Tandem solar cell module

Abstract

A solar cell stack module includes a frame with a flange disposed along the inner perimeter of the frame; a lower solar cell module disposed in the frame and supported by the flange; an upper solar cell module disposed in the frame and stacked on the lower solar cell module; and a top cover plate stacked on the upper solar cell module.

Description

Technical Field

[0001] This invention relates to the field of solar energy technology, and in particular to a novel solar cell stacking module that can simultaneously fix and install at least two solar cell modules on the same frame structure. Prior Technology

[0002] In recent years, solar energy technology has continuously improved in conversion efficiency and power. Scientists have devoted a great deal of effort to breakthroughs in various materials, and while they have achieved remarkable results, this also means that in the near future, each material will face theoretical limitations and stagnation. In view of this, combining the advantages of different materials will have the opportunity to further break through the theoretical limitations of single materials, and thus tandem cells are beginning to receive attention.

[0003] In recent years, the most attention-grabbing tandem solar cells have been combinations of perovskite and silicon-based solar cells. Perovskite cells primarily achieve high conversion efficiency at short wavelengths, while silicon-based cells excel at long wavelengths. The combined effect can further improve the efficiency of tunneling oxide passivated contact (TOPCon) solar cells from 24-26% to over 30%. However, the most mature tandem solar cells currently available are still 2T tandem cells, which combine a perovskite cell onto a silicon-based cell using semiconductor processes, integrating the two into a single cell.

[0004] However, perovskite solar cells are still in the development stage and their lifespan is far shorter than that of silicon-based solar cells. Therefore, if the perovskite cell fails after the two are combined, it cannot be replaced. Thus, another 4T solar cell solution has emerged. The difference from 2T is that the perovskite and silicon-based solar cells are completed independently, and then the two cells are connected in series to form a solar cell pack. In this case, if any cell fails, it can be replaced immediately.

[0005] Current solar module installation methods only consider the installation of a single module, and the design of the frame or bracket / block only takes into account the installation of a single module. Therefore, this technical field still needs a frame design that can simultaneously install and secure two or more modules in the same space. Summary of the Invention

[0006] The main objective of this invention is to provide a novel 4T battery module and frame assembly that can simultaneously fix and install two modules on the same frame structure.

[0007] The present invention provides a solar cell stacking module, comprising: a frame, wherein a flange baffle is provided on the inner edge of the frame; a lower solar cell module placed in the frame, and the periphery of the lower solar cell module directly contacts the flange baffle and is supported; an upper solar cell module placed in the frame and stacked on the lower solar cell module; and an upper cover plate stacked on the upper solar cell module.

[0008] According to an embodiment of the present invention, the frame is a one-piece molded frame.

[0009] According to an embodiment of the present invention, the frame is a composite frame, comprising a pair of long-side strip structures and a pair of short-side strip structures.

[0010] According to an embodiment of the present invention, the frame is made of high-strength and corrosion-resistant metal or insulating material.

[0011] According to an embodiment of the present invention, the upper solar cell module is a battery module with light transmittance.

[0012] According to an embodiment of the present invention, the light-transmitting battery module comprises a perovskite battery module.

[0013] According to an embodiment of the present invention, the lower solar cell module is a silicon-based cell module.

[0014] According to an embodiment of the present invention, the silicon-based battery module includes a TOPCon battery module, an HJT battery module, or an xBC battery module.

[0015] According to an embodiment of the present invention, the solar cell stacking module further includes: a buffer strip disposed between the upper solar cell module and the upper cover sheet.

[0016] According to an embodiment of the present invention, the cushioning strip is pre-fixed or embedded in the lower surface of the upper cover sheet.

