Double-sided colored battery piece and photovoltaic module

Abstract

The invention relates to a double-sided colored battery piece and a photovoltaic module. The double-sided color battery piece comprises a first printing layer, a first anti-reflection layer, a silicon wafer, a second anti-reflection layer and a second printing layer which are sequentially stacked from the first side to the second side. The silicon wafer comprises a first texturing layer and a second texturing layer which are opposite to each other; the first anti-reflection layer is laminated on the first texturing layer; the second texturing layer is stacked on the second anti-reflection layer; the difference value between the thickness of the first anti-reflection layer and the thickness of the second anti-reflection layer is larger than 30 nm, and the difference value between the reflectivity of the first side face of the double-sided colored battery piece and the reflectivity of the second side face of the double-sided colored battery piece is larger than 2%, so that the first side face of the double-sided colored battery piece is in a first color, and the two side faces of the double-sided colored battery piece are in a second color. The area of the first printing layer is different from that of the second printing layer. The colors presented on the two sides of the double-sided colored battery piece are different, the appearance requirements of different colors of the solar battery piece can be met, and compensation of the power generation efficiency of the colored solar battery piece is achieved.

Description

Technical Field

[0001] The present disclosure relates to the field of photovoltaic technology, and in particular to double-sided color cells and photovoltaic modules. Background Art

[0002] Photovoltaic power generation is one of the main ways to utilize solar energy. Due to its clean, safe, convenient and efficient characteristics, solar photovoltaic power generation has become an emerging industry that has attracted widespread attention and focused development in countries around the world. Therefore, in-depth research and utilization of solar energy resources are of great significance to alleviating resource crises and improving the ecological environment.

[0003] At present, solar cells are dark blue and have a relatively single color. With the continuous progress of the photovoltaic industry, the market has put forward higher performance requirements for photovoltaic products. Not only must the power generation efficiency be continuously improved, but also the cells must have various colors to meet various requirements for appearance. In the prior art, colored solar cells are made by adding a layer of color filter film on the finished cell to make the cell display color. However, the color filter film reduces the amount of light on the solar cell and reduces the power generation efficiency of the photovoltaic cell. Therefore, there is a contradiction between the color of the cell and the power generation efficiency of the cell. Summary of the invention

[0004] Based on this, in order to solve the contradiction between the color change of photovoltaic modules and the power generation efficiency of photovoltaic modules, it is necessary to provide a double-sided color cell and photovoltaic module.

[0005] The disclosed embodiment provides a double-sided color cell, which includes a first printing layer, a first anti-reflection layer, a silicon wafer, a second anti-reflection layer and a second printing layer stacked in sequence from the first side to the second side; the silicon wafer includes a first velvet layer and a second velvet layer opposite to each other; the first anti-reflection layer is stacked on the first velvet layer; the second velvet layer is stacked on the second anti-reflection layer; wherein the difference between the thickness of the first anti-reflection layer and the thickness of the second anti-reflection layer is greater than 30nm, and the difference between the reflectivity of the first side of the double-sided color cell and the reflectivity of the second side of the double-sided color cell is greater than 2%, so that the first side of the double-sided color cell presents a first color, and the second side of the double-sided color cell presents a second color. The area of ​​the first printing layer is different from the area of ​​the second printing layer.

[0006] The double-sided color cell provided in the embodiment of the present disclosure has undergone a process of double-sided texturing, double-sided anti-reflection film coating and double-sided printing on the silicon wafer. The first texturing layer and the second texturing layer enhance the light absorption capacity on both sides of the silicon wafer. The first anti-reflection layer and the second anti-reflection layer can reduce the reflectivity on both sides of the silicon wafer to improve the light absorption capacity and thus improve the power generation efficiency of the cell. Since the difference between the thickness of the first anti-reflection layer and the thickness of the second anti-reflection layer is greater than 30nm, the difference between the reflectivity of the first side of the double-sided color cell and the reflectivity of the second side of the double-sided color cell is greater than 2%, so that the colors presented on both sides of the silicon wafer are different, which can meet the appearance requirements of solar cells with different colors. Since the double-sided color cell increases the light transmittance on both sides, it meets the appearance requirements of the cell with different colors while achieving compensation for the power generation efficiency of the double-sided color cell.

[0007] In some of the embodiments, the ratio of the area of ​​the first printing layer to the area of ​​the second printing layer ranges from 0.4 to 2.5.

[0008] Such an arrangement can increase the difference in the appearance shapes of the two sides of the double-sided color battery cell and improve the uniformity of the double-sided power generation efficiency.

[0009] An embodiment of the present disclosure provides a photovoltaic module, which includes front glass, front film, back glass, back film and a plurality of the above-mentioned double-sided color cells, wherein the plurality of double-sided color cells are arranged at intervals to form a cell array, and the front glass, front film, cell array, back film and back glass are stacked in sequence.

