Glued photovoltaic cell string and photovoltaic module

Abstract

The invention relates to an adhesive photovoltaic cell string and a photovoltaic module. The photovoltaic cell string comprises a photovoltaic cell piece, a welding strip, a first adhesive point and a film strip, the welding strip is a low-temperature welding strip, the film strip covers the surface of the photovoltaic cell piece and the welding strip on the surface of the photovoltaic cell piece, and the first adhesive point is located between the film strip and the photovoltaic cell piece, avoids the welding strip and is used for providing adhesive force and fixing the film strip on the photovoltaic cell piece. The photovoltaic module comprises a photovoltaic cell string, and the photovoltaic cell string is the above glued photovoltaic cell string. The method has the beneficial effects that the film strip is fixed through the glue points, so that the film strip does not need a very high glue amount any more, enough viscosity is ensured to fix the welding strip, and the situation that the glue amount is too large, glue permeates between the welding strip and a thin grid line of a photovoltaic cell piece, and insulation barrier is formed is avoided.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic technology, in particular to an adhesive photovoltaic cell string and a photovoltaic module. Background Art

[0002] The preparation process of photovoltaic modules includes first printing fine grid lines and main grid lines on the surface of photovoltaic cells, then connecting multiple photovoltaic cells into photovoltaic cell strings through welding strips, and finally forming photovoltaic modules after layout, lamination and other processes of the photovoltaic cell strings. Photovoltaic modules collect the current of photovoltaic cells through welding strips, main grid lines and fine grid lines on the surface of photovoltaic cells, thereby realizing the power generation function of the battery module, wherein the main grid lines and fine grid lines are both prepared with silver paste.

[0003] Conventional photovoltaic cells are connected in series to form a battery string by high-temperature welding of welding tape and photovoltaic cell main grid silver paste. High-temperature welding is prone to poor quality problems such as false welding or over-welding, and the process yield is also affected. The new photovoltaic cell process technology, especially N-type HJT photovoltaic cells, cannot be baked at high temperatures, which will cause the efficiency of photovoltaic cells to decay. In order to adapt to the thinning and low temperature requirements of photovoltaic cells, zero-stress adhesive technology is used to directly glue the low-temperature welding tape to the fine grid of the photovoltaic cell. Infrared heating welding is no longer used, but the welding of the low-temperature welding tape and the fine grid of the photovoltaic cell is achieved through ordinary lamination process; at the same time, the main grid of the existing conventional photovoltaic cell is omitted to make a photovoltaic cell without a main grid, which also reduces the amount of silver paste used in the photovoltaic cell and reduces the manufacturing cost of the photovoltaic cell. The zero-stress adhesive technology of the photovoltaic cell without a main grid has become a new development direction of photovoltaic modules. It is innovative and superior in terms of product reliability, cost reduction per watt, and increased module power, and can be industrialized.

[0004] There are many ways to implement the zero-stress adhesive technology of the existing busbar-free photovoltaic cell. For example, the patent document number of the Swiss Meyer Burger Company is US8013239B2, and the patent name is a smart wire. By combining a polymer film with a conductive transmission copper strip, the smart wire directly replaces the busbar of the photovoltaic cell and is electrically connected to the fine grid line on the surface of the photovoltaic cell. However, the surface of the conductive transmission copper strip in the smart wire in the patent is covered with a polymer film layer, which not only increases the manufacturing cost, but also, this polymer film layer is not conducive to the current transmission between the conductive transmission copper strip and the photovoltaic cell fine grid itself, increases the resistance, and loses the current collection, which has an impact on the reliability of the component product, especially in the high and low temperature test TC, it cannot pass the test. For another example, the patent document number of the domestic Aikang Company is CN217280809U, and the patent name is a busbar-free photovoltaic module with a thin film, which covers the welding strip with a thin film, and the welding strip is fixed on the busbar-free photovoltaic cell by hot pressing of the thin film. The technical problem with this technical solution is that the film described in the patent includes an upper layer and a lower layer, the upper layer is made of a material with a light transmittance of more than 75%, and the lower layer is made of PO material or EVA material. After heating, the film will produce a cross-linking reaction and have a certain viscosity, which can fix the welding strip on the photovoltaic cell without a main grid. The lower layer material described in the patent realizes a cross-linking reaction by heating. If the amount of glue is too small, the welding strip cannot be fixed on the photovoltaic cell, and the process reliability problem cannot be solved; if the amount of glue is too large, the glue after the cross-linking reaction will inevitably penetrate between the welding strip and the thin grid line of the photovoltaic cell, forming an insulation barrier, and the current cannot be transmitted, resulting in reliability problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a glued photovoltaic cell string and a photovoltaic module to improve the reliability of the prepared photovoltaic module.

