Fixing adhesive tape for solar cell and solar cell module
By setting exhaust grooves on the solar cell tape, the bubble problem caused by the inability to fit the battery cells and the tape is solved, which improves product yield and reduces production costs.
Patent Information
- Application Number
- CN202421689990.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-16
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-07-16
AI Technical Summary
During the manufacturing process of solar cell modules, due to the presence of metal grid lines on the back of the cell, the tape cannot fully fit the cell, resulting in the bubbles being unable to be completely discharged during the lamination process, which increases the defective yield and production costs.
A fixed tape is designed, which provides exhaust grooves on the side of the tape body facing the battery cell, and uses the exhaust grooves to discharge air during the pressing process to ensure that there are no bubbles remaining between the battery cell and the tape.
Effectively reduce or avoid the generation of bubbles, improve product yield and reduce production costs.
Smart Images
Figure CN223094114U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of solar photovoltaic module manufacturing, in particular to a fixing tape for solar cells and a solar cell module. Background Art
[0002] A solar cell includes a plurality of cell wafers. In the related art, the cell wafers are connected in series by wires to form a cell string, and then a plurality of cell strings are arranged according to a design. However, during the arrangement, the cell strings are prone to dislocation. Therefore, a tape is often adhered between adjacent cell strings to control the distance between the cell strings.
[0003] Due to the presence of metal grid lines on the back of the cell, when the tape is adhered, the height of the grid lines does not completely fit with the flat tape, and the air under the tape cannot be completely evacuated during the lamination process, resulting in bubbles, increasing defective products of the module and thus affecting the production cost. Summary of the Utility Model
[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the utility model is to provide a fixing tape for solar cells. The fixing tape can preferably evacuate the air under the tape during the lamination process, reduce the occurrence of bubbles, or even avoid the occurrence of bubbles, improve the yield of products, and thus reduce the production cost.
[0005] According to an embodiment of the utility model, the fixing tape for solar cells is connected between two adjacent and spaced-apart cell wafers. The fixing tape includes: a tape body, and an exhaust groove is provided on a side of the tape body facing the cell wafer, and the exhaust groove extends along a first direction.
[0006] According to an embodiment of the utility model, by providing an exhaust groove on the side of the tape body facing the cell wafer, when the tape body is adhered to the cell wafer through a pressure-sensitive adhesive layer, during the pressing process of the cell wafer and the tape body, the air between the grid lines on the cell wafer and the tape body can be discharged along the exhaust groove during the pressing process, realizing the rapid discharge of air. Thereby, it is not easy to leave air between the cell wafer and the tape body, especially between the grid lines on the cell wafer and the tape body, reducing the occurrence of bubbles, or even avoiding the occurrence of bubbles, improving the yield of products, and thus reducing the production cost.
[0007] In addition, the fixing tape for solar cells according to the utility model may further have the following additional technical features:
[0008] In some embodiments of the utility model, a plurality of exhaust grooves are provided, and the plurality of exhaust grooves are arranged in parallel along a second direction, and the first direction and the second direction are perpendicular to each other.
[0009] In some embodiments of the present utility model, the groove depths of the plurality of exhaust grooves are equal.
[0010] In some embodiments of the present utility model, the plurality of exhaust grooves are arranged in sequence along a second direction, so that the side surface of the tape body facing the battery cell is configured as a corrugated surface extending along the second direction.
[0011] In some embodiments of the present utility model, in the direction from the battery cell to the tape body, the cross-section of the exhaust groove gradually decreases.
[0012] In some embodiments of the present utility model, both side surfaces of the exhaust groove are inclined surfaces, and in a projection plane perpendicular to the first direction, the projection of the exhaust groove is triangular.
[0013] In some embodiments of the present utility model, the tape body is a light-transmitting member.
[0014] In some embodiments of the present utility model, the tape body is a light-transmitting member integrally formed of PET.
[0015] In some embodiments of the present utility model, the side surface of the tape body facing away from the battery cell is a plane.
[0016] In some embodiments of the present utility model, in the first direction, both ends of the exhaust groove extend to the edges at both ends of the tape body.
[0017] In some embodiments of the present utility model, the exhaust groove is a straight line or a curve extending along the first direction, and the present application does not make any limitations.
[0018] The present utility model also provides a solar cell module with the fixing tape as described in the above embodiments.
[0019] The solar cell module according to the embodiments of the present utility model includes battery cells and a fixing tape. A plurality of battery cells can be connected in series into a battery string along one direction by wires, and a plurality of battery strings are arranged at intervals along another direction. The fixing tape is connected between the battery cells of two adjacent battery strings.
