Liquid cooling pipe, busbar assembly and electric connection assembly

Abstract

The utility model discloses a liquid cooling pipe, a busbar assembly and an electric connection assembly. The liquid cooling pipe is suitable for being installed in a groove of a busbar. The liquid cooling pipe is approximately semi-cylindrical and is provided with an arc-shaped peripheral wall and a flat bottom wall, so that the cross section of the liquid cooling pipe is approximately semi-circular. When the liquid cooling pipe is installed in the groove of the busbar, heat of the busbar is transmitted to the cooling liquid in the liquid cooling pipe through the arc-shaped peripheral wall of the liquid cooling pipe so as to cool the busbar. According to the utility model, the liquid cooling pipe can cool the busbar, so that the current-carrying capability of the busbar can be improved under the condition that the size of the cross section of the busbar is not increased. In addition, according to the utility model, the cross section of the liquid cooling pipe is semicircular, so that the cooling efficiency of the liquid cooling pipe can be improved.

Description

Technical Field

[0001] This utility model relates to a liquid cooling pipe, including a busbar assembly of the liquid cooling pipe and an electrical connection assembly including the busbar assembly. Background Technology

[0002] In existing technologies, a horizontal busbar connection assembly is required to electrically connect the busbars in two cabinets. Existing busbar connection assemblies typically include a positive busbar and a negative busbar. The two ends of the positive busbar are electrically connected to the positive busbars in both cabinets, and the two ends of the negative busbar are electrically connected to the negative busbars in both cabinets. To handle currents exceeding 3000A, the cross-sectional area of ​​existing busbars is excessively large, leading to difficulties in assembling and maintaining the busbar connection assembly, and resulting in high costs. Utility Model Content

[0003] The purpose of this utility model is to solve at least one aspect of the aforementioned problems and defects existing in the prior art.

[0004] According to one aspect of the present invention, a liquid cooling pipe is provided. The liquid cooling pipe is adapted to be installed in a groove of a busbar. The liquid cooling pipe is generally semi-cylindrical, having an arc-shaped peripheral wall and a flat bottom wall, such that the cross-section of the liquid cooling pipe is generally semi-circular. When the liquid cooling pipe is installed in the groove of the busbar, the heat of the busbar is transferred through the arc-shaped peripheral wall of the liquid cooling pipe to the coolant inside the liquid cooling pipe, thereby cooling the busbar.

[0005] According to an exemplary embodiment of the present invention, the liquid cooling tube is in the shape of a semi-cylindrical tube or a semi-elliptical tube.

[0006] According to another exemplary embodiment of the present invention, the liquid cooling pipe is a one-piece molded part.

[0007] According to another exemplary embodiment of the present invention, two openings communicating with the inner cavity of the liquid cooling pipe are formed on the flat bottom wall of the liquid cooling pipe, and the two openings are respectively close to both ends of the liquid cooling pipe; when cooling the busbar, the coolant flows in from one of the two openings of the liquid cooling pipe and flows out from the other of the two openings of the liquid cooling pipe.

[0008] According to another exemplary embodiment of the present invention, the liquid cooling pipe has closed ends.

[0009] According to another exemplary embodiment of the present invention, the liquid cooling tube has two open ports, the two ports of which are adapted to be sealed by separately inserted sealing end caps.

[0010] According to another aspect of the present invention, a busbar assembly is provided. The busbar assembly includes: a busbar having a groove extending along its length and having a semi-circular cross-section; and the aforementioned liquid cooling pipe, housed within the groove of the busbar. The arc-shaped peripheral wall of the liquid cooling pipe faces the inner surface of the groove of the busbar, allowing heat from the busbar to be transferred via the arc-shaped peripheral wall to the coolant within the liquid cooling pipe, thereby cooling the busbar.

[0011] According to an exemplary embodiment of the present invention, the busbar includes a flat substrate and a strip-shaped protrusion formed on one side of the flat substrate, and the groove is formed on the strip-shaped protrusion.

[0012] According to another exemplary embodiment of the present invention, the busbar is an integrally molded part.

[0013] According to another exemplary embodiment of the present invention, the liquid cooling pipe is made of a conductive material and an insulating thermally conductive pad is provided between the arc-shaped peripheral wall of the liquid cooling pipe and the inner surface of the groove of the busbar; the insulating thermally conductive pad is used to transfer the heat of the busbar to the liquid cooling pipe and to electrically isolate the busbar from the liquid cooling pipe.

