Solar cell string with shielding structure, solar cell module, power generation device and power utilization device

Abstract

The utility model discloses a solar cell string with a shielding structure, a solar cell module, a power generation device and a power utilization device. The solar cell string comprises a plurality of solar cells, each solar cell comprises a cell main body and an electrode layer located on one side of the cell main body, and the electrode layer comprises a first electrode and a second electrode which are arranged at an interval and have opposite polarities; the plurality of solar cells are positioned on one side of the conductive interconnection film and are electrically connected with the conductive interconnection film; the conductive interconnection film comprises a base film and a conductive layer located on the side, facing the solar cell, of the base film. The conductive layer comprises a first conductive structure arranged corresponding to the first electrode and electrically connected with the first electrode and a second conductive structure arranged corresponding to the second electrode and electrically connected with the second electrode. And the shielding component is at least positioned on one side, facing the solar cell, of the base film and in an area where the solar cell is not arranged. The shielding member can shield the colors of the base film and the conductive layer in the gap between the adjacent solar cells, so that the local color of the solar cell string can be optimized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of batteries, and in particular, relates to a solar cell string with a shielding structure, a solar cell module, a power generation device, and a power consumption device. BACKGROUND

[0002] A solar cell is a kind of semiconductor device that converts light energy into electrical energy. Higher application reliability, lower production cost, and higher energy conversion efficiency have always been the goals pursued by the solar cell industry. After the preparation of a solar cell is completed, various interconnection technologies are needed to form a solar cell string from individual solar cells, and then to realize application. However, the interconnection technology of the solar cell string still needs to be further improved. CONTENT OF THE UTILITY MODEL

[0003] In view of the technical problems in the background art, the first aspect of the present application provides a solar cell string with a shielding member, comprising: a plurality of solar cells, the solar cell comprising: a cell body, and an electrode layer located on one side of the cell body, the electrode layer comprising a first electrode and a second electrode arranged at intervals, the polarity of the first electrode and the second electrode being opposite; a conductive interconnection film, a plurality of the solar cells being located on one side of the conductive interconnection film, the conductive interconnection film electrically connecting a plurality of the solar cells; the conductive interconnection film comprising: a base film, and a conductive layer located on the side of the base film facing the solar cell, the conductive layer comprising: a first conductive structure corresponding to the first electrode and electrically connected, and a second conductive structure corresponding to the second electrode and electrically connected; a shielding member, the shielding member being located at least on the side of the base film facing the solar cell and in the region where the solar cell is not arranged.

[0004] Thus, the shielding member can shield the color of the base film and the conductive layer in the gap between adjacent solar cells, and thus the local color of the solar cell string can be optimized.

[0005] In some embodiments, the conductive layer further comprises a third conductive structure; one end of the third conductive structure is electrically connected to the first electrode of the solar cell adjacent to one side of the third conductive structure through the first conductive structure, the other end of the third conductive structure is electrically connected to the second electrode of the solar cell adjacent to the other side of the third conductive structure through the second conductive structure; the third conductive structure is located between the base film and the shielding member.

[0006] In some embodiments, the shielding member comprises one or more of an insulating film layer and an insulating coating layer.

[0007] In some embodiments, the color of the shielding member comprises black.

[0008] In some embodiments, an adhesive body having insulating properties is further included, the adhesive body being disposed in a region of the base film where the conductive layer is not disposed, the adhesive body being in contact with the base film and the battery body.

[0009] In some embodiments, a first contact surface is provided between the adhesive body and the base film, and a second contact surface is provided between the conductive layer and the electrode layer, the distance between the first contact surface and the battery body being less than or equal to the sum of the distance between the second contact surface and the battery body and the thickness of the conductive layer.

[0010] In some embodiments, the adhesive body has a positive curing volume shrinkage.

[0011] In some embodiments, the adhesive body is an epoxy resin cured product, a silicone cured product, an acrylic resin cured product, a polyurethane cured product, or a hot melt adhesive cured product.

[0012] In some embodiments, the adhesive body has elasticity.

[0013] In some embodiments, the base film having the adhesive body disposed on a surface thereof has a protruding structure facing the battery body.

[0014] In some embodiments, the base film crosses the boundary of the first electrode and / or the second electrode of the solar cell and is in contact with the adhesive body obliquely toward the solar cell.

[0015] In some embodiments, the base film has flexibility.

[0016] In some embodiments, the thickness of the base film is 10 μm to 5000 μm.

[0017] In some embodiments, the base film is polyimide, polyethylene terephthalate, polyethylene naphthalate, a liquid crystal display polymer, a polyolefin, or an ethylene-vinyl acetate copolymer.

[0018] In some embodiments, the first electrode, the second electrode adjacent to the first electrode, the battery body, the first conductive structure, the second conductive structure adjacent to the first conductive structure, and the base film form a housing space, and the adhesive body is located in the housing space.

[0019] In some embodiments, the adhesive bodies in a single housing space are continuously disposed or are disposed at intervals.

[0020] In some embodiments, the plurality of solar cells are arranged along a first direction, the first electrode and / or the second electrode continuously or discontinuously extend along the first direction, and the first electrode and the second electrode are alternately and spacedly arranged along a second direction, the first direction intersects the second direction.

[0021] In some embodiments, the first electrode comprises a first busbar electrode extending along the first direction, and a first finger electrode group crossing the first busbar electrode and electrically connected thereto; the first finger electrode group comprises a plurality of first finger electrodes, the plurality of first finger electrodes are spacedly arranged along the first direction; and / or, the second electrode comprises a second busbar electrode extending along the first direction, and a second finger electrode group crossing the second busbar electrode and electrically connected thereto; the second finger electrode group comprises a plurality of second finger electrodes, the plurality of second finger electrodes are spacedly arranged along the first direction.

[0022] In some embodiments, the electrically conductive layer and the electrode layer form the electrical connection by contact connection; and / or, the electrically conductive layer and the electrode layer form the electrical connection by conductive contact.

[0023] In some embodiments, the first electrically conductive structure and the first electrode form the electrical connection by contact connection; and / or, the first electrically conductive structure and the first electrode form the electrical connection by conductive contact.

[0024] In some embodiments, the second electrically conductive structure and the second electrode form the electrical connection by contact connection; and / or, the second electrically conductive structure and the second electrode form the electrical connection by conductive contact.

[0025] In a second aspect of the present application, a solar cell module is provided, comprising a plurality of solar cell strings of the first aspect of the present application spacedly arranged, and a shading member located in a region between adjacent solar cell strings. Thus, the local color of the solar cell module can be further optimized.

[0026] In a third aspect of the present application, a power generation device is provided, comprising the solar cell module of the second aspect of the present application.

[0027] In a fourth aspect of the present application, an electric device is provided, comprising the solar cell module of the second aspect of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0029] Figure 1is an exploded view of a solar cell module in one embodiment of the present application.

[0030] Figure 2 is a cross-sectional view of a solar cell in one embodiment of the present application.

[0031] Figure 3 is a distribution diagram of an electrode layer of a solar cell in one embodiment of the present application.

[0032] Figure 4 is a distribution diagram of an electrode layer of a solar cell in another embodiment of the present application.

[0033] Figure 5 is a distribution diagram of an electrode layer of a solar cell in another embodiment of the present application.

[0034] Figure 6 is a distribution diagram of an electrode layer of a solar cell in another embodiment of the present application.

[0035] Figure 7 is a structure diagram of a solar cell string in one embodiment of the present application.

[0036] Figure 8 is a layout diagram of a plurality of solar cells in one embodiment of the present application.

[0037] Figure 9 is a layout diagram of a plurality of solar cells in another embodiment of the present application.

[0038] Figure 10 is a layout diagram of a plurality of solar cells in another embodiment of the present application.

[0039] Figure 11 is a layout diagram of a plurality of solar cells in another embodiment of the present application.

[0040] Figure 12 is a structure diagram of a conductive interconnection film in one embodiment of the present application.

[0041] Figure 13 is a structure diagram of a conductive interconnection film in another embodiment of the present application.

[0042] Figure 14 is a structure diagram of a conductive interconnection film in another embodiment of the present application.

[0043] Figure 15 is a structure diagram of a conductive interconnection film in another embodiment of the present application.

[0044] Figure 16 is a cross-sectional view of the solar cell string along the A-A cross-sectional line shown in Figure 7 .

