Photovoltaic inverter

Abstract

The utility model discloses a photovoltaic inverter, which comprises a box body and a photovoltaic connector array, the box body is provided with a first box body wall perpendicular to the first direction. The photovoltaic connector array is arranged on the first box body wall and comprises a plurality of photovoltaic connector groups which are respectively arranged along a second direction and a third direction; each photovoltaic connector group comprises a male photovoltaic connector and a female photovoltaic connector which are adjacent in the second direction and opposite in polarity, the polarities of the two optical connectors which are adjacent in the second direction and belong to different photovoltaic connector groups are the same, and the polarities of the photovoltaic connectors arranged in the third direction are the same. According to the photovoltaic inverter, through the array mode of the photovoltaic connectors, positive and negative lap joint of internal connecting cables is not prone to occurring, and the risk of the direct current arc discharge phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of inverters, in particular to a photovoltaic inverter. Background Art

[0002] Solar photovoltaic power generation is a renewable energy power generation technology with sustainable development. It is predicted that solar photovoltaic power generation will occupy an important position in the world's energy consumption in the 21st century. It will not only replace some conventional energy sources, but also become the main body of the world's energy supply.

[0003] The photovoltaic inverter is one of the important devices in the photovoltaic power generation system. Among them, the photovoltaic inverter is connected to multiple photovoltaic modules through a photovoltaic connector, and then the electric energy of the multiple photovoltaic modules is introduced onto a circuit board with conversion function through an internal lead structure. However, the applicant found that the cables in the lead structure are prone to lap with each other and cause short circuits during the operation of the machine, and it is easy to occur DC arcing phenomenon when the voltage level of the photovoltaic inverter is relatively high, and in severe cases, it may damage the photovoltaic inverter. Therefore, how to reduce the short-circuit probability of the cables has become one of the research topics in the industry. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a photovoltaic inverter, which can reduce the short-circuit probability of the cables and avoid the damage of the DC arcing phenomenon to the inverter.

[0005] The utility model provides a photovoltaic inverter, including: a box body having a first box wall perpendicular to the first direction; and a photovoltaic connector array arranged on the first box wall, the photovoltaic connector array including a plurality of photovoltaic connector groups arranged along the second direction and the third direction respectively; wherein each photovoltaic connector group includes a male photovoltaic connector and a female photovoltaic connector adjacent along the second direction and with opposite polarities, the polarities of two photovoltaic connectors adjacent along the second direction and belonging to different photovoltaic connector groups are the same, and the polarities of the photovoltaic connectors arranged along the third direction are the same; the first direction, the second direction and the third direction are perpendicular to each other.

[0006] Based on the fact that the polar order of adjacent photovoltaic connector groups in the photovoltaic connector array is different along the second direction, the polarities of two photovoltaic connectors adjacent along the second direction and belonging to different photovoltaic connector groups are the same. Therefore, it is suitable to make the spacing between the cables connected to the photovoltaic connectors with the same polarity and connected to each other shorter on this basis, and conversely increase the spacing and creepage distance between the cables with different polarities and adjacent to each other, reducing the probability of cable lap short circuit and DC arcing phenomenon, which is especially applicable when the size of the box body in the second direction is limited.

[0007] In some embodiments, a receiving space is formed inside the box body, and a photovoltaic connection plate is further included and disposed in the receiving space; each of the photovoltaic connectors penetrates through the first box body wall, one end of which is used for connecting with an external photovoltaic module, and the other end extends into the receiving space and is welded to one side of the photovoltaic connection plate; a first port group array corresponding to the photovoltaic connector array is further formed on the other side of the photovoltaic connection plate; wherein, the first port group array includes a plurality of first port groups arranged along a second direction and a third direction respectively; wherein, each of the first port groups includes two first ports adjacent to each other along the second direction and having opposite polarities, the polarities of two first ports adjacent to each other along the second direction and belonging to different first port groups are the same, and the polarities of the first ports arranged along the third direction are the same.

[0008] The electric energy accessed through the photovoltaic connectors is standardized and introduced into the photovoltaic inverter box body through the photovoltaic connection plate, and a first port group array corresponding to the photovoltaic connector array in terms of polarity can be formed, which is further suitable for making the distance between the cables connecting the photovoltaic connectors with the same polarity and adjacent to each other shorter, and conversely increasing the distance between the cables with different polarities and adjacent to each other and the creepage distance, thereby reducing the probability of cable lap short circuit and DC arc discharge phenomenon.

[0009] In some embodiments, the photovoltaic connector includes a lead structure, which includes the first port group array; the lead structure further includes: a change-over switch device, located in the receiving space and having a handle extending out of the box body for on-off control, the change-over switch device is located on one side of the first port group array along the third direction, and a plurality of second port groups spaced apart from each other are formed along the second direction, and the polarities of the second ports in each of the second port groups are the same as the polarities of the first ports corresponding to the second port group along the third direction in the first port group array; and multiple groups of first cable groups, located in the receiving space, each of the first cable groups includes a plurality of first cables extending along the third direction, and the first cables are used for connecting the first ports and the second ports corresponding to each other along the third direction; wherein, along the second direction, the distance between adjacent first cable groups with the same polarity is less than the distance between adjacent first cable groups with opposite polarities.

[0010] The change-over switch device plays a role of intermediate connection and on-off control. Through the above solution, the electrical connection between the first port group and the second port group can be realized, and further the electrical connection between the first port group array and the change-over switch device can be realized. Since the distance between adjacent first cable groups with the same polarity is configured to be less than the distance between adjacent first cable groups with opposite polarities, the creepage distance between the first cable groups with opposite polarities is larger, thereby reducing the short-circuit probability between the first cable groups with different polarities, and further reducing the short-circuit probability of the lead structure.

[0011] In some embodiments, the first port group array includes a first port row, a second port row, a third port row, and a fourth port row arranged in sequence from the first side to the second side along the second direction; the second port group is located on a surface of the switching device perpendicular to the third direction and close to the first port group array, and the second ports of the second port group form a first input port group, a second input port group, a third input port group, and a fourth input port group arranged in sequence from the first side to the second side along the second direction; the first cable group includes a first connection cable group, a second connection cable group, a third connection cable group, and a fourth connection cable group that extend along the third direction and are arranged at intervals along the second direction. The first connection cable group connects the first port of the first port row and the second ports of the first input port group, the second connection cable group connects the first port of the second port row and the second ports of the second input port group, the third connection cable group connects the first port of the third port row and the second ports of the third input port group, and the fourth connection cable group connects the first port of the fourth port row and the second ports of the fourth input port group.

[0012] This can electrically connect the first port and the second port, thereby electrically connecting the first port group array and the switching device. Moreover, since the second port group is located on a surface of the switching device perpendicular to the third direction and close to the first port group array, the first cable group can extend along the second direction to achieve the electrical connection between the first port and the switching device, shortening the extension path of the first cable group, which is beneficial to saving materials, reducing costs, and also beneficial to the neatness of the wiring layout.

[0013] In some embodiments, the lead structure further includes a first wire fixing device provided with a plurality of fixing holes spaced from each other along the second direction. Each of the fixing holes is used to fix the first connection cable group, the first bundle, and the fourth connection cable group respectively through a first wire bundling member, so that the first connection cable group, the first bundle, and the fourth connection cable group are spaced along the second direction. Among them, the first bundle is formed by bundling the second connection cable group and the third connection cable group with a first tying member.

[0014] Since the second connection cable group and the third connection cable group are bundled into a first bundle by the first cable tie, the creepage distance between the first cable groups of different polarities can be further increased, thereby further reducing the short - circuit probability between the first cable groups of different polarities, and further reducing the short - circuit probability of the lead structure. In addition, since, along the second direction, the first connection cable group, the first bundle, and the fourth connection cable group are fixedly spaced apart from the first cable fixing device, the distance of the first connection cable group, the first bundle, and the fourth connection cable group along the second direction can be fixed and is not easily affected by external vibrations, thereby reducing the short - circuit probability between the first connection cable group, the first bundle, and the fourth connection cable group, and further reducing the short - circuit probability of the lead structure.

