Non-main-grid battery photovoltaic module capable of preventing sheet combination

Abstract

The utility model discloses an anti-merging main-grid-free battery photovoltaic module, which comprises a battery layer, glass plates are laminated on two surfaces of the battery layer through adhesive film layers, the battery layer comprises battery pieces, the battery pieces are distributed in a rectangular array and are sequentially connected in series, and the battery pieces are main-grid-free battery pieces; the side walls of the battery pieces are provided with insulating glue layers, the insulating glue layers are used for preventing adjacent battery pieces from being combined, and the adjacent battery pieces are arranged closely. According to the main-grid-free cell photovoltaic module capable of preventing cell merging, the insulating glue layers are arranged on the side walls of the cell pieces, so that positioning holes do not need to be formed in the glue film layers and positioning grooves do not need to be formed in the glass plates on the basis of preventing the cell merging phenomenon during lamination, the structure is simplified, the cost is reduced, adjacent distribution and spacing reduction between the cell pieces are facilitated, and the production efficiency is improved. Therefore, the photoelectric conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to an anti-parallelization photovoltaic component without main grid cells. Background Art

[0002] Compared with other solar cells, busbarless solar cells eliminate the main grid line and retain the secondary grid line, which greatly reduces the use of silver paste, reduces production costs, and increases the effective illumination area of the solar cell, eliminating the light blocking by the main grid line, which is beneficial to increase power generation.

[0003] In order to further improve the power generation efficiency, when laying the main-grid-less solar cells, a method as described in a small-string-spacing photovoltaic module announced in announcement number CN218769566U is usually adopted. By opening a first positioning groove on the back panel, a positioning piece that passes through the second film layer is inserted into the first positioning groove, and the positioning piece is used to separate two adjacent solar cells. This can prevent the movement of the solar cells during lamination and cause the cells to be paralleled, and at the same time reduce the spacing between adjacent solar cells, which is beneficial to reducing the overall size and weight of the module and improving the photoelectric conversion efficiency of the module.

[0004] However, the above device has a complex structure and high cost. It is necessary to open a first positioning groove on the back panel and set a first positioning hole and a second positioning hole on the first film layer and the second film layer respectively. Before lamination, positioning pieces are laid at the corresponding positions of the first positioning groove, the first positioning hole and the second positioning hole, which makes the laying of the battery cells cumbersome and reduces the production efficiency. Although paralleling can be avoided, the spacing between adjacent battery cells is at least greater than the thickness of the positioning piece, resulting in a relatively large gap between the battery cells. Therefore, the overall structural size of the photovoltaic module is still large, which indirectly reduces the photovoltaic power generation efficiency.

[0005] Therefore, it is necessary to improve the photovoltaic modules based on busbar-free cells in the prior art. Utility Model Content

[0006] The purpose of the present invention is to overcome the defects in the prior art and provide a photovoltaic module with a main grid-free cell that simplifies the structure, reduces costs, and further reduces the distance between cells on the basis of preventing cell paralleling accidents to improve the photoelectric conversion efficiency.

[0007] To achieve the above technical effects, the technical solution of the present invention is: a busbar-free photovoltaic module with anti-parallelization, comprising a cell layer, both sides of which are laminated with glass plates through a film layer, and the cell layer comprises:

[0008] The battery cells are distributed in a rectangular array and connected in series in sequence. The battery cells are main grid-free battery cells. An insulating adhesive layer is provided on the side walls of the battery cells. The insulating adhesive layer is used to prevent adjacent battery cells from being paralleled. Adjacent battery cells are arranged closely together.

[0009] Preferably, in order to further improve the photovoltaic power generation efficiency, the insulating adhesive layer is a light-transmitting insulating adhesive layer.

[0010] Preferably, in order to achieve the insulation and light transmittance of the insulating adhesive layer, the insulating adhesive layer is any one of a butyl adhesive layer, a UV curing adhesive layer, and an organic silicone layer.

[0011] Preferably, in order to facilitate heat dissipation while ensuring insulation effect and photoelectric conversion efficiency, the thickness of the insulating adhesive layer is 50um-200um.

