CN220041882U - Photovoltaic module - Google Patents

Abstract

The utility model belongs to the technical field of photovoltaic manufacture, and discloses a photovoltaic module, which comprises a plurality of frames, a lamination module and a junction box, wherein the lamination module comprises a battery plate, a front glass plate, a back glass plate and a conductive structure, the front glass plate and the back glass plate form a lamination area, the battery plate is positioned in the lamination area, the conductive structure is fixedly arranged on the battery plate and is provided with at least one side part exceeding the lamination area, the frames are connected end to end and are arranged around the lamination module, and the junction box is arranged on the frames and is connected with the part of the conductive structure exceeding the lamination area. The part of the conducting structure on the battery plate exceeds the laminating area, and the part of the junction box extending out of the laminating area is arranged at the corresponding position of the frame according to the conducting structure, so that the junction box can not shade the battery plate, the generated heat can not influence the battery plate, the hot spot effect generated by the junction box is eliminated, the probability of damage of the battery plate is reduced, the power generation efficiency is improved, and the service life is prolonged.

Description

Photovoltaic module

Technical Field

The utility model relates to the technical field of photovoltaic manufacturing, in particular to a photovoltaic module.

Background

Along with the increasing severity of energy crisis, the energy structure is being greatly regulated, and the proportion of a batch of environment-friendly renewable energy sources such as wind energy, solar energy and the like is increased year by year, so that powerful development power is brought to the photovoltaic industry. Solar photovoltaic systems are gradually popularized and applied to building roofs, but because battery panels are more or less shielded by other building objects or cloud layers, dust and the like and are matched with the battery panels, hot spots are easy to occur, if the temperature of the hot spots exceeds a certain limit, welding spots on the battery panels can be melted and grid lines are damaged, so that the power generated by the whole photovoltaic array is rapidly reduced and even the system is damaged.

The photovoltaic module in the prior art is provided with upper, middle and lower bus bars, and the middle bus bars are led out from the opening of the back glass plate and are connected with the junction box, and the junction box is fixed on the back glass plate by using silica gel. The technology not only leads to the back glass plate to be damaged in sealing performance, but also leads to a large amount of heat generated during working due to the fact that the current at the junction box is larger, so that the hot spot effect can occur in the region where the junction box is arranged, the probability of damage to the battery plate is greatly increased, the power generation efficiency is reduced, and the service life of the photovoltaic module is reduced.

Disclosure of Invention

The utility model aims to provide a photovoltaic module, which ensures the tightness of a back glass plate, reduces the probability of damage of a battery plate, improves the power generation efficiency and prolongs the service life of the photovoltaic module.

To achieve the purpose, the utility model adopts the following technical scheme:

the photovoltaic module includes:

the laminating assembly comprises a battery plate, a front glass plate, a back glass plate and a conductive structure, wherein the front glass plate and the back glass plate form a laminating area, the battery plate is positioned in the laminating area, a first adhesive plate is clamped between the front glass plate and the battery plate, a second adhesive plate is clamped between the back glass plate and the battery plate, the conductive structure is fixedly arranged on the battery plate, and the conductive structure is provided with a part of which at least one side exceeds the laminating area;

the frames are connected end to end and are annularly arranged around the laminated assembly;

and the junction box is arranged on the frame and is connected with the part, exceeding the lamination area, of the conductive structure.

Optionally, the conductive structure includes a bus bar and an interconnection bar, the panel includes a plurality of battery pieces, the interconnection bar is used for connecting a plurality of the battery pieces in series into a plurality of battery string groups, the bus bar is connected to two ends of the plurality of battery string groups, the bus bar is used for connecting a plurality of the battery string groups into a whole panel, and a part of the bus bar is located outside the lamination area and is connected with the junction box.

Optionally, the busbar is a sheet structure.

Optionally, the battery board includes a plurality of battery pieces, conductive structure is conductive backplate, be equipped with on the conductive backplate according to a plurality of battery piece position distribution's conductive metal strip, conductive metal strip with corresponding the battery piece laminating, and with a plurality of battery pieces are connected into an integral battery board, conductive metal strip on the conductive backplate surpass laminate region with the terminal box is connected.

Optionally, the frame is an insulating frame.

Optionally, the outer surface of the frame is covered with an insulating layer.

