A device and method for pre-processing welding ribbon for series connection of battery cells

Abstract

The present invention relates to the technical field of photovoltaic cell assemblies, and specifically, a device and method for pre-processing welding ribbons for series connection of cell panels are invented. The device comprises: two welding ribbon unwinding mechanisms; a bidirectional traction mechanism capable of alternately traction of all even-numbered welding ribbons to a first preset position and all odd-numbered welding ribbons to a second preset position; a ribbon making platform capable of moving upward to meet the even-numbered welding ribbons that have reached the first preset position or the odd-numbered welding ribbons that have reached the second preset position; two first cutting mechanisms, respectively used to pre-cut all even-numbered welding ribbons and all odd-numbered welding ribbons, and to adjust them after cutting so that the ends of the welding ribbons to be entered into the ribbon making platform are exposed to a preset length; the ribbon making mechanism can cut all segments on the ribbon making platform into preset lengths, and adjust the distance between two axially adjacent welding ribbon segments after cutting to a preset distance. The device and method can improve working efficiency and welding ribbon slitting accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic cell assemblies, and in particular to a device and method for pre-treating a welding ribbon for series connection of cell slices. Background Art

[0002] During the production of photovoltaic cell string modules, the solder ribbons must be pre-processed. This involves loading multiple rolls of solder ribbon onto a ribbon-making platform, where they are then staggered and cut into groups of preset lengths. The ribbons are then adjusted in pitch, and then a robotic arm moves the adjusted group of ribbons to a preset stacking position for stacking with the cells. Within a group, the odd-numbered ribbons are longer than the even-numbered ribbons.

[0003] The existing method for processing solder ribbons involves pulling the ribbons forward in a unidirectional manner. Upon reaching the first ribbon placement position, all even-numbered ribbons are released from the pull and fall to the first ribbon placement position. Further pulling is performed until reaching the second ribbon placement position, at which point all odd-numbered ribbons are released from the pull and fall to the second ribbon placement position. All ribbons are then cut. All odd-numbered ribbons and all even-numbered ribbons are alternately cut to form several first ribbon groups and several second ribbon groups. The spacing between each first ribbon group and each second ribbon group is adjusted according to the welding requirements of the battery string. However, the efficiency and accuracy of this solder ribbon preprocessing method need to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and method for pre-processing solder strips for series connection of battery cells, which can improve the working efficiency and the solder strip slitting accuracy.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A solder ribbon pre-processing device for connecting battery cells in series, comprising two solder ribbon unwinding mechanisms, a bidirectional traction mechanism, a ribbon making platform, two first cutting mechanisms, and a ribbon making mechanism;

[0007] The two soldering ribbon unwinding mechanisms are respectively used to provide the odd-numbered soldering ribbons and the even-numbered soldering ribbons required for the series connection of the solar cells;

[0008] The bidirectional traction mechanism is located between the two welding ribbon unwinding mechanisms, and can alternately pull all even-numbered welding ribbons to the first preset position and pull all odd-numbered welding ribbons to the second preset position;

[0009] The strip making platform is located below the bidirectional traction mechanism, and a plurality of strip grooves are provided at intervals on the top surface thereof, and can move upward to accommodate the even-numbered strips that have reached the first preset position or the odd-numbered strips that have reached the second preset position into the corresponding strip grooves;

[0010] The two first cutting mechanisms are respectively arranged between the bidirectional traction mechanism and the two soldering ribbon unwinding mechanisms, and are used to cut all even-numbered soldering ribbons entering the soldering platform and all odd-numbered soldering ribbons entering the soldering platform, and adjust them after cutting so that the ends of the soldering ribbons to be entered into the soldering platform are exposed to a preset length;

[0011] The strip making mechanism is located on the strip making platform, and can cut all the even-numbered welds and the odd-numbered welds in each of the weld strip grooves into segments with preset lengths, and adjust the distance between two axially adjacent weld strips after cutting to a preset distance.

[0012] As a preferred embodiment of the present invention, the bidirectional traction mechanism includes a slide, a plurality of first clamping assemblies for clamping odd-numbered welding strips, a plurality of second clamping assemblies for clamping even-numbered welding strips, and a slide driving member; driven by the slide driving member, the slide slides back and forth between the two welding strip unwinding mechanisms; each of the first clamping assemblies and each of the second clamping assemblies are arranged on the slide, and are alternately staggered along a sliding direction perpendicular to the slide.

[0013] As a preferred embodiment of the present invention, the tape making platform includes two first placement tables arranged at intervals and multiple second placement tables arranged in sequence between the two first placement tables, the top surface of the first placement table is provided with multiple first placement grooves with both ends passing through; the top surface of the second placement table is provided with multiple second placement grooves that are respectively aligned with and passed through each of the first placement grooves; the two first placement grooves and several second placement grooves that are coaxially connected constitute the welding tape groove.

