A dense bus duct facilitating overall heat dissipation

Abstract

The application discloses a dense bus duct facilitating overall heat dissipation, and relates to the technical field of bus ducts. The bus duct comprises a bus duct body, which comprises a shell with a hollow cavity formed by splicing multiple profiles; and a compensation assembly, which comprises an inner lining plate arranged between the narrow side of a copper bar and the inner wall of the shell. The side of the inner lining plate facing the copper bar is provided with multiple protrusions in parallel. The length direction of the protrusions is consistent with the length extension direction of the copper bar. The outer edge portions of the protrusions jointly form a fitting surface which is adapted to the wave-shaped contour of the narrow side of the copper bar naturally formed due to the covering of the insulating layer. The wave-shaped fitting surface formed by the protrusions of the inner lining plate eliminates the air gap between the narrow side of the copper bar and the inner wall of the shell, establishes a continuous heat conduction path, greatly reduces the interface thermal resistance, and improves the heat dissipation efficiency. After the second side plate of the connector and the end cover are fixed, the outer surface of the connector is flush with the shell, the step and the flared portion are eliminated, a continuous and smooth heat conduction outer wall is formed, and the heat dissipation bottleneck at the connector is eliminated.

Description

Technical Field

[0001] This invention relates to the field of busbar technology, and more specifically, to a compact busbar that facilitates overall heat dissipation. Background Technology

[0002] Busbar trunking is a type of power transmission equipment used in power distribution trunk lines. It is mainly used in three-phase four-wire or three-phase five-wire AC power distribution systems to distribute a large amount of electrical energy to electrical equipment distributed in various locations. This type of equipment is usually composed of an aluminum alloy or steel shell, copper or aluminum busbar conductors stacked in parallel inside, an insulation layer covering the conductors, and connectors for connecting different sections of the busbar trunking. With the continuous expansion of the scale of modern buildings and industrial facilities and the continuous increase in power transmission capacity, the current carrying capacity and heat generation of busbar trunking are also increasing. How to achieve efficient overall heat dissipation and ensure the long-term safe and stable operation of the equipment within a limited installation space has become a technical problem that urgently needs to be solved in this field.

[0003] Existing high-density busbar trunking has the following shortcomings in heat dissipation design: First, after the copper busbars are stacked and assembled, the outer insulating layer naturally forms an uneven, wavy profile on the narrow side of the copper busbars. This wavy profile makes it difficult to form a tight fit with the flat inner wall of the aluminum alloy shell, resulting in a large number of microscopic air gaps. Air has an extremely low thermal conductivity, far lower than that of aluminum alloy materials. These air gaps severely hinder the conduction path of heat from the copper busbars to the shell, causing heat to accumulate inside the busbar trunking. Second, the connector area of ​​existing busbar trunking usually has a heat dissipation bottleneck. There are often steps or flared structures between the connector shell and the busbar body shell, which disrupts the continuous flatness of the shell surface. Heat cannot be smoothly conducted to the external environment at the connector area, resulting in a higher local temperature rise at the connector.

[0004] To address the aforementioned issues, a compact busbar trunking system that facilitates overall heat dissipation is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, a compact busbar trunking with convenient overall heat dissipation is provided. This technical solution solves the problems mentioned in the background technology.

[0006] To achieve the above objectives, the present invention can be implemented using the following technical solutions: This invention provides a compact busbar trunking system that facilitates overall heat dissipation, comprising: The busbar trunking body includes a shell with a hollow cavity formed by splicing multiple profiles, multiple copper busbars stacked in the shell along the thickness direction, an insulating layer covering the outside of each copper busbar, end caps fixedly installed at both ends of the shell, a window in the middle of the end cap for the end of the copper busbar to extend out, and pressure plates fixedly installed on both sides of the end cap and extending in the direction of extension of the copper busbar. The compensation component includes an inner liner plate disposed between the narrow side of the copper busbar and the inner wall of the housing. The side of the inner liner plate facing the copper busbar has multiple protrusions arranged side by side. The length direction of the protrusions is consistent with the length extension direction of the copper busbar. The outer edges of each protrusion plate together form a fitting surface that matches the wavy contour naturally formed by the insulation layer covering the narrow side of the copper busbar. The outer edges of the protrusions have multiple fine grooves extending along their length direction. The fine grooves divide the protrusions into multiple parallel elastic contact teeth. The side of the inner liner plate facing away from the copper busbar is a flat surface that fits against the inner wall of the housing. The outer edges of the protrusions are coated with a thermally conductive silicone grease layer. The thermally conductive silicone grease layer is used to form a lubrication interface between the elastic contact teeth and the insulation layer and to fill the microscopic gaps between them to form a heat conduction path.

