Thin-film solar module and curtain wall
By setting up an isolation part on the drainage strip of the film solar component, the drainage strip isolates from the glue film, and the problem of poor contact or chip contact with the chip is solved, and the reliability of the component is improved.
Patent Information
- Application Number
- CN202421057267.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-24
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In existing thin-film solar modules, the drainage strips are prone to poor contact or fall off with the chip, resulting in poor component reliability.
Set up isolation parts on the drainage bar of the film solar component, and at least part of the discharge bar isolates from the glue film to reduce the adhesion between the drainage strip and the solar cell chip.
The drainage strip isolates from the glue film by isolation, which reduces the risk of drainage strips during the packaging process, and improves the reliability of thin membrane solar components.
Smart Images
Figure CN222396031U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of photovoltaics, in particular to a thin-film solar energy component and a curtain wall. Background Art
[0002] BIPV (Building Integrated Photovoltaic) technology is innovating day by day. For the field of traditional curtain walls or photovoltaic curtain walls, thin-film solar modules have made great progress. The positive and negative electrodes are important components of thin-film solar cells. The existing process technology is to apply a single layer of pressure-sensitive conductive tape to the electrodes of the chip to form a drain strip. However, after the film is applied on the drain strip, the drain strip is prone to poor contact with the chip or fall off after the encapsulation is completed, which makes the reliability of the thin-film solar module worse. Utility Model Content
[0003] The utility model aims to provide a thin-film solar module and curtain wall, so as to solve the problem that the drain strip is easy to have poor contact with the chip or fall off in the prior art to a certain extent. The utility model provides a thin-film solar module, including: a solar cell chip; a drain strip, which is arranged on one side of the solar cell chip and is electrically connected to the solar cell chip; and an isolator, which is arranged on the side of the drain strip away from the solar cell chip to isolate at least part of the drain strip from the adhesive film.
[0004] The drain bar is fixed at the electrode of the solar cell chip, and an isolating member is provided on the drain bar, and the isolating member isolates at least part of the drain bar from the adhesive film, thereby preventing the drain bar from having poor contact with the solar cell chip or falling off due to excessive bonding force with the adhesive film during the module packaging process. That is, compared with directly applying the adhesive film on the drain bar, the present embodiment isolates at least part of the drain bar from the adhesive film through the isolating member, thereby reducing the bonding force on the side of the drain bar away from the solar cell chip, thereby reducing the bonding force on the side of the drain bar away from the solar cell chip, and thus reducing the bonding force on the side of the drain bar away from the solar cell chip during the stress release process of the module packaging, thereby reducing the influence on the connection between the drain bar and the solar cell chip, thereby reducing the risk of poor contact between the drain bar and the solar cell chip, and improving the reliability of the thin-film solar module.
[0005] Furthermore, the bonding force between the isolation member and the drainage strip is smaller than the bonding force between the isolation member and the adhesive film.
[0006] Furthermore, the isolating member is an integral unit, and extends out of the drain bar in both the length direction and the width direction of the drain bar; and the portion of the isolating member extending out of the drain bar is connected to the solar cell chip.
[0007] Furthermore, the isolation member includes: an isolation base tape, which is arranged on a side of the drain strip away from the solar cell chip; an insulating tape, which covers a side of the isolation base tape away from the solar cell chip; and the bonding force between the isolation base tape and the drain strip is smaller than the bonding force between the insulating tape and the adhesive film.
[0008] Furthermore, in the length direction and the width direction of the drain bar, the isolation base tape extends out of the drain bar, and the insulating tape extends out of the isolation base tape.
[0009] Furthermore, in the width direction of the drain strip, the width of the portion of the isolation base tape extending out of the drain strip on one side is at least 5 mm, that is, the extension area in the width direction of the drain strip is covered with the isolation base tape within at least 5 mm.
[0010] Furthermore, in the width direction of the drain strip, the width of the portion of the insulating tape extending out of the isolation base strip on one side is at least 2 mm, that is, the extension area in the width direction of the isolation base strip is covered with the insulating tape within at least 2 mm.
[0011] Furthermore, the thickness of the isolation base tape does not exceed 0.1 mm.
[0012] Furthermore, the solar cell chip is a perovskite solar cell chip, the drain strip is a pressure-sensitive conductive tape or a metal tape; the isolation base tape is a tinned copper tape or a copper tape; and the insulating tape is a PET acrylic double-sided tape.
[0013] The utility model provides a curtain wall, comprising the above-mentioned thin-film solar energy component.
[0014] In the thin-film solar energy assembly provided by the utility model, the connection stability between the drain strip and the solar cell chip is good and the contact is good, so that the thin-film solar energy assembly has high reliability, and further the curtain wall has high reliability and good stability.
