Photovoltaic module and backboard structure
By setting the lower package in the backplane structure of the photovoltaic module and fusing it with the lower package film, the problem of loss of the package film in the bus belt area is solved, and the better sealing and longer service life of the photovoltaic module are achieved.
Patent Information
- Application Number
- CN202420120248.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-01-17
AI Technical Summary
In the lamination process of existing photovoltaic modules, since the thickness of the busbar is greater than the thickness of the cell, the area corresponding to the busbar in the packaging film is overpressure and glue-free, which is prone to moisture and heat aging, causing water vapor to enter the module, corrode the battery cells, and reduce performance.
The lower package is arranged in the backplane structure of the photovoltaic module, embedded in the lower package film, and integrated with it to fill the loss of the package film in the bus belt area and improve the sealing of the bus belt area and the edge of the module.
Effectively prevent water vapor from entering the assembly through the confluent belt, prevent battery cells from corrosion, and improve the reliability, durability and service life of photovoltaic modules.
Smart Images
Figure CN222602912U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a photovoltaic component and a back plate structure. Background Art
[0002] At present, in the lamination process of photovoltaic modules, since the thickness of the busbar used to connect the battery strings in the photovoltaic module (about 0.4mm) is greater than the thickness of the battery cell (about 0.13mm), the area corresponding to the busbar in the packaging film will be over-pressurized and lack of glue, causing the area corresponding to the busbar in the packaging film to be more susceptible to moisture and heat aging, causing water vapor to easily enter the module from the area corresponding to the busbar in the packaging film, causing corrosion of the battery cell and performance degradation. Utility Model Content
[0003] In view of this, the utility model provides a photovoltaic module and a backboard structure, wherein the photovoltaic module fills the packaging film through the lower packaging member on the backboard body, so that the edge of the photovoltaic module is completely sealed to prevent water vapor from entering the module through the converging strip.
[0004] In order to solve the above technical problems, the utility model provides the following technical solutions:
[0005] In a first aspect, the utility model provides a photovoltaic module, comprising: a stacked cover plate structure, an upper packaging film, a battery array, a lower packaging film and a back plate structure, wherein:
[0006] The backplane structure comprises: a backplane body and a lower packaging component arranged on the backplane body;
[0007] The lower packaging member is arranged corresponding to the busbar in the battery array;
[0008] The upper packaging film is laid between the cover plate structure and the battery array;
[0009] The lower packaging film is laid between the battery array and the backplane structure;
[0010] The upper packaging film and the lower packaging film are used to package the battery array between the cover plate structure and the back plate structure;
[0011] The lower packaging component is embedded in the lower packaging film during the lamination process of the photovoltaic module and is integrated with the lower packaging film.
[0012] In a second aspect, the embodiment of the utility model provides a backplane structure applied to the photovoltaic module provided by the embodiment of the first aspect, including: a backplane body and a lower packaging member disposed on the backplane body;
[0013] The lower packaging component is arranged corresponding to the busbar in the battery array in the photovoltaic module.
[0014] The technical solution of the first aspect of the above utility model has the following advantages or beneficial effects:
[0015] The backplane structure used in the photovoltaic module provided by the embodiment of the utility model has a lower packaging component arranged on the backplane body, and the lower packaging component is arranged corresponding to the busbar. In the lamination process of the photovoltaic module, the lower packaging component is embedded in the lower packaging film and integrated with the lower packaging film and / or the upper packaging film. On the one hand, the lower packaging component can fill the packaging film lost in the busbar area due to the busbar thickness being greater than the battery cell thickness, so that the packaging film thickness corresponding to the busbar area is filled; on the other hand, the lower packaging component is integrated with the lower packaging film and / or the upper packaging film to further improve the sealing of the busbar area and the edge of the photovoltaic module, avoid water vapor from entering the module through the busbar, thereby avoiding corrosion of the battery cell, so as to effectively improve the reliability, durability and service life of the photovoltaic module.
