Polarity-separated lead structure and photovoltaic inverter

Abstract

The invention discloses a lead structure, and the structure comprises a first port group array which comprises a plurality of first port groups which are respectively arranged in a second direction and a third direction; wherein each first port group comprises two first ports which are adjacent in the second direction and have opposite polarities, the polarities of the two first ports which are adjacent in the second direction and belong to different first port groups are the same, the polarities of the first ports arranged in the third direction are the same, and the first direction, the second direction and the third direction are perpendicular to each other; a plurality of second port groups are formed in the second direction of the change-over switch device, and the polarity of each second port in each second port group is the same as the polarity of each first port, corresponding to the second port group in the third direction, in the first port group array; the plurality of first cable groups are used for connecting the first ports and the second ports which correspond to each other along the third direction; in the second direction, the distance between the adjacent first cable groups with the same polarity is smaller than the distance between the adjacent first cable groups with the opposite polarity.

Description

Technical Field

[0001] The present application relates to the technical field of inverters, and in particular to a polarity-separated lead structure and 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, not only replacing some conventional energy, but also becoming the main body of the world's energy supply.

[0003] Photovoltaic inverter is one of the important equipments in photovoltaic power generation system. Photovoltaic inverter is connected to multiple photovoltaic modules through photovoltaic connector, and then the power of multiple photovoltaic modules is introduced into the circuit board with conversion function through the internal lead structure. However, the applicant found that the lead structure has short circuit. When the voltage level of photovoltaic inverter is high, DC arcing phenomenon is easy to occur, which may seriously damage photovoltaic inverter. Therefore, how to reduce the short circuit probability of lead structure has become one of the research topics in the industry. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a lead structure with polarity separation and a photovoltaic inverter, thereby reducing the short circuit probability of the lead structure, reducing the probability of DC arcing, and thus avoiding damage to the inverter.

[0005] This application is implemented through the following technical solutions.

[0006] The first aspect of the present application provides a polarity-separated lead structure, which is applied to an electrical device; the electrical device comprises a box with a accommodating space, the box having a first box wall perpendicular to a first direction; the lead structure comprises: a first port group array, arranged on the first box wall, the first port group array comprises a plurality of first port groups arranged respectively along a second direction and a third direction; wherein each first port group comprises two first ports adjacent to each other in the second direction and having opposite polarities, two first ports adjacent to each other in the second direction and belonging to different first port groups have the same polarity, the first ports arranged along the third direction have the same polarity, and the first direction, the second direction and the third direction are perpendicular to each other; a switching device, located The accommodating space, the conversion 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, the polarity of each second port in each second port group is 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 a plurality of first cable groups are located in the accommodating space, each of the first cable groups includes a plurality of first cables extending along the third direction, the first cables are used to connect the first port and the second port 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 smaller than the distance between adjacent first cable groups with opposite polarity.

[0007] Therefore, the electrical connection between the first port group and the second port group can be achieved, and then the electrical connection between the first port group array and the conversion switch device can be achieved. In addition, since the polarities of the two first ports that are adjacent along the second direction and belong to different first port groups are the same, the creepage distance between the first ports with opposite polarities is increased, and the short circuit probability between the first ports with opposite polarities is reduced; and since the distance between the adjacent first cable groups with the same polarity is smaller than the distance between the 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 then reducing the short circuit probability of the lead structure, which is particularly applicable when the size of the box in the second direction is limited.

[0008] 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 side of the conversion switch device that is perpendicular to the third direction and close to the first port group array, the second port group includes 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 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 connects the first port of the first port row and each second port of the first input port group, the second connecting cable group connects the first port of the second port row and each second port of the second input port group, the third connecting cable group connects the first port of the third port row and each second port of the third input port group, and the fourth connecting cable group connects the first port of the fourth port row and each second port of the fourth input port group.

[0009] In this way, the first port can be electrically connected to the second port, thereby electrically connecting the first port group array to the conversion switch device, and since the second port group is located on a side of the conversion switch device that is perpendicular to the third direction and close to the first port group array, the first cable group can be extended along the second direction to achieve electrical connection between the first port and the conversion switch device, shortening the extension path of the first cable group, which is beneficial to saving materials, reducing costs, and also conducive to the neatness of the wiring layout.

[0010] In some embodiments, the lead structure also includes a first wire fixing device, which is provided with a plurality of fixing holes spaced apart from each other along the second direction, and 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 wiring harness, 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 wiring harness.

[0011] Since the second connecting cable group and the third connecting cable group are bundled into the first bundle by the first wire tie, the creepage distance between the first cable groups of different polarities can be further increased, thereby further reducing the probability of short circuit between the first cable groups of different polarities, and further reducing the probability of short circuit of the lead structure. In addition, since the first connecting cable group, the first bundle, and the fourth connecting cable group are fixed to the first wire fixing device at intervals along the second direction, the distance between the first connecting cable group, the first bundle, and the fourth connecting cable group along the second direction can be fixed and not easily affected by external vibrations, thereby reducing the probability of short circuit between the first connecting cable group, the first bundle, and the fourth connecting cable group, and further reducing the probability of short circuit of the lead structure.

[0012] In some embodiments, a third port group is formed on the other side of the conversion switch device perpendicular to the third direction, and each third port in the third port group has the same polarity as each second port in the second port group corresponding to the third direction, and the third port 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 from each other along the second direction; the electrical device also includes a first functional board perpendicular to the second direction, the first functional board is located in the accommodating space, and the first functional board has a fourth port group, and the fourth port group includes a first output port group with the same polarity as the first output port group an access 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 lead structure also includes multiple groups of second cable groups, the second cable groups are located in the accommodating space, and the second cable groups include 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.

[0013] Thereby, the electrical connection between the third port group and the fourth port group can be achieved, and then the electrical connection between the switching device and the first functional board can be achieved.

[0014] In some embodiments, the conversion switch device is located near one end of the first functional board along the third direction, and near one end of the first functional board along the first direction close to the first box wall, the fourth port group is arranged on the first functional board, the fourth port group is located on the side of the conversion switch device away from the first box wall, and close to the first end of the first functional board along the third direction close to the conversion switch device, the fifth connecting cable group, the sixth connecting cable group, the seventh connecting cable group and the eighth connecting cable group extend along the first direction and are arranged at intervals along the second direction.

