Braze tape twisting mechanism and stringer

Abstract

The application relates to a welding strip torsion mechanism and a stringer. The welding strip is clamped by a clamping piece in the welding strip torsion mechanism, so that the welding strip is fixed; when the locking piece is in the unlocking position, the guide disc and the clamping piece can be driven to rotate synchronously when the power disc rotates, so that the welding strip is twisted by a preset angle, for example, one hundred and eighty degrees, so that the front surface of one of the two adjacent battery pieces and the back surface of the other battery piece are both in contact with the bottom surface of the welding strip. In this way, the two side surfaces of the welding strip can maximize the light reflection characteristics, thereby realizing more absorption of light and improving the overall photoelectric conversion efficiency of the photovoltaic module. Meanwhile, the contact area between the welding strip and the battery piece is increased, the contact resistance is reduced, the current transmission efficiency is improved, and the power output performance of the photovoltaic module is ensured.

Description

Technical Field

[0001] This application relates to the field of photovoltaic technology, and in particular to ribbon torsion mechanisms and string welding machines. Background Technology

[0002] With the increasing global demand for clean energy, solar photovoltaic power generation, as a sustainable and pollution-free energy source, has been widely adopted. Photovoltaic modules are the core components of a photovoltaic power generation system. They are mainly composed of multiple solar cells connected in a specific way to form a cell string, which is then assembled and packaged to form a complete module.

[0003] A stringer is a key piece of equipment used to weld solar cells and solder strips together to form a battery string.

[0004] In related technologies, when using a string welding machine to weld solar cells and welding strips, there is a problem of limited photoelectric conversion efficiency of the module. Utility Model Content

[0005] Therefore, it is necessary to provide a welding strip torsion mechanism and a welding machine to address the problem of limited photoelectric conversion efficiency when welding solar cells and welding strips using existing string welding machines.

[0006] A welding strip torsion mechanism includes a driving unit and a torsion unit connected to the driving unit; the torsion unit includes:

[0007] A power disk is connected to the drive unit and is driven to rotate by the drive unit. The power disk is constructed with a power groove. Along the extension direction of the power groove, the distance between the power groove and the central axis of the power disk gradually decreases.

[0008] The guide plate is configured with a groove; the groove extends radially along the power plate;

[0009] Multiple clamping members are distributed at intervals along the circumference of the power disk, and the multiple clamping members form a clamping space; a portion of the clamping members passes through the power groove and the sliding groove;

[0010] The locking accessory, when in the locked position, is connected to the guide plate to restrict the rotation of the guide plate. The power plate drives the clamping member to move along the slide groove through the power groove to clamp or release the welding strip. When the locking accessory is in the unlocked position, the locking accessory is disconnected from the guide plate. The power plate drives the guide plate and the clamping member to rotate synchronously to twist the welding strip.

[0011] In one embodiment, the drive unit includes a transmission component that is connected to the power disk and is used to drive the power disk to rotate.

[0012] In one embodiment, the power disk is constructed as a gear, and the transmission component is constructed as a rack.

[0013] In one embodiment, the welding strip torsion mechanism includes a plurality of torsion units, which are spaced apart along the extension direction of the rack.

[0014] The rack is connected to multiple torsion units in a driving manner.

[0015] In one embodiment, the clamping member includes a clamping block and a connecting block connected to the clamping block, the connecting block being connected to the power groove and the slide groove, and the clamping block being used to clamp the welding strip.

[0016] In one embodiment, the connecting block has a protrusion on the side facing the power disk, and the protrusion passes through the power groove and the slide groove in sequence.

[0017] In one embodiment, along the axial direction of the power disc, the welding strip torsion mechanism includes at least two spaced-apart torsion units.

[0018] In one embodiment, the welding strip torsion mechanism further includes a fixed base, to which the torsion unit is connected;

[0019] The welding strip torsion mechanism further includes a first guide member, and the fixed seat is slidably connected to the first guide member.