[0014] As a preferred embodiment of the present invention, the strip making mechanism includes a plurality of holding mechanisms respectively arranged on the first placing table and each of the second placing tables; the holding mechanism includes a plurality of first pressing blocks for holding odd-numbered welding strips, a plurality of second pressing blocks for holding even-numbered welding strips and two first driving components, each of the first pressing blocks and each of the second pressing blocks are alternately staggered, and the holding ends are movably extended out of the top surface of the first placing table or the top surface of the second placing table; the two first driving components respectively drive each of the first pressing blocks and each of the second pressing blocks to rotate and move downward; the first placing table and the second placing table are provided with a plurality of first avoidance grooves for avoiding each of the first pressing blocks and a plurality of second avoidance grooves for avoiding each of the second pressing blocks.

[0015] As a preferred embodiment of the present invention, the first driving assembly includes a first fixed plate for supporting each first pressure block or each second pressure block, two first connecting rods parallel to each other, a first support and a first cylinder, the first support is connected to the first placement table or the second placement table, the two ends of the first connecting rod are respectively hinged to the first fixed plate and the first support; the piston end of the first cylinder is connected to the first fixed plate.

[0016] As a preferred embodiment of the present invention, the tape making mechanism further includes a plurality of second cutting mechanisms for cutting odd-numbered welding tapes and a plurality of third cutting mechanisms for cutting even-numbered welding tapes; the second cutting mechanism is provided between the first placement table and the adjacent second placement table and between two adjacent second placement tables, and each second placement table is provided with the third cutting mechanism;

[0017] The second cutting mechanism and the third cutting mechanism both include a plurality of cutters arranged side by side and a second driving assembly for driving the cutters to rotate and move downward together; the second placement table is provided with a vertical avoidance groove connected to the second placement grooves, and each cutter is movably arranged in the avoidance groove, and the cutter head extends out of the top surface of the second placement table.

[0018] As a preferred embodiment of the present invention, the second drive assembly includes a second fixed plate for supporting each of the cutters, two second connecting rods parallel to each other, a second support and a second cylinder, the second support is connected to the first placement table or the second placement table, the two ends of the second connecting rod are respectively hinged to the second fixed plate and the second support; the piston end of the second cylinder is connected to the second fixed plate.

[0019] As a preferred embodiment of the present invention, the belt making mechanism also includes a distance changing mechanism connected to the two first placing tables and each second placing table. The distance changing mechanism can drive each second placing table located on both sides of the center and the first placing table to move relative to the second placing table located in the center, so that the distance between the first placing table and the adjacent second placing table and the distance between two adjacent second placing tables are adjusted to a preset distance.

[0020] As a preferred embodiment of the present invention, the first cutting mechanism includes a belt pressing assembly and a cutting assembly arranged side by side; the belt pressing assembly includes a belt pressing seat, a plurality of pressure blocks and a plurality of first driving members; the belt pressing seat is provided with a plurality of first guide slots that are respectively aligned and connected with each of the welding belt slots; each of the pressure blocks is respectively located above each of the first guide slots and can be respectively moved up and down under the drive of each of the first driving members; the cutting assembly includes a cutting seat, a driving plate, a pressure plate, a cutting knife and a second driving member; the cutting seat is slidably arranged relative to the belt pressing seat and is provided with a plurality of second guide slots that are respectively aligned and connected with each of the welding belt slots and each of the first guide slots; the driving plate is located above each of the second guide slots and can be moved up and down under the drive of the second driving member; the pressure plate is connected to the bottom of the driving plate by a group of springs; the cutting knife is located at one end of each of the second guide slots facing the two-way traction mechanism and is connected to the driving plate.

[0021] A method for pre-treating a solder ribbon for connecting battery cells in series, comprising the following steps:

[0022] S1: Two solder ribbon unwinding mechanisms are used to provide the odd-numbered solder ribbons and even-numbered solder ribbons required for connecting the cells in series.

[0023] S2: Using a bidirectional traction mechanism, pull all even-numbered welding ribbons along a first direction to a first preset position;

[0024] S3: The tape making platform moves upward to meet the even-numbered soldering ribbons that have reached the first preset position; all the even-numbered soldering ribbons are pressed by the tape pressing assembly located on one side of the tape making platform; all the even-numbered soldering ribbons are cut by the cutting assembly, and after cutting, the tape pressing assembly moves toward the tape pressing assembly so that the ends of the even-numbered soldering ribbons are exposed to a preset length;

[0025] S4: Using the pressing mechanism provided on the strip making platform to press and fix all the even-numbered strips; the strip making platform moves downward to reset;

[0026] S5: Using a bidirectional traction mechanism, pull all odd-numbered welding ribbons to a second preset position in a direction opposite to the first direction;

[0027] S6: The tape making platform moves upward to meet the odd-numbered solder ribbons that have reached the second preset position; the tape pressing assembly located on the other side of the tape making platform is used to press and hold all the odd-numbered solder ribbons; the cutting assembly is used to cut all the odd-numbered solder ribbons, and after cutting, the tape pressing assembly is moved toward the tape pressing assembly so that the ends of the odd-numbered solder ribbons are exposed to a preset length;

[0028] S7: Using the pressing mechanism provided on the strip making platform to press and fix all the odd-numbered strips; the strip making platform moves downward to reset;

[0029] S8: Utilize several second cutting mechanisms and several third cutting mechanisms provided on the tape making platform to synchronously cut all odd-numbered welding tapes and all even-numbered welding tapes in sections respectively; utilize the distance-changing mechanism to adjust the distance between the coaxially adjacent welding tapes at both ends after cutting to a preset distance, thereby completing the welding tape preprocessing.

