Photovoltaic module and method of manufacturing the same

Abstract

The application relates to a photovoltaic module and a manufacturing method thereof. The manufacturing method comprises the following steps: providing a laminated piece, a reflective film strip, an isolation strip and a jumper; the reflective film strip is attached to the isolation strip to form a first composite piece; or, the reflective film strip is attached to the jumper to form the first composite piece; when the first composite piece comprises the reflective film strip and the isolation strip, the first composite piece is attached to the jumper to form a second composite piece; when the first composite piece comprises the reflective film strip and the jumper, the first composite piece is attached to the isolation strip to form the second composite piece; and the second composite piece is overlapped and welded to the laminated piece to form the photovoltaic module. The manufacturing method of the photovoltaic module provided by the application completes the lamination and attachment process of the isolation strip, the reflective film strip and the jumper in the preparation process, avoids the interference of the laminated piece on the jumper in the process of attaching the reflective film strip, simplifies the film-attaching operation of the reflective film strip on the surface of the jumper, and stacks the reflective film strip between the isolation strip and the jumper, so that the photoelectric conversion efficiency and the aesthetic appearance of the photovoltaic module can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic technology, in particular to a photovoltaic module and a manufacturing method thereof. BACKGROUND

[0002] As a mainstream technology for utilizing solar energy resources, photovoltaic power generation technology is an important field of green energy development and has been commercialized. In a photovoltaic module, light energy is converted into electrical energy through the photovoltaic effect of cell pieces, and the electrical energy generated by the cell pieces is collected by busbars and then output. Adjacent cell string groups are electrically connected by jumpers. Since the jumper is usually a conductor made of conductive material, when it overlaps with the cell piece array, the interconnection strip for electrically connecting the cell pieces is prone to overlap with the jumper. If the two are in direct contact, a short circuit will occur, affecting the normal operation of the photovoltaic module. Therefore, an insulating strip is provided on the jumper to avoid the adverse effects of the jumper contacting the cell pieces and causing a short circuit.

[0003] In order to improve the photoelectric conversion efficiency and aesthetics of the photovoltaic module, painting or film pasting treatment is usually performed on the jumper. Currently, the film pasting treatment on the surface of the jumper is limited by the interference of the cell module, resulting in excessive difficulty in film pasting operation and poor film quality. SUMMARY

[0004] Therefore, it is necessary to provide a photovoltaic module and a manufacturing method thereof to solve the problems of excessive difficulty in film pasting operation and poor film quality on the surface of the jumper.

[0005] A photovoltaic module manufacturing method, the photovoltaic module manufacturing method comprising:

[0006] Step S110: providing a laminated piece, a reflective film strip, an isolation strip, and a jumper;

[0007] Step S120: the reflective film strip is pasted on the isolation strip to form a first composite piece; or, the reflective film strip is pasted on the jumper to form the first composite piece;

[0008] Step S130: when the first composite piece comprises the reflective film strip and the isolation strip, the first composite piece is pasted on the jumper to form a second composite piece; when the first composite piece comprises the reflective film strip and the jumper, the first composite piece is pasted on the isolation strip to form the second composite piece; wherein the second composite piece comprises the isolation strip, the reflective film strip, and the jumper which are laminated;

[0009] Step S140: the second composite piece is overlap-welded on the laminated piece to form a photovoltaic module.

[0010] In one embodiment, the step S120 specifically comprises:

[0011] Step S121: at least part of the reflective film strip or at least part of the separation strip is melted to form a molten layer;

[0012] Step S122: solidifying the molten layer, and rolling the reflective film strip or the separation strip during the solidification process, so that the reflective film strip is attached to the separation strip to form the first composite;

[0013] or;

[0014] Step S123: at least part of the reflective film strip is melted to form a molten layer;

[0015] Step S124: solidifying the molten layer, and rolling the reflective film strip or the jumper wire during the solidification process, so that the reflective film strip is attached to the jumper wire to form the first composite.

[0016] In one embodiment, the step S130 specifically includes:

[0017] Step S131: when the first composite includes the reflective film strip and the separation strip, at least part of the side of the first composite away from the separation strip is melted to form a molten layer;

[0018] Step S132: solidifying the molten layer, and rolling the first composite or the jumper wire during the solidification process, so that the first composite is attached to the jumper wire to form the second composite;

[0019] or;

[0020] Step S133: when the first composite includes the reflective film strip and the jumper wire, at least part of the side of the first composite away from the jumper wire is melted to form a molten layer;

[0021] Step S134: solidifying the molten layer, and rolling the first composite or the separation strip during the solidification process, so that the first composite is attached to the separation strip to form the second composite.

[0022] In one embodiment, the molten layer is formed by hot air heating, and the solidification of the molten layer is completed by cold air solidification;

[0023] In one embodiment, the melting temperature is 300-500℃, the melting air pressure is 0.2-0.5MPa, and the solidification air pressure is 0.1-0.2MPa.

[0024] In one embodiment, the second composite is formed by rolling by a rolling mechanism, and the rolling pressure is 0.1-0.2MPa.

[0025] In one of the embodiments, the step S120 further comprises:

[0026] Step S125: pulling the reflective film strip and the isolation strip to a coinciding state, so that the reflective film strip is attached to the isolation strip to form the first composite; or, pulling the reflective film strip and the jumper wire to a coinciding state, so that the reflective film strip is attached to the jumper wire to form the first composite.

