Busbar connection assembly, busbar assembly, and busbar case assembly for connecting busbars

Abstract

Embodiments of the present disclosure provide a busbar connection assembly, a busbar assembly, and a busbar case assembly for connecting busbars, the busbar connection assembly comprising a pair of conductive plates suitable for clamping and connecting a first busbar and a second busbar that are separated from each other and extend along the same extending direction, each conductive plate comprising a body, a pair of coupling portions located at least at the extending end of the body and bonded to the body by solid-liquid or solid-solid bonding using the same material as the surface of the connection portion of the first busbar and the second busbar, a positioning hole located in the center of the extending direction of the body, and a locking member bonded to the positioning hole and locking the first busbar and the second busbar to electrically connect them by pressing the pair of coupling portions against the surface of the connection portion of the first busbar and the second busbar, respectively. This makes it possible to reduce the contact resistance of the electrical contact of the busbars and improve the stability of the electrical contact.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure generally relate to the technical field of power transmission and distribution equipment, and more particularly to a busbar connection assembly, a busbar assembly, and a busbar case assembly for connecting busbars.

Background Art

[0002] Bus ducts are widely used power transmission equipment, mainly used for power distribution in power systems, factory sites, etc., that is, to achieve an orderly and safe transmission of electric power. Each bus duct is connected by a connector.

[0003] However, during operation, the bus duct and the connector have a relatively large contact resistance, resulting in excessively high temperatures in the contact areas (such as parts like the ends of the bus duct, the connector, and the connection points of the insertion ports of the connector bus duct). That is, the electrical connection between the conventional bus duct and the connector results in a relatively large contact resistance, which not only affects the operating efficiency of the power system but also poses a potential threat to the safety of the power system.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The objective of the present disclosure is to provide a busbar connection assembly, a busbar assembly, and a busbar case assembly for connecting busbars to at least partially solve the above problems and / or other potential problems existing in conventional busbar connections.

Means for Solving the Problems

[0005] A first aspect of the present disclosure provides a busbar connection assembly for connecting busbars. The busbar connection assembly includes a pair of conductive plates suitable for clamping and connecting a first busbar and a second busbar that are separated from each other and extend along the same extending direction, each conductive plate of the pair of conductive plates including a body configured to overlap with connection portions located at the adjacent ends of the first busbar and the second busbar, a pair of connection portions located at least at the extending end of the body and each made of the same material as the surfaces of the connection portions of the first busbar and the second busbar and connected to the body by solid-liquid or solid-solid bonding, a positioning hole formed in the body and located in the center of the extending direction of the body, and a locking member connected to the positioning hole and pressing the pair of connection portions against the surfaces of the connection portions of the first busbar and the second busbar to lock and electrically connect the first busbar and the second busbar.

[0006] In the embodiments of this disclosure, by overlapping the main body, the first busbar, and the connection portion of the second busbar end, a cover for the connection portion of the main body can be secured, and a robust support base can be formed.

[0007] At the same time, the joints are located at the ends of the main body in the direction of extension, and the pair of joints are made of the same material as the first busbar and the second busbar joint, respectively, and are bonded to the main body by solid-liquid or solid-solid bonds. This ensures good contact between the joints and the surface of the busbar, and ensures the formation of a connection that forms low resistance.

[0008] By coupling the locking member to the positioning hole, the pair of coupling portions are pressed against the connection surfaces of the first and second busbars, respectively, thereby achieving an electrical connection for the lock between the first and second busbars. This effectively reduces contact resistance, improves electrical transmission performance, and lowers the temperature of the contact area. Other advantages are described below in conjunction with the relevant embodiments.

[0009] In some embodiments, the extending length of each of the pair of connectors in the extending direction is equal to the extending length of the connector of the first busbar or the second busbar.

[0010] In some embodiments, the extension length of the conductive plate of the joint along its extension direction is at least three times the sum of the thicknesses of the main body and the joint.

[0011] In some embodiments, the thickness of the joint is less than or equal to the thickness of the main body.

[0012] In some embodiments, the conductive plate further includes a plurality of stopper blocks configured to protrude from the periphery, approaching the positioning holes of the main body.

