Solar cell module and manufacturing method thereof

Abstract

The invention relates to a solar cell module and a manufacturing method thereof. The solar cell module includes: a back sheet; the transparent carrier plate and the back plate are arranged at an interval; the edge sealing element is connected between the back plate and the transparent carrier plate in a sealing manner; the positive lead-out wire and the negative lead-out wire are respectively provided with a first part and a second part which are connected, and the first parts of the positive lead-out wire and the negative lead-out wire are positioned between the back plate and the transparent carrier plate and penetrate through the edge sealing element in a sealing manner; and the second parts of the positive lead-out wire and the negative lead-out wire extend out of the transparent support plate from the same side or two opposite sides of the transparent support plate. According to the solar cell module and the manufacturing method thereof, the service life is long.

Description

Technical Field

[0001] The present application relates to the technical field of solar cells, and particularly to a solar cell module and a manufacturing method thereof. Background Art

[0002] In recent years, the problems of global energy shortage and environmental pollution have become increasingly prominent. Solar cell modules, including solar cells, have received more and more attention as ideal renewable energy components. A solar cell, also known as a photovoltaic cell, is a device that directly converts light energy into electrical energy through the photovoltaic effect or the photochemical effect. It has rapidly achieved a relatively high photoelectric conversion efficiency in the years after its birth and has good application prospects.

[0003] With the development of solar cell technology, people have higher and higher requirements for the performance of solar cell modules, such as the efficiency, stability, service life, etc. of solar cell modules. The service life of traditional solar cell modules is relatively short. Therefore, how to improve the performance of solar cell modules and extend the service life of solar cell modules has become an urgent problem to be solved. Summary of the Invention

[0004] Based on this, it is necessary to provide a solar cell module with a relatively long service life and a manufacturing method thereof in view of the above problems.

[0005] A solar cell module includes a solar cell, and the solar cell includes:

[0006] A backplane;

[0007] A transparent carrier plate, which is arranged at an interval from the backplane;

[0008] An edge sealing element, which is hermetically connected between the backplane and the transparent carrier plate; and

[0009] A positive lead-out wire and a negative lead-out wire, both of which have a connected first part and a second part. The first parts of the positive lead-out wire and the negative lead-out wire are both located between the backplane and the transparent carrier plate and hermetically pass through the edge sealing element, and the second parts of the positive lead-out wire and the negative lead-out wire extend out of the transparent carrier plate from the same side or opposite sides of the transparent carrier plate.

[0010] In some embodiments, the solar cell module further includes a junction box;

[0011] When the second parts of the positive lead-out wire and the negative lead-out wire extend out of the transparent carrier plate from the same side of the transparent carrier plate, there is one junction box, which simultaneously covers at least part of the second parts of the positive lead-out wire and the negative lead-out wire and is electrically connected to the second parts of the positive lead-out wire and the negative lead-out wire;

[0012] When the second parts of the positive electrode lead-out wire and the negative electrode lead-out wire extend out of the transparent carrier plate from opposite sides of the transparent carrier plate, there are two junction boxes. One of the junction boxes covers at least part of the second part of the positive electrode lead-out wire and is electrically connected to the second part of the positive electrode lead-out wire, and the other junction box covers at least part of the second part of the negative electrode lead-out wire and is electrically connected to the second part of the negative electrode lead-out wire.

[0013] In some embodiments, the second parts of the positive electrode lead-out wire and the negative electrode lead-out wire both include a first segment and a second segment connected to each other; in the same positive electrode lead-out wire or negative electrode lead-out wire, the first segment extends in a direction away from the transparent carrier plate, and the second segment is bent relative to the first segment to the surface of the back plate facing away from the transparent carrier plate.

[0014] When there is one junction box, the junction box covers at least part of the second segments of the positive electrode lead-out wire and the negative electrode lead-out wire, as well as the first segments of the positive electrode lead-out wire and the negative electrode lead-out wire, and is electrically connected to the second segments of the positive electrode lead-out wire and the negative electrode lead-out wire.

[0015] When there are two junction boxes, one of the junction boxes covers at least part of the second segment of the positive electrode lead-out wire and the first segment of the positive electrode lead-out wire, and is electrically connected to the second segment of the positive electrode lead-out wire, and the other junction box covers at least part of the second segment of the negative electrode lead-out wire and the first segment of the negative electrode lead-out wire, and is electrically connected to the second segment of the negative electrode lead-out wire.

[0016] In some embodiments, when there is one junction box, the junction box includes a wiring bracket, a positive electrode wiring head, and a negative electrode wiring head; the wiring bracket includes a substrate, a protective plate, and a wiring frame.

[0017] The substrate has a hollowed-out portion. The substrate is disposed on the surface of the back plate facing away from the transparent carrier plate and simultaneously covers part of the second segments of the positive electrode lead-out wire and the negative electrode lead-out wire; the protective plate is located at one end of the substrate and is bent relative to the substrate to the side of the substrate facing the back plate, and simultaneously covers the first segments of the positive electrode lead-out wire and the negative electrode lead-out wire.

[0018] The wiring frame is disposed on a side of the substrate facing away from the back plate and is aligned with the hollow portion. The positive terminal and the negative terminal are both disposed within the wiring frame. The remaining portion of the second section of the positive lead is exposed within the hollow portion and contacts the positive terminal. The remaining portion of the second section of the negative lead is exposed within the hollow portion and contacts the negative terminal.

[0019] In some embodiments, the solar cell module further includes a diode. The diode is located within the wiring frame and is connected in parallel and reversely between the positive terminal and the negative terminal.

[0020] In some embodiments, when there are two junction boxes, one of the junction boxes includes a wiring bracket and a positive terminal, and the other junction box includes the wiring bracket and a negative terminal. The wiring bracket includes a substrate, a protective plate, and a wiring frame.

[0021] The substrate has a hollow portion. The substrate is disposed on a surface of the back plate facing away from the transparent carrier plate. The protective plate is located at one end of the substrate and is bent relative to the substrate to the side of the substrate facing the back plate. The wiring frame is disposed on a side of the substrate facing away from the back plate and is aligned with the hollow portion.

[0022] In one of the junction boxes, the substrate covers a part of the second section of the positive lead, the protective plate covers the first section of the positive lead, the positive terminal is disposed within the wiring frame, and the remaining portion of the second section of the positive lead is exposed within the hollow portion and contacts the positive terminal.

[0023] In the other junction box, the substrate covers a part of the second section of the negative lead, the protective plate covers the first section of the negative lead, the negative terminal is disposed within the wiring frame, and the remaining portion of the second section of the negative lead is exposed within the hollow portion and contacts the negative terminal.

[0024] In some embodiments, the solar cell module further includes a positive sealing element and a negative sealing element. The positive sealing element is used to seal the gap between the second part of the positive lead and the junction box. The negative sealing element is used to seal the gap between the second part of the negative lead and the junction box.

[0025] In some embodiments, both the positive sealing element and the negative sealing element are in a glue layer structure. The positive sealing element is adhesively bonded between the positive lead and the junction box. The negative sealing element is adhesively bonded between the negative lead and the junction box.

[0026] In some of the embodiments, when there is one junction box, a positive limiting groove for limiting the positive sealing element and a negative limiting groove for limiting the negative sealing element are formed on the junction box;

[0027] When there are two junction boxes, a positive limiting groove for limiting the positive sealing element is formed on one of the junction boxes, and a negative limiting groove for limiting the negative sealing element is formed on the other junction box.

[0028] In some of the embodiments, the edge sealing element is a butyl rubber layer.

[0029] A manufacturing method of a solar cell module, the manufacturing method of the solar cell module comprising:

[0030] Providing an edge sealing element on one side of a transparent carrier plate;

[0031] Providing a first portion of a positive lead-out wire and a negative lead-out wire on the same side of the transparent carrier plate where the edge sealing element is provided, and both the first portion of the positive lead-out wire and the first portion of the negative lead-out wire are hermetically passed through the edge sealing element, and extending a second portion of the positive lead-out wire and the second portion of the negative lead-out wire out of the transparent carrier plate from the same side or opposite sides of the transparent carrier plate;

[0032] Laminating a back plate with the transparent carrier plate so that the first portion of the positive lead-out wire and the negative lead-out wire, and the edge sealing element are located between the back plate and the transparent carrier plate, and laminating the back plate and the transparent carrier plate so that the edge sealing element is hermetically connected between the back plate and the transparent carrier plate.

[0033] In some of the embodiments, the manufacturing method of the solar cell module further comprises:

[0034] When the second portions of the positive lead-out wire and the negative lead-out wire extend out of the transparent carrier plate from the same side of the transparent carrier plate, providing one junction box to cover at least a part of the second portions of the positive lead-out wire and the negative lead-out wire, and being electrically connected to the second portions of the positive lead-out wire and the negative lead-out wire;

[0035] When the second portions of the positive lead-out wire and the negative lead-out wire extend out of the transparent carrier plate from opposite sides of the transparent carrier plate, providing one junction box to cover at least a part of the second portion of the positive lead-out wire, and being electrically connected to the second portion of the positive lead-out wire, and providing another junction box to cover at least a part of the second portion of the negative lead-out wire, and being electrically connected to the second portion of the negative lead-out wire.

