Lamination tool and photovoltaic module lamination method

Abstract

The invention provides a laminating tool and a photovoltaic module laminating method.The laminating tool comprises a laminating frame and a balancing weight, the laminating frame comprises oppositely-arranged first frames parallel to the first direction and further comprises oppositely-arranged second frames parallel to the second direction, and the balancing weight is arranged between the first frames and the second frames. The first frames and the second frames are sequentially connected end to end, and the first frames are detachably connected with balancing weights. The laminating method comprises the following steps of: laminating the photovoltaic modules, namely sequentially laying a first adhesive film, a battery string, a second adhesive film and back glass on front glass, blocking holes of the back glass to seal outgoing lines, sealing edges of the laminated photovoltaic modules, and laminating the edge-sealed photovoltaic modules by adopting a laminating tool, wherein the laminating tool is the laminating tool. The laminating tool is simple in structure, glass of the photovoltaic module is prevented from warping in the laminating process, edge sealing glue is effectively prevented from overflowing, and the laminating quality of the photovoltaic module is improved.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic technology, and in particular to a laminating tool and a photovoltaic component laminating method. Background Art

[0002] Photovoltaic modules generate electrical energy based on the photoelectric effect of semiconductors. When sunlight shines on photovoltaic modules, the energy of photons can excite electrons in semiconductor materials, causing them to jump from the valence band to the conduction band, thereby generating electron-hole pairs. Under the action of the electric field of the PN junction, electrons and holes are separated, thus forming a current in the external circuit. This process converts sunlight energy into electrical energy.

[0003] With the development of heterojunction cells, silver-coated copper, TOPCon cells (tunneling oxide passivated contact solar cells) and 0BB (Zero Bus Bar) busbar-free technology, photovoltaic modules have derived different packaging materials and battery slurries. New packaging and welding materials have put forward new requirements for tolerance to water vapor, oxygen, etc. For example, heterojunction photovoltaic modules are extremely sensitive to water penetration, so the packaging process or packaging materials used in photovoltaic modules are very strict. At present, heterojunction photovoltaic modules are generally encapsulated with a circle of butyl glue around them for waterproofing, and then the heterojunction photovoltaic modules are laminated. However, due to the thermal stress of the glass itself in the photovoltaic module, the photovoltaic module will be deformed after entering the laminator for high-temperature heating, and the glass at the head and tail of the short side of the photovoltaic module will bend upward, which is easy to cause problems such as butyl glue penetration, debonding and bubbles at the head and tail short sides, affecting the performance of the photovoltaic module. In addition, butyl glue is easy to overflow from the glass surface during high-temperature extrusion, causing the laminator and the glass surface of the photovoltaic module to be contaminated, affecting the appearance of the photovoltaic module, and wasting manpower to clean the overflow glue.

[0004] One solution is to set a first magnetic part and a second magnetic part in the laminating frame and the laminating machine heating platform, so that the four corners of the laminated glass can be prevented from warping and bending under the force of the first magnetic part and the second magnetic part adsorbing each other. However, this solution requires adding magnetic parts to the laminating machine heating plate and laminating frame, and the equipment modification cost is high. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a laminating tool and a photovoltaic module laminating method to ensure that the glass of the photovoltaic module does not warp during the lamination process, effectively prevent the edge sealing glue from overflowing, and improve the lamination quality of the photovoltaic module.

[0006] To solve the above technical problems, in the first aspect, the present invention provides a laminating tooling, comprising: a laminating frame, the laminating frame comprising first frames arranged opposite to each other, the first frames being parallel to a first direction; and also comprising second frames arranged opposite to each other, the second frames being parallel to a second direction, the first frames and the second frames being connected end to end in sequence; and a counterweight block, the first frames being detachably connected to the counterweight block.

[0007] Optionally, the length of the first border is less than or equal to the length of the second border.

[0008] Optionally, a mounting groove is provided on a side of the first frame close to the counterweight block, and a mounting protrusion is provided on a side of the counterweight block close to the first frame. When the counterweight block is configured on the laminate frame, the mounting protrusion is placed in the mounting groove.

[0009] Optionally, the mounting groove includes an outer groove and an inner groove, and the height of the inner groove is greater than the height of the outer groove, the mounting protrusion includes a first protrusion on the outer side and a second protrusion on the inner side, and the thickness of the first protrusion is greater than the thickness of the second protrusion, and when the counterweight block is configured in the laminate frame, the first protrusion is placed in the inner groove, and the second protrusion is placed in the outer groove.

