Busbar system

Abstract

The invention relates to a busbar system. Comprising a main busbar assembly, the main busbar assembly comprises a busbar connecting piece and a plurality of special-shaped busbars, the plurality of special-shaped busbars are arranged in parallel and are connected with one another through the busbar connecting piece, first surfaces of the plurality of special-shaped busbars are located on the same plane and form a lap joint surface, and the first surfaces are planes; the connecting busbar is attached to the lap joint face and fixedly connected with the main busbar assembly through the busbar fixing piece, and the multiple special-shaped busbars are located between the connecting busbar and the busbar connecting piece. The busbar system provided by the invention has the advantages of excellent electrical contact, good heat dissipation effect, small weight and size, low cost and more convenience in installation and maintenance, and is suitable for application in high-current and complex environments.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a busbar system. Background Art

[0002] The busbar is one of the core components of the power distribution system, used to conduct current and distribute electrical energy. The copper busbar with a rectangular cross section is the most widely used type of busbar in the electrical industry. When this type of copper busbar is used to form a busbar, it needs to be fixed according to the size of the lap bar of different specifications. When it is used in the main busbar of the power distribution cabinet, the position of the opening must correspond to the branch lap bar. The design and installation accuracy of the structural copper busbar are very high. Once there is a deviation, the entire busbar will be scrapped, which will not only affect production efficiency but also cause cost waste.

[0003] On the other hand, the current carrying capacity of a single rectangular copper busbar is limited. If the current carrying capacity needs to be increased, multiple pieces need to be stacked in the horizontal direction. The more pieces there are, the larger the phase spacing is required, which affects the spatial layout of the busbar room. The thickness of a single copper busbar is spaced between the copper bars for easy overlap. This way of stacking copper bars is not conducive to the heat dissipation of the copper bars. The more pieces there are, the greater the derating factor is, and the more copper bars are used, which is not only not conducive to heat dissipation, but also leads to an increase in the volume and cost of the busbar. Summary of the invention

[0004] Based on this, it is necessary to provide a busbar system that can reduce the volume and improve the heat dissipation effect in order to solve the problem that the existing busbar is large in volume and has poor heat dissipation effect.

[0005] A busbar system, comprising:

[0006] A main busbar assembly comprises a busbar connector and a plurality of special-shaped busbars, wherein the plurality of special-shaped busbars are arranged in parallel with each other and connected to each other through the busbar connector, wherein first surfaces of the plurality of special-shaped busbars are located on the same plane and constitute a lap joint surface, and the first surface is a plane;

[0007] A connecting busbar is attached to the overlapping surface and is fixedly connected to the main busbar assembly through a busbar fixing piece, and the plurality of special-shaped busbars are located between the connecting busbar and the busbar connector.

[0008] In one embodiment, the second surfaces of the plurality of special-shaped busbars are arranged parallel to each other, and there is a first gap between the second surfaces of adjacent special-shaped busbars; the first end of the busbar fixing member is fixedly connected to the busbar connecting member, and the second end passes through the first gap and is fixedly connected to the connecting busbar.

[0009] In one embodiment, the fixing member is a bolt or a pin, the busbar connector is provided with a first fixing hole, the lap joint is provided with a second fixing hole, and the fixing member passes through the first fixing hole and the second fixing hole to connect the busbar connector and the lap joint.

[0010] In one embodiment, the busbar connector includes a connector body and a limiting portion, wherein the limiting portion is perpendicular to the connector body and extends in a direction away from the connector body, and a plurality of limiting portions are arranged on the connector body along the arrangement direction of the plurality of special-shaped busbars, and the spacing between every two adjacent limiting portions along the arrangement direction of the special-shaped busbars is the same as the width of the first surface of the special-shaped busbar.

[0011] In one of the embodiments, the connector body is provided with at least two groups of limiting portions along the extension direction of the special-shaped busbar.

[0012] In one of the embodiments, limiting portions are provided on both sides of the first fixing hole along the extending direction of the special-shaped busbar.

[0013] In one of the embodiments, the cross-section of the special-shaped busbar is I-shaped.

[0014] In one of the embodiments, the busbar connector is an integrally formed structure.

[0015] In one of the embodiments, the busbar connector is made of a metal material.

[0016] In one embodiment, the overlapping bar includes a first connecting section, a middle section and a second connecting section, wherein the first connecting section is used to overlap with the main busbar assembly, the second connecting section is parallel to the first connecting section, the middle section is used to connect the first connecting section and the second connecting section, and the first connecting section and the second connecting section are arranged at an angle to the middle section.

