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

Abstract

Embodiments of the present application provide a kind of photovoltaic inverter with electrically conductive row assembly, circuit board and photovoltaic inverter.The photovoltaic inverter with electrically conductive row assembly includes: positive electrode electrically conductive row, including the first positive electrode electrically conductive section along the first direction and the second positive electrode electrically conductive section along the second direction;Negative electrode electrically conductive row, including the first negative electrode electrically conductive section along the first direction and the second negative electrode electrically conductive section along the second direction;Positive electrode electrically conductive row and the projection of negative electrode electrically conductive row in reference surface are mutually spaced;The side of second positive electrode electrically conductive section towards second negative electrode electrically conductive section is equipped with first connecting part, the side of second negative electrode electrically conductive section towards second positive electrode electrically conductive section is equipped with second connecting part, and first connecting part and second connecting part are alternately and spaced in the second direction.This photovoltaic inverter with electrically conductive row assembly can be used to solve the problem that positive electrode output bit and negative electrode output bit are difficult to connect with external interface in related art.

Description

Technical Field

[0001] This application relates to the field of new energy technology, and in particular to a busbar assembly, circuit board 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 positive output terminals and multiple negative output terminals.

[0003] In related technologies, the external interface is located a considerable distance from the positive and negative output bits. Therefore, connecting the positive and negative output bits to the external interface presents a challenge. Utility Model Content

[0004] This application provides a busbar assembly, circuit board, and photovoltaic inverter for a photovoltaic inverter, which solves the problem of difficulty in connecting the positive and negative output terminals to external interfaces.

[0005] In a first aspect, this application provides a busbar assembly for a photovoltaic inverter, comprising: a positive busbar including a first positive conductive segment extending along a first direction and a second positive conductive segment extending along a second direction, the first direction intersecting the second direction; a negative busbar including a first negative conductive segment extending along the first direction and a second negative conductive segment extending along the second direction; the projections of the positive busbar and the negative busbar in a reference plane are spaced apart from each other, the reference plane being parallel to the first direction and the second direction; a first connecting portion is provided on the side of the second positive conductive segment facing the second negative conductive segment, and a second connecting portion is provided on the side of the second negative conductive segment facing the second positive conductive segment, the first connecting portion and the second connecting portion being alternately and spaced apart in the second direction.

[0006] In some embodiments, the positive electrode busbar has a first bend, the first bend being used to place portions of the positive electrode busbar located at both ends of the first bend at different heights; and / or, the negative electrode busbar has a second bend, the second bend being used to place portions of the negative electrode busbar located at both ends of the second bend at different heights.

[0007] In some embodiments, the busbar assembly for photovoltaic inverters further includes an overcurrent protection device, wherein the second positive conductive section and the first positive conductive section are electrically connected through the overcurrent protection device; the overcurrent protection device is used to disconnect the electrical connection between the second positive conductive section and the first positive conductive section when the current exceeds a safe value.

[0008] In some embodiments, the overcurrent protection device is detachably connected to the second positive conductive segment, and the overcurrent protection device is detachably connected to the first positive conductive segment.

[0009] In some embodiments, the overcurrent protection device includes an overcurrent protection device body and a first ear plate and a second ear plate electrically connected to the overcurrent protection device body; the first ear plate is in conductive contact with the first positive conductive segment, and the second ear plate is in conductive contact with the second positive conductive segment.

[0010] In some embodiments, the photovoltaic inverter busbar assembly further includes a current sensor for detecting the current flowing through the positive busbar; the current sensor is mounted on the overcurrent protection device.

[0011] In some embodiments, the photovoltaic inverter busbar assembly further includes a magnetic ring, which is sleeved on the first positive electrode conductive section and the first negative electrode conductive section.

[0012] In the photovoltaic inverter busbar assembly provided in this application embodiment, the positive busbar can be connected to the positive output position through the first connecting part, and the negative busbar can be connected to the negative output position through the second connecting part. This allows the photovoltaic inverter busbar assembly to establish electrical connections between each positive output position and the first positive conductive segment, and between each negative output position and the first negative conductive segment. This enables centralized external electrical connections through the first positive and first negative conductive segments, thus solving the problem of difficulty in connecting the positive and negative output positions to external interfaces in related technologies. Furthermore, the layout features of the first connecting part facing the second negative conductive segment, the second connecting part facing the second positive conductive segment, and the alternating and spaced arrangement of the first and second connecting parts in the second direction, can prevent interference or excessive proximity between the positive and negative busbars, avoiding short circuits.

[0013] Secondly, embodiments of this application provide a circuit board, comprising: 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, wherein the positive busbar is electrically connected to the corresponding positive output position through a first connecting portion; the negative busbar is electrically connected to the corresponding negative output position through a second connecting portion; the positive busbar is electrically connected to the positive input terminal through a first positive conductive segment; and the negative busbar is electrically connected to the negative input terminal through a first negative conductive segment.

[0014] In some embodiments, the circuit board further includes a first conductive post and a second conductive post; the first connection portion and the positive output position are electrically connected through the first conductive post; the second connection portion and the negative output position are electrically connected through the second conductive post.

[0015] In some embodiments, the first conductive post is detachably connected to the first connecting portion, and the first conductive post is welded to the positive output position; the second conductive post is detachably connected to the second connecting portion, and the second conductive post is welded to the negative output position.

[0016] In some embodiments, the circuit board further includes a first fastener and a second fastener; the first conductive post has a first threaded hole, the first connecting portion has a first through hole, 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 first connecting portion are detachably connected by the first fastener; the second conductive post has a second threaded hole, the second connecting portion has a second through hole, 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 connecting portion are detachably connected by the second fastener.

[0017] 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.

