Photovoltaic junction box, photovoltaic module, electric device and power generation device

Abstract

The application relates to a photovoltaic junction box, a photovoltaic module, a power utilization device and a power generation device. A first sealing part is arranged on the side of the base away from the cavity, and at least part of the first sealing part is arranged around the outer periphery of the through hole. In this way, when the base is mounted on the module body of the photovoltaic module through the first sealing part, the outgoing line of the photovoltaic module passes through the through hole and is electrically connected with the photovoltaic junction box. At this time, the first sealing part is arranged around the outer periphery of the outgoing line, so that the transmission probability of water vapor between the photovoltaic junction box and the module body is reduced. Meanwhile, the second sealing part is filled in the cavity. Through the second sealing part, the outgoing line is effectively fixed, and the probability of water vapor transmission to the outgoing line along the height direction of the surrounding shell is reduced. Therefore, through the first sealing part and the second sealing part, water vapor in different directions of the outgoing line can be blocked, the water resistance distance is effectively increased, the water resistance performance is improved, the corrosion probability of the photovoltaic module is reduced, and the stability of the module is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of solar cells, in particular to a photovoltaic junction box, a photovoltaic module, a power consumption device and a power generation device. BACKGROUND

[0002] The junction box is an important part of the photovoltaic module, and is a core component for communicating the inside and outside of the module and effectively leading out electric energy. However, due to the structural design of the traditional junction box, the water blocking performance of the junction box is insufficient, which easily leads to corrosion in the photovoltaic module, affecting the stability of the photovoltaic module. CONTENT OF THE UTILITY MODEL

[0003] Therefore, it is necessary to provide a photovoltaic junction box, a photovoltaic module, a power consumption device and a power generation device to improve the water blocking performance, reduce the corrosion probability of the photovoltaic module, and improve the stability of the module.

[0004] In a first aspect, the present application provides a photovoltaic junction box, which comprises: a shell comprising a base and a surrounding shell, the surrounding shell being arranged on the base and enclosing a cavity, and the base being provided with a through hole communicating with the cavity; a blocking structure comprising a first blocking part and a second blocking part, the first blocking part being arranged on a side of the base away from the cavity and at least partially surrounding the outer periphery of the through hole, and the second blocking part being filled in the cavity.

[0005] The photovoltaic junction box described above is provided with the first blocking part on the side of the base away from the cavity, and at least part of the first blocking part is arranged around the outer periphery of the through hole. In this way, when the base is installed on the module body of the photovoltaic module through the first blocking part, the lead-out wire of the photovoltaic module passes through the through hole and is electrically connected with the photovoltaic junction box. At this time, the first blocking part surrounds the outer periphery of the lead-out wire, reducing the probability of water vapor transmission between the photovoltaic junction box and the module body. At the same time, the second blocking part is filled in the cavity, and through the second blocking part, the lead-out wire is effectively fixed, and the probability of water vapor transmission to the lead-out wire along the height direction of the surrounding shell is also reduced. Therefore, by means of the first blocking part and the second blocking part, water vapor in different directions of the lead-out wire can be blocked, the water blocking distance is effectively increased, the water blocking performance is improved, the corrosion probability of the photovoltaic module is reduced, and the stability of the module is improved.

[0006] In some embodiments, the minimum distance between the circumferential edge of the base and the circumferential edge of the through hole is denoted as D1, where D1≥10.9mm. By designing the minimum distance D1 to be greater than or equal to 10.9mm, the water blocking distance on the base is reasonably controlled, the water blocking performance of the photovoltaic junction box is improved, and the stability of the module is improved.

[0007] In some embodiments, the minimum distance D1 also satisfies: 10.9mm≤D1≤30mm. In this way, the minimum distance D1 is further controlled to be 10.9mm-30mm, so as to control the overall size of the junction box as much as possible while meeting the effective water-blocking stroke.

[0008] In some embodiments, the base is configured as a circular structure, the through hole is configured as a circular hole, and the through hole is concentrically arranged with the base. In this way, the base and the through hole are both designed to be circular, which not only helps to improve the water-blocking effect, but also makes the heat dissipation stroke between the base and the through hole consistent, which is conducive to achieving uniform heat dissipation. In addition, the circular design of the base facilitates the filling of the circumferential edge of the base by the first sealing part, thereby improving the reliability of the structure.

