Photovoltaic module strip film laying apparatus and laying method

Abstract

The application relates to a photovoltaic module strip film laying device and a laying method, which comprises the following steps: a feeding stage: a material head of a material roll is grabbed by a material changing clamp jaw, a film belt is pulled out, and then is pulled to a tension releasing station, so that the film belt is free from additional traction; during the process of grabbing the material head by the material changing clamp jaw, the time interval of switching each material roll is equal; a pulling stage: the film belt is pulled to the tension releasing station, the film belt with tension naturally falls by a desired length after first power feeding; then the naturally fallen film belt section is output again by a motor; an attaching stage: the tension-free film belt output after natural falling is punched and cut, so that an attaching section with a desired length is obtained, the attaching section is clamped by a material taking and placing clamp jaw, and is transported to a film attaching position on a photovoltaic panel to carry out film pressing. The application has the advantages of shortening material changing time, reducing deviation caused by deformation of an elastic film belt, and providing a more applicable whole machine device for small strip films.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module film application technology, and in particular to a photovoltaic module strip film laying equipment and laying method. Background Technology

[0002] In the current field of solar photovoltaic module production and processing, with the continuous increase in production intensity and usage demand, people have also put forward higher requirements for the structure and performance of solar photovoltaic modules.

[0003] In the existing solar photovoltaic module manufacturing process, in order to avoid short circuits after the busbars overlap, it is necessary to isolate them from EVA by using backsheet strips. The outside of the busbar section is bonded to the backsheet strip by EVA (ethylene-vinyl acetate copolymer) strips.

[0004] In the industry, most manufacturers still use large rolls of film for cutting and application. While large rolls of film are more convenient for large-area application, they need to be cut into small strips before being used for edge application, which requires high processing standards.

[0005] At the same time, due to their own elasticity, the cut strips are more prone to deformation, which can also cause stretching and deformation during the conveying process due to tension, resulting in deviations in the cut length and affecting the quality of the finished product. Summary of the Invention

[0006] To address the shortcomings of existing production technologies, the applicant provides a photovoltaic module strip film laying equipment and method with a reasonable structure. This method uses small strip film rolls combined with a tension-free feeding method to ensure the accuracy of the application and reduce the difficulty of operation.

[0007] The technical solution adopted in this invention is as follows:

[0008] A method for laying strip film in a photovoltaic module includes the following steps:

[0009] Material feeding stage:

[0010] The material changing gripper grabs the head of the material roll, pulls out the film belt, and then pulls it to the tension release station, so that the film belt loses additional traction force; during the process of the material changing gripper grabbing the head, the time interval between switching each material roll is equal;

[0011] Traction phase:

[0012] The membrane belt is pulled to the tension release station. After the first power feeding, the membrane belt with tension naturally falls to the expected length. Then, the naturally falling membrane belt segment is driven out again by the motor.

[0013] Application stage:

[0014] The tension-free film strip that hangs down naturally is punched and cut to obtain the desired length of the attachment section. The material picker grips the attachment section and transports it to the film application position on the photovoltaic panel for pressing and film application.

[0015] During the feeding stage, the specific steps to ensure that the switching time interval for each roll is equal are as follows:

[0016] The material-changing jaws sequentially grab the beginning of the same row of material rolls; after one row of material rolls is clamped, the material-changing jaws clamp the beginning of another row of material rolls at the same height.

[0017] The heads of each feed roll are pulled to the same horizontal plane.

[0018] The output direction of the film roll is first corrected and turned to be in the same plane and in the same direction before being picked up by the material changing gripper.

[0019] The process of tension release is as follows:

[0020] The membrane belt is pulled to the first electrically driven position by the material changing gripper, and is clamped and limited by the first electrically driven position and the second electrically driven position.

[0021] The membrane belt is continuously powered forward by the first electrically driven position; at this point, no further power is applied to the membrane belt, and the membrane belt output from the first electrically driven position naturally hangs down between the two electrically driven positions.

