CN220022741U - Photovoltaic module junction box and photovoltaic module - Google Patents

Abstract

The utility model provides a photovoltaic module terminal box, includes terminal box casing and reinforcement, and the reinforcement includes fixed wall and supporting wall, and wherein fixed wall is connected in terminal box casing surface, and the supporting wall is connected and is extended to photovoltaic cell panel surface and looks butt with it with fixed wall to restrict the relative movement between terminal box and the photovoltaic cell panel. The junction box can improve the resistance to external force impact of the photovoltaic module junction box in the transportation, installation and service processes, and reduce the risk of accidental damage. The utility model further provides a photovoltaic module.

Description

Photovoltaic module junction box and photovoltaic module

Technical Field

The utility model belongs to the field of photovoltaic power generation, and particularly relates to a photovoltaic module junction box and a photovoltaic module.

Background

The junction box is an important element of the photovoltaic module and is used for connecting the photovoltaic module with a load, outputting current generated by the photovoltaic module, and meanwhile, playing roles of preventing a hot spot effect and protecting the module. The junction box in the conventional photovoltaic module is generally fixedly installed on the back surface of the photovoltaic module by using silica gel, but for the BIPV (building integrated photovoltaic) module, the junction box is arranged on the back surface to greatly influence the appearance of the photovoltaic module, so the junction box is generally installed on the side surface of the BIPV module. However, since the junction box mounted on the side protrudes from the photovoltaic module, it is easily damaged or detached by knocks and impacts during transportation, installation and use. Accordingly, providing an impact resistant junction box mounting structure has high utility for improving the durability of the BIPV assembly.

Disclosure of Invention

The utility model aims to provide a junction box of a photovoltaic module, which improves the shock resistance of the junction box. The utility model further provides a photovoltaic module.

According to an aspect of an embodiment of the present utility model, there is provided a junction box for a photovoltaic module, including a junction box housing including a mounting surface for interfacing with a side surface of a photovoltaic panel, the junction box further including a stiffener including a fixing wall fixedly connected to the housing and a first support wall connected to the fixing wall and extending beyond the mounting surface to allow the fixing wall to abut against a front or rear surface of the photovoltaic panel to limit relative movement of the junction box and the photovoltaic panel.

The first supporting wall can provide additional support and limit for the junction box, and can disperse impact load born on the mounting surface by self structural strength when the junction box is impacted, so that the impact resistance of the junction box is improved, and the junction box is prevented from falling off.

Further, a plurality of the reinforcing members are mounted on the junction box housing. The plurality of reinforcing pieces can further improve the shock resistance of the junction box, meanwhile, the plurality of reinforcing pieces bear the shock resistance jointly, the volume of a single reinforcing piece can be reduced, the complexity of part manufacturing is reduced, and further, the specific installation positions of the reinforcing pieces can be flexibly arranged according to the structural characteristics of the junction box.

Further, the first support walls of the plurality of stiffeners are respectively abutted against the front and back surfaces of the photovoltaic panel, and the arrangement of the stiffeners on both sides of the junction box can resist impacts in all directions.

Further, the reinforcement further includes a second support wall connected to the fixed wall or the first support wall and extending in the thickness direction of the photovoltaic panel along the housing surface. The second supporting wall can further improve the structural strength of the reinforcing piece and improve the shock resistance.

Further, the second support wall extends along the mounting surface. The second support wall extends along the mounting surface to enable the reinforcement to be integrally formed into a T-shaped structure, so that the resistance of the reinforcement to deformation can be improved.

Further, the reinforcement comprises two fixing walls and first supporting walls, the two fixing walls and the first supporting walls are respectively connected to two sides of the junction box shell and are integrally connected through the second supporting walls, and the two first supporting walls are respectively abutted to the front surface and the back surface of the photovoltaic cell panel. The two supporting walls are arranged on the reinforcing piece, so that the impact from the front and back directions of the photovoltaic cell panel can be resisted simultaneously, and the impact resistance of the junction box is improved.

Further, the stiffener is configured in an H-shape, and the second support wall extends along the mounting surface. The H-shaped reinforcing piece can improve the structural strength of the reinforcing piece and improve the shock resistance of the junction box.

Further, the reinforcement is configured in a channel shape, and the second support wall is connected to the support wall and extends along a side away from the mounting surface. The reinforcement is configured to wrap around the terminal block housing from the outside in a channel shape, which can provide protection for the terminal block itself while improving the impact resistance of the terminal block.