[0030] The beneficial effects of the present invention are:

[0031] 1. The present invention provides a device and method for pre-processing solder ribbons for series connection of battery cells. Two solder ribbon unwinding mechanisms are used to respectively provide the odd-numbered solder ribbons and the even-numbered solder ribbons required for series connection of battery cells. A bidirectional traction mechanism is used to alternately pull all the even-numbered solder ribbons to a first preset position and all the odd-numbered solder ribbons to a second preset position. The solder ribbon loading efficiency is high and the loading position accuracy is high.

[0032] 2. A device and method for preprocessing welding ribbons for connecting battery cells in series of the present invention adopts a method in which a welding ribbon making platform moves upward to receive all even-numbered welding ribbons moved to a first preset position or the odd-numbered welding ribbons moved to a second preset position. After the welding ribbon making platform receives all welding ribbons and resets, a welding ribbon making mechanism is used to synchronously cut all odd-numbered welding ribbons and all even-numbered welding ribbons on the welding ribbon making platform in sections, and the distance between two axially adjacent welding ribbon sections after cutting is adjusted to a preset distance. The welding ribbon cutting accuracy is high, and the length consistency of the welding ribbons at each end after cutting is good, which is beneficial to improving the product quality of the battery assembly.

[0033] 3. The present invention provides a device and method for pre-processing solder ribbons for series connection of battery cells. After the ribbon making platform moves upward to meet and contact the even-numbered solder ribbons that have arrived at the first preset position or the odd-numbered solder ribbons that have arrived at the second preset position, a ribbon pressing assembly is first used to press all the even-numbered solder ribbons or all the odd-numbered solder ribbons, and then a cutting assembly is used to cut all the odd-numbered solder ribbons. After cutting, the device and method move toward the ribbon pressing assembly so that the ends of the solder ribbons to be pulled to the ribbon making platform are exposed to a preset length, and the solder ribbon pre-cutting accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural schematic diagram of a welding ribbon pretreatment device for series connection of battery cells provided by the present invention.

[0035] Figure 2 yes Figure 1 Schematic diagram of the partial structure of the bidirectional traction mechanism.

[0036] Figure 3 yes Figure 1 Schematic diagram of the structure of the belt making platform.

[0037] Figure 4 yes Figure 3 Schematic diagram of the structure of the second placement table.

[0038] Figure 5 yes Figure 3 Schematic diagram of the structure of the holding mechanism and the third cutting mechanism.

[0039] Figure 6 yes Figure 1 Schematic diagram of the structure of the first cutting mechanism.

[0040] Figure 7 yes Figure 1 A schematic structural diagram of the first cutting mechanism at another angle.

[0041] Figure 8 yes Figure 6 Schematic diagram of the structure of the cutting component in .

[0042] Figure 9 This is a flow chart of a method for pre-treating a solder strip for connecting battery cells in series provided by the present invention. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0044] like Figures 1 to 8 As shown, a device for pre-processing solder ribbons for series connection of battery cells comprises two solder ribbon unwinding mechanisms 1, a bidirectional traction mechanism 2, a ribbon making platform 3, two first cutting mechanisms 4 and a ribbon making mechanism 5; wherein, the two solder ribbon unwinding mechanisms 1 are respectively used to provide the odd-numbered solder ribbons and the even-numbered solder ribbons required for series connection of battery cells; the bidirectional traction mechanism 2 is located between the two solder ribbon unwinding mechanisms 1, and can alternately pull all the even-numbered solder ribbons to a first preset position and all the odd-numbered solder ribbons to a second preset position; the ribbon making platform 3 is located below the bidirectional traction mechanism 2, and has a plurality of solder ribbon grooves 30 spaced apart on its top surface, and can move upward to accommodate the even-numbered solder ribbons that have reached the first preset position or the odd-numbered solder ribbons that have reached the second preset position. The odd-numbered welding ribbons enter the corresponding welding ribbon grooves 30; the two first cutting mechanisms 4 are respectively arranged between the bidirectional traction mechanism 2 and the two welding ribbon unwinding mechanisms 1, and are respectively used to cut all the even-numbered welding ribbons entering the ribbon making platform 3 and all the odd-numbered welding ribbons entering the ribbon making platform 3, and adjust them after cutting so that the ends of the welding ribbons to be entered into the ribbon making platform 3 are exposed to a preset length; the ribbon making mechanism 5 is located on the ribbon making platform 3, and can cut all the even-numbered welding ribbons and odd-numbered welding ribbons located in each welding ribbon groove 30 into preset lengths, and adjust the distance between the two axially adjacent welding ribbon sections after cutting to a preset distance.