[0020] For the solar cell module according to the embodiments of the present utility model, by providing the fixing tape as described in the above embodiments, the air under the fixing tape can be preferably extruded during the lamination process, reducing the occurrence of bubbles, or even preventing the appearance of bubbles, improving the yield of the product, and thereby reducing the production cost.
[0021] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Brief Description of the Drawings
[0022] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:
[0023] Figure 1 FIG. is a schematic structural view of the cooperation between the fixing tape and the battery cell according to an embodiment of the present utility model.
[0024] Figure 2 FIG. is a schematic structural view of the tape body of the fixing tape from a first angle according to an embodiment of the present utility model.
[0025] Figure 3 FIG. is a schematic structural view of the tape body of the fixing tape from a second angle according to an embodiment of the present utility model.
[0026] Figure 4 FIG. is a schematic structural view of the tape body of the fixing tape from a third angle according to an embodiment of the present utility model.
[0027] Reference Signs:
[0028] 10: Fixing tape; 1: Tape body; 11: Exhaust groove; 111: Side surface; 20: Battery cell. Detailed Description of the Embodiments
[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.
[0030] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.
[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0032] A solar cell includes a plurality of cell pieces. In the related art, the cell pieces are connected in series by wires to form a cell string, and then a plurality of cell strings are arranged according to a design layout. However, during the layout, the cell strings are prone to misalignment. Therefore, tapes are often adhered between adjacent cell strings to control the distance between the cell strings.
[0033] Due to the presence of metal grid lines on the back of the cell, when the tape is adhered, the height of the grid lines does not fully fit when the tape is laid flat. During the lamination process, the air under the tape cannot be completely exhausted, resulting in bubbles, increasing the defective products of the module and thus affecting the production cost.
[0034] Based on this, the present utility model proposes a fixing tape 10 for a solar cell, which can preferably exhaust the air under the fixing tape 10 during the lamination process, reduce the occurrence of bubbles, or even prevent bubbles from occurring, improve the yield of the product, and thus reduce the production cost.
[0035] Exemplarily, the solar cell can be a TOPCon cell, a PERC cell, an HJT cell, an IBC cell, etc., and the present application does not make any restrictions.
[0036] Next, refer to Figures 1-4 to describe the fixing tape 10 for a solar cell according to an embodiment of the present utility model.
[0037] As Figures 1-4 shown, for the fixing tape 10 for a solar cell according to an embodiment of the present utility model, the solar cell includes a plurality of cell pieces 20, and the fixing tape 10 is connected between two adjacent cell pieces 20 arranged at intervals. The fixing tape 10 includes: a tape body 1, and an exhaust groove 11 is provided on a side surface 111 of the tape body 1 facing the cell piece 20, and the exhaust groove 11 extends along a first direction.
[0038] Combined with Figure 2 shown, the first direction can be the front-back direction, and the second direction can be the left-right direction. The limitation of the direction here is only for convenience of description and not a limitation of the present application. Moreover, in the following descriptions, the first direction refers to the front-back direction and the second direction refers to the left-right direction for description, and the following descriptions will not repeat.
[0039] In addition, for the fixing tape 10, the fixing tape 10 may further include a pressure-sensitive adhesive layer and a high-temperature coating. The pressure-sensitive adhesive layer is located on the side 111 of the tape body 1 facing the solar cell 20, and the high-temperature coating is located on the side 111 of the tape body 1 facing away from the solar cell 20.
[0040] After the tape body 1 is adhered to the solar cell 20 through the pressure-sensitive adhesive layer, during the pressing process of the solar cell 20 and the tape body 1, the air between the grid lines on the solar cell 20 and the tape body 1 can be discharged along the exhaust groove 11 during the pressing process, realizing the rapid discharge of air. As a result, it is not easy to leave air residues between the solar cell 20 and the tape body 1, especially between the grid lines on the solar cell 20 and the tape body 1, which can reduce the occurrence of bubbles, or even prevent bubbles from occurring, improve the yield rate of the product, and thus reduce the production cost.
[0041] According to the fixing tape 10 for a solar cell of the embodiment of the present invention, by providing an exhaust groove 11 on the side 111 of the tape body 1 facing the solar cell 20, after the tape body 1 is adhered to the solar cell 20 through the pressure-sensitive adhesive layer, during the pressing process of the solar cell 20 and the tape body 1, the air between the grid lines on the solar cell 20 and the tape body 1 can be discharged along the exhaust groove 11 during the pressing process, realizing the rapid discharge of air. As a result, it is not easy to leave air residues between the solar cell 20 and the tape body 1, especially between the grid lines on the solar cell 20 and the tape body 1, which can reduce the occurrence of bubbles, or even prevent bubbles from occurring, improve the yield rate of the product, and thus reduce the production cost.
