Sealing waterproof packaging layer of photovoltaic solar cell backboard

Abstract

The utility model provides a photovoltaic solar cell backboard sealing waterproof packaging layer, which comprises a backboard main body, a pressing plate and a sealing plate, the top of the backboard main body is recessed downwards to form a placing cavity, sliding installation grooves are respectively arranged above two sides of the placing cavity, and one side of each sliding installation groove far away from the placing cavity is provided with a drainage groove. Compared with the prior art, the waterproof structure has the advantages that the first sealing strips are arranged, the two sets of first sealing strips are tightly pressed against the top of the metal covered edge, and therefore water prevention is conducted on a gap between the sliding installation strip and the sliding installation groove; water permeating into a gap between the pressing plate and the inner side of the back plate body is discharged through the drainage groove, water at the top of the waterproof plate can be discharged through the drainage opening, the water is prevented from being deposited at the top of the waterproof plate, the second sealing strip and the sealing plate can conduct waterproof sealing on the butt joint position of the sealing plate and the back plate body, and therefore the water is prevented from being deposited at the gap.

Description

Technical Field

[0001] This utility model belongs to the field of encapsulation layer technology, and specifically relates to a waterproof encapsulation layer for the backsheet of a photovoltaic solar cell. Background Technology

[0002] The backsheet of a photovoltaic (PV) solar cell is a key component of a PV module, primarily protecting the cells from physical damage, chemical corrosion, and environmental moisture. Located on the back of the solar cells, the backsheet is crucial for the PV module's operation in outdoor environments, exposed to rain, humidity, and other natural conditions. If moisture seeps into the backsheet, it can degrade insulation performance and increase the risk of short circuits. Conventional waterproofing methods involve optimizing the module's design to enhance its waterproofing capabilities, such as reinforcing joint designs. While these methods effectively prevent external moisture ingress, gaps at the joints allow some moisture to seep in. This moisture cannot effectively drain, maintaining the risk of long-term water penetration. Therefore, a new structure is proposed to address these issues. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a waterproof sealing layer for the backsheet of a photovoltaic solar cell.

[0004] This utility model is achieved through the following technical solution: a waterproof sealing layer for a photovoltaic solar cell backsheet, comprising: a backsheet body, a pressing plate and a sealing plate, wherein the top of the backsheet body is recessed downward to form a placement cavity, and a sliding mounting groove is provided on each of the upper sides of the placement cavity, and a drainage groove is provided on the side of the sliding mounting groove away from the placement cavity;

[0005] A waterproof plate is installed above the placement cavity. Metal edging is provided on both the left and right sides of the waterproof plate. A sliding mounting strip is provided on the side of the metal edging away from the waterproof plate. A pressing plate is provided above the metal edging. A sealing strip is glued to the bottom of the pressing plate.

[0006] The back panel has a sealing plate installed on the front side. The sealing plate has a C-shaped structure and a drainage outlet at the top. Sealing strips are glued to the left and right sides of the sealing plate, and a sealing plate is glued to the back of the sealing plate.

[0007] In a preferred embodiment, a placement groove is provided on the rear side of the back panel body. The left and right sides of the placement groove are respectively connected to the rear sides of two sets of sliding mounting grooves. The top and bottom of the placement groove are provided with sealant. The height of the placement groove matches the thickness of the waterproof board. The placement groove serves to place the rear side of the waterproof board. At the same time, the sealant on the inside of the placement groove can fill the gap between the waterproof board and the placement groove to prevent water from seeping through the gap.

[0008] In a preferred embodiment, the sliding mounting groove and the drainage groove are an integral structure. The width of the drainage groove is equal to the width of the sliding mounting groove, and the height of the sliding mounting groove matches the thickness of the sliding mounting strip. The front side of the drainage groove extends through the front of the back panel body. The height of the sliding mounting strip is less than the height of the metal edging, thus creating a height difference. Water entering through the gap first enters the sliding mounting groove and then the drainage groove. After the water accumulates, it is finally discharged through the connection between the drainage groove and the front of the back panel body, preventing water penetration.

