Photovoltaic module convenient to package
By designing staggered protrusions and protrusions in the packaging film of photovoltaic modules and fitting anti-slip protrusions and grooves on the surface, the problem of slippage during photovoltaic module packaging is solved and the product yield is improved and quality.
Patent Information
- Application Number
- CN202421016230.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-10
AI Technical Summary
Slips are prone to occur during photovoltaic module packaging, resulting in a decrease in product yield.
The upper and lower layers of encapsulating films are respectively equipped with protrusions and protrusions in contact with the battery cell, glass or back plate, arranged interlaced to increase friction, and non-slip protrusions and grooves are distributed on the surface to fit, strengthening the film. friction between them.
It effectively increases the friction between the packaging film and the battery cell and glass, prevents slippage, reduces the problem of cell offset, and improves product quality.
Smart Images
Figure CN222509883U_ABST
Abstract
Description
[Technical field]
[0001] The utility model belongs to the field of photovoltaic technology, and specifically relates to photovoltaic packaging technology. [Background technology]
[0002] Photovoltaic modules convert solar energy into electrical energy and are an important part of photovoltaic power generation systems. The main raw materials of photovoltaic modules include solar cells, welding strips, encapsulation films, glass, backplanes, junction boxes, frames, etc. The encapsulation films are located on the upper and lower sides of the solar cells. Their main function is to bond the solar cells, front panel materials (glass), and back panel materials (glass or backplane) together to provide encapsulation and protection for the modules. Encapsulation films are made of different materials such as EVA and POE. POE is widely used in products such as N-type modules and double-glass modules because of its better electrical insulation, water vapor barrier and PID resistance. However, the viscoelasticity of the POE material itself is low, and the POE internal additives are easily precipitated onto the surface of the film, resulting in a decrease in the friction coefficient of the film surface. Slippage is likely to occur during the module encapsulation process, reducing the product yield. [Contents of the utility model]
[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a photovoltaic module that is easy to package and solve the problem of slippage that is prone to occur during the packaging process of the photovoltaic module.
[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a photovoltaic module that is convenient for packaging, comprising a back plate, a battery cell laid on the back plate, and a glass covering the battery cell, a lower packaging film is provided between the back plate and the battery cell, an upper packaging film is provided between the glass and the battery cell, the upper packaging film is provided with a first contact surface in contact with the battery cell and a second contact surface away from the battery cell, a plurality of first protrusions are distributed on the first contact surface, a plurality of second protrusions are distributed on the second contact surface, the first protrusions and the second protrusions are arranged alternately in the horizontal direction, and the first protrusions are embedded in the adjacent battery cells. In the gap between the cells, the second protrusion corresponds to the horizontal position of the cell; the lower packaging film is provided with a third contact surface in contact with the cell and a fourth contact surface away from the cell, a plurality of third protrusions are distributed on the third contact surface, a plurality of fourth protrusions are distributed on the fourth contact surface, the third protrusions and the fourth protrusions are arranged alternately in the horizontal direction, the third protrusion is embedded in the gap between adjacent cell cells, and the fourth protrusion corresponds to the horizontal position of the cell; one of the first protrusion and the third protrusion has an anti-slip protrusion on its surface, and the other has an anti-slip groove on its surface, and the anti-slip protrusion is embedded in the anti-slip groove.
[0005] Preferably, the cross-sections of the first protrusion and the third protrusion are isosceles trapezoidal structures.
[0006] Preferably, the cross-section of the anti-slip protrusion is rectangular at the bottom and arc-shaped at the top.
[0007] Preferably, the height of the anti-slip protrusion is 0.02-0.05 mm, and the width of the lower part is 0.02-0.05 mm.
[0008] Preferably, the first protrusion and the third protrusion have a trapezoidal cross-section with a lower base length of 1 to 2 mm, an upper base length of 0.5 to 1 mm, and a height of 0.1 to 0.12 mm.
[0009] Preferably, the cross-sections of the second protrusion and the fourth protrusion are isosceles trapezoids, and the length of the upper base of the trapezoid is the same as the length and width of the battery cell.
[0010] Preferably, the lower base of the trapezoid is 0.5 to 1 mm longer than the upper base, and the height is 0.1 to 0.12 mm.
[0011] Preferably, the first protrusion and the third protrusion are interference fit with the gap between two adjacent battery sheets.
