A water-resistant photovoltaic module

Abstract

The application discloses a water-proof photovoltaic module. The water-proof photovoltaic module comprises a frame, a laminated piece, sealing rubber and sealing silica gel. The frame comprises a top plate, a bottom plate and side plates, and the top plate, the bottom plate and the side plates form a containing cavity which is suitable for containing the laminated piece. A groove is arranged on the side plate, the sealing rubber is embedded in the groove, and the sealing rubber is attached to the side surface of the laminated piece. The top plate and the bottom plate are provided with the sealing silica gel on the side facing the bottom plate and the side facing the top plate respectively, and the sealing silica gel is attached to the front surface and the back surface of the laminated piece respectively. The water-proof photovoltaic module can effectively realize waterproofing and has a lower cost.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to a water-blocking photovoltaic module. Background Technology

[0002] Photovoltaic power generation is a technology that converts solar energy into electrical energy. Its core component is the solar panel, also known as a photovoltaic module. The main structure of a photovoltaic module includes glass, EVA film, solar cells, and a backsheet. The front of the photovoltaic module is covered with a layer of tempered glass, which provides some protection for the photovoltaic cells encapsulated inside the module. With the rapid development of photovoltaic technology, photovoltaic modules are widely used in rooftop power stations, ground-mounted power stations, and distributed energy systems. However, photovoltaic modules are exposed to the outdoor environment for extended periods, facing the risks of corrosion from rain, moisture, and salt spray. Their water-blocking performance directly affects their power generation efficiency and lifespan.

[0003] Existing methods for water blocking in photovoltaic modules include wrapping the edges of the module with waterproof tape, but the low water vapor permeability of the tape can negatively impact the module. Another method involves pressing butyl rubber onto the edges of double-glass modules to seal them, but butyl rubber is expensive, increasing the cost of photovoltaic modules. Utility Model Content

[0004] To solve the above-mentioned technical problems, this application provides a water-blocking photovoltaic module, which adopts a novel sealant structure and combines different frame and glass structures to achieve water blocking of the photovoltaic module. The specific technical solution is as follows.

[0005] This application provides a water-blocking photovoltaic module, including: a frame, a laminate, sealing rubber, and sealing silicone; wherein, the frame includes a top plate, a bottom plate, and a side plate, the top plate, the bottom plate, and the side plate forming a receiving cavity, the receiving cavity being adapted to receive the laminate; the side plate has a groove, the sealing rubber is embedded in the groove, and the sealing rubber is in contact with the side of the laminate; and the top plate facing the bottom plate and the bottom plate facing the top plate are provided with sealing silicone, the sealing silicone being in contact with the front and back of the laminate, respectively.

[0006] Optionally, the sealing rubber includes a main body and a first protrusion and a second protrusion connected to the main body. The first protrusion is located in the top region of the main body, and the second protrusion is located in the bottom region of the main body. The main body is bonded to the side of the laminate, the first protrusion is bonded to the front of the laminate, and the second protrusion is bonded to the back of the laminate.

[0007] Optionally, the laminate includes a glass plate, which includes a middle portion and a thinned portion; wherein the thinned portion is located on two opposite edges of the glass plate along a first direction perpendicular to the side plate, the thinned portion and the middle portion are connected to form a stepped area, and the thickness of the thinned portion is less than the thickness of the middle portion.

[0008] Optionally, the sealing rubber includes a main body and a third protrusion connected to the main body, the third protrusion being located in the middle region of the main body; wherein the third protrusion is in contact with the stepped region.

[0009] Optionally, the top plate has a top plate groove on the side facing the bottom plate, and the top plate groove is filled with sealing silicone.

[0010] Optionally, the bottom plate has a bottom plate groove on the side facing the top plate, and the bottom plate groove is embedded with sealing silicone.

[0011] Optionally, the length of the sealing rubber along the second direction is greater than or equal to the length of the laminate along the second direction, wherein the second direction is perpendicular to the cross section of the laminate that is tangent to the normal direction.

[0012] Optionally, the sealing rubber comprises EPDM rubber.

[0013] Optionally, the working temperature range of EPDM rubber is -40℃ to 150℃.

[0014] Optionally, the sealing silicone contains butyl rubber.