According to an embodiment of another aspect of the present utility model, there is provided a photovoltaic module including a photovoltaic panel and a junction box, the junction box employing any one of the junction boxes described above, the junction box being mounted on a side surface of the photovoltaic panel. The junction box of the photovoltaic module can be firmly arranged on the side face of the photovoltaic cell panel, has stronger tolerance to collision and impact in the transportation, installation and use processes, and effectively improves the service life of the photovoltaic module.

Further, the photovoltaic cell panel is bonded with the first supporting wall through silica gel. The silica gel bonding improves the connection strength between the reinforcing piece and the photovoltaic cell panel so as to further improve the impact resistance of the junction box.

Drawings

FIG. 1 is a schematic view of a photovoltaic module in one embodiment;

FIG. 2 is a schematic view of a partial cross-sectional structure of a junction box in one embodiment;

FIG. 3 is a schematic view of a partial structure of the area A in FIG. 1 according to one embodiment;

FIG. 4 is a schematic view of a cross-sectional structure B-B in FIG. 3 according to another embodiment;

FIG. 5 is a schematic view of the cross-sectional structure B-B in FIG. 3 in yet another embodiment;

FIG. 6 is a schematic view of the cross-sectional structure B-B of FIG. 3 in yet another embodiment;

FIG. 7 is a schematic view of a partial structure of the area A in FIG. 1 according to another embodiment;

FIG. 8 is a schematic view of the cross-sectional structure of FIG. 7 in yet another embodiment.

The above drawings are provided for the purpose of explaining the present utility model in detail so that those skilled in the art can understand the technical concept of the present utility model, and are not intended to limit the present utility model. For simplicity of illustration, the above figures show only schematically the structures associated with the technical features of the utility model, and not the complete device and all the details are drawn strictly to the actual scale.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings by means of specific examples.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment herein. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments limited to the same embodiment. Those skilled in the art will appreciate that embodiments herein may be combined with other embodiments without structural conflict.

In the description herein, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be movably connected, fixedly connected, or integrally formed. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those skilled in the art according to specific circumstances.

In the description herein, terms such as "upper," "lower," "left," "right," "transverse," "longitudinal," "height," "length," "width," and the like that indicate an azimuth or positional relationship are intended to accurately describe the embodiments and simplify the description, and do not limit the details or structures involved to having to have a particular azimuth, mount or operate in a particular azimuth, and are not to be construed as limiting embodiments herein.

In the description herein, the terms "first," "second," and the like are used merely to distinguish between different objects and should not be construed as indicating relative importance or defining the number, particular order, or primary and secondary relationships of the technical features described. In the description herein, the meaning of "plurality" is at least two.

The photovoltaic module converts solar energy into electric energy through the battery piece to output, wherein the junction box is used for connecting the battery piece conductive matrix and outputting current. Generally, the junction box of the photovoltaic module is disposed on the back of the photovoltaic cell, but for the BIPV (photovoltaic building integrated) module, since the junction box itself exists as an outer facade of the building, there is a high requirement for the appearance, and the junction box is mounted on the back of the photovoltaic cell to affect the aesthetic degree thereof, so the junction box of the BIPV module needs to be disposed on the side thereof. In one embodiment the BIPV module is constructed as shown in fig. 1 and comprises a photovoltaic panel 1 and a junction box 2, the junction box 2 being mounted on one side of the photovoltaic panel 1 and being connected to a cell 4 covered by a front glass 3 via an electrically conductive matrix for outputting the current generated by the cell 4. Because the junction box 2 is arranged on the side edge of the photovoltaic cell panel 1, the junction box 2 is easy to be collided from the outside, particularly to be impacted along the thickness direction of the photovoltaic cell panel 1 to fall off in the transportation, installation and service processes, so that the photovoltaic module is damaged. In order to solve the above problems, embodiments of the present utility model provide a junction box capable of improving impact resistance of the junction box.

