Conductive bar assembly for photovoltaic inverter, circuit board assembly and photovoltaic inverter

Abstract

The application provides a kind of photovoltaic inverter with electrically conductive row assembly, circuit board assembly and photovoltaic inverter.The photovoltaic inverter with electrically conductive row assembly includes: the first electrically conductive section extending along the first direction and the second electrically conductive section extending along the second direction, the first direction intersects with the second direction;Wherein, the first electrically conductive section includes at least one first electrically conductive row body;Overcurrent protection device, electrically connected with the first electrically conductive section and the second electrically conductive section, overcurrent protection device is used to disconnect the output end of the first electrically conductive section and the electrical connection of the second electrically conductive section when the current is greater than the safety value;Current sensor, connected with the first electrically conductive section, current sensor is used to detect the current flowing through the first electrically conductive section.The photovoltaic inverter with electrically conductive row assembly integrates overcurrent protection device and current sensor in the electrically conductive path, solves the problem of low integration caused by split design in the prior art.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a busbar assembly, circuit board assembly and photovoltaic inverter for a photovoltaic inverter. Background Technology

[0002] Photovoltaic inverters are used in photovoltaic (PV) systems. In a PV system, the inverter at least performs the function of power conversion. In addition to inversion, the power conversion function of a PV inverter can also include rectification. A PV inverter includes multiple output positions, which need to be connected to an external interface, and the external interface is usually located at a considerable distance from the output positions.

[0003] In related technologies, multiple wires are used to electrically connect the output position to the external interface, which is a split design.

[0004] However, the split design of related technologies can easily lead to low integration of inverters. Utility Model Content

[0005] This application provides a busbar assembly, a circuit board assembly, and a photovoltaic inverter for a photovoltaic inverter, in order to solve the problem of low integration caused by the split design in the prior art.

[0006] In a first aspect, embodiments of this application provide a busbar assembly for a photovoltaic inverter, comprising: a first conductive segment extending along a first direction and a second conductive segment extending along a second direction, the first direction intersecting the second direction; wherein, the first conductive segment includes at least one first conductive busbar body; an overcurrent protection device electrically connected to the first conductive segment and the second conductive segment, the overcurrent protection device being used to disconnect the electrical connection between the output terminal of the first conductive segment and the second conductive segment when the current exceeds a safe value; and a current sensor connected to the first conductive segment, the current sensor being used to detect the current flowing through the first conductive segment.

[0007] In some embodiments, the current sensor is a contact current sensor, and the contact current sensor and the overcurrent protection device are connected in series between the first conductive bus body and the second conductive segment.

[0008] In some embodiments, the current sensor is a contact current sensor, and the first conductive segment includes two first conductive busbar bodies, with the contact current sensor and the overcurrent protection device connected in series between the two first conductive busbar bodies.

[0009] In some embodiments, the current sensor is an inductive current sensor, which is sleeved on the overcurrent protection device or the main body of the first conductive busbar.

[0010] In some embodiments, the overcurrent protection device has a first lug and a second lug, the first lug being in conductive contact with the first conductive bus body, and the second lug being in conductive contact with the second conductive segment.

[0011] In some embodiments, the first conductive segment includes two first conductive bus bodies, the overcurrent protection device has a first lug and a second lug, the first lug is in conductive contact with one of the two first conductive bus bodies, the second lug is in conductive contact with the other of the two first conductive bus bodies, and the first conductive segment is in conductive contact with the second conductive segment through the first conductive bus body in conductive contact with the second lug.

[0012] In some embodiments, at least one of the first conductive busbar bodies has a first bend, the first bend being used to position portions of the first conductive busbar body located at both ends of the first bend at different heights.

[0013] In some embodiments, the second conductive segment has a first through hole for passing through a first fastener for mounting the second conductive segment to the element to be connected.

[0014] In some embodiments, the axis of the first through hole is located on one side of the first reference surface, the first reference surface is perpendicular to the width direction of the second conductive segment, and the first reference surface passes through the center line of the length direction of the second conductive segment.

[0015] The photovoltaic inverter busbar assembly provided in this application solves the problem of low integration caused by the separate design in the prior art by directly integrating the overcurrent protection device and the current sensor into the conductive path. The overcurrent protection device disconnects the circuit mechanically or electronically when the current exceeds the safety threshold, cutting off the current transmission path to protect the electrical equipment. The current sensor monitors the current value in real time through direct contact or non-contact methods and feeds the detection signal back to the control system. The integrated design reduces the number of external components, lowers system complexity and the risk of connection point failures, and optimizes space utilization, making the photovoltaic inverter busbar assembly more compact. Through the above technical means, this application embodiment achieves the technical effects of functional integration, structural compactness, and performance stability in the electrical connection of photovoltaic inverters, providing an efficient and reliable solution for high power density inverters.

[0016] Secondly, embodiments of this application provide a circuit board assembly, including: a circuit board body, the circuit board body including a positive output position and a negative output position; a terminal assembly, including: a positive output terminal for electrical connection to an external interface; a positive input terminal electrically connected to the positive output terminal; a negative output terminal for electrical connection to an external interface; a negative input terminal electrically connected to the negative output terminal; and the aforementioned photovoltaic inverter busbar assembly, the photovoltaic inverter busbar assembly forming a positive busbar; the positive busbar is electrically connected to the positive output position and the positive input terminal respectively; and the negative busbar is electrically connected to the negative output position and the negative input terminal respectively.

[0017] In some embodiments, the negative electrode conductive bus includes a first negative electrode conductive segment extending along the first direction and a second negative electrode conductive segment extending along the second direction; wherein the projections of the positive electrode conductive bus and the negative electrode conductive bus in a second reference plane are spaced apart from each other, and the second reference plane is parallel to the first direction and the second direction; the negative electrode conductive bus is electrically connected to the negative electrode output terminal through the second negative electrode conductive segment, and the positive electrode conductive bus is electrically connected to the positive electrode input terminal through the first conductive segment; the negative electrode conductive bus is electrically connected to the negative electrode input terminal through the first negative electrode conductive segment; and / or, the negative electrode conductive bus has a second bend, the second bend being used to place portions of the negative electrode conductive bus located at both ends of the second bend at different heights.