[0012] Preferably, in order to further enhance the protection of the battery cells and prevent the battery cells from being stacked together, the insulating rubber layer is an insulating rubber sleeve, and the circumferential outer edge of the battery cell is sealed to the circumferential inner wall of the insulating rubber sleeve.

[0013] Preferably, in order to reduce the usage of the insulating adhesive layer, the insulating adhesive layer includes a plurality of insulating strips spaced apart along the circumference of the battery cell.

[0014] Preferably, in order to prevent water vapor from penetrating, a sealing frame is further included, the battery layer and the adhesive film layers stacked on both sides of the battery layer are fixed on the inner side of the sealing frame, and the sealing frame is sandwiched between the glass plates on both sides of the battery layer.

[0015] Preferably, in order to ensure the distribution density of the cells and improve the photovoltaic power generation efficiency, the distance between two adjacent cells is less than 0.5 mm.

[0016] Preferably, in order to improve power generation efficiency, auxiliary grid lines are arranged side by side on both sides of the solar cell, and both ends of the auxiliary grid lines extend to the circumferential outer edge of the solar cell.

[0017] In summary, compared with the prior art, the utility model provides an anti-paralleling main-grid cell photovoltaic module, which prevents paralleling during lamination by providing an insulating adhesive layer on the side walls of the cell. This eliminates the need to provide positioning holes on the adhesive film layer and positioning grooves on the glass plate, thereby simplifying the structure, reducing costs, and facilitating close distribution of cell panels, reducing spacing, and thus improving photoelectric conversion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural diagram of the first embodiment;

[0019] Figure 2 yes Figure 1 Explosion diagram of

[0020] Figure 3 yes Figure 1 Explosion diagram from another perspective;

[0021] Figure 4 is a schematic structural diagram of the battery layer of the first embodiment;

[0022] Figure 5 This is a schematic diagram of the connection structure between the battery cell and the insulating adhesive layer of the first embodiment;

[0023] Figure 6 is a structural diagram of the second embodiment;

[0024] Figure 7 yes Figure 6 Explosion diagram of

[0025] Figure 8 is a schematic structural diagram of the battery layer of the third embodiment;

[0026] Figure 9 yes Figure 8 A magnified view of part A;

[0027] In the figure: 1. Battery layer; 11. Battery cell; 111. Secondary grid line; 12. Insulation adhesive layer; 2. Adhesive film layer; 3. Glass plate; 4. Sealing frame. DETAILED DESCRIPTION

[0028] The following embodiments are used to further describe the specific embodiments of the present invention in conjunction with the accompanying drawings and examples. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0029] First embodiment

[0030] like Figure 1-Figure 5 As shown, the anti-parallelization busbar-free photovoltaic module of the first embodiment of the present invention includes a cell layer 1, both sides of which are laminated with glass plates 3 through adhesive film layers 2, and the cell layer 1 includes:

[0031] The battery cells 11 are distributed in a rectangular array and connected in series in sequence. The battery cells 11 are main-grid-less battery cells 11. An insulating adhesive layer 12 is provided on the side wall of the battery cell 11. The insulating adhesive layer 12 is used to prevent adjacent battery cells 11 from being paralleled. Adjacent battery cells 11 are arranged closely.

[0032] In the present invention, by providing an insulating adhesive layer 12 on the sidewalls of the battery cells 11, even if the material of the adhesive film layer 2 melts due to heat during the lamination process, causing the battery cells 11 to shift, resulting in adjacent battery cells 11 approaching each other, the presence of the insulating adhesive layer 12 can prevent the two adjacent battery cells 11 from directly contacting each other, thereby achieving insulation between the adjacent battery cells 11 and preventing the occurrence of parallel battery cell accidents. It should be noted that the insulating adhesive layer 12 can be provided on the sidewalls of the battery cells 11 in various ways, including but not limited to painting, spraying, etc.

