Photovoltaic backboard preparation method and device

Abstract

The invention discloses a photovoltaic backboard preparation method and equipment, and the method comprises the steps: at least obtaining a conductive layer with a graphic structure on the surface, the graphic structure having a part needing to be separated, and at least the part needing to be separated in the conductive layer being not connected with a backboard; blowing the part to be separated in the conductive layer; and separating the part to be separated in the conductive layer. In the embodiment of the invention, in the process of blowing air to the to-be-separated part in the conductive layer and separating the to-be-separated part in the conductive layer, the to-be-separated part is not connected with the back plate, so that the to-be-separated part is easy to blow away and separate, and the to-be-separated part is not easy to break.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a method and equipment for preparing a photovoltaic backplane. Background Art

[0002] When the cells in the photovoltaic module adopt back-contact cells, the cells can be electrically connected through a conductive backplane, which usually includes a metal conductive layer, an adhesive film and a backplane.

[0003] In the related art, the preparation process of the conductive backplane includes: firstly hot pressing the complete metal conductive layer, the adhesive film and the backplane together, then preparing a graphic structure on the metal conductive layer, and finally peeling off the redundant area in the graphic structure.

[0004] However, since the metal conductive layer is firmly bonded to the backplane, when the redundant area in the graphic structure is peeled off, the redundant area is easily broken and difficult to peel off. Summary of the invention

[0005] The present invention provides a method and equipment for preparing a photovoltaic backplane, aiming to at least solve the technical problem in the prior art that when peeling off the excess area in a graphic structure, the excess area is easy to break and difficult to peel off.

[0006] In a first aspect, an embodiment of the present invention provides a method for preparing a photovoltaic backplane, comprising:

[0007] At least a conductive layer having a pattern structure on its surface is obtained, wherein the pattern structure has a portion to be separated, and at least the portion to be separated in the conductive layer is not connected to the backplane;

[0008] Blowing air to the portion to be separated in the conductive layer;

[0009] The portion to be separated in the conductive layer is separated.

[0010] Optionally, blowing air to the portion to be separated in the conductive layer comprises:

[0011] Blowing the portion to be separated in the conductive layer by means of an oscillating blowing component;

[0012] Wherein, the oscillating blowing component comprises a blowing nozzle which can perform periodic reciprocating motion.

[0013] Optionally, separating the portion to be separated in the conductive layer includes:

[0014] clamping the portion to be separated from the conductive layer that is blown away;

[0015] The portion to be separated and the portion to be retained of the conductive layer are moved relative to each other, so as to separate the portion to be separated in the conductive layer.

[0016] Optionally, the step of causing the portion to be separated and the portion to be retained of the conductive layer to move relative to each other comprises:

[0017] The portion to be separated is transported in a direction away from the portion to be retained of the conductive layer.

[0018] Optionally, the step of obtaining at least a conductive layer having a patterned structure on the surface includes:

[0019] Only a conductive layer with a patterned structure on the surface is obtained;

[0020] After separating the part to be separated in the conductive layer, the method further comprises:

[0021] The separated conductive layer and the back plate provided with the adhesive layer are pressed together to obtain a photovoltaic back plate.

[0022] Optionally, before obtaining at least a conductive layer having a patterned structure on the surface, the method comprises:

[0023] Partially pressing the portion of the conductive layer to be retained and the back plate provided with the adhesive layer;

[0024] The step of obtaining at least a conductive layer having a patterned structure on the surface comprises:

[0025] Obtaining a partially pressed conductive layer, an adhesive layer and a backplane;

[0026] A pattern structure is formed on the surface of the conductive layer.

[0027] In a second aspect, an embodiment of the present invention provides a photovoltaic backplane manufacturing device, comprising:

[0028] A blowing device, the blowing device is used to blow air to the part to be separated in the graphic structure in the conductive layer, wherein at least the part to be separated in the conductive layer is not connected to the backplane;

[0029] A separation device is used to separate the part to be separated from the conductive layer.

[0030] Optionally, the blowing device comprises an oscillating blowing assembly, and the oscillating blowing assembly comprises a blowing nozzle which can perform periodic reciprocating motion.

[0031] Optionally, along the thickness direction of the conductive layer, the distance between the blowing device and the conductive layer is greater than or equal to 55 mm.

[0032] Optionally, the flow rate of the air flow blown out by the blowing device is greater than or equal to 600 L / min and less than or equal to 750 L / min.

[0033] Optionally, the photovoltaic backplane preparation equipment further includes a first carrier, and the first carrier is at least used to absorb the conductive layer, and the conductive layer is located under the first carrier.

[0034] Optionally, the separation device comprises a clamping and separation component, and the clamping and separation component is located below the first carrier;

[0035] The clamping and separating assembly comprises two clamping rollers which are arranged opposite to each other and rotate towards each other.

[0036] Optionally, along the thickness direction of the conductive layer, the distance between the clamping and separating component and the conductive layer is greater than the length of the finger-shaped conductive part in the graphic structure.

[0037] Optionally, the clamping and separation assembly further includes an anti-winding mechanism;

[0038] The anti-winding mechanism comprises two auxiliary rollers and two transmission belts, and a single transmission belt is wound around the auxiliary roller and the clamping roller located on the same side of the clamping and separation component along the arrangement direction of the two clamping rollers.

[0039] Optionally, the separation device comprises a clamping assembly, the clamping assembly is located below the first carrier, and the clamping assembly is used to clamp the portion to be separated in the blown-off conductive layer;

[0040] The separation device further comprises a separation driving member, wherein the separation driving member is used to drive the clamping assembly to move; and / or the first carrier comprises a transmission assembly, wherein the transmission assembly is used to transmit and adsorb the conductive layer.