Optionally, a portion of the conductive structure beyond the lamination area is coated with an adhesive film.

Optionally, the junction box is provided with a conductive connector, and the photovoltaic module further comprises a connecting piece, wherein the connecting piece is used for connecting the part of the conductive structure, which exceeds the lamination area, with the conductive connector.

Optionally, a conductive connector is provided on the junction box, and the conductive connector is welded with a portion of the conductive structure beyond the lamination area.

Optionally, the photovoltaic module further comprises a connecting bolt, and the connecting bolt is used for connecting the junction box and the frame.

The utility model has the beneficial effects that:

the utility model provides a photovoltaic module, which is characterized in that a conductive structure on a battery board is provided with at least one part of which one side exceeds a lamination area, so that a junction box can be arranged at a corresponding position of a frame according to the part of the conductive structure extending out of the lamination area, thereby avoiding the problem that the tightness of the back glass board is damaged due to punching on the back glass board.

Drawings

FIG. 1 is an exploded view of a photovoltaic module of the present utility model;

FIG. 2 is an assembly view of the photovoltaic module of the present utility model;

FIG. 3 is a cross-sectional view of a corner of a photovoltaic module of the present utility model;

FIG. 4 is a schematic illustration of a conductive structure in the form of a bus strap-interconnect strap in accordance with the present utility model;

FIG. 5 is a schematic illustration of the present utility model employing a bus solder strip sheet structure;

fig. 6 is a schematic diagram of a conductive structure in the form of a conductive back plate in accordance with the present utility model.

In the figure:

1. a frame; 11. an angle code;

2. a lamination assembly; 21. a battery panel; 22. a front glass plate; 23. a back glass plate; 24. a conductive structure; 241. a bus solder strip; 242. interconnecting the welding strips; 243. a conductive metal strip; 25. a first glue plate; 26. a second glue plate; 3. and a junction box.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

In order to ensure the tightness of the back glass plate 23, reduce the damage probability of the battery plate 21, improve the power generation efficiency, and prolong the service life of the photovoltaic module, the embodiment provides a photovoltaic module.

As shown in fig. 1 to 6, the photovoltaic module includes a plurality of frames 1, a lamination module 2 and a junction box 3, the lamination module 2 includes a panel 21, a front glass plate 22, a back glass plate 23 and a conductive structure 24, the front glass plate 22 and the back glass plate 23 form a lamination area, the panel 21 is located in the lamination area, a first adhesive plate 25 is sandwiched between the front glass plate 22 and the panel 21, a second adhesive plate 26 is sandwiched between the back glass plate 23 and the panel 21, the conductive structure 24 is fixedly arranged on the panel 21, the conductive structure 24 has a portion with at least one side exceeding the lamination area, the frames 1 are connected end to end, are annularly arranged around the lamination module 2, the junction box 3 is arranged on the frames 1, and the junction box 3 is connected with the portion with the conductive structure 24 exceeding the lamination area.

The conductive structure 24 on the battery plate 21 is provided with the part of which at least one side exceeds the lamination area, so that the junction box 3 can be arranged at the corresponding position of the frame 1 according to the part of the conductive structure 24 extending out of the lamination area, thus avoiding the problem that the tightness of the back glass plate 23 is damaged due to punching on the back glass plate 23, and the junction box 3 can not shade the battery plate 21 due to the fact that the junction box 3 is arranged on the frame 1, and the heat generated by the junction box 3 can not influence the battery plate 21, thereby eliminating the hot spot effect generated by the junction box 3, reducing the probability of damage of the battery plate 21, improving the power generation efficiency and prolonging the service life of the photovoltaic module.

