Battery piece complex and photovoltaic module

Abstract

The utility model discloses a battery piece composite body, including insulating strip 1, interconnection strip 2, bus bar 3 and at least two battery pieces 4, the interconnection strip 2 is contacted with two adjacent battery pieces 4 to make the two adjacent battery pieces 4 form electric connection, the bus bar 3 is connected with the interconnection strip 2, the insulating strip 1 is located on at least one side of the bus bar 3, and / or the interconnection strip 2 is located on at least one side of the bus bar 3. The insulating strip 1 is located in a gap between the adjacent battery pieces 4 and located on at least one side of the interconnection strip 2, and the insulating strip 1 located on at least one side of the bus bar 3 and the insulating strip 1 located in the gap between the adjacent battery pieces 4 and located on at least one side of the interconnection strip 2 are the same or different in width and length. The utility model also discloses a photovoltaic assembly. The battery piece composite body is attractive and reliable, the fragment rate in the storage, transportation and use process is low, the insulation strips are good in weather resistance and not prone to displacement, and the battery piece composite body has important significance on attractiveness and long-term service reliability of a photovoltaic assembly.

Description

Technical Field

[0001] The utility model relates to the photovoltaic field, in particular to a battery sheet complex and a photovoltaic component. Background Art

[0002] Since 2015, PERC cells have been increasing in volume and gradually become the mainstream cells in the market. However, the conversion efficiency of PERC and PERC+ cells is close to the ceiling, and the bottleneck of efficiency improvement has emerged. As more cutting-edge photovoltaic cell technologies, IBC (or HBC / TBC) and other cells have obvious performance advantages and are expected to become tomorrow's stars. In order to improve the utilization rate of light and the efficiency of components, in addition to improving the performance of cells, the arrangement of cells will also be improved. Generally speaking, the smaller the gap between cells, the better, but too small a gap between cells or even paralleling of cells will lead to short circuits or hidden cracks in the cells, which will seriously affect the service life of photovoltaic components. In addition, due to the curvature and yield strength of the interconnection strip (welding strip), the gap between cells cannot be infinitely small. That is, there must be a gap between cells, but the backplane color and the metallic luster of the welding strip in the gap will cause the overall color of the component to be inconsistent and unsightly. In addition to the welding strip in the gap, the metallic luster, irregular surface texture and welding points of the busbars that connect the welding strips and are used to transmit current also seriously affect the aesthetic appearance of the components.

[0003] In the prior art, insulating strips of a specific width are placed between battery cells during the preparation of components to cover the welding strips. After covering, the overall component looks uniform in color and beautiful in appearance. However, simply stacking the front panel, front film, insulating strips, battery cell layer, rear film, and back panel and then laminating them cannot guarantee that the insulating strips will not shift under the combined effect of friction, its own molten flow, external force caused by the molten flow of the film, and other factors. In addition to causing the insulating strips to lose their own covering and aesthetic function, the displacement may also cause hidden cracks in the battery cells or reduce the light-receiving area, reduce efficiency, and cause local heating and damage to the component due to blocking the battery cells. In addition, the process of stacking insulating strips at specific locations will also bring additional burdens to component manufacturers. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a battery sheet complex.

[0005] To achieve the above purpose, the technical method adopted by the utility model is as follows:

[0006] A battery cell complex comprises an insulating strip 1, an interconnecting strip 2, a bus bar 3 and at least two battery cells 4, wherein the interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4, the bus bar 3 is connected to the interconnecting strip 2, the insulating strip 1 is located on at least one side of the bus bar 3, and / or the insulating strip 1 is located in a gap between adjacent battery cells 4 and on at least one side of the interconnecting strip 2; the width R1 of the insulating strip 1 is 2-30 mm, the thickness H1 of the insulating strip 1 is 10-500 μm, and the height H2 of the battery cell complex is 200-2500 μm.

[0007] Furthermore, a ratio R1:R2 of the width of the insulating strip 1 to the width of the bus bar 3 is (1-3):1.

[0008] Furthermore, the ratio R1:R3 of the width of the insulating strip 1 to the width of the gap between the adjacent battery cells 4 is (0.8-10):1.

[0009] Furthermore, a width R1 of the insulating strip 1 is greater than a width R3 of a gap between adjacent battery cells 4 , and the insulating strip 1 is at least partially stacked on the battery cells 4 .

[0010] Furthermore, the total area of ​​the insulating strips 1 on the battery cells 4 accounts for 0.1%-30% of the area of ​​a battery cell 4 , and / or the total area of ​​the insulating strips 1 on the battery cells 4 accounts for 0.1%-90% of the area of ​​the insulating strips 1 .

[0011] Furthermore, a height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is not greater than 1500 microns.

[0012] Furthermore, the cross section of the insulating strip 1 is an irregular shape. In the height direction, the surface of one side of the insulating strip 1 is substantially flat, and the other side is a regular or irregular protrusion.

[0013] Furthermore, a groove is provided on the insulating strip 1, and the interconnection strip 2, the bus bar 3 and / or the battery cell 4 are partially embedded in the groove.

[0014] Furthermore, the insulating strip 1 includes a substrate layer 11 and an adhesive layer 12 located at least on one side of the substrate layer 11 .

[0015] Furthermore, the insulating strip 1 includes a substrate layer 11 , a weather-resistant layer 13 at least located on one side of the substrate layer 11 , and an adhesive layer 12 located on a side of the weather-resistant layer 13 away from the substrate layer 11 .

[0016] Another object of the present invention is to provide a photovoltaic module, which comprises the above-mentioned cell complex and protective layers located on both sides of the cell complex.