[0018] In some embodiments, the circuit board assembly further includes a magnetic ring sleeved on the first conductive segment and the first negative conductive segment.

[0019] In some embodiments, the circuit board assembly further includes a first conductive post and a second conductive post, wherein the second conductive segment and the positive output position are electrically connected through the first conductive post; and the second negative conductive segment and the negative output position are electrically connected through the second conductive post.

[0020] In some embodiments, the first conductive post is detachably connected to the second conductive segment, and the first conductive post is welded to the positive output position; the second conductive post is detachably connected to the second negative conductive segment, and the second conductive post is welded to the negative output position.

[0021] In some embodiments, the circuit board assembly includes a first fastener and a second fastener; the second conductive segment has a first through hole, and the second negative conductive segment has a second through hole; the first conductive post has a first threaded hole, and the first fastener is used to pass through the first through hole and be threadedly connected to the first threaded hole, and the first conductive post and the second conductive segment are detachably connected by the first fastener; the second conductive post has a second threaded hole, the second negative conductive segment has a second through hole, and the second fastener is used to pass through the second through hole and be threadedly connected to the second threaded hole, and the second conductive post and the second negative conductive segment are detachably connected by the second fastener.

[0022] In some embodiments, the axis of the first through hole is located on the side of the first reference surface facing the second negative conductive segment, the first reference surface is perpendicular to the width direction of the second conductive segment, and the first reference surface passes through the center line of the length direction of the second conductive segment; and / or, the axis of the second through hole is located on the side of the third reference surface facing the second conductive segment, the third reference surface is perpendicular to the width direction of the second negative conductive segment, and the third reference surface passes through the center line of the length direction of the second negative conductive segment.

[0023] In some embodiments, the terminal assembly further includes a terminal block, on which the positive output terminal, the positive input terminal, the negative output terminal, and the negative input terminal are disposed. The positive input terminal and the negative input terminal are located on the side of the terminal block closer to the positive and negative conductive busbars, while the positive output terminal and the negative output terminal are located on the side of the terminal block farther from the positive and negative conductive busbars.

[0024] The circuit board assembly provided in this application embodiment includes a terminal block assembly comprising a positive output terminal, a positive input terminal, a negative output terminal, and a negative input terminal, and a conductive bus assembly for a photovoltaic inverter as provided in this application embodiment. The positive conductive bus is electrically connected to both the positive output terminal and the positive input terminal, and the negative conductive bus is electrically connected to both the negative output terminal and the negative input terminal. This facilitates conductive connection between external interfaces via the positive output terminal and the positive output terminal, and between external interfaces via the negative output terminal and the negative output terminal, thus solving the problem of difficulty in connecting the positive and negative output terminals to external interfaces. Furthermore, by utilizing the advantages of high current carrying capacity, low impedance, rigid structure, and ease of installation of the positive and negative conductive bus, it helps improve the safety, service life, and structural compactness of the circuit board assembly. It also helps reduce resistive heating of the circuit board assembly, thereby reducing energy consumption, and also helps reduce the processing difficulty of the circuit board assembly.

[0025] Furthermore, by incorporating the aforementioned photovoltaic inverter busbar assembly, the circuit board assembly features an overcurrent protection device that directly disconnects the circuit when the current exceeds a safe threshold, preventing damage to external electrical equipment due to short circuits or overloads. Simultaneously, a current sensor monitors the current value in real time and provides feedback signals for system control, thereby enhancing the safety of the circuit board assembly's external power supply.

[0026] Thirdly, embodiments of this application provide a photovoltaic inverter including the aforementioned photovoltaic inverter busbar assembly, or the aforementioned circuit board assembly.

[0027] The photovoltaic inverter provided in this application embodiment facilitates external wiring by setting up a conductive busbar assembly or circuit board assembly for the photovoltaic inverter provided in this application embodiment. The overcurrent protection device directly disconnects the circuit when the current exceeds the safety threshold, avoiding equipment damage due to short circuit or overload. At the same time, the current sensor monitors the current value in real time and provides feedback signals for system control, which helps to improve the safety of the photovoltaic inverter itself, the safety of external power supply, and the service life of the photovoltaic inverter. It also helps to improve the compactness of the photovoltaic inverter structure. Attached Figure Description

[0028] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0029] Figure 1 This is a schematic diagram of the structure of a photovoltaic inverter busbar assembly provided in an embodiment of this application.

[0030] Figure 2 This is a structural diagram of a circuit board assembly provided in an embodiment of this application.

[0031] Figure 3 This is a schematic cross-sectional view of the circuit board assembly along section AA provided in an embodiment of this application.

[0032] Figure 4 This is a schematic cross-sectional view of the circuit board assembly along section BB provided in an embodiment of this application.

[0033] Figure 5 This is a cross-sectional structural diagram of the first part of the circuit board assembly provided in an embodiment of this application.

[0034] Figure 6 This is a cross-sectional structural diagram of the second part of the circuit board assembly provided in an embodiment of this application.

[0035] Figure 7 This is a schematic diagram of the structure of the photovoltaic inverter busbar assembly and the negative electrode busbar provided in the embodiments of this application.

[0036] Figure 8 This is a schematic diagram of the structure of a photovoltaic inverter provided in an embodiment of this application.

[0037] Figure 9 This is a schematic diagram of the internal structure of a photovoltaic inverter provided in an embodiment of this application.

[0038] Explanation of reference numerals in the attached drawings: 100-Conducting bus assembly for photovoltaic inverter; 110-First conductive section; 111-Overcurrent protection device; 1111-First ear plate; 1112-Second ear plate; 112-First conductive bus body; 1121-First bending portion; 120-Second conductive section; 121-First through hole; 122-First reference surface; 130-Current sensor; 200-Circuit board body; 201-Positive output position; 202-Negative output position; 300-Terminal assembly; 310-Positive output terminal; 320- Positive input terminal; 330- Negative output terminal; 340- Negative input terminal; 350- Terminal block; 351- Partition; 400- Negative conductive busbar; 401- Second bend; 410- First negative conductive section; 420- Second negative conductive section; 421- Second through hole; 422- Third reference surface; 500- Magnetic ring; 610- First conductive post; 611- First threaded hole; 620- Second conductive post; 621- Second threaded hole; 701- First fastener; 702- Second fastener; 1000- Circuit board assembly.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0041] Photovoltaic inverters are used in photovoltaic (PV) systems. In a PV system, the inverter at least serves the function of power conversion. Besides inversion, the power conversion function of a PV inverter can also include rectification; for example, such a PV inverter can convert AC to DC from the grid to charge a battery for energy storage; or, such a PV inverter can convert DC to AC and then back to DC from the photovoltaic panels to charge the battery. For example, PV inverters are used to convert DC power from batteries to AC power for external power supply or grid connection.