[0014] According to another exemplary embodiment of the present invention, the liquid cooling pipe is made of a conductive material and an insulating and thermally conductive layer is injection molded on the outer surface of the arc-shaped peripheral wall of the liquid cooling pipe or on the inner surface of the groove of the busbar; the insulating and thermally conductive layer is used to transfer the heat of the busbar to the liquid cooling pipe and to electrically isolate the busbar from the liquid cooling pipe.

[0015] According to another exemplary embodiment of the present invention, the liquid cooling pipe is made of a conductive material and an insulating thermally conductive film is attached to the outer surface of the arc-shaped peripheral wall of the liquid cooling pipe or the inner surface of the groove of the busbar; the insulating thermally conductive film is used to transfer the heat of the busbar to the liquid cooling pipe and to electrically isolate the busbar from the liquid cooling pipe.

[0016] According to another exemplary embodiment of the present invention, the liquid cooling pipe is made of insulating material, and the arc-shaped peripheral wall of the liquid cooling pipe is in direct thermal contact with the inner surface of the groove of the busbar or is bonded to the inner surface of the groove of the busbar by thermally conductive adhesive.

[0017] According to another exemplary embodiment of the present invention, the busbar assembly further includes a plurality of pressing devices, which are installed on the busbar for pressing the liquid cooling pipe into the groove of the busbar.

[0018] According to another exemplary embodiment of the present invention, the plurality of pressing devices are arranged in a row along the length direction of the busbar; the pressing device includes: an insulating pressure plate spanning across the liquid cooling pipe; and two screws for fastening the two ends of the insulating pressure plate to the busbar respectively, wherein the insulating pressure plate applies a predetermined pressing force on the flat bottom wall of the liquid cooling pipe.

[0019] According to another aspect of the present invention, an electrical connection assembly is provided. The electrical connection assembly includes: two busbar assemblies; and an insulating isolation plate sandwiched between the busbars of the two busbar assemblies to electrically isolate the busbars of the two busbar assemblies, the busbars having a first side and a second side opposite each other in their thickness direction, the first side of the busbar abutting against the insulating isolation plate, and the liquid cooling pipe located on the second side of the busbar.

[0020] According to an exemplary embodiment of the present invention, the insulating isolation plate has two opposite sides in its thickness direction, and mounting grooves are formed on both sides of the insulating isolation plate, and the busbars of the two busbar assemblies are respectively installed and positioned in the mounting grooves on both sides of the insulating isolation plate.

[0021] According to another exemplary embodiment of the present invention, the electrical connection assembly further includes: an inlet pipe connected to an opening at one end of the liquid cooling pipe of one of the two busbar assemblies; an outlet pipe connected to an opening at one end of the liquid cooling pipe of the other of the two busbar assemblies; and a connecting pipe, the two ends of which are respectively connected to the openings at the other ends of the liquid cooling pipes of the two busbar assemblies, for interconnecting the liquid cooling pipes of the two busbar assemblies.

[0022] According to another exemplary embodiment of the present invention, the electrical connection assembly further includes: two first pipe connectors, each connected to an opening at one end of a liquid-cooled pipe of one of the two busbar assemblies; and two second pipe connectors, each connected to an opening at the other end of a liquid-cooled pipe of one of the two busbar assemblies, wherein the inlet pipe is detachably connected to a first pipe connector of a liquid-cooled pipe of one of the two busbar assemblies, the outlet pipe is detachably connected to a first pipe connector of a liquid-cooled pipe of the other of the two busbar assemblies, and both ends of the connecting pipe are detachably connected to the second pipe connectors of liquid-cooled pipes of the two busbar assemblies.

[0023] According to another exemplary embodiment of the present invention, the two ends of the busbar of one of the two busbar assemblies are respectively electrically connected to two positive busbars, and the two ends of the busbar of the other of the two busbar assemblies are respectively electrically connected to two negative busbars.

[0024] In the foregoing exemplary embodiments of the present invention, the liquid cooling pipe is capable of cooling the busbar, thus the present invention can improve the current carrying capacity of the busbar without increasing the cross-sectional dimensions of the busbar. Furthermore, in the present invention, the cross-section of the liquid cooling pipe is approximately semi-circular, which improves the cooling efficiency of the liquid cooling pipe.

[0025] Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention. Attached Figure Description

[0026] Figure 1 This diagram shows a perspective view of a liquid cooling system according to an exemplary embodiment of the present invention.