[0027] In one of the embodiments, the step S130 further comprises:

[0028] Step S135: when the first composite comprises the reflective film strip and the isolation strip, pulling the first composite and the jumper wire to a coinciding state, so that the first composite is attached to the jumper wire to form the second composite; when the first composite comprises the reflective film strip and the jumper wire, pulling the first composite and the isolation strip to a coinciding state, so that the first composite is attached to the isolation strip to form the second composite.

[0029] In one of the embodiments, during the formation of the first composite and the second composite, the positions of the reflective film strip, the isolation strip and the jumper wire are aligned.

[0030] In one of the embodiments, the step S110 specifically comprises:

[0031] Step S111: cutting the reflective film strip, the isolation strip and the jumper wire to a preset length.

[0032] In one of the embodiments, the width of the cut reflective film strip is W1, the width of the cut isolation strip is W2, and the width of the cut jumper wire is W3.

[0033] Wherein, 4.5mm≤W1≤9mm, 10mm≤W2≤20mm, 4mm≤W3≤8mm, and 0.5mm≤W1-W3≤1mm.

[0034] A photovoltaic module obtained by the photovoltaic module manufacturing method according to any one of the above technical solutions.

[0035] The photovoltaic module and the manufacturing method thereof are characterized in that: firstly, the reflective film tape is attached to the insulation strip or the jumper wire to form a first composite; then the first composite is attached to the jumper wire or the insulation strip to form a second composite; finally, the second composite is stacked and welded to the stack to form the photovoltaic module. The manufacturing method of the photovoltaic module provided in the application completes the lamination of the insulation strip, the reflective film tape and the jumper wire in the preparation process, avoids the interference of the stack on the jumper wire during the attachment of the reflective film tape, simplifies the film attachment operation of the jumper wire surface, improves the film attachment quality of the jumper wire surface, and since the reflective film tape is laminated between the insulation strip and the jumper wire, the reflective film tape can be seen on the front and back surfaces of the photovoltaic module, which can improve the photoelectric conversion efficiency and the aesthetic appearance of the photovoltaic module. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 The manufacturing method of the photovoltaic module provided in the application is shown in the flowchart.

[0037] Figure 2 The structure of the second composite provided in the application is shown in the structural diagram.

[0038] Figure 3 The structure of the second composite provided in the application is shown in the structural diagram.

[0039] Figure 4 The structure of the photovoltaic module provided in the application is shown in the structural diagram.

[0040] Figure 5 The structure of the module composed of the reflective film tape, the insulation strip and the jumper wire provided in the application is shown in the structural diagram.

[0041] Figure 6 The structure of the film attachment device provided in the application is shown in the structural diagram.

[0042] Figure 7 The attachment process of the first composite provided in the application is shown in the schematic diagram.

[0043] Figure 8 The attachment process of the second composite provided in the application is shown in the schematic diagram.

[0044] Figure 9 The attachment process of the first composite provided in the application is shown in the schematic diagram.

[0045] Figure 10 The attachment process of the second composite provided in the application is shown in the schematic diagram.

[0046] Reference signs:

[0047] 100, second composite;

[0048] 110, reflective film tape; 120, spacer; 130, jumper; 140, first composite;

[0049] 200, film pasting device;

[0050] 210, machine base; 220, first guide wheel set; 230, second guide wheel set; 240, pasting platform; 250, melting mechanism; 260, rolling mechanism; 270, first sliding module; 280, second sliding module;

[0051] 300, photovoltaic module; 310, cell string; 320, edge busbar; 330, middle busbar; 340, solder strip; 350, split cell; 360, sub cell string set; 370, cell string set; 371, first cell string set; 372, second cell string set; 373, third cell string set. DETAILED DESCRIPTION

[0052] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the spirit of the present application, and that the present application is not limited to the specific embodiments disclosed below.

[0053] In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0054] In addition, if the terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0055] In this application, unless otherwise explicitly specified and limited, if there are terms "mount", "connect", "connect", "fix", etc. These terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0056] In this application, unless otherwise explicitly specified and limited, if there are terms "mount", "connect", "connect", "fix", etc. These terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0057] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are for illustrative purposes only and are not the only embodiment.

[0058] The technical solutions provided by the embodiments of the present application are described below with reference to the accompanying drawings.

[0059] Referring to Figures 1-4 As shown in the drawings, the present application provides a photovoltaic module manufacturing method, the photovoltaic module manufacturing method comprising the following steps.

[0060] Step S110: providing the laminated piece, the reflective film strip 110, the isolation strip 120 and the jumper 130. In the process of providing the laminated piece, the reflective film strip 110, the isolation strip 120 and the jumper 130, the laminated piece, the reflective film strip 110, the isolation strip 120 and the jumper 130 need to be surface treated to remove dust, rust stains and other impurities attached to the surface of the laminated piece, the reflective film strip 110, the isolation strip 120 and the jumper 130, so as to ensure the subsequent coating quality of the reflective film strip 110 coated on the surface of the jumper 130. In the embodiment, the laminated piece includes the front cover plate, the front adhesive film and the battery string layer, the reflective film strip 110 has PET (Polyethylene terephthalate, polyester) as the base material and is compounded with EVA / EPE / PO structure; the isolation strip 120 has PET as the base material and is compounded with EVA / EPE / PO structure; the jumper 130 is a conductive metal strip, for example, the jumper 130 has pure copper or copper-aluminum composite metal as the base material and is coated with Sn60Pb40, Sn63Pb37, Sn43Pb43Bi14 or Sn32Pb42Bi26 coating on the surface of the jumper 130.