[0015] In some embodiments, on the other side of the switching device perpendicular to the third direction, a third port group is formed. Each third port in the third port group has the same polarity as the corresponding second port in the second port group along the third direction. The third port group includes a first output port group, a second output port group, a third output port group, and a fourth output port group that are arranged in sequence from the first side to the second side and are spaced apart from each other along the second direction; the photovoltaic inverter further includes a power conversion board for realizing an inversion function; the lead structure further includes a second cable group perpendicular to the second direction; the photovoltaic connector array is electrically connected to the power conversion board through the lead structure; the power conversion board is located in the accommodation space, and the power conversion board has a fourth port group. The fourth port group includes a first access port group with the same polarity as the first output port group, a second access port group with the same polarity as the second output port group, a third access port group with the same polarity as the third output port group, and a fourth access port group with the same polarity as the fourth output port group; the second cable group is located in the accommodation space, and the second cable group includes a fifth connection cable group connecting the first output port group and the first access port group, a sixth connection cable group connecting the second output port group and the second access port group, a seventh connection cable group connecting the third output port group and the third access port group, and an eighth connection cable group connecting the fourth output port group and the fourth access port group.

[0016] Thereby, the electrical connection between the third port group and the fourth port group can be realized, and further the electrical connection between the switching device and the power conversion board can be realized.

[0017] In some embodiments, the photovoltaic inverter further includes a functional board located in the accommodation space. The functional board is perpendicular to the second direction and arranged at an interval from the power conversion board along the second direction. The functional board and the power conversion board are on the same side of the conversion switch device along the first direction, and the functional board and the power conversion board are on the same side of the conversion switch device along the third direction. Along the second direction, the second cable group is located between the power conversion board and the functional board. The fifth connection cable group and the eighth connection cable group are bundled into a second bundle by a second tying member, and the sixth connection cable group and the seventh connection cable group are bundled into a third bundle by a third tying member. Along the second direction, the second bundle and the third bundle are arranged at an interval from each other.

[0018] Since the fifth connection cable group and the eighth connection cable group are bundled into a second bundle by a second tying member, and the sixth connection cable group and the seventh connection cable group are bundled into a third bundle by a third tying member, and along the second direction, the second bundle and the third bundle are arranged at an interval from each other. Therefore, when the lead space is restricted by the power conversion board and the functional board, in the space formed between the power conversion board and the functional board, the distance between the second cable groups of different polarities along the second direction can be increased, thereby reducing the short-circuit probability between the second cable groups of different polarities, and further reducing the short-circuit probability of the lead structure.

[0019] In some embodiments, the lead structure further includes a second fixing device. Along the second direction, the second bundle and the third bundle are respectively fixed to the second fixing device at an interval by a second cable bundling member.

[0020] This fixes the distance between the second bundle and the third bundle along the second direction. Therefore, the distance between the second bundle and the third bundle along the second direction is not easily affected by external vibrations, thereby reducing the short-circuit probability between the second bundle and the third bundle, and further reducing the short-circuit probability of the lead structure.

[0021] In some embodiments, the conversion switch device is located near one end of the power conversion board along the third direction and near one end of the power conversion board along the first direction close to the first box body wall. The fourth port group is arranged on the power conversion board. The fourth port group is located on a side of the conversion switch device facing away from the first box body wall and close to the first end of the power conversion board along the third direction close to the conversion switch device. Along the third direction, the first access port group and the fourth access port group are located between the second access port group and the first end, and the first access port group and the fourth access port group are also located between the third access port group and the first end. Along the second direction, the second bundle is closer to the power conversion board than the third bundle.

[0022] Since the conversion switch device is located between one end of the power conversion board and the first box body wall, it is beneficial for the first cable group to extend near the position of the first box body wall, which is conducive to arranging other structural components such as power devices in the box, thereby improving the space utilization rate in the box. Moreover, since the conversion switch device and the fourth port group are located near the first end of the power conversion board along the third direction, it is beneficial for the second cable group to connect the conversion switch device and the fourth port group along the third direction, and it is beneficial to shorten the extension path of the second cable group, which is beneficial to saving materials and is also conducive to arranging other structural components such as power devices in the box, further improving the space utilization rate in the box. In addition, since along the third direction, the first access port group and the fourth access port group are located between the second access port group and the first end, the first access port group and the fourth access port group are also located between the third access port group and the first end, and along the second direction, the second bundle is closer to the power conversion board than the third bundle. In other words, the first access port group and the fourth access port group with the same polarity are arranged closer to the edge of the power conversion board along the third direction, and the second access port group and the third access port group with the opposite polarity to the first access port group and the fourth access port group are relatively farther away from the edge of the power conversion board along the third direction. Therefore, near the position where the second cable group accesses the fourth port group, the crossing between the second bundle and the third bundle can be further avoided, the short-circuit probability between the second bundle and the third bundle can be reduced, and further the short-circuit probability of the lead structure can be reduced.

[0023] In some embodiments, the fifth connection cable group includes a first cable segment group, a second cable segment group, and a third cable segment group connected in sequence. The first cable segment group connected to the first output port group extends from the first output port group in a direction away from the fourth port group. The second cable segment group is adjacent to the wall surface of the first box body and extends along a second direction and is fixed to the first box body wall. The third cable segment group and the eighth connection cable group are bundled into the second bundle. The sixth connection cable group, the seventh connection cable group, and the eighth connection cable group extend from the third port group in a direction close to the fourth port group.

[0024] Thus, near the vicinity of the third port group, the extending directions of the second cable groups with opposite polarities are opposite, and the fifth connection cable group can avoid the sixth connection cable group and the seventh connection cable group and be bundled with the eighth connection cable group into the second bundle, thereby further preventing the second cable groups with opposite polarities from approaching and crossing each other, reducing the probability of a short circuit occurring between the second cable groups with opposite polarities, and further reducing the short circuit probability of the lead structure. In addition, since the sixth connection cable group and the seventh connection cable group have the same polarity, there is no need to deliberately make it far away from the seventh connection cable group in the second direction, which is convenient for avoiding the problem of lap short circuit between the sixth connection cable group and the fifth connection cable group near the third port group; further, since the fifth connection cable group and the eighth connection cable group have the same polarity, and the sixth connection cable group and the seventh connection cable group have the same polarity, when configuring or adjusting the distance between the second bundle and the third bundle in the second direction, the fifth connection cable group and the sixth connection cable group will not move significantly, and the configuration or adjustment of the bundle distance is easier.

