Photovoltaic module end conductor folding method, apparatus and photovoltaic module preparation apparatus

Abstract

The application discloses a photovoltaic module end wire folding method and device and a photovoltaic module preparation device, relates to the technical field of photovoltaic module production, and comprises the following steps: pressing a preset bending point of a surface of a solder strip extending out of an end of a battery string, and a wire on one side of the preset bending point is a wire pre-bending part; driving the wire pre-bending part to rotate along the bending point and fold onto a first surface of a battery piece, and after the position of the solder strip is pressed in advance as the wire bending point, the wire pre-bending part is further bent towards the upper part of the side of the battery piece, the wire pre-bending part rotates along the bending point and folds onto the first surface of the battery piece, the occupied area of the battery string in a unit area of the photovoltaic module is reduced, and the power generation efficiency of a unit surface of the photovoltaic module is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic module manufacturing technology, and in particular to a method, apparatus, and photovoltaic module fabrication device for folding end conductors of a photovoltaic module. Background Technology

[0002] In the photovoltaic industry, in order to improve the power generation efficiency per unit area of ​​photovoltaic modules and reduce the manufacturing cost of cells, the size of solar cells has gradually increased. However, the busbar of conventional photovoltaic modules occupies a large area of ​​the photovoltaic module's light-receiving surface, making the photovoltaic modules large, thick, and aesthetically unappealing, while also consuming more materials and resulting in higher costs. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides a method, apparatus, and photovoltaic module fabrication apparatus for folding end conductors of photovoltaic modules.

[0004] In a first aspect, this application provides a method for folding the end wires of a photovoltaic module. The photovoltaic module includes: a plurality of matrix-arranged battery strings, and wires extending from the ends of the battery strings. The wires include solder strips of a predetermined length and / or busbars connecting the ends of a plurality of solder strips.

[0005] The surface of several welding strips extending from the end of the battery string is pressed against the surface. The pressing point serves as the preset bending point of the conductor, and the conductor on one side of the preset bending point is the pre-bent part of the conductor.

[0006] The pre-bent portion of the driving wire is rotated along a preset bending point and folded onto the first surface of the battery cell.

[0007] Furthermore, driving the wire pre-bending portion to rotate along the bending point and fold onto the first surface of the battery cell includes: after the wire pre-bending portion on the side of the bending point after being pressed is bent upward at a preset angle, driving the wire pre-bending portion to rotate and fold around the preset bending point onto the first surface of the battery cell.

[0008] Furthermore, rotating and folding the pre-bent portion of the conductor along the bending point onto the first surface of the battery cell includes:

[0009] Step a: While pressing down on the welding strip, drive the pre-bent part of the wire to rotate a first angle towards the side of the battery cell with the preset bending point as the rotation center.

[0010] Step b: Release the solder strip, drive the wire pre-bent part to rotate in the same direction at a second angle, and fold the wire pre-bent part onto the first surface of the battery cell.

[0011] Furthermore, while the pre-bent portion of the conductor rotates a second angle in the same direction, the battery string outside the rotation range of the pre-bent portion of the conductor is pressed.

[0012] Furthermore, before pressing the pre-set bending point on the surface of the solder strip extending from the end of the battery string, the process further includes: lifting the end of the battery string onto a bearing surface, the bearing surface including a first bearing sub-surface for receiving the end of the battery string and a second bearing sub-surface for receiving the pre-bent portion of the conductor, the first bearing sub-surface and the second bearing sub-surface having a pre-bending angle, and the pre-set bending point being located at the connection between the first bearing sub-surface and the second bearing sub-surface.

[0013] Furthermore, before driving the pre-bent portion of the conductor to rotate along the bending point and fold to the first side of the battery cell, the process further includes: translating the busbar as a whole along its length direction so that the solder strip of the pre-bent portion of the conductor does not overlap with the solder strip connected to the battery cell.

[0014] Furthermore, the distance L between the bending point and the edge of the end cell of the battery string is ≤5mm.

[0015] Furthermore, before driving the pre-bent portion of the conductor to rotate along the bending point and fold onto the first surface of the battery cell, an insulating film strip is laid on the edge of the first surface of the battery cell at the end of the battery string, the width of the insulating film strip being not less than the width of the pre-bent portion of the conductor.

[0016] Secondly, this application also proposes a photovoltaic module end wire folding device, comprising:

[0017] A support platform for at least receiving the bottom of the end wires of the battery string;

[0018] The pressing mechanism is movably disposed above the support platform and is used to press the preset bending point of the wire extending from the edge of the cell at the end of the photovoltaic module.