[0041] Optionally, the clamping assembly includes a first clamping strip and a second clamping strip;

[0042] The clamping assembly further includes a clamping driving member, and the clamping driving member is used to drive the first clamping bar or the second clamping bar to move along the length direction of the first clamping bar;

[0043] The first clamping strip and the second clamping strip are stacked, the first clamping strip is provided with a plurality of clamping grooves along the length direction of the first clamping strip, and the second clamping strip includes a plurality of clamping hooks arranged at intervals along the length direction of the first clamping strip;

[0044] Alternatively, the first clamping bar and the second clamping bar respectively include a plurality of first clamping jaws and a plurality of second clamping jaws arranged at intervals along the length direction of the first clamping bar, and the first clamping jaws and the second clamping jaws are arranged alternately along the length direction of the first clamping bar.

[0045] Optionally, the separation device comprises a rolling brush, and the rolling brush is used to contact a side of the conductive layer facing away from the first carrier.

[0046] Optionally, the photovoltaic backsheet preparation equipment further comprises a local pressing device, and the local pressing device is used to locally press the portion of the conductive layer to be retained and the backsheet provided with the adhesive layer;

[0047] The local pressing device comprises an upper pressing plate and a lower pressing plate, the upper pressing plate is provided with a first avoidance groove, and / or the lower pressing plate is provided with a second avoidance groove.

[0048] In the embodiment of the present invention, during the process of blowing air to the part to be separated in the conductive layer and separating the part to be separated in the conductive layer, the part to be separated is not connected to the back plate, so it is easy to blow away and separate the part to be separated, and the part to be separated is not easy to break, which can improve the waste removal efficiency and avoid the problem that the excess area in the pattern structure is easy to break and difficult to peel off due to the strong adhesion between the metal conductive layer and the back plate. In addition, in this embodiment, since the part to be separated is not easy to break, the width of the part to be separated can be reduced. After the width of the part to be separated is reduced, the resistivity of the photovoltaic back plate can be reduced, and the conductivity of the photovoltaic back plate can be improved, thereby improving the power of the photovoltaic module including the photovoltaic back plate.

[0049] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A flowchart of a method for preparing a photovoltaic backplane provided by an embodiment of the present invention;

[0051] Figure 2 A schematic diagram of the structure of a conductive layer provided by an embodiment of the present invention;

[0052] Figure 3 A flowchart of another method for preparing a photovoltaic backsheet provided by an embodiment of the present invention;

[0053] Figure 4 A flowchart of the steps of another method for preparing a photovoltaic backsheet provided by an embodiment of the present invention;

[0054] Figure 5 A schematic diagram of the structure of an oscillating blowing assembly and a clamping assembly in a photovoltaic backplane preparation device provided in an embodiment of the present invention Figure 1 ;

[0055] Figure 6 A schematic diagram of the structure of an oscillating blowing assembly and a clamping assembly in a photovoltaic backplane preparation device provided in an embodiment of the present invention Figure 2 ;

[0056] Figure 7 A schematic diagram of the structure of an oscillating blowing assembly and a clamping assembly in a photovoltaic backplane preparation device provided in an embodiment of the present invention Figure 3 ;

[0057] Figure 8 A partial structural schematic diagram of a first clamping bar and a second clamping bar in another clamping assembly in a photovoltaic backsheet preparation device provided in an embodiment of the present invention;

[0058] Fig. 9 A schematic structural diagram of a first carrier and a conductive layer in a photovoltaic backplane manufacturing device provided in an embodiment of the present invention;

[0059] Fig.10 A schematic structural diagram of a clamping and separating component in a photovoltaic backsheet preparation device provided in an embodiment of the present invention;

[0060] Fig.11 A schematic structural diagram of another clamping and separating component in a photovoltaic backsheet preparation device provided in an embodiment of the present invention;

[0061] Fig.12 A schematic diagram of the structure of a roller brush in a photovoltaic backsheet preparation device provided in an embodiment of the present invention;

[0062] Fig.13 A schematic structural diagram of a local pressing device in a photovoltaic backsheet manufacturing device provided in an embodiment of the present invention;

[0063] Fig.14 A schematic structural diagram of an upper pressing plate in a local pressing device in a photovoltaic backsheet manufacturing device provided in an embodiment of the present invention;

[0064] Fig.15 A schematic structural diagram of a lower pressing plate in a local pressing device in a photovoltaic backsheet manufacturing device provided in an embodiment of the present invention;

[0065] Fig.16 A schematic diagram of the structure of a second carrier and an adsorption cover provided in an embodiment of the present invention;

[0066] Fig.17 A schematic structural diagram of a second carrier and a nozzle assembly provided in an embodiment of the present invention.

[0067] Reference numerals:

[0068] 1-conductive layer, 11-part to be separated, 12-part to be retained, 121-finger-shaped conductive part, 2-first carrier, 3-oscillating blowing assembly, 31-blowing nozzle, 32-blowing nozzle fixing block, 33-first bracket, 34-blowing drive, 35-second bracket, 36-first guide rail slider mechanism, 4-rolling brush, 5-gripping assembly, 51-first clamping strip, 511-clamping groove, 52-second clamping strip, 521-clamping hook, 5 3- clamping drive member, 54- second guide rail slider mechanism, 6- second carrier, 7- clamping separation component, 71- clamping roller, 72- auxiliary roller, 73- transmission belt, 74- driving motor, 75- transmission mechanism, 8- local pressing device, 81- upper pressure plate, 811- first avoidance groove, 812- protrusion, 82- lower pressure plate, 821- lower pressure surface, 822- second avoidance groove, 9- adsorption cover, 10- nozzle assembly. DETAILED DESCRIPTION

[0069] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0070] First, refer to Figure 1 The embodiment of the present invention discloses a method for preparing a photovoltaic backplane, and the method for preparing a photovoltaic backplane comprises:

[0071] Step 101, obtaining at least a conductive layer having a pattern structure on the surface.