[0036] In some of these embodiments, the method for manufacturing a solar cell module further includes:

[0037] Bending the second portions of the positive electrode lead-out wire and the negative electrode lead-out wire, and causing the second portions of the positive electrode lead-out wire and the negative electrode lead-out wire to each form a first segment extending in a direction away from the transparent carrier plate, and a second segment that is bent relative to the first segment to the surface of the back plate facing away from the transparent carrier plate;

[0038] Providing a junction box to cover at least a portion of the second portions of the positive electrode lead-out wire and the negative electrode lead-out wire, and being electrically connected to the second portions of the positive electrode lead-out wire and the negative electrode lead-out wire, including:

[0039] Providing a junction box to cover at least a portion of the second segments of the positive electrode lead-out wire and the negative electrode lead-out wire, as well as the first segments of the positive electrode lead-out wire and the negative electrode lead-out wire, and being electrically connected to the second segments of the positive electrode lead-out wire and the negative electrode lead-out wire;

[0040] Providing a junction box to cover at least a portion of the second portion of the positive electrode lead-out wire and being electrically connected to the second portion of the positive electrode lead-out wire, and providing another junction box to cover at least a portion of the second portion of the negative electrode lead-out wire and being electrically connected to the second portion of the negative electrode lead-out wire, including:

[0041] Providing a junction box to cover at least a portion of the second segment of the positive electrode lead-out wire, as well as the first segment of the positive electrode lead-out wire, and being electrically connected to the second segment of the positive electrode lead-out wire; providing another junction box to cover at least a portion of the second segment of the negative electrode lead-out wire, as well as the first segment of the negative electrode lead-out wire, and being electrically connected to the second segment of the negative electrode lead-out wire.

[0042] In some of these embodiments, the method for manufacturing a solar cell module further includes:

[0043] Providing a positive electrode sealing element to seal the gap between the second portion of the positive electrode lead-out wire and the junction box, and providing a negative electrode sealing element to seal the gap between the second portion of the negative electrode lead-out wire and the junction box.

[0044] In the above-mentioned solar cell module and its manufacturing method, the positive electrode lead-out wire and the negative electrode lead-out wire are led out from the same side or opposite sides of the transparent carrier plate, avoiding the problem of water vapor intrusion at the opening position. Moreover, considering that the area to be sealed by the edge sealing element is relatively large, in order to reduce the probability of water vapor and oxygen intrusion into the solar cell, the edge sealing element itself needs to be made of a material with better water and gas barrier properties than the traditional glue film and glue for filling the opening. Combining with the fact that the second part of the positive electrode lead-out wire and the negative electrode lead-out wire is sealed through the edge sealing element, the probability of external water vapor and oxygen invading into the solar cell through the gaps between the positive electrode lead-out wire and the edge sealing element and between the negative electrode lead-out wire and the edge sealing element is further reduced, thereby greatly reducing the probability of contact between water vapor and oxygen and the solar cell device, meeting the packaging requirements of the solar cell, and extending the service life of the solar cell and the solar cell module. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 FIG. is a schematic structural diagram of a solar cell module in some embodiments of the present application.

[0046] Figure 2 For Figure 1 the top view of the solar cell module shown.

[0047] Figure 3 For Figure 1 the sectional view of the solar cell module shown along the A-A direction.

[0048] Figure 4 For Figure 1 the schematic structural diagram of the solar cell in the solar cell module shown.

[0049] Figure 5 For Figure 4 the schematic structural diagram of the solar cell shown after removing the backplane.

[0050] Figure 6 For Figure 5 the sectional view of the solar cell shown along the B-B direction.

[0051] Figure 7 For Figure 6 the enlarged schematic diagram of the partial structure C in the solar cell shown.

[0052] Figure 8 For Figure 1 the schematic structural diagram of the junction box in the solar cell module shown.

[0053] Figure 9 For Figure 8 the bottom view of the junction box shown.

[0054] Figure 10It is a schematic structural diagram of a solar cell power generation system.

[0055] Figure 11 It is a schematic structural diagram of a solar cell module in some other embodiments of the present application.

[0056] Figure 12 It is Figure 11 A sectional view of the solar cell module shown along the D-D direction.

[0057] Figure 13 It is Figure 11 A schematic structural diagram of the solar cell in the solar cell module shown.

[0058] Figure 14 It is Figure 13 A schematic structural diagram of the solar cell shown after removing the backplane.

[0059] Figure 15 It is Figure 14 A sectional view of the solar cell shown along the E-E direction.

[0060] Figure 16 It is Figure 15 An enlarged schematic diagram of the local structure F in the solar cell shown.

[0061] Figure 17 It is Figure 11 A schematic structural diagram of the junction box in the solar cell module shown.

[0062] Figure 18 It is Figure 17 A bottom view of the junction box shown.

[0063] Figure 19 It is a schematic flow diagram of the manufacturing method of a solar cell module in some embodiments of the present application.

[0064] Figure 20 It is a schematic flow diagram of the manufacturing method of a solar cell module in some other embodiments of the present application.

[0065] Reference numerals in the drawings:

[0066] 1. Solar cell module;

[0067] 10. Solar cell; 20. Junction box; 30. Diode;

[0068] 11. Backplane; 12. Transparent carrier plate; 13. Edge sealing element; 14. Positive lead-out wire; 141. First part; 142. Second part; 142a. First section; 142b. Second section; 15. Negative lead-out wire; 16. Solar cell device; 17. Positive lead; 18. Negative lead;

[0069] 21. Wiring bracket; 211. Substrate; 211a. Hollowed-out part; 212. Protective plate; 213. Wiring frame; 22. Positive wiring terminal; 23. Negative wiring terminal; 24. Positive limiting groove; 25. Negative limiting groove. Detailed implementation mode

[0070] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation mode of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0071] In addition, if the terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "a plurality" appears, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0072] In the present application, unless otherwise clearly specified and limited, if terms such as "installation", "connection", "connection", "fixation", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0073] In the present application, unless otherwise clearly specified and limited, if a description such as a first feature being "above" or "below" a second feature appears, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0074] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0075] Please refer to Figure 1 and Figure 11 , this application provides a solar cell module 1, and the solar cell module 1 includes a solar cell 10. Among them, the solar cell 10 can be, but is not limited to, a crystalline silicon solar cell, a cadmium telluride solar cell, a copper indium gallium tin solar cell, a perovskite solar cell, an organic solar cell, etc. For the convenience of description, the following embodiments will all take the solar cell as a perovskite solar cell as an example for description.

[0076] Please refer to Figures 4 to 7 , and Figures 13 to 16 , the solar cell 10 includes a back plate 11, a transparent carrier plate 12, an edge sealing element 13, a solar cell device 16, a positive lead 14 and a negative lead 15. The transparent carrier plate 12 is disposed at an interval from the back plate 11. The edge sealing element 13 is hermetically connected between the back plate 11 and the transparent carrier plate 12. The solar cell device 16 is located between the back plate 11 and the transparent carrier plate 12. Both the positive lead 14 and the negative lead 15 have a connected first part 141 and a second part 142. The first parts 141 of the positive lead 14 and the negative lead 15 are both located between the back plate 11 and the transparent carrier plate 12 and are electrically connected to the solar cell device 16, and the first parts 141 of the positive lead 14 and the negative lead 15 hermetically pass through the edge sealing element 13. The second parts 142 of the positive lead 14 and the negative lead 15 extend out of the transparent carrier plate 12 from the same side or opposite sides of the transparent carrier plate 12.

[0077] The back plate 11 refers to the plate member of the solar cell 10 that is disposed facing away from the sun. The back plate 11 can be made of insulating materials such as glass and plastic.

[0078] The transparent carrier plate 12 refers to the transparent plate member of the solar cell 10 that is disposed facing the sun. Exemplarily, the transparent carrier plate 12 can be a plate member made of transparent materials such as glass and polyethylene terephthalate.

[0079] The edge sealing element 13 refers to an element that adheres to the back plate 11 and the transparent carrier plate 12 and is used to seal the back plate 11 and the transparent carrier plate 12 to jointly define a sealed accommodation space with the back plate 11 and the transparent carrier plate 12. Exemplarily, the edge sealing element 13 can be a glue layer structure, a gasket structure, etc. Taking the edge sealing element 13 as a glue layer structure as an example, the edge sealing element 13 can be an epoxy encapsulation glue, a silicone encapsulation glue, a polyurethane encapsulation glue, an ultraviolet light-curing encapsulation glue, an ethylene-vinyl acetate copolymer, polyvinyl butyral, an ethylene-octene copolymer, polyisobutylene, and a polyolefin encapsulation glue, etc. The edge sealing element 13 is a closed frame type and seals the edges of the back plate 11 and the transparent carrier plate 12.

[0080] Preferably, the edge sealing element 13 is a butyl glue layer, and the butyl glue layer can directly bond the back plate 11 and the transparent carrier plate 12. In addition, the butyl glue layer has excellent water and gas barrier properties. Using the butyl glue layer to seal the gap between the back plate 11 and the transparent carrier plate 12, the probability of water vapor and oxygen permeation is extremely low, meeting the encapsulation requirements of the solar cell 10.

[0081] When the edge sealing element 13 is a glue layer structure, as an example, after the edge sealing element 13 is coated on the transparent carrier plate 12 and before it is cured, the first part 141 of the positive electrode lead-out wire 14 and the first part 141 of the negative electrode lead-out wire 15 are set to pass through the edge sealing element 13. Since the edge sealing element 13 has a certain fluidity at this time, the edge sealing element 13 can better wrap the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and then the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are sealed after curing.

[0082] As an example, it can also be set that the edge sealing element 13 includes N sub-glue layers. After applying less than N sub-glue layers on the transparent carrier plate 12, the first part 141 of the positive electrode lead-out wire 14 and the first part 141 of the negative electrode lead-out wire 15 are set on the sub-glue layer farthest from the transparent carrier plate 12, and then sub-glue layers are continuously applied on this sub-glue layer until the sub-glue layer reaches N layers. When each sub-glue layer is cured, the edge sealing element 13 can also wrap the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are sealed after curing.

