Photovoltaic solder strip unwinding method

Abstract

The application discloses a photovoltaic welding strip unwinding method, and relates to the photovoltaic processing field.The photovoltaic welding strip unwinding method comprises the following steps: using a motor to drive a plurality of welding strip rolls to rotate and release the welding strips; wherein the motor drives the plurality of welding strip rolls to rotate by driving a driving roller to rotate; when it is detected that the length of the welding strip released by any one of the welding strip rolls is a preset length, the corresponding welding strip roll is controlled to be separated from the driving roller to stop releasing the welding strip, and the other welding strip rolls continue to release the welding strip; when the preset length of the welding strip is released from each welding strip roll and the welding strip roll is separated from the driving roller to stop releasing the welding strip, the motor is controlled to stop working, and the unwinding is completed once.The photovoltaic welding strip unwinding method provided by the application solves the technical problems of high cost, complex structure and large space occupation in the prior art that the plurality of welding strip rolls are simultaneously unwound and need to have the same unwinding length.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic processing, and in particular to a photovoltaic ribbon unwinding method. Background Art

[0002] In the production of photovoltaic modules, it is necessary to weld the cells to each other using welding ribbons to form cell strings, and then further assemble the cell strings with other components to obtain cell modules. Usually, the number of welding ribbons required is equal to the number of main grid lines on the cell, that is, the number of welding ribbons required for welding corresponds to the number of main grid lines on a cell, and each welding ribbon requires a corresponding welding ribbon roll for unwinding; in addition, as the industry's requirements for production capacity increase, it is sometimes necessary to weld multiple cells at the same time, so the number of welding ribbon rolls required will be greater. Therefore, when welding the cells, each welding machine requires an unwinding system including multiple welding ribbon rolls for coordinated operation.

[0003] In the existing solder ribbon unwinding system, the unwinding of solder ribbon is usually completed by motor drive. Each roll of solder ribbon corresponds to an unwinding motor. This unwinding method requires a large amount of space to place and layout multiple motors and their corresponding solder ribbon rolls, plus some idler auxiliary mechanisms, resulting in each stringer needing to be equipped with a large unwinding docking station. When soldering solar cells with a large number of solder ribbons, it is easy to encounter problems such as insufficient solder ribbon unwinding space and intertwined solder ribbons. The cost is also high, and changing solder ribbons is extremely inconvenient.

[0004] In addition, for the production of photovoltaic modules, multiple welding ribbons are also required to have the same length. In a conventional welding ribbon unwinding system, the welding ribbon roll is driven by a motor to rotate to release the welding ribbon. Since the length of the welding ribbon roll released in one turn is constantly changing during the process of the welding ribbon roll being full and empty, it is impossible to know in real time how many turns the welding ribbon roll needs to make to release a certain length of welding ribbon. Therefore, other structures are required to cooperate to achieve the same length of welding ribbon released by multiple welding ribbon rolls. The general welding ribbon unwinding system is as described in the above patent. Each welding ribbon roll is equipped with a motor. When the length of the released welding ribbon reaches the required length, the motor of the welding ribbon roll is stopped to control the length of all welding ribbon rolls to be the same. Although the motor can control the welding ribbon roll to stop unwinding, this control method requires a motor for each welding ribbon roll, which is not only costly but also has complicated operating procedures. Summary of the Invention

[0005] The purpose of this application is to provide a photovoltaic welding tape unwinding method, which solves the technical problems in the prior art of high cost, complex structure, large space occupation and inconvenience in changing welding tape rolls when multiple welding tape rolls are unwound at the same time and the unwinding lengths need to be the same.

[0006] This application is implemented as follows:

[0007] The present application provides a photovoltaic ribbon unwinding method, which comprises the following steps:

[0008] S10, using a motor to drive multiple soldering ribbon reels to rotate and release the soldering ribbons simultaneously;

[0009] The motor drives a driving roller to rotate, thereby driving a plurality of welding ribbon rolls in contact with the driving roller to rotate simultaneously;

[0010] S20, when it is detected that the length of the welding ribbon unwound by any welding ribbon roll is a preset length, the corresponding welding ribbon roll is controlled to disengage from the driving roller to stop unwounding, while the other welding ribbon rolls continue unwounding;

[0011] S30. When each welding ribbon roll has unwound all the welding ribbons of the preset length and has disengaged from the driving roller to stop unwinding, the motor is controlled to stop working, and one unwinding is completed.

[0012] In some optional embodiments, controlling the corresponding welding ribbon roll to separate from the contact driving roller includes:

[0013] Apply an upward force to the corresponding ribbon roll from below; or,

[0014] Apply an upward force to the corresponding ribbon roll from above; or,

[0015] Apply a lateral force to the corresponding solder ribbon roll from the side.

[0016] In some optional embodiments, the driving roller is arranged on one side of the welding ribbon roll, and at least one idle wheel is arranged on the other side of the welding ribbon roll opposite to the driving roller. A plurality of the welding ribbon rolls are placed between the idle wheel and the driving roller, and the idle wheel and the driving roller cooperate to rollingly support both sides of the welding ribbon roll.

[0017] In some optional implementation schemes, in step S20, a displacement sensor is used to detect whether the length of the soldering ribbon unrolled from any one of the soldering ribbon rolls reaches a preset length.