[0027] Figure 2 This diagram shows an exploded view of a liquid cooling system according to an exemplary embodiment of the present invention.

[0028] Figure 3 This shows a cross-sectional view of the liquid cooling pipe of a liquid cooling system according to an exemplary embodiment of the present invention;

[0029] Figure 4 This diagram shows an assembly schematic of a busbar and an insulating shield according to an exemplary embodiment of the present invention.

[0030] Figure 5 This shows a cross-sectional view of a busbar and an insulating shield according to an exemplary embodiment of the present invention;

[0031] Figure 6 A perspective view of an electrical connection assembly according to an exemplary embodiment of the present invention is shown;

[0032] Figure 7 Showing a cross-sectional view of an electrical connection assembly according to an exemplary embodiment of the present invention;

[0033] Figure 8 This diagram shows a partially enlarged schematic of an electrical connection assembly according to an exemplary embodiment of the present invention. Detailed Implementation

[0034] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. In this specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of this utility model with reference to the accompanying drawings is intended to explain the overall inventive concept of this utility model and should not be construed as a limitation thereof.

[0035] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0036] According to a general technical concept of this utility model, a liquid cooling pipe is provided. The liquid cooling pipe is adapted to be installed in a groove of a busbar. The liquid cooling pipe is semi-cylindrical, having an arc-shaped peripheral wall and a flat bottom wall, such that the cross-section of the liquid cooling pipe is semi-circular. When the liquid cooling pipe is installed in the groove of the busbar, the heat of the busbar is transferred through the arc-shaped peripheral wall of the liquid cooling pipe to the coolant inside the liquid cooling pipe, thereby cooling the busbar.

[0037] According to another general technical concept of this utility model, a busbar assembly is provided. The busbar assembly includes: a busbar having a groove extending along its length and having a semi-circular cross-section; and the aforementioned liquid cooling pipe, which is housed in the groove of the busbar. The arc-shaped peripheral wall of the liquid cooling pipe faces the inner surface of the groove of the busbar, so that the heat of the busbar can be transferred to the coolant inside the liquid cooling pipe through the arc-shaped peripheral wall of the liquid cooling pipe to cool the busbar.

[0038] According to another general technical concept of this utility model, an electrical connection assembly is provided. The electrical connection assembly includes: two busbar assemblies; and an insulating isolation plate sandwiched between the busbars of the two busbar assemblies to electrically isolate the busbars of the two busbar assemblies, the busbars having a first side and a second side opposite to each other in their thickness direction, the first side of the busbar abutting against the insulating isolation plate, and the liquid cooling pipe located on the second side of the busbar.

[0039] Figure 1 This diagram shows a perspective view of a liquid cooling system according to an exemplary embodiment of the present invention. Figure 2 This diagram shows an exploded view of a liquid cooling system according to an exemplary embodiment of the present invention. Figure 3 This shows a cross-sectional view of the liquid cooling pipe 1 of a liquid cooling system according to an exemplary embodiment of the present invention; Figure 4 This diagram shows an assembly schematic of the busbar 2 and the insulating isolation plate 3 according to an exemplary embodiment of the present invention. Figure 5 This shows a cross-sectional view of the busbar 2 and the insulating isolation plate 3 according to an exemplary embodiment of the present invention; Figure 6 A perspective view of an electrical connection assembly according to an exemplary embodiment of the present invention is shown; Figure 7 Showing a cross-sectional view of an electrical connection assembly according to an exemplary embodiment of the present invention; Figure 8 This diagram shows a partially enlarged schematic of an electrical connection assembly according to an exemplary embodiment of the present invention.

[0040] like Figures 1 to 8 As shown, in an exemplary embodiment of this utility model, a liquid cooling pipe 1 is disclosed. The liquid cooling pipe 1 is adapted to be installed in a groove 20 of a busbar 2. The liquid cooling pipe 1 is generally semi-cylindrical, having an arc-shaped peripheral wall 10a and a flat bottom wall 10b, such that the cross-section of the liquid cooling pipe 1 is semi-circular. When the liquid cooling pipe 1 is installed in the groove 20 of the busbar 2, the heat of the busbar 2 is transferred via the arc-shaped peripheral wall 10a of the liquid cooling pipe 1 to the coolant (not shown) inside the liquid cooling pipe 1 to cool the busbar 2.