[0015] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute a part of the specification, illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0017] Figure 1 This is a schematic structural diagram of a thin-film solar module according to an embodiment of the present utility model;
[0018] Figure 2 This is a schematic structural diagram of a thin-film solar module according to another embodiment of the present invention;
[0019] Figure 3 for Figure 2 A cross-sectional view of the drain strip and solar cell chip in a thin-film solar module shown;
[0020] Figure 4 for Figure 2 A cross-sectional view of a thin-film solar module is shown.
[0021] icon:
[0022] 1-Solar cell chip;
[0023] 2- Drainage strips;
[0024] 3-isolating element; 31-isolating base tape; 32-insulating tape. DETAILED DESCRIPTION
[0025] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.
[0026] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.
[0027] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.
[0028] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.
[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0030] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0031] like Figures 1 to 4 As shown, the embodiment of the utility model provides a thin-film solar module, comprising: a solar cell chip 1; a drain bar 2, the drain bar 2 is arranged on the solar cell chip 1 (such as Figure 3 As shown); a spacer 3, the spacer 3 is arranged on the side of the drain strip 2 away from the solar cell chip 1 to isolate at least part of the drain strip 2 from the adhesive film, that is, the spacer 3 covers at least part of the drain strip 2, thereby isolating the covered part of the drain strip 2 from the adhesive film. The adhesive film may refer to an adhesive film used for thin-film solar modules, which is generally used to bond solar cell chips and back panels, and can have a packaging effect, such as isolating water and oxygen. The adhesive film of the utility model is not particularly limited, and technicians can choose it according to actual needs to meet actual needs.
[0032] The inventors have found that in the prior art thin-film solar modules, the adhesive film is directly applied to the drain bar 2. In the stress release process of the module packaging, there is a problem that the bonding force between the drain bar 2 and the adhesive film is greater than the bonding force between the drain bar 2 and the solar cell chip 1, which increases the possibility of poor contact or detachment between the drain bar 2 and the solar cell chip 1. For example, in the stress release process after lamination, the adhesive film may adhere to the drain bar and deform together, thereby destroying the contact between the drain bar and the solar cell chip.
[0033] In this embodiment, the drain bar 2 is fixed at the position where the electrode of the solar cell chip 1 is set, and an isolating member 3 is set on the drain bar 2. The isolating member 3 isolates at least part of the drain bar 2 from the adhesive film, thereby preventing the drain bar 2 from having poor contact with the solar cell chip 1 or falling off due to excessive bonding force with the adhesive film during the component packaging process. That is, compared with directly applying the adhesive film on the drain bar 2, the present embodiment isolates at least part of the drain bar 2 from the adhesive film through the isolating member 3, which can reduce the bonding force on the side of the drain bar 2 away from the solar cell chip 1. In this way, during the stress release process of the component packaging, the bonding force on the side of the drain bar 2 away from the solar cell chip 1 is reduced, and the influence on the connection between the drain bar 2 and the solar cell chip 1 is reduced, thereby reducing the risk of poor contact between the drain bar 2 and the solar cell chip 1, and improving the reliability of the thin-film solar module.
[0034] The connection force between the spacer 3 and the solar cell chip 1 can be greater than the bonding force between the spacer and the adhesive film, so that the spacer 3 will not fall off from the solar cell chip 1 due to the bonding force of the adhesive film, thereby protecting the drain strip.
[0035] As an optional solution, the bonding force between the spacer 3 and the drain bar 2 is smaller than the bonding force between the spacer 3 and the adhesive film, so that even if the spacer 3 is separated from the solar cell chip 1, the drain bar 2 can still maintain good contact with the solar cell chip 1.
[0036] Therefore, in this embodiment, whether the spacer 3 is separated from the solar cell chip 1 or not will not affect the good contact between the drain bar 2 and the solar cell chip 1, thereby ensuring the reliability of the thin-film solar module and providing a wide range of structural forms and material options for the spacer 3.
[0037] Based on the above embodiment, the isolation member 3 may include a plurality of isolation segments. Figure 1 As shown, multiple isolation segments can be arranged at intervals along the length direction of the drain bar 2; or, multiple isolation segments can be arranged at intervals along the width direction of the drain bar 2; or, multiple isolation segments can be arranged at intervals along the length direction of the drain bar 2 and along the width direction of the drain bar 2.
[0038] As an alternative, Figure 2 As shown, the spacer 3 is a whole, and the spacer 3 extends out of the drain bar 2 in the length direction and the width direction of the drain bar 2. It should be noted that the solar cell assembly generally also includes structures such as bus bars and junction boxes. The present disclosure does not limit these structures and their connection methods with the drain bar. The technicians can design and select according to actual needs based on the technical solution of the present disclosure.
