CN114337532A - Photovoltaic system and photovoltaic module junction box - Google Patents
Photovoltaic system and photovoltaic module junction box Download PDFInfo
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- CN114337532A CN114337532A CN202111612173.5A CN202111612173A CN114337532A CN 114337532 A CN114337532 A CN 114337532A CN 202111612173 A CN202111612173 A CN 202111612173A CN 114337532 A CN114337532 A CN 114337532A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a photovoltaic module junction box, which comprises: a box body; set up in at least a set of copper aluminium switching subassembly in the box body, every group copper aluminium switching subassembly includes copper base plate, at least one copper aluminium transition piece and an at least aluminium cable, the copper end of copper aluminium transition piece with connect through the diode electricity between the copper base plate, the one end of aluminium cable with the aluminium end electricity of copper aluminium transition piece is connected, just the other end of aluminium cable stretches out the box body. The structural design of the photovoltaic module junction box can be pre-assembled, on-site cutting and crimping are avoided, on-site construction strength and difficulty are reduced, and reliability is improved.
Description
Technical Field
The invention relates to the technical field of line switching, in particular to a photovoltaic system and a photovoltaic module junction box.
Background
In a photovoltaic system, all equipment interfaces are basically made of copper, and copper core cables are adopted for mutual connection. With the development of new energy technologies, lower electricity-consuming costs are pursued, and the industry is beginning to try to adopt aluminum cables to replace copper cables. 4mm in power station cable2Photovoltaic cables, direct current bus cables, alternating current sending cables, current collecting line cables and the like account for 40% of the total cost, and if aluminum wires are replaced, the cost ratio can be reduced to 20%, and the value is obvious.
In the prior artGenerally, a copper-aluminum transition connector is adopted, as shown in figure 1, the outgoing line of a photovoltaic module 01 is 4mm2And the copper cable 02 is connected with the aluminum cable 04 through the copper-aluminum transition connector 03 after outgoing. However, the connection of the two ends of the copper-aluminum transition connector 03 requires on-site cutting and crimping, which increases the working strength and difficulty of on-site construction. Aluminum wire is softer than copper line texture, and the sinle silk is easy to damage during manual processing, leads to the contact resistance big, easily burns out, and on-the-spot preparation in addition receives workman's experience and level restriction, and the quality is difficult to be controlled.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a photovoltaic module junction box, which has a structural design that can be preassembled, avoids on-site cutting and crimping, and reduces on-site construction strength and difficulty, and a second object of the present invention is to provide a photovoltaic system including the above photovoltaic module junction box.
In order to achieve the first object, the invention provides the following technical scheme:
a photovoltaic module junction box comprising:
a box body;
set up in at least a set of copper aluminium switching subassembly in the box body, every group copper aluminium switching subassembly includes copper base plate, at least one copper aluminium transition piece and an at least aluminium cable, the copper end of copper aluminium transition piece with connect through the diode electricity between the copper base plate, the one end of aluminium cable with the aluminium end electricity of copper aluminium transition piece is connected, just the other end of aluminium cable stretches out the box body.
Preferably, in the photovoltaic module junction box, the number of the copper substrates in each group of the copper-aluminum adapter modules is multiple, and the multiple copper substrates are sequentially connected in series;
the two copper substrates are electrically connected through a diode.
Preferably, in the photovoltaic module junction box, each group of the copper-aluminum adapter assemblies includes two copper-aluminum transition pieces and two aluminum cables, and the two aluminum cables are electrically connected with the aluminum ends of the two copper-aluminum transition pieces respectively.
Preferably, in the photovoltaic module junction box, the copper-aluminum transition piece is a copper-aluminum transition plate;
the copper-aluminum transition plate comprises a copper sub-plate and an aluminum sub-plate which are arranged along a first direction.
Preferably, in the junction box for the photovoltaic module, the copper sub-plate is provided with a copper busbar interface, and the copper busbar interface is used for being connected with a copper busbar of the photovoltaic module;
the copper busbar and the copper electrode of the diode are fixedly connected with the copper sub-plate in a welding or crimping mode.
Preferably, in the photovoltaic module junction box, the area of the copper-aluminum transition plate is larger than that of the copper substrate.