[0041] like Figures 1 to 8 As shown in the illustrated embodiment, the liquid cooling pipe 1 is generally semi-cylindrical; for example, the liquid cooling pipe 1 can be semi-cylindrical or semi-elliptical. The arc-shaped peripheral wall 10a of the liquid cooling pipe 1 can increase the heat conduction area, thereby improving the heat dissipation efficiency.

[0042] like Figures 1 to 8 As shown in the illustrated embodiment, the liquid cooling pipe 1 can be a one-piece molded part, for example, it can be a one-piece casting or a one-piece machined part. However, the present invention is not limited to the illustrated embodiment; for example, the liquid cooling pipe 1 can also be a multi-section welded pipe.

[0043] like Figures 1 to 8 As shown in the illustrated embodiment, two openings 11 communicating with the inner cavity of the liquid cooling pipe 1 are formed on the flat bottom wall 10b of the liquid cooling pipe 1. These two openings 11 are respectively located near both ends of the liquid cooling pipe 1. When cooling the busbar 2, coolant flows in from one of the two openings 11 of the liquid cooling pipe 1 and flows out from the other of the two openings 11 of the liquid cooling pipe 1.

[0044] like Figures 1 to 8 As shown in the illustrated embodiment, the liquid cooling tube 1 has two open ports 12. In use, the two ports 12 of the liquid cooling tube 1 are adapted to be sealed by separately inserted sealing caps 13. However, the present invention is not limited to the illustrated embodiment; for example, the liquid cooling tube 1 may have closed ends, thus eliminating the need for sealing caps 13.

[0045] like Figures 1 to 8As shown, in another exemplary embodiment of this utility model, a busbar assembly is also disclosed. The busbar assembly includes a busbar 2 and the aforementioned liquid cooling pipe 1. The busbar 2 has a groove 20 extending along its length. The groove 20 has a semi-circular cross-section. The liquid cooling pipe 1 is accommodated in the groove 20 of the busbar 2. The arc-shaped peripheral wall 10a of the liquid cooling pipe 1 faces the inner surface of the groove 20 of the busbar 2, allowing heat from the busbar 2 to be transferred through the arc-shaped peripheral wall 10a to the coolant within the liquid cooling pipe 1, thereby cooling the busbar 2.

[0046] like Figures 1 to 8 As shown in the illustrated embodiment, the busbar 2 includes a flat substrate 21 and a strip-shaped protrusion 22 formed on one side of the flat substrate 21. The aforementioned groove 20 is formed on the strip-shaped protrusion 22.

[0047] like Figures 1 to 8 As shown in the illustrated embodiment, the busbar 2 can be a one-piece molded part, for example, the busbar 2 can be a one-piece stamped part or a one-piece machined part.

[0048] like Figures 1 to 8 As shown in the illustrated embodiment, the liquid cooling pipe 1 is made of a conductive material, for example, it can be made of aluminum, aluminum alloy, copper, or copper alloy. An insulating thermally conductive pad 5 is disposed between the arcuate peripheral wall 10a of the liquid cooling pipe 1 and the inner surface of the groove 20 of the busbar 2. This insulating thermally conductive pad 5 is pressed between the arcuate peripheral wall 10a of the liquid cooling pipe 1 and the inner surface of the groove 20 of the busbar 2 to transfer heat from the busbar 2 to the liquid cooling pipe 1 and to electrically isolate the busbar 2 from the liquid cooling pipe 1.

[0049] In another exemplary embodiment of this invention, the liquid cooling pipe 1 is made of a conductive material, for example, aluminum, aluminum alloy, copper, or copper alloy. An insulating and thermally conductive layer (not shown) is injection-molded onto the outer surface of the arc-shaped peripheral wall 10a of the liquid cooling pipe 1 or the inner surface of the groove 20 of the busbar 2. This insulating and thermally conductive layer is used to transfer heat from the busbar 2 to the liquid cooling pipe 1 and to electrically isolate the busbar 2 from the liquid cooling pipe 1.

[0050] In another exemplary embodiment of this invention, the liquid cooling pipe 1 is made of a conductive material, for example, aluminum, aluminum alloy, copper, or copper alloy. An insulating thermally conductive film (not shown) is adhered to the outer surface of the arc-shaped peripheral wall 10a of the liquid cooling pipe 1 or the inner surface of the groove 20 of the busbar 2. This insulating thermally conductive film is used to transfer heat from the busbar 2 to the liquid cooling pipe 1 and to electrically isolate the busbar 2 from the liquid cooling pipe 1.