[0042] A photovoltaic inverter includes multiple output positions, which need to be connected to an external interface, and the external interface is located far from the output position.

[0043] In related technologies, multiple wires are used to electrically connect the output position to the external interface, which is a split design.

[0044] However, the split design of related technologies can easily lead to low integration of inverters.

[0045] For example, the related technology adopts a split structure, and the overcurrent protection components and current sensors need to be installed separately, which can easily lead to a large overall size and complex assembly of the inverter. At the same time, the split layout design may limit the optimization of the current transmission path, increase the risk of resistance and temperature rise, and is not conducive to the safe operation of the inverter.

[0046] This application provides a busbar assembly, a circuit board assembly, and a photovoltaic inverter to solve the problem of low integration caused by the split design in the prior art.

[0047] This application provides a photovoltaic inverter busbar assembly, a circuit board assembly, and a photovoltaic inverter. The busbar assembly integrates an overcurrent protection device and a current sensor directly into the conductive path, solving the low integration problem caused by the separate design in the prior art. The overcurrent protection device disconnects the circuit mechanically or electronically when the current exceeds a safety threshold, cutting off the current transmission path to protect the electrical equipment. The current sensor monitors the current value in real time through direct contact or non-contact methods and feeds the detection signal back to the control system. The integrated design reduces the number of external components, lowers system complexity and the risk of connection point failures, while optimizing space utilization and making the photovoltaic inverter busbar assembly more compact. Through the above technical means, this application achieves functional integration, structural compactness, and performance stability in the electrical connection of photovoltaic inverters, providing an efficient and reliable solution for high power density inverters.

[0048] Reference Figures 1 to 9 As shown, the X-axis, Y-axis, and Z-axis are three mutually perpendicular coordinate axes in space. In the description of the embodiments provided in this application, the first direction refers to the direction parallel to the X-axis, the second direction refers to the direction parallel to the Y-axis, and the height direction is parallel to the Z-axis.

[0049] Reference Figure 1 As shown in the embodiment of this application, the photovoltaic inverter busbar assembly 100 includes a first conductive section 110, a second conductive section 120, and a current sensor 130.

[0050] In this embodiment, the first conductive segment 110 extends along a first direction, and the second conductive segment 120 extends along a second direction, with the first and second directions intersecting. In this embodiment, the first direction is perpendicular to the second direction; that is, in a reference plane parallel to both the first and second directions, the projection of the photovoltaic inverter busbar assembly 100 is approximately L-shaped. In some possible embodiments, the angle between the first and second directions may be non-right angles. In this case, in a reference plane parallel to both the first and second directions, the projection of the photovoltaic inverter busbar assembly 100 is approximately obtuse or acute.

[0051] The first conductive segment 110 includes at least one first conductive bus body 112. It should be noted that the first conductive bus body 112 refers to the main conductive material portion constituting the corresponding conductive path. Understandably, the first conductive bus body 112 extends generally along the second direction. For example, the first conductive bus body 112 can be a copper bus, an aluminum bus, or a silver-plated copper bus, etc. For example, the number of first conductive bus bodies 112 can be one, two, three, or more.

[0052] The overcurrent protection device 111 is electrically connected to the first conductive section 110 and the second conductive section 120; the overcurrent protection device 111 is used to disconnect the electrical connection between the output terminal of the first conductive section 110 and the second conductive section 120 when the current is greater than the safe value.

[0053] In this embodiment, the overcurrent protection device 111 extends along the second direction, one end of the overcurrent protection device 111 is directly electrically connected to the first conductive segment 110 (e.g., the two are in conductive contact or welded connection), and the other end of the overcurrent protection device 111 is directly electrically connected to the second conductive segment 120 (e.g., the two are in conductive contact or welded connection).

[0054] Alternatively, in some possible embodiments, the overcurrent protection device 111 extends along a first direction, with one end of the overcurrent protection device 111 directly electrically connected to the first conductive segment 110 (e.g., conductive contact or welding connection between the two), and the other end of the overcurrent protection device 111 directly electrically connected to the second conductive segment 120 (e.g., conductive contact or welding connection between the two).

[0055] Alternatively, in some possible embodiments, the overcurrent protection device 111 extends along a first direction, and the first conductive segment 110 includes two first conductive bus bodies 112. One end of the overcurrent protection device 111 is directly electrically connected to one of the two first conductive bus bodies 112 (e.g., conductive contact or welding between them), and the other end of the overcurrent protection device 111 is directly electrically connected to the other of the two first conductive bus bodies 112 (e.g., conductive contact or welding between them); that is, the overcurrent protection device 111 is connected in series between the two first conductive bus bodies 112.

[0056] It should be noted that the second conductive segment 120 is used to make an electrical connection with a conductive position (e.g., a positive conductive position). For example, the second conductive segment 120 can be a copper busbar, an aluminum busbar, or a silver-plated copper busbar.

[0057] The current sensor 130 is connected to the first conductive segment 110 and is used to detect the current flowing through the first conductive segment 110.

[0058] It should be noted that the overcurrent protection device 111 refers to a device that disconnects the circuit when the current exceeds a safe threshold. In this embodiment, the overcurrent protection device 111 is a fuse. In some possible embodiments, the overcurrent protection device 111 can be a miniature circuit breaker, a resettable fuse (i.e., a polymer positive temperature coefficient thermistor), or an electronic fuse (eFuse / Active MOSFET-Based Protector), etc.

[0059] It should be noted that the current sensor 130 refers to a device used to detect current values. For example, the current sensor 130 can be a contact current sensor or an inductive current sensor (e.g., a current transformer, a Hall effect sensor, a Roche coil, a fluxgate sensor, or a magnetoresistive sensor, etc.).