[0018] In some embodiments, the photovoltaic inverter busbar assembly includes an overcurrent protection device, wherein the second positive conductive segment and the first positive conductive segment are electrically connected through the overcurrent protection device; the overcurrent protection device is used to disconnect the electrical connection between the second positive conductive segment and the first positive conductive segment when the current exceeds a safe value; the overcurrent protection device is detachably connected to the second positive conductive segment and the first positive conductive segment; the overcurrent protection device includes an overcurrent protection device body and a first ear plate and a second ear plate electrically connected to the overcurrent protection device body; the first ear plate is in conductive contact with the first positive conductive segment, and the second ear plate is in conductive contact with the second positive conductive segment; the circuit board further includes: a first support member disposed on the circuit board body, the first support member having A first support surface, which supports one end of the first positive conductive segment used to connect to the overcurrent protection device, wherein the first ear plate is in conductive contact with the side of the first positive conductive segment opposite to the first support surface; a second support member disposed on the circuit board body, the second support member having a second support surface, which supports one end of the second positive conductive segment used to connect to the overcurrent protection device, wherein the second ear plate is in conductive contact with the side of the second positive conductive segment opposite to the second support surface; a third fastener connected to the first support member, the third fastener being used to fasten the first ear plate and the first positive conductive segment to the first support surface; and a fourth fastener connected to the second support member, the fourth fastener being used to fasten the second ear plate and the second positive conductive segment to the second support surface.

[0019] The circuit board provided in this application embodiment incorporates a photovoltaic inverter busbar assembly with terminal blocks including a positive output terminal, a positive input terminal, a negative output terminal, and a negative input terminal. The positive busbar is electrically connected to both the positive output terminal and the positive input terminal, and the negative busbar is electrically connected to both the negative output terminal and the negative input terminal. This facilitates conductive connections between external interfaces via the positive and negative output terminals, addressing the difficulty of connecting the positive and negative output terminals to external interfaces. Furthermore, by utilizing the high current carrying capacity, low impedance, rigid structure, and ease of installation of the positive and negative busbars, the circuit board's safety, lifespan, and structural compactness are improved. It also helps reduce resistive heating, thus lowering energy consumption, and reduces the difficulty of circuit board manufacturing.

[0020] Thirdly, embodiments of this application provide a photovoltaic inverter, including: the aforementioned photovoltaic inverter busbar assembly, or the aforementioned circuit board.

[0021] The photovoltaic inverter provided in this application embodiment facilitates external wiring by setting the aforementioned photovoltaic inverter busbar assembly or circuit board, and helps to improve the safety and service life of the photovoltaic inverter itself. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the circuit board structure provided in an embodiment of this application.

[0024] Figure 2 for Figure 1 The middle circle shows an enlarged view of part A.

[0025] Figure 3 for Figure 1 The middle circle shows an enlarged view of part B.

[0026] Figure 4 This is a schematic diagram of the circuit board provided in an embodiment of this application from another perspective.

[0027] Figure 5 This is a schematic diagram of the terminal block assembly provided in an embodiment of this application.

[0028] Figure 6 This is a schematic diagram of the structure of the magnetic ring frame provided in an embodiment of this application.

[0029] Figure 7 This is a cross-sectional structural diagram of the first part of the circuit board provided in an embodiment of this application.

[0030] Figure 8 This is a cross-sectional structural diagram of the second part of the circuit board provided in an embodiment of this application.

[0031] Figure 9 This is a cross-sectional structural diagram of the third part of the circuit board provided in an embodiment of this application.

[0032] Figure 10 This is a cross-sectional structural diagram of the fourth part of the circuit board provided in an embodiment of this application.

[0033] Figure 11 A schematic diagram of the internal structure of the photovoltaic inverter provided for the implementation of this application.

[0034] Explanation of reference numerals in the attached drawings: 10-Circuit board; 100-Positive conductive busbar; 110-First positive conductive segment; 120-Second positive conductive segment; 121-First connecting part; 1211-First through hole; 130-First bending part; 200-Negative conductive busbar; 210-First negative conductive segment; 220-Second negative conductive segment; 221-Second connecting part; 2211-Second through hole; 230-Second bending part; 300-Circuit board body; 301-Positive output position; 302-Negative output position; 400-Terminal assembly; 410-Positive output terminal; 420-Positive input terminal; 430-Negative output terminal; 440-Negative input terminal; 450-Terminal base; 4 51-Partition plate; 510-First conductive post; 511-First threaded hole; 520-Second conductive post; 521-Second threaded hole; 610-First fastener; 620-Second fastener; 630-Third fastener; 640-Fourth fastener; 650-Fifth fastener; 700-Overcurrent protection device; 710-Overcurrent protection device body; 720-First ear plate; 730-Second ear plate; 810-First support member; 811-First support surface; 820-Second support member; 821-Second support surface; 830-Third support member; 910-Current sensor; 920-Magnetic ring; 921-Magnetic ring body; 922-Magnetic ring frame; 9221-Receiving cavity.

[0035] 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

[0036] 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.

[0037] 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 positive output terminals and multiple negative output terminals.

[0038] For example, in a photovoltaic system, a photovoltaic inverter can be configured not only for inversion and rectification, but also for intelligent scheduling and safety control.

[0039] For example, taking the application of photovoltaic inverters in photovoltaic systems as an example: In photovoltaic mode, the photovoltaic inverter is used to convert the DC power generated by the photovoltaic modules into AC power available to the household / grid, i.e., the inverter function; in charging mode, the photovoltaic inverter is used to convert the AC power from the grid or photovoltaics into DC power for the battery photovoltaic system, i.e., the rectification function; in discharging mode, the DC power stored in the battery is converted into AC power for use by the load or fed back to the grid, i.e., the inverter function.

[0040] In related technologies, the external interface is located a considerable distance from the positive and negative output bits. Therefore, connecting the positive and negative output bits to the external interface presents a challenge.