[0017] The beneficial effects of the technical solution of the utility model include:

[0018] The utility model provides a battery sheet complex and a photovoltaic module, which are different from the insulating strips in the prior art. The utility model complex can reduce the process of the module end and improve the production efficiency of the module while ensuring the appearance and preventing the displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A top view of a battery cell complex in one embodiment of the present application;

[0020] Figure 2 A top view of a battery cell complex in another embodiment of the present application;

[0021] Figure 3 A top view of a battery cell complex in another embodiment of the present application;

[0022] Figure 4 A top view of a battery cell complex in another embodiment of the present application;

[0023] Figure 5 A top view of a battery cell complex in another embodiment of the present application;

[0024] Figure 6 A side view of a battery cell complex in one embodiment of the present application;

[0025] Figure 7 A side view of a battery cell complex in another embodiment of the present application;

[0026] Figure 8 A side view of a battery cell complex in another embodiment of the present application;

[0027] Fig. 9 A side view of a battery cell complex in another embodiment of the present application;

[0028] Fig.10 An exploded view of the cross-sectional structure of a battery cell complex in one embodiment of the present application;

[0029] Fig.11 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0030] Fig.12 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0031] Fig.13 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0032] Fig.14 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0033] Fig.15 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0034] Fig.16 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0035] Fig.17 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0036] Fig.18 This is an exploded view of the cross-sectional structure of a battery cell complex in another embodiment of the present application;

[0037] Fig.19 A three-dimensional diagram of an insulating strip in one embodiment of the present application;

[0038] Fig. 20 A three-dimensional diagram of an insulating strip in another embodiment of the present application;

[0039] Fig.21 A three-dimensional diagram of an insulating strip in another embodiment of the present application;

[0040] Fig. 22 A three-dimensional diagram of an insulating strip in another embodiment of the present application;

[0041] Fig.23 A three-dimensional diagram of an insulating strip in another embodiment of the present application;

[0042] Fig.24 A three-dimensional diagram of an insulating strip in another embodiment of the present application;

[0043] In the figure: insulating strip 1, interconnecting strip 2, bus bar 3, battery cell 4, substrate layer 11, adhesive layer 12, weather-resistant layer 13. DETAILED DESCRIPTION

[0044] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0045] Unless otherwise defined, the technical terms or scientific terms used in the present invention should have the common meanings that can be understood by those skilled in the art in the field to which the present invention relates.

[0046] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0047] As analyzed in the background technology, the existence of gaps between battery cells, the metallic luster of interconnection strips (welding strips) and bus bars, irregular surface textures and welding points seriously affect the aesthetic appearance of the component. The insulating strips in the prior art will shift, and the displacement will not only cause the insulating strips to lose their own covering function, but may also cause hidden cracks in the battery cells or reduce the light-receiving area, reduce efficiency, and cause local heating and damage to the component due to blocking the battery cells. In addition, the process of stacking insulating strips at specific positions will also bring additional burdens to component manufacturers. The prior art cannot meet the basic requirements of the industrialization process for simple processes while taking into account both covering (aesthetics) and reliability. To solve this problem, the utility model provides a battery cell complex and a photovoltaic component.

[0048] In a typical embodiment of the present application, a battery cell complex is provided, comprising an insulating strip 1, an interconnecting strip 2, a bus bar 3 and at least two battery cells 4, wherein the interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4, the bus bar 3 is connected to the interconnecting strip 2, and the insulating strip 1 is located on at least one side of the bus bar 3. Figure 1 , and / or, the insulating strip 1 is located in the gap between adjacent battery cells 4 and on at least one side of the interconnection strip 2, such as Figure 2 , Figure 3 , Figure 4 , Figure 5The insulating strip 1 located in the gap between adjacent battery cells 4 can partially or completely block the metallic luster and irregular surface texture of the interconnection strip 2. Moreover, since the battery cell complex of the present application is a whole, the displacement of the insulating strip that will inevitably occur when the insulating strips are stacked before the assembly is prepared can be effectively avoided. In addition, the existence of the insulating strip 1 (the insulating strip 1 and the interconnection strip 2 or the insulating strip 1 and the interconnection strip 2 and the battery cell 4) can ensure to a certain extent that the position of the battery cells 4 during the movement of the stacking parts before the assembly is laminated and during the assembly lamination process remains relatively fixed, reduces displacement, and reduces the bending and displacement of the interconnection strip 2 in the gap between the battery cells 4 caused by the relative displacement between the battery cells 4. The insulating strip 1 located on at least one side of the bus bar 3 can separate, insulate and fix the bus bars 3, and can also avoid the adverse effects of the metallic gloss of the bus bar 3, the irregular surface texture and the irregular welding points caused by the welding of the bus bar 3 and the interconnection strip 2 on the aesthetic appearance of the component; in addition, the battery cell complex as a whole will also avoid the displacement of the insulating strip on at least one side of the bus bar 3 caused by stacking the insulating strips before the preparation of the component, which will cause the bus bars 3 that should be separated and insulated to contact each other, resulting in a short circuit and component damage. The width and length of the insulating strips 1 located at least on one side of the bus bar 3, the insulating strips 1 located at the gap between adjacent cells 4 and at least on one side of the interconnection strip 2, the insulating strips 1 located at least on one side of the bus bar 3, and the insulating strips 1 located at the gap between adjacent cells 4 and at least on one side of the interconnection strip 2 are the same, or the width and length of the insulating strips 1 can be adjusted according to factors such as the size and shape of the gap between adjacent cells 4, the size of the bus bar 3 and its distance from the edge of the cell, and the width and length of the insulating strips 1 at different locations can be different. Fig.15 , Fig.18 As shown, the insulating strip 1 may be arranged on one side of the interconnection strip 2 and / or the bus bar 3 , or may be arranged on both sides of the interconnection strip 2 and / or the bus bar 3 .

