Bus duct
By stacking the same-pole busbars in the DC bus trunking and wrapping them entirely with insulating material, the problems of large temperature gradient between busbars and high processing costs are solved, achieving higher current carrying capacity and cost-effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SCHNEIDER ELECTRIC (CHINA) CO LTD
- Filing Date
- 2025-06-10
- Publication Date
- 2026-06-26
AI Technical Summary
The temperature gradient between busbars of the same pole in a DC bus trunking is large, which affects the current carrying capacity, and conventional solutions increase processing costs and time.
The same-pole busbars are stacked and wrapped with insulating material. The outer surfaces of the first and second groups of busbars are covered with first and second insulating components respectively to reduce thermal resistance and improve heat dissipation.
It significantly reduces the temperature gradient between busbars of the same polarity, improves current carrying capacity, and saves processing costs and time.
Smart Images
Figure CN224418382U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of this disclosure generally relate to the field of electrical equipment technology, and more specifically, to a busbar trunking. Background Technology
[0002] A DC busbar is a conductive device used to transmit and distribute DC power. The busbars of a DC busbar are typically made of conductive material and are used to connect DC power sources and various load devices to achieve power transmission and supply. However, due to the large temperature gradient between busbars of the same pole, the current-carrying capacity of the busbars can be affected. Utility Model Content
[0003] In one aspect of this disclosure, a busbar trunking is provided. The busbar trunking includes: a housing extending along a length direction; a first set of busbars disposed in the housing along the length direction, the first set of busbars being stacked on top of each other in a thickness direction perpendicular to the length direction to form a first pole of the busbar trunking; a first insulating member covering a middle portion of the outer surface of the first set of busbars along the length direction; a second set of busbars disposed in the housing along the length direction, the second set of busbars being stacked on top of each other in the thickness direction to form a second pole of the busbar trunking; and a second insulating member covering a middle portion of the outer surface of the second set of busbars along the length direction or covering a middle portion of the outer surface of the first set of busbars, the first insulating member, and the second set of busbars integrally formed along the length direction.
[0004] According to embodiments of this disclosure, by stacking multiple busbars of the same polarity together and wrapping the entire perimeter with insulating material, the heat dissipation capacity of the busbars can be improved, the temperature gradient between the multiple busbars of the same polarity can be significantly reduced, thereby reducing the overall temperature rise of the busbars of the same polarity and improving the current carrying capacity of the busbars. Furthermore, compared to the conventional method of wrapping each busbar of the same polarity with insulating material and then stacking multiple busbars together, the embodiments of this disclosure, by wrapping the entire perimeter of the multiple busbars of the same polarity with insulating material, can save processing time and further reduce processing costs.
[0005] In some embodiments, the first group of busbars includes a pair of busbars, and the second group of busbars includes a pair of busbars.
[0006] In some embodiments, each of the first group of busbars and the second group of busbars includes: a straight section extending along the length direction; and a pair of bent portions formed at both ends of the straight section and bent relative to the straight section in the thickness direction.
[0007] In some embodiments, the first insulating member covers at least a portion of the outer surface of the straight section of the first busbar, and the second insulating member covers at least a portion of the outer surface of the straight section of the second busbar.
[0008] In some embodiments, the straight section is located within the housing, and the pair of bent portions extend from both ends of the housing, respectively.
[0009] In some embodiments, a pair of bends in each of the first group of busbars bends along the thickness direction toward a direction away from the second group of busbars, and a pair of bends in each of the second group of busbars bends along the thickness direction toward a direction away from the first group of busbars.
[0010] In some embodiments, each of the pair of bent portions includes: an inclined segment disposed at one end of the straight segment at an angle relative to the length direction; and a connecting segment extending outward along the length direction from the end of the inclined segment away from the straight segment.
[0011] In some embodiments, the straight sections of adjacent busbars in the first group of busbars are in contact with each other, and the connecting sections on the same side of adjacent busbars in the first group of busbars are spaced apart from each other; and the straight sections of adjacent busbars in the second group of busbars are in contact with each other, and the connecting sections on the same side of adjacent busbars in the second group of busbars are spaced apart from each other.