[0083] In this way, the probability that water vapor and oxygen enter the accommodation space through the gaps between the edge sealing element 13 and the first part 141 of the positive electrode lead-out wire 14 and between the edge sealing element 13 and the first part 141 of the negative electrode lead-out wire 15 and contact the solar cell device 16 is reduced, extending the service life of the solar cell 10 and the solar cell module 1.

[0084] The positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are intermediate components for realizing the electrical connection between the solar cell device 16 and the storage battery in the photovoltaic power generation system. Specifically, the second part 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extends out of the transparent carrier plate 12 from one side or opposite sides of the transparent carrier plate 12 along its own width direction.

[0085] In this application, component A 1 and component A 2 of A 3 part can be understood as component A 1 of A 3 part and component A 2 of A 3 part.

[0086] The solar cell device 16 is a component in the solar cell 10 that undergoes a photoelectric reaction with light. Taking the solar cell 10 as a perovskite solar cell as an example, the solar cell device 16 includes a hole transport layer, a light absorption layer, and an electron transport layer that are stacked. Among them, the setting manners of the hole transport layer, the light absorption layer, and the electron transport layer are conventional techniques in the art, so they will not be elaborated here.

[0087] The solar cell device 16 is sealed in the accommodation space to reduce the interference of external water vapor and oxygen on the operation of the solar cell device 16.

[0088] In addition, the solar cell 10 further includes a positive electrode lead 17 and a negative electrode lead 18, and the positive bus bar and the negative electrode lead 18 are located in the accommodation space. The positive electrode lead 17 is connected between the solar cell device 16 and the first part 141 of the positive electrode lead-out wire 14 to realize the electrical connection between the positive electrode lead-out wire 14 and the solar cell 10; the negative electrode lead 18 is connected between the solar cell device 16 and the first part 141 of the negative electrode lead-out wire 15 to realize the electrical connection between the negative electrode lead-out wire 15 and the solar cell 10.

[0089] When the first parts 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are both located between the back plate 11 and the transparent carrier plate 12, one end of the first part 141 of the positive electrode lead-out wire 14 is located in the accommodation space, and this end is electrically connected to the solar cell device 16 through the positive electrode lead 17. The other end of the first part 141 of the positive electrode lead-out wire 14 is hermetically passed through the edge sealing element 13 and connected to the second part 142 of the positive electrode lead-out wire 14. Similarly, at this time, one end of the first part 141 of the negative electrode lead-out wire 15 is located in the accommodation space, and this end is electrically connected to the solar cell device 16 through the negative electrode lead 18. The other end of the first part 141 of the negative electrode lead-out wire 15 is hermetically passed through the edge sealing element 13 and connected to the second part 142 of the negative electrode lead-out wire 15.

[0090] In the conventional technology, holes are usually formed in the backplane 11, and the positive lead-out wire 14 and the negative lead-out wire 15 are led out through the holes in the backplane 11. The hole positions are generally filled with a film (such as ethylene-vinyl acetate copolymer, commonly known as EVA, polyethylene octene co-elastic body, commonly known as POE) or glue (silicone, epoxy resin), etc. Due to the weak water resistance and gas barrier properties of the film and glue, the solar cell 10 is still vulnerable to the intrusion of external water vapor, oxygen, etc., and ultimately causes the solar cell 10 to decay and fail during the warranty period.

[0091] In the present application, the positive lead-out wire 14 and the negative lead-out wire 15 are led out from the same side or opposite sides of the transparent carrier plate 12, avoiding the problem of water vapor intrusion at the hole positions. Moreover, considering that the area to be sealed by the edge sealing element 13 is relatively large, in order to reduce the probability of water vapor and oxygen intrusion into the solar cell 10, the edge sealing element 13 itself needs to be made of a material with better water resistance and gas barrier properties than the conventional film and glue for filling the holes. Coupled with the fact that the first part 141 of the positive lead-out wire 14 and the negative lead-out wire 15 is hermetically passed through the edge sealing element 13, the probability of external water vapor and oxygen invading into the solar cell 10 through the gaps between the positive lead-out wire 14 and the edge sealing element 13 and between the negative lead-out wire 15 and the edge sealing element 13 is further reduced, thereby greatly reducing the probability of water vapor and oxygen contacting the solar cell device 16, meeting the packaging requirements of the solar cell 10, and extending the service life of the solar cell 10 and the solar cell module 1.

[0092] In addition, since the second parts 142 of the positive lead-out wire 14 and the negative lead-out wire 15 are led out from the same side or opposite sides of the transparent carrier plate 12, there is no need to form holes in the backplane 11, reducing the manufacturing steps of the solar cell 10 and facilitating the reduction of the manufacturing cost and production efficiency of the solar cell 10.

[0093] Please refer to again Figures 1 to 3 、 Figures 5 to 7 , Figures 11 to 12 , Figures 14 to 16 。

[0094] In some embodiments of the present application, the solar cell module 1 further includes a junction box 20. When the second parts 142 of the positive lead-out wire 14 and the negative lead-out wire 15 extend out of the transparent carrier plate 12 from the same side of the transparent carrier plate 12, there is one junction box 20 that simultaneously covers at least part of the second parts 142 of the positive lead-out wire 14 and the negative lead-out wire 15 and is electrically connected to the second parts 142 of the positive lead-out wire 14 and the negative lead-out wire 15.

[0095] When the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from opposite sides of the transparent carrier plate 12, there are two junction boxes 20. One of the junction boxes 20 covers at least part of the second part 142 of the positive electrode lead-out wire 14 and is electrically connected to the second part 142 of the positive electrode lead-out wire 14. The other junction box 20 covers at least part of the second part 142 of the negative electrode lead-out wire 15 and is electrically connected to the second part 142 of the negative electrode lead-out wire 15.

[0096] In this application, component A 0 Simultaneously covering component A 1 And component A 2 Of A 3 At least part of the part can be understood as: component A 0 Simultaneously covering component A 1 Of A 3 All of the part and component A 2 Of A 3 All of the part, or, component A 0 Simultaneously covering component A 1 Of A 3 Part of the part and component A 2 Of A 3 Part of the part.

[0097] For example, when there is one junction box 20, the junction box 20 can simultaneously cover all of the second part 142 of the positive electrode lead-out wire 14 and all of the second part 142 of the negative electrode lead-out wire 15; or, it can also simultaneously cover part of the second part 142 of the positive electrode lead-out wire 14 and part of the second part 142 of the negative electrode lead-out wire 15, which can be specifically set according to needs.

[0098] The junction box 20 is used to realize the electrical connection between the solar cell 10 in this group and the storage battery and / or other solar cell components 1 in the photovoltaic power generation system. Taking the junction box 20 being used to realize the electrical connection between the solar cell 10 in this group and the storage battery and there being one junction box 20 as an example, the storage battery has a positive electrode and a negative electrode. In this embodiment, both between the positive electrode of the storage battery and the positive electrode lead-out wire 14 and between the negative electrode of the storage battery and the negative electrode lead-out wire 15 are electrically connected through the same junction box 20.

[0099] When there are two junction boxes 20, the positive electrode of the storage battery is electrically connected to the positive electrode lead-out wire 14 through one of the junction boxes 20 covering the second part 142 of the positive electrode lead-out wire 14, and the negative electrode of the storage battery is electrically connected to the negative electrode lead-out wire 15 through the other junction box 20 covering the second part 142 of the negative electrode lead-out wire 15.

[0100] If the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are directly exposed to the outside, it is easy to cause mechanical damage to the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 by the outside, and further cause an open circuit between the positive electrode lead-out wire 14 and the solar cell 10 in the storage battery or other groups of solar cell modules 1 electrically connected thereto, and between the negative electrode lead-out wire 15 and the solar cell 10 in the storage battery or other groups of solar cell modules 1 electrically connected thereto, resulting in the solar cell 10 being unable to work properly.

[0101] In the present application, when there is one junction box 20, at least part of the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are covered by the junction box 20 at the same time. When there are two junction boxes 20, one junction box 20 covers at least part of the second part 142 of the positive electrode lead-out wire 14, and the other junction box 20 covers at least part of the second part 142 of the negative electrode lead-out wire 15. The junction box 20 can protect the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, reduce the risk of damage to the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and improve the working reliability of the solar cell 10 and the solar cell module 1.

[0102] Moreover, since the junction box 20 can block at least part of the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and at least part of the edge sealing element 13, the junction box 20 also has a certain blocking effect on external water vapor and oxygen. It is beneficial to reduce the possibility of external water vapor and oxygen contacting and corroding the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and is beneficial to preventing water vapor and oxygen from invading the inside of the solar cell 10, playing a good role in sealing the solar cell 10 and ensuring the working reliability of the solar cell 10.

[0103] In addition, it is worth mentioning that when the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from the same side of the transparent carrier plate 12, only one junction box 20 needs to be provided. The number of junction boxes 20 is small, which is convenient for reducing the manufacturing cost of the solar cell module 1.

[0104] Furthermore, in some embodiments of the present application, the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 both include a first section 142a and a second section 142b connected to each other; in the same positive electrode lead-out wire 14 or negative electrode lead-out wire 15, the first section 142a extends in a direction away from the transparent carrier plate 12, and the second section 142b is bent relative to the first section 142a to the surface of the back plate 11 facing away from the transparent carrier plate 12.

[0105] When there is one junction box 20, the junction box 20 covers at least part of the second section 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, as well as the first section 142a of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and is electrically connected to the second section 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15.

[0106] When there are two junction boxes 20, one of the junction boxes 20 covers at least part of the second section 142b of the positive electrode lead-out wire 14, as well as the first section 142a of the positive electrode lead-out wire 14, and is electrically connected to the second section 142b of the positive electrode lead-out wire 14. The other junction box 20 covers at least part of the second section 142b of the negative electrode lead-out wire 15, as well as the first section 142a of the negative electrode lead-out wire 15, and is electrically connected to the second section 142b of the negative electrode lead-out wire 15.