[0045] Specifically, the ribbon unwinding mechanism 1 includes a ribbon rack 11, a plurality of ribbon reels 12 arranged in an array on the ribbon rack 11, and a plurality of motors 13 that respectively drive the rotation of each ribbon reel 12. When in use, the motor 13 drives the corresponding ribbon reel 12 to rotate, thereby releasing the ribbon.

[0046] In the present invention, two solder ribbon unwinding mechanisms 1 are used to provide odd-numbered solder ribbons and even-numbered solder ribbons required for series connection of battery cells respectively. The space is relatively sufficient, so more solder ribbon reels 12 can be arranged, thereby achieving simultaneous loading of more solder ribbons.

[0047] like Figure 1 and 2 As shown, the bidirectional traction mechanism 2 includes a slide 21, a plurality of first clamping assemblies 22 for clamping odd-numbered welding strips, a plurality of second clamping assemblies 23 for clamping even-numbered welding strips, and a slide driving member; driven by the slide driving member, the slide 21 slides back and forth between the two welding strip unwinding mechanisms 1; each first clamping assembly 22 and each second clamping assembly 23 are arranged on the slide 21, and are alternately staggered along the sliding direction perpendicular to the slide 21.

[0048] The first clamping assembly 22 and the second clamping assembly 23 each include a clamping block 24, a clamping claw 25, and a clamping claw cylinder 26. The clamping block 24 is connected to the slide 21 and has a welding ribbon slot 241 defined on its top surface. The clamping claw 25 is rotatably connected to the top of the welding ribbon slot 241. The clamping claw cylinder 26 drives the clamping claw 25 to rotate relative to the clamping block 24. Furthermore, the piston end of the clamping claw cylinder 26 is connected to a driving block 27 having a U-shaped cross-section. The upper end of the clamping claw 25 is located within the driving block 27 and has a connecting hole 251 defined therein. A connecting rod 28 is disposed within the connecting hole 251, with both ends of the connecting rod 28 connected to the driving block 27.

[0049] During use, driven by the pressure claw cylinder 26, the pressure claw 25 rotates relative to the holding block 24, thereby pressing the ends of the even-numbered welding strips or the ends of the odd-numbered welding strips in the corresponding welding strip slots 241; driven by the slide drive member, the slide 21 moves, driving the clamped even-numbered welding strips or the odd-numbered welding strips to move to the first preset position or the second preset position.

[0050] like Figure 3As shown, the tape production platform 3 is mounted on a tape production base 33 and includes two first placement platforms 31 spaced apart and a plurality of second placement platforms 32 sequentially positioned between the two first placement platforms 31. The top surfaces of the first placement platforms 31 are provided with a plurality of first placement slots 311 extending through both ends; the top surfaces of the second placement platforms 32 are provided with a plurality of second placement slots 321 aligned with and extending through the first placement slots 311. The two first placement slots 311 and the plurality of second placement slots 321 coaxially connected together constitute the ribbon welding slot 30. The tape production base 33 is connected to a lifting drive 61 for vertical movement and a horizontal drive 62 for horizontal movement. The lifting drive 61 and the horizontal drive 62 are preferably cylinders.

[0051] like Figures 6 to 8 As shown, the first cutting mechanism 4 includes a belt pressing assembly 41 and a cutting assembly 42 arranged side by side. The belt pressing assembly 41 includes a belt pressing seat 411, a plurality of pressing heads 412, and a plurality of first driving members 413. The belt pressing seat 411 is provided with a plurality of first guide grooves 4111 that are aligned and connected to the respective welding ribbon grooves 30. The respective pressing heads 412 are located above the respective first guide grooves 4111 and can move up and down under the drive of the respective first driving members 413. The cutting assembly 42 includes a cutting seat 421, a driving plate 422, a pressure plate 4221, a cutting blade 423, and a second driving member 424. The cutting seat 421 is slidably arranged relative to the tape pressing seat 411 and is provided with a plurality of second guide slots 4211 that are aligned with and connect the respective welding tape slots 30 and the respective first guide slots 4111. The driving plate 422 is located above the respective second guide slots 4211 and can move up and down under the drive of the second driving member 425. The pressure plate 4221 is connected to the bottom of the driving plate 422 via a set of springs. The cutting blade 423 is located at one end of each second guide slot 4211 facing the bidirectional traction mechanism 2 and is connected to the driving plate 422. The first driving member 413 and the second driving member 424 are preferably cylinders.