[0012] In some embodiments, each of the first group of busbars and the second group of busbars is further provided with a pair of third insulating members, each of the pair of third insulating members wrapping the corresponding inclined segment.
[0013] In some embodiments, the pair of third insulating members also each wrap a portion of the corresponding connecting segment and a portion of the straight segment.
[0014] In some embodiments, the third insulating element includes insulating tape.
[0015] In some embodiments, one or more busbar assemblies are arranged in the width direction of the busbar trunking, and the busbar assembly includes the first busbar, the first insulating element, the second busbar and the second insulating element.
[0016] It should be understood that the description in this section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description
[0017] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:
[0018] Figure 1 A schematic diagram of the structure of a busbar trunking according to some embodiments of the present disclosure is shown;
[0019] Figure 2 A schematic diagram of the structure of a busbar assembly according to some embodiments of the present disclosure is shown, wherein a first portion and a second portion of the busbar assembly are adjacent to each other;
[0020] Figure 3 A schematic diagram of the structure of a busbar assembly according to some embodiments of the present disclosure is shown, wherein a first part and a second part of the busbar assembly are spaced apart from each other;
[0021] Figure 4 An exploded view of the first and second portions of a busbar assembly according to some embodiments of the present disclosure is shown;
[0022] Figure 5 A partial schematic diagram of the second portion of a busbar assembly according to some embodiments of the present disclosure is shown;
[0023] Figure 6 A partial exploded view of a first portion of a busbar assembly according to some embodiments of the present disclosure is shown; and
[0024] Figure 7 A partial schematic diagram is shown showing a second insulating member covering a first group of busbars, and the first insulating member and the second group of busbars forming an integral unit according to some embodiments of the present disclosure.
[0025] Explanation of reference numerals in the attached figures:
[0026] 10 is the first group of busbars, 11 is the straight section, 12 is the bent section, 20 is the second group of busbars, 30 is the first insulating component, 40 is the second insulating component, 50 is the housing, 60 is the third insulating component, 80 is the busbar assembly, 81 is the first part, 82 is the second part, 100 is the bus trough, 121 is the inclined section, 122 is the connecting section, X is the length direction, Y is the width direction, and Z is the thickness direction. Detailed Implementation
[0027] Embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.
[0028] The term “comprising” and its variations, as used herein, indicate an open-ended inclusion, meaning “including but not limited to”. Unless otherwise stated, the term “or” means “and / or”. The terms “first,” “second,” etc., may refer to different or the same objects.
[0029] As described above, the busbars of a DC bus trunking system are typically made of conductive material and are used to connect DC power supplies and various load devices to achieve power transmission and supply. When a conventional AC three-phase four-wire bus trunking system is applied to a DC application scenario, the insulation film covering each busbar of the same pole affects its heat dissipation performance, resulting in a large temperature gradient between the busbars and thus affecting their current-carrying capacity. Embodiments of this disclosure provide a bus trunking system to at least partially solve the above-mentioned problems. See below for further details. Figures 1 to 7 Busbar trunking according to embodiments of the present disclosure will be described.
[0030] Figure 1 A schematic diagram of the structure of a busbar 100 according to some embodiments of the present disclosure is shown. For example... Figure 1 As shown, the busbar 100 described herein generally includes a housing 50 and a busbar assembly 80 disposed within the housing 50. The housing 50 and the busbar assembly 80 generally extend along the length direction X. For ease of understanding, Figure 1 The diagram also shows the width direction Y and thickness direction Z of the busbar in the busbar assembly 80. The length direction X, width direction Y, and thickness direction Z are perpendicular to each other. The housing 50 is a longitudinal frame structure and surrounds the main body of the busbar assembly 80 to provide stable mechanical support for the busbar assembly 80 and prevent the main body of the busbar assembly 80 from external physical damage. The opposite ends of the busbar assembly 80 extend from the housing 50 for connection with corresponding connectors. The length of the housing 50 can be set according to the length of the busbar assembly 80. In some embodiments, the housing 50 may include multiple parts connected to each other to meet the length requirements of the busbar assembly 80. Next, reference will be made to... Figures 2 to 7 To describe an exemplary structure of the busbar assembly 80.