[0045] Figure 17 is a sectional view of the solar cell string A-A section line shown in another embodiment of the present application. Figure 7

[0046] Figure 18 is a distribution diagram of the adhesive in an embodiment of the present application.

[0047] Figure 19 is a distribution diagram of the adhesive in another embodiment of the present application.

[0048] Figure 20 is a structure diagram of the solar cell string in an embodiment of the present application.

[0049] Figure 21 is a one-end side view of the solar cell string in a solar cell module in an embodiment of the present application.

[0050] Figure 22 is a one-end side view of the solar cell string in a solar cell module in another embodiment of the present application.

[0051] Figure 23 is a one-end side view of the solar cell string in a solar cell module in another embodiment of the present application.

[0052] Figure 24 is a structure diagram of the solar cell module in an embodiment of the present application.

[0053] Reference Signs:

[0054] 1, first cell string group; 2, second cell string group.

[0055] 10, solar cell; 10a, first cell piece; 10b, second cell piece; 10c, third cell piece; 11, first electrode; 111, first finger electrode; 112, first busbar electrode; 12, second electrode; 121, second finger electrode; 122, second busbar electrode; 13, first semiconductor region; 14, second semiconductor region; 15, groove; 16, first interface passivation layer; 17, second interface passivation layer; 18, semiconductor substrate; 20, conductive interconnection film; 21, base film; 211, first region; 212, second region; 213, third region, 214, protrusion structure; 22, conductive layer; 221, first conductive structure; 222, second conductive structure; 223, third conductive structure; 224, busbar conductive structure; 225, conductive contact; 226, wiring conductive structure; 30, adhesive; 40, shielding member.

[0056] ​100: solar cell string; 200: first cover plate; 300: second cover plate; 400: first encapsulant layer; 500: second encapsulant layer; 600: busbar. DETAILED DESCRIPTION

[0057] The present application will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present application.

[0058] Hereinafter, specific embodiments of the solar cell string, the solar cell module, the power generation device, and the power consuming device of the present application having a shielding member will be described in detail with appropriate reference to the accompanying drawings. However, there will be cases where unnecessary detailed description is omitted. For example, there will be cases where detailed description of matters known well, repeated description of substantially identical structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided so that those skilled in the art can fully understand the present application, and are not intended to limit the subject matter recited in the claims.

[0059] The ranges disclosed herein are defined by their lower and / or upper limits. If a range is a sub-range, the sub-range is defined by selecting one of the lower or upper limits to define the boundary of the particular sub-range. Ranges defined by endpoints can include the endpoint(s) and ranges defined without endpoints can include the endpoint(s). Ranges can be combined in any manner, i.e., any lower limit can be combined with any upper limit to form a range, and any lower limit can be combined with any other lower limit to form a range, and any upper limit can be combined with any other upper limit to form a range. In addition, each individual point or individual number can be combined with any other point or individual number to form a range. For example, if the ranges 60-120 and 80-110 are listed for a particular parameter, it is understood that the ranges 60-110 and 80-120 are also contemplated. In addition, if the minimum range values 1 and 2 are listed, and if the maximum range values 3, 4, and 5 are listed, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In the present application, unless otherwise stated, a numerical range "a-b" indicates a shorthand way of describing each and every individual number that is within the range, wherein a and b are both real numbers. For example, the numerical range "0-5" indicates that all real numbers between "0-5" have been listed herein, and "0-5" is merely a shorthand way of describing these combinations of numbers. In addition, when a parameter is stated to be an integer ≥ 2, it is equivalent to stating that the parameter is, for example, the integer 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.

[0060] Unless otherwise indicated, all embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions, and such technical solutions should be considered to be included in the disclosure of the present application.

[0061] Unless otherwise indicated, all technical features and optional technical features of the present application can be combined with each other to form new technical solutions, and such technical solutions should be considered to be included in the disclosure of the present application.

[0062] Unless otherwise indicated, the terms "include" and "contain" mentioned in the present application are open-ended and can also be closed. For example, the terms "include" and "contain" can mean that other components not listed can also be included or contained, or only the listed components can be included or contained.

[0063] Unless otherwise indicated, in the present application, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any one of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or A and B are both true (or exist).

[0064] Unless otherwise indicated, in the present application, the term "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this paper generally means that the associated objects before and after are in an "or" relationship.

[0065] In the present application, the terms "a plurality of" and "a plurality of" mean two or more than two.

[0066] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as understood by those skilled in the art to which the present application belongs; the terms used in the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" in the specification and claims of the present application and any modification thereof are intended to cover non-exclusive inclusion. Unless otherwise indicated, the terms used in the present application have the commonly understood meaning by those skilled in the art. Unless otherwise indicated, the values of the parameters mentioned in the present application can be measured by various measurement methods commonly used in the art (for example, tests can be performed according to the methods given in the examples of the present application).

[0067] In the electrical interconnection technology of the solar cell 10, the positive and negative electrodes of the cell pieces are usually arranged on the back surface of the solar cell 10, and a sheet or film-shaped conductive interconnection piece is used to conductively interconnect the positive and negative electrodes of the solar cell 10, thereby increasing the light receiving area of the cell and improving the photoelectric conversion efficiency of the cell.

[0068] However, there are gap regions between adjacent cell pieces, which are exposed towards the light receiving surface, thereby damaging the overall visual effect of the solar cell module. Moreover, compared with the existing conductive wire interconnection technology, the interconnection form using a sheet or film-shaped conductive interconnection piece causes a larger exposed area, and this large-area exposure seriously affects the appearance aesthetics of the solar cell module, thereby limiting its promotion and use in some application scenarios with high requirements for appearance aesthetics.

[0069] Based on this, the first aspect of the present application provides a solar cell string with a shielding member, comprising: a plurality of solar cells 10, the solar cell 10 comprising: a cell body, and an electrode layer located on one side of the cell body, the electrode layer comprising a first electrode 11 and a second electrode 12 arranged at intervals, the polarities of the first electrode 11 and the second electrode 12 being opposite; a conductive interconnection film 20, the plurality of solar cells 10 being located on one side of the conductive interconnection film 20, the conductive interconnection film 20 electrically connecting the plurality of solar cells 10; the conductive interconnection film 20 comprising: a base film 21, and a conductive layer 22 located on the side of the base film 21 facing the solar cell 10, the conductive layer 22 comprising: a first conductive structure 221 corresponding to and electrically connected to the first electrode 11, and a second conductive structure 222 corresponding to and electrically connected to the second electrode 12; a shielding member 40, the shielding member 40 being located on the side of the base film 21 facing the solar cell 10 and in the region where the solar cell 10 is not arranged.

[0070] Therefore, the shielding member 40 can shield the colors of the base film 21 and the conductive layer 22 in the gap between adjacent solar cells 10, thereby optimizing the local color of the solar cell string 100.

[0071] The structure and connection relationship of the solar cell 10, the conductive interconnection film 20, and the shielding member 40 are further described below.

[0072] In some embodiments, the solar cell 10 comprises a cell body and an electrode layer located on one side of the cell body and electrically connected to the cell body. The solar cell 10 generates photo-generated carriers in the cell body through the photoelectric effect, and these carriers are collected and output by the electrode layer.

[0073] It can be understood that the cell body in the present application is the part of the solar cell 10 excluding the electrode layer. For example, Figure 2As shown, the battery body includes a semiconductor substrate 18, a plurality of first semiconductor regions 13 and a plurality of second semiconductor regions 14 located on one side of the semiconductor substrate 18. As an example, the first semiconductor regions 13 and the second semiconductor regions 14 are arranged alternately on the surface of the one side of the semiconductor substrate 18, forming an Interdigitated Back Contact battery.

[0074] In some embodiments, the first semiconductor regions 13 have a different conductivity type from the semiconductor substrate 18 and the second semiconductor regions 14. As an example, when the first semiconductor regions 13 have a P-type conductivity, the semiconductor substrate 18 and the second semiconductor regions 14 have an N-type conductivity. It can be understood that the semiconductor substrate 18 and the second semiconductor regions 14 can be silicon semiconductors doped with N-type doping elements such as phosphorus elements, arsenic elements or antimony elements; and the first semiconductor regions 13 can be silicon semiconductors doped with P-type doping elements such as boron elements, aluminum elements or gallium elements.