[0025] The beneficial effects of the present utility model include: being able to reduce the probability of short circuit and DC arcing phenomena of the lead structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0027] Figure 1 is a schematic structural diagram of a photovoltaic inverter provided by some embodiments of the present utility model;

[0028] Figure 2 is Figure 1 a partial enlarged schematic diagram of area A of

[0029] Figure 3 is a schematic structural diagram of a photovoltaic inverter from another angle provided by some embodiments of the present utility model;

[0030] Figure 4 is Figure 3 a partial enlarged schematic view of region B of

[0031] Figure 5 is Figure 3 a partial enlarged schematic view of region C of

[0032] Figure 6 is a schematic structural view of a photovoltaic inverter from another angle provided by some embodiments of the present utility model;

[0033] Figure 7 is Figure 6 a partial enlarged schematic view of region D of

[0034] Description of Reference Numerals

[0035] 1 Photovoltaic Inverter; 11 Cabinet; 111 Accommodating Space; 112 First Cabinet Wall; 12 Power Conversion Board; 121 Fourth Port Group; 1211 First Access Port Group; 1212 Second Access Port Group; 1213 Third Access Port Group; 1214 Fourth Access Port Group; 122 First End; 2 Lead Structure; 21 First Port Group Array (Photovoltaic Connector Array); 211 First Port Group (Photovoltaic Connector Group); 21111 First Port (Photovoltaic Connector); 2111 First Port Row 2111; 2112 Second Port Row 2112; 2113 Third Port Row 2113; 2114 Fourth Port Row 2114; 22 Changeover Switch Device; 221 Second Port Group; 22111 Second Port; 2211 First Input Port Group; 2212 Second Input Port Group; 2213 Third Input Port Group; 2214 Fourth Input Port Group; 222 Third Port Group; 22211 Third Port; 2221 First Output Port Group; 2222 Second Output Port Group; 2223 Third Output Port Group; 2224 Fourth Output Port Group; 23 First Cable Group; 2311 First Cable; 231 First Connection Cable Group; 232 Second Connection Cable Group; 233 Third Connection Cable Group; 234 Fourth Connection Cable Group; 24 First Cable Fixing Device; 241 Fixing Hole; 251 First Bunch; 252 Second Bunch; 253 Third Bunch; 254 Second Fixing Device; 26 Second Cable Group; 261 Fifth Connection Cable Group; 2611 First Cable Segment Group; 2612 Second Cable Segment Group; 2613 Third Cable Segment Group; 262 Sixth Connection Cable Group; 263 Seventh Connection Cable Group; 264 Eighth Connection Cable Group; X First Direction; Y Second Direction; Z Third Direction. Detailed Embodiments

[0036] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and therefore are only examples and cannot be used to limit the protection scope of the present utility model.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model; the terms "comprising" and "having" and any variations thereof in the present utility model are intended to cover non-exclusive inclusion.

[0038] In the description of the embodiments of the present utility model, technical terms such as "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the present utility model. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0040] In the description of the embodiments of the present utility model, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0041] In the description of the embodiments of the present utility model, the orientation or positional relationship indicated by technical terms such as "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed, operated or used in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present utility model.

[0042] In the description of the embodiments of the present utility model, unless otherwise clearly specified or limited, technical terms such as "installation", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0043] In the description of the embodiments of the present utility model, unless otherwise clearly specified or limited, the technical term "contact" shall be understood in a broad sense. It can be direct contact or contact through an intermediate medium layer. It can be contact where there is basically no mutual force between the two in contact, or contact where there is a mutual force between the two in contact.

[0044] In the description of the embodiments of the present utility model, unless otherwise clearly specified or limited, the technical terms "parallel" and "perpendicular" both allow a certain degree of tolerance and / or error, including cases of approximately parallel and approximately perpendicular.

[0045] Next, the embodiments of the present utility model will be described in detail.

[0046] Solar photovoltaic power generation is a renewable energy power generation technology with sustainable development. It is predicted that solar photovoltaic power generation will occupy an important position in the world's energy consumption in the 21st century. It will not only replace some conventional energy sources, but also become the main body of the world's energy supply.

[0047] The photovoltaic inverter is one of the important devices in the photovoltaic power generation system. Among them, the photovoltaic inverter usually includes a lead structure. However, there are cases of short circuits in the lead structure. Therefore, how to reduce the short - circuit probability of the lead structure to avoid the harm of DC arcing has become one of the research topics in the industry.

[0048] In the prior art, male and female photovoltaic connectors that belong to different photovoltaic connector groups and have opposite polarities are adjacent in a photovoltaic connector array. Through research, it is found that the layout of the above-mentioned photovoltaic connector array may cause a fault of DC arcing, resulting in the failure of the inverter. After analysis, during the routing of the internal cables, there is a situation where the cables with different polarities cross each other in the lead structure. Therefore, the creepage distance between the cables with different polarities is relatively short, and the probability of short circuit is relatively high. Moreover, due to the relatively high internal temperature of the photovoltaic inverter, during the long-term operation of the photovoltaic inverter, the temperature of the cable material is relatively high, which will soften the insulating material wrapping the cable material. When the cable is fixed at both ends along the length direction of the cable, the cable may tilt in a direction crossing the length direction of the cable. Therefore, it is possible that the cables with different polarities overlap, resulting in a short circuit of the cable and further damaging the lead structure. In addition, the cables are usually fixed by cable ties. At the position where the cable ties are fixed, the insulating outer skin of the cable may be damaged due to the teeth in the cable ties, resulting in a thinner thickness of the insulating outer skin and thus a weaker insulating strength of the cable. If the cables with different polarities cross or overlap in routing at this time, it is possible to cause a short circuit between the cables with different polarities and DC arcing. Considering that the size of the box body of the photovoltaic inverter is limited and there are many cable fixing points in the box body, it is difficult to find a large space in the box body to set multiple fixing points that can keep the cables with different polarities away from each other, and the actual operation is relatively difficult. Moreover, in the layout of the first port group array in the prior art, even if the distance between the cables connecting the two first ports of the same first port group is adjusted, it will result in a shortening of the distance between the cables connecting the first ports with different polarities that are adjacent and belong to different first port groups, and it is also easy to cause a situation of straight-line arcing between the cables with different polarities, resulting in a short circuit of the lead structure.

[0049] To reduce the occupied space of the lead structure and increase the creepage distance between the cables with different polarities, the photovoltaic connectors with the same polarity can be arranged adjacent to each other, so that the cables with the same polarity that are correspondingly connected are arranged adjacent and close to each other. Thereby, the distance between the cables with opposite polarities can also be increased, reducing the short-circuit probability between the cables with different polarities of the lead structure, and further reducing the short-circuit probability of the lead structure.

[0050] To achieve the above object, an embodiment of the present invention provides a photovoltaic inverter, including a box body having an accommodation space, and the box body has a first box wall perpendicular to the first direction; the photovoltaic connector array includes a plurality of photovoltaic connector groups arranged along the second direction and the third direction respectively; wherein, each of the photovoltaic connector groups includes a male photovoltaic connector and a female photovoltaic connector that are adjacent along the second direction and have opposite polarities, the polarities of the two photovoltaic connectors that are adjacent along the second direction and belong to different photovoltaic connector groups are the same, and the polarities of the photovoltaic connectors arranged along the third direction are the same.

[0051] Based on the fact that the polarity orders of adjacent photovoltaic connector groups in the photovoltaic connector array are different from each other along the second direction, such that two photovoltaic connectors adjacent along the second direction and belonging to different photovoltaic connector groups have the same polarity. Therefore, it is suitable to make the spacing between the cables connected to the photovoltaic connectors with the same polarity and connected to each other shorter on this basis, and conversely increase the spacing between the cables with different polarities and adjacent to each other and the creepage distance, reducing the probability of cable lap short circuit and DC arcing phenomenon, which is especially applicable when the size of the box in the second direction is limited.

[0052] The photovoltaic inverter of the embodiment of the present utility model is a string-type inverter with a relatively small machine volume.

[0053] Next, Figures 1 to 7 Some embodiments of the photovoltaic inverter of the present utility model will be described in detail.

[0054] Figure 1 The structural schematic diagram of the photovoltaic inverter provided for some embodiments of the present utility model; Figure 2 For Figure 1 The partial enlarged schematic diagram of area A of Figure 3 The structural schematic diagram of the photovoltaic inverter from another angle provided for some embodiments of the present utility model; Figure 4 For Figure 3 The partial enlarged schematic diagram of area B of Figure 5 For Figure 3 The partial enlarged schematic diagram of area C of Figure 6 The structural schematic diagram of the photovoltaic inverter from another angle provided for some embodiments of the present utility model; Figure 7 For Figure 6 The partial enlarged schematic diagram of area D of

[0055] In the description of the embodiments of the present disclosure, for the convenience of description, the direction where the arrow X is located is used to represent the "first direction", the direction where the arrow Y is located is used to represent the "second direction", and the direction where the arrow Z is located is used to represent the "third direction".