[0010] In this arrangement, since the colors on both sides of the double-sided color cell are different, the spacing and arrangement of multiple double-sided color cells are different, so that the formed cell arrays are different, and the color diversity of the photovoltaic module is improved. The front film, front glass, back film and back glass can also change or increase the appearance of the photovoltaic module, and further balance the differences in the power generation efficiency of multiple double-sided color cells.

[0011] In some embodiments, the plurality of double-sided color cells include a first cell and a second cell. The first cell is configured such that a first printing layer is connected to a front adhesive film, and the second cell is configured such that a second printing layer is connected to the front adhesive film.

[0012] With such an arrangement, the first color and the second color are simultaneously present on the front side of the cell array through the same double-sided color cell, thereby achieving optimization of the photovoltaic module.

[0013] In some embodiments, the first battery cells and the second battery cells are arranged alternately along a first direction, and the first battery cells and the second battery cells are arranged alternately along a second direction, and the first direction is perpendicular to the second direction; wherein the difference in power generation efficiency between two sides of the first battery cell is less than 5%, the power generation efficiency of the first side surface of the second battery cell is the same as the power generation efficiency of the first side surface of the first battery cell, and the power generation efficiency of the second side surface of the second battery cell is the same as the power generation efficiency of the second side surface of the first battery cell.

[0014] Such a setting facilitates the electrode connection between the cells on the front of the photovoltaic module. The power generation efficiency is less than 5%, which makes the power generation efficiency on both sides of the double-sided color cell close, improves the power generation uniformity of the photovoltaic array in the photovoltaic module, and makes the appearance of the photovoltaic module more prominent.

[0015] In some of the embodiments, along a first direction, the first battery cells are arranged sequentially or the second battery cells are arranged sequentially; along a second direction, the first battery cells and the second battery cells are arranged alternately and connected to the front adhesive film, and the first direction is perpendicular to the second direction; wherein, the difference in power generation efficiency between two sides of the first battery cell is less than 5%, the power generation efficiency of the first side of the second battery cell is the same as the power generation efficiency of the first side of the first battery cell, and the power generation efficiency of the second side of the second battery cell is the same as the power generation efficiency of the second side of the first battery cell.

[0016] Such an arrangement ensures the consistency of the power generation efficiency of multiple cells in the first direction of the cell array, and at the same time makes the power generation efficiency of multiple cells in the second direction close, thereby ensuring the uniformity of power generation of the photovoltaic array in the photovoltaic module and the overall appearance of the photovoltaic module with diverse colors and neat arrangement.

[0017] In some of the embodiments, the photovoltaic module also includes a color layer, which is located between the cell array and the front glass, and the color layer includes a plurality of first color blocks arranged at intervals along the front glass; the power generation efficiency of the first side of the first cell is greater than the power generation efficiency of the second side of the second cell, and the first cell corresponds to the first color block.

[0018] The provision of the color layer can further balance the difference in power generation efficiency between the first battery cell and the second battery cell, improve the uniformity of power generation efficiency among the plurality of battery cells, and further enhance the appearance effect.

[0019] In some of the embodiments, the color layer also includes a plurality of second color blocks arranged at intervals along the front glass, the first color block and the second color block have different colors, and the second color block corresponds to the second battery cell to reduce the difference in power generation efficiency between the first battery cell and the second battery cell.

[0020] In this way, the first color block and the second color block have different colors and correspond to the first battery cell and the second battery cell respectively. Without changing the colors of both sides of the same double-sided color battery cell, the photovoltaic module can achieve more combination color effects through the setting of different color blocks.

[0021] In some of the embodiments, the plurality of double-sided color cells include a third cell and a fourth cell, the third cell and the fourth cell are both configured as a first printed layer connected to a front adhesive film, the color of the first side of the third cell is the same as the color of the first side of the fourth cell, and the power generation efficiency of the first side of the third cell is different from the power generation efficiency of the first side of the fourth cell;

[0022] The photovoltaic module also includes a color layer, which is located between the battery cell array and the front glass. The color layer includes a plurality of third color blocks and a plurality of fourth color blocks arranged at intervals along the front glass. The colors of the third color blocks are different from those of the fourth color blocks. The third battery cell and the fourth battery cell correspond to the third color block and the fourth color block, respectively.

[0023] With this arrangement, the third cell and the fourth cell have the same appearance in the cell array but have large differences in power generation. The third color block and the fourth color block can further balance the power generation efficiency of the third cell and the fourth cell and achieve a colorful appearance of the photovoltaic module.

[0024] In some embodiments, the plurality of double-sided color cells further include a fifth cell and a sixth cell, the color of the first side of the fifth cell is different from the color of the first side of the sixth cell, and the first printed layers of some of the fifth cells, the second printed layers of other fifth cells, and the first printed layers of the sixth cell are connected to the front adhesive film;

[0025] The photovoltaic module also includes a color layer, which is located between the cell array and the front glass. The color layer includes three different color blocks arranged at intervals along the front glass. The three different color blocks correspond to some fifth cells, other fifth cells and the sixth cell respectively.

