Busbar unit

Abstract

To improve the mechanical rigidity of the busbar body of a busbar unit having a cavity structure. [Solution] The present invention relates to an aluminum busbar unit (100) for current transmission, comprising a busbar body (101), a stabilizing structure (103), and a connecting unit (105) for electrical and mechanical connections of the busbar unit, wherein the busbar body includes a cavity structure (107) having at least one cavity (109) extending along the longitudinal axis (L) of the busbar body, the stabilizing structure includes at least one insertion element (111) at least partially inserted into at least one cavity, the stabilizing structure having higher mechanical rigidity than the busbar body, and the connecting unit is fixed to the connecting end (113) of the busbar body by a press connection.

Description

Technical Field

[0001] The present invention relates to an aluminum busbar unit for current transmission.

Background Art

[0002] Busbar units having a cavity structure, particularly aluminum busbar units, are known from the prior art.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The object of the present invention is to provide an improved busbar unit having a cavity structure.

Means for Solving the Problems

[0004] This object is achieved by the aluminum busbar unit of the independent claim. Advantageous improvements are the subject of the dependent claims.

[0005] According to one aspect, there is provided an aluminum busbar unit for current transmission, comprising a busbar body, a stabilization structure, and a connection unit for electrical and mechanical connection of the busbar unit, wherein the busbar body includes a cavity structure having at least one cavity extending along the longitudinal axis of the busbar body, the stabilization structure includes at least one insertion element at least partially inserted into the at least one cavity, the stabilization structure has a higher mechanical rigidity than the busbar body, and the connection unit is fixed to the connection end of the busbar body by a press connection.

[0006] This makes it possible to achieve the technical advantage of providing an improved aluminum busbar unit for current transmission. According to the present invention, the aluminum busbar unit includes a busbar body, the busbar body having a cavity structure with at least one cavity. The structural stability of the busbar body is greatly adversely affected by the cavity structure and aluminum material of the busbar body.

[0007] Consequently, the electrical connectivity between the busbar body and the connecting unit connected to the busbar body via the press joint is also significantly affected. This is because, due to its low structural rigidity, the busbar body flexes considerably when pressure is applied to achieve the press joint, and therefore the quality of the cold weld between the connecting unit and the busbar body, which can be achieved via the press joint, deteriorates.

[0008] The stabilization structure according to the present invention, having higher mechanical rigidity than the busbar body, makes it possible to reduce or prevent the collapse of at least one cavity due to the pressure applied to achieve a press connection, particularly by at least one insertion element that is at least partially inserted into at least one cavity. Thus, the rigid stabilization structure can improve the mechanical rigidity of the busbar body, at least in the region of the connection end where the connection unit is intended to be connected to the busbar body via the press connection portion.

[0009] The increased rigidity, particularly the addition of at least one insert element inserted into at least one cavity, allows the busbar body in the connection end region to more firmly resist the pressure applied by the press connection, thereby improving the quality of the cold weld between the busbar body and the connection unit, and consequently, the conductivity between the busbar body and the connection unit.

[0010] Furthermore, the cavity structure of the busbar body allows for the insertion of a coolant into the cavity structure, enabling thermal cooling of the busbar body during operation.

[0011] According to one embodiment, the cavity structure includes a plurality of cavities.

[0012] This achieves a technical advantage in that the multiple cavities in the cavity structure allow for better penetration of the busbar body by the cavity structure. When the above-mentioned coolant is filled into the cavity structure, this improves the cooling effect.

[0013] Here, the volume of the cavity structure can constitute, for example, 30-70% of the total volume of the busbar body.

[0014] According to one embodiment, the stabilizing structure includes a plurality of insertion elements.

[0015] This achieves the technical advantage of providing further stabilization or improved rigidity of the busbar body through multiple insertion elements of the stabilization structure.

[0016] According to one embodiment, the insert elements are placed in each of the cavities of the cavity structure.

[0017] This achieves the technical advantage of further improving the rigidity of the busbar body in the region of the connection end. Since the insertion elements are placed in each cavity of the cavity structure, liquid-tight sealing of the busbar body by the stabilizing structure can also be achieved. This prevents coolant leakage when the cavity structure is filled with coolant.

[0018] According to one embodiment, the cavity structure includes a through channel and a plurality of surrounding cavities at least partially radially arranged around the through channel.