[0051] In another exemplary embodiment of this utility model, the liquid cooling pipe 1 can be made of an insulating material, such as plastic. In this case, the arc-shaped peripheral wall 10a of the liquid cooling pipe 1 can be in direct thermal contact with the inner surface of the groove 20 of the busbar 2, or it can be bonded to the inner surface of the groove 20 of the busbar 2 by thermally conductive adhesive.

[0052] like Figures 1 to 8 As shown in the illustrated embodiment, the busbar assembly further includes a plurality of pressing devices 4. The plurality of pressing devices 4 are mounted on the busbar 2 and are used to press the liquid cooling pipe 1 into the groove 20 of the busbar 2, so that the insulating thermally conductive pad 5 is in reliable thermal contact with the inner surface of the groove 20 of the busbar 2, and so that the insulating thermally conductive pad 5 is in reliable thermal contact with the outer surface of the arc-shaped peripheral wall 10a of the liquid cooling pipe 1.

[0053] like Figures 1 to 8 As shown in the illustrated embodiment, multiple pressing devices 4 are arranged in a row along the length of the busbar 2. Each pressing device 4 includes an insulating pressure plate 40 and two screws 41. The insulating pressure plate 40 spans across the liquid cooling pipe 1. The two screws 41 secure both ends of the insulating pressure plate 40 to the busbar 2. The insulating pressure plate 40 applies a predetermined pressing force to the flat bottom wall 10b of the liquid cooling pipe 1.

[0054] like Figures 1 to 8 As shown, in another exemplary embodiment of this utility model, an electrical connection assembly is also disclosed. The electrical connection assembly includes two busbar assemblies and an insulating isolation plate 3. The insulating isolation plate 3 is clamped between the busbars 2 of the two busbar assemblies to electrically isolate the busbars 2 of the two busbar assemblies. The busbar 2 has a first side and a second side opposite to each other in its thickness direction. The first side of the busbar 2 abuts against the insulating isolation plate 3, and the liquid cooling pipe 1 is located on the second side of the busbar 2.

[0055] like Figures 1 to 8 As shown in the illustrated embodiment, the insulating isolation plate 3 has two opposing sides in its thickness direction, and mounting grooves 30 are formed on each side of the insulating isolation plate 3. The busbars 2 of the two busbar assemblies are respectively installed and positioned in the mounting grooves 30 on both sides of the insulating isolation plate 3. Although not shown, fasteners or fixing structures can also be used to fix the busbars 2 of the two busbar assemblies to the insulating isolation plate 3. For example, elastic buckles can be formed on the edge of the mounting grooves 30 of the insulating isolation plate 3, and the busbars 2 can be fixed to the mounting grooves 30 of the insulating isolation plate 3 using the elastic buckles.

[0056] like Figures 1 to 8As shown in the illustrated embodiment, the electrical connection assembly further includes: an inlet pipe 91, an outlet pipe 92, and a connecting pipe 93. The inlet pipe 91 is connected to an opening 11 at one end of the liquid cooling pipe 1 of one of the two busbar assemblies. The outlet pipe 92 is connected to an opening 11 at one end of the liquid cooling pipe 1 of the other of the two busbar assemblies. The two ends of the connecting pipe 93 are respectively connected to the openings 11 at the other ends of the liquid cooling pipes 1 of the two busbar assemblies, for interconnecting the liquid cooling pipes 1 of the two busbar assemblies.

[0057] like Figures 1 to 8 As shown in the illustrated embodiment, the electrical connection assembly further includes two first pipe connectors 81 and two second pipe connectors 82. The two first pipe connectors 81 are respectively connected to an opening 11 at one end of the liquid cooling pipe 1 of each of the two busbar assemblies. The two second pipe connectors 82 are respectively connected to an opening 11 at the other end of the liquid cooling pipe 1 of each of the two busbar assemblies. An inlet pipe 91 is detachably connected to a first pipe connector 81 of the liquid cooling pipe 1 of one of the two busbar assemblies. An outlet pipe 92 is detachably connected to a first pipe connector 81 of the liquid cooling pipe 1 of the other of the two busbar assemblies. Both ends of a connecting pipe 93 are detachably connected to the second pipe connectors 82 of the liquid cooling pipe 1 of each of the two busbar assemblies.

