A color battery assembly and photovoltaic system

Abstract

The utility model is suitable for photovoltaic technical field, provide a kind of color battery component and photovoltaic system, color battery component includes back sheet, back adhesive film, battery piece layer, color adhesive film, front glass;Battery piece layer includes multiple battery strings, multiple battery strings are connected in series and / or parallel by bus bar, battery string includes the reflectivity of the surface of several battery pieces that are connected in series by welding band in turn is less than 10% to visible light, back adhesive film is close to the surface of battery piece layer and is provided with first black background layer;The adjacent battery piece between battery string is provided with piece gap or the adjacent battery piece of battery string partially overlaps, and the front surface of the welding band located piece gap is provided with second black background layer;Bus bar is located at the back of battery string or bus bar is located at the outside of battery string, and the front surface of bus bar is provided with third black background layer.The color battery component of the utility model can reduce the color difference of front appearance, realize the consistency of color battery component front appearance color.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, and in particular to a colored battery module and photovoltaic system. Background Technology

[0002] In today's society, energy conflicts and environmental problems are becoming increasingly prominent, making the development of various clean energy sources an inevitable trend. In recent years, the photovoltaic industry has developed rapidly, with technological updates accelerating. Currently, the photovoltaic industry is moving towards product diversification, and building-integrated photovoltaics (BIPV) is one of the most important markets for photovoltaic power generation applications worldwide. Currently, colored solar cell modules in the industry achieve their colorization through colored glass, colored encapsulant films, or colored solar cells.

[0003] In related technologies, a colored solar cell module includes a backsheet, a back film, a cell layer, a front film, and a front glass, stacked sequentially. The cell layer comprises multiple cell strings, which are connected in series and / or parallel via busbars. Each cell string includes several cells connected in series via solder ribbons. Since the back film is typically transparent or white, and the solder ribbons and busbars are usually silver, after the colored solar cell module is encapsulated, the colors of the exposed back film, solder ribbons, and busbars on the front of the module differ significantly from the colors of the cells on the front. This results in poor color consistency on the front of the colored solar cell module, leading to an issue of inconsistent appearance. Utility Model Content

[0004] This invention provides a colored battery module, which aims to solve the problem of poor color consistency on the front of the colored battery module in the prior art, resulting in inconsistent appearance colors on the front of the colored battery module.

[0005] This utility model is implemented as follows: a colored battery assembly is provided, comprising a back plate, a back adhesive film, a battery cell layer, a colored adhesive film, and a front glass arranged in sequence. The battery cell layer includes multiple battery strings, which are connected in series and / or in parallel via busbars. Each battery string includes several battery cells connected in series via solder ribbons. The surface of the battery cell near the colored adhesive film has a visible light reflectance of less than 10%. The surface of the back adhesive film near the battery cell layer is provided with a first black background layer. A gap is provided between adjacent cells of the battery string or the adjacent cells of the battery string partially overlap, and a second black background layer is provided on the front side of the solder strip located in the gap; The busbar is located on the back of the battery string, or the busbar is located on the outside of the battery string, and the front of the busbar is provided with a third black background layer.

[0006] Preferably, the back adhesive film is a white adhesive film or a transparent adhesive film, and the first black background layer is a black coating applied to the back adhesive film.

[0007] Preferably, the second black background layer is a black masking strip disposed on the solder strip or a black coating applied to the solder strip.

[0008] Preferably, the third black background layer is a black shielding strip disposed on the busbar or a black coating applied to the busbar.

[0009] Preferably, the busbar is located on the back of the battery string, and an insulating strip is provided between the busbar and the battery cells of the battery string.

[0010] Preferably, a gap is provided between adjacent battery strings, the busbar is located on the back of the battery string, and the front of the busbar located in the gap is set to black; or, there is no gap between adjacent battery strings.

[0011] Preferably, the busbar is located on the outside of the battery string, the battery cells located at the end of the battery string are connected to the busbar through the solder strip, and the front side of the solder strip connecting the busbar is provided with a fourth black background layer.