[0072] Among them, refer to Figure 2 The surface of the conductive layer 1 has a graphic structure, and the graphic structure has a portion 11 to be separated, and at least the portion 11 to be separated in the conductive layer 1 is not connected to the backplane. The portion 11 to be separated is also the redundant portion in the graphic structure that needs to be removed. The material of the conductive layer 1 is determined specifically according to the material cost and the conductivity requirements. The material of the conductive layer 1 can be a pure conductive material, or it can be a composite conductive material formed by multiple materials through electroplating, evaporation, chemical plating, etc. Considering the cost and conductivity, the thickness of the conductive layer 1 can be 0.01mm-50mm.

[0073] The pattern style of the graphic structure in the conductive layer can be designed based on the electrode structure on the back side of the back contact cell. The pattern style is a graphic that can form electrical isolation, so that short circuit phenomenon during interconnection can be avoided. The specific design style of the graphic structure is not specifically limited in the embodiment of the present invention. After the graphic structure is depicted, there is an extra part 11 that needs to be separated and needs to be separated from the conductive layer, so as to form a graphic structure that can be used for subsequent electrical connection.

[0074] In one embodiment, obtaining at least a conductive layer having a patterned structure on its surface may include: obtaining only a conductive layer having a patterned structure on its surface. In another embodiment, obtaining at least a conductive layer having a patterned structure on its surface may include: obtaining a partially pressed conductive layer, an adhesive layer, and a backplane; and forming a patterned structure on the surface of the conductive layer.

[0075] Step 102, blowing air to the portion to be separated in the conductive layer.

[0076] The portion to be separated 11 in the conductive layer 1 may be blown by a blowing device. The direction of the airflow blown by the blowing device may be from bottom to top. When blowing the portion to be separated 11 in the conductive layer 1, the conductive layer 1 may be adsorbed on the first carrier 2, the conductive layer 1 is located below the first carrier 2, and the blowing device is located below the first carrier 2.

[0077] Step 103, separating the portion to be separated in the conductive layer.

[0078] The part to be separated in the conductive layer can be separated by a separation device, which can include any one of a clamping component 5 , a clamping and separation component 7 , and a rolling brush 4 .

[0079] The photovoltaic backplane preparation process includes a waste removal process, which is a process for removing the portion to be separated 11 in the conductive layer 1. In this embodiment, the waste removal process may include blowing air to the portion to be separated in the conductive layer and separating the portion to be separated 11 in the conductive layer 1. The portion to be separated 11 is usually in the form of a thinner wire, so the portion to be separated 11 can also be called waste wire. The thinner the width of the portion to be separated 11, the stronger the conductivity of the photovoltaic backplane. The width of the portion to be separated 11 can be 0.05mm-10mm.

[0080] In the embodiment of the present invention, during the process of blowing air to the part 11 to be separated in the conductive layer 1 and separating the part 11 to be separated in the conductive layer 1, the part 11 to be separated is not connected to the back plate, so it is easy to blow away and separate the part 11 to be separated, and the part 11 to be separated is not easy to break, which can improve the waste removal efficiency and avoid the problem that the excess area in the pattern structure is easy to break and difficult to peel off due to the strong adhesion between the metal conductive layer and the back plate. In addition, in this embodiment, since the part 11 to be separated is not easy to break, the width of the part 11 to be separated can be reduced. After the width of the part 11 to be separated is reduced, the resistivity of the photovoltaic back plate can be reduced, and the conductivity of the photovoltaic back plate can be improved, thereby improving the power of the photovoltaic module including the photovoltaic back plate.

[0081] In an optional embodiment of the present invention, step 101, blowing air to the portion to be separated in the conductive layer, includes: blowing air to the portion to be separated in the conductive layer by an oscillating blowing component.

[0082] The oscillating blowing assembly 3 includes a nozzle 31 that can reciprocate periodically. The oscillating blowing assembly 3 includes a plurality of nozzles 31, and the plurality of nozzles 31 are respectively connected to the first bracket 33 through a plurality of nozzle fixing blocks 32. The nozzles 31 specifically reciprocate periodically along the length direction of the first bracket 33. In this embodiment, blowing through the nozzle 31 that can reciprocate periodically can enhance the blowing effect, make it easier to blow away the part 11 to be separated, and avoid the part 11 to be separated from the part 12 to be retained.

[0083] In an optional embodiment of the present invention, step 103, separating the portion to be separated in the conductive layer, includes: clamping the portion to be separated in the blown-off conductive layer; and making the portion to be separated and the portion to be retained in the conductive layer move relative to each other to separate the portion to be separated in the conductive layer.

[0084] Among them, the portion 12 to be retained of the conductive layer 1 is also the portion to be retained in the conductive layer 1. The portion to be separated in the blown-away conductive layer can be clamped by the clamping component 5 and the clamping separation component 7. The portion to be separated can be moved, or the conductive layer 1 itself can be moved, so that the portion to be separated and the portion to be retained of the conductive layer can move relative to each other. After the blowing device blows away the portion 11 to be separated, the end of the portion 11 to be separated may adhere to the portion 12 to be retained. By clamping and separating the portion 11 to be separated after blowing, the portion 11 to be separated and the portion 12 to be retained can be completely separated, thereby improving the overall waste removal rate.

