Bus duct, power distribution system and battery production system

Abstract

The embodiment of the utility model provides a bus duct, a power distribution system and a battery production system, and relates to the technical field of circuit devices. The bus duct comprises a wire inlet unit, a load bearing unit and a filtering unit, the wire inlet unit is used for connecting superior power distribution equipment, and the load bearing unit is used for connecting a load; the filtering unit comprises a protective shell, a first conducting bar and a filter, the first conducting bar and the filter are installed in the protective shell, the first conducting bar is conductively connected with the wire inlet unit and the load bearing unit, and the filter is conductively connected to the first conducting bar. The filtering unit is integrated with the first conducting bar and the filter, the first conducting bar and the filter are not only used for connecting the wire inlet unit and the load bearing unit in series, but also the filter can monitor the harmonic current of the bus duct and generate reverse compensation current to offset harmonic waves, and then the stability and reliability of a bus duct system are improved.

Description

Technical Field

[0001] This application relates to the field of circuit device technology, and more specifically, to a busbar trunking, power distribution system, and battery production system. Background Technology

[0002] Busbar trunking is a closed conductive system used for efficient power distribution. It consists of a protective shell, conductor bars (copper or aluminum), and insulating materials. It features high current carrying capacity, flexible installation, and high safety.

[0003] In battery production systems, busbars provide stable power support for high-energy-consuming processes such as coating machines and formation equipment. Improving the stability of busbar systems is a research direction in circuit device technology. Utility Model Content

[0004] This application provides a busbar trunking system, a power distribution system, and a battery production system, which can improve the stability of the busbar trunking system.

[0005] In a first aspect, embodiments of this application provide a busbar trunking system, including an incoming line unit, a load receiving unit, and a filtering unit. The incoming line unit is used to connect to upstream power distribution equipment, and the load receiving unit is used to connect to a load. The filtering unit includes a protective shell, a first conductive busbar, and a filter installed within the protective shell. The first conductive busbar is electrically connected to both the incoming line unit and the load receiving unit. The filter is electrically connected to the first conductive busbar and is used to monitor the harmonic current of the first conductive busbar and generate a reverse compensation current to cancel the harmonics.

[0006] By adopting the above technical solution, a filtering unit is set between the incoming line unit and the load receiving unit. The filtering unit integrates a first conductive busbar and a filter. It is not only used to connect the incoming line unit and the load receiving unit in series, but the filter can also monitor the harmonic current of the bus trunking and generate a reverse compensation current to cancel the harmonics, control the harmonic voltage / current distortion rate within a safe range, and thus improve the stability and reliability of the bus trunking system.

[0007] In some embodiments of this application, the filtering unit further includes a current transformer installed inside the protective housing, the current transformer being connected to the first busbar and used to collect the current signal of the load.

[0008] The above technical solution is adopted to design the filter unit to include a current transformer, which is used to monitor the current of the bus trunking, provide load operation data, and support overload protection, power metering and fault diagnosis.

[0009] In some embodiments of this application, the busbar trunking further includes a control circuit, the filter includes a filter circuit electrically connected to the control circuit, the control circuit is electrically connected to the current transformer to obtain the current signal and output a harmonic compensation signal to the filter circuit, and the filter circuit is electrically connected to the first conductive bus to output a reverse compensation current to the first conductive bus.

[0010] By adopting the above technical solution, the control circuit is designed to be connected to the filter circuit and the current transformer. The control circuit can generate a harmonic compensation signal by collecting current data from the current transformer. The filter circuit generates a reverse compensation current based on the harmonic compensation signal, thereby achieving a more accurate harmonic cancellation effect.

[0011] In some embodiments of this application, the filter includes a housing, and the control circuit is mounted inside the housing.

[0012] By adopting the above technical solution, the control circuit is integrated into the filter, which can improve the response speed and compensation accuracy, realize intelligent adaptive adjustment, and simplify installation and maintenance.

[0013] In some embodiments of this application, the first conductive bus includes a first connecting portion, a carrying portion, and a second connecting portion; the incoming line unit includes a second conductive bus; the load receiving unit includes a third conductive bus; the first connecting portion and the second conductive bus are electrically connected; the second connecting portion and the third conductive bus are electrically connected; and the carrying portion is used to connect the current transformer and the filter.

[0014] Using the above technical solution, the first busbar is designed to include a first connecting part, a carrying part, and a second connecting part. The first connecting part and the second connecting part facilitate the connection of the filter unit to the incoming line unit and the load receiving unit, and the carrying part facilitates the connection of the current transformer and the filter.

[0015] In some embodiments of this application, along a first direction intersecting the extension direction of the first conductive busbar, the first connecting portion includes a plurality of spaced-apart first conductive elements, the second connecting portion includes a plurality of spaced-apart second conductive elements, the bearing portion includes a plurality of spaced-apart third conductive elements, at least one of the plurality of third conductive elements is equipped with the current transformer, and the spacing between two adjacent third conductive elements is greater than the spacing between two adjacent first conductive elements and the spacing between two adjacent second conductive elements.