[0049] In order to ensure the covering effect of the insulating strip 1, the contact area between the insulating strip 1 and the interconnection strip 2, the bus bar 3 and the battery cell 4 is sufficient, the bonding strength of the various components of the composite is reliable, and thus the reliability of the composite as a whole is ensured, and it is avoided that the insulating strip 1 blocks the battery cell 4 too much, affecting the light receiving area and efficiency of the component, and the insulating strip 1 blocks other electrical connections and causes short circuits or short circuits. At the same time, considering the manufacturing cost of the insulating strip 1, the width R1 of the insulating strip 1 is controlled to be 2-30mm; preferably, the width of the insulating strip 1 is 2.0mm, 2.5mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm, 5.0mm , 5.5mm, 6.0mm, 6.5mm, 7.0mm, 7.5mm, 8.0mm, 8.5mm, 9.0mm, 9.5mm, 10.0mm, 10.5mm, 11.0mm, 12.0mm, 13.0mm, 14.0mm, 15.0mm, 16.0mm, 17.0mm, 18.0mm, 19.0mm, 20.0mm, 21.0mm, 22.0mm, 23.0mm, 24.0mm, 25.0mm, 26.0mm, 27.0mm, 28.0mm, 29.0mm, 30.0mm.

[0050] In one embodiment of the present application, the thickness H1 of the insulating strip 1 is 10-500 microns. Figure 6 , Figure 7 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.16 , Fig.17 As shown, H1 refers to the vertical distance between the horizontal plane where the highest point of the insulating strip 1 is located and the horizontal plane where the lowest point is located in the vertical direction. A thicker insulating strip 1 is costly and will cause bulging in a local area of ​​the cell complex, affecting the flatness of the appearance and not conforming to the trend of thinning modules. In addition, a thicker insulating strip 1 will also cause hidden cracks in the cell during the preparation of the module (when the stack is laminated), affecting the reliability of the module. However, if the thickness of the insulating strip 1 is too small, it is easy to wrinkle, which will also affect the appearance of the module. Preferably, the thickness H1 of the insulating strip 1 is 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 120 μm, 140 μm, 160 μm, 180 μm, 200 μm, 220 μm, 240 μm, 260 μm, 280 μm, 300 μm, 320 μm, 340 μm, 360 μm, 380 μm, 400 μm, 420 μm, 440 μm, 460 μm, 480 μm, or 500 μm.

[0051] In one embodiment of the present application, in order to further reduce the risk of hidden cracks in the cell and make the assembly thinner, the height H2 of the cell complex is limited to 200-2500 microns. Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the height H2 of the cell complex refers to the vertical distance between the horizontal plane where the highest point of the cell complex is located and the horizontal plane where the lowest point of the cell complex is located in the vertical direction.

[0052] In one embodiment of the present application, in order to ensure that the insulating strip 1 completely covers the bus bar 3, the width of the insulating strip 1 is set to be greater than or equal to the width of the bus bar 3. In addition, in order to control costs and prevent the insulating strip from blocking the battery cell, the ratio of the width of the insulating strip 1 to the bus bar 3 is preferably (1-3):1, and preferably R1:R2 is (1-2):1. Figure 1 , Figure 7 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 , Fig.14 , Fig.16 , Fig.17 As shown, when the insulating strip 1 is rectangular in shape or its projection on the horizontal plane is rectangular, the width R1 of the insulating strip is the width of the rectangle; when the insulating strip 1 is other shapes, R1 represents the maximum width of the projection of the insulating strip 1 on the horizontal plane in the extension direction of the interconnection strip 2.

[0053] In one embodiment of the present application, the ratio R1:R3 of the width of the insulating strip 1 to the width of the gap between the adjacent battery cells 4 is (0.8-10):1. Figure 1 As shown, R3 refers to the minimum distance between two adjacent cells in the extension direction of the interconnection strip 2. If the (R1:R3) ratio is less than 0.8, the insulating strip 1 is not enough to block the cell gap; if the (R1:R3) ratio is greater than 10, the insulating strip 1 blocks too large an area of ​​the cell, seriously affecting the efficiency of the module. The (R1:R3) ratio is in the range of 0.8-10, which can ensure both the shielding function and the efficiency of the module. In order to further improve the efficiency of the module, it is preferred that R1:R3 is (0.8-8):1, (0.8-5):1, (0.8-3):1, and it is further preferred that R1:R3 is (0.8-2):1.

[0054] In one embodiment of the present application, in order to further prevent the insulating strip 1 from shifting, or to prevent the shielding function from being affected even if it is partially shifted, the width R1 of the insulating strip 1 is limited to be greater than the width R3 of the gap between adjacent battery cells 4, and the insulating strip 1 is at least partially stacked on the battery cell 4, that is, the ratio (R1: R3) is greater than 1.

[0055] In one embodiment of the present application, in order to prevent the insulating strip 1 from shifting, it is set that the insulating strip 1 and the surface of the battery cell 4 are partially bonded. The bonding force between the insulating strip 1 and the interconnection strip 2, the bus bar 3, and the battery cell 4 can prevent the insulating strip 1 from shifting to a certain extent, and in the case where the insulating strip 1 and the surface of the battery cell 4 are partially bonded, even if there is a slight shift, complete shielding can be guaranteed; but if there is too much shielding, not only will the efficiency of the component be greatly affected, but the manufacturing cost of the insulating strip 1 will also be greatly increased. Therefore, it is limited that the total area of ​​the insulating strip 1 located on the battery cell 4 accounts for 0.1%-30% of the area of ​​a battery cell 4. In order to further improve the efficiency of the component, it is preferred that the total area of ​​the insulating strip 1 located on the battery cell 4 accounts for 0.1%-25%, 0.1%-20%, 0.1%-15%, 0.1%-10%, 0.1%-5%, 0.1%-4%, 0.1%-3%, 0.1%-2%, and further preferably 0.1%- 1%, 0.1%-0.5%; and / or, the total area of ​​the insulating strip 1 located on the battery cell 4 accounts for 0.1%-90% of the area of ​​the insulating strip 1, preferably, the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 0.1%-80%, 0.1%-70%, 0.1%-60%, 0.1%-50%, 0.1%-40%, 0.1%-30%, 0.1%-20% of the area of ​​the insulating strip 1, further preferably 0.1%-10%, 0.1%-5%.