[0039] In this embodiment, the isolating member 3 completely covers the drain bar 2 as a whole, which is convenient for installation. Moreover, the isolating member 3 completely covers the drain bar 2, which completely isolates the drain bar 2 from the adhesive film, avoiding the adhesive film from adhering to the drain bar 2. When the isolating member 3 is the same, the adhesive force on the side of the drain bar 2 away from the solar cell chip 1 is reduced to the greatest extent. In some cases, the side of the drain bar 2 away from the solar cell chip 1 is not subject to the adhesive force, thereby avoiding affecting the connection between the drain bar 2 and the solar cell chip 1. The connection between the drain bar 2 and the solar cell chip 1 is more stable and reliable, thereby ensuring good contact between the drain bar 2 and the solar cell chip 1, thereby further improving the reliability of the thin-film solar module. As an optional solution, the portion of the isolating member 3 extending out of the drain bar 2 is connected to the solar cell chip 1.
[0040] In the present embodiment, the isolation member 3 is connected to the solar cell chip 1 so as to fix the isolation member 3 on the drain strip 2. At this time, the isolation member 3 covers all the drain strips 2, but avoids fixing the isolation member 3 on the drain strip 2 by bonding, thereby greatly reducing the bonding force between the drain strip 2 and the isolation member 3. In this way, no matter whether there is bonding force between the isolation member 3 and the adhesive film, or whether the bonding force is large or small, it will not affect the connection between the drain strip 2 and the solar cell chip 1, thereby widening the selection range of the isolation member 3.
[0041] As an alternative, Figure 2 and Figure 4 As shown, the isolation member 3 includes: an isolation base tape 31, which is arranged on the side of the drain bar 2 away from the solar cell chip 1; an insulating tape 32, which covers the side of the isolation base tape 31 away from the solar cell chip 1; the bonding force between the isolation base tape 31 and the drain bar 2 is less than the bonding force between the insulating tape 32 and the adhesive film. It should be noted that the present disclosure does not limit the bonding force between the isolation base tape 31 and the insulating tape 32, and the bonding force between the two can meet the actual needs.
[0042] In this embodiment, the isolation base tape 31 covers the drain strip 2, and the bonding force between the isolation base tape 31 and the drain strip 2 is smaller than the bonding force between the insulating tape 32 and the adhesive film. The insulating tape 32 helps to fix the position of the isolation base tape 31 and can better protect the drain strip 2.
[0043] The isolation base tape 31 may be made of flexible materials such as paper.
[0044] As an optional solution, the material of the isolation base tape 31 is metal (for example, copper, tinned copper, aluminum or stainless steel, etc.). The metal isolation base tape 31 has a smaller bonding force with the drain bar 2, which further reduces the bonding force on the side of the drain bar 2 away from the solar cell chip 1. Moreover, the metal isolation base tape 31 can be connected with the drain bar 2 to conduct electricity together, thereby reducing the resistance of the circuit. In addition, the isolation base tape 31 can be fixed to the solar cell chip 1 by welding. This connection is more secure. During the stress release process of the component package, the isolation base tape 31 can maintain a stable connection with the solar cell chip 1, and can avoid affecting the contact between the drain bar 2 and the solar cell chip 1.
[0045] The isolation base tape 31 may cover a portion of the drain bar 2 , while the insulating tape 32 completely covers the drain bar 2 .
[0046] As an alternative, Figure 2 and Figure 4 As shown, in the length and width directions of the drain strip 2 , the isolation base tape 31 extends out of the drain strip 2 , and the insulating tape 32 extends out of the isolation base tape 31 . The isolation base tape 31 completely covers the drain strip 2 , and the insulating tape 32 completely covers the isolation base tape 31 .
[0047] In this embodiment, the isolation base tape 31 completely covers the drain bar 2 , thereby preventing the side of the drain bar 2 away from the solar cell chip 1 from being subjected to the adhesive force of the insulating tape 32 , thereby better ensuring good contact between the drain bar 2 and the solar cell chip 1 .
[0048] In the width direction of the drain strip 2, the width of the portion of the isolation base strip 31 extending out of the drain strip 2 on one side is at least 5 mm (for example, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm, etc.), that is, the extension area in the width direction of the drain strip 2 is covered with the isolation base strip 31 within at least 5 mm. Figure 1 As shown, in the width direction of the drain strip 2, the drain strip 2 includes a first drain strip side and a second drain strip side that are oppositely arranged, and the isolation base strip 31 includes a base strip side and a second base strip side that are oppositely arranged; the distance between the first drain strip side and the first base strip side is a, and a is at least 5 mm; the distance between the second drain strip side and the second base strip side is b, and b is at least 5 mm. Preferably, on both sides in the width direction of the drain strip 2, the width of the portion of the isolation base strip 31 extending out of the drain strip 2 is substantially the same to ensure better welding quality.
[0049] The thickness of the isolation base tape 31 does not exceed 0.1 mm (for example, 0.1 mm, 0.08 mm, 0.06 mm, or 0.04 mm, etc.).
