the inside of the fourth water pipe connector.

6. The liquid cooling system according to claim 5, characterized in that: The extension direction of the first water pipe connector is perpendicular to the first side surface, the extension direction of the second water pipe connector is perpendicular to the first side surface and then extends toward the connecting pipe, the extension direction of the third water pipe connector is perpendicular to the second side surface and then extends toward the connecting pipe, and the extension direction of the fourth water pipe connector is perpendicular to the second side surface.

7. The liquid cooling system according to claim 5, characterized in that: The extension direction of the first water pipe connector and the extension direction of the second water pipe connector are both perpendicular to the first side surface, and the extension direction of the third water pipe connector and the extension direction of the fourth water pipe connector are both perpendicular to the second side surface.

8. The liquid cooling system according to claim 5, characterized in that: The first water pipe connector is installed on the first side surface, and the extension direction of the first water pipe connector is perpendicular to the first side surface; The second water pipe connector is installed on the third side surface, and the extension direction of the second water pipe connector is perpendicular to the third side surface; The third water pipe connector is installed on the fourth side surface, and the extension direction of the third water pipe connector is perpendicular to the fourth side surface; The fourth water pipe connector is installed on the second side surface, and an extending direction of the fourth water pipe connector is perpendicular to the second side surface.

9. The liquid cooling system according to claim 1, characterized in that: The liquid cooling system further includes: a first threaded connector and a second threaded connector, the first liquid cooling unit is provided with a first threaded hole, the first conductive element is provided with a second threaded hole, and the first threaded connector is connected to both the first threaded hole and the second threaded hole; A third threaded hole is provided on the second liquid cooling unit, a fourth threaded hole is provided on the second conductive element, and the second threaded connector is connected to both the third threaded hole and the fourth threaded hole.

10. The liquid cooling system according to claim 1, characterized in that: The first conductive element includes a copper bar and a conductive terminal, the copper bar is attached to and connected to one of the outer surfaces of the first liquid cooling unit, one end of the conductive terminal is connected to the end of the copper bar, and the other end of the conductive terminal extends in a direction away from the copper bar.

11. A charging gun, characterized in that: Comprising a liquid cooling system as described in any one of claims 1-10.

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