[0056] In one embodiment of the present application, in order to further reduce the risk of hidden cracks in the battery cell and make the component thinner, as shown in FIG. Figure 6 , Figure 7 , Figure 8 , Fig. 9 As shown, the height difference ΔH from the highest point O of the cell complex to the lowest point on the upper surface of the cell 4, that is, the vertical distance from the horizontal plane where the highest point O of the cell complex is located to the horizontal plane where the lowest point on the upper surface of the cell 4 is located, is not higher than 1500 microns.

[0057] In one embodiment of the present application, since the interconnection bar 2, bus bar 3, battery cell 4 and battery cell gap together form an uneven whole, in order to improve the adaptability of the insulating strip 1 to the whole, the cross section of the insulating strip 1 is set to an irregular shape, and in the height direction, the surface of one side of the insulating strip 1 is basically flat, and the other side is a regular or irregular protrusion. Figure 8-Figure 14 , Figure 16-17 As shown, the other side of the insulating strip 1 has regular or irregular protrusions, which can reduce the degree of melt flow deformation of the insulating strip 1 in order to adapt to the whole during the lamination process, reduce the possibility of displacement, and improve the production efficiency and reliability.

[0058] In one embodiment of the present application, in order to further reduce the displacement of the insulating strip, improve the compatibility of the insulating strip with the above-mentioned whole, and improve the reliability, as Figure 8 , Figure 10-Figure 14 , Fig.16 , Fig.17 , Figure 19-Figure 24 As shown, the insulating strip 1 is provided with a groove, and the interconnection strip 2, the bus bar 3 and / or the battery cell 4 are partially embedded in the groove. The shape of the groove can be regular or irregular, and preferably the shape of the groove and the surface of the interconnection strip 2, the bus bar 3 and the battery cell 4 that contacts the insulating strip 1 are complementary, but do not need to be completely matched.

[0059] In one embodiment of the present application, the insulating strip 1 includes a substrate layer 11 and an adhesive layer 12 located at least on one side of the substrate layer 11. The substrate layer 1 determines the overall hardness of the insulating strip 1 to prevent the insulating strip 1 from warping, wrinkling, etc. The adhesive layer 12 is used to bond the insulating strip 1 to other parts of the battery cell complex, such as the interconnection strip 2, the bus bar 3, and the battery cell 4, to prevent the insulating strip 1 from shifting during the component lamination process.

[0060] In one embodiment of the present application, the insulating strip 1 includes a substrate layer 11, a weather-resistant layer 13 at least located on one side of the substrate layer 11, and an adhesive layer 12 located on a side of the weather-resistant layer 13 away from the substrate layer 11. The weather-resistant layer 13 is used to improve the aging resistance of the insulating strip as a whole, and is disposed between the substrate layer 11 and the adhesive layer 12 to improve the peel strength between the substrate layer 11 and the adhesive layer 12.

[0061] In another typical embodiment of the present application, a photovoltaic module is provided. The photovoltaic module includes the above-mentioned cell complex and protective layers located on both sides of the cell complex.

[0062] In another typical embodiment of the present application, the protective layer includes a front glass panel and a back glass panel.

[0063] In another typical embodiment of the present application, the photovoltaic module further comprises a front layer packaging film between the front glass plate and the cell complex, and / or a rear layer packaging film between the back glass plate and the cell complex.

[0064] The beneficial effects of the present application will be further illustrated below in combination with embodiments and comparative examples.

[0065] Example 1

[0066] A battery cell composite, such as Figure 2, including an insulating strip 1, an interconnecting strip 2, a bus bar 3 and two battery cells 4, the interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4, the bus bar 3 is connected to the interconnecting strip 2, the insulating strip 1 is located on one side of the bus bar 3, the gap between adjacent battery cells 4 and on one side of the interconnecting strip 2, the insulating strip 1 located on one side of the bus bar 3 and the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnecting strip 2 have the same width and length. The cross section of the insulating strip 1 is rectangular.

[0067] The width R1 of the insulating strip 1 is 5 mm, the width R2 of the bus bar 3 is 4 mm, and the ratio of the widths of the insulating strip 1 to the bus bar 3 (R1:R2) is 1.25.

[0068] The width R3 of the gap between adjacent battery cells 4 is 5 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 1.

[0069] The thickness H1 of the insulating strip 1 is 250 micrometers.

[0070] The height H2 of the cell complex is 1200 microns.

[0071] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 750 microns.

[0072] Example 2

[0073] Except for the following technical features, other technical features are the same as those of Example 1.

[0074] A battery cell composite, such as Figure 1 , including an insulating strip 1, an interconnecting strip 2, a bus bar 3 and two battery cells 4, the interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4, the bus bar 3 is connected to the interconnecting strip 2, and the insulating strip 1 is located on one side of the bus bar 3.

[0075] The width R1 of the insulating strip 1 is 5 mm, the width R2 of the bus bar 3 is 4 mm, and the ratio of the widths of the insulating strip 1 to the bus bar 3 (R1:R2) is 1.25.