[0020] In one embodiment, one of the guide plate and the lock accessory is provided with a snap-fit ​​protrusion, and the other is provided with a snap-fit ​​groove for engaging with the snap-fit ​​protrusion.

[0021] And / or, the welding strip torsion mechanism further includes a second guide, the locking attachment being slidably connected to the second guide along the axial direction of the power disc to switch between the locked position and the unlocked position;

[0022] And / or, the power disk and the clamping member are located on opposite sides of the guide disk along the axial direction;

[0023] And / or, both the power disk and the guide disk are provided with clearance holes for avoiding the welding strip.

[0024] A string welding machine includes a welding strip torsion mechanism as described above.

[0025] The aforementioned ribbon torsion mechanism and string welding machine, taking a triangular ribbon cross-section as an example, use clamping components in the ribbon torsion mechanism to fix the ribbon. With the locking attachment in the unlocked position, the rotation of the power disc drives the guide disc and clamping components to rotate synchronously, thus torsion the ribbon by a preset angle, such as 180 degrees. This ensures that the front of one of two adjacent solar cells and the back of the other are in contact with the bottom surface of the ribbon. In this way, the two sides of the ribbon can maximize their reflective properties, thereby achieving greater light absorption and improving the overall photoelectric conversion efficiency of the photovoltaic module. Simultaneously, the increased contact area between the ribbon and the solar cell reduces contact resistance, which is beneficial for improving current transmission efficiency and ensuring the power output performance of the photovoltaic module. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments or exemplary embodiments of this application, the drawings used in the description of the embodiments or exemplary embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a welding strip torsion mechanism provided in an embodiment of this application.

[0028] Figure 2 for Figure 1 A schematic diagram of the welding strip torsion mechanism shown from another perspective.

[0029] Figure 3 for Figure 2 The diagram shows a partial exploded view of the welding strip torsion mechanism.

[0030] Figure 4 for Figure 1 The diagram shows a partial exploded view of the welding strip torsion mechanism.

[0031] Figure 5 for Figure 4 The diagram shown is a partial exploded view of the welding strip torsion mechanism from another perspective.

[0032] Figure 6 This is a schematic diagram of the welding process between the battery cell and the solder strip.

[0033] Figure 7 This is a schematic diagram of a welding strip twisting according to an embodiment of this application.

[0034] Reference numerals: 100, Drive unit; 110, Transmission component; 200, Torsion unit; 210, Power disc; 211, Power groove; 212, Clearance hole; 220, Guide disc; 221, Slide groove; 222, Snap-fit ​​groove; 230, Clamping component; 231, Clamping block; 232, Connecting block; 2321, Protrusion; 240, Locking accessory; 241, Snap-fit ​​protrusion; 250, Fixing base; 260, First guide component; 270, Second guide component; 300, Cutting unit; 1000, Welding strip; 2000, Battery cell. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] In the manufacturing process of photovoltaic modules, the stringing of solar cells is a crucial step, primarily involving connecting multiple cells in series using solder ribbons. To improve photoelectric conversion efficiency, solder ribbons have evolved from flat to round, and then to triangular ribbons, meaning the longitudinal section of the ribbon is triangular. Triangular solder ribbons, being triangular prisms, possess multiple reflective surfaces, enabling multiple reflections of light. Specifically, when light strikes the surface of the solar cell and the solder ribbon, the triangular solder ribbon reflects light that might otherwise be wasted back to the solar cell, increasing the cell's light absorption and thus contributing to improved photoelectric conversion efficiency.

[0042] Taking the example of two solar cells connected in series using a triangular welding ribbon, since half of the ribbon is welded to the front of one cell and the other half to the back, it's impossible to ensure that both the front and back of the cell are in contact with the bottom surface of the ribbon. This prevents the ribbon's reflective effect from being maximized. Related technologies typically segment the ribbon; for example, a triangular ribbon is used to connect to the front of the cell, while a flat or round ribbon is used to connect to the back. This requires segmented ribbon manufacturing, and the ribbon shape must perfectly align with the front and back of the cell during winding and stringing, increasing the complexity of the stringing operation. Furthermore, because the ribbon connecting to the back of the cell is round or flat, the reflective effect of the triangular ribbon cannot be fully utilized, resulting in limited photoelectric conversion efficiency.