[0061] Step S120: the reflective film strip 110 is coated on the isolation strip 120 to form a first composite piece 140, as shown in FIG. 2A; or, the reflective film strip 110 is coated on the jumper 130 to form the first composite piece 140, as shown in FIG. 2B. When the reflective film strip 110 is coated on the jumper 130, the coating cross section of the reflective film strip 110 is greater than or equal to the coating cross section of the jumper 130, so that the reflective film strip 110 can completely cover the jumper 130, improve the film coating quality between the reflective film strip 110 and the jumper 130 and ensure the aesthetics of the photovoltaic module 300. Figure 2 Figure 3 Step S120: the reflective film strip 110 is coated on the isolation strip 120 to form a first composite piece 140, as shown in FIG. 2A; or, the reflective film strip 110 is coated on the jumper 130 to form the first composite piece 140, as shown in FIG. 2B. When the reflective film strip 110 is coated on the jumper 130, the coating cross section of the reflective film strip 110 is greater than or equal to the coating cross section of the jumper 130, so that the reflective film strip 110 can completely cover the jumper 130, improve the film coating quality between the reflective film strip 110 and the jumper 130 and ensure the aesthetics of the photovoltaic module 300.

[0062] Step S130: when the first composite piece 140 includes the reflective film strip 110 and the isolation strip 120, the first composite piece 140 is coated on the jumper 130 to form a second composite piece 100, as shown in FIG. 3A. When the first composite piece 140 includes the reflective film strip 110 and the jumper 130, the first composite piece 140 is coated on the isolation strip 120 to form the second composite piece 100, as shown in FIG. 3B. The second composite piece 100 includes the isolation strip 120, the reflective film strip 110 and the jumper 130 laminated, that is, the reflective film strip 110 is located between the isolation strip 120 and the jumper 130. Figure 2 Figure 3 Step S130: when the first composite piece 140 includes the reflective film strip 110 and the isolation strip 120, the first composite piece 140 is coated on the jumper 130 to form a second composite piece 100, as shown in FIG. 3A. When the first composite piece 140 includes the reflective film strip 110 and the jumper 130, the first composite piece 140 is coated on the isolation strip 120 to form the second composite piece 100, as shown in FIG. 3B. The second composite piece 100 includes the isolation strip 120, the reflective film strip 110 and the jumper 130 laminated, that is, the reflective film strip 110 is located between the isolation strip 120 and the jumper 130.

[0063] Step S140: the second composite piece 100 is spot-welded on the laminated piece to form the photovoltaic module 300.

[0064] ​​The photovoltaic module manufacturing method first pastes the reflective film strip 110 to the insulation strip 120 or the jumper 130 to form a first composite 140, then pastes the first composite 140 to the jumper 130 or the insulation strip 120 to form a second composite 100, and finally stacks and welds the second composite 100 to the stack to form the photovoltaic module 300. The photovoltaic module manufacturing method provided in the application completes the lamination process of the insulation strip 120, the reflective film strip 110 and the jumper 130 in the preparation process, avoids the interference of the stack on the jumper 130 during the lamination of the reflective film strip 110, simplifies the lamination operation of the reflective film strip 110 on the surface of the jumper 130, improves the lamination quality of the reflective film strip 110 on the surface of the jumper 130, and since the reflective film strip 110 is laminated between the insulation strip 120 and the jumper 130, the reflective film strip 110 can be seen on the front and back surfaces of the photovoltaic module 300, which can improve the photoelectric conversion efficiency and the appearance of the photovoltaic module 300.

[0065] In an embodiment, referring to Figures 1-3 The step S120 specifically includes:

[0066] The step S121: at least part of the reflective film strip 110 or at least part of the insulation strip 120 is melted to form a molten layer. Since the reflective film strip 110 and the insulation strip 120 both have PET as the base material and are compounded with the EVA / EPE / PO structure, melting the reflective film strip 110 or the insulation strip 120 can make at least part of the reflective film strip 110 or the insulation strip 120 become a molten state to form a molten layer.

[0067] The step S122: solidifying the molten layer, and rolling the reflective film strip 110 or the insulation strip 120 during the solidification process to make the reflective film strip 110 paste to the insulation strip 120 to form the first composite 140. The molten layer is solidified in the cold wind or the natural environment, and a rolling force is applied to the reflective film strip 110 or the insulation strip 120 during the solidification process to make the reflective film strip 110 paste to the insulation strip 120 to form the first composite 140.

[0068] Alternatively, the step S120 specifically includes:

[0069] The step S123: at least part of the reflective film strip 110 is melted to form a molten layer. Since the reflective film strip 110 has PET as the base material and is compounded with the EVA / EPE / PO structure, melting the reflective film strip 110 can make at least part of the reflective film strip 110 become a molten state to form a molten layer.

[0070] Step S124: solidifying the molten layer, and rolling the reflective film strip 110 or the jumper 130 during the solidification process to make the reflective film strip 110 adhere to the jumper 130 to form the first composite 140. In the solidification process, the molten layer is solidified under cold wind or natural environment, and a rolling force is applied to the reflective film strip 110 or the jumper 130 to make the reflective film strip 110 adhere to the jumper 130 to form the first composite 140.