[0060] The photovoltaic inverter busbar assembly 100 provided in this application embodiment integrates the functions of current transmission, overcurrent protection and current monitoring.

[0061] In the current transmission: the second conductive segment 120 is used to electrically connect the corresponding output position. The second conductive segment 120 extends along the second direction to further collect and transmit the current to the first conductive segment 110. The first conductive bus body 112 of the first conductive segment 110 extends along the first direction. The first conductive segment 110 is used to connect with an external interface to transmit current.

[0062] Overcurrent protection: The overcurrent protection device 111 is integrated into the first conductive section 110. When the current exceeds the safety threshold, the overcurrent protection device 111 disconnects the electrical connection between the first conductive section 110 and the second conductive section 120 by mechanical or electronic means, and cuts off the circuit to ensure the safety of the current transmitted by the inverter.

[0063] The current sensor 130 detects the current value flowing through the first conductive segment 110 by direct contact (e.g., in series between two first conductive busbar bodies 112) or by non-contact means (e.g., sleeved on the first conductive busbar body 112), and is used to feed the detection signal back to the control system.

[0064] The photovoltaic inverter busbar assembly 100 provided in this application solves the problem of low integration caused by the separate design in the prior art by directly integrating the overcurrent protection device 111 and the current sensor 130 into the conductive path. The overcurrent protection device 111 disconnects the circuit mechanically or electronically when the current exceeds the safety threshold, cutting off the current transmission path to protect the electrical equipment. The current sensor 130 monitors the current value in real time through direct contact or non-contact methods and feeds the detection signal back to the control system. The integrated design reduces the number of external components, lowers system complexity and the risk of connection point failures, and optimizes space utilization, making the photovoltaic inverter busbar assembly 100 more compact. Through the above technical means, this application embodiment achieves the technical effects of functional integration, structural compactness, and performance stability in the electrical connection of photovoltaic inverters, providing an efficient and reliable solution for high power density inverters.

[0065] In some embodiments, the current sensor 130 is a contact current sensor, and the contact current sensor and the overcurrent protection device 111 are connected in series between the first conductive bus body 112 and the second conductive section 120.

[0066] It should be noted that a contact current sensor refers to a sensor that measures current by directly contacting a conductive path, and is typically connected in series in a circuit; for example, a contact current sensor can be a shunt or a resistive sensor. Alternatively, the current sensor 130 is a contact current sensor, and the first conductive segment 110 includes two first conductive bus bodies 112, with the contact current sensor and the overcurrent protection device 111 connected in series between the two first conductive bus bodies 112.

[0067] In this embodiment, the contact sensor ensures measurement accuracy through a series connection, making it suitable for high-precision control scenarios. Furthermore, this embodiment reduces the number of external components through integrated design, which helps to improve the overall conductivity path stability of the busbar assembly 100 for photovoltaic inverters.

[0068] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the current sensor 130 is an inductive current sensor, which is sleeved on the overcurrent protection device 111 or the first busbar body 112. The inductive sensor reduces interference to the conductive path through a non-contact method, making it suitable for scenarios with high reliability requirements. Furthermore, this embodiment reduces the number of external components through integrated design, which helps to improve the overall conductive path stability of the busbar assembly 100 for photovoltaic inverters.

[0069] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the overcurrent protection device 111 has a first ear plate 1111 and a second ear plate 1112. The first ear plate 1111 is in conductive contact with the first conductive bus body 112, and the second ear plate 1112 is in conductive contact with the second conductive segment 120. Alternatively, the first conductive segment 110 includes two first conductive bus bodies 112. The overcurrent protection device 111 has a first ear plate 1111 and a second ear plate 1112. The first ear plate 1111 is in conductive contact with one of the two first conductive bus bodies 112, and the second ear plate 1112 is in conductive contact with the other of the two first conductive bus bodies 112. The first conductive segment 110 is in conductive contact with the second conductive segment 120 through the first conductive bus body 112 that is in conductive contact with the second ear plate 1112.

[0070] It should be noted that the first ear plate 1111 and the second ear plate 1112 refer to metal sheet structures used for conductive connection, which can be fixed by welding or fasteners (e.g., bolts, screws, or rivets). For example, the first ear plate 1111 and the second ear plate 1112 can be copper ear plates, tin-plated copper plates, etc.

[0071] In this embodiment, the overcurrent protection device 111 makes conductive contact with the first conductive bus body 112 through the first ear plate 1111, and the second ear plate 1112 makes conductive contact with the second conductive segment 120, thereby connecting the current path. In the scheme where the first conductive segment 110 includes two first conductive bus bodies 112, the overcurrent protection device 111 is electrically connected to one of the first conductive bus bodies 112 through the first ear plate 1111, and the overcurrent protection device 111 is electrically connected to the other first conductive bus body 112 through the second ear plate 1112, thereby ensuring the stability of the current path.

[0072] In this embodiment, the optimized design of the first ear plate 1111 and the second ear plate 1112 achieves a highly reliable connection between the overcurrent protection device 111 and the conductive path. The conductive contact method of the first ear plate 1111 and the second ear plate 1112 reduces the connection resistance and improves the current transmission efficiency.

[0073] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, at least one first conductive bus body 112 has a first bend 1121, which is used to place the portions of the first conductive bus body 112 located at both ends of the first bend 1121 at different heights.

[0074] It should be noted that the first bending portion 1121 refers to the structure formed by bending, which is used to adjust the height of the component. For example, the first bending portion 1121 is "L" shaped.

[0075] In this embodiment, the height of the first conductive bus body 112 is adjusted by the first bending part 1121 so that the two ends of the conductive path are on different planes, which facilitates the connection with external interfaces, circuit boards or other components. At the same time, the first bending part 1121 increases the contact area with air and assists in heat dissipation.

[0076] In this embodiment, the structural design of the first bending portion 1121 optimizes the height adaptability and heat dissipation performance of the busbar assembly for photovoltaic inverters. The height adjustment function facilitates connection with external components of different layouts, and the geometric features of the first bending portion 1121 reduce temperature rise by increasing the heat dissipation surface area, thus helping to improve the long-term operational stability of the busbar assembly for photovoltaic inverters.

