Photovoltaic module end wire folding method and device and photovoltaic module preparation device

Abstract

The invention discloses a photovoltaic module end part wire folding method and device and a photovoltaic module preparation device, and relates to the technical field of photovoltaic module production, the method comprises the following steps: a preset bending point on the surface of a welding strip extending out of the end part of a battery string is pressed, and a wire at one side of the preset bending point is a wire pre-bending part; the wire pre-bending part is driven to rotate along the bending point and is folded to the first surface of the battery piece, after the position where the welding strip is pressed in advance serves as the wire bending point, the wire pre-bending part is bent towards the upper portion of one side of the battery piece, and the wire pre-bending part rotates along the bending point and is folded to the first surface of the battery piece; the occupied area of the battery strings in the unit area of the photovoltaic module is reduced, and the power generation efficiency of the unit area of the photovoltaic module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic module production, and in particular to a method and device for folding a photovoltaic module end conductor and a photovoltaic module preparation device. Background Art

[0002] In the photovoltaic industry, to improve the power generation efficiency per unit area of ​​photovoltaic modules and reduce battery manufacturing costs, cell sizes have gradually increased. However, the busbars of conventional photovoltaic modules occupy more area on the light-receiving surface of the photovoltaic module, making the photovoltaic module larger and thicker, with an unsightly appearance, and consuming more materials and high costs. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a method and device for folding the end conductors of a photovoltaic module and a photovoltaic module manufacturing device.

[0004] In a first aspect, the present application provides a method for folding conductors at the ends of a photovoltaic module, wherein the photovoltaic module includes: a plurality of cell strings arranged in a matrix, and conductors extending from the ends of the cell strings, wherein the conductors include welding ribbons of a predetermined length and / or busbars connecting the ends of the plurality of welding ribbons; Pressing the surfaces of the plurality of welding strips extending from the end of the battery string, the pressing point serves as a preset bending point of the wire, and the wire on one side of the preset bending point serves as a pre-bent portion of the wire; The pre-bent portion of the wire is driven to rotate along a preset bending point and fold onto the first surface of the battery cell.

[0005] Furthermore, driving the pre-bending portion of the wire to rotate along the bending point and fold onto the first surface of the battery cell includes: after the pre-bending portion of the wire on one side of the bending point is pressed, it is bent upward at a preset angle, and then driving the pre-bending portion of the wire to rotate around the preset bending point and fold onto the first surface of the battery cell.

[0006] Furthermore, rotating the pre-bent portion of the wire along the bending point and folding it onto the first surface of the battery cell includes: Step a: while pressing the solder strip, driving the wire pre-bending portion to rotate toward the battery cell by a first angle with a preset bending point as the rotation center, Step b: releasing the soldering ribbon, driving the wire pre-bending portion to rotate in the same direction by a second angle, and folding the wire pre-bending portion onto the first surface of the battery cell.

[0007] Furthermore, the wire pre-bending portion is rotated in the same direction by a second angle while pressing the battery string outside the rotation range of the wire pre-bending portion.

[0008] Furthermore, before pressing the preset bending point of the surface of the welding strip extending out of the end of the battery string, it also includes: lifting the end of the battery string onto a supporting surface, the supporting surface includes a first supporting sub-surface for receiving the end of the battery string and a second supporting sub-surface for receiving the pre-bent portion of the wire, the first supporting sub-surface and the second supporting sub-surface are provided with a pre-bending angle, and the preset bending point is provided at the connection between the first supporting sub-surface and the second supporting sub-surface.

[0009] Furthermore, before driving the wire pre-bend portion to rotate along the bending point and fold to the first side of the battery cell, it also includes: translating the busbar as a whole along its length direction so that the welding strip of the wire pre-bend portion does not overlap with the welding strip connected to the battery cell.

[0010] Furthermore, a distance L between the bending point and an edge of a battery cell at an end of the battery string is ≤5 mm.

[0011] Furthermore, before driving the pre-bending portion of the wire to rotate along the bending point and fold onto the first surface of the battery cell, it also includes laying an insulating film strip on the edge of the first surface of the battery cell at the end of the battery string, and the width of the insulating film strip is not less than the width of the pre-bending portion of the wire.

[0012] In a second aspect, the present application further proposes a photovoltaic module end conductor folding device, comprising: A supporting platform, used for receiving at least the bottom of the end conductor of the battery string; A pressing mechanism is movably provided above the supporting platform and is used to press a preset bending point of a wire extending from an edge of a photovoltaic module end portion; The folding mechanism is used to drive the pre-bent portion of the wire on one side of the bending point to rotate along the bending point and fold onto the first surface of the battery cell.

[0013] Furthermore, it also includes an extraction device that is liftably arranged above the supporting platform, and the extraction device is used to lift the end of the photovoltaic component or battery string so that the pre-bent portion of the wire can be placed on the folding mechanism.

[0014] Furthermore, the supporting platform or the folding mechanism is provided with an upwardly inclined surface, and the inclined surface is used to receive the end of the battery string.

