Junction box for photovoltaic module and photovoltaic module

Abstract

The utility model discloses a junction box used for a photovoltaic assembly and the photovoltaic assembly. The junction box used for the photovoltaic assembly comprises a housing, a control element and a sealing assembly. The control element is arranged in the shell; the sealing assembly is arranged in the shell and comprises a first sealing piece and a second sealing piece, the first sealing piece and the second sealing piece are sequentially arranged between the control element and the side wall of the shell, and the first sealing piece and the second sealing piece are different in water vapor transmittance. By arranging the first sealing element and the second sealing element in the shell, the first sealing element and the second sealing element form dual protection in the marine high-humidity, high-salt-mist and seawater corrosion environment, water vapor can be effectively prevented from permeating into the shell and the control element, the air tightness of the junction box is improved, the working environment of the junction box is improved, and the service life of the junction box is prolonged. The service life of the junction box is prolonged, the maintenance cost of the junction box is reduced, and the reliability and safety of the junction box are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, in particular to a junction box for a photovoltaic assembly and a photovoltaic assembly. Background Art

[0002] In the prior art, traditional junction boxes cannot prevent water vapor from entering the interior of the junction box. At the same time, water vapor can enter the interior of the photovoltaic laminate through the junction box, reducing the power generation of the photovoltaic module and affecting the safety and reliability of the photovoltaic module. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide a junction box for a photovoltaic module, which can improve the safety and reliability of the photovoltaic module.

[0004] A second object of the present invention is to provide a photovoltaic module, comprising a photovoltaic laminate and at least one junction box, wherein the junction box is the junction box for a photovoltaic module as described in any one of the embodiments of the first aspect.

[0005] According to the embodiment of the first aspect of the present invention, the junction box for photovoltaic modules includes: a shell, a control element and a sealing assembly, wherein the control element is arranged in the shell; the sealing assembly is arranged in the shell, and the sealing assembly includes a first seal and a second seal, wherein the first seal and the second seal are arranged in sequence between the control element and the side wall of the shell, and the water vapor permeability of the first seal and the second seal are different.

[0006] According to the junction box for photovoltaic modules according to the embodiment of the present invention, by arranging the first seal and the second seal in the shell, the first seal and the second seal form double protection in the high humidity, high salt fog and seawater corrosion environment at sea, which can effectively prevent water vapor from penetrating into the interior of the shell and the interior of the control element, thereby improving the airtightness of the junction box, improving the working environment of the junction box, extending the service life of the junction box, reducing the maintenance cost of the junction box, and improving the reliability and safety of the junction box.

[0007] In some embodiments, the water vapor permeability of the first seal is less than or equal to the water vapor permeability of the second seal; and / or the water vapor permeability of the first seal is K1, and K1 satisfies: 0<K1≤10g / m 2 .day; and / or, the water vapor permeability of the second sealing member is K2, and the K2 satisfies: 5g / m 2 .day≤K2≤50g / m 2 .day.

[0008] In some embodiments, the first sealing member is butyl rubber or modified polyurethane; and / or the second sealing member is organic silicone, epoxy resin, polyurethane or acrylic.

[0009] In some embodiments, the first seal is arranged adjacent to the control element, and the second seal is arranged on a side of the first seal away from the control element; or, the second seal is arranged adjacent to the control element, and the first seal is arranged on a side of the second seal away from the control element.

[0010] In some embodiments, the gram weight of the first sealing member is G1, and G1 satisfies: 2g≤G1≤20g, and / or the gram weight of the second sealing member is G2, and G2 satisfies: 5g≤G2≤40g.

[0011] In some embodiments, the control element includes: a control board, which is connected to the shell; at least one diode, which is arranged on a side of the control board adjacent to the sealing assembly, and the height of the diode along the thickness direction of the control board is H1, and the height of one of the first seal and the second seal adjacent to the control board along the thickness direction of the control board is H2, and H1 and H2 satisfy: 2mm≤H2-H1≤10mm.