[0075] In some embodiments, the semiconductor substrate 18, the first semiconductor regions 13 and the second semiconductor regions 14 can be silicon semiconductors respectively and independently. As an example, the semiconductor substrate 18 and the second semiconductor regions 14 can be silicon semiconductors doped with phosphorus elements, and the first semiconductor regions 13 can be silicon semiconductors doped with boron elements.

[0076] In other embodiments, when the first semiconductor regions 13 have an N-type conductivity, the semiconductor substrate 18 and the second semiconductor regions 14 have a P-type conductivity.

[0077] In other embodiments, the semiconductor substrate 18, the first semiconductor regions 13 and the second semiconductor regions 14 can also be non-silicon semiconductors respectively and independently.

[0078] In some embodiments, the first semiconductor regions 13 and the second semiconductor regions 14 are electrically insulated from each other. As an example, as shown in FIG. 1, the first semiconductor regions 13 and the second semiconductor regions 14 are spaced apart, and a groove 15 is formed between the first semiconductor regions 13 and the second semiconductor regions 14, which can reduce the carrier recombination loss caused by the direct contact between the first semiconductor regions 13 and the second semiconductor regions 14. As an example, a dielectric layer can also be provided between the first semiconductor regions 13 and the second semiconductor regions 14, which has high insulation and can effectively electrically insulate the first semiconductor regions 13 and the second semiconductor regions 14 from each other. Figure 2

[0079] ​In other embodiments, the first semiconductor region 13 and the second semiconductor region 14 are electrically coupled in a localized region. This localized region refers to a specific part or location within the battery; it can be a small portion of the battery or a specific functional area within the battery. Within this localized region, the first semiconductor region 13 and the second semiconductor region 14 can form an electrical path through direct contact or by tunneling through the dielectric layer. This allows some charge carriers to recombine at these contact points. This recombination process causes current leakage, resulting in reduced battery power generation efficiency. However, this localized leakage can be used to improve the solar cell string 100's resistance to hot spots.

[0080] In some embodiments, the first semiconductor region 13 can be polysilicon doped with N-type doped elements such as phosphorus, arsenic, or antimony, and the second semiconductor region 14 can be polysilicon doped with P-type doped elements such as boron, aluminum, or gallium. Figure 2 As shown, the battery body may further include a first interface passivation layer 16 and a second interface passivation layer 17, wherein the first interface passivation layer 16 is located between the first semiconductor region 13 and the semiconductor substrate 18, and the second interface passivation layer 17 is located between the second semiconductor region 14 and the semiconductor substrate 18. The first interface passivation layer 16 and the second interface passivation layer 17 may be made of the same type of material or different types of materials. As an example, the first interface passivation layer 16 and the second interface passivation layer 17 may each be independently made of at least one of silicon oxide, aluminum oxide, titanium oxide, silicon carbide, and amorphous silicon.

[0081] In some embodiments, the first interface passivation layer 16 and / or the second interface passivation layer 17 may be dielectric layers with tunneling effects. As an example, the first interface passivation layer 16 and the second interface passivation layer 17 may each be independently an ultrathin dielectric film with a thickness of 0.5 nm to 2 nm, wherein the thickness of the ultrathin dielectric film may be 0.5 nm, 0.7 nm, 0.9 nm, 1.1 nm, 1.3 nm, 1.5 nm, 1.7 nm, 1.9 nm, 2.0 nm, etc., or a range consisting of any two of the above values. As an example, the first interface passivation layer 16 and the second interface passivation layer 17 may also each be independently a dielectric layer with a thickness of 2 nm to 10 nm, wherein the thickness of the dielectric layer may be 2 nm, 3 nm, 4 nm, 5 nm, 6 nm, 7 nm, 8 nm, 9 nm, 10 nm, etc., or a range consisting of any two of the above values. The first interface passivation layer 16 and / or the second interface passivation layer 17 have pinholes, which can provide migration channels for charge carriers.

[0082] In some embodiments, the first semiconductor region 13 can be doped amorphous silicon doped with N-type doping elements such as phosphorus element, arsenic element or antimony element, and the second semiconductor region 14 can be amorphous silicon doped with P-type doping elements such as boron element, aluminum element or gallium element.

[0083] In some embodiments, the first interface passivation layer 16 and the second interface passivation layer 17 can be silicon oxide, and the first semiconductor region 13 and the second semiconductor region 14 can be doped polysilicon respectively and independently. The cell body can further comprise a passivation layer located on the side surface of the first semiconductor region 13 and the second semiconductor region 14 away from the semiconductor substrate 18. The passivation layer is provided with a notch, and the first electrode 11 and the second electrode 12 can be electrically connected to the first semiconductor region 13 and the second semiconductor region 14 respectively through the notch.

[0084] In some embodiments, the first interface passivation layer 16 and the second interface passivation layer 17 can be intrinsic amorphous silicon, the first semiconductor region 13 can be doped amorphous silicon doped with N-type doping elements such as phosphorus element, arsenic element or antimony element, and the second semiconductor region 14 can be amorphous silicon doped with P-type doping elements such as boron element, aluminum element or gallium element.

[0085] In some embodiments, the first semiconductor region 13 can be doped polysilicon, and the second semiconductor region 14 can be doped amorphous silicon. A tunneling layer is arranged between the first semiconductor region 13 and the semiconductor substrate 18, and an intrinsic semiconductor layer is arranged between the second semiconductor region 14 and the semiconductor substrate 18. Alternatively, the second semiconductor region 14 can be doped polysilicon, and the first semiconductor region 13 can be doped amorphous silicon. A tunneling layer is arranged between the second semiconductor region 14 and the semiconductor substrate 18, and an intrinsic semiconductor layer is arranged between the first semiconductor region 13 and the semiconductor substrate 18.

[0086] In some embodiments, the first electrode 11 and / or the second electrode 12 continuously extends or discontinuously extends along a first direction, and the first electrode 11 and the second electrode 12 are alternately and spacedly arranged along a second direction, and the first direction intersects the second direction. As an example, as shown in FIG. 1, the first electrode 11 and / or the second electrode 12 continuously extends along the first direction (D1) in a straight line segment. As an example, as shown in FIG. 2, the first electrode 11 and / or the second electrode 12 discontinuously extends along the first direction in a plurality of continuous straight line segments. As an example, as shown in FIG. 3, the first electrode 11 and / or the second electrode 12 discontinuously extends along the first direction in a plurality of continuous points. The plurality of continuous straight line segments and the point-shaped first electrode 11 and / or the second electrode 12 can save electrode material and reduce the cost of the solar cell 10. Figure 3 Figure 4 Figure 5

[0087] ​​​In some implementations, such as Figures 3-5 As shown, along the second direction (D2), the spacing between adjacent first electrodes 11 and second electrodes 12 is equal. Therefore, the uniform electrode spacing reduces localized stress and thermal inhomogeneity in the battery, thereby improving battery reliability and lifespan.

[0088] In some implementations, the first direction and the second direction can be perpendicular or substantially perpendicular. "Substantially perpendicular" means that the angle between the first direction and the second direction can be 80-100 degrees, optionally 85-95 degrees, or further optionally 88-92 degrees.

[0089] In some embodiments, the first electrode 11 and the second electrode 12 have opposite polarities. For example, when the first electrode 11 is a positive electrode, the second electrode 12 is a negative electrode. For example, when the first electrode 11 is a negative electrode, the second electrode 12 is a positive electrode.

[0090] In other implementations, such as Figure 6 As shown, the first electrode 11 includes a first bus electrode 112 extending along a first direction, and a group of first finger electrodes 111 intersecting and electrically connected to the first bus electrode 112; the group of first finger electrodes 111 includes a plurality of first finger electrodes 111, which are spaced apart along the first direction. The second electrode 12 includes a second bus electrode 122 extending along the first direction, and a group of second finger electrodes 121 intersecting and electrically connected to the second bus electrode 122; the group of second finger electrodes 121 includes a plurality of second finger electrodes 121, which are spaced apart along the first direction. A first finger electrode 111 is located between two adjacent second finger electrodes 121, and a second finger electrode 121 is located between two adjacent first finger electrodes 111.

[0091] In some embodiments, the spacing between adjacent first bus electrodes 112 and second bus electrodes 122 is equal along the second direction.

[0092] In some embodiments, the spacing between adjacent first finger electrodes 111 is equal along a first direction; and / or, the spacing between adjacent second finger electrodes 121 is equal.