[0013] In some embodiments, chamfers are formed on the ends of the pair of conductive plates in the direction of extension.

[0014] A second aspect of the present disclosure provides a busbar assembly comprising a busbar connection assembly according to the first aspect and a group of busbars comprising at least a first busbar and a second busbar extending along the same extending direction, wherein the first busbar and the second busbar each include a connecting portion and a power transmission portion for power transmission, and the connecting portion comprises a group of busbars formed at the ends where the power transmission portions of the first busbar and the second busbar approach each other, wherein the connecting portion is sandwiched between the connecting portions of conductive plates of the busbar connection assembly and is suitable for establishing an electrical connection between the first busbar and the second busbar.

[0015] In some embodiments, the connection is integrally formed at the ends of the power transmission sections of the first busbar and the second busbar that are close to each other by solid-liquid bonding or solid-solid bonding.

[0016] In some embodiments, the length of the connection in the extending direction is equal to the length of the joint in the extending direction.

[0017] In some embodiments, the connector is positioned along the entire side of the first or second busbar that is close to the conductive plate, and is electrically coupled to the conductive plate.

[0018] A third aspect of this disclosure provides a busbar case assembly comprising a busbar case and a plurality of busbar assemblies according to the second aspect, which are arranged in the busbar case.

[0019] In some embodiments, the busbar case assembly further includes at least insulating spacers positioned between the conductive plates of the busbar connection assemblies of multiple busbar assemblies.

[0020] It should be understood that the content described in this section is not intended to limit any essential or important features of the embodiments of this disclosure, nor to limit the scope of this disclosure. Other features of this disclosure will be readily apparent from the following description.

[0021] The above and other features, advantages, and aspects of each embodiment of the present disclosure will become more apparent by referring to the drawings and the following detailed description. In the drawings, the same or similar reference numerals represent the same or similar elements. [Brief explanation of the drawing]

[0022] [Figure 1] The diagrams show schematic structures of busbar connection assemblies that lock busbars according to some embodiments of this disclosure. [Figure 2] The diagrams show schematic structures of busbar connection assemblies detaching from busbars according to some embodiments of this disclosure. [Figure 3] The following are cross-sectional views showing a busbar connection assembly detached from a busbar according to some embodiments of the present disclosure. [Figure 4] A schematic diagram of a structure in which a pair of busbars are inserted between a pair of conductive plates according to some embodiments of this disclosure is shown. [Figure 5]Shows a schematic diagram of the structure of a conductive plate according to some embodiments of the present disclosure. [Figure 6] Shows a schematic diagram of the structure of a bus bar according to some embodiments of the present disclosure. [Figure 7] Shows a schematic diagram of the structure of a bus bar according to some embodiments of the present disclosure.

Modes for Carrying Out the Invention

[0023] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the drawings. Although some embodiments of the present disclosure are shown in the accompanying drawings, the present disclosure can be realized in various forms and should not be construed as being limited to the embodiments described herein. Rather, it should be understood that these embodiments are provided to more fully and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the protection scope of the present disclosure.

[0024] In the description of the embodiments of the present disclosure, terms such as "including" and similar terms should be understood as open inclusion, that is, "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "an embodiment" or "this embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions may be included hereinafter. Terms such as "first", "second", etc. can refer to different or the same objects. Other explicit and implicit definitions may be included hereinafter.

[0025] As briefly mentioned earlier, the high contact resistance of the contact area leads to a problem of excessively high temperatures. Specifically, in conventional bus ducts (hereinafter also called bus bar case assemblies), in the low-voltage power transmission and distribution industry, the inside of the bus duct is generally divided into multiple independent regions or strips, which are used to transmit power of different phases. Each bus duct is connected to the others by connectors (hereinafter also called bus bar connection assemblies).

[0026] However, during operation, the continuous current flowing through the bus duct and connector generates relatively high contact resistance in the contact area, resulting in excessively high temperatures in the contact area between the bus duct and connector. For example, for aluminum busbars in conventional bus ducts, there are generally two common types of contact areas. One uses tinned aluminum conductors, and the other has additional contacts welded to the ends of the aluminum conductors.