[0031] Figure 2 and Figure 3 A schematic diagram of the structure of a busbar assembly 80 according to some embodiments of the present disclosure is shown. For example... Figure 2 and Figure 3 As shown, the busbar assembly 80 generally includes a first part 81 and a second part 82. Figure 2 The first portion 81 and the second portion 82 of the busbar assembly 80 shown are adjacent to each other. Figure 1 The first part 81 and the second part 82 can be substantially stacked on top of each other in the housing 50. Figure 3The first portion 81 and the second portion 82 of the busbar assembly 80 shown are spaced apart from each other to illustrate some structural details of the first portion 81 and the second portion 82. The first portion 81 can form the first pole of the busbar 100, and the second portion 82 can form the second pole of the busbar 100. The first pole of the busbar 100 can be either a positive or a negative pole. The second pole of the busbar 100 can be either a positive or a negative pole. In this way, the busbar 100 can be applied to DC applications.
[0032] Figure 4 An exploded view of a first portion 81 and a second portion 82 of a busbar assembly 80 according to some embodiments of the present disclosure is shown. Figure 5 A partial schematic diagram of the second portion 82 of a busbar assembly 80 according to some embodiments of the present disclosure is shown. Figure 6 A partial exploded view of the first portion 81 of a busbar assembly 80 according to some embodiments of the present disclosure is shown. Figure 7 A partial schematic diagram is shown showing a second insulating member 40 covering a first busbar 10, a first insulating member 30, and a second busbar 20, forming an integral unit according to some embodiments of the present disclosure. Next, reference will be made to... Figures 3 to 7 Here is an example structure to describe the first part 81 and the second part 82 of the busbar assembly 80.
[0033] like Figure 3 and Figure 4 As shown, the first part 81 includes a first busbar 10 and a first insulating element 30, and the second part 82 includes a second busbar 20 and a second insulating element 40. (Combined) Figure 1 The first group of busbars 10 and the second group of busbars 20 are respectively disposed in the housing 50 along the length direction X. The first group of busbars 10 are stacked on top of each other in the thickness direction Z to form the first pole of the busbar 100. The second group of busbars 20 are stacked on top of each other in the thickness direction Z to form the second pole of the busbar 100. As described above, the first pole can be either a positive pole or a negative pole, and the second pole can be either a positive pole or a negative pole.
[0034] like Figure 3 and Figure 4 As shown, the first insulating member 30 covers the middle portion of the outer surface of the first busbar 10 along the length direction X. The second insulating member 40 covers the middle portion of the outer surface of the second busbar 20 along the length direction X. In other embodiments, such as Figure 7 As shown, the second insulating member 40 can also cover the middle portion of the outer surface of the first busbar 10, the first insulating member 30, and the second busbar 20 as a whole. That is, when the first insulating member 30 covers the first busbar 10, the second insulating member 40 covers the outside of the first insulating member 30 and the second busbar 20.
[0035] In some embodiments, each of the first insulator 30 and the second insulator 40 may include an insulating film, such as a PET polyester film. In other embodiments, each of the first insulator 30 and the second insulator 40 may include other known or future available insulating materials.