[0007] Furthermore, the end of the elastic contact tooth facing the copper busbar is provided with an arc transition surface, the radius R of which is 0.3mm~1.0mm.

[0008] Furthermore, the width of the fine tooth groove is 0.5mm to 1.5mm, and the groove depth is 1 / 3 to 2 / 3 of the height of the convex strip.

[0009] Furthermore, the housing includes two opposing first side plates and two opposing first cover plates, wherein the inner side of the first side plate is attached to the wide side of the outermost copper busbar, the outer side of the first side plate is provided with a corrugated heat dissipation structure, and the side of the inner liner plate away from the narrow side of the copper busbar is attached to the inner side of the first cover plate.

[0010] Furthermore, it also includes a connector, which includes two connector side plates respectively disposed on the outer sides of the two pressure plates, the two connector side plates pressing against the outer side of the pressure plates, two second side plates respectively disposed on the outer sides of the two connector side plates, and two second cover plates respectively disposed on the upper and lower sides of the second side plates. The two second side plates and the two second cover plates together form a connector housing, the connector housing is sleeved on the outer side of the end of the housing, the two ends of the second side plates are fixedly connected to the side of the end cover, and the outer surface of the second side plates is flush with the outer surface of the housing.

[0011] Furthermore, the connector also includes a double-ended bolt that passes through both connector side plates, a torque nut threaded to both ends of the double-ended bolt for pulling the connector side plates inward, an insulating pad disposed between adjacent copper busbars, and a conductive connecting piece disposed in the middle of each insulating pad. The conductive connecting piece spans between the ends of the copper busbars of two adjacent busbars to achieve electrical conduction.

[0012] Furthermore, the conductive connecting piece has a first through hole in the middle for the double-ended plug to pass through, and the insulating pad has a second through hole in the middle for the double-ended plug to pass through. The diameter of the first through hole is larger than the diameter of the second through hole. When the conductive connecting piece is embedded in the side of the insulating pad, the first through hole will be fitted over the outside of the second through hole. The wall of the second through hole forms an insulating bushing between the first through hole and the double-ended plug, preventing the conductive connecting piece from contacting the double-ended plug, thus electrically isolating the plug body of the double-ended plug from the conductive connecting piece.

[0013] As described above, the features and advantages of the compact busbar trunking system in this invention, which facilitates overall heat dissipation, are as follows: This solution effectively eliminates the microscopic air gap between the narrow side of the copper busbar and the inner wall of the housing by setting multiple protrusions on the side of the inner liner plate facing the copper busbar, and making the outer edges of each protrusion form a fitting surface that matches the wavy profile of the narrow side of the copper busbar. This establishes a continuous solid heat conduction path from the copper busbar through the insulation layer, the thermally conductive silicone grease layer, the inner liner plate to the housing, which greatly reduces the interface thermal resistance and significantly improves the overall heat dissipation efficiency of the busbar trunking.

[0014] By creating multiple fine grooves extending along the length of the convex strip on its outer edge, the convex strip is divided into multiple parallel elastic contact teeth. This allows each elastic contact tooth to independently generate micron-level elastic deformation under assembly pressure, adaptively conforming to the local contour changes caused by processing errors or thermal expansion and contraction on the narrow side of the copper busbar. This solves the technical problem of traditional rigid bonding structures easily losing contact under thermal cycling conditions, ensuring the continuous and stable heat dissipation performance of the busbar throughout its entire life cycle. In addition, by setting a rounded transition surface at the top of the elastic contact teeth, combined with the lubrication of thermally conductive silicone grease, stress concentration effectively avoids scratching and puncturing of the insulation layer, ensuring the long-term reliability of electrical insulation.