[0022] When the length of the drooping film belt reaches the expected requirement, the first electric drive brakes, and the second electric drive drives the naturally drooping film belt to output. At this time, there is no material roll or tension force from the first electric drive on the film belt.

[0023] After the drooping membrane belt is conveyed, the second electric drive brakes, and the first electric drive outputs the membrane belt again.

[0024] The membrane strip between the first and second electric drives either hangs down directly or is lifted to form multiple hanging points.

[0025] Another way to release tension is to have the first electric drive position and the second electric drive position operate at different speeds simultaneously, with the output speed of the first electric drive position being greater than the output speed of the second electric drive position.

[0026] During the application process, the material pick-and-place jaws move in a translating motion to apply the material to the side parallel to the film exit direction; and move in a turning motion to apply the material to the side perpendicular to the film exit direction.

[0027] The equipment used in the photovoltaic module strip film laying method includes a material roll rack and a film application machine frame.

[0028] Several rolls of film are arranged in layers on the film roll rack, and guide rollers are installed between the layers of film rolls; after passing through the guide rollers, the film belt enters the same plane.

[0029] A tensionless feeding assembly is installed on one side of the material roll holder in the output direction. The tensionless feeding assembly includes a first power group and a second power group spaced apart. A rod group is installed between the first power group and the second power group, and the rod group is used to lift the tensionless film belt. The first power group and the second power group operate alternately or differentially.

[0030] The output direction side of the tensionless feeding assembly has a drilling station and a flying knife station.

[0031] The material roll rack and the film applicator frame are equipped with end-to-end rails on the same side wall. The material roll rack rails are slidably connected to the material changing grippers, the film applicator frame rails are slidably connected to the cross frame, and the cross frame is slidably connected to the lifting device. The lifting device drives the material picking and placing grippers.

[0032] The first and second power groups without tensioning feeding components both include a drive roller and a driven pressure roller, and the driven pressure rollers of the two groups are driven synchronously by the same lifting power source.

[0033] The beneficial effects of this invention are as follows:

[0034] This invention employs a material-changing gripper and a material-picking / discharging gripper, providing two gripping actions for long strip film sheets: gripping the material head and adsorbing the entire film sheet. It is especially suitable for feeding small strip film rolls.

[0035] Since the small rolls of film used do not require additional cutting, they only need to be cut once after being pulled to the expected length to obtain the film strip to be attached. In this invention, the cutting position of the film strip is set between the movement paths of the two sets of grippers. After the pick-and-place grippers grasp the film strip of the expected length, the perforated and adsorption-limited film strip is cut, and then the pick-and-place grippers place the film strip onto the photovoltaic panel through multi-directional rotation.

[0036] The purpose of using two different sets of grippers is twofold: firstly, the smaller grippers can effectively and quickly hold the material head, while the larger grippers can accurately pick up and place the film belt; secondly, the range of motion required for each gripper is reduced and the number of movements is decreased. Compared with the conventional single-gripper operation, this can effectively reduce the difficulty of path setting, achieve seamless connection between the two steps, and improve work efficiency.

[0037] During the film belt feeding process, this invention eliminates the conventional continuous power conveying method, such as the continuous rotation and unwinding of the film belt roll. This traditional feeding method is affected by the elastic deformation of the film belt itself, making it difficult to accurately control the deformation of the film belt. Under the action of mechanical power output and frictional resistance, the output length of the film belt may be the stretched length of the film belt, resulting in the film belt losing tension and shrinking back after cutting, and deviations in the cut length.

[0038] In this invention, during the output of the material roll, a section of the film belt to be transported is added, naturally drooping. This section of the film belt is subjected to its own weight and no other external forces, ensuring that the film belt is in an initial, undeformed state. Using a second power unit to output this section of the film belt significantly reduces the degree of film belt deformation and improves the cutting accuracy of the film belt. This reduces errors caused by excessive tension in the EVA strip film belt.