[0033] Since the provision of the insulating adhesive layer 12 can avoid the occurrence of parallel cell accidents, there is no need to set positioning holes on the film layer 2, and there is no need to set positioning grooves on the glass plate 3, and there is no need to set positioning plates in the entire battery assembly, thereby simplifying the structure of the entire photovoltaic assembly and reducing production costs; in addition, when the battery layer 1 is laid, adjacent battery cells 11 are arranged closely together, shortening the spacing between adjacent battery cells 11, so that on the basis of laying the same number of battery cells 11, the overall length and width of the battery layer 1 can be effectively reduced, that is, on the basis of laying the same number of battery cells 11, a larger number of battery cells 11 can be laid, which is beneficial to improving the efficiency of photovoltaic power generation.

[0034] In this embodiment, the adhesive film layers 2 on both the front and back sides of the battery layer 1 are EVA adhesive film layers 2 .

[0035] A further improvement is that the insulating adhesive layer 12 is a light-transmitting insulating adhesive layer 12. With the above design, the light-transmitting insulating adhesive layer 12 can increase the amount of light irradiated on both sides of the cell 11, thereby increasing the power generation of the component.

[0036] A further improvement is that the insulating adhesive layer 12 is any one of a butyl adhesive layer, a UV curing adhesive layer, and an organic silicone rubber layer.

[0037] Compared with other insulating adhesives, butyl adhesive, UV curing adhesive and organic silicone adhesive all have good insulating properties. When cured into the insulating adhesive layer 12, they can ensure sufficient insulation resistance to prevent electrical short circuits between the battery cells 11. In addition, they also have good thermal stability. During lamination, the adhesive can withstand a certain temperature and pressure without softening or melting, thereby ensuring the stability and reliability of the laminate. In addition, the cured insulating adhesive layer 12 also has excellent light transmittance, which facilitates the passage of light to increase the sunlight received by both sides of the battery cell 11.

[0038] A further improvement is that the thickness of the insulating adhesive layer 12 is 50 μm to 200 μm. Specifically, the thickness of the insulating adhesive layer 12 is 100 μm. This structure limits the thickness of the insulating adhesive layer 12, ensuring stable insulation performance while also reducing the area occupied by the insulating adhesive layer 12 when laying the battery layer 1. This helps ensure a tight arrangement of the battery cells 11, thereby increasing the power generation of the photovoltaic module.

[0039] A further improvement is that the insulating rubber layer 12 is an insulating rubber sleeve, and the circumferential outer edge of the battery cell 11 is sealed to the circumferential inner wall of the insulating rubber sleeve. With the above structural design, the insulating rubber layer 12 is designed in the shape of an insulating rubber sleeve, wrapping the outer periphery of the battery cell 11, thereby achieving a good insulation effect on the circumferential outer edge of the battery cell 11 and preventing the battery cells 11 from being close to each other and causing short circuits.

[0040] A further improvement is that the spacing between two adjacent cells 11 is less than 0.5 mm. Specifically, the spacing between two adjacent cells 11 is 0.3 mm to 0.4 mm. By limiting the spacing between adjacent cells 11 as described above, the cells 11 in the battery layer 1 of the photovoltaic module are arranged more tightly. Moreover, the presence of the insulating adhesive layer 12 on the circumferential outer edge of the cells 11 prevents the cells from being stacked during lamination.

[0041] A further improvement is that secondary grid lines 111 are arranged side by side on both sides of the cell 11, and both ends of the secondary grid lines 111 extend to the circumferential outer edge of the cell 11. With the above design, secondary grid lines 111 are arranged on both sides of the cell 11, which can achieve double-sided power generation and increase power generation.

[0042] It should be noted that, in this embodiment, along the series direction, in two adjacent battery cells 11, the auxiliary grid line 111 of the previous battery cell 11 is electrically connected to the auxiliary grid line 111 of the next battery cell 11 through a welding strip (not shown in the figure). More specifically, in order to facilitate laying, the two sides of the battery cell 11 are the front and the back, wherein the auxiliary grid line 111 on the front side of the previous battery cell 11 is electrically connected to the auxiliary grid line 111 on the back side of the next battery cell 11 through a welding strip. According to the above method, the battery cells 11 are distributed in a rectangular array and are connected in series in sequence through multiple welding strips.