[0015] Furthermore, a die structure is provided on the supporting platform at the bending point, and the pressing member presses the welding strip into the groove of the die structure. The top of the groove is provided with a supporting portion extending toward the side of the battery cell, and the supporting portion supports the pre-bent portion of the bent wire to above the battery cell on the side of the preset bending point.

[0016] Furthermore, the folding mechanism includes a rotating driving member and a receiving member for receiving the pre-bent portion of the welding strip. The rotating driving member is rotatably connected to the receiving member via a rotating shaft, and the axis of the rotating shaft coincides with the preset bending point of the welding strip.

[0017] Furthermore, it includes a pad mechanism arranged on one side of the rotation point of the folding mechanism, and the pad mechanism and the folding mechanism are both connected to a mobile drive mechanism, and the mobile drive mechanism is used to move the pad mechanism and the folding mechanism to the bottom of the end of the battery string.

[0018] Furthermore, the pad mechanism is provided with a step surface at the preset bending point for receiving the end of the battery string, and the front edge of the pressing mechanism presses the welding strip placed at the intersection of the step surfaces, causing the pre-bent portion of the wire to warp upward at a preset angle.

[0019] Furthermore, a receiving cavity is provided on the supporting platform, and the receiving cavity is used to receive the receiving member so that the supporting surface of the receiving member is horizontal.

[0020] Furthermore, it also includes a clamping mechanism, which includes a translation drive component and a limiter, the driving end of the translation drive component is connected to the folding mechanism and the limiter, the limiter is used to fix the pre-bent portion of the wire placed on the folding mechanism on the folding mechanism, and the translation drive component simultaneously drives the limiter and the folding mechanism to translate as a whole along the length direction of the busbar.

[0021] Furthermore, the limiting member includes a bracket connected to the translation driving component, the driving cylinder fixedly connected to the bracket, and a rotating pressure rod pivotally connected to the bracket, the driving end of the driving cylinder is rotatably connected to the rotating pressure rod, and the driving cylinder drives the rotating pressure rod so that the lower end of the rotating pressure rod presses against or moves away from the pre-bent portion of the wire on the folding mechanism.

[0022] Furthermore, the pressing mechanism includes a first driving member, a second driving member and a pressing member, the pressing member is arranged on the driving end of the first driving member, and the pressing end of the pressing member is an acute-angle structure, the first driving member is arranged on the driving end of the second driving member, and the driving direction of the first driving member is perpendicular to the driving direction of the second driving member.

[0023] Furthermore, it also includes a movably positioned mechanism disposed above the photovoltaic assembly, and the positioning mechanism is used to fix the battery string.

[0024] In a third aspect, the present application further proposes a photovoltaic module manufacturing device, comprising any of the above-mentioned photovoltaic module end wire folding devices, wherein the folding device is used to rotate the pre-bent portion of the wire in the end of the photovoltaic module along the bending point and fold it onto the first surface of the solar cell, and further comprising: A jumper preparation mechanism, used for preparing jumpers for connecting ends of photovoltaic modules; A conveyor belt mechanism is used to carry the jumper wire to the photovoltaic module and overlap the two ends of the jumper wire with the pre-bent portion of the wire; The welding mechanism is used for heating and welding the end of the jumper wire and the overlapping portion of the pre-bent portion of the conductor at the end of the photovoltaic assembly.

[0025] The beneficial effects of the method for folding the end wire of a photovoltaic module proposed in the present invention are as follows: by pre-pressing the preset bending point of the welding strip extending from the edge of the battery cell at the end of the photovoltaic module, the welding strip and the busbar on one side of the bending point serve as the pre-bending part of the wire, and after pressing and fixing the bending point, the pre-bending part of the wire is driven to bend directly toward the upper part of the first side of the battery cell, and the pre-bending part of the wire rotates along the bending point and folds onto the first side of the battery cell, that is, folded onto the backlight side of the battery cell, thereby reducing the occupied area of ​​the battery string per unit area of ​​the photovoltaic module and improving the power generation efficiency per unit area of ​​the photovoltaic module. At the same time, the wire folding method is simple, and the position accuracy of the pre-bending part of the wire folded to the first side of the battery cell is precisely controlled by continuous driving when the pre-bending part of the wire rotates along the bending point. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A partial schematic diagram of the photovoltaic module proposed in this application; Figure 2 This is a schematic diagram of the manufacturing steps of the first photovoltaic module end conductor folding method proposed by the present invention; Figure 3 This is a schematic diagram of the manufacturing steps of the second photovoltaic module end conductor folding method proposed by the present invention; Figure 4 This is a schematic diagram of the manufacturing steps of the third photovoltaic module end conductor folding method proposed by the present invention; Figure 5 This is a schematic diagram of another photovoltaic module proposed by the present invention; Figure 6 This is a schematic structural diagram of the clamping mechanism proposed in the present invention; Figure 7 This is a schematic structural diagram of the pressing mechanism proposed in the present invention; Figure 8 This is a structural schematic diagram of the positioning mechanism proposed in the present invention.