[0026] With such an arrangement, there are cells with different power generation efficiencies on the cell array and a combination of multiple colors is formed. The color blocks of different colors in the color layer are used to balance the power generation efficiency of multiple cells, thereby improving the uniformity of the overall power generation efficiency of the photovoltaic module and greatly enriching the expression ability of the appearance color of the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a double-sided color battery cell in an embodiment of the present disclosure;

[0028] Figure 2is a schematic top view of a double-sided color battery cell in an embodiment of the present disclosure;

[0029] Figure 3 It is a bottom view schematic diagram of a double-sided color battery cell in an embodiment of the present disclosure;

[0030] Figure 4 A color diagram of the first side of a double-sided color battery sheet in an embodiment of the present disclosure;

[0031] Figure 5 A color diagram of the second side of the double-sided color battery sheet in the embodiment of the present disclosure;

[0032] Figure 6 is a schematic diagram of the structure of a photovoltaic assembly in an embodiment of the present disclosure;

[0033] Figure 7 is a top view of the front side of the battery cell array in the embodiment of the present disclosure;

[0034] Figure 8 is a top view of the front side of the battery cell array in the embodiment of the present disclosure;

[0035] Fig. 9 is a top view of the front side of the color layer in the embodiment of the present disclosure;

[0036] Fig.10 is a top view of the front side of the color layer in the embodiment of the present disclosure;

[0037] Fig.11 is a top view of the front side of the battery cell array in the embodiment of the present disclosure;

[0038] Fig.12 It is a top view of the front side of the battery cell array arrangement and the color layer arrangement in the embodiment of the present disclosure.

[0039] Reference numerals:

[0040] 1000, photovoltaic module; 100, battery cell array; 10, double-sided color battery cell; 11, first printed layer; 12, first anti-reflection layer; 13, silicon wafer; 131, first velvet layer; 132, second velvet layer; 14, second anti-reflection layer; 15, second printed layer; 101, first side; 102, second side; 1, first battery cell; 2, second battery cell; 3, third battery cell; 4, fourth battery cell; 5, fifth battery cell; 6, sixth battery cell; 200, front glass; 300, front adhesive film; 400, back adhesive film; 500, back glass; 600, color layer; 601, first color block; 602, second color block. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present disclosure more obvious and understandable, the specific implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present disclosure. However, the embodiments of the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the embodiments of the present disclosure, so the embodiments of the present disclosure are not limited by the specific embodiments disclosed below.

[0042] In the description of the embodiments of the present disclosure, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "perpendicular", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present disclosure.

[0043] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. Exemplarily, the first printed layer may also be referred to as the second printed layer, and the second printed layer may also be referred to as the first printed layer. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the embodiments of the present disclosure, unless otherwise clearly specified and limited, the terms "connected", "connection" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a flexible connection, or a rigid connection in at least one direction; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or a direct connection with the presence of an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly limited. The terms "install", "set", "fixed" and the like can be broadly understood as connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to the specific circumstances.

[0046] refer to Figure 1 , Figure 1 The schematic structure of a double-sided color cell 10 is shown. The present disclosure relates to the field of photovoltaic technology.

[0047] Combination Figure 2 The embodiment of the present disclosure provides a double-sided color cell 10, which includes a first printed layer 11, a first anti-reflection layer 12, a silicon wafer 13, a second anti-reflection layer 14, and a second printed layer 15 stacked in sequence from the first side to the second side. The silicon wafer 13 includes a first velvet layer 131 and a second velvet layer 132 opposite to each other, the first anti-reflection layer 12 is stacked on the first velvet layer 131; the second velvet layer 132 is stacked on the second anti-reflection layer 14. Exemplarily, the first printed layer 11 is a positive electrode, and the second printed layer 15 is a negative electrode.

[0048] The difference between the thickness of the first anti-reflection layer 12 and the thickness of the second anti-reflection layer 14 is greater than 30 nm, and the difference between the reflectivity of the first side 101 of the double-sided color cell 10 and the reflectivity of the second side 102 of the double-sided color cell 10 is greater than 2%, so that the first side 101 of the double-sided color cell 10 presents a first color, and the second side 102 of the double-sided color cell 10 presents a second color. The area of ​​the first printed layer 11 is different from the area of ​​the second printed layer 15.