[0042] In the first example, a plurality of solar cells 20 can be connected in series into a battery string along a first direction through wires, and a plurality of battery strings are arranged at intervals along a second direction. The fixing tape 10 is connected between the solar cells 20 of two adjacent battery strings. At this time, an exhaust groove 11 extending along the first direction is provided on the side 111 of the tape body 1 facing the solar cell 20. That is, in this example, the extending direction of the exhaust groove 11 is perpendicular to the arrangement direction between the plurality of battery strings.
[0043] In the second example, a plurality of solar cells 20 can be connected in series into a battery string along a second direction through wires, and a plurality of battery strings are arranged at intervals along a first direction. The fixing tape 10 is connected between the solar cells 20 of two adjacent battery strings. At this time, an exhaust groove 11 extending along the first direction is provided on the side 111 of the tape body 1 facing the solar cell 20. That is, in this example, the extending direction of the exhaust groove 11 is parallel to the arrangement direction between the plurality of battery strings.
[0044] The above first example and second example are only for showing the relationship between the extending directions of the two exhaust grooves 11 of the fixing tape 10 and the arranging direction among multiple battery strings. Of course, it can be understood that the extending direction of the exhaust groove 11 and the arranging direction among multiple battery strings may neither be parallel nor perpendicular. For example, the included angle between the straight line where the extending direction of the exhaust groove 11 is located and the straight line where the arranging direction among multiple battery strings is located is an acute angle. Therefore, the present application does not limit the relationship between the extending direction of the exhaust groove 11 and the arranging direction among multiple battery strings.
[0045] In some embodiments of the present utility model, as Figures 1-4 shown, a plurality of exhaust grooves 11 are provided, and the plurality of exhaust grooves 11 are arranged in parallel along a second direction, and the first direction and the second direction are perpendicular to each other. Thus, by providing the plurality of exhaust grooves 11, the exhaust efficiency and exhaust effect of the air between the grid lines on the battery chip 20 and the tape body 1 can be improved, so that the occurrence of bubbles can be further reduced or even no bubbles appear, the yield of the product can be improved, and the production cost can be reduced.
[0046] Optionally, as Figures 1-4 shown, the groove depths of the plurality of exhaust grooves 11 are equal. In this way, during the pressing process of the battery chip 20 and the tape body 1, the air between the battery chip 20 and the tape body 1 can be more evenly pressed out. It can be understood that during the pressing process of the battery chip 20 and the tape body 1, if the exhaust is uneven, it is easy for the air to flow between adjacent exhaust grooves 11 under the action of pressure. However, in the present application, the groove depths of the plurality of exhaust grooves 11 are equal, so that during the pressing process of the battery chip 20 and the tape body 1, the air between the battery chip 20 and the tape body 1 can be more evenly pressed out, which can preferably avoid the air flowing between adjacent exhaust grooves 11 under the action of pressure, and is beneficial to reducing the possibility of air remaining between the battery chip 20 and the tape body 1.
[0047] In some embodiments of the present utility model, as Figures 1-4 shown, the plurality of exhaust grooves 11 are sequentially arranged along the second direction, so that the side surface 111 of the tape body 1 facing the battery chip 20 is configured as a corrugated surface extending along the second direction. Thus, the number of the exhaust grooves 11 can be preferably increased, and the exhaust efficiency and exhaust effect of the air can be improved.
[0048] In some embodiments of the present utility model, as Figures 1-4As shown, in the direction from the battery cell 20 to the tape body 1, the cross-section of the exhaust groove 11 gradually decreases. That is, in the direction from the bottom to the opening of the exhaust groove 11, the cross-section of the exhaust groove 11 gradually increases. Thus, during pressing, the two side walls of the exhaust groove 11 can be deformed in a well-defined direction. That is, the two side walls of the exhaust groove 11 can open towards both sides and can fit with the battery cell 20. In this way, it is possible to better avoid the two side walls of the exhaust groove 11 being deformed in an uncertain direction during pressing, resulting in local air retention. Therefore, in the present utility model, by gradually reducing the cross-section of the exhaust groove 11 in the direction from the battery cell 20 to the tape body 1, air retention can be better avoided.
[0049] In some embodiments of the present utility model, as Figures 1-4 shown, both side surfaces 111 of the exhaust groove 11 are inclined surfaces, and in the projection plane perpendicular to the first direction, the projection of the exhaust groove 11 is triangular. Thus, during pressing, the two side walls of the exhaust groove 11 can open towards both sides and can fit well with the battery cell 20, and it is possible to better avoid air remaining between the side walls of the exhaust groove 11 and the battery cell 20.