[0015] Therefore, the first cable group can be extended along the first direction to realize the electrical connection between the third port group and the fourth port group, shortening the extension path of the fifth connecting cable group, the sixth connecting cable group, the seventh connecting cable group and the eighth connecting cable group, which is beneficial to saving materials, reducing costs, and also conducive to the neatness of the wiring layout.

[0016] In some embodiments, the electrical equipment also includes a second function board, which is located in the accommodating space, the second function board is perpendicular to the second direction and is arranged with the first function board at intervals along the second direction, the second function board and the first function board are located on the same side of the conversion switch device along the first direction, and the second function board and the first function board are 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 first function board and the second function board, the fifth connecting cable group and the eighth connecting cable group are bound into a second bundle by the second wiring member, the sixth connecting cable group and the seventh connecting cable group are bound into a third bundle by the third wiring member, and along the second direction, the second bundle is arranged with intervals from the third bundle.

[0017] Since the fifth connecting cable group and the eighth connecting cable group are bound into a second bundle by the second wiring tie, and the sixth connecting cable group and the seventh connecting cable group are bound into a third bundle by the third wiring tie, the second bundle is arranged spaced apart from the third bundle along the second direction. Therefore, when the lead space is constrained by the first functional board and the second functional board, the distance between the second cable groups of different polarities along the second direction can be increased within the space formed between the first functional board and the second functional board, thereby reducing the probability of short circuit between the second cable groups of different polarities, and further reducing the probability of short circuit of the lead structure.

[0018] In some embodiments, the lead structure further includes a second fixing device, and along the second direction, the second bundle and the third bundle are respectively fixed to the second fixing device at intervals through a second wire binding member.

[0019] Thereby, the distance between the second bundle and the third bundle along the second direction is fixed, so the distance between the second bundle and the third bundle along the second direction is not easily affected by external vibrations, thereby reducing the probability of short circuit between the second bundle and the third bundle, and further reducing the probability of short circuit of the lead structure.

[0020] In some embodiments, the conversion switch device is located near one end of the first functional board along the third direction, and is located near one end of the first functional board along the first direction close to the first box wall, the fourth port group is arranged on the first functional board, the fourth port group is located on the side of the conversion switch device away from the first box wall, and is close to the first end of the first functional 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 first functional board than the third bundle.

[0021] Since the conversion switch device is located between one end of the first functional board and the first box wall, it is beneficial for the first cable group to extend close to the first box wall, which is beneficial for setting other structural parts such as power devices in the box, thereby improving the space utilization rate in the box; and since the conversion switch device and the fourth port group are located near the first end of the first functional 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 for shortening the extension path of the second cable group, saving materials, and setting other structural parts 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 first functional 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 first functional board along the third direction, and the second access port group and the third access port group with opposite polarity to the first access port group and the fourth access port group are relatively farther away from the edge of the first functional board along the third direction. Therefore, near the place where the second cable group connects to the fourth port group, the crossing between the second bundle and the third bundle can be further avoided, thereby reducing the short circuit probability of the second bundle and the third bundle, and thereby reducing the short circuit probability of the lead structure.

[0022] In some embodiments, 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 wall and extends along the second direction and is fixed to the first box wall, the third cable segment group is bound with the eighth connecting cable group to form the second bundle, and the sixth connecting cable group, the seventh connecting cable group, and the eighth connecting cable group extend from the third port group in a direction close to the fourth port group.

[0023] Thus, near the third port group, the extension directions of the second cable groups with opposite polarities are opposite, and the fifth connecting cable group can avoid the sixth connecting cable group and the seventh connecting cable group, and be bound with the eighth connecting cable group into a second bundle, 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. In addition, since the sixth connecting cable group and the seventh connecting cable group have the same polarity, there is no need to deliberately move the sixth connecting cable group away from the seventh connecting cable group in the second direction, thereby reducing the probability of overlapping short circuits between the sixth connecting cable group and the fifth connecting cable group near the third port group; further, since the fifth connecting cable group and the eighth connecting cable group have the same polarity, and the sixth connecting cable group and the seventh connecting cable group have the same polarity, when configuring or adjusting the spacing between the second bundle and the third bundle in the second direction, the fifth connecting cable group and the sixth connecting cable group will not produce obvious follow-up, and the configuration or adjustment of the bundle spacing is easier.

[0024] The second aspect of the present application provides a photovoltaic inverter, which includes a photovoltaic connector array for connecting photovoltaic components, an AC-DC converter and the above-mentioned lead structure; the AC-DC converter includes a first functional board, the photovoltaic connector array is fixed to the first box wall and forms the first port group array, and is electrically connected to the first functional board through the lead structure.

[0025] This can increase the creepage distance between cable groups of different polarities in the lead structure of the photovoltaic inverter, reduce the probability of short circuits between cable groups of different polarities, thereby reducing the probability of short circuits in the photovoltaic inverter, and further reducing the probability of DC arcing in the photovoltaic inverter.

[0026] The beneficial effects of the present application include: being able to reduce the probability of short circuit and DC arcing of the lead structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are only used for the purpose of illustrating preferred embodiments and are not to be considered as limiting the present application. In addition, the same reference numerals are used to represent the same components throughout the drawings. In the drawings:

[0028] Figure 1 A schematic diagram of the structure of a photovoltaic inverter provided for some embodiments of the present application;

[0029] Figure 2 for Figure 1 A local enlarged schematic diagram of region A;

[0030] Figure 3 A schematic structural diagram of a photovoltaic inverter from another angle provided for some embodiments of the present application;

[0031] Figure 4 for Figure 3 A local enlarged schematic diagram of area B;

[0032] Figure 5 for Figure 3 A local enlarged schematic diagram of the C region;

[0033] Figure 6 A schematic structural diagram of a photovoltaic inverter from another angle provided for some embodiments of the present application;

[0034] Figure 7 for Figure 6 A local enlarged schematic diagram of the D area.