[0016] In addition, since the lower packaging component and the backplane body are an integrated structure, after the backplane structure is laid on the lower packaging film, the lower packaging component can accurately position the busbar, and during the lamination process, since the lower packaging component and the backplane body are an integrated structure, the lower packaging component can be avoided from shifting, so that the lower packaging component can better fill the lost packaging film. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram showing a first cross-sectional structure of a photovoltaic module provided by an embodiment of the utility model is shown;
[0018] Figure 2 An exploded view of the first structure of a photovoltaic assembly provided by an embodiment of the utility model is shown;
[0019] Figure 3 The utility model embodiment provides an application Figure 1 and Figure 2 A schematic cross-sectional view of a back sheet structure in a photovoltaic module shown;
[0020] Figure 4 The utility model embodiment provides an application Figure 1 and Figure 2 A schematic plan view of a first backsheet structure in a photovoltaic module shown;
[0021] Figure 5 The utility model embodiment provides an application Figure 1 and Figure 2 A schematic plan view of a second backsheet structure in a photovoltaic module shown;
[0022] Figure 6A second structural exploded diagram of a photovoltaic assembly provided by an embodiment of the utility model is shown;
[0023] Figure 7 The utility model embodiment provides an application in Figure 6 A schematic plan view of a back sheet structure in a photovoltaic module shown;
[0024] Figure 8 The back plate structure provided by the embodiment of the utility model is shown along Figure 7 A schematic diagram of the cross-sectional structure of the straight line l1 shown;
[0025] Fig. 9 The back plate structure provided by the embodiment of the utility model is shown along Figure 7 A schematic cross-sectional structure diagram of the straight line l2 shown;
[0026] Fig.10 A second cross-sectional structural schematic diagram of a photovoltaic module provided by an embodiment of the utility model is shown.
[0027] The reference numerals are as follows:
[0028] 10-cover structure; 11-glass cover; 12-upper packaging component; 20-upper packaging film; 30-battery array; 31-bus bar; 40-lower packaging film; 50-back panel structure; 51-back panel body; 52-lower packaging component; 53-reflector. DETAILED DESCRIPTION
[0029] In the existing photovoltaic modules, the thickness of the busbar is greater than the thickness of the cell, which leads to the phenomenon of glue flow in the area corresponding to the busbar in the photovoltaic module (i.e., the packaging film in the area corresponding to the busbar is squeezed toward other areas), which makes it easy for water vapor to enter from the area where the busbar is located, corroding the cell, causing the performance of the photovoltaic module to decline, and affecting the stability and service life of the photovoltaic module. In order to solve the above problems existing in the existing photovoltaic modules, the utility model provides a new photovoltaic module and a backplane structure applied to the photovoltaic module.
[0030] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.
[0031] in, Figure 1 , Figure 2 , Figure 6 and Fig.10The schematic diagram of the structure of the photovoltaic assembly provided by the embodiment of the utility model is shown; wherein, Figure 1 and Fig.10 A schematic cross-sectional structure diagram of a photovoltaic module provided by an embodiment of the utility model is shown; Figure 2 and Figure 6 An exploded view of the structure of a photovoltaic assembly provided by an embodiment of the utility model is shown; Figures 3 to 5 The utility model embodiment provides an application Figure 1 and Figure 2 A schematic diagram of a back sheet structure in a photovoltaic module shown; Figures 7 to 9 The utility model embodiment provides an application Figure 6 The schematic diagram of the back sheet structure in the photovoltaic module shown in FIG. Figure 8 The back plate structure provided by the embodiment of the utility model is shown along Figure 7 A schematic diagram of the cross-sectional structure of the straight line l1 shown; Fig. 9 The back plate structure provided by the embodiment of the utility model is shown along Figure 7 Schematic diagram of the cross-sectional structure of the straight line l2 shown.