[0017] According to an embodiment of the present invention, a buffer strip is provided between the upper solar cell module and the upper cover sheet, between the upper solar cell module and the lower solar cell module, or between the lower solar cell module and the flange baffle. Simple Explanation of the Diagram

[0018] Figure 1 is a side view schematic diagram of a solar cell stacking module according to an embodiment of the present invention. Figure 2 is a side view of the frame according to another embodiment of the present invention. Figure 3 is a top view schematic diagram of a solar cell stacking module according to another embodiment of the present invention. Figure 4 is a schematic cross-sectional view drawn along the tangent line I-I' in Figure 3. Figure 5 is a schematic cross-section drawn along tangent line II-II' in Figure 3. Figure 6 is a top view schematic diagram of a solar cell stacking module according to another embodiment of the present invention. Figure 7 is a schematic cross-sectional view drawn along the tangent line I-I' in Figure 6. Figure 8 is a schematic cross-section drawn along tangent line II-II' in Figure 6. Implementation

[0019] In the following description, details will be illustrated with reference to the accompanying drawings, which also form part of the detailed description of the specification, and are depicted in a manner that describes specific examples in which the embodiments can be implemented. The embodiments described below are described in sufficient detail to enable those skilled in the art to implement them.

[0020] Of course, other embodiments may also be adopted, or any structural, logical, and electrical changes may be made without departing from the embodiments described herein. Therefore, the detailed description below should not be regarded as limiting; rather, the embodiments included therein will be defined by the appended claims.

[0021] This invention provides a novel 4T battery / module frame structure that can simultaneously fix and install two (or more) battery modules on the same frame structure, such as the recently popular perovskite battery module plus the TOPCon battery module stacked module.

[0022] The newly designed solar module frame structure can accommodate two or more layers of battery modules simultaneously and secure them within the same frame space. For example, a perovskite battery module on the upper layer can be paired with a TOPCon battery module on the lower layer, combining their respective advantages in wavelength conversion to improve power generation efficiency. Furthermore, the new solar module frame structure also facilitates future maintenance and replacement.

[0023] Please refer to Figure 1, which is a side view schematic diagram of a solar cell stacking module according to an embodiment of the present invention. As shown in Figure 1, the solar cell stacking module 1 includes a frame 10, wherein a flange baffle 110 is provided on the inner bottom edge of the frame 10. According to an embodiment of the present invention, the frame 10 has a central opening OP for accommodating the solar cell module. According to an embodiment of the present invention, the frame 10 includes a pair of long-side strip structures 10a and a pair of short-side strip structures 10b.

[0024] According to an embodiment of the present invention, the solar cell stacking module 1 further includes a lower solar cell module 20, which is placed in the central opening OP of the frame 10, and the bottom periphery of the lower solar cell module 20 directly contacts the flange baffle 110 of the frame 10 and is supported. According to an embodiment of the present invention, for example, the lower solar cell module 20 can be a silicon-based solar cell module such as a tunnel oxide passivated contact (TOPCon) cell module, a heterojunction (HJT) cell module, or an interdigitated back contact (xBC) cell module.

[0025] According to an embodiment of the present invention, the solar cell stacking module 1 further includes an upper solar cell module 30, which is placed in the central opening OP of the frame 10 and stacked on the lower solar cell module 20. According to an embodiment of the present invention, for example, the upper solar cell module 30 can be a perovskite solar cell module or other battery module with light transmittance and a wide bandgap (or ultra-wide bandgap).

[0026] According to an embodiment of the present invention, the size of the central opening OP is approximately equal to the size of the lower solar cell module 20 and the upper solar cell module 30, so that the upper solar cell module 30 and the lower solar cell module 20 can be suitably placed within the frame 10. According to an embodiment of the present invention, the upper solar cell module 30 and the lower solar cell module 20 can be the same size, or the upper solar cell module 30 and the lower solar cell module 20 can be different sizes, for example, a one-to-two or one-to-three configuration.

[0027] According to an embodiment of the present invention, the upper solar cell module 30 and the lower solar cell module 20 can be frameless battery modules or framed battery modules.