[0019] This achieves the technical advantage of better penetration of the busbar body by the cavity structure. The periphery arrangement of the surrounding cavity around the through-channel allows for more uniform pressure distribution when the press connection is made.

[0020] According to one embodiment, the surrounding cavity of the connecting end of the busbar body is at least partially plastically deformed by the press connection, and the surrounding cavity is at least partially fluidly closed by the plastic deformation.

[0021] This makes it possible to achieve the technical advantage of providing additional sealing of the busbar body through plastic deformation.

[0022] According to one embodiment, at least one insertion element is inserted into the through channel.

[0023] This allows for better and more uniform pressure distribution by inserting at least one insertion element into the through-channel, thereby achieving the technical advantage of improving the press connection.

[0024] According to one embodiment, the through channel is formed in the center of the busbar body.

[0025] This achieves the technical advantage of improved pressure distribution due to press connection by forming a through-channel in the center of the busbar body. Because the through-channel is centrally located and the surrounding cavity is positioned around the through-channel, the cavity structure is configured symmetrically, and therefore the pressure distribution is uniformly directed towards the center of the busbar body. This enables a uniform contact connection between the connection unit and the busbar body and avoids asymmetric deformation of the busbar body.

[0026] According to one embodiment, the through-channel has a larger cross-section than the surrounding cavity.

[0027] This enables achieving the technical advantage that the smaller cross-section of the surrounding cavity can further enhance the structural stability of the busbar body in the edge region. Thereby, the press connection and the related electrical contact connection between the busbar body and the connection unit can be improved.

[0028] According to one embodiment, at least one cavity has a circular, elliptical, triangular, or polygonal cross-section.

[0029] This enables achieving the technical advantage that the various cross-sections of the cavity allow for optimal penetration of the busbar body by the cavity structure. When the cavity structure is filled with a coolant, the busbar body can be cooled more optimally.

[0030] According to one embodiment, the cross-section of at least one insertion element has the same shape and / or size as the cross-section of at least one cavity.

[0031] This enables achieving the technical advantage that by having the insertion element with the same shape and / or the same size cross-section as the cavity, the insertion element can be fully fitted into the cavity. Thereby, the structural rigidity of the busbar body can be improved, and when the cavity structure is filled with a coolant, the seal of the cavity structure by the stabilizing structure can be improved.

[0032] According to one embodiment, at least one insertion element is rod-shaped.

[0033] This enables achieving the technical advantage that the rod-shaped design of the insertion element allows the insertion element to be inserted better into the corresponding cavity. The elongated design of the insertion element enables changing the insertion depth, and by inserting the insertion element correspondingly through the expansion region of the connection end, the structural rigidity of the busbar body can be improved.

[0034] According to one embodiment, the stabilization structure includes a head structure connected to at least one insertion element, the diameter of the head structure being greater than the diameter of at least one insertion element, and the head structure abutting against the end face of the connecting end of the busbar body.

[0035] This allows for the technical advantage of improved stability of the stabilization structure through the head structure. If the stabilization structure includes multiple insert elements, the head structure makes it possible to insert multiple insert elements into their respective cavities using a single insertion process.

[0036] According to one embodiment, the stabilization structure fluidly closes at least partially the connecting end of the busbar body.

[0037] This makes it possible to achieve the technical advantage of further improving the fluid sealing of the cavity structure.

[0038] According to one embodiment, the stabilizing structure is manufactured from a conductive material.

[0039] This achieves the technical advantage of further improving the electrical contact connection between the busbar body and the connecting unit. Here, the stabilization structure makes mechanical and electrical contact with both the busbar body and the connecting unit.

[0040] According to one embodiment, the stabilizing structure is manufactured from plastic by a 3D printing method.

[0041] This achieves the technical advantage of enabling the simple manufacturing of stabilization structures using 3D printing methods. This is particularly advantageous for complex cavity structures with multiple variously configured cavities, and for corresponding stabilization structures with multiple insert elements.

[0042] According to one embodiment, a coolant for passively cooling the busbar body is formed in at least one cavity of the cavity structure.

[0043] This achieves the technical advantage of enabling passive cooling of the busbar body by the coolant. This allows the heat generated during current flow to be removed through the busbar body. As a result, the current conductivity of the busbar body is improved.