[0027] Due to the flexibility of tin, repeated insertion and removal of tin-plated aluminum conductors can easily cause the tin layer to detach, resulting in direct aluminum-to-aluminum electrical contact in the contact area after the tin layer has been removed. Because aluminum has relatively high contact resistance, in such cases the contact resistance in the contact area increases significantly, and the temperature of the seal area rises accordingly, negatively impacting the normal operation and lifespan of the bus duct.

[0028] In another case, an additional contact (e.g., a copper contact) is welded to the end of an aluminum conductor to form an aluminum busbar. During operation of the bus duct and connector, galvanic corrosion occurs due to contact between the copper and aluminum. This means that the contact surface between the contact and the aluminum conductor is only the aluminum conductor, resulting in very high contact resistance between the contact and the aluminum conductor. Spot welding is generally used, and because the contact area between the two conductive materials is relatively small, it is unfavorable for electrical contact and increases contact resistance. As a result, the temperature of the contact area rises accordingly, significantly affecting the normal operation and service life of the bus duct.

[0029] An increase in the temperature of the contact area has multiple effects on the bus duct and the entire power transmission and distribution system. First, high temperatures contribute to increased contact resistance, leading to increased power consumption, affecting the efficient use of electrical energy, and impacting the economics of the power system. Second, excessively high temperatures can cause thermal stress on the bus duct itself and its surrounding structures, potentially leading to deterioration and reduced durability of the bus duct, which in turn can cause failures in the distribution lines and even fires, affecting the safe operation of the power system and impacting the stability and reliability of the entire system. Furthermore, the presence of contact resistance affects the transmission of electrical energy, increasing power loss and thus impacting the efficiency of the power system.

[0030] To solve, or at least partially solve, the above-mentioned problems or other potential problems of conventional busbar connections, embodiments of the present disclosure provide busbar connection assemblies, busbar assemblies and busbar case assembly solutions for connecting busbars. According to the solutions of embodiments of the present disclosure, a busbar connection assembly includes a pair of conductive plates and a locking member for clamping and connecting a first busbar and a second busbar that are separated from each other and oriented along the same direction of extension.

[0031] Furthermore, each conductive plate includes three parts: a main body, a pair of coupling parts, and a positioning hole. By overlapping the main body with the connection parts at the ends of the first and second busbars, a cover for the connection parts of the main body is ensured, forming a robust support base. The coupling parts are located in the extending direction of the main body and at its ends. The coupling parts are made of the same material as the connection parts between the first and second busbars and are bonded to the main body by solid-liquid or solid-solid bonding. This ensures good contact between the coupling parts and the busbar surfaces, resulting in a low-resistance connection. Simultaneously, the positioning hole is formed in the main body and located in the central part in the extending direction of the main body. The locking member is coupled to the positioning hole and achieves electrical connection of the lock between the first and second busbars by pressing the pair of coupling parts against the surfaces of the connection parts of the first and second busbars, respectively.

[0032] This makes it possible to avoid or reduce contact resistance, effectively prevent excessively high temperatures, extend the lifespan of the bus duct, ensure the stability and reliability of the system, and improve the overall efficiency of the power system.

[0033] The following describes an exemplary structure in which a busbar case assembly (i.e., the bus duct described above) is connected by a busbar connection assembly 110 (i.e., the connector described above), linking Figures 1 to 7. In the power transmission and distribution industry, the busbar connection assembly 110 is a component for connecting two bus ducts.

[0034] Specifically, the busbar connection assembly 110 is made of metallic copper, copper-aluminum composite material, or any other suitable material, and has left and right ends in the extending direction, each capable of contacting the ends of two busbars. Specifically, the first busbar of the two busbars to be connected (for example, extending along the same direction) is inserted into one end of the busbar connection assembly 110 to ensure good electrical contact, and then one end of the second busbar is connected to the other end of the busbar connection assembly 110. This ensures that the two busbars are reliably electrically connected. This not only ensures electrical contact between the busbars of the busbar connection assembly 110, but also ensures the stability of the physical connection, thereby ensuring the safety and efficiency of the power system.