In the present embodiment, the front glass plate 22 and the back glass plate 23 are both transparent glass plates, wherein a plate made of a transparent organic material may be used instead of the front glass plate 22 and the back glass plate 23. When the laminating machine laminates the front glass plate 22, the first adhesive plate 25, the battery plate 21, the second adhesive plate 26 and the back glass plate 23 in sequence, the first adhesive plate 25, the battery plate 21, the second adhesive plate 26 and the back glass plate 23 are melted through the high temperature of the laminating machine, air in the laminating process is pumped out through the vacuumizing function of the laminating machine, the front glass plate 22, the battery plate 21 and the back glass plate 23 are connected together, after the lamination is finished, as the first adhesive plate 25 and the second adhesive plate 26 melt and extrude, overflowing adhesive parts are cut off at the moment, the appearance flatness of the laminated assembly 2 is ensured, then silica gel is distributed in the frame 1, the frame 1 and the laminated assembly 2 are connected and fixed through a framing machine, and the frames 1 are connected together head and tail through corner codes 11. In addition, since the conductive structure 24 has at least one side portion beyond the lamination area, the conductive structure 24 may have a plurality of portions beyond the lamination area, and thus the junction box 3 may be disposed on any one of the frames 1 according to circumstances, and the junction box 3 may be disposed inside the frame 1 or outside the frame 1.

Alternatively, as shown in fig. 1 and 4, the conductive structure 24 includes a bus bar 241 and an interconnection bar 242, the panel 21 includes a plurality of battery pieces, the interconnection bar 242 is used for connecting the plurality of battery pieces in series into a plurality of battery string groups, the bus bar 241 is connected to both ends of the plurality of battery string groups, the bus bar 241 is used for connecting the plurality of battery string groups into an integral panel 21, and a portion of the bus bar 241 is located outside the lamination area and is connected to the junction box 3. The current generated by the battery cell is attributed to the junction box 3 by using the interconnection strap 242 and the bus strap 241.

In the embodiment, as the busbar welding strips 241 are arranged at the two ends of the battery plate 21, compared with the traditional photovoltaic module provided with the upper, middle and lower busbar welding strips 241, the mounting position of the middle busbar welding strips 241 is saved, so that the overall structure of the battery plate 21 is more compact, the area of the photovoltaic module is reduced, and the power generation efficiency of the photovoltaic module is improved; in addition, since the IBC battery (full back electrode contact battery) is selected in this embodiment, the interconnection solder strips 242 are all disposed on the back of the panel 21, so as to ensure uniformity of the color of the panel 21, thereby achieving the best conductive effect and improving the overall aesthetic degree of the photovoltaic module. Of course in other embodiments, a double sided welded cell construction such as PERC/TOPCON/HJT would be equally suitable.

Further, as shown in fig. 1 and 5, the bus bar 241 has a sheet-like structure. Thereby ensuring that the portion of the bus bar 241 can extend beyond the lamination area to be connected to the junction box 3 provided at the frame 1. In this embodiment, the busbar 241 is a galvanized copper sheet.

In this embodiment, as shown in fig. 1 and 6, another conductive structure 24 is provided, the battery plate 21 includes a plurality of battery pieces, the conductive structure 24 is a conductive back plate, conductive metal strips 243 distributed according to the positions of the plurality of battery pieces are provided on the conductive back plate, the conductive metal strips 243 are attached to the corresponding battery pieces, and the plurality of battery pieces are connected into an integral battery plate 21, and the conductive metal strips 243 on the conductive back plate beyond the lamination area are connected with the junction box 3. Through using electrically conductive backplate to connect a plurality of battery pieces into a holistic panel 21, compare in the mode that interconnection welding strip 242 and conflux welding strip 241 are connected, it is more convenient, connection efficiency is higher.

Optionally, the frame 1 is an insulating frame. Through selecting insulating frame, avoid the electric leakage to lead to causing harm to surrounding personnel. In this embodiment, an insulating frame made of a polymer may be selected.

Optionally, the outer surface of the frame 1 is covered with an insulating layer. Through the surface cover insulating layer at frame 1 to avoid the electric leakage to lead to causing harm to surrounding personnel, simultaneously because frame 1 is the metal frame, its supporting strength is higher. In other embodiments, sealant may be disposed inside the frame 1, so as to reduce the probability of leakage.

Optionally, the portion of the conductive structure 24 beyond the lamination area is coated with a glue film. The adhesive film is coated on the part of the conductive structure 24 exceeding the lamination area, so that the sealing performance of the exceeding part is ensured, and the condition of electric leakage caused by the communication of other metal parts of the conductive part is avoided. In this embodiment, when the interconnection strap 242 is connected to the bus strap 241, the portion of the bus strap 241 beyond the lamination area is covered with the adhesive film, and when the conductive structure 24 is a conductive back plate, the conductive metal strip 243 beyond the lamination area on the conductive back plate may be covered with the adhesive film. Since the frame 1 is disposed on the periphery of the laminated assembly 2, the portion of the conductive structure 24 beyond the laminated area may be bent, and the portion to be bent may not be covered with the adhesive film to achieve the bending effect.