[0076] The thickness H1 of the insulating strip 1 is 250 micrometers.

[0077] The height H2 of the cell complex is 1200 microns.

[0078] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 750 microns.

[0079] Example 3

[0080] Except for the following technical features, other technical features are the same as those of Example 1.

[0081] A battery cell complex includes an insulating strip 1, an interconnecting strip 2, a bus bar 3 and two battery cells 4. The interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4. The bus bar 3 is connected to the interconnecting strip 2. The insulating strip 1 is located in the gap between adjacent battery cells 4 and on one side of the interconnecting strip 2.

[0082] The width R1 of the insulating strip 1 is 5 mm.

[0083] The width R3 of the gap between adjacent battery cells 4 is 5 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 1.

[0084] The thickness H1 of the insulating strip 1 is 250 micrometers.

[0085] The height H2 of the cell complex is 950 μm.

[0086] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 500 microns.

[0087] Example 4

[0088] Except for the following technical features, other technical features are the same as those of Example 1.

[0089] A battery cell composite, such as Fig.18 , including an insulating strip 1, an interconnecting strip 2, a bus bar 3 and two battery cells 4, the interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4, the bus bar 3 is connected to the interconnecting strip 2, the insulating strip 1 is located on both sides of the bus bar 3, in the gap between adjacent battery cells 4 and on both sides of the interconnecting strip 2, and the insulating strips 1 located on both sides of the bus bar 3 and the insulating strips 1 located in the gap between adjacent battery cells 4 and on both sides of the interconnecting strip 2 have the same width and length.

[0090] The width R1 of the insulating strip 1 is 5 mm, the width R2 of the bus bar 3 is 4 mm, and the ratio of the widths of the insulating strip 1 to the bus bar 3 (R1:R2) is 1.25.

[0091] The width R3 of the gap between adjacent battery cells 4 is 5 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 1.

[0092] The thickness H1 of the insulating strip 1 is 250 micrometers.

[0093] The height H2 of the cell complex is 1450 μm.

[0094] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 750 microns.

[0095] Example 5

[0096] Except for the following technical features, other technical features are the same as those of Example 1.

[0097] The width R3 of the gap between adjacent battery cells 4 is 2 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 (R1:R3) is 2.5.

[0098] The insulating strip 1 is partially stacked on the battery cell 4 .

[0099] The area of ​​the insulating strip 1 located on one of the battery cells 4 accounts for 0.75% of the area of ​​the battery cell 4, the area of ​​the insulating strip 1 located on two battery cells 4 accounts for 1.5% of the area of ​​one battery cell 4, and the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 60% of the area of ​​the insulating strip 1.

[0100] Example 6

[0101] Except for the following technical features, other technical features are the same as those of Example 5.

[0102] The width R3 of the gap between adjacent battery cells 4 is 1 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 5.

[0103] The area of ​​the insulating strip 1 located on one of the battery cells 4 accounts for 1% of the area of ​​the battery cell 4 , the area of ​​the insulating strip 1 located on two battery cells 4 accounts for 2% of the area of ​​one battery cell 4 , and the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 80% of the area of ​​the insulating strip 1 .

[0104] Example 7

[0105] Except for the following technical features, other technical features are the same as those of Example 5.

[0106] The width R1 of the insulating strip 1 is 8 mm, the width R2 of the bus bar 3 is 4 mm, and the ratio of the widths of the insulating strip 1 and the bus bar 3 ( R1 : R2 ) is 2.

[0107] The width R3 of the gap between adjacent battery cells 4 is 1 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 8.

[0108] The area of ​​the insulating strip 1 located on one of the battery cells 4 accounts for 1.75% of the area of ​​the battery cell 4, the area of ​​the insulating strip 1 located on two battery cells 4 accounts for 3.5% of the area of ​​one battery cell 4, and the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 87.5% of the area of ​​the insulating strip 1.

[0109] Example 8

[0110] Except for the following technical features, other technical features are the same as those of Example 5.

[0111] The width R1 of the insulating strip 1 is 15 mm, the width R2 of the bus bar 3 is 5 mm, and the ratio of the widths of the insulating strip 1 and the bus bar 3 ( R1 : R2 ) is 3.

[0112] The width R3 of the gap between adjacent battery cells 4 is 1.5 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 10.

[0113] The area of ​​the insulating strip 1 located on one of the battery cells 4 accounts for 3.375% of the area of ​​the battery cell 4, the area of ​​the insulating strip 1 located on two battery cells 4 accounts for 6.75% of the area of ​​one battery cell 4, and the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 90% of the area of ​​the insulating strip 1.

[0114] Example 9

[0115] Except for the following technical features, other technical features are the same as those of Example 5.

[0116] The width R1 of the insulating strip 1 is 30 mm, the width R2 of the bus bar 3 is 6 mm, and the ratio of the widths of the insulating strip 1 and the bus bar 3 (R1:R2) is 5.

[0117] The width R3 of the gap between adjacent battery cells 4 is 1 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 ( R1 : R3 ) is 30.

[0118] The area of ​​the insulating strip 1 located on one of the battery cells 4 accounts for 7.25% of the area of ​​the battery cell 4, the area of ​​the insulating strip 1 located on two battery cells 4 accounts for 14.5% of the area of ​​one battery cell 4, and the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 96.7% of the area of ​​the insulating strip 1.

[0119] Example 10

[0120] Except for the following technical features, other technical features are the same as those of Example 9.

[0121] The battery in Example 9 was replaced with a half-cell battery.

