Photovoltaic module
By setting gradient thickness through wire holes on the backplane glass of photovoltaic module and changing the stress mode, the burst risk caused by the increase in the stress position of the backplane glass through wire hole is solved, and the stress concentration and service life are achieved. Effect.
Patent Information
- Application Number
- CN202420226076.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-01-30
AI Technical Summary
In existing photovoltaic modules, the over-wire hole position of the backplane glass increases, resulting in the risk of glass burst.
By setting a through-line hole with a gradient thickness along its thickness direction on the back plate glass of the photovoltaic module and connecting it with the positive plate glass through the encapsulated film, the stress mode of the back plate glass is changed, and the force mode of the back plate glass is changed from uniform stress to gradient stress .
The stress concentration of the through-line holes of the backplane glass is reduced, the stress on the backplane glass is reduced, the service life of the backplane glass is extended, and the risk of burst is reduced.
Smart Images
Figure CN222485194U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic component. Background Art
[0002] With the update of photovoltaic module technology, different versions are launched, and various sizes of batteries are gradually updated, such as 182, 210 and other versions. The 182R version is a new version launched by most companies. Compared with the previous 182 version, the long side frame of the 182R version is lengthened. This design will lead to increased stress on the back panel glass wire hole during actual module installation, increasing the risk of glass bursting. The main reason for the bursting of the back panel glass wire hole is that as the stress on the back panel glass increases, its maximum stress point is concentrated on the back panel glass wire hole, resulting in a small area under greater stress, causing the pressure to increase sharply, and eventually exceeding the maximum pressure that the back panel glass can withstand, causing the glass to burst.
[0003] In the prior art, the glass used in photovoltaic modules is rectangular glass. The advantage of this type of glass is that it bears uniform force. It is precisely this uniform force that, when the photovoltaic module is subjected to greater pressure, the force is evenly transferred to the wire holes of the glass, causing stress concentration and leading to bursting. Utility Model Content
[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a photovoltaic module, which changes the original uniform force to a gradient force, which can increase the force area of the back plate glass, thereby reducing the stress concentration of the wire hole of the back plate glass, and can also reduce the force on the back plate glass, thereby increasing the service life of the back plate glass.
[0005] According to the photovoltaic module of the embodiment of the utility model, it includes: a front glass plate; a battery cell, one side of the battery cell is connected to the front glass plate by a first packaging film; a back glass plate, the other side of the battery cell is connected to the back glass plate by a second packaging film, the back glass plate is provided with a wire hole passing through along the thickness direction thereof, the back glass plate has a first end and a second end opposite to each other in a first direction, and the thickness of the back glass plate increases in the first direction from the first end to the second end.
[0006] As a result, the photovoltaic module changes from the original uniform stress to gradient stress, which can increase the stress area of the back panel glass, thereby reducing the stress concentration of the wire holes of the back panel glass, and can also reduce the force on the back panel glass and increase the service life of the back panel glass.
[0007] According to some embodiments of the utility model, the back panel glass has a third end and a fourth end opposite to a second direction, the cross-section of the back panel glass perpendicular to the second direction is trapezoidal, and the first direction, the second direction and the thickness direction of the back panel glass are perpendicular to each other.
[0008] According to some embodiments of the present invention, the front side of the back panel glass is adjacent to the battery cell and the back side is away from the battery cell, the angle between the back side of the back panel glass and the first end edge of the back panel glass is a right angle, and the angle between the front side of the back panel glass and the first end edge of the back panel glass is an obtuse angle.
[0009] According to some embodiments of the present invention, the angle between the side surface of the second packaging film facing the back panel glass and the first end edge of the back panel glass is the same as the angle between the front side of the back panel glass and the first end edge of the back panel glass.
[0010] According to some embodiments of the present invention, the positive glass has a fifth end and a sixth end opposite to each other in a first direction, the fifth end corresponds to the first end and the sixth end corresponds to the second end, and the thickness of the positive glass increases gradually in the first direction from the fifth end to the sixth end.
[0011] According to some embodiments of the present invention, the positive glass has a seventh end and an eighth end opposite to each other in a second direction, the cross-section of the positive glass perpendicular to the second direction is trapezoidal, and the first direction, the second direction and the thickness direction of the positive glass are perpendicular to each other.
[0012] According to some embodiments of the present invention, the back side of the front glass is adjacent to the battery cell and the front side is away from the battery cell, the angle between the front side of the front glass and the fifth end edge of the front glass is a right angle, and the angle between the back side of the front glass and the fifth end edge of the front glass is an obtuse angle.