[0012] Preferably, the thickness of the colored adhesive film is 0.05~1mm.

[0013] Preferably, the second black background layer fills the gaps between the cells, and the second black background layer does not overlap with the front side of the battery cell.

[0014] Preferably, the second black background layer partially fills the gap between the sheets, and the second black background layer partially overlaps the front side of the battery sheet.

[0015] Preferred options also include: A UV cut-off film is disposed between the colored adhesive film and the front glass. The UV cut-off film has an average transmittance of less than 15% for light with a wavelength range of 250~350 nanometers.

[0016] This utility model also provides a photovoltaic system, including the aforementioned colored battery module.

[0017] This invention provides a colored battery module by ensuring that the surface of the battery cells near the colored adhesive film has a visible light reflectance of less than 10%, while a first black background layer is provided on the surface of the back adhesive film near the battery cells. This allows the area of ​​the back adhesive film not covered by the battery cells to present a colored effect when combined with the colored adhesive film. Furthermore, gaps are provided between adjacent battery cells in the battery string, and a second black background layer is provided on the front side of the solder ribbon located in the gap, or the adjacent battery cells in the battery string partially overlap, reducing the color difference between the solder ribbon and the front battery cells of the colored battery module. The busbar is located on the outside of the battery string, and a third black background layer is provided on the front side of the busbar, or the busbar is located on the back of the battery string, reducing the color difference between the busbar and the front battery cells of the colored battery module. Therefore, this invention avoids the influence of the colors of the back adhesive film, solder ribbon, and busbar on the front appearance color of the colored battery module, achieving a consistent and more harmonious front appearance color of the colored battery module. Attached Figure Description

[0018] Figure 1 A front view of a color battery assembly provided for an embodiment of this utility model; Figure 2 for Figure 1 A cross-sectional view along the AA direction; Figure 3 for Figure 1 Cross-sectional view along the BB direction; Figure 4 A rear view of another colored battery assembly provided for an embodiment of this utility model; Figure 5 This is a cross-sectional schematic diagram of another color battery assembly provided in an embodiment of the present utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of 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 and are only used to explain the present utility model, and should not be construed as limiting the present utility model. Furthermore, it should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "backlight", "front", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0023] Please refer to Figures 1-4 The present invention provides a colored battery assembly 100, which includes a back plate 1, a back adhesive film 2, a battery cell layer 3, a colored adhesive film 4, and a front glass 5 stacked in sequence. The battery cell layer 3 includes multiple battery strings 31, which are connected in series and / or in parallel via busbars 6. Each battery string 31 includes several battery cells 311 connected in series via solder ribbons 310. The surface of the battery cell 311 near the colored adhesive film 4 has a visible light reflectance of less than 10%. The back adhesive film 2 near the surface of the battery cell layer 3 is provided with a first black background layer 7. A gap 312 is provided between adjacent cells 311 of the battery string 31 or the adjacent cells 311 of the battery string 31 partially overlap, and a second black background layer 8 is provided on the front side of the solder strip 311 located in the gap 312. Busbar 6 is located on the back of battery string 31, or busbar 6 is located on the outside of battery string 31, and a third black background layer 9 is provided on the front of busbar 6.

[0024] In this embodiment of the present invention, the battery cell 311 can specifically be a back-contact solar cell with a black front side, that is, the positive electrode and the negative electrode of the battery cell 311 are both disposed on the back side of the battery cell 311.

[0025] It should be noted that, in this embodiment of the invention, "color" refers to colors other than black and white.