[0049] The double-sided color cell 10 provided in the embodiment of the present disclosure is a process flow in which the silicon wafer 13 is subjected to double-sided texturing, double-sided anti-reflection film coating, and double-sided printing. The first texturing layer 131 and the second texturing layer 132 increase the surface roughness of the two sides of the silicon wafer 13 and enhance the light absorption capacity of the two sides of the silicon wafer 13; the first anti-reflection layer 12 and the second anti-reflection layer 14 can reduce the reflectivity of the two sides of the silicon wafer 13 to improve the light absorption capacity and thus improve the power generation efficiency of the cell. Since the difference between the thickness of the first anti-reflection layer 12 and the thickness of the second anti-reflection layer 14 is greater than 30nm, the difference between the reflectivity of the first side 101 of the double-sided color cell 10 and the reflectivity of the second side 102 of the double-sided color cell 10 is greater than 2%, so that the two sides of the silicon wafer 13 present different colors.

[0050] The double-sided color solar cell 10 provided in the embodiment of the present disclosure not only meets the appearance requirements of solar cells of different colors, but also can generate electricity on both sides of the silicon wafer 13, thereby achieving compensation of the power generation efficiency of the color solar cell.

[0051] refer to Figure 1 , illustratively, the first side 101 of the double-sided color cell 10 is on the upper side, and the second side 102 of the double-sided color cell 10 is on the lower side.

[0052] For example, the reflectivity of the first side 101 of the double-sided color cell 10 is 2% greater than the reflectivity of the second side 102 of the double-sided color cell 10, the thickness of the first anti-reflection layer 12 is 30 nm greater than the thickness of the second anti-reflection layer 14, or the thickness of the second anti-reflection layer 14 is 30 nm greater than the thickness of the first anti-reflection layer 12. At this time, the colors of the two sides of the double-sided color cell 10 are different.

[0053] Exemplarily, the reflectivity of the second side 102 of the double-sided color cell 10 is 2% greater than the reflectivity of the first side 101 of the double-sided color cell 10. Regardless of whether the thickness of the first anti-reflection layer 12 is 30 nm greater than the thickness of the second anti-reflection layer 14, or the thickness of the second anti-reflection layer 14 is 30 nm greater than the thickness of the first anti-reflection layer 12, the colors of the two sides of the double-sided color cell 10 are different.

[0054] For example, the thickness and material of the first anti-reflection layer 12 and the second anti-reflection layer 14 may be different. The materials of the first anti-reflection layer 12 and the second anti-reflection layer 14 may be silicon oxide, oxide rate, silicon nitride, silicon oxynitride or other materials; the different thicknesses of the first anti-reflection layer 12 and the second anti-reflection layer 14 affect the colors of the first color and the second color, and the combination of the two improves the appearance effect of the double-sided color solar cell 10 and the uniformity of the double-sided power generation efficiency.

[0055] refer to Figure 2 and Figure 3In some embodiments, the ratio of the area of ​​the first printed layer 11 to the area of ​​the second printed layer 15 ranges from 0.4 to 2.5. In this way, the difference in the appearance of the double-sided color battery cell 10 can be increased, and the uniformity of the double-sided power generation efficiency can be improved. For example, the ratio of the area of ​​the first printed layer 11 to the area of ​​the second printed layer 15 can be 0.5, 1.5, 2.0 or 2.5. Exemplarily, the first printed layer 11 and the second printed layer 15 are both composed of horizontal grid lines and vertical grid lines.

[0056] Exemplarily, the patterns of the first printed layer 11 and the second printed layer 15 are different. For example, the area of ​​the first printed layer 11 is larger than the area of ​​the second printed layer 15, which reduces the power generation efficiency of the first side 101 of the double-sided color cell 10 and improves the power generation efficiency of the second side 102 of the double-sided color cell 10, so that the difference in power generation efficiency on both sides of the double-sided color cell 10 is reduced, and the uniformity of the double-sided power generation efficiency is improved.

[0057] Exemplarily, the first printed layer 11 and the second printed layer 15 are made of different materials, and the power generation efficiency of the second side 102 of the double-sided color solar cell 10 can be improved by using better / more expensive electrode materials.

[0058] refer to Figure 4 and Figure 5 , exemplarily, the double-sided color cell 10 is an N-type TOPCon cell, and the white lines in the figure are silver grid lines, namely the first printed layer 11 or the second printed layer 15. The thickness of the first anti-reflection layer 12 is 170nm, and its appearance color is orange-yellow; the thickness of the second anti-reflection layer 14 is 80nm, and its appearance color is blue. The reflectivity of the first side 101 of the double-sided color cell 10 is 10%, and the reflectivity of the second side 102 of the double-sided color cell 10 is 3%. The first printed layer 11 prints four horizontal grid lines, and the second printed layer 15 prints two horizontal grid lines, so that the coverage area of ​​the first printed layer 11 is much larger than the coverage area of ​​the second printed layer 15, and the light-transmitting area of ​​the second side 102 of the double-sided color cell 10 is larger than the light-transmitting area of ​​the first side 101 of the double-sided color cell 10, and the power generation efficiency of the first side 101 of the double-sided color cell 10 is 22%, and the power generation efficiency of the second side 102 of the double-sided color cell 10 is 21%.