[0036] In some conventional busbar trunking systems, multiple busbars of the same pole are individually covered with insulating material and then stacked together to form one pole of the busbar trunking 100. This structure increases the thermal resistance between busbars of the same pole, affecting the heat dissipation capacity of the busbars and resulting in a large temperature difference between them and a high overall temperature rise. In contrast, according to the embodiments of this disclosure, by using insulating material to completely cover the outer surface of the busbars of the same pole, that is, using a first insulating element 30 to cover the outer surface of the first group of busbars 10 and a second insulating element 40 to cover the outer surface of the second group of busbars 20, a first insulating covering layer and a second insulating covering layer are formed respectively. In this way, not only can the first group of busbars 10 and the second group of busbars 20 be insulated from the outside, but the thermal resistance is also effectively reduced, and the heat dissipation capacity of the busbars is improved. Therefore, without increasing the cross-sectional width of the busbars, the temperature gradient between multiple busbars of the same pole can be significantly reduced, thereby reducing the overall temperature rise of the busbars of the same pole and improving the current carrying capacity of the busbars.
[0037] See Figure 4 In some embodiments, each of the first group of busbars 10 and the second group of busbars 20 includes a straight section 11 and a pair of bends 12. The straight section 11 extends along the length direction X. The pair of bends 12 are formed at both ends of the straight section 11 and are bent relative to the straight section 11 in the thickness direction Z. With this arrangement, it is possible to connect to an external connector via the bends 12, thereby enabling parallel connection of busbars of the same pole and connection to busbars in other busbar trunking.
[0038] As mentioned above, the first insulating member 30 covers the middle portion of the outer surface of the first busbar 10, and the second insulating member 40 covers the middle portion of the outer surface of the second busbar 20. In some embodiments, the middle portion may include the entire straight section 11. That is, the first insulating member 30 covers the entire outer surface of the straight section 11 of the first busbar 10, and the second insulating member 40 covers the entire outer surface of the straight section 11 of the second busbar 20. In other embodiments, the middle portion may also include a portion of the straight section 11. That is, the first insulating member 30 covers a portion of the outer surface of the straight section 11 of the first busbar 10, and the second insulating member 40 covers a portion of the outer surface of the straight section 11 of the second busbar 20. In still other embodiments, in addition to the straight section 11, the middle portion may also include a partial bend 12. That is, the first insulating member 30 covers the entire straight section 11 and part of the bent portion 12 of the first busbar 10, and the second insulating member 40 covers the entire straight section 11 and part of the bent portion 12 of the second busbar 20. In other embodiments, the second insulating member 40 may also cover the middle portion of the outer surface of the first busbar 10, the first insulating member 30, and the second busbar 20 as a whole. In this way, reliable insulation between the first busbar 10 and the second busbar 20 is ensured. It should be understood that the coverage area of the first insulating member 30 and the second insulating member 40 can be adjusted accordingly based on heat dissipation requirements, installation requirements, etc.
[0039] See Figures 2 to 4 In some embodiments, the first group of busbars 10 may include a pair of busbars, and the second group of busbars 20 may include a pair of busbars. To apply a conventional AC three-phase four-wire busbar system to DC applications, the A-phase busbar and B-phase busbar can be connected in parallel as one pole, and the C-phase busbar and neutral busbar can be connected in parallel as one pole. In some embodiments, the A-phase busbar and B-phase busbar can be connected in parallel as one pole and then covered with a first insulating element 30, and the C-phase busbar and neutral busbar can be connected in parallel as one pole and then covered with a second insulating element 40. In some embodiments, such as Figure 7 As shown, the A-phase busbar and B-phase busbar can also be connected in parallel as one pole and then covered with the first insulating element 30. The C-phase busbar and neutral busbar can be connected in parallel as one pole, and then combined with the pole of the A-phase busbar and B-phase busbar connected in parallel and covered with the first insulating element 30. The combined assembly is then covered with the second insulating element 40. In this way, using a conventional three-phase four-wire busbar trunking, with two phases as positive poles and the other two as negative poles, the three-phase four-wire busbar trunking can be effectively adapted to DC application scenarios, saving costs and installation time. It should be understood that in other embodiments, each of the first group of busbars 10 and the second group of busbars 20 may include more busbars, such as three, four, or more, which can be selected according to design requirements.
[0040] Return to reference Figure 1 In some embodiments, the straight section 11 is located within the housing 50, and a pair of bent portions 12 extend from both ends of the housing 50. In this way, it is convenient for the pair of bent portions 12 to be connected to the connector.