[0107] When the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from the same side of the transparent carrier plate 12, the first sections 142a of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are both attached to the same side surface of the back plate 11 arranged along its own width direction. When the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from opposite sides of the transparent carrier plate 12, the first section 142a of the positive electrode lead-out wire 14 is attached to one side surface of the back plate 11 arranged along its own width direction, and the first section 142a of the negative electrode lead-out wire 15 is attached to the other side surface of the back plate 11 arranged along its own width direction. The second sections 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are both folded to the side of the back plate 11 facing away from the transparent carrier plate 12 and are attached to the back plate 11.

[0108] The junction box 20 covers the first sections 142a of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 at the same time. Moreover, the junction box 20 covers at least part of the second sections 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 at the same time. The junction box 20 can not only block the mechanical damage of the outside world to the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, but also block water vapor and oxygen, reduce the probability of water vapor and oxygen contacting the positive electrode lead-out wire 14, the negative electrode lead-out wire 15 and invading the interior to contact the solar cell device 16, and prolong the service life of the solar cell 10 and the solar cell module 1.

[0109] In addition, since the area of the surface of the back plate 11 facing away from the transparent carrier plate 12 is large, when the second sections 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are bent on this surface, the junction box 20 has a more flexible setting position on this surface to electrically connect with the second sections 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15.

[0110] Please continue to refer to Figures 1 to 8, Further, in some embodiments of the present application, when there is one junction box 20, the junction box 20 includes a wiring bracket 21, a positive terminal 22 and a negative terminal 23; the wiring bracket 21 includes a substrate 211, a protective plate 212 and a wiring frame 213. The substrate 211 has a hollow portion 211a, and the substrate 211 is disposed on the surface of the back plate 11 facing away from the transparent carrier plate 12, and simultaneously covers a part of the positive lead 14 and the second section 142b of the negative lead 15; the protective plate 212 is located at one end of the substrate 211 and is bent relative to the substrate 211 to the side of the substrate 211 facing the back plate 11, and simultaneously covers the first section 142a of the positive lead 14 and the negative lead 15.

[0111] The wiring frame 213 is disposed on the side of the substrate 211 facing away from the back plate 11 and is aligned with the hollow portion 211a. The positive terminal 22 and the negative terminal 23 are both disposed within the wiring frame 213. The remaining portion of the second section 142b of the positive lead 14 is exposed within the hollow portion 211a and contacts the positive terminal 22, and the remaining portion of the second section 142b of the negative lead 15 is exposed within the hollow portion 211a and contacts the negative terminal 23.

[0112] In the present application, component A 0 Simultaneously covering component A 1 And component A 2 Of A 3 Part can be understood as: Component A 0 Covering component A 1 Of A 3 Part and component A 2 Of A 3 Part. Component A 0 Simultaneously covering component A 1 And component A 2 Of A 3 Part of the part can be understood as: Component A 0 Covering component A 1 Of A 3 Part of the part, and component A 2 Of A 3 Part of the part. Component A 1 And component A 2 Of A 3 Part of the part can be understood as component A 1 Of A 3 Part of the part and component A 2 Of A 3 Part of the part. Component A 1 And component A 2 Of A 3 The remaining part of the part can be understood as component A 1 Of A 3The remainder of the part and Component A 2 of A 3 The remainder of the part.

[0113] For example, the substrate 211 covers the second section 142b of both the positive electrode lead 14 and the negative electrode lead 15 at the same time. It can be understood that the substrate 211 covers the second section 142b of the positive electrode lead 14 and the second section 142b of the negative electrode lead 15.

[0114] As an example, the substrate 211, the protective plate 212, and the wiring frame 213 are all made of insulating materials, and the positive electrode terminal 22 and the negative electrode terminal 23 are both made of conductive materials.

[0115] To fix the junction box 20 to the backplane 11, a fixing adhesive can be applied in a circle on the surface edge of the substrate 211 facing the backplane 11, and the fixing adhesive is cured to achieve the fixation between the junction box 20 and the backplane 11.

[0116] The protective plate 212 is located at one end of the substrate 211 and is bent relative to the substrate 211 to the side of the substrate 211 facing the backplane 11, so that the protective plate 212 and the substrate 211 can form an L shape. Specifically, the length of the substrate 211 is greater than the length of the protective plate 212. The protective plate 212 can cover at least part of the second part 142 of the positive electrode lead 14 and the negative electrode lead 15, and can also cover at least part of the edge sealing element 13.

[0117] Preferably, the protective plate 212 extends to the end face away from the substrate 211 to be flush with the surface of the transparent carrier plate 12 facing away from the backplane 11. In this way, the protective plate 212 can achieve a better sealing effect, can block water vapor and oxygen from entering the solar cell 10 from the side where the protective plate 212 is located, and thus further improves the working reliability of the solar cell 10.

[0118] The wiring frame 213 is a structure with openings at both ends, and the openings of the wiring frame 213 are aligned with the hollowed-out part 211a. Positive electrode jacks and negative electrode jacks are provided on the side walls of the wiring frame 213. The positive electrode terminal 22 and the negative electrode terminal 23 are both located inside the wiring frame 213. One end of the positive electrode terminal 22 is inserted into the positive electrode jack and is electrically connected to the positive electrode of the storage battery. The other end of the positive electrode terminal 22 contacts the second section 142b of the positive electrode lead 14 exposed in the hollowed-out part 211a. In this way, the positive electrode lead 14 is electrically connected to the positive electrode of the storage battery through the positive electrode terminal 22. One end of the negative electrode terminal 23 is inserted into the negative electrode jack and is electrically connected to the negative electrode of the storage battery. The other end of the negative electrode terminal 23 contacts the second section 142b of the negative electrode lead 15 exposed in the hollowed-out part 211a. In this way, the negative electrode lead 15 is electrically connected to the negative electrode of the storage battery through the negative electrode terminal 23.

[0119] After the positive terminal 22 contacts the positive lead wire 14 and the negative terminal 23 contacts the negative lead wire 15, glue is poured into the wiring frame 213 and cured to encapsulate the junction box 20, so as to achieve insulation and sealing of the positive lead wire 14 and the negative lead wire 15 from the outside.

[0120] As an example, but not limited to, butyl rubber, ethylene vinyl acetate (EVA), polyolefin elastomer (POE), epoxy resin, polyurethane, silicone rubber, etc. can be poured into the wiring frame 213; the curing process includes, but is not limited to, room temperature curing, high temperature curing, ultraviolet curing, etc. according to the glue filling material;

[0121] It can be understood that in this embodiment, the protective plate 212 of the junction box 20 covers the first section 142a of the positive lead wire 14 and the negative lead wire 15, the substrate 211 and the positive terminal 22 jointly cover the second section 142b of the positive lead wire 14, and the substrate 211 and the negative terminal 23 jointly cover the second section 142b of the negative lead wire 15.

[0122] The junction box 20 designed in this embodiment can reduce the damage of the outside world to the positive lead wire 14 and the negative lead wire 15, and can block the probability of water vapor and oxygen contacting the positive lead wire 14 and the negative lead wire 15. Moreover, it also weakens the possibility of outside water vapor and oxygen invading the inside of the solar cell 10 from the side where the protective plate 212 is located, further extending the service life of the solar cell 10 and the solar cell module 1.

[0123] Please refer to Figure 2 and Figure 10 Furthermore, in some embodiments of the present application, the solar cell module 1 further includes a diode 30, the diode 30 is located in the wiring frame 213, and the diode 30 is connected in parallel and reversely connected between the positive terminal 22 and the negative terminal 23.

[0124] The diode 30 is reversely connected between the positive terminal 22 and the negative terminal 23 means that the positive electrode of the diode 30 is connected to the negative terminal 23, and the negative electrode of the diode 30 is connected to the positive terminal 22.

[0125] The diode 30 has a one-way conduction function. When the forward voltage is applied to the diode 30, the diode 30 conducts and forms a short circuit between the positive terminal 22 and the negative terminal 23. When the reverse voltage is applied to the diode 30, the diode 30 is cut off, and the positive terminal 22 and the negative terminal 23 normally output current.

[0126] Generally, in a photovoltaic power generation system, the photovoltaic power generation system includes a storage battery and multiple solar cell modules 1. The solar cell module 1 includes solar cells 10. The storage battery and the solar cells 10 in each solar cell module 1 are connected in series in turn to form a closed loop.

[0127] Among them, in the photovoltaic power generation system, a diode 30 can be provided in the junction box 20 of each solar cell module 1, or a diode 30 can also be provided in the junction box 20 of some solar cell modules 1 (for example, a group of solar cell modules 1), which can be specifically set according to needs.

[0128] Take Figure 10 the photovoltaic power generation system including two solar cell modules 1 as an example. The positive terminal connection head 22 of the junction box 20 in the left solar cell module 1 is connected in series with the positive pole of the storage battery, and the negative terminal connection head 23 of the junction box 20 of the right solar cell module 1 is connected in series with the negative pole of the storage battery. Moreover, the negative terminal connection head 23 of the junction box 20 in the left solar cell module 1 is connected in series with the positive terminal connection head 22 of the junction box 20 in the right solar cell module 1.

[0129] When the solar cell devices 16 of the solar cells 10 in each solar cell module 1 are not blocked and can work normally, the solar cells 10 in each solar cell module 1 act as power sources and apply a reverse voltage to the diodes 30 in the same group. The diodes 30 are cut off so that the left solar cell module 1, the storage battery, and the right solar cell module 1 form a closed current loop.