[0085] In an optional embodiment of the present invention, causing the portion to be separated and the portion to be retained of the conductive layer to move relative to each other includes: transporting the portion to be separated in a direction away from the portion to be retained of the conductive layer.

[0086] The separation device includes a clamping and separation component 7, which is located below the first carrier 2; the clamping and separation component 7 includes two clamping rollers 71 that are arranged opposite to each other and rotate in opposite directions. The clamping and separation component also includes an anti-winding mechanism; the anti-winding mechanism includes two auxiliary rollers 72 and two transmission belts 73, and a single transmission belt 73 is wound around the auxiliary roller 72 and the clamping roller 71 located on the same side of the arrangement direction of the two clamping rollers 71 of the clamping and separation component 7. Specifically, the part 11 to be separated can be transmitted in a direction away from the part 12 to be retained of the conductive layer 1 through the transmission belt 73 to prevent the part 11 to be separated from being wound around the clamping roller 71.

[0087] In an alternative embodiment of the present invention, referring to Figure 3, an embodiment of the present invention discloses another method for preparing a photovoltaic backplane, the method for preparing a photovoltaic backplane comprising:

[0088] Step 201, obtaining only a conductive layer having a pattern structure on the surface;

[0089] Step 202, blowing air to the portion to be separated in the conductive layer;

[0090] Step 203, separating the portion to be separated in the conductive layer;

[0091] Step 204, pressing the separated conductive layer and the back sheet provided with the adhesive layer together to obtain a photovoltaic back sheet.

[0092] Among them, obtaining only the conductive layer with a pattern structure on the surface may include: drawing out a continuous conductive layer from one end of the conductive layer coil and cutting it to form a conductive layer; laser engraving the conductive layer to form a pattern structure on the surface of the conductive layer. It should be noted that the pattern structure can also be formed on the surface of the conductive layer by other physical or chemical methods, other physical methods can be tool cutting, integral stamping, etc., and chemical methods can be chemical liquid corrosion, etc.

[0093] Automatic loading and cutting can be achieved through a loading and cutting device, on which a conductive layer coil and a cutter can be placed, one end of the conductive layer coil is led out, and when the length of the led out continuous conductive layer reaches the requirement, the cutter can work, thereby cutting off a certain length of the continuous conductive layer to form a conductive layer 1. The conductive layer 1 can be laser engraved by a laser platemaking device, which can include multiple laser generators, and the laser generators are used to release lasers to the surface of the conductive layer 1, so as to prepare a graphic structure on the surface of the conductive layer 1 in a laser engraving manner. After laser engraving, some redundant parts will be formed and need to be removed, and this area is also the part to be separated in the embodiment of the present invention.

[0094] One side of the backplane may be covered with an adhesive layer in advance. The adhesive layer may be an adhesive film, and the adhesive film may be an EVA (Ethylene Vinyl Acetate) adhesive film, a POE (Polyolefin Elastomer) adhesive film, or the like. The physical form of the adhesive film may be a solid state or a liquid gel. The backplane provided with an adhesive layer may be stacked with the separated conductive layer 1 to form a first workpiece to be pressed, and then the first workpiece to be pressed may be placed on a pressing device, and the separated conductive layer and the backplane provided with an adhesive layer may be pressed by the pressing device. Among them, in the first workpiece to be pressed, the adhesive layer is located between the conductive layer 1 and the backplane.

[0095] In this embodiment, a pattern structure is first formed on the surface of the separate conductive layer, and then the portion 11 to be separated in the separate conductive layer 1 is removed, and finally, the separated conductive layer and the back plate provided with the adhesive layer are pressed together. In this embodiment, the separated conductive layer and the back plate provided with the adhesive layer can be pressed together using a conventional pressing device, without the need to configure an additional special pressing device.

[0096] In an alternative embodiment of the present invention, referring to Figure 4 The embodiment of the present invention discloses another method for preparing a photovoltaic backplane, and the method for preparing a photovoltaic backplane comprises:

[0097] Step 301, partially pressing the portion of the conductive layer to be retained and the back plate provided with the adhesive layer;

[0098] Step 302, obtaining the partially pressed conductive layer, adhesive layer and back plate;

[0099] Step 303, forming a pattern structure on the surface of the conductive layer;

[0100] Step 304, blowing air to the portion to be separated in the conductive layer;

[0101] Step 305, separating the portion to be separated in the conductive layer.

[0102] The portion 12 of the conductive layer 1 to be retained and the back plate with the adhesive layer can be partially pressed by the local pressing device 8. The back plate with the adhesive layer can be stacked with the conductive layer 1 to form a second workpiece to be pressed, and then the second workpiece to be pressed is placed on the lower pressing plate 82 in the local pressing device 8, and the portion of the conductive layer to be retained and the back plate with the adhesive layer are partially pressed by the local pressing device 8. In the second workpiece to be pressed, the adhesive layer is located between the conductive layer 1 and the back plate.

[0103] Forming a graphic structure on the surface of the conductive layer may include: laser engraving the conductive layer to form a graphic structure on the surface of the conductive layer. In the embodiment of the present invention, the portion 11 to be separated in the conductive layer 1 is blown, and during the entire process of separating the portion 11 to be separated in the conductive layer 1, the portion 12 to be retained in the conductive layer 1 is adhered to the backplane through the adhesive layer. Therefore, during the entire process of removing the portion 11 to be separated, the finger-shaped conductive portion 121 in the portion 12 to be retained will not be blown away, thereby avoiding the risk of clamping the finger-shaped conductive portion 121 when clamping the portion 11 to be separated later.