[0041] Continue reading Figures 2 to 4 The bends 12 of the first group of busbars 10 can be arranged substantially symmetrically with the bends 12 of the second group of busbars 20 in the thickness direction Z. In some embodiments, a pair of bends 12 of each busbar 10 in the first group of busbars 10 bends along the thickness direction Z toward a direction away from the second group of busbars 20, and a pair of bends 12 of each busbar 20 in the second group of busbars 20 bends along the thickness direction Z toward a direction away from the first group of busbars 10. In this way, the connection between the busbar trunking 100 and the connector is facilitated, the current is evenly distributed between the two groups of busbars, and the problems of temperature rise and current unevenness caused by uneven current are reduced.
[0042] See Figure 5 and Figure 6 In some embodiments, each of the pair of bends 12 includes an inclined section 121 and a connecting section 122. The connecting section 122 is an electrical contact area at the end of the busbar for connection with a connector. The inclined section 121 may be inclined at one end of the straight section 11 relative to the length direction X. The connecting section 122 may be formed at the end of the inclined section 121 away from the straight section 11 and extend outward along the length direction X. In this way, the busbar can be connected to the connector through the bends 12 at both ends.
[0043] like Figures 4 to 6 As shown, in some embodiments, the straight sections 11 of adjacent busbars 10 in the first group of busbars 10 are in contact with each other, and the straight sections 11 of adjacent busbars 20 in the second group of busbars 20 are in contact with each other. In this way, multiple busbars are in close contact and can be regarded as a single busbar, thereby avoiding a large temperature gradient between busbars of the same pole and improving the current carrying capacity of the busbar.
[0044] In some embodiments, the connecting segments 122 on the same side of adjacent busbars 10 in the first group of busbars 10 are spaced apart from each other, and the connecting segments 122 on the same side of adjacent busbars 20 in the second group of busbars 20 are spaced apart from each other. In this way, the connecting segments 122 of the same side busbars are parallel and spaced apart from each other, which can achieve double-sided overlap with the connector.
[0045] Continue reading Figure 4 and Figure 6 In some embodiments, each of the first group of busbars 10 and the second group of busbars 20 is further provided with a pair of third insulating members 60. Each pair of third insulating members 60 wraps around a corresponding inclined section 121. In this way, when the busbar is connected to the connector, it is possible to prevent operators from contacting the live busbar, thereby improving electrical safety.
[0046] In some embodiments, to further improve operational safety, the third insulating member 60 may wrap around the corresponding inclined segment 121 and extend further to both sides of the inclined segment 121. That is, each pair of third insulating members 60 may also wrap around a portion of the corresponding connecting segment 122 and a portion of the straight segment 11.
[0047] In some embodiments, the third insulating element 60 may include insulating tape. For example, the insulating tape 60 may be a high-temperature resistant electrical insulating tape. In some embodiments, the third insulating element 60 may be wrapped around the corresponding position of the busbar.
[0048] In some embodiments, each of the first group of busbars 10 and the second group of busbars 20 may comprise a solid rectangular bar. In other embodiments, each of the first group of busbars 10 and the second group of busbars 20 may also comprise a hollow rectangular bar. In still other embodiments, each of the first group of busbars 10 and the second group of busbars 20 may be other types of busbars, and these implementations also fall within the scope of this disclosure.
[0049] In some embodiments, one or more identical busbar assemblies 80 can be placed along the width direction Y of the busbar trunking 100 to adapt to the needs of low-current and high-current DC buses. For example, two sets of busbar assemblies 80 can be placed along the width direction Y of the busbar trunking 100, with the positive terminals of the first set of busbar assemblies 80 and the second set of busbar assemblies 80 connected in parallel, and the negative terminals of the first set of busbar assemblies 80 and the second set of busbar assemblies 80 connected in parallel. If each set of busbar assemblies 80 carries a maximum current of 800A, connecting the two sets of busbar assemblies in parallel can allow the two sets of busbar assemblies 80 to carry a maximum current of 1600A.