[0013] According to some embodiments of the present invention, the angle between the surface of the first packaging film facing the front glass and the first end edge of the front glass is the same as the angle between the back surface of the front glass and the fifth end edge of the front glass.
[0014] According to some embodiments of the present invention, the thickness of the fifth end of the front glass is d1, the thickness of the sixth end of the front glass is d2, d1 and d2 satisfy the relationship: 1.6mm≤d1≤1.7mm, 1.75mm≤d2≤1.85mm; and / or the thickness of the first end of the back glass is d3, the thickness of the second end of the back glass is d4, d3 and d4 satisfy the relationship: 2.3mm≤d3≤2.4mm, 2.45mm≤d4≤2.55mm.
[0015] According to some embodiments of the utility model, the battery cell, the first packaging film and the second packaging film have a ninth end and a tenth end opposite to each other in a first direction, the thickness of the ninth end of the battery cell, the first packaging film and the second packaging film is d5, the thickness of the tenth end of the battery cell, the first packaging film and the second packaging film is d6, and d5 and d6 satisfy the relationship: 0.7mm≤d5≤0.9mm, 0.4mm≤d6≤0.6mm.
[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:
[0018] Figure 1 It is a structural schematic diagram of the thickness variation of the back plate glass in the photovoltaic module according to the embodiment of the utility model;
[0019] Figure 2 It is a schematic diagram of the partial structure of a photovoltaic module according to an embodiment of the utility model.
[0020] Reference numerals:
[0021] 100. Photovoltaic modules;
[0022] 10. front glass; 11. fifth end; 12. sixth end; 13. seventh end; 14. eighth end;
[0023] 20. first packaging film; 21. ninth end; 22. tenth end;
[0024] 30. Back glass; 31. Second packaging film; 32. Wire hole;
[0025] 33, first end; 34, second end; 35, third end; 36, fourth end;
[0026] 40. Junction box. DETAILED DESCRIPTION
[0027] Embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.
[0028] Reference below Figure 1-Figure 2 A photovoltaic assembly 100 according to an embodiment of the present invention is described.
[0029] like Figure 1 As shown, according to the photovoltaic module 100 of the embodiment of the utility model, it includes: a front glass 10, a battery cell and a back glass 30, one side of the battery cell is connected to the front glass 10 through a first packaging film 20, and the other side of the battery cell is connected to the back glass 30 through a second packaging film 31, and the back glass 30 is provided with a wire hole 32 passing through along the thickness direction thereof, and the back glass 30 has a first end 33 and a second end 34 opposite to each other in a first direction, and the thickness of the back glass 30 increases in the first direction from the first end 33 to the second end 34.
[0030] Specifically, the back glass in the traditional photovoltaic module has a through hole. During the actual installation of the photovoltaic module, the stress on the hole of the back glass will increase, which increases the risk of the back glass bursting. Since the position of the through hole of the back glass will produce stress concentration during the stress process, the maximum stress point is concentrated at the hole of the back glass, resulting in a small area to bear a large stress. When the stress on the through hole of the back glass is greater than the maximum stress borne by the back glass, the back glass will burst. In addition, the front glass and back glass of the traditional photovoltaic module are rectangular glasses with uniform thickness. The stress on the front glass and back glass is relatively uniform. Under such uniform stress, when the photovoltaic module is subjected to a large pressure, the pressure will be evenly transmitted to the through hole of the back glass. The through hole of the back glass will produce stress concentration. When the through hole of the back glass exceeds the maximum stress borne, the back glass will burst.
[0031] Therefore, it is necessary to optimize the structure of the front glass 10 and the back glass 30 in the photovoltaic module 100. The thickness of the back glass 30 in the photovoltaic module 100 gradually increases from the first end 33 to the second end 34 in the first direction, and the force on the back glass 30 changes from the original uniform force to a gradient force. In this way, the force area of the back glass 30 can be increased, thereby reducing the stress concentration of the wire hole 32 of the back glass 30, and also reducing the force on the back glass 30, thereby improving the service life of the back glass 30.
[0032] As a result, the photovoltaic module 100 changes from the original uniform stress to gradient stress, which can increase the stress area of the back panel glass 30, thereby reducing the stress concentration of the wire hole 32 of the back panel glass 30, and can also reduce the force on the back panel glass 30 and increase the service life of the back panel glass 30.