[0015] The technical effects of the water-blocking photovoltaic module provided in this application are as follows: by adopting a novel sealant structure and combining it with a glass structure with an edge thinning design, the photovoltaic module achieves water blocking. The sealant structure includes low-cost EPDM rubber, which can be effectively applied to water vapor and weak acid environments, improving the waterproof effect while reducing costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a partially enlarged view of the water-blocking photovoltaic module 100 in Embodiment 1 provided in this application;

[0018] Figure 2 This is a partially enlarged view of the water-blocking photovoltaic module 200 in Embodiment 2 provided in this application;

[0019] Figure 3 This is a partially enlarged view of the water-blocking photovoltaic module 300 in Embodiment 3 provided in this application;

[0020] Figure 4 This is a cross-sectional view of the glass plate 21 provided in this application along the x-direction of the photovoltaic module normal.

[0021] Icon labels:

[0022] Border: 10;

[0023] Laminates: 20;

[0024] Sealing rubber: 30;

[0025] Sealing silicone: 40;

[0026] Top plate: 11;

[0027] Base plate: 12;

[0028] Side panel: 13;

[0029] Groove: 131;

[0030] Main body: 31;

[0031] First protrusion: 32;

[0032] Second protrusion: 33;

[0033] Third protrusion: 34;

[0034] Glass plate: 21;

[0035] Middle section: 211;

[0036] Thinning section: 212;

[0037] Step area: 213. Detailed Implementation

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this application. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0039] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0040] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0041] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In addition, although the terminology used in this application is selected from commonly known and used terms, some terms mentioned in this application's specification may have been chosen by the applicant according to his or her judgment, and their detailed meanings are explained in the relevant sections of this description. Moreover, this application should be understood not only through the actual terms used, but also through the meaning implied by each term.

[0043] Reference Figure 1This is a partial enlarged view of the water-blocking photovoltaic module 100 in Embodiment 1 of this application. The water-blocking photovoltaic module 100 includes: a frame 10, a laminate 20, sealing rubber 30, and sealing silicone 40. The frame 10 includes a top plate 11, a bottom plate 12, and a side plate 13, which form a receiving cavity suitable for accommodating the laminate 20. Preferably, in this embodiment, the side plate 13 has a groove 131, and the sealing rubber 30 is embedded in the groove 131, and the sealing rubber 30 is in contact with the side of the laminate 20. Preferably, in this embodiment, the side of the top plate 11 facing the bottom plate 12 and the side of the bottom plate 12 facing the top plate 11 are provided with sealing silicone 40, which is in contact with the front and back of the laminate 20, respectively.

[0044] In this embodiment, preferably, sealing rubber 30 and sealing silicone 40 are first applied inside the frame 10, and then the laminate 20 is placed into the receiving cavity of the frame 10. The outer edge of the laminate 20 is pressed and adhered to the sealing rubber 30 and sealing silicone 40 in the receiving cavity, so that the sealing rubber 30 and sealing silicone 40 cover the sides, front and back of the laminate 20, thereby sealing the laminate 20 and achieving a waterproof effect.

[0045] In this embodiment, preferably, the sealing rubber 30 comprises ethylene propylene diene monomer (EPDM) rubber, the working temperature range of which is -40℃ to 150℃, and the water vapor permeability of which is 0.1-0.5 g / (m²). 2 ·day), which can be effectively applied in water vapor and weak acid environments. Moreover, the raw material cost of EPDM rubber is 30,000 to 40,000 yuan / ton, which is less than the raw material cost of butyl rubber (50,000 to 80,000 yuan / ton). Therefore, using EPDM rubber as the sealing rubber in the sealing laminate can effectively reduce costs while improving water resistance.

[0046] In this embodiment, preferably, the sealing silicone 40 contains butyl rubber, because the sealing silicone 40 needs to bond the front and back of the laminate 20, and the front and back of the laminate 20 are glass. The adhesion between butyl rubber and glass is stronger than that between EPDM rubber and glass. Therefore, using butyl rubber in the sealing silicone 40 can enhance the adhesion strength between the sealing silicone 40 and the laminate 20, and further improve the sealing and water-blocking effects of the photovoltaic module.