[0043] Based on this, one embodiment of this application provides a solder strip torsion mechanism. By torsion of the solder strip, both the front and back sides of the solar cell are in contact with the bottom surface of the solder strip, allowing the two sides of the solder strip to exhibit reflective properties and improving photoelectric conversion efficiency. The solder strip torsion mechanism provided in one embodiment of this application will now be described in detail with reference to the accompanying drawings.

[0044] See Figure 1 and Figure 5As shown, an embodiment of this application provides a welding strip torsion mechanism, including a drive unit 100 and a torsion unit 200 connected to the drive unit 100; the torsion unit 200 includes a power disk 210, a guide disk 220, multiple clamping members 230, and a locking attachment 240: the power disk 210 is connected to the drive unit 100 and is driven to rotate by the drive unit 100; the power disk 210 is constructed with a power groove 211; along the extending direction of the power groove 211, the distance between the power groove 211 and the central axis of the power disk 210 gradually decreases; the guide disk 220 is constructed with a sliding groove 221; the sliding groove 221 extends radially along the power disk 210; the multiple clamping members 230... 30 are distributed circumferentially along the power plate 210, and multiple clamping members 230 form a clamping space; part of the clamping member 230 passes through the power groove 211 and the slide groove 221; when the locking accessory 240 is in the locked position, the locking accessory 240 is connected to the guide plate 220 to restrict the rotation of the guide plate 220, and the power plate 210 drives the clamping member 230 to move along the slide groove 221 through the power groove 211 to clamp or release the welding strip 1000; when the locking accessory 240 is in the unlocked position, the locking accessory 240 is disconnected from the guide plate 220, and the power plate 210 is used to drive the guide plate 220 and the clamping member 230 to rotate synchronously to twist the welding strip 1000. Since the distance between the power groove 211 and the central axis of the power disk 210 gradually decreases, when the power disk 210 rotates and the guide disk 220 is restricted from rotating by the locking attachment 240, the clamping member 230 will move in the power groove 211, that is, it will exhibit a movement trajectory of moving radially along the guide disk 220 in the slide groove 221.

[0045] Taking the welding strip 1000 with a triangular cross-section as an example, that is, the welding strip 1000 is a triangular welding strip 1000. Before welding the welding strip 1000 to the front and back of the battery cell 2000, the welding strip 1000 is clamped by the clamping member 230 in the welding strip torsion mechanism to fix the welding strip 1000. When the locking accessory 240 is in the unlocked position, the rotation of the power disk 210 can drive the guide disk 220 and the clamping member 230 to rotate synchronously, thereby causing the welding strip 1000 to rotate at a preset angle, such as 180 degrees, so that the front of one battery cell 2000 and the back of the other battery cell 2000 are in contact with the bottom surface of the welding strip 1000. For the welding strip 1000 connected to the front of the battery cell 2000, the cross-section of the welding strip 1000 is an upright triangle, and for the welding strip 1000 connected to the back of the battery cell 2000, the cross-section of the welding strip 1000 is an inverted triangle, such as... Figure 6 As shown, the two sides of the solder ribbon 1000 can maximize their reflective properties, thereby achieving greater light absorption and improving the overall photoelectric conversion efficiency of the photovoltaic module. Simultaneously, the increased contact area between the solder ribbon 1000 and the solar cell 2000 reduces contact resistance, which is beneficial for improving current transmission efficiency and ensuring the power output performance of the photovoltaic module.

[0046] See Figure 2 As shown, in some embodiments, the power groove 211 is a closed arc-shaped groove with both ends closed, thus limiting the movement range of the clamping member 230 and reducing the possibility of the clamping member 230 disengaging from the arc-shaped groove. In some embodiments, the power groove 211 extends through the power disk 210 axially, allowing a portion of the clamping member 230 to extend out of the power groove 211, increasing the contact area between the clamping member 230 and the power disk 210, and ensuring the reliability of the clamping member 230 sliding within the slide groove 221.