[0016] By adopting the above technical solution, the spacing of the third conductive element is designed to be greater than the spacing of the first conductive element and the spacing of the second conductive element, which can facilitate the installation of the current transformer and eliminate the need to configure an insulation structure between two adjacent third conductive elements, thereby reducing costs.

[0017] In some embodiments of this application, the spacing between two adjacent third conductive elements along the first direction is 70 mm to 110 mm.

[0018] By adopting the above technical solution, the spacing between two adjacent third conductive elements is designed to be 70mm to 110mm. This not only makes it easier to install the current transformer and eliminates the need for an insulation structure, but also better matches the size of the filter, allowing multiple third conductive elements to cover most of the surface of the filter facing the first conductive bar.

[0019] In some embodiments of this application, there are multiple current transformers, each of which is installed on a plurality of third conductive elements, and adjacent current transformers are staggered along the extension direction of the first conductive busbar.

[0020] By adopting the above technical solution, two adjacent current transformers are staggered in the first direction. When installing multiple current transformers, the distance between the two third conductive components can be appropriately reduced, and the possibility of mutual interference between the two current transformers can be reduced.

[0021] In some embodiments of this application, at least one of the first conductive elements is connected to the third conductive element via a first bent portion, and at least one of the second conductive elements is connected to the third conductive element via a second bent portion.

[0022] By adopting the above technical solution, the first conductive element is provided with a first curved portion, and the second conductive element is provided with a second curved portion, so that the third conductive element with a large gap can be connected to the first conductive element and the second conductive element respectively.

[0023] In some embodiments of this application, the current transformer is provided with a through hole, and the current transformer is sleeved onto the third conductive element through the through hole.

[0024] By adopting the above technical solution, the current transformer is connected to the third conductive component, which is convenient to install without disconnecting the busbar, reduces contact resistance, improves measurement accuracy, has a compact structure, saves space, and enhances the ability to resist electromagnetic interference.

[0025] In some embodiments of this application, the filter processing unit further includes a heat sink, which is thermally connected to the filter.

[0026] By adopting the above technical solution, the filter processing unit is designed to also include a heat sink. Using a heat sink to dissipate heat from the filter can significantly improve heat dissipation efficiency, reduce filter temperature rise, extend filter life, and maintain stable filter performance.

[0027] In some embodiments of this application, the number of load receiving units and the number of filtering units are both multiple, one of the multiple filtering units is connected to the incoming line unit and one of the load receiving units, and the remaining filtering units are connected in series between two adjacent load receiving units.

[0028] By adopting the above technical solution, the number of load-bearing units and filtering units is designed to be multiple. Multiple filtering units can provide better filtering effect and further improve the safety and reliability of the bus trunking system.

[0029] Secondly, embodiments of this application provide a power distribution system, including an upstream power distribution device and a busbar trunking as described in any of the above technical solutions, wherein the incoming line unit of the busbar trunking is electrically connected to the upstream power distribution device.

[0030] Thirdly, embodiments of this application provide a battery production system, including the power distribution system described in the above technical solutions. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a busbar trunking provided in some embodiments of this application;

[0033] Figure 2 A schematic diagram of the structure of the filter unit of the busbar provided in some embodiments of this application;

[0034] Figure 3 A top view of a filtering unit for a busbar provided in some embodiments of this application;

[0035] Figure 4 A front view of a filtering unit for a busbar provided in some embodiments of this application;

[0036] Figure 5 A side view of a filtering unit for a busbar provided in some embodiments of this application;

[0037] Figure 6 Electrical connection diagrams of the filtering units of the busbar trunking provided in some embodiments of this application.

[0038] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0039] 100. Busbar trunking;

[0040] 10. Incoming line unit; 11. First housing;

[0041] 20. Load-bearing unit; 21. Second housing;

[0042] 30. Filtering unit; 31. Protective shell; 311. Main frame; 312. Protective plate; 32. First conductive bar; 321. First connecting part; 3211. First conductive element; 32111. First bent part; 322. Second connecting part; 3221. Second conductive element; 32211. Second bent part; 323. Supporting part; 3231. Third conductive element; 33. Filter; 331. Filtering circuit; 332. Housing; 34. Current transformer; 341. Through hole; 35. Control circuit; 36. Heat sink;

[0043] 40. Plug-in box;

[0044] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "including," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0047] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0050] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0051] In this application, "multiple" means two or more (including two).

[0052] The embodiments of this application will now be described in detail.

