Rack busbar assembly

Abstract

The invention, which relates to the technical field of the connector, discloses a rack busbar assembly comprising a housing, a busbar, an insulating member, a heat conduction element, a fixing member and a heat conduction insulating material layer. The busbar extends along the length direction and is provided with a head part, a shoulder part, a waist part and a base, and an accommodating groove is formed between the shoulder part and the base. The heat conduction element is embedded in the containing groove and is prevented from being separated through the fixing piece. The insulator is used for isolating the busbar, ensuring electrical insulation and realizing heat exchange. The assembly is compact in structure, and can provide efficient heat dissipation and stable power supply for a plurality of servers.

Description

Technical Field

[0001] The invention relates to the technical field of connectors, and in particular to a rack bus assembly. Background Art

[0002] US Patent US20240212887A1 discloses a busbar assembly for powering a server, comprising a housing, two busbars and an intermediate insulating element. The busbar and the intermediate insulating element are fixed in the housing by a fastener passing through the housing, the busbar and the intermediate insulating element.

[0003] However, similar buses will generate a large amount of heat due to high current. If the heat cannot be quickly removed, it may cause the bus to fail, increasing its failure risk. The existing practice is to dissipate heat by installing a fan outside the rack or using natural convection. The heat dissipation efficiency of the above design is low. As the current increases, it is difficult to meet the heat dissipation requirements. Summary of the invention

[0004] The main purpose of the present invention is to provide a rack bus assembly with better heat dissipation performance. In addition, an improved design of fixing the bus is also provided.

[0005] To achieve the above-mentioned purpose, the present invention proposes a rack bus assembly, characterized in that it includes: a shell; two buses, which are located in the shell and extend along a length direction, and the two buses respectively include a head, a shoulder, a waist and a base in sequence along a height direction, and a receiving groove is formed between the shoulders and the base of the two buses respectively; an insulating member, which is located between the two buses and is used to isolate the two buses; two heat-conducting elements, which are respectively embedded in the receiving grooves of the corresponding buses; an upper fixing member, a part of which is fixed to the shoulder of one of the two buses, and the other part is suspended above the receiving groove of the same bus to prevent the heat-conducting element group in the receiving groove from detaching from the receiving groove.

[0006] In one embodiment, the aforementioned design may selectively further include a lower fixing member, a portion of which is fixed to a base portion below the corresponding upper fixing member, and another portion of the lower fixing member is located above the receiving groove of the same bus to prevent the heat conducting element group in the receiving groove from detaching from the receiving groove.

[0007] In one embodiment, any of the aforementioned designs can selectively make the upper fixing member integrally formed and include a horizontal portion and a vertical portion, the horizontal portion is embedded in a through hole of its corresponding shoulder, and the vertical portion is connected to the horizontal portion and fits an outer surface of the shoulder and is partially located above the accommodating groove.

[0008] In one embodiment, any of the aforementioned designs can selectively provide a retaining groove on the side surface of the heat-conducting element in the bus where the upper fixing piece is located, for the upper fixing piece or the lower fixing piece to be embedded therein, so as to utilize the upper fixing piece or the lower fixing piece to support the groove wall of the retaining groove of the heat dissipation element to prevent the heat-conducting element from sliding in the accommodating groove.

[0009] In one embodiment, any of the aforementioned designs can selectively make the shell include at least one lateral opening, the lateral opening is connected to a baffle, the baffle is sunk inwardly into the lateral opening, the baffle is provided with a through hole, and the sealing plate is locked with the baffle by using the through hole of the baffle.

[0010] In one embodiment, any of the above designs can selectively make the thickness of the upper fixing member located above the receiving groove of the same bus bar smaller than the thickness at the shoulder, so as to reserve space for the baffle to be accommodated and prevent interference between the baffle and the upper fixing member.

[0011] In one embodiment, any of the above designs can selectively make the outer surface of the sealing plate flush with the outer surface of the housing.

[0012] In one embodiment, any of the above designs can selectively make the thickness of the lower fixing member located above the receiving groove of the same bus bar smaller than the thickness at the base portion, so as to reserve space for the baffle to be accommodated and prevent interference between the baffle and the upper fixing member.