[0028] Wherein, the accompanying drawings are marked as follows: 1. Pressing member; 101. First driving member; 102. Second driving member; 103. Pressing mechanism; 104. Extracting device; 10. Battery cell; 11. Wire; 111. Welding ribbon; 112. Busbar; 12. Insulating film strip; 2. Receiver; 20. Clamping mechanism; 21. Limiting member; 211. Bracket; 212. Driving cylinder; 213. Rotating pressure rod; 22. Translational driving member; 3. Carrying platform; 31. Accommodating cavity; 4. Die structure; 5. Positioning mechanism. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] like Figure 1 As shown, a photovoltaic module in the prior art is composed of several cell strings, with a partial length of welding ribbon 111 extending from the end of each cell string. The welding ribbon 111 extending from the cell 10 is connected in series or in parallel with other cell strings via a busbar 112. The busbar 112 at the end of the photovoltaic module and the welding ribbon 111 welded to the busbar 112 occupy part of the effective area of ​​the photovoltaic module, failing to maximize the effective area utilization of the photovoltaic module. Therefore, the busbar 112 provided at the end of the photovoltaic module within the light-receiving surface is partially folded over to the first side of the cell 10 at the end of the cell string, i.e., the back side of the cell 10. This not only improves the effective area utilization rate within the light-receiving surface of the photovoltaic module and increases the power generation efficiency per unit area, but also improves the aesthetics of the photovoltaic module by eliminating the busbar 112 on the front of the photovoltaic module.

[0033] The present invention proposes a method for folding the end conductor 11 of a photovoltaic module, such as Figure 2As shown, the photovoltaic module includes: a plurality of cell strings arranged in a matrix, and a conductor 11 extending from the end of the cell string, the conductor 11 including a welding ribbon 111 of a predetermined length and / or a busbar 112 connecting the ends of the plurality of welding ribbons 111; By simultaneously pressing the busbar 112 extending from the edge of the solar cell 10 of the end portion of the photovoltaic module and the surfaces of several welding strips 111 between the solar cells 10, the pressing point serves as a preset bending point for the wire 11 extending from the edge of the solar cell 10, and the welding strip 111 and busbar 112 on one side of the preset bending point serve as the pre-bent portion of the wire 11; Then, the pre-bending portion of the wire on one side of the preset bending point is driven to rotate along the bending point and folded onto the first surface of the battery cell 10. The first surface of the battery cell 10 with the folded pre-bending portion of the wire serves as the backlight surface of the photovoltaic module, and the side away from the first surface of the battery cell 10 and without the busbar 112 serves as the light-receiving surface of the battery cell 10, that is, the front surface of the photovoltaic module.

[0034] In some embodiments, driving the pre-bent portion of the wire 11 to rotate along the bending point and fold onto the first surface of the battery cell 10 also includes: after being pressed, the pre-bent portion of the wire 11 on the side of the bending point at the end of the photovoltaic module will bend upward to a preset angle, releasing the welding strip 111, and then driving the pre-bent portion of the wire 11 to rotate and fold onto the first surface of the battery cell 10 along the preset bending point.

[0035] It should be noted that the preset angle can be less than 90°, equal to 90°, or between 90° and 180°, so that the pre-bent portion of the wire 11 has a tendency to bend toward the first side of the battery cell 10. When the pre-bent portion of the wire 11 is driven to rotate toward the first side of the battery cell 10, there is no need to continuously press the bending point, and it is only necessary to drive the pre-bent portion of the wire 11 to rotate along the bending point.

[0036] In another embodiment, driving the pre-bent portion of the conductive wire 11 to rotate along the bending point and fold onto the first surface of the battery cell 10 further includes: Step a: While pressing the solder strip 111, the pre-bent portion of the wire 11 is driven to rotate toward the pressing side by a first angle with the preset bending point as the rotation center, and then step b is performed. Step b: releasing the solder ribbon 111 and driving the pre-bent portion of the wire 11 to rotate in the same direction by a second angle. The second angle of rotation directly folds the pre-bent portion of the wire 11 onto the first surface of the battery cell 10 .

[0037] By pressing and tightening the welding ribbon 111, the pre-bent portion of the wire 11 is pre-rotated to a first angle with the bending point as the rotation center. The first angle turns the pre-bent portion of the wire 11 to have a tendency to tilt toward one side of the battery cell 10, wherein the first angle gives the pre-bent portion of the wire 11 a predetermined bending direction. When the welding ribbon 111 is released and driven to rotate to the second angle, the pre-bent portion of the wire 11 can continue to rotate along the bending point as the rotation center.

[0038] Preferably, after releasing the welding ribbon 111, the pre-bent portion of the wire 11 is driven to rotate toward the first side of the battery cell 10, while pressing the battery string outside the rotation range of the pre-bent portion of the wire 11. After withdrawing the force pressing the bending point, press the surface of the battery string outside the rotation range of the pre-bent portion of the wire 11, and then drive the pre-bent portion of the wire 11 to rotate to the back side of the battery cell 10 to prevent the force driving the pre-bent portion of the wire 11 to rotate from pushing the battery string itself to move, so as to deviate from the target position in the photovoltaic module.