[0093] In some embodiments, the first bus electrode 112 and / or the second bus electrode 122 includes two sides disposed opposite each other along a second direction, and each side of the first bus electrode 112 and / or the second bus electrode 122 is independently provided with an insulating material. For example, insulating adhesive can be provided on both sides of the first bus electrode 112 and / or the second bus electrode 122 to cover the ends of the non-linear finger electrodes, thereby ensuring sufficient electrical insulation between the bus electrode and the adjacent non-linear finger electrodes and guaranteeing a stable circuit connection.

[0094] In the present application, as shown in Figures 3-5 The solar cell 10 shown in the present application has no bus electrode, which saves electrode material and reduces the cost of the solar cell.

[0095] In some embodiments, as shown in Figure 7 The solar cell string 100 includes the conductive interconnection film 20 and a plurality of solar cells 10 located on one side of the conductive interconnection film 20 and electrically connected to the conductive interconnection film 20, and the plurality of solar cells 10 are arranged along the first direction. In this way, the plurality of solar cells 10 can be connected in series to form the solar cell string 100 through the conductive interconnection film 20. In a single solar cell string 100, 2, 3, 4, 5, 6, 7, or more solar cells 10 can be included. The number of solar cells 10 can be set according to actual use needs.

[0096] In some embodiments, the conductive interconnection film 20 can have a strip shape with a certain width and length; wherein the length is in the first direction and the width is in the second direction. The plurality of solar cells 10 are arranged along the length direction of the conductive interconnection film 20 and are electrically connected by the conductive interconnection film 20 to form the solar cell string 100.

[0097] In some embodiments, the spacing between adjacent solar cells 10 is equal.

[0098] In some embodiments, along the first direction, the first electrode 11 of the solar cell 10 and the second electrode 12 of the adjacent solar cell 10 are on the same straight line. For example, as shown in Figures 8-9 The solar cell string 100 includes three first, second, and third solar cells 10a, 10b, and 10c arranged in sequence along the first direction. The first electrode 11 of the first solar cell 10a, the second electrode 12 of the second solar cell 10b, and the first electrode 11 of the third solar cell 10c are on the same straight line; the second electrode 12 of the first solar cell 10a, the first electrode 11 of the second solar cell 10b, and the second electrode 12 of the third solar cell 10c are on the same straight line.

[0099] In some embodiments, along the first direction, the first electrode 11 of the solar cell 10 and the first electrode 11 of the adjacent solar cell 10 are on the same straight line. For example, as shown in Figure 10 or Figure 11 The first electrode 11 of the first solar cell 10a, the first electrode 11 of the second solar cell 10b, and the first electrode 11 of the third solar cell 10c are on the same straight line; the second electrode 12 of the first solar cell 10a, the second electrode 12 of the second solar cell 10b, and the second electrode 12 of the third solar cell 10c are on the same straight line.

[0100] In some embodiments, the conductive interconnection film 20 includes a base film 21 and a conductive layer 22 on a side of the base film 21 facing the solar cell 10.

[0101] In some embodiments, the base film 21 is flexible. During the lamination process of the solar cell module, the encapsulant is heated and pressed, which melts the encapsulant and applies pressure to the base film 21 toward the solar cell 10, so as to press the conductive layer 22 toward the electrode layer, thereby improving the reliability of the contact between the conductive layer 22 and the electrode layer.

[0102] In some embodiments, the base film 21 can be a thin film with uniform thickness or substantially uniform thickness.

[0103] In some embodiments, the thickness of the base film 21 is 10 μm-5000 μm. As an example, the thickness of the base film 21 can be 10 μm, 50 μm, 100 μm, 200 μm, 400 μm, 600 μm, 800 μm, 1000 μm, 1200 μm, 1400 μm, 1600 μm, 1800 μm, 2000 μm, 2200 μm, 2400 μm, 2600 μm, 2800 μm, 3000 μm, 3200 μm, 3400 μm, 3600 μm, 3800 μm, 4000 μm, 4200 μm, 4400 μm, 4600 μm, 4800 μm, 5000 μm, or a range between any two of the above values. In some other embodiments of the present application, the thickness of the base film 21 can be 10 μm-100 μm.

[0104] In some embodiments, the base film 21 can be a flexible sheet of electrically insulating material. As an example, the base film 21 includes, but is not limited to, at least one of polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), liquid crystal polymer (LCP), polyolefin (PO), and ethylene-vinyl acetate copolymer (EVA).

[0105] In some embodiments, the conductive layer 22 includes a metal foil, which includes, but is not limited to, one or more of copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, gold, gold alloy, silver, and silver alloy. As an example, the conductive layer 22 can be a single layer, or a double or multi-layer formed by stacking different conductive materials.

[0106] In some embodiments, the conductive layer 22 can be a metal foil adhered to the surface of the base film 21 by an adhesive, or can be adhered by heat pressing using the adhesion of the base film 21 at high temperature. The conductive layer 22 can be, for example, a flexible copper clad plate (FPC plate). The conductive layer 22 can also be deposited on the surface of the base film 21 by chemical deposition, physical deposition, electroplating, etc.

[0107] In some embodiments, the conductive layer 22 is patterned, for example, the conductive layer 22 can be patterned by wet etching, laser melting, plasma etching, etc.

[0108] In some embodiments, the thickness of the conductive layer 22 is 10 μm-100 μm. For example, the thickness of the conductive layer 22 can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc., or a range between any two of the above values.

[0109] In some embodiments, along the first direction, the base film 21 is divided into first regions 211 and second regions 212 arranged alternately, wherein the solar cells 10 are electrically connected to the first regions 211, and the second regions 212 are the spacing regions of adjacent solar cells 10. For example, as shown in Figures 12-15 , along the first direction, the base film 21 is sequentially divided into a first region 211a, a second region 212a, a first region 211b, a second region 212b, and a first region 211c. The number of the first regions 211 is the same as the number of the solar cells 10.

[0110] In some embodiments, the conductive layer 22 includes a first conductive structure 221 corresponding to and electrically connected to the first electrode 11, and a second conductive structure 222 corresponding to and electrically connected to the second electrode 12. Thus, the first conductive structure 221 and the second conductive structure 222 are located in the first region 211. The first conductive structure 221 and the second conductive structure 222 are isolated from each other in the first region 211, and the shapes and arrangement modes of the first conductive structure 221 and the second conductive structure 222 are adapted to the shapes and arrangement modes of the first electrode 11 and the second electrode 12 of the solar cell 10, respectively.

[0111] For example, as shown in Figures 12-15 , the first conductive structure 221 and / or the second conductive structure 222 in each first region 211 continuously extend along the first direction, and the first conductive structure 221 and the second conductive structure 222 are alternately and spacedly arranged along the second direction, the first direction intersects the second direction. Wherein, Figures 12-15In the example, the first conductive structures 221 are shown with black rectangular bars, and the second conductive structures 222 are shown with gray rectangular bars.

[0112] As shown in Figure 8 and Figure 12 , along the first direction, when the first electrode 11 of a solar cell 10 is in line with the second electrode 12 of an adjacent solar cell 10, the first conductive structures 221 of the first region 211a, the second conductive structures 222 of the first region 211b, and the first conductive structures 221 of the first region 211c are in line; the second conductive structures 222 of the first region 211a, the first conductive structures 221 of the first region 211b, and the second conductive structures 222 of the first region 211c are in line.

[0113] As shown in Figure 6 , Figure 9 and Figure 12 , when the first electrode 11 includes the first busbar electrode 112 and the first finger electrode 111, and the second electrode 12 includes the second busbar electrode 122 and the second finger electrode 121, the first conductive structures 221 and the second conductive structures 222 can also include finger conductive structures to fit the first finger electrode 111 and the second finger electrode 121.

[0114] As shown in Figure 10 and Figure 13 , along the first direction, when the first electrode 11 of a solar cell 10 is in line with the first electrode 11 of an adjacent solar cell 10, the first conductive structures 221 of the first region 211a, the first conductive structures 221 of the first region 211b, and the first conductive structures 221 of the first region 211c are in line; the second conductive structures 222 of the first region 211a, the second conductive structures 222 of the first region 211b, and the second conductive structures 222 of the first region 211c are in line.

[0115] As shown in Figure 6 , Figure 11 and Figure 13 , when the first electrode 11 includes the first busbar electrode 112 and the first finger electrode 111, and the second electrode 12 includes the second busbar electrode 122 and the second finger electrode 121, the first conductive structures 221 and the second conductive structures 222 can also include finger conductive structures to fit the first finger electrode 111 and the second finger electrode 121.

