Manufacturing method of photovoltaic module and device for manufacturing photovoltaic module

Abstract

The invention provides a manufacturing method of a photovoltaic module and a device for manufacturing the photovoltaic module. The manufacturing method of the photovoltaic module comprises the following steps: heating glass to a preset temperature; and laying a packaging adhesive film on the glass heated to the preset temperature. According to the manufacturing method of the photovoltaic module disclosed by the invention, the packaging adhesive film is preliminarily pre-crosslinked by heating the glass, so that the packaging adhesive film is effectively adhered to the glass, thereby effectively avoiding the movement of the adhesive film laying position in the subsequent production process, and effectively ensuring the precision of the distance between the adhesive film and the sealant.

Description

Technical Field

[0001] The present disclosure relates to the technical field of solar cells, and in particular to a method for manufacturing a photovoltaic module and a device for manufacturing a photovoltaic module. Background Art

[0002] With the development of solar cell technology, photovoltaic modules have higher and higher requirements for the sealing performance of cells. Especially HJT cells, because they are extremely sensitive to water vapor, if the packaging is not tight, it will cause the components to age easily and the power will decay seriously, making it difficult to ensure the normal service life.

[0003] Conventional HJT packaging solutions usually use sealants for sealing, which are laid on the inner edges of the glass of the photovoltaic module, and then the photovoltaic modules are encapsulated together through lamination. However, during the laying process of the sealant, the laying accuracy of the front and rear encapsulation films, especially the spacing between the encapsulation films and the sealant, is extremely strict, otherwise it will affect the sealing performance of the module, and thus seriously affect the reliability of the module. Summary of the invention

[0004] In order to overcome the above problems, the present disclosure provides a method for manufacturing a photovoltaic module, comprising: heating glass to a preset temperature; and laying a packaging film on the glass heated to the preset temperature.

[0005] In the manufacturing method of the photovoltaic module described in the present disclosure, the glass is the front glass of the photovoltaic module, and the packaging film is the front packaging film of the photovoltaic module; and / or the glass is the back glass of the photovoltaic module, and the packaging film is the back packaging film of the photovoltaic module.

[0006] In the method for manufacturing the photovoltaic module disclosed in the present invention, the glass is heated to a preset temperature of 50-70°C.

[0007] In the method for manufacturing a photovoltaic module disclosed in the present invention, the glass is heated to a preset temperature by any heating method including lamp tube heating, hot air heating or bottom plate heating.

[0008] The present invention discloses a method for manufacturing a photovoltaic module, wherein the glass comprises a front glass and a back glass, and the packaging film comprises a front packaging film and a back packaging film; the method for manufacturing a photovoltaic module further comprises: assembling the front glass with the front packaging film and the back glass with the back packaging film.

[0009] In the manufacturing method of the photovoltaic module described in the present invention, the manufacturing method of the photovoltaic module includes: finely cutting the front packaging film; heating the front glass to a preset temperature, and then laying the front packaging film on the light-emitting side surface of the front glass; laying a battery string on the front packaging film and forming a circuit; arranging sealant around the light-emitting side surface of the front glass; finely cutting the back packaging film; heating the back glass to a preset temperature, and laying the back packaging film on the back glass; laying the back glass with the back packaging film on the battery string, and then performing edge sealing and lamination.

[0010] In the manufacturing method of the photovoltaic module described in the present disclosure, the glass includes front glass and back glass, and the packaging film includes front packaging film and back packaging film; the manufacturing method of the photovoltaic module includes: finely cutting the front packaging film; heating the front glass to a preset temperature, and then laying the front packaging film on the light-emitting side surface of the front glass; laying a battery string on the front packaging film to form a circuit; arranging sealant around the light-emitting side surface of the front glass; finely cutting the back packaging film, and then laying the back packaging film on the battery string; laying the back glass on the back packaging film, and then performing edge sealing and lamination.

[0011] In the manufacturing method of the photovoltaic module described in the present invention, the manufacturing method of the photovoltaic module also includes: when laying the front packaging film on the front glass, using an infrared positioning device to check the laying position of the front packaging film and make corrections; and / or when laying the back packaging film on the back glass, using an infrared positioning device to check the laying position of the back packaging film and make corrections.

[0012] The present disclosure provides a device for manufacturing a photovoltaic module. The device comprises a heater for heating glass to a preset temperature. The glass is a front glass or a back glass of the photovoltaic module.

[0013] In the device for manufacturing photovoltaic modules disclosed in the present invention, the heater may be any one of a heating lamp, a heat blower, and a heating base plate.