[0044] According to one embodiment, the coolant is in the form of a phase change storage material.

[0045] This achieves the technical advantage of efficiently removing heat generated in the busbar body during operation using a phase-change heat storage material. Furthermore, the correspondingly formed coolant can be provided within the cavity structure without mass transfer.

[0046] According to one embodiment, the press connection is in the form of a crimped connection, and / or the press connection is produced by an EMPT (electromagnetic pulse technology) method.

[0047] This achieves the technical advantage of providing an efficient press connection that enables a strong mechanical connection and efficient electrical connection between the busbar body and the connecting unit.

[0048] According to one embodiment, the connection unit includes a receiving sleeve, which is positioned around the connection end of the busbar body, and the stabilizing structure is held in the cavity structure by the receiving sleeve.

[0049] 20. This achieves the technical advantage of enabling a robust connection between the connecting unit and the busbar body. Since the stabilizing structure is held within the cavity structure, the fluid seal of the cavity structure can be further improved. Furthermore, the mechanical and optionally electrical connections between the stabilizing structure and the connecting unit are ensured by the receiving sleeve.

[0050] According to one embodiment, the receiving sleeve, together with the cavity structure, fluidly closes the connecting end of the busbar body.

[0051] This achieves the technical advantage of further improving the fluid seal of the busbar body.

[0052] According to one embodiment, the connection unit is in the form of a cable shoe.

[0053] This achieves the technical advantage of providing an efficient and widely usable connection unit.

[0054] According to one embodiment, the connecting unit is made of copper, and / or the stabilizing structure is made of copper or steel.

[0055] This allows both the connection unit and the stabilization structure to achieve the technical advantage of having optimal electrical efficiency and desired mechanical rigidity.

[0056] According to one embodiment, the receiving sleeve has two oppositely opening ends, and the liquid-tight closure of the busbar body is achieved via the head structure of the stabilizing structure.

[0057] This allows for the use of a technically simple connection unit, while still achieving the technical advantage of enabling liquid-tight sealing of the busbar body.

[0058] According to one embodiment, a method for manufacturing a busbar unit according to any one of the above embodiments, The busbar body (101) is provided with a cavity structure and a stabilization structure, Inserting at least one insertion element of the stabilizing structure into at least one cavity of the cavity structure, The connection end of the busbar body is covered axially by the connection unit, The connection unit is fixed to the busbar body via the press connection part. A method including this is provided.

[0059] This makes it possible to provide an improved method for manufacturing busbar units having the above-mentioned technical advantages.

[0060] According to one embodiment, the method further includes filling at least one cavity with a phase change material.

[0061] This allows for the technical advantage of achieving cooling of the busbar body using phase change materials.

[0062] According to one embodiment, a reaction force directed axially opposite to the compressive force of the press connection is provided by the stabilization structure.

[0063] This makes it possible to improve press connections, and the stronger and more stable structure of the busbar body has the effect of improving cold pressure welding between the busbar body and the connecting unit that occurs due to press connections.

[0064] The present invention will be described in more detail below with reference to the drawings. [Brief explanation of the drawing]

[0065] [Figure 1] This is a schematic diagram of an aluminum busbar unit according to one embodiment. [Figure 2]This is a further schematic diagram of an aluminum busbar unit according to a further embodiment. [Figure 3] This is a schematic diagram of the busbar body of an aluminum busbar unit according to one embodiment. [Figure 4] This is a schematic diagram of a busbar body having a stabilization structure, representing an aluminum busbar unit according to one embodiment. [Figure 5] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment. [Figure 6A] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment among several embodiments. [Figure 6B] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment among several embodiments. [Figure 6C] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment among several embodiments. [Figure 6D] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment among several embodiments. [Figure 6E] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment among several embodiments. [Figure 6F] This is a schematic cross-sectional view of an aluminum busbar unit according to one embodiment among several embodiments. [Figure 7] This is a schematic perspective view of two aluminum busbar units according to one embodiment. [Modes for carrying out the invention]

[0066] Figure 1 is a schematic diagram of an aluminum busbar unit 100 according to one embodiment.