[0012] In some embodiments, the shell is formed with a connecting surface, and at least one third seal is provided on the connecting surface. The third seal extends along the circumference of the shell, and the water vapor transmission rate of the third seal is K3, and K3 satisfies: 0<K3≤10g / m 2 .day.

[0013] In some embodiments, the junction box for a photovoltaic module further includes: a fourth seal, which is arranged on the outer side of the third seal along the circumference of the connection surface; and / or the fourth seal is arranged on the inner side of the third seal along the circumference of the connection surface.

[0014] In some embodiments, at least one of the third sealing member and the fourth sealing member is butyl rubber or modified polyurethane.

[0015] According to the second aspect of the present invention, the photovoltaic module comprises: a photovoltaic laminate and at least one junction box, wherein the junction box is arranged on the back side of the photovoltaic laminate, the junction box is electrically connected to the photovoltaic laminate, and the junction box is the junction box for the photovoltaic module as described in any one of the first aspect embodiments.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic diagram of a perspective of an embodiment according to the first aspect of the present utility model;

[0019] Figure 2 is a schematic diagram of another perspective of an embodiment according to the first aspect of the present utility model;

[0020] Figure 3 It is a schematic diagram of a photovoltaic laminate according to an embodiment of the second aspect of the present utility model.

[0021] Reference numerals:

[0022] 100, junction box;

[0023] 10. Housing; 11. Connecting surface; 12. Third sealing member; 13. Fourth sealing member;

[0024] 20. Control elements;

[0025] 30. Sealing assembly; 31. First sealing member; 32. Second sealing member;

[0026] 40. Photovoltaic laminate; 41. Busbar outlet. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 3 A junction box 100 for a photovoltaic module according to an embodiment of the present invention is described. The junction box 100 for a photovoltaic module includes: a housing 10 , a control element 20 and a sealing assembly 30 .

[0028] Specifically, if Figure 1 As shown, the control element 20 is arranged in the shell 10; the sealing assembly 30 is arranged in the shell 10, and the sealing assembly 30 includes a first seal 31 and a second seal 32. The first seal 31 and the second seal 32 are arranged in sequence between the control element 20 and the side wall of the shell 10, and the water vapor permeability of the first seal 31 and the second seal 32 is different.

[0029] Specifically, the control element 20 is disposed at the bottom of the housing 10, and the sealing assembly 30 covers the control element 20 along the height direction of the photovoltaic module junction box 100. The control element 20 is adapted to control the operation of the photovoltaic module junction box 100, and the sealing assembly 30 is adapted to potting the control element 20. In this embodiment, the first and second sealing members 31, 32 are sequentially disposed based on their different water vapor transmission rates.

[0030] According to the junction box 100 for photovoltaic modules according to the embodiment of the present invention, by arranging the first seal 31 and the second seal 32 in the shell 10, in the high humidity, high salt fog, and seawater corrosion environment at sea, the first seal 31 and the second seal 32 form double protection, which can effectively prevent water vapor from penetrating into the interior of the shell 10 and the interior of the control element 20, thereby improving the airtightness of the junction box 100, improving the working environment of the junction box 100, extending the service life of the junction box 100, reducing the maintenance cost of the junction box 100, and improving the reliability and safety of the junction box 100.

[0031] According to some embodiments of the present invention, the water vapor permeability of the first seal 31 is less than or equal to the water vapor permeability of the second seal 32; or the water vapor permeability of the first seal 31 is K1, and K1 satisfies: 0<K1≤10g / m 2 .day; or, the water vapor permeability of the second sealing member 32 is K2, K2 satisfies: 5g / m 2 .day≤K2≤50g / m 2 .day; or, the water vapor permeability of the first sealing member 31 is K1, K1 satisfies: 0<K1≤10g / m 2 .day, at the same time, the water vapor permeability of the second sealing member 32 is K2, K2 meets: 5g / m 2 .day≤K2≤50g / m 2 .day.