[0013] In one embodiment, any of the above designs can selectively make the thickness of the lower fixing member located above the receiving groove of the same bus bar smaller than the thickness at the base portion, so as to reserve space for the baffle to be accommodated and prevent interference between the baffle and the upper fixing member.

[0014] In one embodiment, any of the aforementioned designs can selectively make one of the two heat-conducting elements include a main flow channel inside, and the main flow channel is connected to the outside only through two inlet and outlet ports at the head end and the tail end of the heat-conducting element, respectively. The main flow channel includes at least a plurality of wide flow channels and narrow flow channels that are arranged and connected in turn. The main flow channel includes a plurality of fin groups, each fin group includes a plurality of fins, and any two adjacent fins form a smaller secondary flow channel, and the outlet of the secondary flow channel faces the other fin to slow down the flow rate of the fluid.

[0015] In one embodiment, any of the above designs can selectively connect the two busbars to their respective heat-conducting elements via a heat-conducting insulating material layer, so that the two busbars and their respective heat-conducting elements can exchange heat under electrical insulation.

[0016] The rack bus assembly proposed in the technical solution of the present invention uses various fixing parts to fix the heat-conducting element in the receiving grooves in the two buses to prevent it from slipping, thereby ensuring that the bus can be properly fixed in the shell. In addition, the embedded design of the heat-conducting element enables it to be in close contact with the bus, so that the heat generated by the bus during operation can be quickly transferred to the heat-conducting element, and the heat can be efficiently transferred away from the heat source, thereby achieving higher heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the overall structure of an embodiment of a rack bus assembly provided by the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram showing the relative relationship between the housing and the sealing plate;

[0020] Figure 3 for Figure 1 The schematic diagram after omitting the shell;

[0021] Figure 4 for Figure 3 Schematic diagram of an enlarged view of the head in FIG.

[0022] Figure 5 for Figure 4 The schematic diagram of the partial section after cutting along the AA section line;

[0023] Figure 6 for Figure 4 The schematic diagram of the partial section after cutting along the BB section line;

[0024] Figure 7 for Figure 1 A schematic diagram of the appearance of a heat conducting element in the middle heat conducting element group;

[0025] Figure 8 for Figure 1 A schematic diagram of a heat-conducting element in a middle heat-conducting element group after a portion of the outer surface is removed;

[0026] Description of Figure Numbers:

[0027] A, rack bus assembly; L, length direction; H, height direction; W, width direction; 10, housing; 11, main body; 111, lateral opening; 111A, protrusion; 111B, baffle; 12, sealing plate; 121, waist reduction; 112, fixed arm; 13, support plate; 20, bus; 20A, accommodating groove; 21, head; 22, shoulder; 22A, upper fixing hole; 23, waist; 24, base; 24A, lower fixing hole; 30, bus; 40, Insulating member; 41, top; 42, middle portion; 43, base portion; 50, grounding strip; 60, fixing member; 601, horizontal portion; 602, vertical portion; 603, bump; 604, guide groove; 605, notch; 61, upper fixing member; 62, lower fixing member; 70, heat conducting element group; 71, heat conducting element; 711, fin group; 712, fin; 713, retaining groove; 714, liquid inlet and outlet; 715, main flow channel; 72, connector; 80, heat conducting insulating material layer.

[0028] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions of "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" can explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that A and B meet at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. If the present invention mentions "A includes / includes one B", unless it is explicitly excluded or not allowed by the context, the inclusion or inclusion means that A includes one or more Bs.

[0032] It should be noted that the various drawings of the present invention are drawn in true proportion, and the size ratio and relative position of each element should be included as part of the disclosure.

[0033] The present invention provides a rack busbar assembly for supplying power to multiple servers simultaneously. The following design can ensure that the busbar is stably fixed in the housing, ensuring that the device operates properly.

[0034] The design of the rack bus assembly of the present invention will be described below using an embodiment. Figure 1 and Figure 3 In this example, the rack bus assembly A includes many parts, among which the more important parts are a housing 10, two buses 20, 30, an insulating member 40, two grounding strips 50, a plurality of fixing members 60, two heat-conducting element groups 70, a heat-conducting insulating material layer 80 and a plurality of fixing parts, such as screws and nuts of different lengths.