[0047] See Figure 5 As shown, in some embodiments, the groove 221 is an open groove with an opening, that is, the groove 221 is formed by recessing from the outer periphery of the guide disk 220, which is more convenient to process and easier to clean and maintain.

[0048] like Figure 5 As shown, in some embodiments, the number of power grooves 211 on the power disk 210 corresponds to the number of clamping members 230, and the number of sliding grooves 221 on the guide disk 220 corresponds to the number of clamping members 230. In some embodiments, multiple clamping members 230 are evenly distributed, and multiple sliding grooves 221 are evenly distributed circumferentially, resulting in a more balanced force distribution and improving the stability of the welding strip torsion mechanism. For example, in the embodiment shown in the figures, the number of clamping members 230, power grooves 211, and sliding grooves 221 are all three. It is understood that the number of clamping members 230, power grooves 211, and sliding grooves 221 is not limited to this, and can also be two, four, five, etc.

[0049] See Figure 1 and Figure 5 As shown, in one embodiment, the drive unit 100 includes a transmission component 110, which is connected to the power disk 210 and drives the power disk 210 to rotate. Understandably, the drive unit 100 also includes a power source, which drives the transmission component 110 to move, thereby transmitting power to the power disk 210, causing the power disk 210 to rotate around its own axis. By setting the transmission component 110, the transmission ratio can be controlled to adjust the torque required by the power disk 210, improving the flexibility of torque adjustment. Simultaneously, the output direction of the force can be changed, achieving a compact layout and ensuring transmission accuracy and rotational stability of the power disk 210. Of course, in other embodiments, a transmission component may not be provided, and the power disk may be directly driven to rotate by a power source such as a rotary motor.

[0050] See Figure 1 and Figure 5As shown, in one embodiment, the power disk 210 is constructed as a gear, and the transmission component 110 is constructed as a rack. Correspondingly, the power source for driving the rack can be a linear drive component, such as a linear motor. The rack can convert a small input force into a larger action force and act on the power disk 210, thereby driving the power disk 210 to rotate. By increasing the stroke length of the rack or changing the module of the gear and rack, the output torque can be changed. Through the linear movement of the rack, precise control of the gear rotation angle is ensured, thereby precisely controlling the torsional operation of the welding strip 1000.

[0051] In other embodiments, the transmission component 110 can also be a worm gear, and the power disk 210 can be a worm wheel. The helical teeth of the worm gear mesh with the teeth of the worm wheel. When the worm gear rotates, it drives the worm wheel to rotate through the pushing action of the helical teeth.

[0052] Since the solder ribbon 1000 is used to connect the main busbars of the solar cell 2000, for a multi-busbar solar cell 2000, there are correspondingly multiple solder ribbons 1000. (See also...) Figure 1 and Figure 2 As shown, in one embodiment, the welding strip torsion mechanism includes a plurality of torsion units 200, which are spaced apart along the extension direction of the rack, and the plurality of torsion units 200 arranged along the extension direction of the rack are arranged in a one-to-one correspondence with the welding strip 1000; the rack and the plurality of torsion units 200 are all connected in a driving manner.

[0053] Thus, when the rack moves linearly, multiple power discs 210 can rotate simultaneously, enabling the simultaneous clamping and twisting of multiple welding strips 1000, achieving batch twisting operations of the welding strips 1000 and improving processing efficiency. One rack can simultaneously drive multiple twisting units 200, allowing for precise synchronization among the multiple twisting units 200; and eliminating the need for separate power units for each twisting unit 200, reducing space requirements and simplifying synchronization control, thus lowering complexity and cost. Furthermore, the rack can evenly distribute force across multiple twisting units 200, avoiding localized force concentration and enhancing motion stability. For example, in… Figure 1 In the illustrated embodiment, there are ten solder strips 1000, and correspondingly, ten torsion units 200 are provided along the extension direction of the rack. In other embodiments, the number of torsion units 200 can be set according to the number of solder strips 1000 and the number of main grids, and is not limited thereto.