[0028] According to an embodiment of the present invention, the solar cell stacking module 1 further includes an annular upper cover plate 50 for pressing against the periphery of the upper solar cell module 30. According to an embodiment of the present invention, the annular upper cover plate 50 can be locked to the frame 10 by means of screws FM or other fixing methods. According to an embodiment of the present invention, the upper cover plate 50 is made of, for example, a high-strength and corrosion-resistant metal or insulating material, and it also has an opening 50a, similar in size to the central opening OP of the frame 10.

[0029] According to an embodiment of the present invention, to prevent damage to the upper solar cell module 30 caused by stress, a buffer strip 40 can be provided between the upper solar cell module 30 and the upper cover sheet 50. According to an embodiment of the present invention, the buffer strip 40 can be continuous or discontinuous. According to an embodiment of the present invention, the buffer strip 40 can be pre-fixed or embedded in the lower surface of the upper cover sheet 50.

[0030] According to an embodiment of the present invention, the flange baffle 110 of the frame 10 may be continuous or discontinuous, and its width is less than or equal to the surrounding inactive area of ​​the lower solar cell module 20.

[0031] According to an embodiment of the present invention, the frame 10 can be a one-piece molded frame, but is not limited thereto. According to another embodiment of the present invention, the frame 10 can be a modular structure. For example, a pair of long-side strip structures 10a and a pair of short-side strip structures 10b can be disassembled into independent components to facilitate handling and installation.

[0032] According to embodiments of the present invention, the frame 10 is made of, for example, a high-strength and corrosion-resistant metal or insulating material. According to embodiments of the present invention, the frame 10 can be made of the same material as a typical solar cell frame. According to embodiments of the present invention, the frame 10 can be made of corrosion-resistant insulating materials such as general C-shaped steel, stainless steel, or engineering plastics. The solar module frame structure design of the present invention is a fixing scheme that superimposes an upper solar cell module 30 on top of a lower solar cell module 20 (e.g., a TOPCon battery module) to meet the installation requirements of a 4T module, thereby achieving the purpose of power enhancement and also solving the problem of insufficient lifespan and inability to replace perovskite battery modules in a timely manner.

[0033] Please refer to Figure 2, which is a side view of a frame according to another embodiment of the present invention, wherein the same or similar elements, layers or materials are still represented by the same symbols. As shown in Figure 2, the frame 10 is a modular structure, for example, composed of a plurality of long-side strip structures 10a (4 shown in the figure) and a plurality of short-side strip structures 10b (6 shown in the figure), having a plurality of central openings OP for accommodating solar cell modules (omitted in the figure). A flange baffle 110 is provided on the inner edge of the bottom of the frame 10. According to an embodiment of the present invention, the frame 10 has a plurality of central openings OP (3 shown in the figure) for accommodating a plurality of solar cell modules.

[0034] In Figure 2, the two middle long-side strip structures 10a and the upper cover 50 can be shared. Furthermore, the upper cover 50 can be long and strip-shaped rather than ring-shaped, and it is fixed to the long-side strip structures 10a. Of course, in other embodiments, the two middle long-side strip structures 10a can also be separate, for example, each of the long-side strip structures 10a in the figure can be divided into two and arranged side by side.

[0035] Please refer to Figures 3 through 5, wherein Figure 3 is a top view of a solar cell stacking module according to another embodiment of the present invention, Figure 4 is a cross-sectional view drawn along tangent line I-I' in Figure 3, and Figure 5 is a cross-sectional view drawn along tangent line II-II' in Figure 3, wherein the same or similar elements, layers or materials are still represented by the same symbols.

[0036] As shown in Figures 3 to 5, the solar cell stacking module 1a includes a frame 10, wherein a flange baffle 110 is provided on the inner bottom edge of the frame 10. According to an embodiment of the present invention, the frame 10 has a central opening OP for accommodating the solar cell module. According to an embodiment of the present invention, the frame 10 is a modular structure, including a pair of long-side strip structures 10a and a pair of short-side strip structures 10b, which can be disassembled into independent components for easy handling and installation.

