Comb belt structure, welding platform, stitch welding machine, welding method and program product

Abstract

The invention relates to the field of photovoltaic manufacturing, in particular to a comb belt structure, a welding platform, a stitch welding machine, a welding method and a program product. The comb belt structure is provided with a plurality of comb tooth blocks which are arranged at intervals along a straight line, a guide groove is formed between every two adjacent comb tooth blocks, and the guide grooves are used for guiding welding belts of battery pieces close to the battery piece comb belt structure so as to arrange the welding belts. The strip combing structure is arranged on one side of a welding station, the guide groove is located at an ideal station when the welding strip is welded, when a battery piece moves to be close to the welding station, the battery piece welding strip is guided by the guide groove to be uniformly combed, and the welding strip which is originally bent or is not located at the ideal position is combed to be neatly arranged; therefore, the welding strips can be neatly arranged on the bus bar, the phenomena of solder skips and insufficient solder caused by the fact that the welding strips are not neat are effectively avoided, the welding quality of the welding strips and the bus bar is improved, and the welding efficiency is also improved.

Description

Technical Field

[0001] The present application relates to the field of photovoltaic manufacturing, and relates to a comb strip structure, a welding platform, a stack welding machine, a welding method and a program product. Background Art

[0002] In the manufacturing process of photovoltaic modules, the welding of the cell solder strips (also known as interconnection solder strips) and the busbars is one of the core process links, which directly affects the electrical performance output, mechanical strength and long-term reliability of the modules. The solder strips usually adopt tinned copper strip materials, and the front electrodes and back electrodes of adjacent cells are connected in series through the welding process to form a current path; the busbars undertake the function of current collection, and after connecting multiple strings of cells in series and parallel, they are connected to the junction box. Traditional processes mostly adopt hot air welding or infrared welding technology, and form a metallurgical bond by heating the silver paste at the main grid line of the solder strip and the busbar, and at the same time stack and weld the busbar and the solder strip.

[0003] Since the solder strips are arranged in rows on the cells and protrude to one side of the cells, during welding, as the cells move, the rows of solder strips need to contact the busbars on the welding station. If the solder strips have uneven phenomena such as bending or offset, the solder strips cannot contact the busbars, or the solder strips are not arranged uniformly on the busbars, resulting in the welding head not being able to contact the solder strips, or the welding position being unsatisfactory, which in turn affects the welding quality, resulting in phenomena such as virtual welding and missed welding, and the product being unqualified. Therefore, there is an urgent need for a structure or device that can comb the solder strips before welding to make the solder strips arranged neatly. Summary of the Invention

[0004] To solve or at least partially solve the above technical problems, the present application provides a comb strip structure, including:

[0005] A plurality of comb tooth blocks arranged at intervals along a straight line, and a guiding groove is formed between two adjacent comb tooth blocks;

[0006] The guiding groove is used to guide the solder strips of the cells approaching the comb strip structure to arrange the solder strips.

[0007] Optionally, one side of the comb tooth block facing the guiding groove has a first side wall;

[0008] The distance between two opposite first side walls of adjacent comb tooth blocks gradually decreases in the direction from the top of the guiding groove to the bottom of the guiding groove to guide the solder strips to the bottom of the guiding groove.

[0009] Optionally, one side of the comb tooth block facing the guiding groove has a second side wall, the second side wall is connected to the first side wall, and the second side wall is closer to the bottom of the guiding groove than the first side wall;

[0010] The first side wall is used to guide the solder tape to one side of the second side wall.

[0011] Optionally, the second side wall extends in the direction of the bottom of the guiding groove, and two opposite second side walls between adjacent comb teeth blocks intersect with each other.

[0012] Optionally, the surfaces of the second side wall and the first side wall are both flat planes, and the slope of the second side wall is different from the slope of the first side wall.

[0013] Optionally, the second side wall extends to the bottom of the guiding groove, the distances between two opposite second side walls between adjacent comb teeth blocks are equal, and the distance therebetween is greater than the width of the solder tape.

[0014] Optionally, the second side wall includes:

[0015] A first wall segment connecting the first side wall;

[0016] A second wall segment extending from the first wall segment to the bottom of the guiding groove, and two opposite second wall segments between adjacent comb teeth blocks intersect with each other;

[0017] The second wall segment is arranged at an angle with the first wall segment.

[0018] Optionally, the distances between two opposite first wall segments between adjacent comb teeth blocks are equal, and the distance between the two first wall segments is greater than the width of the solder tape.

[0019] Optionally, the second side wall is a conductor, and two opposite second side walls between adjacent comb teeth blocks are insulated from each other;

[0020] When the two second side walls are in contact with the solder tape at the same time, a circuit is formed through the solder tape to generate a feedback signal for feedbacking the alignment of the solder tape.

[0021] Optionally, the comb tooth block has a third side wall, and the third side wall is arranged on one side in the extending direction of the guiding groove and is connected to the first side wall;

[0022] The distances between two adjacent third side walls between adjacent comb teeth blocks gradually increase from the inside of the guiding groove to the outside of the guiding groove, so as to guide the solder tape outside the guiding groove to the first side wall.