[0015] This solution further eliminates the steps and flared structures between the connector and the busbar body by fixing the second side plate of the connector to the side of the end cover and keeping the outer surface of the second side plate flush with the outer surface of the housing. This creates a continuous and flat heat-conducting outer wall, avoiding the accumulation and conduction interruption of heat at the connector and effectively eliminating the heat dissipation bottleneck along the entire length of the busbar. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the dense busbar trunking that facilitates overall heat dissipation, as shown in this invention. Figure 2 This is a schematic diagram of the busbar trunking body structure of the compact busbar trunking that facilitates overall heat dissipation, as shown in this invention. Figure 3 for Figure 2 Schematic diagram of the structural decomposition in the middle; Figure 4This is a schematic diagram of the assembly of the compensation component for the dense busbar trunking that facilitates overall heat dissipation, as shown in this invention. Figure 5 for Figure 4 Enlarged structural diagram at point A; Figure 6 This is a schematic diagram of the compensation component structure for the dense busbar trunking that facilitates overall heat dissipation, as shown in this invention. Figure 7 This is a schematic diagram of the connector assembly for the compact busbar trunking that facilitates overall heat dissipation, as shown in this invention. Figure 8 for Figure 1 Schematic diagram of the structural decomposition in the middle; Figure 9 for Figure 8 Enlarged schematic diagram of the structure at point B.

[0017] The reference numerals in the appendix of this invention are as follows: Busbar trunking body: 11. Shell; 12. Copper busbar; 13. Insulation layer; 14. End cap; 15. Pressure plate; Compensation components: 21. Inner liner; 22. Raised strip; 23. Fine toothed groove; Connector: 31. Second side plate; 32. Second cover plate; 33. Connector side plate; 34. Double-ended bolt; 35. Torque nut; 36. Insulating pad; 37. Conductive connecting piece. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] See Figures 1-9 As shown in the figure, a compact busbar trunking that facilitates overall heat dissipation is provided as an embodiment of the present invention, which will be described in detail below: See Figures 1-3As shown, a compact busbar trunking system for easy overall heat dissipation includes a busbar trunking body, which includes a housing 11. The housing 11 is formed by splicing multiple profiles to create a hollow cavity. As an optional embodiment, the housing 11 can be made of an aluminum-magnesium-manganese ternary alloy profile. This alloy material has a high thermal conductivity and good mechanical strength, and is a non-ferromagnetic material, which can effectively reduce hysteresis eddy current losses and shell heating. Multiple copper busbars 12 are stacked along the thickness direction inside the housing 11. The copper busbars 12 are made of high-purity electrolytic copper as raw material and processed by extrusion, and their conductivity is better than the national standard GB / T. According to the requirements of 5585.1-2018, each copper busbar 12 is covered with an insulating layer 13. The insulating layer 13 can be made of double-layer high-quality polyester film that is entirely covered on the outer surface of the copper busbar 12. The polyester film is certified by the U.S. UL laboratory (UL certification number: E199019) and the insulation class reaches Class B. End caps 14 are fixedly installed at both ends of the housing 11. The end cap 14 has a window in the middle for the end of the copper busbar 12 to extend out. The end of the copper busbar 12 extends out from the window to facilitate the electrical connection between two adjacent busbar sections. Pressure plates 15 are fixedly installed on both sides of the end cap 14 and extend in the direction of extension of the copper busbar 12.

[0020] It should be noted that the housing 11, copper busbar 12, insulation layer 13, end cap 14, pressure plate 15 and other components are all conventional structures in the field of busbar trunking. Their specific shapes, dimensions and connection methods can be referred to the well-known technology in this field, and will not be described in detail here.

[0021] See Figures 3-6 As shown, the busbar trunking also includes a compensation component, which includes an inner liner plate 21. The inner liner plate 21 is disposed between the narrow side of the copper busbar 12 and the inner wall of the housing 11. The inner liner plate 21 has multiple protrusions 22 arranged side by side on the side facing the copper busbar 12. The length direction of the protrusions 22 is consistent with the length extension direction of the copper busbar 12. The outer edges of each protrusion 22 together form a mating surface. The mating surface is adapted to the wavy contour naturally formed on the narrow side of the copper busbar 12 due to the insulation layer 13 covering it. Specifically, after the copper busbar 12 is stacked and assembled, the insulation layer 13 covering its exterior makes the narrow side of the copper busbar 12 form a wavy contour with concave and convex shapes. The wavy structure of the mating surface matches the contour, thereby eliminating the macroscopic air gap between the narrow side of the copper busbar 12 and the inner liner plate 21.