[0026] In this embodiment of the present invention, a first black background layer 7 is provided on the surface of the back adhesive film 2 near the battery cell layer 3, that is, the first black background layer 7 is provided on the front side of the back adhesive film 2, so that the front side of the back adhesive film 2 is black, and the area of ​​the back adhesive film 2 not covered by the battery cell 311 is combined with the colored adhesive film 4 to present a colored effect, avoiding obvious color difference between the color of the back adhesive film 2 on the front side of the colored battery assembly 100 and the color of the battery cell 311 on the front side of the colored battery assembly 100, so that the front appearance color of the colored battery assembly 100 is more harmonious; moreover, the reflectivity of the surface of the battery cell 311 near the colored adhesive film 4 to visible light (wavelength of 380~780 nanometers) is less than 10%, that is, the front side of the battery cell 311 itself is black, and the black front side of the battery cell 311 combined with the colored adhesive film 4 makes the battery cell 311 present a colored effect on the front side of the colored battery assembly 100.

[0027] In this embodiment of the invention, the battery cell layer 3 includes multiple battery strings 31, which are connected in series and / or in parallel via busbars 6. Each battery string 31 includes a plurality of battery cells 311 connected in series via solder strips 310. The number of battery strings 31 in the battery cell layer 3 is not limited, nor is the number of battery cells 311 included in each battery string 31.

[0028] in, Figure 1 The diagram illustrates 12 battery strings 31, with 6 strings in the upper half and 6 strings in the lower half of the color battery assembly 100. Each battery string 31 includes 9 battery cells 311. A gap 312 is provided between adjacent battery cells 311 in each battery string 313. Adjacent battery strings 311 can have gaps between them, or they can be without gaps. The busbar 6 located at the end of the color battery assembly 100 is an edge busbar, and the busbar 6 located in the middle of the color battery assembly 100 is a middle busbar. The series and parallel connection method of the battery strings 31 is not limited. For example, in battery strings 31 arranged sequentially along the X direction, adjacent battery strings 31 arranged along the X direction are connected in series in pairs through the end busbars, while two adjacent battery strings 31 arranged along the Y direction are connected in parallel through the middle busbar.

[0029] Figure 4 The diagram illustrates 12 battery strings 31. The upper and lower halves of the color battery assembly 100 each have 6 battery strings 31, and the battery strings 31 in the upper and lower halves of the color battery assembly 100 are symmetrical about the central axis L of the color battery assembly 100. Each battery string 31 includes 9 battery cells 311. Adjacent battery cells 311 in the battery string 313 partially overlap. There may be gaps between adjacent battery strings 31, or no gaps may be provided. The busbar 6 located at the end of the color battery assembly 100 is an edge busbar, and the busbar 6 located in the middle of the color battery assembly 100 is a middle busbar. The series and parallel connection method of the battery strings 31 is not limited. For example, in battery strings 31 arranged sequentially along the X direction, adjacent battery strings 31 arranged along the X direction are connected in pairs through the end busbars, while two adjacent battery strings 31 arranged along the Y direction are connected in parallel through the middle busbar.

[0030] like Figure 1 and Figure 2 As shown in this embodiment of the present invention, a gap 312 is provided between adjacent battery cells 311 of the battery string 31. A second black background layer 8 is provided on the front side of the solder ribbon 310 located in the gap 312. The front side of the solder ribbon 310 is the surface of the solder ribbon 310 close to the front glass 5. That is, the second black background layer 8 is provided in the gap 312 to cover the front side of the solder ribbon 310. The second black background layer 8 is used in conjunction with the colored adhesive film 4 so that the solder ribbon 310 at the position of the gap 312 also presents a colored effect on the front side of the colored battery assembly 100, reducing the color difference between the color of the solder ribbon 310 on the front side of the colored battery assembly 100 and the color of the battery cells 311 on the front side of the colored battery assembly 100, making the front appearance color of the colored battery assembly 100 more harmonious.