[0122] The area of ​​the insulating strip 1 located on one of the battery cells 4 accounts for 14.5% of the area of ​​the battery cell 4 , the area of ​​the insulating strip 1 located on two battery cells 4 accounts for 29% of the area of ​​one battery cell 4 , and the area of ​​the insulating strip 1 located on the battery cell 4 accounts for 96.7% of the area of ​​the insulating strip 1 .

[0123] Embodiment 11

[0124] Except for the following technical features, other technical features are the same as those of Example 1.

[0125] The width R3 of the gap between adjacent battery cells 4 is 6.25 mm, and the ratio of the width of the insulating strip 1 to the width of the gap between adjacent battery cells 4 (R1:R3) is 0.8.

[0126] Example 12

[0127] Except for the following technical features, other technical features are the same as those of Example 1.

[0128] The thickness H1 of the insulating strip 1 is 10 micrometers.

[0129] The height H2 of the cell complex is 960 μm.

[0130] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 510 microns.

[0131] Example 13

[0132] Except for the following technical features, other technical features are the same as those of Example 1.

[0133] The thickness H1 of the insulating strip 1 is 100 micrometers.

[0134] The height H2 of the cell complex is 1050 μm.

[0135] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 600 microns.

[0136] Embodiment 14

[0137] Except for the following technical features, other technical features are the same as those of Example 1.

[0138] The thickness H1 of the insulating strip 1 is 150 micrometers.

[0139] The height H2 of the cell complex is 1100 microns.

[0140] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 650 microns.

[0141] Embodiment 15

[0142] Except for the following technical features, other technical features are the same as those of Example 4.

[0143] The thickness H1 of the insulating strip 1 is 350 micrometers.

[0144] The height H2 of the cell complex is 1650 μm.

[0145] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 850 microns.

[0146] Example 16

[0147] Except for the following technical features, other technical features are the same as those of Example 1.

[0148] The thickness H1 of the insulating strip 1 is 10 micrometers.

[0149] The height H2 of the cell complex is 270 micrometers.

[0150] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 170 microns.

[0151] Embodiment 17

[0152] Except for the following technical features, other technical features are the same as those of Example 1.

[0153] The thickness H1 of the insulating strip 1 is 250 micrometers.

[0154] The height H2 of the cell complex is 1550 μm.

[0155] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 1050 μm.

[0156] Embodiment 18

[0157] Except for the following technical features, other technical features are the same as those of Example 1.

[0158] The thickness H1 of the insulating strip 1 is 500 micrometers.

[0159] The height H2 of the cell complex is 2200 microns.

[0160] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 1500 microns.

[0161] Embodiment 19

[0162] Except for the following technical features, other technical features are the same as those of Example 1.

[0163] The thickness H1 of the insulating strip 1 is 30 micrometers.

[0164] The height H2 of the cell complex is 980 microns.

[0165] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 530 microns.

[0166] Embodiment 20

[0167] Except for the following technical features, other technical features are the same as those of Example 1.

[0168] The thickness H1 of the insulating strip 1 is 60 micrometers.

[0169] The height H2 of the cell complex is 1010 microns.

[0170] The height difference ΔH between the highest point O of the cell complex and the lowest point of the upper surface of the cell 4 is 560 microns.

[0171] Embodiment 21

[0172] Except for the following technical features, other technical features are the same as those of Example 1.

[0173] like Figure 8 As shown, the cross section of the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnection strip 2 is an irregular shape. In the height direction, the surface of one side of the insulating strip 1 is basically flat, and the other side is convex. The cross section of the insulating strip 1 located on one side of the bus bar 3 is a rectangle.

[0174] Embodiment 22

[0175] Except for the following technical features, other technical features are the same as those of Example 1.

[0176] like Fig.10 As shown, the cross section of the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnection strip 2 is an irregular shape. In the height direction, the surface of one side of the insulating strip 1 is basically flat, and the other side is convex. The cross section of the insulating strip 1 located on one side of the bus bar 3 is a rectangle.

[0177] Embodiment 23

[0178] Except for the following technical features, other technical features are the same as those of Example 1.

[0179] like Fig.11 As shown, the cross section of the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnection strip 2 is an irregular shape. In the height direction, the surface of one side of the insulating strip 1 is basically flat, and the other side is convex. The cross section of the insulating strip 1 located on one side of the bus bar 3 is a rectangle.

[0180] Embodiment 24

[0181] Except for the following technical features, other technical features are the same as those of Example 1.

[0182] like Fig.12 As shown, the cross section of the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnection strip 2 is an irregular shape. In the height direction, the surface of one side of the insulating strip 1 is basically flat, and the other side is convex. The cross section of the insulating strip 1 located on one side of the bus bar 3 is a rectangle.

[0183] Embodiment 25

[0184] Except for the following technical features, other technical features are the same as those of Example 1.

[0185] like Fig.13 As shown, a groove is formed on the insulating strip 1 on one side of the bus bar 3, and the interconnection bar, bus bar and battery cell are partially embedded in the groove. The cross section of the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnection bar 2 is rectangular.

[0186] Embodiment 26

[0187] Except for the following technical features, other technical features are the same as those of Example 1.

[0188] like Fig.14 As shown, a groove is provided on the insulating strip 1 located between the gaps between the adjacent battery cells 4 and on one side of the interconnection bar 2, and the interconnection bar, bus bar and battery cell are partially embedded in the groove. The cross section of the insulating strip 1 located on one side of the bus bar 3 is an irregular shape, and in the height direction, one side of the insulating strip 1 is substantially flat, and the other side is convex.

[0189] Embodiment 27

[0190] Except for the following technical features, other technical features are the same as those of Example 1.

[0191] like Fig. 20 As shown, a groove is formed on the insulating strip 1 on one side of the bus bar 3, and the interconnection bar, bus bar and battery cell are partially embedded in the groove. The cross section of the insulating strip 1 located in the gap between adjacent battery cells 4 and on one side of the interconnection bar 2 is rectangular.