[0052] The belt press assembly 41 further includes a first flip plate 414, which is positioned above each pressing head 412 and rotatably connected to the belt press seat 411 at one end. The other end is positioned on a first support block 4112 provided on the belt press seat 411 and is locked to the first support block 4112 via a first locking member 415, preferably a locking bolt. Each first driving member 413 is mounted on the first flip plate 414.

[0053] During use, driven by each first driving member 414, the pressing head 412 moves downward, thereby pressing and fixing the corresponding soldering ribbon in the corresponding first guide groove 4111. After replacing a new soldering ribbon roll, first unlock the first locking member 415, then flip open the first flip plate 414, and then place each new soldering ribbon in the corresponding first guide groove 4111. Finally, flip close the first flip plate 414 and lock the first locking member 415. This is very convenient to use.

[0054] Similar to the belt pressing assembly 41, the cutting assembly 42 also includes a second flip plate 425, which is located above the driving plate 422, and one end of the second flip plate 425 is rotatably connected to the cutting seat 421, and the other end is located on the second support block 4212 set on the cutting seat 421, and is locked with the second support block 4212 through a second locking member 426; the second driving member 424 is installed on the second flip plate 45.

[0055] Furthermore, the cutting seat 421 is connected to a third driving member 43, preferably a pneumatic cylinder, for driving its sliding motion. After the pre-cutting of the solder ribbon is completed, the cutting seat 421 is driven by the third driving member 43 to move away from the traction mechanism 2 and reset, exposing the ends of the solder ribbons to facilitate the next round of clamping and fixing by the first clamping assembly 22 or the second clamping assembly 23.

[0056] like Figure 4 and 5 As shown, the strip making mechanism 5 includes a plurality of holding mechanisms 51 respectively arranged on the first placement table 31 and each second placement table 32; the holding mechanism 51 includes a plurality of first pressing blocks 511 for pressing odd-numbered welding strips, a plurality of second pressing blocks 512 for pressing even-numbered welding strips and two first driving components 513, each first pressing block 511 and each second pressing block 512 are alternately staggered, and the holding end movably extends out of the top surface of the first placement table 31 or the top surface of the second placement table 32; the two first driving components 513 respectively drive each first pressing block 511 and each second pressing block 512 to rotate and move downward; the first placement table 31 and the second placement table 32 are provided with a plurality of first avoidance grooves 312 respectively for avoiding each first pressing block 511 and a plurality of second avoidance grooves 313 respectively for avoiding each second pressing block 512.

[0057] Furthermore, the first drive assembly 513 includes a first fixed plate 5131 for supporting each first pressure block 511 or each second pressure block 512, two first connecting rods 5132 parallel to each other, a first support 5133 and a first cylinder 5134, the first support 5133 is connected to the first placement table 31 or the second placement table 32, and the two ends of the first connecting rod 5132 are respectively hinged to the first fixed plate 5131 and the first support 5133; the piston end of the first cylinder 5134 is connected to the first fixed plate 5131.

[0058] During use, driven by the first cylinder 5134 and under the joint action of the two first connecting rods 5132, the first fixing plate 5131 rotates and moves downward, thereby driving each first pressing block 511 or each second pressing block 512 to rotate and move downward together, thereby pressing the welding strip into the corresponding first placement groove 311 or second placement groove 321.

[0059] Among them, the tape making mechanism 5 also includes several second cutting mechanisms 52 for cutting odd-numbered welding tapes and several third cutting mechanisms 53 for cutting even-numbered welding tapes; a second cutting mechanism 52 is arranged between the first placing table 31 and the adjacent second placing table 32 and between two adjacent second placing tables 32, and each second placing table 32 is provided with a third cutting mechanism 53.

[0060] Furthermore, the second cutting mechanism 52 and the third cutting mechanism 53 both include a plurality of cutters 521 arranged side by side and a second drive assembly 522 that drives each cutter 521 to rotate and move downward together; the second placement table 32 is provided with a vertical escape groove 322 that is connected to each second placement groove, and each cutter 521 is movably arranged in the escape groove 322, and the cutter head extends out of the top surface of the second placement table 32. Among them, the second drive assembly 522 has a similar structure to the first drive assembly 513, including a second fixed plate 5221 for supporting each cutter 521, two second connecting rods parallel to each other, a second support and a second cylinder 5222, the second support is connected to the first placement table 31 or the second placement table 32, and the two ends of the second connecting rod are respectively hinged to the second fixed plate 5221 and the second support; the piston end of the second cylinder 5222 is connected to the second fixed plate 5221.

[0061] Among them, the belt making mechanism 5 also includes a distance changing mechanism 54 connected to the two first placing tables 31 and each second placing table 32. The distance changing mechanism 54 can drive each second placing table 32 located on both sides of the center and the first placing table 31 to move relative to the second placing table 32 located in the center, so that the distance between the first placing table 31 and the adjacent second placing table 32 and the distance between the two adjacent second placing tables 32 are adjusted to a preset distance.