[0039] The use of small membrane rolls avoids long material change intervals. If conventional large membrane rolls are used, firstly, the feeding process is difficult; secondly, due to equipment size limitations, a single machine can typically only hold one or a few large membrane rolls. When a large membrane roll runs out and needs to be replaced, the difficult operation causes the equipment to shut down for a period. The small membrane rolls provided by this invention can be fed from a buffer roll during material change, eliminating the need to stop the equipment.

[0040] The feeding and attaching structure is symmetrically set up. Specifically, the four sides of the photovoltaic panel are grouped into groups of two opposite sides. Each group of opposite sides is equipped with a feeding device to pull and feed the film tape.

[0041] Since the structures on both sides are exactly the same, the applicability of the single-sided feeding device and the single-sided gripper is improved when actually producing or assembling the equipment. Pre-assembly can be used to reduce the complexity of the equipment itself.

[0042] Meanwhile, since the specifications of each batch of photovoltaic panels may be different, the two sets of feeding devices and grippers no longer need to specify which side to cut. They can directly select the side to be attached according to the expected length of the film tape, thus reducing the limitations of use. Attached Figure Description

[0043] Figure 1 This is a top view of the entire machine of the present invention.

[0044] Figure 2 This is a perspective view of the entire machine of the present invention.

[0045] Figure 3 This is a perspective view of the feeding device of the present invention.

[0046] Figure 4 This is a perspective view of the feeding device of the present invention from another angle.

[0047] Figure 5 This is a schematic diagram showing the relative positional relationship between the guide roller assembly and a single material tray according to the present invention.

[0048] Figure 6 This is a schematic diagram of a set of guide rollers in the present invention.

[0049] Figure 7This is a schematic diagram of a set of guide rollers in the present invention from another perspective.

[0050] Figure 8 This is a schematic diagram of the pressure plate movement structure in this invention.

[0051] Figure 9 This is a schematic diagram showing the relative positional relationship between the buffer roll and the guide roller group in this invention.

[0052] Figure 10 This is a schematic diagram of the tension-free feeding structure in this invention.

[0053] Figure 11 This is a schematic diagram of the tension-free feeding structure behind the hidden frame in this invention.

[0054] Figure 12 This is a structural schematic diagram from another perspective of the tension-free feeding mechanism hidden behind the frame in this invention.

[0055] Figure 13 This is a schematic diagram illustrating the movement principle of the lifting pressure rod in this invention.

[0056] Figure 14 This is a schematic diagram of the motion path of the material changing gripper and the material picking and unpicking gripper in this invention.

[0057] Figure 15 This is a schematic diagram of the material handling structure in this invention.

[0058] The components include: 1. Feeding device; 2. Film applicator body; 3. Sequential feeding roll assembly; 4. Buffer roll; 5. Guide roller assembly; 6. First power unit; 7. Second power unit; 8. Slow-release zone; 9. Support rod; 10. Lifting pressure rod; 11. Electric motor; 12. Connecting plate.

[0059] 101. Material changing track; 102. Material changing gripper;

[0060] 201. Material handling track; 202. Material handling gripper; 203. Displacement track; 204. Lifting device; 205. Crossbeam;

[0061] 501. Directional slant roller; 502. Positioning roller; 503. Feeding guide roller; 504. Pressure plate; 505. Pressure cylinder;

[0062] 601. Feeding motor; 602. Drive roller; 603. Driven pressure roller. Detailed Implementation

[0063] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0064] A method for laying strip film in a photovoltaic module includes the following steps:

[0065] Material feeding stage:

[0066] The material changing gripper grabs the head of the material roll, pulls out the film belt, and then pulls it to the tension release station, so that the film belt loses additional traction force; during the process of the material changing gripper grabbing the head, the time interval between switching each material roll is equal;

[0067] Traction phase:

[0068] The membrane belt is pulled to the tension release station. After the first power feeding, the membrane belt with tension naturally falls to the expected length. Then, the naturally falling membrane belt segment is driven out again by the motor.