[0006] The technical solution adopted by the present invention to solve its technical problems is: an adhesive photovoltaic cell string, including photovoltaic cell sheets and welding strips, the photovoltaic cell sheets are connected into a string through the welding strips, and also include a first glue point and a film strip, the welding strip is a low-temperature welding strip, the film strip covers the surface of the photovoltaic cell sheet and the welding strip on the surface of the photovoltaic cell sheet, and is used to press and fix the welding strip on the photovoltaic cell sheet, the first glue point is located between the film strip and the photovoltaic cell sheet and avoids the welding strip, and is used to provide adhesive force to fix the film strip on the photovoltaic cell sheet, the film strip includes a low-fluidity or non-fluidity material layer and a thin glue layer, the low-fluidity or non-fluidity material layer is located on the film strip away from the light On one side of the photovoltaic cell, the thin adhesive layer is located on the side of the film strip close to the photovoltaic cell, the low fluidity or non-fluidity of the low-fluidity or non-fluidity material layer is used to prevent the material of the low-fluidity or non-fluidity material layer from entering between the welding tape and the photovoltaic cell, the film strip presses the welding tape to the photovoltaic cell through the low-fluidity or non-fluidity material layer, the thin adhesive layer is used to stick the film strip and the photovoltaic cell together, and the thinner thickness of the thin adhesive layer is used to prevent the material of the thin adhesive layer from entering between the welding tape and the photovoltaic cell; or, the film strip is made of low-fluidity or non-fluidity material to prevent the film strip material from entering between the welding tape and the photovoltaic cell.

[0007] It is further defined that it also includes a second glue point, and the two ends of the section of the welding tape located on the surface of the photovoltaic cell sheet are glued to the photovoltaic cell sheet through the second glue point.

[0008] It is further defined that the materials of the first glue dots and the second glue dots are light-curing glue.

[0009] It is further defined that the film strip extends along the welding strip and covers the entire section of the welding strip located on the surface of the photovoltaic cell; the surface of the photovoltaic cell has at least two film strips and gaps are left between the film strips.

[0010] It is further defined that the number of film strips on the surface of the photovoltaic cell is the same as the number of welding strips on the surface of the photovoltaic cell, and each film strip corresponds to one welding strip.

[0011] It is further defined that the thickness of the thin adhesive layer is between 0.03 mm and 0.10 mm.

[0012] It is further defined that the low-fluidity or non-fluidity material is PET, PVDF or PVB, and the material of the thin adhesive layer is one or a composite of more than one of polyurethane, EVA, PUR, TPO and PA.

[0013] It is further defined that the photovoltaic cell is a busbarless photovoltaic cell.

[0014] It is further defined that first glue dots are distributed on both sides of each welding strip.

[0015] A photovoltaic assembly comprises a photovoltaic cell string, wherein the photovoltaic cell string is the above-mentioned glued photovoltaic cell string.

[0016] The beneficial effects of the present invention are as follows: the scheme of the present invention is particularly suitable for busbarless photovoltaic cells, which have no busbar lines, saving silver paste, and do not require high-temperature welding during the photovoltaic cell stringing process, with zero stress, thus adapting to the thinning and low-temperature requirements of photovoltaic cells.

[0017] The film strips are fixed by applying glue. This method can ensure that the welding strips and film strips are fixed on the photovoltaic cell, which is production feasible.