Preferably, in the photovoltaic module junction box, one side of the copper sub-plate is flush with one side of the aluminum sub-plate; alternatively, the first and second electrodes may be,
the center line of the copper sub-plate is aligned with the center line of the aluminum sub-plate.
Preferably, in the photovoltaic module junction box, the copper-aluminum transition piece is a copper-aluminum transition joint, and a copper end of the copper-aluminum transition joint is in contact with and fixed to the copper substrate;
and the copper end of the copper-aluminum transition joint is fixed with the copper substrate through a screw.
Preferably, in the photovoltaic module junction box, the plurality of diodes of the photovoltaic module junction box are integrated into a diode group.
Preferably, in the photovoltaic module junction box, the box body comprises a plurality of sub-box bodies, wherein one copper-aluminum transition piece and one copper substrate are arranged in two sub-box bodies, and a plurality of copper substrates are arranged in the rest sub-box bodies.
Preferably, in the junction box for photovoltaic modules, the copper substrate is provided with a copper busbar interface, and the copper busbar interface is used for being connected with a copper busbar of a photovoltaic module;
the copper bus bar and the copper electrode of the diode are fixedly connected with the copper substrate in a welding or crimping mode.
Preferably, in the photovoltaic module junction box, a connecting terminal is arranged at an end of the aluminum cable extending out of the box body;
every group copper aluminium adapter assembly includes two aluminium cables and two the aluminium cable stretches out the tip of box body is provided with male connecting terminal and female connecting terminal respectively.
A photovoltaic system comprising a photovoltaic module and a photovoltaic module junction box as described in any one of the above.
The photovoltaic module junction box provided by the invention can be preassembled, namely a copper substrate, a copper-aluminum transition piece and an aluminum cable can be preassembled, and the end part of the aluminum cable extending out of the box body is electrically connected with the aluminum cable of the junction box or the string inverter only on site, so that cutting and compression joint in the connection process of the aluminum cable and the copper-aluminum transition piece on site are avoided, and the strength and difficulty of site construction are reduced. When the photovoltaic module junction box provided by the invention is applied, the end part of the aluminum cable extending out of the box body is directly and electrically connected with the aluminum cable of the junction box or the group string inverter on site.
In order to achieve the second object, the invention further provides a photovoltaic system, which comprises any one of the photovoltaic module junction boxes. Because the photovoltaic module junction box has the technical effects, a photovoltaic system with the photovoltaic module junction box also has corresponding technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of the connection of outgoing lines of a photovoltaic module in the prior art;
fig. 2 is a schematic structural diagram of a junction box of a photovoltaic module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a copper-aluminum transition plate provided in an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a copper-aluminum transition plate according to another embodiment of the present invention;
fig. 5 is a schematic structural view of a photovoltaic module junction box according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a copper-aluminum transition joint provided in an embodiment of the present invention;
fig. 7 is a schematic structural view of a photovoltaic module junction box according to another embodiment of the present invention;
fig. 8 is a schematic structural view of a photovoltaic module junction box according to another embodiment of the present invention;
fig. 9 is a schematic view of an aluminum cable and a connection terminal according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of a photovoltaic system according to an embodiment of the present invention.
In fig. 1:
01-photovoltaic module, 02-copper cable, 03-copper aluminum transition connector, 04-aluminum cable;
in fig. 2-10:
the photovoltaic module comprises an A-photovoltaic module junction box, a 1-box body, a 1 a-sub-box body, a 2-copper busbar interface, a 3-diode, a 4-copper substrate, a 5-aluminum cable, a 6-copper-aluminum transition plate, a 6 a-copper sub-plate, a 6 b-aluminum sub-plate, a 7-copper-aluminum transition joint, a 7 a-copper joint, a 7 b-aluminum joint, an 8-diode group, a 9-male connecting terminal and a 10-female connecting terminal.
Detailed Description
A first object of the present invention is to provide a photovoltaic module junction box, the structural design of which can be pre-assembled, avoiding on-site cutting and crimping, reducing on-site construction strength and difficulty, and a second object of the present invention is to provide a photovoltaic system comprising the above photovoltaic module junction box.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 2 to 10, a photovoltaic module junction box a provided by the present invention includes a box body 1 and at least one set of copper-aluminum adapter modules, where the copper-aluminum adapter modules are disposed in the box body 1.
