High-efficiency all-black photovoltaic module
By using single-sided painted black busbars and silver busbars combined with black insulating strips in all-black photovoltaic modules, the problems of high production cost and low efficiency of all-black photovoltaic modules are solved, and efficient and low-cost production of all-black photovoltaic modules is achieved.
Patent Information
- Application Number
- CN202422189394.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-09-06
AI Technical Summary
Existing all-black photovoltaic modules have high production costs and low production efficiency, mainly because the black busbars require special processing and the use of black EPE boards for shielding increases the number of steps.
Single-sided painted black busbars are used at both ends, a silver busbar is used in the middle, and a black insulating strip is covered on the silver busbar. Combined with a double-layer co-extrusion composite structure of transparent and opaque EVA adhesive layers, the use of black materials is reduced and the production process is simplified.
A balance is achieved between the appearance of all-black photovoltaic modules and production efficiency and cost, reducing raw material costs and improving production efficiency.
Smart Images
Figure CN223391598U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of photovoltaic components, in particular to a high-efficiency all-black component. Background Art
[0002] With the development of photovoltaic modules, all-black high-efficiency modules have gained popularity in the market for their elegant appearance and higher photovoltaic conversion efficiency. Existing all-black modules generally use a black backsheet for encapsulation, with either black busbars directly applied to the front, or silver busbars shielded by EPE sheeting. Both approaches use only black busbars, but the specialized processing required for these busbars leads to higher production costs. Using black EPE sheeting for shielding increases the number of steps required on the entire production line, significantly reducing the efficiency of photovoltaic module assembly. Utility Model Content
[0003] The main technical problem solved by the utility model is to provide a high-efficiency all-black photovoltaic component, which can meet the comprehensive requirements of production efficiency and production cost in production.
[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a high-efficiency all-black photovoltaic module, which is arranged from top to bottom in sequence: face glass, front adhesive layer, laminated assembly, bottom adhesive layer and back plate; the laminated assembly includes battery cells, photovoltaic welding strips and bus bars, and the battery cells are connected in series end to end through photovoltaic welding strips. There are three groups of bus bars, which are respectively arranged at both ends and in the middle of the laminated assembly, and the current generated in the series-connected battery cells is gathered and connected to the junction box. There are two types of bus bars, among which the bus bars installed at both ends of the laminated assembly are single-sided painted black bus bars, and the bus bars installed in the middle of the laminated assembly are silver bus bars, and the side of the silver bus bar facing the face glass is covered with a black insulating strip.
[0005] In a preferred embodiment of the present invention, the high-efficiency all-black photovoltaic module is an all-black single-glass module, wherein the front adhesive layer of the all-black single-glass module is a transparent EVA adhesive layer, the bottom adhesive layer is a black EVA adhesive layer, and the backsheet is a white PET sheet. The black EVA adhesive layer is composed of two layers of EVA film, the side of the two layers of EVA film closest to the laminated module being a transparent EVA film layer, and the side of the two layers of EVA film closest to the backsheet being an opaque EVA black film layer. The transparent EVA film layer and the opaque EVA black film layer are composited together by double-layer co-extrusion.
[0006] In a preferred embodiment of the present invention, the high-efficiency all-black photovoltaic module is an all-black double-glass module, the front adhesive layer of the all-black double-glass module is a transparent EVA adhesive layer, the bottom adhesive layer is also a transparent EVA adhesive layer, and the back panel is a semi-tempered black grid glass plate, and the center of each grid of the black grid glass plate corresponds to the packaging position of a battery cell.
[0007] In a preferred embodiment of the present invention, the thickness of the black insulating strip is 0.1 to 0.5 mm, and the width of the black insulating strip is 4 to 6 mm greater than the width of the busbar.