[0041] To address the difficulty of connecting the positive and negative output positions to external interfaces, this application provides a conductive bus assembly, circuit board, and photovoltaic inverter. The positive conductive bus connects to the positive output position via a first connecting portion, and the negative conductive bus connects to the negative output position via a second connecting portion. This conductive bus assembly allows for the establishment of electrical connections between each positive output position and the first positive conductive segment, and between each negative output position and the first negative conductive segment. This centralized connection to the external interface via the first positive and first negative conductive segments solves the problem of difficult connection between the positive and negative output positions and external interfaces in related technologies. Furthermore, the layout features of the first connecting portion facing the second negative conductive segment, the second connecting portion facing the second positive conductive segment, and the alternating and spaced arrangement of the first and second connecting portions in a second direction prevent interference or excessive proximity between the positive and negative conductive busbars, thus avoiding short circuits.

[0042] Reference Figure 1 , Figure 4 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 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.

[0043] Reference Figure 1 and Figure 4 As shown in the embodiment of this application, the photovoltaic inverter busbar assembly includes a positive electrode busbar 100 and a negative electrode busbar 200.

[0044] The positive electrode conductive bus 100 includes a first positive electrode conductive segment 110 extending along a first direction and a second positive electrode conductive segment 120 extending along a second direction. The first direction intersects the second direction. In this embodiment, the first direction is perpendicular to the second direction, that is, in a reference plane parallel to the first and second directions, the projection of the positive electrode conductive bus 100 is approximately L-shaped. In some possible embodiments, the angle between the first and second directions can be non-right angle. In this case, in a reference plane parallel to the first and second directions, the projection of the positive electrode conductive bus 100 is approximately obtuse or acute.

[0045] The negative electrode conductive bus 200 includes a first negative electrode conductive segment 210 extending along a first direction and a second negative electrode conductive segment 220 extending along a second direction; it can be understood that in a reference plane parallel to the first and second directions, the projection of the first negative electrode conductive segment 210 is approximately parallel to the first positive electrode conductive segment 110, and the projection of the second negative electrode conductive segment 220 is approximately parallel to the projection of the second positive electrode conductive segment 120.

[0046] The projections of the positive electrode conductive bus 100 and the negative electrode conductive bus 200 in a reference plane are spaced apart, and this reference plane is parallel to the first direction and the second direction. A first connecting portion 121 is provided on the side of the second positive electrode conductive segment 120 facing the second negative electrode conductive segment 220. A second connecting portion 221 is provided on the side of the second negative electrode conductive segment 220 facing the second positive electrode conductive segment 120. The first connecting portion 121 and the second connecting portion 221 are alternately and spaced apart in the second direction. In this embodiment, the first connecting portion 121 is rectangular, and the second connecting portion 221 is rectangular. In some possible embodiments, the first connecting portion 121 may be semi-circular or other irregular in shape; the second connecting portion 221 may be semi-circular or other irregular in shape.

[0047] In this embodiment, the first positive conductive segment 110 and the second positive conductive segment 120 are connected by an intermediate connector, which is a fuse. Alternatively, in some possible embodiments, the first positive conductive segment 110 and the second positive conductive segment 120 can be directly connected, for example, they can be directly and detachably connected; or, in some possible embodiments, the positive conductive bus 100 can be an integral structure.

[0048] In this embodiment, the second positive conductive segment 120 and the first connecting portion 121 form an integral structure; or, in some possible embodiments, the first connecting portion 121 is detachably connected to the first positive conductive segment 110.

[0049] In this embodiment, the first negative electrode conductive segment 210 and the second negative electrode conductive segment 220 are detachably connected; or, in some possible embodiments, the negative electrode conductive bus 200 is an integral structure.

[0050] In this embodiment, the second negative electrode conductive segment 220 and the second connecting portion 221 form an integral structure; or, in some possible embodiments, the second connecting portion 221 is detachably connected to the second negative electrode conductive segment 220.

[0051] For example, the first positive electrode conductive segment 110 can be a copper busbar or an aluminum busbar; the second positive electrode conductive segment 120 can be a copper busbar or an aluminum busbar; the first negative electrode conductive segment 210 can be a copper busbar or an aluminum busbar; and the second negative electrode conductive segment 220 can be a copper busbar or an aluminum busbar.

[0052] In this embodiment, the first positive conductive segment 110, the second positive conductive segment 120, the first negative conductive segment 210, and the second negative conductive segment 220 are copper busbars.

[0053] In this embodiment, the application of a photovoltaic inverter busbar assembly to circuit board 10 is used as an example for illustration. In some possible embodiments, the photovoltaic inverter busbar assembly can also be applied to other situations of the photovoltaic inverter besides the circuit board, that is, in the scenario where the positive and negative output positions are formed in other locations of the photovoltaic inverter besides the circuit board.

[0054] In the photovoltaic inverter busbar assembly provided in this application embodiment, the positive electrode busbar 100 can be connected to the positive output position 301 through the first connection part 121, and the negative electrode busbar 200 can be connected to the negative output position 302 through the second connection part 221. The photovoltaic inverter busbar assembly can thus be used to establish an electrical connection between each positive output position 301 and the first positive electrode conductive segment 110, and to establish an electrical connection between each negative output position 302 and the first negative electrode conductive segment 210. In this way, the first positive electrode conductive segment 110 and the first negative electrode conductive segment 210 can be used to centrally connect to the outside, so as to solve the problem of difficulty in connecting the positive output position 301 and the negative output position 302 to the external interface in the related technology. Meanwhile, the layout features of the first connecting part 121 facing the second negative conductive segment 220, the second connecting part 221 facing the second positive conductive segment 120, and the first connecting part 121 and the second connecting part 221 being alternately and spaced apart in the second direction can avoid contact interference or too close contact between the positive conductive bus 100 and the negative conductive bus 200, thus avoiding short circuit problems.

[0055] Reference Figures 1 to 4 As shown, the positive electrode conductive bus 100 has a first bent portion 130, which is used to position the portions of the positive electrode conductive bus 100 located at both ends of the first bent portion 130 at different heights. The negative electrode conductive bus 200 has a second bent portion 230, which is used to position the portions of the negative electrode conductive bus 200 located at both ends of the second bent portion 230 at different heights.