Each group of copper-aluminum adapter assemblies comprises a copper substrate 4, at least one copper-aluminum transition piece and at least one aluminum cable 5. The copper substrate 4 is electrically connected with the copper end of the copper-aluminum transition piece. Specifically, the copper end of the copper-aluminum transition piece is electrically connected with the copper substrate 4 through the diode 3. One end of the aluminum cable 5 is electrically connected with the aluminum end of the copper-aluminum transition piece, and the other end of the aluminum cable 5 extends out of the box body 1.
The photovoltaic module junction box A provided by the invention can be pre-assembled, namely the copper substrate 4, the copper-aluminum transition piece and the aluminum cable 5 can be pre-assembled, and the end part of the aluminum cable 5 extending out of the box body 1 is only electrically connected with the aluminum cable of the junction box or the string inverter on site, so that cutting and compression joint in the connection process of the aluminum cable 5 and the copper-aluminum transition piece on site are avoided, and the strength and difficulty of site construction are reduced. When the photovoltaic module junction box A provided by the invention is applied, the end part of the aluminum cable 5 extending out of the box body 1 can be directly and electrically connected with the aluminum cable 5 of the junction box or the string inverter on site. In an embodiment, in each set of cu-al adapter assemblies, the number of the copper substrates 4 may be multiple, and the multiple copper substrates 4 are sequentially connected in series. Specifically, the number of the copper substrates 4 is N, wherein N is more than or equal to 2. The N copper substrates 4 are a first copper substrate, a second copper substrate … …, and an nth copper substrate, respectively. The first copper substrate, the second copper substrate … … and the Nth copper substrate are connected in series in sequence, and the copper end of the copper-aluminum transition piece is electrically connected with the copper end of the first copper substrate or the Nth copper substrate. When each group of copper-aluminum adapter assemblies comprises two copper-aluminum transition pieces, the copper end of one copper-aluminum transition piece is electrically connected with the first copper substrate, and the copper end of the other copper-aluminum transition piece is electrically connected with the Nth copper substrate, so that the copper end of one copper-aluminum transition piece, the first copper substrate, the second copper substrate … … the Nth copper substrate and the copper end of the other copper-aluminum transition piece are sequentially connected in series, namely a plurality of copper substrates 4 are sequentially connected between the copper ends of the two copper-aluminum transition pieces in series.
The two copper substrates 4 are electrically connected through the diode 3 to realize the serial connection of the two copper substrates 4.
The number of the copper substrates 4 is preferably 2 or 4, although the number of the copper substrates 4 may be set according to the actual situation, and the number of the copper substrates 4 may also be one, which is not limited herein.
Optionally, each group of copper-aluminum adapter assemblies includes two copper-aluminum transition pieces and two aluminum cables 5, and the two aluminum cables 5 are electrically connected to the aluminum ends of the two copper-aluminum transition pieces, respectively. Specifically, when each group of copper-aluminum adapter assemblies comprises one copper substrate 4, the copper substrate 4 is electrically connected with the copper ends of the two copper-aluminum transition pieces. The copper end of the copper-aluminum transition piece is electrically connected with the copper substrate 4 through the diode 3. When each group of copper-aluminum adapter assemblies comprises a plurality of copper substrates 4, the plurality of copper substrates 4 are sequentially connected between the copper ends of the two copper-aluminum transition pieces in series.
As shown in fig. 2, the copper-aluminum transition piece may be a copper-aluminum transition plate 6. Specifically, the copper-aluminum transition plate 6 comprises a copper sub-plate 6a and an aluminum sub-plate 6b which are arranged along a first direction, and the copper sub-plate 6a and the aluminum sub-plate 6b are mutually contacted and relatively fixed. The copper end of the copper-aluminum transition piece is a copper sub-plate 6a, and the aluminum end of the copper-aluminum transition piece is an aluminum sub-plate 6 b.