[0053] Busbar trunking is a highly efficient and flexible power distribution device that enables rapid distribution and expansion of electrical energy through plug-in boxes. In power distribution systems, busbar trunking is widely used in industrial plants, data centers, and large commercial buildings due to its compact structure, high current carrying capacity, and convenient installation. It is particularly suitable for scenarios requiring frequent adjustments to the power distribution layout or the transmission of large currents. Compared to traditional cable distribution methods, busbar trunking not only reduces line losses but also significantly improves the reliability and maintainability of the power distribution system.

[0054] In battery production systems, busbars, as the core intermediate link of the power distribution system, play a crucial role in power distribution. Production equipment draws power directly from the busbars through plug-in junction boxes, satisfying the power supply needs of high-power loads while also enabling a modular layout of the power distribution lines. This design not only simplifies the power access process for production line equipment but also facilitates subsequent capacity expansion or equipment adjustments.

[0055] However, battery production systems extensively utilize frequency converters, rectifiers, and automated control equipment. While these nonlinear loads enhance production efficiency, they also inject significant harmonic currents into the busbars. Harmonic currents can cause conductor heating, voltage distortion, and even resonance, not only degrading power quality but also potentially threatening insulation life and increasing fire risk. In high-precision manufacturing fields such as battery production, harmonic interference can also affect the normal operation of sensitive equipment.

[0056] Therefore, how to suppress harmonic hazards in busbar systems has become an important technical issue for ensuring power distribution safety and power quality.

[0057] In view of this, this application provides a technical solution that solves the above-mentioned technical problem by connecting a filter unit to the incoming unit of the bus trunking, wherein the filter unit has a filter capable of canceling harmonics.

[0058] The following is in conjunction with the appendix Figure 1-6 The busbar trunking 100 provided in the embodiments of this application will be described.

[0059] Combined with appendix Figure 1-5 As shown, this application embodiment provides a busbar trunking 100, including an incoming line unit 10, a load receiving unit 20, and a filtering unit 30. The incoming line unit 10 is used to connect to the upstream power distribution equipment, and the load receiving unit 20 is used to connect to the load. The filtering unit 30 includes a protective shell 31 and a first conductive busbar 32 and a filter 33 installed in the protective shell 31. The first conductive busbar 32 is conductively connected to the incoming line unit 10 and the load receiving unit 20, respectively. The filter 33 is conductively connected to the first conductive busbar 32. The filter 33 is used to monitor the harmonic current of the first conductive busbar 32 and generate a reverse compensation current to cancel the harmonics.

[0060] The "reverse compensation current" refers to the current generated by filter 33 based on the detected harmonic current, which has the same amplitude but opposite phase to the harmonic current. By injecting this current into the first busbar 32, the original harmonic current can be canceled, thereby reducing the harmonic content in the busbar trunking and improving power quality. Its principle is similar to "active noise cancellation," which achieves harmonic suppression through the superposition of reverse signals.

[0061] In this embodiment, the incoming line unit 10 is the power input terminal of the busbar 100, used to connect to the upstream power distribution equipment, which can be a transformer or a distribution cabinet. The incoming line unit 10 includes a second conductive bus (not shown in the figure), an insulating bracket (not shown in the figure), and a first housing 11. The second conductive bus is made of copper or aluminum (including copper alloys and aluminum alloys), and the second conductive bus is connected to the upstream power distribution equipment by bolts or plug-in connections.

[0062] The load receiving unit 20 is a power distribution extension of the bus trunking 100, responsible for distributing electrical energy to downstream load equipment. Its main body includes a third conductor bar (not shown in the figure), an insulation layer (not shown in the figure), and a second housing 21. A plug-in box 40 can be installed on the side wall of the load receiving unit 20 to facilitate quick power supply and meet the flexible load access requirements.

[0063] In this embodiment, the first conductive busbar 32 is the core conductor of the filter unit 30, and it is directly connected to the second conductive busbar of the input unit 10 and the third conductive busbar of the load receiving unit 20. The material of the first conductive busbar 32 is the same as that of the main circuit of the busbar trunking 100 (such as copper or aluminum). The first conductive busbar 32 is used to carry the fundamental current and transmit harmonics to the filter 33, and it needs to meet the requirements of low impedance and high thermal stability.

[0064] The filter 33 can be connected to the first conductive bus 32. The filter 33 is used to filter out harmonics in a specific frequency band and reduce resonance. In this embodiment, the filter 33 can be an active filter 33.

[0065] The "conductive connection" described in this embodiment refers to the formation of a current transmission path between two entities through physical contact (such as bolt crimping or plug-in terminals) or welding. In the busbar 100, all conductive connections must meet standards for current carrying capacity, temperature rise, and mechanical strength.

[0066] The filtering unit 30 in this embodiment has an integrated first conductive busbar 32 and a filter 33. The first conductive busbar 32 is used to connect the incoming line unit 10 and the load receiving unit 20 in series. The filter 33 can monitor the harmonic current of the first conductive busbar 32 and generate a reverse compensation current to cancel the harmonics, control the harmonic voltage / current distortion rate within a safe range, and thus improve the stability and reliability of the busbar trunking 100 system.