[0067] According to the present invention, the aluminum busbar unit 100 comprises a busbar body 101, a stabilizing structure 103, and a connecting unit 105. In the illustrated embodiment, the busbar body 101 is cylindrical and includes a connecting end 113 having an end face 119.

[0068] Furthermore, a cavity structure 107 having at least one cavity 109 is formed in the busbar body 101. Here, the at least one cavity 109 extends along the longitudinal axis L of the busbar body 101.

[0069] In the illustrated embodiment, the cavity structure 107 includes a plurality of cavities 109.

[0070] In the illustrated embodiment, the cavity structure 107 includes a through channel 121 and a plurality of periphery cavities 123 arranged around the through channel 121. In the illustrated embodiment, the through channel 121 is formed in the center of the busbar body 101.

[0071] According to the present invention, the stabilizing structure 103 includes at least one insertion element 111 which is at least partially inserted into at least one cavity 109 of the cavity structure 107.

[0072] According to the present invention, the stabilizing structure 103 has higher mechanical hardness and / or mechanical rigidity than the busbar body 101.

[0073] In the illustrated embodiment, the insertion element 111 is rod-shaped. Furthermore, at least one insertion element 111 is inserted into the central through channel 121.

[0074] To make Figure 1 clearer, the inserted element 111 shown is not fully pressed into the through channel 121 and protrudes beyond the end face 119 of the connecting end 113 of the busbar body 101. However, the inserted element 111 may be fully pressed into each cavity 109 and terminated to coincide with the end face 119 of the connecting end 113.

[0075] In the illustrated embodiment, the connection unit 105 includes a receiving sleeve 125 and a connecting element 127. The connection unit 105 can be pressed against the busbar body 101 via the receiving sleeve 125.

[0076] According to the present invention, the connection unit 105 is connected to the busbar body 101 via a press connection portion. For clarity, Figure 1 shows the busbar body 101 and the connection unit 105 in a state where they are not connected.

[0077] The stabilizing structure 103 and in particular at least one insertion element 111 positioned in at least one cavity 109 of the cavity structure 107 can increase the structural strength of the busbar body 101 in the region of the connecting end 113, and thus can improve the press connection between the busbar body 101 and the receiving sleeve 125 of the connecting unit 105, thereby improving both the mechanical and electrical contact connections. In the illustrated embodiment, the connecting unit 105 is in the form of a cable shoe.

[0078] According to one embodiment, the stabilizing structure 103, including the insert element 111, can be formed from a conductive material, such as copper or steel. Alternatively, the stabilizing structure 103 can be manufactured from plastic using a 3D printing method.

[0079] According to one embodiment, the cavity 109 of the cavity structure is filled with a coolant for passively cooling the busbar body 101. The coolant may be, for example, a phase change material. Figure 1 shows the busbar body 101 without the coolant for illustrative purposes.

[0080] In the illustrated embodiment, the receiving sleeve 125 of the connection unit 105 is designed as a sleeve that is closed on one side. Therefore, when the connection unit 105 is positioned on the busbar body 101 and fixed to the busbar body 101 by the press connection portion, the receiving sleeve 125 may be configured to fluidly seal the busbar body 101 and the cavity structure 107 formed in the busbar body 101.

[0081] According to one embodiment, the press connection portion that connects the receiving sleeve 125 of the connection unit 105 to the busbar body 101 is in the form of a mechanical crimp connection portion. Alternatively, the press connection portion can be generated by an EMPT (electromagnetic pulse energy technology) method.

[0082] According to one embodiment, the insertion element 111 can be designed in a way that allows for easy insertion into the cavity 109. For example, the insertion element 111 may be conical in shape and may include an insertion assist portion that allows the insertion element 111 to be pushed into the cavity 109.

[0083] Figure 2 is a further schematic diagram of an aluminum busbar unit 100 according to a further embodiment.

[0084] The embodiment in Figure 2 is based on the embodiment in Figure 1.

[0085] In the illustrated embodiment, the stabilization structure 103 further includes a head structure 117 connected to at least one insertion element 111. The head structure 117 here has a larger diameter than at least one insertion element 111 and here is configured to cover the end face 119 of the connecting end 113 of the busbar body 101 when at least one insertion element 111 is fully inserted into its respective cavity 109.

[0086] Therefore, the fluid seal of the busbar body 101 and, in particular, the cavity structure 107 can be generated by the head structure 117 of the stabilization structure 103.