[0059] refer to Figure 6 The embodiment of the present disclosure provides a photovoltaic module 1000, which includes a front glass 200, a front adhesive film 300, a back glass 500, a back adhesive film 400 and a plurality of the above-mentioned double-sided color cells 10, wherein the plurality of double-sided color cells 10 are arranged at intervals to form a cell array 100, and the front glass 200, the front adhesive film 300, the cell array 100, the back adhesive film 400 and the back glass 500 are stacked in sequence.

[0060] In this arrangement, since the colors of the two sides of the double-sided color cell 10 are different, the spacing arrangement of the multiple double-sided color cells 10 is different, so that the formed cell arrays 100 are different, and the color diversity of the photovoltaic module 1000 is improved. The front adhesive film 300, the front glass 200, the back adhesive film 400 and the back glass 500 can also change or increase the appearance effect of the photovoltaic module 1000, and further balance the differences in the power generation efficiency of the multiple double-sided color cells 10.

[0061] refer to Figure 6 For example, the front glass 200 is located at the top, the back glass 500 is located at the bottom, the cell array 100 is located on the upper side of the back film 400, and one side of the front glass 200 is the front of the cell array 100 and the photovoltaic module 1000.

[0062] For example, the front adhesive film 300 may be colorless and transparent. Or the front adhesive film 300 may be a transparent film with different colors to enhance the appearance effect and further improve the uniformity of the power generation efficiency of multiple double-sided surfaces. For example, the front adhesive film 300 is made of PET material.

[0063] There is no restriction on the arrangement of the multiple double-sided color cells 10 of the cell array 100. The positive electrodes of two adjacent double-sided color cells 10 are connected to the negative electrodes, that is, the first printed layer 11 is connected to the second printed layer 15. Finally, all the double-sided color cells 10 are connected in series in sequence to form a complete cell array 100.

[0064] refer to Figure 7 and Figure 8 In some embodiments, the plurality of double-sided color cells 10 include a first cell 1 and a second cell 2, the first cell 1 is configured as a first printed layer 11 connected to a front adhesive film 300, and the second cell 2 is configured as a second printed layer 15 connected to a front adhesive film 300. That is, the first side 101 of the first cell 1 is arranged toward the front, and the second side 102 of the second cell 2 is arranged toward the front. In this way, the first color and the second color are simultaneously present on the front of the cell array 100 through the same double-sided color cell 10, thereby optimizing the photovoltaic module 1000.

[0065] Exemplarily, the first side 101 of the first cell 1 is yellow in appearance, and the second side 102 of the second cell 2 is blue in appearance; therefore, the front of the photovoltaic module 1000 includes a plurality of yellow first cells 1 and a plurality of blue second cells 2 arranged in an array. In other embodiments, the first cell 1 and the second cell 2 may also have other colors on both sides.

[0066] refer to Figure 7In some embodiments, along the first direction, the first cell 1 and the second cell 2 are arranged alternately, and along the second direction, the first cell 1 and the second cell 2 are arranged alternately, and the first direction is perpendicular to the second direction; wherein, the difference in power generation efficiency between the two sides of the first cell 1 is less than 5%, the power generation efficiency of the first side 101 of the second cell 2 is the same as the power generation efficiency of the first side 101 of the first cell 1, and the power generation efficiency of the second side 102 of the second cell 2 is the same as the power generation efficiency of the second side 102 of the first cell 1. Such a configuration facilitates the electrode connection between the cells on the front side of the photovoltaic module 1000, and the power generation efficiency is less than 5%, so that the double-sided power generation efficiency of the double-sided color cell 10 is close, which improves the power generation uniformity of the photovoltaic array in the photovoltaic module 1000, and makes the appearance of the photovoltaic module 1000 more prominent.

[0067] Exemplarily, the first cell 1 and the second cell 2 are the same type of cells. The power generation efficiency of the first side 101 of the first cell 1 is 22%, and the power generation efficiency of the second side 102 of the second cell 2 is 21%. The first direction in the figure is the left-right direction, and the second direction is the up-down direction. The cell array 100 is arranged in such a way that the first cell 1 and the second cell 2 are arranged alternately from left to right, and the first cell 1 and the second cell 2 are arranged alternately from top to bottom. The transparent front adhesive film 300 is stacked on the cell array 100, and the transparent front glass 200 is stacked on the transparent adhesive film. The first printed layer 11 of the first cell 1 is connected to the second printed layer 15 of the second cell 2 through a welding strip, and the welding strips are all connected to the front adhesive film 300, which facilitates the series connection between multiple cells, ensures the uniformity of the power generation efficiency of the photovoltaic module 1000, and makes the alternation of the two colors of the front appearance of the photovoltaic module 1000 have an impact.