[0035] Description of Reference Numerals

[0036] 1 electrical device; 11 box; 111 accommodation space; 112 first box wall; 12 first functional 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; 211 first port group; 21111 first port; 2111 first port row 2111; 2112 second port row 2112; 2113 third port row 2113; 2114 fourth port row 2114; 22 conversion 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 end 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 connecting cable group; 232 second connecting cable group; 233 third connecting cable group; 234 fourth connecting cable group; 24 first fixing device; 241 fixing hole; 251 first bundle; 252 second bundle; 253 third bundle; 254 second fixing device; 26 second cable group; 261 fifth connecting cable group; 2611 first cable segment group; 2612 second cable segment group; 2613 third cable segment group; 262 sixth connecting cable group; 263 seventh connecting cable group; 264 eighth connecting cable group; X first direction; Y second direction; Z third direction. DETAILED DESCRIPTION

[0037] The following embodiments of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and cannot be used to limit the protection scope of the present application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0039] In the description of the embodiments of the present application, technical terms "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 number, specific order or primary and secondary relationships of the indicated technical features.

[0040] Reference to "embodiment" herein means that a particular feature, structure or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "up", "down", "left", "right", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of the present application. Therefore, they cannot be understood as limitations on the embodiments of the present application.

[0042] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "connection" and "fixation" should be understood in a broad sense and may refer to mechanical connection or electrical connection; it may refer to the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical terms "parallel" and "perpendicular" are both allowed to have a certain degree of tolerance and / or error, including the situations of being approximately parallel and approximately perpendicular.

[0044] Below, the embodiments of the present application are described in detail.

[0045] 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, not only replacing some conventional energy, but also becoming the main body of the world's energy supply.

[0046] Photovoltaic inverter is one of the important equipments in photovoltaic power generation system. Photovoltaic inverter is connected to multiple photovoltaic modules through photovoltaic connector, and then the power of multiple photovoltaic modules is introduced into the circuit board with conversion function through the internal lead structure. However, the applicant found that the lead structure has short circuit. When the voltage level of photovoltaic inverter is high, DC arcing phenomenon is easy to occur, which may seriously damage photovoltaic inverter. Therefore, how to reduce the short circuit probability of lead structure has become one of the research topics in the industry.

[0047] In the prior art, the polarities of two first ports belonging to different first port groups in the first port group array are opposite and adjacent. According to research, the layout of the above-mentioned first port group array may cause DC arcing failure, thereby causing inverter failure. According to analysis, during the routing of internal cables, there is a cross routing between cables of different polarities in the lead structure, so the creepage distance between cables of different polarities is close, and the probability of short circuit is high. And because the internal temperature of the electrical equipment is high, when the electrical equipment is in long-term operation, the wire temperature of the cable is high, which will soften the insulating material wrapping the wire. When the two ends of the cable are fixed along the length direction of the cable, the cable may tilt in a direction intersecting the length direction of the cable, so cables of different polarities may overlap, resulting in a cable short circuit, thereby damaging the lead structure. In addition, the cable is usually fixed by a cable tie. The teeth in the cable tie may cause the insulation sheath of the cable to be damaged at the position where the cable tie is fixed, thereby thinning the thickness of the insulation sheath, thereby weakening the insulation strength of the cable. If cables of different polarities cross or overlap at this time, it is possible that the cables of different polarities are short-circuited, thereby causing DC arcing. Considering that the size of the box of the electrical equipment is limited and there are many cable fixing points in the box, it is difficult to find a large space in the box to set multiple cable fixing points that keep cables of different polarities away from each other, and the actual operation is difficult. Moreover, in the layout of the first port group array in the prior art, even if the distance between the cables connected to the two first ports of the same first port group is adjusted, the distance between the cables connected to the adjacent first ports of different polarities belonging to different first port groups will be shortened, and the lead structure will be easily short-circuited, thereby causing the cables of different polarities to have straight arcing.

[0048] In order to reduce the space occupied by the lead structure and increase the creepage distance between cables of different polarities, cables with the same polarity can be arranged adjacent to each other, and adjacent cables with the same polarity can be arranged close to each other. This can also increase the distance between cables with opposite polarities, thereby reducing the probability of short circuits between cables of different polarities in the lead structure, and further reducing the probability of short circuits in the lead structure.

[0049] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a lead structure, which is applied to an electrical device; the electrical device includes a box with a accommodating space, the box having a first box wall perpendicular to a first direction; the lead structure includes: a first port group array, arranged on the first box wall, the first port group array includes a plurality of first port groups arranged along a second direction and a third direction respectively; wherein each first port group includes two first ports adjacent to each other in the second direction and having opposite polarities, two first ports adjacent to each other in the second direction and belonging to different first port groups have the same polarity, the first ports arranged along the third direction have the same polarity, and the first direction, the second direction and the third direction are perpendicular to each other; a conversion switch A switching device is located in the accommodating space, the switching 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, the polarity of each second port in each second port group is the same as the polarity of each first port in the first port group array corresponding to the second port group along the third direction; and a plurality of first cable groups are located in the accommodating space, each first cable group includes a plurality of first cables extending along the third direction, the first cable is used to connect the first port and the second port 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 smaller than the distance between adjacent first cable groups with opposite polarity.

[0050] Therefore, the electrical connection between the first port group and the second port group can be achieved, and then the electrical connection between the first port group array and the conversion switch device can be achieved. In addition, since the polarities of the two first ports adjacent to each other in the second direction and belonging to different first port groups are the same, the creepage distance between the first ports with opposite polarities is increased, and the short circuit probability between the first ports with opposite polarities is reduced; and since the distance between the adjacent first cable groups with the same polarity is smaller than the distance between the 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 then reducing the short circuit probability of the polar line structure.

[0051] The lead structure of the embodiment of the present application can be applied to various electrical devices using lead structures, such as photovoltaic inverters and energy storage converters.

[0052] The photovoltaic inverter of the embodiment of the present application can be applied to a centralized inverter, a string inverter, or a distributed inverter. Of course, it is mainly applicable to a string inverter with a smaller machine size.

[0053] Below, refer to Figures 1 to 7 Some embodiments of the present application are described in detail.

[0054] Figure 1 A schematic diagram of the structure of a photovoltaic inverter provided for some embodiments of the present application; Figure 2for Figure 1 A local enlarged schematic diagram of region A; Figure 3 A schematic structural diagram of a photovoltaic inverter from another angle provided for some embodiments of the present application; Figure 4 for Figure 3 A local enlarged schematic diagram of area B; Figure 5 for Figure 3 A local enlarged schematic diagram of the C region; Figure 6 A schematic structural diagram of a photovoltaic inverter from another angle provided for some embodiments of the present application; Figure 7 for Figure 6 A local enlarged schematic diagram of the D area.