[0014] In the device for manufacturing photovoltaic modules disclosed in the present invention, the device also includes an infrared positioning device arranged above the film cutting machine.

[0015] According to the method for manufacturing photovoltaic modules disclosed in the present invention, the encapsulation film is preliminarily cross-linked by heating the glass so that it can be effectively bonded to the glass, thereby effectively avoiding the movement of the film laying position during subsequent production and effectively ensuring the accuracy of the distance between the film and the sealant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a flow chart of a method for manufacturing a photovoltaic module according to an embodiment of the present disclosure.

[0017] Figure 2 The present invention is a flow chart of a method for manufacturing a photovoltaic module according to another embodiment of the present disclosure.

[0018] Figure 3 The present invention is a flow chart of a method for manufacturing a photovoltaic module according to another embodiment of the present disclosure.

[0019] Figure 4 is a structural diagram of a photovoltaic module according to one embodiment of the present disclosure.

[0020] Figure 5 It is a schematic diagram of heating glass according to the method for manufacturing a photovoltaic module disclosed in the present invention.

[0021] Figure 6 It is a schematic diagram of infrared positioning and correction of the method for manufacturing a photovoltaic module according to the present disclosure.

[0022] Description of Reference Numerals

[0023] 1-front glass, 2-front encapsulation film, 3-cell string, 4-back encapsulation film, 5-back glass DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the technical solution of the present disclosure is described in detail below with reference to the accompanying drawings.

[0025] Example embodiments will be described more fully below with reference to the accompanying drawings, but the example embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, the purpose of providing these embodiments is to make the present disclosure thorough and complete and to enable those skilled in the art to fully understand the scope of the present disclosure.

[0026] In the absence of conflict, the various embodiments of the present disclosure and the various features therein may be combined with each other.

[0027] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0028] The terms used herein are only used to describe specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "a", "an" and "the" are also intended to include the plural forms, unless the context clearly indicates otherwise. It will also be understood that when the terms "comprising" and / or "made of" are used in this specification, the presence of the features, wholes, steps, operations, elements and / or components is specified, but the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof is not excluded.

[0029] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted as having an idealized or overly formal meaning unless explicitly defined as such herein.

[0030] In conventional HJT packaging solutions, if the distance between the edge of the film and the sealant is too large, a large number of bubbles will appear between the sealant and the film after lamination, which will seriously affect the reliability of the component; if the distance between the edge of the film and the sealant is too small, the flow space between the film and the sealant is insufficient during the lamination process, which may cause the film to extrude to the sealant position, forming a film puncture in the sealant, resulting in insufficient actual sealant width, which will seriously affect the sealing performance of the component. Moreover, after the film is laid, due to various factors such as the jitter of the assembly line, the air conditioning of the production line, manual rework, and the friction of the glass bonding process, it is easy to cause the film position to shift, thereby changing the distance from the sealant and further affecting the reliability of the HJT component after lamination.

[0031] In view of this, the present disclosure provides a method for manufacturing a photovoltaic module, such as Figure 1 As shown, including:

[0032] S1-Heat the glass to a preset temperature.

[0033] S2-laying a packaging film on the glass heated to a preset temperature.

[0034] In the manufacturing method of the photovoltaic module described in the present disclosure, the glass is the front glass of the photovoltaic module, and the packaging film is the front packaging film of the photovoltaic module; and / or the glass is the back glass of the photovoltaic module, and the packaging film is the back packaging film of the photovoltaic module.

[0035] In the method for manufacturing a photovoltaic module disclosed in the present invention, the glass is heated to a preset temperature of 50-70°C.

[0036] In the method for manufacturing a photovoltaic module disclosed in the present invention, the glass is heated to a preset temperature by any heating method including lamp tube heating, hot air heating or bottom plate heating.

[0037] The present invention discloses a method for manufacturing a photovoltaic module, wherein the glass comprises a front glass and a back glass, and the packaging film comprises a front packaging film and a back packaging film; the method for manufacturing a photovoltaic module further comprises: assembling the front glass with the front packaging film and the back glass with the back packaging film.

[0038] like Figure 2As shown, the method for manufacturing a photovoltaic module according to the present disclosure includes:

[0039] S11-finely cut the front packaging film;

[0040] S12-heating the front glass to a preset temperature, and then laying a front encapsulation film on the light-emitting side surface of the front glass;

[0041] S13-laying the battery string on the front packaging film and forming a circuit;

[0042] S14-Apply sealant around the light-emitting side surface of the front glass;

[0043] S15: Finely cut the back packaging film, and then lay the back packaging film on the battery string;

[0044] S16-Laying the back glass on the back encapsulation film, followed by edge sealing and lamination.