[0019] A 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.

[0020] Furthermore, it also includes an extraction device that can be lifted and lowered above the support platform. The extraction device is used to lift the end of the photovoltaic module or battery string so that the pre-bent part of the wire can be placed on the folding mechanism.

[0021] Furthermore, the support platform or the folding mechanism is provided with an upwardly inclined surface, which is used to receive the end of the battery string.

[0022] Furthermore, the bearing platform at the bending point is also provided with a concave mold structure, and the pressing member presses the welding strip into the groove of the concave mold structure. The top of the groove is provided with a blocking part extending towards the side of the battery cell. The blocking part blocks the pre-bent part of the bent wire to the top of the battery cell on the side of the preset bending point.

[0023] Furthermore, the folding mechanism includes a rotary drive and a receiving component for receiving the pre-bent portion of the welding strip. The rotary drive is rotatably connected to the receiving component via a rotating shaft, and the axis of the rotating shaft coincides with the preset bending point of the welding strip.

[0024] Furthermore, it includes a pad mechanism located on one side of the rotation point of the folding mechanism. Both the pad mechanism and the folding mechanism are connected to a moving drive mechanism, which is used to move the pad mechanism and the folding mechanism to below the end of the battery string.

[0025] Furthermore, the pad mechanism has a stepped 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 stepped surface, causing the pre-bent part of the conductor to bend upward at a preset angle.

[0026] Furthermore, the support platform is provided with a receiving cavity, which is used to receive the receiving component, so that the bearing surface of the receiving component is horizontal.

[0027] Furthermore, it also includes a clamping mechanism, which includes a translational drive component and a limiting component. The drive end of the translational drive component is connected to the folding mechanism and the limiting component. The limiting component is used to fix the pre-bent portion of the wire placed on the folding mechanism onto the folding mechanism. The translational drive component simultaneously drives the limiting component and the folding mechanism to translate as a whole along the length direction of the busbar.

[0028] Furthermore, the limiting member includes a bracket connected to the translation drive component, a drive cylinder fixedly connected to the bracket, and a rotating pressure rod pivotally connected to the bracket. The drive end of the drive cylinder is rotatably connected to the rotating pressure rod, and the drive cylinder drives the rotating pressure rod to press against or move away from the wire pre-bent portion on the folding mechanism.

[0029] Furthermore, the pressing mechanism includes a first driving member, a second driving member, and a pressing member. The pressing member is disposed on the driving end of the first driving member, and the pressing end of the pressing member has an acute angle structure. The first driving member is disposed 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.

[0030] Furthermore, it also includes a movable positioning mechanism disposed above the photovoltaic module, the positioning mechanism being used to fix the battery string.

[0031] Thirdly, this application also proposes a photovoltaic module manufacturing apparatus, including any of the aforementioned photovoltaic module end wire folding devices, wherein the folding device is used to rotate and fold the pre-bent portion of the wire at the end of the photovoltaic module along the bending point to the first surface of the solar cell, and further includes:

[0032] A jumper wire manufacturing mechanism for manufacturing jumpers that connect to the ends of photovoltaic modules;

[0033] A conveyor mechanism is used to transport the jumper wire to the photovoltaic module and overlap the two ends of the jumper wire with the pre-bent portion of the conductor.

[0034] A welding mechanism for heating and welding the overlap of the pre-bent portions of the jumper wires and the photovoltaic module ends.

[0035] The beneficial effects of the photovoltaic module end wire folding method proposed in this invention are as follows: By pre-pressing the pre-set bending point of the solder strip extending from the edge of the cell at the end of the photovoltaic module, the solder strip and busbar on one side of the bending point serve as the wire pre-bending part. After pressing and fixing the bending point, the wire pre-bending part is driven to bend directly towards the upper part of the first surface of the cell. The wire pre-bending part rotates along the bending point and folds onto the first surface of the cell, that is, folds onto the back surface of the cell. This reduces the area occupied by the cell string per unit area of ​​the photovoltaic module and improves the power generation efficiency per unit surface of the photovoltaic module. At the same time, the wire folding method is simple, and the position accuracy of the wire pre-bending part folding onto the first surface of the cell is precisely controlled by continuous driving when the wire pre-bending part rotates along the bending point. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a partial schematic diagram of the photovoltaic module proposed in this application;