Optionally, the junction box 3 is provided with a conductive connector, and the photovoltaic module further includes a connector for connecting a portion of the conductive structure 24 beyond the lamination area with the conductive connector. By providing the connection means, the portion of the conductive structure 24 beyond the lamination area is thus brought into electrical communication with the junction box 3. In this embodiment, the connecting member may be a metal-supported connecting bolt, which is simple and easy to obtain.

Optionally, the terminal box 3 is provided with an electrically conductive tab, which is soldered to a portion of the conductive structure 24 beyond the lamination area. The portion of the conductive structure 24 beyond the lamination area is firmly connected with the junction box 3, so that the phenomenon that the portion of the conductive structure 24 beyond the lamination area is disconnected with the junction box 3, and current cannot flow is avoided.

Optionally, the photovoltaic module further comprises a connecting bolt for connecting the junction box 3 and the frame 1. The junction box 3 and the frame 1 are connected through the connecting bolts, so that the junction box 3 is conveniently dismounted on the frame 1, and the junction box 3 can be replaced at any time.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Photovoltaic module, its characterized in that, photovoltaic module includes:

the laminating assembly (2), the laminating assembly (2) comprises a battery plate (21), a front glass plate (22), a back glass plate (23) and a conductive structure (24), wherein the front glass plate (22) and the back glass plate (23) form a laminating area, the battery plate (21) is positioned in the laminating area, a first rubber plate (25) is clamped between the front glass plate (22) and the battery plate (21), a second rubber plate (26) is clamped between the back glass plate (23) and the battery plate (21), and the conductive structure (24) is fixedly arranged on the battery plate (21), and the conductive structure (24) is provided with at least one side exceeding the part of the laminating area;

the frames (1) are connected end to end, and are annularly arranged around the laminated assembly (2);

and the junction box (3) is arranged on the frame (1), and the junction box (3) is connected with the part, exceeding the lamination area, of the conductive structure (24).

2. The photovoltaic module according to claim 1, wherein the conductive structure (24) comprises a bus bar (241) and an interconnection bar (242), the panel (21) comprises a plurality of battery pieces, the interconnection bar (242) is used for connecting the plurality of battery pieces in series into a plurality of battery string groups, the bus bar (241) is connected to two ends of the plurality of battery string groups, the bus bar (241) is used for connecting the plurality of battery string groups into a whole panel (21), and a part of the bus bar (241) is located outside the lamination area and is connected with the junction box (3).

3. The photovoltaic module according to claim 2, characterized in that the busbar (241) is of sheet-like structure.

4. The photovoltaic module according to claim 1, wherein the cell plate (21) comprises a plurality of cell sheets, the conductive structure (24) is a conductive back plate, conductive metal strips (243) distributed according to the positions of the plurality of cell sheets are arranged on the conductive back plate, the conductive metal strips (243) are attached to the corresponding cell sheets, the cell sheets are connected into a whole, and the conductive metal strips (243) exceeding the lamination area on the conductive back plate are connected with the junction box (3).

5. The photovoltaic module according to claim 1, characterized in that the frame (1) is an insulating frame.

6. The photovoltaic module according to claim 1, characterized in that the outer surface of the frame (1) is covered with an insulating layer.

7. The photovoltaic module according to any of claims 1-6, characterized in that the portion of the conductive structure (24) beyond the lamination area is covered with a glue film.

8. The photovoltaic module according to claim 1, characterized in that the junction box (3) is provided with an electrically conductive connection, the photovoltaic module further comprising a connection for connecting the portion of the electrically conductive structure (24) that exceeds the lamination area with the electrically conductive connection.

9. The photovoltaic module according to claim 1, characterized in that the junction box (3) is provided with an electrically conductive tab welded to the portion of the electrically conductive structure (24) that extends beyond the lamination area.

10. The photovoltaic module according to claim 1, characterized in that it further comprises a connection bolt for connecting the junction box (3) and the frame (1).