[0031] like Figure 4 As shown, in another embodiment of this utility model, the adjacent battery cells 311 of the battery string 31 can also partially overlap, that is, there is no gap 312 between the adjacent battery cells 311 of the battery string 31. In this case, since there is no gap 312 between the adjacent battery cells 311 of the battery string 31, the front of the colored battery module 100 will not expose the solder ribbons 310 between the battery cells 311, thus avoiding the influence of the solder ribbons 310 on the front color of the colored battery module 100, and making the front appearance color of the colored battery module 100 more harmonious; moreover, there is no need to set a second black background layer 8 on the solder ribbons 310, which can reduce the process flow of the module.

[0032] like Figure 1 and Figure 3As shown in the embodiment of this utility model, the busbar 6 is disposed on the outside of the battery string 31, and a third black background layer 9 is disposed on the front of the busbar 6. The front of the busbar 6 is the surface of the busbar 6 near the front glass 5. By using the third black background layer 9 in combination with the colored adhesive film 4, the busbar 6 presents a colored effect on the front of the colored battery assembly 100, reducing the color difference between the color of the busbar 6 on the front of the colored battery assembly 100 and the color of the battery cell 311 on the front of the colored battery assembly 100, making the front appearance color of the colored battery assembly 100 more harmonious.

[0033] like Figure 4 As shown, in another embodiment of the present utility model, the busbar 6 is located on the back of the battery string 31, or that is, the busbar 6 is hidden on the back of the battery string 31, so as to avoid the influence of the color of the busbar 6 on the front color of the colored battery assembly 100, and can also make the front appearance color of the colored battery assembly 100 more harmonious; moreover, there is no need to set a third black background layer 9 on the busbar 6, which can reduce the process flow of the assembly.

[0034] This embodiment of the present invention provides a colored battery assembly 100. By ensuring that the surface of the battery cell 311 near the colored adhesive film 4 has a visible light reflectance of less than 10%, the surface of the battery cell 311 near the colored adhesive film 4 appears black. Simultaneously, a first black background layer 7 is provided on the surface of the back adhesive film 2 near the battery cell layer 3. This results in a colored effect when the area of ​​the back adhesive film 2 not covered by the battery cell 311 is combined with the colored adhesive film 4. Furthermore, a gap 312 is provided between adjacent battery cells 311 in the battery string 31. A second black background layer 8 is provided on the front side of the solder ribbon 310 located in the gap 312, or the adjacent cells 311 of the battery string 31 partially overlap to avoid color difference between the solder ribbon 310 and the cells 311 on the front side of the colored battery module 100; the busbar 6 is located on the outside of the battery string 31, and a third black background layer 9 is provided on the front side of the busbar 6, or the busbar 6 is located on the back side of the battery string 31 to avoid the busbar 6 being exposed, thus avoiding color difference between the busbar 6 and the cells 311 on the front side of the colored battery module 100. Therefore, the colored battery module 100 of this invention avoids the influence of the colors of the back film 2, solder ribbon 310 and busbar 6 on the front appearance color of the colored battery module 100, and the front appearance color of the colored battery module 100 is consistent, making the front appearance color of the colored battery module 100 more harmonious.

[0035] As an embodiment of the present invention, the back adhesive film 2 is a white adhesive film or a transparent adhesive film, and the first black background layer 7 is a black coating applied to the back adhesive film 2.

[0036] In this embodiment, the back adhesive film 2 is a white or transparent adhesive film. Since transparent or white adhesive films are cheaper, a black coating can be directly applied to the front side of a conventional white or transparent adhesive film to form the first black background layer 7. This method is simple to prepare and has low cost. In other embodiments, the first black background layer 7 can also be a black film layer bonded and fixed to the back adhesive film 2.

[0037] As an embodiment of the present invention, the second black background layer 8 is a black shielding strip provided on the solder strip 310 or a black coating applied to the solder strip 310.

[0038] In this embodiment, the second black background layer 8 can be a black shielding strip set on the solder ribbon 310, or a black coating directly applied to the solder ribbon 310. Since the black shielding strip or black coating covers the solder ribbon 310 at the gap 312, the black shielding strip or black coating, together with the colored adhesive film 4, makes the solder ribbon 310 at the gap 312 also appear colored on the front of the module, making the front appearance color of the colored battery module 100 more harmonious.