[0010] Optionally, there is also a positioning member, which includes a positioning pin, and the positioning pin is arranged on the counterweight block; when the counterweight block is configured in the laminate frame and needs to be positioned, the positioning pin at least partially extends out of the surface of the counterweight block and is placed in the corresponding positioning hole on the first frame.

[0011] Optionally, at least two positioning members are provided on the counterweight block.

[0012] Optionally, the positioning member also includes an elastic portion, a fixed end of the elastic portion is connected to the counterweight block, and a movable end of the elastic portion is connected to the positioning pin; when the elastic portion is in an extended state, the positioning pin at least partially extends out of the surface of the counterweight block, and when the elastic portion is in a compressed state, the positioning pin is located below the surface of the counterweight block.

[0013] Optionally, the fixed end of the elastic part is connected to the counterweight block, including: the positioning member also includes a fixed part, the fixed part is installed in the counterweight block, and the elastic part is located in the fixed part, and the fixed end of the elastic part is connected to the fixed part.

[0014] Optionally, at least one of the first frames has an anti-overflow rubber component.

[0015] Optionally, a middle frame is further included, two ends of the middle frame are respectively connected to the second frame at two ends, and an anti-overflow rubber part is arranged on the middle frame.

[0016] In a second aspect, the present invention provides a photovoltaic module lamination method, comprising: stacking photovoltaic modules, including: laying a first adhesive film, a battery string, a second adhesive film and a back glass in sequence on the front glass; plugging the holes of the back glass to seal the lead-out wires; edge-sealing the stacked photovoltaic modules; laminating the edge-sealed photovoltaic modules using a laminating tool, wherein the laminating tool adopts the laminating tool as described in the first aspect.

[0017] Optionally, in the step of edge-sealing the stacked photovoltaic modules, the long sides of the photovoltaic modules are edge-sealed using a non-porous tape, and the short sides of the photovoltaic modules are edge-sealed using a porous tape.

[0018] Optionally, in the lamination step of the photovoltaic module after edge sealing using a lamination tool, the lamination temperature is 135°C to 160°C, and / or the lamination pressure is -20KPA to -80KPA, and / or the vacuuming time is 4min to 8min, and / or the lamination time is 10min to 25min.

[0019] Compared with the prior art, the present invention has the following advantages: the counterweight block is detachably connected only to the first frame of the lamination frame, and the structure is simple. Through the counterweight block, during the lamination process of the photovoltaic modules, the glass of the photovoltaic modules will not warp, and the modules will be heated evenly, and it is not easy to produce glue penetration, debonding and bubbles, thereby improving the lamination quality of the photovoltaic modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the present application. They are included and constitute a part of the present application. The accompanying drawings illustrate embodiments of the present application and together with the present specification serve to explain the principles of the present application. In the accompanying drawings:

[0021] Figure 1 It is a structural schematic diagram of a laminating tooling according to an embodiment of the present invention;

[0022] Figure 2 It is a structural detail diagram of the connection between the laminate frame and the counterweight block in one embodiment of the present invention;

[0023] Figure 3 yes Figure 1 An enlarged side view of the structure at the middle dashed line A;

[0024] Figure 4 It is a schematic diagram of the process of a photovoltaic module lamination method according to an embodiment of the present invention.

[0025] In the figure:

[0026] 100-Laminated frame;

[0027] 110-first frame, 120-second frame, 130-middle frame, 140-anti-overflow rubber part;

[0028] 111-installation slot, 112-external slot, 113-inner slot;

[0029] 200-Counterweight;

[0030] 210-installation protrusion, 211-first protrusion, 212-second protrusion;

[0031] 220 - positioning pin, 230 - elastic part, 240 - fixing part. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. Obviously, the drawings described below are only some examples or embodiments of the present application. For ordinary technicians in this field, the present application can also be applied to other similar scenarios based on these drawings without creative work. Unless it is obvious from the language environment or otherwise explained, the same reference numerals in the figures represent the same structure or operation.

[0033] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0034] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.