[0009] In some embodiments, the shell further comprises an inner liner, the inner liner surrounds the outer periphery of the through hole and separates the cavity into a first sub-cavity in communication with the through hole and a second sub-cavity surrounding the first sub-cavity, and the first sub-cavity and the second sub-cavity are both filled with a second sealing part. In this way, the inner liner is arranged inside the shell to form a protective structure for the outer periphery of the through hole, which is conducive to improving the water-blocking capability.

[0010] In some embodiments, the height of the first sub-cavity is h, and h≥10.9mm. In this way, the height of the first sub-cavity is controlled to be greater than or equal to 10.9mm, which reasonably controls the water-blocking stroke of the junction box in the height direction and improves the water-blocking performance of the photovoltaic junction box, thereby improving the stability of the module.

[0011] In some embodiments, the height h also satisfies: 10.9mm≤h≤50mm. In this way, the height is further controlled to be 10.9mm-50mm, so as to control the overall height of the junction box as much as possible while meeting the effective water-blocking stroke.

[0012] In some embodiments, the minimum distance between the inner liner and the shell is D2, and D2≥10.9mm. In this way, the minimum distance D2 is controlled to be greater than or equal to 10.9mm, which reasonably controls the radial water-blocking stroke of the photovoltaic junction box and improves the water-blocking performance of the photovoltaic junction box, thereby improving the stability of the module.

[0013] In some embodiments, the minimum distance D2 also satisfies: 10.9mm≤D2≤30mm. In this way, the minimum distance D2 is further controlled to be 10.9mm-30mm, so as to control the overall size of the junction box as much as possible while meeting the effective water-blocking stroke.

[0014] In some embodiments, the photovoltaic junction box further comprises a wire, the wire penetrates the enclosure and the inner liner, and the wire at one end of the first split cavity comprises a connecting end for electrically connecting with the lead-out wire of the photovoltaic module. In this way, the wire is penetrated on the enclosure and the inner liner, which facilitates the electrical connection between the wire and the lead-out wire, and improves the installation convenience of the photovoltaic junction box. At the same time, it is also convenient to stably support the wire and improve the stability of the structure.

[0015] In some embodiments, the wire comprises at least two, each wire penetrates the enclosure and the inner liner, and is sequentially distributed along the circumference of the through hole. In this way, the positions of the plurality of wires are reasonably distributed, which facilitates the electrical connection between each wire and the lead-out wire, and facilitates the electrical connection operation of the photovoltaic junction box.

[0016] In some embodiments, the enclosure and the inner liner are both configured as a cylindrical ring structure. In this way, the enclosure and the inner liner are both designed as a cylindrical ring structure, which facilitates the infiltration of the second sealing part in the first split cavity and the second split cavity, reduces the generation of air bubbles during filling, and improves the stability of the structure.

[0017] In some embodiments, the first sealing part and / or the second sealing part are configured as butyl rubber or silicone rubber. In this way, at least one of the first sealing part and the second sealing part is designed as butyl rubber or silicone rubber, which facilitates the improvement of the water blocking effect.

[0018] In some embodiments, the photovoltaic junction box further comprises a cover, the cover is arranged at one end of the enclosure away from the base. In this way, the cover is introduced to keep the cavity in a closed state, which is conducive to further improving the water blocking performance of the photovoltaic junction box.

[0019] In a second aspect, the present application provides a photovoltaic module, the photovoltaic module comprising: a module body, a lead-out wire penetrating out of the surface of the module body; the photovoltaic junction box of any one of the above, the base being arranged on the surface of the module body through the first sealing part, and the lead-out wire being arranged in the through hole and electrically connected with the photovoltaic junction box.

[0020] In this way, through the first sealing part and the second sealing part, the water vapor in different directions of the lead-out wire can be blocked, the water blocking distance is effectively increased, the water blocking performance is improved, the corrosion probability of the photovoltaic module is reduced, and the stability of the module is improved.

[0021] In a third aspect, the present application provides an electric device, the electric device comprising the photovoltaic module.

[0022] In a fourth aspect, the present application provides a power generation device, the power generation device comprising the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The structural schematic diagram of the photovoltaic junction box described in some embodiments of the present application.

[0024] Figure 2 Structure diagram of a photovoltaic junction box filled with a second sealing part as described in some embodiments of the present application.

[0025] Figure 3 Structure diagram of a photovoltaic junction box provided with a first sealing part as described in some embodiments of the present application.

[0026] Figure 4 Structure sectional view of a photovoltaic module as described in some embodiments of the present application.

[0027] Figure 5 Structure sectional view of a photovoltaic junction box as described in some embodiments of the present application.

[0028] Figure 6 Structure diagram of a photovoltaic junction box with a cover as described in some embodiments of the present application.