[0023] Optionally, a first positioning groove is arranged at the bottom of the guiding groove, the width of the first positioning groove is smaller than the minimum width of the guiding groove and greater than the width of the solder tape, and the guiding groove is used to guide the solder tape into the first positioning groove.

[0024] Optionally, a second positioning groove is provided at the bottom of the first positioning groove. The first positioning groove is used to guide the welding tape into the second positioning groove. The width of the second positioning groove is at least partially smaller than the width of the welding tape to limit the welding tape.

[0025] Optionally, the battery cell comb tape structure includes:

[0026] Two sets of comb tooth assemblies arranged in pairs;

[0027] A support plate connected between the two sets of comb tooth assemblies. The support plate is used to support the bus bar;

[0028] Each set of comb tooth assemblies includes a plurality of comb tooth blocks arranged at intervals along a straight line.

[0029] Optionally, one side of each comb tooth block close to the other set of comb tooth assemblies has a fourth side wall. The distance between the two opposite fourth side walls between the two sets of comb tooth assemblies gradually decreases from the top to the bottom of the comb tooth block to guide the bus bar to the support plate.

[0030] Optionally, the battery cell comb tape structure further includes:

[0031] A base provided at the bottoms of the plurality of comb tooth blocks,

[0032] A connecting seat provided on one side of the base along the arrangement direction of the comb tooth blocks;

[0033] A connecting member detachably connected to the connecting seat for mounting the connecting seat on an external platform;

[0034] The connecting member is in sliding fit with the connecting seat so that the connecting seat can move and adjust along the extension direction of the base.

[0035] The present application provides a battery cell welding platform, including:

[0036] A platform body;

[0037] A welding assembly provided on the surface of the platform body. The welding assembly forms a welding station in the area above it;

[0038] The comb tape structure as described above. The battery cell comb tape structure is provided on the surface of the platform body and is arranged adjacent to the welding assembly;

[0039] The comb tape structure is used to arrange the welding tape passing through the guiding groove on the welding station.

[0040] The present application provides a stack welding machine, including a frame and the following components respectively installed on the frame:

[0041] The battery cell welding platform as described above;

[0042] A first handling mechanism for transporting a bus bar to a welding station of the battery cell welding platform;

[0043] A second handling mechanism for transporting battery cells close to the battery cell welding platform, so that the welding tapes of the battery cells are arranged on the upper surface of the bus bar under the guidance of the battery cell tape combing structure;

[0044] The battery cell welding platform is used to weld the bus bar and the welding tape.

[0045] The present application also provides a welding method for battery cells, including:

[0046] Setting a bus bar on one side of a plurality of comb teeth blocks arranged at intervals along a straight line;

[0047] Moving a plurality of welding tapes on at least one side of the battery cell to near the comb teeth blocks;

[0048] Moving the battery cell so that the welding tape moves towards the comb teeth blocks, and under the guidance of the guiding grooves of the comb teeth blocks, moving the welding tape into the guiding grooves, so that the comb teeth blocks support the welding tape and contact the bus bar;

[0049] Welding the bus bar and the welding tape.

[0050] Optionally, before the step of welding the bus bar and the welding tape, it further includes:

[0051] Responding to the in-place feedback signal generated by the contact conduction of the welding tape with the two side walls of the guiding groove, stopping the movement of the battery cell.

[0052] The present application also provides a computer program product provided with a computer program, and when the computer program is executed, it can implement the steps of the method as described above.

[0053] The comb strip structure provided by this application forms guiding grooves between adjacent comb tooth blocks which are arranged at intervals along a straight line. The guiding grooves are used to guide the welding tapes of the solar cells approaching the solar cell comb strip structure so as to arrange the welding tapes. The solar cell comb strip structure is arranged on one side of the welding station, and the guiding grooves are located at the ideal positions of the welding tapes during welding. When the solar cells move closer to the welding station, the welding tapes of the solar cells are uniformly combed through the guidance of the guiding grooves, and the originally bent or misaligned welding tapes are combed to be neatly arranged, so that the welding tapes can be neatly arranged on the bus bar, ensuring the welding quality between the welding tapes and the bus bar and improving the welding efficiency.

[0054] The solar cell welding platform and the stack welding machine provided by this application also have the above-mentioned advantages because they include the above-mentioned solar cell comb strip structure, and will not be elaborated here.

[0055] The welding method of the solar cells provided by this application enables the welding tapes of the solar cells to be neatly arranged and then welded to the bus bar through the guidance of the guiding grooves of the comb tooth blocks, and also has the above-mentioned advantages.

[0056] The computer program product provided by this application also has the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] To more clearly illustrate the implementation manners of this application, the related drawings will be briefly introduced below. It can be understood that the drawings in the following description are only used to illustrate some implementation manners of this application, and those of ordinary skill in the art can also obtain many other technical features and connection relationships not mentioned in this text based on these drawings.