[0067] The protective shell 31 in this embodiment may include a main frame 311 and a protective plate 312 mounted on the main frame 311. The protective shell 31 may be a box structure and may be connected to the first shell 11 and the second shell 21 described above. The first conductive bus 32 and the filter 33 are both installed inside the protective shell 31, which not only protects the first conductive bus 32 and the filter 33, but also integrates the filter unit 30, making it convenient to move and install.

[0068] Compared to traditional methods that directly connect the filter 33 in parallel to the outside of the busbar trunking 100, integrate the filter 33 inside the plug-in box 40 of the busbar trunking 100, or install the filter 33 on the upstream power distribution equipment, this embodiment sets the filter unit 30 between the incoming line unit 10 and the load receiving unit 20, and the filter 33 is directly connected to the main circuit. This has at least the following advantages: more accurate harmonic detection and compensation; the integrated design of the filter unit 30 and the busbar trunking 100 results in a shorter heat dissipation path and significantly improved long-term operational stability. The filter unit 30 is directly embedded between the incoming line unit 10 and the load receiving unit 20 of the busbar trunking 100, eliminating the need for external space and reducing connection cable costs. The filter unit 30 is modularly disassembled, supporting live maintenance (with safety protection required), reducing production downtime.

[0069] In some examples, the filter unit 30 may optionally include a current transformer 34, which is electrically connected to the first busbar 32 and is used to acquire the current signal of the load.

[0070] The current transformer 34 in this embodiment can be a current transformer, which may include a high-permeability magnetic core and a secondary induction coil. The working principle of the current transformer 34 is based on electromagnetic induction. Through the coupling effect of the iron core magnetic circuit, the large current on the busbar is proportionally converted into a small current signal (e.g., 5A or 1A) to realize non-contact current measurement.

[0071] The "current signal" is an electrical signal induced by the current transformer 34 from the first conductor bus 32, reflecting changes in the load current. It typically contains the fundamental current and harmonic components. This signal is used for harmonic detection, enabling the filter unit 30 to analyze current distortion and generate a corresponding reverse compensation current, thereby achieving dynamic harmonic suppression.

[0072] In this embodiment, a current transformer 34 is integrated into the filter unit 30. The current transformer 34 monitors the main circuit current of the bus trunking 100 in real time, providing comprehensive load operation data for the system.

[0073] In some embodiments, the current transformer 34 can be designed with a wide bandwidth to capture the fundamental current and harmonic components. The measurement signal is transmitted to the monitoring system through a dedicated interface. It not only supports conventional overload protection, but also enables accurate metering of electrical energy, providing data support for energy efficiency management.

[0074] In addition, based on the current waveform characteristics collected by the current transformer 34, the system can intelligently analyze the load status (such as three-phase imbalance, harmonic distortion rate, etc.), and combine historical data to establish a fault prediction model to provide early warning of potential faults such as insulation aging and poor contact.

[0075] In this embodiment, the filter 33 and the current transformer 34 are integrated into the filter unit 30, which can realize the dual functions of dynamic harmonic suppression and accurate current monitoring, significantly improving the safety and intelligence level of the bus trunking 100 power system.

[0076] Combined with appendix Figure 6 As shown, in some examples, the busbar 100 also includes a control circuit 35, and the filter 33 includes a filter circuit 331 electrically connected to the control circuit 35. The control circuit 35 is electrically connected to the current transformer 34 to obtain a current signal and output a harmonic compensation signal to the filter circuit 331. The filter circuit 331 is electrically connected to the first conductive busbar 32 to output a reverse compensation current to the first conductive busbar 32.

[0077] "Electrical connection" refers to the connection between two parties through wireless signals (WIFI, Bluetooth, etc.) or wired circuits.

[0078] The control circuit 35 in this embodiment is the core processing unit of the harmonic compensation system, which can be integrated into the filter 33 or set as an independent module.

[0079] The hardware of the control circuit 35 may include an ADC sampling circuit, a DSP digital signal processor, and an IGBT drive circuit. It receives the load current signal uploaded by the current transformer 34 in real time, uses an FFT algorithm to decompose the harmonic spectrum, and generates a harmonic compensation signal based on the instantaneous signal. This circuit also has a communication interface, supporting data interaction with the upper-level energy management system.

[0080] The signal output from control circuit 35 drives filter circuit 331 of filter 33, which generates a reverse compensation current with the same amplitude but opposite phase as the detected harmonic through inverter. This current is injected into first busbar 32 to achieve dynamic harmonic cancellation. The whole process forms a closed-loop control of "detection-calculation-compensation".