[0039] As an embodiment of the present invention, the third black background layer 9 is a black shielding strip provided on the busbar 6 or a black coating applied to the busbar 6.

[0040] In this embodiment, the third black background layer 9 can be a black shielding strip set on the busbar 6, or a black coating directly applied to the busbar 6. Since the black shielding strip or black coating covers the busbar 6, the busbar 6 also appears colored on the front of the colored battery assembly 100, making the front appearance color of the colored battery assembly 100 more harmonious.

[0041] Please refer to Figure 4 As an embodiment of the present invention, the busbar 6 is located on the back of the battery string 31, and an insulating strip 15 is provided between the busbar 6 and the battery cells 311 of the battery string 31.

[0042] In this embodiment, when the busbar 6 is located on the back of the battery string 31, an insulating strip 15 is provided between the busbar 6 and the battery cells 311 of the battery string 31. The insulating strip 15 provides insulation and isolation between the busbar 6 and the battery cells 311 of the battery string 31, preventing the busbar 6 from contacting the grid lines or irregular solder strips on the battery cells 311, and preventing short circuits.

[0043] As one embodiment of this utility model, a gap is provided between adjacent battery strings 31, the busbar 6 is located on the back of the battery string 31, and the front of the busbar 6 located in the gap is set to black; or, there is no gap between adjacent battery strings 31.

[0044] In this embodiment, a gap is provided between adjacent battery strings 31. When the busbar 6 is located on the back of the battery strings 31, a portion of the busbar 6 is located within the gap, and the surface of the busbar 6 within the gap is black. This means the surface of the busbar 6 within the gap is painted black, making the busbar 6 appear colored even in the gap, further enhancing the harmonious color of the front appearance of the colored battery assembly 100. Alternatively, there may be no gap between adjacent battery strings 31, preventing the busbar 6 from being exposed within the gap and avoiding the color of the busbar 6 affecting the front appearance of the colored battery assembly 100, similarly resulting in a more harmonious front appearance.

[0045] Please refer to this again. Figure 3 As an embodiment of the present invention, the busbar 6 is disposed on the outside of the battery string 31, and the battery cell 311 located at the end of the battery string 31 is connected to the busbar 6 by the solder strip 310, and a fourth black background layer 11 is provided on the front side of the solder strip 310 connecting the busbar 6.

[0046] In this embodiment, the busbar 6 is located on the outside of the battery string 31, and is not located on the back of the battery string 31. The battery cells 311 at the ends of the battery string 31 are connected to the busbar 6 via solder ribbons 310. The front of the solder ribbons 310 connecting the busbar 6 is set to black, thus giving the solder ribbons 310 a colored effect on the front of the colored battery assembly 100, further enhancing the color harmony of the front appearance of the colored battery assembly 100. Specifically, the fourth black background layer 11 can be a black coating applied to the solder ribbons 310, or a black shielding strip on the solder ribbons 310. Preferably, the fourth black background layer 11 is only provided in the area of ​​the solder ribbons 310 between the busbar 6 and the edge battery cells 311.

[0047] As an embodiment of this utility model, the thickness of the colored adhesive film 4 is 0.05~1mm, which avoids the colored adhesive film 4 being too thin and causing the color on the front of the module to be indistinct, and avoids the colored adhesive film 4 being too thick and affecting the sunlight transmittance on the front of the module, thus achieving a balance between module color and battery efficiency.

[0048] For example, the thickness of the colored film 4 can be any value among 0.05mm, 0.1mm, 0.2mm, 0.23mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1mm.

[0049] As an embodiment of this utility model, the colored film 4 is a laminate of one or more of the following: EVA layer, POE layer, and PVB layer containing colored components.