[0022] See Figure 6As shown, the outer edge of the protrusion 22 has multiple fine toothed grooves 23 extending along its length. The fine toothed grooves 23 divide the protrusion 22 into multiple elastic contact teeth arranged side by side. As an optional implementation, the groove width of the fine toothed groove 23 is 0.5mm to 1.5mm, and the groove depth is 1 / 3 to 2 / 3 of the height of the protrusion 22. By setting the fine toothed grooves 23, each elastic contact tooth can independently generate micron-level elastic deformation when subjected to the clamping force of the housing 11, thereby adaptively conforming to the local concave and convex changes of the wavy contour on the narrow side of the copper busbar 12, achieving gapless conformal fitting. The side of the inner liner 21 facing away from the copper busbar 12 is a flat surface, and the flat surface fits against the inner wall of the housing 11.

[0023] The outer edge of the protrusion 22 is coated with a thermally conductive silicone grease layer. The thermally conductive silicone grease layer is used to form a lubrication interface between the elastic contact teeth and the insulating layer 13, and to fill the microscopic gaps between them to form a heat conduction path. Specifically, the thermally conductive silicone grease layer has the following three functions: Firstly, the thermal grease layer fills the microscopic air gap between the elastic contact teeth and the insulating layer 13. Since the thermal conductivity of air is extremely low, while the thermal conductivity of thermal grease can usually reach 2W / (m·K)~5W / (m·K), the filling can significantly reduce the interfacial thermal resistance and establish an efficient solid thermal conduction path. Secondly, the thermally conductive silicone grease layer forms a lubrication interface between the elastic contact teeth and the insulating layer 13. When the busbar expands and contracts due to load changes, a micron-level relative displacement occurs between the elastic contact teeth and the insulating layer 13. The lubrication effect of the thermally conductive silicone grease layer can effectively reduce the frictional resistance between the two and prevent the insulating layer 13 from being repeatedly scratched and damaged. Third, the thermal grease layer is squeezed out or drawn back during the relative movement between the elastic contact teeth and the insulating layer 13. When the temperature decreases and the elastic contact teeth contract and rebound, part of the thermal grease layer is squeezed out of the fine tooth groove 23 to fill the micro gaps caused by the contraction. When the temperature increases and the elastic contact teeth expand and squeeze, the squeezed thermal grease is pressed back between the elastic contact teeth and the insulating layer 13, thereby realizing the dynamic adaptive filling of the cycle and dynamically compensating for the interface gap caused by thermal expansion and contraction. The thermal grease layer can use commercially available thermal grease materials, such as thermal grease with silicone oil as the base oil and alumina or boron nitride as the thermally conductive filler. The specific grade and parameters can be selected according to the actual working conditions, which will not be elaborated here.

[0024] As a preferred embodiment, the end of the elastic contact tooth facing the copper busbar 12 is provided with an arc transition surface (existing technology, not shown in the figure). The radius R of the arc transition surface is 0.3mm~1.0mm. By providing an arc transition surface at the top of the elastic contact tooth, the concentrated stress damage to the insulation layer 13 caused by sharp edges is avoided, and the integrity and electrical safety of the insulation layer 13 are further protected.

[0025] As an optional implementation, the housing 11 includes two opposing first side plates and two opposing first cover plates. The inner side of the first side plate is attached to the wide side of the outermost copper busbar 12, and the outer side of the first side plate is provided with a corrugated heat dissipation structure. The corrugated heat dissipation structure increases the heat dissipation surface area of ​​the housing 11, which is conducive to the dissipation of heat to the external environment. The side of the inner lining plate 21 away from the narrow side of the copper busbar 12 is attached to the inner side of the first cover plate. Both the first side plate and the first cover plate can be extruded from aluminum-magnesium-manganese ternary alloy profiles. The four profiles are connected end to end to form a hollow cavity. Adjacent profiles can be fixed by riveting or bolting.