[0037] According to embodiments of the present invention, the frame 10 is, for example, made of a high-strength and corrosion-resistant metal or insulating material. According to embodiments of the present invention, the frame 10 can be made of the same material as a typical solar cell frame. According to embodiments of the present invention, the frame 10 can be made of corrosion-resistant insulating materials such as general C-shaped steel, stainless steel, or engineering plastics. According to embodiments of the present invention, the frame 10 can be secured to the metal bracket 60 using screws or the like.

[0038] According to an embodiment of the present invention, the solar cell stacking module 1a further includes a lower solar cell module 20, which is placed in the central opening OP of the frame 10. According to an embodiment of the present invention, the lower solar cell module 20 is a framed cell module, with its bottom frame 201 directly contacting and being supported by the flange baffle 110 of the frame 10. According to an embodiment of the present invention, the flange baffle 110 of the frame 10 may be continuous or discontinuous, and its width is less than or equal to the surrounding inactive area of ​​the lower solar cell module 20. According to an embodiment of the present invention, for example, the lower solar cell module 20 may be a silicon-based solar cell module such as a TOPCon cell module, an HJT cell module, or an xBC cell module.

[0039] According to an embodiment of the present invention, the solar cell stacking module 1a further includes an upper solar cell module 30, which is also placed in the central opening OP of the frame 10 and stacked on top of the lower solar cell module 20. According to an embodiment of the present invention, for example, the upper solar cell module 30 can be a perovskite cell module or other cell module with light transmittance and a wide bandgap (or ultra-wide bandgap). According to an embodiment of the present invention, a buffer strip 42 may be optionally provided between the lower solar cell module 20 and the upper solar cell module 30.

[0040] According to an embodiment of the present invention, the size of the central opening OP is approximately equal to the size of the lower solar cell module 20 and the upper solar cell module 30, so that the upper solar cell module 30 and the lower solar cell module 20 can be suitably placed within the frame 10. According to an embodiment of the present invention, the upper solar cell module 30 and the lower solar cell module 20 can be the same size, or the upper solar cell module 30 and the lower solar cell module 20 can be different sizes, for example, a one-to-two or one-to-three configuration.

[0041] According to an embodiment of the present invention, the solar cell stacking module 1a may further include an upper cover plate 50 as shown in Figure 1, used to press down the periphery of the upper solar cell module 30. For simplicity, the upper cover plate 50 is not shown in Figures 3 to 5.

[0042] Please refer to Figures 6 through 8, wherein Figure 6 is a top view of a solar cell stacking module according to another embodiment of the present invention, Figure 7 is a cross-sectional view drawn along tangent line I-I' in Figure 6, and Figure 8 is a cross-sectional view drawn along tangent line II-II' in Figure 6, wherein the same or similar elements, layers or materials are still represented by the same symbols.

[0043] As shown in Figures 6 to 8, the solar cell stacking module 1b includes a frame 10, wherein a flange baffle 110 is provided on the inner bottom edge of the frame 10. According to an embodiment of the present invention, the frame 10 has a central opening OP for accommodating the solar cell module. According to an embodiment of the present invention, the frame 10 is a modular structure, including a pair of long-side strip structures 10a and a pair of short-side strip structures 10b, which can be disassembled into independent components for easy handling and installation.

[0044] According to embodiments of the present invention, the frame 10 is, for example, made of a high-strength and corrosion-resistant metal or insulating material. According to embodiments of the present invention, the frame 10 can be made of the same material as a typical solar cell frame. According to embodiments of the present invention, the frame 10 can be made of corrosion-resistant insulating materials such as general C-shaped steel, stainless steel, or engineering plastics. According to embodiments of the present invention, the frame 10 can be secured to the metal bracket 60 using screws or the like.

[0045] According to an embodiment of the present invention, the solar cell stacking module 1b further includes a lower solar cell module 20, which is placed in the central opening OP of the frame 10. According to an embodiment of the present invention, the lower solar cell module 20 is a frameless module, supported by the flange baffle 110 of the frame 10. According to an embodiment of the present invention, a buffer strip 44 is provided between the flange baffle 110 and the lower solar cell module 20. According to an embodiment of the present invention, the flange baffle 110 of the frame 10 may be continuous or discontinuous, and its width is less than or equal to the surrounding inactive area of ​​the lower solar cell module 20. According to an embodiment of the present invention, for example, the lower solar cell module 20 may be a silicon-based solar cell module such as a TOPCon module, an HJT module, or an xBC module.