[0032] When the water vapor transmission rate of the first sealing member 31 is greater than 10 g / m 2 .day, the water vapor permeability of the first sealing member 31 is relatively high, which may cause water vapor to penetrate into the junction box 100 for the photovoltaic module, thereby reducing the safety and reliability of the junction box 100. For example, K1=5g / m 2 .day.

[0033] When the water vapor transmission rate of the second sealing member 32 is less than 5 g / m 2 When the water vapor transmission rate of the second sealing member 32 is low, the control element 20 in the housing 10 may not be able to dissipate heat when working. When the water vapor transmission rate of the second sealing member 32 is greater than 50 g / m 2.day, the water vapor permeability of the second sealing member 32 is relatively high, which may cause water vapor to penetrate into the junction box 100 for the photovoltaic module, thereby reducing the safety and reliability of the junction box 100. For example, K2=20g / m 2 .day.

[0034] Therefore, the water vapor permeability of the first seal 31 is less than or equal to the water vapor permeability of the second seal 32, and the range of the water vapor permeability of the first seal 31 and the second seal 32 is limited, which can improve the airtightness of the junction box 100, prevent the control element 20 inside the shell 10 from being corroded by seawater, and prevent the junction box 100 from leaking electricity, thereby effectively improving the safety and reliability of the junction box 100.

[0035] According to some embodiments of the present invention, the first sealing member 31 is butyl rubber or modified polyurethane; or, the second sealing member 32 is organic silicone, epoxy resin, polyurethane or acrylic acid; or the first sealing member 31 is butyl rubber or modified polyurethane, and at the same time, the second sealing member 32 is organic silicone, epoxy resin, polyurethane or acrylic acid.

[0036] The first sealing member 31 is butyl rubber or modified polyurethane, that is, the first sealing member 31 is a low water permeability potting glue. Meanwhile, the second sealing member 32 is organic silicone, epoxy resin, polyurethane or acrylic, that is, the second sealing member 32 is a normal potting glue.

[0037] Therefore, the first sealing member 31 is butyl rubber or modified polyurethane; or, the second sealing member 32 is organic silicone, epoxy resin, polyurethane or acrylic acid; or the first sealing member 31 is butyl rubber or modified polyurethane, and at the same time, the second sealing member 32 is organic silicone, epoxy resin, polyurethane or acrylic acid, which facilitates improving the connection strength between the control element 20 and the shell 10, while improving the airtightness of the junction box 100 for the photovoltaic module, and improving the safety and reliability of the junction box 100.

[0038] According to some embodiments of the present invention, Figure 1 As shown, the first seal 31 is arranged adjacent to the control element 20, and the second seal 32 is arranged on the side of the first seal 31 away from the control element 20; or, the second seal 32 is arranged adjacent to the control element 20, and the first seal 31 is arranged on the side of the second seal 32 away from the control element 20.

[0039] In this embodiment, the first sealing member 31 is provided on the control element 20 on a side adjacent to the control element 20 along the height direction of the junction box 100, and the second sealing member 32 is provided on the other side of the first sealing member 31 away from the control element 20 on a side adjacent to the first sealing member 31 along the height direction of the junction box 100.

[0040] Optionally, the second seal 32 may be provided on the control element 20 adjacent to the control element 20 along the height direction of the junction box 100, and the first seal 31 may be provided on the other side of the second seal 32 away from the control element 20 adjacent to the second seal 32 along the height direction of the junction box 100.

[0041] Therefore, the first seal 31 is arranged adjacent to the control element 20, and the second seal 32 is arranged on the side of the first seal 31 away from the control element 20; or, the second seal 32 is arranged adjacent to the control element 20, and the first seal 31 is arranged on the side of the second seal 32 away from the control element 20. When a small amount of water vapor passes through the second seal 32, the first seal 31 can perform a secondary blocking of the small amount of water vapor, effectively preventing the control element 20 from being corroded by water vapor, ensuring the normal operation of the control element 20, and extending the service life of the control element 20.