[0029] Figure 7 Structure diagram of a photovoltaic module as described in some embodiments of the present application.

[0030] 100, photovoltaic junction box; 10, base; 11, through hole; 20, enclosure; 30, inner liner; 40, cavity; 41, first sub-cavity; 42, second sub-cavity; 50, wire; 51, connecting end; 60, cover; 70, first sealing part; 80, second sealing part; 200, module body; 210, lead-out hole; 220, lead-out wire; X, height direction. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second", and the like, if any appear in the description, are used for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless otherwise explicitly specified and limited, if the first feature is described as "on" or "under" the second feature or similar, it can mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be the first feature directly above or obliquely above the second feature, or only indicate that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be the first feature directly below or obliquely below the second feature, or only indicate that the first feature is lower than the second feature in horizontal height.

[0036] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and do not represent the only implementation.

[0037] With the rapid development of science and technology, new energy development has made breakthroughs, such as: represented by perovskite, organic thin film battery solar cell has made a revolutionary progress, and this kind of solar cell is expected to become the mainstream product in solar cell because of its high efficiency, low cost and other advantages.

[0038] In a photovoltaic module, in order to realize electrical connection with external equipment, a photovoltaic junction box is generally arranged on the module body of the photovoltaic module. The surface of the module body is provided with an outlet hole to facilitate the outlet of the outlet wire in the module body, so that the outlet wire is electrically connected with the photovoltaic junction box. In the installation of the traditional photovoltaic junction box, the outlet hole is usually blocked by a blocking material, and then the shell is fixed on the module body. However, the water blocking stroke of this structure design is relatively short, which can easily cause water vapor to transfer between the module body and the photovoltaic junction box, or from the inside of the photovoltaic junction box to the outlet wire, thereby causing water vapor to enter the module body and corrode the internal structure of the photovoltaic module, affecting the reliability of the module.

[0039] Therefore, in order to solve the problem of insufficient water blocking performance of the traditional photovoltaic junction box and affect the stability of the photovoltaic module, the present application provides a photovoltaic junction box. A first blocking part is arranged on the side of the base away from the cavity, and at least part of the first blocking part is arranged around the outer periphery of the through hole. In this way, when the base is installed on the module body of the photovoltaic module through the first blocking part, the outlet wire of the photovoltaic module passes through the through hole and is electrically connected with the photovoltaic junction box. At this time, the first blocking part surrounds the outer periphery of the outlet wire, reducing the probability of water vapor transfer between the photovoltaic junction box and the module body. At the same time, the second blocking part is filled in the cavity. Through the second blocking part, the outlet wire is effectively fixed, and the probability of water vapor transfer to the outlet wire along the height direction of the enclosure is also reduced. Therefore, by the first blocking part and the second blocking part, water vapor in different directions of the outlet wire can be blocked, the water blocking stroke is effectively increased, the water blocking performance is improved, the corrosion probability of the photovoltaic module is reduced, and the stability of the module is improved.

[0040] It should be noted that the module body refers to a component in the photovoltaic module that converts light energy into electrical energy, which includes a functional layer group and a packaging structure. For ease of understanding, taking a perovskite solar cell module as an example, the functional layer group of the module body can include a base glass, a transparent conductive layer, an electron transport layer, a perovskite layer, a hole transport layer, and a metal electrode. The packaging structure can include a glass cover plate, an adhesive film, and a copper strip. In the packaging process, a copper strip is attached to each of the positive and negative electrodes of the photovoltaic module, and one end of each copper strip is extended out; then the adhesive film and the glass cover plate are sequentially covered, so that the extended end of the copper strip passes out of the adhesive film and the glass cover plate to serve as the outlet wire of the photovoltaic module.

[0041] The present application provides a power consumption device using a battery as a power source. The power consumption device can be, but is not limited to, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric car, an electric automobile, a ship, a spacecraft, a space station, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc.

[0042] According to some embodiments of the present application, referring to Figures 1 to 3 The present application provides a photovoltaic junction box 100, which comprises a shell and a sealing structure. The shell comprises a base 10 and a surrounding shell 20, the surrounding shell 20 is arranged on the base 10 and encloses a cavity 40, and the base 10 is provided with a through hole 11 communicating with the cavity 40. The sealing structure comprises a first sealing part 70 and a second sealing part 80, the first sealing part 70 is arranged on the side of the base 10 away from the cavity 40 and at least partially surrounds the outer periphery of the through hole 11, and the second sealing part 80 is filled in the cavity 40.