[0026] It should be noted that the inner lining plate 21 can be directly fixed to the inner side of the first cover plate, for example, by bolt connection, or it can be directly embedded in the gap between the copper busbar 12 and the first cover plate. In this case, since the housing 11 is formed by bolted splicing, the inner lining plate 21 will naturally be firmly restricted in the above-mentioned gap and will not move.

[0027] In addition, the inner liner plate 21 can be customized according to requirements to adjust the gap between the protrusions 22 and adapt to the needs of copper busbars 12 with different thicknesses. At the same time, the inner liner plate 21 can be made into standardized segments. Multiple inner liner plates 21 can be set as needed according to the length of the busbar trunking, making it more flexible to use and easy to replace individual inner liner plates 21.

[0028] Based on this, on the one hand, when multiple inner lining plates 21 are arranged, they naturally have a certain gap, which also adapts to the thermal expansion and contraction of the inner lining plates 21, similar to the installation of railway rails, to avoid deformation of the inner lining plates 21 that could cause the busbar trunking shell 11 to burst from the inside; on the other hand, in the long busbar trunking, multiple inner lining plates 21 are arranged in segments, and the stacking state of the copper busbars 12 at different positions is not the same. By having each inner lining plate 21 deform and fit into each segment of copper busbar 12 respectively, the heat conduction effect is more perfect.

[0029] See Figure 1 and Figures 7-9As shown, the busbar trunking also includes connectors, which are used to electrically and mechanically connect the ends of two adjacent busbar trunking sections. Each connector includes two connector side plates 33, two second side plates 31, and two second cover plates 32. The two connector side plates 33 are respectively disposed on the outer sides of the two pressure plates 15, and the connector side plates 33 press against the outer surfaces of the pressure plates 15. The two second side plates 31 are respectively disposed on the outer sides of the two connector side plates 33, and the two second cover plates 32 are respectively disposed on the upper and lower sides of the second side plates 31. The two second side plates 31 and the two second cover plates 32... Together they form a connector housing, which is fitted onto the outer side of the end of the housing 11. The two ends of the second side plate 31 are fixedly connected to the side of the end cover 14. The outer surface of the second side plate 31 is flush with the outer surface of the housing 11. By fixing the second side plate 31 to the side of the end cover 14 and making the outer surface of the second side plate 31 flush with the outer surface of the housing 11, a continuous and flat outer wall without steps is formed between the connector part and the bus body. This avoids the flared structure of the connector part from hindering air convection and heat dissipation, and eliminates the heat dissipation bottleneck along the entire length of the bus.

[0030] The connector also includes a double-ended bolt 34, a torque nut 35, an insulating pad 36, and a conductive connecting piece 37. The double-ended bolt 34 passes through both connector side plates 33. The torque nut 35 is threaded to both ends of the double-ended bolt 34 and is used to pull the connector side plates 33 inward. As an optional implementation, the double-ended bolt 34 can be a double-ended torque shear bolt with a standard tightening torque of 70±10 N·m. When tightened to the set torque, the bolt head automatically breaks, indicating that the tightening torque has been met, avoiding overtightening or loosening caused by manual operation. The double-ended bolt 34 can also be used in conjunction with a limiting mechanism to ensure quick and reliable connector installation. The insulating pad 36 is located on... Between adjacent copper busbars 12, electrical isolation between phase conductors is achieved. Conductive connecting pieces 37 are disposed in the middle of each insulating pad 36. The conductive connecting pieces 37 span between the ends of the copper busbars 12 of two adjacent busbars to achieve electrical conduction. As an optional implementation, the connector can also have an axial expansion and contraction compensation structure (specifically, the bolt holes are set as elongated ellipses, in which case the busbar can make a certain small displacement relative to the connector). Its compensation range is ±4mm, which is used to absorb the length change of the busbar due to thermal expansion and contraction, and to avoid the connector from loosening or deforming due to thermal stress. The above are known technologies in the art and will not be described in detail here.