[0062] In the present invention, the pitch-changing mechanism 54 is preferably a linear motor, which is provided with a stator and two movers, wherein the stator is connected to the second placement table 32 located in the center, and the two movers are respectively connected to the two first placement tables 31. The first placement table 31 and the adjacent second placement table 32, as well as the two adjacent second placement tables 32, are connected by a pitch-changing slide bar, and one end of the pitch-changing slide bar is fixed and the other end is sliding. In this way, when the linear motor drives the two first placement tables 31 to move toward each other, it drives the second placement tables 32 located on both sides of the center to move toward each other together, while the second placement table 32 located in the center remains stationary, thereby achieving the adjustment of the distance between the first placement table 31 and the adjacent second placement table 32 and between the two adjacent second placement tables 32 to a preset distance, thereby achieving the pitch adjustment between the two axially adjacent sections of the welding strip after cutting.

[0063] like Figure 9 As shown, the present invention also provides a method for pre-treating a solder ribbon for connecting battery cells in series, comprising the following steps:

[0064] S1: Two solder ribbon unwinding mechanisms 1 are used to respectively provide odd-numbered solder ribbons and even-numbered solder ribbons required for series connection of solar cells.

[0065] S2: Using the bidirectional traction mechanism 2, all even-numbered welding ribbons are pulled to a first preset position along a first direction.

[0066] S3: Driven by the lifting drive 61 and the horizontal drive 62, the tape making platform 3 moves horizontally and then moves upward to meet the even-numbered welding ribbons that have reached the first preset position; the tape pressing assembly 41 located on one side of the tape making platform 3 is used to press and hold all the even-numbered welding ribbons; the cutting assembly 42 is used to cut all the even-numbered welding ribbons, and after cutting, the tape pressing assembly 41 is moved toward the tape pressing assembly 41 to expose the ends of the even-numbered welding ribbons to a preset length; during the cutting and moving process of the cutting assembly 42, the tape pressing assembly 41 always keeps pressing the welding ribbons.

[0067] S4: All the even-numbered welding ribbons are pressed and fixed by the pressing mechanism 51 provided on the ribbon making platform 3 ; and the ribbon making platform 3 is moved downward and reset under the drive of the lifting drive member 61 .

[0068] S5: Using the bidirectional traction mechanism 2, all odd-numbered welding ribbons are pulled to a second preset position in a direction opposite to the first direction.

[0069] S6: Driven by the lifting drive 61 and the horizontal drive 62, the tape making platform 3 moves horizontally and then moves upward to meet the odd-numbered welding ribbons that have reached the second preset position; the belt pressing assembly 41 located on the other side of the tape making platform 3 is used to press and hold all the odd-numbered welding ribbons; the cutting assembly 42 is used to cut all the odd-numbered welding ribbons, and after cutting, it moves toward the belt pressing assembly 41 to expose the ends of the odd-numbered welding ribbons to a preset length; similarly, during the cutting and moving process of the cutting assembly 42, the belt pressing assembly 41 always keeps pressing the welding ribbons.

[0070] S7: All odd-numbered welding ribbons are pressed and fixed by the pressing mechanism 51 provided on the ribbon making platform 3; and the ribbon making platform 3 is moved downward and reset under the drive of the lifting drive member 61.

[0071] S8: Use several second cutting mechanisms 52 and several third cutting mechanisms 53 set on the tape making platform 3 to synchronously cut all odd-numbered welding strips and all even-numbered welding strips in sections respectively; use the distance changing mechanism 54 to adjust the distance between the first placement table 31 and the adjacent second placement table 32 and between the two adjacent second placement tables 32 to a preset distance, and then adjust the distance between the two coaxial adjacent welding strips after cutting to the preset distance, thereby completing the welding strip preprocessing.

[0072] The device and method for preprocessing solder strips for series connection of battery cells of the present invention adopt two solder strip unwinding mechanisms 1 for respectively providing odd-numbered solder strips and even-numbered solder strips required for series connection of battery cells, and adopt a bidirectional traction mechanism 2 to alternately traction all even-numbered solder strips to a first preset position and traction all odd-numbered solder strips to a second preset position, so that the solder strip feeding efficiency is high and the feeding position accuracy is high.

[0073] At the same time, the tape making platform 3 is moved upward to receive all the even-numbered welding strips moved to the first preset position or the odd-numbered welding strips moved to the second preset position. After the tape making platform 3 receives all the welding strips and resets, the tape making mechanism 5 is used to synchronously cut all the odd-numbered welding strips and all the even-numbered welding strips on the tape making platform 3 in sections, and the distance between the two axially adjacent sections of welding strips after cutting is adjusted to the preset distance. The welding strip cutting accuracy is high, and the length consistency of the welding strips at each end after cutting is good, which is beneficial to improving the product quality of the battery assembly.