[0058] Figure 1 It is a schematic structural diagram of an embodiment of the solar cell comb strip structure of this application;

[0059] Figure 2 It is a schematic cross-sectional view of an embodiment of the solar cell comb strip structure of this application;

[0060] Figure 3 It is a schematic cross-sectional view of an embodiment of the solar cell comb strip structure of this application;

[0061] Figure 4 It is a schematic cross-sectional view of an embodiment of the solar cell comb strip structure of this application;

[0062] Figure 5 It is an enlarged schematic cross-sectional view of an embodiment of the solar cell comb strip structure of this application;

[0063] Figure 6 It is a schematic structural diagram of an embodiment of the solar cell comb strip structure of this application;

[0064] Figure 7 Schematic diagram of a structure of an embodiment of the battery chip comb belt structure of the present application;

[0065] Figure 8 Usage state diagram of an embodiment of the battery chip comb belt structure of the present application;

[0066] Figure 9 Enlarged schematic diagram of an embodiment of the battery chip welding platform of the present application;

[0067] Figure 10 Flow chart of the steps of the battery chip welding method of the present application.

[0068] Explanation of reference numerals:

[0069] 10. Comb tooth block; 101. First side wall; 102. Second side wall; 1021. First wall section; 1022. Second wall section; 103. Third side wall; 104. Fourth side wall;

[0070] 11. Guide groove; 111. First positioning groove; 112. Second positioning groove; 12. Support plate; 13. Base; 14. Connection seat; 15. Connecting piece;

[0071] 20. Welding tape; 30. Battery chip; 40. Bus bar; 50. Platform body; 51. Welding assembly. Detailed implementation manners

[0072] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0073] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0074] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0075] Next, the technical solutions in the embodiments of the present application will be described in detail with reference to the accompanying drawings in the embodiments of the present application.

[0076] Embodiment 1

[0077] As Figure 1 shown, this embodiment provides a comb belt structure for battery wafers. The structure is composed of a plurality of comb tooth blocks 10. Among them, the plurality of comb tooth blocks 10 are arranged at intervals along a straight line, and a guiding groove 11 is formed between two adjacent comb tooth blocks 10. The plurality of comb tooth blocks 10 can share a long strip-shaped base 13 to maintain the relative fixation between the comb tooth blocks  10.

[0078] When the comb belt structure of the battery wafer in this embodiment is placed horizontally, the guiding groove 11 opens upward, and the left and right sides of the guiding groove 11 are through. When the welding tape 20 of the battery wafer 30 approaches the guiding groove 11, the guiding groove 11 contacts the welding tape 20, and the guiding groove 11 can squeeze the welding tape 20, so as to deform the welding tape 20 to a certain extent to adjust the welding tape 20.

[0079] The relative positions between the plurality of comb tooth blocks 10 are fixed. By designing the reasonable dimensions between the comb tooth blocks 10, that is, controlling the width of the guiding groove 11, when the plurality of welding tapes 20 on one side of the battery wafer 30 are placed in the guiding groove 11 (the arrow in the figure indicates the placing direction), the comb tooth blocks 10 arranged according to the expected dimensions or positions squeeze the welding tape 20, and the guiding groove 11 guides the welding tape 20, so as to arrange the welding tape 20 according to the expected requirements.

[0080] In this way, the welding tapes 20 that are irregularly arranged, bent, or not in the expected positions are sorted out, so that the welding tapes 20 on one side of the battery wafer 30 are neatly arranged. Furthermore, when the welding tapes 20 are welded to the bus bar 40, the welding tapes 20 and the bus bar 40 are in the expected contact positions, which can improve the welding quality of the two, avoid phenomena such as virtual welding and missed welding, and thus improve the product quality and processing efficiency of the battery wafer.

[0081] As Figure 2As shown, one side of the comb tooth block 10 of this embodiment facing the guiding groove 11 has a first side wall 101, and the opposite sides of the comb tooth block 10 each have a first side wall 101. The distance between the two opposite first side walls 101 of adjacent comb tooth blocks 10 gradually decreases in the direction from the top to the bottom of the guiding groove 11. That is to say, the comb tooth block 10 is a tapered structure that is smaller at the top and larger at the bottom, and the guiding groove 11 is a flared groove with an upward opening. When the solder strip 20 is placed into the guiding groove 11 from top to bottom, the solder strip 20 contacts the inclined first side wall 101, and under the guidance of the first side wall 101, the solder strip 20 moves towards the bottom of the guiding groove 11. At this time, the skewed solder strip 20 can be corrected.

[0082] Further, in one embodiment, one side of the comb tooth block 10 facing the guiding groove 11 has a second side wall 102. The second side wall 102 is connected to the first side wall 101, and the second side wall 102 is closer to the bottom of the guiding groove 11 than the first side wall 101. The second side wall 102 is also arranged in pairs like the first side wall 101.

[0083] In this embodiment, the distance between the two opposite first side walls 101 is greater than the distance between the two opposite second side walls 102, and the distance between the two second side walls 102 is greater than the width of the solder strip 20. When the solder strip 20 is placed into the guiding groove 11 from top to bottom, the solder strip 20 first contacts the first side wall 101, moves towards the second side wall 102 under the guidance of the first side wall 101, and falls to one side of the second side wall 102, that is, falls between the two second side walls 102.