[0035] The design of the housing 10 is described below. Figure 2 The main body 11 of the housing 10 is a metal frame folded into a roughly U-shape. The extension direction of the housing 10 is the length direction L, the width is the width direction W, and the height is the height direction H.

[0036] The two side surfaces of the head end and the tail end of the main body 11 of the shell 10 are respectively provided with a lateral opening 111 extending downward from the upper side edge. In this example, the number of the lateral openings 111 is four. The middle part of each lateral opening 111 is respectively provided with an outwardly convex semicircular protrusion 111A, and the protrusion 111A is provided with at least one through hole for components such as screws to pass through. In addition, a baffle 111B is provided below the semicircular protrusion 111A, which sinks inward after being bent at right angles twice. The baffle 111B has a through hole for components such as screws to pass through to fix the sealing plate 12 to its outside. The surface where the through hole of the baffle 111B is located is connected to the lateral opening 111 of the shell 10 through two right-angle bends and is roughly parallel to the sealing plate 12.

[0037] In addition, the sealing plate 12 is embedded in each lateral opening 111, and the shape of the sealing plate 12 matches each lateral opening 111 to close the lateral opening 111. The middle part of the sealing plate 12 is provided with a semicircular waist 121 that matches the protrusion 111A. The upper part of the sealing plate 12 is provided with a lock hole for components such as screws to pass through, which is used to fix the grounding strip 50 to the inner side of the main body 11. The sealing plate 12 includes a wider pipe hole at the center of the lower end for the pipeline to pass through. After the sealing plate 12 is buried in the lateral opening 111, its inner surface abuts against the baffle 111B and is fixed thereto by screws, and the outer surface of the sealing plate 12 is substantially flush with the outer surface of the main body 11.

[0038] The head and the tail of the main body 11 of the housing 10 are provided with a fixing arm 112 further extending along the length direction, and a support plate 13 is connected to the lower opening between the two fixing arms 112. The fixing arm 112 and the support plate 13 are respectively used to be fixed to the external structure.

[0039] The design of the busbar 20 is described below. Figure 3 , 4 As can be seen from the figure, the busbar 20 (also called the first busbar) is integrally formed, and the polarities of the busbar 20 and the busbar 30 are opposite. The busbar 20 has a head 21, a shoulder 22, a waist 23 and a base 24 that are connected to each other in sequence along the height direction H. The head 21, the shoulder 22, the waist 23 and the base 24 are each in a rectangular strip shape, and an inner surface of each of them forms an inner coplane to abut against the surface of the insulating member 40; the thickness of the waist 23 along the width direction W is less than the thickness of the shoulder 22 and the base 24, so that the shoulder 22, the waist 23, and the base 24 jointly define and form a rectangular receiving groove 20A extending along the length direction L.

[0040] The shoulder 22 and the base 24 are provided with a plurality of through holes penetrating the inner and outer surfaces thereof, respectively, which are called fixing holes 22A and 24A, respectively for inserting fixing members 60 or components such as screws. The fixing holes 22A located at the shoulder 22 can be called upper fixing holes 22A, and the fixing holes 24A located at the base can be called lower fixing holes 24A.

[0041] The head 21 and the shoulder 22 are L-shaped and form a platform, and a grounding bar 50 is suspended and fixed above the platform.

[0042] The design of the busbar 30 is described below. The design of the busbar 30 is substantially the same as that of the busbar 20 and is arranged in a mirror image.

[0043] The design of the insulating member 40 is described below. Figure 6 The insulating member 40 is integrally formed with a high-resistance material and most of it extends uniformly along the length direction L. The so-called uniform means that the shape of each cross section along the length direction L is substantially the same. The insulating member 40 has a top 41, a middle part 42 and a base part 43 from top to bottom. The top 41 is a hollow tube extending along the length direction L, and its cross-sectional shape is a pointed roof shape. The lower edge surface on one side of the top 41 is higher and the other side is lower, so that the two buses 20 and 30 form a misalignment and height difference. The middle part 42 is a vertical plate used to isolate the bus 20 and the bus 30 to prevent the two from short-circuiting. The left and right sides of the base part 43 extend to both sides respectively to contact and support the bus 20 and the bus 30 respectively. Similarly, the left side of the base part 43 is thicker and the right side is thinner, so that the bus 20 and the bus 30 can form a misalignment and height difference. See Figure 4 The length of the insulating member 40 in the length direction L is greater than the length of the busbars 20 and 30 , and the head and tail ends of the insulating member 40 partially protrude from the busbars 20 and 30 .