[0038] Figure 2 This is a schematic diagram illustrating the manufacturing steps of the first photovoltaic module end wire folding method proposed in this invention;

[0039] Figure 3 This is a schematic diagram illustrating the manufacturing steps of the second photovoltaic module end wire folding method proposed in this invention;

[0040] Figure 4 This is a schematic diagram illustrating the manufacturing steps of the third photovoltaic module end wire folding method proposed in this invention;

[0041] Figure 5 This is a schematic diagram of another form of photovoltaic module proposed in this invention;

[0042] Figure 6 This is a schematic diagram of the clamping mechanism proposed in this invention;

[0043] Figure 7 This is a schematic diagram of the pressing mechanism proposed in this invention;

[0044] Figure 8 This is a schematic diagram of the positioning mechanism proposed in this invention.

[0045] The attached figures are labeled as follows:

[0046] 1. Pressing component; 101. First driving component; 102. Second driving component; 103. Pressing mechanism; 104. Extraction device; 10. Battery cell; 11. Wire; 111. Welding strip; 112. Busbar; 12. Insulating film strip; 2. Receiving component; 20. Clamping mechanism; 21. Limiting component; 211. Bracket; 212. Driving cylinder; 213. Rotating pressure rod; 22. Translation driving component; 3. Support platform; 31. Receiving cavity; 4. Die structure; 5. Positioning mechanism. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0049] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0050] like Figure 1As shown, existing photovoltaic modules consist of several cell strings, with a solder strip 111 extending from the end of each cell string. The solder strip 111 extending to the cell 10 is connected in series or parallel with other cell strings via a busbar 112. The busbar 112 located at the end of the photovoltaic module and the solder strip 111 welded to it occupy part of the effective area of ​​the photovoltaic module, failing to maximize the utilization of the effective area. Therefore, by folding the portion of the busbar 112 located within the light-receiving surface of the photovoltaic module at the end of the photovoltaic module to the first side of the cell 10 at the end of the cell string, i.e., the back side of the cell 10, it is possible not only to improve the effective area utilization rate within the light-receiving surface of the photovoltaic module and increase the power generation efficiency per unit area, but also to improve the aesthetics of the photovoltaic module by eliminating the presence of the busbar 112 on the front side.

[0051] The present invention proposes a method for folding the end conductor 11 of a photovoltaic module, such as... Figure 2 As shown, the photovoltaic module includes: a plurality of matrix-arranged cell strings, and wires 11 extending from the ends of the cell strings. The wires 11 include solder strips 111 of a predetermined length and / or busbars 112 connecting the ends of the solder strips 111.

[0052] By simultaneously pressing the surface of the busbar 112 extending from the edge of the solar cell 10 at the end of the photovoltaic module and the surface of several solder strips 111 between the solar cell 10, the pressing point serves as the preset bending point of the conductor 11 extending from the edge of the solar cell 10, and the solder strip 111 and the busbar 112 on one side of the preset bending point constitute the pre-bent portion of the conductor 11.

[0053] Then drive the pre-bent part of the wire on one side of the preset bending point to rotate along the bending point and fold it to the first surface of the cell 10. The first surface of the cell 10 with the folded wire pre-bent part serves as the back surface of the photovoltaic module, and the side away from the first surface of the cell 10 and without the busbar 112 serves as the light-receiving surface of the cell 10, that is, the front surface of the photovoltaic module.

[0054] In some embodiments, the process of driving the pre-bent portion of the lead wire 11 to rotate and fold along the bending point to the first surface of the cell 10 further includes: after the photovoltaic module end is pressed, the lead wire 11 pre-bent portion along the side of the bending point will be bent upward at a preset angle, the solder strip 111 will be released, and then the lead wire 11 pre-bent portion will be driven to rotate and fold along the preset bending point to the first surface of the cell 10.

[0055] 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 part of the wire 11 has a tendency to bend towards the first surface of the battery cell 10. When the pre-bent part of the wire 11 is driven to rotate towards the first surface of the battery cell 10, it is no longer necessary to continuously press against the bending point. It is only necessary to drive the pre-bent part of the wire 11 to rotate along the bending point.

[0056] In another embodiment, the pre-bent portion of the drive wire 11 rotates along the bending point and folds onto the first surface of the battery cell 10, including:

[0057] Step a: While pressing down on the welding strip 111, the pre-bent part of the drive wire 11 rotates at a preset bending point as the center of rotation towards the pressing side by a first angle, and then proceeds to step b.