[0116] In some embodiments, the conductive layer 22 further comprises a third conductive structure 223; one end of the third conductive structure 223 is electrically connected to the first conductive structure 221 of the first region 211 adjacent to one side of the third conductive structure 223, and the other end of the third conductive structure 223 is electrically connected to the second conductive structure 222 of the first region 211 adjacent to the other side of the third conductive structure 223. Specifically, one end of the third conductive structure 223 is electrically connected to the first electrode 11 of the solar cell 10 adjacent to one side of the third conductive structure 223 through the first conductive structure 221, and the other end of the third conductive structure 223 is electrically connected to the second electrode 12 of the solar cell 10 adjacent to the other side of the third conductive structure 223 through the second conductive structure 222. Thus, the third conductive structure 223 connects the adjacent solar cells 10 in series.

[0117] As an example, as shown in FIG. 2, one end of the third conductive structure 223 is connected to the first conductive structure 221 of the first region 211a, and the other end of the third conductive structure 223 is connected to the second conductive structure 222 of the first region 211b. The first conductive structure 221 of the first region 211a, the third conductive structure 223, and the second conductive structure 222 of the first region 211b are on the same straight line, and can be integrally provided. It can be understood that the third conductive structure 223 is located in the second region 212 of the base film 21. Figure 12 As an example, as shown in FIG. 2, one end of the third conductive structure 223 is connected to the first conductive structure 221 of the first region 211a, and the other end of the third conductive structure 223 is connected to the second conductive structure 222 of the first region 211b. The first conductive structure 221 of the first region 211a, the third conductive structure 223, and the second conductive structure 222 of the first region 211b are on the same straight line, and can be integrally provided. It can be understood that the third conductive structure 223 is located in the second region 212 of the base film 21.

[0118] Figure 13 As an example, as shown in FIG. 2, one end of the third conductive structure 223 is connected to the first conductive structure 221 of the first region 211a, and the other end of the third conductive structure 223 is connected to the second conductive structure 222 of the first region 211b. The first conductive structure 221 of the first region 211a, the third conductive structure 223, and the second conductive structure 222 of the first region 211b are on the same straight line, and can be integrally provided. It can be understood that the third conductive structure 223 is located in the second region 212 of the base film 21.

[0119] In some embodiments, the shielding member 40 is located at least in the region of the base film 21 facing the solar cells 10 and not provided with the solar cells 10. Since there is a gap between the solar cells 10, the shielding member 40 can shield the color of the base film 21 and the conductive layer 22 in the gap between the adjacent solar cells 10, thereby optimizing the local color of the solar cell string.

[0120] As an example, as shown in FIG. 2, one end of the third conductive structure 223 is connected to the first conductive structure 221 of the first region 211a, and the other end of the third conductive structure 223 is connected to the second conductive structure 222 of the first region 211b. The first conductive structure 221 of the first region 211a, the third conductive structure 223, and the second conductive structure 222 of the first region 211b are on the same straight line, and can be integrally provided. It can be understood that the third conductive structure 223 is located in the second region 212 of the base film 21. Figure 12 Figure 20 As an example, as shown in FIG. 2, one end of the third conductive structure 223 is connected to the first conductive structure 221 of the first region 211a, and the other end of the third conductive structure 223 is connected to the second conductive structure 222 of the first region 211b. The first conductive structure 221 of the first region 211a, the third conductive structure 223, and the second conductive structure 222 of the first region 211b are on the same straight line, and can be integrally provided. It can be understood that the third conductive structure 223 is located in the second region 212 of the base film 21.

[0121] ​​As an example, the shielding member 40 can be a film attached to the conductive interconnection film 20, or a coating applied to the conductive interconnection film 20. The film or the coating has insulating properties.

[0122] As an example, the shielding member 40 has a color including black.

[0123] In some embodiments, the conductive layer 22 further includes a bus conductive structure 224. As shown in Figure 14 and Figure 15 The bus conductive structure 224 can be located within the second region 212a and the second region 212b, and the bus conductive structure 224 extends along the second direction. The first conductive structure 221 of the first region 211a extends to the bus conductive structure 224 and has an intersection with the bus conductive structure 224, and the second conductive structure 222 of the first region 211b extends to the bus conductive structure 224 and has an intersection with the bus conductive structure 224. At this time, the first conductive structure 221 and the second conductive structure 222 in the first region 211a and the second region 212b that are conductive to each other are connected to the bus conductive structure 224. Thus, the bus conductive structure 224 connects the adjacent solar cells 10 in series.

[0124] In some embodiments, the conductive layer 22 further includes a wiring conductive structure 226. Along the first direction, the two ends of the base film 21 are divided into a third region 213 and a fourth region, and the wiring conductive structure 226 is located in the third region 213 and the fourth region. When the first conductive structure 221 of the first region 211 is electrically connected to the second conductive structure 222 of the adjacent first region 211, the wiring conductive structure 226 of the third region 213 is electrically connected to the second conductive structure 222 of the first region 211 adjacent to the third region 213, and the wiring conductive structure 226 of the fourth region is electrically connected to the first conductive structure 221 of the first region 211 adjacent to the fourth region. The wiring conductive structure 226 is used to externally connect the circuit to lead out the current generated by the single solar cell string 100.

[0125] As an example, as shown in Figures 13-15 Along the first direction, one end of the base film 21 includes the third region 213 adjacent to the first region 211a. When the first conductive structure 221 of the first region 211a is electrically connected to the second conductive structure 222 of the first region 211b, the wiring conductive structure 226 of the third region 213 is electrically connected to the second conductive structure 222 of the first region 211a. Optionally, the wiring conductive structure 226 of the third region 213 is integrally provided with the second conductive structure 222 of the first region 211a.

[0126] In some embodiments, the solar cell string 100 comprises an adhesive 30 having insulating property, which is arranged on the base film 21 in the region where the conductive layer 22 is not arranged, and contacts the base film 21 and the cell body. Thus, the conductive interconnection film 20 and the plurality of solar cells 10 are bonded into one whole by the adhesive 30.

[0127] In some embodiments, the conductive layer 22 and the electrode layer are electrically connected by contact connection. As shown in FIG. 2, under the action of the adhesive 30, the first conductive structure 221 and the first electrode 11 can be electrically connected only by contact connection; and / or, the second conductive structure 222 and the second electrode 12 can be electrically connected only by contact connection. It can be understood that the contact connection for electrical connection can be that the first conductive structure 221 and the second conductive structure 222 are in direct physical contact with the first electrode 11 and the second electrode 12, respectively, so that the solar cell string 100 of the present application has no welding points, bonds or intermediate conductive connectors, etc. Figure 16

[0128] In other embodiments, the conductive layer 22 and the electrode layer can also be electrically connected by the conductive contact 225. As shown in FIG. 3, the first conductive structure 221 and the first electrode 11 are electrically connected by the conductive contact 225; and / or, the second conductive structure 222 and the second electrode 12 are electrically connected by the conductive contact 225. The conductive contact 225 between the conductive layer 22 and the electrode layer can be formed by laser welding, ultrasonic welding, thermal infrared welding, resistance heating welding, etc., or a conductive adhesive can be applied between the conductive layer 22 and the electrode layer to form the conductive contact 225, and the conductive adhesive can be ECA, solder paste, etc. For laser welding, ultrasonic welding, conductive adhesive, etc., the solar cells 10 can be connected at a lower temperature to reduce the degree of warping of the solar cells 10. Figure 17

[0129] In some embodiments, the width of the first conductive structure 221 is greater than or equal to the width of the first electrode 11; and / or, the width of the second conductive structure 222 is greater than or equal to the width of the second electrode 12.

[0130] ​​In some embodiments, the width of the first conductive structure 221 and the width of the second conductive structure 222 are each independently 30 pm to 600 pm. As an example, the width of the first conductive structure 221 can be 30 pm, 60 pm, 90 pm, 120 pm, 150 pm, 180 pm, 210 pm, 240 pm, 270 pm, 300 pm, 330 pm, 360 pm, 390 pm, 420 pm, 450 pm, 480 pm, 510 pm, 540 pm, 570 pm, 600 pm, or the like, or a range defined by any two of the above. As an example, the width of the second conductive structure 222 can be 30 pm, 60 pm, 90 pm, 120 pm, 150 pm, 180 pm, 210 pm, 240 pm, 270 pm, 300 pm, 330 pm, 360 pm, 390 pm, 420 pm, 450 pm, 480 pm, 510 pm, 540 pm, 570 pm, 600 pm, or the like, or a range defined by any two of the above.