[0068] refer to Figure 8 In some embodiments, along the first direction, the first cell 1 and the second cell 2 are arranged alternately, and along the second direction, the first cell 1 and the second cell 2 are arranged alternately, and the first direction is perpendicular to the second direction; wherein, the difference in power generation efficiency between the two sides of the first cell 1 is less than 5%, the power generation efficiency of the first side 101 of the second cell 2 is the same as the power generation efficiency of the first side 101 of the first cell 1, and the power generation efficiency of the second side 102 of the second cell 2 is the same as the power generation efficiency of the second side 102 of the first cell 1. Such a configuration facilitates the electrode connection between the cells on the front side of the photovoltaic module 1000, and the power generation efficiency is less than 5%, so that the double-sided power generation efficiency of the double-sided color cell 10 is close, which improves the power generation uniformity of the photovoltaic array in the photovoltaic module 1000, and makes the appearance of the photovoltaic module 1000 more prominent.

[0069] Exemplarily, the first cell 1 and the second cell 2 are the same cell. The power generation efficiency of the first side 101 of the first cell 1 is 22%, and the power generation efficiency of the second side 102 of the second cell 2 is 21%. The arrangement of the cell array 100 is that multiple first cells 1 are arranged alternately from left to right, and the first cells 1 and the second cells 2 are arranged alternately from top to bottom. This cell array 100 makes the two colors on the front of the photovoltaic module 1000 arranged regularly, achieving a better appearance effect.

[0070] In other embodiments, the first battery cell 1 and the second battery cell 2 are the same battery cell. The plurality of first battery cells 1 in the battery cell array 100 surround the plurality of second battery cells 2, and the plurality of second battery cells 2 form graphics or logos of different shapes for highlighting.

[0071] In other embodiments, the difference between the power generation efficiency of the first side 101 of the first cell 1 and the power generation efficiency of the second side 102 of the second cell 2 may be 2%, 3% or 4%, and the color of the first side 101 of the first cell 1 is different from the color of the second side 102 of the second cell 2. The first cell 1 and the second cell 2 may be arranged in a variety of ways, and the photovoltaic module 1000 may have a variety of different appearance effects.

[0072] refer to Fig. 9 In some embodiments, the photovoltaic module 1000 further includes a color layer 600, the color layer 600 is located between the cell array 100 and the front glass 200, the color layer 600 includes a plurality of first color blocks 601 arranged at intervals along the front glass 200, the power generation efficiency of the first side surface 101 of the first cell 1 is greater than the power generation efficiency of the second side surface 102 of the second cell 2, and the first cell 1 corresponds to the first color block 601. The provision of the color layer 600 can further balance the difference in power generation efficiency between the first cell 1 and the second cell 2, improve the uniformity of power generation efficiency between the plurality of cells, and further enhance the appearance effect.

[0073] Exemplarily, the first cell 1 and the second cell 2 are the same type of cells. The power generation efficiency of the first side 101 of the first cell 1 is 22%, and the power generation efficiency of the second side 102 of the second cell 2 is 21%. The first color block 601 is light yellow and corresponds to the first cell 1, so that the power generation efficiency of the first side 101 of the first cell 1 is reduced, further improving the uniformity of the power generation efficiency of the photovoltaic module 1000. At the same time, because the uniformity of the color layer 600 is high, the appearance color uniformity of the photovoltaic module 1000 is improved. In other embodiments, different colors of the double-sided color cells 10 can be set, and different colors of the first color blocks 601 can be set at the same time, so that the color effect of the photovoltaic module 1000 is more colorful.

[0074] Exemplarily, the color layer 600 is coated on the front glass 200 and is located between the front glass 200 and the front adhesive film 300. For example, the material of the color layer 600 is a transparent color film of PET material.

[0075] refer to Fig.10 In some embodiments, the color layer 600 further includes a plurality of second color blocks 602 arranged at intervals along the front glass 200, the first color block 601 and the second color block 602 have different colors, and the second color block 602 corresponds to the second battery cell 2 so as to reduce the difference in power generation efficiency between the first battery cell 1 and the second battery cell 2. In this way, the first color block 601 and the second color block 602 have different colors and correspond to the first battery cell 1 and the second battery cell 2 respectively. On the basis of not changing the colors of both sides of the same double-sided color battery cell 10, the photovoltaic module 1000 can achieve more combination color effects through the arrangement of different color blocks.

[0076] Exemplarily, the first cell 1 and the second cell 2 are the same cell. The first color block 601 is dark yellow and corresponds to the first cell 1, and the second color block 602 is light yellow and corresponds to the second cell 2, so that the power generation efficiency of the first side 101 of the first cell 1 is close to the power generation efficiency of the second side 102 of the second cell 2, and at the same time, the color of the outer surface of the photovoltaic module 1000 corresponding to the two is changed, so that the color effect of the photovoltaic module 1000 is more colorful. In other embodiments, the colors of the first color block 601 and the second color block 602 are different, and one of the color blocks with reduced power generation efficiency corresponds to the cell with high power generation efficiency for balancing the power generation efficiency.