[0009] In a preferred embodiment, the waterproof membrane is made of acrylic, and the length of the waterproof membrane is equal to the distance between the front side of the sliding mounting groove and the rear side of the placement groove. The horizontal height of the front side of the waterproof membrane is equal to the horizontal height of the bottom of the drain outlet. Due to the tilt angle of the back body, the water accumulated on the top of the waterproof membrane flows from the top of the waterproof membrane to the sealing plate and is discharged outward through the drain outlet, which also has the effect of preventing water penetration.

[0010] In a preferred embodiment, the top of the clamping plate is provided with three sets of fixing grooves from front to back. The top of the fixing groove is provided with a sealing groove. The bottom of the sealing groove is connected to the top of the fixing groove. A rubber layer is glued to the inside of the sealing groove. A fixing bolt is installed inside the fixing groove by means of a threaded connection. The radius of the top of the fixing bolt matches the radius of the sealing groove.

[0011] The top of the metal edging and the bottom of the fixing groove are respectively provided with screw-in grooves, and the screw-in grooves are the same as the fixing groove.

[0012] In a preferred embodiment, the sealing plate has a fixing groove 2 at the top and bottom positions on the left and right sides, the fixing groove 2 passes through the sealing strip 2, and the inner side of the back plate body opposite the fixing groove 2 is provided with a screw hole, the screw hole is the same as the fixing groove 2, and the outer side of the screw hole is provided with a fixing bolt 2 that matches the specifications of the screw hole.

[0013] In a preferred embodiment, the first sealing strip, the second sealing strip, and the sealing plate are all made of rubber. The shape of the sealing plate matches the shape of the sealing plate, and the width of the sealing plate matches the width of the waterproof plate.

[0014] After adopting the above technical solution, the beneficial effects of this utility model are as follows: By setting a fixing groove, a pressing plate, a sealing strip, and a metal edging, and by threading a fixing bolt to the fixing groove and the screw groove respectively, the two sets of pressing plates are installed and fixed on the top of the metal edging, and the two sets of sealing strips are pressed against the top of the metal edging, thereby waterproofing the gap between the sliding mounting strip and the sliding mounting groove. By setting a drainage groove, a drainage outlet, a sealing strip, and a sealing plate, water in the gap between the pressing plate and the inner side of the back plate body permeates into the drainage groove, and the water that has permeated inside is discharged through the drainage groove, thereby preventing water from entering the placement cavity through the gap between the pressing plate and the inner side of the back plate body. The drainage outlet can discharge water from the top of the waterproof plate, preventing water from accumulating on the top of the waterproof plate. The sealing strip and the sealing plate can waterproof and seal the joint between the sealing plate and the back plate body, preventing water from permeating into the back plate through the joint. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a waterproof sealing layer for a photovoltaic solar cell backsheet according to the present invention.

[0017] Figure 2 This is a schematic diagram of the sliding mounting groove and placement cavity in the waterproof sealing layer of a photovoltaic solar cell backsheet according to this utility model.

[0018] Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle.

[0019] Figure 4 This is a schematic diagram of the sealing plate in the waterproof encapsulation layer of a photovoltaic solar cell backsheet according to this utility model.

[0020] In the diagram, 100 is the back panel body, 110 is the placement cavity, 120 is the sliding mounting groove, and 121 is the drainage groove.

[0021] 200 - Pressure plate, 210 - Fixing groove 1, 220 - Sealing strip 1;

[0022] 300-Sealing plate, 301-Fixing groove II, 302-Drain outlet, 310-Sealing plate, 320-Sealing strip II;

[0023] 400 - Waterproof membrane, 410 - Metal edging, 411 - Sliding mounting strip. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one aspect of the present utility model, and not all aspects. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0025] Please see Figures 1 to 4 A waterproof sealing layer for a photovoltaic solar cell backsheet includes: a backsheet body 100, a pressing plate 200 and a sealing plate 300. The top of the backsheet body 100 is recessed downward to form a placement cavity 110. A sliding mounting groove 120 is provided on each of the upper sides of the placement cavity 110. A drainage groove 121 is provided on the side of the sliding mounting groove 120 away from the placement cavity 110.