[0017] In the above busbar system, the first surfaces of multiple special-shaped busbars are arranged on the same plane and form a unified overlap surface, which can ensure close contact between the connecting busbar and the main busbar assembly. Since the overlap surface is flat and consistent, it can provide a larger and uniform contact area, which can reduce contact resistance, improve current conduction efficiency, and reduce the risk of local heating. One end of the busbar fixing piece is connected to the busbar connector of the main busbar assembly, and the other end is fixedly connected to the connecting busbar through the first gap, providing a stable and firm mechanical connection, which can enable the busbar system to maintain stable electrical contact under vibration or thermal expansion, thereby improving the reliability of electrical contact. The second surfaces of multiple special-shaped busbars are parallel to each other, and the first gap between adjacent busbars provides a channel for air flow and heat exchange, enhancing the natural heat dissipation effect. Through air convection between the gaps, the heat accumulation generated by the busbar when running at high current can be effectively reduced to avoid overheating. Compared with traditional rectangular busbars, the special-shaped busbars are more flexible and diverse in shape, which can reduce the amount of materials and reduce the overall cost while ensuring electrical performance. Connecting multiple special-shaped busbars in parallel can reduce weight by optimizing the cross-sectional shape of the busbars while maintaining or increasing the current carrying capacity of the system. The busbar fixings pass through the gaps between the special-shaped busbars and connect to the connecting busbars, which can reduce additional support structures, simplify the layout of the fixings, and further reduce the overall material cost. The parallel arrangement of the busbars and the adjacent gaps make the busbar assembly more stable, which helps to improve the seismic performance of the system and adapt to applications in high currents and complex environments. The above busbar system has excellent electrical contact, good heat dissipation, small weight and volume, low cost, and more convenient installation and maintenance, and is suitable for applications in high currents and complex environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] FIG1 is a schematic structural diagram of a busbar system provided by an embodiment of the present invention;

[0020] FIG. 2 is a schematic structural diagram of the other side of a busbar system provided by an embodiment of the present invention.

[0021] In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the attached symbols are explained as follows:

[0022] 1: first busbar, 11: first surface, 12: second surface, 2: second busbar, 3: notch, 4: connecting busbar, 41: first connecting section, 42: middle section, 43: second connecting section, 5: busbar fixing member, 51: connecting member body, 52: limiting portion, 6: busbar fixing member. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0029] FIG1 is a schematic diagram of the structure of a busbar system provided by an embodiment of the present invention; FIG2 is a schematic diagram of the structure of the other side of a busbar system provided by an embodiment of the present invention. Referring to FIG1 to FIG2, a busbar system provided by an embodiment of the present invention includes:

[0030] A main busbar assembly comprises a busbar connector and a plurality of special-shaped busbars, wherein the plurality of special-shaped busbars are arranged in parallel with each other and connected to each other through the busbar connector, wherein the first surfaces 11 of the plurality of special-shaped busbars are located on the same plane and constitute a lap joint surface, and the first surface 11 is a plane;

[0031] The connecting busbar 4 is in contact with the overlapping surface and is fixedly connected to the main busbar assembly via a busbar fixing piece 65, and the plurality of special-shaped busbars are located between the connecting busbar 4 and the busbar connector.

[0032] Among them, the main busbar assembly refers to the main conductor used to conduct and distribute electric energy. In the high-power circuit of the distribution cabinet or substation, electric energy can be received from the main power source such as a generator, a transformer or an external power grid, and the electric energy can be distributed to each branch or load. The special-shaped busbar refers to a busbar with a different cross-sectional shape relative to the traditional busbar with a rectangular or circular cross-sectional shape. It can be specially designed to adapt to specific electrical, mechanical or spatial requirements, such as trapezoidal, I-shaped, U-shaped, T-shaped, Z-shaped or L-shaped. Compared with the traditional busbar, the special-shaped busbar uses less material and has a larger heat dissipation area under the same current carrying capacity. As shown in Figure 1, a plurality of special-shaped busbars are arranged in parallel and connected into a whole by a busbar fixing member 65. When the cross-sectional shape of the special-shaped busbar is an I-shaped, the surfaces of the adjacent two special-shaped busbars with grooves are arranged oppositely, and the planes of each special-shaped busbar are located on the same plane, forming a lap joint surface, which is used to connect with the lapped busbar to achieve functions such as confluence. The busbar connector can be as shown in Figures 1 to 2, and a plurality of limit portions 52 extending perpendicularly to the connector body 51 are provided on the connector body 51, and the spacing between adjacent limit portions 52 can be greater than or equal to the width of the first surface 11 of the special-shaped busbar. When the spacing is equal to the width of the first surface 11, the busbar can be clamped between the limit portions 52, and the busbar can be fixed without punching holes. The number of busbar fixings 65 can be set according to the number and strength requirements of the connected special-shaped busbars. The connecting busbar 4 refers to a component used to connect the main busbar assembly and transmit electrical energy from the main busbar assembly to each branch or equipment. The connecting busbar 4 can be as shown in Figures 1 to 2, and is a metal plate or strip structure made of a material with good electrical conductivity. The connecting busbar 4 is fixedly connected to the main busbar assembly through the busbar fixing 65, and a plurality of special-shaped busbars are located between the connecting busbar 4 and the busbar connector, and can clamp the main busbar assembly together with the busbar fixing 65 while forming an electrical connection with the main busbar assembly, so that the connection with the main busbar is more reliable. The multiple special-shaped busbars of the above busbar system are parallel to each other and located in the same vertical plane to form the main busbar, which can increase the current carrying capacity of the main busbar without affecting the depth of the cabinet, solidify the main busbar position and standardize the busbar solution, and improve the degree of product standardization.