[0058] Step b: Release the solder ribbon 111, drive the pre-bent part of the wire 11 to rotate in the same direction by a second angle, the second angle of rotation directly folds the pre-bent part of the wire 11 onto the first surface of the battery cell 10.

[0059] While pressing and tightening the welding strip 111, the pre-bent portion of the wire 11 is pre-rotated by 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 towards the side of the battery cell 10. The first angle gives the pre-bent portion of the wire 11 a predetermined bending direction. When the welding strip 111 is released and the second angle rotation is driven, the pre-bent portion of the wire 11 can continue to rotate along the bending point as the rotation center.

[0060] Preferably, after releasing the solder ribbon 111, while driving the pre-bent portion of the wire 11 to rotate toward the first side of the cell 10, the battery string outside the rotation range of the pre-bent portion of the wire 11 is pressed. After the force against the bending point is released, the surface of the battery string outside the rotation range of the pre-bent portion of the wire 11 is pressed down, and then the pre-bent portion of the wire 11 is driven to rotate to the back side of the cell 10 to prevent the force of driving the pre-bent portion of the wire 11 to rotate and push the battery string itself to move, so as to deviate from the target position in the photovoltaic module.

[0061] Furthermore, before pressing the bending point on the surface of the solder strip 111 along the edge of the extended solar cell 10, the end of the photovoltaic module or cell string is placed on a support surface in advance. This 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 and second support sub-surfaces are not coplanar. After pressing the preset bending point, the pre-bent portion of the conductor 11 is driven to rotate around the preset bending point, flipping the pre-bent portion of the conductor 11 to the upper part of the solar cell 10.

[0062] In some cases, the first bearing sub-surface and the second bearing sub-surface are not coplanar, including: the first bearing sub-surface and the second bearing sub-surface have different heights, or the first bearing sub-surface and the second bearing sub-surface form an included angle.

[0063] The bending process only requires a receiving part 2 to rotate and fold the pre-bent part of the wire 11 and press it against one side of the backlight surface of the battery cell 10. The process is simple and improves efficiency.

[0064] In addition, in some specific embodiments, lifting the end of the battery string onto the support surface includes: lifting the entire photovoltaic module or one end of the photovoltaic module requiring bending of the welding strip 111 onto the support surface using other mechanisms, or lifting the entire photovoltaic module or one end of the photovoltaic module requiring bending of the welding strip 111 using other mechanisms. After the support surface moves below the pre-bent portion of the conductor 11, the photovoltaic module is released, and the pre-bent portion of the conductor 11 is placed on the support surface for subsequent bending.

[0065] Preferably, the photovoltaic module end conductor 11 folding method in this application further includes, while rotating the bearing surface around a preset bending point towards the pressing side, simultaneously shifting the busbar 112 a certain distance along its length, so that the pre-bent portion of the conductor 11 does not overlap with the solder strip 111 welded to the surface of the solar cell 10, and the pre-bent portion of the conductor 11 does not contact the solder strip 111 connected to the backlight surface of the solar cell 10. Figure 5 As shown, the folded solder ribbon 111 and the solder ribbon 111 on the back surface of the cell 10 are bent at the bending point with a misalignment angle t, where t is no greater than 90°. The folded solder ribbon 111 can be stacked within the gap between the solder ribbons 111 on the back surface of the cell 10, without exceeding the gap between two adjacent solder ribbons 111 on the surface of the cell 10, and is misaligned with the solder ribbons 111 on the back surface of the cell 10. This reduces the overall thickness of the pre-bent portion of the conductor 11 and the stacked portion of the cell 10 after bending, preventing power attenuation and reduced module quality caused by air bubbles generated during lamination vacuuming due to the increased thickness of the folded solder ribbon 111. It can also reduce the amount of EVA film used for lamination of photovoltaic modules, thereby reducing the manufacturing cost of photovoltaic modules.

[0066] In other embodiments, reference is made to Figure 5 As shown, the distance L between the bending point and the edge of the end cell 10 of the battery string is ≤5mm. In specific applications, it can be 1mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, etc., and can be selected and set according to the process requirements. After bending, the portions of several solder ribbons 111 extending beyond the edge of the cell 10 are all connected to the surface of the insulating film on the back side of the cell 10. The length of the solder ribbons 111 extending beyond the edge of the cell 10 after bending is less than or equal to 5mm, which improves the utilization rate of the light-receiving surface of the photovoltaic module.