[0104] After the photovoltaic backplane is prepared, the busbar is first welded to the photovoltaic backplane, and then the photovoltaic backplane and the insulating film are hot pressed together. Then, the battery cells are placed on the photovoltaic backplane provided with the insulating film through typesetting technology, and then the adhesive film and glass are laid. Finally, the glass, adhesive film, battery cells and the photovoltaic backplane provided with the insulating film are laminated to obtain a photovoltaic laminate.

[0105] The main functions of the insulating film are insulation and hot pressing bonding. The surface of the insulating film is formed with a hole pattern by physical or chemical methods. The hole pattern can be any pattern such as circular, triangular, square, etc. The hole pattern is established according to the size and position of the conductive part of the battery cell. The hole pattern is preferably a circular pattern, which can be used for circular solder pads, square solder pads, or solder pads of other patterns in the battery cell. The material of the insulating film can be a single material, or the material of the insulating film can be a composite of multiple materials, such as EVA, POE, PET (Polyethylene Terephthalate) and other materials composited together.

[0106] Second, refer to Figures 5 to 12 An embodiment of the present invention discloses a photovoltaic backplane preparation device, including a blowing device and a separation device, wherein the blowing device is used to blow air to a portion 11 to be separated in a graphic structure in a conductive layer 1, wherein at least the portion 11 to be separated in the conductive layer 1 is not connected to the backplane, and the separation device is used to separate the portion 11 to be separated in the conductive layer 1.

[0107] The direction of the airflow blown by the blowing device may be from bottom to top. When blowing air to the portion 11 to be separated in the conductive layer 1, the conductive layer 1 may be adsorbed on the first carrier 2, the conductive layer 1 is located below the first carrier 2, and the blowing device is located below the first carrier 2. The separation device may include any one of the clamping component 5, the clamping and separation component 7, and the roller brush 4.

[0108] In the embodiment of the present invention, during the process of blowing air to the portion 11 to be separated in the conductive layer 1 and separating the portion 11 to be separated in the conductive layer 1, the portion 11 to be separated is not connected to the backplane, so it is easy to blow away and separate the portion 11 to be separated, and the portion 11 to be separated is not easy to break, which can improve the waste removal efficiency and avoid the situation where the excess area in the graphic structure is easy to break and difficult to peel off due to the strong adhesion between the metal conductive layer and the backplane.

[0109] In an alternative embodiment of the present invention, referring to Figures 5 to 7 The blowing device includes an oscillating blowing component 3, and the oscillating blowing component 3 includes a blowing nozzle 31 which can perform periodic reciprocating motion.

[0110] The oscillating blowing assembly 3 includes a plurality of blowing nozzles 31, and the plurality of blowing nozzles 31 are respectively connected to the first bracket 33 through a plurality of blowing nozzle fixing blocks 32. The blowing nozzles 31 specifically move back and forth periodically along the length direction of the first bracket 33. In this embodiment, blowing through the blowing nozzles 31 that can move back and forth periodically can enhance the blowing effect, make it easier to blow away the part to be separated 11, and avoid the part to be separated 11 from adhering to the part to be retained 12.

[0111] The oscillation blowing assembly 3 also includes a blowing drive 34 and a second bracket 35, wherein the blowing drive 34 is connected to the first bracket 33, and the blowing drive 34 is used to drive the first bracket 33 to reciprocate along its length direction. The blowing drive 34 can be a cylinder. The first bracket 33 is connected to the second bracket 35 through a first guide rail slider mechanism 36, and the first guide rail slider mechanism 36 can include a first slider and a first guide rail. The first guide rail can be set on the second bracket 35, and the first slider is slidably connected to the first guide rail. The first slider is connected to the first bracket 33. The first guide rail slider mechanism 36 plays a guiding role.

[0112] During the blowing process of the oscillating blowing assembly 3, the position of the second bracket 35 can be fixed, and the second bracket 35 can also move along the first direction, the first direction is perpendicular to the length direction of the second bracket 35, and is perpendicular to the height direction of the second bracket 35. The first direction can be parallel to the length direction of the finger-shaped conductive part 121 in the conductive layer 1. The length direction of the finger-shaped conductive part 121 in the conductive layer 1 can refer to Figure 2 The arrow in B shows the direction.

[0113] In an optional embodiment of the present invention, the distance between the blowing device and the conductive layer 1 is greater than or equal to 55 mm along the thickness direction of the conductive layer 1. If the blowing device is too close to the conductive layer 1, there is a risk of blowing wrinkles on the conductive layer 1, which may easily lead to hidden cracks in the battery cell. In this embodiment, when the distance between the blowing device and the conductive layer 1 is within the above range, the risk of blowing wrinkles on the conductive layer 1 caused by the blowing device being too close to the conductive layer 1 can be avoided.

[0114] In an optional embodiment of the present invention, the flow rate of the airflow blown by the blowing device is greater than or equal to 600 L / min and less than or equal to 750 L / min. The flow rate of the airflow blown by the blowing device can be 600 L / min, 620 L / min, 650 L / min, 700 L / min, 750 L / min, etc. When the flow rate of the airflow blown by the blowing device is within the above range, the blowing effect can be guaranteed and the conductive layer 1 can be avoided from being damaged.

[0115] In an alternative embodiment of the present invention, referring to Fig. 9The photovoltaic backplane preparation device also includes a first carrier 2 , which is at least used to absorb the conductive layer 1 , and the conductive layer 1 is located below the first carrier 2 .

[0116] In an alternative embodiment of the present invention, referring to Fig.10 and Fig.11 The separation device includes a clamping and separation component 7, which is located below the first carrier 2; the clamping and separation component 7 includes two clamping rollers 71 that are arranged opposite to each other and rotate in opposite directions. After the blowing device blows away the part 11 to be separated, the end of the part 11 to be separated may adhere to the part 12 to be retained. After blowing, the part 11 to be separated is clamped and separated by the clamping and separation component 7, which can ensure that the part 11 to be separated and the part 12 to be retained are completely separated, thereby improving the overall waste removal rate.