[0035] Flowcharts are used in the present application to illustrate the operations performed according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, various steps may be processed in reverse order or simultaneously. At the same time, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0036] refer to Figure 1 to Figure 3 As shown, the lamination tooling of this embodiment mainly includes a lamination frame 100 and a counterweight block 200. The lamination frame 100 includes a first frame 110 arranged opposite to each other. The first frame 110 is parallel to the first direction. Figure 1 In the horizontal direction, the second frame 120 is also arranged oppositely, and the second frame 120 is parallel to the second direction. Figure 1 In the vertical direction, each first frame 110 and each second frame 120 are connected end to end in sequence to form a laminated frame 100, wherein the first frame 110 is detachably connected to the counterweight block 200.

[0037] In one example, the length of the first frame 110 is less than or equal to the length of the second frame 120, that is, the first frame 110 is a short frame, and the second frame 120 is a long frame. In one implementation, the laminate frame 100 can be made of aluminum alloy, which has the advantages of light weight, high temperature resistance, not easy to deform, and long life.

[0038] In this embodiment, different weights of counterweights 200 can be selected according to the size of the photovoltaic module. The counterweights 200 can be made of different metals, such as stainless steel, copper, high-strength alloy, etc., and can also be made of different sizes, such as 200mm, 400mm, 600mm, etc.

[0039] refer to Figure 1 As shown in the figure, the laminating frame 100 has two first frames 110 (S1, S2) and two second frames 120 (L1, L2), and each first frame 110 and each second frame 120 are connected end to end in sequence, that is, S1, L1, S2, L2 are connected end to end in sequence to form the overall framework of the laminating frame 100. The first frame 110 and the second frame 120 can be connected by a corner connector, which plays an important role in the photovoltaic module, and the connection between the first frame 110 and the second frame 120 is more stable. Exemplarily, the first frame 110 of the laminating frame 100 forms a right angle with the second frame 120, and the structural laminating frame 100 is adapted to most photovoltaic module lamination processes. Of course, it is not excluded that the angle formed by the first frame 110 and the second frame 120 is a non-right angle, so as to adapt to the lamination process of photovoltaic modules of different configurations.

[0040] In this embodiment, the first frame 110 is detachably connected to the counterweight 200. When the first frame 110 is not connected to the counterweight 200, the laminating tooling can be regarded as a laminating tooling of the basic configuration. When the first frame 110 is connected to the counterweight 200, under the pressure of the counterweight 200, the glass does not warp during the lamination process of the photovoltaic module, and the photovoltaic module film is evenly heated to avoid the occurrence of glue penetration and bubbles. At the same time, since the counterweight 200 is detachably connected to the first frame 110, counterweights 200 of different weights can be selected according to the photovoltaic module version or other specific requirements. It can be known that since the photovoltaic module will be deformed after entering the laminator at high temperature, the glass warping at the head and tail of the short frame is generally more serious, so the counterweight 200 is set on the short frame in this embodiment. In fact, the counterweight 200 in this embodiment can also be set on the long frame, which will not be repeated here.

[0041] In one example, a mounting groove 111 is provided on one side of the first frame 110 close to the counterweight 200 , and a mounting protrusion 210 is provided on one side of the counterweight 200 close to the first frame 110 . When the counterweight 200 is configured on the laminate frame 100 , the mounting protrusion 210 is placed in the mounting groove 111 .

[0042] In this embodiment, the matching structure of the mounting protrusion 210 and the mounting groove 111 has higher installation efficiency and stability. When installing the counterweight 200, the mounting protrusion 210 can be easily inserted or slid into the mounting groove 111, and the installation of the counterweight 200 is achieved by simple sliding. Due to the simplicity of the matching structure of the mounting protrusion 210 and the mounting groove 111, the installer can more easily perform the installation operation of the counterweight 200, reducing the installation difficulty and subsequent maintenance costs.

[0043] In one example, the mounting groove 111 includes an outer groove 112 and an inner groove 113, and the height of the inner groove 113 is greater than the height of the outer groove 112, the mounting protrusion 210 includes an outer first protrusion 211 and an inner second protrusion 212, and the thickness of the first protrusion 211 is greater than the thickness of the second protrusion 212, and when the counterweight block 200 is configured in the laminate frame 100, the first protrusion 211 is placed in the inner groove 113, and the second protrusion 212 is placed in the outer groove 112.