[0084] It should be noted that the opening range of the first side wall 101 of this embodiment is large and is used to contact the skewed solder strip 20. Then, as the solder strip 20 continues to move downward, the solder strip 20 is guided to one side of the second side wall 102. The range involved by the first side wall 101 only needs to be able to collect the skewed solder strip 20. The positions or distances of multiple first side walls 101 can be irregular; while the second side wall 102 is arranged at the expected position where the solder strip 20 needs to be arranged. When the first side wall 101 guides the solder strip 20 to the second side wall 102, the solder strip 20 is corrected.

[0085] In one embodiment, as Figure 2As shown, the second side wall 102 extends towards the bottom direction of the guiding groove 11, and two second side walls 102 that are opposite to each other between adjacent comb teeth blocks 10 intersect. In this way, when the solder strip 20 moves downward to contact the two second side walls 102, it is supported and fixed by the two second side walls 102, so as to ensure that the solder strip 20 is in a fixed state after being corrected and prevent the solder strip 20 from deforming. This state can be maintained until the solder strip 20 is welded to the bus bar 40, which can play a role in maintaining the position of the solder strip 20 in the state of being heated or extruded during welding and prevent it from deforming again during the welding process and affecting the welding quality.

[0086] In the above embodiment, the two second side walls 102 intersect, realizing the limit for solder strips 20 with different widths and ensuring the stability of the solder strip 20 between the second side walls 102.

[0087] As Figure 2 shown, the surfaces of the second side wall 102 and the first side wall 101 are both flat planes, ensuring that the solder strip 20 can be smoothly guided. The slopes of the second side wall 102 and the first side wall 101 are different, which can be freely set according to actual needs. Among them, the larger the angle between the first side wall 101 and the vertical plane, the larger the opening angle, which is convenient for collecting the skewed solder strip 20. The smaller the angle between the second side wall 102 and the vertical plane, the more stable the fixing of the solder strip 20.

[0088] Of course, in one embodiment, the slope of the second side wall 102 is the same as that of the first side wall 101, that is, the second side wall 102 and the first side wall 101 are in the same plane. At this time, as in the case of only the first side wall 101 mentioned above, since the effects are the same, it will not be elaborated here.

[0089] As Figure 3 shown, in one embodiment, the second side wall 102 extends to the bottom of the guiding groove 11, and the distances between two second side walls 102 that are opposite to each other between adjacent comb teeth blocks 10 are equal, and the distance between the two second side walls 102 is greater than the width of the solder strip 20. In this embodiment, the distance between the two second side walls 102 is slightly greater than the width of the solder strip 20, which is required to ensure that the solder strip 20 can fall between the two second side walls 102. At the same time, the two second side walls 102 limit the solder strip 20 and keep the solder strip 20 at the expected position after correction.

[0090] As Figure 4 shown, in one embodiment, the second side wall 102 is divided into upper and lower ends, including a first wall segment 1021 and a second wall segment 1022; the first wall segment 1021 is connected to the first side wall 101, the second wall segment 1022 extends from the first wall segment 1021 to the bottom of the guiding groove 11, two second wall segments 1022 that are opposite to each other between adjacent comb teeth blocks 10 intersect, and the second wall segment 1022 is arranged at an angle with the first wall segment 1021.

[0091] In this embodiment, the first wall segment 1021 functions the same as the first side wall 101 described above, and can guide the solder tape 20 to the second wall segment 1022. The second wall segment 1022 functions the same as the two intersecting second side walls 102 mentioned in the above embodiment, and details will not be elaborated here. Figure 2 In the above embodiment

[0092] Furthermore, as Figure 4 shown, the distances between two opposite first wall segments 1021 of adjacent comb teeth blocks 10 are equal to each other, and the distance between the two first wall segments 1021 is greater than the width of the solder tape 20. In this embodiment, the gaps between the two first wall segments 1021 and the gaps between the two second wall segments 1022 also function to limit the corrected solder tape 20. Since multiple solder tapes 20 are arranged in a row on one side of the battery cell 30, it is difficult to keep all the solder tapes 20 on the same horizontal line when moving or welding the battery cell 30. Therefore, when allowing the solder tape 20 to have a small amplitude of undulation, the first wall segment 1021 and the second wall segment 1022 respectively function to limit the solder tape 20 that is not on the same horizontal line. Among them, the distance between the two first wall segments 1021 is slightly wider than the width of the solder tape 20, and the solder tape 20 is not stuck between the two first wall segments 1021, and its small lateral movement is within the expected position of the curve of the solder tape 20, which also functions to limit the position.

[0093] In some embodiments, as Figure 4 shown, a first positioning groove 111 is provided at the bottom of the guiding groove 11. The width of the first positioning groove 111 is smaller than the minimum width of the guiding groove 11 and greater than the width of the solder tape 20. The guiding groove 11 is used to guide the solder tape 20 into the first positioning groove 111. The first positioning groove 111 functions to position the solder tape 20.

[0094] Furthermore, a second positioning groove 112 is provided at the bottom of the first positioning groove 111. The first positioning groove 111 is used to guide the solder tape 20 into the second positioning groove 112. The width of the second positioning groove 112 is at least partially smaller than the width of the solder tape 20 to limit the solder tape 20.