[0043] The base 10 refers to the structure of the shell which is attached to or faces the component body 200 of the photovoltaic module. When the base 10 is installed on the component body 200, the through hole 11 on the base 10 needs to be opposite to the lead-out hole 210 on the component body 200, so that the lead-out wire 220 of the photovoltaic module can pass through the through hole 11 and enter the inside of the surrounding shell 20. The surrounding shell 20 is arranged on the base 10 and can enclose a cavity 40, which can be used to accommodate electrical elements of the photovoltaic junction box 100, such as diodes, resistors, etc. The surrounding shell 20 can be arranged on the base 10 in an assembly manner, such as but not limited to clamping, bolt connection, bonding, welding, etc. Of course, the surrounding shell 20 can also be an integrated structure with the base 10, such as being integrally formed with the base 10 by injection molding, die casting, extrusion, etc.

[0044] The first sealing part 70 is arranged on the side of the base 10 away from the cavity 40, referring to Figure 4 When the base 10 is installed on the component body 200, since the first sealing part 70 is wound around the outer periphery of the through hole 11, the first sealing part 70 not only seals between the base 10 and the component body 200, but also seals around the circumference of the lead-out wire 220. At the same time, when the first sealing part 70 is extruded between the base 10 and the component body 200, the first sealing part 70 can also be stretched under the action of extrusion, so that the filling area of the first sealing part 70 on the base 10 becomes larger. For example, the first sealing part 70 extends to the inside of the through hole 11. The component body 200 refers to the part in the photovoltaic module that converts light energy into electrical energy, which includes a functional layer group and a packaging structure. The specific structure can be referred to the above description and will not be repeated here.

[0045] The second sealing part 80 is filled in the cavity 40 and can seal the inside of the surrounding shell 20, so as to block the external water vapor from entering the cavity 40, thereby limiting the water vapor from transmitting along the height direction X of the surrounding shell 20 to the lead-out wire 220 to corrode the inside of the photovoltaic module.

[0046] It should be noted that the materials of the first sealing part 70 and the second sealing part 80 can be the same or different. Meanwhile, the materials of the first sealing part 70 and the second sealing part 80 can be selected in various ways, as long as they can meet the requirement of having certain sealing performance. For example, the materials of the first sealing part 70 and the second sealing part 80 can be, but are not limited to, butyl rubber.

[0047] Therefore, by the first sealing part 70 and the second sealing part 80, water vapor in different directions of the lead-out wire 220 can be blocked, the water-blocking distance is effectively increased, the water-blocking performance is improved, the corrosion probability of the photovoltaic module is reduced, and thus the stability of the module is improved.

[0048] According to some embodiments of the present application, optionally, please refer to Figure 3 The minimum value of the distance between the circumferential edge of the base 10 and the circumferential edge of the through hole 11 is denoted as D1, where D1≥10.9 mm.

[0049] The circumferential edge of the base 10 refers to the edge portion around the outer periphery of the base 10. For example, when the base 10 has a square structure, the circumferential edge of the base 10 is a square edge. When the base 10 has a circular structure, the circumferential edge of the base 10 is a circular edge. Similarly, the circumferential edge of the through hole 11 refers to the edge portion around the outer periphery of the through hole 11.

[0050] The distance between the circumferential edge of the base 10 and the circumferential edge of the through hole 11 can affect the water-blocking distance on the base 10. If the distance between them is designed to be too small, water vapor at the circumferential edge of the base 10 can easily enter the through hole 11 and be transmitted to the lead-out wire 220 located in the through hole 11, affecting the water-blocking effect. Therefore, in the present embodiment, the minimum value D1 of the distance is controlled to be greater than or equal to 10.9 mm, such as but not limited to 10.9 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, etc.

[0051] Of course, in some embodiments, the minimum value D1 of the distance can also be limited to within 30 mm, for example, the minimum value D1 of the distance also satisfies: 10.9 mm≤D1≤30 mm. By designing the minimum value D1 of the distance to be further controlled to be within 10.9 mm to 30 mm, the area size of the base 10 is reduced under the condition of meeting the effective water-blocking distance. In this way, not only the cost is saved, but also the bonding area between the base 10 and the module body 200 is reduced, thereby facilitating the reduction of the influence of the working heat of the photovoltaic junction box 100 on the module body 200.

[0052] By designing the minimum value D1 of the distance to be greater than or equal to 10.9 mm, the water-blocking distance on the base 10 is reasonably controlled, the water-blocking performance of the photovoltaic junction box 100 is improved, and thus the stability of the module is improved.