[0044] refer to Figure 2As shown, the mounting groove 111 shown in the figure consists of two parts, wherein the outer groove 112 is located on the left, and the inner groove 113 is located on the right, the height of the outer groove 112 is represented by H1, the height of the inner groove 113 is represented by H2, and H1<H2. The mounting protrusion 210 shown in the figure consists of two parts, wherein the first protrusion 211 is located on the right, and the second protrusion 212 is located on the left, the thickness of the first protrusion 211 is represented by T2, the thickness of the second protrusion 212 is represented by T1, and T1<T2. Based on this structure, when the mounting protrusion 210 slides into the mounting groove 111, the first protrusion 211 is placed in the inner groove position, and the second protrusion 212 is placed in the outer groove 112 position. Since H1<H2, T1<T2, the mounting protrusion 210 and the mounting groove 111 form a tight snap-fitting structure. In the non-sliding direction of the mounting groove 111, the mounting protrusion 210 is not easy to fall out of the mounting groove 111, thereby making the counterweight 200 more stably installed on the side of the first frame 110.

[0045] In one example, the laminating tool further has a positioning member, which includes a positioning pin 220, and the positioning pin 220 is arranged on the counterweight 200. When the laminating frame 100 is equipped with the counterweight 200 and the counterweight 200 needs to be positioned, the positioning pin 220 at least partially extends out of the surface of the counterweight 200 and is placed in a corresponding positioning hole (not shown in the figure) on the first frame 110.

[0046] refer to Figure 3 As shown, Figure 3 The middle counterweight 200 has been installed on the first frame 110. Since the counterweight 200 is connected to the first frame 110 by sliding the mounting protrusion 210 to the mounting groove 111, if there is no other fixing method, during the lamination of the photovoltaic module, when the counterweight 200 has a force in the sliding direction relative to the first frame 110, the counterweight 200 can move along the sliding direction of the mounting groove 111, which will cause uneven force on the glass of the photovoltaic module during the lamination process, and the anti-warping effect of the counterweight 200 on the glass in the photovoltaic module cannot be fully exerted. Based on this, in this embodiment, a positioning member is provided on the counterweight 200, and the positioning member has a positioning pin 220 that can extend out of the surface of the counterweight 200. When the positioning pin 220 at least partially extends out of the surface of the counterweight 200 and is placed in the corresponding positioning hole on the first frame 110, the positioning pin 220 temporarily blocks the counterweight 200 on the first frame 110, preventing the counterweight 200 from sliding relative to the first frame 110. It can be understood that the surface of the counterweight 200 here is the surface where the counterweight 200 contacts the first frame 110. When the counterweight 200 needs to be removed from the first frame 110, it is only necessary to retract the positioning pin 220 into the counterweight 200.

[0047] In one example, at least two positioning members are provided on the counterweight 200. In one implementation, the left and right ends of the counterweight 200 each have a positioning member, and the left and right ends of the first frame 110 each have a positioning hole. On the one hand, the positioning members at both ends of the counterweight 200 can provide a positioning function for the counterweight 200, and on the other hand, the positioning members are also easier to be provided on the counterweight 200, and the positioning members are more convenient to operate.

[0048] In one example, the positioning member further includes an elastic portion 230, and the elastic portion 230 includes a positioning end and a movable end. The fixed end of the elastic portion 230 is connected to the counterweight 200, and the movable end of the elastic portion 230 is connected to the positioning pin 220. When the elastic portion 230 is in an extended state, the positioning pin 220 at least partially extends out of the surface of the counterweight 200, and when the elastic portion 230 is in a compressed state, the positioning pin 220 is located below the surface of the counterweight 200.

[0049] In the present embodiment, the elastic part 230 can be a spring, rubber or other components or their combination, which are not listed here. The elastic part 230 is in an extended state, which is generally the elastic part 230 in a natural state, and the elastic part 230 is in a compressed state, which is generally caused by an external force to make the elastic part 230 in a compressed state. Therefore, in the absence of external force intervention, the elastic part 230 extends outward, and then the positioning pin 220 connected to its movable end also extends outward synchronously until it extends out of the surface of the counterweight 200. If the counterweight 200 is connected to the first frame 110 at this time, the positioning pin 220 can be extended into the positioning hole of the first frame 110. If the counterweight 200 needs to be installed to the first frame 110, it is necessary to compress the elastic part 230 with the help of an external force, so that the positioning pin 220 connected to the movable end of the elastic part 230 is retracted into the counterweight 200, without affecting the sliding installation function of the counterweight 200 relative to the first frame 110.