[0071] Further, referring to Figures 1-3 As shown in FIG. 1, step S130 specifically includes:

[0072] Step S131: when the first composite 140 includes the reflective film strip 110 and the spacer 120, at least a part of a side of the first composite 140 away from the spacer 120 is molten to form a molten layer. Since the second composite 100 includes the spacer 120, the reflective film strip 110 and the jumper 130 arranged in layers, by forming the molten layer at least on the side of the first composite 140 away from the spacer 120, the subsequent operation of adhering the first composite 140 to the jumper 130 can be realized.

[0073] Step S132: solidifying the molten layer, and rolling the first composite 140 or the jumper 130 during the solidification process to make the first composite 140 adhere to the jumper 130 to form the second composite 100. In the solidification process, the molten layer is solidified under cold wind or natural environment, and a rolling force is applied to the first composite 140 or the jumper 130 to make the first composite 140 adhere to the jumper 130 to form the second composite 100.

[0074] Alternatively, step S130 specifically includes:

[0075] Step S133: when the first composite 140 includes the reflective film strip 110 and the jumper 130, at least a part of a side of the first composite 140 away from the jumper 130 is molten to form a molten layer. Since the second composite 100 includes the spacer 120, the reflective film strip 110 and the jumper 130 arranged in layers, by forming the molten layer at least on the side of the first composite 140 away from the jumper 130, the subsequent operation of adhering the first composite 140 to the spacer 120 can be realized.

[0076] Step S134: solidifying the molten layer, and rolling the first composite 140 or the spacer 120 during the solidification process to make the first composite 140 adhere to the spacer 120 to form the second composite 100. In the solidification process, the molten layer is solidified under cold wind or natural environment, and a rolling force is applied to the first composite 140 or the spacer 120 to make the first composite 140 adhere to the spacer 120 to form the second composite 100.

[0077] Further, referring to Figures 1-3 As shown, the melting layer is formed by hot air heating, and the solidification of the melting layer is completed by cold air solidification. The melting temperature is 300-500°C. If the melting temperature is too high, the reflective film strip 110 or the isolation strip 120 is easily changed into a fluid state during the melting process, which makes it difficult to control the setting quality of the reflective film strip 110 or the isolation strip 120 during the pasting process. If the melting temperature is too low, the melting layer is not easy to form during the melting process, and the subsequent pasting operation cannot be performed. Therefore, the melting temperature is set to 300-500°C, which can ensure that the pasting operation between the isolation strip 120, the reflective film strip 110 and the jumper 130 is smoothly performed, and the setting control of the reflective film strip 110 or the isolation strip 120 is facilitated during the subsequent solidification process. In a specific setting, the melting temperature can be any one of 300°C, 320°C, 340°C, 360°C, 380°C, 400°C, 420°C, 440°C, 460°C, 480°C and 500°C. The specific value of the melting temperature is not limited in the present application.

[0078] In addition, the melting air pressure is 0.2-0.5MPa. If the melting air pressure is too high, the melting rate of the reflective film strip 110 or the isolation strip 120 is too fast during the melting process of the reflective film strip 110 or the isolation strip 120, and it is difficult to control the melting layer state of the reflective film strip 110 or the isolation strip 120. If the melting air pressure is too low, the melting rate of the reflective film strip 110 or the isolation strip 120 is too slow during the melting process of the reflective film strip 110 or the isolation strip 120, and the reflective film strip 110 or the isolation strip 120 may be accompanied by slight solidification during the formation of the melting layer, which affects the subsequent pasting operation of the isolation strip 120, the reflective film strip 110 and the jumper 130. Therefore, the melting air pressure is set to 0.2-0.5MPa, which can control the formation rate of the melting layer and improve the pasting quality of the isolation strip 120, the reflective film strip 110 and the jumper 130. In a specific setting, the melting air pressure can be any one of 0.2MPa, 0.25MPa, 0.3MPa, 0.35MPa, 0.4MPa, 0.45MPa and 0.5MPa. The specific value of the melting air pressure is not limited in the present application.

[0079] Next, the curing air pressure is set to 0.1 MPa to 0.2 MPa. Since the isolation strip 120, reflective film tape 110, and jumper 130 need to be rolled and applied simultaneously during the curing process, if the curing air pressure is too high, the molten layer will cure too quickly, making the rolling and application difficult and affecting the application quality of the isolation strip 120, reflective film tape 110, and jumper 130. If the curing air pressure is too low, the molten layer will cure too slowly, resulting in the molten layer not being fully set after rolling and application, which will also affect the application quality of the isolation strip 120, reflective film tape 110, and jumper 130. Therefore, setting the curing air pressure to 0.1 MPa to 0.2 MPa controls the curing rate of the molten layer to accommodate the rolling and application rate without affecting the application quality of the isolation strip 120, reflective film tape 110, and jumper 130. In specific settings, the curing air pressure can be any one of 0.1MPa, 0.12MPa, 0.14MPa, 0.16MPa, 0.18MPa, or 0.2MPa. This application does not limit the specific value of the curing air pressure.