[0131] In some embodiments, when the first electrode 11 includes the first finger electrode 111 and the first bus electrode 112, and the second electrode 12 includes the second finger electrode 121 and the second bus electrode 122, the width of the first finger electrode 111 and the width of the second finger electrode 121 are each independently 5 pm to 50 pm. As an example, the width of the first finger electrode 111 can be 5 pm, 10 pm, 15 pm, 20 pm, 25 pm, 30 pm, 35 pm, 40 pm, 45 pm, 50 pm, or the like, or a range defined by any two of the above. As an example, the width of the second finger electrode 121 can be 5 pm, 10 pm, 15 pm, 20 pm, 25 pm, 30 pm, 35 pm, 40 pm, 45 pm, 50 pm, or the like, or a range defined by any two of the above.

[0132] In some embodiments, the widths of the first bus electrode 112 and the second bus electrode 122 are independently 30 μm to 600 μm. As an example, the width of the first bus electrode 112 can be 30 μm, 60 μm, 90 μm, 120 μm, 150 μm, 180 μm, 210 μm, 240 μm, 270 μm, 300 μm, 330 μm, 360 μm, 390 μm, 420 μm, 450 μm, 480 μm, 510 μm, 540 μm, 570 μm, 600 μm, etc., or a range consisting of any two of the above values. As an example, the width of the second bus electrode 122 can be 30μm, 60μm, 90μm, 120μm, 150μm, 180μm, 210μm, 240μm, 270μm, 300μm, 330μm, 360μm, 390μm, 420μm, 450μm, 480μm, 510μm, 540μm, 570μm, 600μm, etc., or a range consisting of any two of the above values.

[0133] In some embodiments, the spacing between the first conductive structure 221 and the second conductive structure 222 is 30 μm to 600 μm. As an example, the spacing between the first conductive structure 221 and the second conductive structure 222 can be 30 μm, 60 μm, 90 μm, 120 μm, 150 μm, 180 μm, 210 μm, 240 μm, 270 μm, 300 μm, 330 μm, 360 μm, 390 μm, 420 μm, 450 μm, 480 μm, 510 μm, 540 μm, 570 μm, 600 μm, etc., or a range consisting of any two of the above values.

[0134] In some implementations, such as Figures 16-17 As shown, a first electrode 11, a second electrode 12 adjacent to the first electrode 11, a battery body, a first conductive structure 221, a second conductive structure 222 adjacent to the first conductive structure 221, and a base film 21 form a receiving space, and an adhesive 30 is located within the receiving space.

[0135] In some embodiments, the adhesive elements 30 within a single receiving space are arranged continuously or at intervals. For example, Figure 18 As shown, the adhesive 30 can be disposed in the entire area of ​​the same accommodating space. Figure 18 (Only the area of ​​the housing space facing the battery body is shown in the image). As an example, such as... Figure 19 As shown, the adhesive 30 can also be disposed in a local area of ​​the same receiving space. Figure 19 (Only the area of ​​the housing facing the battery body is shown in the image).

[0136] In some embodiments, the adhesive 30 has a first contact surface with the base film 21, and the conductive layer 22 has a second contact surface with the electrode layer. The distance between the first contact surface and the battery body is less than or equal to the sum of the distance between the second contact surface and the battery body and the thickness of the conductive layer. This facilitates good physical contact between the conductive layer 22 and the electrode layer. It is understood that the reference plane used for measuring both the distance between the first contact surface and the battery body, and the distance between the second contact surface and the battery body, is the same and consistent.

[0137] As an example, the minimum distance between the first contact surface and the semiconductor substrate 18 is less than or equal to the sum of the minimum distance between the second contact surface and the semiconductor substrate 18 and the thickness of the conductive layer 22.

[0138] Specifically, since the electrode layer includes a first electrode 11 and a second electrode 12 arranged at intervals, and the first electrode 11 and the second electrode 12 are usually fabricated separately during the fabrication of the solar cell 10, the thickness of the first electrode 11 and the thickness of the second electrode 12 may be different, resulting in different distances between the second contact surfaces corresponding to the first electrode 11 and the second electrode 12 and the battery body. In this application, the distance between the second contact surface and the battery body is selected as the minimum distance between the second contact surfaces corresponding to the first electrode 11 and the second electrode 12 and the battery body.

[0139] In some embodiments, the adhesive 30 has a first contact surface with the base film 21, and the conductive layer 22 has a third contact surface with the base film 21. The distance between the first contact surface and the battery body is less than or equal to the distance between the third contact surface and the battery body. This facilitates good physical contact between the conductive layer 22 and the electrode layer. It is understood that the reference plane used for measuring both the distance between the first contact surface and the battery body, and the distance between the third contact surface and the battery body, is the same and consistent.

[0140] In some implementations, such as Figure 16 As shown, the base film 21, on which the adhesive 30 is disposed, has a protruding structure 214 facing the battery body. Thus, the protruding structure 214 of the base film 21 presses the conductive layer 22 against the electrode layer of the solar cell 10, thereby forming a good conductive contact between the conductive layer 22 and the electrode layer.

[0141] In some embodiments, the base film 21 extends across the boundary of the first electrode 11 and / or the second electrode 12 of the solar cell 10 and contacts the adhesive 30 at an angle toward the solar cell 10, so that the base film 21 presses the conductive layer 22 toward the electrode layer of the solar cell 10, thereby forming a good physical contact between the conductive layer 22 and the electrode layer.

[0142] In some embodiments, the adhesive 30 comprises at least one of an epoxy cured product, a silicone cured product, an acrylic cured product, a polyurethane cured product, a hot-melt adhesive cured product. Thus, the raw material of the adhesive 30 can be at least one of an epoxy adhesive, a silicone adhesive, an acrylic adhesive, a polyurethane adhesive. These raw materials shrink in volume during the curing process, thereby driving the base film 21 to move towards the solar cell 10, pressing the conductive layer 22 against the electrode layer, so that the conductive layer 22 and the electrode layer form good physical contact.

[0143] In some embodiments, the raw material of the adhesive 30 can be in a flowable state before curing, and can be disposed on the solar cell 10 by printing or printing. For example, the raw material of the adhesive 30 can be an epoxy adhesive, a silicone adhesive, an acrylic adhesive, or a polyurethane adhesive.

[0144] In some embodiments, the raw material of the adhesive 30 can be in a solid state before curing, and when the raw material of the adhesive 30 is applied, an instant heating process is required to be performed on the raw material of the adhesive 30 by using a device, so that the raw material of the adhesive 30 becomes a flowable state. For example, the raw material of the adhesive 30 can be a hot-melt adhesive.

[0145] In some embodiments, the adhesive 30 has a positive curing volume shrinkage rate. Specifically, the raw material of the adhesive 30 (such as an epoxy adhesive, a silicone adhesive, an acrylic adhesive, a polyurethane adhesive) gradually shrinks in volume during the curing process, showing a positive curing volume shrinkage rate, and thus obtaining the adhesive 30 with a positive curing volume shrinkage rate.

[0146] In some embodiments, the adhesive 30 has elasticity. Thus, during the lamination operation of the solar cell module, the encapsulant will be heated and pressed, which will cause the encapsulant to melt and exert pressure on the flexible base film 21 towards the solar cell 10. At this time, the adhesive 30 can be compressed, so that the distance of the region of the base film 21 without the conductive layer 22 moving towards the solar cell 10 is greater than the distance of the region of the base film 21 with the conductive layer 22 moving towards the solar cell 10. This displacement difference is conducive to maintaining good conductive contact between the conductive layer 22 and the electrode layer. When the encapsulant is cured, the pressure on the part of the base film 21 without the conductive layer 22 will be maintained, so that the conductive layer 22 and the electrode layer always maintain good conductive contact.

[0147] In the process of forming the adhesive body 30, the raw material of the adhesive body 30 can be pre-disposed on the surface of the base film 21, specifically, all or part of the spacing region between the first conductive structure 221 and the second conductive structure 222. The raw material of the adhesive body 30 can also be pre-disposed on the surface of the battery body, specifically, all or part of the spacing region between the first electrode 11 and the second electrode 12. The raw material of the adhesive body 30 can also be disposed on the surface of the base film 21 and the surface of the battery body at the same time. However, the raw material of the adhesive body 30 applied should be appropriate, and the raw material of the adhesive body 30 has fluidity at the initial stage of solidification. Excessive raw material of the adhesive body 30 is prone to flow to the electrode layer and the conductive layer 22, which affects the conductive effect of the electrode layer and the conductive layer 22.