[0056] Understandably, the first bend 130 allows the positive electrode busbar 100 to form a step at a corresponding position, facilitating the adjustment of the distance between the positive electrode busbar 100 and the mounting position (e.g., the circuit board body 300). The second bend 230 allows the negative electrode busbar 200 to form a step at a corresponding position, facilitating the adjustment of the distance between the negative electrode busbar 200 and the mounting position.

[0057] Reference Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, the photovoltaic inverter busbar assembly further includes an overcurrent protection device 700. The second positive conductive section 120 is electrically connected to the first positive conductive section 110 via the overcurrent protection device 700. The overcurrent protection device 700 is used to disconnect the second positive conductive section 120 and the first positive conductive section 110 when the current exceeds a safe value.

[0058] In this embodiment, the overcurrent protection device 700 can protect the circuit of the photovoltaic inverter busbar assembly, preventing damage to the circuit of the photovoltaic inverter busbar assembly due to abnormal current.

[0059] In this embodiment, the overcurrent protection device 700 is a fuse. In some possible embodiments, the overcurrent protection device 700 may 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.

[0060] Reference Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, the overcurrent protection device 700 is detachably connected to the second positive conductive section 120, and the overcurrent protection device 700 is detachably connected to the first positive conductive section 110. This facilitates replacement of the overcurrent protection device 700 if it is damaged.

[0061] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, the overcurrent protection device 700 includes an overcurrent protection device body 710 and a first ear plate 720 and a second ear plate 730 electrically connected to the overcurrent protection device body 710; the first ear plate 720 is in conductive contact with the first positive electrode conductive section 110, and the second ear plate 730 is in conductive contact with the second positive electrode conductive section 120.

[0062] In this embodiment, the design of "the first ear plate 720 making conductive contact with the first positive conductive segment 110 and the second ear plate 730 making conductive contact with the second positive conductive segment 120" can meet the design requirement of "the overcurrent protection device 700 and the first positive conductive segment 110 being detachably connected". On the other hand, it helps to increase the overcurrent area of ​​the overcurrent protection device 700 and the first positive conductive segment 110, so as to reduce the resistance at the connection.

[0063] For example, in this embodiment, the first ear plate 720 and the first positive conductive segment 110 are pressed together by a bolt passing through the first ear plate 720 and the first positive conductive segment 110, so that the first ear plate 720 and the first positive conductive segment 110 are in close contact. The bolt is threadedly connected to the application position of the photovoltaic inverter busbar assembly. Alternatively, in some possible embodiments, one of the first ear plate 720 and the first positive conductive segment 110 is used to pass through the bolt, and the other has a threaded hole that mates with the bolt. The bolt and the threaded hole mate to press the one passing through the bolt onto the one with the threaded hole.

[0064] Reference Figure 1 and Figure 4 As shown, in some possible embodiments, the conductive sheet assembly may further include a current sensor 910 for detecting the current flowing through the positive electrode busbar 100. In this embodiment, the current of the busbar assembly for the photovoltaic inverter can be detected by the current sensor 910.

[0065] For example, the current sensor 910 may take the form of a tunnel magnetoresistive sensor, a Hall sensor, or a giant magnetoresistive sensor.

[0066] For example, when using a busbar assembly for a photovoltaic inverter, a current sensor 910 can be connected to a monitoring module to monitor the current state of the application circuit of the busbar assembly for the photovoltaic inverter.

[0067] Reference Figure 1 and Figure 4 As shown, in some embodiments, the current sensor 910 is mounted on the overcurrent protection device 700. This helps to improve the compactness of the circuit board 10 structure.

[0068] Reference Figure 1 , Figure 4 , Figure 6 , Figure 7 and Figure 8 As shown, in some embodiments, the busbar assembly for the photovoltaic inverter further includes a magnetic ring 920. The magnetic ring 920 is sleeved on the first positive conductive section 110 and the first negative conductive section 210.

[0069] In this embodiment, electromagnetic interference (EMI) is suppressed by a magnetic ring 920.

[0070] For example, the magnetic ring 920 includes a magnetic ring body 921 and a magnetic ring frame 922. The magnetic ring frame 922 has a receiving cavity 9221, in which the magnetic ring body 921 is disposed. The magnetic ring frame 922 has a channel for passing through the first positive conductive segment 110 and the first negative conductive segment 210, and the magnetic ring body 921 is disposed around the channel. The magnetic ring frame 922 is fitted onto the first positive conductive segment 110 and the first negative conductive segment 210 through the channel. The magnetic ring frame 922 is an insulator (e.g., plastic). The magnetic ring frame 922 is detachably connected to the first positive conductive segment 110 by a fastener, and the magnetic ring frame 922 is detachably connected to the first negative conductive segment 210 by another fastener; it should be noted that the two fasteners are spaced apart to avoid short circuit problems.

[0071] Reference Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the circuit board 10 provided in this embodiment includes a circuit board body 300, a terminal block assembly 400, and the aforementioned photovoltaic inverter busbar assembly.

[0072] The circuit board body 300 includes a positive output position 301 and a negative output position 302. The positive output position 301 and the negative output position 302 are formed on copper foil.

[0073] For example, positive output bit 301 is used to electrically connect to the positive terminal of a DC line (which may come from a battery used in a photovoltaic system); it is understood that negative output bit 302 is used to electrically connect to the negative terminal of the corresponding line.

[0074] The terminal block assembly 400 includes a positive output terminal 410, a positive input terminal 420, a negative output terminal 430, and a negative input terminal 440. The positive output terminal 410 is used for electrical connection to an external interface; the positive input terminal 420 is electrically connected to the positive output terminal 410; the negative output terminal 430 is used for electrical connection to an external interface; and the negative input terminal 440 is electrically connected to the negative output terminal 430.

