Rack busbar assembly

Abstract

The utility model discloses a rack busbar assembly, which relates to the technical field of connectors and comprises a shell, a busbar, an insulating part, a heat conducting element, a fixing part and a heat conducting 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 utility model relates to the technical field of connector, especially a rack busbar assembly. BACKGROUND

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

[0003] However, similar busbars will generate a large amount of heat energy due to high current, and if the heat energy cannot be quickly removed, it will cause the failure of the busbar and increase the risk of failure. The existing method is to dissipate heat by using a rack peripheral fan or natural convection, and the heat dissipation efficiency of the foregoing design is low, and it is difficult to meet the heat dissipation requirement as the current increases. SUMMARY

[0004] The main purpose of the utility model is to provide a rack busbar assembly with better heat dissipation efficiency, and an improved design for fixing the busbar is also provided.

[0005] To achieve the above-mentioned purpose, the utility model provides a rack busbar assembly, characterized by comprising: a housing; two busbars located in the housing and extending along a length direction, the two busbars respectively comprising a head part, a shoulder part, a waist part and a base part in sequence along a height direction, and a containing groove being formed between the shoulder part and the base part of the two busbars; an insulating element located between the two busbars for isolating the two busbars; two heat conduction elements respectively embedded in the containing groove of the corresponding busbar; an upper fixing element, one part of which is fixed on the shoulder part of one of the two busbars, and the other part of which is suspended above the containing groove of the same busbar, so as to prevent the heat conduction element group in the containing groove from being separated from the containing groove.

[0006] In an embodiment, the foregoing design can optionally further comprise a lower fixing element, one part of which is fixed on the base part below the corresponding upper fixing element, and the other part of which is located above the containing groove of the same busbar, so as to prevent the heat conduction element group in the containing groove from being separated from the containing groove.

[0007] In an embodiment, any of the foregoing designs can optionally make the upper fixing element be integrally formed and comprise a horizontal part and a vertical part, the horizontal part being embedded in a through hole of the corresponding shoulder part, and the vertical part being connected to the horizontal part and adhering to an outer side surface of the shoulder part and partially located above the containing groove.

[0008] In one embodiment, any of the aforementioned designs can optionally have the side surface of the heat-conductive element in the busbar where the upper fixing member is located provided with a stop groove, and the upper fixing member or the lower fixing member is embedded in the stop groove, so that the upper fixing member or the lower fixing member is used to resist the groove wall of the stop groove of the heat-dissipating element, thereby preventing the heat-conductive element from sliding in the accommodating groove.

[0009] In one embodiment, any of the aforementioned designs can optionally have the shell include at least one lateral opening, and the lateral opening is connected with a baffle plate, the baffle plate is sunken into the lateral opening, and the baffle plate is provided with a through hole, and the sealing plate is locked with the baffle plate through the through hole of the baffle plate.

[0010] In one embodiment, any of the aforementioned designs can optionally have the thickness of the part of the upper fixing member located above the accommodating groove of the same busbar smaller than the thickness connected to the shoulder, so as to reserve space for accommodating the baffle plate and prevent the baffle plate from interfering with the upper fixing member.

[0011] In one embodiment, any of the aforementioned designs can optionally have the outer side surface of the sealing plate flush with the outer side surface of the shell.

[0012] In one embodiment, any of the aforementioned designs can optionally have the thickness of the part of the lower fixing member located above the accommodating groove of the same busbar smaller than the thickness connected to the base, so as to reserve space for accommodating the baffle plate and prevent the baffle plate from interfering with the upper fixing member.

[0013] In one embodiment, any of the aforementioned designs can optionally have the thickness of the part of the lower fixing member located above the accommodating groove of the same busbar smaller than the thickness connected to the base, so as to reserve space for accommodating the baffle plate and prevent the baffle plate from interfering with the upper fixing member.

[0014] In one embodiment, any of the aforementioned designs can optionally have the interior of one of the two heat-conductive elements include a main flow channel, the main flow channel is only communicated with the outside through two inlet and outlet ports of the head end and the tail end of the heat-conductive element, the main flow channel includes at least a plurality of alternately arranged and connected wide section flow channels and narrow section flow channels, and 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 auxiliary flow channel, and the outlet of the auxiliary flow channel is opposite to another fin, so as to slow down the flow rate of the fluid.

[0015] In one embodiment, any of the aforementioned designs can optionally have the two busbars connected with the respective heat-conductive elements through a layer of heat-conductive insulation material, so that the two busbars and the respective heat-conductive elements exchange heat in an electrically insulated manner.