[0018] In some optional embodiments, before step S10, the following steps may be further performed:

[0019] S01, pulling the welding ribbons unwound from the plurality of welding ribbon reels to a preset length along the unwinding direction by a traction mechanism, and sending a signal to control the motor to start working while or after the welding ribbons are being pulled;

[0020] Repeat steps S01 to S30.

[0021] In some optional embodiments, before executing step S01 of controlling the motor to start working, all of the plurality of welding ribbon rolls are controlled to contact the driving roller.

[0022] In some optional embodiments, in step S20, a plurality of single-welding-roll unwinding sensing mechanisms corresponding to the welding ribbon rolls are used to detect whether the length of the welding ribbon unwound from the corresponding welding ribbon roll reaches a preset length;

[0023] Each of the single welding coil unwinding sensing mechanisms includes a guide rod connected to a support and arranged in a vertical direction, a buffer seat slidably sleeved on the guide rod, a buffer wheel connected to the buffer seat, a proximity sensor located on the moving path of the buffer wheel along the guide rod, and a first guide wheel group and a second guide wheel group arranged on the unwinding path corresponding to the welding ribbon coil and close to the welding ribbon coil; the welding ribbon unwound from the welding ribbon coil passes through the first guide wheel group, the buffer wheel, and the second guide wheel group in sequence before being sent out;

[0024] The photovoltaic ribbon unwinding method comprises:

[0025] S01. The motor is controlled to be inoperative, and the welding ribbons unwound from the plurality of welding ribbon reels are pulled out to a preset length along the unwinding direction by a traction mechanism; wherein, while the welding ribbons are being pulled, the corresponding buffer wheels are driven to leave the sensing area of ​​the proximity sensor, and the proximity sensor sends a signal to control the motor to start operating;

[0026] S10, the motor drives multiple welding ribbon rolls to rotate and release the welding ribbons simultaneously;

[0027] S20. When any one of the proximity sensors detects that the corresponding buffer wheel returns to its sensing area again, the proximity sensor transmits a signal and controls the corresponding welding ribbon roll to disengage from the driving roller so that the length of the welding ribbon unwound by the corresponding welding ribbon roll is a preset length, and the other welding ribbon rolls continue to unwrap.

[0028] S30. When each of the welding ribbon rolls has unwound all the welding ribbons of the preset length and has lost contact with the driving roller to stop unwinding, the motor is controlled to stop working, completing one unwinding operation.

[0029] In some optional embodiments, in step S20, a plurality of single-welding-roll unwinding sensing mechanisms corresponding to the welding ribbon rolls are used to detect whether the length of the welding ribbon unwound from the corresponding welding ribbon roll reaches a preset length;

[0030] Wherein, each of the single welding coil unwinding sensing mechanisms includes a tension sensor arranged on the unwinding path corresponding to the welding ribbon coil, and the tension sensor is used to sense the tension value of the welding ribbon;

[0031] The photovoltaic ribbon unwinding method comprises:

[0032] S01. Control the motor to not work, and pull the plurality of unwound welding ribbons of the welding ribbon reels out to the preset length along the unwinding direction through the traction mechanism; wherein, while or after the welding ribbons are being pulled, when the tension sensor senses that the tension value of the unwound welding ribbon is greater than a preset range, the tension sensor sends a signal to control the motor to start working;

[0033] S10, the motor drives multiple welding ribbon rolls to rotate and release the welding ribbons simultaneously;

[0034] S20. When any one of the tension sensors detects that the tension value of the unwound soldering ribbon is within the preset range, the tension sensor transmits a signal and controls the corresponding soldering ribbon roll to stop rotating and unwinding so that the length of the soldering ribbon unwound by the corresponding soldering ribbon roll is the preset length, and the other soldering ribbon rolls continue unwinding.

[0035] S30. When each of the welding ribbon rolls has unwound all the welding ribbons of the preset length and has lost contact with the driving roller to stop unwinding, the motor is controlled to stop working, completing one unwinding operation.

[0036] In some optional embodiments, a starting reference position is provided on the unwinding path of each of the welding ribbon rolls, and the starting reference position is used as the starting position of the traction mechanism each time the traction mechanism takes the welding ribbon;

[0037] The step S01 includes pulling the soldering ribbons unwound from the plurality of soldering ribbon reels to the preset length from the starting reference position by a pulling mechanism, and then cutting the soldering ribbons unwound from each of the soldering ribbon reels at the starting reference position.

[0038] In some optional embodiments, during the process of the motor driving the plurality of welding ribbon reels to rotate and unwind the welding ribbons simultaneously, a force is applied to the unwinding plurality of welding ribbons at a position before the starting reference on the unwinding path to fix them;

[0039] Before the welding ribbons unwound from the plurality of welding ribbon rolls are pulled out to the preset length along the unwinding direction by the traction mechanism, the acting force is released.

[0040] The beneficial effects of the present application are: the photovoltaic welding tape unwinding method provided by the present application includes the following steps: using a motor to drive multiple welding tape rolls to rotate and release the welding tape at the same time; wherein, the motor drives multiple welding tape rolls in contact with the driving roller to rotate simultaneously by driving a driving roller; when it is detected that the welding tape length released by any welding tape roll is a preset length, the corresponding welding tape roll is controlled to disengage from the driving roller to stop unloading, and the other welding tape rolls continue to unload; when all the welding tape rolls have released the preset length of welding tape and disengaged from the driving roller to stop unloading, the motor is controlled to stop working to complete one unloading.