[0074] In addition, after the tape making platform 3 moves upward to meet and contact the even-numbered welding ribbons that have arrived at the first preset position or the odd-numbered welding ribbons that have arrived at the second preset position, the tape pressing assembly 41 is first used to press all the even-numbered welding ribbons or all the odd-numbered welding ribbons, and then the cutting assembly 42 is used to cut all the odd-numbered welding ribbons, and after cutting, it moves toward the tape pressing assembly 41 so that the end of the welding ribbon to be pulled to the tape making platform 3 is exposed to the preset length, and the pre-cutting accuracy of the welding ribbon is high.

[0075] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A device for pre-treating solder strips for connecting cells in series, characterized in that: It comprises two welding strip unwinding mechanisms (1), a bidirectional traction mechanism (2), a strip making platform (3), two first cutting mechanisms (4) and a strip making mechanism (5); The two soldering ribbon unwinding mechanisms (1) are respectively used to provide the odd-numbered soldering ribbons and the even-numbered soldering ribbons required for the series connection of the battery cells; The bidirectional traction mechanism (2) is located between the two welding ribbon unwinding mechanisms (1), and is capable of alternately traction of all even-numbered welding ribbons to a first preset position and traction of all odd-numbered welding ribbons to a second preset position; The strip making platform (3) is located below the bidirectional traction mechanism (2), and has a plurality of strip grooves (30) spaced apart on its top surface, and can be moved upward to accommodate the even-numbered strips that have reached the first preset position or the odd-numbered strips that have reached the second preset position, so that they enter the corresponding strip grooves (30); the strip making platform (3) comprises two first placement platforms (31) spaced apart and a plurality of second placement platforms (32) sequentially arranged between the two first placement platforms (31); the top surface of the first placement platform (31) is provided with a plurality of first placement grooves (311) with both ends through it, and the top surface of the second placement platform (32) is provided with a plurality of second placement grooves (321) that are aligned with and through each of the first placement grooves (311); the two first placement grooves (311) and a plurality of second placement grooves (321) that are coaxially connected constitute the strip grooves (30); The two first cutting mechanisms (4) are respectively arranged between the bidirectional traction mechanism (2) and the two welding ribbon unwinding mechanisms (1), and are used to cut all even-numbered welding ribbons entering the ribbon making platform (3) and all odd-numbered welding ribbons entering the ribbon making platform (3), and to adjust after cutting so that the ends of the welding ribbons to be entered into the ribbon making platform (3) are exposed to a preset length; The strip making mechanism (5) is located on the strip making platform (3) and is capable of cutting all even-numbered welding strips and odd-numbered welding strips located in each welding strip groove (30) into sections with preset lengths, and adjusting the distance between two axially adjacent welding strip sections after cutting to a preset distance.

2. The device for pre-treating solder strips for connecting cells in series according to claim 1, characterized in that: The bidirectional traction mechanism (2) comprises a slide (21), a plurality of first clamping assemblies (22) for clamping odd-numbered welding strips, a plurality of second clamping assemblies (23) for clamping even-numbered welding strips, and a slide driving member; driven by the slide driving member, the slide (21) slides back and forth between the two welding strip unwinding mechanisms (1); each of the first clamping assemblies (22) and each of the second clamping assemblies (23) are arranged on the slide (21) and are alternately staggered along a sliding direction perpendicular to the slide (21).

3. The device for pre-treating solder strips for connecting cells in series according to claim 1, characterized in that: The strip making mechanism (5) comprises a plurality of holding mechanisms (51) respectively arranged on the first placement platform (31) and each of the second placement platforms (32); the holding mechanisms (51) comprise a plurality of first pressing blocks (511) for holding odd-numbered welding strips, a plurality of second pressing blocks (512) for holding even-numbered welding strips, and two first driving components (513), wherein each of the first pressing blocks (511) and each of the second pressing blocks (512) are alternately staggered, and the holding ends are movably extended out of the first pressing blocks (511) and the second pressing blocks (512). The top surface of the first placement table (31) or the top surface of the second placement table (32); the two first drive components (513) respectively drive each first pressing block (511) and each second pressing block (512) to rotate and move downward; the first placement table (31) and the second placement table (32) are provided with a plurality of first avoidance grooves (312) respectively for avoiding each first pressing block (511) and a plurality of second avoidance grooves (313) respectively for avoiding each second pressing block (512).

4. The device for pre-treating solder strips for connecting cells in series according to claim 3, characterized in that: The first driving assembly (513) includes a first fixed plate (5131) for supporting each first pressure block (511) or each second pressure block (512), two first connecting rods (5132) parallel to each other, a first support (5133) and a first cylinder (5134), wherein the first support (5133) is connected to the first placement platform (31) or the second placement platform (32), and the two ends of the first connecting rod (5132) are hinged to the first fixed plate (5131) and the first support (5133) respectively; and the piston end of the first cylinder (5134) is connected to the first fixed plate (5131).