[0054] See Figure 4 and Figure 5 As shown, in one embodiment, along the axial direction of the power disc 210, the welding strip torsion mechanism includes at least two spaced-apart torsion units 200, each of which is used to clamp the welding strip 1000 at different positions. For example, in the attached... Figure 1 In the illustrated embodiment, three torsion units 200 are provided along the axial direction of the power disk 210. These torsion units 200 clamp the welding strip 1000 at different positions, allowing for torsion operations on corresponding areas of the welding strip 1000 according to actual needs. Simultaneously, since the torsion units 200 can clamp the welding strip 1000, multiple torsion units 200 can also function as grippers. For example, along the axial direction of the power disk 210, one torsion unit 200 can clamp and fix the welding strip 1000, while another torsion unit 200 can torsion the welding strip 1000, thus improving usability.

[0055] In other embodiments, additional clamping mechanisms, such as pneumatic grippers, may be provided to fix the welding strip 1000, and the torsion unit 200 is used to perform torsion operations on local areas of the welding strip 1000.

[0056] See Figure 1 As shown, in one embodiment, the welding strip torsion mechanism may further include a cutting unit 300, which cuts the unwound welding strip to the required welding length, and then the torsion unit 200 torsion a portion or half of the welding strip.

[0057] See Figure 4 and Figure 5 As shown, in one embodiment, the welding strip torsion mechanism further includes a fixed base 250, to which the torsion unit 200 is connected; the fixed base 250 is configured to be operably movable along the axial direction of the power disk 210. By moving the fixed base 250 along the axial direction of the power disk 210, the position of the torsion unit 200 can be adjusted, thereby enabling torsion operations on welding strips 1000 of different lengths or different areas of the welding strip 1000, improving the adaptability of the torsion operation. The power disk 210 is rotatably connected to the fixed base 250, ensuring the rotational freedom of the power disk 210. In some embodiments, a rotating component, such as a bearing, can be connected between the power disk 210 and the fixed base 250 to reduce rotational noise and improve rotational smoothness.

[0058] See Figure 4 and Figure 5 As shown, in some embodiments, the welding strip torsion mechanism further includes a first guide member 260, and a fixed seat 250 is slidably connected to the first guide member 260. The first guide member 260 guides and limits the movement of the fixed seat 250, improving the reliability of its linear movement. In some embodiments, the first guide member 260 may include a guide rail, on which a slider is slidably connected. The slider is connected to the fixed seat 250 to move linearly synchronously with the slider. For example, in the attached... Figure 2In the illustrated embodiment, one of the slider and the fixed base 250 is provided with a mating protrusion, and the other is provided with a mating groove for engaging with the mating protrusion. Synchronous movement of the slider and the fixed base 250 is achieved through the snap-fit ​​engagement of the mating protrusion and the mating groove. In some embodiments, the slider may have a mating protrusion and the fixed base 250 may have a mating groove. In other embodiments, the slider may have a mating groove and the fixed base 250 may have a mating protrusion. In some embodiments, the first guide member 260 may be a linear guide module, and its internal transmission mechanism is used to drive the slider to perform linear motion. The transmission mechanism may be a ball screw drive, a synchronous belt drive, a rack and pinion drive, etc.