[0032] Specifically, the utility model provides a photovoltaic module. Figure 1 , Figure 2 , Figure 6 and Fig.10 As shown, the photovoltaic module may include: a stacked cover structure 10, an upper packaging film 20, a battery array 30, a lower packaging film 40 and a back plate structure 50, wherein:
[0033] The back plate structure 50 includes: a back plate body 51 and a lower packaging component 52 disposed on the back plate body;
[0034] The lower packaging member 52 is disposed corresponding to the busbar 31 in the battery array 30;
[0035] The upper packaging film 20 is laid between the cover structure 10 and the battery array 30;
[0036] The lower packaging film 40 is laid between the battery array 30 and the back plate structure 50;
[0037] The upper packaging film 20 and the lower packaging film 40 are used to package the battery array 30 between the cover plate structure 10 and the back plate structure 50;
[0038] The lower packaging component 52 is embedded in the lower packaging film 40 during the lamination process of the photovoltaic module and is integrated with the lower packaging film 40 .
[0039] The back plate body 51 and the lower packaging member 52 provided on the back plate body are used as a whole in the photovoltaic module. That is, in the lamination process of the photovoltaic module, the back plate body 51 and the lower packaging member 52 are laid on the lower packaging film 40 as a whole.
[0040] The relative position relationship between the lower packaging film 40, the battery array 30 and the upper packaging film 20 is consistent with the relative position relationship between the packaging film and the battery array in the existing photovoltaic module. In addition, the relative position relationship and connection relationship between the battery string and the busbar in the battery array are also basically consistent with the existing photovoltaic module, which will not be repeated here.
[0041] Among them, for the backplane structure used in the embodiment of the utility model, the thickness of the lower packaging component 52 included in the backplane structure can be 0.3 to 0.6 mm. For example, the thickness of the lower packaging component 52 can be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.48 mm, 0.5 mm, 0.55 mm, 0.58 mm, 0.6 mm, etc. Preferably, the thickness of the lower packaging component 52 is 0.4 to 0.5 mm. By controlling the thickness of the lower packaging component 52 within the range of 0.3 to 0.6 mm, it can be ensured that the lower packaging component 52 can fill the glue film corresponding to the loss of the busbar area, so as to enhance the sealing effect of the busbar area and the edge of the photovoltaic module.
[0042] Furthermore, the width of the lower package 52 included in the backplane structure can be 15 to 50 mm. For example, the width of the lower package 52 can be 15 mm, 18 mm, 20 mm, 21 mm, 23 mm, 25 mm, 26 mm, 28 mm, 29 mm, 30 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, 47 mm, 50 mm, etc. Preferably, the width of the lower package 52 is 20 to 30 mm. The width of the lower package 52 is generally not less than the width of the busbar 31 to better fill the glue film corresponding to the loss of the busbar area. In addition, the width of the lower package 52 should not be too wide to effectively control material costs.
[0043] The back plate body 51 may be a glass plate.
[0044] In addition, the material of the lower packaging component 52 may be the same as or similar to the lower packaging film and the upper packaging film. For example, the material of the lower packaging component 52 may be EVA, POE, EPE, etc.
[0045] It is worth mentioning that Figure 1 The relative positional relationship between the lower packaging component 52 and the busbar 31 is given only as an example. The lower packaging component 52 and the busbar 31 may not be in direct contact, that is, a lower packaging film may be filled between the lower packaging component 52 and the busbar 31 .
[0046] With respect to the photovoltaic module provided by the utility model, the backplane structure used in the photovoltaic module has a lower packaging component arranged on the backplane body, and the lower packaging component is arranged corresponding to the busbar. In the lamination process of the photovoltaic module, the lower packaging component is embedded in the lower packaging film and integrated with the lower packaging film and / or the upper packaging film. On the one hand, the lower packaging component can fill the packaging film lost in the busbar area due to the busbar thickness being greater than the battery cell thickness, so that the packaging film thickness corresponding to the busbar area is filled; on the other hand, the lower packaging component is integrated with the lower packaging film and / or the upper packaging film to further improve the sealing of the busbar area and the edge of the photovoltaic module, avoid water vapor from entering the module through the busbar, thereby avoiding corrosion of the battery cell, so as to effectively improve the reliability, durability and service life of the photovoltaic module.