[0018] The reliability of the product is ensured by the following points: First, the film strip is fixed by glue points, so that the film strip no longer needs a high amount of glue to ensure sufficient viscosity to fix the welding strip, and avoid excessive glue, which will cause the glue to penetrate between the welding strip and the fine grid lines of the photovoltaic cell to form an insulating barrier; second, the film strip of low-fluidity or non-fluidity material or the low-fluidity or non-fluidity material layer of the film strip ensures that the film strip can provide sufficient compression to make the welding strip and the fine grid lines fit tightly and reliably welded in the subsequent lamination steps; third, the film strip isolates the encapsulation film from the welding strip to prevent the encapsulation film from It penetrates between the welding ribbon and the fine grid lines of the photovoltaic cell to form an insulating barrier; fourthly, the welding ribbon is fixed by a film strip. Compared with the solution of directly fixing the welding ribbon by glue points, there are no glue points, interference and barriers between the welding ribbon and the photovoltaic cell, ensuring that the welding ribbon and the fine grid lines can fit tightly and can be reliably welded in the subsequent lamination steps. The second glue point plays an auxiliary fixing role for the welding ribbon and can be omitted. Moreover, the second glue point is located at both ends of the section of the welding ribbon located on the surface of the photovoltaic cell. These two ends are located at the edge of the photovoltaic cell and will not affect the current derived from the photovoltaic cell by the welding ribbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0020] Figure 1 is a schematic diagram of the cross-sectional view of a photovoltaic cell string according to Embodiment 1 of the present invention;

[0021] Figure 2 It is a flowchart of the process steps of fixing the front solder strip of Example 1 of the present invention by means of film strips and glue dots;

[0022] Figure 3 is a schematic diagram of applying glue on the front side of a photovoltaic cell according to Example 1 of the present invention;

[0023] Figure 4 is a schematic diagram of covering the front side of a photovoltaic cell sheet after glue application and ribbon wiring according to Embodiment 1 of the present invention with a film strip;

[0024] Figure 5is a schematic diagram of the front welding strip of Example 1 of the present invention being fixed by a film strip and glue dots;

[0025] Figure 6 It is an exploded schematic diagram of a soldering ribbon on a photovoltaic cell sheet of 18BB specification in Example 1 of the present invention being fixed by a film strip;

[0026] Figure 7 This is a schematic diagram of the structure of three 18BB photovoltaic cells connected in series through welding ribbons according to Example 1 of the present invention;

[0027] Figure 8 is an exploded schematic diagram of a photovoltaic module according to Example 1 of the present invention;

[0028] In the figure, 1. Photovoltaic cell, 1-1. Fine grid line, 2. Welding strip, 3. First glue point, 4. Film strip, 5. Second glue point, 6. Light-receiving glass, 7. Front encapsulation film, 8. Photovoltaic cell string, 9. Rear encapsulation film, 10. Backplane, DETAILED DESCRIPTION

[0029] Example 1

[0030] like Figures 1 to 8 As shown, an adhesive photovoltaic cell string includes a photovoltaic cell sheet 1, a welding ribbon 2, a first glue point 3 and a film strip 4. The number of photovoltaic cell sheets 1 is generally 2 to 36. The photovoltaic cell sheets 1 are connected into a string through the welding ribbon 2. The film strip 4 covers the surface of the photovoltaic cell sheet 1 and the welding ribbon 2 on the surface of the photovoltaic cell sheet 1, and is used to press and fix the welding ribbon 2 on the photovoltaic cell sheet 1. The first glue point 3 is located between the film strip 4 and the photovoltaic cell sheet 1 and avoids the welding ribbon 2, and is used to provide adhesive force to fix the film strip 4 on the photovoltaic cell sheet 1.

[0031] Each photovoltaic cell 1 has a welding strip 2 on the front and back sides. One side of the welding strip 2 connecting two adjacent photovoltaic cells 1 is located on the front side of the photovoltaic cell 1 , and the other side is located on the back side of the photovoltaic cell 1 .

[0032] When the photovoltaic cell 1 is a double-sided busbar-free photovoltaic cell, the number of the welding strips 2 is 12 to 24. The length of the double-sided busbar-free photovoltaic cell is L, the width is B, L=1B to 2B, and a plurality of fine grid lines 1-1 are distributed on the front and back of the photovoltaic cell 1. The fine grid lines 1-1 are formed by printing and curing silver paste and are attached to the vertically distributed welding strips 2.

[0033] The film strip 4 includes a low-fluidity or non-fluidity material layer and a thin adhesive layer. The low-fluidity or non-fluidity material layer is located on the side of the film strip 4 away from the photovoltaic cell 1, and the thin adhesive layer is located on the side of the film strip 4 close to the photovoltaic cell 1. The low fluidity or non-fluidity of the low-fluidity or non-fluidity material layer is used to prevent the material of the low-fluidity or non-fluidity material layer from entering between the welding strip 2 and the photovoltaic cell 1. The film strip 4 presses and fixes the welding strip 2 on the photovoltaic cell 1 through the low-fluidity or non-fluidity material layer. The thin adhesive layer is used to adhere the film strip 4 and the photovoltaic cell 1 together. The thinner thickness of the thin adhesive layer is used to prevent the material of the thin adhesive layer from entering between the welding strip 2 and the photovoltaic cell 1.