[0012] Preferably, the upper packaging film and the lower packaging film are both made of POE material.
[0013] The utility model adopts the above technical solution and has the following beneficial effects:
[0014] 1. Since the upper packaging film is provided with a first protrusion in contact with the battery cell and a second protrusion in contact with the glass; the lower packaging film is provided with a third protrusion in contact with the battery cell and a fourth protrusion in contact with the back plate, the friction between the packaging film and the battery cell and the glass can be increased, and a good anti-slip effect is achieved.
[0015] Furthermore, since the first protrusion and the third protrusion correspond to each other and are both embedded in the gaps between adjacent battery cells, during lamination, the anti-slip protrusions are embedded in the anti-slip grooves, which increases the friction between the upper and lower layers of the film and effectively reduces the problem of battery cell offset during component preparation.
[0016] Therefore, the above technical solution can effectively reduce the problem of cell offset during component preparation and improve product quality.
[0017] In addition, the first protrusion and the second protrusion are arranged alternately in the horizontal direction, and the protrusion directions are opposite in the vertical direction, and the third protrusion and the fourth protrusion are arranged alternately in the horizontal direction, and the protrusion directions are opposite in the vertical direction. Therefore, the stress of the packaging film in the horizontal and vertical directions can be released, making the film less likely to slip during the laying and lamination process, facilitating the process, reducing preparation defects, and improving product quality.
[0018] 2. The cross-section of the first and third protrusions is an isosceles trapezoidal structure. Since the first and third protrusions match the gap between two adjacent battery cells, this cross-section is the width cross-section. During the assembly laying process, the first protrusion on the first contact surface of the upper packaging film corresponds to the cell gap of the battery cell. The isosceles trapezoidal design with a narrow bottom and a wide top allows the first and third protrusions to be better embedded in the cell / string gap, increasing the friction between the film and the battery cell.
[0019] 3. The above-mentioned arc-shaped upper part of the anti-skid protrusion makes the film easier to slide in a small range. During the sliding process, the anti-skid protrusion can be better embedded in the anti-skid groove, further increasing the friction between the two layers of film and better positioning the battery cell, making it difficult for the battery cell to shift during the lamination process.
[0020] 4. The cross-section of the second protrusion and the fourth protrusion is an isosceles trapezoidal structure, and the length of the upper base of the trapezoid is the same as the length and width of the battery cell, thereby ensuring that the bottom of the second protrusion and the fourth protrusion completely covers the battery cell, and the friction between the adhesive film and the glass and the back panel can be increased by designing the protrusion height.
[0021] 5. POE film has the advantages of excellent heat resistance, good compressive resistance, and a wide application temperature range, which has obvious advantages over EVA film.
[0022] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings.
Brief Description of the Drawings
[0023] The utility model is further described below in conjunction with the accompanying drawings:
[0024] Figure 1 It is a schematic diagram of the cross-sectional structure of a photovoltaic module in a separated state;
[0025] Figure 2 is a top view of the first protrusion and the third protrusion;
[0026] Figure 3 is a top view of the second protrusion and the fourth protrusion;
[0027] Figure 4 is a cross-sectional view of a first protrusion;
[0028] Figure 5 is a cross-sectional view of the third protrusion;
[0029] Figure 6 is a side view of the second protrusion and the fourth protrusion;
[0030] Figure numerals: back panel 100, lower packaging film 200, battery cell 300, upper packaging film 400, glass 500, first contact surface 1, second contact surface 2, first protrusion 3, second protrusion 4, third contact surface 5, fourth contact surface 6, third protrusion 7, fourth protrusion 8, first isosceles trapezoidal structure 9, anti-slip protrusion 10, second isosceles trapezoidal structure 11, anti-slip groove 12. [Specific implementation method]
[0031] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.
[0032] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.
[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0034] The terms "first", "second", etc. in the present utility model are used to distinguish similar objects rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first".
[0035] Reference Figures 1 to 6 As shown, this embodiment provides a photovoltaic module that is easy to package, including a backplane 100, a battery cell 300 laid on the backplane, and a glass 500 covering the battery cell. A lower packaging film 200 is provided between the backplane 100 and the battery cell 300, and an upper packaging film 400 is provided between the glass 500 and the battery cell 300.