[0130] When the solar cell devices 16 of the solar cells 10 are partially blocked due to environmental factors, such as tree shade, fallen leaves, bird droppings, etc., the unblocked parts of the solar cell devices 16 of the solar cells 10 continue to generate electricity, while the blocked parts of the solar cell devices 16 not only cannot generate electricity, but also consume the electric energy generated by the solar cells 10 in other solar cell modules 1, forming a hot spot effect. The hot spot effect will damage the solar cells 10 and even cause a fire, leading to serious safety accidents. At this time, the entire photovoltaic power generation system may malfunction because it cannot output electric energy outward.

[0131] Take Figure 10 the partial occlusion of the solar cell device 16 of the solar cell 10 in the left solar cell module 1 in [the above] as an example. In this embodiment, the unblocked part of the solar cell device 16 in the left solar cell module 1 still acts as a power source to continue generating electricity, but the blocked part of the solar cell device 16 in the left solar cell module 1 is used as a load, resulting in a reduction in the power generation of the solar cells 10 in the left solar cell module 1.

[0132] In this way, the current generated by the solar cell module 1 on the right flows to the solar cell module 1 on the left, and a forward voltage is applied to the diode 30 of the solar cell module 1 on the left, enabling the diode 30 in the solar cell module 1 on the left to conduct forward. After conduction, the diode 30 shorts the solar cell 10 in the solar cell module 1 on the left, so that the current in the entire photovoltaic power generation system does not pass through the solar cell 10 in the solar cell module 1 on the left, preventing the generation of hot spot effect and having high safety.

[0133] Since the shaded solar cell 10 is short-circuited by the diode 20, in this case, the solar cells 10 in the remaining solar cell modules 1 can still generate electricity, and the current in the photovoltaic power generation system can pass through the diode 30 in the solar cell module 1 on the left. In this way, the entire photovoltaic power generation system will not be paralyzed due to the failure of a certain solar cell module 1 in the photovoltaic power generation system, thereby reducing the failure rate of the solar cells 10 and the solar cell modules 10 and being beneficial to the normal operation of the photovoltaic power generation system.

[0134] Please continue to refer to Figures 11 to 17 , in some embodiments of the present application, when there are two junction boxes 20, one junction box 20 includes a wiring bracket 21 and a positive terminal connector 22, and the other junction box 20 includes a wiring bracket 21 and a negative terminal connector 23; the wiring bracket 21 includes a substrate 211, a protective plate 212 and a wiring frame 213; the substrate 211 has a hollow portion 211a, the substrate 211 is disposed on the surface of the back plate 11 facing away from the transparent carrier plate 12, the protective plate 212 is located at one end of the substrate 211 and is bent relative to the substrate 211 to the side of the substrate 211 facing the back plate 11, and the wiring frame 213 is disposed on the side of the substrate 211 facing away from the back plate 11 and is aligned with the hollow portion 211a.

[0135] In one of the junction boxes 20, the substrate 211 covers a part of the second section 142b of the positive lead 14, the protective plate 212 covers the first section 142a of the positive lead 14, the positive terminal connector 22 is disposed in the wiring frame 213, and the remaining part of the second section 142b of the positive lead 14 is exposed in the hollow portion 211a and contacts the positive terminal connector 22; in the other junction box 20, the substrate 211 covers a part of the second section 142b of the negative lead 15, the protective plate 212 covers the first section 142a of the negative lead 15, the negative terminal connector 23 is disposed in the wiring frame 213, and the remaining part of the second section 142b of the negative lead 15 is exposed in the hollow portion 211a and contacts the negative terminal connector 23.

[0136] In this embodiment, a positive jack is provided on the side wall of the wiring frame 213 of one of the junction boxes 20, and a negative jack is provided on the side wall of the wiring frame 213 of the other junction box 20. The positive wiring head 22 is inserted into the positive jack, and the negative wiring head 23 is inserted into the negative jack. The junction box 20 in this embodiment is basically the same in structure as the above-mentioned one with only one junction box 20. The main difference is that in this embodiment, only the positive wiring head 22 and the positive jack are provided on one of the junction boxes 20, and only the negative wiring head 23 and the negative jack are provided on the other junction box 20. While the junction box 20 in the above-mentioned embodiment has a positive wiring head 22, a positive jack, a negative wiring head 23, and a negative jack.

[0137] In this embodiment, the positive wiring head 22 of one of the junction boxes 20 is inserted into the positive jack on the wiring frame 213 inside the junction box 20 and is electrically connected to the positive electrode of the storage battery, and the negative wiring head 23 of the other junction box 20 is inserted into the negative jack of the wiring frame 213 inside the junction box 20 and is electrically connected to the negative electrode of the storage battery.

[0138] Similarly, in this embodiment, the setting of the two junction boxes 20 can also reduce the damage of the outside world to the positive lead-out wire 14 and the negative lead-out wire 15, and can block the probability of water vapor and oxygen contacting the positive lead-out wire 14 and the negative lead-out wire 15. Moreover, it also weakens the possibility of outside water vapor and oxygen invading the inside of the solar cell 10 from the side where the protective plate 212 is located, further prolonging the service life of the solar cell 10 and the solar cell module 1.

[0139] Please refer to Figure 3 、 Figures 5 to 7 , Figure 9 , Figure 12 、 Figures 15 to 16 , Figure 18 ,In some embodiments of the present application, the solar cell module 1 further includes a positive sealing element and a negative sealing element. The positive sealing element is used to seal the gap between the second part 142 of the positive lead-out wire 14 and the junction box 20, and the negative sealing element is used to seal the gap between the second part 142 of the negative lead-out wire 15 and the junction box 20.

[0140] Among them, the positive sealing element and the negative sealing element can be a glue layer structure, a gasket structure or other sealing elements. The manufacturing materials of the positive sealing element and the negative sealing element can be the same or different.

[0141] ​When there is one junction box 20, the positive sealing element seals the gap between the junction box 20 and the second part 142 of the positive lead-out wire 14, and the negative sealing element seals the gap between the junction box 20 and the second part 142 of the negative lead-out wire 15. When there are two junction boxes 20, the positive sealing element seals the gap between one of the junction boxes 20 and the second part 142 of the positive lead-out wire 14, and the negative sealing element seals the gap between the other junction box 20 and the second part 142 of the negative lead-out wire 15.

[0142] In this embodiment, taking Figure 1 and Figure 11 as an example, from top to bottom are: junction box 20, positive lead-out wire 14 (or negative lead-out wire 15), back plate 11, edge sealing element 13, and transparent carrier plate 12.

[0143] The setting of the positive sealing element and the negative sealing element further reduces the probability of the outside water vapor and oxygen contacting the second part 142 of the positive lead-out wire 14 and the negative lead-out wire 15, and also weakens the possibility of the outside water vapor and oxygen invading the interior of the solar cell 10 from the side where the protective plate 212 is located, thereby prolonging the service life of the solar cell 10 and the solar cell module 1.

[0144] Furthermore, in some embodiments of the present application, both the positive sealing element and the negative sealing element are adhesive layer structures. The positive sealing element is adhesively bonded between the positive lead-out wire 14 and the junction box 20, and the negative sealing element is adhesively bonded between the negative lead-out wire 15 and the junction box 20.

[0145] The positive sealing element and the negative sealing element can be but are not limited to butyl rubber, polyurethane, silicone rubber, epoxy resin, etc. The positive sealing element and the negative sealing element are normally cured, and the curing process depends on the materials of the positive sealing element and the negative sealing element, including but not limited to room temperature curing, high temperature curing, ultraviolet curing, etc.

[0146] Setting the positive sealing element and the negative sealing element as adhesive layer structures not only seals the gap between the junction box 20 and the second part 142 of the positive lead-out wire 14 and the gap between the junction box 20 and the second part 142 of the negative lead-out wire 15, but also directly realizes the fixation between the positive sealing element and the second part 142 of the positive lead-out wire 14 and the junction box 20, and between the negative sealing element and the second part 142 of the negative lead-out wire 15 and the junction box 20, omitting the setting of other fixing parts, which is convenient for reducing the manufacturing cost of the solar cell module 1.

[0147] In some embodiments of the present application, when there is one junction box 20, a positive limiting groove 24 for limiting the positive sealing element and a negative limiting groove 25 for limiting the negative sealing element are provided on the junction box 20; when there are two junction boxes 20, a positive limiting groove 24 for limiting the positive sealing element is provided on one of the junction boxes 20, and a negative limiting groove 25 for limiting the negative sealing element is provided on the other junction box 20.

[0148] Specifically, both the positive limiting groove 24 and the negative limiting groove 25 extend from the substrate 211 to the protective plate 212. As an example, the positive limiting groove 24 and the negative limiting groove 25 may extend to the end face of the protective plate 212 away from the substrate 211. As an example, the positive limiting groove 24 and the negative limiting groove 25 may also be spaced apart from the end face of the protective plate 212 away from the substrate 211. That is to say, neither the positive limiting groove 24 nor the negative limiting groove 25 extends to the end face of the protective plate 212 away from the substrate 211.

[0149] Preferably, the positive limiting groove 24 and the negative limiting groove 25 are spaced apart from the end face of the protective plate 212 away from the substrate 211. In this way, the risk of water vapor and oxygen entering the positive limiting groove 24 and the negative limiting groove 25 from the end face of the protective plate 212 away from the substrate 211 can be reduced, and the physical protection and gas and water blocking effects of the junction box 20 on the second part 142 of the positive lead 14 and the negative lead 15 are improved.

[0150] Preferably, the width M of the positive limiting groove 24 and the negative limiting groove 25 is in the range of 1 millimeter (mm) to 20 millimeters (mm).