[0069] Application stage:

[0070] The tension-free film strip that hangs down naturally is punched and cut to obtain the desired length of the attachment section. The material picker grips the attachment section and transports it to the film application position on the photovoltaic panel for pressing and film application.

[0071] During the feeding stage, the specific steps to ensure that the switching time interval for each roll is equal are as follows:

[0072] The material-changing jaws sequentially grab the beginning of the same row of material rolls; after one row of material rolls is clamped, the material-changing jaws clamp the beginning of another row of material rolls at the same height.

[0073] The heads of each feed roll are pulled to the same horizontal plane.

[0074] The output direction of the film roll is first corrected and turned to be in the same plane and in the same direction before being picked up by the material changing gripper.

[0075] The process of tension release is as follows:

[0076] The membrane belt is pulled to the first electrically driven position by the material changing gripper, and is clamped and limited by the first electrically driven position and the second electrically driven position.

[0077] The membrane belt is continuously powered forward by the first electrically driven position; at this point, no further power is applied to the membrane belt, and the membrane belt output from the first electrically driven position naturally hangs down between the two electrically driven positions.

[0078] When the length of the drooping film belt reaches the expected requirement, the first electric drive brakes, and the second electric drive drives the naturally drooping film belt to output. At this time, there is no material roll or tension force from the first electric drive on the film belt.

[0079] After the drooping membrane belt is conveyed, the second electric drive brakes, and the first electric drive outputs the membrane belt again.

[0080] The membrane strip between the first and second electric drives either hangs down directly or is lifted to form multiple hanging points.

[0081] Another way to release tension is to have the first electric drive position and the second electric drive position operate at different speeds simultaneously, with the output speed of the first electric drive position being greater than the output speed of the second electric drive position.

[0082] During the application process, the material pick-and-place jaws move in a translating motion to apply the material to the side parallel to the film exit direction; and move in a turning motion to apply the material to the side perpendicular to the film exit direction.

[0083] The equipment used in the photovoltaic module strip film laying method includes a material roll rack and a film application machine frame.

[0084] Several rolls of film are arranged in layers on the film roll rack, and guide rollers are installed between the layers of film rolls; after passing through the guide rollers, the film belt enters the same plane.

[0085] A tensionless feeding assembly is installed on one side of the material roll holder in the output direction. The tensionless feeding assembly includes a first power group and a second power group spaced apart. A rod group is installed between the first power group and the second power group, and the rod group is used to lift the tensionless film belt. The first power group and the second power group operate alternately or differentially.

[0086] The output direction side of the tensionless feeding assembly has a drilling station and a flying knife station.

[0087] The material roll rack and the film applicator frame are equipped with end-to-end rails on the same side wall. The material roll rack rails are slidably connected to the material changing grippers, the film applicator frame rails are slidably connected to the cross frame, and the cross frame is slidably connected to the lifting device. The lifting device drives the material picking and placing grippers.

[0088] The first and second power groups without tensioning feeding components both include a drive roller and a driven pressure roller, and the driven pressure rollers of the two groups are driven synchronously by the same lifting power source.

[0089] The specific steps and equipment used in this invention are as follows:

[0090] like Figure 1 and Figure 2 The diagram shown is an overall schematic diagram of the present invention. Figure 1 This is a top view, showing that the main body 2 of the film applicator has two feeding devices 1, in conjunction with reference. Figure 3 and Figure 4 The structure of the feeding device 1 is shown.

[0091] like Figure 3 and Figure 4 As shown, the frame of the feeding device 1 in this invention is divided into upper and lower layers. The lower layer consists of several parallel material rolls, forming a sequential feeding material roll group 3. The upper layer of the frame is equipped with a buffer material roll 4.

[0092] The feeding direction of the film belt is along the long side of the frame in the figure. The circular rolls of the sequentially fed material roll group 3 are perpendicular to the feeding direction. Therefore, the sequentially fed material roll group 3 needs to be guided by the turning inclined roller 501 in the guide roller group 5 to form a feeding path parallel to the long side of the frame.

