A solar cell module having a condensing microlens array
By designing wavy or sawtooth structures at the edges of the encapsulating adhesive layer, the interfacial stress is dispersed, solving the problem of interfacial stress concentration between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer, thus improving the stability and lifespan of the module.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TRULY OPTO ELECTRONICS
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-14
AI Technical Summary
In existing solar cell modules, the difference in thermal expansion coefficients between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer leads to stress concentration at the edges, which can easily cause delamination or peeling problems.
The encapsulating adhesive layer is designed with wavy or sawtooth edges to increase the interface peak-valley distance between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer, and to eliminate stress singularities and disperse interface stress by continuously changing edges.
It effectively disperses interfacial stress, prevents edge delamination or peeling, and improves the stability and lifespan of components.
Smart Images
Figure CN224503858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to solar cell technology, and more particularly to a solar cell module with a concentrating microlens array. Background Technology
[0002] In order to improve the light-gathering performance, existing technologies will set a light-gathering microlens array layer on the surface of the solar cell layer to focus the light, thereby increasing the light density on the solar cell layer and thus improving the power generation efficiency of the solar cell layer.
[0003] For example, Chinese patent application number CN202220136760.5 discloses a convex lens array energy-concentrating structure for solar thermal utilization, which includes multiple convex lenses connected in series or in parallel, forming a matrix structure, and the focal points of the multiple convex lenses connected in series or in parallel are located on the same plane.
[0004] However, the concentrating microlens array layer is generally attached to the solar cell layer by an encapsulating adhesive layer. The difference in the coefficient of thermal expansion between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer is large. Furthermore, the solar cell layer is exposed to high temperature and sunlight for a long time. This can easily generate interfacial stress between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer. The interfacial stress is concentrated at the edges, which can lead to delamination or peeling at the edges. Utility Model Content
[0005] To address the shortcomings of the prior art, this invention provides a solar cell module with a concentrating microlens array, which can disperse the distribution of interfacial stress at the edges, thereby effectively improving the occurrence of delamination or peeling at the edges.
[0006] The technical problem to be solved by this utility model is achieved through the following technical solution:
[0007] A solar cell module with a concentrating microlens array includes a solar cell layer, an encapsulating adhesive layer, and a concentrating microlens array layer, wherein the concentrating microlens array layer is attached to the light-absorbing surface of the solar cell layer through the encapsulating adhesive layer; at least one edge of the encapsulating adhesive layer has a wavy edge or a serrated edge.
[0008] Furthermore, the encapsulating adhesive layer is EVA adhesive, cross-linked POE adhesive, or PVB adhesive.
[0009] Furthermore, the thickness of the encapsulating adhesive layer is 0.1-0.5 mm.
[0010] Furthermore, the peak-valley distance of the wavy or serrated edge is between 0.5 and 1.5 mm, and the peak-valley width is between 2.0 and 3.0 mm.
[0011] Furthermore, the minimum edge distance between the wavy or serrated edge and the solar cell layer and the concentrating microlens array layer is 1.0-2.0 mm.
[0012] Furthermore, the solar cell layer includes a light-absorbing region and a non-light-absorbing region, with the non-light-absorbing region surrounding the periphery of the light-absorbing region; the light-concentrating microlens array layer includes an array region corresponding to the light-absorbing region and a non-array region corresponding to the non-light-absorbing region, with the non-array region surrounding the periphery of the array region; the wavy or serrated edge of the encapsulating adhesive layer is located within the non-light-absorbing region and the non-array region.
[0013] Furthermore, the solar cell module also includes edge sealing silicone, which is disposed between the solar cell layer and the concentrating microlens array layer, and located outside the wavy or serrated edge of the encapsulating adhesive layer.
[0014] Furthermore, the solar cell layer includes an encapsulation backplate, a back electrode layer, a semiconductor active layer, a front electrode layer, and an encapsulation cover plate stacked sequentially; the concentrating microlens array layer is attached to the side of the encapsulation cover plate away from the encapsulation backplate by the encapsulation adhesive layer.
[0015] Furthermore, the encapsulation backplate and encapsulation cover are glass substrates or polymer films.