[0067] In addition, to prevent the solder strip 111 and the busbar 112 of the first surface of the battery cell 10 and the pre-bent portion of the conductor 11 from overlapping after folding, which could cause a short circuit in the battery cell 10, an insulating film strip 12 is sandwiched between the first surface of the battery cell 10 and the pre-bent portion of the conductor 11 after bending. The width of the insulating film strip 12 is not less than the width of the pre-bent portion of the conductor 11. (Refer to...) Figure 5As shown, before placing the pre-bent portion of the conductor 11 on the bearing surface of the receiving member 2, an insulating film strip 12 is also laid on the edge of the first side of the photovoltaic module end cell 10. The pre-bent portion of the conductor 11 after bending is stacked on the insulating film of the first side of the cell 10 to prevent the solder strip 111 and 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.

[0068] On the other hand, based on the above-described folding method for the photovoltaic module end conductor 11, this application also proposes a folding device for the photovoltaic module end conductor 11, comprising:

[0069] The support platform 3 is used to at least support the bottom of the end wires 11 of the battery string;

[0070] The pressing mechanism 103 is movably disposed above the support platform 3 and is used to press the preset bending point of the welding strip 111 extending from the edge of the cell 10 at the end of the photovoltaic module.

[0071] A 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.

[0072] When folding the end wire 11 of the photovoltaic module, the photovoltaic module is first placed on the support platform 3. Then, the pressing mechanism 103 moves to the upper part of the solder strip 111 between the edge of the end cell 10 of the photovoltaic module and the busbar 112, and presses the surface of the solder strip 111 between them as a preset bending point. The pre-bent part of the wire 11 on the side of the pressed solder strip 111 is folded upward at a certain preset angle. After releasing the wire 11, the folding mechanism presses the folded part of the wire 11 on the support surface against the first surface of the end cell 10 of the photovoltaic module.

[0073] In some embodiments, the bearing surface on the support platform 3 or the folding mechanism for holding the pre-bent portion of the wire 11 is an upwardly inclined slope. The bearing surface is an inclined slope that is inclined toward the folding direction of the pre-bent portion of the wire 11. The preset slope has an angle between it and the horizontal plane, and the slope is inclined toward the bending point of the welding strip 111. This can provide the pressing member 1 with a tendency to bend toward the battery cell 10 when pressing the welding strip 111 and the busbar 112. This makes the preset angle of the upward bending of the pre-bent portion of the wire 11 more obvious after the pressing member 1 presses the welding strip 111. When the bearing surface bends the battery cell 10, the rotation angle and movement amplitude of the bearing surface and the pre-bent portion of the wire 11 on the bearing surface are reduced, so as to reduce the positional variation of the pre-bent portion of the wire 11 and improve the stability and bending position accuracy of the pre-bent portion of the wire 11 by the bearing surface.

[0074] Specifically, the photovoltaic module end wire 11 folding device also includes an extraction device 104 that is vertically mounted above the support 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 part of the wire 11 in the photovoltaic module can be placed on the support surface of the folding mechanism. The folding mechanism drives the pre-bent part of the wire 11 to rotate a preset angle along the preset bending point as the rotation point.

[0075] As a preferred embodiment, such as Figure 4 As 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 facing 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 part extending towards the side of the battery cell 10. The blocking part blocks the pre-bent part of the bent wire 11 to 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. The pre-bent portions of 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 towards the side of the battery cell 10 at a relatively large preset angle. This makes the pre-bent portion of the wire 11 restricted by the blocking part at the top of the groove opening within the preset pressing angle at the top of the groove opening. The preset pressing angle is such that the pre-bent portion of the wire 11 is inclined towards the battery cell 10. Under the restriction of the top of the groove, the pre-bent portion of the wire 11 after being pressed is bent along the bending point above the battery cell 10 by the pressure of the pressing.

[0076] Next, the pre-bent portion of the wire 11 located above the solar cell 10 is pressed and bent by the groove, leaving an angle between it and the solar cell 10. For the overall aesthetics of the photovoltaic module, the positioning mechanism 5 presses the pre-bent portion of the wire 11, which has an angle with the solar cell 10, from the top to the top of the insulating film on the back of the solar cell 10 and keeps it flat.

[0077] Specifically, the folding mechanism includes a rotary drive and a receiving component 2 for receiving the pre-bent portion of the welding strip 111. The receiving component 2 is rotatably connected to the rotary drive via 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 rotary drive drives the receiving component 2 to receive the pre-bent portion of the wire 11 and rotate it upward by a certain angle. The pressing mechanism 103 is then removed from the rotation range of the folding mechanism. The rotary drive then rotates the receiving component 2 to press the folded portion of the wire 11 against the first surface of the battery cell 10.