[0087] In the illustrated embodiment, the receiving sleeve 125 of the connection unit 105 is designed as an open sleeve having two open ends.

[0088] The embodiment of the stabilization structure 103 in Figure 2 may be combined with the embodiment of the connection unit 105 in Figure 1.

[0089] Figure 3 is a schematic diagram of the busbar body 101 of an aluminum busbar unit 100 according to one embodiment.

[0090] Figure 3 clearly shows the cavity structure of the embodiments of Figures 1 and 2. The through channel 121 is formed in the center of the busbar body 101, and the periphery cavity 123 is positioned circumferentially around the central through channel 121.

[0091] In the illustrated embodiment, the through channel 121 has a circular cross-section. On the other hand, the multiple surrounding cavities 123 have a trapezoidal cross-section in the broadest sense. Furthermore, the through channel 121 has a substantially larger cross-section than the surrounding cavities 123.

[0092] The number and arrangement or size ratio of the perimeter cavities 123 and through-channels 121 shown in the illustration are merely examples and may differ from those shown.

[0093] When press-fitting is performed to secure the connection unit 105 to the busbar body 101, the surrounding cavity 123 of the cavity structure 107 can be partially plastically deformed by the pressure applied to the receiving sleeve 125, thereby causing the press-fit. This plastic deformation allows the surrounding cavity 123 to be fluidly closed, at least partially.

[0094] The busbar body 101 shown in Figure 4 corresponds to the embodiment shown in Figure 3.

[0095] Further embodiments of the stabilization structure 103 are shown next to the busbar body 101. The illustrated stabilization structure 103 includes a plurality of insertion elements 111. The insertion elements 111 are correspondingly rod-shaped and fixed to the illustrated plate-shaped head structure 117.

[0096] In the illustrated embodiment, the stabilization structure 103 includes a central insertion element 129 positioned in the center of the plate-shaped head structure 117, and a plurality of peripheral insertion elements 131 arranged around the central insertion element 129.

[0097] The arrangement of multiple insertion elements 111 corresponds here to the arrangement of multiple cavities 109 in the cavity structure 107. The stabilizing structure 103 has, here, an insertion element 111 corresponding to each cavity 109 of the cavity structure 107.

[0098] The insert element 111 is designed so that its cross-section corresponds in shape and size to the cross-section of the cavity 109 of the cavity structure 107. The central insert element 129 is designed so, as with the surrounding cavity 123, to correspond to the through channel 121 which has a larger circular cross-section than the surrounding insert element 131.

[0099] Figure 4 is a schematic diagram of a busbar body 101 having a stabilization structure 103, which is part of an aluminum busbar unit 100 according to one embodiment.

[0100] Although not directly visible in Figure 4, the surrounding insertion element 131 has a substantially trapezoidal cross-section, similar to the surrounding cavity 123.

[0101] In the illustrated embodiment, the stabilizing structure 103 is manufactured from plastic by a 3D printing method. In a complex stabilizing structure 103 having numerous variously designed insert elements 111, the 3D printing method can be an advantageous manufacturing method here.

[0102] Figure 5 is a schematic cross-sectional view of an aluminum busbar unit 100 according to one embodiment.

[0103] Figure 5 shows the aluminum busbar unit 100 according to the present invention in an assembled state. For this purpose, the stabilization structure 103 is formed on the connecting end 113 of the busbar body 101. In the illustrated embodiment, for the sake of simplicity of explanation, the cavity structure 107 includes only one cavity 109. Accordingly, the stabilization structure 103 similarly has only one insertion element 111 inserted into the one cavity 109. In the illustrated embodiment, the stabilization structure 103 according to the embodiments of Figures 2 and 4 has a head structure 117. The insertion element 111 is fully inserted into the cavity 109 so that the head structure 117 abuts against the end face 119 of the connecting end 113 of the busbar body 101, thereby fluidly closing the cavity structure 107.

[0104] In the illustration, the busbar body 101 has a diameter D1, and one of the cavities 109 shown has a diameter D2.

[0105] In the region of the connection end 113 where the receiving sleeve 125 is connected to the busbar body 101 via the press connection, the diameter D1 of the busbar body 101 is compressed to a smaller diameter D3 by the axial pressure applied to the receiving sleeve 125, which is necessary to create the press connection.