[0058] like Figures 1 to 8 As shown in the illustrated embodiment, two liquid cooling pipes 1, an inlet pipe 91, an outlet pipe 92, a connecting pipe 93, two first pipe joints 81, and two second pipe joints 82 constitute a liquid cooling system for the electrical connection assembly, which is used to cool the two busbars 2.

[0059] like Figures 1 to 8 As shown in the illustrated embodiment, the two ends of busbar 2 in one of the two busbar assemblies are electrically connected to two positive busbars (not shown), and the two ends of busbar 2 in the other busbar assembly are electrically connected to two negative busbars (not shown). In the illustrated embodiment, when a large current passes through busbar 2, the heat generated by busbar 2 is promptly transferred to the coolant in the liquid cooling pipe 1, thereby effectively preventing the temperature of busbar 2 from rising too high.

[0060] Those skilled in the art will understand that the embodiments described above are exemplary and can be improved upon. The structures described in the various embodiments can be freely combined without causing structural or principle conflicts, and these changes should fall within the protection scope of this utility model.

[0061] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to illustrate preferred embodiments of the present invention and should not be construed as a limitation thereof.

[0062] While some embodiments of the general concept of this utility model have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the general concept of this utility model, the scope of which is defined by the claims and their equivalents.

[0063] It should be noted that the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude multiple elements. Furthermore, any reference numerals in the claims should not be construed as limiting the scope of this invention.

Claims

1. A liquid cooling tube adapted to be mounted into a groove (20) of a busbar (2), characterized in that: the liquid cooling tube (1) is substantially semi-cylindrical in shape, having an arc-shaped peripheral wall (10a) and a flat bottom wall (10b) such that the liquid cooling tube (1) is substantially semicircular in cross-section, when the liquid cooling tube (1) is mounted into the groove (20) of the busbar (2), heat of the busbar (2) is transferred into a cooling liquid in the liquid cooling tube (1) via the arc-shaped peripheral wall (10a) of the liquid cooling tube (1) to cool the busbar (2).

2. The liquid-cooled tube of claim 1, wherein: the liquid cooling tube (1) is semi-cylindrical or semi-elliptical in shape.

3. The liquid-cooled tube of claim 1, wherein: the liquid cooling tube (1) is a one-piece. 4.The liquid cooling tube according to claim 1, characterized in that: two openings (11) are formed on the flat bottom wall (10b) of the liquid cooling tube (1) and communicate with an inner cavity of the liquid cooling tube (1), the two openings (11) are respectively close to two ends of the liquid cooling tube (1); when the busbar (2) is cooled, the cooling liquid flows into one of the two openings (11) of the liquid cooling tube and flows out of the other of the two openings (11) of the liquid cooling tube.

5. The liquid-cooled tube of claim 1, wherein: the liquid cooling tube (1) has closed two ends. 6.The liquid cooling tube according to claim 1, characterized in that: the liquid cooling tube (1) has two open ports (12), the two ports (12) of the liquid cooling tube (1) are adapted to be sealed by respectively inserted sealing end caps (13).

7. A busbar assembly characterized in that, comprising: a busbar (2) formed with a groove (20) extending along a length direction of the busbar (2) and having a semicircular cross-section; and the liquid cooling tube (1) according to any one of claims 1-6 is accommodated in the groove (20) of the busbar (2), the arc-shaped peripheral wall (10a) of the liquid cooling tube (1) faces an inner surface of the groove (20) of the busbar (2) such that heat of the busbar (2) can be transferred into a cooling liquid in the liquid cooling tube (1) via the arc-shaped peripheral wall (10a) of the liquid cooling tube (1) to cool the busbar (2). 8.The busbar assembly according to claim 7, characterized in that: the busbar (2) comprises a flat base plate (21) and a strip-shaped protrusion (22) formed on one side of the flat base plate (21), the groove (20) is formed on the strip-shaped protrusion (22). the busbar (2) is a one-piece.

9. The busbar assembly of claim 8, wherein: 10.The busbar assembly according to claim 7, characterized in that: the liquid cooling tube (1) is made of an electrically conductive material and is provided with an insulating thermal conductive pad (5) between the arc-shaped peripheral wall (10a) of the liquid cooling tube (1) and an inner surface of the groove (20) of the busbar (2); the insulating thermal conductive pad (5) is used to transfer heat of the busbar (2) to the liquid cooling tube (1) and electrically isolate the busbar (2) from the liquid cooling tube (1). 11.The busbar assembly according to claim 7, characterized in that: ​ The liquid cooling pipe (1) is made of conductive material and has an insulating heat-conductive layer injected on the outer surface of the arc-shaped peripheral wall (10a) of the liquid cooling pipe (1) or the inner surface of the groove (20) of the busbar (2). The insulating heat-conductive layer is used to transfer the heat of the busbar (2) to the liquid cooling pipe (1) and electrically isolate the busbar (2) from the liquid cooling pipe (1).