[0077] Reference Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the second conductive segment 120 has a first through hole 121 for passing through a first fastener 701, which is used to mount the second conductive segment 120 to the component to be connected. Exemplarily, the first through hole 121 is circular. In this embodiment, by providing the first through hole 121, the second conductive segment 120 can facilitate a detachable connection between itself and the component to be connected.

[0078] Reference Figure 1 and Figure 7 As shown, in some embodiments, the axis of the first through hole 121 is located on one side of the first reference surface 122, the first reference surface 122 is perpendicular to the width direction of the second conductive segment 120, and the first reference surface 122 passes through the center line of the length direction of the second conductive segment 120. It should be noted that in the reference surface perpendicular to the axis of the first through hole 121, the two sides of the projection of the second conductive segment 120 in the length direction are symmetrical about the center line of the length direction of the second conductive segment 120.

[0079] It is understandable that the first reference surface 122 is the midpoint of the width of the second conductive segment 120. In this embodiment, by setting the axis of the first through hole 121 on one side of the first reference surface 122, it helps to reduce the size of the side where the axis of the first through hole 121 of the second conductive segment 120 is located, and helps to increase the distance between this side of the second conductive segment 120 and the adjacent components, thus helping to avoid short circuit problems.

[0080] Reference Figures 1 to 6 As shown, the circuit board assembly 1000 provided in this application embodiment may include a circuit board body 200, a terminal block assembly 300, a negative electrode busbar 400, and the aforementioned busbar assembly 100 for photovoltaic inverters.

[0081] The circuit board body 200 includes a positive output position 201 and a negative output position 202; for example, the positive output position 201 and the negative output position 202 are formed on copper foil.

[0082] The terminal block assembly 300 includes a positive output terminal 310, a positive input terminal 320, a negative output terminal 330, and a negative input terminal 340. The positive output terminal 310 is used for electrical connection to an external interface; the positive input terminal 320 is electrically connected to the positive output terminal 310; the negative output terminal 330 is used for electrical connection to an external interface; and the negative input terminal 340 is electrically connected to the negative output terminal 330.

[0083] For example, the positive output terminal 310 and the negative output terminal 330 each include a fastener, which is configured to detachably fasten a conductive element such as a wire or busbar used for connecting to an external interface to the positive output terminal 310 or the negative output terminal 330.

[0084] A positive electrode conductive bus is constructed using a conductive bus assembly 100 in a photovoltaic inverter. The positive electrode conductive bus is electrically connected to both the positive output position 201 and the positive input position 320 to conduct electricity between them. For example, the positive electrode conductive bus is electrically connected to the positive output position 201 via a second conductive segment 120. For instance, the first conductive bus body 112 is made of copper, aluminum, or silver-plated copper, and the copper, aluminum, or silver-plated copper bus can be connected to the positive output position 201 via an intermediate support and electrical connection component; alternatively, in some possible embodiments, the positive output position 201 protrudes from the circuit board body 200, and the corresponding position of the copper, aluminum, or silver-plated copper bus is soldered to the protruding positive output position 201. The positive electrode conductive bus is electrically connected to the positive input position 320 via a first conductive segment 110, and for example, the first conductive segment 110 is detachably connected to the positive input position 320 via fasteners.

[0085] The negative electrode busbar 400 is electrically connected to the negative electrode output position 202 and the negative electrode input position 340 respectively, so as to conduct electricity between the negative electrode busbar 400 and the negative electrode output position 202.

[0086] The circuit board assembly 1000 provided in this application embodiment includes a terminal block assembly 300 comprising a positive output terminal 310, a positive input terminal 320, a negative output terminal 330, and a negative input terminal 340, and a conductive bus assembly 100 for a photovoltaic inverter provided in this application embodiment. The positive conductive bus is electrically connected to the positive output position 201 and the positive input terminal 320, and the negative conductive bus 400 is electrically connected to the negative output position 202 and the negative input terminal 340, respectively. This facilitates the conductive connection of external interfaces through the positive output terminal 310 to the positive output position 201 and through the negative output terminal 330 to the negative output position 202, thereby solving the problem of difficulty in connecting the two types of output positions, positive output position 201 and negative output position 202, to external interfaces. Furthermore, by utilizing the advantages of high current carrying capacity, low impedance, rigid structure, and easy installation of the positive and negative conductive busbars 400, it helps to improve the safety, service life, and structural compactness of the circuit board assembly 1000. It also helps to reduce resistive heating of the circuit board assembly 1000 to reduce the energy consumption of the circuit board assembly 1000, and also helps to reduce the processing difficulty of the circuit board assembly 1000.

[0087] Furthermore, by incorporating the aforementioned photovoltaic inverter busbar assembly 1000, the overcurrent protection device 111 directly disconnects the circuit when the current exceeds the safety threshold, preventing damage to external electrical equipment due to short circuits or overloads. Simultaneously, the current sensor 130 monitors the current value in real time and provides feedback signals for system control. This helps to improve the safety of the circuit board assembly 1000 in supplying power to external devices.

[0088] Reference Figure 2 As shown, in some embodiments, the negative electrode bus 400 includes a first negative electrode conductive segment 410 extending along a first direction and a second negative electrode conductive segment 420 extending along a second direction. The projections of the positive electrode bus and the negative electrode bus 400 in a second reference plane are spaced apart from each other, and the second reference plane is parallel to the first and second directions. The negative electrode bus 400 is electrically connected to the negative electrode output position 202 through the second negative electrode conductive segment 420. For example, the second negative electrode conductive segment 420 can be a copper bus, an aluminum bus, or a silver-plated copper bus. The negative electrode output position 202 may be provided with a component for supporting and electrically connecting the second negative electrode conductive segment 420, and the second negative electrode conductive segment 420 can be welded or detachably connected to this component. Alternatively, in some possible embodiments, the second negative electrode conductive segment 420 is directly welded to the corresponding negative electrode output position 202.