[0044] The design of the grounding strip 50 is described below. Figure 2 The two grounding strips 50 can be made of metal and fixed to the inner sides of the main body 11 by a plurality of screws penetrating the sealing plate 12 and the main body 11 .

[0045] The design of the fixing member 60 is described below. Figure 4 and Figure 6 In the design, it can be seen that a plurality of fixing members 60 are fixed to the upper fixing holes 22A of the shoulders 22 and the lower fixing holes 24A of the base 24 of the busbars 20 and 30 via screws and other components. The fixing member 60 fixed to the shoulder can be referred to as the upper fixing member 61, and the fixing member 60 fixed to the base 24 can be referred to as the lower fixing member 62. Figure 5 The fixing member 60 is integrally formed of insulating material and can be roughly divided into two parts: a horizontal part 601 and a vertical part 602. Figure 6The horizontal portion 601 has a hollow pipe that passes through the two side surfaces of the bus 20, which can allow components such as screws to enter and penetrate. The vertical portion 602 is arranged perpendicular to the horizontal portion 601, and the inner surface of the vertical portion 602 of each fixing member 60 is flatly attached to the side surfaces of the shoulder 22 and the base 24. Taking the upper fixing member 61 at the upper fixing hole 22A as an example, its upper and lower sides respectively extend outward along the height direction H and present a cantilever structure to cover at least a portion of the accommodating groove 20A and to block or contact the heat-conducting element 71 in the heat-conducting element group 70 to prevent the heat-conducting element 71 from escaping from the accommodating groove 20A in the width direction W. See Figure 5 , the upper fixing member 61 also has a portion of the shoulder 22 protruding upward in a direction away from the accommodating groove 20A and is cantilevered. In addition, the design of the fixing member 60 of the lower fixing hole 24A is substantially the same as the above-mentioned design, and is also partially cantilevered to prevent the heat-conducting element from escaping from the accommodating groove 20A in the width direction. In this example, the positions of the upper fixing hole 22A and the lower fixing hole 24A are the same in the length direction L, so the positions of the corresponding upper fixing member 61 and the lower fixing member 62 are also corresponding to each other up and down, so as to form a gap between the two fixing members 60 to expose part of the heat-conducting element 71. The left and right edges of the vertical portion 602 of each fixing member 60 can abut against the groove wall of the stop groove 713 on the surface of the heat-conducting element 71 to prevent the heat-conducting element 71 from sliding along the length direction L.

[0046] The design of the outer surface of the fixing member 60 may be different depending on the position of the fixing member 60 . The fixing member 60 located at the sealing plate 12 or the side opening 111 and the other fixing members 60 not located at the side opening 111 are used as examples for explanation.

[0047] See Figure 5 The outer surface shape of the fixing member 60 located at the sealing plate 12 or the lateral opening 111 has two protrusions 603 formed on both sides of its surface to define a guide groove 604 between the two. The guide groove 604 gradually narrows from top to bottom, maintains width in the middle section, and gradually widens in the lower section. The hollow pipe of the fixing member 60 is located in the middle section. The two protrusions 603 are bounded by the part suspended in the rectangular accommodating groove 20A, and a stepped notch 605 is formed in the lower section. That is, the thickness of the suspended part of the protrusion 603 is thinner but still thicker than the bottom of the guide groove 604. In this way, the space reserved by the notch 605 can be accommodated by the baffle 111B that sinks after being bent inward to avoid interference between the two. For the fixing member 60 not located at the lateral opening 111, its upper section gradually shrinks downward and closes in the middle section, and does not have the guide groove 604 and the stepped structure of the lower section. That is, the thickness of the suspended portion of the lower section is consistent with the height of the protrusion 603 of the upper section.