[0047] In addition, since the lower packaging component and the backplane body are an integrated structure, after the backplane structure is laid on the lower packaging film, the lower packaging component can be accurately positioned and aligned with the busbar. Moreover, during the lamination process, since the lower packaging component and the backplane body are an integrated structure, the lower packaging component can be avoided from shifting, so that the lower packaging component can better fill the missing or lost packaging film corresponding to the busbar area.
[0048] Furthermore, if Figure 6 As shown, the back plate structure 50 in the photovoltaic module provided by the present invention may further include: a reflector 53, wherein:
[0049] The reflective member 53 is disposed corresponding to the gaps between adjacent battery strings in the battery array 30 and / or the gaps between adjacent battery cells in a battery string.
[0050] The reflector 53 is used in the photovoltaic module as a whole with the back plate body 51 and the lower packaging member 52. That is, in the photovoltaic module lamination process, the back plate body 51, the lower packaging member 52 and the reflector 53 are laid on the lower packaging film 40 as a whole.
[0051] The thickness of the reflector 53 may be 0.15-0.3 mm. For example, the thickness of the reflector 53 may be 0.15 mm, 0.17 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.24 mm, 0.25 mm, 0.28 mm, 0.3 mm, etc. By adjusting the thickness of the reflector 53, the material cost can be reduced.
[0052] The reflector 53 can be formed by laying a single layer of white adhesive pad strips, which can meet the reflection requirements and will not affect the glass back plate.
[0053] Furthermore, regardless of Figure 1 The backplane structure shown is still for Figure 2 In the backplane structure shown, the lower package 52 can be formed by laying out a double layer of white adhesive pads to facilitate laying out the lower package 52 .
[0054] In summary, it can be seen that the back plate structure 50 in the photovoltaic module provided by the present invention can have two structures.
[0055] Specifically, for the first structure of the back plate structure 50, such as Figures 1 to 5 As shown, the backplane structure 50 is composed of a backplane body 51 and a lower packaging component 52 , wherein the lower packaging component 52 is arranged corresponding to the busbar 31 in the battery array 30 .
[0056] The lower package 52 can be arranged corresponding to the busbar 31 as follows: Figure 4 As shown, a lower packaging component 52 is respectively arranged at the edge regions on both sides of the backplane body 51, and the lower packaging component 52 arranged at the edge region corresponds to the multiple bus bars arranged at the edge region of the battery array; a lower packaging component 52 is also arranged at the middle region of the backplane body 51, and the lower packaging component 52 arranged at the middle region corresponds to the multiple bus bars arranged at the middle region of the battery array.
[0057] The lower package 52 may be arranged corresponding to the busbar 31 as follows: Figure 5 As shown, a plurality of lower packaging members 52 are respectively arranged at the edge regions on both sides of the backplane body 51, and each of the plurality of lower packaging members 52 arranged at the edge regions corresponds to a bus bar arranged at the edge region of the battery array; a plurality of lower packaging members 52 are also arranged at the middle region of the backplane body 51, and each of the plurality of lower packaging members 52 arranged at the middle region corresponds to a bus bar arranged at the middle region of the battery array.
[0058] Specifically, for the second structure of the back plate structure 50, such as Figures 7 to 9 As shown, the backplane structure 50 is composed of a backplane body 51, a lower packaging component 52 and a reflective component 53, wherein the lower packaging component 52 is arranged corresponding to the busbar 31 in the battery array 30, and the reflective component 53 corresponds to the gaps between the battery strings and the gaps between the battery cells in the battery array 30.
[0059] Among them, Figure 7 and Figure 8 As shown, the reflective member 53 corresponding to the gaps between the battery cells in the battery array 30 is parallel to the lower packaging member 52. Figure 7 and Fig. 9 As shown, the gaps corresponding to the battery strings in the battery array 30 are perpendicular to the lower enclosure 52 .