[0053] According to some embodiments of the present application, as shown in Figure 3 The base 10 is designed as a circular structure, and the through hole 11 is designed as a circular hole, and the base 10 and the through hole 11 are concentrically arranged.

[0054] The base 10 is designed as a circular structure, and the through hole 11 is designed as a circular hole, and the base 10 and the through hole 11 are concentrically arranged. The spacing between the circumferential edge of the base 10 and the circumferential edge of the through hole 11 is consistent, so that the water blocking distance on the base 10 is consistent, which is beneficial to improve the water blocking effect. At the same time, the heat dissipation distance between the circumferential edge of the base 10 and the circumferential edge of the through hole 11 is also consistent, so that the heat at the through hole 11 can be evenly dissipated to the circumferential edge of the base 10, reducing the probability of heat pile caused by the longer heat dissipation distance on the base 10.

[0055] In some embodiments, when the base 10 and the through hole 11 are concentrically arranged, the minimum spacing D1 between the circumferential edge of the base 10 and the circumferential edge of the through hole 11 can be the radius of the base 10 minus the radius of the through hole 11.

[0056] In addition, the base 10 is designed as a circular structure, compared with a square or polygonal base 10, so that there is no corner structure on the circumferential edge of the base 10, so that the first sealing part 70 can effectively infiltrate at the circumferential edge of the base 10, reducing the probability of filling air bubbles caused by poor infiltration effect of small angle corner, thereby reducing the risk of filling dead angle.

[0057] In this way, the base 10 and the through hole 11 are both designed as a circular shape, which is not only beneficial to improve the water blocking effect, but also makes the heat dissipation distance between the base 10 and the through hole 11 consistent, which is beneficial to realize uniform heat dissipation. In addition, the circular design of the base 10 facilitates the filling and infiltration of the first sealing part 70 on the circumferential edge of the base 10, improving the reliability of the structure.

[0058] According to some embodiments of the present application, as shown in Figure 1 The shell further comprises an inner liner 30, which surrounds the outer periphery of the through hole 11 and separates the cavity 40 into a first sub-cavity 41 in communication with the through hole 11 and a second sub-cavity 42 surrounding the first sub-cavity 41, and the first sub-cavity 41 and the second sub-cavity 42 are both filled with the second sealing part 80.

[0059] The inner liner 30 refers to a structure surrounding the outer periphery of the through hole 11, and a first sub-cavity 41 formed by the surrounding of the inner liner 30 is in communication with the through hole 11. When the base 10 is installed on the assembly body 200, the lead-out wire 220 extends into the first sub-cavity 41 from the through hole 11 and is electrically connected with the photovoltaic junction box 100. The electrical connection between the lead-out wire 220 and the photovoltaic junction box 100 can be in various forms, such as: the lead wire 50 is arranged on the inner liner 30, and the lead wire 50 is electrically connected with the lead-out wire 220.

[0060] The inner liner 30 surrounds the outer periphery of the through hole 11, which is equivalent to setting a protective layer outside the through hole 11, thereby facilitating the improvement of water resistance. The inner liner 30 on the base 10 can be directly arranged on the circumferential edge of the through hole 11, or can be arranged at a position spaced from the circumferential edge of the through hole 11. At the same time, the arrangement of the inner liner 30 on the base 10 can be in the form of assembly, such as: bonding, clamping, riveting, welding, bolt connection, etc. It can also be in the form of one-piece molding, such as: but not limited to injection molding, die casting, 3D printing, etc.

[0061] In addition, the shape of the inner liner 30 can be various designs, such as: the shape of the inner liner 30 can be but not limited to cylindrical, quadrangular prism, pentagonal prism, etc.

[0062] In this way, the inner liner 30 is arranged inside the surrounding shell 20 to form a protective structure around the outer periphery of the through hole 11, which is conducive to improving water resistance.

[0063] According to some embodiments of the present application, optionally, please refer to Figure 5 The height of the first sub-cavity 41 is denoted as h, wherein h≥10.9mm.

[0064] The height of the first sub-cavity 41 can affect the water resistance of the photovoltaic junction box 100 along the height direction X, for example: if the height of the first sub-cavity 41 is too low, water vapor is easy to pass along the height direction X to the lead-out wire 220 to corrode the inside of the photovoltaic junction box 100.

[0065] Therefore, the height of the first sub-cavity 41 is controlled to be greater than or equal to 10.9mm, such as: but not limited to 10.9mm, 11mm, 12mm, 13mm, 14mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, etc.