[0050] In some embodiments, one or more identical busbar trunking 100s may be placed in the width direction Y of the busbar trunking 100 to adapt to the needs of low-current and high-current DC buses.
[0051] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A busbar trunking system (100), characterized in that, include: The shell (50) extends along the length direction (X); The first group of busbars (10) is disposed in the housing (50) along the length direction (X), and the first group of busbars (10) are stacked on top of each other in the thickness direction (Z) perpendicular to the length direction (X) to form the first pole of the busbar groove (100); The first insulating element (30) covers the middle portion of the outer surface of the first group of busbars (10) along the length direction (X); The second group of busbars (20) is disposed in the housing (50) along the length direction (X), and the second group of busbars (20) are stacked on top of each other in the thickness direction (Z) to form the second pole of the busbar groove (100); as well as The second insulating element (40) covers the middle portion of the outer surface of the second group of busbars (20) along the length direction (X) or covers the middle portion of the outer surface of the first group of busbars (10), the first insulating element (30) and the second group of busbars (20) as a whole along the length direction (X).
2. The busbar trunking (100) according to claim 1, characterized in that, The first group of busbars (10) includes a pair of busbars (10), and the second group of busbars (20) includes a pair of busbars (20).
3. The busbar trunking (100) according to claim 1, characterized in that, Each of the first group of busbars (10) and the second group of busbars (20) includes: A straight segment (11) extends along the length direction (X); and A pair of bent portions (12) are formed at both ends of the straight section (11) and are bent relative to the straight section (11) in the thickness direction (Z).
4. The busbar trunking (100) according to claim 3, characterized in that, The first insulating member (30) covers at least a portion of the outer surface of the straight section (11) of the first busbar (10), and the second insulating member (40) covers at least a portion of the outer surface of the straight section (11) of the second busbar (20).
5. The busbar trunking (100) according to claim 3, characterized in that, The straight section (11) is located inside the housing (50), and the pair of bent portions (12) extend from both ends of the housing (50).
6. The busbar trunking (100) according to claim 3, characterized in that, A pair of bends (12) of each busbar (10) in the first group of busbars (10) bends away from the second group of busbars (20) along the thickness direction (Z), and a pair of bends (12) of each busbar (20) in the second group of busbars (20) bends away from the first group of busbars (10) along the thickness direction (Z).
7. The busbar trunking (100) according to claim 3, characterized in that, Each of the pair of bent portions (12) includes: An inclined segment (121) is disposed at one end of the straight segment (11) at an angle relative to the length direction (X); and The connecting segment (122) extends outward along the length direction (X) from one end of the inclined segment (121) away from the straight segment (11).
8. The busbar trunking (100) according to claim 3, characterized in that, In the first group of busbars (10), the straight sections (11) of adjacent busbars (10) are in contact with each other, and the connecting sections (122) on the same side of adjacent busbars (10) in the first group of busbars (10) are spaced apart from each other; and The straight sections (11) of adjacent busbars (20) in the second group of busbars (20) are in contact with each other, and the connecting sections (122) on the same side of adjacent busbars (20) in the second group of busbars (20) are spaced apart from each other.
9. The busbar trunking (100) according to claim 7, characterized in that, Each of the first group of busbars (10) and the second group of busbars (20) is further provided with a pair of third insulating members (60), each of the pair of third insulating members (60) wrapping the corresponding inclined segment (121).
10. The busbar trunking (100) according to claim 9, characterized in that, The pair of third insulating members (60) also each wrap a portion of the corresponding connecting segment (122) and a portion of the straight segment (11).
11. The busbar trunking (100) according to claim 9, characterized in that, The third insulating element (60) includes insulating tape.
12. The busbar trunking (100) according to claim 1, characterized in that, The busbar trunking (100) has one or more sets of busbar assemblies (80) arranged in the width direction (Y). The busbar assembly (80) includes the first set of busbars (10), the first insulating member (30), the second set of busbars (20) and the second insulating member (40).