Further, copper divides board 6a to be provided with copper busbar interface 2, and copper busbar interface 2 is used for being connected with photovoltaic module's copper busbar. The copper busbar and the copper electrode of the diode 3 are fixedly connected with the copper sub-plate 6a in a welding or crimping mode. Specifically, the copper busbar and the copper sub-plate 6a may be fixedly connected by welding or crimping, and the copper electrode of the diode 3 and the copper sub-plate 6a are fixedly connected by welding or crimping. The welding method may be friction welding or flash welding, but is not limited herein.
The aluminum sub-plate 6b and the aluminum cable 5 can be directly electrically connected by welding. Because the aluminium core material of aluminium cable 5 is softer, inclines easily or warp the bending when the welding, consequently, can consider near the welding point, increase limit structure, guarantee reliable welding. The limiting structure can be arranged in a positioning groove on the aluminum sub-plate 6b, and is not limited herein.
In a specific embodiment, the areas of the copper sub-plate 6a and the aluminum sub-plate 6b are larger than the area of the copper substrate, so as to improve the heat dissipation effect of the copper-aluminum transition plate 6.
As shown in fig. 3 and 4, the width of the copper sub-plate 6a is not greater than the width of the aluminum sub-plate 6b, and the width directions of the copper sub-plate 6a and the aluminum sub-plate 6b are perpendicular to the first direction. Because the current-carrying capacity of the copper sub-plate 6a is the same as that of the aluminum sub-plate 6b, but the heat dissipation coefficients of copper and aluminum are different, the width of the copper sub-plate 6a is equal to or smaller than that of the aluminum sub-plate 6b, so that the heat dissipation of the aluminum sub-plate 6b is ensured, and the phenomenon that the contact resistance is increased due to the overlarge temperature difference between the copper sub-plate 6a and the aluminum sub-plate 6b is prevented.
Preferably, the width of the aluminum sub-plate 6b may be greater than the width of the copper substrate 4, so as to prevent an excessive temperature difference between the copper substrate 4 and the aluminum sub-plate 6b, and facilitate heat dissipation and wire connection compression of the aluminum sub-plate 6 b.
As shown in fig. 3, the center line of the copper segment 6a and the center line of the aluminum segment 6b may be aligned. So set up, copper aluminium crosses cab apron 6 and is the symmetrical structure along width direction, and the copper aluminium that like this same mould produced crosses cab apron 6, the left and right sides all can use, has reduced manufacturing cost and assemble duration.
As shown in fig. 4, one side of the copper sub-plate 6a may be flush with one side of the aluminum sub-plate 6b, so that the two copper-aluminum transition plates 6 may be arranged in a mirror image manner, so as to distinguish the wires.
As shown in fig. 5, the copper-aluminum transition piece may also be a copper-aluminum transition joint 7, and the copper end of the copper-aluminum transition joint 7 is in contact with and fixed to the copper substrate 4. The aluminum end of the copper-aluminum transition joint 7 may be electrically connected with the aluminum cable 5. The copper end of the copper-aluminum transition joint 7 is a copper joint 7a, and the aluminum end of the copper-aluminum transition joint 7 is an aluminum joint 7 b. The copper-aluminum transition joint 7 is adopted to facilitate pre-assembly. The copper-aluminum transition joint 7 and the aluminum cable 5 can be cold-pressed or welded, so that the copper-aluminum transition joint 7 and the aluminum cable 5 can be connected with the copper substrate 4 after being pre-assembled.
Preferably, the copper end of the copper-aluminum transition joint 7 and the copper substrate 4 can be fixed by screws, and the general welding mode generates high temperature at the welding position, so that hydrogen embrittlement easily occurs, and the welding quality is affected. And the screw connection is adopted, so that the reliability is higher. Of course, the copper end of the copper-aluminum transition joint 7 and the copper substrate 4 may also be welded, and is not limited herein.
As shown in fig. 7, the plurality of diodes 3 of the photovoltaic module junction box a may be integrated into a diode group 8. Diode group 8 is integrated into an organic whole structure with a plurality of diodes, and a plurality of diodes 3 reciprocal anchorage, diode group 8 are installed in box body 1 as a whole, so be more convenient for assembly and carry.