[0026] A waterproof plate 400 is installed above the placement cavity 110. Metal edging 410 is provided on both the left and right sides of the waterproof plate 400. A sliding mounting strip 411 is provided on the side of the metal edging 410 away from the waterproof plate 400. A pressing plate 200 is provided above the metal edging 410. A sealing strip 220 is glued to the bottom of the pressing plate 200.

[0027] The back panel body 100 has a sealing plate 300 installed on the front. The sealing plate 300 has a C-shaped structure. A drain outlet 302 is opened on the top of the sealing plate 300. Sealing strips 320 are glued to the left and right sides of the sealing plate 300. A sealing plate 310 is glued to the back of the sealing plate 300.

[0028] The back panel body 100 has a placement groove on its rear side. The left and right sides of the placement groove are respectively connected to the rear sides of two sets of sliding mounting grooves 120. The top and bottom of the placement groove are covered with sealant. The height of the placement groove matches the thickness of the waterproof membrane 400. The placement groove serves to place the rear side of the waterproof membrane 400. At the same time, the sealant inside the placement groove can fill the gap between the waterproof membrane 400 and the placement groove to prevent water from seeping through the gap.

[0029] The sliding mounting groove 120 and the drainage groove 121 are an integral structure. The width of the drainage groove 121 is equal to the width of the sliding mounting groove 120. The height of the sliding mounting groove 120 matches the thickness of the sliding mounting strip 411. The width of the sliding mounting groove 120 is equal to the width of the sliding mounting strip 411. The front side of the drainage groove 121 extends through the front of the back panel body 100. The height of the sliding mounting strip 411 is less than the height of the metal edging 410, thus creating a height difference. Water entering through the gap first enters the interior of the sliding mounting groove 120 and then enters the interior of the drainage groove 121. After the water accumulates, it is finally discharged through the connection between the drainage groove 121 and the front of the back panel body, preventing water penetration.

[0030] The waterproof membrane 400 is made of acrylic. The length of the waterproof membrane 400 is equal to the distance between the front side of the sliding mounting groove 120 and the rear side of the placement groove. The horizontal height of the front side of the waterproof membrane 400 is equal to the horizontal height of the bottom of the drain outlet 302. Due to the tilt angle of the back body, the water accumulated on the top of the waterproof membrane 400 flows from the top of the waterproof membrane 400 to the sealing plate 300 and is discharged outward through the drain outlet 302, which also has the effect of preventing water penetration.

[0031] The top of the clamping plate 200 has three sets of fixing grooves 210 from front to back. The top of the fixing groove 210 has a sealing groove. The bottom of the sealing groove is connected to the top of the fixing groove 210. A rubber layer is glued to the inside of the sealing groove. A fixing bolt is installed inside the fixing groove 210 by means of threaded connection. The radius of the top of the fixing bolt matches the radius of the sealing groove.

[0032] The top of the metal edging 410 and the bottom of the fixing groove 210 are respectively provided with screw-in grooves, and the screw-in grooves are the same as the fixing groove 210.

[0033] Fixing grooves 301 are provided on the upper and lower positions of the left and right sides of the sealing plate 300. The fixing grooves 301 pass through the sealing strip 320. The inner side of the back plate body 100 opposite to the fixing grooves 301 is provided with a screw hole. The screw hole has the same specifications as the fixing grooves 301. Fixing bolts 2 that match the specifications of the screw hole are provided on the outside of the screw hole.

[0034] Sealing strip 220, sealing strip 320 and sealing plate 310 are all made of rubber. The shape of sealing plate 310 matches the shape of sealing plate 300, and the width of sealing plate 300 matches the width of waterproof plate 400.