[0117] In an optional embodiment of the present invention, along the thickness direction of the conductive layer 1, the distance between the clamping and separating component 7 and the conductive layer 1 is greater than the length of the finger-shaped conductive portion 121 in the graphic structure. The finger-shaped conductive portion 121 is a bar pattern similar to a finger shape in the graphic structure. The length direction of the finger-shaped conductive portion 121 can refer to Figure 2 The length of the finger-shaped conductive portion 121 can be referred to as Figure 2 When the air blowing device blows air, the finger-shaped conductive portion 121 is at risk of being blown away. In this embodiment, by setting the distance between the clamping and separating component 7 and the conductive layer 1 to be greater than the length of the finger-shaped conductive portion 121 in the graphic structure, even if the finger-shaped conductive portion 121 is blown away, the clamping and separating component 7 will not clamp the finger-shaped conductive portion 121.

[0118] In an alternative embodiment of the present invention, referring to Fig.10 The clamping and separation component 7 also includes an anti-winding mechanism; the anti-winding mechanism includes two auxiliary rollers 72 and two transmission belts 73, and a single transmission belt 73 is wound around the auxiliary roller 72 and the clamping roller 71 located on the same side of the clamping and separation component 7 along the arrangement direction of the two clamping rollers 71.

[0119] Among them, the two auxiliary rollers 72 are respectively located below the two clamping rollers 71. The arrangement direction of the two clamping rollers 71 is that one of the clamping rollers 71 points to the direction of the other clamping roller 71. The clamping and separation component 7 also includes a driving motor 74, which is connected to the clamping roller 71 through a transmission mechanism 75, and the driving motor 74 is used to drive the clamping roller 71 to rotate through the transmission mechanism 75. The transmission mechanism 75 can be a belt transmission mechanism, and the belt transmission mechanism can include a pulley and a belt. When the clamping roller 71 rotates, it will drive the transmission belt 73 wound thereon to move, so that the transmission belt 73 transmits the part 11 to be separated in the direction away from the part 12 to be retained of the conductive layer 1. In this embodiment, the part 11 to be separated can be transmitted in the direction away from the part 12 to be retained of the conductive layer 1 through the transmission belt 73 to avoid the part 11 to be separated from being wrapped around the clamping roller 71.

[0120] It should be noted that Fig.11 In the embodiment, when the clamping and separating assembly 7 includes the clamping roller 71 but does not include the conveying belt 73, a scraper mechanism and a protective cover may be installed on both sides and above the clamping roller 71. The scraper mechanism can scrape off the part 11 to be separated that is wound on the clamping roller 71, thereby preventing the part 11 to be separated from being wound around the clamping roller 71 again after the rotation of the clamping roller 71. The protective cover can prevent the part 11 to be separated from being hung on the roller shaft of the clamping roller 71.

[0121] In an alternative embodiment of the present invention, referring to Figure 5 and Figure 8 The separation device includes a clamping component 5, which is located below the first carrier 2, and is used to clamp the part 11 to be separated in the blown-off conductive layer 1; the separation device also includes a separation driving member, which is used to drive the clamping component 5 to move; and / or the first carrier 2 includes a transmission component, which is used to transmit and adsorb the conductive layer.

[0122] Among them, the clamping assembly 5 can be integrated with the oscillation blowing assembly 3. The clamping assembly 5 can be installed on the second bracket 35. Preferably, the first carrier 2 includes a transmission assembly, and the separation device also includes a separation drive. It should be noted that when the separation drive drives the clamping assembly 5 to move, the transmission assembly may not work. The separation drive is specifically used to drive the clamping assembly 5 to move along the length direction of the second bracket 35. After the blowing device blows away the part 11 to be separated, the end of the part 11 to be separated may adhere to the part 12 to be retained. After blowing, the part 11 to be separated is clamped and separated by the clamping assembly 5, which can ensure the complete separation of the part 11 to be separated and the part 12 to be retained, thereby improving the overall waste removal rate.

[0123] In an alternative embodiment of the present invention, referring to Figure 5 and Figure 8The clamping assembly 5 includes a first clamping strip 51 and a second clamping strip 52; the clamping assembly 5 also includes a clamping driving member 53, and the clamping driving member 53 is used to drive the first clamping strip 51 or the second clamping strip 52 to move along the length direction of the first clamping strip 51; the first clamping strip 51 and the second clamping strip 52 are stacked, and the first clamping strip 51 is provided with a plurality of clamping grooves 511 along the length direction of the first clamping strip 51, and the second clamping strip 52 includes a plurality of clamping hooks 521 arranged at intervals along the length direction of the first clamping strip 51; or, the first clamping strip 51 and the second clamping strip 52 respectively include a plurality of first clamping jaws and a plurality of second clamping jaws arranged at intervals along the length direction of the first clamping strip, and the first clamping jaws and the second clamping jaws are alternately arranged along the length direction of the first clamping strip 51.

[0124] The clamping drive 53 is specifically used to directly drive the second clamp 52 to move, so as to drive the second clamp 52 to move relative to the first clamp 51. The clamping drive 53 may be a cylinder. Preferably, the clamping drive 53 is used to drive the second clamp 52 to move along the length direction of the first clamp 51, and the first clamp 51 is fixed to the second bracket 35. The length direction of the first clamp 51 may be parallel to the arrangement direction of the finger-shaped conductive portion 121 in the conductive layer 1. The length direction of the first clamp 51 may refer to Figure 5 and Figure 8 The direction indicated by the arrow C in the figure, the arrangement direction of the finger-shaped conductive part 121 in the conductive layer 1 can refer to Figure 2 The arrow in A shows the direction.