In one embodiment, the junction box 2 and the photovoltaic cell panel 1 are arranged at the position, as shown in fig. 2, of the cross-section structure, the photovoltaic cell panel 1 comprises a front glass 3, a cell piece 4, an encapsulation adhesive film 7 and a back glass 8 along the thickness direction, the photovoltaic cell panel 1 and the junction box 2 are connected through an adhesive 6, and in some embodiments, the adhesive adopts silica gel. The junction box 2 includes a housing 20, wherein the housing 20 is butted with the side of the photovoltaic panel 1 through a mounting surface 22. The junction box 2 further comprises a reinforcing member 5, wherein the reinforcing member 5 comprises a fixed wall 52 and a supporting wall 53, the fixed wall 52 is fixedly connected with the housing 20, the supporting wall 53 is connected with the fixed wall 52 and extends beyond the mounting surface 22 and abuts against the back glass 8, and the adhesive 6 is filled on the contact surface of the supporting wall 53 and the back glass 8 to bond the two together. When the junction box receives an impact from the front direction of the photovoltaic module, the supporting wall 53 can provide support for the junction box 2 and limit the relative movement between the junction box 2 and the photovoltaic panel 1, thereby improving the impact resistance of the junction box 2. The fixing wall 52 is provided with a bayonet 51, the surface of the shell 20 is provided with a buckle 21, and the bayonet 51 and the buckle 21 are matched with each other so that the fixing wall 52 and the shell 20 are fixedly connected together. In other embodiments, the fixed wall 52 may be fixedly coupled to the housing 20 by bolting or bonding. In the preferred embodiment, the stiffener 5 further includes a second support wall 54, the second support wall 54 being connected to the support wall 53 and extending along the mounting face 22 of the housing 20. The second supporting wall 54 enables the reinforcement 5 to be integrally T-shaped, so that the structural strength of the reinforcement 5 is improved, rotation and torsion between the junction box 2 and the photovoltaic cell panel 1 are limited, and the shock resistance of the junction box 2 is further improved. In some embodiments, the second support wall 54 may be omitted to simplify the structure of the reinforcing member 5, but in these embodiments the reinforcing effect of the reinforcing member 5 is reduced.

In a preferred embodiment, as shown in fig. 3, in the installation area a of the junction box 2 in fig. 1, the same junction box 2 is provided with a plurality of reinforcing members 5, further improving the impact resistance of the junction box 2. Meanwhile, the volume of the single reinforcing member 5 can be made smaller, the structure is simple, the processing and the manufacturing are convenient, and the number of the reinforcing members 5 can be flexibly configured according to the specific use environment and the impact resistance requirement of the junction box 2.

In another alternative embodiment, as shown in fig. 4, the cross-sectional structure of B-B in fig. 3 is that the stiffener 5 is disposed on the front surface of the photovoltaic module 1, the fixing wall 52 is fixedly connected to the surface of the housing 20 through the cooperation of the bayonet 51 and the buckle 21, the supporting wall 53 extends beyond the mounting surface 22 and to the surface of the front glass 3 to abut against the front glass, the second supporting wall 54 extends along the mounting surface 22, and the junction box 2 and the photovoltaic panel 1 are bonded together by using silica gel as the adhesive 6. When the junction box receives an impact from the direction of the back of the photovoltaic module, the supporting wall 53 can provide support for the junction box 2, and restrict the relative movement between the junction box 2 and the photovoltaic module 1, thereby improving the impact resistance of the junction box 2.

In yet another alternative embodiment, as shown in fig. 5, the cross-sectional structure B-B of fig. 3 is that the junction box 2 is provided with two opposite reinforcing members 5 at the same cross-sectional position, the fixing walls 52 of the two reinforcing members 5 are fixedly connected to the surface of the housing 20 through the cooperation of the bayonet 51 and the buckle 21, the supporting walls 53 respectively extend beyond the mounting surface 22 to the surface of the front glass 3 and the back glass 8 respectively and abut against the front glass and the back glass, and the second supporting walls 54 respectively extend along the mounting surface 22 oppositely. The adhesive 6 is filled between the junction box 2 and the photovoltaic cell panel 1, and is further filled on the contact surfaces of the supporting wall 53, the front glass 3 and the back glass 8 to form adhesive connection. When the junction box is impacted by the direction from the front or back of the photovoltaic module, the reinforcing piece 5 can provide support for the junction box 2 and limit the relative movement between the junction box 2 and the photovoltaic cell panel 1, so that the impact resistance of the junction box 2 is improved.

In yet another alternative embodiment, shown in fig. 6, the reinforcement member 5 is configured in an H-shape as a whole, and includes two fixing walls 52 and supporting walls 53 connected to each other, respectively, and fixedly connected to the surfaces of the two sides of the housing 20 by the engagement of the bayonet 51 with the buckle 21, respectively, and a second supporting wall 54 extending along the mounting surface 22 and connected between the two supporting walls 53 to be connected as a whole. The support walls 53 are respectively abutted against the surfaces of the front glass 3 and the back glass 8, and bonded together by the adhesive 6. When the junction box is impacted by the direction from the front or back of the photovoltaic module, the reinforcing piece 5 can provide support for the junction box 2 and limit the relative movement between the junction box 2 and the photovoltaic cell panel 1, so that the impact resistance of the junction box 2 is improved. The support walls 53 on both sides are integrally connected, so that the number of parts can be reduced, and the structure of the junction box 2 can be simplified.