[0034] Generally, the thinner the thickness of the thin adhesive layer, the lower the viscosity. In the present invention, the film strip 4 no longer relies on the thin adhesive layer to fix the welding strip 2. The function of the thin adhesive layer is to avoid the formation of an air gap between the film strip 4 and the photovoltaic cell 1, which affects the power generation efficiency of the photovoltaic cell 1. Therefore, only a very thin adhesive layer is required.

[0035] In this embodiment 1, the film strip 4 is specifically a composite film composed of two layers of a base film and an adhesive film. The base film of the upper layer of the composite film is a low-fluidity or non-fluidity material layer, and the base film is a PET film, PVDF film or PVB film, etc. The adhesive film of the lower layer of the composite film is a thin adhesive layer, and the material is one or more of polyurethane, EVA, PUR, TPO and PA.

[0036] The welding strip 2 is a low temperature welding strip, which is a copper welding strip with a coating, the coating is a metal layer or an alloy layer, and the melting point of the coating satisfies the temperature between 120° C. and 160° C. The number of strips laid on the surface of the photovoltaic cell 1 can be 2 to 28.

[0037] The glued photovoltaic cell string also includes a second glue point 5, and the two ends of the section of the welding tape 2 located on the surface of the photovoltaic cell sheet 1 are glued to the photovoltaic cell sheet 1 through the second glue point 5. The second glue point 5 plays an auxiliary fixing role for the welding tape 2, improving the fixing reliability of the welding tape 2. At the same time, the position of the second glue point 5 is exactly the edge position of the photovoltaic cell sheet 1. Even if the photovoltaic cell sheet 1 and the welding tape 2 are insulated and isolated by the second glue point 5 at the edge position, it will not affect the current of the photovoltaic cell sheet 1 derived by the welding tape 2.

[0038] In order to avoid blocking light and affecting power generation efficiency, the film strip 4, the first glue spot 3 and the second glue spot 5 must be transparent.

[0039] The material of the first glue point 3 and the second glue point 5 is a light-curing glue, more specifically a UV light-curing glue. The light-curing glue is cured by specific light and can be cured at room temperature, and is suitable for low-temperature and high-efficiency photovoltaic cells 1, such as N-type HJT photovoltaic cells.

[0040] The film strip 4 extends along the welding strip 2 and covers the entire section of the welding strip 2 located on the surface of the photovoltaic cell 1; the number of film strips 4 on the surface of the photovoltaic cell 1 is the same as the number of welding strips 2 on the surface of the photovoltaic cell 1, each film strip 4 corresponds to a welding strip 2, and gaps are left between the film strips 4.

[0041] The film strip 4 is used and most of the cell surface is left out to ensure the packaging reliability of the photovoltaic module and avoid module delamination, which affects the reliability.

[0042] The first glue spots 3 are symmetrically distributed on both sides of each film strip 4, and the number of the first glue spots 3 of each film strip 4 is 4, 6, 8, 10, etc. The two ends of each welding strip 2 on the surface of the photovoltaic cell 1 are each provided with a second glue spot 5.

[0043] The thickness of the adhesive film, i.e., the thin adhesive layer, can be adjusted according to the fluidity of the adhesive film. The higher the fluidity of the adhesive film, the easier it is to penetrate between the welding ribbon 2 and the thin grid lines of the photovoltaic cell 1 during the lamination of the photovoltaic module, and the thinner the thickness of the adhesive film is required. When the material of the adhesive film is polyurethane, EVA, PUR, TPO or PA, the thickness of the thin adhesive layer is generally set to between 0.03 mm and 0.10 mm.

[0044] exist Figure 3 , 4 In and 5, the whole process of fixing the welding strip 2 on the front side of the photovoltaic cell 1 by the glue strip 4 and the glue point is shown, wherein the number of welding strips 2 on the front side of the photovoltaic cell 1 is 2, the distribution spacing of the first glue point 3 is b1, the film strip 4 is strip-shaped in appearance, and its width is b2 and the length is B, wherein b2 is greater than b1, and the length of the film strip 4 is equal to the width of the photovoltaic cell 1.