[0050] In one example, the fixed end of the elastic part 230 is connected to the counterweight 200 in the following structural form: the positioning member also includes a fixed part 240, the fixed part 240 is installed in the counterweight 200, and the elastic part 230 is located in the fixed part 240, and the fixed end of the elastic part 230 is connected to the fixed part 240.

[0051] In this embodiment, since the elastic part 230 is arranged inside the fixing part 240, when the fixing part 240 is installed on the counterweight 200, the elastic part 230 is also installed on the counterweight 200, and when the fixing part 240 is removed from the counterweight 200, the elastic part 230 is also removed together. It can be seen that, with the structure of this embodiment, the elastic part 230 does not need to be directly fixed on the counterweight 200, but is indirectly fixed on the counterweight 200 through the fixing part 240, thereby facilitating the installation and removal process of the elastic part 230 on the counterweight 200.

[0052] Exemplarily, when installing the fixed part 240 and the elastic part 230, the fixed part 240 is passed through the waist-shaped hole in the counterweight 200. After the positioning pin 220 protrudes or extends out of the surface of the counterweight 200, the elastic part 230 is installed at a predetermined position in the fixed part 240, and then the fixed part 240 is embedded in the counterweight 200. When embedded, the elastic part 230 is squeezed to shrink the elastic part 230. Of course, the fixed end of the elastic part 230 is fixed on the fixed part 240, and then the fixed part 240 is fixed to the counterweight 200 by screws or the like.

[0053] If the counterweight 200 needs to be installed on the first frame 110, the positioning pin 220 is first pressed, the elastic part 230 is retracted or the elastic part 230 is retracted by other external force, so that the originally protruding positioning pin 220 is also retracted synchronously to be flush with the surface of the counterweight 200 or located below the surface of the counterweight 200, and then the mounting protrusion 210 of the counterweight 200 is slid into the mounting groove 111 on the first frame 110. When the counterweight 200 is installed to the predetermined position, the elastic part 230 is released, and the positioning pin 220 is extended into the positioning hole of the first frame 110 under the action of the elastic part 230, thereby completing the connection and fixation of the first frame 110 and the counterweight 200. When it is necessary to remove or replace the counterweight 200 of different weight, it is only necessary to retract the elastic part 230, that is, to retract the positioning pin 220, and the counterweight 200 can be separated from the first frame 110 by sliding the mounting protrusion 210 in the mounting groove 111.

[0054] In one example, at least one first frame 110 of the laminate frame 100 of this embodiment has an anti-overflow adhesive member 140. Figure 1 As shown, an anti-overflow rubber part 140 can be provided on both S1 and S2. Exemplarily, the anti-overflow rubber part 140 can be made of polytetrafluoroethylene cloth, and the short frames S1 and S2 of the lamination frame 100 are respectively provided with an anti-overflow rubber polytetrafluoroethylene cloth, which can be fixed on the short frames S1 and S2 by screws, so that the anti-overflow rubber polytetrafluoroethylene cloth can be replaced in time when it is damaged or dirty.

[0055] In one example, reference Figure 1 As shown, the laminating frame 100 also includes a middle frame 130, the two ends of which are respectively connected to the second frames 120 at the two ends, and an anti-overflow glue part 140 is provided on the middle frame 130. Similarly, the anti-overflow glue part 140 can also be made of polytetrafluoroethylene cloth. Exemplarily, adding anti-overflow glue polytetrafluoroethylene cloth in the middle of the laminating frame 100 can solve the problem that butyl glue is easily squeezed out during the high-temperature lamination process, causing the laminating machine and photovoltaic modules to be dirty.

[0056] The laminating tooling of this embodiment is only detachably connected to the counterweight block 200 on the first frame 110 of the laminating frame 100, and has a simple structure. Through the counterweight block 200, during the laminating process of the photovoltaic module, the glass of the photovoltaic module does not warp, and the photovoltaic module is heated evenly, effectively avoiding problems such as glue penetration, glue opening, and bubbles in the photovoltaic module. If an anti-overflow glue part 140 is set in the middle of the laminating frame 100, glue overflow during lamination can be effectively prevented.