[0033] In the above busbar system, the first surfaces 11 of multiple special-shaped busbars are arranged on the same plane and form a unified overlap surface, which can ensure the close contact between the connecting busbar 4 and the main busbar assembly. Since the overlap surface is flat and consistent, it can provide a larger and uniform contact area, which can reduce the contact resistance, improve the current conduction efficiency, and reduce the risk of local heating. One end of the busbar fixing member 65 is connected to the busbar connector of the main busbar assembly, and the other end is fixedly connected to the connecting busbar 4 through the first gap, providing a stable and firm mechanical connection, which can enable the busbar system to maintain stable electrical contact under vibration or thermal expansion, thereby improving the reliability of electrical contact. The second surfaces 12 of multiple special-shaped busbars are parallel to each other, and the first gap between adjacent busbars provides a channel for air flow and heat exchange, enhances the natural heat dissipation effect, and through air convection between the gaps, it can effectively reduce the heat accumulation generated by the busbar when running at a high current to avoid overheating. Compared with the traditional rectangular busbar, the special-shaped busbar has a more flexible and diverse shape, which can reduce the amount of materials and reduce the overall cost while ensuring electrical performance. Connecting multiple special-shaped busbars in parallel can reduce weight by optimizing the cross-sectional shape of the busbars while maintaining or increasing the current carrying capacity of the system. The busbar fixings 65 pass through the gaps between the special-shaped busbars and are connected to the connecting busbar 4, which can reduce additional support structures, simplify the layout of the fixings, and further reduce the overall material cost. The parallel arrangement of the busbars and the adjacent gaps make the busbar assembly more stable, which helps to improve the seismic performance of the system and adapt to applications in high currents and complex environments. The above busbar system has excellent electrical contact, good heat dissipation, small weight and volume, low cost, and more convenient installation and maintenance, and is suitable for applications in high currents and complex environments.

[0034] In an exemplary embodiment, the second surfaces 12 of the plurality of special-shaped busbars are arranged parallel to each other, and there is a first gap between the second surfaces 12 of adjacent special-shaped busbars; the first end of the busbar fixing member 65 is fixedly connected to the busbar connecting member, and the second end passes through the first gap and is fixedly connected to the connecting busbar 4.

[0035] As shown in Figures 1 to 2, the second surfaces 12 of adjacent special-shaped busbars are arranged relatively to each other and there is a first gap of a certain width between the two. The setting of the gap can enhance the convective heat dissipation effect between the busbars, especially for the special-shaped busbars. The second surface 12 is not a plane, which can make the heat dissipation area larger. A slot 3 can also be formed between adjacent busbars. The slot 3 can make the fixing position between the special-shaped busbars more flexible, without the need for opening holes, and can be connected and fixed without being affected by the left and right positions of the overlapping copper busbars.

[0036] In an exemplary embodiment, the fixing member is a bolt or a pin, a first fixing hole is formed on the busbar connector, a second fixing hole is formed on the lap joint, and the fixing member passes through the first fixing hole and the second fixing hole to connect the busbar connector and the lap joint.

[0037] In an exemplary embodiment, the busbar connector includes a connector body 51 and a limiting portion 52, wherein the limiting portion 52 is perpendicular to the connector body 51 and extends in a direction away from the connector body 51, and a plurality of limiting portions 52 are arranged on the connector body 51 along the arrangement direction of the plurality of special-shaped busbars, and the spacing between every two adjacent limiting portions 52 along the arrangement direction of the special-shaped busbars is the same as the width of the first surface 11 of the special-shaped busbar.