[0093] The buffer roll 4 is parallel to the film belt feeding path, so the film belt on the buffer roll 4 only needs to be pulled by the uppermost feeding guide roller 503 in the guide roller group 5 to be transported to the expected position.

[0094] like Figure 5 and Figure 6 The diagram shown is a schematic diagram of the guide roller group 5 in this invention.

[0095] Each roll in the material roll group 3 corresponds to a set of guide roller groups 5. A set of guide roller groups 5 includes a steering roller 501 with the lowest vertical height, a positioning roller 502 that is slightly higher than the steering roller 501, and a feeding guide roller 503 that is the highest and coplanar with the feeding plate of the film belt conveyor.

[0096] For example, 5- Figure 7 As shown, in this embodiment, taking the synchronous conveying of three membrane belts as an example, each membrane belt corresponds to a steering roller 501, and the three steering rollers 501 are arranged in sequence at different positions in the forward direction of the membrane belt in order to provide ample space for roller installation.

[0097] In a set of guide rollers 5, one positioning roller 502 is provided. After the three film strips pass around the positioning roller 502 from bottom to top, they become vertically upward output.

[0098] A set of two feeding guide rollers 503 are provided. The film belt drawn up from below passes through the feeding guide rollers 503 and is output horizontally on the feeding plate. At this time, the material head can be clamped by the material changing claw 102 to pull out the film belt.

[0099] The aforementioned membrane belt traction is the membrane belt output method in the sequential feeding material roll group 3; the material changing gripper 102 from... Figure 4 From the right side of the center position, the film strip heads of the sequentially feeding material rolls 3 are gripped and fed in a left-to-right order. When the film strip in the sequentially feeding material rolls 3 is used up, the material changing jaws 102 grip the head of the buffer material roll 4 for use. At this time, the material rolls below can be replaced; when the film strip in the buffer material roll 4 is used up, the film strips of the sequentially feeding material rolls 3 below can continue to be used.

[0100] In this invention, the purpose of adding the buffer roll 4 is to buy time for changing the roll. Therefore, theoretically, multiple buffer rolls 4 can be set at the top, or they can have the same structure as the roll group below. However, considering the simplification of the equipment and the fact that a single buffer roll 4 can already make up for the shortcomings of the prior art, the preferred method in this embodiment is to add a roll parallel to the direction of the film belt's movement at the top. This minimizes the processing difficulty required for the improvement, and the film belt does not need to be turned when it is pulled out, making it the optimal solution.

[0101] like Figure 9 As shown, after the film strip of the buffer roll 4 is drawn out from top to bottom, it passes through a set of feeding guide rollers 503, so that the film strip is located on the horizontal surface of the feeding plate, which makes it easier for the subsequent material changing claw 102 to hold the material head.

[0102] To ensure that other material heads to be clamped can be accurately positioned at the gripping location, this solution also provides, for example... Figure 7 and Figure 8 The pressure plate 504 is shown. An installation space is provided below the feeding plate, and the pressure cylinder 505 is located within this space. The piston rod of the pressure cylinder 505 extends upward through the feeding plate, driving the pressure plate 504 to move up and down. When the pressure plate 504 presses down, it limits the material head; when the material head is gripped by the grippers and ready for traction, the pressure plate 505 lifts up, allowing the film belt to be output.

[0103] In order to accommodate the output of elastic material film strips such as EVA, reduce the deformation of elastic material film strips, and ensure cutting accuracy, a tension-free conveying structure is provided in this invention.

[0104] Reference Figure 10 , Figure 11 The feeding device has a frame as the installation reference, and the frame is equipped with two sets of power units, namely the first power unit 6 and the second power unit 7, which are symmetrically arranged.