[0080] Furthermore, see Figures 1-3 As shown, the second composite component 100 is formed by roller pressing mechanism 260, wherein the roller pressing pressure is 0.1MPa~0.2MPa. During the forming of both the first composite component 140 and the second composite component 100, roller pressing force needs to be applied to the surfaces of the isolation strip 120, reflective film strip 110, or jumper 130 to ensure that the isolation strip 120, reflective film strip 110, and jumper 130 are stacked to form the first composite component 140 and the second composite component 100. If the roller pressing pressure is too high, it can easily cause roller pressing damage to the isolation strip 120, reflective film strip 110, and jumper 130 during the roller pressing process, affecting the photoelectric conversion efficiency and aesthetics of the subsequent photovoltaic module 300. If the roller pressing pressure is too low, the bonding effect between the isolation strip 120, reflective film strip 110, and jumper 130 will be poor, and delamination is likely to occur during long-term operation. Therefore, setting the rolling pressure to 0.1MPa~0.2MPa ensures that the isolation strip 120, reflective film strip 110, and jumper 130 will not be damaged during the rolling process, and also helps to improve the adhesion effect between the isolation strip 120, reflective film strip 110, and jumper 130. Specifically, the rolling pressure can be any one of 0.1MPa, 0.12MPa, 0.14MPa, 0.16MPa, 0.18MPa, and 0.2MPa; this application does not limit the specific value of the rolling pressure.

[0081] In one embodiment, see Figures 1-3As shown, step S120 further comprises step S125: pulling the reflective film strip 110 and the isolation strip 120 to the coinciding state, so that the reflective film strip 110 is attached to the isolation strip 120 to form the first composite 140; or, pulling the reflective film strip 110 and the jumper 130 to the coinciding state, so that the reflective film strip 110 is attached to the jumper 130 to form the first composite 140. It should be noted that, during the pulling process, the end of one side of the isolation strip 120, the reflective film strip 110 or the jumper 130 can be pulled, so that the heights of the two ends of the pulled object are inconsistent, the reflective film strip 110 is coincided with the isolation strip 120 or the jumper 130 by the lamination method, and no bubbles are generated between the two objects attached during the lamination process, thereby improving the attachment quality between the reflective film strip 110 and the isolation strip 120 or the jumper 130.

[0082] In an embodiment, referring to Figures 1-3 As shown, step S130 further comprises step S135: when the first composite 140 comprises the reflective film strip 110 and the isolation strip 120, the first composite 140 and the jumper 130 are pulled to the coinciding state, so that the first composite 140 is attached to the jumper 130 to form the second composite 100; when the first composite 140 comprises the reflective film strip 110 and the jumper 130, the first composite 140 and the isolation strip 120 are pulled to the coinciding state, so that the first composite 140 is attached to the isolation strip 120 to form the second composite 100. It should be noted that, during the pulling process, the end of one side of the first composite 140, the jumper 130 or the isolation strip 120 can be pulled, so that the heights of the two ends of the pulled object are inconsistent, the first composite 140 is coincided with the jumper 130 or the isolation strip 120 by the lamination method, and no bubbles are generated between the two objects attached during the lamination process, thereby improving the attachment quality between the first composite 140 and the jumper 130 or the isolation strip 120.

[0083] Further, referring to Figures 1-3 As shown, during the formation of the first composite 140 and the second composite 100, the positions of the reflective film strip 110, the isolation strip 120 and the jumper 130 are aligned. For example, during the attachment of the reflective film strip 110, the isolation strip 120 and the jumper 130, the CCD camera is used to take pictures of the objects to be attached, so as to ensure the position accuracy of the reflective film strip 110, the isolation strip 120 and the jumper 130 during the attachment process, so that the reflective film strip 110 is attached to the preset positions of the isolation strip 120 and the jumper 130, thereby improving the forming quality of the second composite 100.

[0084] In an embodiment, referring to Figures 1-3As shown, step S110 specifically includes step S111: cutting the reflective film tape 110, the isolation strip 120, and the jumper 130 to a preset length. In this way, the length of the reflective film tape 110, the isolation strip 120, and the jumper 130 is defined by cutting, so that the reflective film tape 110, the isolation strip 120, and the jumper 130 are attached in a preset length, further improving the attachment quality between the reflective film tape 110, the isolation strip 120, and the jumper 130.

[0085] Further, the participants Figures 1-5 As shown, the width of the cut reflective film tape 110 is W1, the width of the cut isolation strip 120 is W2, and the width of the cut jumper 130 is W3. Wherein, 4.5mm≤W1≤9mm, 10mm≤W2≤20mm, 4mm≤W3≤8mm, and 0.5mm≤W1-W3≤1mm. If the width of the isolation strip 120 is less than 10mm, the possibility of short circuit caused by the contact between the jumper 130 and the multi-sliced battery piece will increase. If the width of the isolation strip 120 is greater than 20mm, the area of the overlapping region between the isolation strip 120 and the multi-sliced battery piece will also increase, resulting in an increase in the influence of the isolation strip 120 on the multi-sliced battery piece during the lamination process. Therefore, the width of the isolation strip 120 can be any one of 10mm, 12mm, 14mm, 16mm, 18mm, and 20mm. Moreover, if the width of the jumper 130 is less than 4mm, the cross-sectional area of the jumper 130 is small, resulting in poor current carrying capacity of the jumper 130, which cannot carry the current in the photovoltaic module 300. If the width of the jumper 130 is greater than 8mm, the size of the overlapping region between the jumper 130 and the multi-sliced battery piece increases, and the risk of the multi-sliced battery piece being cracked by the jumper 130 during the lamination process increases. If the photovoltaic module 300 is a double-glass module, both sides of the multi-sliced battery piece are used to absorb sunlight, and the width of the jumper 130 is too large, which increases the shading of the multi-sliced battery piece, thereby affecting the power generation efficiency. Therefore, the width of the jumper 130 can be any one of 4mm, 5mm, 6mm, 7mm, and 8mm. Then, 0.5mm≤W1-W3≤1mm is set, so that the width of the cut reflective film tape 110 is slightly larger than the width of the jumper 130, which can avoid the phenomenon that the reflective film tape 110 cannot cover the jumper 130 due to the attachment displacement caused by the deviation of the reflective film tape 110 and the jumper 130, thereby improving the attachment quality between the reflective film tape 110 and the jumper 130 and ensuring the aesthetics of the photovoltaic module 300. The width of the cut reflective film tape 110 can be any one of 4.5mm, 5mm, 6mm, 7mm, 8mm, and 9mm, and the value of W1-W3 can be any one of 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, and 1mm.