[0008] The beneficial effects of the present invention are as follows: the present invention combines the two installation methods of busbars in existing all-black components, uses single-sided painted black busbars at both ends and ordinary silver busbars in the middle, and covers the busbars with black insulating plates to achieve an all-black effect for the entire photovoltaic component. In this way, on the one hand, the structure of the silver busbar covering the black insulating plate is still retained in the middle, which reduces the total amount of black busbars used and significantly reduces the overall raw material cost. On the other hand, since the step of using black EPE plates to cover the busbars at both ends on the production line is reduced, the production efficiency of the unit photovoltaic component is significantly improved, so that the appearance, efficiency and cost of the high-efficiency all-black photovoltaic component are balanced. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is a schematic diagram of the three-dimensional structure of a preferred embodiment of the utility model;
[0010] Figure 2 It is an enlarged schematic diagram of a local structure of the embodiment shown;
[0011] The markings of the components in the accompanying drawings are as follows:
[0012] 1. Surface glass, 2. Front adhesive layer, 3. Laminated components, 4. Bottom adhesive layer, 5. Back sheet, 6. Black busbar, 7. Silver busbar, 8. Black insulating strip. DETAILED DESCRIPTION
[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.
[0014] See also Figure 1 and Figure 2 , the embodiments of the present utility model include:
[0015] Example 1
[0016] A high-efficiency all-black single-glass component, which is arranged in order from top to bottom: a face glass 1, a front adhesive layer 2, a laminated component 3, a bottom adhesive layer 4 and a back panel 5; the face glass 1 is a 3.2mm plate of tempered transparent glass, the back panel 5 is a white PET plate with a thickness of about 0.32mm and a surface sprayed with a fluorine-containing weather-resistant coating, the front adhesive layer 2 is a transparent EVA adhesive layer, and the bottom adhesive layer 4 is a black EVA adhesive layer. The laminated component 3 includes battery cells, photovoltaic welding ribbons and bus bars, and the battery cells are connected in series end to end through photovoltaic welding ribbons. There are three groups of bus bars, which are arranged at both ends and in the middle of the laminated component respectively. The current generated in the series-connected battery cells is converged and connected to the junction box. There are two types of bus bars, among which the bus bars installed at both ends of the laminated component are single-sided painted black bus bars 6, and the one installed in the middle of the laminated component 3 is a silver bus bar 7. The side of the silver bus bar facing the face glass 1 is covered with a black insulating strip 8.
[0017] The black EVA layer is composed of two layers of EVA film. The side of the two layers of EVA film closest to the laminate assembly 3 is a transparent EVA film layer, and the side closest to the back panel 5 is an opaque EVA black film layer. The transparent EVA film layer and the opaque EVA black film layer are compounded together by double-layer co-extrusion. The purpose of using two layers of EVA film is to reduce the amount of black EVA plastic used and reduce overall costs.
[0018] The thickness of the black insulating bead 8 is 0.1-0.5 mm. The width of the black insulating bead 8 is 4-6 mm greater than the width of the silver busbar 7. In actual production, the black insulating bead 8 is generally made of EPE material injection molding, with an actual thickness of 0.5 mm. The width of the silver busbar 7 is 6 mm, and the corresponding black insulating bead width is 10 mm. The reason for adopting this thickness is that EPE material has excellent insulation and deformation absorption properties. When covered, it can fuse and fix with the EVA of the front adhesive layer through adaptive deformation during packaging. Therefore, it cannot be too thick, which would occupy space, nor too thin, which would reduce strength and cause damage during packaging. The reason for adopting this width is that, on the one hand, the black insulating bead 8 must be able to completely cover the silver busbar 7, preventing the silver busbar 7 from reflecting light and affecting the all-black effect. On the other hand, the width of the black insulating bead 8 must match the pre-designed middle width of the laminate assembly 2. After being placed in the middle, it can fuse and solidify with the EVA of the front adhesive layer during packaging, improving the positional stability of the battery cells after arrangement.