[0151] The positive limiting groove 24 can limit the positive sealing element, and the negative limiting groove 25 can limit the negative sealing element, making it easier to install the positive sealing element and the negative sealing element. Moreover, when both the positive sealing element and the negative sealing element are of a glue layer structure, before the positive sealing element and the negative sealing element are cured, the positive limiting groove 24 and the negative limiting groove 25 can also store glue, ensuring that the positive sealing element and the negative sealing element have a certain glue layer thickness after curing.

[0152] During the assembly and manufacturing process, taking the case where both the positive sealing element and the negative sealing element are of a glue layer structure as an example, the uncured colloid can be first applied into the positive limiting groove 24 and the negative limiting groove 25 of the junction box 20, and then the junction box 20 can be pressed onto the second part 142 of the positive lead 14 and the negative lead 15. Alternatively, the colloid can also be first applied onto the second part 142 of the positive lead 14 and the negative lead 15, and then the junction box 20 can be pressed onto the second part 142 of the positive lead 14 and the negative lead 15. Finally, the colloid is cured to form the positive sealing element and the negative sealing element.

[0153] Please refer to Figures 4 to 7 , and Figures 13 to 16 , Figure 19 , the present application also provides a manufacturing method of a solar cell module 1 for manufacturing the solar cell module 1 described in any one of the above embodiments. The manufacturing method of the solar cell 10 includes:

[0154] Step 100: Set an edge sealing element 13 on one side of the transparent carrier 12;

[0155] Step 200: Set the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 on the same side of the transparent carrier 12 where the edge sealing element 13 is set, and the first parts 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are both sealed through the edge sealing element 13, and the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier 12 from the same side or opposite sides of the transparent carrier 12;

[0156] Step 300: Bond the backplane 11 and the transparent carrier 12 together so that the first parts 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and the edge sealing element 13 are located between the backplane 11 and the transparent carrier 12, and laminate the backplane 11 and the transparent carrier 12 so that the edge sealing element 13 is hermetically connected between the backplane 11 and the transparent carrier 12.

[0157] Before setting the edge sealing element 13 between the spaced backplane 11 and transparent carrier 12, it further includes setting a solar cell device 16, a positive electrode lead 17 and a negative electrode lead 18 between the backplane 11 and the transparent carrier 12. The specific operation process may but is not limited to: first form the solar cell device 16, the positive electrode lead 17, the negative electrode lead 18 and the edge sealing element 13 in sequence on one side of the transparent carrier 12.

[0158] The edge sealing element 13 can be a glue layer structure, a gasket structure, etc. Taking the edge sealing element 13 as a glue layer structure as an example, the edge sealing element 13 can be an epoxy-based encapsulation glue, a silicone-based encapsulation glue, a polyurethane encapsulation glue, an ultraviolet light-curing encapsulation glue, an ethylene-vinyl acetate copolymer, a polyvinyl butyral, an ethylene-octene copolymer, a polyisobutylene, and a polyolefin-based encapsulation glue, etc. The edge sealing element 13 is a closed frame type and seals the edges of the backplane 11 and the transparent carrier 12.

[0159] Preferably, the edge sealing element 13 is a butyl rubber layer, and the butyl rubber layer can directly bond the back plate 11 and the transparent carrier plate 12. In addition, the butyl rubber layer has excellent water and gas barrier properties. By using the butyl rubber layer to seal the gap between the back plate 11 and the transparent carrier plate 12, the probability of water vapor and oxygen permeation is extremely low, meeting the packaging requirements of the solar cell 10.

[0160] When the edge sealing element 13 is a glue layer structure, as an example, after the edge sealing element 13 is coated on the transparent carrier plate 12 and before it is cured, one end of the first part 141 of the positive electrode lead-out wire 14 can be welded to the positive electrode lead 17, and the other end of the first part 141 of the positive electrode lead-out wire 14 passes through the edge sealing element 13. One end of the first part 141 of the negative electrode lead-out wire 15 is welded to the negative electrode lead 18, and the other end of the first part 141 of the negative electrode lead-out wire 15 passes through the edge sealing element 13. Since the edge sealing element 13 has a certain fluidity at this time, the edge sealing element 13 can better wrap the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and then seal the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 after curing. As an example, it can also be set that the edge sealing element 13 includes N sub-glue layers. After applying less than N sub-glue layers on the transparent carrier plate 12, one end of the first part 141 of the positive electrode lead-out wire 14 is welded to the positive electrode lead 17, one end of the first part 141 of the negative electrode lead-out wire 15 is welded to the negative electrode lead 18, and the other end of the first part 141 of the positive electrode lead-out wire 14 and the other end of the first part 141 of the negative electrode lead-out wire 15 are located on the sub-glue layer farthest from the transparent carrier plate 12. Then, sub-glue layers are continuously applied on this sub-glue layer until the sub-glue layers reach N layers. When each sub-glue layer is cured, the edge sealing element 13 can also wrap the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and seal the first part 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 after curing.

[0161] After that, the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from the same side or opposite sides of the transparent carrier plate 12, and then the back plate 11 and the transparent carrier plate 12 are laminated together, so that the first parts 141 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and the edge sealing element 13 are located between the back plate 11 and the transparent carrier plate 12. The back plate 11 and the transparent carrier plate 12 are laminated, so that the edge sealing element 13 is hermetically connected between the back plate 11 and the transparent carrier plate 12. The curing of the edge sealing element 13 can be carried out during the lamination process or after the lamination.

[0162] The lamination process enables the edge sealing element 13 inside the solar cell 10, the solar cell device 16, the first part 141 of the positive lead-out wire 14, the first part 141 of the negative lead-out wire 15, the positive lead 17, and the negative lead 18 to be tightly combined between the back plate 11 and the transparent carrier plate 12.

[0163] As described above, in the manufacturing method of the solar cell module 1 of the present application, the positive lead-out wire 14 and the negative lead-out wire 15 are led out from the same side or opposite sides of the transparent carrier plate 12, avoiding the problem of water vapor intrusion at the opening position in the traditional technology. Moreover, considering that the area to be sealed by the edge sealing element 13 is large, in order to reduce the probability of water vapor and oxygen intrusion into the solar cell 10, the edge sealing element 13 itself needs to be made of a material with better water and gas barrier properties than the traditional film and glue for filling the opening. Combined with the fact that the first part 141 of the positive lead-out wire 14 and the negative lead-out wire 15 is sealed through the edge sealing element 13, the probability of external water vapor and oxygen invading into the solar cell 10 through the gap between the positive lead-out wire 14 and the edge sealing element 13 and the gap between the negative lead-out wire 15 and the edge sealing element 13 is further reduced, thereby greatly reducing the probability of water vapor and oxygen contacting the solar cell device 16, meeting the encapsulation requirements of the solar cell 10, and extending the service life of the solar cell 10 and the solar cell module 1.

[0164] In addition, since the second part 142 of the positive lead-out wire 14 and the negative lead-out wire 15 is led out from the same side or opposite sides of the transparent carrier plate 12, there is no need to open holes on the back plate 11, reducing the manufacturing steps of the solar cell 10 and facilitating the reduction of the manufacturing cost and production efficiency of the solar cell 10.

[0165] Please refer to again Figures 1 to 3 、 Figures 5 to 7 , Figures 11 to 12 , Figures 14 to 16 、 Figure 19 。

[0166] In some embodiments of the present application, the manufacturing method of the solar cell module 1 further includes:

[0167] Step 400: When the second part 142 of the positive lead-out wire 14 and the negative lead-out wire 15 extends out of the transparent carrier plate 12 from the same side of the transparent carrier plate 12, a junction box 20 is provided to cover at least part of the second part 142 of the positive lead-out wire 14 and the negative lead-out wire 15 and is electrically connected to the second part 142 of the positive lead-out wire 14 and the negative lead-out wire 15;

[0168] When the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from opposite sides of the transparent carrier plate 12, a junction box 20 is provided to cover at least part of the second part 142 of the positive electrode lead-out wire 14 and is electrically connected to the second part 142 of the positive electrode lead-out wire 14. Another junction box 20 is provided to cover at least part of the second part 142 of the negative electrode lead-out wire 15 and is electrically connected to the second part 142 of the negative electrode lead-out wire 15.

[0169] The structure of the junction box 20 in this embodiment is exactly the same as that of the junction box 20 in any one of the above embodiments of the solar cell module 1, and the assembly manners of the junction box 20 with the positive electrode lead-out wire 14 and the junction box 20 with the negative electrode lead-out wire 15 are also exactly the same. Therefore, they will not be elaborated here.

[0170] In this application, when there is one junction box 20, the junction box 20 covers at least part of the second parts 142 of both the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 at the same time. When there are two junction boxes 20, one junction box 20 covers at least part of the second part 142 of the positive electrode lead-out wire 14, and the other junction box 20 covers at least part of the second part 142 of the negative electrode lead-out wire 15. The junction box 20 can protect the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, reduce the risk of damage to the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and improve the working reliability of the solar cell 10 and the solar cell module 1. Moreover, the junction box 20 also has a certain blocking effect on external water vapor and oxygen, which is beneficial to reducing the possibility of contact and corrosion between the external water vapor and oxygen and the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and is beneficial to preventing the water vapor and oxygen from invading the inside of the solar cell 10, ensuring the working reliability of the solar cell 10.