[0042] According to some embodiments of the present invention, the gram weight of the first sealing component 31 is G1, and G1 satisfies: 2g≤G1≤20g, or, the gram weight of the second sealing component 32 is G2, and G2 satisfies: 5g≤G2≤40g, or, the gram weight of the first sealing component 31 is G1, and G1 satisfies: 2g≤G1≤20g, and at the same time, the gram weight of the second sealing component 32 is G2, and G2 satisfies: 5g≤G2≤40g.

[0043] When the weight of the first seal 31 is less than 2g, the weight of the first seal 31 is too small, resulting in a small thickness of the first seal 31 along the height direction of the junction box 100, and the first seal 31 is easily damaged. When the weight of the first seal 31 is greater than 20g, the weight of the first seal 31 is too large, which may cause the control element 20 to be severely squeezed, and increase the cost of the sealing assembly 30. For example, G1 = 10g.

[0044] When the gram weight of the second seal 32 is less than 5g, the gram weight of the second seal 32 is relatively small, resulting in a relatively small thickness of the second seal 32 along the height direction of the junction box 100 and a relatively low structural strength of the second seal 32. When the gram weight of the second seal 32 is greater than 40g, the gram weight of the first seal 31 is relatively large, which may increase the overall weight of the junction box 100 and the cost of the sealing assembly 30. For example, G2 = 20g.

[0045] In this embodiment, the gram weight of the first sealing member 31 is G1, and G1 satisfies: 2g≤G1≤20g. Meanwhile, the gram weight of the second sealing member 32 is G2, and G2 satisfies: 5g≤G2≤40g.

[0046] Thus, the gram weight range of the first seal 31 and the gram weight range of the second seal 32 are limited. While ensuring that the first seal 31 and the second seal 32 seal the junction box 100 normally, the control element 20 can be prevented from being severely squeezed, the cost of the sealing assembly 30 can be reduced, and at the same time, the weight of the junction box 100 can be reduced, realizing a lightweight design of the junction box 100.

[0047] According to some embodiments of the present invention, the control element 20 includes: a control board, which is connected to the housing 10; at least one diode, which is arranged on a side of the control board adjacent to the sealing assembly 30, and the height of the diode along the thickness direction of the control board is H1. The height of one of the first seal 31 and the second seal 32 adjacent to the control board along the thickness direction of the control board is H2, and H1 and H2 satisfy: 2mm≤H2-H1≤10mm.

[0048] That is, the control board is connected to the bottom of the housing 10 , and the diode is arranged above the control board along the height direction of the junction box 100 . In this embodiment, the first sealing member 31 is adjacent to the control board.

[0049] When the height difference between the first seal 31 along the thickness direction of the control board, that is, the height direction of the junction box 100, and the height of the diode along the thickness direction of the control board is less than 2 mm, the height of the first seal 31 along the thickness direction of the control board is relatively small, which may cause some water vapor to enter the control board through the first seal 31; when the height difference between the first seal 31 along the thickness direction of the control board, that is, the height direction of the junction box 100, and the height of the diode along the thickness direction of the control board is greater than 10 mm, the height of the first seal 31 along the thickness direction of the control board is relatively large, which may cause the first seal 31 to occupy a larger internal space of the shell 10, so that the height of the second seal 32 along the thickness direction of the control board is relatively low, affecting the sealing performance of the second seal 32.

[0050] Thus, by limiting the height difference range between the height of the first seal 31 along the thickness direction of the control board, that is, the height direction of the junction box 100, and the height of the diode along the thickness direction of the control board, the usage of the first seal 31 and the second seal 32 can be controlled within a reasonable range, thereby improving the airtightness and reliability of the junction box 100 while reducing the production cost of the junction box 100.