[0050] The EVA layer is made of ethylene-vinyl acetate copolymer (EVA), the POE layer is made of polyolefin elastomer (POE), and the PVB layer is made of polyvinyl butyral (PVB). Specifically, the colored film 4 incorporates color components to achieve color change and adjustment, thereby enabling color change and adjustment of the colored solar cell module 100. This effectively allows for free selection and variation of the appearance color of the colored solar cell module 100, enhancing the aesthetics of the photovoltaic module. Furthermore, the color can be adjusted according to user needs, increasing product variety. The color components can be inorganic pigments or organic dyes.

[0051] As an embodiment of the present invention, the second black background layer 8 fills the gap 312 between the sheets, and the second black background layer 8 does not overlap with the front side of the battery sheet 311.

[0052] In this embodiment, the second black background layer 8 is completely located within the gap 312, and the second black background layer 8 does not overlap with the front of the battery cell 311. That is, the second black background layer 8 does not cover the front area of ​​the battery cell 311, thus avoiding the second black background layer 8 from blocking the front of the battery cell 311 and affecting the power generation rate of the battery cell 311.

[0053] In another embodiment of the present invention, the second black background layer 8 partially fills the gap 312 between the sheets, and the second black background layer 8 partially overlaps the front side of the battery sheet 311.

[0054] In this embodiment, a portion of the second black background layer 8 fills the gap 312 between the sheets, and a portion overlaps the front side of the adjacent battery sheet 311 of the second black background layer 8. This can increase the fixing effect of the second black background layer 8, prevent the second black background layer 8 from shifting during the lamination process, and improve the fixing reliability of the second black background layer 8. Please refer to Figure 2-3 As one embodiment of this utility model, it also includes: A UV cutoff film 10 is disposed between the colored adhesive film 4 and the front glass 5. The UV cutoff film 10 has an average transmittance of less than 15% for light with a wavelength range of 250~350 nanometers.

[0055] In this embodiment, a UV cut-off film 10 is provided between the colored adhesive film 4 and the front glass 5. The UV cut-off film 10 has an average transmittance of less than 15% for light with a wavelength range of 250-350 nanometers. By absorbing ultraviolet light, the UV cut-off film 10 prevents excessive ultraviolet light from entering the colored adhesive film 4, which would cause the colored adhesive film 4 to age and fade, thereby improving the color stability of the colored adhesive film 4 and ensuring the color reliability of the colored battery assembly 100. Optionally, the UV cut-off film 10 can effectively prevent excessive ultraviolet light from entering the colored adhesive film 4, preventing the colored adhesive film 4 from aging and fading, and ensuring the long-term stability of the color of the colored adhesive film 4.

[0056] Please refer to Figure 5 As one embodiment of this utility model, it also includes: A barrier layer 13 is disposed between the UV cut-off film 10 and the colored adhesive film 4.

[0057] The melting point of the barrier layer 13 is higher than that of the UV cut-off film and the colored film 4. When the colored battery module 100 encounters hot spot problems during outdoor power generation, causing the local temperature of the module to rise, it is easy to cause cross-diffusion of components in the colored film 4, leading to color aging of the colored film 4. In this embodiment, by setting the barrier layer 13, the barrier layer 13 can prevent the cross-diffusion of UV-blocking components in the UV cut-off film 10 and color components in the colored film 4 during high-temperature processes, thereby preventing color aging of the colored film 4, improving the color stability of the colored film 4, and ensuring the UV cut-off effect of the UV cut-off film 10 on ultraviolet light.

[0058] In one embodiment of this invention, the barrier layer 13 can be a PVB film or an EVA film. The PVB film is made of polyvinyl butyral (PVB).

[0059] In this embodiment, the material used for the barrier layer 13 has a higher melting point than the materials used for the UV cut-off film 10 and the colored adhesive film 4. For example, the barrier layer 13 can be a PVB film, and the UV cut-off film 10 and the colored adhesive film 4 can be POE films. Alternatively, the barrier layer 13 can be an EVA film, and the UV cut-off film 10 and the colored adhesive film 4 can be POE films.