The cartridge 1 may include a plurality of sub-cartridges 1a, the plurality of sub-cartridges 1a being independent of each other. When the copper-aluminum adapter assembly comprises two copper-aluminum transition pieces, the two copper-aluminum transition pieces can be respectively positioned in different branch box bodies 1 a. Specifically, one copper-aluminum transition piece and one copper substrate 4 are arranged in each of the two sub-box bodies 1a, and a plurality of copper substrates 4 are arranged in the rest sub-box bodies 1 a. Namely, one copper-aluminum transition piece and one copper substrate 4 of the copper-aluminum adapter assembly are positioned in one sub-box body 1a, the other copper-aluminum transition piece and the other copper substrate 4 of the copper-aluminum adapter assembly are positioned in the other sub-box body 1a, and the other copper substrates 4 can be distributed into the other sub-box bodies 1a according to actual conditions.
As shown in fig. 8, the number of the sub-box bodies 1a may be three, one copper-aluminum transition piece and one copper substrate 4 of the copper-aluminum adapter assembly are located in one sub-box body 1a, the other copper-aluminum transition piece and the other copper substrate 4 of the copper-aluminum adapter assembly are located in the other sub-box body, and the rest copper substrates 4 are located in the other sub-box body 1 a. Specifically, a copper-aluminum transition piece and a first copper substrate 4 of the copper-aluminum adapter assembly are positioned in one sub-box body 1a, another copper-aluminum transition piece and an Nth copper substrate 4 of the copper-aluminum adapter assembly are positioned in another sub-box body, and the rest copper substrates 4 are positioned in the other sub-box body 1 a. Of course, the number of the sub-boxes 1a may be four, five, etc., and is not limited herein.
In order to facilitate the electrical connection of the copper substrate 4 and the photovoltaic module, the copper substrate 4 may also be provided with a copper busbar interface 2, and the copper busbar interface 2 is used for being connected with the copper busbar of the photovoltaic module. The copper bus bars and the copper electrodes of the diodes 3 are fixedly connected with the copper substrate 4 in a welding or crimping mode. Specifically, the copper bus bar and the copper substrate 4 may be fixedly connected by welding or crimping, and the copper electrode of the diode 3 and the copper substrate 4 are fixedly connected by welding or crimping. The welding method may be friction welding or flash welding, but is not limited herein.
In order to facilitate the connection of the aluminum cable 5 and the aluminum cable of the junction box or the string inverter, the end of the aluminum cable 5 extending out of the box body 1 is provided with a connecting terminal, so that the connecting terminal is directly connected with the aluminum cable of the junction box or the string inverter.
Further, when every group copper aluminium switching subassembly includes two aluminium cables, two aluminium cables 5 stretch out the tip of box body 1 and are provided with public connecting terminal 9 and female connecting terminal 10 respectively, so public connecting terminal 9 and female connecting terminal 10 of two aluminium cables 5 with the collection flow box or the connecting terminal grafting of the aluminium cable 5 of group string dc-to-ac converter can, be convenient for connect more.
In the above embodiments, the aluminum cable 5 may be 6mm2Or 4mm2The cable of (2). Considering that the current density of the aluminum cable 5 is lower than that of the copper cable, the aluminum cable 5 is preferably 6mm2To ensure the performance of the photovoltaic module junction box a.
Photovoltaic module terminal box A can be intelligent terminal box, and it possesses photovoltaic module's control, shutoff or power optimization function.
Based on the photovoltaic module junction box a provided in the above embodiment, the invention also provides a photovoltaic system, which includes a photovoltaic module and any one of the photovoltaic module junction boxes a provided in the above embodiments. Because this photovoltaic system has adopted photovoltaic module terminal box A in above-mentioned embodiment, adopt aluminium cable 5 to connect between photovoltaic module terminal box A and collection flow box or the group string dc-to-ac converter, the cost is reduced, please refer to above-mentioned embodiment for other beneficial effect of this photovoltaic system in addition.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Claims (13)
1. A photovoltaic module junction box, comprising:
a box body (1);
set up in at least a set of copper aluminium switching subassembly in box body (1), every group copper aluminium switching subassembly includes copper base plate (4), at least one copper aluminium transition piece and an at least aluminium cable (5), the copper end of copper aluminium transition piece with connect through diode (3) electricity between copper base plate (4), the one end of aluminium cable (5) with the aluminium end electricity of copper aluminium transition piece is connected, just the other end of aluminium cable (5) stretches out box body (1).