[0075] For example, the positive output terminal 410 and the negative output terminal 430 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 410 or the negative output terminal 430.

[0076] The positive electrode busbar 100 is electrically connected to the corresponding positive output position 301 via the first connecting portion 121. Exemplarily, in this embodiment, the corresponding position of the positive electrode busbar 100 and the positive output position 301 are connected via an intermediate connecting member, the first conductive post 510, to support at least a portion of the positive electrode busbar 100 a certain distance away from the circuit board body 300 in a direction parallel to the Z-axis. This facilitates heat dissipation from the positive electrode busbar 100 and creates a gap between the corresponding portion of the positive electrode busbar 100 and the circuit board body 300, preventing potential short circuits. In some possible embodiments, the corresponding position of the positive electrode busbar 100 can be directly connected to the positive output position 301, for example, by direct soldering, or by direct conductive contact and fastening with appropriate fasteners.

[0077] The positive electrode bus 100 is electrically connected to the positive input terminal 420 via a first positive electrode conductive segment 110. Exemplarily, in this embodiment, the positive electrode bus 100 is detachably connected to the positive input terminal 420 via fasteners disposed on the positive input terminal 420. In some possible embodiments, the positive electrode bus 100 can be connected to the positive input terminal 420 by welding; alternatively, the positive input terminal 420 may have a conductive clamp for holding the positive electrode bus 100, and the positive electrode bus 100 is detachably connected to the positive input terminal 420 via a corresponding conductive clamp.

[0078] The negative electrode busbar 200 is electrically connected to the corresponding negative electrode output position 302 via the second connecting portion 221. Exemplarily, in this embodiment, the corresponding position of the negative electrode busbar 200 and the negative electrode output position 302 are connected via an intermediate connecting member, the second conductive post 520, to support at least a portion of the negative electrode busbar 200 away from the circuit board body 300 by a certain distance. This facilitates heat dissipation from the negative electrode busbar 200 and creates a gap between the corresponding portion of the negative electrode busbar 200 and the circuit board body 300, preventing potential short circuits. In some possible embodiments, the corresponding position of the negative electrode busbar 200 can be directly connected to the negative electrode output position 302, for example, by direct soldering, or by direct conductive contact and fastening with appropriate fasteners.

[0079] The negative electrode conductive bus 200 is electrically connected to the negative electrode input terminal 440 via a first negative electrode conductive segment 210. Exemplarily, in this embodiment, the negative electrode conductive bus 200 is detachably connected to the negative electrode input terminal 440 via fasteners disposed on the negative electrode input terminal 440. In some possible embodiments, the negative electrode conductive bus 200 can be connected to the negative electrode input terminal 440 by welding; alternatively, the negative electrode input terminal 440 is provided with conductive clamps for holding the negative electrode conductive bus 200, and the negative electrode conductive bus 200 is detachably connected to the negative electrode input terminal 440 via corresponding conductive clamps.

[0080] For example, there are multiple positive output positions 301. In this embodiment, there are three positive output positions 301. In some possible embodiments, the number of positive output positions 301 can be two, four, five or more. Of course, this application does not limit this, and the specific setting can be flexibly selected according to the needs.

[0081] Understandably, the number of negative output bits 302 corresponds to the number of positive output bits 301.

[0082] It should be noted that in some possible embodiments, if there is an insulation requirement on part of the surface of the positive electrode 100 or the negative electrode 200 (for example, some points need to avoid conductive contact with the circuit board body 300), the surface of the corresponding position of the positive electrode 100 or the negative electrode 200 may have an insulating plating layer or an insulating covering layer.

[0083] The circuit board 10 provided in this embodiment of the application sets up the aforementioned photovoltaic inverter conductive bus assembly by setting up a terminal block assembly 400 including a positive output terminal 410, a positive input terminal 420, a negative output terminal 430, and a negative input terminal 440; and electrically connects the positive conductive bus 100 to the positive output terminal 301 and the positive input terminal 420 respectively, and electrically connects the negative conductive bus 200 to the negative output terminal 302 and the negative input terminal 440 respectively; so as to facilitate the external interface to be electrically connected to the positive output terminal 301 through the positive output terminal 410 and to the negative output terminal 302 through the negative output terminal 430, thereby solving the problem of difficulty in connecting the positive output terminal 301 and the negative output terminal 302 to the external interface. Furthermore, by utilizing the advantages of high current carrying capacity, low impedance, rigid structure, and easy installation of the positive electrode busbar 100 and the negative electrode busbar 200, it helps to improve the safety, service life, and structural compactness of the circuit board 10. It also helps to reduce the resistive heating of the circuit board 10 to reduce the energy consumption of the circuit board 10, and also helps to reduce the processing difficulty of the circuit board 10.

[0084] Reference Figure 1 , Figure 4 , Figure 9 and Figure 10 As shown, in some embodiments, the circuit board 10 further includes a first conductive post 510 and a second conductive post 520. The first connection portion 121 and the positive output position 301 are electrically connected through the first conductive post 510; the second connection portion 221 and the negative output position 302 are electrically connected through the second conductive post 520.

[0085] In this embodiment, the first connecting portion 121 is raised by the first conductive post 510 to raise the second positive conductive segment 120; the second connecting portion 221 is raised by the second conductive post 520 to raise the second negative conductive segment 220. Thus, a gap is formed between the second positive conductive segment 120 and the circuit board body 300, and a gap is formed between the second negative conductive segment 220 and the circuit board body 300.

[0086] The aforementioned spacing facilitates heat dissipation for the corresponding areas of the circuit board body 300, the second positive conductive segment 120, or the second negative conductive segment 220. Furthermore, it prevents the second positive conductive segment 120 and the second negative conductive segment 220 from being in close contact with the circuit board body 300. This not only facilitates the installation of the second positive conductive segment 120 and the second negative conductive segment 220 but also avoids potential short circuits caused by the second positive conductive segment 120 and the second negative conductive segment 220 to the circuit board body 300. (Understandably, if there are lines passing under the second positive conductive segment 120 and the second negative conductive segment 220 on the circuit board body 300, the raised second positive conductive segment 120 and the second negative conductive segment 220 will not contact the corresponding lines.)