[0106] By inserting the insertion element 111 into at least one cavity 109, the diameter D2 of the cavity 109 is not substantially affected by the press connection, and the insertion element 111 prevents plastic deformation of the cavity 109.

[0107] Figures 6A to 6F are schematic cross-sectional views of several embodiments of the aluminum busbar unit 100.

[0108] Various embodiments of the busbar body 101 and, in particular, the cavity structure 107 are shown in Figures 6A to 6F. For this purpose, Figures 6A to 6F show schematic front cross-sectional views of various embodiments of the busbar body 101.

[0109] The embodiment shown in Figure 6A, based on the embodiments in Figures 1 to 4, shows a cavity structure 107 having a central through channel 121 and a plurality of surrounding cavities 123 arranged around the central through channel 121.

[0110] However, deviating from the embodiments shown in Figures 1 to 4, in the illustrated embodiment, all of the illustrated cavities 109 each have a circular cross-section.

[0111] The cavity structure in Figure 6B shows multiple cavities 109. Each of the cavities 109 here has a circular cross-section of the same size and is arranged in a symmetrical cross-shaped configuration.

[0112] In Figures 6C and 6D, each illustrated cavity structure 107 has a plurality of cavities 109 having a circular cross-section. In the illustrated embodiments, the various cavities 109 each have a cross-section of a different size. Furthermore, the illustrated cavities 109 are arranged asymmetrically within the busbar body 101.

[0113] Deviating from the embodiments of Figures 6A, 6B, 6D, 6E, and 6F, in which the busbar body 101 has a circular cross-section, the embodiment of Figure 6C has an octagonal cross-section. As an alternative example, the busbar body 101 may have a polygonal cross-section with a different configuration.

[0114] In the embodiment shown in Figure 6E, the cavity structure 107 has only one cavity 109, which in this case has a spiral cross-section.

[0115] Figure 6F shows a cavity structure having multiple cavities 109 arranged around the center of the busbar body 101. Each cavity 109 here has a triangular cross-section of the same size.

[0116] As an alternative to the illustrated embodiment, the cavity 109 may have an elliptical or polygonal cross-section designed in any other way.

[0117] The design or arrangement of various cavities 109 of the cavity structure 107 can be done here, depending on the application, taking into consideration filling the cavity structure 107 with the coolant described above. Depending on the application of the busbar unit 100, each cavity structure 107 may be configured with respect to the preferred rigidity of the busbar body 101 and / or with respect to the optimized cooling effect of the coolant placed in the cavities 109 of the cavity structure 107.

[0118] The cavity structure 107 can have a volume that accounts for 30-70% of the total volume of the busbar body 101.

[0119] Figure 7 is a schematic perspective view of two aluminum busbar units 100 according to one embodiment.

[0120] Figure 7 shows two aluminum busbar units 100 according to the present invention in an assembled state. At the connecting end 113, each connecting unit 105 is fixed to the busbar body 101 by a press joint 115. In the illustrated embodiment, the press joint 115 is designed as a segmented radial crimp joint. The receiving sleeve 125 here has a grooved region 133 created by mechanical pressure during the crimping process. [Explanation of Symbols]

[0121] 100 Busbar Unit 101 Busbar Body 103 Stabilizing Structure 105 Connection Unit 107 Cavity structure 109 Cavity 111 Insertion elements 113 Connection end 115 Crimp connection 117 Head Structure 119 End face 121 Central through channel 123 Surround Cavity 125 receiving sleeves 127 Connecting elements 129 Central insertion element 131 Surrounding insertion element 133 Grooved area L Longitudinal axis D1 Busbar body diameter D2 Cavity Diameter D3 Busbar Body Diameter

Claims

1. An aluminum busbar unit (100) for current transmission, The busbar body (101) and Stabilizing structure (103), A connection unit (105) for electrical and mechanical connections of the busbar unit (100) and Equipped with, The busbar body (101) includes a cavity structure (107) having at least one cavity (109), The stabilizing structure (103) includes at least one insertion element (111) that is at least partially inserted into the at least one cavity (109), The stabilizing structure (103) has mechanical rigidity that is at least equal to that of the busbar body (101), The connection unit (105) overlaps the stabilization structure (103) axially at the connection end (113) of the busbar body (101) and is fixed by a press connection part (115), forming an aluminum busbar unit (100).