[0016] Furthermore, the focusing microlens array layer is a glass substrate or polymer film on which a focusing microlens array is fabricated.
[0017] The present invention has the following beneficial effects: The solar cell module of the present invention increases the effective interface peak-valley distance between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer by adopting the wavy edge or sawtooth edge on the edge of the encapsulating adhesive layer. This disperses the interface stress caused by the difference in thermal expansion coefficient between the encapsulating adhesive layer and the solar cell layer and the concentrating microlens array layer. At the same time, the continuously varying wavy edge or sawtooth edge eliminates stress singularities to prevent the interface stress from being excessively concentrated at the four edge corners, thereby effectively improving the edge delamination or peeling problem. Attached Figure Description
[0018] Figure 1 A schematic diagram of the stacked structure of the solar cell module provided by this utility model.
[0019] Figure 2This is a schematic diagram of the planar structure of the encapsulating adhesive layer and the edge sealing silicone in the solar cell module provided by this utility model.
[0020] Figure 3 A schematic diagram of the planar structure of the encapsulating adhesive layer and the edge sealing silicone in another solar cell module provided by this utility model.
[0021] Figure 4 A schematic diagram of the stacked structure of another solar cell module provided by this utility model. Detailed Implementation
[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments, examples of which are shown in the drawings. Throughout the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0023] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0024] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," "fixing," and "setting," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0026] Example 1
[0027] like Figure 1-3 As shown, a solar cell module with a concentrating microlens array includes a solar cell layer 1, an encapsulating adhesive layer 2, and a concentrating microlens array layer 3. The concentrating microlens array layer 3 is attached to the light-absorbing surface of the solar cell layer 1 through the encapsulating adhesive layer 2. At least one edge of the encapsulating adhesive layer 2 has a wavy edge 21 or a serrated edge 22.
[0028] The solar cell module of this invention increases the effective peak-valley distance between the encapsulating adhesive layer 2 and the solar cell layer 1 and the concentrating microlens array layer 3 by using the wavy edge 21 or serrated edge 22 on the edge of the encapsulating adhesive layer 2. This disperses the interfacial stress caused by the difference in thermal expansion coefficients between the encapsulating adhesive layer 2 and the solar cell layer 1 and the concentrating microlens array layer 3. At the same time, the continuously varying wavy edge 21 or serrated edge 22 eliminates stress singularities to prevent excessive concentration of interfacial stress at the four edge corners, thereby effectively improving edge delamination or peeling problems.
[0029] The focusing microlens array layer 3 is a glass substrate or polymer film on which a focusing microlens array is fabricated, the radius of curvature of the lenses is between 1 and 2 mm, and the spacing between adjacent lenses is between 2.0 and 3.0 mm.
[0030] In this embodiment, the encapsulating adhesive layer 2 may be, but is not limited to, EVA adhesive, cross-linked POE adhesive, or PVB adhesive, and its thickness is 0.1-0.5 mm.
[0031] Preferably, the peak-valley distance L of the wavy edge 21 or the sawtooth edge 22 is between 0.5-1.5 mm, the peak-valley width D is between 2.0-3.0 mm, and the minimum edge distance between the wavy edge 21 or the sawtooth edge 22 and the solar cell layer 1 and the concentrating microlens array layer 3 is 1.0-2.0 mm.
[0032] The solar cell layer 1 includes a light-absorbing region 11 and a non-light-absorbing region 12, with the non-light-absorbing region 12 surrounding the periphery of the light-absorbing region 11; the light-concentrating microlens array layer 3 includes an array region 31 corresponding to the light-absorbing region 11 and a non-array region 32 corresponding to the non-light-absorbing region 12, with the non-array region 32 surrounding the periphery of the array region 31; the wavy edge 21 or serrated edge 22 of the encapsulating adhesive layer 2 is located within the non-light-absorbing region 12 and the non-array region 32.
[0033] The non-light-absorbing region 12 is mainly used to set the current traces, positive and negative terminals, etc. of the solar cell layer 1. It also has some alignment marks for visual alignment when it is attached to the light-concentrating microlens array layer 3. Correspondingly, some alignment marks are also made on the non-array region 32 of the light-concentrating microlens array layer 3.