[0105] A slow-release zone 8 is reserved between the first power unit 6 and the second power unit 7, for reference. Figure 10 The sustained-release zone 8, located in the middle of the frame, is disconnected, and the membrane strip between the first power unit 6 and the second power unit 7 falls into the sustained-release zone 8. The first power unit 6 continuously outputs for a period of time, while the second power unit 7 does not work during the same period, causing the length of the membrane strip between the first power unit 6 and the second power unit 7 to be greater than the width of the sustained-release zone 8, and the membrane strip hangs freely.

[0106] The first power group 6 and the second power group 7 have the same structure. Taking the first power group 6 as an example, refer to... Figure 11The system includes a feeding motor 601, which is belt-driven to a drive roller 602. A driven pressure roller 603 is positioned above the drive roller 602 and is driven up and down by a cylinder. The driven pressure rollers of the first power group 6 and the second power group 7 are driven by the same cylinder. When the film belt needs to be conveyed, the driven pressure roller 603 presses down, clamps the film belt with the drive roller 602, and rotates to output the film belt.

[0107] Figure 11 In the controlled-release zone 8, a support rod 9 is provided on the side. The support rod 9 is driven by a rotary cylinder or rotary motor and can swing in a circular motion. The diagram of the support rod 9 shows two extreme positions: horizontal and vertical. When the first power unit 6 is outputting the membrane belt, the support rod 9 is in a vertical position and will not affect the descent of the membrane belt. When the first power unit 6 stops outputting and the reserved amount of the membrane belt has reached the expected single discharge length requirement, the support rod 9 rotates to a horizontal position, lifting the membrane belt. At this time, the membrane belt is supported by the support rod 9 and the first power unit 6, forming a "U"-shaped drop section in the middle.

[0108] This invention also provides another method for tension-free membrane belt output. After the membrane belt is lifted from the middle by the support rod 9, the lifting pressure rods 10 on both sides of the support rod 9 are driven downward from their original position above the membrane belt, pressing the membrane belt into a state where the middle is lifted by the support rod 9 and the sides hang down, that is, the membrane belt has two hanging sections, forming a "W" shape. There is a hanging section between the first power group 6 and the support rod 9, and between the support rod 9 and the second power group 7. This structure allows for a longer single-pass reserved membrane belt length.

[0109] The output length of the membrane belt in the first power unit 6 can be determined by using a sensor to detect the drooping position of the membrane belt.

[0110] like Figure 12 and Figure 13 As shown, the structure driving the lifting pressure rod 10 uses a motor 11 to pull a transmission belt. The transmission belt holds a connecting plate 12, and the lifting pressure rod 10 is located on the connecting plate 12. During the up-and-down movement of the transmission belt, the connecting plate 12 and the lifting pressure rod 10 move up and down. There are two lifting pressure rods 10, located on both sides of the connecting plate 12, corresponding to both sides of the support rod 9. When pressing down, the support rod 9 is used as the reference point for lifting up in the middle, pressing the membrane belt on both sides of the support rod 9 into a "W" shape.

[0111] After each downward movement, the lifting lever 10 immediately resets and does not remain at the bottom.

[0112] After the first power unit 6 stops discharging material, the second power unit 7 begins to output the tension-free film belt. The output actions of both the first power unit 6 and the second power unit 7 are achieved by motors. The motors are connected to the drive belt, which in turn is connected to the drive roller. The drive roller and the driven pressure roller rotate relative to each other, pushing the clamped film belt forward.

[0113] As an alternative implementation, both the first power unit 6 and the second power unit 7 can operate continuously. Theoretically, as long as the rotational speed of the first power unit 6 is greater than that of the second power unit 7, creating a speed difference, a tension-free membrane belt can be established between them. When the drooping length of the membrane belt output by the first power unit 6 is sensed by the sensor, the first power unit 6 can pause its output until the length of the tension-free membrane belt shortens to the point where it is sensed by the upper sensor, at which point the first power unit 6 will continue to operate and output a spare membrane belt.