[0041] The photovoltaic welding ribbon unwinding method provided in the present application uses a rotating drive roller (a motor) to drive multiple welding ribbon rolls to unwind at the same time and adopts a method of individually detecting whether the unwinding of each welding ribbon roll has reached a preset length to compensate for the unwinding length individually. The structure is simple, greatly reduces the space occupied by the equipment, is low in cost, and enables multiple welding ribbon rolls to perform unwinding operations at the same time with the same unwinding length, and the control method of the method is simple.

[0042] Since the unwinding control method of the present invention is to drive the unwinding of the welding ribbon roll by friction driving by contacting the driving roller with the outer wall of the welding ribbon roll, there is no need to adopt the traditional method of passing the welding ribbon roll through the motor shaft to drive the unwinding of the welding ribbon roll, nor is there a mechanism for holding the motor shaft, which makes it simpler and faster to replace the welding ribbon roll. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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 use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0044] Figure 1 This is an example diagram of a photovoltaic ribbon unwinding method according to an embodiment of the present application;

[0045] Figure 2 A schematic diagram of the three-dimensional structure of a photovoltaic ribbon unwinding system used in the photovoltaic ribbon unwinding method provided in an embodiment of the present application;

[0046] Figure 3 A schematic structural diagram showing the connection between the ribbon reel, the single-reel displacement assembly, and the support platform of the photovoltaic ribbon unwinding system used in the photovoltaic ribbon unwinding method provided in an embodiment of the present application from a first perspective;

[0047] Figure 4 A schematic structural diagram from a second perspective of the connection between the ribbon reel, the single-reel displacement assembly, and the support platform of the photovoltaic ribbon unwinding system used in the photovoltaic ribbon unwinding method provided in an embodiment of the present application;

[0048] Figure 5 A schematic diagram of a photovoltaic ribbon unwinding method provided in another embodiment of the present application using a photovoltaic ribbon unwinding system and a traction mechanism to unwind the ribbon

[0049] Figure 6 A schematic structural diagram of a photovoltaic ribbon unwinding method using a tension sensor as a single-weld-roll unwinding sensing mechanism in another embodiment of the present application;

[0050] Figure 7A schematic structural diagram of a photovoltaic ribbon unwinding method provided in another embodiment of the present application using a cylinder to drive an idler wheel to move to push the corresponding ribbon roll to contact or detach from a drive roller.

[0051] In the figure: 100, support; 110, welding tape roll; 120, driving mechanism; 121, driving roller; 122, motor; 123, transmission belt; 130, single welding tape displacement assembly; 131, cylinder; 140, support platform; 141, arc surface; 150, idler wheel; 161, first guide wheel group; 162, second guide wheel group; 170, limit plate; 180, tension sensor; 200, single welding tape unwinding sensing mechanism; 210, guide rod; 220, buffer seat; 230, buffer wheel; 240, proximity sensor; 250, clamp; 260, clamp driving mechanism; 300, welding tape. DETAILED DESCRIPTION

[0052] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0053] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0054] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0055] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0056] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0057] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0058] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0059] The features and performance of the photovoltaic ribbon unwinding method of the present application are further described in detail below in conjunction with the embodiments.

[0060] This application provides a photovoltaic ribbon unwinding method for simultaneously unwinding multiple ribbons from multiple ribbon rolls, ensuring that the length of ribbon unwound from each roll is the same. The unwound ribbons are then placed simultaneously on a carrier substrate. Depending on the specific placement requirements, the carrier substrate can be either a flexible film (such as EVA film) or a solar cell (in which case the ribbons are placed at positions corresponding to the grid lines of the solar cell).

[0061] Since the welding ribbon is placed in multiple times, multiple sections are placed at the same time each time. After the multiple sections of welding ribbon with the same length are placed, they are cut and then the next multiple sections of welding ribbon are placed.

[0062] The photovoltaic welding tape unwinding method provided in the present application uses a motor to drive the driving roller to rotate and thereby drive multiple welding tape rolls to unwind at the same time, and adopts a method of individually detecting whether each welding tape roll has reached a preset length and thus individually compensating the unwinding length. The structure is simple, greatly reduces the space occupied by the equipment, is low in cost, and enables multiple welding tape rolls to perform unwinding operations at the same time with the same unwinding length, and the control method of the method is simple.

[0063] For the convenience of display and description, the embodiment of the present application is described in detail using 5 soldering ribbon rolls as an example. In actual use, the number of soldering ribbon rolls to be unwound is set according to the actual situation, and can be six to ten, ten to twenty, or even more or less. Specifically, Figures 1 to 7 As shown, this embodiment provides a photovoltaic ribbon unwinding method, which includes the following steps:

[0064] Step S10, use a motor 122 to drive five welding ribbon rolls 110 to rotate and release the welding ribbon simultaneously; this embodiment uses a photovoltaic welding ribbon unwinding system to realize that one motor 122 drives five welding ribbon rolls 110 to rotate and release the welding ribbon simultaneously, and the photovoltaic welding ribbon unwinding system includes a support 100, five welding ribbon rolls 110 arranged side by side and a driving mechanism 120.