[0038] In an exemplary embodiment, the connector body 51 is provided with at least two groups of stoppers 52 along the extension direction of the special-shaped busbar. Multiple groups of stoppers 52 can prevent the special-shaped busbar from bending and deforming, thereby improving the reliability of the busbar system.

[0039] In an exemplary embodiment, both sides of the first fixing hole along the extension direction of the special-shaped busbar are provided with limiting portions 52. Opening a hole in the connector will change the stress distribution of the material, and stress concentration is likely to occur around the first fixing hole, reducing the bearing capacity of this area. Therefore, providing limiting portions 52 on both sides of the first fixing hole can improve the strength of this area, reduce the load on the fixing hole area, and reduce the possibility of deformation or damage around the fixing hole.

[0040] In an exemplary embodiment, the cross-section of the special-shaped busbar is an I-shaped one. The upper and lower flanges of the I-shaped structure provide a large section inertia moment, have high bending and torsional strength, and can withstand large mechanical loads. Therefore, using multiple I-shaped busbars to form a main busbar assembly can make the busbar system more solid and stable in a high-load environment and less prone to deformation. In addition, the upper and lower flanges of the I-shaped busbar increase the surface area, allowing it to dissipate heat more effectively. Compared with a rectangular cross-section, the heat dissipation path is longer, and the heat generated during the current conduction process can be quickly dissipated, reducing the risk of system overheating, improving the reliability of equipment operation, and being able to effectively dissipate heat when the current density is high.

[0041] In an exemplary embodiment, the busbar connector is an integrally formed structure. An integrally formed structure refers to a component or assembly made into a single entity through a one-time forming process, such as stamping, die-casting or extrusion molding, etc. The integrally formed structure has no additional connection points, can improve electrical performance and reduce energy loss, and has a compact structure, saves space, makes the wiring inside the distribution cabinet or equipment more concise and neat, and helps to reduce the overall size.

[0042] In an exemplary embodiment, the busbar connector is made of a metal material, which can be copper or aluminum, etc., which can effectively transmit large currents and reduce power loss. The copper or aluminum components made by the one-piece molding process have high mechanical strength, can withstand large mechanical stress and vibration, are not easy to break or deform, and can improve the stability and reliability of the equipment in long-term use.

[0043] In an exemplary embodiment, the lap bar includes a first connection section 41, a middle section 42 and a second connection section 43, wherein the first connection section 41 is used to overlap with the main busbar assembly, the second connection section 43 is parallel to the first connection section 41, the middle section 42 is used to connect the first connection section 41 and the second connection section 43, and the first connection section 41 and the second connection section 43 are arranged at an angle to the middle section 42. As shown in Figures 1 and 2, the first connection section 41 and the second connection section 43 of the lap bar are parallel to each other, wherein the first connection section 41 overlaps with the busbar assembly, and the second connection section 43 is parallel to the first connection section 41, which facilitates wiring along the arrangement direction of the special-shaped busbars in the main busbar assembly, so that the circuit components can be distributed along the extension direction of the main busbar, reducing the thickness of the busbar system. The middle section 42 is used to connect the first connecting section 41 and the second connecting section 43, so that the first connecting section 41 and the second connecting section 43 have a certain distance in the direction perpendicular to the two, which is convenient for connecting circuits or other electronic components. The length of the middle section 42 and the angle with the first connecting section 41 and the second connecting section 43 can be set according to actual needs. The first connecting section 41, the middle section 42 and the second connecting section 43 can be bent from connecting bars made of copper or other metals.

[0044] In addition to the above components, the busbar system may also include components such as an insulating layer, a supporting and fixing structure, connectors, a mutual inductor, a grounding system, and a heat dissipation structure. Among them, the busbar system must have an insulating layer to prevent short circuits and electric shock accidents. The insulating layer refers to a material layer made of heat shrink tubing, coating or other insulating materials and covered or wrapped on the surface of the busbar to isolate the electrical contact between busbars of different potentials or between the busbar and the ground to prevent short circuits and electric shock accidents. The insulating material may include one or more of polyvinyl chloride, polyethylene or epoxy resin. The supporting and fixing structure is a structure used to support and fix the busbar, keep it stable and prevent vibration or displacement, and may include a busbar clamp and a supporting frame, wherein the busbar clamp is made of a material with high temperature resistance, arc resistance and high mechanical strength, such as glass fiber reinforced plastic or ceramic material, and the supporting frame can be made of a material with high mechanical strength. When a metal frame is used, the frame also needs to be grounded through a grounding piece to prevent leakage. Connectors may include bolts or washers, etc., and the contact surface may be silver-plated or tin-plated to ensure good electrical contact. The transformer may include a current transformer or a voltage transformer, which is used to monitor the current and voltage levels of the busbar, respectively. The grounding system may include a grounding busbar, which is used to achieve the grounding connection of the busbar system to improve the safety of the equipment. The heat dissipation structure may include a ventilation device or a heat sink.