[0035] Example 1: Please refer to Figure 1 and Figure 4In actual use, firstly, place the photovoltaic panel inside the placement cavity 110. The length, width, and height of the photovoltaic panel should match the length, width, and height of the placement cavity 110. Then, pick up the waterproof plate 400. The waterproof plate 400 and the two sets of metal edging 410 are an integral structure, and the metal edging 410 and the sliding mounting strip 411 are an integral structure. Insert the two sets of sliding mounting strips 411 along the two sets of sliding mounting grooves 120 respectively, so that the waterproof plate 400 slides backward and is inserted into the placement groove. The sealant on the upper and lower sides of the inner side of the placement groove is applied. Waterproof sealing is performed between the waterproof membrane 400 and the placement groove. After insertion, the pre-installation of the waterproof membrane 400 is completed. Then, the sealing plate 300 is picked up, and the side of the sealing plate 300 with the sealing plate 310 faces the front of the back panel body 100. Then, the sealing plate 300 is placed inside the front of the back panel body 100. The fixing bolts 2 are inserted into the screw holes, and the fixing bolts 2 are threaded to the screw holes and the fixing grooves 2 301 opposite to the screw holes, so that the sealing plate 300 is installed on the front of the back panel body 100 by the four sets of fixing bolts 2.

[0036] At this time, the sealing strips 320 on both sides of the sealing plate 300 are pressed tightly against the inner front side of the back plate body 100, the back of the sealing plate 310 is pressed tightly against the front of the back plate body 100 and the front of the waterproof plate 400, and the drain outlet 302 is at the same horizontal height as the front of the waterproof plate 400. When there is water on the top of the waterproof plate 400, the water slides forward along the waterproof plate 400 and is discharged through the drain outlet 302. The sealing strip 320 is pressed tightly against the inner front side of the back plate body 100 to prevent water from seeping through the gap between the sealing strip 320 and the inner front side of the back plate body 100. At the same time, the back of the sealing plate 310 is pressed tightly against the front of the back plate body 100 to prevent water from seeping into the placement cavity 110 through the gap between the sealing plate 310 and the front of the back plate body 100.

[0037] Example 2: Please refer to Figure 2 and Figure 3After installing the sealing plate 300, pick up two sets of clamping plates 200, place them with the sealing strip 220 attached to them facing down, and then place them on top of any metal edging 410. Pick up three sets of fixing bolts and insert them into the three fixing slots 210 in front-to-back order. Then, thread the fixing bolts into the fixing slots 210 and the threaded joint slots respectively. This will install one set of clamping plates 200 on top of the metal edging 410. Follow the same steps to install the second set of clamping plates 200 on top of the second set of metal edging 410, thus completing the installation of both sets of clamping plates 200. At this point, the bottom of the sealing strip 220 at the bottom of both sets of clamping plates 200 is connected to the metal edging 410. The top of the edging 410 is tightly connected to prevent water from the top of the waterproof board 400 from sliding down the sides and into the gap between the waterproof board 400 and the back panel body 100. At the same time, a small amount of water may seep downward through the gap between the pressing plate 200 and the inner side of the back panel body. Since the drainage groove 121 and the sliding mounting groove 120 are an integral structure, and the height of the sliding mounting strip 411 is less than the height of the metal edging 410, a height difference is formed. At this time, water will seep into the drainage groove 121 through the sliding mounting groove 120. After the water collects, it flows forward through the drainage groove 121 and is finally discharged through the through-hole between the drainage groove 121 and the front of the back panel body 100, thereby preventing water from seeping into the placement cavity 110 and damaging the photovoltaic panel.