5. The device for pre-treating solder strips for connecting cells in series according to claim 3, characterized in that: The strip making mechanism (5) further comprises a plurality of second cutting mechanisms (52) for cutting odd-numbered welding strips and a plurality of third cutting mechanisms (53) for cutting even-numbered welding strips; the second cutting mechanism (52) is provided between the first placement table (31) and the adjacent second placement table (32) and between two adjacent second placement tables (32), and each second placement table (32) is provided with the third cutting mechanism (53); The second cutting mechanism (52) and the third cutting mechanism (53) both include a plurality of cutters (521) arranged side by side and a second driving assembly (522) for driving the cutters (521) to rotate and move downward together; the second placement table (32) is provided with a vertical avoidance groove (322) that is connected to the second placement grooves, and each cutter (521) is movably arranged in the avoidance groove (322), and the cutter head extends out of the top surface of the second placement table (32).

6. The device for pre-treating solder strips for connecting cells in series according to claim 5, characterized in that: The second driving assembly (522) comprises a second fixed plate (5221) for supporting each of the cutters (521), two second connecting rods parallel to each other, a second support and a second cylinder (5222), wherein the second support is connected to the first placement table (31) or the second placement table (32), and the two ends of the second connecting rod are hinged to the second fixed plate (5221) and the second support respectively; and the piston end of the second cylinder (5222) is connected to the second fixed plate (5221).

7. The device for pre-treating solder strips for connecting cells in series according to claim 5, characterized in that: The belt making mechanism (5) further includes a distance-changing mechanism (54) connected to the two first placement platforms (31) and each second placement platform (32). The distance-changing mechanism (54) can drive each second placement platform (32) located on both sides of the center and the first placement platform (31) to move relative to the second placement platform (32) located in the center, so that the distance between the first placement platform (31) and the adjacent second placement platform (32) and the distance between two adjacent second placement platforms (32) are adjusted to a preset distance.

8. The device for pre-treating solder strips for connecting cells in series according to claim 1, characterized in that: The first cutting mechanism (4) comprises a belt pressing assembly (41) and a cutting assembly (42) arranged side by side; The belt pressing assembly (41) includes a belt pressing seat (411), a plurality of pressure heads (412) and a plurality of first driving members (413); the belt pressing seat (411) is provided with a plurality of first guide grooves (4111) which are aligned and connected with the respective welding belt grooves (30); the respective pressure heads (412) are located above the respective first guide grooves (4111) and can move up and down under the drive of the respective first driving members (413); The cutting assembly (42) comprises a cutting seat (421), a driving plate (422), a pressing plate (4221), a cutting knife (423) and a second driving member (424); the cutting seat (421) is slidably arranged relative to the belt pressing seat (411) and is provided with a plurality of second guide grooves (4211) respectively aligned with and connected to each of the welding belt grooves (30) and each of the first guide grooves (4111); the driving plate (422) is located above each of the second guide grooves (4211) and is capable of moving up and down under the drive of the second driving member (424); the pressing plate (4221) is connected to the bottom of the driving plate (422) via a group of springs; the cutting knife (423) is located at one end of each of the second guide grooves (4211) facing the bidirectional traction mechanism (2) and is connected to the driving plate (422).

9. A method for pre-treating solder strips for connecting battery cells in series, characterized in that: The following steps are involved: S1: Two solder ribbon unwinding mechanisms (1) are used to respectively provide the odd-numbered solder ribbons and the even-numbered solder ribbons required for connecting the battery cells in series; S2: using a bidirectional traction mechanism (2) to pull all even-numbered welding ribbons to a first preset position along a first direction; S3: the strip making platform (3) moves upward to meet the even-numbered strips that have reached the first preset position; all the even-numbered strips are pressed by the strip pressing assembly (41) located on one side of the strip making platform (3); all the even-numbered strips are cut by the cutting assembly (42), and after cutting, the strips are moved toward the strip pressing assembly (41) so that the ends of the even-numbered strips are exposed to a preset length; S4: Using the holding mechanism (51) provided on the strip making platform (3) to hold and fix all the even-numbered strips; the strip making platform (3) moves downward and resets; S5: using a bidirectional traction mechanism (2) to pull all odd-numbered welding ribbons to a second preset position in a direction opposite to the first direction; S6: the strip making platform (3) moves upward to meet the odd-numbered strips that have reached the second preset position; all the odd-numbered strips are pressed by the strip pressing assembly (41) located on the other side of the strip making platform (3); all the odd-numbered strips are cut by the cutting assembly (42), and after cutting, the strips are moved toward the strip pressing assembly (41) so that the ends of the odd-numbered strips are exposed to a preset length; S7: Using the holding mechanism (51) provided on the strip making platform (3) to hold and fix all the odd-numbered welding strips; the strip making platform (3) moves downward and resets; S8: using a plurality of second cutting mechanisms (52) and a plurality of third cutting mechanisms (53) provided on the strip making platform (3) to synchronously cut all odd-numbered welding strips and all even-numbered welding strips in sections; using a distance-changing mechanism (54) to adjust the distance between the coaxially adjacent welding strips at both ends after cutting to a preset distance, thereby completing the welding strip preprocessing.

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