[0016] The rack busbar assembly disclosed by the technical scheme of the utility model is fixed in the accommodating groove in the two busbars by using each fixing member to prevent it from slipping, so that the busbar can be properly fixed in the shell, and the embedded design of the heat conduction element makes it tightly contact with the busbar, which can quickly conduct the heat generated by the busbar in the working process to the heat conduction element and efficiently conduct the heat away from the heat source, so that the heat dissipation efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structures shown in these drawings without creative labor.

[0018] Figure 1 The overall structure schematic diagram of an embodiment of the rack busbar assembly provided by the utility model is shown in the figure.

[0019] Figure 2 The schematic diagram of the relative relationship between the shell and the sealing plate in the utility model is shown in the figure. Figure 1

[0020] Figure 3 The schematic diagram of the shell omitted in the utility model is shown in the figure. Figure 1

[0021] Figure 4 The enlarged view schematic diagram of the head part in the utility model is shown in the figure. Figure 3

[0022] Figure 5 The partial section schematic diagram of the utility model along the A-A section line is shown in the figure. Figure 4

[0023] Figure 6 The partial section schematic diagram of the utility model along the B-B section line is shown in the figure. Figure 4

[0024] Figure 7 The appearance schematic diagram of the heat conduction element in the heat conduction element group in the utility model is shown in the figure. Figure 1

[0025] Figure 8 The schematic diagram of the heat conduction element in the heat conduction element group in the utility model after removing part of the outer surface is shown in the figure. Figure 1 BRIEF DESCRIPTION OF DRAWINGS

[0026]

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

[0028] The realization, functional features and advantages of the utility model will be further described with reference to the drawings in combination with embodiments. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] It should be noted that if the embodiments of the utility model 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 condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0031] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application. If the present application has mentioned "A includes / B includes", unless there is an explicit exclusion or the context does not allow, otherwise the inclusion or inclusion means that A includes one or more B.

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

[0033] The present application provides a rack busbar assembly for simultaneously powering multiple servers. By the following design, the busbar can be stably fixed in the housing, ensuring the proper operation of the device.

[0034] The design of the rack busbar assembly of the present application will be described in an embodiment. See Figure 1 and Figure 3 In this example, the rack busbar assembly A includes many parts, among which the main parts are a housing 10, two busbars 20, 30, an insulating part 40, two grounding strips 50, multiple fixing parts 60, two heat-conducting element groups 70, a heat-conducting insulating material layer 80 and multiple fixing parts such as screws and nuts of different lengths.

[0035] The design of the housing 10 is described below. See Figure 2 The main body 11 of the housing 10 is a metal frame that is bent to be substantially U-shaped. 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 head end and tail end of the main body 11 of the housing 10 are respectively provided with two side surfaces each of which is provided with a side opening 111 extending downward from the upper edge. In this embodiment, the number of the side openings 111 is four. The middle part of each side opening 111 is respectively provided with a semicircular protrusion 111A protruding outward, which is provided with at least one through hole for penetrating elements such as screws. In addition, below the semicircular protrusion 111A, a baffle 111B is provided, which is folded twice at right angles and then sinks inward. The baffle 111B is provided with a through hole for penetrating elements such as screws to fix the sealing plate 12 to the outside of the baffle 111B. The surface of the baffle 111B where the through hole is located is folded twice at right angles and is connected to the side opening 111 of the housing 10 and is substantially parallel to the sealing plate 12.

[0037] In addition, the sealing plate 12 is embedded in each side opening 111, and the shape of the sealing plate 12 matches the shape of each side opening 111 to close the side opening 111. The middle part of the sealing plate 12 is provided with a semicircular waist 121 matching the semicircular protrusion 111A. The upper part of the sealing plate 12 is provided with a lock hole for penetrating elements such as screws to fix the grounding strip 50 to the inside of the main body 11. The lower end of the sealing plate 12 includes a relatively wide tube hole for passing a pipeline. After the sealing plate 12 is embedded in the side opening 111, the inner surface of the sealing plate 12 abuts against the baffle 111B and is fixed to the baffle 111B 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 end and tail end of the main body 11 of the housing 10 are respectively provided with two side surfaces each of which is provided with a side opening 111 extending downward from the upper edge. In this embodiment, the number of the side openings 111 is four. The middle part of each side opening 111 is respectively provided with a semicircular protrusion 111A protruding outward, which is provided with at least one through hole for penetrating elements such as screws. In addition, below the semicircular protrusion 111A, a baffle 111B is provided, which is folded twice at right angles and then sinks inward. The baffle 111B is provided with a through hole for penetrating elements such as screws to fix the sealing plate 12 to the outside of the baffle 111B. The surface of the baffle 111B where the through hole is located is folded twice at right angles and is connected to the side opening 111 of the housing 10 and is substantially parallel to the sealing plate 12.