[0038] Secondly, after the fixing bolt 1 is tightly connected to the screw groove and the fixing groove 210 respectively, the top of the fixing bolt 1 is inside the sealing groove, and the outer side of the top of the fixing bolt 1 is tightly squeezed with the inner side of the rubber layer bonded to the inner side of the sealing groove, thereby preventing water from seeping through the gap at the connection between the fixing bolt 1 and the fixing groove 210 and eliminating potential seepage risks.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof sealing layer for a photovoltaic solar cell backsheet, comprising: The back panel body (100), the pressing plate (200) and the sealing plate (300) are characterized in that: the top of the back panel body (100) is recessed downward to form a placement cavity (110), and a sliding mounting groove (120) is provided on each of the upper sides of the placement cavity (110), and a drainage groove (121) is provided on the side of the sliding mounting groove (120) away from the placement cavity (110). A waterproof plate (400) is installed above the placement cavity (110). A metal edging (410) is provided on each of the left and right sides of the waterproof plate (400). A sliding mounting strip (411) is provided on the side of the metal edging (410) away from the waterproof plate (400). A pressing plate (200) is provided above the metal edging (410). A sealing strip (220) is glued to the bottom of the pressing plate (200). The back panel body (100) is equipped with a sealing plate (300) on the front. The sealing plate (300) has a C-shaped structure. A drain outlet (302) is opened at the top of the sealing plate (300). Sealing strips (320) are glued to the left and right sides of the sealing plate (300). A sealing plate (310) is glued to the back of the sealing plate (300).

2. The waterproof sealing layer for a photovoltaic solar cell backsheet as described in claim 1, characterized in that: The back panel body (100) has a placement groove on its rear side. The left and right sides of the placement groove are respectively connected to the rear sides of two sets of sliding mounting grooves (120). The top and bottom of the placement groove are provided with sealant. The height of the placement groove matches the thickness of the waterproof board (400).

3. The waterproof sealing layer for a photovoltaic solar cell backsheet as described in claim 2, characterized in that: The sliding mounting groove (120) and the drainage groove (121) are an integral structure. The width of the drainage groove (121) is equal to the width of the sliding mounting groove (120). The height of the sliding mounting groove (120) matches the thickness of the sliding mounting strip (411). The width of the sliding mounting groove (120) is equal to the width of the sliding mounting strip (411). The front side of the drainage groove (121) penetrates the front of the back panel body (100).

4. The waterproof sealing layer for a photovoltaic solar cell backsheet as described in claim 3, characterized in that: The waterproof membrane (400) is made of acrylic. The length of the waterproof membrane (400) is equal to the distance between the front side of the sliding mounting groove (120) and the rear side of the placement groove. The horizontal height of the front side of the waterproof membrane (400) is equal to the horizontal height of the bottom of the drain outlet (302).

5. The waterproof sealing layer for a photovoltaic solar cell backsheet as described in claim 1, characterized in that: The top of the clamping plate (200) has three sets of fixing grooves (210) arranged from front to back. The top of the fixing groove (210) is provided with a sealing groove. The bottom of the sealing groove is connected to the top of the fixing groove (210). A rubber layer is glued to the inside of the sealing groove. A fixing bolt is installed inside the fixing groove (210) by means of threaded connection. The radius of the top of the fixing bolt matches the radius of the sealing groove. The top of the metal edging (410) and the bottom of the fixing groove (210) are respectively provided with screw-in grooves, and the screw-in grooves are the same as the fixing groove (210).

6. The waterproof sealing layer for a photovoltaic solar cell backsheet as described in claim 1, characterized in that: The sealing plate (300) has a fixing groove (301) on the upper and lower positions on the left and right sides respectively. The fixing groove (301) passes through the sealing strip (320). The back plate body (100) opposite to the fixing groove (301) has a through hole. The hole has the same specifications as the fixing groove (301). The outside of the hole is provided with a fixing bolt (2) that matches the specifications of the hole.

7. The waterproof sealing layer for a photovoltaic solar cell backsheet as described in claim 1, characterized in that: The sealing strip one (220), sealing strip two (320) and sealing plate (310) are all made of rubber. The shape of the sealing plate (310) matches the shape of the sealing plate (300), and the width of the sealing plate (300) matches the width of the waterproof plate (400).

Images