[0045] The number of the second glue dots 5 is 4, which are paired with 2 solder strips 2 . The number of the first glue dots 3 is 8, and 2 first glue dots 3 are set on one side of each solder strip 2 .

[0046] Figure 6 It is an exploded schematic diagram of a soldering ribbon 2 on a photovoltaic cell 1 of 18BB specification being fixed by a film strip 4, wherein the front and back sides of the photovoltaic cell 1 are both provided with 18 soldering ribbons 2 and matched with 18 film strips 4.

[0047] Figure 7 It is a schematic diagram of the structure in which three 18BB photovoltaic cells 1 are connected in series via a welding ribbon.

[0048] exist Figure 6 and Figure 7 In order to ensure the clarity of the figure, the fine grid line 1-1 is not shown.

[0049] like Figure 2As shown, the specific steps of fixing the welding strip 2 on the front side of the photovoltaic cell 1 of the photovoltaic cell string of this embodiment 1 by means of the film strip 4 and the glue point are as follows:

[0050] 1. Loading photovoltaic cells;

[0051] 2. Gluing: Glue is applied on the front side of the photovoltaic cell 1 to form a first glue point 3 and a second glue point 5 on the front side of the photovoltaic cell 1. There are two ways of applying glue, glue dispensing or printing, both of which can be achieved by automated equipment. Figure 3 ;

[0052] 3. Welding ribbon 2 wiring: wiring the welding ribbon 2 on the front side of the photovoltaic cell 1;

[0053] 4. Laying of film strip 4: Cover the film strip 4 on the welding strip 2, see Figure 4 ;

[0054] 5. Glue point curing: The first glue point 3 and the second glue point 5 are cured so that the first glue point 3 and the second glue point 5 can fix the soldering tape 2 and the film strip 4 on the front of the photovoltaic cell 1. Figure 5 When the first glue dot 3 and the second glue dot 5 are UV light-curing glue, the first glue dot 3 and the second glue dot 5 are cured by irradiation with UV light.

[0055] The specific steps of the welding strip 2 on the back of the photovoltaic cell 1 passing through the film strip 4 and the glue point need to be adjusted in combination with their respective positional relationships, and the specific steps are:

[0056] 1. Laying the membrane strip 4: Laying the membrane strip 4 on the preparation platform of the photovoltaic cell string;

[0057] 2. Routing of the soldering ribbon 2: Routing the soldering ribbon 2 onto the film strip 4;

[0058] 3. Loading the photovoltaic cell 1: Loading the photovoltaic cell 1 with glue applied on the back and covering it on the film strip 4 and the welding strip 2;

[0059] 4. Glue point curing: Curing the first glue point 3 and the second glue point 5 so that the first glue point 3 and the second glue point 5 can fix the soldering ribbon 2 and the film strip 4 on the back of the photovoltaic cell 1.

[0060] A photovoltaic module includes a photovoltaic cell string 8, wherein the photovoltaic cell string 8 is the glued photovoltaic cell string of this embodiment 1. In addition to the photovoltaic cell string 8, the photovoltaic module also includes a packaging structure for packaging the photovoltaic cell string 8, such as a light-receiving glass 6, a front packaging film 7, a rear packaging film 9 and a back sheet 10, which is the same as a conventional photovoltaic module in the prior art.

[0061] The preparation method of the photovoltaic module includes the steps of preparing a photovoltaic cell string, stacking and laminating. In the preparation step of the photovoltaic cell string, the welding tape is fixed to the photovoltaic cell sheet through a film strip glued by a first glue point, and the photovoltaic cell sheets are connected into a string. In the stacking step, the photovoltaic cell string and each layer of the photovoltaic module are stacked together, and then enter the laminating step. In the laminating step, the welding tape is welded to the photovoltaic cell sheet.

[0062] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention. For example, the following embodiments.

[0063] Example 2

[0064] The present embodiment 2 is basically the same as the embodiment 1, except that the film strip 4 is a single-layer film, and the material of the film strip 4 is a low-fluidity or non-fluidity material. The film strip 4 of the low-fluidity or non-fluidity material ensures that the film strip 4 can provide sufficient compression to make the welding strip 2 fit tightly with the fine grid line 1-1, while preventing the film strip 4 material from entering between the welding strip 2 and the photovoltaic cell 1.