2. The busbar unit (100) according to claim 1, wherein the cavity structure (107) includes a plurality of cavities (109).

3. The busbar unit (100) according to claim 2, wherein the stabilizing structure (103) includes a plurality of insertion elements (111).

4. The busbar unit (100) according to claim 3, wherein the insertion elements (111) are arranged in each of the cavities (109) of the cavity structure (107).

5. The busbar unit (100) according to any one of claims 1 to 4, wherein the cavity structure (107) includes a through channel (121) and a plurality of periphery cavities (123) at least partially radially arranged around the through channel (121).

6. The surrounding cavity (123) of the connecting end (113) of the busbar body (101) is at least partially plastically deformed by the press connection portion (115), The surrounding cavity (123) is at least partially fluidly closed by the plastic deformation, and / or The busbar unit (100) according to claim 5, wherein at least one insertion element (111) is inserted into the through channel (121).

7. The busbar unit (100) according to any one of claims 5 to 7, wherein the through channel (121) is formed in the center of the busbar body (101).

8. The busbar unit (100) according to any one of claims 5 to 8, wherein the through channel (121) has a larger cross-section than the surrounding cavity (123).

9. The at least one cavity (109) has a circular, elliptical, triangular, or polygonal cross-section, and / or The cross-section of the at least one insertion element (111) has the same shape and / or size as the cross-section of the at least one cavity (109), and / or The busbar unit (100) according to any one of claims 1 to 8, wherein the at least one insertion element (111) is rod-shaped.

10. The stabilizing structure (103) includes a head structure (117) connected to the at least one insertion element (111), wherein the diameter of the head structure (117) is greater than the diameter of the at least one insertion element (111), and / or The head structure (117) abuts against the end face (119) of the connecting end (113) of the busbar body (101), and / or The stabilization structure (103) fluidly closes at least partially the connecting end (113) of the busbar body (101), and / or The busbar unit (100) according to any one of claims 1 to 9, wherein the stabilizing structure (103) is manufactured from a conductive material.

11. The busbar unit (100) according to any one of claims 1 to 14, wherein the stabilizing structure (103) is manufactured from plastic by a 3D printing method.

12. A coolant for cooling the busbar body (101) is formed in at least one cavity (109) of the cavity structure (107), and the coolant is in the form of a phase-change heat storage material, according to any one of claims 1 to 11, the busbar unit (100).

13. The press connection portion (115) is in the form of a crimp connection portion (115), and / or, The aforementioned press connection portion (115) is generated by an EMPT (electromagnetic pulse technology) method and / or, The connection unit (105) includes a receiving sleeve (125), the receiving sleeve (125) is positioned around the connection end (113) of the busbar body (101), and the stabilizing structure (103) is held in the cavity structure (107) by the receiving sleeve (125), and / or The receiving sleeve (125), together with the cavity structure (107), liquid-tightly seals the connecting end (113) of the busbar body (101), and / or The aforementioned connection unit (105) is in the form of a cable shoe, and / or, The aforementioned connection unit (105) is made of copper and / or The stabilizing structure (107) is made from copper or steel, and / or The busbar unit (100) according to any one of claims 1 to 12, wherein the receiving sleeve (125) has two oppositely opening ends, and the liquid-tight closure of the busbar body (101) is achieved via the head structure (117) of the stabilizing structure (103).

14. A method for manufacturing a busbar unit (100) according to any one of claims 1 to 24, The busbar body (101) is provided with a cavity structure (107) and a stabilization structure (103), Inserting at least one insertion element (111) of the stabilizing structure (103) into at least one cavity (109) of the cavity structure (107), The connecting end (113) of the busbar body (101) is covered axially by the connecting unit (105), The connection unit (105) is fixed to the busbar body (101) via the press connection portion. Methods that include...

15. The aforementioned press connection portion is in the form of a crimp connection portion (115), and / or, The aforementioned press connection portion (115) is generated by an EMPT (electromagnetic pulse technology) method and / or, The method further comprises filling the at least one cavity (109) with a phase change material, and / or The method according to claim 14, wherein the busbar body (101) is fluidly closed by the connecting unit.

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