[0171] Please refer to Figure 20 , in some embodiments of this application, the manufacturing method of the solar cell module 1 further includes:

[0172] Please refer to Figure 20 , step 500: Bend the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and make the second parts 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 both form a first section 142a extending in a direction away from the transparent carrier plate 12, and a second section 142b bent relative to the first section 142a to the surface of the back plate 11 facing away from the transparent carrier plate 12;

[0173] Providing a junction box 20 to cover at least part of the second portion 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 and be electrically connected to the second portion 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 includes:

[0174] Providing a junction box 20 to cover at least part of the second section 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, as well as the first section 142a of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and be electrically connected to the second section 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15;

[0175] Providing a junction box 20 to cover at least part of the second portion 142 of the positive electrode lead-out wire 14 and be electrically connected to the second portion 142 of the positive electrode lead-out wire 14, and providing another junction box 20 to cover at least part of the second portion 142 of the negative electrode lead-out wire 15 and be electrically connected to the second portion 142 of the negative electrode lead-out wire 15 includes:

[0176] Providing a junction box 20 to cover at least part of the second section 142b of the positive electrode lead-out wire 14, as well as the first section 142a of the positive electrode lead-out wire 14, and be electrically connected to the second section 142b of the positive electrode lead-out wire 14; providing another junction box 20 to cover at least part of the second section 142b of the negative electrode lead-out wire 15, as well as the first section 142a of the negative electrode lead-out wire 15, and be electrically connected to the second section 142b of the negative electrode lead-out wire 15.

[0177] When the second portions 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from the same side of the transparent carrier plate 12, the first sections 142a of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are both attached to the same side surface of the back plate 11 arranged along its own width direction. When the second portions 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 extend out of the transparent carrier plate 12 from opposite sides of the transparent carrier plate 12, the first section 142a of the positive electrode lead-out wire 14 is attached to one side surface of the back plate 11 arranged along its own width direction, and the first section 142a of the negative electrode lead-out wire 15 is attached to the other side surface of the back plate 11 arranged along its own width direction. The second sections 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 are both folded to the side of the back plate 11 facing away from the transparent carrier plate 12 and attached to the back plate 11.

[0178] The junction box 20 simultaneously covers the first section 142a of both the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15. Moreover, the junction box 20 simultaneously covers at least a part of the second section 142b of both the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15. The junction box 20 can not only block mechanical damage to the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 from the outside, but also block water vapor and oxygen, reducing the probability of water vapor and oxygen coming into contact with the positive electrode lead-out wire 14, the negative electrode lead-out wire 15 and invading the interior to contact the solar cell device 16, thus extending the service life of the solar cell 10 and the solar cell module 1.

[0179] In addition, since the area of the surface of the back plate 11 facing away from the transparent carrier plate 12 is relatively large, when the second section 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15 is bent on this surface, the junction box 20 has a more flexible position on this surface to achieve electrical connection with the second section 142b of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15.

[0180] Please refer to Figure 3 、 Figures 5 to 7 , Figure 9 , Figure 12 、 Figures 15 to 16 , Figure 18 , Figure 19 。In some embodiments of the present application, the manufacturing method of the solar cell module 1 further includes:

[0181] Step 600: Set a positive electrode sealing element to seal the gap between the second part 142 of the positive electrode lead-out wire 14 and the junction box 20, and set a negative electrode sealing element to seal the gap between the second part 142 of the negative electrode lead-out wire 15 and the junction box 20.

[0182] Wherein, the positive electrode sealing element and the negative electrode sealing element can be a glue layer structure, a gasket structure or other sealing elements. Preferably, both the positive electrode sealing element and the negative electrode sealing element are glue layer structures, so that the positive electrode sealing element can be directly glued between the positive electrode lead-out wire 14 and the junction box 20, and the negative electrode sealing element can be directly glued between the negative electrode lead-out wire 15 and the junction box 20. As an example, the positive electrode sealing element and the negative electrode sealing element can be but are not limited to butyl glue, polyurethane, silica gel, epoxy resin, etc. The positive electrode sealing element and the negative electrode sealing element are normally cured, and the curing process depends on the materials of the positive electrode sealing element and the negative electrode sealing element, including but not limited to room temperature curing, high temperature curing, ultraviolet curing, etc.

[0183] When there is one junction box 20, the positive electrode sealing element seals the gap between the junction box 20 and the second part 142 of the positive electrode lead-out wire 14, and the negative electrode sealing element seals the gap between the junction box 20 and the second part 142 of the negative electrode lead-out wire 15. When there are two junction boxes 20, the positive electrode sealing element seals the gap between one of the junction boxes 20 and the second part 142 of the positive electrode lead-out wire 14, and the negative electrode sealing element seals the gap between the other junction box 20 and the second part 142 of the negative electrode lead-out wire 15.

[0184] The arrangement of the positive electrode sealing element and the negative electrode sealing element further reduces the probability of the outside water vapor and oxygen contacting the second part 142 of the positive electrode lead-out wire 14 and the negative electrode lead-out wire 15, and also weakens the possibility of the outside water vapor and oxygen invading the inside of the solar cell 10 from the side where the protection plate 212 is located, thereby prolonging the service life of the solar cell 10 and the solar cell module 1.

[0185] In some embodiments of the present application, in order to facilitate the positioning of the positive electrode sealing element and the negative electrode sealing element, a positive electrode positioning groove 24 and a negative electrode positioning groove 25 may further be provided on the junction box 20. Specifically, when there is one junction box 20, a positive electrode positioning groove 24 for positioning the positive electrode sealing element and a negative electrode positioning groove 25 for positioning the negative electrode sealing element are formed on the junction box 20. When there are two junction boxes 20, a positive electrode positioning groove 24 for positioning the positive electrode sealing element is formed on one of the junction boxes 20, and a negative electrode positioning groove 25 for positioning the negative electrode sealing element is formed on the other junction box 20.

[0186] Specifically, both the positive electrode positioning groove 24 and the negative electrode positioning groove 25 extend from the substrate 211 to the protection plate 212. As an example, the positive electrode positioning groove 24 and the negative electrode positioning groove 25 may extend to the end face of the protection plate 212 away from the substrate 211. As an example, the positive electrode positioning groove 24 and the negative electrode positioning groove 25 may also be arranged at intervals from the end face of the protection plate 212 away from the substrate 211. That is to say, neither the positive electrode positioning groove 24 nor the negative electrode positioning groove 25 extends to the end face of the protection plate 212 away from the substrate 211. Preferably, the width M of the positive electrode positioning groove 24 and the negative electrode positioning groove 25 is in the range of 1 millimeter (mm) to 20 millimeters (mm).

[0187] The positive electrode positioning groove 24 can position the positive electrode sealing element, and the negative electrode positioning groove 25 can position the negative electrode sealing element, making it easier to install the positive electrode sealing element and the negative electrode sealing element. Moreover, when both the positive electrode sealing element and the negative electrode sealing element are of a glue layer structure, before the positive electrode sealing element and the negative electrode sealing element are cured, the positive electrode positioning groove 24 and the negative electrode positioning groove 25 can also store glue, ensuring that the positive electrode sealing element and the negative electrode sealing element have a certain glue layer thickness after curing.

[0188] Next, a detailed description will be given of the manufacturing method of the solar cell module 1.

[0189] On one side of the transparent carrier plate 12, a solar cell device 16, a positive lead 17, a negative lead 18, and an edge sealing element 13 are provided. Moreover, before the edge sealing element 13 is cured, the first portions 141 of the positive lead-out wire 14 and the negative lead-out wire 15 are both disposed on this side of the transparent carrier plate 12, and the first portions 141 of the positive lead-out wire 14 and the negative lead-out wire 15 are passed through the edge sealing element 13, and the second portions 142 of the positive lead-out wire 14 and the negative lead-out wire 15 are led out from the same side or opposite sides of the transparent carrier plate 12. Then, the transparent carrier plate 12 and the back plate 11 are laminated and pressed together, and then the edge sealing element 13 is cured.

[0190] After that, the second portions 142 of the positive lead-out wire 14 and the negative lead-out wire 15 are bent to the side of the back plate 11 facing away from the transparent carrier plate 12, a fixing adhesive is dot-coated on the surface of the substrate 211 of the junction box 20 facing the back plate 11, and a colloid is dot-coated in the positive limiting groove 24 and the negative limiting groove 25 of the junction box 20, or on the second portions 142 of the positive lead-out wire 14 and the negative lead-out wire 15. Then, the junction box 20 is installed on the surface of the substrate 211 facing the back plate 11, aligning the positive lead-out wire 14 with the positive limiting groove 24, aligning the negative lead-out wire 15 and the negative limiting groove 25, aligning the second portion 142 of the positive lead-out wire 14 with the positive connection terminal 22, and aligning the second portion 142 of the negative lead-out wire 15 with the negative connection terminal 23. After that, the fixing adhesive is pressed and cured, and the colloid dot-coated in the positive limiting groove 24 and the negative limiting groove 25, or on the second portions 142 of the positive lead-out wire 14 and the negative lead-out wire 15 is pressed and cured. Finally, the second portion 142 of the positive lead-out wire 14 is welded to the positive connection terminal 22, and the second portion 142 of the negative lead-out wire 15 is welded to the negative connection terminal 23, and the junction box 20 is filled with glue and cured in the wiring frame 213. Thus, the solar cell module 1 is manufactured.

[0191] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0192] It should be understood that although the steps in the flowcharts involved in the various embodiments described above are shown sequentially according to the indications of the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless there is a clear indication in this article, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the various embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

Claims

1. A solar cell module, comprising a solar cell (10), characterized in that, the solar cell (10) comprises: a backplane (11); a transparent carrier plate (12), which is arranged at an interval from the backplane (11); an edge sealing element (13), which is hermetically connected between the backplane (11) and the transparent carrier plate (12); and a positive lead-out wire (14) and a negative lead-out wire (15), both having a connected first part (141) and a second part (142), the first parts (141) of the positive lead-out wire (14) and the negative lead-out wire (15) are both located between the backplane (11) and the transparent carrier plate (12) and hermetically pass through the edge sealing element (13), and the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15) extend out of the transparent carrier plate (12) from the same side or opposite sides of the transparent carrier plate (12).