[0019] Example 2
[0020] A high-efficiency all-black double-glass component, which is arranged in the following order from top to bottom: a face glass 1, a front adhesive layer 2, a laminate assembly 3, a bottom adhesive layer 4, and a back panel 5; the face glass 1 is a 2mm plate of tempered transparent glass, and the back panel 5 is a semi-tempered black grid glass plate with a thickness of approximately 2mm. The center of each grid on the black grid glass plate corresponds to the packaging position of a battery cell, thus just filling the light leakage position around the battery cell. The front adhesive layer 2 is a transparent EVA adhesive layer, and the bottom adhesive layer 4 is also a transparent EVA adhesive layer. The laminated assembly 3 includes battery cells, photovoltaic welding strips and bus bars. The battery cells are connected in series end to end through photovoltaic welding strips. There are three groups of bus bars, which are respectively arranged at the two ends and the middle of the laminated assembly. The current generated in the series-connected battery cells is gathered and connected to the junction box. There are two types of bus bars, among which the bus bars installed at the two ends of the laminated assembly are single-sided painted black bus bars 6, and the bus bars installed in the middle of the laminated assembly 3 are silver bus bars 7. The side of the silver bus bar facing the face glass 1 is covered with a black insulating strip 8.
[0021] The thickness of the black insulating bead 8 is 0.1-0.5 mm. The width of the black insulating bead 8 is 4-6 mm greater than the width of the silver busbar 7. In actual production, the black insulating bead 8 is generally made of EPE material injection molding, with an actual thickness of 0.5 mm. The width of the silver busbar 7 is 6 mm, and the corresponding black insulating bead width is 10 mm. The reason for adopting this thickness is that EPE material has excellent insulation and deformation absorption properties. When covered, it can fuse and fix with the EVA of the front adhesive layer through adaptive deformation during packaging. Therefore, it cannot be too thick, which would occupy space, nor too thin, which would reduce strength and cause damage during packaging. The reason for adopting this width is that, on the one hand, the black insulating bead 8 must be able to completely cover the silver busbar 7, preventing the silver busbar 7 from reflecting light and affecting the all-black effect. On the other hand, the width of the black insulating bead 8 must match the pre-designed middle width of the laminate assembly 2. After being placed in the middle, it can fuse and solidify with the EVA of the front adhesive layer during packaging, improving the positional stability of the battery cells after arrangement.
[0022] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A high-efficiency all-black photovoltaic module, characterized in that: The high-efficiency all-black photovoltaic module is arranged in order from top to bottom: the face glass, the front adhesive layer, the laminated component, the bottom adhesive layer and the back sheet; The laminated assembly includes battery cells, photovoltaic welding ribbons and bus bars. The battery cells are connected in series by connecting them end to end through photovoltaic welding ribbons. There are three groups of bus bars, which are respectively arranged at both ends and in the middle of the laminated assembly. The current generated in the series-connected battery cells is gathered and then connected to the junction box. There are two types of bus bars. The bus bars installed at both ends of the laminated assembly are black bus bars with single-sided painting, and the bus bars installed in the middle of the laminated assembly are silver bus bars. The side of the silver bus bar facing the panel is covered with a black insulating strip.
2. The high-efficiency all-black photovoltaic module according to claim 1, characterized in that: The high-efficiency all-black photovoltaic module is an all-black single-glass module, the front adhesive layer of the all-black single-glass module is a transparent EVA adhesive layer, the bottom adhesive layer is a black EVA adhesive layer, and the backboard is a white PET plate.
3. The high-efficiency all-black photovoltaic module according to claim 2, characterized in that: The black EVA adhesive layer is composed of two layers of EVA adhesive film, the side of the two layers of EVA adhesive film close to the laminated component is a transparent EVA film layer, and the side close to the backboard is an opaque EVA black film layer. The transparent EVA film layer and the opaque EVA black film layer are compounded together by double-layer co-extrusion.
4. The high-efficiency all-black photovoltaic module according to claim 1, characterized in that: The high-efficiency all-black photovoltaic module is an all-black double-glass module. The front adhesive layer of the all-black double-glass module is a transparent EVA adhesive layer, the bottom adhesive layer is also a transparent EVA adhesive layer, and the back panel is a semi-tempered black grid glass plate. The center of each grid of the black grid glass plate corresponds to the packaging position of a battery cell.
5. The high-efficiency all-black photovoltaic module according to claim 1, characterized in that: The thickness of the black insulating strip is 0.1-0.5 mm.
6. The high-efficiency all-black photovoltaic module according to claim 1, characterized in that: The width of the black insulating strip is 4 to 6 mm greater than the width of the bus bar.