[0087] Reference Figure 1 , Figure 4 , Figure 9 and Figure 10 As shown, in some embodiments, the first conductive post 510 is detachably connected to the first connecting portion 121, and the first conductive post 510 is welded to the positive output position 301. The second conductive post 520 is detachably connected to the second connecting portion 221, and the second conductive post 520 is welded to the negative output position 302.

[0088] In this embodiment, the first connecting part 121 and the second connecting part 221 are detachable to facilitate the disassembly of the second positive conductive segment 120 and the second negative conductive segment 220. This facilitates both the production of the circuit board 10 and the replacement of the second positive conductive segment 120 and the second negative conductive segment 220.

[0089] For example, in the production of the circuit board 10 in this embodiment, the first conductive post 510 and the second conductive post 520 can be soldered to the corresponding positions of the circuit board body 300; then, the first connecting part 121 is detachably connected to the corresponding first conductive post 510, and the second connecting part 221 is detachably connected to the corresponding second conductive post 520.

[0090] For example, the first conductive post 510 and the second conductive post 520 are cylindrical in shape.

[0091] Understandably, the first conductive post 510 and the second conductive post 520 are formed in a conductive material, such as copper.

[0092] Reference Figure 1 , Figure 4 , Figure 9 and Figure 10 As shown, in some embodiments, the circuit board 10 further includes a first fastener 610 and a second fastener 620. The first conductive post 510 has a first threaded hole 511, and the first connecting portion 121 has a first through hole 1211. The first fastener 610 is used to pass through the first through hole 1211, and the first fastener 610 is threadedly connected to the first threaded hole 511. The first conductive post 510 and the first connecting portion 121 are detachably connected by the first fastener 610.

[0093] The second conductive post 520 has a second threaded hole 521, and the second connecting portion 221 has a second through hole 2211. A second fastener 620 is used to pass through the second through hole 2211, and the second fastener 620 is threadedly connected to the second threaded hole 521. The second conductive post 520 and the second connecting portion 221 are detachably connected by the second fastener 620.

[0094] In this embodiment, the first fastener 610 secures the first connecting portion 121 and the first conductive post 510, pressing the side of the first connecting portion 121 facing the first conductive post 510 against the first conductive post 510 to ensure a large contact area between them, thus providing good electrical conductivity. Furthermore, the connection between the first connecting portion 121 and the first conductive post 510 can be released by removing the first fastener 610.

[0095] Understandably, the second fastener 620 secures the second connecting portion 221 and the second conductive post 520, pressing the side of the second connecting portion 221 facing the second conductive post 520 against the second conductive post 520 to ensure a large contact area between them, thus providing good electrical conductivity. Furthermore, removing the second fastener 620 disengages the connection between the second connecting portion 221 and the second conductive post 520.

[0096] Reference Figure 1 , Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, in some embodiments, the terminal assembly 400 further includes a terminal block 450. A positive output terminal 410, a positive input terminal 420, a negative output terminal 430, and a negative input terminal 440 are disposed on the terminal block 450. In this embodiment, the positive output terminal 410, positive input terminal 420, negative output terminal 430, and negative input terminal 440 can be relatively centrally arranged via the terminal block 450.

[0097] The positive input terminal 420 and the negative input terminal 440 are located on the side of the terminal block 450 near the positive conductive bus 100 and the negative conductive bus 200, respectively. This facilitates the connection of the positive input terminal 420 to the positive conductive bus 100 and the negative input terminal 440 to the negative conductive bus 200.

[0098] The positive output terminal 410 and the negative output terminal 430 are located on the side of the terminal block 450 away from the positive conductive bus 100 and the negative conductive bus 200. This facilitates the connection of the positive output terminal 410 and the negative output terminal 430 to an external interface.

[0099] For example, the terminal block 450 is made of insulating material and includes a partition 451. The positive output terminal 410 and the positive input terminal 420 are located on one side of the partition 451; the negative output terminal 430 and the negative input terminal 440 are located on the other side of the partition 451. Thus, positive and negative isolation is formed by the partition 451 to prevent short circuits in the terminal assembly 400.

[0100] For example, the terminal block 450 is provided with a first conductive plate and a second conductive plate. The first conductive plate is disposed between the positive output terminal 410 and the positive input terminal 420, and is used to electrically connect the positive output terminal 410 and the positive input terminal 420. The second conductive plate is disposed between the negative output terminal 430 and the negative input terminal 440, and is used to electrically connect the negative output terminal 430 and the negative input terminal 440.

[0101] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, the photovoltaic inverter busbar assembly in the circuit board 10 includes an overcurrent protection device 700. The second positive conductive segment 120 and the first positive conductive segment 110 are electrically connected through the overcurrent protection device 700. The overcurrent protection device 700 is used to disconnect the electrical connection between the second positive conductive segment 120 and the first positive conductive segment 110 when the current exceeds a safe value. The overcurrent protection device 700 is detachably connected to the second positive conductive segment 120 and the first positive conductive segment 110. The overcurrent protection device 700 includes an overcurrent protection device body 710 and a first ear plate 720 and a second ear plate 730 electrically connected to the overcurrent protection device body 710. When the first ear plate 720 is in conductive contact with the first positive conductive segment 110 and the second ear plate 730 is in conductive contact with the second positive conductive segment 120, the circuit board 10 may also include a first support member 810, a second support member 820, and a third fastener 630.

[0102] The first support member 810 is disposed on the circuit board body 300. The first support member 810 has a first support surface 811. The first support surface 811 is used to support one end of the first positive conductive segment 110 used to connect the overcurrent protection device 700. The first ear plate 720 is in conductive contact with the side of the first positive conductive segment 110 opposite to the first support surface 811.