[0078] In this embodiment, the receiving member 2 serves as a carrier for the pre-bent portion of the conductor 11. With the bending point as the center of rotation, it rotates the pre-bent portion of the conductor 11, which is placed on the side of the bending point on the bearing surface, and presses it against the backlight surface of the battery cell 10 using the bearing surface. In some embodiments, refer to... Figure 3 As shown, the bearing surface of the receiving component 2 can also be a horizontal plane. The pre-bent part of the wire 11 placed on the receiving component 2 is parallel or overlaps with other parts of the photovoltaic module. The pre-bent part of the wire 11 placed on the horizontal bearing surface is rotated 180 degrees and then folded on the back of the cell 10.

[0079] In some embodiments, a pad mechanism is provided on one side of the rotation point of the bending mechanism. Both the pad mechanism and the folding mechanism are connected to the moving drive mechanism. After the extraction device 104 lifts the end of the photovoltaic module from the support platform 3, the moving drive mechanism moves the folding mechanism to below the solder strip 111 and busbar 112 extending from the cell 10 portion on one side of the bent point of the lifted photovoltaic module. At the same time, the pad mechanism is moved to place the photovoltaic module portion on the other side of the bent point on the photovoltaic module above the pad mechanism. After the extraction device 104 releases the end of the photovoltaic module, the solder strip 111 and busbar 112 that need to be bent are placed on the receiving member 2 of the folding mechanism and removed from the rotation range of the receiving member 2. Subsequently, the pressing mechanism 103 presses the solder strip 111 at the bent point between the pad mechanism and the receiving member 2 of the folding mechanism.

[0080] In some embodiments, the pad mechanism has a stepped surface at a preset bending point for receiving the front end of the photovoltaic module. The front edge of the pressing mechanism 103 presses the welding strip 111 placed at the root of the stepped surface, so that the welding strip 111 to be bent and the busbar 112 are pressed and warped by the pressing mechanism 103 at a preset angle.

[0081] In some embodiments, such as Figure 3 As shown, the support platform 3 is provided with a receiving cavity 31, which is used to receive the receiving component 2, so that the bearing surface of the receiving component 2 is horizontal. Specifically, the horizontal bearing surface can hide part or all of the volume of the receiving component 2 used to support the pre-bent part of the wire 11 below the horizontal surface, so that the bearing surface of the receiving component 2 is flush with the horizontal surface, the pre-bent part of the wire 11 is placed on the horizontal bearing surface, and the receiving component 2 is rotated 180° to fold the pre-bent part of the wire 11 onto the backlight surface of the battery cell 10, so that the pre-bent part of the wire 11 is directly folded onto the backlight surface of the battery cell 10.

[0082] Additionally, refer to Figure 6As shown, the photovoltaic module end conductor 11 folding device also includes a clamping mechanism 20. The clamping mechanism 20 includes a translation drive component 22 and a limiting component 21. The drive end of the translation drive component 22 is driven to connect with the folding mechanism and the limiting component 21. The limiting component 21 is used to fix the pre-bent portion of the conductor 11 placed on the folding mechanism onto the folding mechanism. The translation drive component 22 simultaneously drives the limiting component 21 and the folding mechanism to translate as a whole along the length direction of the busbar 112. The folding mechanism and the limiting component 21 together 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 solder strip 111 in the pre-bent portion of the conductor 11 and the solder strip 111 on the surface of the cell 10 form an angle, and are staggered with the solder strip 111 on the surface of the cell 10.

[0083] Specifically, the limiting member 21 includes a bracket 211 connected to the translation drive component 22, a drive cylinder 212 fixedly connected to the bracket, and a rotating pressure rod 213 pivotally connected to the bracket. The drive end of the drive cylinder 212 is rotatably connected to the rotating pressure rod 213. The drive cylinder 212 drives the rotating pressure rod 213 to press against or move away from the pre-bent portion of the wire 11 on the bearing surface of the folding mechanism.

[0084] In the specific plan, 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 disposed 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 disposed 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 acute angle structure of the pressing member 1 can press against the smaller area of ​​the solder strip 111, so that a larger area of ​​the solder strip 111 is divided into the pre-bending portion of the wire 11, so as to fold the larger area of ​​the solder strip 111 extending from the end of the battery string to the back of the battery cell 10, further improving the bending accuracy of the wire 11.