[0036] Among them, the upper packaging film 400 is provided with a first contact surface 1 in contact with the battery cell 300 and a second contact surface 2 away from the battery cell, the first contact surface 1 is distributed with a plurality of first protrusions 3, the second contact surface 2 is distributed with a plurality of second protrusions 4, and the first protrusions 3 and the second protrusions 4 are arranged alternately in the horizontal direction, and the lower packaging film 200 is provided with a third contact surface 5 in contact with the battery cell 300 and a fourth contact surface 6 away from the battery cell, the third contact surface 5 is distributed with a plurality of third protrusions 7, the fourth contact surface 6 is distributed with a plurality of fourth protrusions 8, and the third protrusions 7 and the fourth protrusions 8 are arranged alternately in the horizontal direction.
[0037] like Figure 2 As shown, the shaded part is the first protrusion 3 or the third protrusion 7, and the shaded part is located between two adjacent battery cells 300, that is, the first protrusion 3 and the third protrusion 7 are embedded in the gap between adjacent battery cells and the gap between battery strings. In addition, the first protrusion 3 and the third protrusion 7 are interference fit with the gap between two adjacent battery cells, thereby effectively reducing the problem of battery cell offset during the assembly preparation process.
[0038] Furthermore, the surface of the first protrusion 3 is provided with anti-skid protrusions 10, and the surface of the third protrusion 7 is provided with anti-skid grooves 12, and the anti-skid protrusions 10 are engaged with the anti-skid grooves 12. Of course, the positions of the anti-skid protrusions 10 and the anti-skid grooves 12 on the first protrusion 3 and the third protrusion 7 can be interchanged.
[0039] like Figure 3 As shown, the shaded portion is the second protrusion 4 or the fourth protrusion 8. The shaded portion covers the battery cell. That is, the second protrusion 4 and the fourth protrusion 8 correspond to the horizontal position of the battery cell 300.
[0040] Since the upper packaging film is provided with a first protrusion that contacts the battery cell and a second protrusion that contacts the glass; the lower packaging film is provided with a third protrusion that contacts the battery cell and a fourth protrusion that contacts the back panel, the friction between the packaging film and the battery cell and the glass can be increased, which has a good anti-slip effect.
[0041] Furthermore, since the first protrusion and the third protrusion correspond to each other and are both embedded in the gaps between adjacent battery cells, during lamination, the anti-slip protrusions are embedded in the anti-slip grooves, which increases the friction between the upper and lower layers of the film and effectively reduces the problem of battery cell offset during component preparation.
[0042] Therefore, the above technical solution can effectively reduce the problem of cell offset during component preparation and improve product quality.
[0043] In addition, the first protrusion and the second protrusion are arranged alternately in the horizontal direction, and the protrusion directions are opposite in the vertical direction, and the third protrusion and the fourth protrusion are arranged alternately in the horizontal direction, and the protrusion directions are opposite in the vertical direction. Therefore, the stress of the packaging film in the horizontal and vertical directions can be released, making the film less likely to slip during the laying and lamination process, facilitating the process, reducing preparation defects, and improving product quality.
[0044] Specifically, Figure 4 and Figure 5 As shown, the cross-section of the first protrusion 3 and the third protrusion 7 is a first isosceles trapezoidal structure 9. Since the first protrusion and the third protrusion match the gap between two adjacent battery cells, this cross-section is the width cross-section. During the assembly laying process, the first protrusion on the first contact surface of the upper packaging film corresponds to the cell gap and string gap of the battery cell. The isosceles trapezoidal design with a narrow bottom and a wide top allows the first protrusion and the third protrusion to be better embedded in the cell / string gap, thereby increasing the friction between the film and the battery cell.
[0045] Furthermore, the cross-section of the anti-skid protrusion 10 is rectangular at the bottom and arc-shaped at the top. The height of the anti-skid protrusion 12 is 0.02-0.05 mm, and the width of the bottom is 0.02-0.05 mm. The trapezoidal lower base length of the first protrusion 3 and the third protrusion 7 is 1-2 mm, the upper base length is 0.5-1 mm, and the height is 0.1-0.12 mm. The above-mentioned arc-shaped upper part of the anti-skid protrusion makes the film easier to slide in a small range, and the anti-skid protrusion can be better embedded in the anti-skid groove during the sliding process, further increasing the friction between the two layers of film, and better positioning the battery cell, so that the battery cell is not easy to shift during the lamination process.