[0081] The current data collected by the current transformer 34 provides the filter 33 with high-precision harmonic source location, especially for non-characteristic harmonics (such as interharmonics) generated by frequency converters and rectifiers. At the same time, the filter 33's rapid suppression of harmonics reduces current waveform distortion, freeing the current transformer 34 from harmonic interference and improving the measurement accuracy of the fundamental current and residual harmonics. This bidirectional optimization enables the system control accuracy to reach ±1%.

[0082] In the above technical solution, the closed-loop control mechanism of this embodiment provides real-time feedback of the compensation effect through the current transformer 34, enabling the control circuit 35 to dynamically adjust the output of the filter 33, significantly improving the compensation accuracy and system reliability. Secondly, the active suppression of high-frequency harmonics by the filter 33 effectively reduces current waveform distortion, not only reducing the risk of core saturation of the current transformer 34, but also expanding the measurement dynamic range, allowing the current transformer 34 to maintain high-precision measurement even in complex electromagnetic environments. In addition, harmonic elimination can significantly reduce line losses, and the accurate metering data provided by the current transformer 34 can directly verify the energy-saving effect, providing data support for energy efficiency management. Finally, this embodiment deeply integrates detection, control, and compensation functions to form a self-optimizing intelligent system, which has significant advantages in response speed, space utilization, and ease of maintenance compared to external filter devices.

[0083] In some examples, the filter 33 may optionally include a housing 332, within which the control circuitry 35 is mounted.

[0084] In other words, in this embodiment, the control circuit 35 is integrated inside the filter 33, and the control circuit 35 is also a part of the filter 33 itself.

[0085] Compared to treating the control circuit 35 as a separate module, integrating the control circuit 35 into the filter 33 improves the response speed and reliability of the filter 33 system, shortens the signal transmission distance, eliminates communication delays between modules, and makes harmonic compensation faster and more accurate. Furthermore, it results in a compact structure, reduces external wiring nodes, enhances anti-interference capabilities, and is more suitable for complex industrial environments.

[0086] The integrated design of the control circuit 35 saves space and cost, and is more suitable for the compact layout of the bus trunking 100. The internal circuits share a power supply and shielding structure, reducing the risk of failure and maintenance difficulty, and significantly improving overall reliability.

[0087] Combined with appendix Figure 2 and attached Figure 3 As shown, in some examples, optionally, the first busbar 32 includes a first connecting portion 321, a carrying portion 323, and a second connecting portion 322; the incoming line unit 10 includes a second busbar; the load receiving unit 20 includes a third busbar; the first connecting portion 321 and the second busbar are electrically connected; the second connecting portion 322 and the third busbar are electrically connected; and the carrying portion 323 is used to connect the current transformer 34 and the filter 33.

[0088] In this embodiment, the first connecting part 321 serves as the input end of the first conductive bus 32. It can be designed with a multi-hole bolt connection to connect with the second conductive bus of the input unit 10, thereby achieving low contact resistance during high current transmission.

[0089] In this embodiment, the support part 323 is located in the middle section of the first conductive busbar 32. The support part 323 can be directly conductively connected to the filter circuit 331 and the current transformer 34 respectively. The specific connection method between the support part 323 and the current transformer 34 is given below.

[0090] The second connecting part 322 forms a stable contact with the third conductive busbar of the load receiving unit 20. In this embodiment, the first connecting part 321 and the second connecting part 322 can be plugged into other conductive busbars respectively. For example, the first connecting part 321 connecting the line input unit 10 can be plugged into the second conductive busbar of the line input unit 10. Similarly, the first connecting part 321 can be plugged into the third conductive busbar of the load receiving unit 20.

[0091] In addition, the protective shell 31 of this embodiment may be provided with an opening (not shown in the figure) to facilitate the extension of the first connecting part 321 and the second connecting part 322.

[0092] The first busbar 32 is designed to include a first connecting part 321, a supporting part 323, and a second connecting part 322. The first connecting part 321 and the second connecting part 322 facilitate the connection of the filter unit 30 to the incoming line unit 10 and the load receiving unit 20. The supporting part 323 facilitates the connection of the current transformer 34 and the filter 33.

[0093] In some examples, optionally, along a first direction X intersecting the extension direction of the first conductive busbar 32, the first connecting portion 321 includes a plurality of spaced-apart first conductive elements 3211, the second connecting portion 322 includes a plurality of spaced-apart second conductive elements 3221, the carrying portion 323 includes a plurality of spaced-apart third conductive elements 3231, at least one of the plurality of third conductive elements 3231 is equipped with a current transformer 34, and the distance a between two adjacent third conductive elements 3231 is greater than the distance b between two adjacent first conductive elements 3211 and the distance c between two adjacent second conductive elements 3221, respectively.

[0094] The first conductive element 3211, the second conductive element 3221, and the third conductive element 3231 in this embodiment can be made of copper (including copper alloys) or aluminum (including aluminum alloys).

[0095] To facilitate the installation of the current transformer 34, in this embodiment, the spacing of the third conductive element 3231 is designed to be greater than the spacing of the first conductive element 3211 and the spacing of the second conductive element 3221.