[0114] After the membrane tape is output from the second power unit 7, it is punched by a punching machine. Punching is a routine operation with conventional tools, and will not be described in detail in this embodiment.

[0115] The resulting film strip, after being punched, can be attached to a photovoltaic panel.

[0116] Reference Figure 1 and Figure 2 The overall structure includes a film-applying machine body 2 for laying photovoltaic panels flat. The photovoltaic panels to be applied are placed in the middle of the film-applying machine body 2. The photovoltaic panels are mostly rectangular and have four sides that need to be covered with film strips. If the photovoltaic panels are larger in length and width, additional film strips need to be applied in the middle to form a rectangular film strip border.

[0117] In this invention, unlike the large film rolls used in conventional technologies, two sets of small strip film feeding devices 1 are used to attach the horizontal and vertical strip film edges, respectively.

[0118] Since photovoltaic panels come in various specifications and have different side lengths, the placement of the long and wide sides in the first batch may change when the second batch of photovoltaic panels is laminated. Therefore, this solution provides two sets of feeding devices 1 with identical structures, symmetrically arranged at the two top corners of the photovoltaic panels.

[0119] The structure of the feeding device 1 is as follows Figure 3 and Figure 4 As shown, Figure 3 In the illustration, the feeding device 1 located in the upper left corner of the figure is used as an example.

[0120] Reference Figure 14 and Figure 15 Each feeding device 1 includes a feeding frame, and a material changing track 101 is provided on the side of the feeding frame. A material changing gripper 102 is slidably connected on the material changing track 101. The material changing gripper 102 is used to clamp the head of the material roll and pull it to the subsequent laminating machine body 2, where the material is picked up and placed by the material picking gripper 202 on the laminating machine body 2 and the laminating is completed.

[0121] The main body 2 of the film applicator has a material loading and unloading track 201 on its side wall. The material loading and unloading track 201 is collinear with the material changing track 101. A crossbeam 205 is slidably connected to the material loading and unloading track 201, and the crossbeam 205 is perpendicularly connected to the material loading and unloading tracks 201 on both sides. A displacement track 203 is provided on the crossbeam 205, and a lifting device 204 is slidably connected to the displacement track 203. The lifting device 204 drives the material loading and unloading gripper 202, which can rotate itself, thereby realizing the free movement of the material loading and unloading gripper 202 in the xyz direction and its own rotation, so as to drive the film tape to fit any edge on the photovoltaic panel.

[0122] Since the main problem to be solved by this solution is to be able to use two sets of feeding devices 1 and pick-and-place grippers 202 to apply film to the frame for different lengths and short sides, the feeding device 1 and the pick-and-place grippers 202 are each responsible for conveying the film strip forward in a straight line and driving the film strip to move parallel or rotate onto the photovoltaic panel.

[0123] In other words, the feeding device 1 only needs to output the film strip in a straight line. The two side grippers 202, taking left and right as examples, can slide linearly back and forth on the corresponding gripper track 201 on the side wall of the laminator body 2, or slide vertically on the displacement track 203, or rotate on their own and be driven by the lifting device 204. The lifting device 204 used in this embodiment can be existing equipment such as a cylinder or electric cylinder, which will not be elaborated here.

[0124] For example, after a batch of photovoltaic panels are placed, the left-side pick-and-place gripper 202 drives the film belt to move along the pick-and-place track 201 to the side of the photovoltaic panel; then it moves along the displacement track 203 to directly above the film application position, and the lifting device 204 drives it to press down to complete the film application.

[0125] The right-side pick-and-place gripper 202 drives the film belt to move along the pick-and-place track 201 to the side of the photovoltaic panel; it rotates to a state perpendicular to the pick-and-place track 201, at which point it is parallel to the opposite side of another set of films to be applied; it then moves again along the pick-and-place track 201 and the displacement track 203 to directly above the position to be applied, and the lifting device 204 drives it to press down, completing the application of the film.

[0126] The above steps can also be performed by rotating and displacing the film-applying jaws 202 on the left and displacing them on the right. This is the purpose of using a symmetrical structure in this design, namely, to improve versatility.