[0043] Second embodiment

[0044] like Figure 6 and Figure 7 As shown, the anti-parallelization main-grid-free cell photovoltaic module of the second embodiment of the present invention is based on the first embodiment, but differs in that it further includes a sealing frame 4, the cell layer 1 and the adhesive film layer 2 stacked on both sides of the cell layer 1 are fixed on the inner side of the sealing frame 4, and the sealing frame 4 is clamped between the glass plates 3 on both sides of the cell layer 1.

[0045] The sealing frame 4 is made of butyl rubber. By setting the sealing frame 4, the two sides of the sealing frame 4 are connected to the glass plates 3 on both sides of the battery layer 1, so that the glass plates 3 and the sealing frame 4 enclose a sealed cavity isolated from the outside world, isolating and protecting the battery layer 1 and the film layer 2, preventing water from entering the battery layer 1, thereby ensuring that the photovoltaic module can stably perform photovoltaic power generation.

[0046] Third embodiment

[0047] like Figure 8 and Figure 9 As shown, the anti-parallelization busbar-free photovoltaic module of the third embodiment of the present invention is based on the second embodiment, with the difference that the insulating adhesive layer 12 includes a plurality of insulating strips spaced apart along the circumference of the cell 11 .

[0048] The insulating adhesive layer 12 mainly includes a plurality of insulating strips distributed along the circumference of the battery cell 11. Compared with designing the insulating adhesive layer 12 as a closed-loop frame structure of the insulating adhesive sleeve in the first embodiment, the adhesive required for molding the insulating adhesive layer 12 can be effectively reduced, thereby reducing production costs. In addition, due to the presence of the insulating strips on the side walls of the battery cell 11, the insulating strips can prevent adjacent battery cells 11 from direct contact and causing short circuits during lamination, thereby avoiding the occurrence of parallel cells.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A busbar-free photovoltaic module with an anti-parallelization function, comprising a cell layer (1), wherein both sides of the cell layer (1) are laminated with glass plates (3) via adhesive film layers (2), characterized in that: The battery layer (1) comprises: A battery cell (11) is provided, wherein the battery cells (11) are distributed in a rectangular array and are sequentially connected in series, and the battery cell (11) is a main grid-free battery cell (11); an insulating adhesive layer (12) is provided on the side wall of the battery cell (11), and the insulating adhesive layer (12) is used to prevent adjacent battery cells (11) from being paralleled, and adjacent battery cells (11) are provided in close proximity.

2. The anti-parallelization busbar-free photovoltaic module according to claim 1, characterized in that: The insulating adhesive layer (12) is a light-transmitting insulating adhesive layer (12).

3. The anti-parallelization busbar-free photovoltaic module according to claim 2, characterized in that: The insulating adhesive layer (12) is any one of a butyl adhesive layer, a UV curing adhesive layer, and an organic silicone rubber layer.

4. The anti-parallelization busbar-free photovoltaic module according to claim 1, characterized in that: The thickness of the insulating adhesive layer (12) is 50um-200um.

5. The anti-parallelization busbar-free photovoltaic module according to claim 1, characterized in that: The insulating rubber layer (12) is an insulating rubber sleeve, and the circumferential outer edge of the battery cell (11) is sealed to the circumferential inner wall of the insulating rubber sleeve.

6. The anti-parallelization busbar-free photovoltaic module according to claim 1, characterized in that: The insulating adhesive layer (12) comprises a plurality of insulating strips distributed at intervals along the circumference of the battery sheet (11).

7. The anti-parallelization busbar-free photovoltaic module according to any one of claims 1 to 6, characterized in that: It also includes a sealing frame (4), the battery layer (1) and the adhesive film layer (2) stacked on both sides of the battery layer (1) are fixed on the inner side of the sealing frame (4), and the sealing frame (4) is sandwiched between the glass plates (3) on both sides of the battery layer (1).

8. The anti-parallelization busbar-free photovoltaic module according to any one of claims 1 to 6, characterized in that: The distance between two adjacent battery cells (11) is less than 0.5 mm.

9. The anti-parallelization busbar-free photovoltaic module according to any one of claims 1 to 6, characterized in that: Both sides of the battery cell (11) are provided with secondary grid lines (111) distributed side by side, and both ends of the secondary grid lines (111) extend to the circumferential outer edge of the battery cell (11).

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