[0056] As Figures 1 to 5As shown in the figure, the present utility model provides a photovoltaic inverter 1, which includes a box body 11 having an accommodation space 111. The box body 11 has a first box wall 112 perpendicular to the first direction X. The photovoltaic inverter 1 further includes a photovoltaic connector array 21, which includes a plurality of photovoltaic connector groups 211 arranged along the second direction Y and the third direction Z respectively. Each of the photovoltaic connector groups 211 includes a male photovoltaic connector and a female photovoltaic connector adjacent to each other along the second direction Y and having opposite polarities. The polarities of two photovoltaic connectors 21111 adjacent to each other along the second direction Y and belonging to different photovoltaic connector groups 211 are the same. The polarities of the photovoltaic connectors 21111 arranged along the third direction Z are the same. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0057] In a specific embodiment, an accommodation space 111 is formed inside the box body 11. The photovoltaic inverter 1 further includes a photovoltaic connection plate, which is parallel to the first box wall 112 and is disposed close to the first box wall 112. Each of the photovoltaic connectors 21111 penetrates through the first box wall 112. One end thereof is used for connecting to an external photovoltaic module (PV panel), and the other end extends into the accommodation space 111 and is welded to one side of the photovoltaic connection plate. A first port group array 21 corresponding to the photovoltaic connector array is further formed on the other side of the photovoltaic connection plate.

[0058] The photovoltaic inverter 1 further includes a lead structure 2, and the lead structure 2 includes the first port group array 21. The first port group array 21 is disposed on the first box wall 112 and includes a plurality of first port groups 211 arranged along the second direction Y and the third direction Z respectively. Each of the first port groups 211 includes two first ports 21111 adjacent to each other along the second direction Y and having opposite polarities. The polarities of two first ports 21111 adjacent to each other along the second direction Y and belonging to different first port groups 211 are the same. The polarities of the first ports 21111 arranged along the third direction Z are the same.

[0059] The lead structure 2 further includes a changeover switch device 22, which is located in the accommodation space 111 and has a handle extending out of the box body 11 for on / off control. The changeover switch device 22 is located on one side of the first port group array 21 along the third direction Z, and a plurality of second port groups 221 spaced from each other are formed along the second direction Y. The polarities of the second ports 22111 in each second port group 221 are the same as those of the corresponding first ports 21111 in the first port group array 21 along the third direction Z; and multiple groups of first cable groups 23 are located in the accommodation space 111. Each first cable group 23 includes a plurality of first cables 2311 extending along the third direction Z. The first cables 2311 are used to connect the corresponding first ports 21111 and second ports 22111 along the third direction Z; wherein, along the second direction Y, the distance D between adjacent first cable groups 23 with the same polarity is less than the distance L between adjacent first cable groups 23 with opposite polarities.

[0060] In the present utility model, the lead structure 2 refers to multiple cables, electrical components connected by the cables, and components for fixing the positions of the cables.

[0061] As Figure 1 shown, the photovoltaic inverter 1 includes a box body 11 having an accommodation space 111. The box body 11 has a first box wall 112 perpendicular to the first direction X.

[0062] Optionally, the box body 11 can be rectangular, a prism, or other irregular shapes, etc.

[0063] Optionally, the first box wall 112 can be a bottom wall, a top wall, or a side wall, etc. In a specific embodiment, the box body 11 is suspended on a wall, and the first box wall 112 is the bottom wall of the box body 11.

[0064] In some embodiments, the box body 11 can be made of insulating material.

[0065] In some embodiments, as Figure 3 shown, the lead structure 2 includes a first port group array 21 and a changeover switch device 22. The first port group array 21 and the changeover switch device 22 are electrically connected through the first cable groups 23. In a specific embodiment, the first port group array 21 is electrically connected to a photovoltaic panel (not shown). The photovoltaic panel (PV) converts solar energy into electrical energy, generates an electrical signal, the electrical signal is transmitted to the first port group array 21 through a cable, and the electrical signal is further transmitted to the changeover switch device 22 through the first cable groups 23. Further, the electrical signal is a direct current electrical signal.

[0066] In some embodiments, as Figure 1 and Figure 3As shown, the first port group array 21 is disposed on the first box wall 112, and the specific position of the first port group array 21 on the first box wall 112 is not limited. In a specific embodiment, the first port group array 21 is generally disposed at the middle position of the first box wall 112.

[0067] In some embodiments, as Figure 1 and Figure 2 shown, a plurality of first port groups 211 are arranged at intervals along the second direction Y, and a plurality of first port groups 211 are arranged at intervals along the third direction Z, thereby forming the first port group array 21. Among them, the number of first port groups 211 arranged along the second direction Y can be two, three, four or more, etc. In a specific embodiment, the number of first port groups 211 arranged along the second direction Y can be two; the number of first port groups 211 arranged along the third direction Z can be two, three, four or more, etc. Among them, the first direction X, the second direction Y and the third direction Z are perpendicular to each other in pairs.

[0068] In some embodiments, as Figure 2 shown, each first port group 211 includes two first ports 21111 arranged at intervals along the second direction Y. Among them, these two first ports 21111 are adjacent and have opposite polarities. For example, one of the first ports 21111 is the positive pole and the other first port 21111 is the negative pole.

[0069] In the first port group array 21, the polarities of two first ports 21111 that are adjacent along the second direction Y and belong to different first port groups 211 are the same. Taking Figure 2 the orientation shown as an example, that is, along the second direction Y, the polarities carried by the first ports 21111 can be positive pole polarity, negative pole polarity, negative pole polarity, positive pole polarity, positive pole polarity, negative pole polarity, negative pole polarity, positive pole polarity, etc.; of course, along the second direction Y, the polarities carried by the first ports 21111 can also be negative pole polarity, positive pole polarity, positive pole polarity, negative pole polarity, negative pole polarity, positive pole polarity, positive pole polarity, negative pole polarity, etc.

[0070] In a specific embodiment, as Figure 2 shown, along the second direction Y, the polarities of the first ports 21111 located at both ends are the same, and the polarities of the two middle first ports 21111 are the same.

[0071] In some embodiments, as Figure 2 shown, the first ports 21111 are arranged at intervals along the second direction Y, and the distances between the first ports 21111 along the second direction Y can be equal or unequal. Of course, the distance between adjacent first ports 21111 with the same polarity can also be smaller than the distance between adjacent first ports 21111 with opposite polarities.

[0072] In some embodiments, as Figure 2 shown, the polarities of the first ports 21111 arranged along the third direction Z are the same, for example, they can all be positive or negative. The third direction Z is perpendicular to the first direction X and the second direction Y.

[0073] In some embodiments, as Figures 3 to 5 shown, the switching device 22 is located in the accommodation space 111. The switching device 22 is located on one side of the first port group array 21 along the third direction Z (for example Figure 3 the left or right side shown); of course, there can also be two switching devices 22, and the two switching devices 22 are respectively located on both sides of the first port group array 21 along the third direction Z (for example Figure 3 the left and right sides shown). Among them, a part of the first ports 21111 in the first port group array 21 is electrically connected to one of the switching devices 22, and the other part is electrically connected to the other switching device 22. Of course, there can also be 3 or more switching devices 22.

[0074] As Figure 2 , Figure 3 and Figure 5 shown, the switching device 22 has a plurality of second port groups 221 arranged at intervals along the second direction Y. The switching device 22 also has a plurality of second port groups 221 arranged at intervals along the first direction Y. Each second port group 221 includes two second ports 22111 arranged at intervals along the second direction Y. Along the second direction Y, the polarities of the second ports 22111 are the same as those of the corresponding first ports 21111 along the third direction Z.