[0050] In the width direction of the drain strip 2, the width of the portion of the insulating tape 32 extending out of the isolation base strip 31 on one side is at least 2 mm (for example, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm or 12 mm, etc.), that is, the extension area in the width direction of the isolation base strip 31 is covered with the insulating tape 32 within at least 2 mm. Specifically, as Figure 1 As shown, in the width direction of the drain strip, the insulating tape 32 includes a first tape side edge and a second tape side edge that are arranged opposite to each other; the distance between the first tape side edge and the first tape side edge is c, and c is at least 2 mm; the distance between the second tape side edge and the second tape side edge is d, and d is at least 2 mm. Preferably, on both sides in the width direction of the drain strip 2, the width of the portion of the insulating tape 32 extending out of the isolation base tape 31 is substantially the same to ensure that the isolation base tape 31 is completely covered.
[0051] The shape of the isolation base strip 31 may be wavy, zigzag, etc. Optionally, the isolation base strip 31 is in a straight strip shape, which is convenient for processing and assembly.
[0052] The insulating tape 32 may be wavy, serrated, etc. Optionally, the insulating tape 32 is in a straight strip shape, which is convenient for processing and assembly.
[0053] The base tape of the insulating tape 32 can be cotton cloth, synthetic fiber fabric, plastic film, etc.
[0054] As an optional solution, the solar cell chip 1 is a perovskite solar cell chip, the drain strip 2 is a pressure-sensitive conductive tape (total thickness 0.06 mm, bonding strength: 3-5 N / cm) or a metal tape; the isolation base tape is a tinned copper tape or a copper tape; the insulating tape is a PET acrylic double-sided tape (insulation strength ≥ 6 kV). PET acrylic double-sided tape can refer to a tape with PET as the base material and covered with an acrylic adhesive layer on both sides. PET represents polyethylene terephthalate.
[0055] The embodiment of the utility model further provides a curtain wall, comprising the thin-film solar module described in any of the above technical solutions, and thus having all the beneficial technical effects of the thin-film solar module, which will not be described in detail herein.
[0056] In the thin-film solar module provided by the embodiment of the utility model, the connection stability between the drain bar 2 and the solar cell chip 1 is good and the contact is good, so that the thin-film solar module has high reliability, and further the curtain wall has high reliability and good stability.
[0057] It should be noted that the thin-film solar module provided in the embodiment of the utility model can be used for but not limited to curtain walls, and can also be applied to other buildings, such as roofs, ceilings, etc.
[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them; although the utility model is described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model. In the description provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments instead of other features, the combination of features of different embodiments means being within the scope of the utility model and forming different embodiments.
Claims
1. A thin-film solar module, characterized in that: include: Solar cell chips; A drain bar, disposed on one side of the solar cell chip and electrically connected to the solar cell chip; The isolating member is arranged on a side of the drain bar away from the solar cell chip to isolate at least a portion of the drain bar from the adhesive film.
2. The thin-film solar module according to claim 1, characterized in that: The bonding force between the isolating member and the drain strip is smaller than the bonding force between the isolating member and the adhesive film.
3. The thin-film solar module according to claim 1 or 2, characterized in that: The isolating member is a whole, and the isolating member extends out of the drain strip in both the length direction and the width direction of the drain strip; The portion of the spacer extending out of the drain bar is connected to the solar cell chip.
4. The thin-film solar module according to claim 3, characterized in that: The isolating element comprises: An isolation base tape, wherein the isolation base tape is arranged on a side of the drain bar away from the solar cell chip; An insulating tape, wherein the insulating tape covers a side of the isolation base tape away from the solar cell chip; The bonding force between the isolation base tape and the drain strip is smaller than the bonding force between the insulating tape and the adhesive film.
5. The thin-film solar module according to claim 4, characterized in that: In the length direction and the width direction of the drain strip, the isolation base tape extends out of the drain strip, and the insulating tape extends out of the isolation base tape.
6. The thin-film solar module according to claim 5, characterized in that: In the width direction of the drain strip, the width of the portion of the isolation base tape extending out of the drain strip on one side is at least 5 mm.
7. The thin-film solar module according to claim 5, characterized in that: In the width direction of the drain strip, the width of the portion of the insulating tape extending out of the isolation base tape on one side is at least 2 mm.
8. The thin-film solar module according to claim 4, characterized in that: The thickness of the isolation base tape does not exceed 0.1 mm.
9. The thin-film solar module according to any one of claims 4 to 8, characterized in that: The solar cell chip is a perovskite solar cell chip, the drain strip is a pressure-sensitive conductive tape or a metal tape; the isolation base tape is a tinned copper tape or a copper tape; and the insulating tape is a PET acrylic double-sided tape.
10. A curtain wall, characterized in that: The invention comprises the thin-film solar module according to any one of claims 1 to 9.