[0125] When the clamping assembly 5 is integrated with the oscillation blowing assembly 3, the first clamping strip 51 is connected to the second bracket 35 through the second guide rail slider mechanism 54. The second guide rail slider mechanism 54 may include a second slider and a second guide rail, the second guide rail may be arranged on the second bracket 35, the second slider is slidably connected to the second guide rail, and the second slider is connected to the first clamping strip 51.

[0126] When the second clamping bar 52 moves, it moves back and forth along the length direction of the first clamping bar 51. In this embodiment, the first clamping bar 51 and the second clamping bar 52 respectively include a plurality of first clamping jaws and a plurality of second clamping jaws. Initially, there is a certain gap between the first clamping jaw and the second clamping jaw, and the part 11 to be separated will fall between the first clamping jaw and the second clamping jaw after being blown away. Then, the movement of the second clamping bar 52 will drive the second clamping jaw to move toward the first clamping jaw, so as to clamp the part 11 to be separated.

[0127] The shape of the clamping hook 521 can be L-shaped. In this embodiment, a plurality of clamping grooves 511 are formed on the first clamping strip 51, and the second clamping strip 52 includes a plurality of clamping hooks 521. After being blown away, the part 11 to be separated will fall into the clamping groove 511. Then, the second clamping strip 52 moves, and the clamping hook 521 cooperates with the clamping groove 511 to clamp the part 11 to be separated.

[0128] The shape of the clamping groove 511 may be V-shaped so that the part 11 to be separated can better enter the clamping groove 511. It should be noted that, since the width of the clamping groove 511 or the distance between the first clamping jaw and the second clamping jaw is small, even if the finger-shaped conductive part 121 is blown away, it will not fall into the clamping groove 511 or between the first clamping jaw and the second clamping jaw. Therefore, there is no limit on the distance between the clamping component 5 and the conductive layer 1.

[0129] In an alternative embodiment of the present invention, referring to Fig.12 The separation device includes a roller brush 4, which is used to contact the side of the conductive layer 1 facing away from the first carrier 2. The surface of the roller brush 4 has a circle of bristles, and the bristles can scrape off the part 11 to be separated in the conductive layer 1. In the process of the roller brush 4 scraping off the part 11 to be separated in the conductive layer 1, the roller brush 4 rotates and moves to scrape off the part 11 to be separated in the entire conductive layer 1.

[0130] In an alternative embodiment of the present invention, referring to Figures 13 to 15 The photovoltaic backplane preparation equipment also includes a local pressing device 8, which is used to locally press the portion of the conductive layer 1 that needs to be retained and the backplane provided with an adhesive layer; the local pressing device 8 includes an upper pressing plate 81 and a lower pressing plate 82, and the upper pressing plate 81 is provided with a first avoidance groove 811, and / or the lower pressing plate 82 is provided with a second avoidance groove 822.

[0131] Among them, the upper pressing plate 81 includes a protrusion 812, and the protrusion 812 has an upper pressing surface. The protrusion 812 can be a long strip protrusion, and the length direction of the long strip protrusion is parallel to the width direction of the upper pressing plate 81. The lower pressing plate 82 has a lower pressing surface 821. During hot pressing, the upper pressing surface of the protrusion 812 cooperates with the lower pressing surface 821 to locally press the portion 12 to be retained of the conductive layer 1 and the back plate provided with an adhesive layer. The shape and size of the first avoidance groove 811 and the second avoidance groove 822 can match the portion 11 to be separated. In this embodiment, through the cooperation of the first avoidance groove 811 and the second avoidance groove 822, it is possible to avoid the portion 11 to be separated in the conductive layer 1 from being bonded to the back plate during the hot pressing process.

[0132] Reference Fig.16 and Fig.17 The embodiment of the present invention further discloses a second carrier 6 and an adsorption device. The second carrier 6 is used to adsorb the conductive layer 1 . The conductive layer 1 is located on the second carrier 6 .

[0133] In one embodiment, the adsorption device includes an adsorption cover 9, which is located above the second carrier 6. The adsorption cover 9 absorbs the parts to be separated 11 in the conductive layer 1 into the collection device one by one.

[0134] In another embodiment, the suction device includes a nozzle assembly 10, and the nozzle assembly 10 is located above the second carrier 6. The nozzle assembly 10 may include a nozzle fixing bracket and a plurality of nozzles, the nozzle fixing bracket can move up and down and left and right, and the nozzle can be connected to the nozzle fixing bracket through an elastic member, and the nozzle is used to suck the part 11 to be separated in the conductive layer 1. The size of the nozzle can be consistent with the size of the part 11 to be separated.

[0135] It should be noted that the suction nozzle assembly 10 can be used in conjunction with two clamping rollers that are arranged opposite to each other and rotate in opposite directions. When the suction nozzle first descends to suck the part 11 to be separated, it will lift the part 11 to be separated upwards. After reaching a certain height, the two clamping rollers will clamp the sucked part 11 to be separated, and then lift it upwards as a whole. When the part 11 to be separated is lifted to be separated from the part 12 to be retained, the part 11 to be separated is removed into the collection device.

[0136] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0137] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A method for preparing a photovoltaic backsheet, characterized in that: include: At least a conductive layer having a pattern structure on its surface is obtained, wherein the pattern structure has a portion to be separated, and at least the portion to be separated in the conductive layer is not connected to the backplane; Blowing air to the portion to be separated in the conductive layer; The portion to be separated in the conductive layer is separated.