[0048] See Figure 5The busbar 30 and the insulating member 40 are both provided with hollow pipes penetrating through the two side surfaces, and the hollow pipes of the busbar 20, the busbar 30 and the insulating member 40 are aligned. During assembly, a screw can be used to penetrate the hollow pipes of the busbar 20, the busbar 30 and the insulating member 40 and connected by nuts to clamp the two busbars 20 and 30 therein.

[0049] The design of the two heat conducting element groups 70 is described below. Figure 6 The two heat-conducting element groups 70 respectively include a heat-conducting element 71 and two nozzle-shaped connecting heads 72 at both ends.

[0050] In this example, the heat-conducting element 71 is a liquid cooling row extending along the length direction L. However, each heat-conducting element 71 may also be a heat-conducting head pipe or a solid high-thermal-conductivity metal block. On the outer plate of the heat-conducting element 71, there are many shallow grooves cut, or stop grooves 713. The stop groove 713 is arranged corresponding to the fixing member 60, and the fixing member 60 will be embedded in the stop groove 713 so that its groove wall can abut against the side edge of the fixing member 60, thereby preventing the heat-conducting element 71 from sliding in the accommodating groove 20A along the length direction L. The stop groove 713 can be formed by the aforementioned cutting, or by pasting a heat-conducting or heat-insulating material block on the surface of the heat-conducting element 71 to form the stop groove 713 between the two to reduce costs.

[0051] In this example, the heat conducting element 71 has a main channel 715 extending along the length direction L. Figure 8 If the outer plate of the heat-conducting element 71 is broken, it can be seen that the main channel 715 is composed of a plurality of wide and narrow channels arranged and connected in turn. The main channel 715 is connected to the external pipeline only through the inlet and outlet ports 714 at the head and tail ends. There are many fin groups 711 formed between the inner and outer plates of the heat-conducting element 71, each fin group 711 includes a plurality of fins 712, and each fin 712 and another fin 712 or the inner surface of the heat-conducting element 71 are respectively divided to form a smaller secondary channel.

[0052] The outlet of each smaller secondary flow channel in the fin group 711 located in the wider flow channel faces the side of the fin 712 in the fin group 711 located in the narrower flow channel, thereby slowing down the flow rate to a certain extent and improving the heat exchange efficiency.

[0053] A transverse connector 72 is provided on the surface of the same side of the head and tail of the heat conducting element 71. One end of the connector 72 is welded to the liquid inlet and outlet 714 of the heat conducting element 71, and the other end is connected to the pipeline through a buckle. When in use, the connector 72 can obtain cooling fluid from the external pipeline and input it into the main flow channel 715 inside the heat conducting element 71.

[0054] The design of the thermally conductive insulating material layer 80 is described below. Figure 4 The thermally conductive insulating material layer 80 is made of a material that is electrically insulating and has good thermal conductivity, such as a thermally conductive silicone sheet. However, when necessary, it can also be made of a heat dissipation paste or a combination of multiple layers of materials with thermal conductivity and insulation properties. The thermally conductive insulating material layer 80 is disposed between the bus bars 20, 30 and their respective thermally conductive elements 71, and is used to conduct the heat energy of the bus bars to the surface of the thermally conductive elements 71, while ensuring that the thermally conductive elements 71 are electrically insulated from the bus bars 20, 30. In this example, the thermally conductive insulating material layer 80 is C-shaped and completely covers the three planes outside the slot 20A to prevent leakage.

[0055] When in use, the cooling fluid enters the internal main channel 715 from one end of the heat-conducting element 71 through the pipeline through the connector 72. The cooling fluid flows along the length direction L and takes away the heat energy of the bus 20, and then leaves from the connector at the other end of the heat-conducting element 71 to complete the cooling process.