[0035] The following description will primarily focus on the case where the conductive plate 111 and busbars are made of copper-aluminum composite material. The same principles apply to the cases where the conductive plate is used for busbars and connectors in other bus ducts; therefore, further descriptions of these cases will be omitted. For convenience of description, the busbar case assembly in the embodiments of this disclosure includes multiple busbar assemblies, which will be described later.

[0036] As shown in Figures 1 to 7, the busbar case assembly according to the embodiment of the present disclosure comprises a busbar case 120 and a plurality of busbar assemblies.

[0037] Specifically, the busbar case 120 is a robust and highly protective container, generally made of fire-resistant and insulating materials, such as plastic or metal. The size and shape of the busbar case 120 are determined by the number and layout of the busbars to be installed. The busbar case 120 can adapt to various environmental conditions and have sufficient strength to protect the internal electrical equipment from environmental influences.

[0038] The multiple busbar assemblies are then placed inside the busbar case 120. Each busbar assembly is secured inside the busbar case 120 to ensure stability during current transmission. At the same time, the busbar case 120 allows for easy opening, inspection, and maintenance of the busbar assemblies.

[0039] Therefore, the busbar case assembly can protect the busbar assembly and ensure stable current transmission, thereby ensuring the stable operation of the power system. Multiple sets of busbar assemblies can be housed in the busbar case assembly. Each set of busbar assemblies can correspond to one phase in the circuit.

[0040] The following describes the busbar assembly and busbar connection assembly 110 by linking Figures 1 to 7. The busbar assembly according to the embodiment of the present disclosure comprises, as a whole, a busbar connection assembly 110 and a group of busbars. The group of busbars may include at least two busbars, each of which passes through the busbar connection assembly 110 to establish an electrical connection.

[0041] The following primarily describes how a pair of busbars within a busbar group achieve electrical connection through a single busbar connection assembly. For the sake of clarity, the pair of busbars to be connected includes a first busbar 121 and a second busbar 122. The first busbar 121 and the second busbar 122 each include a connector 1211 and a power transmission unit for transmitting power. The power transmission unit is the main component of either the first busbar 121 or the second busbar 122, and its extension is essentially the extension of either the first busbar 121 or the second busbar 122. The connector 1211 and the power transmission unit can be integrally stroked from the same material. In some alternative embodiments, the power transmission unit may be made of a first material, such as aluminum or an aluminum alloy, and the connector 1211 may be made of a second material, such as copper or a copper alloy. The following description of the concept according to this disclosure will primarily use the example of using different materials for the connection section 1211 and the power transmission section. Since the same principles apply to other situations, descriptions of those situations will be omitted below.

[0042] In such embodiments, the connection portion 1211 is integrally formed at the ends where the first busbar 121 and the second busbar 122 approach each other by solid-liquid or solid-solid bonding. This bonding method ensures the strength and conductivity of the busbars while making the connection between the busbars stronger and more secure. Furthermore, the arrangement of the busbar assemblies, typically in parallel or staggered configurations, depends on the complexity of the power system and the required current distribution method.

[0043] Furthermore, solid-liquid bonding is achieved through solid-liquid casting and rolling composite molding technology. This is a molding technology that uses semi-solid metals for continuous casting and rolling. It is intended to achieve an organic fusion of solid and liquid metals, improving the overall performance of the material, including mechanical properties, durability, and stability.

[0044] Specifically, the metal is cast in a semi-solid state. Unlike conventional all-solid or all-liquid casting, the metal in this state is fluid and has a certain degree of shape retention. This semi-solid metal is then directly fed into a continuous rolling mill, and through high-precision pressure and temperature control, the metal material is given ideal mechanical properties and microstructure.

[0045] Compared to conventional molding methods, the solidification process of solid-liquid casting and rolling composite molding technology is easier to control, effectively improving the formability and performance of materials. Furthermore, the direct casting and rolling method reduces process steps, improves production efficiency, and lowers production costs. Finally, such technologies can generally improve the strength and toughness of metallic materials by inducing a transformation of the needle-like structure.