[0192] Embodiment 28

[0193] Except for the following technical features, other technical features are the same as those of Example 1.

[0194] like Fig. 22 As shown, a groove is provided on the insulating strip 1 located between adjacent cells 4 and on one side of the interconnection strip 2, and the interconnection strip, bus bar and cell part are partially embedded in the groove. The cross section of the insulating strip 1 located on one side of the bus bar 3 is rectangular.

[0195] Embodiment 29

[0196] Except for the following technical features, other technical features are the same as those of Example 1.

[0197] like Fig.24 As shown, a groove is provided on the insulating strip 1 located between adjacent cells 4 and on one side of the interconnection strip 2, and the interconnection strip, bus bar and cell part are partially embedded in the groove. The cross section of the insulating strip 1 located on one side of the bus bar 3 is rectangular.

[0198] Embodiment 30

[0199] Except for the following technical features, other technical features are the same as those of Example 1.

[0200] The width R2 of the bus bar 3 is 5 mm, and the ratio of the width of the insulating strip 1 to the width of the bus bar 3 ( R1 : R2 ) is 1.

[0201] Embodiment 31

[0202] Except for the following technical features, other technical features are the same as those of Example 1.

[0203] The width R2 of the bus bar 3 is 6 mm, and the ratio of the width of the insulating strip 1 to the width of the bus bar 3 (R1:R2) is 0.83.

[0204] Application Examples

[0205] The backplane (Foster BEC-301), the rear layer film (Foster F406PS), the cell complex in the above Examples 1-29 (the cell is Aixun P-PERC cell, the interconnection strip and the welding ribbon are Ningbo Teso HD008), the front layer film (Foster F406PS), and the front glass (Fulite FGG 5X) are stacked and laminated at a lamination temperature of 150 degrees Celsius for 18 minutes to make a photovoltaic module, and the performance test is carried out.

[0206] Comparative Example 1

[0207] The back sheet (Foster BEC-301), the back layer adhesive film (Foster F406PS), the cell layer (the cell uses Aixu P-PERC cell, the interconnection bar and the welding strip use Ningbo Teso HD008), the insulating strip in Example 1, the front layer adhesive film (Foster F406PS), and the front plate glass (Folite FGG 5X) are stacked and laminated under the same conditions to make a photovoltaic module, and the performance test is carried out. The parameters such as the cell gap, the width of the bus bar and the interconnection bar are the same as those in Example 1.

[0208] Comparative Example 2

[0209] The back sheet (Foster BEC-301), the back layer film (Foster F406PS), the cell layer (the cell uses Aixu P-PERC cell, the interconnection bar and the welding ribbon use Ningbo Teso HD008), the front layer film (Foster F406PS), and the front glass (Folite FGG 5X) are stacked and laminated under the same conditions to make a photovoltaic module, and the performance test is carried out. The parameters such as the cell gap, the width of the bus bar and the interconnection bar are the same as those in Example 1.

[0210] Comparative Example 3

[0211] Except for the following technical features, other technical features are the same as those of Example 18.

[0212] The thickness H1 of the insulating strip 1 is 600 micrometers.

[0213] The height H2 of the cell complex is 2300 microns.

[0214] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 1600 microns.

[0215] The backplane (Foster BEC-301), the rear layer film (Foster F406PS), the above-mentioned cell complex (the cell is Aixun P-PERC cell, the interconnection strip and the welding ribbon are Ningbo Teso HD008), the front layer film (Foster F406PS), and the front glass (Fulite FGG 5X) are stacked and laminated at a lamination temperature of 150 degrees Celsius for 18 minutes to make a photovoltaic module, and the performance test is carried out.

[0216] Comparative Example 4

[0217] Except for the following technical features, other technical features are the same as those of Example 18.

[0218] A battery cell composite, such as Fig.18 , including an insulating strip 1, an interconnecting strip 2, a bus bar 3 and two battery cells 4, the interconnecting strip 2 contacts two adjacent battery cells 4 to form an electrical connection between the two adjacent battery cells 4, the bus bar 3 is connected to the interconnecting strip 2, the insulating strip 1 is located on both sides of the bus bar 3, in the gap between adjacent battery cells 4 and on both sides of the interconnecting strip 2, and the insulating strips 1 located on both sides of the bus bar 3 and the insulating strips 1 located in the gap between adjacent battery cells 4 and on both sides of the interconnecting strip 2 have the same width and length.

[0219] The thickness H1 of the insulating strip 1 is 500 micrometers.

[0220] The height H2 of the cell complex is 2700 microns.

[0221] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 1500 microns.

[0222] The backplane (Foster BEC-301), the rear layer film (Foster F406PS), the above-mentioned cell complex (the cell is Aixun P-PERC cell, the interconnection strip and the welding ribbon are Ningbo Teso HD008), the front layer film (Foster F406PS), and the front glass (Fulite FGG 5X) are stacked and laminated at a lamination temperature of 150 degrees Celsius for 18 minutes to make a photovoltaic module, and the performance test is carried out.

[0223] Comparative Example 5

[0224] Except for the following technical features, other technical features are the same as those of Example 1.

[0225] The thickness H1 of the insulating strip 1 is 5 micrometers.

[0226] The height H2 of the cell complex is 955 μm.

[0227] The height difference ΔH from the highest point O of the cell complex to the lowest point of the upper surface of the cell 4 is 505 microns.