[0033] According to some embodiments of the present invention, Figure 1 As shown, the back glass 30 has a third end 35 and a fourth end 36 opposite to each other in the second direction, the cross section of the back glass 30 perpendicular to the second direction is trapezoidal, and the first direction, the second direction and the thickness direction of the back glass 30 are perpendicular to each other.
[0034] Among them, the direction of the back panel glass 30 from the third end 35 to the fourth end 36 is the second direction, and the cross-section of the back panel glass 30 perpendicular to the second direction is a trapezoid, and the trapezoidal back panel glass 30 is subjected to gradient force. In this way, the gradient force of the back panel glass 30 can be optimized according to the actual load-bearing requirements of the back panel glass 30 structure, which can enhance the structural stability of the back panel glass 30 and reduce the possible stress concentration problem, thereby reducing the cracks and damage that may occur at the wire hole 32 of the back panel glass 30 during the force process, and can also improve the safety and durability of the photovoltaic module 100. Furthermore, the gradient force of the back panel glass 30 can be optimized according to the layout and lighting conditions of the photovoltaic module 100, which helps to improve the efficiency of the photovoltaic module 100 in receiving light energy. Moreover, the gradient force can make the use of the material of the back panel glass 30 in the force direction more reasonable, which can reduce material waste and reduce manufacturing costs.
[0035] According to some embodiments of the present invention, Figure 1 As shown, the front side of the back panel glass 30 is adjacent to the battery cell, and the back side of the back panel glass 30 is away from the battery cell, the angle between the back side of the back panel glass 30 and the edge of the first end 33 of the back panel glass 30 is a right angle, and the angle between the front side of the back panel glass 30 and the edge of the first end 33 of the back panel glass 30 is an obtuse angle.
[0036] Among them, the angle between the back side of the back panel glass 30 and the edge of the first end 33 of the back panel glass 30 is a right angle, which can facilitate the installation of the back panel glass 30, and the angle between the front side of the back panel glass 30 and the edge of the first end 33 of the back panel glass 30 is an obtuse angle, so that the thickness of the back panel glass 30 at the first end 33 can change in a trapezoidal shape.
[0037] According to some embodiments of the present invention, Figure 1 As shown, the angle between the side surface of the second encapsulating film 31 facing the back glass 30 and the edge of the first end 33 of the back glass 30 is the same as the angle between the front surface of the back glass 30 and the edge of the first end 33 of the back glass 30. In this way, the second encapsulating film 31 can be more closely matched with the back glass 30, thereby ensuring the strength of the back glass 30.
[0038] According to some embodiments of the present invention, Figure 1As shown, the positive glass 10 has a fifth end 11 and a sixth end 12 opposite to each other in a first direction, the fifth end 11 corresponds to the first end 33, and the sixth end 12 corresponds to the second end 34. In the first direction from the fifth end 11 to the sixth end 12, the thickness of the positive glass 10 increases.
[0039] Among them, the fifth end 11 of the front glass 10 corresponds to the first end 33 of the back glass 30, and the fifth end 11 of the front glass 10 and the first end 33 of the back glass 30 are flush with each other, so that stress concentration can be avoided between the fifth end 11 of the front glass 10 and the first end 33 of the back glass 30 during the force application process, and damage can also be prevented between the fifth end 11 of the front glass 10 and the first end 33 of the back glass 30, thereby ensuring the strength of the fifth end 11 of the front glass 10 and the first end 33 of the back glass 30.
[0040] In addition, the thickness of the front glass 10 increases uniformly in the first direction from the fifth end 11 to the sixth end 12 , so that the thickness of the front glass 10 decreases uniformly during the stress process, thereby reducing the stress on the front glass 10 .
[0041] According to some embodiments of the present invention, Figure 1 As shown, the front glass 10 has a seventh end 13 and an eighth end 14 opposite to each other in the second direction, the cross section of the front glass 10 perpendicular to the second direction is trapezoidal, and the first direction, the second direction and the thickness direction of the front glass 10 are perpendicular to each other.
[0042] Among them, the front plate glass 10 is subjected to gradient stress, and the gradient stress of the front plate glass 10 can be optimized according to the actual load-bearing requirements of the structure of the front plate glass 10, which can enhance the structural stability of the front plate glass 10 and reduce possible stress concentration problems, thereby reducing possible cracks and breakages of the front plate glass 10 during stress, and improving the safety and durability of the photovoltaic module 100. Furthermore, the gradient stress of the front plate glass 10 can be optimized according to the layout and lighting conditions of the photovoltaic module 100, which helps to improve the efficiency of the photovoltaic module 100 in receiving light energy. Moreover, the gradient stress can make the use of the material of the front plate glass 10 in the stress direction more reasonable, which can reduce material waste and reduce manufacturing costs.