[0046] For example, copper-aluminum eutectic strips were researched and developed based on conventional aluminum strip casting and rolling. They employ a unique solid-liquid casting and rolling composite molding technology. During the process of converting the aluminum liquid from liquid to solid phase, a solid copper strip is synchronously introduced. High-temperature, high-pressure rolling by casting rolls causes co-infiltration of atoms at the interface of the two metals, resulting in crystallization and the formation of a unique copper-aluminum eutectic composite sheet. Compared to copper-aluminum composite sheets produced by conventional cold-rolling, hot-rolling, and explosive-rolling methods, performance in terms of peel strength, load capacity, conductivity, tensile strength, and shear strength is dramatically improved. Currently, it is mainly applied to battery connection exhausts in new energy vehicles.

[0047] Solid-solid bonding technology is also a composite molding technology and is primarily applied to two or more materials with different properties. Such technology is generally used to tightly bond these different materials together to form a composite, which possesses the advantages of each component while avoiding or mitigating their drawbacks.

[0048] Therefore, the connection between the busbars is made robust overall, and current flows seamlessly from the first busbar 121 to the second busbar 122 through the busbar connection assembly 110, thereby enabling power transmission and distribution and power supply to equipment. Furthermore, this connection method ensures the safety and reliability of the connection and enables stable and safe power transmission and distribution by maintaining good performance in all situations of the busbar system.

[0049] In some embodiments, in order to construct a stable and efficient busbar system, the connector 1211 is located on the busbar, is part of the busbar, and is intended to bond with the conductive plate 111 of the busbar connector assembly 110. The connector 1111 of the busbar connector assembly 110, described in detail below, is part of the conductive plate 111 and is used to safely and effectively house and support the busbar connector 1211.

[0050] The following describes a busbar connection assembly 110 according to an embodiment of the present disclosure, in conjunction with Figures 3 to 5. The busbar connection assembly 110 according to an embodiment of the present disclosure comprises a pair of conductive plates 111 and a locking member 112. Specifically, the locking member 112 allows the pair of conductive plates 111 to be connected by clamping a busbar. The first busbar 121 and the second busbar 122 described above can be closely connected by housing a connection portion 1211 on which the busbar is provided. The first busbar 121 and the second busbar 122 extend along the same extending direction, which facilitates the installation and maintenance of the conductive plates 111.

[0051] The locking member 112 is intended to fix and reinforce the connection between the busbars by locking the pair of conductive plates 111. In other words, the locking member 112 allows the pair of conductive plates 111 to be closely pressed against the surface of the connection portion 1211 of the first busbar 121 and the second busbar 122, respectively. This method allows for a close locking of the first busbar 121 and the second busbar 122 while maintaining the smoothness of the conductive path, thereby achieving a stable and reliable electrical connection.

[0052] From the above description, it can be seen that the busbar connection assembly 110 is intended to provide the busbar system with stable and efficient electrical transmission performance. The cooperative use of the conductive plate 111 and the locking member 112 not only ensures that they can closely connect the first busbar 121 and the second busbar 122, but also ensures the smooth transmission of electrical energy in the process, thereby fully meeting the high requirements for safety and stability in power facilities.

[0053] Furthermore, each of the pair of conductive plates 111 includes a main body 1112, a pair of connecting parts 1111, and positioning holes 1113. For example, the main body 1112 is an aluminum conductor, and the connecting parts 1111 are copper conductors. These parts will be described in detail below.

[0054] Specifically, the main body 1112 of the conductive plate 111 may overlap with the connecting portion 1211 located at the mutually adjacent ends of the first busbar 121 and the second busbar 122. In this way, sufficient contact area can be secured during current transmission, improving electrical conductivity, while simultaneously achieving close contact between the conductive plate 111 and the busbars.

[0055] A pair of couplings 1111 are positioned at the extending ends of the main body 1112 and are made of the same material as the surfaces of the couplings 1211 of the first busbar 121 and the second busbar 122. The couplings 1111 are connected to the main body 1112 by solid-liquid or solid-solid bonding. Their contact with the busbars further extends the electrical connectivity between the conductive plate 111 and the busbars. By sandwiching the couplings 1211 between the couplings 1111 of the conductive plate 111 of the busbar connection assembly 110, an electrical connection is established between the first busbar 121 and the second busbar 122.