[0089] The positive electrode busbar is electrically connected to the positive input terminal 320 via a first conductive segment 110. For example, the first conductive segment 110 is detachably connected to the positive input terminal 320 via fasteners such as bolts or screws. The negative electrode busbar 400 is electrically connected to the negative input terminal 340 via a first negative electrode conductive segment 410. For example, the first negative electrode conductive segment 410 is detachably connected to the negative input terminal 340 via fasteners such as bolts or screws.

[0090] In this embodiment, the design of "the projections of the positive electrode and the negative electrode 400 in the second reference plane are spaced apart" can avoid short circuits between the positive electrode and the negative electrode 400 and also help dissipate heat from the positive electrode and the negative electrode 400.

[0091] In some embodiments, the negative electrode conductive bus 400 has a second bend 401, which is used to place the portions of the negative electrode conductive bus 400 located at the two ends of the second bend 401 at different heights.

[0092] It should be noted that the second bend 401 refers to a structure formed by bending, used to adjust the height or orientation of the component. For example, the second bend 401 is an L-shaped bend.

[0093] In this embodiment, the height is adjusted by the second bending portion 401 so that the two ends of the conductive path of the negative electrode conductive bus 400 are on different planes, which facilitates the connection with the external interface. At the same time, the second bending portion 401 increases the contact area with the air, which helps to dissipate heat.

[0094] Understandably, this embodiment achieves optimized height adaptability and heat dissipation performance of the negative electrode busbar 400 through the structural design of the second bending portion 401. The height adjustment function facilitates connection with external components of different layouts, and the geometric features of the second bending portion 401 reduce temperature rise by increasing the heat dissipation surface area, thereby improving the long-term operational stability of the circuit board assembly 1000.

[0095] Reference Figure 2 , Figure 3 and Figure 7 As shown, in some embodiments, the circuit board assembly 1000 may further include a magnetic ring 500, which is sleeved on the first conductive segment 110 and the first negative conductive segment 410.

[0096] It should be noted that the magnetic ring 500 is used to suppress electromagnetic interference (EMI), and the magnetic ring 500 can be made of ferrite material. For example, the magnetic ring 500 can be a ferrite magnetic ring or a nickel-zinc magnetic ring, etc. By being fitted onto a conductive path, the magnetic ring 500 utilizes its high permeability to absorb high-frequency electromagnetic interference, reducing the impact of current harmonics on the control circuit.

[0097] In this embodiment, active suppression of electromagnetic interference is achieved through the integrated design of the magnetic ring 500. The sleeve structure of the magnetic ring 500 works in conjunction with the conductive path to improve the stability and safety of the DC power output by the circuit board assembly 1000.

[0098] For example, the magnetic ring 500 can be sleeved on the first conductive segment 110 and the first negative conductive segment 410 by a plastic bracket. The magnetic ring 500 is disposed on the plastic bracket, and the plastic bracket is fastened to the first conductive segment 110 by screws. The plastic bracket is fastened to the first negative conductive segment 410 by screws.

[0099] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the circuit board assembly 1000 may further include a first conductive post 610 and a second conductive post 620, with the second conductive segment 120 and the positive output position 201 electrically connected through the first conductive post 610; and the second negative conductive segment 420 and the negative output position 202 electrically connected through the second conductive post 620.

[0100] It should be noted that the first conductive post 610 and the second conductive post 620 refer to conductive elements used to connect the conductive busbar to the external interface, and are typically metal columnar structures. For example, the first conductive post 610 and the second conductive post 620 are copper posts or silver-plated copper posts.

[0101] This embodiment facilitates heat dissipation for the second conductive segment 120 and the second negative conductive segment 420. Furthermore, it creates a gap between the corresponding portions of the second conductive segment 120 and the second negative conductive segment 420 and the circuit board body 200, preventing potential short circuits. In some possible embodiments, the corresponding positions of the second conductive segment 120 can be directly connected to the positive output position 201, for example, by direct soldering, or by direct conductive contact and fastening with corresponding fasteners; similarly, the corresponding positions of the second negative conductive segment 420 can be directly connected to the negative output position 202, for example, by direct soldering, or by direct conductive contact and fastening with corresponding fasteners.

[0102] In some embodiments, the first conductive post 610 is detachably connected to the second conductive segment 120, and the first conductive post 610 is welded to the positive output position 201; the second conductive post 620 is detachably connected to the second negative conductive segment 420, and the second conductive post 620 is welded to the negative output position 202.

[0103] The first conductive post 610 is connected to the second conductive segment 120 via a detachable connection (such as a thread); the second conductive post 620 is connected to the second negative conductive segment 420 via a detachable connection (such as a thread), thus achieving a modular connection that facilitates maintenance and replacement.

[0104] This embodiment improves the maintenance convenience of the circuit board assembly 1000 through the detachable design of the first conductive post 610 and the second conductive segment 120, and the detachable design of the second conductive post 620 and the second negative conductive segment 420. The modular connection method reduces the need for overall disassembly, lowers maintenance costs, and the welding fixation ensures the reliability of the connection, avoiding loosening of contacts due to vibration or thermal expansion.

[0105] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the circuit board assembly 1000 may further include a first fastener 701 and a second fastener 702; the second conductive segment 120 has a first through hole 121, and the second negative conductive segment 420 has a second through hole 421. The first conductive post 610 has a first threaded hole 611, and the first fastener 701 is used to pass through the first through hole 121 and be threadedly connected to the first threaded hole 611, and the first conductive post 610 and the second conductive segment 120 are detachably connected by the first fastener 701. The second conductive post 620 has a second threaded hole 621, and the second negative conductive segment 420 has a second through hole 421, and the second fastener 702 is used to pass through the second through hole 421 and be threadedly connected to the second threaded hole 621, and the second conductive post 620 and the second negative conductive segment 420 are detachably connected by the second fastener 702.

[0106] In this embodiment, the first fastener 701 secures the second conductive segment 120 and the first conductive post 610, pressing the side of the second conductive segment 120 facing the first conductive post 610 against the first conductive post 610 to ensure a large contact area between them, thus providing good conductivity. Furthermore, removing the first fastener 701 disconnects the connection between the second conductive segment 120 and the first conductive post 610.