[0039] Furthermore, before pressing the bend point on the surface of the solder ribbon 111 extending from the edge of the cell 10, the end of the photovoltaic module or cell string is pre-placed on a support surface. The support surface includes a first support sub-surface for receiving the end of the cell string and a second support sub-surface for receiving the pre-bent portion of the conductor 11, wherein the first support sub-surface and the second support sub-surface are not coplanar. After pressing the preset bend point, the pre-bent portion of the conductor 11 is driven to rotate about the preset bend point, flipping the pre-bent portion of the conductor 11 to the top of the cell 10.

[0040] In some cases, the first bearing sub-surface and the second bearing sub-surface are not coplanar, which includes: the first bearing sub-surface and the second bearing sub-surface are at different heights, or the first bearing sub-surface and the second bearing sub-surface form an angle.

[0041] The bending process only requires one receiving member 2 to rotate and fold the pre-bent portion of the wire 11 and press it against the backlight side of the battery cell 10 , which simplifies the process and improves efficiency.

[0042] In addition, in some specific embodiments, lifting the end of the battery string onto the carrying surface includes: lifting the entire photovoltaic module or one end of the photovoltaic module that needs to be bent with the welding ribbon 111 and placing it on the carrying surface through other mechanisms, or lifting the entire photovoltaic module or one end of the photovoltaic module that needs to be bent with the welding ribbon 111 through other mechanisms, and after the carrying surface moves to the bottom of the pre-bent portion of the wire 11, releasing the photovoltaic module, and the pre-bent portion of the wire 11 is placed on the carrying surface to be bent later.

[0043] Preferably, the process of the folding method of the photovoltaic module end conductor 11 in the present application also includes, while the bearing surface is rotated toward the pressing side with the preset bending point as the rotation center, the busbar 112 is translated as a certain distance in its length direction as a whole, so that the pre-bent portion of the conductor 11 does not overlap with the welding ribbon 111 welded on the surface of the battery cell 10, and the pre-bent portion of the conductor 11 does not contact the welding ribbon 111 connected to the backlight surface of the battery cell 10, such as Figure 5As shown, the folded solder strip 111 and the solder strip 111 on the backlight side of the battery cell 10 are bent at a misaligned angle t at the bending point, and t is not greater than 90°. The folded solder strip 111 can be overlapped in the gap between the solder strips 111 on the backlight side of the battery cell 10, and does not exceed the gap between the two adjacent solder strips 111 on the surface of the battery cell 10. The solder strips 111 on the backlight side of the battery cell 10 are staggered, thereby reducing the overall thickness of the pre-bent portion of the bent wire 11 and the overlapping portion of the battery cell 10, and can prevent power attenuation and reduced component quality caused by bubbles generated by lamination vacuum due to the increased folding thickness of the solder strip 111. It can also reduce the amount of EVA film layer used for lamination of photovoltaic modules for filling, so as to reduce the manufacturing cost of photovoltaic modules.

[0044] In other embodiments, referring to Figure 5 As shown, the distance L between the bending point and the edge of the cell 10 at the end of the cell string is ≤ 5mm. In specific applications, this value can be 1mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, etc., and can be selected and set according to processing requirements. The portions of the several solder ribbons 111 extending from the edge of the cell 10 are bent and connected to the surface of the insulating film on the backlight side of the cell 10. After bending, the length of the solder ribbon 111 extending from the edge of the cell 10 is less than or equal to 5mm, thereby improving the utilization rate of the light-receiving surface of the photovoltaic module.

[0045] In addition, to prevent the first surface of the cell 10 and the pre-bent portion of the wire 11 from overlapping the welding ribbon 111 and the busbar 112 after folding, which would cause a short circuit in the cell 10, an insulating film strip 12 is sandwiched between the first surface of the cell 10 and the pre-bent portion of the wire 11 after bending. The width of the insulating film strip 12 is not less than the width of the pre-bent portion of the wire 11. Figure 5 As shown, before placing the pre-bent portion of the conductor 11 on the supporting surface of the receiving member 2, it also includes laying an insulating film strip 12 on the edge of the first surface of the cell 10 at the end of the photovoltaic module, and the pre-bent portion of the conductor 11 after being bent is overlapped on the insulating film on the first surface of the cell 10 to prevent the welding strip 111 and the busbar 112 of the pre-bent portion of the conductor 11 from overlapping and short-circuiting with the surface of the cell 10. The width h1 of the insulating film strip 12 is not less than the width h2 of the pre-bent portion of the conductor 11.

[0046] On the other hand, based on the above-mentioned folding method of the photovoltaic module end conductor 11, the present application also proposes a folding device for the photovoltaic module end conductor 11, comprising: The supporting platform 3 is used to receive at least the bottom of the end conductor 11 of the battery string; The pressing mechanism 103 is movably provided above the supporting platform 3 and is used to press the preset bending point of the welding ribbon 111 extending from the edge of the solar cell 10 at the end of the photovoltaic module; The folding mechanism is used to drive the pre-bent portion of the wire 11 on one side of the bending point to rotate along the bending point and fold onto the first surface of the battery cell 10.