[0056] Furthermore, the positioning hole 1113 is part of the main body 1112 and is located in the central part in the extending direction of the main body 1112. The positioning hole 1113 effectively enables stable power transmission by reinforcing the structure and electrical connection between the conductive plate 111 and the busbar by allowing the locking member 112 to pass through and be fixed.

[0057] In some embodiments, the connector 1211 is positioned along the entire side surface of the first busbar 121 or the second busbar 122 that is close to the conductive plate 111. This is intended to achieve omnidirectional electrical coupling, i.e., to allow current to be transmitted across the entire contact surface between the connector 1211 and the conductive plate 111. This ensures higher conductivity because it provides a larger contact area, thereby keeping contact resistance low and providing a stable and efficient current transmission path.

[0058] Furthermore, since the connection portion 1211 covers the entire side surface that comes into contact with the conductive plate 111 of the busbar, it actually provides protection to the conductive part of the busbar, preventing wear and deterioration during long-term use.

[0059] In short, by positioning the connection portion 1211 along the entire side surface that approaches the conductive plate 111 of the first busbar 121 or the second busbar 122, the operational efficiency of the busbar system is improved, and the service life and reliability of the busbars are increased.

[0060] In actual use, when current flows through a busbar, it passes through the connector 1211, is transmitted through the connector 1211 to the busbar connection assembly 110, and then flows to other busbars through the busbar connection assembly 110. Since the connector 1211 is positioned along the entire side surface that is close to the conductive plate 111, it ensures that the conductive plate 111 can receive and transmit the current from the busbars uniformly, thus avoiding problems of heat concentration and overcurrent.

[0061] In some embodiments, a pair of couplings 1111 of the conductive plate 111 can effectively realize an electrical connection between the conductive plate 111 and the busbar. The extending length of each coupling 1111 in the extending direction is equal to the extending length of the coupling 1211 of the first busbar 121 or the second busbar 122.

[0062] Specifically, equal extension lengths mean a larger contact area, which significantly improves electrical conductivity because resistance often decreases with increasing contact area. Secondly, equal extension lengths help ensure tight contact between the coupling 1111 and the busbar connection 1211, thus effectively improving system stability and effectively reducing voltage fluctuations due to poor contact.

[0063] Furthermore, since their lengths are the same, they only need to be aligned to a predetermined position during installation, and there is no misalignment due to length issues. However, this also makes later maintenance more convenient, because the position and connection length of all connection points 1211 are the same, making it difficult to ignore any single part during inspection and repair.

[0064] In some embodiments, the extension length of the conductive plate 111 of the joint 1111 along the extending direction is at least three times the sum of the thicknesses of the main body 1112 and the joint 1111. For example, as shown in Figure 4, a is the thickness of the main body 1112 that connects to the joint 1111, b is the thickness of the joint 1111, and c is the extension length,

number

[0065] Specifically, this arrangement ensures sufficient contact area between the coupling 1111 and the busbar, thereby effectively reducing contact resistance and improving conductivity. Conductivity and current transmission stability are often directly related to contact area. A larger contact area can reduce heat buildup while simultaneously reducing contact resistance and energy loss.

[0066] Furthermore, the length of the joint 1111 is at least three times the thickness of the main body 1112 and the joint 1111, providing more safety fault tolerance space. For example, even if there is displacement or slight deformation of the busbar, this length ensures sufficient contact between the joint 1111 and the busbar, reducing safety concerns due to poor contact between them.

[0067] Furthermore, a longer coupling length between the coupling portion 1111 and the connecting portion is also advantageous in enhancing the structural stability and durability of the conductive plate 111. Because the coupling portion 1111 is relatively long, it can effectively apply and distribute pressure, thereby reducing damage to the coupling portion 1111 or the main body 1112.

[0068] In summary, the extension length of the conductive plate 111 of the joint 1111 along its extension direction is at least three times the sum of the thicknesses of the main body 1112 and the joint 1111, which allows for a sufficient balance between the demands for conductive performance, safety, and stability, while simultaneously improving the overall performance and safety of the power facility.

[0069] In some embodiments, keeping the thickness of the joint 1111 within a range less than or equal to the thickness of the main body 1112 on which the joint 1111 is located helps to improve the performance of the conductive plate 111, increase the stability of the busbar connection assembly 110, and reduce maintenance costs.