[0095] The inner wall of the first positioning groove 111 in this embodiment can be understood as the two first wall segments 1021 described above, and the inner wall of the second positioning groove 112 can be understood as the two second wall segments 1022 described above. Therefore, the first positioning groove 111 and the second positioning groove 112 have the same effects as the first wall segment 1021 and the second wall segment 1022 described above.

[0096] Of course, the inner walls of the first positioning groove 111 and the second positioning groove 112 are not limited to being planar, and can also be other shapes, as long as they can guide and limit the solder tape 20.

[0097] The battery cell combing tape structure provided by the present application guides the welding tape 20 through the first side wall 101 and the second side wall 102, as well as the first wall section 1021 and the second wall section 1022 respectively, so as to arrange the welding tape 20. The battery cell combing tape structure is arranged on one side of the welding station, and the guiding groove 11 is located at the expected station of the welding tape 20 during welding. When the battery cell 30 moves closer to the welding station, the welding tape 20 of the battery cell 30 is combed through the guidance of the above side walls, and the welding tape 20 that was originally bent or not in the ideal position is combed to be neatly arranged, so that the welding tape 20 can be neatly arranged on the bus bar 40, ensuring the welding quality of the welding tape 20 and the bus bar 40, improving the welding efficiency, and playing a significant role in the welding operation of the welding tape 20 and the bus bar 40.

[0098] Embodiment 2

[0099] This embodiment provides a battery cell combing tape structure, which is the same as the structure in the above Embodiment 1 and is further improved on the basis of the above embodiment.

[0100] The inventor found that since the welding tape 20 is vertically placed into the battery cell combing tape structure by the handling mechanism, if the stroke of the handling mechanism is too short, the welding tape 20 will not be placed at the bottom of the guiding groove 11, resulting in poor correction effect; if the stroke of the handling mechanism is too long, the welding tape 20 will excessively squeeze the bottom of the guiding groove 11, causing the welding tape 20 to bend and affecting welding. In order to accurately determine whether the welding tape 20 has moved to contact the bottom of the guiding groove 11 and achieve the best correction effect of the welding tape 20, this embodiment further improves the inner wall of the guiding groove 11.

[0101] As Figure 5 shown, in one embodiment, the second side wall 102 is made of a conductor material, and the two second side walls 102 that are opposite to each other between adjacent comb teeth blocks 10 are insulated from each other; at the same time, the two second side walls 102 are connected to a controller or a feedback mechanism through a circuit. When the welding tape 20 descends and contacts the two second side walls 102 at the same time, the welding tape 20 reaches the expected position and is supported by the two second side walls 102. The two second side walls 102 are electrically connected through the welding tape 20 to form a circuit, and the circuit generates a feedback signal. The feedback signal is sent to the controller through the circuit for feedback that the welding tape 20 is arranged in place. The controller can control the feedback mechanism, such as the handling mechanism, to indicate that the handling mechanism has reached the ideal position, stop running, and keep the welding tape 20 at this position, effectively avoiding the problems of the welding tape 20 not contacting the second side wall 102 and being not corrected in place, and the welding tape 20 being bent due to excessive descent, realizing the intelligent control of the handling of the welding tape 20.

[0102] In some embodiments, the second side wall 102 having electrical conductivity can be such asFigure 4 The second wall segment 1022 shown can also be the first side wall 101 near the bottom of the guiding groove 11. In some embodiments where only the first side wall 101 is provided, the bottom portion of the first side wall 101 has a conductive function. The solder strip 20 is guided by the first side wall 101 to the bottom of the first side wall 101, supported by the bottom portion of the first side wall 101, and forms a circuit.

[0103] Furthermore, the feedback signal can also be sent to the welding system. After receiving the feedback signal, the welding system determines that the solder strip 20 has entered the welding station and waits for welding. At this time, the welding system is activated to weld the bus bar 40 and the solder strip 20, thereby improving the welding efficiency.

[0104] In this embodiment, the scheme of forming a circuit by the two second side walls 102 in contact with the solder strip 20 and generating a feedback signal provides feedback on the correction and welding positioning of the solder strip 20 simultaneously, making the handling process and welding process of the battery cell 30 related and improving the processing efficiency of the battery cell.

[0105] In some embodiments, an induction device can also be provided at the bottom of the guiding groove 11 or on the surface of the second side wall 102. When the solder strip 20 is guided to the bottom of the guiding groove 11 or the surface of the second side wall 102, the induction device is triggered, thereby determining that the solder strip 20 has moved into place and generating a feedback signal. The induction device is electrically connected to a corresponding controller or feedback mechanism to control the corresponding actions of the feedback mechanism or activate the welding system for welding.

[0106] Embodiment 3

[0107] This embodiment provides a battery cell comb strip structure, which is further improved based on the above Embodiment 1 or 2.

[0108] In the above Embodiment 1, the opening direction of the first side wall 101 faces upward, and the solder strip 20 is placed into the guiding groove 11 from above the guiding groove 11. In this embodiment, as Figure 6 shown, the comb tooth block 10 further has a third side wall 103, which is provided on one side in the extending direction of the guiding groove 11 and is connected to the first side wall 101. The distance between the two third side walls 103 of adjacent comb tooth blocks 10 that are close to each other gradually increases from the inside to the outside of the guiding groove 11.