[0066] Of course, in some embodiments, the height of the first sub-cavity 41 can also be limited within 50mm, for example: the height h also satisfies: 10.9mm≤h≤50mm. In this way, the height h is further controlled to be 10.9mm~50mm, so as to reduce the height dimension of the photovoltaic junction box 100 while meeting the effective water resistance stroke.

[0067] In this way, the height of the first sub-cavity 41 is controlled to be greater than or equal to 10.9 mm, the water-blocking stroke of the junction box in the height direction X is reasonably controlled, the water-blocking performance of the photovoltaic junction box 100 is improved, and the stability of the assembly is improved.

[0068] According to some embodiments of the present application, optionally, referring to Figure 5 The minimum spacing between the inner liner 30 and the enclosure 20 is denoted as D2, where D2≥10.9 mm.

[0069] The spacing between the inner liner 30 and the enclosure 20 can affect the radial water-blocking stroke in the second sub-cavity 42. If the minimum spacing D2 is designed to be too small, water vapor can easily reach the first sub-cavity 41 in the radial direction and be transmitted to the lead-out wire 220. Therefore, in this embodiment, the minimum spacing D2 is controlled to be greater than or equal to 10.9 mm, such as but not limited to 10.9 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, etc.

[0070] Of course, in some embodiments, the minimum spacing D2 can also be limited to within 30 mm, for example: the minimum spacing D2 also satisfies: 10.9 mm≤D2≤30 mm. In this way, the minimum spacing D1 is further controlled to be 10.9 mm~30 mm, which reduces the radial size of the photovoltaic junction box 100 while meeting the effective water-blocking stroke. In this way, not only the cost is saved, but also the influence of the working heat of the photovoltaic junction box 100 on the assembly body 200 is reduced.

[0071] Specifically, referring to Figure 1 The enclosure 20 and the inner liner 30 are both configured as cylindrical ring structures and are concentrically arranged. At this time, the difference between the radius of the enclosure 20 and the radius of the inner liner 30 is the minimum spacing D2.

[0072] In this way, the minimum spacing D2 is controlled to be greater than or equal to 10.9 mm, the radial water-blocking stroke of the photovoltaic junction box is reasonably controlled, the water-blocking performance of the photovoltaic junction box 100 is improved, and the stability of the assembly is improved.

[0073] According to some embodiments of the present application, optionally, referring to Figure 5 The photovoltaic junction box 100 further includes a wire 50, the wire 50 penetrates the enclosure 20 and the inner liner 30, and the wire 50 located at one end of the first sub-cavity 41 includes a connecting end 51 for electrically connecting with the lead-out wire 220 of the photovoltaic assembly.

[0074] The conductor 50 passes through the housing 20 and the inner liner 30, with one end of the conductor 50 located inside the first split cavity 41. This facilitates the electrical connection between the conductor 50 and the lead wire 220 of the photovoltaic module, making the installation of the photovoltaic junction box 100 easier. Simultaneously, passing the conductor 50 through the housing 20 and the inner liner 30 effectively supports the conductor 50, making the connection between the conductor 50 and the lead wire 220 more stable. There are several ways to pass the conductor 50 through the housing 20 and the inner liner 30, such as providing through holes in the housing 20 and the inner liner 30, and then passing the conductor 50 through the through holes in the housing 20 and the inner liner 30 respectively.

[0075] In addition, the connection end 51 refers to the end of the conductor 50 used to connect with the lead wire 220. There are various ways to electrically connect the connection end 51 and the lead wire 220, such as welding, binding, etc.

[0076] This design allows the conductor 50 to pass through the enclosure 20 and the inner lining 30, facilitating the electrical connection between the conductor 50 and the lead wire 220 and improving the installation convenience of the photovoltaic junction box 100. At the same time, it also facilitates the stable support of the conductor 50 and improves the stability of the structure.

[0077] Optionally, according to some embodiments of this application, please refer to Figure 5 The conductor 50 includes at least two conductors, each conductor 50 passing through the casing 20 and the inner lining 30, and distributed sequentially along the circumference of the perforation 11.

[0078] The number of wires 50 can be two or more, depending on the actual needs. The wires 50 are distributed sequentially along the circumference of the through hole 11 to facilitate the electrical connection of each wire 50 with the corresponding lead wire 220.

[0079] This design rationally distributes the positions of multiple conductors 50, facilitating the electrical connection of each conductor 50 with the lead wire 220 and simplifying the electrical connection operation of the photovoltaic junction box 100.