[0070] In some embodiments, the conductive plate 111 is configured to protrude from the periphery, approaching the positioning hole 1113 of the main body 1112. The stopper block 1114 is to ensure that the connection portion 1211 and the coupling portion 1111 are aligned after the busbars are inserted into the pair of conductive plates 111.

[0071] Specifically, the stopper block 1114 can help the busbar find the correct path and alignment point. When the busbar needs to be inserted into the conductive plate 111, the stopper block 1114 can prevent the busbar from being inserted too deeply or at an angle, ensuring the correct alignment of the connection portion 1211 and the coupling portion 1111. By simply pressing the busbar against the stopper block 1114, the correct joining of the conductive plate 111 can be achieved by following the guide of the shape of the stopper block 1114.

[0072] Furthermore, the stopper block 1114 also provides protection. In actual operation, excessive force may be applied when the busbar is inserted into the conductive plate 111, potentially damaging or deforming the connection 1211 and coupling 1111. However, the stopper block 1114 can effectively prevent such occurrences, as it can withstand the insertion pressure and protect the connection 1211 and coupling 1111 from damage.

[0073] Furthermore, the stopper block 1114 also helps maintain connection stability. By aligning the connection portion 1211 and the coupling portion 1111 after the busbar is inserted into the conductive plate 111, the position is effectively locked, preventing connection instability due to busbar movement or vibration during power transmission, and further ensuring the stability and safety of power transmission.

[0074] Therefore, the stopper block 1114 within the conductive plate 111 ensures that the busbar is accurately and stably inserted into the conductive plate 111, thereby effectively improving the performance of the busbar connection assembly 110.

[0075] In some embodiments, chamfers are formed on the ends of the pair of conductive plates 111 in the extending direction, which improves the convenience of connecting and using the conductive plates 111, enhances the safety of the conductive plates 111, and extends their service life.

[0076] Chamfering is always used in construction to treat the edges of objects, and by smoothly transitioning the edge from one surface to another, it is possible to avoid the formation of such sharp edges. Specifically, by chamfering the ends of a pair of conductive plates 111 in the extending direction, the process of butting the conductive plates 111 together becomes smoother, and stiffness and snagging during insertion caused by the sharpness of the ends can be reduced. This not only avoids damage to the interface that may occur during insertion and removal, but also makes insertion and removal easier, improving the user experience.

[0077] At the same time, chamfered edges enhance safety during use. Sharp edges can easily injure the user or other equipment during use, and the placement of chamfers significantly reduces this problem, ensuring the safety of both the user and the equipment.

[0078] Furthermore, chamfering also helps to extend the durability of the conductive plate 111. By chamfering the interface, the stress distribution is smoothly dispersed, preventing stress from concentrating too much at a single point. This significantly improves the wear resistance of the conductive plate 111 and further extends its service life.

[0079] In some embodiments, the busbar case assembly further includes insulating spacers 113. The insulating spacers 113 are positioned at least between the conductive plates 111 of the busbar connection assembly 110 of the multiple busbar assemblies, i.e., between one pair of conductive plates 111 and another pair of conductive plates 111.

[0080] The insulating spacer 113 is generally made of a high-insulating strength material, such as porcelain, glass, special plastic, or bulk molding compound (BMC). It can be used to electrically isolate electrical equipment and ensure the safety of electrical equipment and personnel by preventing arcing or surge phenomena in the electrical equipment.

[0081] In a busbar case assembly, insulating spacers 113 are placed at least between the conductive plates 111 of the busbar connection assembly 110 of multiple busbar assemblies. In actual operation, when busbar assemblies are connected by the busbar connection assembly 110, the insulating spacers 113 are installed between the conductive plates 111 of the connection assembly to achieve physical isolation between busbars and prevent direct current jumps.

[0082] This arrangement allows the insulating spacer 113 not only to provide a protective barrier but also to help maintain the independence of each busbar by avoiding short circuits between busbars, thereby enabling current to flow precisely along the designated path.

[0083] Based on the above, in actual applications, the contact resistance of the contact area between the busbar case assembly and the busbar connection assembly 110 in the embodiments of this disclosure can be reduced by 60%, the temperature rise can be reduced by 10K, and the cost of conductor materials can be reduced by 40%.