[0031] The conductive connecting piece 37 has a first through hole in its center for the double-ended bolt 34 to pass through, and the insulating pad 36 has a second through hole in its center for the double-ended bolt 34 to pass through. The diameter of the first through hole is larger than the diameter of the second through hole. When the conductive connecting piece 37 is embedded in the side of the insulating pad 36, the first through hole is fitted over the second through hole, and the wall of the second through hole forms an insulating bushing between the first through hole and the double-ended bolt 34 (see reference). Figure 9As shown in the figure, a large circle, i.e., the first through hole, is opened in the conductive connecting piece 37. The small circle inside the large circle, which has a certain hole wall thickness, is the second through hole opened on the insulating pad 36. Since the diameter of the first through hole of the conductive connecting piece 37 is larger than the diameter of the double-ended bolt 34, and the diameter of the second through hole of the insulating pad 36 is adapted to the diameter of the double-ended bolt 34, the double-ended bolt 34 fits against the inner wall of the insulating pad 36 when it passes through the second through hole. Moreover, the first through hole is completely isolated by the hole wall of the second through hole, thereby preventing the conductive connecting piece 37 from directly contacting the double-ended bolt 34. This allows the bolt body of the double-ended bolt 34 to form a reliable electrical isolation with the conductive connecting piece 37. This structure does not require the installation of an additional independent insulating sleeve, simplifies the assembly process, reduces the number of parts, and ensures the reliability of electrical isolation, avoiding safety hazards caused by live bolts. The above are well-known technologies in the art and will not be described in detail here.

[0032] Working principle The working principle of this scheme is as follows: Multiple copper busbars 12 are stacked along the thickness direction in the hollow cavity of the housing 11. Each copper busbar 12 is covered with an insulating layer 13. After stacking and assembly, the insulating layer 13 naturally forms a wavy profile with concave and convex surfaces on the narrow side of the copper busbar 12. An inner liner 21 is disposed between the narrow side of the copper busbar 12 and the inner wall of the housing 11. The outer edge of the protrusion 22 on the side of the inner liner 21 facing the copper busbar 12 forms a fitting surface that matches the wavy profile. By opening fine grooves 23, the protrusion 22 is divided into multiple independent elastic contact teeth. When the housing 11 is assembled and pressed, each elastic contact tooth independently generates elastic deformation, adaptively fitting the local concave and convex areas of the wavy profile and coating the protrusion. The thermally conductive grease layer at the outer edge of the 22 further fills the microscopic gap between the elastic contact teeth and the insulating layer 13, establishing a continuous heat conduction path from the copper busbar 12 through the insulating layer 13, the thermally conductive grease layer, the inner liner 21 to the housing 11, further enhancing the overall heat dissipation capability of the busbar trunking. After the copper busbar 12 is energized and heats up, the heat is conducted along this path to the surface of the housing 11 and dissipated to the external environment through the corrugated heat dissipation structure on the outer side of the housing 11. When the busbar trunking expands and contracts due to load changes, the thermally conductive grease layer acts as a lubricant between the elastic contact teeth and the insulating layer 13, and is squeezed out or drawn back during the relative movement of the two, dynamically compensating for the interface gap caused by thermal expansion and contraction, and maintaining the continuous tight fit of the thermal interface.