[0055] In the description of the embodiments of the present disclosure, for the convenience of explanation, the direction of arrow X represents the “first direction”, the direction of arrow Y represents the “second direction”, and the direction of arrow Z represents the “third direction”.

[0056] like Figures 1 to 5 As shown, the first aspect of the present application provides a polarity-separated lead structure 2, which is applied to an electrical device 1; the electrical device 1 includes a box 11 with a accommodating space 111, and the box 11 has a first box wall 112 perpendicular to the first direction X; the lead structure 2 includes: a first port group array 21, which is arranged on the first box wall 112, and the first port group array 21 includes a plurality of first port groups 211 arranged along the second direction Y and the third direction Z respectively; wherein each first port group 211 includes two first ports 21111 adjacent to each other along the second direction Y and having opposite polarities, two first ports 21111 adjacent to each other along the second direction Y and belonging to different first port groups 211 have the same polarity, and each first port 21111 arranged along the third direction Z has the same polarity, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other; a conversion switch device 22, Located in the accommodating space 111, the conversion 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 polarity of each second port 22111 in each second port group 221 is the same as the polarity of each first port 21111 corresponding to the second port group 221 in the first port group array 21 along the third direction Z; and a plurality of first cable groups 23 are located in the accommodating space 111, each first cable group 23 includes a plurality of first cables 2311 extending along the third direction Z, the first cable 2311 is used to connect the first port 21111 and the second port 22111 corresponding to 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.

[0057] In some embodiments, the lead structure 2 is applied to an electrical device 1 , and the electrical device 1 may be a photovoltaic inverter or an energy storage converter, or may be other electrical devices.

[0058] In the present application, the lead structure 2 refers to a plurality of cables and electrical components connected by the cables, as well as components for fixing the positions of the cables.

[0059] like Figure 1 As shown, the electrical device 1 includes a box body 11 having a receiving space 111 , and the box body 11 has a first box body wall 112 perpendicular to the first direction X.

[0060] Optionally, the box body 11 may be in the shape of a rectangle, a polygonal column or other irregular shapes.

[0061] Optionally, the first box wall 112 may be a bottom wall, a top wall or a side wall, etc. In a specific embodiment, the box 11 is hung on a wall, and the first box wall is the bottom wall of the box. The box may be made of insulating material.

[0062] In some embodiments, Figure 3 As shown, the lead structure 2 includes a first port group array 21 and a conversion switch device 22, and the first port group array 21 and the conversion switch device 22 are electrically connected through a first cable group 23. In a specific embodiment, the first port group array 21 is electrically connected to a photovoltaic panel (not shown), and the photovoltaic panel (PV) converts solar energy into electrical energy to generate an electrical signal, which is transmitted to the first port group array 21 through a cable, and the electrical signal is then transmitted to the conversion switch device 22 through the first cable group 23. Further, the electrical signal is a direct current signal.

[0063] In some embodiments, Figure 1 and Figure 3 As shown, the first port group array 21 is arranged 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 roughly arranged in the middle position of the first box wall 112. In another specific embodiment, the lead structure 2 also includes a sampling plate, which is parallel to the first box wall 112 and is arranged close to the first box wall 112, the first port group array 21 passes through the first box wall 112 and is electrically connected to the sampling plate, and the first cable group 23 is electrically connected to the first port group array 21 through the sampling plate.

[0064] In some embodiments, Figure 1 and Figure 2As 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 a first port group array 21. The number of first port groups 211 arranged along the second direction Y may be two, three, four or more, etc. In a specific embodiment, the number of first port groups 211 arranged along the second direction Y may be two; the number of first port groups 211 arranged along the third direction Z may be two, three, four or more, etc., wherein the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0065] In some embodiments, Figure 2 As shown, each first port group 211 includes two first ports 21111 arranged at intervals along the second direction Y, wherein the two first ports 21111 are adjacent and have opposite polarities, for example, one first port 21111 is positive and the other first port 21111 is negative.

[0066] In the first port group array 21, two first ports 21111 adjacent to each other along the second direction Y and belonging to different first port groups 211 have the same polarity. Figure 2 The shown orientation is used as an example, that is, along the second direction Y, the polarity carried by the first port 21111 can be positive polarity, negative polarity, negative polarity, positive polarity, positive polarity, negative polarity, negative polarity, positive polarity, etc.; of course, along the second direction Y, the polarity carried by the first port 21111 can also be negative polarity, positive polarity, positive polarity, negative polarity, negative polarity, positive polarity, positive polarity, negative polarity, etc.

[0067] In a specific embodiment, Figure 2 As shown, along the second direction Y, the polarities of the first ports 21111 located at the two ends are the same, and the polarities of the two middle first ports 21111 are the same.

[0068] In some embodiments, Figure 2 As shown, the first ports 21111 are arranged at intervals along the second direction Y, and the distances between the first ports along the second direction Y may be equal or unequal. Of course, the distance between adjacent first ports with the same polarity may be smaller than the distance between adjacent first ports with opposite polarities.

[0069] In some embodiments, the first ports 21111 arranged along the third direction Z have the same polarity, for example, both can be positive or negative, and the third direction Z is perpendicular to the first direction X and the second direction Y.

[0070] In some embodiments, Figures 3 to 5As shown, the switching device 22 is located in the accommodation space 111, and 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 Of course, there may 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 in the figure), wherein a part of the first port 21111 in the first port group array 21 is electrically connected to one of the conversion switch devices 22, and another part is electrically connected to another conversion switch device 22. Of course, the conversion switch devices 22 can also be 3 or more.

[0071] like Figure 2 , Figure 3 and Figure 5 As shown, the conversion switch device 22 has a plurality of second port groups 221 spaced apart from each other along the second direction Y. The conversion switch device 22 also has a plurality of second port groups 221 spaced apart from each other along the first direction Y. Each second port group 221 includes two second ports 22111 spaced apart from each other along the second direction Y. Along the second direction Y, the polarity of each second port 22111 is the same as the polarity of the corresponding first port 21111 along the third direction Z.

[0072] like Figure 3 and Figure 4 As shown, multiple groups of first cable groups 23 are located in the accommodating space 111, and each first cable group 23 includes multiple first cables 2311 extending generally along the third direction Z, and the first cables 2311 are used to connect the first port 21111 and the second port 22111 corresponding to the third direction Z; wherein, the first cable 2311 extending along the third direction Z means that the overall direction of the first cable 2311 is extending along the third direction Z. Of course, some structures in the first cable 2311 can extend along the first direction X, for example, the part of the first cable 2311 connected to the first port can extend along the first direction X.