[0075] As Figure 3 and Figure 4 shown, a plurality of first cable groups 23 are located in the accommodation space 111. Each first cable group 23 includes a plurality of first cables 2311 extending substantially along the third direction Z. The first cables 2311 are used to connect the first ports 21111 and the second ports 22111 corresponding along the third direction Z. Among them, the first cables 2311 extending along the third direction Z means that the overall direction of the first cables 2311 is to extend along the third direction Z. Of course, some structures in the first cables 2311 can extend along the first direction X. For example, the part of the first cables 2311 connected to the first ports can extend along the first direction X.

[0076] In a specific embodiment, as Figures 1 to 5 shown, the first port group 211 can be 30 groups. The 30 groups of first port groups 211 are electrically connected to the photovoltaic connection board. The photovoltaic connection board has 15 groups of output ports, and the 15 groups of output ports are respectively electrically connected to 3 groups of switching devices 22.

[0077] In some embodiments, such as Figure 4 shown, along the second direction Y, the distance D between adjacent first cable groups 23 with the same polarity is less than the distance L between adjacent first cable groups 23 with opposite polarities. That is, the distance D between the second connection cable group 232 and the third connection cable group 233 is less than the distance L between the first connection cable group 231 and the fourth connection cable group 234. Further, the second connection cable group 232 and the third connection cable group 233 can be tied into a bundle by a first tying member (not shown). The first tying member can be a zip tie or a cable tie.

[0078] In some embodiments, the outer surface of the first cable 2311 in the first cable group 23 is wrapped with an insulating substance, such as insulating rubber.

[0079] Therefore, the electrical connection between the first port group 211 and the second port group 221 can be achieved, and further the electrical connection between the first port group array 21 and the switch device 22 can be achieved. In addition, since the polarities of two first ports 21111 that are adjacent along the second direction Y and belong to different first port groups 211 are the same, the distance between the first ports 21111 with the same polarity is shortened, thereby increasing the creepage distance between the first ports 21111 with opposite polarities and reducing the short-circuit probability between the first ports 21111 with opposite polarities; and, since the distance D between adjacent first cable groups 23 with the same polarity is less than the distance L between adjacent first cable groups 23 with opposite polarities, the creepage distance between the first cable groups 23 with opposite polarities is larger, thereby reducing the short-circuit probability between the first cable groups 23 with different polarities, and further reducing the short-circuit probability of the lead structure 2.

[0080] In some embodiments, such as Figures 1 to 5 shown, the first port group array 21 includes a first port row 2111, a second port row 2112, a third port row 2113, and a fourth port row 2114 arranged in sequence along the second direction Y from the first side to the second side (such as Figure 2 the direction from top to bottom shown), the second port group 221 is located on a side of the switch device 22 perpendicular to the third direction Z and close to the first port group array 21 (such as Figure 3 and Figure 5 the left side shown), the second port group 221 includes a first side to a second side along the second direction Y (such as Figure 3 and Figure 5 the direction from right to left shown, that is Figure 2a first input port group 2211, a second input port group 2212, a third input port group 2213, and a fourth input port group 2214 arranged in sequence in the top-to-bottom direction (as shown), the first cable group 23 includes a first connection cable group 231, a second connection cable group 232, a third connection cable group 233, and a fourth connection cable group 234 that extend along the third direction Z and are arranged at intervals along the second direction Y. The first connection cable group 231 connects the first port of the first port row 2111 and the second ports of the first input port group 2211. The second connection cable group 232 connects the first port of the second port row 2112 and the second ports of the second input port group 2212. The third connection cable group 233 connects the first port of the third port row 2113 and the second ports of the third input port group 2213. The fourth connection cable group 234 connects the first port of the fourth port row 2114 and the second ports of the fourth input port group 2214.

[0081] In an embodiment of the present invention, for the convenience of description, two groups of the first port group 211 arranged along the second direction Y are taken as an example. Those skilled in the art can expand it to three groups, four groups, five groups, etc. of the first port group 211 arranged along the second direction Y according to needs.

[0082] As Figures 2 to 5 shown, the first connection cable group 231, the second connection cable group 232, the third connection cable group 233, and the fourth connection cable group 234 may respectively have multiple first cables 2311, and the first cables 2311 are used for electrically connecting the first port 21111 and the second port 22111.

[0083] Thereby, the first port 21111 can be electrically connected to the second port 22111, so that the first port group array 21 is electrically connected to the switching device 22. And, since the second port group 221 is located on a surface of the switching device 22 perpendicular to the third direction Z and close to the first port group array 21, the first cable group 23 can extend along the second direction Y to achieve the electrical connection between the first port 21111 and the switching device 22, shortening the extension path of the first cable group 23, which is beneficial to saving materials, reducing costs, and also beneficial to the neatness of the wiring layout.

[0084] In some embodiments, such as Figure 3 and Figure 4As shown, the lead wire structure 2 further includes a first wire fixing device 24, which has a plurality of fixing holes 241 spaced from each other along the second direction Y. Each fixing hole 241 is used to fix the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234 respectively through a first wire bundling member (not shown), so that the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234 are spaced along the second direction Y. Among them, the first bundle 251 is formed by bundling the second connection cable group 232 and the third connection cable group 233 with a first wire tying member (not shown).

[0085] In some embodiments, as Figure 4 shown, the second connection cable group 232 and the third connection cable group 233 can be bundled into a first bundle 251 by using a first wire tying member (not shown). The first wire tying member (not shown) can be a cable tie or a wire bundling belt.

[0086] In some embodiments, as Figure 4 shown, the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234 can be fixed to the fixing holes 241 of the first wire fixing device 24 by using a first wire bundling member (not shown).

[0087] Optionally, the first wire fixing device 24 can have a plurality of fixing holes 241 spaced from each other along the second direction Y. The fixing holes 241 can be three, four, five or more. The present invention does not specifically limit the shape of the fixing holes 241. In a specific embodiment, the intervals between the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234 along the second direction Y are increased as much as possible. Thus, the creepage distance between the first cable groups 23 of different polarities can be increased, thereby reducing the short - circuit probability between the first cable groups 23 of different polarities.

[0088] The present invention does not specifically limit the shape of the first fixing device 24. In a specific embodiment, the first wire fixing device 24 can be a flat plate extending along the second direction Y.

[0089] In some embodiments, the first wire fixing device 24 can be fixed to the side wall that is connected to the first box body wall 112 and perpendicular to the second direction Y. There can be multiple first wire fixing devices 24, and the multiple first wire fixing devices 24 can be arranged at intervals along the third direction Z.

[0090] Since the second connection cable group 232 and the third connection cable group 233 are bundled into a first bundle 251 by the first cable tie, the creepage distance between the first cable groups 23 of different polarities can be further increased, thereby further reducing the short-circuit probability between the first cable groups 23 of different polarities, and further reducing the short-circuit probability of the lead structure 2. In addition, since the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234 are fixedly spaced along the second direction Y by the first cable fixing device 24, the distance of the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234 along the second direction Y can be fixed and is not easily affected by external vibrations, thereby reducing the short-circuit probability between the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234, and further reducing the short-circuit probability of the lead structure 2.