[0047] Furthermore, refer to Figure 2This is a partially enlarged view of the water-blocking photovoltaic module 200 in Embodiment 2 of this application. Unlike Embodiment 1, the sealing rubber 30 in Embodiment 2 includes a main body 31 and a first protrusion 32 and a second protrusion 33 connected to the main body 31. Preferably, in this embodiment, the first protrusion 32 is located in the top region of the main body 31, and the second protrusion 33 is located in the bottom region of the main body 31. The main body 31 is bonded to the side of the laminate 20, the first protrusion 32 is bonded to the front of the laminate 20, and the second protrusion 33 is bonded to the back of the laminate 20. Furthermore, the first protrusion 32 is also bonded to the sealing silicone 40 disposed on the top plate 11, and the second protrusion 33 is also bonded to the sealing silicone 40 disposed on the bottom plate 12.

[0048] The main body 31, the first protrusion 32, and the second protrusion 33 achieve complete wrapping of the sides, front, and back of the laminate 20 by the sealing rubber 30. The sealing silicone 40 is then used to bond the first protrusion 32 and the second protrusion 33, further enhancing the sealing performance of the photovoltaic module and improving the water-blocking effect.

[0049] In Embodiment 2 of this application, preferably, the side of the first protrusion 32 that contacts the front of the laminate 20 also has an adhesive structure, and the side of the second protrusion 33 that contacts the back of the laminate 20 also has an adhesive structure. In one embodiment, the adhesive structure is obtained by treating the surfaces of the first protrusion 32 and the second protrusion 33 that contact the laminate 20 (e.g., plasma activation). In another embodiment, the adhesive structure is obtained by adding an adhesive enhancer to the surfaces of the first protrusion 32 and the second protrusion 33 that contact the laminate 20. When the sealing rubber 30 contains EPDM rubber, since the adhesion between EPDM rubber and glass is not strong, it is necessary to treat the surfaces of the first protrusion 32 and the second protrusion 33 that contact the laminate 20 to enhance the adhesion between the sealing rubber 30 and the laminate 20, thereby improving the sealing and waterproofing effects.

[0050] Furthermore, refer to Figure 3 This is a partially enlarged view of the water-blocking photovoltaic module 300 in Embodiment 3 of this application. Unlike Embodiments 1 and 2, in Embodiment 3, the laminate 20 includes a glass plate 21. Figure 4 A cross-sectional view of the glass plate 21 along the x-direction normal to the photovoltaic module is shown. The glass plate 21 includes a middle portion 211 and a thinned portion 212. Preferably, in this embodiment, the thinned portion 212 is located at opposite edges of the glass plate 21 along a first direction y, which is perpendicular to the side plate 13. The thinned portion 212 and the middle portion 211 are connected to form a stepped region 213, and the thickness of the thinned portion 212 is less than the thickness of the middle portion 211. Figure 3As shown, the sealing rubber 30 includes a main body 31 and a third protrusion 34 connected to the main body 31. The third protrusion 34 is located in the middle region of the main body 31 and is in contact with the stepped region 213 of the glass plate 21.

[0051] The glass plate 21 is designed with a thinned edge structure. Through its thinned part 212, it adheres to the sealing rubber 30, which increases the contact area between the sealing rubber 30 and the glass plate 21, thereby enhancing the adhesion between the glass plate 21 and the sealing rubber 30, improving the sealing performance and thus improving the waterproof effect of the photovoltaic module.

[0052] Furthermore, in another embodiment (not shown in the figure), the sealing rubber 30 may simultaneously have a main body 31, a first protrusion 32, a second protrusion 33, and a third protrusion 34. The main body 31 is attached to the side of the laminate 20, the first protrusion 32 is attached to the side of the glass plate 21 near the top plate 11 facing the sealing silicone 40, the second protrusion 33 is attached to the side of the glass plate 21 near the bottom plate 12 facing the sealing silicone 40, and the third protrusion 34 is attached to the stepped area 213 of the glass plate 21. By sealing the laminate 20 with the sealing rubber 30 having the main body 31, the first protrusion 32, the second protrusion 33, and the third protrusion 34 simultaneously, the sealing performance and waterproof effect can be further improved.

[0053] In a preferred embodiment of this application, the sealing rubber 30 is along the second direction z (refer to...). Figure 3 The length of the laminate 20 is greater than or equal to the length of the laminate 20 along the second direction z, thereby achieving complete sealing of the side of the laminate 20, wherein the second direction z is perpendicular to the cross section of the laminate 20 tangent to the normal x direction.