[0047] When folding the end conductor 11 of the photovoltaic module, the photovoltaic module is first placed on the supporting platform 3 as a whole. Then, the pressing mechanism 103 moves to the upper part of the welding strip 111 between the edge of the battery cell 10 at the end of the photovoltaic module and the busbar 112, and presses the surface of the welding strip 111 between them as the preset bending point. The pre-bent portion of the wire 11 on one side of the pressed welding strip 111 is folded upward at a certain preset angle. After releasing the wire 11, the folding mechanism presses the folded pre-bent portion of the wire 11 placed on the supporting surface to the first surface of the battery cell 10 at the end of the photovoltaic module.

[0048] In some embodiments, the supporting surface on the supporting platform 3 or the folding mechanism for supporting the pre-bent portion of the conductor 11 is an upwardly inclined surface, and the supporting surface is an inclined surface inclined in the folding direction of the pre-bent portion of the conductor 11. An angle is provided between the preset inclined surface and the horizontal plane, and the inclined surface is inclined in the direction of the bending point of the welding strip 111, which can provide a tendency for the pressing member 1 to press the welding strip 111 and the bus strip 112 to bend toward the battery cell 10, so that after the pressing member 1 presses the welding strip 111, the preset upward bending angle of the pre-bent portion of the conductor 11 is more obvious, and when the supporting surface is bent toward the battery cell 10, the rotation angle and movement amplitude of the supporting surface and the pre-bent portion of the conductor 11 on the supporting surface are reduced to reduce the position change of the pre-bent portion of the conductor 11, and improve the stability of the supporting surface in bending the pre-bent portion of the conductor 11 and the accuracy of the bending position.

[0049] Specifically, the folding device of the end conductor 11 of the photovoltaic module also includes an extraction device 104 that can be raised and lowered above the supporting platform 3. The extraction device 104 is used to lift the photovoltaic module or the end of the photovoltaic module so that the pre-bent portion of the conductor 11 in the photovoltaic module can be placed on the supporting surface of the folding mechanism, and the pre-bent portion of the conductor 11 is driven to rotate to a preset angle along a preset bending point as a rotation point by relying on the folding mechanism.

[0050] As preferred, in another embodiment, Figure 4As shown, a die structure 4 is provided at the lower part of the welding strip 111 at the corresponding bending point. The die structure 4 includes a groove on the surface with an opening toward the side of the pressing member 1. The welding strip 111 is pressed into the groove of the die structure 4. The top of the groove is provided with a blocking portion extending toward the side of the battery cell 10. The blocking portion blocks the pre-bent portion of the bent wire 11 to above the battery cell 10 on the side of the preset bending point. The groove serves as the bearing point for the pressing member 1 to press the welding strip 111, and the pre-bent portions of the other wires 11 are placed on the other side of the groove. When the pressing member 1 presses the bending point of the welding strip 111 into the groove, the pre-bent portion of the wire 11 on the side of the bending point will bend toward the side of the battery cell 10 at a larger preset angle, so that the pre-bent portion of the wire 11 is restricted by the resisting portion at the top of the groove opening to within the preset pressing angle of the top of the groove opening. The preset pressing angle is that the pre-bent portion of the wire 11 is inclined toward the direction of the battery cell 10. Under the restriction of the top of the groove, the pre-bent portion of the wire 11 after pressing is subjected to the pressure of the pressing, and the pre-bent portion of the wire 11 is bent along the bending point above the battery cell 10.

[0051] Then, the pre-bent portion of the wire 11 located above the battery cell 10 is bent by the groove and leaves an angle with the battery cell 10. For the overall aesthetics of the photovoltaic module, the positioning mechanism 5 presses the pre-bent portion of the wire 11 with an angle with the battery cell 10 from the top to the upper part of the insulating film on the back of the battery cell 10 and keeps it flat.

[0052] Specifically, the folding mechanism includes a rotating driving member and a receiving member 2 for receiving the pre-bent part of the welding strip 111. The receiving member 2 is rotatably connected to the rotating driving member through a rotating shaft, wherein the axis of the rotating shaft coincides with the bending point. After the pressing mechanism 103 presses the preset bending point of the welding strip 111, the rotating driving member drives the receiving member 2 to rotate the pre-bent part of the wire 11 upward by a certain angle, and the pressing mechanism 103 is withdrawn from the rotation range of the folding mechanism. The rotating driving member then rotates the receiving member 2 to press the folded part of the pre-bent part of the wire 11 to the first side of the battery cell 10.