[0065] The photovoltaic ribbon unwinding system includes a support 100, wherein a ribbon roll 110 rotates to unwind the ribbon 300. A drive mechanism 120 includes a drive roller 121 connected to the support 100 and a drive device for driving the drive roller 121 to rotate about its own axis. The drive device includes a motor 122 fixed to the support 100 and a transmission belt 123 with two ends respectively sleeved on the output shaft of the motor 122 and one end of the drive roller 121. When the output shaft of the motor 122 rotates, the transmission belt 123 drives the drive roller 121 to rotate. When the drive roller 121 rotates, it drives the individual ribbon rolls 110 in contact with the drive roller 121 to rotate. In other optional embodiments, the motor 122 can also drive the drive roller 121 to rotate through other means, such as gear transmission. Furthermore, multiple ribbon rolls 110 are arranged along the axis of the drive roller 121, so that one drive roller 121 can rotate multiple ribbon rolls 110 simultaneously.

[0066] S20. When it is detected that the length of the soldering ribbon unwound from any soldering ribbon roll 110 is a preset length, the corresponding soldering ribbon roll 110 is controlled to disengage from the contact driving roller 121 to stop unwinding, while the other soldering ribbon rolls 110 continue unwinding. The photovoltaic soldering ribbon unwinding system used in this embodiment also includes five single soldering ribbon displacement assemblies 130 and five single soldering ribbon unwinding sensing mechanisms 200 corresponding to the soldering ribbon rolls 110 one by one. The single soldering ribbon displacement assembly 130 is used to drive the corresponding soldering ribbon roll 110 to disengage from or contact the driving roller 121 again, so that the rotating driving roller 121 stops driving or drives the corresponding soldering ribbon roll 110 to rotate again. The single soldering ribbon unwinding sensing mechanism 200 is provided on the unwinding path of the corresponding soldering ribbon roll 110, and is used to detect whether the length of the soldering ribbon unwound from the corresponding soldering ribbon roll 110 reaches the preset length.

[0067] S30. When all the welding ribbons 110 have unwound the preset length and are out of contact with the driving roller 121 and stop unwinding, the motor 122 is controlled to stop working, and one unwinding is completed.

[0068] The preset length is the length of the soldering tape that is released from the required soldering tape roll each time, which is determined according to actual needs.

[0069] The photovoltaic welding ribbon unwinding method provided in the present application uses a rotating drive roller (a motor) to drive multiple welding ribbon rolls to unwind at the same time and adopts a method of individually detecting whether the unwinding of each welding ribbon roll has reached a preset length to compensate for the unwinding length individually. The structure is simple, greatly reduces the space occupied by the equipment, is low in cost, and enables multiple welding ribbon rolls to perform unwinding operations at the same time with the same unwinding length, and the control method of the method is simple.

[0070] In another embodiment, a drive roller 121 is provided on one side of the welding ribbon roll 110, and at least one idler wheel 150 is provided on the other side of the welding ribbon roll 110 opposite the drive roller 121. Multiple welding ribbon rolls 110 are placed between the idler wheel 150 and the drive roller 121. The idler wheel 150 and the drive roller 121 cooperate to roll and support the bottom sides of the welding ribbon roll 110. By providing the idler wheel 150 and cooperating with the drive roller 121 to roll and support the bottom sides of the welding ribbon roll 110, the stable rotation of the welding ribbon roll 110 can be ensured to unwind the welding ribbon 300. In other optional embodiments, the number of idler wheels 150 can also be multiple, with one idler wheel 150 corresponding to each welding ribbon roll 110.

[0071] As another embodiment, controlling the corresponding welding ribbon roll 110 to disengage from the rotating drive roller 121 includes: applying an upward thrust from below the corresponding welding ribbon roll 110; or applying an upward gripping force from above the corresponding welding ribbon roll 110; or applying a sideways pulling force from the side of the corresponding welding ribbon roll 110. These methods can each individually control the unwinding of each welding ribbon roll 110, thereby achieving individual compensation for the unwinding length, and further, in conjunction with a single motor 122, multiple welding ribbon rolls can be simultaneously unwound to the same length.

[0072] As one of the preferred embodiments, an upward thrust is applied to the corresponding welding ribbon roll 110 from below, specifically: Figure 3 、 Figure 4 As shown, each single welding coil displacement assembly 130 includes a support 140 provided below the corresponding welding ribbon roll 110 and a cylinder 131 provided below the support 140. The cylinder rod of the cylinder 131 is connected to the bottom of the support 140 to drive the support 140 to rise and fall. The top of the support 140 is provided with an arc-shaped surface 141 in contact with the welding ribbon roll 110 for support. The arc-shaped surface 141 can adapt to and stably support the rotating welding ribbon roll 110, thereby increasing the friction force between the support 140 and the welding ribbon roll 110. The cylinder rod of the cylinder 131 is telescopic to drive the support 140 to rise and fall so that the welding ribbon roll 110 supported by the support 140 contacts or separates from the driving roller 121.

[0073] In other optional embodiments, the single welding coil displacement assembly 130 may also be a clamping jaw used to drive the welding ribbon roll 110 to move so as to disengage from or re-engage the drive roller 121. The clamping jaw or cylinder used to drive the welding ribbon roll 110 to move may be disposed not only below the welding ribbon roll 110, but also above or to the side of the welding ribbon roll 110. For example, an upward gripping force may be applied to the corresponding welding ribbon roll 110 from above. Specifically, the clamping jaw is disposed directly above the welding ribbon roll 110. When the welding ribbon roll 110 needs to be disengaged from the drive roller 121, the clamping jaw clamps the welding ribbon roll 110 from top to bottom and then lifts it upward to disengage from the drive roller 121.