[0096] In this way, the two adjacent third conductive elements 3231 can be spaced along the first direction X, thereby meeting the installation space requirements of the current transformer 34, and eliminating the need to configure an insulation structure between the two adjacent third conductive elements 3231, thus reducing production costs.

[0097] In some examples, optionally, the spacing between two adjacent third conductive elements 3231 along the first direction X is 70 mm to 110 mm.

[0098] For example, the spacing between two adjacent third conductive elements 3231 can be 70mm, 80mm, 90mm, 100mm, and 110mm, etc., which will not be listed one by one in this embodiment.

[0099] The spacing between two adjacent third conductive elements 3231 is designed to be 70mm to 110mm, which not only makes it easier to install the current transformer 34 and eliminates the need for an insulation structure, but also better matches the size of the filter 33, so that multiple third conductive elements 3231 can cover most of the surface of the filter 33 facing the first conductive bar 32.

[0100] In some examples, there are multiple current transformers 34, which are installed one by one on multiple third conductive elements 3231, and adjacent current transformers 34 are staggered along the extension direction of the first conductive bus 32.

[0101] The multi-transformer 34 design can simultaneously monitor the current of each phase, realize three-phase imbalance detection and phase harmonic analysis, and improve data integrity and fault location accuracy.

[0102] Taking the number of third conductive elements 3231 in the figure as five as an example, this embodiment designs the number of current transformers 34 to be four. The four current transformers 34 are installed on the four third conductive elements 3231. One of the third conductive elements 3231 can be used as a spare to install other structures or for grounding.

[0103] Compared to the method of installing current transformers 34 on all five third conductive components 3231, reserving one or more third conductive components 3231 can save consumables and installation costs while meeting the monitoring requirements of current transformers 34. Moreover, reserving one conductive component without installing a current transformer 34 can reserve space for future system expansion or modification, thereby improving system flexibility.

[0104] Since two adjacent current transformers 34 are located on two adjacent third conductive elements 3231 along the first direction X, the two adjacent current transformers 34 in the first direction X in the figure are definitely staggered.

[0105] Furthermore, in this embodiment, the two adjacent current transformers 34 are also designed to be staggered in the extension direction of the first conductive bus 32 (the second direction Y in the figure), so that when multiple current transformers 34 are installed, the distance between the two third conductive elements 3231 can be appropriately reduced, and the possibility of mutual interference between the two current transformers 34 can be reduced.

[0106] In some examples, optionally, at least one first conductive element 3211 is connected to the third conductive element 3231 via a first bent portion 32111, and at least one second conductive element 3221 is connected to the third conductive element 3231 via a second bent portion 32211.

[0107] Taking the five first conductive elements 3211 in the figure as an example, all or part of the five first conductive elements 3211 (e.g., the four first conductive elements 3211 in the figure) may have a first curved portion 32111. The first curved portion 32111 extends in a direction away from the center of the first connecting portion 321 along the first direction X, so that the first connecting portion 321 formed by multiple first conductive elements 3211 has a larger profile on the side facing the third conductive element 3231, which facilitates docking with the larger overall profile of the support portion 323.

[0108] The second curved portion 32211 extends away from the center of the second connecting portion 322 along the first direction X, making the side of the second connecting portion 322 formed by the multiple second conductive elements 3221 facing the third conductive element 3231 have a larger profile, which facilitates docking with the larger overall profile of the support portion 323.

[0109] The first curved portion 32111 can be L-shaped, S-shaped, or similar, as long as it can be connected to the third conductive element 3231. Similarly, the structure of the second curved portion 32211 of the second conductive element 3221 is also the same.

[0110] In some embodiments, the first curved portion 32111 may include an arcuate bend and an angular bend, and the second curved portion 32211 may also be configured in this way.

[0111] In this embodiment, the first conductive element 3211 is provided with a first bent portion 32111, and the second conductive element 3221 is provided with a second bent portion 32211, so that the third conductive element 3231 with a larger spacing can be connected to the first conductive element 3211 and the second conductive element 3221 respectively.

[0112] Combined again with the appendix Figure 2 As shown, in some examples, the current transformer 34 is provided with a through hole 341, through which the current transformer 34 is sleeved onto the third conductive element 3231.

[0113] The current transformer 34 adopts a ring structure and has a through hole 341, through which it is directly sleeved onto the third conductive element 3231. This mechanical connection method does not require additional fasteners, and utilizes the supporting force of the conductive element itself to achieve stable installation while ensuring the complete closure of the magnetic circuit.

[0114] In some embodiments, the inner wall of the through hole 341 can be covered with an insulating material to reduce the risk of short circuit caused by direct contact between the current transformer 34 and the conductive element. At the same time, the current transformer 34 and the conductive element are connected by non-contact electromagnetic coupling, thereby realizing the connection between the current transformer 34 and the conductive element.