[0045] like Figure 3 As shown, the method for manufacturing a photovoltaic module according to the present disclosure includes:

[0046] S21-finely cut the front packaging film;

[0047] S22-heating the front glass to a preset temperature, and then laying a front encapsulation film on the light-emitting side surface of the front glass;

[0048] S23-laying the battery string on the front packaging film and forming a circuit;

[0049] S24-Apply sealant around the light-emitting side surface of the front glass;

[0050] S25-fine cutting of the back side packaging film;

[0051] S26-heating the back glass to a preset temperature and laying the back encapsulation film on the back glass;

[0052] S27-Lay the back glass with the back encapsulation film on the battery string, and then perform edge sealing and lamination.

[0053] According to the method for manufacturing a photovoltaic module disclosed in the present invention, when laying the front / back encapsulation film on the front / back glass surface, an infrared positioning device is used to check the laying position of the encapsulation film and perform correction.

[0054] like Figure 4 As shown, the photovoltaic module disclosed in the present invention includes a front glass 1, a front packaging film 2, a battery string 3, a back packaging film 4, a back glass 5 and a sealant (not shown).

[0055] The encapsulation film is an ethylene-vinyl acetate copolymer (EVA) film. At least one of the glasses is a light-transmitting glass, and the light-transmitting glass can be a fully transparent or semi-transparent material. The battery string may include one or more battery components electrically connected to each other. The sealant includes but is not limited to butyl glue, butyl tape and POE, as long as it can achieve sealing between the front and back glasses.

[0056] like Figure 5 As shown, the present disclosure also provides a device for manufacturing a photovoltaic module, wherein the device comprises a heater for heating the front / back glass.

[0057] like Figure 6 As shown, the device for making photovoltaic modules in the present disclosure also includes an infrared positioning device above the film cutting machine. The infrared positioning device can project a rectangular positioning projection on the glass to assist in checking whether the laying position of the packaging film is accurate, and if it is inaccurate, manual correction is performed.

[0058] According to one embodiment of the present disclosure, the manufacturing method of the photovoltaic module includes: using a film precision cutting machine to cut the front packaging film to obtain a packaging film of a required size; heating the front glass to a preset temperature of 50-70°C by a heater, and then laying the front packaging film on the surface of the light-emitting side of the front glass; using a typesetting machine to lay a battery string on the front packaging film, and using a stack welding machine to weld the battery string into a complete circuit; using a glue machine to arrange sealant around the light-emitting side surface of the front glass, and maintaining an appropriate distance between the sealant and the packaging film; using a film precision cutting machine to precision cut the back packaging film, and then laying the back packaging film on the battery string; laying the back glass on the back packaging film, and then performing edge sealing and lamination.

[0059] According to another embodiment of the present disclosure, the manufacturing method of the photovoltaic module includes: using a film cutting machine to cut the front packaging film to obtain a packaging film of a required size; heating the front glass to a preset temperature of 50-70°C by a heater, and then laying the front packaging film on the surface of the light-emitting side of the front glass; using a typesetting machine to lay a battery string on the front packaging film, and using a stack welding machine to weld the battery string into a complete circuit; using a glue machine to arrange sealant around the light-emitting side surface of the front glass, and maintaining an appropriate distance between the sealant and the packaging film; using a film cutting machine to cut the back packaging film; heating the back glass to a preset temperature of 50-70°C by a heater, and then laying the back packaging film on the inner surface of the back glass; laying the back glass with the back packaging film on the battery string, and then performing edge sealing and lamination.

[0060] By laying the film on the heated glass, the encapsulation film is preliminarily cross-linked and effectively bonded to the glass, thereby effectively avoiding the movement of the film laying position during the subsequent production process and ensuring the accuracy of the distance between the film and the sealant. Furthermore, by pre-bonding the back encapsulation film and the back glass, the laying process of the back encapsulation film and the back glass is combined into one, effectively ensuring the distance between the back encapsulation film and the edge of the sealant.

[0061] According to another embodiment of the present disclosure, the manufacturing method of the photovoltaic module includes: using a film cutting machine to cut the front packaging film to obtain a packaging film of a required size; heating the front glass to a preset temperature of 50-70°C by a heater, and then laying the front packaging film on the surface of the light-emitting side of the front glass; checking whether the laying position of the packaging film is accurate by an infrared positioning device arranged above the film cutting machine, and performing manual correction if it is inaccurate; using a typesetting machine to lay a battery string on the front packaging film, and using a stack welding machine to weld the battery string into a complete circuit; using a glue machine to arrange sealant around the surface of the light-emitting side of the front glass, and maintaining an appropriate distance between the sealant and the packaging film; using a film cutting machine to cut the back packaging film, and then laying the back packaging film on the battery string; laying the back glass on the back packaging film, and then performing edge sealing and lamination.