[0080] Optionally, according to some embodiments of this application, please refer to Figure 5 Both the outer shell 20 and the inner lining 30 are constructed as cylindrical ring structures.

[0081] Both the outer shell 20 and the inner liner 30 are designed as cylindrical annular structures. This allows the second sealing part 80 to better wet the first split cavity 41 and the second split cavity 42 when filling, reducing the generation of air bubbles due to insufficient wetting and thus lowering the risk of filling dead zones. In some specific embodiments, the outer shell 20 and the inner liner 30 are concentrically arranged.

[0082] In this way, the shell 20 and the inner liner 30 are designed as cylindrical ring structures, facilitating the infiltration of the second sealing part 80 in the first and second sub-cavities 41 and 42, reducing the generation of air bubbles during filling, and improving the stability of the structure.

[0083] According to some embodiments of the present application, optionally, referring to Figure 2 With Figure 3 , the first sealing part 70 and / or the second sealing part 80 are configured as butyl rubber or silicone rubber.

[0084] Butyl rubber refers to synthetic rubber, which is synthesized from isobutylene and a small amount of isoprene, and has good water resistance. During sealing, butyl rubber can be provided on the side of the base 10 away from the cavity 40; or butyl rubber can also be filled in the cavity 40; or butyl rubber can also be filled in the side of the base 10 and the cavity 40.

[0085] In this way, at least one of the first sealing part 70 and the second sealing part 80 is designed as butyl rubber or silicone rubber, which facilitates the improvement of water resistance.

[0086] According to some embodiments of the present application, optionally, referring to Figure 6 The photovoltaic junction box 100 further comprises a cover 60, which is arranged on the end of the shell 20 away from the base 10.

[0087] The cover 60 refers to a structure that closes one end of the shell 20, so that the cavity 40 remains in a closed state. The connection between the cover 60 and the shell 20 can be in various ways, such as but not limited to threaded connection, clamping, riveting, welding, etc.

[0088] In this way, the cover 60 is introduced to keep the cavity 40 in a closed state, which is conducive to further improving the water resistance of the photovoltaic junction box 100.

[0089] According to some embodiments of the present application, referring to Figure 4 With Figure 7 The present application provides a photovoltaic module, which comprises: a module body 200, a lead-out wire 220 passing through the surface thereof; the photovoltaic junction box 100 of any one of the above, the base 10 being arranged on the surface of the module body 200 through the first sealing part 70, and the lead-out wire 220 being arranged in the perforation 11 and electrically connected with the photovoltaic junction box 100.

[0090] The module body 200 refers to a component in a photovoltaic module that converts light energy into electrical energy, which includes a functional layer group and a packaging structure. For the sake of understanding, taking a perovskite solar cell module as an example, the functional layer group of the module body 200 can include a base glass, a transparent conductive layer, an electron transport layer, a perovskite layer, a hole transport layer, and a metal electrode.

[0091] In the packaging process, a copper strip is pasted on the positive and negative electrodes of the photovoltaic module, and one end of each copper strip is extended out; then the adhesive film and the glass cover plate are covered in turn, so that the extended end of the copper strip penetrates out of the adhesive film and the glass cover plate to serve as the lead-out wire 220 of the photovoltaic module.

[0092] In this way, by the first sealing part 70 and the second sealing part 80, water vapor blocking in different directions of the lead-out wire 220 can be realized, the water blocking distance is effectively increased, the water blocking performance is improved, the corrosion probability of the photovoltaic module is reduced, and thus the stability of the module is improved.

[0093] According to some embodiments of the present application, the present application provides a power utilization device, which comprises the above photovoltaic module.

[0094] According to some embodiments of the present application, the present application provides a power generation device, which comprises the above photovoltaic module.

[0095] The power generation device refers to a power generation system for directly converting solar radiation energy into electric energy by photovoltaic effect, which is divided into a stand-alone photovoltaic power generation system and a grid-connected photovoltaic power generation system. The stand-alone photovoltaic power generation system is composed of a solar photovoltaic array, a battery pack, a charge controller, a power electronic converter (inverter), a load, etc. The grid-connected photovoltaic power generation system is composed of a photovoltaic array, a high-frequency DC / DC booster circuit, a power electronic converter (inverter), and a system monitoring part.