[0039] The design of the busbar 20 is described below, as shown in Figure 3 、 4 As shown in the figure, the busbar 20 (also referred to as the first busbar) is integrally formed, and the polarity of the busbar 20 is opposite to that of the busbar 30. The busbar 20 sequentially has a head part 21, a shoulder part 22, a waist part 23, and a base part 24 connected to each other along the height direction H. The head part 21, the shoulder part 22, the waist part 23, and the base part 24 each have a rectangular strip shape and an inner side surface of each of them forms an inner common plane to abut against the surface of the insulating member 40. The thickness of the waist part 23 along the width direction W is smaller than the thickness of the shoulder part 22 and the base part 24, so that the shoulder part 22, the waist part 23, and the base part 24 collectively define and form a rectangular accommodating groove 20A extending along the length direction L.

[0040] A plurality of holes, called fixing holes 22A, 24A, are formed in the side surfaces of the shoulder 22 and the base 24, respectively, for the insertion of fixing members 60 or elements such as screws.

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

[0042] The design of the bus bar 30 is described below. The design of the bus bar 30 is substantially the same as that of the bus bar 20 and is mirror-symmetrical.

[0043] The design of the insulating member 40 is described below. As shown in Figure 6 , the insulating member 40 is integrally formed of a high-resistance material and has a substantially uniform cross-sectional shape along the length direction L. The insulating member 40 has a top portion 41, a middle portion 42, and a base portion 43 from top to bottom. The top portion 41 is a hollow tubular member extending along the length direction L and has a pointed roof shape. The lower edge surface of one side of the top portion 41 is higher than that of the other side, so that the bus bars 20, 30 are offset and have a height difference. The middle portion 42 is a vertical plate for separating the bus bars 20, 30 to prevent short circuiting. The left and right sides of the base portion 43 extend to the left and right, respectively, to contact and support the bus bars 20, 30. Similarly, the left side of the base portion 43 is thicker than the right side, so that the bus bars 20, 30 are offset and have a height difference. Figure 4 As shown in , the length of the insulating member 40 along the length direction L is greater than the length of the bus bars 20, 30, and the ends of the insulating member 40 protrude from the bus bars 20, 30.

[0044] Figure 2 The design of the grounding strip 50 is described below. As shown in , the two grounding strips 50 can be made of metal and are fixed to the inner sides of the left and right sides of the main body portion 11 by a plurality of screws that pass through the sealing plate 12 and the main body portion 11.

[0045] Figure 4 The design of the fixing member 60 is described below. As shown in Figure 6 , a plurality of fixing members 60 are fixed to the upper fixing holes 22A of the shoulder 22 and the lower fixing holes 24A of the base 24 of the bus bars 20, 30 by elements such as screws. The fixing members 60 fixed to the shoulder 22 can be called upper fixing members 61, and the fixing members 60 fixed to the base 24 can be called lower fixing members 62, as shown in Figure 5 . The fixing members 60 are integrally formed of an insulating material and can be roughly divided into a horizontal portion 601 and a vertical portion 602. Figure 6The horizontal portion 601 has a hollow tube penetrating through both sides of the busbar 20, allowing elements such as screws to enter and penetrate. The vertical portion 602 is arranged perpendicularly to the horizontal portion 601, and the inner side surface of the vertical portion 602 of each fixing member 60 is smoothly attached to the side surface of the shoulder portion 22 and the base portion 24. Taking the upper fixing member 61 at the upper fixing hole 22A as an example, both the upper and lower sides thereof extend outward along the height direction H and form a cantilever structure to cover at least a portion of the accommodation groove 20A and to block or contact the heat conduction element 71 in the heat conduction element group 70, so as to prevent the heat conduction element 71 from being separated from the accommodation groove 20A in the width direction W. See Figure 5 The upper fixing member 61 also has a portion protruding upward from the shoulder portion 22 in a direction away from the accommodation groove 20A and forms a cantilever structure. In addition, the design of the fixing member 60 at the lower fixing hole 24A is basically the same as the foregoing design, and also has a portion in a cantilever structure to prevent the heat conduction element from being separated from the accommodation groove 20A in the width direction. In the present 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 vertically corresponding, so as to form a gap between the two fixing members 60 to expose a portion of the heat conduction 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 conduction element 71 to prevent the heat conduction element 71 from sliding in the length direction L.