[0073] In a specific embodiment, Figures 1 to 5 As shown, there may be 30 first port groups 211 , and the 30 first port groups 211 are electrically connected to the sampling board. The sampling board has 15 output ports, and the 15 output ports are electrically connected to the three conversion switch devices 22 , respectively.

[0074] In some embodiments, Figure 4As shown, along the second direction Y, the distance D between adjacent first cable groups 23 with the same polarity is smaller than the distance L between adjacent first cable groups 23 with opposite polarity. That is, the distance D between the second connection cable group 232 and the third connection cable group 233 is smaller 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 bundled together by a first binding member (not shown). The first binding member can be a cable tie or a cable tie.

[0075] The outer surface of the first cable 2311 is wrapped with insulating material, such as insulating rubber.

[0076] Therefore, the electrical connection between the first port group 211 and the second port group 221 can be achieved, and then the electrical connection between the first port group array 21 and the conversion switch device 22 can be achieved. In addition, since the polarities of the 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 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 the adjacent first cable groups 23 with the same polarity is smaller than the distance L between the 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 then reducing the short circuit probability of the lead structure 2.

[0077] In some embodiments, Figures 1 to 5 As shown, the first port group array 21 includes a first port group array 21 extending from the first side to the second side (eg Figure 2 The first port row 2111, the second port row 2112, the third port row 2113 and the fourth port row 2114 are arranged in sequence (from top to bottom as shown in the figure), and the second port group 221 is located on a side of the conversion switch device 22 that is perpendicular to the third direction Z and close to the first port group array 21 (for example Figure 3 and Figure 5 The second port group 221 includes a second port group 221 extending from the first side to the second side along the second direction Y (eg Figure 3 and Figure 5 The direction from right to left is shown, i.e. Figure 2The first input port group 2211, the second input port group 2212, the third input port group 2213 and the fourth input port group 2214 are arranged in sequence (from top to bottom as shown), the first cable group 23 includes a first connecting cable group 231, a second connecting cable group 232, a third connecting cable group 233 and a fourth connecting cable group 234 extending along the third direction Z and arranged at intervals along the second direction Y, the first connecting cable group 231 connects the first port of the first port row 2111 and each second port of the first input port group 2211, the second connecting cable group 232 connects the first port of the second port row 2112 and each second port of the second input port group 2212, the third connecting cable group 233 connects the first port of the third port row 2113 and each second port of the third input port group 2213, and the fourth connecting cable group 234 connects the first port of the fourth port row 2114 and each second port of the fourth input port group 2214.

[0078] In the embodiments of the present application, for the convenience of description, the first port groups 211 arranged along the second direction Y are taken as two groups for illustration, and those skilled in the art may expand the arrangement to three, four or five groups of the first port groups 211 arranged along the second direction Y as needed.

[0079] like Figures 2 to 5 As 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 include a plurality of first cables 2311 , and the first cables 2311 are used to electrically connect the first port 21111 with the second port 22111 .

[0080] In this way, the first port 21111 can be electrically connected to the second port 22111, thereby electrically connecting the first port group array 21 to the conversion switch device 22. Moreover, since the second port group 221 is located on a side of the conversion switch device that is perpendicular to the third direction Z and close to the first port group array, the first cable group 23 can be extended along the second direction Y to achieve electrical connection between the first port and the conversion switch device, thereby shortening the extension path of the first cable group, which is beneficial to saving materials and facilitating the neatness of the wiring layout.

[0081] In some embodiments, Figure 3 and Figure 4As shown, the lead structure 2 also includes a first wire fixing device 24, which is provided with a plurality of fixing holes 241 spaced apart from each other along the second direction Y, and each fixing hole 241 is used to fix the first connecting cable group 231, the first bundle 251, and the fourth connecting cable group 234 respectively through a first wiring harness (not shown), so that the first connecting cable group 231, the first bundle 251 and the fourth connecting cable group 234 are spaced apart along the second direction Y, wherein the first bundle 251 is formed by the second connecting cable group 232 and the third connecting cable group 233 being bundled by a first wiring harness (not shown).

[0082] In some embodiments, Figure 4 As shown, the second connection cable group 232 and the third connection cable group 233 can be bundled into a first bundle 251 using a first binding member (not shown), and the first binding member (not shown) can be a cable tie or a cable tie.

[0083] In some embodiments, Figure 4 As shown, the first connecting cable set 231 , the first bundle 251 , and the fourth connecting cable set 234 may be fixed to the fixing hole 241 of the first fixing device 24 by using a first cable tie (not shown).

[0084] Optionally, the first wire fixing device 24 may have a plurality of fixing holes 241 spaced apart from each other in the second direction Y, and the number of the fixing holes 241 may be three, four, five or more, and the present application 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, thereby increasing the creepage distance between the first cable groups 23 of different polarities, thereby reducing the probability of short circuits between the first cable groups 23 of different polarities.

[0085] The present application does not specifically limit the shape of the first wire fixing device 24 . In a specific embodiment, the first wire fixing device 24 may be in the shape of a flat plate extending along the second direction Y.

[0086] In some embodiments, the first wire fixing device 24 may be fixed to a side wall connected to the first box wall 112 and perpendicular to the second direction Y. There may be multiple first wire fixing devices 24, and the multiple first wire fixing devices 24 may be arranged along the third direction Z at intervals.

[0087] Since the second connection cable group 232 and the third connection cable group 233 are bundled into the first bundle 251 by the first wire tie, the creepage distance between the first cable groups 23 of different polarities can be further increased, thereby further reducing the probability of short circuit between the first cable groups 23 of different polarities, and further reducing the probability of short circuit 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 fixed to the first wire fixing device 24 at intervals along the second direction Y, 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 not easily affected by external vibrations, thereby reducing the probability of short circuit between the first connection cable group 231, the first bundle 251, and the fourth connection cable group 234, and further reducing the probability of short circuit of the lead structure 2.