[0033] At the end of the busbar, the connector side plate 33 presses against the outer side of the pressure plate 15 on both sides of the end cover 14. The connector side plate 33 is pulled inward by the double-ended bolt 34 and the torque nut 35. The clamping force is transmitted through the pressure plate 15 to the end of the copper busbar 12 and the conductive connecting piece 37 to achieve electrical connection. After the second side plate 31 is fixedly connected to the side of the end cover 14, the outer surface of the second side plate 31 and the second cover plate 32 is flush with the outer surface of the housing 11, forming a continuous and flat outer wall without steps, eliminating the heat dissipation bottleneck at the connector. The double-ended bolt 34 passes through the second through hole of the insulating pad 36 and the first through hole of the conductive connecting piece 37. The hole wall of the second through hole isolates the double-ended bolt 34 from the conductive connecting piece 37 to achieve electrical isolation. Each section of the busbar is connected end to end by the connector to form a complete power supply trunk line.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compact busbar trunking system that facilitates overall heat dissipation, characterized in that, include: The busbar trunking body includes a shell (11) with a hollow cavity formed by splicing multiple profiles, multiple copper busbars (12) stacked in the shell (11) along the thickness direction, an insulating layer (13) covering the outside of each copper busbar (12), end caps (14) fixedly installed at both ends of the shell (11), a window in the middle of the end cap (14) for the end of the copper busbar (12) to extend out, and pressure plates (15) fixedly installed on both sides of the end cap (14) and extending in the extension direction of the copper busbar (12). The compensation component includes an inner liner plate (21) disposed between the narrow side of the copper busbar (12) and the inner wall of the housing (11). The inner liner plate (21) has multiple protrusions (22) arranged side-by-side on the side facing the copper busbar (12). The length direction of the protrusions (22) is consistent with the length extension direction of the copper busbar (12). The outer edges of each protrusion (22) together form a fitting surface that adapts to the naturally formed wavy contour of the narrow side of the copper busbar (12) due to the insulation layer (13). The outer edge has multiple fine grooves (23) extending along its length. The fine grooves (23) divide the protrusion (22) into multiple parallel elastic contact teeth. The side of the inner liner (21) facing away from the copper busbar (12) is flat and fits against the inner wall of the housing (11). The outer edge of the protrusion (22) is coated with a thermally conductive silicone grease layer. The thermally conductive silicone grease layer is used to form a lubrication interface between the elastic contact teeth and the insulating layer (13) and fill the micro gap between them to form a heat conduction path.

2. The compact busbar trunking system for easy overall heat dissipation according to claim 1, characterized in that: The end of the elastic contact tooth facing the copper busbar (12) is provided with an arc transition surface, and the radius R of the arc transition surface is 0.3mm~1.0mm.

3. The compact busbar trunking system for easy overall heat dissipation according to claim 1, characterized in that: The width of the fine tooth groove (23) is 0.5mm to 1.5mm, and the depth of the groove is 1 / 3 to 2 / 3 of the height of the convex strip (22).

4. The compact busbar trunking system for easy overall heat dissipation according to claim 1, characterized in that: The housing (11) includes two opposing first side plates and two opposing first cover plates. The inner side of the first side plate is attached to the wide side of the outermost copper busbar (12), and the outer side of the first side plate is provided with a corrugated heat dissipation structure. The side of the inner liner (21) away from the narrow side of the copper busbar (12) is attached to the inner side of the first cover plate.

5. A compact busbar trunking system for easy overall heat dissipation according to claim 1, characterized in that: It also includes a connector, which includes two connector side plates (33) respectively disposed on the outside of the two pressure plates (15), the two connector side plates (33) pressing against the outer side of the pressure plate (15), two second side plates (31) respectively disposed on the outside of the two connector side plates (33), and two second cover plates (32) respectively disposed on the upper and lower sides of the second side plates (31). The two second side plates (31) and the two second cover plates (32) together form a connector housing. The connector housing is sleeved on the outer side of the end of the housing (11). The two ends of the second side plates (31) are fixedly connected to the side of the end cover (14). The outer surface of the second side plates (31) is flush with the outer surface of the housing (11).

6. The compact busbar trunking system for easy overall heat dissipation according to claim 5, characterized in that: The connector also includes a double-ended bolt (34) that passes through the two connector side plates (33), a torque nut (35) threaded to both ends of the double-ended bolt (34) for pulling the connector side plates (33) inward, an insulating pad (36) disposed between adjacent copper busbars (12), and a conductive connecting piece (37) disposed in the middle of each insulating pad (36). The conductive connecting piece (37) spans between the ends of the copper busbars (12) of two adjacent busbars to achieve electrical conduction.

7. A compact busbar trunking system for easy overall heat dissipation according to claim 6, characterized in that: The conductive connecting piece (37) has a first through hole in the middle for the double-ended plug (34) to pass through, and the insulating pad (36) has a second through hole in the middle for the double-ended plug (34) to pass through. The diameter of the first through hole is larger than the diameter of the second through hole. When the conductive connecting piece (37) is embedded in the side of the insulating pad (36), the first through hole will be fitted outside the second through hole. The hole wall of the second through hole forms an insulating bushing between the first through hole and the double-ended plug (34) to prevent the conductive connecting piece (37) from contacting the double-ended plug (34), so that the plug body of the double-ended plug (34) is electrically isolated from the conductive connecting piece (37).

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