[0046] The design of the outer side surface of the fixing member 60 varies according to its position. Taking the fixing member 60 located at the sealing plate 12 or the lateral opening 111 as an example.

[0047] See Figure 5 The outer side surface 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 the surface to define a guide groove 604 therebetween. The guide groove 604 is gradually narrowed from top to bottom, maintains a width in the middle section, and is gradually widened in the lower section. The hollow tube of the fixing member 60 is located at the middle section. The two protrusions 603 are bounded by the portion suspended in the portion of the rectangular accommodation groove 20A, and form a stepped gap 605 in the lower section. That is, the suspended portion 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 gap 605 can accommodate the baffle 111B folded inward and sunk, so as to avoid interference therebetween. As for the fixing member 60 not located at the lateral opening 111, the upper section thereof is gradually tapered downward and closed in the middle section, and does not have the guide groove 604 and the stepped structure in 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 insulation 40 are provided with hollow pipes penetrating through the two sides, and the hollow pipes of the busbar 20, the busbar 30 and the insulation 40 are aligned. During assembly, a screw is used to penetrate the hollow pipes of the busbar 20, the busbar 30 and the insulation 40, and the two busbars 20, 30 are clamped in the middle by a nut.

[0049] The design of the two heat conducting element groups 70 is described below. See Figure 6 The two heat conducting element groups 70 each include a heat conducting element 71 and two nozzle-shaped connectors 72 at the head and tail ends.

[0050] In this example, the heat conducting element 71 is a liquid cooling plate extending along the length direction L. However, the heat conducting element 71 can also be a heat pipe or a solid high-thermal-conductivity metal block. On the outer side of the heat conducting element 71, there are many shallow grooves, or stop grooves 713, cut by machining. The stop grooves 713 are arranged corresponding to the fixing members 60, which are embedded in the stop grooves 713, so that the groove walls can abut against the side edges of the fixing members 60, thereby preventing the heat conducting element 71 from sliding along the length direction L in the accommodating groove 20A. The stop grooves 713 can be formed by machining, or by pasting blocks of thermal or insulating material on the surface of the heat conducting element 71 to form the stop grooves 713 therebetween, so as to reduce the cost.

[0051] In this example, the heat conducting element 71 has a main flow channel 715 extending along the length direction L. See Figure 8 If the outer side of the heat conducting element 71 is broken, it can be seen that the main flow channel 715 is composed of many wide and narrow flow channels arranged alternately and connected. The main flow channel 715 is connected to the external pipeline only through the inlet and outlet ports 714 at the head and tail ends. Between the inner side and the outer side of the heat conducting element 71, there are many fin groups 711, each of which includes a plurality of fins 712, each of which and another fin 712 or the inner surface of the heat conducting element 71 respectively divide a smaller auxiliary flow channel.

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

[0053] On the surface of the same side of the head and tail ends of the heat conducting element 71, there is a transversely arranged connector 72, one end of which is welded to the inlet and outlet ports 714 of the heat conducting element 71, and the other side is connected to the pipeline by a clasp. During 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 heat-conducting insulation layer 80 is described as follows. See Figure 4 The heat-conducting insulation layer 80 is made of a material with good electrical insulation and heat conduction, such as a heat-conducting silica gel sheet. If necessary, the heat-conducting insulation layer 80 can also be made of a heat-dissipating paste or a combination of multiple layers of materials with different heat-conducting and insulating properties. The heat-conducting insulation layer 80 is arranged between the bus bars 20 and 30 and the respective heat-conducting elements 71, for conducting the heat energy of the bus bars to the surface of the heat-conducting elements 71, and for ensuring that the heat-conducting elements 71 are electrically insulated from the bus bars 20 and 30. In this example, the heat-conducting insulation layer 80 is in the shape of a C and completely covers the three planes outside the slot 20A, for preventing electric leakage.

[0055] In use, the cooling fluid enters the internal main flow channel 715 from one end of the heat-conducting element 71 through the connecting head 72, flows along the length direction L and carries away the heat energy of the bus bar 20, and then exits from the other end of the heat-conducting element 71 through the connecting head to complete the cooling process.