[0086] Preferably, the thickness of the cutting isolation strip 120 is 0.1mm-0.8mm, the thickness of the cutting reflective film strip 110 is 0.05mm-0.4mm, and the thickness of the cutting jumper 130 is 0.1mm-0.4mm. If the thickness of the isolation strip 120 is greater than 0.8mm, the thickness of the jumper 130 and the isolation strip 120 is too large, and the stress at the position of the jumper 130 is large during the lamination process, which can easily cause hidden cracks in the multi-slice battery piece. The isolation strip 120 plays an insulating role between the jumper 130 and the multi-slice battery piece, and the insulation performance of the isolation strip 120 decreases as the thickness of the isolation strip 120 decreases. If the thickness of the isolation strip 120 is less than 0.1mm, the insulation performance of the isolation strip 120 is poor, and the possibility of short circuit between the jumper 130 and the multi-slice battery piece is large. Therefore, the thickness of the isolation strip 120 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.6mm, 0.7mm, 0.8mm, etc. If the thickness of the jumper 130 is greater than 0.4mm, the size of the jumper 130 protruding from the multi-slice battery piece is large, which can increase the possibility of the jumper 130 extruding the multi-slice battery piece during the lamination process, causing hidden cracks in the multi-slice battery piece, and also increase the possibility of deformation of the jumper 130, causing the jumper 130 to contact the multi-slice battery piece and cause short circuit. Therefore, the thickness of the jumper 130 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, etc. In addition, the thickness of the reflective film strip 110 can be 0.05mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, etc.

[0087] For the above photovoltaic module manufacturing method, referring to Figures 6-10 As shown in FIG. 10, the present application provides a film pasting device 200, which comprises a machine base 210, a first guide wheel set 220, a second guide wheel set 230, a pasting platform 240, a melting mechanism 250, and a rolling mechanism 260. The film pasting device 200 is used for pasting the reflective film strip 110 on the surface of the jumper 130 to form a second composite 100 by stacking the isolation strip 120, the reflective film strip 110, and the jumper 130. The stacking and pasting process of the isolation strip 120, the reflective film strip 110, and the jumper 130 is completed during the preparation process, which avoids the interference of the stacked parts on the jumper 130 during the pasting of the reflective film strip 110, simplifies the film pasting operation of the reflective film strip 110 on the surface of the jumper 130, and improves the film pasting quality of the jumper 130. Since the reflective film strip 110 is stacked between the isolation strip 120 and the jumper 130, the reflective film strip 110 can be seen on the front and back surfaces of the photovoltaic module 300, which can improve the photoelectric conversion efficiency and the appearance of the photovoltaic module 300.

[0088] The first guide wheel set 220 is arranged on the machine base 210, and includes a plurality of first guide wheels arranged at intervals. The first guide wheel set 220 is used for guiding the reflective film tape 110 and the first composite 140 to be wound. The second guide wheel set 230 is arranged on the machine base 210, and includes a plurality of second guide wheels arranged at intervals. The second guide wheel set 230 is used for guiding the isolation strip 120 and the jumper 130 to be wound. The laminating platform 240 is arranged on the machine base 210, and is used for laminating the first composite 140 and the second composite 100. The melting mechanism 250 is arranged on the machine base 210, and can blow hot air towards the laminating platform 240. The hot air blown by the melting mechanism 250 is used for melting the reflective film tape 110, the isolation strip 120 or the first composite 140, so as to form a melting layer. The rolling mechanism 260 is arranged on the machine base 210, and is used for rolling the first composite 140 or the second composite 100 on the laminating platform 240.

[0089] For example, as in one of the embodiments, referring to Figures 6-8As shown, first, the reflective film tape 110 is wound around the first guide roller set 220, and the reflective film tape 110 is conveyed to the lamination platform 240 by the first guide roller set 220, and the isolation strip 120 is wound around the second guide roller set 230, and the isolation strip 120 is conveyed to the lamination platform 240 by the second guide roller set 230; then, the melting mechanism 250 blows hot air towards the surface of the reflective film tape 110 or the isolation strip 120, so as to at least partially melt the reflective film tape 110 or the isolation strip 120 to form a molten layer, and the melting temperature is 300-500°C, and the melting air pressure is 0.2-0.5MPa; then, the molten layer is solidified, and in the solidification process, the reflective film tape 110 or the isolation strip 120 is rolled by the rolling mechanism 260, the rolling pressure applied to the surface of the reflective film tape 110 or the isolation strip 120 by the rolling mechanism 260 is 0.1-0.2MPa, so that the reflective film tape 110 is laminated to the isolation strip 120 to form the first composite 140; continuing, the first composite 140 is wound around the first guide roller set 220, and the first composite 140 is conveyed to the lamination platform 240 by the first guide roller set 220, and the jumper wire 130 is wound around the second guide roller set 230, and the jumper wire 130 is conveyed to the lamination platform 240 by the second guide roller set 230; and, the melting mechanism 250 blows hot air towards the side of the first composite 140 away from the isolation strip 120, so as to at least partially melt the side of the first composite 140 away from the isolation strip 120 to form a molten layer, and the melting temperature is 300-500°C, and the melting air pressure is 0.2-0.5MPa; then, the molten layer is solidified, and in the solidification process, the first composite 140 or the jumper wire 130 is rolled by the rolling mechanism 260, the rolling pressure applied to the surface of the first composite 140 or the jumper wire 130 by the rolling mechanism 260 is 0.1-0.2MPa, so that the first composite 140 is laminated to the jumper wire 130 to form the second composite 100.