[0057] Another embodiment of the present invention provides a photovoltaic module lamination method, referring to Figure 4 As shown, method 400 includes: S410, stacking photovoltaic modules, including: laying a first adhesive film, a battery string, a second adhesive film and a back glass in sequence on the front glass; S420, plugging the holes of the back glass to seal the lead-out wires; edge-sealing the stacked photovoltaic modules; S430, laminating the edge-sealed photovoltaic modules using a laminating tool, wherein the laminating tool can be the laminating tool mentioned in the above-mentioned embodiment.

[0058] In this embodiment, method 400 uses a laminating tool with a counterweight block, thereby solving the problem of glass warping at the head and tail of the short frame during the lamination process of the photovoltaic module, which causes glue penetration and bubbles at the head and tail of the short frame.

[0059] In one example, in the step of edge sealing the laminated photovoltaic modules, the long sides of the photovoltaic modules are edge sealed with non-porous tape, and the short sides of the photovoltaic modules are edge sealed with porous tape. The improved edge sealing method reduces glue overflow, reduces the dirt on the laminator and photovoltaic modules, and also ensures the effective water-blocking distance after the film is laminated, thereby improving the water-blocking performance of the photovoltaic modules.

[0060] In one example, in the lamination step of the photovoltaic module after edge sealing using a lamination tool, the lamination temperature is 135°C to 160°C, and / or the lamination pressure is -20KPA to -80KPA, and / or the vacuuming time is 4min to 8min, and / or the lamination time is 10min to 25min.

[0061] Exemplarily, the preparation process of photovoltaic modules implemented by the method 400 of this embodiment may specifically include the following steps: 1. The front glass flows into the assembly line, and at the same time, the first film is accurately cut by a precision cutting machine and then laid on the front glass; 2. The automatic typesetting machine lays the welded battery string on the first film, and the battery string is welded in series / parallel by a stacking welding machine. After the welding is completed, EVA strips are placed at the fixed positions of the head, middle and tail of the photovoltaic module and heated and fixed. The heating method includes soldering with a soldering iron, fixing with a hot air gun or infrared hot welding, and then the second film that is accurately cut is laid on the battery string by a precision film cutting machine; 3. Butyl glue is filled around the front glass of the photovoltaic module, and then the back glass is covered, and the holes in the back glass are plugged with butyl glue to ensure the waterproof performance of the photovoltaic module; 4. The stacked photovoltaic modules are edge-sealed around and then the lamination process is carried out; 5. After the semi-finished laminated parts complete the lamination process, the post-lamination inspection, framing, wiring box installation, curing, cleaning and testing and other post-processes are carried out.

[0062] Among them, for step 4, considering that butyl rubber plays a key role in the water-blocking performance of photovoltaic modules, if the overflow of butyl rubber is reduced during the lamination process of photovoltaic modules, it can not only avoid the problem of butyl rubber contaminating the laminator and photovoltaic modules, but also improve the performance reliability of photovoltaic modules. In the edge sealing step, the stacked photovoltaic modules are edge sealed on all sides. The two long sides of the photovoltaic modules use non-porous tape, and the adhesive force of the tape is 4 to 8N / 25mm. This operation can not only reduce the overflow of butyl rubber at the two long sides of the photovoltaic modules, but also the edge sealing tape with specific viscosity can not be stretched at a certain temperature during the lamination process. The two short sides of the photovoltaic module use porous tape, the tape aperture is 0.2 to 2mm, the hole spacing is 10 to 100mm, and the adhesive force of the tape is 4 to 8N / 25mm. The edge sealing tape with this aperture and hole spacing can minimize the overflow of butyl rubber, and at the same time, the gas generated during the lamination process can be released to avoid excessive bubbles in the photovoltaic module. This example method can be performed using a three-chamber laminator, with a laminator temperature of 135°C to 160°C, a laminating pressure of -20KPA to -80KPA, a vacuuming time of 4min to 8min, and a laminating time of 10min to 25min. After the photovoltaic module is laminated, it immediately enters the cooling chamber for rapid cooling.