[0060] Furthermore, if Fig.10 As shown, in the photovoltaic module provided by the present invention, the cover plate structure 10 may include: a glass cover plate 11 and an upper packaging member 12 disposed on the glass cover plate 11;
[0061] The upper packaging member 12 is arranged corresponding to the busbar 31 in the battery array 30;
[0062] The upper packaging component 12 is located between the glass cover plate 11 and the upper packaging film 20;
[0063] During the lamination process of the photovoltaic module, the upper packaging component 12 is embedded in the upper packaging film 20 and integrated with the upper packaging film 20 .
[0064] The upper packaging component 12 can fill the leakage of the upper packaging film 20 corresponding to the busbar area, thereby further achieving the purpose of sealing the photovoltaic module.
[0065] Furthermore, the embodiment of the utility model also provides a back plate structure 50 applied to the photovoltaic module provided in the above embodiment. Figures 3 to 5 and Figures 7 to 9 As shown, the backplane structure 50 may include: a backplane body 51 and a lower packaging member 52 disposed on the backplane body; wherein,
[0066] The lower packaging member 52 is arranged corresponding to the busbar 31 in the battery array in the photovoltaic assembly.
[0067] Since the backplane body 51 and the lower packaging component 52 arranged on the backplane body are as a whole, in the photovoltaic module lamination process, the lower packaging component is embedded in the lower packaging film and integrated with the lower packaging film and / or the upper packaging film. On the one hand, the lower packaging component can fill the packaging film lost in the busbar area due to the thickness of the busbar being greater than the thickness of the battery cell, so that the thickness of the packaging film corresponding to the busbar area is filled, avoiding too little packaging film or even missing packaging film in the busbar area; on the other hand, the lower packaging component is integrated with the lower packaging film and / or the upper packaging film, further improving the sealing of the busbar area and the edge of the photovoltaic module, avoiding water vapor from entering the module through the busbar, thereby avoiding corrosion of the battery cell, so as to effectively improve the reliability, durability and service life of the photovoltaic module.
[0068] Furthermore, if Figures 7 to 9 As shown, the back plate structure 50 provided by the present invention may further include: a reflector 53, wherein:
[0069] The reflective member 53 is disposed corresponding to the gaps between adjacent battery strings in the battery array and / or the gaps between adjacent battery cells in the battery string.
[0070] Among them, whether it is for Figures 3 to 5The back plate structure 50 shown is still for Figures 7 to 9 In the back plate structure 50 shown, the thickness of the lower package 52 may be 0.3-0.6 mm. For example, the thickness of the lower package 52 may be 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.48 mm, 0.5 mm, 0.55 mm, 0.58 mm, 0.6 mm, etc. Preferably, the thickness of the lower package 52 is 0.4-0.5 mm.
[0071] Further, the width of the lower package 52 included in the backplane structure may be 15 to 50 mm. For example, the width of the lower package 52 may be 15 mm, 18 mm, 20 mm, 21 mm, 23 mm, 25 mm, 26 mm, 28 mm, 29 mm, 30 mm, 35 mm, 38 mm, 40 mm, 42 mm, 45 mm, 47 mm, 50 mm, etc. Preferably, the width of the lower package 52 is 20 to 30 mm.
[0072] The back plate body 51 may be a glass plate.
[0073] Among them, for Figures 7 to 9 In the back plate structure 50 shown, the thickness of the reflector 53 may be 0.15-0.3 mm. For example, the thickness of the reflector 53 may be 0.15 mm, 0.17 mm, 0.19 mm, 0.2 mm, 0.21 mm, 0.22 mm, 0.24 mm, 0.25 mm, 0.28 mm, 0.3 mm, etc.
[0074] Furthermore, the reflector 53 may be formed by laying a single layer of white adhesive pad strips.
[0075] In addition, regardless of Figures 3 to 5 The backplane structure shown is still for Figures 7 to 9 In the backplane structure shown, the lower packaging member 52 can be formed by laying out a double layer of stacked white adhesive pad strips.
[0076] Since in the lamination process of the photovoltaic module, the backboard body 51, the lower packaging component 52 and the reflector 53 in the backboard structure are laid on the lower packaging film as a whole, the existing lamination process and equipment of the photovoltaic module can be used to realize the production of the photovoltaic module provided by the utility model without changing the lamination process, thereby effectively controlling the production cost of the photovoltaic module.