[0103] The second support member 820 is disposed on the circuit board body 300. The second support member 820 has a second support surface 821. The second support surface 821 is used to support one end of the second positive conductive segment 120 used to connect the overcurrent protection device 700. The second ear plate 730 is in conductive contact with the side of the second positive conductive segment 120 opposite to the second support surface 821.

[0104] For example, the portion of the second positive conductive segment 120 facing the second support member 820 has the first bend 130 described above, for being supported by the second support member 820.

[0105] The third fastener 630 is connected to the first support member 810. For example, the first support member 810 has an internal thread for threaded connection of the third fastener 630, and the third fastener 630 and the first support member 810 are connected by a thread. The third fastener 630 is used to fasten the first ear plate 720 and the first positive conductive segment 110 onto the first support surface 811. Thus, on the one hand, the first support member 810 can lift and support the first ear plate 720 and the first positive conductive segment 110, raising them to avoid direct contact between the first positive conductive segment 110 and the first ear plate 720 and the surface of the circuit board body 300, thus preventing a short circuit on the surface of the circuit board body 300; on the other hand, the first ear plate 720 and the first positive conductive segment 110 can be detachably connected to the first support member 810, making it convenient to replace the first positive conductive segment 110 or the overcurrent protection device 700; and the first ear plate 720 and the first positive conductive segment 110 can be pressed together by the fastening action of the third fastener 630 to form a conductive contact and ensure the contact area, thereby reducing resistance.

[0106] The fourth fastener 640 is connected to the second support member 820. For example, the second support member 820 has internal threads for threaded connection of the fourth fastener 640, and the second support member 820 and the fourth fastener 640 are connected by threads. The fourth fastener 640 is used to fasten the second ear plate 730 and the second positive electrode conductive segment 120 onto the second support surface 821. Thus, on the one hand, the second support member 820 can lift and support the second ear plate 730 and the second positive conductive segment 120, raising them to avoid direct contact between the second ear plate 730 and the second positive conductive segment 120 and the surface of the circuit board body 300, thereby preventing a short circuit to the surface of the circuit board body 300; on the other hand, the second ear plate 730 and the second positive conductive segment 120 are detachably connected to the second support member 820, making it convenient to replace the second positive conductive segment 120 or the overcurrent protection device 700; and the second ear plate 730 and the second positive conductive segment 120 can be pressed together by the fourth fastener 640 to form a conductive contact and ensure the contact area, thereby reducing resistance.

[0107] Reference Figure 1 , Figure 2 and Figure 8 As shown, in some embodiments, the circuit board 10 includes a third support member 830. The corresponding ends of the first negative conductive segment 210 and the second negative conductive segment 220 are detachably connected to the third support member 830 via a fifth fastener 650. Each of the first negative conductive segment 210 and the second negative conductive segment 220 has a through hole for passing through the fifth fastener 650. The third support member 830 includes an internal thread for threaded connection of the fifth fastener 650 to the third support member 830. The fifth fastener 650 presses the second negative conductive segment 220 and the first negative conductive segment 210 together. This facilitates the elevation of the second negative conductive segment 220 and the first negative conductive segment 210.

[0108] For example, the portion of the first negative conductive segment 210 facing the third support member 830 and the portion of the second negative conductive segment 220 facing the third support member 830 have the aforementioned second bend 230 to accommodate the support of the third support member 830.

[0109] Reference Figure 1 , Figure 4 and Figure 11 As shown, the photovoltaic inverter provided in this application embodiment includes the circuit board 10 described above.

[0110] The photovoltaic inverter, by setting the aforementioned circuit board 10, facilitates external wiring and helps improve the safety and service life of the photovoltaic inverter itself.

[0111] 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.

[0112] The circuit board 10 also includes a rectifier assembly and an inverter assembly, which are mounted on the circuit board body 300. The rectifier assembly is configured to rectify multiple AC currents (e.g., AC current generated by photovoltaic power generation and then inverted) into DC currents, and output each DC current through the corresponding positive output terminal 301 and negative output terminal 302 of the circuit board 10. The positive output terminal 410 and negative output terminal 430 of the terminal assembly 400 are connected to the battery, and the photovoltaic inverter uses this to supply DC current to charge the battery. The inverter assembly is configured to invert the DC current from the battery into AC current to power electrical appliances.

[0113] 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.

[0114] 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: The positive electrode conductive bus (100) includes a first positive electrode conductive segment (110) extending along a first direction and a second positive electrode conductive segment (120) extending along a second direction, wherein the first direction intersects the second direction; The negative electrode conductive bus (200) includes a first negative electrode conductive segment (210) extending along the first direction and a second negative electrode conductive segment (220) extending along the second direction. The projections of the positive electrode busbar (100) and the negative electrode busbar (200) in the reference plane are spaced apart from each other, and the reference plane is parallel to the first direction and the second direction; The second positive electrode conductive segment (120) has a first connecting portion (121) on the side facing the second negative electrode conductive segment (220), and the second negative electrode conductive segment (220) has a second connecting portion (221) on the side facing the second positive electrode conductive segment (120). The first connecting portion (121) and the second connecting portion (221) are alternately and spaced apart in the second direction.

2. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, The positive electrode conductive bus (100) has a first bending portion (130), which is used to place the portions of the positive electrode conductive bus (100) located at both ends of the first bending portion (130) at different heights; And / or, the negative electrode conductive bus (200) has a second bend (230) for placing portions of the negative electrode conductive bus (200) located at both ends of the second bend (230) at different heights.

3. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, It also includes an overcurrent protection device (700), and the second positive electrode conductive segment (120) and the first positive electrode conductive segment (110) are electrically connected through the overcurrent protection device (700); The overcurrent protection device (700) is used to disconnect the electrical connection between the second positive conductive section (120) and the first positive conductive section (110) when the current is greater than the safe value.