[0034] The solar cell module also includes edge sealing silicone 4, which is disposed between the solar cell layer 1 and the concentrating microlens array layer 3, and located outside the wavy edge 21 or serrated edge 22 of the encapsulating adhesive layer 2.
[0035] The sealing silicone 4 has two main functions. One function is to fill the wavy edge 21 or serrated edge 22 of the encapsulating adhesive layer 2 to eliminate the gap between the solar cell layer 1 and the concentrating microlens array layer 3. The outer edge of the sealing silicone 4 is flush with the edges of the solar cell layer 1 and the concentrating microlens array layer 3. The other function is to seal the encapsulating adhesive layer 2 to prevent external moisture from entering and slow down the oxidation and aging rate of the encapsulating adhesive layer 2.
[0036] like Figure 4 As shown, the solar cell layer 1 includes an encapsulation backplate 13, a back electrode layer 14, a semiconductor active layer 15, a front electrode layer 16, and an encapsulation cover plate 17 stacked in sequence; the concentrating microlens array layer 3 is attached to the side of the encapsulation cover plate 17 away from the encapsulation backplate 13 by the encapsulation adhesive layer 2.
[0037] The encapsulation backplate 13 and encapsulation cover plate 17 may be, but are not limited to, glass substrates or polymer films; the semiconductor active layer 15 may be, but is not limited to, monocrystalline silicon, polycrystalline silicon, amorphous silicon, copper indium selenide (CIGS), cadmium sulfide (CdS), cadmium telluride (CdTe), or perovskite, etc.
[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present utility model, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the present utility model.
Claims
1. A solar cell module with a concentrating microlens array, comprising a solar cell layer, an encapsulating adhesive layer, and a concentrating microlens array layer, wherein the concentrating microlens array layer is bonded to the light-absorbing surface of the solar cell layer via the encapsulating adhesive layer; characterized in that, At least one edge of the encapsulating adhesive layer is either wavy or serrated.
2. The solar cell module according to claim 1, characterized in that, The encapsulating adhesive layer is EVA adhesive, cross-linked POE adhesive, or PVB adhesive.
3. The solar cell module according to claim 1 or 2, characterized in that, The thickness of the encapsulating adhesive layer is 0.1-0.5 mm.
4. The solar cell module according to claim 1, characterized in that, The peak-valley distance of the wavy or serrated edge is between 0.5 and 1.5 mm, and the peak-valley width is between 2.0 and 3.0 mm.
5. The solar cell module according to claim 1 or 4, characterized in that, The minimum edge distance between the wavy or serrated edge and the solar cell layer and the concentrating microlens array layer is 1.0-2.0 mm.
6. The solar cell module according to claim 1, characterized in that, The solar cell layer includes a light-absorbing region and a non-light-absorbing region, with the non-light-absorbing region surrounding the periphery of the light-absorbing region; the light-concentrating microlens array layer includes an array region corresponding to the light-absorbing region and a non-array region corresponding to the non-light-absorbing region, with the non-array region surrounding the periphery of the array region; the wavy or serrated edge of the encapsulating adhesive layer is located within the non-light-absorbing region and the non-array region.
7. The solar cell module according to claim 1, characterized in that, The solar cell module also includes edge sealing silicone, which is disposed between the solar cell layer and the concentrating microlens array layer, and located outside the wavy or serrated edge of the encapsulating adhesive layer.
8. The solar cell module according to claim 1, characterized in that, The solar cell layer includes an encapsulation backplate, a back electrode layer, a semiconductor active layer, a front electrode layer, and an encapsulation cover plate stacked in sequence; the concentrating microlens array layer is attached to the side of the encapsulation cover plate away from the encapsulation backplate by the encapsulation adhesive layer.
9. The solar cell module according to claim 8, characterized in that, The encapsulation backplate and encapsulation cover are glass substrates or polymer films.
10. The solar cell module according to claim 1, characterized in that, The focusing microlens array layer is a glass substrate or polymer film on which a focusing microlens array is fabricated.