[0053] The receiving member 2 serves as a carrier for the pre-bent portion of the wire 11. The pre-bent portion of the wire 11 on the side of the bending point placed on the supporting surface is rotated with the bending point as the rotation center, and is pressed against the backlight surface of the battery cell 10 by the supporting surface. In some embodiments, referring to Figure 3 As shown, the bearing surface of the receiving member 2 can also be a horizontal plane, and the pre-bent portion of the wire 11 placed on the receiving member 2 is parallel to or overlaps with other parts of the photovoltaic module. The pre-bent portion of the wire 11 placed on the bearing surface of the horizontal plane is rotated 180 degrees and folded on the back of the battery cell 10.

[0054] In some embodiments, it includes a pad mechanism provided on one side of the rotation point of the bending mechanism, and the pad mechanism and the folding mechanism are both connected to the mobile drive mechanism. After the extraction device 104 lifts the end of the photovoltaic module from the supporting platform 3, the mobile drive mechanism moves the folding mechanism to the bottom of the welding ribbon 111 and the bus ribbon 112 extending from the part of the battery cell 10 on the bending point side of the lifted photovoltaic module, and at the same time, moves the pad mechanism to the photovoltaic module part on the other side of the bending point on the photovoltaic module and places it above the pad mechanism. After the extraction device 104 releases the end of the photovoltaic module, the welding ribbon 111 and the bus ribbon 112 to be bent are placed on the receiving part 2 of the folding mechanism and withdrawn from the rotation range of the receiving part 2. Subsequently, the pressing mechanism 103 presses the welding ribbon 111 at the bending point between the pad mechanism and the receiving part 2 of the folding mechanism.

[0055] In some embodiments, the pad mechanism is provided with a step surface at a preset bending point for receiving the front end of the photovoltaic module, and the front edge of the pressing mechanism 103 presses the welding strip 111 placed at the root of the step surface, so that the welding strip 111 and the busbar 112 to be bent are pressed by the pressing mechanism 103 to warp at a preset angle.

[0056] In some embodiments, as Figure 3 As shown, a receiving cavity 31 is provided on the supporting platform 3, and the receiving cavity 31 is used to receive the receiving member 2, so that the supporting surface of the receiving member 2 is horizontal. Specifically, the horizontal supporting surface can hide part or all of the volume of the receiving member 2 used to support the pre-bent portion of the wire 11 below the horizontal surface. The supporting surface of the receiving member 2 is placed flush with the horizontal surface, and the pre-bent portion of the wire 11 is placed on the horizontal supporting surface. The receiving member 2 is rotated 180 degrees to fold the pre-bent portion of the wire 11 to the backlight side of the battery cell 10, so that the pre-bent portion of the wire 11 is directly folded on the backlight side of the battery cell 10.

[0057] In addition, refer to Figure 6 As shown, the folding device for the end conductor 11 of the photovoltaic module further includes a clamping mechanism 20, which includes a translation drive component 22 and a limiter 21. The driving end of the translation drive component 22 is drivably connected to the folding mechanism and the limiter 21. The limiter 21 is used to fix the pre-bent portion of the conductor 11 placed on the folding mechanism to the folding mechanism. The translation drive component 22 simultaneously drives the limiter 21 and the folding mechanism to translate as a whole along the length direction of the busbar 112. The folding mechanism and the limiter 21 jointly fix the pre-bent portion of the conductor 11, and rely on the translation drive component 22 to translate the pre-bent portion of the conductor 11 along the length direction of the busbar 112, so that the soldering ribbon 111 in the pre-bent portion of the conductor 11 forms an angle with the soldering ribbon 111 on the surface of the cell 10, and is staggered with the soldering ribbon 111 on the surface of the cell 10.

[0058] Specifically, the limiting member 21 includes a bracket 211 connected to the translation driving component 22, a driving cylinder 212 fixedly connected to the bracket, and a rotating pressure rod 213 pivotally connected to the bracket. The driving end of the driving cylinder 212 is rotatably connected to the rotating pressure rod 213. The driving cylinder 212 drives the rotating pressure rod 213 to press the front end of the rotating pressure rod against or away from the pre-bent portion of the wire 11 on the bearing surface of the folding mechanism.

[0059] For specific plans, refer to Figure 7 As shown, the pressing mechanism 103 includes a first driving member 101, a second driving member 102, and a pressing member 1. The pressing member 1 is provided on the driving end of the first driving member 101, and the pressing end of the pressing member 1 has an acute angle structure. The first driving member 101 is provided on the driving end of the second driving member 102, and the driving direction of the first driving member 101 is perpendicular to the driving direction of the second driving member 102. The pressing member 1 with an acute angle structure can press against a smaller area of ​​the solder ribbon 111, so that more area of ​​the solder ribbon 111 is divided into the pre-bent portion of the wire 11, so that the solder ribbon 111 with a larger area extending from the end of the battery string is folded to the back of the battery cell 10, further improving the accuracy of the bending of the wire 11.

[0060] In some embodiments, reference Figure 8 As shown, the folding device of the photovoltaic module end conductor 11 also includes a movably arranged positioning mechanism 5 above the photovoltaic module, and the positioning mechanism 5 is used to fix the battery string outside the rotation range of the pre-bent portion of the conductor 11.