[0074] For another example, a lateral pulling force is applied to the corresponding welding ribbon roll 110 from the side thereof. Specifically, in the photovoltaic welding ribbon unwinding system of this embodiment, the support 100 is connected to five idler wheels 150 corresponding to the welding ribbon roll 110 one by one, the five idler wheels 150 are sleeved on five idler wheel shafts, and the five welding ribbon rolls 110 are placed between the five idler wheels 150 and the driving roller 121. The five idler wheels 150 respectively cooperate with the driving roller 121 to roll and support the bottom sides of the five welding ribbon rolls 110, such as Figure 7As shown, the idler wheel 150 and the drive roller 121 cooperate to roll and support both sides of the bottom of the welding ribbon roll 110, thereby ensuring the stable rotation of the welding ribbon roll 110 to unwind the welding ribbon 300. The single welding coil displacement assembly 130 includes a support 140 provided below the corresponding welding ribbon roll 110 and a cylinder 131 corresponding to each idler wheel 150. The cylinder 131 is used to drive the corresponding idler wheel shaft to move horizontally away from or closer to the welding ribbon roll 110 to separate the corresponding welding ribbon roll 110 from the drive roller 121, or to push the corresponding welding ribbon roll 110 into contact with the drive roller 121 through the idler wheel 150. By setting the cylinder 131 to push the idler wheel 150 on one side of the bottom of the welding ribbon roll 110 to move, the side of the welding ribbon roll 110 is pushed, so that the welding ribbon roll 110 moves to contact or separate from the drive roller 121, thereby controlling the drive roller 121 to drive or stop driving the corresponding welding ribbon roll 110 to rotate and unwind the welding ribbon.

[0075] The above three specific control methods correspond to the ways in which the welding ribbon roll 110 is separated from the contact driving roller 121 , and are simple to operate and convenient to control.

[0076] Taking the preferred method of applying an upward thrust from the bottom of the corresponding welding ribbon roll 110 as an example, the unwinding method is further described:

[0077] In the welding tape unwinding preparation state, the cylinder rod of the cylinder 131 in each single welding tape displacement assembly 130 is in a retracted state. At this time, the outer wall of the driving roller 121 is in contact with each welding tape roll 110. When the unwinding operation is required, the motor 122 in the driving mechanism 120 is controlled to start, and the motor 122 drives the driving roller 121 to rotate through the transmission belt 123. When the driving roller 121 rotates, it drives each welding tape roll 110 to rotate to unwind the welding tape 300. When the single welding tape unwinding sensing mechanism 200 detects that the welding tape 300 released by the corresponding welding tape roll 110 has reached a preset length, the single welding tape position sensor 200 corresponding to the welding tape roll 110 is controlled to rotate. The cylinder 131 in the shifting assembly 130 extends the cylinder rod to push the support platform 140 to rise, so that the support platform 140 supports the welding tape roll 110 to lift up and disengage from the driving roller 121 to stop rotating, and the remaining welding tape rolls 110 that have not been released to the preset length continue to release the material until each single welding tape unwinding sensing mechanism 200 detects that the welding tape 300 unwound by the corresponding welding tape roll 110 has reached the preset length, and the corresponding single welding tape displacement assembly 130 drives the support platform 140 to rise and support the welding tape roll 110 to lift up and disengage from the driving roller 121 to stop rotating. At this time, the motor 122 in the driving mechanism 120 is controlled to turn off, completing a welding tape unwinding operation.

[0078] As another embodiment, in step S20, a displacement sensor is used to detect whether the length of the ribbon unwound from any ribbon roll 110 has reached a preset length. Specifically, the displacement sensor senses the specific length of the ribbon unwound from each ribbon roll, and a preset length is set in advance. When the displacement sensor detects that the length of the ribbon unwound from any ribbon roll 110 has reached the preset length, the corresponding ribbon roll 110 is controlled to disengage from the drive roller 121 and stop unwound, while the other ribbon rolls 110 continue unwound. When each ribbon roll 110 has fully unwound the preset length of ribbon and disengaged from the drive roller 121 and stopped unwound, the motor 122 is controlled to stop operating, completing one unwound cycle. There are multiple displacement sensors, each corresponding to a ribbon roll 110.

[0079] As another embodiment, the step S10 may further include: S01, controlling the motor 122 to be inoperative, and pulling the soldering ribbon unwound from the plurality of soldering ribbon rolls 110 to a predetermined length along the unwinding direction via the pulling mechanism (the pulled soldering ribbon of the predetermined length may then be directly placed on the carrier substrate); while or after the soldering ribbon is being pulled, sending a signal to control the motor 122 to start operating; and repeating steps S01 to S30 to complete multiple unwinding operations. The pulling mechanism pulls out the predetermined length, and while the soldering ribbon roll 110 has been partially unwound, the process of cyclically executing steps S01 to S30 effectively pulls the already unwound soldering ribbon from the soldering ribbon roll 110 by the predetermined length, such that the length of the soldering ribbon placed on the carrier substrate is a fixed predetermined length each time. Unwinding by pulling and unwinding simultaneously avoids the technical problem of the soldering ribbons being entangled with each other during continuous unwinding, and also avoids the laborious and potentially damaging problem of pulling the soldering ribbon through the pulling mechanism. Secondly, the traction mechanism is used to accurately control the length of each placement on the carrier substrate to a preset length. This control method is more accurate and simple.