[0096] According to some embodiments of the present application, please refer to Figures 1 to 7 , the present application provides a photovoltaic junction box 100, which comprises a first sealing part 70, a second sealing part 80, a base 10, an enclosure 20, an inner liner 30, and a cover 60. The inner liner 30 and the enclosure 20 are spaced apart on the base 10, and the enclosure 20 is sleeved outside the inner liner 30. The inner liner 30 is internally enclosed to form a first sub-cavity 41, and the enclosure 20 and the inner liner 30 are enclosed to form a second sub-cavity 42. The base 10 is provided with a through hole 11 communicating with the first sub-cavity 41. The first sealing part 70 is arranged on the bottom surface of the base 10, the second sealing part 80 is filled in the first sub-cavity 41 and the second sub-cavity 42 respectively, and the cover 60 is arranged on the end of the enclosure 20 away from the base 10. The first sealing part 70 and the second sealing part 80 are both butyl rubber, the base 10 is a circular structure, and the enclosure 20 and the inner liner 30 are both cylindrical ring structures.

[0097] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0098] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A photovoltaic junction box, characterized by, The photovoltaic junction box comprises: a housing comprising a base (10) and a surrounding shell (20), the surrounding shell (20) being arranged on the base (10) and enclosing a cavity (40), the base (10) being provided with a through hole (11) communicating with the cavity (40); a sealing structure comprising a first sealing part (70) and a second sealing part (80), the first sealing part (70) being arranged on the side of the base (10) away from the cavity (40) and at least partially surrounding the outer periphery of the through hole (11), and the second sealing part (80) being filled in the cavity (40).

2. The photovoltaic junction box of claim 1, wherein, The minimum distance between the circumferential edge of the base (10) and the circumferential edge of the through hole (11) is denoted as D1, wherein D1≥10.9mm.

3. The photovoltaic junction box of claim 2, wherein, The minimum distance D1 also satisfies: 10.9mm≤D1≤30mm.

4. Photovoltaic junction box according to any of claims 1 to 3, characterized in that The base (10) is configured in a circular structure, the through hole (11) is configured as a circular hole, and the through hole (11) and the base (10) are concentrically arranged.

5. The photovoltaic junction box of claim 1, wherein, The housing further comprises an inner liner (30) surrounding the outer periphery of the through hole (11) and separating the cavity (40) into a first sub-cavity (41) communicating with the through hole (11) and a second sub-cavity (42) surrounding the first sub-cavity (41), and the first sub-cavity (41) and the second sub-cavity (42) are both filled with the second sealing part (80).

6. The photovoltaic junction box of claim 5, wherein, The height of the first sub-cavity (41) is denoted as h, wherein h≥10.9mm.

7. The photovoltaic junction box of claim 6, wherein, The height h also satisfies: 10.9mm≤h≤50mm.

8. The photovoltaic junction box of claim 5, wherein, The minimum distance between the inner liner (30) and the surrounding shell (20) is denoted as D2, wherein D2≥10.9mm.

9. The photovoltaic junction box of claim 8, wherein, The minimum distance D2 also satisfies: 10.9mm≤D2≤30mm.

10. Photovoltaic junction box according to any of claims 5 to 9, characterized in that The photovoltaic junction box further comprises a wire (50) penetrating the surrounding shell (20) and the inner liner (30), and the wire (50) comprises a connecting end (51) at one end of the first sub-cavity (41) for electrically connecting with the lead-out wire (220) of the photovoltaic module.

11. The photovoltaic junction box of claim 10, wherein, The wire (50) comprises at least two, and each wire (50) penetrates the surrounding shell (20) and the inner liner (30) and is sequentially distributed along the circumference of the through hole (11).

12. A photovoltaic junction box according to any of claims 5-9, characterized in that The surrounding shell (20) and the inner liner (30) are both configured in a cylindrical ring structure.

13. The photovoltaic junction box of claim 1, wherein, The first sealing part (70) and / or the second sealing part (80) are configured as butyl rubber or silicone rubber.

14. The photovoltaic junction box of claim 1, wherein, The photovoltaic junction box further comprises a cover (60) arranged on the end of the surrounding shell (20) away from the base (10).

15. A photovoltaic module, characterized by The photovoltaic module comprises: a module body (200) with a lead-out wire (220) penetrating out of the surface thereof; The photovoltaic junction box according to any one of claims 1-14, the base (10) being arranged on the surface of the module body (200) through the first sealing part (70), and the lead-out wire (220) being arranged in the through hole (11) and electrically connected with the photovoltaic junction box.

16. An electrical device, comprising: The power-using device includes the photovoltaic module of claim 15.

17. A power generation device characterized by comprising: The power-generating device includes the photovoltaic module of claim 15.

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