[0090] For example, in another embodiment, referring to Figure 6 、 Figure 9 and Figure 10As shown, first, the reflective film tape 110 is wound around the first guide roller set 220, and the reflective film tape 110 is conveyed to the coating platform 240 by the first guide roller set 220, and the jumper wire 130 is wound around the second guide roller set 230, and the jumper wire 130 is conveyed to the coating platform 240 by the second guide roller set 230; then, the melting mechanism 250 blows hot air towards the surface of the reflective film tape 110 to at least partially melt the reflective film tape 110 to form a molten layer, and the melting temperature is ensured to be 300-500°C, and the melting air pressure is 0.2-0.5MPa; next, the molten layer is solidified, and in the solidification process, the reflective film tape 110 or the jumper wire 130 is rolled by the rolling mechanism 260, and the rolling pressure applied by the rolling mechanism 260 to the surface of the reflective film tape 110 or the jumper wire 130 is 0.1-0.2MPa, so that the reflective film tape 110 is coated on the jumper wire 130 to form the first composite 140; continuing, the first composite 140 is wound around the first guide roller set 220, and the first composite 140 is conveyed to the coating platform 240 by the first guide roller set 220, and the isolation strip 120 is wound around the second guide roller set 230, and the isolation strip 120 is conveyed to the coating platform 240 by the second guide roller set 230; and, the melting mechanism 250 blows hot air towards the side of the first composite 140 away from the jumper wire 130 to at least partially melt the side of the first composite 140 away from the jumper wire 130 to form a molten layer, and the melting temperature is ensured to be 300-500°C, and the melting air pressure is 0.2-0.5MPa; next, the molten layer is solidified, and in the solidification process, the first composite 140 or the isolation strip 120 is rolled by the rolling mechanism 260, and the rolling pressure applied by the rolling mechanism 260 to the surface of the first composite 140 or the isolation strip 120 is 0.1-0.2MPa, so that the first composite 140 is coated on the isolation strip 120 to form the second composite 100.

[0091] It should be noted that, in the embodiment, the film coating device 200 further comprises a first sliding module 270 and a second sliding module 280. At least one first guide roller in the first guide roller set 220 is slidingly arranged in the first sliding module 270, and the position of the first guide roller is adjusted by sliding the first sliding module 270 to adjust the tension of the reflective film tape 110 or the first composite 140 in the conveying process. At least one second guide roller in the second guide roller set 230 is slidingly arranged in the second sliding module 280, and the position of the second guide roller is adjusted by sliding the second sliding module 280 to adjust the tension of the isolation strip 120 or the jumper wire 130 in the conveying process.

[0092] In addition, referring to Figures 2-4As shown, this application also provides a photovoltaic module 300, which is obtained by the photovoltaic module manufacturing method described above. This photovoltaic module manufacturing method can be used to form a multi-cell photovoltaic module 300. For example, the photovoltaic module manufacturing method described above can form photovoltaic modules 300 with structures such as three-cell, four-cell, and five-cell. Specifically, after stacking the separator strip 120, reflective film strip 110, and jumper wire 130 to form a second composite component 100, the second composite component 100 is welded to the stacked component. Then, the backing film and back sheet are placed, and the photovoltaic module 300 is formed through processes such as lamination and framing. The photovoltaic module 300 includes multiple cell strings 310, multiple edge busbars 320, multiple middle busbars 330, and multiple jumper wires 130. The cell strings 310 include multiple cell segments 350 connected in series by solder strips 340. Among them, the jumper 130 is provided with an isolation strip 120 to avoid the adverse effects of short circuit caused by contact between the jumper 130 and the adjacent battery string 310, and a reflective film strip 110 is attached between the jumper 130 and the isolation strip 120 to improve the photoelectric conversion efficiency and aesthetics of the photovoltaic module 300.

[0093] In this embodiment, taking a four-segment photovoltaic module 300 as an example, the width direction of the photovoltaic module 300 is defined as the first direction (i.e., Figure 4 (as shown in the X direction), the length direction of the photovoltaic module 300 is defined as the second direction (i.e., Figure 4 (As shown in the Y direction), the first direction X and the second direction Y are perpendicular to each other. Two battery strings 310 are arranged at intervals along the second direction Y to form a sub-battery string group 360, and two sub-battery string groups 360 are arranged at intervals along the first direction X to form a battery string group 370. The four battery strings 310 in each battery string group 370 can be connected in parallel. Each battery string 310 includes multiple segmented batteries 350, and all segmented batteries 350 of the same battery string 310 are arranged along the second direction Y and can be connected in series. Each intermediate bus bar 330 is located between two battery strings 310 of the same sub-battery string group 360 in the second direction Y, and each intermediate bus bar 330 extends along the first direction X. Each battery string group 370 has an edge bus bar 320 at both opposite ends in the second direction Y, and each edge bus bar 320 extends along the first direction X. The end of each battery string 310 away from the intermediate bus bar 330 is connected to the edge bus bar 320. A portion of the jumper 130 is connected to the edge busbar 320, and another portion is connected to an external device via a junction box. Specifically, in some embodiments, the edge busbar 320, the middle busbar 330, and the jumper 130 are all formed of conductive metal strips.