[0065] Alternatively, although the membrane strip 4 is a double-layer or multi-layer membrane strip, each layer is made of a low-fluidity or non-fluidity material.

[0066] Example 3

[0067] The present embodiment 3 is basically the same as the embodiment 1, except that the second glue point 5 is omitted. Since the second glue point 5 is omitted, the first glue point 3 can be added at the end of the glue strip 4 to ensure the reliability of fixing the welding strip 2.

Claims

1. A glued photovoltaic cell string, comprising photovoltaic cell sheets (1) and welding strips (2), wherein the photovoltaic cell sheets (1) are connected into a string by the welding strips (2), and wherein: The device further comprises a first glue point (3) and a film strip (4); the welding strip (2) is a low-temperature welding strip; the film strip (4) covers the surface of the photovoltaic cell (1) and the welding strip (2) on the surface of the photovoltaic cell (1) and is used to press and fix the welding strip (2) on the photovoltaic cell (1); the first glue point (3) is located between the film strip (4) and the photovoltaic cell (1) and avoids the welding strip (2) and is used to provide adhesive force to fix the film strip (4) on the photovoltaic cell (1); The film strip (4) comprises a low-fluidity or non-fluidity material layer and a thin adhesive layer. The low-fluidity or non-fluidity material layer is located on the side of the film strip (4) facing away from the photovoltaic cell sheet (1), and the thin adhesive layer is located on the side of the film strip (4) close to the photovoltaic cell sheet (1). The low fluidity or non-fluidity of the low-fluidity or non-fluidity material layer is used to prevent the material of the low-fluidity or non-fluidity material layer from entering between the welding strip (2) and the photovoltaic cell sheet (1). The film strip (4) presses and fixes the welding strip (2) on the photovoltaic cell sheet (1) through the low-fluidity or non-fluidity material layer. The thin adhesive layer is used to adhere the film strip (4) and the photovoltaic cell sheet (1) together. The thinner thickness of the thin adhesive layer is used to prevent the material of the thin adhesive layer from entering between the welding strip (2) and the photovoltaic cell sheet (1). Alternatively, the film strip (4) is a low-fluidity or non-fluidity material, which is used to prevent the film strip (4) material from entering between the welding strip (2) and the photovoltaic cell sheet (1).

2. The adhesive photovoltaic cell string according to claim 1, characterized in that: It also comprises a second glue point (5), and the two ends of the section of the welding strip (2) located on the surface of the photovoltaic cell sheet (1) are glued to the photovoltaic cell sheet (1) through the second glue point (5).

3. The adhesive photovoltaic cell string according to claim 2, characterized in that: The materials of the first glue dots (3) and the second glue dots (5) are light-curing glue.

4. The adhesive photovoltaic cell string according to claim 1, characterized in that: The film strip (4) extends along the welding strip (2) and covers the entire section of the welding strip (2) located on the surface of the photovoltaic cell sheet (1); The surface of the photovoltaic cell sheet (1) has at least two film strips (4) and gaps are left between the film strips (4).

5. The adhesive photovoltaic cell string according to claim 4, characterized in that: The number of film strips (4) on the surface of the photovoltaic cell (1) is the same as the number of welding strips (2) on the surface of the photovoltaic cell (1), and each film strip (4) corresponds to one welding strip (2).

6. The adhesive photovoltaic cell string according to claim 1, characterized in that: The thickness of the thin adhesive layer is between 0.03 mm and 0.10 mm.

7. The adhesive photovoltaic cell string according to claim 1, characterized in that: The low-fluidity or non-fluidity material is PET, PVDF or PVB, and the material of the thin adhesive layer is one of polyurethane, EVA, PUR, TPO and PA or a composite of more than one.

8. The adhesive photovoltaic cell string according to claim 1, characterized in that: The photovoltaic cell (1) is a main grid-free photovoltaic cell.

9. The adhesive photovoltaic cell string according to claim 1, 4 or 5, characterized in that: First glue dots (3) are distributed on both sides of each welding strip (2).

10. A photovoltaic module, comprising a photovoltaic cell string (8), characterized in that: The photovoltaic cell string (8) is the glued photovoltaic cell string as claimed in any one of claims 1 to 8.

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