[0107] Understandably, the second fastener 702 secures the second negative conductive segment 420 and the second conductive post 620 together, pressing the side of the second negative conductive segment 420 facing the second conductive post 620 against the second conductive post 620 to ensure sufficient contact area between them, thus providing good conductivity. Furthermore, removing the second fastener 702 disconnects the connection between the second negative conductive segment 420 and the second conductive post 620.

[0108] Reference Figure 7 As shown, in some embodiments, the axis of the first through hole 121 is located on the side of the first reference surface 122 facing the second negative conductive segment 420, the first reference surface 122 is perpendicular to the width direction of the second conductive segment 120, and the first reference surface 122 passes through the center line of the length direction of the second conductive segment 120.

[0109] Understandably, the first reference surface 122 is the midpoint of the width of the second conductive segment 120. In this embodiment, by setting the axis of the first through hole 121 on the side of the first reference surface 122 facing the second negative conductive segment 420, it helps to increase the spacing between the second conductive segment 120 and the second negative conductive segment 420. In this way, the risk of short circuit between the second conductive segment 120 and the second negative conductive segment 420 can be reduced, which helps to improve the safety performance of the circuit board assembly 1000.

[0110] In some embodiments, the axis of the second through hole 421 is located on the side of the third reference surface 422 facing the second conductive segment 120. The third reference surface 422 is perpendicular to the width direction of the second negative conductive segment 420 and passes through the center line of the length direction of the second negative conductive segment 420. It should be noted that in the reference surface perpendicular to the axis of the second through hole 421, the two length-direction edges of the projection of the second negative conductive segment 420 are symmetrical about the center line of the length direction of the second negative conductive segment 420.

[0111] Understandably, the third reference surface 422 is the midpoint of the width of the second negative conductive segment 420. In this embodiment, by setting the axis of the second through hole 421 on the side of the third reference surface 422 facing the second conductive segment 120, it helps to increase the spacing between the second conductive segment 120 and the second negative conductive segment 420. In this way, the risk of short circuit between the second conductive segment 120 and the second negative conductive segment 420 can be reduced, which helps to improve the safety performance of the circuit board assembly 1000.

[0112] Reference Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the terminal block assembly 300 further includes a terminal block 350, on which a positive output terminal 310, a positive input terminal 320, a negative output terminal 330, and a negative input terminal 340 are disposed.

[0113] The positive input terminal 320 and the negative input terminal 340 are located on the side of the terminal block 350 near the positive and negative conductive busbars 400. This facilitates the connection of the positive input terminal 320 to the positive conductive busbar and the connection of the negative input terminal 340 to the negative conductive busbar 400.

[0114] The positive output terminal 310 and the negative output terminal 330 are located on the side of the terminal block 350 away from the positive and negative conductive busbars 400. This facilitates the connection of the positive output terminal 310 and the negative output terminal 330 to external interfaces.

[0115] For example, the terminal block 350 is made of insulating material and includes a partition 351. The positive output terminal 310 and the positive input terminal 320 are located on one side of the partition 351; the negative output terminal 330 and the negative input terminal 340 are located on the other side of the partition 351. Thus, positive and negative isolation is formed by the partition 351 to prevent short circuits in the terminal assembly 300.

[0116] For example, the terminal block 350 is provided with a first conductive plate and a second conductive plate. The first conductive plate is disposed between the positive output terminal 310 and the positive input terminal 320, and is used to electrically connect the positive output terminal 310 and the positive input terminal 320. The second conductive plate is disposed between the negative output terminal 330 and the negative input terminal 340, and is used to electrically connect the negative output terminal 330 and the negative input terminal 340.

[0117] Reference Figures 1 to 9 As shown, a photovoltaic inverter provided in this application embodiment includes a photovoltaic inverter busbar assembly 100 provided in this application embodiment, or a circuit board assembly 1000 provided in this application embodiment.

[0118] The photovoltaic inverter, by setting up the photovoltaic inverter busbar assembly 100 or circuit board assembly 1000 provided in this application embodiment, facilitates external wiring, and the overcurrent protection device 111 directly disconnects the circuit when the current exceeds the safety threshold, avoiding equipment damage due to short circuit or overload. At the same time, the current sensor 130 monitors the current value in real time and provides feedback signals for system control, which helps to improve the safety of the photovoltaic inverter itself, the safety of external power supply, and the service life of the photovoltaic inverter, and also helps to improve the compactness of the photovoltaic inverter structure.

[0119] For example, a photovoltaic inverter includes an inverter component for converting direct current (DC) to alternating current (AC); for instance, the inverter component is used to convert the DC power from the batteries of a photovoltaic system into AC power, which the photovoltaic inverter then uses to supply AC power to external systems.

[0120] The circuit board assembly 1000 also includes a rectifier assembly disposed on the circuit board body 200. The rectifier assembly is configured to rectify multiple AC currents (e.g., AC current generated by photovoltaic power generation and inverted) into DC currents, and output each DC current through the corresponding positive output position 201 and negative output position 202 of the circuit board assembly 1000. The positive output terminal 310 and negative output terminal 330 of the terminal block assembly 300 are connected to the battery, and the photovoltaic inverter uses this to supply DC current to charge the battery.

[0121] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0122] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A busbar assembly for a photovoltaic inverter, characterized in that, include: A first conductive segment (110) extending along a first direction and a second conductive segment (120) extending along a second direction, the first direction intersecting the second direction; wherein, the first conductive segment (110) includes at least one first conductive bus body (112). An overcurrent protection device (111) is electrically connected to the first conductive segment (110) and the second conductive segment (120). The overcurrent protection device (111) is used to disconnect the electrical connection between the output terminal of the first conductive segment (110) and the second conductive segment (120) when the current is greater than the safe value. A current sensor (130) is connected to the first conductive segment (110) and the current sensor (130) is used to detect the current flowing through the first conductive segment (110).

2. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, The current sensor (130) is a contact current sensor, and the contact current sensor and the overcurrent protection device (111) are connected in series between the first conductive bus body (112) and the second conductive segment (120).

3. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, The current sensor (130) is a contact current sensor. The first conductive segment (110) includes two first conductive bus bodies (112). The contact current sensor and the overcurrent protection device (111) are connected in series between the two first conductive bus bodies (112).

4. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, The current sensor (130) is an inductive current sensor, which is sleeved on the overcurrent protection device (111) or the first conductive bus body (112).

5. The busbar assembly for a photovoltaic inverter according to claim 4, characterized in that, The overcurrent protection device (111) has a first ear plate (1111) and a second ear plate (1112). The first ear plate (1111) is in conductive contact with the first conductive bus body (112), and the second ear plate (1112) is in conductive contact with the second conductive segment (120).

6. The busbar assembly for a photovoltaic inverter according to claim 4, characterized in that, The first conductive segment (110) includes two first conductive busbar bodies (112). The overcurrent protection device (111) has a first ear plate (1111) and a second ear plate (1112). The first ear plate (1111) is in conductive contact with one of the two first conductive busbar bodies (112), and the second ear plate (1112) is in conductive contact with the other of the two first conductive busbar bodies (112). The first conductive segment (110) is in conductive contact with the second conductive segment (120) through the first conductive busbar body (112) which is in conductive contact with the second ear plate (1112).

7. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, At least one of the first conductive bus body (112) has a first bend (1121) for placing portions of the first conductive bus body (112) located at both ends of the first bend (1121) at different heights.

8. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, The second conductive segment (120) has a first through hole (121) for inserting a first fastener (701) for mounting the second conductive segment (120) to the component to be connected.

9. The busbar assembly for a photovoltaic inverter according to claim 8, characterized in that, The axis of the first through hole (121) is located on one side of the first reference surface (122), the first reference surface (122) is perpendicular to the width direction of the second conductive segment (120), and the first reference surface (122) passes through the center line of the length direction of the second conductive segment (120).

10. A circuit board assembly, characterized in that, include: The circuit board body (200) includes a positive output position (201) and a negative output position (202). Terminal block assembly (300) includes: The positive output terminal (310) is used for electrical connection to an external interface; Positive input terminal (320) electrically connected to the positive output terminal (310); The negative output terminal (330) is used for electrical connection to an external interface; The negative input terminal (340) is electrically connected to the negative output terminal (330). The photovoltaic inverter busbar assembly according to any one of claims 1-9, wherein the photovoltaic inverter busbar assembly constitutes a positive electrode busbar; the positive electrode busbar is electrically connected to the positive electrode output terminal (201) and the positive electrode input terminal (320) respectively; The negative electrode busbar (400) is electrically connected to the negative electrode output position (202) and the negative electrode input position (340), respectively.

11. The circuit board assembly according to claim 10, characterized in that, The negative electrode conductive bus (400) includes a first negative electrode conductive segment (410) extending along the first direction and a second negative electrode conductive segment (420) extending along the second direction; wherein, the projections of the positive electrode conductive bus and the negative electrode conductive bus (400) in a second reference plane are spaced apart from each other, and the second reference plane is parallel to the first direction and the second direction; the negative electrode conductive bus (400) is electrically connected to the negative electrode output position (202) through the second negative electrode conductive segment (420), and the positive electrode conductive bus is electrically connected to the positive electrode input terminal (320) through the first conductive segment (110); the negative electrode conductive bus (400) is electrically connected to the negative electrode input terminal (340) through the first negative electrode conductive segment (410); And / or, the negative electrode conductive bus (400) has a second bend (401) for placing portions of the negative electrode conductive bus (400) located at both ends of the second bend (401) at different heights.

12. The circuit board assembly according to claim 11, characterized in that, It also includes a magnetic ring (500), which is sleeved on the first conductive segment (110) and the first negative conductive segment (410).

13. The circuit board assembly according to claim 11, characterized in that, It also includes a first conductive post (610) and a second conductive post (620), the second conductive segment (120) and the positive output position (201) being electrically connected through the first conductive post (610); the second negative conductive segment (420) and the negative output position (202) being electrically connected through the second conductive post (620).

14. The circuit board assembly according to claim 13, characterized in that, The first conductive post (610) is detachably connected to the second conductive segment (120), and the first conductive post (610) is welded to the positive output position (201); The second conductive post (620) is detachably connected to the second negative electrode conductive segment (420), and the second conductive post (620) is welded to the negative electrode output position (202).

15. The circuit board assembly according to claim 14, characterized in that, It includes a first fastener (701) and a second fastener (702); the second conductive segment (120) has a first through hole (121), and the second negative electrode conductive segment (420) has a second through hole (421); The first conductive post (610) has a first threaded hole (611), and the first fastener (701) is used to pass through the first through hole (121) and be threadedly connected to the first threaded hole (611). The first conductive post (610) and the second conductive segment (120) are detachably connected through the first fastener (701). The second conductive post (620) has a second threaded hole (621), the second negative conductive segment (420) has a second through hole (421), the second fastener (702) is used to pass through the second through hole (421) and be threadedly connected to the second threaded hole (621), and the second conductive post (620) and the second negative conductive segment (420) are detachably connected by the second fastener (702).

16. The circuit board assembly according to claim 15, characterized in that, The axis of the first through hole (121) is located on the side of the first reference surface (122) facing the second negative electrode conductive segment (420). The first reference surface (122) is perpendicular to the width direction of the second conductive segment (120). The first reference surface (122) passes through the center line of the length direction of the second conductive segment (120). And / or, the axis of the second through hole (421) is located on the side of the third reference surface (422) facing the second conductive segment (120), the third reference surface (422) is perpendicular to the width direction of the second negative conductive segment (420), and the third reference surface (422) passes through the center line of the length direction of the second negative conductive segment (420).

17. The circuit board assembly according to claim 10, characterized in that, The terminal assembly (300) further includes a terminal block (350), wherein the positive output terminal (310), the positive input terminal (320), the negative output terminal (330), and the negative input terminal (340) are disposed on the terminal block (350), the positive input terminal (320) and the negative input terminal (340) are disposed on the side of the terminal block (350) close to the positive conductive bus and the negative conductive bus (400), and the positive output terminal (310) and the negative output terminal (330) are disposed on the side of the terminal block (350) away from the positive conductive bus and the negative conductive bus (400).

18. A photovoltaic inverter, characterized in that, include: The busbar assembly for a photovoltaic inverter according to any one of claims 1 to 9, or the circuit board assembly according to any one of claims 10 to 17.

Images