[0046] Specifically, Figure 6 As shown, the cross-section of the second protrusion 4 and the fourth protrusion 8 is a second isosceles trapezoidal structure 11, and the length of the upper base of the trapezoid is the same as the length and width of the battery cell. Furthermore, the lower base of the trapezoid is 0.5-1mm longer than the upper base, and the height is 0.1-0.12mm. This ensures that the bottom of the second protrusion and the fourth protrusion completely covers the battery cell, and the friction between the adhesive film and the glass and the back panel can be increased by designing the protrusion height.
[0047] Referring to the technology, the upper encapsulation film 400 and the lower encapsulation film 200 are both made of POE material. The performance characteristics of POE film are mainly reflected in the following aspects:
[0048] 1. Excellent heat resistance: In high temperature environment, POE film can still maintain good mechanical properties and thermal conductivity, which helps to improve the service life of the product.
[0049] 2. Good compressive resistance: When subjected to pressure, POE film can maintain stable thermal conductivity, which helps to meet the challenges of various application scenarios.
[0050] 3. Wide application temperature range: POE film can maintain good thermal conductivity in the temperature range of -40 to 150, showing its excellent adaptability.
[0051] 4. Environmentally friendly and pollution-free: The production process of POE film is environmentally friendly and pollution-free, which helps to achieve green production.
[0052] 5. POE film also performs well in terms of multi-volume resistivity, water vapor permeability, aging resistance, and resistance to potential induced degradation (PID), and has obvious advantages over EVA film.
[0053] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.
Claims
1. A photovoltaic module that is convenient for packaging, comprising a backplane, a battery cell laid on the backplane, and glass covering the battery cell, wherein a lower packaging film is provided between the backplane and the battery cell, and an upper packaging film is provided between the glass and the battery cell, characterized in that: The upper packaging film is provided with a first contact surface in contact with the battery cell and a second contact surface away from the battery cell, the first contact surface is provided with a plurality of first protrusions, the second contact surface is provided with a plurality of second protrusions, the first protrusions and the second protrusions are arranged alternately in the horizontal direction, the first protrusion is embedded in the gap between adjacent battery cells, and the second protrusion corresponds to the horizontal position of the battery cell; the lower packaging film is provided with a third contact surface in contact with the battery cell and a fourth contact surface away from the battery cell, the third contact surface is provided with a plurality of third protrusions, the fourth contact surface is provided with a plurality of fourth protrusions, the third protrusions and the fourth protrusions are arranged alternately in the horizontal direction, the third protrusion is embedded in the gap between adjacent battery cells, and the fourth protrusion corresponds to the horizontal position of the battery cell; one of the first protrusion and the third protrusion is provided with anti-slip protrusions on its surface, and the other one is provided with anti-slip grooves on its surface, and the anti-slip protrusions are embedded in the anti-slip grooves.
2. A conveniently packaged photovoltaic module according to claim 1, characterized in that: The cross-sections of the first protrusion and the third protrusion are isosceles trapezoidal structures.
3. A conveniently packaged photovoltaic module according to claim 2, characterized in that: The cross section of the anti-slip protrusion is rectangular at the bottom and arc-shaped at the top.
4. A conveniently packaged photovoltaic module according to claim 3, characterized in that: The height of the anti-slip protrusion is 0.02-0.05 mm, and the width of the lower part is 0.02-0.05 mm.
5. A conveniently packaged photovoltaic module according to claim 2, characterized in that: The first and third protrusions have trapezoidal cross-sections with a lower base length of 1 to 2 mm, an upper base length of 0.5 to 1 mm, and a height of 0.1 to 0.12 mm.
6. A conveniently packaged photovoltaic module according to claim 1, characterized in that: The cross-sections of the second protrusion and the fourth protrusion are isosceles trapezoids, and the length of the upper base of the trapezoid is the same as the length and width of the battery cell.
7. A conveniently packaged photovoltaic module according to claim 6, characterized in that: The lower base of the trapezoid is 0.5 to 1 mm longer than the upper base, and the height is 0.1 to 0.12 mm.
8. A conveniently packaged photovoltaic module according to claim 1, characterized in that: The first protrusion and the third protrusion are interference-fitted with the gap between two adjacent battery sheets.
9. A conveniently packaged photovoltaic module according to claim 1, characterized in that: The upper packaging film and the lower packaging film are both made of POE material.