[0062] According to another embodiment of the present disclosure, the manufacturing method of the photovoltaic module includes: using a film cutting machine to cut the front packaging film to obtain a packaging film of a required size; heating the front glass to a preset temperature of 50-70°C by a heater, and then laying the front packaging film on the surface of the light-emitting side of the front glass; checking whether the laying position of the packaging film is accurate by an infrared positioning device arranged above the film cutting machine, and performing manual correction if it is inaccurate; using a typesetting machine to lay a battery string on the front packaging film, and using a stack welding machine to weld the battery string into a complete circuit; using a glue machine to arrange sealant around the light-emitting side surface of the front glass, and maintaining an appropriate distance between the sealant and the packaging film; using a film cutting machine to cut the back packaging film; heating the back glass to a preset temperature of 50-70°C by a heater, and then laying the back packaging film on the inner surface of the back glass; laying the back glass with the back packaging film on the battery string, and then performing edge sealing and lamination.

[0063] By setting the parameters of the infrared positioning device, a red frame line for positioning is projected on the front glass. The size of the red frame line is the same as the size of the front packaging film, and the projected position is the correct laying position of the front packaging film. Therefore, after laying the front packaging film on the light-emitting side surface of the front glass, by observing the corresponding position of the film edge line and the projected red frame line, the staff can intuitively determine whether the film laying position is accurate and make corrections in time. At the same time, since the size of the packaging film after fine cutting is consistent with the size of the red frame line, if one or both sides of the film exceed the positioning red frame, the other side or both sides of the film will definitely be smaller than the positioning red frame. The film fine cutting machine can use a cutter to cut off the film that exceeds the range, and the cut-off film part can be used to fill the other two missing sides.

[0064] In order to enable those skilled in the art to more clearly understand the technical solutions provided by the embodiments of the present disclosure, the technical solutions provided by the embodiments of the present disclosure are described in detail below through specific examples.

[0065] Example 1

[0066] A 66-panel 210HJT module was prepared, and the front packaging film was cut using a film cutting machine to obtain a packaging film with a size of 2368 mm × 1287 mm; the front glass was heated to a preset temperature of 60°C using a lamp tube heater, and then the front packaging film was laid on the surface of the light-emitting side of the front glass; a battery string was laid on the front packaging film using a typesetting machine, the number of battery strings was 12, and a stack welding machine was used to weld the battery strings into a complete circuit; a glue sprayer was used to arrange black butyl glue as a sealant around the surface of the light-emitting side of the front glass, and a spacing of 3 mm was retained between the butyl glue and the packaging film; similarly, a back packaging film with the same size as the front packaging film was obtained using a film cutting machine, and then the back packaging film was laid on the battery string; the back glass was laid on the back packaging film, and then edge sealing and lamination were performed.

[0067] Example 2

[0068] A 66-panel 210HJT component is prepared according to the same manufacturing method as Example 1, except that: the front glass is heated to a preset temperature of 55°C by a heater, and then a front encapsulation film is laid on the surface of the light-emitting side of the front glass; and after the back encapsulation film is obtained by precision cutting; the back glass is first heated to a preset temperature of 65°C by a heater, and then the back encapsulation film is laid on the inner surface of the back glass; finally, the back glass with the back encapsulation film is laid on the battery string, and then edge sealing and lamination are performed.

[0069] Example 3

[0070] A 66-panel 210HJT component is prepared according to the same manufacturing method as Example 1, except that: the front glass is heated to a preset temperature of 65°C by a heater, and then a front encapsulation film is laid on the surface of the light-emitting side of the front glass; the infrared positioning device arranged above the film cutting machine is used to check whether the laying position of the encapsulation film is accurate, and if it is inaccurate, manual correction is performed.

[0071] Example 4

[0072] A 66-panel 210HJT component is prepared according to the same manufacturing method as Example 1, except that: the front glass is heated to a preset temperature of 70°C by a heater, and then a front encapsulation film is laid on the surface of the light-emitting side of the front glass; an infrared positioning device arranged above the film cutting machine is used to check whether the laying position of the encapsulation film is accurate, and if it is inaccurate, manual correction is performed; and after the back encapsulation film is obtained by cutting; first, the back glass is heated to a preset temperature of 60°C by a heater, and then the back encapsulation film is laid on the inner surface of the back glass; finally, the back glass with the back encapsulation film is laid on the battery string, and then edge sealing and lamination are performed.