[0063] The photovoltaic module lamination method of this embodiment uses the counterweight block of the laminating tooling to prevent the glass of the photovoltaic module from warping during the photovoltaic module lamination process, and the module is evenly heated, and it is not easy to produce glue penetration, debonding and bubbles, etc., thereby improving the lamination quality of the photovoltaic module. The first frame and / or the middle frame of the lamination frame are added with anti-overflow glue parts to solve the problem that the glue is easily squeezed out during the high-temperature lamination process, causing the laminator and photovoltaic module to be dirty. In addition, the improved edge sealing method reduces glue overflow, reduces the dirt of the laminator and photovoltaic modules, and also ensures the effective water-blocking distance after the film is laminarized, thereby improving the water-blocking performance of the photovoltaic module.

[0064] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0065] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers used in the description of the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters used to confirm the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0066] Although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should recognize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the present application. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A laminate tooling, characterized in that: include: A laminate frame, the laminate frame comprising first frames arranged opposite to each other, the first frames being parallel to a first direction; and second frames arranged opposite to each other, the second frames being parallel to a second direction, the first frames and the second frames being connected end to end in sequence; A counterweight block, wherein the first frame is detachably connected to the counterweight block.

2. The laminating tooling according to claim 1, characterized in that: The length of the first frame is less than or equal to the length of the second frame.

3. The laminating tooling according to claim 1, characterized in that: A mounting groove is provided on one side of the first frame close to the counterweight block, and a mounting protrusion is provided on one side of the counterweight block close to the first frame. When the counterweight block is configured on the laminate frame, the mounting protrusion is placed in the mounting groove.

4. The laminating tooling according to claim 3, characterized in that: The mounting groove includes an outer groove and an inner groove, and the height of the inner groove is greater than the height of the outer groove. The mounting protrusion includes a first protrusion on the outer side and a second protrusion on the inner side, and the thickness of the first protrusion is greater than the thickness of the second protrusion. When the counterweight block is configured on the laminate frame, the first protrusion is placed in the inner groove and the second protrusion is placed in the outer groove.

5. The laminating tooling according to claim 1, characterized in that: It also has a positioning piece, which includes a positioning pin, and the positioning pin is arranged on the counterweight block; when the counterweight block is configured in the laminate frame and needs to be positioned, the positioning pin at least partially extends out of the surface of the counterweight block and is placed in the corresponding positioning hole on the first frame.

6. The laminating tooling according to claim 5, characterized in that: At least two positioning members are arranged on the counterweight block.

7. The laminating tooling according to claim 5, characterized in that: The positioning member also includes an elastic portion, a fixed end of the elastic portion is connected to the counterweight block, and a movable end of the elastic portion is connected to the positioning pin; when the elastic portion is in an extended state, the positioning pin at least partially extends out of the surface of the counterweight block, and when the elastic portion is in a compressed state, the positioning pin is located below the surface of the counterweight block.

8. The laminating tooling according to claim 7, characterized in that: The fixed end of the elastic part is connected to the counterweight block and comprises: The positioning member further comprises a fixing portion, the fixing portion is installed in the counterweight block, the elastic portion is located inside the fixing portion, and the fixing end of the elastic portion is connected to the fixing portion.

9. The laminating tooling according to claim 1, characterized in that: At least one of the first frames has an anti-overflow rubber component.

10. The laminating tooling according to claim 1 or 9, characterized in that: It also includes a middle frame, two ends of which are respectively connected to the second frame frames at two ends, and an anti-overflow rubber part is arranged on the middle frame.

11. A photovoltaic module lamination method, characterized in that: include: Laminating photovoltaic modules, including: laying a first adhesive film, a battery string, a second adhesive film and a back glass in sequence on the front glass; The holes of the back glass are blocked to seal the lead wires; the stacked photovoltaic modules are edge-sealed; The photovoltaic modules after edge sealing are laminated by using a laminating tool, wherein the laminating tool is the laminating tool as claimed in any one of claims 1 to 10.

12. The photovoltaic module lamination method according to claim 11, characterized in that: In the step of edge-sealing the stacked photovoltaic modules, the long sides of the photovoltaic modules are edge-sealed with a non-porous tape, and the short sides of the photovoltaic modules are edge-sealed with a porous tape.

13. The photovoltaic module lamination method according to claim 11, characterized in that: In the lamination step of the edge-sealed photovoltaic module using a lamination tool, the lamination temperature is 135° C. to 160° C., and / or the lamination pressure is -20KPA to -80KPA, and / or the vacuuming time is 4min to 8min, and / or the lamination time is 10min to 25min.

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