[0088] In some embodiments, Figures 5 to 7 As shown, the other side of the switching device 22 perpendicular to the third direction Z (eg Figure 6 The third port group 222 is formed below the third port group 222, and each third port 22211 in the third port group 222 has the same polarity as each second port 22111 corresponding to the second port group 221 along the third direction Z. The third port group 222 includes a plurality of ports extending from the first side to the second side (e.g. Figure 7 From top to bottom, that is Figure 3 and Figure 5 The lead structure further comprises a first output port group 2221, a second output port group 2222, a third output port group 2223 and a fourth output port group 2224 which are arranged in sequence along the second direction Y and spaced from each other; the lead structure further comprises a first functional board 12 and a second cable group 26 which are perpendicular to the second direction Y, the first functional board 12 is located in the accommodating space 111, the first functional board 12 has a fourth port group 121, the fourth port group 121 comprises 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, and a third output port group 22 23 a third access port group 1213 with the same polarity and a fourth access port group 1214 with the same polarity as the fourth output port group 2224; the second cable group 26 is located in the accommodating space 111, and the second cable group 26 includes a fifth connecting cable group 261 connecting the first output port group 2221 and the first access port group 1211, a sixth connecting cable group 262 connecting the second output port group 2222 and the second access port group 1212, a seventh connecting cable group 263 connecting the third output port group 2223 and the third access port group 1213, and an eighth connecting cable group 264 connecting the fourth output port group 2224 and the fourth access port group 1214.

[0089] In some embodiments, Figure 3 As shown, the conversion switch device 22 is arranged at an interval from the first functional board 12 , and the first wire fixing device 24 is arranged at an interval from the first functional board 12 .

[0090] In some embodiments, Figure 7 As shown, a third port group 222 is provided on the other surface of the conversion switch device 22 perpendicular to the third direction Z, and a fourth port group 121 is provided on the first functional board 12. The third port group 222 and the fourth port group 121 are electrically connected through the second cable group 26, that is, the DC signal transmitted to the conversion switch device 22 is transmitted to the first functional board 12 through the second cable group 26. In a specific embodiment, the first functional board 12 can be a power amplifier board (MPPT), which can convert a direct current (DC) electrical signal into an alternating current (AC) electrical signal.

[0091] In some embodiments, the conversion switch device 22 has a switch button, and the switch button is used to control the on and off of the direct current (DC) current in the lead structure 2.

[0092] In some embodiments, Figure 7 As shown, the polarity 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 is the same, and the polarity 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 is the same. The polarity of the first output port group 2221 and the second output port group 2222 is opposite.

[0093] In some embodiments, outer surfaces of the second cables in the second cable group 26 are wrapped with insulating material, such as insulating rubber.

[0094] In this way, the third port group 222 and the fourth port group 121 can be electrically connected, and then the conversion switch device 22 and the first functional board 12 can be electrically connected. When applied to a photovoltaic inverter, the power of multiple photovoltaic components (PV panels) can be connected to an amplifier board with an MPPT function, thereby realizing MPPT (maximum power point tracking) of multiple photovoltaic inputs.

[0095] In some embodiments, Figure 6As shown, the conversion switch device 22 is located near one end of the first functional board 12 along the third direction Z, and is located near one end of the first functional board 12 along the first direction X close to the first box wall 112, the fourth port group 121 is arranged on the first functional board 12, 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 first functional board 12 along the third direction Z close to the conversion switch device 22, the fifth connecting cable group 261, the sixth connecting cable group 262, the seventh connecting cable group 263 and the eighth connecting cable group 264 extend along the first direction X and are arranged at intervals along the second direction Y.

[0096] In some embodiments, Figure 6 As shown, the switching device 22 is located at one end of the first functional board 12 along the third direction Z (eg Figure 6 The switching device 22 is also located at an end of the first functional board 12 along the first direction X close to the first box wall 112 (for example Figure 6 Near the left end portion shown in the figure, the switching device 22 is spaced apart from the first functional board 12.

[0097] In some embodiments, in the third direction Z, the fourth port group 121 has a first end 122 (eg, Figure 6 The fourth port group 121 is disposed on the first functional board 12 at a position close to the first end 122. The first end 122 refers to an end of the first functional board 12 closer to the third port group along the third direction.

[0098] In some embodiments, Figure 6 and Figure 7 As shown, the fifth connecting cable group 261, the sixth connecting cable group 262, the seventh connecting cable group 263 and the eighth connecting cable group 264 all extend substantially along the first direction X. That is, the main extension direction of the fifth connecting cable group 261, the sixth connecting cable group 262, the seventh connecting cable group 263 and the eighth connecting cable group 264 is the first direction X. Of course, the first cable portions of the fifth connecting cable group 261, the sixth connecting cable group 262, the seventh connecting cable group 263 and the eighth connecting cable group 264 may also extend along the third direction Z. For example, the portion of the second cable group 26 connected to the conversion switch device 22 may extend along the third direction Z.

[0099] Therefore, the first cable group 23 can be extended roughly along the first direction X to realize the electrical connection between the third port group 222 and the fourth port group 121, shortening the extension paths of the fifth connecting cable group 261, the sixth connecting cable group 262, the seventh connecting cable group 263 and the eighth connecting cable group 264, which is beneficial to saving materials, reducing costs, and also conducive to the neatness of the wiring layout.

[0100] In some embodiments, Figure 6 and Figure 7 As shown, the electrical device further includes a second functional board (not shown), the second functional board (not shown) is located in the accommodating space 111, the second functional board (not shown) is perpendicular to the second direction Y and is spaced apart from the first functional board 12 along the second direction Y, the second functional board (not shown) and the first functional board 12 are located on the same side of the conversion switch device 22 along the first direction X (for example Figure 6 The second function board (not shown) and the first function board 12 are located on the same side of the switching device 22 along the third direction Z (for example Figure 6 The upper side shown in the figure), along the second direction Y, the second cable group 26 is located between the first functional board 12 and the second functional board, the fifth connecting cable group 261 and the eighth connecting cable group 264 are bound into a second bundle 252 by a second wiring harness (not shown), the sixth connecting cable group 262 and the seventh connecting cable group 263 are bound into a third bundle 253 by a third wiring harness (not shown), and along the second direction Y, the second bundle 252 and the third bundle 253 are arranged at intervals.

[0101] In some embodiments, Figure 6 As shown, other parts of the electrical device are arranged on the second functional board (not shown). The second functional board can be a main control board, an auxiliary power board, a DC filter board, an AC filter board or a combination thereof of a photovoltaic inverter. The second functional board (not shown) and the first functional board 12 are arranged at intervals along the second direction Y, and the second functional board (not shown) and the first functional board 12 are substantially parallel.