[0077] The introduction provided in the above steps is only used to help understand the method, structure and core idea of the utility model. For ordinary technicians in this technical field, the utility model can also be improved and modified without departing from the principle of the utility model, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A photovoltaic module, characterized in that: include: A cover plate structure (10), an upper packaging film (20), a battery array (30), a lower packaging film (40) and a back plate structure (50) are stacked, wherein: The backplane structure (50) comprises: a backplane body (51) and a lower packaging component (52) arranged on the backplane body; The lower packaging member (52) is arranged corresponding to the busbar (31) in the battery array (30); The upper packaging film (20) is laid between the cover plate structure (10) and the battery array (30); The lower packaging film (40) is laid between the battery array (30) and the backplane structure (50); The upper packaging film (20) and the lower packaging film (40) are used to package the battery array (30) between the cover plate structure (10) and the back plate structure (50); The lower packaging component (52) is embedded in the lower packaging film (40) during the lamination process of the photovoltaic module and is integrated with the lower packaging film (40).
2. The photovoltaic module according to claim 1, characterized in that: The back plate structure (50) further comprises: a reflector (53), wherein: The reflective member (53) is arranged corresponding to the gaps between adjacent battery strings in the battery array (30) and / or the gaps between adjacent battery sheets in the battery string.
3. The photovoltaic module according to claim 1, characterized in that: The thickness of the lower packaging component (52) is 0.3-0.6 mm.
4. The photovoltaic module according to claim 2, characterized in that: The thickness of the reflector (53) is 0.15-0.3 mm.
5. The photovoltaic module according to claim 2, characterized in that: The reflector (53) is formed by laying out a single layer of white adhesive pad strips.
6. The photovoltaic module according to claim 1 or 5, characterized in that: The lower packaging member (52) is formed by laying out a double layer of stacked white adhesive pad strips.
7. The photovoltaic module according to claim 1 or 2, characterized in that: The cover plate structure (10) comprises: a glass cover plate (11) and an upper packaging component (12) arranged on the glass cover plate (11); The upper packaging member (12) is arranged corresponding to the busbar (31) in the battery array (30); The upper packaging component (12) is located between the glass cover plate (11) and the upper packaging film (20); The upper packaging component (12) is embedded in the upper packaging film (20) during the lamination process of the photovoltaic module and is integrated with the upper packaging film (20).
8. The photovoltaic module according to claim 1, characterized in that: The width of the lower packaging component (52) is 15 to 50 mm.
9. The photovoltaic module according to claim 1 or 2, characterized in that: The back plate body (51) is a glass plate.
10. The photovoltaic module according to claim 7, characterized in that: The back plate body (51) is a glass plate.
11. A back plate structure (50), characterized in that: The photovoltaic module according to any one of claims 1 to 10 comprises: a back plate body (51) and a lower packaging member (52) arranged on the back plate body; wherein: The lower packaging component (52) is arranged corresponding to the busbar (31) in the battery array in the photovoltaic module.
12. The back plate structure (50) according to claim 11, characterized in that: Also includes: A reflector (53), wherein: The reflector (53) is arranged corresponding to the gaps between adjacent battery strings in the battery array and / or the gaps between adjacent battery sheets in the battery string.
13. The back plate structure (50) according to claim 12, characterized in that: The thickness of the lower packaging component (52) is 0.3-0.6 mm.
14. The back plate structure (50) according to claim 12, characterized in that: The width of the lower packaging component (52) is 15 to 50 mm.
15. The back plate structure (50) according to claim 12 or 13, characterized in that: The thickness of the reflector (53) is 0.15-0.3 mm.
16. The back plate structure (50) according to claim 12 or 13, characterized in that: The reflector (53) is formed by laying out a single layer of white adhesive pad strips.
17. The back plate structure (50) according to claim 12 or 13, characterized in that: The lower packaging member (52) is formed by laying out a double layer of stacked white adhesive pad strips.