[0085] In some embodiments, refer to Figure 8 As shown, the photovoltaic module end wire 11 folding device also includes a movable positioning mechanism 5 disposed above the photovoltaic module. The positioning mechanism 5 is used to fix the battery string outside the rotation range of the pre-bent part of the wire 11.

[0086] When the folding mechanism drives the wire 11 to bend and rotate, and the pressing mechanism 103 releases the welding strip 111, the pressing mechanism 103 presses the battery string other than the pre-bent part of the wire 11 to prevent the force that drives the pre-bent part of the wire 11 to rotate from pushing the battery string itself to deviate from the target position in the photovoltaic module.

[0087] On the other hand, based on the aforementioned photovoltaic module bending device, this application also proposes a photovoltaic module fabrication device.

[0088] A jumper wire manufacturing mechanism for manufacturing jumpers that connect to the ends of photovoltaic modules;

[0089] The conveyor mechanism is used to transport the jumper wires prepared by the jumper wire preparation mechanism to the photovoltaic module and to overlap the two ends of the jumper wires with the pre-bent part of the conductor 11.

[0090] A welding mechanism is used to heat and weld the overlap of the pre-bent portions of the jumper wires and the photovoltaic module ends together.

[0091] The folding device rotates and folds the pre-bent part of the conductor 11 along the preset bending point to the first surface of the cell 10. The conveyor 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 part of the conductor 11. The stacked jumper end and the busbar 112 are heated and welded together by the welding mechanism.

[0092] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0093] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A photovoltaic module end wire folding device, characterized in that, include: A support platform (3) is used to at least support the bottom of the end wires of the battery string; The pressing mechanism (103) is movably disposed above the support platform and is used to press the preset bending point of the welding strip (111) extending from the edge of the battery cell at the end of the photovoltaic module. 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 disposed 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 disposed 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). A folding mechanism is used to drive the pre-bent part of the wire on one side of the bending point to rotate along the bending point and fold to the first surface of the battery cell (10); The clamping mechanism (20) includes a translation drive component (22) and a limiting component (21). The drive end of the translation drive component (22) is connected to the folding mechanism and the limiting component (21). The limiting component (21) is used to limit the pre-bent portion of the wire on the folding mechanism to the folding mechanism.

2. The photovoltaic module end wire folding device according to claim 1, characterized in that, The bearing surface of the bearing platform (3) or the folding mechanism for holding the pre-bent part of the wire is an upwardly inclined slope.

3. The photovoltaic module end wire folding device according to claim 1, characterized in that, It also includes an extraction device (104) that is vertically mounted above the support platform (3), the extraction device (104) being used to lift the end of the photovoltaic module or battery string so that the pre-bent part of the wire can be placed on the folding mechanism.

4. The photovoltaic module end wire folding device according to claim 1, characterized in that, The bearing platform at the bending point is also provided with a concave mold structure (4). The pressing mechanism (103) presses the welding strip (111) into the groove of the concave mold structure (4). The top of the groove is provided with a blocking part extending towards the side of the battery cell. The blocking part blocks the pre-bent part of the bent wire to the battery cell (10) on the side of the preset bending point.

5. The photovoltaic module end wire folding device according to claim 1, characterized in that, The folding mechanism includes a rotary drive and a receiving component (2) for receiving the pre-bent portion of the welding strip. The rotary drive is rotatably connected to the receiving component (2) via a rotating shaft, and the axis of the rotating shaft coincides with the preset bending point of the welding strip (111).

6. The photovoltaic module end wire folding device according to claim 1, characterized in that, The support platform (3) includes a pad mechanism located on one side of the rotation point of the folding mechanism. Both the pad mechanism and the folding mechanism are connected to the moving drive mechanism, which is used to move the pad mechanism and the folding mechanism to below the end of the battery string.

7. The photovoltaic module end wire folding device according to claim 6, characterized in that, The pad mechanism has a stepped surface at the preset bending point for receiving the end of the battery string. The front edge of the pressing mechanism presses the welding strip (111) placed at the intersection of the stepped surface, causing the pre-bent part of the conductor to bend upward at a preset angle.

8. The photovoltaic module end wire folding device according to claim 5, characterized in that, The support platform (3) is provided with a receiving cavity (31), which is used to receive the receiving component (2) so that the bearing surface of the receiving component (2) is horizontal.