[0059] See Figures 3 to 5 As shown, in one embodiment, one of the guide plate 220 and the locking accessory 240 is provided with a snap-fit ​​protrusion 241, and the other is provided with a snap-fit ​​groove 222 for engaging with the snap-fit ​​protrusion 241. For example, in the embodiment shown in the figure, the guide plate 220 is provided with a snap-fit ​​groove 222, and the locking accessory 240 is provided with a snap-fit ​​protrusion 241, wherein the snap-fit ​​groove 222 and the sliding groove 221 are spaced apart circumferentially along the guide plate 220. Of course, in other embodiments, the positions of the snap-fit ​​protrusion 241 and the snap-fit ​​groove 222 can be interchanged, that is, the guide plate 220 is provided with a snap-fit ​​protrusion 241, and the locking accessory 240 is provided with a snap-fit ​​groove 222. By connecting the snap-fit ​​protrusion 241 and the snap-fit ​​groove 222, the contact area between the guide plate 220 and the locking accessory 240 is increased, the limiting effect of the locking accessory 240 on the guide plate 220 is improved, and the rotation of the power plate 210 is converted into the linear movement of the clamping member 230. By disengaging the snap-fit ​​protrusion 241 from the snap-fit ​​groove 222, the rotation restriction on the guide disk 220 is released, allowing the power disk 210 to drive the guide disk 220 and the clamping member 230 to rotate synchronously.

[0060] See Figures 3 to 5As shown, in one embodiment, the welding strip torsion mechanism further includes a second guide 270, and the locking attachment 240 is slidably connected to the second guide 270 along the axial direction of the power disk 210 to switch between a locked position and an unlocked position. Taking an example where a locking groove 222 is provided on the guide disk 220 and a locking protrusion 241 is provided on the locking attachment 240, the locking groove 222 can be an open groove. When the locking attachment 240 moves to the point where the locking protrusion 241 and the locking groove 222 are radially aligned along the guide disk 220, that is, the locking protrusion 241 extends into the locking groove 222, the locking attachment 240 restricts the rotation of the guide disk 220. When the locking attachment 240 moves axially to the point where the locking protrusion 241 is misaligned with the locking groove 222, that is, the locking protrusion 241 is located outside the locking groove 222, for example, the locking protrusion 241 is located on one side of the locking groove 222 along the axial direction of the guide disk 220, the rotation of the guide disk 220 is unrestricted. The specific structure of the second guide member 270 can be referred to the first guide member 260 described above, and will not be repeated here. In some embodiments, the locking attachment 240 can be inclined, and multiple locking slots 222 can be provided on the guide plate 220. The locking attachment 240 is used to engage with one of the locking slots 222. For example, in the embodiment shown in the figure, there are two locking slots 222, so that after the power plate 210 drives the guide plate 220 to rotate 180 degrees, the locking attachment 240 can still engage with the other locking slot 222, realizing the release operation of the welding strip 1000.

[0061] In other embodiments, the locking groove 222 can also be a closed groove. Taking the locking accessory 240 with a locking protrusion 241 and the guide disk 220 with a closed locking groove 222 as an example, when the locking protrusion 241 passes through the locking groove 222 axially, it restricts the rotation of the guide disk 220. When there is a gap between the locking protrusion 241 and the locking groove 222 axially along the guide disk 220, the rotation of the guide disk 220 is not restricted.

[0062] In other embodiments, the locking attachment 240 may also move radially along the guide disk 220, and correspondingly, the locking attachment 240 may be connected to the telescopic drive member. When the telescopic drive member extends radially along the guide disk 220 and in a direction close to the central axis of the guide disk 220, the locking attachment 240 extends accordingly to engage with the guide disk 220. When the telescopic drive member retracts radially along the guide disk 220 and in a direction away from the central axis of the guide disk 220, the locking attachment 240 is disengaged from the guide disk 220.

[0063] See Figure 4 and Figure 5As shown, in one embodiment, the clamping member 230 includes a clamping block 231 and a connecting block 232 connected to the clamping block 231. The connecting block 232 is connected to the power groove 211 and the slide groove 221. The clamping block 231 is used to clamp the welding strip 1000. By setting a split clamping member 230, the manufacturing difficulty of the clamping member 230 can be simplified, enabling it to both transmit power and clamp the welding strip 1000. Moreover, stress concentration can be avoided, the service life of the clamping member 230 can be extended, and the later maintenance and replacement costs can be reduced. In some embodiments, both the connecting block 232 and the clamping block 231 are provided with connecting holes. Fasteners such as bolts pass through the connecting holes on the connecting block 232 and the clamping block 231, thereby connecting the two into one unit, so that when the connecting block 232 moves along the slide groove 221, the clamping block 231 can move synchronously.