[0148] In some embodiments, the adhesive body 30 can serve as an electrically insulating medium between the first electrode 11 and the second electrode 12, and between the first conductive structure 221 and the second conductive structure 222, to reduce the risk of leakage of the solar cell string 100.

[0149] In this application, the process of forming the solar cell string 100 can be: first, coating the raw material of the adhesive body 30 in the region between the first electrode 11 and the second electrode 12 of the solar cell 10, then aligning the first electrode 11 of the plurality of solar cells 10 and the first conductive structure 221 of the corresponding region in turn, and aligning the second electrode 12 and the second conductive structure 222 of the corresponding region. After the raw material of the adhesive body 30 is solidified, the conductive interconnection film 20 and the plurality of solar cells 10 form a whole, which is the solar cell string 100.

[0150] In the second aspect of the present application, the present application provides a solar cell module comprising a plurality of solar cell strings 100 of the first aspect of the present application arranged at intervals.

[0151] In some embodiments, as shown in FIG. 1, the plurality of solar cell strings are arranged at intervals along the first direction and / or the second direction. Figure 1

[0152] In some embodiments, the conductive interconnection film 20 can have a strip shape with a certain width and length; wherein the length is in the first direction and the width is in the second direction. The plurality of solar cells 10 are arranged along the length direction of the conductive interconnection film 20 and are electrically connected by the conductive interconnection film 20 to form the solar cell string 100. The width of the conductive interconnection film 20 can be less than or equal to the length of the solar cell 10 along the second direction. In this way, the long side of the conductive interconnection film 20 can be hidden behind the back surface of the solar cell 10 (in the solar cell 10, the incident surface of light is defined as the front surface), thereby reducing the exposed part of the conductive interconnection film 20 between the solar cell strings 100 and reducing the adverse effect on the appearance of the solar cell module.

[0153] ​In some embodiments, the width of the conductive interconnect film 20 is 150mm-1400mm. For example, the width of the conductive interconnect film 20 can be 150mm, 240mm, 340mm, 440mm, 540mm, 640mm, 740mm, 840mm, 940mm, 1040mm, 1140mm, 1240mm, 1340mm, 1400mm, etc., or a range consisting of any two of the above values.

[0154] In other embodiments, the solar cells 10 are arranged in a rectangular array on the conductive interconnect film 20, and all solar cells 10 are electrically connected to the conductive interconnect film 20. In this case, the conductive interconnect film 20 can be module-level, and its length and width can substantially cover the array of solar cells 10. All solar cells 10 in the solar cell module are attached to the conductive interconnect film 20. The conductive layer 22 of the conductive interconnect film 20 can connect these solar cells 10 in series to form several solar cell strings 100.

[0155] In some embodiments, the solar cell module further includes a plurality of busbars 600, which are electrically connected to the positive terminal of a solar cell string 100 and the negative terminal of an adjacent solar cell string 100 to connect the individual solar cell strings 100 in series; and / or, the busbars 600 are electrically connected to the positive terminal of a solar cell string 100 and the positive terminal of an adjacent solar cell string 100 to connect the individual solar cell strings 100 in parallel.

[0156] In some embodiments, the busbar 600 is electrically connected to the wiring conductive structure 226 of the solar cell string 100. Specifically, the busbar 600 is electrically connected to the wiring conductive structure 226 electrically connected to the first conductive structure 221 of the solar cell string 100, and electrically connected to the wiring conductive structure 226 electrically connected to the second conductive structure 222 of the adjacent solar cell string 100; and / or, the busbar is electrically connected to the wiring conductive structure 226 electrically connected to the first conductive structure 221 of the solar cell string 100, and electrically connected to the wiring conductive structure 226 electrically connected to the first conductive structure 221 of the adjacent solar cell string 100.

[0157] like Figure 24 As shown, along the first direction, the busbar 600 includes end busbars 600 (such as busbar 600a and busbar 600c) and middle busbars 600 (such as busbar 600b) distributed at both ends of the solar cell module, with the first battery string group 1 and the second battery string group 2 on both sides of the middle busbar 600 respectively.

[0158] The first battery string group 1 is connected in series by the end busbar 600 at one end of the solar cell module and the middle busbar 600. The second battery string group 2 is connected in series by the end busbar 600 at the other end of the solar cell module and the middle busbar 600. Meanwhile, the middle busbar 600 also connects the first battery string group 1 and the second battery string group 2 in parallel.

[0159] As an example, as shown in Figure 24 , the solar cell module includes the first battery string group 1, which includes a plurality of solar cell strings 100 arranged along the second direction at intervals. The positive electrode of each solar cell string 100 is electrically connected to the negative electrode of the adjacent solar cell string 100 through the busbar 600. In this way, the first battery string group 1 forms a complete current loop to connect the plurality of solar cell strings 100 in series. Specifically, the first battery string group 1 includes the solar cell string 100a, the solar cell string 100b, the solar cell string 100c, the solar cell string 100d, the solar cell string 100e, and the solar cell string 100f arranged along the second direction at intervals in sequence. The busbar 600a electrically connects the positive electrode of the solar cell string 100a and the negative electrode of the solar cell string 100b, the busbar 600b electrically connects the positive electrode of the solar cell string 100b and the negative electrode of the solar cell string 100c, the busbar 600c electrically connects the positive electrode of the solar cell string 100c and the negative electrode of the solar cell string 100d, and so on. The other connection relationships are not described herein. In this way, the plurality of solar cell strings 100 in the first battery string group 1 are connected in series.

[0160] As an example, the solar cell module can also include the second battery string group 2, and the solar cell strings 100 of the second battery string group 2 are connected in series. For details, please refer to the first battery string group 1.

[0161] In some embodiments, as shown in Figure 21 and Figure 22 , the busbar 600 is located on the side of the conductive interconnection film 20 facing the solar cell 10, that is, the busbar 600 is on the same side as the solar cell 10. As an example, as shown in Figure 22 , the base film 21 at the position corresponding to the wiring conductive structure 226 of the conductive interconnection film 20 can be omitted.

[0162] In some embodiments, as shown in Figure 23 , the busbar 600 is located on the side of the conductive interconnection film 20 away from the solar cell 10, that is, the busbar 600 can also be on the side different from the solar cell 10. At this time, the busbar 600 is hidden on the back surface of the solar cell 10 (in the solar cell 10, the incident surface of light is defined as the front surface), which can reduce the area of the non-power generation area of the solar cell module, so as to improve the energy conversion efficiency of the solar cell module.

[0163] As an example, along the first direction, the orthographic projection of the base film 21 onto the solar cell string 100 lies within the end solar cell 10 of the solar cell string 100. Figure 23 As shown, taking one end of the solar cell string 100 as an example, the conductive wiring structure 226 has a bend, which is located on the surface of the base film 21 facing away from the solar cell 10. The busbar 600 is electrically connected to the bend of the conductive wiring structure 226. Specifically, the busbar 600 is located on the surface of the conductive wiring structure 226 facing away from the base film 21. Thus, the busbar 600 can be hidden on the rear surface of the solar cell 10.

[0164] In some embodiments, the solar cell module further includes a string of solar cells 100 having a shading member 40. The shading member 40 is located at least in the area of ​​the base film 21 facing the solar cells 10 and where no solar cells 10 are disposed. Since there are gaps between the solar cells 10, the conductive interconnect film 20 can be seen through the gaps on the front side of the solar cell module. The shading member 40 can block the color of the base film 21 and the conductive layer 22 in the gaps between adjacent solar cells 10, thereby optimizing the local color of the solar cell module.

[0165] As an example, such as Figure 12 , Figure 20 As shown, the shielding member 40 can be disposed in the second region 212 of the conductive interconnect film 20, and the third conductive structure 223 is located between the base film 21 and the shielding member 40.

[0166] As an example, the shielding member 40 may be a film attached to the conductive interconnect film 20 or a coating applied to the conductive interconnect film 20. The film or coating is insulating.

[0167] As an example, the color of the masking member 40 includes black.