2. The junction box of a photovoltaic module according to claim 1, wherein the number of the copper substrates (4) in each group of copper-aluminum adapter modules is plural, and the plural copper substrates (4) are connected in series in sequence;
the two copper substrates (4) are electrically connected through a diode (3).
3. The photovoltaic module junction box of claim 1, wherein each set of copper-aluminum adapter modules comprises two copper-aluminum transition pieces and two aluminum cables (5), the two aluminum cables (5) being electrically connected to the aluminum ends of the two copper-aluminum transition pieces, respectively.
4. The photovoltaic module junction box of claim 1, wherein said copper-aluminum transition piece is a copper-aluminum transition plate (6);
the copper-aluminum transition plate (6) comprises a copper sub-plate (6a) and an aluminum sub-plate (6b) which are arranged along a first direction.
5. The photovoltaic module junction box according to claim 4, characterized in that the copper sub-plate (6a) is provided with a copper busbar interface (2), the copper busbar interface (2) being intended for connection with a copper busbar of a photovoltaic module;
the copper busbar and the copper electrode of the diode (3) are fixedly connected with the copper sub-plate (6a) in a welding or crimping mode.
6. The photovoltaic module junction box according to claim 4, wherein the area of the copper-aluminum transition plate (6) is larger than the area of the copper substrate.
7. The photovoltaic module junction box according to claim 4, characterized in that one side of the copper sub-plate (6a) is arranged flush with one side of the aluminum sub-plate (6 b); alternatively, the first and second electrodes may be,
the center line of the copper sub-plate (6a) is aligned with the center line of the aluminum sub-plate (6 b).
8. The photovoltaic module junction box according to claim 1, wherein the copper-aluminum transition piece is a copper-aluminum transition joint (7), and a copper end of the copper-aluminum transition joint (7) is in contact with and fixed to the copper substrate (4);
and the copper end of the copper-aluminum transition joint (7) is fixed with the copper substrate (4) through a screw.
9. The pv junction box according to claim 1, characterised in that the diodes (3) of the pv junction box are integrated into a diode group (8).
10. The photovoltaic module junction box according to claim 1, wherein the box body (1) comprises a plurality of sub-box bodies (1a), wherein one copper-aluminum transition piece and one copper substrate are arranged in each of two sub-box bodies (1a), and a plurality of copper substrates (4) are arranged in the other sub-box bodies (1 a).
11. The pv module junction box according to claim 1, characterized in that the copper substrate (4) is provided with a copper busbar interface (2), the copper busbar interface (2) being intended for connection with a copper busbar of a pv module;
the copper bus bar (2) and the copper electrode of the diode (3) are fixedly connected with the copper substrate (4) in a welding or crimping mode.
12. The photovoltaic module junction box according to claim 1, characterized in that the end of the aluminum cable (5) that protrudes out of the box body (1) is provided with a connection terminal;
every group copper aluminium adapter assembly includes two aluminium cables and two aluminium cable (5) stretch out the tip of box body (1) is provided with male connection terminal (9) and female connection terminal (10) respectively.
13. A photovoltaic system comprising a photovoltaic module and the photovoltaic module junction box of any of claims 1-12.
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| CN202111612173.5A CN114337532A (en) | 2021-12-27 | 2021-12-27 | Photovoltaic system and photovoltaic module junction box |
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| CN108134574A (en) * | 2017-12-14 | 2018-06-08 | 常州星海电子股份有限公司 | Solar junction box triad photovoltaic module |
| CN111446557A (en) * | 2020-03-26 | 2020-07-24 | 阳光电源股份有限公司 | Wiring device of photovoltaic equipment |
| CN214754201U (en) * | 2021-04-13 | 2021-11-16 | 深圳市沃尔核材股份有限公司 | Connecting structure between cable terminal and busbar |
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