[0091] In some embodiments, as Figures 5 to 7 shown, on the other side of the changeover switch device 22 perpendicular to the third direction Z (for example Figure 6 the lower surface shown), a third port group 222 is formed. Each third port 22211 in the third port group 222 has the same polarity as the corresponding second port 22111 in the second port group 221 along the third direction Z. The third port group 222 includes from the first side to the second side (for example Figure 7 the direction from top to bottom, that is Figure 3 and Figure 5a first output port group 2221, a second output port group 2222, a third output port group 2223, and a fourth output port group 2224 arranged in sequence in the right-to-left direction (the direction shown) and spaced apart from each other along the second direction Y; the photovoltaic inverter 1 further includes a power conversion board 12 perpendicular to the second direction Y, and the lead structure 2 further includes a second cable 26. Thus, the electrical connection between the photovoltaic connector array 21 and the power conversion board 12 is achieved through the lead structure 2. Specifically, the power conversion board 12 is located in the accommodation space 111, and the power conversion board 12 has a fourth port group 121. The fourth port group 121 includes a first access port group 1211 having the same polarity as the first output port group 2221, a second access port group 1212 having the same polarity as the second output port group 2222, a third access port group 1213 having the same polarity as the third output port group 2223, and a fourth access port group 1214 having the same polarity as the fourth output port group 2224; the second cable group 26 is located in the accommodation space 111, and the second cable group 26 includes a fifth connection cable group 261 connecting the first output port group 2221 and the first access port group 1211, a sixth connection cable group 262 connecting the second output port group 2222 and the second access port group 1212, a seventh connection cable group 263 connecting the third output port group 2223 and the third access port group 1213, and an eighth connection cable group 264 connecting the fourth output port group 2224 and the fourth access port group 1214.

[0092] In some embodiments, as Figure 3 shown, the conversion switch device 22 is arranged at an interval from the power conversion board 12, and the first wire fixing device 24 is arranged at an interval from the power conversion board 12.

[0093] In some embodiments, as Figure 7 shown, a third port group 222 is provided on another surface of the conversion switch device 22 perpendicular to the third direction Z, and the power conversion board 12 has a fourth port group 121. The third port group 222 is electrically connected to the fourth port group 121 through the second cable group 26. That is, the DC electrical signal transmitted to the conversion switch device 22 is transmitted to the power conversion board 12 through the second cable group 26. In a specific embodiment, the power conversion board 12 may be a power conversion board with an inversion function, and the power conversion board can convert a DC (direct current) electrical signal into an AC (alternating current) electrical signal and has an MPPT function to maximize the output power of the photovoltaic module.

[0094] In some embodiments, as Figure 7As shown, the polarities of the first output port group 2221, the fourth output port group 2224, the first access port group 1211, and the fourth access port group 1214 are the same, and the polarities of the second output port group 2222, the third output port group 2223, the third access port group 1213, and the second access port group 1212 are the same. The polarities of the first output port group 2221 and the second output port group 2222 are opposite.

[0095] In some embodiments, the outer surface of the second cable in the second cable group 23 is wrapped with an insulating material, such as insulating rubber.

[0096] Thereby, the electrical connection between the third port group 222 and the fourth port group 121 can be realized, and further the electrical connection between the switching device 22 and the power conversion board 12 can be realized. When applied to a photovoltaic inverter, it realizes the access of the electrical energy of multiple photovoltaic modules (PV panels) to the power conversion board with the MPPT function, and realizes the MPPT (maximum power point tracking) of multiple photovoltaic inputs.

[0097] In some embodiments, as Figure 6 shown, the switching device 22 is located near one end of the power conversion board 12 along the third direction Z, and near one end of the power conversion board 12 along the first direction X close to the first box wall 112. The fourth port group 121 is provided on the power conversion board 12. The fourth port group 121 is located on the side of the switching device 22 away from the first box wall 112, and near the first end 122 of the power conversion board 12 along the third direction Z close to the switching device 22. The fifth connection cable group 261, the sixth connection cable group 262, the seventh connection cable group 263, and the eighth connection cable group 264 extend along the first direction X and are arranged at intervals along the second direction Y.

[0098] In some embodiments, as Figure 6 shown, the switching device 22 is located near one end of the power conversion board 12 along the third direction Z (such as Figure 6 the lower end shown), and the switching device 22 is also located near one end of the power conversion board 12 along the first direction X close to the first box wall 112 (such as Figure 6 the left end shown). The switching device 22 is arranged at an interval from the power conversion board 12.

[0099] In some embodiments, in the third direction Z, the fourth port group 121 has a first end 122 close to the first box wall 112 (such as Figure 6 the lower end shown), and the fourth port group 121 is provided at a position on the power conversion board 12 close to the first end 122. The first end 122 refers to the end of the power conversion board 12 closer to the third port group along the third direction.

[0100] In some embodiments, such as Figure 6 and Figure 7 shown, the fifth connection cable group 261, the sixth connection cable group 262, the seventh connection cable group 263, and the eighth connection cable group 264 all generally extend along the first direction X. That is, the main extension direction of the fifth connection cable group 261, the sixth connection cable group 262, the seventh connection cable group 263, and the eighth connection cable group 264 is the first direction X. Of course, a part of the first cable in the fifth connection cable group 261, the sixth connection cable group 262, the seventh connection cable group 263, and the eighth connection cable group 264 may also extend along the third direction Z. For example, the part of the second cable group 26 connecting the switchgear 22 may extend along the third direction Z.

[0101] Thus, the first cable group 23 can generally extend along the first direction X to achieve the electrical connection between the third port group 222 and the fourth port group 121, shortening the extension paths of the fifth connection cable group 261, the sixth connection cable group 262, the seventh connection cable group 263, and the eighth connection cable group 264, which is beneficial to saving materials, reducing costs, and also beneficial to the neatness of the wiring layout.

[0102] In some embodiments, such as Figure 6 and Figure 7 shown, the photovoltaic inverter further includes a functional board (not shown). The functional board (not shown) is located in the accommodation space 111, perpendicular to the second direction Y and arranged at an interval along the second direction Y from the power conversion board 12. The functional board (not shown) and the power conversion board 12 are on the same side of the switchgear 22 along the first direction X (for example Figure 6 shown on the right side), and the functional board (not shown) and the power conversion board 12 are on the same side of the switchgear 22 along the third direction Z (for example Figure 6 shown on the upper side). Along the second direction Y, the second cable group 26 is located between the power conversion board 12 and the functional board. The fifth connection cable group 261 and the eighth connection cable group 264 are bundled into a second bundle 252 by a second bundling member (not shown), and the sixth connection cable group 262 and the seventh connection cable group 263 are bundled into a third bundle 253 by a third bundling member (not shown). Along the second direction Y, the second bundle 252 and the third bundle 253 are arranged at an interval.

[0103] In some embodiments, such as Figure 6 shown, other components of the electrical device are provided on the functional board (not shown). In some specific embodiments, the functional board can be the main control board, auxiliary power supply board, DC filter board, AC filter board of the photovoltaic inverter, or a combination thereof. The functional board (not shown) and the power conversion board 12 are arranged at an interval along the second direction Y, and the functional board (not shown) and the power conversion board 12 are generally parallel.

[0104] Optionally, the second wire bundling member (not shown) can be a cable tie or a wire harness strap. The third wire bundling member (not shown) can be a cable tie or a wire harness strap.

[0105] In some embodiments, as Figure 7 shown, the second bundle 252 and the third bundle 253 can be arranged at intervals along the second direction Y. In a specific embodiment, along the second direction Y, the second bundle 252 is closer to the power conversion board 12 than the third bundle 253.

[0106] Since the fifth connection cable group 261 and the eighth connection cable group 264 are bundled into the second bundle 252 by the second wire bundling member (not shown), and the sixth connection cable group 262 and the seventh connection cable group 263 are bundled into the third bundle 253 by the third wire bundling member (not shown), and the second bundle 252 and the third bundle 253 are arranged at intervals along the second direction Y, therefore, within the space formed between the power conversion board 12 and the function board (not shown), the distance between the second cable groups 26 of different polarities along the second direction Y can be increased, thereby reducing the short - circuit probability between the second cable groups 26 of different polarities, and further reducing the short - circuit probability of the lead structure 2.

[0107] In some embodiments, as Figure 3 , Figure 6 and Figure 7 shown, the lead structure 2 further includes a second fixing device 254. Along the second direction Y, the second bundle 252 and the third bundle 253 are respectively fixed to the second fixing device 254 at intervals through a second wire harness member (not shown).