12. The busbar assembly of claim 7, wherein: The liquid cooling pipe (1) is made of conductive material and has an insulating heat-conductive film pasted on the outer surface of the arc-shaped peripheral wall (10a) of the liquid cooling pipe (1) or the inner surface of the groove (20) of the busbar (2). The insulating heat-conductive film is used to transfer the heat of the busbar (2) to the liquid cooling pipe (1) and electrically isolate the busbar (2) from the liquid cooling pipe (1).

13. The busbar assembly of claim 7, wherein: The liquid cooling pipe (1) is made of insulating material, and the arc-shaped peripheral wall (10a) of the liquid cooling pipe (1) is in direct thermal contact with the inner surface of the groove (20) of the busbar (2) or is pasted to the inner surface of the groove (20) of the busbar (2) through heat-conductive glue.

14. The busbar assembly of any of claims 7-13, wherein, Further comprising: A plurality of pressing devices (4) installed on the busbar (2) for pressing the liquid cooling pipe (1) in the groove (20) of the busbar (2).

15. The busbar assembly of claim 14, wherein: The plurality of pressing devices (4) are arranged in a row in the length direction of the busbar (2); The pressing device (4) comprises: An insulating pressing plate (40) spanning over the liquid cooling pipe (1); and Two screws (41) respectively fastening two ends of the insulating pressing plate (40) to the busbar (2), The insulating pressing plate (40) exerts a predetermined pressing force on the flat bottom wall (10b) of the liquid cooling pipe (1).

16. An electrical connection assembly characterised in that Comprising: Two busbar assemblies, which are the busbar assemblies of any one of claims 7-15; And An insulating isolation plate (3) clamped between the busbars (2) of the two busbar assemblies to electrically isolate the busbars (2) of the two busbar assemblies, The busbar (2) has a first side and a second side opposite in the thickness direction thereof, the first side of the busbar (2) abutting against the insulating isolation plate (3), and the liquid cooling pipe (1) being located on the second side of the busbar (2).

17. The electrical connection assembly of claim 16, wherein: The insulating isolation plate (3) has two sides opposite in the thickness direction thereof, and mounting grooves (30) are respectively formed on the two sides of the insulating isolation plate (3), and the busbars (2) of the two busbar assemblies are respectively installed and positioned in the mounting grooves (30) on the two sides of the insulating isolation plate (3).

18. The electrical connection assembly of claim 16, wherein, Further comprising: A liquid inlet pipe (91) connected to the opening (11) at one end of the liquid cooling pipe (1) of one of the two busbar assemblies; A liquid outlet pipe (92) connected to the opening (11) at one end of the liquid cooling pipe (1) of the other of the two busbar assemblies; and A connecting pipe (93) is connected with the openings (11) of the other ends of the liquid cooling pipes (1) of the two busbar assemblies respectively, for interconnecting the liquid cooling pipes (1) of the two busbar assemblies.

19. An electrical connection assembly according to claim 18, characterised in that, Further comprising: Two first pipe joints (81) are connected with the openings (11) of one ends of the liquid cooling pipes (1) of the two busbar assemblies respectively; And Two second pipe joints (82) are connected with the openings (11) of the other ends of the liquid cooling pipes (1) of the two busbar assemblies respectively, The inlet pipe (91) is detachably connected with the first pipe joint (81) of the liquid cooling pipe (1) of one of the two busbar assemblies, the outlet pipe (92) is detachably connected with the first pipe joint (81) of the liquid cooling pipe (1) of the other of the two busbar assemblies, and the two ends of the connecting pipe (93) are detachably connected with the second pipe joints (82) of the liquid cooling pipes (1) of the two busbar assemblies respectively.

20. The electrical connection assembly of claim 16, wherein: the busbars (2) of one of the two busbar assemblies are electrically connected to two positive busbars respectively at two ends thereof, and the busbars (2) of the other of the two busbar assemblies are electrically connected to two negative busbars respectively at two ends thereof.

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