[0094] For example, see Figure 4 As shown, the photovoltaic module 300 includes three sets of cell strings 370 arranged at intervals along a first direction X. Figure 4The first, second and third battery string groups 371, 372 and 373 are defined from left to right, respectively. Each battery string group 370 includes two sub battery string groups 360 arranged in the first direction X (i.e., the photovoltaic module 300 includes six sub battery string groups 360). Of course, in other possible embodiments, the photovoltaic module 300 can also be formed into other forms of specification modules by a plurality of split cells 350, and the specific version of the photovoltaic module 300 is not limited in the present application.

[0095] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not result in a contradiction, it should be considered as within the scope of the present disclosure.

[0096] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that, for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A method for manufacturing photovoltaic modules, characterized in that, The photovoltaic module manufacturing method includes: Step S110: Provide laminated components, reflective film tape, spacer strips, and jumper wires; Step S120: The reflective film strip is applied to the isolation strip to form a first composite; or, the reflective film strip is applied to the jumper to form the first composite, and the first composite is formed by melt curing. Step S130: When the first composite component includes the reflective film strip and the isolation strip, the first composite component is attached to the jumper to form a second composite component; when the first composite component includes the reflective film strip and the jumper, the first composite component is attached to the isolation strip to form a second composite component; wherein, the second composite component includes the isolation strip, the reflective film strip, and the jumper, which are stacked together, and the second composite component is formed by melt curing; Step S140: The second composite component is laminated to the laminate to form a photovoltaic module.

2. The photovoltaic module manufacturing method according to claim 1, characterized in that, Step S120 specifically includes: Step S121: At least part of the reflective film strip or at least part of the isolation strip melts to form a molten layer; Step S122: Solidify the molten layer, and during the solidification process, roll the reflective film strip or the isolation strip so that the reflective film strip is attached to the isolation strip to form the first composite; or; Step S123: The reflective film strip is at least partially melted to form a molten layer; Step S124: Solidify the molten layer, and during the solidification process, roll the reflective film tape or the jumper wire to make the reflective film tape adhere to the jumper wire to form the first composite.

3. The photovoltaic module manufacturing method according to claim 1, characterized in that, Step S130 specifically includes: Step S131: When the first composite component includes the reflective film strip and the isolation strip, at least part of the side of the first composite component facing away from the isolation strip is melted to form a molten layer; Step S132: Solidify the molten layer, and during the solidification process, roll the first composite or the jumper wire so that the first composite is attached to the jumper wire to form the second composite; or; Step S133: When the first composite component includes the reflective film strip and the jumper cord, at least part of the side of the first composite component facing away from the jumper cord is melted to form a molten layer; Step S134: Curing the molten layer, and during the curing process, rolling the first composite or the isolation strip so that the first composite is attached to the isolation strip to form the second composite.

4. The method for manufacturing photovoltaic modules according to any one of claims 2 or 3, characterized in that, The molten layer is formed by heating with hot air, and the solidification of the molten layer is completed by cold air. The melting temperature is 300℃~500℃, the melting air pressure is 0.2MPa~0.5MPa, and the curing air pressure is 0.1MPa~0.2MPa.

5. The method for manufacturing a photovoltaic module according to any one of claims 2 or 3, characterized in that, The second composite component is formed by rolling through a rolling mechanism, wherein the rolling pressure is 0.1MPa~0.2MPa.

6. The photovoltaic module manufacturing method according to claim 1, characterized in that, Step S120 further includes: Step S125: Pull the reflective film strip and the isolation strip to overlap, so that the reflective film strip is attached to the isolation strip to form the first composite; or, pull the reflective film strip and the jumper to overlap, so that the reflective film strip is attached to the jumper to form the first composite.

7. The photovoltaic module manufacturing method according to claim 1, characterized in that, Step S130 further includes: Step S135: When the first composite component includes the reflective film strip and the isolation strip, pull the first composite component and the jumper to an overlapping state, so that the first composite component is attached to the jumper to form the second composite component; when the first composite component includes the reflective film strip and the jumper, pull the first composite component and the isolation strip to an overlapping state, so that the first composite component is attached to the isolation strip to form the second composite component.

8. The method for manufacturing a photovoltaic module according to any one of claims 6 or 7, characterized in that, During the formation of the first composite and the second composite, the reflective film strip, the isolation strip, and the jumper are aligned.

9. The method for manufacturing photovoltaic modules according to claim 1, characterized in that, Step S110 specifically includes: Step S111: Cut the reflective film strip, the isolation strip, and the jumper wire to a preset length.

10. The method for manufacturing a photovoltaic module according to claim 9, characterized in that, The width of the cut reflective film strip is W1, the width of the cut isolation strip is W2, and the width of the cut jumper is W3; Among them, 4.5mm≤W1≤9mm, 10mm≤W2≤20mm, 4mm≤W3≤8mm, and 0.5mm≤W1-W3≤1mm.

11. A photovoltaic module, characterized in that, The photovoltaic module is obtained by the photovoltaic module manufacturing method as described in any one of claims 1-10.

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