[0108] Optionally, the second wire harness member (not shown) can be a cable tie or a wire harness strap.

[0109] In some embodiments, as Figure 3 and Figure 6 shown, the second fixing device 254 is located within the accommodation space 111. The second wire harness member (not shown) is fixed to the wall of the box body 11 perpendicular to the second direction Y (such as Figure 3 the side wall shown). The second fixing device 254 is arranged at an interval from the power conversion board 12. The second fixing device 254 can be one or more, and multiple second fixing devices 254 can be arranged at intervals along the first direction X.

[0110] In some embodiments, as Figure 5 and Figure 7As shown, along the second direction Y, the second fixing device 254 does not extend beyond the functional board (not shown). The length of the second fixing device 254 along the second direction Y is limited by the spacing between the power conversion board and the functional board along the second direction Y. The present invention does not specifically limit the shape of the second fixing device 254. In one specific embodiment, the second fixing device 254 is cylindrical and extends along the second direction Y.

[0111] The present invention does not specifically limit the positions at which the second bundle 252 and the third bundle 253 can be fixed to the second fixing device 254 at intervals along the second direction Y. In a specific embodiment, the second bundle 252 and the third bundle 253 are fixed to both ends of the second fixing device 254 along the second direction Y.

[0112] As a result, the distance between the second bundle 252 and the third bundle 253 along the second direction Y is fixed, so the distance between the second bundle 252 and the third bundle 253 along the second direction Y is not easily affected by external vibrations, thereby reducing the probability of short circuit between the second bundle 252 and the third bundle 253, and further reducing the probability of short circuit of the lead structure 2.

[0113] In some embodiments, as Figure 6 and Figure 7 As shown, the switching device 22 is located at one end of the power conversion board 12 along the third direction Z (eg Figure 6 and is located near an end 122 of the power conversion board 12 along the first direction X close to the first box wall 112 (e.g. Figure 6 Near the left end shown in the figure, the fourth port group 121 is arranged on the power conversion board 12, and the fourth port group 121 is located on the side of the conversion switch device 22 away from the first box wall 112, and is close to the first end 122 of the conversion switch device 22 along the third direction Z of the power conversion board 12. Along the third direction Z, the first access port group 1211 and the fourth access port group 1214 are located between the second access port group 1212 and the first end 122, and the first access port group 1211 and the fourth access port group 1214 are also located between the third access port group 1213 and the first end 122. Along the second direction Y, the second bundle 252 is closer to the power conversion board 12 than the third bundle 253.

[0114] like Figure 7 As shown, along the second direction Y, the second bundle 252 is closer to the power conversion board 12 than the third bundle 253. Along the third direction Z, the first access port group 1211 and the fourth access port group 1214 are located between the second access port group 1212 and the first end 122; along the third direction Z, the first access port group 1211 and the fourth access port group 1214 are also located between the third access port group 1213 and the first end 122. That is, Figure 7Taking the orientation shown as an example, the second access port group 1212 and the third access port group 1213 are located above the first access port group 1211 and the fourth access port group 1214. Thus, when the second cables in the fifth connection cable group 261, the second cables in the sixth connection cable group 262, the second cables in the seventh connection cable group 263, and the second cables in the eighth connection cable group 264 are respectively connected to the corresponding fourth ports in the fourth port group 121, the crossing between the second cables of different polarities can be avoided, thereby reducing the short - circuit probability between the second cables of different polarities.

[0115] Since the switching device 22 is located between one end of the power conversion board 12 and the first box body wall 112, it is beneficial for the first cable group 23 to extend near the position of the first box body wall 112, thus facilitating the arrangement of other structural components such as power devices in the box body, and further improving the space utilization rate in the box body. Moreover, since the switching device 22 and the fourth port group 121 are located near the first end 122 of the power conversion board 12 along the third direction Z, it is beneficial for the second cable group 26 to extend along the first direction X and connect the switching device 22 and the fourth port group 121, and it is also beneficial to shorten the extension length of the second cable group 26, which is beneficial for saving materials, and is also beneficial for arranging other structural components such as power devices in the box body, further improving the space utilization rate in the box body. In addition, along the third direction Z, the first access port group 1211 and the fourth access port group 121 are located between the second access port group 1212 and the first end 122, and the first access port group 1211 and the fourth access port group are also located between the third access port group 1213 and the first end 122. And along the second direction Y, the second bundle 252 is closer to the power conversion board 12 than the third bundle 253. Therefore, near the connection of the second cable group 26 to the fourth port group 121, the crossing between the second bundle 252 and the third bundle 253 can be further avoided, reducing the short - circuit probability between the second bundle 252 and the third bundle 253, and further reducing the short - circuit probability of the lead structure.

[0116] In some embodiments, as Figure 7 shown, the fifth connection cable group 261 includes a first cable segment group 2611, a second cable segment group 2612, and a third cable segment group 2613 that are connected in sequence. The first cable segment group 2611 connected to the first output port group 2221 extends from the first output port group 2221 in a direction away from the fourth port group 121. The second cable segment group 2612 is adjacent to the wall surface of the first box body wall 112 and extends along the second direction Y and is fixed to the first box body wall 112. The third cable segment group 2613 is bundled with the eighth connection cable group 264 to form a second bundle 252. The sixth connection cable group 262, the seventh connection cable group 263, and the eighth connection cable group 264 extend from the third port group 222 in a direction close to the fourth port group 121.

[0117] In some embodiments, as Figure 7 As shown, the extension direction of the first cable segment group 2611 is opposite to the extension direction of the sixth connection cable group 262, the seventh connection cable group 263 and the eighth connection cable group 264, so that the second cable segment group 2612 can be located at a position away from the sixth connection cable group 262 and the seventh connection cable group 263 (for example, Figure 7 As shown, the second cable group 26 is adjacent to the first box wall 112 and extends in a direction close to the eighth connecting cable group 264, thereby avoiding the second cable groups 26 of different polarities from crossing and achieving the arrangement of bundling the second cable groups 26 of the same polarity into a bundle.

[0118] Further, if Figure 7 As shown, along the second direction Y, the connection between the first cable segment group 2611 and the second cable segment group 2612 is closer to the first output port group 2221 than the second output port group 2222; along the second direction Y, the connection between the second cable segment group 2612 and the third cable segment group 2613 is closer to the fourth output port group 2224 than the third output port group 2223. Therefore, the distance between the first cable segment group 2611 and the sixth connection cable group 262 along the second direction Y can be further increased, and the distance between the third cable segment group 2613 and the seventh connection cable group 263 along the second direction Y can be further increased, thereby further reducing the probability of short circuit between the first cable segment groups 2611 of different polarities.

[0119] Thus, near the third port group, the second cable groups with opposite polarities extend in opposite directions, and the fifth connecting cable group 261 can avoid the sixth connecting cable group 262 and the seventh connecting cable group 263 and the eighth connecting cable group 264 to form a second bundle 252, thereby further avoiding the second cable groups with opposite polarities from being close to and crossing each other, reducing the probability of short circuits between the second cable groups with opposite polarities, and thus reducing the probability of short circuits in the lead structure 2. Figure 7 Taking the orientation shown as an example, the sixth connecting cable group 262 extends to the lower right, and the seventh connecting cable group 263 extends to the upper right, whereby the two are converged into a third bundle 253. That is, along the second direction Y, the third bundle 253 is located between the second output port group 2222 and the third output port group 2223. Thus, near the third port group 222, the distance between the fifth connecting cable group 261 and the sixth connecting cable group 262 along the second direction Y is increased, and the distance between the seventh connecting cable group 263 and the eighth connecting cable group 264 along the second direction Y is increased. This further reduces the probability of a short circuit between the second cable groups of opposite polarity.