[0115] Combined again with the appendix Figure 2 As shown, in some examples, the filter 33 processing unit may optionally include a heat sink 36, which is thermally connected to the filter 33.

[0116] The heat sink 36 can be a heat sink structure, such as an aluminum alloy heat sink. The shape of the heat sink is not limited, such as a fin or a finned structure.

[0117] The filter 33 may include a housing 332, which has two first surfaces along the third direction Z in the figure. One of the first surfaces faces the first conductive bus 32. The third direction Z is perpendicular to the first direction X and the second direction Y, respectively. A heat sink 36 can be installed on the first surface away from the first conductive bus 32.

[0118] Alternatively, a heat sink 36 can be installed on the surface of the housing 332 along the second direction Y and / or the first direction X. Using the heat sink 36 to dissipate heat from the filter 33 can significantly improve heat dissipation efficiency, reduce the temperature rise of the filter 33, extend the life of the filter 33, and maintain the stable filtering performance of the filter 33.

[0119] Combined again with the appendix Figure 1 As shown, in some examples, optionally, there are multiple load receiving units 20 and multiple filter units 30, one of the multiple filter units 30 is connected to the input unit 10 and one of the load receiving units 20, and the remaining filter units 30 are connected in series between two adjacent load receiving units 20.

[0120] For example Figure 1 The load receiving unit 20 and the filter unit 30 are both two in number. One filter unit 30 is connected to the incoming line unit 10 and one of the load receiving units 20 respectively, and the other filter unit 30 is connected in series between the two load receiving units 20.

[0121] Of course, the number of load receiving units 20 and filtering units 30 is not limited to this. For example, there can be three or even more. In addition, the load receiving unit 20 can be an L-shaped segment, a U-shaped segment, or other structures, in addition to the straight line segment shown in the figure. This embodiment will not list them one by one.

[0122] In this embodiment, the number of load receiving unit 20 and filter unit 30 is designed to be multiple. Multiple filter units 30 can provide better filtering effect and further improve the safety and reliability of the bus trunking 100 system.

[0123] Based on the busbar trunking 100 described above, this application embodiment also provides a power distribution system, which includes an upstream power distribution device (such as a transformer or distribution cabinet) and the busbar trunking 100 described above. The incoming line unit 10 of the busbar trunking 100 is electrically connected to the upstream power distribution device, and the load receiving unit 20 of the busbar trunking 100 is used to connect the load.

[0124] Based on the aforementioned power distribution system, this application embodiment also provides a battery production system, which includes the aforementioned power distribution system. In addition, the battery production system also includes a load, which may include production equipment (such as slurry mixing equipment, coating equipment, stirring equipment, stacking equipment, welding equipment, etc.), testing and formation equipment (such as charge and discharge testing equipment, internal resistance testing equipment, or battery simulated load equipment), auxiliary system equipment (such as air conditioning equipment, automated handling equipment), and power distribution and protection equipment (such as frequency converters, switching power supplies, etc.).

[0125] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below.

[0126] Combined with appendix Figure 1-6As shown in the figure, this application embodiment provides a busbar trunking 100, including an incoming line unit 10, a load receiving unit 20, and a filtering unit 30. The incoming line unit 10 is used to connect to upstream power distribution equipment, and the load receiving unit 20 is used to connect to a load. The filtering unit 30 includes a protective housing 31 and a first conductive busbar 32 and a filter 33 installed inside the protective housing 31. The first conductive busbar 32 is electrically connected to the incoming line unit 10 and the load receiving unit 20, respectively. The filter 33 is electrically connected to the first conductive busbar 32 and is used to monitor the harmonic current of the first conductive busbar 32 and generate a reverse compensation current to cancel the harmonics. The filtering unit 30 also includes a current transformer 34 installed inside the protective housing 31. The current transformer 34 is connected to the first conductive busbar 32 and is used to collect the current signal of the load. The busbar trunking 100 also includes a control circuit 35. The filter 33 includes a filter circuit 331 electrically connected to the control circuit 35. The control circuit 35 is electrically connected to the current transformer 34 to obtain a current signal and output a harmonic compensation signal to the filter circuit 331. The filter circuit 331 is electrically connected to the first conductive busbar 32 to output a reverse compensation current to the first conductive busbar 32. The first conductive busbar 32 includes a first connecting portion 321, a carrying portion 323, and a second connecting portion 322. The incoming line unit 10 includes a second conductive busbar, and the load receiving unit 20 includes a third conductive busbar. The first connecting portion 321 and the second conductive busbar are electrically connected, and the second connecting portion 322 and the third conductive busbar are electrically connected. The carrying portion 323 is used to connect the current transformer 34 and the filter 33. Along a first direction X intersecting the extension direction of the first conductive busbar 32, the first connecting portion 321 includes a plurality of spaced-apart first conductive elements 3211, the second connecting portion 322 includes a plurality of spaced-apart second conductive elements 3221, and the supporting portion 323 includes a plurality of spaced-apart third conductive elements 3231. At least one of the plurality of third conductive elements 3231 is equipped with a current transformer 34. The spacing between two adjacent third conductive elements 3231 is greater than the spacing between two adjacent first conductive elements 3211 and the spacing between two adjacent second conductive elements 3221, respectively. Along the first direction X, the spacing between two adjacent third conductive elements 3231 is 70 mm to 110 mm. There are multiple current transformers 34, which are installed one by one on the multiple third conductive elements 3231. Along the extension direction of the first conductive busbar 32, adjacent current transformers 34 are staggered. At least one first conductive element 3211 is connected to the third conductive element 3231 through a first bent portion 32111, and at least one second conductive element 3221 is connected to the third conductive element 3231 through a second bent portion 32211. The current transformer 34 is provided with a through hole 341, through which it is sleeved onto the third conductive element 3231. The filter 33 processing unit also includes a heat sink 36, which is thermally connected to the filter 33.There are multiple load receiving units 20 and multiple filter units 30. One of the multiple filter units 30 is connected to the incoming line unit 10 and one of the load receiving units 20. The remaining filter units 30 are connected in series between two adjacent load receiving units 20.