2. The solar cell module according to claim 1, characterized in that, the solar cell module further comprises a junction box (20); when the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15) extend out of the transparent carrier plate (12) from the same side of the transparent carrier plate (12), the junction box (20) is one and simultaneously covers at least part of the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15), and is electrically connected to the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15); when the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15) extend out of the transparent carrier plate (12) from opposite sides of the transparent carrier plate (12), the junction box (20) is two, one of the junction boxes (20) covers at least part of the second part (142) of the positive lead-out wire (14) and is electrically connected to the second part (142) of the positive lead-out wire (14), and the other junction box (20) covers at least part of the second part (142) of the negative lead-out wire (15) and is electrically connected to the second part (142) of the negative lead-out wire (15).

3. The solar cell module according to claim 2, characterized in that, the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15) both comprise a connected first section (142a) and a second section (142b); in the same positive lead-out wire (14) or negative lead-out wire (15), the first section (142a) extends in a direction away from the transparent carrier plate (12), and the second section (142b) is bent relative to the first section (142a) to the surface of the backplane (11) facing away from the transparent carrier plate (12); When there is one junction box (20), the junction box (20) covers at least part of the second section (142b) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15), and the first section (142a) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15), and is electrically connected to the second section (142b) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15); When there are two junction boxes (20), one of the junction boxes (20) covers at least part of the second section (142b) of the positive electrode lead-out wire (14) and the first section (142a) of the positive electrode lead-out wire (14), and is electrically connected to the second section (142b) of the positive electrode lead-out wire (14), and the other junction box (20) covers at least part of the second section (142b) of the negative electrode lead-out wire (15) and the first section (142a) of the negative electrode lead-out wire (15), and is electrically connected to the second section (142b) of the negative electrode lead-out wire (15).

4. The solar cell module according to claim 3, characterized in that, when there is one junction box (20), the junction box (20) includes a wiring bracket (21), a positive electrode connection head (22) and a negative electrode connection head (23); the wiring bracket (21) includes a substrate (211), a protective plate (212) and a wiring frame (213); the substrate (211) has a hollowed-out part (211a), the substrate (211) is arranged on the surface of the back plate (11) facing away from the transparent carrier plate (12), and covers part of the second section (142b) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15) at the same time; the protective plate (212) is located at one end of the substrate (211) and is bent relative to the substrate (211) to the side of the substrate (211) facing the back plate (11), and covers the first section (142a) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15) at the same time; the wiring frame (213) is arranged on the side of the substrate (211) facing away from the back plate (11) and is aligned with the hollowed-out part (211a), the positive electrode connection head (22) and the negative electrode connection head (23) are both arranged in the wiring frame (213), the remaining part of the second section (142b) of the positive electrode lead-out wire (14) is exposed in the hollowed-out part (211a) and contacts the positive electrode connection head (22), and the remaining part of the second section (142b) of the negative electrode lead-out wire (15) is exposed in the hollowed-out part (211a) and contacts the negative electrode connection head (23).

5. The solar cell module according to claim 4, characterized in that, the solar cell module further includes a diode (30), the diode (30) is located in the wiring frame (213), and the diode (30) is connected in parallel and reversely connected between the positive electrode connection head (22) and the negative electrode connection head (23).

6. The solar cell module according to claim 3, wherein, when there are two junction boxes (20), one of the junction boxes (20) includes a wiring bracket (21) and a positive terminal (22), and the other junction box (20) includes the wiring bracket (21) and a negative terminal (23); the wiring bracket (21) includes a substrate (211), a protective plate (212) and a wiring frame (213); the substrate (211) has a hollow portion (211a), the substrate (211) is disposed on the surface of the backsheet (11) facing away from the transparent carrier plate (12), the protective plate (212) is located at one end of the substrate (211) and is bent relative to the substrate (211) to the side of the substrate (211) facing the backsheet (11), and the wiring frame (213) is disposed on the side of the substrate (211) facing away from the backsheet (11) and is aligned with the hollow portion (211a); in one of the junction boxes (20), the substrate (211) covers a part of the second section (142b) of the positive lead-out wire (14), the protective plate (212) covers the first section (142a) of the positive lead-out wire (14), the positive terminal (22) is disposed within the wiring frame (213), and the remaining part of the second section (142b) of the positive lead-out wire (14) is exposed within the hollow portion (211a) and contacts the positive terminal (22); in the other junction box (20), the substrate (211) covers a part of the second section (142b) of the negative lead-out wire (15), the protective plate (212) covers the first section (142a) of the negative lead-out wire (15), the negative terminal (23) is disposed within the wiring frame (213), and the remaining part of the second section (142b) of the negative lead-out wire (15) is exposed within the hollow portion (211a) and contacts the negative terminal (23).

7. The solar cell module according to any one of claims 2 to 6, wherein, the solar cell module further includes a positive sealing element and a negative sealing element, the positive sealing element is used to seal the gap between the second part (142) of the positive lead-out wire (14) and the junction box (20), and the negative sealing element is used to seal the gap between the second part (142) of the negative lead-out wire (15) and the junction box (20).

8. The solar cell module according to claim 7, wherein, both the positive sealing element and the negative sealing element are adhesive layer structures, the positive sealing element is adhesively bonded between the positive lead-out wire (14) and the junction box (20), and the negative sealing element is adhesively bonded between the negative lead-out wire (15) and the junction box (20).

9. The solar cell module according to claim 7, wherein, When there is one junction box (20), a positive limiting groove (24) for limiting the positive sealing element and a negative limiting groove (25) for limiting the negative sealing element are formed on the junction box (20). When there are two junction boxes (20), a positive limiting groove (24) for limiting the positive sealing element is formed on one of the junction boxes (20), and a negative limiting groove (25) for limiting the negative sealing element is formed on the other junction box (20).

10. The solar cell module according to claim 1, characterized in that the edge sealing element (13) is a butyl rubber layer.

11. A manufacturing method of a solar cell module, characterized in that the manufacturing method of the solar cell module includes: arranging an edge sealing element (13) on one side of a transparent carrier plate (12); arranging a first part (141) of a positive lead-out wire (14) and a negative lead-out wire (15) on the same side of the transparent carrier plate (12) where the edge sealing element (13) is arranged, and the first parts (141) of the positive lead-out wire (14) and the negative lead-out wire (15) both penetrate through the edge sealing element (13) in a sealed manner, and extending a second part (142) of the positive lead-out wire (14) and the negative lead-out wire (15) out of the transparent carrier plate (12) from the same side or opposite sides of the transparent carrier plate (12); combining a back plate (11) with the transparent carrier plate (12) so that the first parts (141) of the positive lead-out wire (14) and the negative lead-out wire (15), and the edge sealing element (13) are located between the back plate (11) and the transparent carrier plate (12), and laminating the back plate (11) and the transparent carrier plate (12) so that the edge sealing element (13) is hermetically connected between the back plate (11) and the transparent carrier plate (12).

12. The manufacturing method of the solar cell module according to claim 11, characterized in that it further includes: when the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15) extend out of the transparent carrier plate (12) from the same side of the transparent carrier plate (12), arranging one junction box (20) to cover at least part of the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15) and being electrically connected to the second parts (142) of the positive lead-out wire (14) and the negative lead-out wire (15). When the second parts (142) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15) extend out of the transparent carrier plate (12) from opposite sides of the transparent carrier plate (12), a junction box (20) is provided to cover at least a part of the second part (142) of the positive electrode lead-out wire (14) and is electrically connected to the second part (142) of the positive electrode lead-out wire (14). Another junction box (20) is provided to cover at least a part of the second part (142) of the negative electrode lead-out wire (15) and is electrically connected to the second part (142) of the negative electrode lead-out wire (15).

13. The manufacturing method of the solar cell module according to claim 12, characterized in that, further comprising: bending the second parts (142) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15) so that the second parts (142) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15) both form a first section (142a) extending in a direction away from the transparent carrier plate (12), and bending relative to the first section (142a) to a second section (142b) on the surface of the back plate (11) facing away from the transparent carrier plate (12); providing a junction box (20) to cover at least a part of the second parts (142) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15) and being electrically connected to the second parts (142) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15), including: providing a junction box (20) to cover at least a part of the second sections (142b) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15), and the first sections (142a) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15), and being electrically connected to the second sections (142b) of the positive electrode lead-out wire (14) and the negative electrode lead-out wire (15); providing a junction box (20) to cover at least a part of the second part (142) of the positive electrode lead-out wire (14) and being electrically connected to the second part (142) of the positive electrode lead-out wire (14), and providing another junction box (20) to cover at least a part of the second part (142) of the negative electrode lead-out wire (15) and being electrically connected to the second part (142) of the negative electrode lead-out wire (15), including: providing a junction box (20) to cover at least a part of the second section (142b) of the positive electrode lead-out wire (14) and the first section (142a) of the positive electrode lead-out wire (14), and being electrically connected to the second section (142b) of the positive electrode lead-out wire (14); providing another junction box (20) to cover at least a part of the second section (142b) of the negative electrode lead-out wire (15) and the first section (142a) of the negative electrode lead-out wire (15), and being electrically connected to the second section (142b) of the negative electrode lead-out wire (15).

14. The manufacturing method of the solar cell module according to claim 12 or 13, characterized in that, further comprising: arranging a positive sealing element to seal a gap between the second part (142) of the positive lead-out wire (14) and the junction box (20), and arranging a negative sealing element to seal a gap between the second part (142) of the negative lead-out wire (15) and the junction box (20).

Images