[0064] See Figure 5 As shown, in one embodiment, the connecting block 232 has a protrusion 2321 on the side facing the power disk 210, and the protrusion 2321 passes through the power groove 211 and the slide groove 221 in sequence. The protrusion 2321 connects to the power groove 211 and the slide groove 221, so that the movement of the protrusion 2321 within the power groove 211 is converted into the movement of the protrusion 2321 along the slide groove 221. The protrusion 2321 can be a protruding post, and the outer diameter of the protruding post can be adapted to the groove width of the power groove 211, improving the stability of power transmission. In some embodiments, the connecting block 232 and the guide disk 220 are both located on the same side of the power disk 210. In other embodiments, the clamping member 230 and the guide disk 220 can be located on opposite sides of the power disk 210. In other embodiments, the clamping member 230 may also be disposed between the power disk 210 and the guide disk 220. In this case, the clamping member 230 is provided with a through protrusion 2321, and the two ends of the protrusion 2321 are respectively engaged with the power groove 211 and the slide groove 221.

[0065] See Figures 3 to 5 As shown, in one embodiment, both the power disk 210 and the guide disk 220 are configured with clearance holes 212 for avoiding the welding strip 1000, so that the welding strip 1000 can pass through multiple torsion units 200 in sequence.

[0066] See Figure 1 and Figure 7 As shown, in one embodiment, the twisting process of the 1000 welding strips is further illustrated:

[0067] The welding strip torsion mechanism moves to the left side of the diagram and then clamps the welding strip 1000.

[0068] The welding strip torsion mechanism moves to the right to pull out welding strip 1000;

[0069] At least one welding strip torsion mechanism continues to move to the right, so that multiple welding strip torsion mechanisms can be clamped at different positions of the welding strip 1000;

[0070] External clamping mechanisms, such as grippers, clamp the right side of the welding strip 1000 and pull it out;

[0071] The left gripper clamps the welding strip 1000, and together with the cutting unit 300, cuts the welding strip 1000.

[0072] After the clamping member 230 in the welding strip twisting mechanism fully clamps the welding strip 1000, the locking accessory 240 moves to the unlocked position; the power plate 210 drives the clamping member 230 to rotate synchronously, thereby performing a twisting operation on the welding strip 1000 until half of the welding strip 1000 is twisted 180 degrees.

[0073] After the twist is completed, the lock attachment 240 moves to the locked position, and the power plate 210 drives the clamping part 230 to move linearly to release the welding strip 1000.

[0074] After it is fully released, the right jaw pulls away 1000 mm of the welding strip;

[0075] The welding strip torsion mechanism returns to its initial position;

[0076] Once the left gripper releases the welding strip by 1000, the aforementioned twisting operation can be repeated using the welding strip twisting mechanism.

[0077] Furthermore, one embodiment of this application also provides a string welding machine, including the above-described ribbon torsion mechanism. Before welding the solar cells 2000 and the ribbon 1000, the string welding machine uses the ribbon torsion mechanism to twist the ribbon 1000 by a preset angle, for example, 180 degrees, so that in two adjacent solar cells 2000, the front side of one solar cell 2000 and the back side of the other solar cell 2000 are in contact with the bottom surface of the ribbon 1000. In this way, the two sides of the ribbon 1000 can maximize their reflective properties, thereby achieving greater light absorption and improving the overall photoelectric conversion efficiency of the photovoltaic module. At the same time, the increased contact area between the ribbon 1000 and the solar cells 2000 reduces contact resistance, which is beneficial to improving current transmission efficiency and ensuring the power output performance of the photovoltaic module.