[0050] In some embodiments of the present utility model, the tape body 1 is a light-transmitting member. Thus, during the pressing process, it is possible to better check through the tape body 1 whether there is residual air, and if there is residual air, where the residual air is located, which can improve the detection efficiency of the product.
[0051] Optionally, the tape body 1 is a light-transmitting member integrally formed of PET. PET is polyethylene terephthalate. By integrally forming the tape body 1 with PET, the structure of the tape body 1 can be made relatively strong, the appearance can be relatively flat, and it can also have good light-transmitting properties.
[0052] In some embodiments of the present utility model, as Figures 1-4 shown, the side surface 111 of the tape body 1 facing away from the battery cell 20 is a plane. Thus, during the pressing process, the pressure can be received more evenly, which is beneficial to squeezing out the air between the tape body 1 and the battery cell 20. Moreover, after the tape body 1 is adhered to the battery cell 20, the aesthetics is better.
[0053] In some embodiments of the present utility model, as Figures 1-4As shown, in the first direction, both ends of the exhaust groove 11 extend to the edges of both ends of the tape body 1 respectively. Thus, after the tape body 1 is produced and prepared, the tape body 1 can be cut according to actual needs, so as to cut out different required lengths, which can better meet different needs. Moreover, after the tape body 1 is cut, the gas can be well discharged through the exhaust groove 11, with strong practicability and good flexibility.
[0054] In some embodiments of the present invention, the exhaust groove 11 is a straight line or a curve extending in the first direction, and the present application does not make any restrictions.
[0055] The present invention also provides a solar cell module with the fixing tape 10 of the above embodiments.
[0056] The solar cell module according to the embodiment of the present invention includes a battery cell 20 and a fixing tape 10. A plurality of battery cells 20 can be connected in series along one direction by wires to form a battery string, and a plurality of battery strings are arranged at intervals along another direction. The fixing tape 10 is connected between the battery cells 20 of two adjacent battery strings.
[0057] For the solar cell module according to the embodiment of the present invention, by providing the fixing tape 10 of the above embodiments, the air under the fixing tape 10 can be better extruded during the lamination process, reducing the occurrence of bubbles, or even not having bubbles, which can improve the yield of the product and thus reduce the production cost.
[0058] Other constitutions and operations of the fixing tape 10 for solar cells according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail here.
[0059] In the description of this specification, the descriptions referring to terms such as "some embodiments", "optionally", "further", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0060] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the claims and their equivalents.
Claims
1. A fixing tape for a solar cell, characterized in that, The fixing tape is connected between two adjacent battery cells that are spaced apart from each other, and the fixing tape comprises: The tape body is provided with an exhaust groove on a side of the tape body facing the battery sheet, and the exhaust groove extends along a first direction.
2. The fixing tape for a solar cell according to claim 1, wherein A plurality of the exhaust grooves are provided, and the plurality of the exhaust grooves are arranged in parallel along a second direction, and the first direction and the second direction are perpendicular to each other.
3. The fixing tape for a solar cell according to claim 2, wherein The groove depths of the plurality of exhaust grooves are equal.
4. The fixing tape for a solar cell according to claim 2, wherein The plurality of exhaust grooves are sequentially arranged along the second direction, so that the side surface of the tape body facing the battery cell is configured as a corrugated surface extending along the second direction.
5. The fixing tape for a solar cell according to claim 1, characterized in that, In the direction from the battery sheet to the tape body, the cross-section of the exhaust groove gradually decreases.
6. The fixing tape for a solar cell according to claim 1, characterized in that, Both side surfaces of the exhaust groove are inclined surfaces, and in a projection plane perpendicular to the first direction, the projection of the exhaust groove is a triangle.
7. The fixing tape for a solar cell according to claim 1, wherein The tape body is a light-transmitting member.
8. The fixing tape for a solar cell according to claim 7, characterized in that, The tape body is a light-transmitting piece integrally formed of PET.
9. The fixing tape for a solar cell according to claim 1, characterized in that, The side of the tape body facing away from the battery sheet is a plane.
10. The fixing tape for a solar cell according to claim 1, characterized in that, In the first direction, two ends of the exhaust groove extend to edges of two ends of the tape body respectively, wherein the exhaust groove is a straight line or a curve extending along the first direction.
11. A solar cell module, characterized in that, include: A plurality of battery cells arranged at intervals; The fixing tape for solar cells according to any one of claims 1 to 10, wherein the fixing tape is connected between two adjacent solar cells that are spaced apart from each other.