[0060] This invention also provides a photovoltaic system, which includes the color battery module 100 described in the above embodiments. It should be noted that this photovoltaic system has the same or similar beneficial effects as the color battery module 100, and the related aspects between the two can be referred to each other; to avoid repetition, they will not be repeated here.

[0061] In this embodiment, the photovoltaic system can be applied in photovoltaic power plants, such as ground-mounted power plants, rooftop power plants, and floating power plants. It can also be applied to equipment or devices that utilize solar energy to generate electricity, such as user solar power supplies, solar streetlights, solar cars, and solar buildings. Of course, it is understood that the application scenarios of the photovoltaic system are not limited to these; that is, the photovoltaic system can be applied in all fields that require solar energy to generate electricity. Taking a photovoltaic power generation system network as an example, the photovoltaic system may include a photovoltaic array, a combiner box, and an inverter. The photovoltaic array may be an array combination of multiple colored battery modules 100. For example, multiple colored battery modules 100 can form multiple photovoltaic arrays. The photovoltaic array is connected to the combiner box, which can collect the current generated by the photovoltaic array. The collected current flows through the inverter and is converted into AC power required by the mains power grid before being connected to the mains power grid to achieve solar power supply.

[0062] In the description of this specification, references to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A colored battery assembly, characterized in that, It includes a back panel, a back adhesive film, a battery cell layer, and a front glass, which are stacked in sequence. The battery cell layer includes multiple battery strings, which are connected in series and / or in parallel via busbars. Each battery string includes several battery cells connected in series via solder ribbons. The surface of the battery cell near the colored adhesive film has a visible light reflectance of less than 10%. The surface of the back adhesive film near the battery cell layer is provided with a first black background layer. A gap is provided between adjacent cells of the battery string or the adjacent cells of the battery string partially overlap, and a second black background layer is provided on the front side of the solder strip located in the gap; The busbar is located on the back of the battery string, or the busbar is located on the outside of the battery string, and the front of the busbar is provided with a third black background layer.

2. The color battery assembly according to claim 1, characterized in that, The back adhesive film is a white or transparent adhesive film, and the first black background layer is a black coating applied to the back adhesive film.

3. The color battery assembly according to claim 1, characterized in that, The second black background layer is a black masking strip provided on the solder strip or a black coating applied to the solder strip.

4. The color battery assembly according to claim 1, characterized in that, The third black background layer is a black masking strip provided on the busbar or a black coating applied to the busbar.

5. The color battery assembly according to claim 1, characterized in that, The busbar is located on the back of the battery string, and an insulating strip is provided between the busbar and the battery cells of the battery string.

6. The color battery assembly according to claim 1, characterized in that, A gap is provided between adjacent battery strings, the busbar is located on the back of the battery string, and the front of the busbar located in the gap is set to black; or, there is no gap between adjacent battery strings.

7. The color battery assembly according to claim 1, characterized in that, The busbar is located on the outside of the battery string, and the battery cells located at the end of the battery string are connected to the busbar through the solder strip. The front side of the solder strip connecting the busbar is provided with a fourth black background layer.

8. The color battery assembly according to claim 1, characterized in that, The thickness of the colored adhesive film is 0.05~1mm.

9. The color battery assembly according to claim 1, characterized in that, The second black background layer fills the gaps between the cells and does not overlap with the front side of the cell.

10. The color battery assembly according to claim 1, characterized in that, The second black background layer partially fills the gap between the sheets, and the second black background layer partially overlaps the front side of the battery sheet.

11. The color battery assembly according to claim 1, characterized in that, Also includes: A UV cut-off film is disposed between the colored adhesive film and the front glass. The UV cut-off film has an average transmittance of less than 15% for light with a wavelength range of 250 to 350 nanometers.

12. A photovoltaic system, characterized in that, Includes the color battery assembly as described in any one of claims 1 to 11.

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