[0080] Furthermore, before the motor 122 starts operating in step S01, all of the multiple ribbon rolls 110 are controlled to contact the drive roller 121. That is, after the last unwinding of the ribbon roll 110, all of the ribbon rolls 110 are out of contact with the drive roller 121. To facilitate smooth unwinding of the next ribbon roll 110, before the next unwinding of the ribbon roll 110, that is, before the motor 122 starts operating again, all of the ribbon rolls 110 are restored to contact with the drive roller 121. Preferably, when all of the ribbon rolls 110 stopped unwinding last time, the motor 122 stops operating, and all of the ribbon rolls 110 are immediately restored to contact with the drive roller 121. In this way, one unwinding cycle can be considered to include restoring contact with the drive roller 121.

[0081] In addition, by cooperating with the sensors in the two specific embodiments below, the unwinding length of each welding ribbon roll 110 is the length pulled by the traction mechanism, making it easier to unwind multiple welding ribbon rolls of the same length at the same time.

[0082] As another example, Figure 2 As shown, the proximity sensor 240 cooperates with the slow impact wheel 230 to detect whether the length of the welding ribbon released by the corresponding welding ribbon roll 110 reaches the preset length. Specifically, in step S20, a plurality of single welding coil unwinding sensing mechanisms 200 corresponding to the welding ribbon roll 110 are used to detect whether the length of the welding ribbon released by the corresponding welding ribbon roll 110 reaches the preset length; further, the photovoltaic welding ribbon unwinding system of this embodiment also includes a controller. Among them, each single welding coil unwinding sensing mechanism 200 includes a guide rod 210 vertically connected to the support 100, a buffer seat 220 slidably mounted on the guide rod 210, a buffer wheel 230 connected to the buffer seat 220, a proximity sensor 240 located on the moving path of the buffer wheel 230 along the guide rod 210, and a first guide wheel group 161 and a second guide wheel group 162 arranged on the unwinding path of the corresponding welding ribbon roll 110 close to the welding ribbon roll 110. The welding ribbon released by the welding ribbon roll 110 passes through the first guide wheel group 161, the buffer wheel 230, The second guide wheel group 162 is sent out; the two ends of each guide rod 210 are respectively connected to the bottom and top of the support 100; the controller is electrically connected to each proximity sensor 240 and the motor 122, and the proximity sensor 240 is used to detect whether the buffer seat 220 is separated from or reaches the sensing area of ​​the proximity sensor 240 and transmits it to the controller. The controller is used to receive the signal transmitted by the corresponding proximity sensor 240 and control the cylinder 131 of each single welding roll displacement assembly 130 to drive the corresponding welding strip roll 110 to move or control the motor 122 of the driving device to open and close.

[0083] like Figure 5 As shown, before step S10, the following steps are also included:

[0084] Step S01: Motor 122 is controlled to be inoperative, and the traction mechanism is used to pull the soldering ribbons unwound from the five soldering ribbon reels 110 to a predetermined length along the unwinding direction. As the soldering ribbons are pulled, the corresponding buffer wheels 230 are simultaneously driven away from the sensing area of ​​the proximity sensor 240. The proximity sensor 240 sends a signal to the controller, which controls motor 122 to begin operating. The traction mechanism includes a clamping jaw 250 for gripping or releasing each soldering ribbon reel 110 to release the soldering ribbon, and a clamping jaw drive mechanism 260 for driving the clamping jaw 250 to reciprocate along the unwinding path.

[0085] S10 , the motor 122 drives the plurality of solder ribbon rolls 110 to rotate and release the solder ribbons simultaneously.

[0086] Then, S20, when any one of the proximity sensors 240 detects that the corresponding buffer wheel 230 returns to its sensing area again, the proximity sensor 240 transmits a signal (to the corresponding single welding roll displacement component 130) and controls the corresponding welding ribbon roll 110 to disengage from the contact driving roller 121 (through the corresponding single welding roll displacement component 130) so that the length of the welding ribbon released by the corresponding welding ribbon roll 110 is the preset length (that is, when it is detected that the corresponding buffer wheel 230 returns to its sensing area again, it is detected that the length of the released welding ribbon is the preset length), and the other welding ribbon rolls 110 continue to release the material.

[0087] S30. When all the welding ribbon rolls 110 have unwound all the welding ribbons of the preset length and have separated from the driving roller 121 to stop unwinding, the motor 122 is controlled to stop working, and all the welding ribbon rolls 110 are separated from the driving roller 121, completing one unwinding operation.

[0088] Then, steps S01 to S30 are repeated to complete multiple unwinding processes. Step S01 also includes cutting and placing the cut solder ribbon on a carrier substrate.

[0089] As another example, Figure 6 As shown, a tension sensor 180 detects changes in the surface tension of the soldering ribbon unwound from any soldering ribbon roll 110 to detect whether the length of the soldering ribbon unwound from the corresponding soldering ribbon roll 110 has reached a preset length. The tension sensor 180 is disposed on the unwinding path of the corresponding soldering ribbon roll 110. There are multiple tension sensors, each corresponding to one soldering ribbon roll 110. Specifically, each single-strip unwinding sensing mechanism 200 includes a tension sensor 180 disposed on the unwinding path of the corresponding soldering ribbon roll 110. The tension sensor 180 is used to sense the tension of the soldering ribbon 300.