[0061] When the folding mechanism drives the wire 11 to bend and rotate, and the pressing mechanism 103 releases the welding ribbon 111, the pressing mechanism 103 presses the battery string at the pre-bent portion of the wire 11 to prevent the force driving the pre-bent portion of the wire 11 to rotate from pushing the battery string itself to move and deviate from the target position in the photovoltaic module.

[0062] On the other hand, based on the above photovoltaic module bending device, the present application also proposes a photovoltaic module preparation device. A jumper preparation mechanism, used for preparing jumpers for connecting ends of photovoltaic modules; The conveyor belt mechanism is used to carry the jumper prepared by the jumper preparation mechanism to the photovoltaic module, and overlap the two ends of the jumper with the pre-bent portion of the conductor 11; The welding mechanism is used to heat and weld the end of the jumper wire and the pre-bent portion of the conductor 11 at the end of the photovoltaic module to interconnect them.

[0063] The folding device rotates the pre-bent portion of the wire 11 along a preset bending point and folds it onto the first surface of the battery cell 10. The belt transport mechanism transports the jumper prepared by the jumper preparation device to the photovoltaic module, and stacks the end of the jumper on the surface of the busbar 112 of the pre-bent portion of the wire 11. The stacked jumper ends and the busbar 112 are heated and welded to each other through the welding mechanism.

[0064] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention, and any reference signs in the claims should not be construed as limiting the claims to which they relate.

[0065] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A method for folding the end conductors of a photovoltaic module, the photovoltaic module comprising: A plurality of battery strings arranged in a matrix, and a conductor (11) extending from the end of the battery string, wherein the conductor (11) comprises a welding strip (111) of a predetermined length and / or a busbar (112) connecting the ends of the plurality of welding strips (111); characterized in that: Pressing the surfaces of several welding strips (111) extending out of the end of the battery string, the pressing point serves as a preset bending point of the wire (11), and the wire on one side of the preset bending point serves as a pre-bent portion of the wire; The wire pre-bending portion is driven to rotate along a preset bending point and fold onto the first surface of the battery sheet (10).

2. The photovoltaic module end conductor folding method according to claim 1, characterized in that: Driving the wire pre-bend portion to rotate along the bending point and fold onto the first surface of the battery cell (10) comprises: after the wire pre-bend portion on one side of the bending point is pressed and bent upward at a preset angle, releasing the welding strip, and driving the wire pre-bend portion to rotate and fold onto the first surface of the battery cell (10) along the preset bending point.

3. The photovoltaic module end conductor folding method according to claim 1, characterized in that: Driving the pre-bent portion of the wire to rotate along the bending point and fold onto the first surface of the battery sheet (10) comprises: Step a: while pressing the welding strip (111), driving the wire pre-bending portion to rotate toward one side of the battery cell by a first angle with a preset bending point as the rotation center, Step b: releasing the welding ribbon, driving the pre-bent portion of the wire to rotate in the same direction by a second angle, and folding the pre-bent portion of the wire (11) onto the first surface of the battery cell (10).

4. The photovoltaic module end conductor folding method according to claim 2 or 3, characterized in that: After releasing the welding ribbon, the wire pre-bending portion is driven to rotate toward the first surface of the battery cell while pressing the battery string outside the rotation range of the wire pre-bending portion.

5. The photovoltaic module end conductor folding method according to claim 1, characterized in that: Before pressing the preset bending point on the surface of the welding strip extending out of the end of the battery string, the method also includes: lifting and placing the end of the battery string onto a supporting surface, the supporting surface includes a first supporting sub-surface for receiving the end of the battery string and a second supporting sub-surface for receiving the pre-bent portion of the wire, the first supporting sub-surface and the second supporting sub-surface are not coplanar, and the preset bending point is set at the connection between the first supporting sub-surface and the second supporting sub-surface.

6. The photovoltaic module end conductor folding method according to claim 1, characterized in that: Before driving the wire pre-bend portion to rotate along the bending point and fold to the first surface of the battery cell (10), the method further includes: translating the busbar as a whole along its length direction so that the welding strip (111) of the wire pre-bend portion does not overlap with the welding strip (111) connected to the battery cell (10).

7. The photovoltaic module end conductor folding method according to claim 1, characterized in that: The distance L between the bending point and the edge of the end battery sheet (10) of the battery string is ≤5 mm.

8. The photovoltaic module end conductor folding method according to claim 1, characterized in that: Before driving the wire pre-bend portion to rotate along the bending point and fold onto the first surface of the battery cell (10), the method further includes laying an insulating film strip (12) on the edge of the first surface of the battery cell (10) at the end of the battery string, wherein the width of the insulating film strip is not less than the width of the wire pre-bend portion.

9. A photovoltaic module end conductor folding device, characterized in that: The photovoltaic module end conductor folding method according to any one of claims 1 to 8 comprises: A supporting platform (3) is used to receive at least the bottom of the end conductor of the battery string; A pressing mechanism (103) is movably arranged above the supporting platform and is used to press a preset bending point of a welding strip (111) extending from an edge of a cell sheet at an end of a photovoltaic module; The folding mechanism is used to drive the pre-bent portion of the wire on one side of the bending point to rotate along the bending point and fold onto the first surface of the battery sheet (10).