[0127] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A method for laying strip film in a photovoltaic module, characterized in that, Includes the following steps: Material feeding stage: The material changing gripper (102) grabs the head of the material roll, pulls out the film belt, and pulls it to the tension release station, so that the film belt loses additional traction force; during the process of the material changing gripper (102) grabbing the head of the material roll, the time interval between switching each material roll is equal; Traction phase: The membrane belt is pulled to the tension release station. After the first power feeding, the membrane belt with tension naturally falls to the expected length. Then, the naturally falling membrane belt segment is driven out again by the motor. Application stage: The tensionless film strip that is output after natural hanging is punched and cut to obtain the attachment section of the expected length. The material pick and drop clamp (202) holds the attachment section and transports it to the film application position on the photovoltaic panel for downward film application. During the feeding stage, the specific steps to ensure that the switching time interval for each roll is equal are as follows: The material changing jaws (102) sequentially grab the head of the same row of material rolls; after one row of material rolls is clamped, the material changing jaws (102) clamp the head of another row of material rolls at the same height; The material heads of each feed roll are all pulled to the same horizontal plane; The process of tension release is as follows: The membrane belt is pulled to the first electrically driven position by the material changing gripper (102), and is clamped and limited by the first electrically driven position and the second electrically driven position. The membrane belt is continuously powered forward by the first electrically driven position; at this point, no further power is applied to the membrane belt, and the membrane belt output from the first electrically driven position naturally hangs down between the two electrically driven positions. When the length of the drooping film belt reaches the expected requirement, the first electric drive brakes, and the second electric drive drives the naturally drooping film belt to output. At this time, there is no material roll or tension force from the first electric drive on the film belt. After the drooping membrane belt is conveyed, the second electric drive brakes, and the first electric drive outputs the membrane belt again. Another way to release tension is to have the first electric drive position and the second electric drive position operate at different speeds simultaneously, with the output speed of the first electric drive position being greater than the output speed of the second electric drive position.

2. The photovoltaic module strip film laying method as described in claim 1, characterized in that, The output direction of the film roll is first corrected and turned to be in the same plane and in the same direction, and then it is picked up by the material changing gripper (102).

3. The photovoltaic module strip film laying method as described in claim 1, characterized in that, The membrane strip between the first and second electric drives either hangs down directly or is lifted to form multiple hanging points.

4. The photovoltaic module strip film laying method as described in claim 1, characterized in that, During the application process, the material pick-and-place jaws (202) move in a translating motion to apply the material to the side parallel to the film exit direction; and move in a turning motion to apply the material to the side perpendicular to the film exit direction.

5. The laying equipment used in the photovoltaic module strip film laying method according to claim 1, characterized in that, Including material roll holders and film laminating machine frames, Several rolls of film are arranged in layers on the roll rack, and guide roller groups (5) are set between the layers of film rolls; after the film belt passes through the guide roller groups (5), it enters the same plane. A tensionless feeding assembly is provided on one side of the output direction of the roll holder. The tensionless feeding assembly includes a first power group (6) and a second power group (7) spaced apart. A rod group is provided between the first power group (6) and the second power group (7) for lifting the tensionless film belt. The first power group (6) and the second power group (7) operate alternately or differentially. The output direction side of the tensionless feeding assembly has a drilling station and a flying knife station. The material roll rack and the film applicator rack are provided with a track that connects end to end on the same side wall. The material roll rack is slidably connected to the track with a material changing gripper (102). The film applicator rack is slidably connected to the track with a crossbar (205). The crossbar (205) is slidably connected to a lifting device (204). The lifting device (204) drives the material picking and placing gripper (202).

6. The laying equipment as described in claim 5, characterized in that, The first power group (6) and the second power group (7) without tensioning feeding components both include an active roller and a driven pressure roller. The driven pressure rollers of the two groups are driven synchronously by the same lifting power source.

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