[0045] In an exemplary embodiment, a busbar system is provided, including a first busbar and a second busbar, a notch 3 formed on a vertical plane by the first busbar and the second busbar, a connecting busbar 4 overlapped with the first busbar and the second busbar, and a fixing member 5 for fixing multiple busbars. It is realized that it can be connected and fixed without opening holes and is not affected by the left and right positions of the overlapping copper bars. The busbar fixing member fixes multiple busbars within a 90° antenna angle and connects and fixes them with the connecting busbar to ensure the strength of the multiple busbars. The first busbar and the second busbar are parallel to each other and are located in the same vertical plane; and multiple busbars can be added to form multiple notches. Multiple busbars and multiple connecting busbars in the same vertical plane can be fixed front and back; the busbar fixing scheme is more flexible. The busbar system composed of multiple busbars can achieve multiple current coverage; achieve a fixed main busbar position (phase spacing, front and back relative position in the distribution cabinet), and replace multiple rectangular busbar specifications with one specification busbar to improve the degree of product standardization. The "I"-shaped modular busbar used can control the busbar width while increasing the current carrying capacity of a single busbar. In the limited busbar room of the distribution cabinet, multiple busbars can be stacked in the vertical direction to form a busbar system with various large current specifications. The traditional front-to-back layout of the busbar is changed to reduce the heat dissipation effect between the buses. The current carrying capacity under the same cross-section is much higher than that of the rectangular copper busbar. The higher the current carrying capacity demand, the more obvious the advantage. This achieves the purpose of reducing the use of copper busbars and reducing the overall manufacturing cost of the product.

[0046] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A busbar system, characterized in that: The busbar system comprises: A main busbar assembly comprises a busbar connector and a plurality of special-shaped busbars, wherein the plurality of special-shaped busbars are arranged in parallel with each other and connected to each other through the busbar connector, wherein first surfaces of the plurality of special-shaped busbars are located on the same plane and constitute a lap joint surface, and the first surface is a plane; A connecting busbar is attached to the overlapping surface and is fixedly connected to the main busbar assembly through a busbar fixing piece, and the plurality of special-shaped busbars are located between the connecting busbar and the busbar connector.

2. The busbar system according to claim 1, characterized in that: The second surfaces of the plurality of special-shaped busbars are arranged parallel to each other, and a first gap is provided between the second surfaces of adjacent special-shaped busbars; the first end of the busbar fixing member is fixedly connected to the busbar connecting member, and the second end passes through the first gap and is fixedly connected to the connecting busbar.

3. The busbar system according to claim 1, characterized in that: The fixing member is a bolt or a pin, the busbar connector is provided with a first fixing hole, the lap bar is provided with a second fixing hole, and the fixing member passes through the first fixing hole and the second fixing hole to connect the busbar connector and the lap bar.

4. The busbar system according to claim 1, characterized in that: The busbar connector includes a connector body and a limiting portion, wherein the limiting portion is perpendicular to the connector body and extends in a direction away from the connector body, and a plurality of limiting portions are arranged on the connector body along the arrangement direction of the plurality of special-shaped busbars, and a spacing between every two adjacent limiting portions along the arrangement direction of the special-shaped busbars is the same as a width of a first surface of the special-shaped busbar.

5. The busbar system according to claim 4, characterized in that: The connector body is provided with at least two groups of limiting parts along the extension direction of the special-shaped busbar.

6. The busbar system according to claim 3, characterized in that: Limiting portions are provided on both sides of the first fixing hole along the extending direction of the special-shaped busbar.

7. The busbar system according to claim 1, characterized in that: The cross section of the special-shaped busbar is an I-shape.

8. The busbar system according to claim 1, characterized in that: The busbar connector is an integrally formed structure.

9. The busbar system according to claim 1, characterized in that: The busbar connector is made of metal materials.

10. The busbar system according to claim 1, characterized in that: The overlapping bar includes a first connecting section, a middle section and a second connecting section, wherein the first connecting section is used to overlap with the main busbar assembly, the second connecting section is parallel to the first connecting section, the middle section is used to connect the first connecting section and the second connecting section, and the first connecting section and the second connecting section are arranged at an angle to the middle section.

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