[0120] In some embodiments, as Figure 7As shown, a plurality of second fixing devices 254 are arranged at intervals along the first direction X. The fifth connection cable group 261 has multiple second cables, the sixth connection cable group 262 has multiple second cables, the seventh connection cable group 263 has multiple second cables, and the eighth connection cable group 264 has multiple second cables. At least one second cable in the sixth connection cable group 262 and at least one second cable in the seventh connection cable group 263 are supported at one end of each second fixing device 254 away from the power conversion board 12 along the second direction Y, and at least one second cable in the fifth connection cable group 261 and at least one second cable in the eighth connection cable group 264 are supported at one end of each second fixing device 254 close to the power conversion board 12 along the second direction Y.

[0121] The above is used to illustrate the technical solution of the present invention, rather than limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the present invention. In particular, if there is no special explanation, all embodiments and optional embodiments of the present invention can be combined with each other to form new technical solutions. If there is no special explanation, all technical features and optional technical features of the present invention can be combined with each other to form new technical solutions. The present invention is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the present invention.

Claims

1. A photovoltaic inverter, characterized in that: include: A box body having a first box body wall perpendicular to the first direction; and A photovoltaic connector array is arranged on the first box wall, and the photovoltaic connector array includes multiple photovoltaic connector groups arranged along the second direction and the third direction respectively; wherein each photovoltaic connector group includes a male photovoltaic connector and a female photovoltaic connector that are adjacent along the second direction and have opposite polarity, two photovoltaic connectors that are adjacent along the second direction and belong to different photovoltaic connector groups have the same polarity, and the polarity of each photovoltaic connector arranged along the third direction is the same; the first direction, the second direction and the third direction are perpendicular to each other.

2. The photovoltaic inverter according to claim 1, characterized in that: A storage space is formed in the box body, and also includes a photovoltaic connection plate arranged in the storage space; Each of the photovoltaic connectors passes through the first box wall, one end of which is used to connect to an external photovoltaic component, and the other end extends into the accommodating space and is welded to one side of the photovoltaic connection plate; A first port group array corresponding to the photovoltaic connector array is also formed on the other side of the photovoltaic connection plate; wherein, the first port group array includes multiple first port groups arranged along the second direction and the third direction respectively; wherein, each first port group includes two first ports adjacent to each other along the second direction and with opposite polarities, the two first ports adjacent to each other along the second direction and belonging to different first port groups have the same polarity, and the first ports arranged along the third direction have the same polarity.

3. The photovoltaic inverter according to claim 2, characterized in that: The photovoltaic connector includes a lead structure including the first port group array; The lead structure further includes: a transfer switch device, located in the accommodating space and having a handle extending outside the box and used for on / off control, the transfer switch device being located on one side of the first port group array along the third direction and having a plurality of second port groups spaced apart from each other formed along the second direction, the polarity of each second port in each second port group being the same as the polarity of each first port corresponding to the second port group in the first port group array along the third direction; and Multiple groups of first cable groups are located in the accommodating space, each of the first cable groups includes multiple first cables extending along the third direction, and the first cables are used to connect the corresponding first ports and second ports along the third direction; wherein, along the second direction, the distance between adjacent first cable groups with the same polarity is smaller than the distance between adjacent first cable groups with opposite polarity.

4. The photovoltaic inverter according to claim 3, characterized in that: The first port group array includes a first port row, a second port row, a third port row and a fourth port row arranged in sequence from the first side to the second side along the second direction; The second port group is located on a side of the transfer switch device that is perpendicular to the third direction and close to the array of the first port groups, and the second ports of the second port group form a first input port group, a second input port group, a third input port group, and a fourth input port group that are arranged in sequence from the first side to the second side along the second direction; The first cable group includes a first connecting cable group, a second connecting cable group, a third connecting cable group and a fourth connecting cable group extending along the third direction and arranged at intervals along the second direction, the first connecting cable group connecting the first port of the first port row and the second ports of the first input port group, the second connecting cable group connecting the first port of the second port row and the second ports of the second input port group, the third connecting cable group connecting the first port of the third port row and the second ports of the third input port group, and the fourth connecting cable group connecting the first port of the fourth port row and the second ports of the fourth input port group.

5. The photovoltaic inverter according to claim 4, characterized in that: Also includes The first wire fixing device is provided with a plurality of fixing holes spaced apart from each other along the second direction, each of the fixing holes is used to fix the first connecting cable group, the first bundle, and the fourth connecting cable group respectively through the first wire binding member, so that the first connecting cable group, the first bundle and the fourth connecting cable group are spaced apart along the second direction, wherein the first bundle is formed by the second connecting cable group and the third connecting cable group being bundled by the first wire binding member.

6. The photovoltaic inverter according to claim 4, characterized in that: A third port group is formed on another side of the transfer switch device perpendicular to the third direction, each third port in the third port group has the same polarity as each corresponding second port in the second port group along the third direction, and the third port group includes a first output port group, a second output port group, a third output port group, and a fourth output port group, which are arranged in sequence from the first side to the second side and spaced apart from each other along the second direction; The photovoltaic inverter further includes a power conversion board for realizing an inversion function; the lead structure further includes a second cable group perpendicular to the second direction; the photovoltaic connector array is electrically connected to the power conversion board through the lead structure; The power conversion board is located in the accommodation space, and has a fourth port group on the power conversion board, the fourth port group including a first access port group having the same polarity as the first output port group, a second access port group having the same polarity as the second output port group, a third access port group having the same polarity as the third output port group, and a fourth access port group having the same polarity as the fourth output port group; The second cable group is located in the accommodating space, and the second cable group includes a fifth connecting cable group connecting the first output port group and the first access port group, a sixth connecting cable group connecting the second output port group and the second access port group, a seventh connecting cable group connecting the third output port group and the third access port group, and an eighth connecting cable group connecting the fourth output port group and the fourth access port group.

7. The photovoltaic inverter according to claim 6, characterized in that: The photovoltaic inverter further includes a function board, the function board being located in the accommodation space, the function board being perpendicular to the second direction and spaced apart from the power conversion board along the second direction, the function board and the power conversion board being located on the same side of the conversion switch device along the first direction, and the function board and the power conversion board being located on the same side of the conversion switch device along the third direction; Along the second direction, the second cable group is located between the power conversion board and the function board, The fifth and eighth connection cable groups are bound into a second bundle by a second tie, and the sixth and seventh connection cable groups are bound into a third bundle by a third tie. The second bundle is spaced apart from the third bundle along the second direction.

8. The photovoltaic inverter according to claim 7, characterized in that: The lead structure further includes a second fixing device. Along the second direction, the second bundle and the third bundle are fixed to the second fixing device at intervals via second wire tying members.

9. The photovoltaic inverter according to claim 7, characterized in that: The transfer switch device is located near one end of the power conversion board along the third direction, and is located near one end of the power conversion board along the first direction close to the first box wall. The fourth port group is provided on the power conversion board, and the fourth port group is located on a side of the transfer switch device away from the first box wall, and is close to the first end of the power conversion board along the third direction close to the transfer switch device. Along the third direction, the first access port group and the fourth access port group are located between the second access port group and the first end, and the first access port group and the fourth access port group are also located between the third access port group and the first end, Along the second direction, the second bundle is closer to the power conversion board than the third bundle.

10. The photovoltaic inverter according to claim 9, characterized in that: The fifth connecting cable group includes a first cable segment group, a second cable segment group and a third cable segment group connected in sequence, The first cable segment group connected to the first output port group extends from the first output port group in a direction away from the fourth port group. The second cable segment group is adjacent to the wall surface of the first box body wall and extends along the second direction and is fixed to the first box body wall. The third cable segment group and the eighth connecting cable group are bound to form the second bundle. The sixth connection cable group, the seventh connection cable group, and the eighth connection cable group extend from the third port group toward the fourth port group.

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