[0043] According to some embodiments of the present invention, Figure 1 As shown, the back side of the front glass 10 is adjacent to the battery cell, and the front side of the front glass 10 is away from the battery cell, the angle between the front side of the front glass 10 and the edge of the fifth end 11 of the front glass 10 is a right angle, and the angle between the back side of the front glass 10 and the edge of the fifth end 11 of the front glass 10 is an obtuse angle.
[0044] Among them, the front side of the front glass 10 is the side of the front glass 10 that receives sunlight, and the angle between the front side of the front glass 10 and the edge of the fifth end 11 of the front glass 10 is a right angle, which can facilitate the installation of the front glass 10, and the angle between the back side of the front glass 10 and the edge of the fifth end 11 of the front glass 10 is an obtuse angle, so that the thickness of the fifth end 11 of the front glass 10 can change in a trapezoidal shape.
[0045] According to some embodiments of the present invention, Figure 1 As shown, the angle between the surface of the first encapsulating film 20 facing the front glass 10 and the edge of the first end 33 of the front glass 10 is the same as the angle between the back surface of the front glass 10 and the edge of the fifth end 11 of the front glass 10. In this way, the first encapsulating film 20 can be more closely matched with the front glass 10, thereby ensuring the strength of the front glass 10.
[0046] According to the specific embodiment of the utility model, Figure 1 and Figure 2 As shown, the thickness of the fifth end 11 of the front glass 10 is d1, the thickness of the sixth end 12 of the front glass 10 is d2, d1 and d2 satisfy the relationship: 1.6mm≤d1≤1.7mm, 1.75mm≤d2≤1.85mm, and / or the thickness of the first end 33 of the back glass 30 is d3, the thickness of the second end 34 of the back glass 30 is d4, d3 and d4 satisfy the relationship: 2.3mm≤d3≤2.4mm, 2.45mm≤d4≤2.55mm.
[0047] Specifically, the thickness d1 of the fifth end 11 of the front glass 10 can be 1.65 mm, and the thickness d2 of the sixth end 12 of the front glass 10 can be 1.8 mm, so that the thickness of the front glass 10 can be uniformly increased in a gradient. The thickness d3 of the first end 33 of the back glass 30 can be 2.35 mm, and the thickness d4 of the second end 34 of the back glass 30 can be 2.5 mm, so that the thickness of the back glass 30 can be uniformly increased in a gradient.
[0048] Furthermore, in the conventional photovoltaic module 100, when the thickness of the front glass 10 is set to 1.8 mm, the thickness of the back glass 30 is set to 2.5 mm, and the overall thickness of the first packaging film 20, the battery cell and the second packaging film 31 is set to 0.5 mm, under the load of 2400 pa, the stress of the back glass 30 is 85.18 MPa, and the stress point of the back glass 30 is at the wire hole 32. This is because the thickness of the glass is uniform, resulting in stress concentration at the wire hole 32, resulting in greater stress at this location. When the thickness of the fifth end 11 of the front glass 10 is set to be lower than 0.15 mm of the thickness of the sixth end 12 of the front glass 10, and the thickness of the first end 33 of the back glass 30 is set to be lower than 0.15 mm of the thickness of the second end 34 of the back glass 30, the stress of the back glass 30 is reduced from 85.81 MPa to 70.47 MPa, thereby reducing the stress of the back glass 30. It can be seen from the maximum stress point of the back glass 30 that the stress position is transferred from the wire hole 32 to the surrounding of the junction box 40. This is because the thickness of the front glass 10, the back glass 30 and the packaging film are changed in a trapezoidal shape, so that the back glass 30 can be changed from being uniformly stressed to being gradient stressed. In this way, the stressed area can be increased, thereby reducing the stress of the back glass 30, reducing the stress of the back glass 30, and reducing the risk of the back glass 30 bursting.
[0049] In addition, the contact and cooperation between the junction box 40 and the round tube bracket can increase the contact area and the connection strength, thereby reducing the stress at the connection between the junction box 40 and the back panel glass 30.