In another preferred embodiment, as shown in fig. 7, in the mounting area a of the junction box 2 in fig. 1, a reinforcement 5 is provided around the junction box housing 20 from the outside to restrict relative movement between the junction box 2 and the photovoltaic module 1. In yet another embodiment, the structure of the section C-C in fig. 7 is shown in fig. 8, where the reinforcement member 5 is configured as a channel shape as a whole, and includes two fixing walls 52 and supporting walls 53 that are respectively connected, and are fixedly connected to the surfaces on both sides of the housing 20 through the cooperation of the bayonet 51 and the bayonet 21, respectively, and the second supporting wall 54 extends along the outer surface 23 of the housing 20 away from the mounting surface 22 and is connected between the two supporting walls 53 so as to be connected as a whole. The support walls 53 are respectively abutted against the surfaces of the front glass 3 and the back glass 8, and bonded together by the adhesive 6. When the junction box is impacted by the direction from the front or back of the photovoltaic module, the reinforcing piece 5 can provide support for the junction box 2 and limit the relative movement between the junction box 2 and the photovoltaic cell panel 1, so that the impact resistance of the junction box 2 is improved. The support walls 53 on both sides are integrally connected, so that the number of parts can be reduced, and the structure of the junction box 2 can be simplified. At the same time, the outer reinforcement 5 can further provide protection for the front housing 20 from surface damage.

It will be appreciated that the embodiments of the present utility model are not limited to the descriptions of the figures and examples, for example, in some examples the second support wall 54 may be omitted, a plurality of smaller-sized reinforcing members 5 may be replaced by a single larger-sized reinforcing member, and the connection between the fixing wall 52 and the housing 20 may also be in the form of a pin connection, a bolt connection, an adhesive connection, or a snap connection.

The above-described embodiments are intended to explain the present utility model in further detail with reference to the figures so that those skilled in the art can understand the technical concept of the present utility model. Within the scope of the claims, the structural optimization or equivalent replacement of the parts involved, and the implementation of the different embodiments without any structural and principle conflicts, are all within the scope of the present utility model.

Claims (10)

1. The utility model provides a photovoltaic module terminal box, includes the terminal box casing, the terminal box casing is including being used for the installation face with the side butt joint of photovoltaic cell board, its characterized in that, the terminal box still includes the reinforcement, the reinforcement includes fixed wall and first supporting wall, fixed wall with terminal box casing fixed connection, first supporting wall with fixed wall links to each other and surpasses the installation face extends, in order to permit first supporting wall with the surface butt of photovoltaic cell board.

2. The photovoltaic module junction box of claim 1 wherein said junction box housing has a plurality of said stiffeners mounted thereto.

3. The photovoltaic module junction box according to claim 2, wherein the first support walls of the plurality of stiffeners are respectively abutted against front and back surfaces of the photovoltaic panel.

4. The photovoltaic module junction box according to claim 1 or 2, characterized in that the reinforcement further comprises a second support wall connected to the fixed wall or the first support wall and extending in the thickness direction of the photovoltaic panel along the housing surface.

5. The photovoltaic module junction box of claim 4 wherein said second support wall extends along said mounting face.

6. The junction box of photovoltaic modules according to claim 4, wherein the reinforcement member comprises two fixing walls and a first supporting wall, the two fixing walls and the first supporting wall are respectively connected to two sides of the junction box housing and are integrally connected through the second supporting wall, and the two first supporting walls are respectively abutted to the front surface and the back surface of the photovoltaic cell panel.

7. The photovoltaic module junction box of claim 6 wherein said stiffener is configured in an H-shape and said second support wall extends along said mounting face.

8. The photovoltaic module junction box according to claim 6, wherein the reinforcement is configured in a channel shape, and the second support wall is connected to the support wall and extends along a side away from the mounting surface.

9. A photovoltaic module comprising a photovoltaic panel and a junction box, wherein the junction box is the photovoltaic module junction box according to any one of claims 1 to 8, and the junction box is mounted on the side surface of the photovoltaic panel.

10. The photovoltaic module of claim 9, wherein the photovoltaic panel is bonded to the first support wall by silicone.