[0054] In a preferred embodiment of this application, the top plate 11 has a top plate groove on the side facing the bottom plate 12, and a sealing silicone 40 is embedded in the top plate groove; and / or the bottom plate 12 has a bottom plate groove on the side facing the top plate 11, and a sealing silicone 40 is embedded in the bottom plate groove. By providing a top plate groove on the top plate 11 and a bottom plate groove on the bottom plate 12, the frictional force between the sealing silicone 40 and the top plate 11 and the bottom plate 12 is increased, thereby increasing the bonding strength between the sealing silicone 40 and the top plate 11 and the bottom plate 12.

[0055] The basic concepts have been described above. Obviously, for those skilled in the art, the above disclosure is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0056] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic related to at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0057] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0058] In some embodiments, numbers describing the quantity of components and attributes are used. It should be understood that such numbers used in the description of embodiments are modified in some examples with the terms "approximately," "approximately," or "generally." Unless otherwise stated, "approximately," "approximately," or "generally" indicates that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may be changed depending on the characteristics required by individual embodiments. In some embodiments, numerical parameters should take into account specified significant digits and employ a general method of digit reservation. Although the numerical ranges and parameters used to confirm their breadth of scope in some embodiments of this application are approximate values, in specific embodiments, such values ​​are set as precisely as feasible.

[0059] Although this application has been described with reference to specific embodiments, those skilled in the art should recognize that the above embodiments are only used to illustrate this application, and various equivalent changes or substitutions can be made without departing from the spirit of this application. Therefore, any changes or modifications to the above embodiments within the essential spirit of this application will fall within the scope of the claims of this application.

Claims

1. A water-blocking photovoltaic module, characterized in that, include: Frame, laminate, sealing rubber and sealing silicone; among which, The frame includes a top plate, a bottom plate, and a side plate, which form a receiving cavity adapted to receive the laminate. The side plate has a groove, and the sealing rubber is embedded in the groove, the sealing rubber being in contact with the side of the laminate; and The sealing silicone is provided on the side of the top plate facing the bottom plate and the side of the bottom plate facing the top plate, and the sealing silicone is respectively attached to the front and back of the laminate.

2. The water-blocking photovoltaic module as described in claim 1, characterized in that, The sealing rubber includes a main body and a first protrusion and a second protrusion connected to the main body. The first protrusion is located in the top region of the main body, and the second protrusion is located in the bottom region of the main body. The main body is fitted to the side of the laminate, the first protrusion is fitted to the front of the laminate, and the second protrusion is fitted to the back of the laminate.

3. The water-blocking photovoltaic module as described in claim 1, characterized in that, The laminate includes a glass plate, the glass plate comprising a middle portion and a thinned portion; wherein... The thinning portion is located on both opposite edges of the glass plate along a first direction, which is perpendicular to the side plate. The thinning portion and the middle portion are connected to form a stepped area, and the thickness of the thinning portion is less than the thickness of the middle portion.

4. The water-blocking photovoltaic module as described in claim 3, characterized in that, The sealing rubber includes a main body and a third protrusion connected to the main body, the third protrusion being located in the middle region of the main body; wherein... The third protrusion is in contact with the stepped area.

5. The water-blocking photovoltaic module as described in claim 1, characterized in that, The top plate has a top plate groove on the side facing the bottom plate, and the sealing silicone is embedded in the top plate groove.

6. The water-blocking photovoltaic module as described in claim 1, characterized in that, The bottom plate has a bottom plate groove on the side facing the top plate, and the sealing silicone is embedded in the bottom plate groove.

7. The water-blocking photovoltaic module as described in claim 1, characterized in that, The length of the sealing rubber along the second direction is greater than or equal to the length of the laminate along the second direction, wherein the second direction is perpendicular to the cross section of the laminate that is tangent to the normal direction.

8. The water-blocking photovoltaic module according to any one of claims 1-7, characterized in that, The sealing rubber comprises ethylene propylene diene monomer (EPDM) rubber.

9. The water-blocking photovoltaic module as described in claim 8, characterized in that, The working temperature range of the EPDM rubber is -40℃ to 150℃.

10. The water-blocking photovoltaic module according to any one of claims 1-7, characterized in that, The sealing silicone contains butyl rubber.

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