[0109] That is to say, the two third side walls 103 open towards the horizontal side of the guiding groove 11. The third side walls 103 are located on one side of the guiding groove 11 and are inclined. Please refer to Figure 6, when the solder strip 20 moves horizontally from outside the guiding groove 11 towards the guiding groove 11 (in the direction indicated by the arrow in the figure), the head of the solder strip 20 contacts the third side wall 103 and is guided by the third side wall 103 to the first side wall 101, playing a preliminary rectifying and combing role. Subsequently, the solder strip 20 continues to descend and is corrected by the first side wall 101. The correction process regarding the first side wall 101 is as described in the above embodiment and will not be elaborated here.

[0110] In this embodiment, the setting of the third side wall 103 enables the solder strip 20 not only to move vertically downward from above towards the comb teeth block 10, but also to move horizontally. By moving horizontally, the solder strip 20 is inserted into the guiding groove 11 and then moves downward. Such a setting reduces the positioning requirement of the handling mechanism in the vertical direction. As long as the solder strip 20 is moved close to the vicinity of the comb teeth block 10, the handling mechanism can achieve the combing operation through horizontal or vertical adjustment, improving the fault tolerance rate of the handling mechanism and making the movement adjustment of the solder strip 20 more flexible.

[0111] Embodiment 4

[0112] This embodiment provides a battery cell combing structure. The battery cell combing structure includes two sets of comb teeth assemblies arranged in pairs. Each set of comb teeth assemblies includes a plurality of comb teeth blocks 10 arranged at intervals along a straight line. This battery cell combing structure can comb the solder strips 20 of different battery cells 30 on both sides.

[0113] As Figure 7 and Figure 8 shown, a plurality of comb teeth blocks 10 are arranged in two rows along a straight line. The two rows of comb teeth blocks 10 are arranged in parallel, and a gap is formed therebetween. A support plate 12 is arranged between the two rows of comb teeth blocks 10. The support plate 12 is a strip-shaped plate and is used to support the bus bar 40.

[0114] As Figure 7 shown, one side of each comb teeth block 10 close to the other row of comb teeth assemblies has a fourth side wall 104. The distance between the two fourth side walls 104 opposite to each other between the two rows of comb teeth assemblies gradually decreases from the top to the bottom of the comb teeth block 10 for guiding the bus bar 40 onto the support plate 12.

[0115] In this embodiment, the support plate 12 is located at a position close to the bottom of the guiding groove 11. When the solder strip 20 moves close to the bottom of the guiding groove 11, the part of the solder strip 20 extending out of the guiding groove 11 just overlaps on the bus bar 40 and waits for welding in this state.

[0116] Preferably, anti-slip grooves are provided on the support plate 12 to prevent the movement of the bus bar 40.

[0117] In this embodiment, the bottom of the comb tooth block 10 has a base 13, and the base 13 fixedly connects multiple comb tooth blocks 10. A connecting seat 14 is arranged on one side of the base 13. The connecting seat 14 is in a strip structure and is arranged on one side of the base 13 along the arrangement direction of the comb tooth blocks 10. Both sides of the battery cell comb strip structure in this embodiment have connecting seats 14 and are detachably installed on an external platform through a connecting member 15.

[0118] As Figure 7 shown, in one embodiment, the connecting member 15 is a snap structure. The connecting member 15 is installed on the external platform and buckles the connecting seat 14 on the platform surface. Since the connecting seat 14 adopts a long strip structure, the connecting seat 14 can slide and adjust its position on the platform surface along the arrangement direction of the comb tooth blocks 10 to fix the battery cell comb strip structure at the required position.

[0119] Embodiment 5

[0120] This embodiment provides a battery cell welding platform, which includes a platform body 50 and a welding assembly 51 arranged on the surface of the platform body 50. This battery cell welding platform has the battery cell comb strip structure mentioned in the above Embodiments 1 to 4. The battery cell comb strip structure is arranged on the surface of the platform body 50 and is arranged adjacent to the welding assembly 51; the welding assembly 51 forms a welding station in the area above it or on one side of the battery cell comb strip structure;

[0121] Specifically, as Figure 9 shown, the battery cell comb strip structure is arranged above the welding assembly 51, and the welding assembly 51 is directly below the support plate 12 between two rows of comb tooth blocks 10. The battery cell comb strip structure is used to arrange the welding tape 20 passing through the guiding groove 11 at the welding station. At this time, the welding tape 20 is in contact with the bus bar 40. The welding assembly 51 heats the bus bar 40 above the support plate 12 through its electromagnetic induction welding principle, and applies appropriate pressure to the welding tape 20 and the bus bar 40 through a pressurizing device, so as to weld the welding tape 20 and the bus bar 40.

[0122] Regarding the welding principle of the welding assembly 51, it belongs to the common knowledge in the art, and this embodiment will not be elaborated here.