[0051] According to some embodiments of the present invention, Figure 2 As shown, the housing 10 is formed with a connecting surface 11, and at least one third sealing member 12 is provided on the connecting surface 11. The third sealing member 12 extends along the circumference of the housing 10, and the water vapor transmission rate K3 of the third sealing member 12 satisfies: 0<K3≤10g / m 2 .day.

[0052] That is, the housing 10 is formed with a connection surface 11 on one side away from the control element 20 along the height direction of the junction box 100. The third sealing member 12 is arranged along the circumference of the connection surface 11. When the water vapor transmission rate of the third sealing member 12 is greater than 10 g / m 2 During the day, water vapor may penetrate from the connection surface 11 into the interior of the housing 10, thereby affecting the working effect of the control element 20. For example, K3 = 5g / m 2 .day.

[0053] In this embodiment, the third sealing member 12 may be made of butyl rubber or modified polyurethane.

[0054] Therefore, limiting the range of the water vapor permeability of the third seal 12 can prevent water vapor from penetrating from the connection surface 11 into the interior of the housing 10, prevent the control element 20 from being corroded by water vapor, extend the service life of the control element 20, and at the same time further improve the airtightness and reliability of the junction box 100.

[0055] According to some embodiments of the present invention, Figure 2 As shown, the junction box 100 for a photovoltaic module further includes: a fourth seal 13, which is arranged on the outer peripheral side of the third seal 12 along the circumference of the connecting surface 11; or, the fourth seal 13 is arranged on the inner peripheral side of the third seal 12 along the circumference of the connecting surface 11, or, the fourth seal 13 is arranged on the outer peripheral side of the third seal 12 along the circumference of the connecting surface 11, and at the same time, the fourth seal 13 is arranged on the inner peripheral side of the third seal 12 along the circumference of the connecting surface 11.

[0056] In this embodiment, the fourth seal 13 is arranged on the outer peripheral side of the third seal 12 along the circumference of the connecting surface 11. The fourth seal 13 can be organic silicone, epoxy resin, polyurethane or acrylic. The third seal 12 is suitable for sealing the connecting surface 11 of the junction box 100, and the fourth seal 13 is suitable for bonding the connecting surface 11 of the junction box 100 to the photovoltaic laminate 40.

[0057] Therefore, the fourth seal 13 is arranged on the outer peripheral side of the third seal 12 along the circumference of the connecting surface 11, which can improve the connection strength and reliability between the junction box 100 and the photovoltaic laminate 40, improve the airtightness of the junction box 100 and the photovoltaic laminate 40, extend the service life of the junction box 100 and the photovoltaic laminate 40, and at the same time, reduce the cost of the third seal 12.

[0058] According to some embodiments of the present invention, at least one of the third sealing member 12 and the fourth sealing member 13 is made of butyl rubber or modified polyurethane.

[0059] In this embodiment, the third sealant 12 is made of butyl rubber or modified polyurethane, and the fourth sealant 13 is made of organic silicone, epoxy resin, polyurethane, or acrylic. Therefore, at least one of the third and fourth sealants 12, 13, being made of butyl rubber or modified polyurethane, can improve the sealing and reliability between the junction box 100 and the photovoltaic laminate 40, prevent moisture from entering the junction box 100 and the photovoltaic laminate 40, extend the service life of the junction box 100 and the photovoltaic laminate 40, and reduce the impact of corrosion of the junction box 100 and the photovoltaic laminate 40 on power generation.

[0060] According to the photovoltaic assembly of the second embodiment of the present invention, Figure 3 As shown; comprising: a photovoltaic laminate 40 and at least one junction box 100, the junction box 100 is provided on the back of the photovoltaic laminate 40, the junction box 100 is electrically connected to the photovoltaic laminate 40, and the junction box 100 is any one of the junction boxes 100 for photovoltaic modules in the above-mentioned first aspect embodiment.