[0127] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0128] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A busbar trunking system, characterized in that, include: The incoming line unit is used to connect to the upstream power distribution equipment; Load-bearing unit, used to connect loads; as well as The filtering unit includes a protective housing, a first conductive busbar and a filter installed inside the protective housing. The first conductive busbar is conductively connected to the incoming line unit and the load receiving unit, respectively. The filter is conductively connected to the first conductive busbar. The filter is used to monitor the harmonic current of the first conductive busbar and generate a reverse compensation current to cancel the harmonics.

2. The busbar trunking according to claim 1, characterized in that, The filtering unit also includes a current transformer located inside the protective housing. The current transformer is connected to the first busbar and is used to collect the current signal of the load.

3. The busbar trunking according to claim 2, characterized in that, The busbar trunking also includes a control circuit, and the filter includes a filter circuit electrically connected to the control circuit. The control circuit is electrically connected to the current transformer to obtain the current signal and output a harmonic compensation signal to the filter circuit. The filter circuit is electrically connected to the first conductor bus to output a reverse compensation current to the first conductor bus.

4. The busbar trunking according to claim 3, characterized in that, The filter includes a housing, and the control circuit is installed inside the housing.

5. The busbar trunking according to claim 2, characterized in that, The first conductive bus includes a first connecting part, a carrying part, and a second connecting part; the incoming line unit includes a second conductive bus; the load receiving unit includes a third conductive bus; the first connecting part and the second conductive bus are electrically connected; the second connecting part and the third conductive bus are electrically connected; and the carrying part connects the current transformer and the filter.

6. The busbar trunking according to claim 5, characterized in that, Along a first direction intersecting the extension direction of the first conductive busbar, the first connecting portion includes a plurality of spaced-apart first conductive elements, the second connecting portion includes a plurality of spaced-apart second conductive elements, the bearing portion includes a plurality of spaced-apart third conductive elements, at least one of the plurality of third conductive elements is equipped with the current transformer, and the spacing between two adjacent third conductive elements is greater than the spacing between two adjacent first conductive elements and the spacing between two adjacent second conductive elements.

7. The busbar trunking according to claim 6, characterized in that, Along the first direction, the spacing between two adjacent third conductive elements is 70 mm to 110 mm.

8. The busbar trunking according to claim 6, characterized in that, The number of current transformers is multiple, and each of the multiple current transformers is installed on a multiple of the third conductive elements. Along the extension direction of the first conductive busbar, adjacent two current transformers are staggered.

9. The busbar trunking according to claim 6, characterized in that, At least one of the first conductive elements is connected to the third conductive element through a first bent portion, and at least one of the second conductive elements is connected to the third conductive element through a second bent portion.

10. The busbar trunking according to claim 6, characterized in that, The current transformer is provided with a through hole, and the current transformer is sleeved onto the third conductive element through the through hole.

11. The busbar trunking according to any one of claims 1-10, characterized in that, The filtering unit also includes a heat sink, which is thermally connected to the filter.

12. The busbar trunking according to any one of claims 1-10, characterized in that, The number of load receiving units and the number of filtering units are both multiple. One of the multiple filtering units is connected to the incoming line unit and one of the load receiving units, and the remaining filtering units are connected in series between two adjacent load receiving units.

13. A power distribution system, characterized in that, It includes upstream power distribution equipment and a busbar trunking as described in any one of claims 1-12, wherein the incoming line unit of the busbar trunking is electrically connected to the upstream power distribution equipment.

14. A battery production system, characterized in that, Including the power distribution system as described in claim 13.

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