[0084] The above descriptions of the various realizations of this disclosure are illustrative, not exhaustive, and not limited to the realizations disclosed. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the realizations described. The choice of terms used herein is intended to best describe the principle, practical application, or technological improvement in the market of each realization, or to enable those skilled in the art to understand each realization disclosed herein.

Claims

1. A busbar connection assembly for connecting busbars, It includes a pair of conductive plates (111) suitable for sandwiching and connecting a first busbar (121) and a second busbar (122) that are separated from each other and extend along the same direction of extension, wherein each of the pair of conductive plates (111) is A main body (1112) is configured to overlap with the connecting portion (1211) located at the mutually adjacent ends of the first bus bar (121) and the second bus bar (122), A pair of connecting parts (1111) are provided, at least at the extending end of the main body (1112), and are bonded to the main body (1112) by solid-liquid bonding or solid-solid bonding, using the same material as the surface of the connecting part (1211) of the first busbar (121) and the second busbar (122), respectively. A positioning hole (1113) is formed in the main body (1112) and is located in the central part of the main body (1112) in the extending direction, A busbar connection assembly characterized by including a locking member (112) which is coupled to the positioning hole (1113) and presses the pair of connecting portions (1111) against the surface of the connecting portion (1211) of the first busbar (121) and the second busbar (122), respectively, thereby locking and electrically connecting the first busbar (121) and the second busbar (122).

2. The busbar connection assembly according to claim 1, characterized in that the extending length of each of the pair of connecting portions (1111) in the extending direction is equal to the length of the connecting portion (1211) of the first busbar (121) or the second busbar (122) in the extending direction.

3. The busbar connection assembly according to claim 2, characterized in that the extending length of the connecting portion (1111) along the extending direction of the conductive plate (111) is at least three times the sum of the thicknesses of the main body (1112) and the connecting portion (1111).

4. The busbar connection assembly according to any one of claims 1 to 3, characterized in that the thickness of the connecting portion (1111) is less than or equal to the thickness of the main body (1112).

5. The conductive plate (111) is The busbar connection assembly according to any one of claims 1 to 3, further comprising a plurality of stopper blocks (1114) configured to protrude from the periphery approaching the positioning hole (1113) of the main body (1112).

6. The busbar connection assembly according to any one of claims 1 to 3, characterized in that chamfers are formed on the ends of the pair of conductive plates (111) in the extending direction.

7. A busbar assembly, A busbar connection assembly according to any one of claims 1 to 6, A busbar group comprising at least a first busbar (121) and a second busbar (122) extending along the same direction of extension, wherein the first busbar (121) and the second busbar (122) each include a connecting portion (1211) and a power transmission portion for power transmission, and the connecting portion (1211) includes a busbar group formed at the ends of the first busbar (121) and the second busbar (122) where the power transmission portions approach each other. The busbar assembly is characterized in that the connecting portion (1211) is sandwiched between the connecting portions (1111) of the conductive plate (111) of the busbar connection assembly, and is suitable for establishing an electrical connection between the first busbar (121) and the second busbar (122).

8. The busbar assembly according to claim 7, characterized in that the connecting portion (1211) is integrally formed at the ends of the first busbar (121) and the second busbar (122) where the power transmission portions are close to each other by solid-liquid bonding or solid-solid bonding.

9. The busbar assembly according to claim 7, characterized in that the length of the connecting portion (1211) in the extending direction is equal to the extending length of the connecting portion (1111) in the extending direction.

10. The busbar assembly according to any one of claims 7 to 9, characterized in that the connecting portion (1211) is arranged on the entire side surface of the first busbar (121) or the second busbar (122) that is close to the conductive plate (111), and is electrically coupled to the conductive plate (111).

11. A busbar case assembly, Bus bar case (120), A busbar case assembly characterized by comprising a plurality of busbar assemblies according to any one of claims 7 to 10, which are disposed in the busbar case (120).

12. The busbar case assembly according to claim 11, further comprising insulating spacers (113) disposed at least between the conductive plates (111) of the busbar connection assemblies of a plurality of the busbar assemblies.

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