2. The method for preparing a photovoltaic backsheet according to claim 1, characterized in that: Blowing air to the portion to be separated in the conductive layer comprises: Blowing the portion to be separated in the conductive layer by means of an oscillating blowing component; Wherein, the oscillating blowing component comprises a blowing nozzle which can perform periodic reciprocating motion.

3. The method for preparing a photovoltaic backsheet according to claim 1, characterized in that: The step of separating the portion to be separated from the conductive layer comprises: clamping the portion to be separated from the blown-off conductive layer; The portion to be separated and the portion to be retained of the conductive layer are moved relative to each other, so as to separate the portion to be separated in the conductive layer.

4. The method for preparing a photovoltaic back sheet according to claim 3, characterized in that: The step of causing the portion to be separated and the portion to be retained of the conductive layer to move relative to each other comprises: The portion to be separated is transported in a direction away from the portion to be retained of the conductive layer.

5. The method for preparing a photovoltaic backsheet according to any one of claims 1 to 4, characterized in that: The step of obtaining at least a conductive layer having a patterned structure on the surface comprises: Only a conductive layer with a patterned structure on the surface is obtained; After separating the part to be separated in the conductive layer, the method further comprises: The separated conductive layer and the back plate provided with the adhesive layer are pressed together to obtain a photovoltaic back plate.

6. The method for preparing a photovoltaic backsheet according to any one of claims 1 to 4, characterized in that: Before obtaining at least a conductive layer having a pattern structure on the surface, the method comprises: Partially pressing the portion of the conductive layer to be retained and the back plate provided with the adhesive layer; The step of obtaining at least a conductive layer having a patterned structure on the surface comprises: Obtaining a partially pressed conductive layer, an adhesive layer and a backplane; A pattern structure is formed on the surface of the conductive layer.

7. A photovoltaic backplane preparation device, characterized in that: include: A blowing device, the blowing device is used to blow air to the part to be separated in the graphic structure in the conductive layer, wherein at least the part to be separated in the conductive layer is not connected to the backplane; A separation device is used to separate the part to be separated from the conductive layer.

8. The photovoltaic backplane preparation equipment according to claim 7, characterized in that: The blowing device comprises an oscillating blowing assembly, and the oscillating blowing assembly comprises a blowing nozzle which can perform periodic reciprocating motion.

9. The photovoltaic backsheet preparation device according to claim 7 or 8, characterized in that: Along the thickness direction of the conductive layer, the distance between the blowing device and the conductive layer is greater than or equal to 55 mm.

10. The photovoltaic backsheet preparation device according to claim 7 or 8, characterized in that: The flow rate of the air flow blown out by the blowing device is greater than or equal to 600 L / min and less than or equal to 750 L / min.

11. The photovoltaic backsheet preparation device according to claim 7, characterized in that: The photovoltaic backplane preparation equipment also includes a first carrier, which is at least used to absorb the conductive layer, and the conductive layer is located under the first carrier.

12. The photovoltaic backsheet preparation device according to claim 11, characterized in that: The separation device comprises a clamping and separation assembly, and the clamping and separation assembly is located below the first carrier; The clamping and separating assembly comprises two clamping rollers which are arranged opposite to each other and rotate towards each other.

13. The photovoltaic backsheet preparation device according to claim 12, characterized in that: Along the thickness direction of the conductive layer, the distance between the clamping separation component and the conductive layer is greater than the length of the finger-shaped conductive part in the graphic structure.

14. The photovoltaic backsheet manufacturing equipment according to claim 12, characterized in that: The clamping and separation assembly also includes an anti-winding mechanism; The anti-winding mechanism comprises two auxiliary rollers and two transmission belts, and a single transmission belt is wound around the auxiliary roller and the clamping roller located on the same side of the clamping and separation component along the arrangement direction of the two clamping rollers.

15. The photovoltaic backsheet preparation device according to claim 11, characterized in that: The separation device comprises a clamping assembly, the clamping assembly is located below the first carrier, and the clamping assembly is used to clamp the portion to be separated in the blown-off conductive layer; The separation device further comprises a separation driving member, and the separation driving member is used to drive the clamping assembly to move; And / or, the first carrier includes a transmission component, and the transmission component is used for transmitting and adsorbing the conductive layer.

16. The photovoltaic backsheet preparation device according to claim 15, characterized in that: The clamping assembly includes a first clamping strip and a second clamping strip; The clamping assembly further includes a clamping driving member, and the clamping driving member is used to drive the first clamping bar or the second clamping bar to move along the length direction of the first clamping bar; The first clamping strip and the second clamping strip are stacked, the first clamping strip is provided with a plurality of clamping grooves along the length direction of the first clamping strip, and the second clamping strip includes a plurality of clamping hooks arranged at intervals along the length direction of the first clamping strip; Alternatively, the first clamping bar and the second clamping bar respectively include a plurality of first clamping jaws and a plurality of second clamping jaws arranged at intervals along the length direction of the first clamping bar, and the first clamping jaws and the second clamping jaws are arranged alternately along the length direction of the first clamping bar.

17. The photovoltaic backsheet preparation device according to claim 11, characterized in that: The separation device comprises a rolling brush, and the rolling brush is used to contact a side of the conductive layer facing away from the first carrier.

18. The photovoltaic backsheet preparation device according to claim 7, characterized in that: The photovoltaic backplane preparation equipment further comprises a local pressing device, which is used to locally press the portion of the conductive layer to be retained and the backplane provided with the adhesive layer; The local pressing device comprises an upper pressing plate and a lower pressing plate, the upper pressing plate is provided with a first avoidance groove, and / or the lower pressing plate is provided with a second avoidance groove.

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