4. The busbar assembly for a photovoltaic inverter according to claim 3, characterized in that, The overcurrent protection device (700) is detachably connected to the second positive electrode conductive section (120), and the overcurrent protection device (700) is detachably connected to the first positive electrode conductive section (110).

5. The busbar assembly for a photovoltaic inverter according to claim 4, characterized in that, The overcurrent protection device (700) includes an overcurrent protection device body (710) and a first ear plate (720) and a second ear plate (730) electrically connected to the overcurrent protection device body (710); the first ear plate (720) is in conductive contact with the first positive electrode conductive segment (110), and the second ear plate (730) is in conductive contact with the second positive electrode conductive segment (120).

6. The busbar assembly for a photovoltaic inverter according to claim 3, characterized in that, It also includes a current sensor (910) for detecting the current flowing through the positive electrode busbar (100); The current sensor (910) is mounted on the overcurrent protection device (700).

7. The busbar assembly for a photovoltaic inverter according to claim 1, characterized in that, It also includes a magnetic ring (920), which is sleeved on the first positive electrode conductive segment (110) and the first negative electrode conductive segment (210).

8. A circuit board, characterized in that, include: The circuit board body (300) includes a positive output position (301) and a negative output position (302). Terminal block assembly (400) includes: The positive output terminal (410) is used for electrical connection to an external interface; Positive input terminal (420) electrically connected to the positive output terminal (410); The negative output terminal (430) is used for electrical connection to an external interface; The negative input terminal (440) is electrically connected to the negative output terminal (430). The photovoltaic inverter busbar assembly according to any one of claims 1-7, wherein the positive electrode busbar (100) is electrically connected to the corresponding positive electrode output position (301) through the first connecting part (121); the negative electrode busbar (200) is electrically connected to the corresponding negative electrode output position (302) through the second connecting part (221); the positive electrode busbar (100) is electrically connected to the positive electrode input terminal (420) through the first positive electrode conductive segment (110); and the negative electrode busbar (200) is electrically connected to the negative electrode input terminal (440) through the first negative electrode conductive segment (210).

9. The circuit board according to claim 8, characterized in that, It also includes a first conductive post (510) and a second conductive post (520); the first connecting part (121) and the positive output position (301) are electrically connected through the first conductive post (510); the second connecting part (221) and the negative output position (302) are electrically connected through the second conductive post (520).

10. The circuit board according to claim 9, characterized in that, The first conductive post (510) is detachably connected to the first connecting part (121), and the first conductive post (510) is welded to the positive output position (301); The second conductive post (520) is detachably connected to the second connecting part (221), and the second conductive post (520) is welded to the negative output position (302).

11. The circuit board according to claim 10, characterized in that, It also includes a first fastener (610) and a second fastener (620); The first conductive post (510) has a first threaded hole (511), the first connecting part (121) has a first through hole (1211), the first fastener (610) is used to pass through the first through hole (1211) and be threadedly connected to the first threaded hole (511), and the first conductive post (510) and the first connecting part (121) are detachably connected by the first fastener (610). The second conductive post (520) has a second threaded hole (521), the second connecting part (221) has a second through hole (2211), the second fastener (620) is used to pass through the second through hole (2211) and be threadedly connected to the second threaded hole (521), and the second conductive post (520) and the second connecting part (221) are detachably connected by the second fastener (620).

12. The circuit board according to claim 8, characterized in that, The terminal assembly (400) further includes a terminal block (450), wherein the positive output terminal (410), the positive input terminal (420), the negative output terminal (430), and the negative input terminal (440) are disposed on the terminal block (450), the positive input terminal (420) and the negative input terminal (440) are disposed on the side of the terminal block (450) close to the positive conductive bus (100) and the negative conductive bus (200), and the positive output terminal (410) and the negative output terminal (430) are disposed on the side of the terminal block (450) away from the positive conductive bus (100) and the negative conductive bus (200).

13. The circuit board according to claim 8, characterized in that, The photovoltaic inverter busbar assembly includes an overcurrent protection device (700), and the second positive conductive segment (120) and the first positive conductive segment (110) are electrically connected through the overcurrent protection device (700). The overcurrent protection device (700) is used to disconnect the electrical connection between the second positive conductive segment (120) and the first positive conductive segment (110) when the current is greater than the safe value. The overcurrent protection device (700) is detachably connected to the second positive conductive segment (120) and the first positive conductive segment (110). The overcurrent protection device (700) includes an overcurrent protection device body (710) and a first ear plate (720) and a second ear plate (730) electrically connected to the overcurrent protection device body (710). The first ear plate (720) is in conductive contact with the first positive conductive segment (110), and the second ear plate (730) is in conductive contact with the second positive conductive segment (120). The circuit board also includes: A first support member (810) is disposed on the main body (300) of the circuit board. The first support member (810) has a first support surface (811). The first support surface (811) is used to support one end of the first positive conductive segment (110) used to connect to the overcurrent protection device (700). The first ear plate (720) is in conductive contact with the side of the first positive conductive segment (110) opposite to the first support surface (811). The second support member (820) is disposed on the main body (300) of the circuit board. The second support member (820) has a second support surface (821). The second support surface (821) is used to support one end of the second positive conductive segment (120) for connecting the overcurrent protection device (700). The second ear plate (730) is in conductive contact with the side of the second positive conductive segment (120) opposite to the second support surface (821). A third fastener (630) connected to the first support member (810) is used to fasten the first ear plate (720) and the first positive electrode conductive segment (110) to the first support surface (811); A fourth fastener (640) is connected to the second support member (820) for securing the second ear plate (730) and the second positive conductive segment (120) to the second support surface (821).

14. A photovoltaic inverter, characterized in that, include: The photovoltaic inverter busbar assembly according to any one of claims 1 to 7, or the circuit board according to any one of claims 8 to 13.

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