[0050] According to some embodiments of the present invention, Figure 1 As shown, the battery cell, the first packaging film 20 and the second packaging film 31 have a ninth end 21 and a tenth end 22 opposite to each other in the first direction, the thickness of the ninth end 21 of the battery cell, the first packaging film 20 and the second packaging film 31 is d5, and the thickness of the tenth end 22 of the battery cell, the first packaging film 20 and the second packaging film 31 is d6, and d5 and d6 satisfy the relationship: 0.7mm≤d5≤0.9mm, 0.4mm≤d6≤0.6mm.
[0051] Among them, the thickness d5 of the battery cell, the first packaging film 20 and the second packaging film 31 at the ninth end 21 can be 0.8 mm, and the thickness of the battery cell, the first packaging film 20 and the second packaging film 31 at the tenth end 22 can be 0.5 mm. In this way, the overall thickness of the battery cell, the first packaging film 20 and the second packaging film 31 in the first direction can be uniformly reduced, thereby reducing the overall force on the battery cell, the first packaging film 20 and the second packaging film 31.
[0052] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.
[0054] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.
Claims
1. A photovoltaic module, characterized in that: include: Front glass; A battery cell, one side of which is connected to the front glass via a first packaging film; The back panel glass, the other side of the battery cell is connected to the back panel glass through a second packaging film, the back panel glass is provided with a wire hole penetrating along the thickness direction thereof, the back panel glass has a first end and a second end opposite to each other in a first direction, and the thickness of the back panel glass increases gradually in the first direction from the first end to the second end.
2. The photovoltaic module according to claim 1, characterized in that: The back panel glass has a third end and a fourth end opposite to each other in a second direction. The cross section of the back panel glass perpendicular to the second direction is trapezoidal. The first direction, the second direction and the thickness direction of the back panel glass are perpendicular to each other.
3. The photovoltaic module according to claim 2, characterized in that: The front side of the back panel glass is adjacent to the battery cell and the back side is away from the battery cell. The angle between the back side of the back panel glass and the first end edge of the back panel glass is a right angle, and the angle between the front side of the back panel glass and the first end edge of the back panel glass is an obtuse angle.
4. The photovoltaic module according to claim 3, characterized in that: The angle between the surface of the second packaging film facing the back panel glass and the first end edge of the back panel glass is the same as the angle between the front surface of the back panel glass and the first end edge of the back panel glass.
5. The photovoltaic module according to claim 1, characterized in that: The positive plate glass has a fifth end and a sixth end opposite to each other in a first direction, the fifth end corresponds to the first end and the sixth end corresponds to the second end, and the thickness of the positive plate glass increases gradually in the first direction from the fifth end to the sixth end.
6. The photovoltaic module according to claim 5, characterized in that: The positive plate glass has a seventh end and an eighth end opposite to each other in a second direction. The cross section of the positive plate glass perpendicular to the second direction is trapezoidal. The first direction, the second direction and the thickness direction of the positive plate glass are perpendicular to each other.
7. The photovoltaic module according to claim 5, characterized in that: The back side of the front glass is adjacent to the battery cell and the front side is away from the battery cell. The angle between the front side of the front glass and the fifth end edge of the front glass is a right angle, and the angle between the back side of the front glass and the fifth end edge of the front glass is an obtuse angle.
8. The photovoltaic module according to claim 7, characterized in that: The angle between the surface of the first packaging film facing the front glass and the first end edge of the front glass is the same as the angle between the back surface of the front glass and the fifth end edge of the front glass.
9. The photovoltaic module according to claim 5, characterized in that: The thickness of the fifth end of the front glass is d1, the thickness of the sixth end of the front glass is d2, d1 and d2 satisfy the relationship: 1.6 mm ≤ d1 ≤ 1.7 mm, 1.75 mm ≤ d2 ≤ 1.85 mm; and / or The thickness of the first end of the back panel glass is d3, and the thickness of the second end of the back panel glass is d4. d3 and d4 satisfy the relationship: 2.3mm≤d3≤2.4mm, 2.45mm≤d4≤2.55mm.
10. The photovoltaic module according to claim 1, characterized in that: The battery cell, the first packaging film and the second packaging film have a ninth end and a tenth end opposite to each other in a first direction, the thickness of the ninth end of the battery cell, the first packaging film and the second packaging film is d5, the thickness of the tenth end of the battery cell, the first packaging film and the second packaging film is d6, and d5 and d6 satisfy the relationship: 0.7mm≤d5≤0.9mm, 0.4mm≤d6≤0.6mm.