[0123] The battery cell welding platform in this embodiment realizes the combing of the welding tape 20 before welding, so it also has all the advantages in the above embodiments, and can also weld the welding tapes 20 on one side of two groups of battery cells 30 at the same time, improving the welding efficiency.

[0124] Embodiment 6

[0125] This embodiment provides a stack welding machine, which includes a frame, on which the above-mentioned solar cell welding platform is installed; it also has a first handling mechanism and a second handling mechanism. The first handling mechanism is used to transport the bus bar 40 to the welding station of the solar cell welding platform; the second handling mechanism is used to transport the solar cell 30 close to the solar cell welding platform, so that the welding tapes 20 of the solar cell 30 are arranged on the upper surface of the bus bar 40 under the guidance of the solar cell tape combing structure; the solar cell welding platform is used to weld the bus bar 40 and the welding tapes 20.

[0126] This stack welding machine realizes the automatic preparation and handling of the bus bar 40, and also realizes the handling of the solar cell 30 and the combing of the welding tapes 20. The whole stack welding machine runs automatically, realizing the one-stop welding operation of the welding tapes 20 and the bus bar 40, improving the efficiency of the welding process of the solar cell 30, and being beneficial to improving the processing output and quality of the solar cell 30.

[0127] Embodiment 7

[0128] This embodiment provides a welding method for solar cells, as Figure 10 shown, the method includes the following steps:

[0129] A plurality of comb teeth blocks 10 are arranged along a straight line at the edge of the welding assembly 51. The plurality of comb teeth blocks 10 are arranged at intervals, and a guiding groove 11 is formed therebetween.

[0130] A bus bar 40 is arranged on one side of the plurality of comb teeth blocks 10 arranged at intervals along a straight line; in this step, the bus bar 40 at the cutting station can be transported to the welding station by a handling mechanism. At this time, the bus bar 40 is located on one side adjacent to the comb teeth block 10.

[0131] Move the plurality of welding tapes 20 on at least one side of the solar cell 30 to near the plurality of comb teeth blocks 10 arranged at intervals along a straight line; in this step, the handling mechanism sucks the solar cell 30 and moves the solar cell 30 above the welding assembly 51 and the comb teeth block 10. Specifically, the welding tapes 20 of the solar cell 30 are located directly above the bus bar 40 and the guiding groove 11.

[0132] Move the solar cell 30 so that the welding tapes 20 move downward towards the comb teeth block 10. The welding tapes 20 contact the side wall of the comb teeth block 10, and under the guidance of the guiding groove 11 of the comb teeth block 10, the welding tapes 20 are moved into the guiding groove 11 so that the comb teeth block 10 forms a support for the welding tapes 20.

[0133] During the movement of the welding tapes 20, the inner wall of the guiding groove 11 presses the welding tapes 20, so that the uneven welding tapes 20 are arranged in an orderly manner and are supported near the bottom of the guiding groove 11. At this time, the welding tapes 20 also overlap on the bus bar 40 and wait for welding.

[0134] The bus bar 40 and the welding tape 20 are welded together by the welding assembly 51. During the welding process, the welding tape 20 and the bus bar 40 are pressed by the pressing mechanism so that the welding tape 20 and the bus bar 40 are fully welded.

[0135] By this welding method, there is no need to perform other steps on the welding tape 20. Just move along the original moving path of the welding tape 20. When the welding tape 20 is moved to the welding station, the combing of the welding tape 20 can be realized, ensuring that the welding tape 20 is neatly arranged on the bus bar 40 to ensure the welding quality.

[0136] Such as Figure 10 shown, further, two side walls of the comb teeth blocks 10 facing each other can be set as conductors, and the two side walls are insulated from each other. The two side walls are connected to the controller or the corresponding handling mechanism through a circuit.

[0137] In this step, the handling mechanism is made to stop moving the battery cell 30 in response to the in-place feedback signal generated by the contact conduction between the welding tape 20 and the two side walls of the guiding groove 11. That is, when the welding tape 20 contacts the two side walls of the guiding groove 11, the handling mechanism immediately stops, maintaining the current state of the battery cell 30 and the welding tape 20.

[0138] The welding tape 20 is brought into contact with the two conductor side walls of the adjacent comb teeth blocks 10 facing each other. A loop is formed by the two side walls contacting the welding tape 20 simultaneously to generate an in-place feedback signal for feeding back the arrangement and in-place of the welding tape 20. This in-place feedback signal is sent to the controller or the corresponding handling mechanism, which can control the handling mechanism to stop running immediately, making the welding tape 20 in the best correction position. And this feedback signal can also be sent to the welding mechanism, that is, when the welding tape 20 is in place, the welding mechanism immediately starts welding operation, improving the welding efficiency. The content of this part can also refer to the description of Embodiment 2 above, and will not be elaborated in this embodiment.

[0139] Embodiment 8

[0140] This embodiment provides a computer program product, which is provided with a computer program on its back. When the computer program is executed, it can implement the steps of the above-mentioned welding method. The specific steps are as described above, and will not be elaborated in this embodiment.

[0141] This computer program product can be configured in a stack welding machine to make the stack welding machine automatically operate for welding the battery cells 30. While achieving all the advantages of the above method, it also realizes the intelligentization of battery cell processing, which is beneficial to improving the production efficiency of battery cells.