[0056] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A rack bus assembly, characterized in that: include: a housing (10); Two busbars (20, 30) are located in the housing (10) and extend along a length direction. The two busbars (20, 30) respectively include a head (21), a shoulder (22), a waist (23) and a base (24) in sequence along a height direction. An accommodation groove (20A) is respectively formed between the shoulder (22) and the base (24) of the two busbars (20, 30); an insulating member (40), located between the two busbars (20, 30) and used for isolating the two busbars (20, 30); Two heat-conducting elements (71) are respectively embedded in the receiving grooves (20A) of the corresponding bus bars (20, 30); An upper fixing member (61) has a portion fixed to the shoulder (22) of one of the two busbars (20, 30) and another portion located above the receiving groove (20A) of the same busbar (20) to prevent the heat conducting element (71) group in the receiving groove (20A) from detaching from the receiving groove (20A).

2. The rack bus assembly according to claim 1, characterized in that: The upper fixing member (61) is an integrally formed structure and comprises a horizontal portion (601) and a vertical portion (602); the horizontal portion (601) is embedded in a through hole (22A) of the corresponding shoulder portion (22); the vertical portion (602) is connected to the horizontal portion (601) and fits an outer surface of the shoulder portion (22) and is partially located above the receiving groove (20A).

3. The rack bus assembly according to claim 1, characterized in that: It further comprises a lower fixing member (62), a part of which is fixed on the base (24) below the corresponding upper fixing member (61), and another part of which is located above the receiving groove (20A) of the same bus (20) to prevent the heat-conducting element group in the receiving groove (20A) from detaching from the receiving groove (20A).

4. The rack bus assembly according to claim 3, characterized in that: A retaining groove (713) is provided on the side surface of the heat-conducting element (71) in the bus (20) where the upper fixing member (61) is located, for the upper fixing member (61) or the lower fixing member (62) to be embedded therein, so that the upper fixing member (61) or the lower fixing member (62) can be used to support the groove wall of the retaining groove (713) of the heat-conducting element (71) to prevent the heat-conducting element (71) from sliding in the accommodating groove (20A).

5. The rack bus assembly according to claim 1, wherein: The rack bus assembly also includes a sealing plate, the housing (10) includes at least one lateral opening (111), the lateral opening (111) is connected to a baffle (111B), the baffle (111B) is sunk inwardly into the lateral opening (111), the baffle (111B) is provided with a through hole, a screw member is passed through the through hole and locks the sealing plate (12) and the baffle (111B).

6. The rack bus assembly according to claim 5, characterized in that: The outer surface of the sealing plate (12) is flush with the outer surface of the outer shell (10).

7. The rack bus assembly according to claim 5, characterized in that: The thickness of the portion of the upper fixing member (61) located above the receiving groove (20A) of the same busbar (20) is smaller than the thickness at the portion connected to the shoulder (22), so as to reserve space to prevent interference between the baffle (111B) and the upper fixing member (61).

8. The rack bus assembly according to claim 7, characterized in that: It further comprises a lower fixing member (62), a part of which is fixed on the base (24) below the corresponding upper fixing member (61), and another part of which is located above the receiving groove (20A) of the same bus (20) to prevent the heat-conducting element group in the receiving groove (20A) from escaping from the receiving groove (20A). The thickness of the part of the lower fixing member (62) located above the receiving groove (20A) of the same bus (20) is smaller than the thickness at the connection to the base (24) to reserve space for the baffle plate (111B) to be accommodated, thereby preventing the baffle plate (111B) from interfering with the lower fixing member (62).

9. The rack bus assembly according to claim 1, wherein: The interior of one of the two heat-conducting elements (71) includes a main flow channel, and the main flow channel is connected to the outside only through two liquid inlet and outlet ports (72) at the head end and the tail end of the heat-conducting element (71), respectively. The main flow channel at least includes a plurality of wide flow channels and narrow flow channels that are arranged in turn and connected. The main flow channel includes a plurality of fin groups (711), and each of the fin groups (711) includes a plurality of fins (712). Any two adjacent fins (712) form a secondary flow channel, and the outlet of the secondary flow channel faces the other fin (712) to slow down the flow rate of the fluid in the main flow channel.

10. The rack bus assembly according to claim 1, wherein: The two busbars (20, 30) are respectively connected to the respective heat-conducting elements (71) via a heat-conducting insulating material layer (80), so that the two busbars (20, 30) and the respective heat-conducting elements (71) can perform heat exchange under electrical insulation.

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