[0077] refer to Fig.10 and Fig.11In some embodiments, the plurality of double-sided color cells 10 include a third cell 3 and a fourth cell 4, the third cell 3 and the fourth cell 4 are different types of cells, the third cell 3 and the fourth cell 4 are both configured as a first printed layer 11 connected to a front adhesive film 300, the color of the first side 101 of the third cell 3 is the same as the color of the first side 101 of the fourth cell 4, and the power generation efficiency of the first side 101 of the third cell 3 is different from the power generation efficiency of the first side 101 of the fourth cell 4. The photovoltaic module 1000 also includes a color layer 600, the color layer 600 is located between the cell array 100 and the front glass 200, the color layer 600 includes a plurality of third color blocks and a plurality of fourth color blocks arranged at intervals along the front glass 200, and the colors of the third color blocks and the fourth color blocks are different; the third cell 3 and the fourth cell 4 correspond to the third color block and the fourth color block, respectively. With this arrangement, the third cell 3 and the fourth cell 4 have the same appearance in the cell array 100 but have greatly different power generation. The third color block and the fourth color block can further balance the power generation efficiency of the third cell 3 and the fourth cell 4 and achieve a colorful appearance of the photovoltaic module 1000.

[0078] refer to Fig.10 and Fig.11 , illustratively, Figure 7 The power generation efficiency of the first side 101 of the third battery cell 3 is 24% and the color is blue, the power generation efficiency of the first side 101 of the fourth battery cell 4 is 25% and the color is also blue, the third battery cell 3 is located in the left column, and the fourth battery cell 4 is located in the right column; the third color block is the same as the first color block 601, which is light yellow, and the fourth color block is the same as the second color block 602, which is dark yellow. Figure 8 The color layer 600 is stacked on top of Figure 7 On the upper side, the third color block is stacked on the third battery cell 3 in the left column, and the fourth color block is stacked on the fourth battery cell 4 in the right column, forming a photovoltaic module 1000 with different appearance colors and uniform power generation efficiency. In other embodiments, the third battery cell 3 and the fourth battery cell 4 can also be other colors, and the third color block and the fourth color block can also be other colors of different shades or different colors.

[0079] refer to Fig.12In some embodiments, the plurality of double-sided color cells 10 further include a fifth cell 5 and a sixth cell 6, the color of the first side 101 of the fifth cell 5 is different from the color of the first side 101 of the sixth cell 6, the first printed layers 11 of some of the fifth cells 5, the second printed layers 15 of other fifth cells 5, and the first printed layers 11 of the sixth cell 6 are connected to the front adhesive film 300; the photovoltaic module 1000 further includes a color layer 600, the color layer 600 is located between the cell array 100 and the front glass 200, and the color layer 600 includes three color blocks of different colors arranged at intervals along the front glass 200, and the three color blocks of different colors correspond to some fifth cells 5, other fifth cells 5, and the sixth cell 6. In this way, there are cells with different power generation efficiencies on the cell array 100 and a combination effect of multiple colors is formed, and the color blocks of different colors in the color layer 600 are used to balance the power generation efficiency of multiple cells, thereby improving the uniformity of the overall power generation efficiency of the photovoltaic module 1000, and greatly enriching the performance of the appearance color of the photovoltaic module 1000.

[0080] refer to Fig.12 , exemplarily, the left side of the figure is the cell array 100, the first anti-reflection layer 12 of the fifth cell 5 has a thickness of 170nm, and the appearance color is orange; the second anti-reflection layer 14 of the fifth cell 5 has a thickness of 75nm, and the appearance color is dark blue; the first anti-reflection layer 12 of the sixth cell 6 has a thickness of 90nm, and the appearance color is light blue; the right side of the figure is the color layer 600, and the three color blocks of the color layer 600 correspond to the fifth color block, the sixth color block and the seventh color block respectively. The color layer 600 on the right side is stacked on the cell array 100 on the left side, so that different color blocks match the power generation efficiency of cells of different colors, thereby improving the uniformity of the power generation efficiency of the photovoltaic module 1000.

[0081] Exemplarily, it also includes a seventh cell, an eighth cell, etc., of different colors and different power generation efficiencies. There is no restriction on the arrangement of the cell array 100, and there is no restriction on the color of the color block. Photovoltaic modules 1000 of more colors can be combined while ensuring the uniformity of the power generation efficiency of the photovoltaic modules, which greatly enriches the building's ability to express the appearance color of the photovoltaic modules 1000.

[0082] The technical features of the embodiments disclosed above can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the embodiments described above are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] In the embodiments disclosed above, unless otherwise clearly specified and limited, the execution order of each step is not limited, for example, it can be executed in parallel, or it can be executed successively in different orders. The sub-steps of each step can also be executed alternately. The above-mentioned various forms of processes can be used, and steps can be reordered, added or deleted, as long as the desired results of the technical solution provided in the embodiment of the present disclosure can be achieved, and this document does not limit it here.