10. The photovoltaic module end conductor folding device according to claim 9, characterized in that: The bearing surface on the bearing platform (3) or the folding mechanism for bearing the pre-bent portion of the conductor is an upwardly inclined surface.

11. The photovoltaic module end conductor folding device according to claim 9, characterized in that: It also includes an extraction device (104) that is escalably arranged above the carrier platform (3), and the extraction device (104) is used to lift the end of the photovoltaic module or battery string so that the pre-bent portion of the wire can be placed on the folding mechanism.

12. The photovoltaic module end conductor folding device according to claim 9, characterized in that: A die structure (4) is further provided on the support platform at the bending point, and the pressing member (1) of the pressing mechanism (103) presses the welding strip (111) into the groove of the die structure (4). A stop portion extending toward one side of the battery cell is provided at the top of the groove, and the stop portion stops the pre-bent portion of the bent wire to above the battery cell (10) on the side of the preset bending point.

13. The photovoltaic module end conductor folding device according to claim 9, characterized in that: The folding mechanism comprises a rotary drive member and a receiving member (2) for receiving the pre-bent portion of the welding strip; the rotary drive member is rotatably connected to the receiving member (2) via a rotating shaft, and the axis of the rotating shaft coincides with a preset bending point of the welding strip (111).

14. The photovoltaic module end conductor folding device according to claim 9, characterized in that: The supporting platform (3) comprises a pad mechanism arranged on one side of the rotation point of the folding mechanism, and the pad mechanism and the folding mechanism are both connected to a moving drive mechanism, and the moving drive mechanism is used to move the pad mechanism and the folding mechanism to below the end of the battery string.

15. The photovoltaic module end conductor folding device according to claim 14, characterized in that: The pad mechanism is provided with a step surface for receiving the end of the battery string at the preset bending point, and the front edge of the pressing mechanism presses the welding strip (111) placed at the intersection of the step surfaces, so that the pre-bent portion of the wire is warped upward at a preset angle.

16. The photovoltaic module end conductor folding device according to claim 13, characterized in that: The bearing platform (3) is provided with a receiving cavity (31), and the receiving cavity (31) is used to receive the receiving component (2) so that the bearing surface of the receiving component (2) is horizontal.

17. The photovoltaic module end conductor folding device according to claim 9, characterized in that: The invention also includes a clamping mechanism (20), wherein the clamping mechanism (20) includes a translation driving component (22) and a limiting component (21), wherein a driving end of the translation driving component (22) is connected to the folding mechanism and the limiting component (21), and the limiting component (21) is used to fix the pre-bent portion of the wire (11) placed on the folding mechanism on the folding mechanism, and the translation driving component simultaneously drives the limiting component and the folding mechanism to translate as a whole along the length direction of the busbar.

18. The photovoltaic module end conductor folding device according to claim 17, characterized in that: The limiting member (21) includes a bracket (211) connected to the translation driving component (22), a driving cylinder (212) fixedly connected to the bracket (211), and a rotating pressure rod (213) pivotally connected to the bracket (211), wherein the driving end of the driving cylinder (212) is rotatably connected to the rotating pressure rod (213), and the driving cylinder (212) drives the rotating pressure rod (213) so that the front end of the rotating pressure rod (213) presses against or moves away from the wire pre-bending portion on the folding mechanism.

19. The photovoltaic module end conductor folding device according to claim 9, characterized in that: The pressing mechanism (103) comprises a first driving member (101), a second driving member (102) and a pressing member (1); the pressing member (1) is arranged on the driving end of the first driving member (101), and the pressing end of the pressing member (1) is an acute-angle structure; the first driving member (101) is arranged on the driving end of the second driving member (102); and the driving direction of the first driving member (101) is perpendicular to the driving direction of the second driving member (102).

20. The photovoltaic module end conductor folding device according to claim 9, characterized in that: It also includes a movably positioned mechanism (5) disposed above the photovoltaic assembly, the positioning mechanism (5) being used to fix the battery string outside the rotation range of the conductor pre-bent portion.

21. A photovoltaic module manufacturing device, characterized in that: The photovoltaic module end conductor folding device comprises the photovoltaic module end conductor folding device according to any one of claims 9 to 20, wherein the folding device is used to rotate the pre-bent portion of the conductor in the photovoltaic module end conductor along the bending point and fold it onto the first surface of the solar cell (10), and further comprises: A jumper preparation mechanism, used for preparing jumpers for connecting ends of photovoltaic modules; A conveyor belt mechanism is used to carry the jumper wire to the photovoltaic module and overlap the two ends of the jumper wire with the pre-bent portion of the wire; The welding mechanism is used for heating and welding the end of the jumper wire and the overlapping portion of the pre-bent portion of the conductor at the end of the photovoltaic assembly.

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