[0228] The backplane (Foster BEC-301), the rear layer film (Foster F406PS), the above-mentioned cell complex (the cell is Aixun P-PERC cell, the interconnection strip and the welding ribbon are Ningbo Teso HD008), the front layer film (Foster F406PS), and the front glass (Fulite FGG 5X) are stacked and laminated at a lamination temperature of 150 degrees Celsius for 18 minutes to make a photovoltaic module, and the performance test is carried out.

[0229] Hereinafter, the sample evaluation methods and evaluation results of Examples and Comparative Examples will be described.

[0230]

Aging resistance

[0231] The test method refers to Q / CPVT005-2014 "PCT Accelerated Aging Environmental Test Method" to observe whether the insulation strip is wrinkled, shifted, or yellowed after 2000 days of damp heat aging.

[0232] [Module power]

[0233] The test method refers to IEC61215 "Ground Crystalline Silicon Photovoltaic Modules - Design Identification and Finalization", test conditions: AM 1.5, irradiance 1000W / m2, +25℃, 50%RH. Test and record the percentage increase or decrease in power of the module with insulating strips compared to the module without insulating strips (Comparative Example 2).

[0234]

Appearance

[0235] Observe whether the insulating strips in the laminated components are wrinkled or shifted, whether the battery cells have hidden cracks, whether bubbles appear near the insulating strips, and record whether the insulating strips that completely cover the battery cell gaps or bus bars before lamination leak the metallic luster of the battery cell gaps or bus bars after lamination.

[0236]

Bond strength

[0237] The test method is based on GB / T2790 "Adhesive 180° Peel Strength Test Method Flexible Material to Rigid Material", tensile speed: 100mm / min. Record the bonding strength between the insulating strip and the bus bar and / or interconnecting strip in the battery cell complex and record it.

[0238] Table 1: Application / Example and Comparative Example Evaluation Results

[0239]

[0240] Table 2: Application / Example and Comparative Example Evaluation Results Table Continuation

[0241]

[0242] Table 3: Application / Example and Comparative Example Evaluation Results Table Continuation

[0243]

[0244] Table 4: Application / Example and Comparative Example Evaluation Results Table Continuation

[0245]

[0246] As shown in Tables 1-4, the cell complex of Application (Implementation) Example 1-31 is applied to photovoltaic modules, and its comprehensive performance in aesthetics and reliability is better than that of Comparative Examples 1-5, and it can also take into account the module efficiency. The utility model creatively adopts the concept of cell complex, ensures the reliability of the bonding between the insulating strip and the interconnecting strip, bus bar and / or cell, effectively avoids the displacement of the insulating strip after lamination and aging, and is more efficient than the process method in the prior art in which a single insulating strip is stacked together with other hierarchical structures in the module and then laminated to form a photovoltaic module, and the reliability and aesthetics of the resulting photovoltaic module are greatly improved.

[0247] In summary, the battery cell complex using the solution of the utility model is beneficial for improving aesthetics, reliability, and production efficiency, and has good industrial applicability.

[0248] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A battery cell complex, characterized in that: The invention comprises an insulating strip (1), an interconnecting strip (2), a bus bar (3) and at least two battery cells (4), wherein the interconnecting strip (2) contacts two adjacent battery cells (4) to form an electrical connection between the two adjacent battery cells (4), the bus bar (3) is connected to the interconnecting strip (2), the insulating strip (1) is located on at least one side of the bus bar (3), and / or the insulating strip (1) is located in a gap between adjacent battery cells (4) and on at least one side of the interconnecting strip (2); the width R1 of the insulating strip (1) is 2-30 mm, the thickness H1 of the insulating strip (1) is 10-500 μm, and the height H2 of the battery cell complex is 200-2500 μm.

2. The battery cell complex according to claim 1, characterized in that: The ratio R1:R2 of the width of the insulating strip (1) to the width of the bus bar (3) is (1-3):

1.

3. The battery cell complex according to claim 1, characterized in that: The ratio R1:R3 of the width of the insulating strip (1) to the width of the gap between adjacent battery cells (4) is (0.8-10):

1.

4. The battery cell complex according to claim 1, characterized in that: The width R1 of the insulating strip (1) is greater than the width R3 of the gap between adjacent battery cells (4), and the insulating strip (1) is at least partially stacked on the battery cells (4).

5. The battery cell complex according to claim 4, characterized in that: The total area of ​​the insulating strip (1) located on the battery cell (4) accounts for 0.1%-30% of the area of ​​a battery cell (4), and / or the total area of ​​the insulating strip (1) located on the battery cell (4) accounts for 0.1%-90% of the area of ​​the insulating strip (1).

6. The battery cell complex according to claim 1, characterized in that: The height difference ΔH between the highest point O of the battery cell complex and the lowest point of the upper surface of the battery cell (4) is not higher than 1500 microns.

7. The battery cell complex according to claim 1, characterized in that: The cross section of the insulating strip (1) is an irregular shape. In the height direction, the surface of one side of the insulating strip (1) is basically flat, and the other side is a regular or irregular protrusion.

8. The battery cell complex according to claim 1, characterized in that: The insulating strip (1) is provided with a groove, and the interconnection strip (2), bus bar (3) and / or battery cell (4) are partially embedded in the groove.

9. The battery cell complex according to claim 1, characterized in that: The insulating strip (1) comprises a substrate layer (11) and an adhesive layer (12) located at least on one side of the substrate layer (11).

10. The battery cell complex according to claim 8, characterized in that: The insulating strip (1) comprises a substrate layer (11), a weather-resistant layer (13) located at least on one side of the substrate layer (11), and an adhesive layer (12) located on a side of the weather-resistant layer (13) away from the substrate layer (11).

11. A photovoltaic module, characterized in that: The photovoltaic module comprises the cell complex according to any one of claims 1 to 10 and protective layers located on both sides of the cell complex.

Images