[0073] Comparative Example 1

[0074] A 66-panel 210HJT module was prepared according to the same manufacturing method as in Example 1, except that the front glass was not heated and the front encapsulation film was directly laid on the light-emitting side of the front glass.

[0075] The photovoltaic modules obtained in the embodiments and comparative examples were subjected to performance tests, and the following table shows a comparison of performance parameters of the photovoltaic modules.

[0076] Table 1:

[0077]

[0078] It can be seen from the results in Table 1 that according to the manufacturing method of the photovoltaic module disclosed in the present invention, the laying position of the packaging film is more precise by heating the glass, and the problem of displacement of the packaging film during operation is eliminated, so that the accuracy of the distance between the film and the sealant can be effectively guaranteed, thereby reducing the power attenuation of the photovoltaic module and improving the reliability of the photovoltaic module.

[0079] Example embodiments have been disclosed herein, and although specific terms are employed, they are used and should be interpreted only in a general illustrative sense and not for limiting purposes. In some instances, it will be apparent to those skilled in the art that, unless otherwise expressly noted, features, characteristics, and / or elements described in conjunction with a particular embodiment may be used alone or in combination with features, characteristics, and / or elements described in conjunction with other embodiments. Therefore, those skilled in the art will appreciate that various changes in form and detail may be made without departing from the scope of the present disclosure as set forth in the appended claims.

Claims

1. A method for manufacturing a photovoltaic module, comprising: heating the glass to a preset temperature; A packaging adhesive film is laid on the glass heated to a preset temperature.

2. The method for manufacturing a photovoltaic module according to claim 1, wherein: The glass is the front glass of the photovoltaic module, and the packaging film is the front packaging film of the photovoltaic module; and / or The glass is the back glass of the photovoltaic module, and the packaging film is the back packaging film of the photovoltaic module.

3. The method for manufacturing a photovoltaic module according to claim 1, wherein: Heat the glass to a preset temperature of 50-70°C.

4. The method for manufacturing a photovoltaic module according to claim 1, wherein: The glass is heated to a preset temperature by any heating method including lamp tube heating, hot air heating or bottom plate heating.

5. The method for manufacturing a photovoltaic module according to claim 2, wherein: The glass comprises a front glass and a back glass, and the packaging film comprises a front packaging film and a back packaging film; The method for manufacturing the photovoltaic module further includes: Assemble the front glass with the front packaging film and the back glass with the back packaging film.

6. The method for manufacturing a photovoltaic module according to claim 5, wherein: The method for manufacturing a photovoltaic module includes: Fine-cutting of the front packaging film; The front glass is heated to a preset temperature, and then a front encapsulation film is laid on the light-emitting side surface of the front glass; Laying battery strings on the front packaging film and forming a circuit; Place sealant around the light-emitting side surface of the front glass; Fine-cut the backside encapsulation film; The rear glass is heated to a preset temperature, and the rear encapsulation film is laid on the rear glass; The back glass with the back encapsulation film is laid on the battery string, and then edge-sealed and laminated.

7. The method for manufacturing a photovoltaic module according to claim 2, wherein: The glass comprises a front glass and a back glass, and the packaging film comprises a front packaging film and a back packaging film; The method for manufacturing the photovoltaic module comprises: Fine-cutting of the front packaging film; The front glass is heated to a preset temperature, and then a front encapsulation film is laid on the light-emitting side surface of the front glass; Laying battery strings on the front packaging film and forming a circuit; Place sealant around the light-emitting side surface of the front glass; The back side encapsulation film is finely cut and then laid on the battery string; The back glass is laid on the back encapsulation film, followed by edge sealing and lamination.

8. The method for manufacturing a photovoltaic module according to any one of claims 2 to 7, wherein: The method for manufacturing the photovoltaic module further includes: When laying the front sealing film on the front glass, use an infrared positioning device to check the laying position of the front sealing film and make corrections; and / or When laying the back sealing film on the back glass, use an infrared positioning device to check the laying position of the back sealing film and make corrections.

9. A device for manufacturing a photovoltaic module, the device comprising a heater for heating glass to a preset temperature, the glass being the front glass or the back glass of the photovoltaic module.

10. The device for manufacturing a photovoltaic module according to claim 9, wherein: The heater may be any one of a heating lamp, a heat blower, and a heating base plate.

11. The device for manufacturing a photovoltaic module according to claim 9 or 10, wherein: The device also includes an infrared positioning device arranged above the film fine cutting machine.

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