9. The photovoltaic module end wire folding device according to claim 1, characterized in that, The limiting member (21) includes a bracket (211) connected to the translation drive component (22), a drive cylinder (212) fixedly connected to the bracket (211), and a rotating pressure rod (213) pivotally connected to the bracket (211). The drive end of the drive cylinder (212) is rotatably connected to the rotating pressure rod (213). The drive cylinder (212) drives the rotating pressure rod (213) to press against or move away from the wire pre-bent portion on the folding mechanism.

10. The photovoltaic module end wire folding device according to claim 1, characterized in that, It also includes a movable positioning mechanism (5) disposed above the photovoltaic module, the positioning mechanism (5) being used to fix the battery string outside the rotation range of the wire pre-bending section.

11. A method for folding end conductors of a photovoltaic module, using the photovoltaic module end conductor folding device as described in any one of claims 1 to 10, wherein the photovoltaic module comprises: A plurality of battery strings are arranged in a matrix, and wires (11) extending from the ends of the battery strings, the wires (11) comprising solder strips (111) of a predetermined length and / or busbars (112) connecting the ends of the solder strips (111); characterized in that, The surface of several solder strips (111) extending from the end of the battery string is pressed against, and the pressing point serves as the preset bending point of the conductor (11). The conductor on one side of the preset bending point is the pre-bent part of the conductor. Drive the pre-bent part of the wire to rotate along the preset bending point and fold it onto the first surface of the battery cell (10); The wire pre-bending section is shifted as a whole so that the solder strip (111) of the wire pre-bending section does not overlap with the solder strip (111) connected to the battery cell (10).

12. The photovoltaic module end wire folding method according to claim 11, characterized in that, Driving the wire pre-bending part to rotate along the bending point and fold onto the first surface of the battery cell (10) includes: after the wire pre-bending part on the side of the bending point after being pressed is bent upward at a preset angle, the welding strip is released, and the wire pre-bending part is driven to rotate and fold along the preset bending point onto the first surface of the battery cell (10).

13. The photovoltaic module end wire folding method according to claim 11, characterized in that, Driving the pre-bent portion of the conductor to rotate along the bending point and fold onto the first surface of the battery cell (10) includes: Step a: While pressing down on the welding strip (111), drive the pre-bent part of the conductor to rotate a first angle towards the side of the battery cell with the preset bending point as the rotation center. Step b: Release the solder strip, drive the pre-bent part of the wire to rotate in the same direction by a second angle, and fold the pre-bent part of the wire (11) onto the first surface of the battery cell (10).

14. The photovoltaic module end wire folding method according to claim 12 or 13, characterized in that, After releasing the solder strip, while driving the pre-bent section of the wire to rotate toward the first side of the battery cell, the battery string outside the rotation range of the pre-bent section of the wire is pressed.

15. The photovoltaic module end wire folding method according to claim 11, characterized in that, Before pressing the pre-set bending point on the surface of the solder strip extending from the end of the battery string, the process further includes: lifting the end of the battery string onto a bearing surface, the bearing surface including a first bearing sub-surface for receiving the end of the battery string and a second bearing sub-surface for receiving the pre-bent portion of the conductor, the first bearing sub-surface and the second bearing sub-surface are not coplanar, and the pre-set bending point is located at the connection between the first bearing sub-surface and the second bearing sub-surface.

16. The photovoltaic module end wire folding method according to claim 11, characterized in that, The distance L between the bending point and the edge of the end battery cell (10) of the battery string is ≤5mm.

17. The photovoltaic module end wire folding method according to claim 11, characterized in that, Before driving the pre-bent portion of the conductor to rotate along the bending point and fold onto the first surface of the battery cell (10), an insulating film strip (12) is laid on the edge of the first surface of the battery cell (10) at the end of the battery string, the width of the insulating film strip being not less than the width of the pre-bent portion of the conductor.

18. A photovoltaic module manufacturing apparatus, characterized in that, Including the photovoltaic module end conductor folding device as described in any one of claims 1 to 10, the folding device being used to rotate and fold the pre-bent portion of the conductor at the end of the photovoltaic module along the bending point to the first surface of the solar cell (10), further comprising: A jumper wire manufacturing mechanism for manufacturing jumpers that connect to the ends of photovoltaic modules; A conveyor mechanism is used to transport the jumper wire to the photovoltaic module and overlap the two ends of the jumper wire with the pre-bent portion of the conductor. A welding mechanism for heating and welding the overlap of the pre-bent portions of the jumper wires and the photovoltaic module ends.

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