[0084] The embodiments disclosed above only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. Double-sided color battery cell, characterized in that: It includes a first printing layer, a first anti-reflection layer, a silicon wafer, a second anti-reflection layer and a second printing layer stacked in sequence from the first side to the second side; The silicon wafer comprises a first velvet layer and a second velvet layer opposite to each other, the first anti-reflection layer is stacked on the first velvet layer; the second velvet layer is stacked on the second anti-reflection layer; The difference between the thickness of the first anti-reflection layer and the thickness of the second anti-reflection layer is greater than 30 nm, and the difference between the reflectivity of the first side of the double-sided color cell and the reflectivity of the second side of the double-sided color cell is greater than 2%, so that the first side of the double-sided color cell presents a first color, and the second side of the double-sided color cell presents a second color; An area of ​​the first printing layer is different from an area of ​​the second printing layer.

2. The double-sided color cell according to claim 1, characterized in that: The ratio of the area of ​​the first printing layer to the area of ​​the second printing layer ranges from 0.4 to 2.

5.

3. A photovoltaic module, characterized in that It comprises front glass, front adhesive film, back glass, back adhesive film and a plurality of double-sided color cells as claimed in claim 1 or 2, wherein the plurality of double-sided color cells are arranged at intervals to form a cell array, and the front glass, the front adhesive film, the cell array, the back adhesive film and the back glass are stacked in sequence.

4. The photovoltaic module according to claim 3, characterized in that: The plurality of double-sided color cells include a first cell and a second cell. The first cell is configured such that the first printing layer is connected to the front adhesive film, and the second cell is configured such that the second printing layer is connected to the front adhesive film.

5. The photovoltaic module according to claim 4, characterized in that: Along a first direction, the first battery cells and the second battery cells are arranged alternately, and along a second direction, the first battery cells and the second battery cells are arranged alternately, and the first direction is perpendicular to the second direction; Among them, the difference in power generation efficiency between the two sides of the first battery cell is less than 5%, the power generation efficiency of the first side of the second battery cell is the same as the power generation efficiency of the first side of the first battery cell, and the power generation efficiency of the second side of the second battery cell is the same as the power generation efficiency of the second side of the first battery cell.

6. The photovoltaic module according to claim 4, characterized in that: Along a first direction, the first battery cells are arranged in sequence or the second battery cells are arranged in sequence; along a second direction, the first battery cells and the second battery cells are arranged alternately and connected to the front adhesive film, and the first direction is perpendicular to the second direction; Among them, the difference in power generation efficiency between the two sides of the first battery cell is less than 5%, the power generation efficiency of the first side of the second battery cell is the same as the power generation efficiency of the first side of the first battery cell, and the power generation efficiency of the second side of the second battery cell is the same as the power generation efficiency of the second side of the first battery cell.

7. The photovoltaic module according to claim 5 or 6, characterized in that: The photovoltaic module further comprises a color layer, the color layer is located between the cell array and the front glass, and the color layer comprises a plurality of first color blocks arranged at intervals along the front glass; The power generation efficiency of the first side of the first battery cell is greater than the power generation efficiency of the second side of the second battery cell, and the first battery cell corresponds to the first color block.

8. The photovoltaic module according to claim 7, characterized in that: The color layer also includes a plurality of second color blocks arranged at intervals along the front glass, the first color blocks are different in color from the second color blocks, and the second color blocks correspond to the second battery cells to reduce the difference in power generation efficiency between the first battery cells and the second battery cells.

9. The photovoltaic module according to claim 3, characterized in that: The plurality of double-sided color cells include a third cell and a fourth cell, the third cell and the fourth cell are both configured such that the first printed layer is connected to the front adhesive film, the color of the first side of the third cell is the same as the color of the first side of the fourth cell, and the power generation efficiency of the first side of the third cell is different from the power generation efficiency of the first side of the fourth cell; The photovoltaic component also includes a color layer, which is located between the battery cell array and the front glass. The color layer includes a plurality of third color blocks and a plurality of fourth color blocks arranged at intervals along the front glass. The third color blocks and the fourth color blocks have different colors. The third color block and the fourth color block correspond to the third battery cell and the fourth battery cell, respectively.

10. The photovoltaic module according to claim 3, characterized in that: The plurality of double-sided color cells further include a fifth cell and a sixth cell, the color of the first side of the fifth cell is different from the color of the first side of the sixth cell, and the first printed layers of some of the fifth cells, the second printed layers of other fifth cells, and the first printed layers of the sixth cell are connected to the front adhesive film; The photovoltaic module also includes a color layer, which is located between the cell array and the front glass. The color layer includes three color blocks of different colors arranged at intervals along the front glass. The three color blocks of different colors correspond to some of the fifth cell arrays, the other fifth cell arrays, and the sixth cell array, respectively.

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