[0046] According to an embodiment of the present invention, the solar cell stacking module 1b further includes an upper solar cell module 30, which is also placed in the central opening OP of the frame 10 and stacked on top of the lower solar cell module 20. According to an embodiment of the present invention, for example, the upper solar cell module 30 can be a perovskite cell module or other cell module with light transmittance and a wide bandgap (or ultra-wide bandgap). According to an embodiment of the present invention, a buffer strip 42 may be optionally provided between the lower solar cell module 20 and the upper solar cell module 30.

[0047] According to an embodiment of the present invention, the size of the central opening OP is approximately equal to the size of the lower solar cell module 20 and the upper solar cell module 30, so that the upper solar cell module 30 and the lower solar cell module 20 can be suitably placed within the frame 10. According to an embodiment of the present invention, the upper solar cell module 30 and the lower solar cell module 20 can be the same size, or the upper solar cell module 30 and the lower solar cell module 20 can be different sizes, for example, a one-to-two or one-to-three configuration.

[0048] According to an embodiment of the present invention, the solar cell stacking module 1b may further include an upper cover plate 50 as shown in Figure 1, used to press down the periphery of the upper solar cell module 30. For simplicity, the upper cover plate 50 is not shown in Figures 6 to 8.

[0049] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall be covered by the present invention.

[0050] 1, 1a, 1b: Solar cell stacking module

[0051] 10: Frame

[0052] 10a: Long-side strip structure

[0053] 10b: Short-side strip structure

[0054] 110: Flange baffle

[0055] 20: Lower layer solar cell module

[0056] 201: Bottom frame

[0057] 30: Upper solar cell module

[0058] 40: Buffer strip

[0059] 42: Buffer strip

[0060] 44: Buffer strip

[0061] 50: Top cover plate

[0062] 50a: Opening

[0063] 60: Metal bracket

[0064] FM: Screw

[0065] OP: Central opening

Claims

1. A solar cell stacking module, comprising: a frame, wherein, The frame is a modular structure composed of a plurality of long-side strip structures and a plurality of short-side strip structures, having a plurality of central openings, and a flange baffle is provided on the inner edge of at least each of the plurality of long-side strip structures; a plurality of lower-layer solar cell modules are placed in the plurality of central openings of the frame, and the periphery of the lower-layer solar cell modules directly contacts the flange baffle and is supported; a plurality of upper-layer solar cell modules are placed in the plurality of central openings of the frame and stacked on the lower-layer solar cell modules; and a plurality of upper cover plates are fixed to the plurality of long-side strip structures that are used between adjacent central openings, and are also stacked on adjacent upper-layer solar cell modules.

2. The solar cell stacking module as described in claim 1, wherein, The frame is made of high-strength and corrosion-resistant metal or insulating material.

3. The solar cell stacking module as described in claim 1, wherein, The upper solar cell module is a light-transmitting battery module.

4. The solar cell stacking module as described in claim 3, wherein, The light-transmitting battery module includes a perovskite battery module.

5. The solar cell stacking module as claimed in claim 1, wherein, The lower solar cell module is a silicon-based cell module.

6. The solar cell stacking module as described in claim 5, wherein, The silicon-based battery module includes tunneling oxide passivated contact (TOPCon) battery modules, heterojunction (HJT) battery modules, or interdigitated back contact (xBC) modules.

7. The solar cell stacking module as claimed in claim 1, wherein, Also includes: a buffer strip disposed between the upper solar cell module and the upper cover sheet.

8. The solar cell stacking module as described in claim 7, wherein, The cushioning strip is pre-fixed or embedded in the lower surface of the upper cover sheet.

Images