[0168] In some embodiments, for the module-level conductive interconnect film 20, the gap between adjacent solar cell strings 100 may also expose the conductive interconnect film 20, so a shielding member 40 can also be provided between adjacent solar cell strings 100.

[0169] In some embodiments, the solar cell module further includes an encapsulation layer located on at least one side of the plurality of solar cell strings 100. For example... Figure 1 As shown, encapsulation layers are provided on both sides of the multiple solar cell strings 100. Specifically, the encapsulation layer located on one side of the multiple solar cell strings 100 is referred to as the first encapsulation layer 400; the encapsulation layer located on the other side of the multiple solar cell strings 100 is referred to as the second encapsulation layer 500. The solar cell strings 100 can be enclosed in the encapsulation layers, which can block moisture, oxygen, and other substances that are harmful to the solar cells 10 and the connecting circuits.

[0170] As an example, the first encapsulation layer 400 and the second encapsulation layer 500 may each be independently at least one selected from ethylene vinyl acetate copolymer (EVA), polyvinyl butyral, silicone resin, ester resin, and olefin resin. The embodiments of this disclosure are not limited to these materials.

[0171] In some embodiments, if light enters the solar cell 10 from the direction of the first encapsulation layer 400, the conductive interconnect film 20 is located between the plurality of solar cells 10 and the second encapsulation layer 500. The first encapsulation layer 400 is a light-transmitting material to allow light to reach the solar cell 10. The second encapsulation layer 500 can be a light-transmitting material or a non-light-transmitting material.

[0172] In some embodiments, the solar cell module also includes a cover plate located on the side of the encapsulation layer away from the plurality of solar cell strings 100. The cover plate protects the solar cells 10. Figure 1 As shown, the cover plate located on the side of the first encapsulation layer 400 away from the multiple solar cell strings 100 is designated as the first cover plate 200, and the cover plate located on the side of the second encapsulation layer 500 away from the multiple solar cell strings 100 is designated as the second cover plate 300.

[0173] In some embodiments, if light enters the solar cell 10 from the direction of the first cover plate 200, the first cover plate 200 is a light-transmitting material to allow light to reach the solar cell 10. The second cover plate 300 can be a light-transmitting material or a non-light-transmitting material. The light-transmitting material can be glass, a sheet or film made of light-transmitting resin, a flexible layer woven from light-transmitting fibers, etc. The non-light-transmitting material can be of the Tedlar / PET / Tedlar (TPT) type or can have a structure in which polyvinylidene fluoride (PVDF) resin is formed on at least one surface of polyethylene terephthalate (PET).

[0174] In some embodiments, the solar cell module sequentially includes a first cover plate 200, a first encapsulation layer 400, multiple solar cell strings 100, a second encapsulation layer 500, and a second cover plate 300. These layered structures can be encapsulated together using a lamination process. Frame ( Figure 1 (Not shown) is constructed in a shape that surrounds the solar cell module to provide structural protection for the laminate.

[0175] In a third aspect, this application provides a power generation device, including the solar cell module of the second aspect of this application. Using the aforementioned solar cell module, the power generation device has high energy conversion efficiency and can be used in applications requiring conductivity.

[0176] In a fourth aspect, this application provides an electrical device including a solar cell module as described in the second aspect of this application. The solar cell module can be used as a power source for the electrical device or as an energy storage unit. The electrical device can be, but is not limited to, mobile devices (e.g., mobile phones, laptops, etc.), electric vehicles (e.g., pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc.), electric trains, ships and satellites, energy storage systems, etc. As an example, the electrical device can be a pure electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle, etc. The electrical device includes a solar cell module. As an example, the electrical device can be a mobile phone, tablet computer, laptop computer, etc.

[0177] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A solar cell string with a shielding component, characterized in that, include: Multiple solar cells, each solar cell comprising: a cell body and an electrode layer located on one side of the cell body, the electrode layer comprising a first electrode and a second electrode spaced apart, the first electrode and the second electrode having opposite polarities; A conductive interconnect film is provided, wherein a plurality of solar cells are located on one side of the conductive interconnect film, and the conductive interconnect film is electrically connected to the plurality of solar cells; the conductive interconnect film includes: a base film, and a conductive layer located on the side of the base film facing the solar cells, the conductive layer including: a first conductive structure disposed and electrically connected to the first electrode, and a second conductive structure disposed and electrically connected to the second electrode; A shielding member, wherein the shielding member is located at least in the area on the side of the base film facing the solar cell and in which the solar cell is not disposed.

2. The solar cell string with a shielding member according to claim 1, characterized in that, The conductive layer further includes a third conductive structure; One end of the third conductive structure is electrically connected to the first electrode of the solar cell adjacent to one side of the third conductive structure through the first conductive structure, and the other end of the third conductive structure is electrically connected to the second electrode of the solar cell adjacent to the other side of the third conductive structure through the second conductive structure; the third conductive structure is located between the base film and the shielding member.

3. The solar cell string with a shielding member according to claim 1 or 2, characterized in that, The shielding component includes one or more of an insulating film layer and an insulating coating layer; and / or, The color of the shielding component includes black.

4. The solar cell string with a shielding member according to claim 1, characterized in that, It also includes an adhesive that is insulating, the adhesive being disposed in a region of the base film where the conductive layer is not disposed, and the adhesive being in contact with the base film and the battery body.

5. The solar cell string with a shielding member according to claim 4, characterized in that, The adhesive and the base film have a first contact surface, and the conductive layer and the electrode layer have a second contact surface. The distance between the first contact surface and the battery body is less than or equal to the sum of the distance between the second contact surface and the battery body and the thickness of the conductive layer. Optionally, the adhesive has a positive curing volume shrinkage rate; Optionally, the adhesive is an epoxy resin cured product, an organosilicon cured product, an acrylic resin cured product, a polyurethane cured product, or a hot melt adhesive cured product; Optionally, the adhesive is elastic; Optionally, the base film on which the adhesive is disposed has a protruding structure facing the battery body.

6. The solar cell string with a shielding member according to claim 4, characterized in that, The base film extends across the boundary of the first electrode and / or the second electrode of the solar cell and contacts the adhesive at an angle toward the solar cell. Optionally, the base film is flexible; Optionally, the thickness of the base film is 10 μm-5000 μm; Optionally, the base film is polyimide, polyethylene terephthalate, polyethylene naphthalate, liquid crystal display polymer, polyolefin, or ethylene-vinyl acetate copolymer.

7. The solar cell string with a shielding member according to claim 4, characterized in that, The first electrode, the second electrode adjacent to the first electrode, the battery body, the first conductive structure, the second conductive structure adjacent to the first conductive structure, and the base film form a receiving space, and the adhesive is located within the receiving space; Optionally, the adhesives within a single receiving space may be arranged continuously or at intervals.

8. The solar cell string with a shielding member according to claim 1, characterized in that, The plurality of solar cells are arranged along a first direction, the first electrode and / or the second electrode extend continuously or intermittently along the first direction, and the first electrode and the second electrode are arranged alternately along a second direction, wherein the first direction intersects the second direction.

9. The solar cell string with a shielding member according to claim 8, characterized in that, The first electrode includes a first bus electrode extending along the first direction, and a first finger electrode group intersecting and electrically connected to the first bus electrode; the first finger electrode group includes a plurality of first finger electrodes, which are spaced apart along the first direction; and / or, The second electrode includes a second bus electrode extending along the first direction, and a second finger electrode group that intersects with and is electrically connected to the second bus electrode; the second finger electrode group includes a plurality of second finger electrodes, which are spaced apart along the first direction.

10. The solar cell string with a shielding member according to claim 1, characterized in that, The conductive layer and the electrode layer are connected by a contact to form the electrical connection; and / or, the conductive layer and the electrode layer are connected by a conductive contact. Optionally, the first conductive structure and the first electrode are connected by a contact to form the electrical connection; and / or, the first conductive structure and the first electrode are connected by a conductive contact. Optionally, the second conductive structure and the second electrode are connected by a contact to form the electrical connection; and / or, the second conductive structure and the second electrode are connected by a conductive contact.

11. A solar cell module, characterized in that, It includes a plurality of solar cell strings with shading members arranged at intervals as described in any one of claims 1-10, wherein the shading members are located in the region between adjacent solar cell strings.

12. A power generation device, characterized in that, Includes the solar cell module as described in claim 11.

13. An electrical appliance, characterized in that, Includes the solar cell module as described in claim 11.

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