[0102] Optionally, the second wire tie member (not shown) may be a wire tie or a cable tie. The third wire tie member (not shown) may be a wire tie or a cable tie.

[0103] In some embodiments, Figure 7 As shown, the second bundle 252 and the third bundle 253 may 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 first functional board 12 than the third bundle 253 .

[0104] Since the fifth connecting cable group 261 and the eighth connecting cable group 264 are bound into the second bundle 252 by the second binding member (not shown), and the sixth connecting cable group 262 and the seventh connecting cable group 263 are bound into the third bundle 253 by the third binding member (not shown), the second bundle 252 and the third bundle 253 are arranged at intervals along the second direction Y. Therefore, when the lead space is constrained by the first functional board and the second functional board, in the space formed between the first functional board 12 and the second functional 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 probability of short circuit between the second cable groups 26 of different polarities, and further reducing the probability of short circuit of the lead structure 2.

[0105] In some embodiments, Figure 3 , Figure 6 and Figure 7 As 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 fixed to the second fixing device 254 at intervals by a second wire binding member (not shown).

[0106] Optionally, the second cable tie (not shown) may be a cable tie or a cable tie.

[0107] In some embodiments, Figure 3 and Figure 6 As shown, the second fixing device 254 is located in the accommodating space 111, and the second wiring harness (not shown) is fixed to the box wall (eg, Figure 3 The second fixing device 254 is arranged at intervals from the first functional board 12. The second fixing device 254 may be one or more, and a plurality of second fixing devices may be arranged at intervals along the first direction X.

[0108] In some embodiments, Figure 5 and Figure 7 As shown, along the second direction Y, the second fixing device 254 does not extend beyond the second functional board (not shown). The length of the second fixing device along the second direction Y is limited by the spacing between the first functional board and the second functional board along the second direction Y. The present application does not specifically limit the shape of the second fixing device, for example: the second fixing device 254 is a column extending along the second direction Y.

[0109] The present application 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.

[0110] Thereby, 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 and the third bundle along the second direction Y is not easily affected by external vibrations, thereby reducing the probability of short circuit between the second bundle and the third bundle, and further reducing the probability of short circuit of the lead structure 2.

[0111] In some embodiments, Figure 6 and Figure 7 As shown, the switching device 22 is located at one end of the first functional board 12 along the third direction Z (eg Figure 6 and is located near an end of the first functional board 12 along the first direction X close to the first box wall 112 (for example Figure 6 The fourth port group 121 is arranged on the first functional board 12, and the fourth port group 121 is located on the side of the switching device 22 away from the first box wall 112, and is close to the first functional board 12 along the third direction Z close to the first end 122 of the switching device 22. 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 first functional board 12 than the third bundle 253.

[0112] like Figure 7 As shown, along the second direction Y, the second bundle 252 is closer to the first functional 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 7 Taking the shown orientation 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 cable in the fifth connecting cable group 261, the second cable in the sixth connecting cable group 262, the second cable in the seventh connecting cable group 263, and the second cable in the eighth connecting cable group 264 are respectively connected to the corresponding fourth ports in the fourth port group 121, crossing between second cables of different polarities can be avoided, thereby reducing the probability of short circuit between second cables of different polarities.

[0113] Since the conversion switch device 22 is located between one end of the first functional board 12 and the first box wall 112, it is beneficial for the first cable group 23 to extend close to the first box wall 112, which is beneficial for setting other structural parts such as power devices in the box, thereby improving the space utilization rate in the box; and, since the conversion switch device 22 and the fourth port group 121 are located near the first end 122 of the first functional 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 conversion switch device 22 and the fourth port group 121, and it is beneficial to shorten the extension length of the second cable group 26, save materials, and set other structural parts such as power devices in the box, further improving the space utilization rate in the box. In addition, since 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, 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 first functional board 12 than the third bundle 253, in other words, the first access port group 1211 and the fourth access port group 1214 with the same polarity are closer to the first functional board 12 is arranged along the edge of the third direction Z, and the second access port group 1212 and the third access port group 1213, which have opposite polarities to the first access port group 1211 and the fourth access port group 1214, are relatively farther away from the edge of the first functional board along the third direction Z. Therefore, near the place where the second cable group 26 is connected to the fourth port group 121, the crossing between the second bundle 252 and the third bundle 253 can be further avoided, thereby reducing the short circuit probability of the second bundle 252 and the third bundle 253, and further reducing the short circuit probability of the lead structure.

[0114] In some embodiments, Figure 7 As shown, the fifth connecting cable group 261 includes a first cable segment group 2611, a second cable segment group 2612 and a third cable segment group 2613 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 wall 112 and extends along the second direction Y and is fixed to the first box wall 112, the third cable segment group 2613 and the eighth connecting cable group 264 are bound into a second bundle 252, and the sixth connecting cable group 262, the seventh connecting cable group 263 and the eighth connecting cable group 264 extend from the third port group 222 in a direction close to the fourth port group 121.

[0115] In some embodiments, Figure 7As 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 situation where the second cable groups 26 of different polarities cross each other and realizing the arrangement in which the second cable groups 26 of the same polarity are bundled into a bundle.

[0116] 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, thereby, the distance between the first cable segment group and the sixth connecting cable group along the second direction can be further increased, and the distance between the third cable segment group and the seventh connecting cable group along the second direction can be further increased, thereby further reducing the probability of short circuit between the first cable segment groups of different polarities.

[0117] Therefore, near the third port group, the extension directions of the second cable groups with opposite polarities are opposite, and the fifth connecting cable group 261 can avoid the sixth connecting cable group 262 and the seventh connecting cable group 263, and be bound with the eighth connecting cable group 264 to form a second bundle 252, thereby further avoiding the second cable groups with opposite polarities from approaching and crossing each other, reducing the probability of short circuit between the second cable groups with opposite polarities, and thereby reducing the short circuit probability of the lead structure 2. In addition, since the sixth connecting cable group 262 and the seventh connecting cable group 263 have the same polarity, there is no need to deliberately move the sixth connecting cable group 262 away from the seventh connecting cable group 263 in the second direction Y, thereby reducing the probability of overlapping and short-circuiting the sixth connecting cable group 262 and the fifth connecting cable group 261 near the third port group; further, since the fifth connecting cable group 261 and the eighth connecting cable group 264 have the same polarity, and the sixth connecting cable group 262 and the seventh connecting cable group 263 have the same polarity, when configuring or adjusting the spacing between the second bundle 252 and the third bundle 253 in the second direction Y, the fifth connecting cable group 261 and the sixth connecting cable group 262 will not produce obvious follow-up movement, and the configuration or adjustment of the bundle spacing will be easier. Furthermore, Figure 7Taking the orientation shown as an example, the sixth connection cable group 262 extends to the lower right, and the seventh connection cable group 263 extends to the upper right, thereby the two are gathered into the 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, thereby, near the third port group 222, the distance between the fifth connection cable group 261 and the sixth connection cable group 262 along the second direction Y can be increased, and the distance between the seventh connection cable group 263 and the eighth connection cable group 264 along the second direction Y can be increased. In this way, the probability of short circuit between the second cable groups with opposite polarities can be further reduced.