[0090] Photovoltaic ribbon unwinding methods include:

[0091] S01, controlling the motor 122 to not work, and pulling the welding ribbons unwound from the plurality of welding ribbon reels 110 to the preset length along the unwinding direction through the traction mechanism; wherein, while or after the welding ribbons are being pulled, when the tension sensor 180 senses that the tension value of the unwound welding ribbon is greater than a preset range (the preset range is set according to the actual unwinding requirements and the welding ribbon tension), the tension sensor 180 sends a signal to control the motor 122 to start working;

[0092] S10, the motor 122 drives the multiple soldering ribbon reels 110 to rotate and release the soldering ribbons simultaneously;

[0093] S20. When any one of the tension sensors 180 detects that the tension value of the unwinding soldering ribbon is within the above-mentioned preset range, the tension sensor 180 sends a signal to (the corresponding single soldering ribbon displacement component 130) and controls (through the corresponding single soldering ribbon displacement component 130) the corresponding soldering ribbon roll 110 to stop rotating and unwinding, so that the length of the soldering ribbon unwound by the corresponding soldering ribbon roll 110 is the preset length, and the other soldering ribbon rolls continue to unwind.

[0094] S30, when each welding ribbon roll 110 has unwound all the welding ribbons of the preset length and has disengaged from the driving roller 121 and has stopped unwinding, the motor 122 is controlled to stop working, and one unwinding is completed.

[0095] Both of the above-described embodiments unwind while pulling, using a pulling mechanism to precisely control the length of the ribbon placed on the carrier substrate to a preset length each time. This control method is more precise and simple. Furthermore, through the coordination of the proximity sensor 240 and the tension sensor 180, the length of the unwound ribbon each time is the same as the length pulled out, thereby ensuring that the unwound lengths of multiple ribbon rolls 110 are the same, achieving a simple and precise implementation. Furthermore, when the proximity sensor 240 determines whether the unwound length has reached the preset length, it is sufficient to simply sense whether the buffer wheel 230 is within the sensing area of ​​the proximity sensor 240. When the tension sensor 180 determines whether the unwound length has reached the preset length, it is sufficient to simply determine whether the tension value of the unwound ribbon is within a preset range. Both control methods are also simpler.

[0096] Then, steps S01 to S30 are repeated to complete multiple unwinding processes. Step S01 also includes cutting and placing the cut solder ribbon on a carrier substrate.

[0097] As another embodiment, a starting reference position is set on the unwinding path of each soldering ribbon roll 110 and located after the single soldering ribbon unwinding sensing mechanism 200. This starting reference position serves as the starting position for the pulling mechanism to remove the soldering ribbon each time. By setting a fixed starting reference point, it is easier to control the pulling mechanism to accurately ensure that the soldering ribbon is pulled the same distance each time.

[0098] Step S01 further includes cutting the unwound solder ribbons from the plurality of solder ribbon rolls 110 at the starting reference position after the pulling mechanism has pulled the solder ribbons to a predetermined length from the starting reference position. This cutting action can cut the unwound solder ribbons into the desired length, allowing the desired length of solder ribbon to be unwound and placed on the carrier substrate as needed.

[0099] Furthermore, after the cutting is completed, the cut solder ribbon can be placed on the carrier substrate. The placement can be done by the above-mentioned traction mechanism, or other conventional transport mechanisms can be set up for placement.

[0100] As another embodiment, when the motor 122 drives the multiple soldering ribbon reels 110 to rotate and unwind the soldering ribbons simultaneously, a force is applied to the unwinding multiple soldering ribbons at a position before the starting reference on the unwinding path to fix them in place, thereby preventing the soldering ribbons from moving in the opposite direction of the unwinding direction due to the presence of the single soldering ribbon unwinding sensing mechanism 200;

[0101] Before the welding ribbons unwound from the plurality of welding ribbon rolls 110 are pulled out to the preset length along the unwinding direction by the traction mechanism, the acting force is released to facilitate the traction mechanism to take the welding ribbons again.

[0102] It should be noted that if the traction mechanism pulling the welding tape is used as the starting point of the action cycle, when the traction mechanism pulls out the preset length, the release status of each welding tape roll 110 may be different, that is, the height of the buffer wheel 230 is different. After the traction mechanism pulls the welding tape, the welding tape roll 110 will be unwound. Before the next time the welding tape is pulled, all buffer wheels 230 will return to the same starting position as before the previous pulling of the welding tape (all located in the sensing area of ​​the proximity sensor 240).

[0103] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A photovoltaic ribbon unwinding method, characterized in that: It includes the following steps: S10, using a motor to drive multiple soldering ribbon reels to rotate and release the soldering ribbons simultaneously; The motor drives a driving roller to rotate so as to drive the plurality of welding ribbon rolls in contact with the driving roller to rotate simultaneously; S20, when it is detected that the length of the welding ribbon unwound by any one of the welding ribbon rolls reaches a preset length, controlling the corresponding welding ribbon roll to disengage from the driving roller and stop unwounding the ribbon, while the other welding ribbon rolls continue unwounding the ribbon; S30. When each of the welding ribbon rolls has unwound all the welding ribbons of the preset length and has lost contact with the driving roller to stop unwinding, the motor is controlled to stop working, completing one unwinding operation.

2. The photovoltaic ribbon unwinding method according to claim 1, characterized in that: The controlling the corresponding welding ribbon roll to be out of contact with the driving roller includes: Applying an upward force to the corresponding welding ribbon roll from below; or, Applying an upward force to the corresponding welding ribbon roll from above; or, A lateral force is applied to the corresponding side of the welding ribbon roll.