[0056] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application, as described in the present application and the accompanying drawings, is included in the patent protection scope of the present application.

Claims

1. A rack busbar assembly, comprising: The rack busbar assembly comprises: a housing (10); two busbars (20, 30) located in the housing (10) and extending along a length direction, the two busbars (20, 30) respectively comprise a head (21), a shoulder (22), a waist (23) and a base (24) in sequence along a height direction, a receiving groove (20A) is formed between the shoulder (22) and the base (24) of each busbar (20, 30); an insulating member (40) located between the two busbars (20, 30) for isolating the two busbars (20, 30); two heat-conducting elements (71) respectively embedded in the receiving groove (20A) of the corresponding busbar (20, 30); an upper fixing member (61) partially fixed to the shoulder (22) of one of the two busbars (20, 30) and partially located above the receiving groove (20A) of the same busbar (20) for preventing the heat-conducting element group in the receiving groove (20A) from being separated from the receiving groove (20A).

2. The chassis busbar assembly of claim 1, wherein, The upper fixing member (61) is an integral structure comprising a horizontal part (601) and a vertical part (602), the horizontal part (601) is embedded in a through hole (22A) of the corresponding shoulder (22), and the vertical part (602) is connected to the horizontal part (601) and abuts against an outer side surface of the shoulder (22) and partially located above the receiving groove (20A).

3. The chassis busbar assembly of claim 1, wherein, Further comprising a lower fixing member (62) partially fixed to the base (24) below the corresponding upper fixing member (61) and partially located above the receiving groove (20A) of the same busbar (20) for preventing the heat-conducting element group in the receiving groove (20A) from being separated from the receiving groove (20A).

4. The chassis busbar assembly of claim 3, wherein, A stop groove (713) is provided on the side surface of the heat-conducting element (71) in the busbar (20) where the upper fixing member (61) is located, the upper fixing member (61) or the lower fixing member (62) is embedded in the stop groove (713) to resist the groove wall of the stop groove (713) of the heat-conducting element (71) and prevent the heat-conducting element (71) from sliding in the receiving groove (20A).

5. The chassis busbar assembly of claim 1, wherein, The rack busbar assembly further comprises a sealing plate, the housing (10) comprises at least one lateral opening (111), the lateral opening (111) is connected to a baffle (111B) which is sunken into the lateral opening (111), the baffle (111B) is provided with a through hole, a screwing member is embedded in the through hole and locks the sealing plate (12) and the baffle (111B).

6. The chassis busbar assembly of claim 5, wherein, The outer side surface of the sealing plate (12) is flush with the outer side surface of the housing (10).

7. The chassis busbar assembly of claim 5, wherein, The thickness of the portion of the upper fixing member (61) above the receiving groove (20A) of the same busbar (20) is less than the thickness connected to the shoulder (22) to reserve space to prevent the interference between the baffle (111B) and the upper fixing member (61).

8. The chassis busbar assembly of claim 7, wherein, Further comprising a lower fixing member (62), a portion of the lower fixing member (62) is fixed to the base (24) below the corresponding upper fixing member (61), and another portion of the lower fixing member (62) is above the receiving groove (20A) of the same busbar (20) to prevent the heat-conducting element group in the receiving groove (20A) from being detached from the receiving groove (20A), the thickness of the portion of the lower fixing member (62) above the receiving groove (20A) of the same busbar (20) is less than the thickness connected to the base (24) to reserve space for the baffle (111B) to be accommodated, preventing the interference between the baffle (111B) and the lower fixing member (62).

9. The chassis busbar assembly of claim 1, wherein, The interior of one of the heat-conducting elements (71) comprises a main flow channel, which is only communicated with the exterior through the inlet and outlet ports (72) of the head and tail ends of the heat-conducting element (71) respectively, the main flow channel comprises at least a plurality of alternately arranged and connected wide flow channels and narrow flow channels, the main flow channel comprises a plurality of fin groups (711), each of the fin groups (711) comprises a plurality of fins (712), any two adjacent fins (712) form a pair of flow channels, the outlet of the pair of flow channels is opposite to another fin (712) to slow down the flow rate of the fluid in the main flow channel.

10. The chassis busbar assembly of claim 1, wherein, The two busbars (20, 30) are connected with the respective heat-conducting elements (71) through a layer of heat-conducting and insulating material (80) to make the two busbars (20, 30) and the respective heat-conducting elements (71) exchange heat in the case of electrical insulation.

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