[0118] In some embodiments, Figure 7 As shown, multiple second fixing devices 254 are arranged at intervals along the first direction X, the fifth connecting cable group 261 has multiple second cables, the sixth connecting cable group 262 has multiple second cables, the seventh connecting cable group 263 has multiple second cables, and the eighth connecting cable group 264 has multiple second cables, and one end of each second fixing device 254 away from the first functional board 12 along the second direction Y supports at least one second cable in the sixth connecting cable group 262 and at least one second cable in the seventh connecting cable group 263, and one end of each second fixing device 254 close to the first functional board 12 along the second direction Y supports at least one second cable in the fifth connecting cable group 261 and at least one second cable in the eighth connecting cable group 264.

[0119] A second aspect of the present application provides a photovoltaic inverter, such as Figures 1 to 7 As shown, the photovoltaic inverter includes a photovoltaic connector array for connecting photovoltaic components, an AC-DC converter and a lead structure provided in the first aspect of the present application; the AC-DC converter has an inverter function and includes a first functional board 12 and a power switching device located on the first functional board, the photovoltaic connector array is fixed to the first box wall 112 and forms a first port group array 21, and is electrically connected to the first functional board 12 through the lead structure 2.

[0120] This can increase the creepage distance between the cable groups of different polarities in the lead structure 2 in the photovoltaic inverter, reduce the probability of short circuit between the cable groups of different polarities, thereby reducing the probability of short circuit in the photovoltaic inverter, and further reducing the probability of DC arcing in the photovoltaic inverter.

[0121] If there is no special description, all technical features and optional technical features of the present application can be combined with each other to form a new technical solution. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the present application.

Claims

1. A polarity-separated lead structure, applied to an electrical device; the electrical device comprises a box having a receiving space, the box having a first box wall perpendicular to a first direction; characterized in that: The lead structure comprises: A first port group array is arranged on the first box wall, the first port group array includes a plurality of first port groups arranged along a second direction and a third direction respectively; wherein each first port group includes two first ports adjacent to each other along the second direction and having opposite polarities, two first ports adjacent to each other along the second direction and belonging to different first port groups have the same polarity, the first ports arranged along the third direction have the same polarity, and the first direction, the second direction and the third direction are perpendicular to each other; a switching device, located in the accommodation space, the switching device being located on one side of the first port group array along the third direction, and forming a plurality of second port groups spaced apart from each other 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 A plurality of first cable groups are located in the accommodating space, each of the first cable groups includes a plurality of first cables extending along the third direction, and the first cables are used to connect the first port and the second port corresponding to 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.

2. The lead structure according to claim 1, 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 conversion 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 sequentially arranged 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 each second port of the first input port group, the second connecting cable group connecting the first port of the second port row and each second port of the second input port group, the third connecting cable group connecting the first port of the third port row and each second port of the third input port group, and the fourth connecting cable group connecting the first port of the fourth port row and each second port of the fourth input port group.

3. The lead structure according to claim 2, 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 bundling the second connecting cable group and the third connecting cable group by the first wire binding member.

4. The lead structure according to claim 3, characterized in that: A third port group is formed on the other side of the conversion switch device perpendicular to the third direction, each third port in the third port group has the same polarity as each second port in the second port group corresponding to 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 from each other along the second direction; The lead structure further includes a first functional board and a second cable group perpendicular to the second direction. The first function board is located in the accommodation space, and the first function 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 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.

5. The lead structure according to claim 4, characterized in that: The conversion switch device is located near one end of the first function board along the third direction, and is located near one end of the first function board along the first direction close to the first box wall. The fourth port group is arranged on the first function board, and the fourth port group is located on a side of the conversion switch device away from the first box wall, and is close to the first end of the first function board along the third direction close to the conversion switch device. The fifth connection cable group, the sixth connection cable group, the seventh connection cable group, and the eighth connection cable group extend along the first direction and are arranged at intervals along the second direction.

6. The lead structure according to claim 4, characterized in that: The electrical device further includes a second function board, the second function board is located in the accommodation space, the second function board is perpendicular to the second direction and is spaced apart from the first function board along the second direction, the second function board and the first function board are located on the same side of the conversion switch device along the first direction, and the second function board and the first function board are 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 first function board and the second function board, The fifth and eighth connection cable groups are bound into a second bundle by a second binding member, and the sixth and seventh connection cable groups are bound into a third bundle by a third binding member. The second bundle is spaced apart from the third bundle along the second direction.

7. The lead structure according to claim 6, characterized in that: The lead structure further includes a second fixing device, and along the second direction, the second bundle and the third bundle are respectively fixed to the second fixing device at intervals through a second wire binding member.

8. The lead structure according to claim 6, characterized in that: The conversion switch device is located near one end of the first function board along the third direction, and is located near one end of the first function board along the first direction close to the first box wall. The fourth port group is arranged on the first function board, and the fourth port group is located on a side of the conversion switch device away from the first box wall, and is close to the first end of the first function 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 first functional board than the third bundle.

9. The lead structure according to claim 8, 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 wall and extends along the second direction and is fixed to the first box wall, and the third cable segment group and the eighth connecting cable group are bound 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 toward the fourth port group.

10. A photovoltaic inverter, characterized in that: It comprises a photovoltaic connector array for connecting photovoltaic components, an AC-DC converter and a lead structure as described in any one of claims 4 to 9; the AC-DC converter comprises a first functional board, the photovoltaic connector array is fixed to the first box wall and forms the first port group array, and is electrically connected to the first functional board through the lead structure.

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