3. The photovoltaic ribbon unwinding method according to claim 1, characterized in that: The driving roller is arranged on one side of the welding ribbon roll, and at least one idler wheel is arranged on the other side of the welding ribbon roll opposite to the driving roller. Multiple welding ribbon rolls are placed between the idler wheel and the driving roller, and the idler wheel and the driving roller cooperate to roll and support both sides of the welding ribbon roll.

4. The photovoltaic ribbon unwinding method according to claim 1, characterized in that: In step S20, a displacement sensor is used to detect whether the length of the soldering ribbon unwound from any one of the soldering ribbon rolls reaches a preset length.

5. The photovoltaic ribbon unwinding method according to claim 1, characterized in that: Before step S10, the following steps are also included: S01, pulling the welding ribbons unwound from the plurality of welding ribbon reels to a preset length along the unwinding direction by a traction mechanism, and sending a signal to control the motor to start working while or after the welding ribbons are being pulled; Repeat steps S01 to S30.

6. The photovoltaic ribbon unwinding method according to claim 5, characterized in that: Before executing step S01 of controlling the motor to start working, all of the plurality of welding ribbon rolls are controlled to contact the driving roller.

7. The photovoltaic ribbon unwinding method according to claim 5, characterized in that: In step S20, a plurality of single soldering roll unwinding sensing mechanisms corresponding to the soldering rolls are used to detect whether the length of the soldering ribbon unwound from the corresponding soldering rolls reaches a preset length; Each of the single welding coil unwinding sensing mechanisms includes a guide rod connected to a support and arranged in a vertical direction, a buffer seat slidably sleeved on the guide rod, a buffer wheel connected to the buffer seat, a proximity sensor located on the moving path of the buffer wheel along the guide rod, and a first guide wheel group and a second guide wheel group arranged on the unwinding path corresponding to the welding ribbon coil and close to the welding ribbon coil; the welding ribbon unwound from the welding ribbon coil passes through the first guide wheel group, the buffer wheel, and the second guide wheel group in sequence before being sent out; The photovoltaic ribbon unwinding method comprises: S01. The motor is controlled to be inoperative, and the welding ribbons unwound from the plurality of welding ribbon reels are pulled out to a preset length along the unwinding direction by a traction mechanism; wherein, while the welding ribbons are being pulled, the corresponding buffer wheels are driven to leave the sensing area of ​​the proximity sensor, and the proximity sensor sends a signal to control the motor to start operating; S10, the motor drives multiple welding ribbon rolls to rotate and release the welding ribbons simultaneously; S20, when any one of the proximity sensors detects that the corresponding buffer wheel returns to its sensing area again, the proximity sensor transmits a signal and controls the corresponding welding ribbon roll to disengage from the driving roller so that the welding ribbon length unwound by the corresponding welding ribbon roll is a preset length, and the other welding ribbon rolls continue to unwrap; S30. When each of the welding ribbon rolls has unwound all the welding ribbons of the preset length and has lost contact with the driving roller to stop unwinding, the motor is controlled to stop working, completing one unwinding operation.

8. The photovoltaic ribbon unwinding method according to claim 5, characterized in that: In step S20, a plurality of single soldering roll unwinding sensing mechanisms corresponding to the soldering rolls are used to detect whether the length of the soldering ribbon unwound from the corresponding soldering rolls reaches a preset length; Wherein, each of the single welding coil unwinding sensing mechanisms includes a tension sensor arranged on the unwinding path corresponding to the welding ribbon coil, and the tension sensor is used to sense the tension value of the welding ribbon; The photovoltaic ribbon unwinding method comprises: S01. Control the motor to not work, and pull the plurality of unwound welding ribbons of the welding ribbon reels out to the preset length along the unwinding direction through the traction mechanism; wherein, while or after the welding ribbons are being pulled, when the tension sensor senses that the tension value of the unwound welding ribbon is greater than a preset range, the tension sensor sends a signal to control the motor to start working; S10, the motor drives multiple welding ribbon rolls to rotate and release the welding ribbons simultaneously; S20, when any one of the tension sensors detects that the tension value of the unwinding welding ribbon is within the preset range, the tension sensor transmits a signal and controls the corresponding welding ribbon reel to stop rotating and unwinding so that the length of the welding ribbon unwound by the corresponding welding ribbon reel is the preset length, and the other welding ribbon reels continue unwinding; S30. When each of the welding ribbon rolls has unwound all the welding ribbons of the preset length and has lost contact with the driving roller to stop unwinding, the motor is controlled to stop working, completing one unwinding operation.

9. The photovoltaic ribbon unwinding method according to claim 5, characterized in that: A starting reference position is provided on the unwinding path of each of the welding ribbon rolls, and the starting reference position is used as the starting position of the traction mechanism each time the welding ribbon is taken; Step S01 includes, after pulling out the soldering ribbons unwound from the plurality of soldering ribbon reels to the preset length from the starting reference position by a pulling mechanism, cutting the soldering ribbons unwound from each of the soldering ribbon reels at the starting reference position.

10. The photovoltaic ribbon unwinding method according to claim 9, characterized in that: During the process of the motor driving the plurality of welding ribbon reels to rotate and unwind the welding ribbons simultaneously, a force is applied to the unwinding plurality of welding ribbons at a position before the starting reference on the unwinding path to fix them; Before the welding ribbons unwound from the plurality of welding ribbon rolls are pulled out to the preset length along the unwinding direction by the traction mechanism, the acting force is released.

Images