[0078] Understandably, the stringer includes a welding mechanism for performing welding operations between the solar cell 2000 and the solder strip 1000. In one embodiment, the welding mechanism includes a welding head and a pressure application unit. The welding head can use infrared heating, laser heating, or other methods to precisely heat the contact area between the main grid lines of the solar cell 2000 and the solder strip 1000 according to different welding process requirements, melting the solder and other welding materials to achieve a firm connection between the two. During the welding process, in conjunction with the heating operation of the welding head, the pressure application unit applies appropriate pressure to the solar cell 2000 and the solder strip 1000, ensuring they fit tightly together, guaranteeing the strength of the weld and good solder filling, and preventing poor welding conditions such as cold solder joints.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A welding strip torsion mechanism, characterized in that, It includes a drive unit (100) and a torsion unit (200) connected to the drive unit (100); the torsion unit (200) includes: A power disk (210) is connected to the drive unit (100) and is driven to rotate by the drive unit (100). The power disk (210) is constructed with a power groove (211). Along the extension direction of the power groove (211), the distance between the power groove (211) and the central axis of the power disk (210) gradually decreases. The guide plate (220) is configured with a groove (221); the groove (221) extends radially along the power plate (210); Multiple clamping members (230) are distributed at intervals along the circumference of the power disk (210), and the multiple clamping members (230) form a clamping space; a portion of the clamping member (230) passes through the power groove (211) and the slide groove (221). When the locking attachment (240) is in the locked position, it is connected to the guide plate (220) to restrict the rotation of the guide plate (220). The power plate (210) drives the clamping member (230) to move along the slide groove (221) through the power groove (211) to clamp or release the welding strip (1000). When the locking attachment (240) is in the unlocked position, it is disconnected from the guide plate (220). The power plate (210) drives the guide plate (220) and the clamping member (230) to rotate synchronously to twist the welding strip (1000).

2. The welding strip torsion mechanism according to claim 1, characterized in that, The drive unit (100) includes a transmission component (110), which is connected to the power disk (210) for driving the power disk (210) to rotate.

3. The welding strip torsion mechanism according to claim 2, characterized in that, The power disc (210) is constructed as a gear, and the transmission component (110) is constructed as a rack.

4. The welding strip torsion mechanism according to claim 3, characterized in that, The welding strip torsion mechanism includes a plurality of torsion units (200), which are spaced apart along the extension direction of the rack. The rack is connected to multiple torsion units (200) in a driving manner.

5. The welding strip torsion mechanism according to any one of claims 1 to 4, characterized in that, The clamping member (230) includes a clamping block (231) and a connecting block (232) connected to the clamping block (231). The connecting block (232) is connected to the power groove (211) and the slide groove (221). The clamping block (231) is used to clamp the welding strip (1000).

6. The welding strip torsion mechanism according to claim 5, characterized in that, The connecting block (232) has a protrusion (2321) on the side facing the power disk (210), and the protrusion (2321) passes through the power groove (211) and the slide groove (221) in sequence.

7. The welding strip torsion mechanism according to any one of claims 1 to 4, characterized in that, Along the axial direction of the power disc (210), the welding strip torsion mechanism includes at least two spaced-apart torsion units (200).

8. The welding strip torsion mechanism according to claim 7, characterized in that, The welding strip torsion mechanism also includes a fixed base (250), and the torsion unit (200) is connected to the fixed base (250). The welding strip torsion mechanism further includes a first guide member (260), and the fixed seat (250) is slidably connected to the first guide member (260).

9. The welding strip torsion mechanism according to any one of claims 1 to 4, characterized in that, One of the guide plate (220) and the lock accessory (240) is provided with a snap-fit ​​protrusion (241), and the other is provided with a snap-fit ​​groove (222) for engaging with the snap-fit ​​protrusion (241). And / or, the welding strip torsion mechanism further includes a second guide (270), the locking attachment (240) being slidably connected to the second guide (270) along the axial direction of the power disc (210) to switch between the locked position and the unlocked position; And / or, the power disk (210) and the clamping member (230) are located on opposite sides of the guide disk (220); And / or, both the power disk (210) and the guide disk (220) are provided with clearance holes (212) for avoiding the welding strip (1000).

10. A string welding machine, characterized in that, Includes the welding strip torsion mechanism as described in any one of claims 1 to 9.

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