[0061] In this embodiment, after the busbar outlet 41 formed on the back side of the photovoltaic laminate 40 is sealed using the third sealant 12, the third sealant 12 is arranged on the circumference of the connection surface 11 of the junction box 100, and the fourth sealant 13 is arranged on the outer peripheral side of the third sealant 12, and then the photovoltaic laminate 40 is bonded to the connection surface 11 of the junction box 100, and then the busbar of the photovoltaic laminate 40 is welded to the control element 20 in the junction box 100 to achieve electrical connection between the photovoltaic laminate 40 and the junction box 100, and then the first sealant 31 covers the control element 20 to encapsulate the control element 20, and then the second sealant 32 covers the first sealant 31 to encapsulate the junction box 100, which effectively improves the sealing of the photovoltaic module, extends the service life of the photovoltaic module, ensures the normal operation of the photovoltaic module, reduces maintenance costs, and improves the safety and reliability of the photovoltaic module.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0063] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may also include the first and second features not being in direct contact but being in contact via another feature between them. In the description of the present invention, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0064] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0065] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A junction box for a photovoltaic module, characterized in that: include: case; a control element, the control element being disposed in the housing; A sealing assembly is arranged in the shell, and the sealing assembly includes a first seal and a second seal. The first seal and the second seal are arranged in sequence between the control element and the side wall of the shell, and the water vapor permeability of the first seal and the second seal is different.

2. The junction box for photovoltaic modules according to claim 1, characterized in that: The water vapor transmission rate of the first sealing member is less than or equal to the water vapor transmission rate of the second sealing member; and / or, The water vapor permeability of the first sealing member is K1, and K1 satisfies: 0<K1≤10g / m 2 .day; and / or, The water vapor permeability of the second sealing member is K2, and the K2 satisfies: 5g / m 2 .day≤K2≤50g / m 2 .day.

3. The junction box for photovoltaic modules according to claim 2, characterized in that: The first sealing member is butyl rubber or modified polyurethane; and / or, The second sealing member is made of organic silicone, epoxy resin, polyurethane or acrylic acid.

4. The junction box for photovoltaic modules according to claim 2, characterized in that: The first sealing member is disposed adjacent to the control element, and the second sealing member is disposed on a side of the first sealing member away from the control element; or, The second sealing member is disposed adjacent to the control element, and the first sealing member is disposed on a side of the second sealing member away from the control element.

5. The junction box for photovoltaic modules according to claim 2, characterized in that: The first sealing member has a gram weight of G1, and G1 satisfies: 2g≤G1≤20g, and / or, The gram weight of the second sealing member is G2, and G2 satisfies: 5g≤G2≤40g.

6. The junction box for photovoltaic modules according to claim 2, characterized in that: The control element includes: a control panel connected to the housing; At least one diode is provided on a side of the control board adjacent to the sealing assembly, the height of the diode along the thickness direction of the control board is H1, the height of one of the first sealing member and the second sealing member adjacent to the control board along the thickness direction of the control board is H2, and H1 and H2 satisfy: 2mm≤H2-H1≤10mm.

7. The junction box for a photovoltaic module according to any one of claims 1 to 6, characterized in that: The housing is formed with a connecting surface, and at least one third sealing member is provided on the connecting surface. The third sealing member extends along the circumference of the housing. The water vapor transmission rate K3 of the third sealing member satisfies: 0<K3≤10g / m 2 .day.

8. The junction box for photovoltaic modules according to claim 7, characterized in that: Also includes: Fourth seal, The fourth sealing member is provided on the outer peripheral side of the third sealing member along the circumferential direction of the connection surface; and / or, The fourth sealing member is provided on an inner circumferential side of the third sealing member along a circumferential direction of the connecting surface.

9. The junction box for a photovoltaic module according to claim 8, characterized in that: At least one of the third sealing member and the fourth sealing member is made of butyl rubber or modified polyurethane.

10. A photovoltaic module, characterized in that: include: photovoltaic laminates; At least one junction box is provided on the back of the photovoltaic laminate, the junction box is electrically connected to the photovoltaic laminate, and the junction box is the junction box for a photovoltaic module according to any one of claims 1 to 9.

Images