[0142] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0143] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A comb belt structure, characterized in that, Comprising: A plurality of comb teeth blocks (10) arranged at intervals along a straight line, and a guiding groove (11) is formed between two adjacent comb teeth blocks (10); The guiding groove (11) is used to guide the welding tape (20) of the battery cell (30) approaching the comb belt structure to arrange the welding tape (20).

2. The comb belt structure according to claim 1, characterized in that, One side of the comb teeth block (10) facing the guiding groove (11) has a first side wall (101); The distance between two opposite first side walls (101) of adjacent comb teeth blocks (10) gradually decreases in the direction from the top of the guiding groove (11) to the bottom of the guiding groove (11) to guide the welding tape (20) to the bottom of the guiding groove (11).

3. The comb belt structure according to claim 2, wherein One side of the comb teeth block (10) facing the guiding groove (11) has a second side wall (102), the second side wall (102) is connected to the first side wall (101), and the second side wall (102) is closer to the bottom of the guiding groove (11) than the first side wall (101); The first side wall (101) is used to guide the welding tape (2) to one side of the second side wall (102).

4. The comb belt structure according to claim 3, wherein The second side wall (102) extends in the direction of the bottom of the guiding groove (11), and two opposite second side walls (102) between adjacent comb teeth blocks (10) intersect.

5. The comb belt structure according to claim 4, characterized in that, The surfaces of the second side wall (102) and the first side wall (101) are both planes, and the slope of the second side wall (102) is different from the slope of the first side wall (101).

6. The comb belt structure according to claim 3, characterized in that, The second side wall (102) extends to the bottom of the guiding groove (11), the distance between two opposite second side walls (102) between adjacent comb teeth blocks (10) is equal, and the distance between the two is greater than the width of the welding tape (20).

7. The comb belt structure according to claim 4, characterized in that, The second side wall (102) includes: A first wall segment (1021) connecting the first side wall (101); A second wall segment (1022) extending from the first wall segment (1021) to the bottom of the guiding groove (11), and two opposite second wall segments (1022) between adjacent comb teeth blocks (10) intersect; The second wall segment (1022) is arranged at an angle with the first wall segment (1021).

8. The comb belt structure according to claim 7, wherein, The distance between two opposite first wall segments (1021) between adjacent comb teeth blocks (10) is equal, and the distance between the two first wall segments (1021) is greater than the width of the welding tape (20).

9. The comb belt structure according to claim 4, characterized in that The second side wall (102) is a conductor, and two opposite second side walls (102) between adjacent comb teeth blocks (10) are insulated; When the two second side walls (102) are in contact with the welding tape (20) at the same time, a circuit is formed through the welding tape (20) to generate a feedback signal for feedback of the arrangement of the welding tape (20) in place.

10. The comb belt structure according to any one of claims 2 to 9, characterized in that, The comb tooth block (10) has a third side wall (103), and the third side wall (103) is arranged on one side of the extending direction of the guiding groove (11) and is connected to the first side wall (101); The distance between two adjacent third side walls (103) of adjacent comb tooth blocks (10) gradually increases from the inside of the guiding groove (11) to the outside of the guiding groove (11), so as to guide the solder strip (20) outside the guiding groove (11) to the first side wall (101).

11. The comb belt structure according to claim 1, characterized in that, A first positioning groove (111) is arranged at the bottom of the guiding groove (11). The width of the first positioning groove (111) is smaller than the minimum width of the guiding groove (11) and larger than the width of the solder strip (20). The guiding groove (11) is used to guide the solder strip (20) into the first positioning groove (111).

12. The comb belt structure according to claim 11, wherein, A second positioning groove (112) is arranged at the bottom of the first positioning groove (111). The first positioning groove (111) is used to guide the solder strip (20) into the second positioning groove (112). The width of the second positioning groove (112) is at least partially smaller than the width of the solder strip (20) to limit the solder strip (20).

13. The comb belt structure according to any one of claims 1 to 9, characterized in that, Including: Two sets of comb tooth assemblies arranged in pairs; A support plate (12) connected between the two sets of comb tooth assemblies. The support plate (12) is used to support the bus bar (40); Each set of comb tooth assemblies includes a plurality of the comb tooth blocks (10) arranged at intervals along a straight line.

14. The comb belt structure according to claim 13, wherein, One side of each comb tooth block (10) close to the other set of comb tooth assemblies has a fourth side wall (104). The distance between two opposite fourth side walls (104) between the two sets of comb tooth assemblies gradually decreases from the top of the comb tooth block (10) to the bottom of the comb tooth block (10), so as to guide the bus bar (40) to the support plate (12).

15. The comb belt structure according to any one of claims 1 to 9, characterized in that, It also includes: A base (13) arranged at the bottoms of the plurality of comb tooth blocks (10), A connecting seat (14) arranged on one side of the base (13) along the arrangement direction of the comb tooth blocks (10); A connecting member (15) detachably connected to the connecting seat (14) for installing the connecting seat (14) on an external platform; The connecting member (15) is slidably matched with the connecting seat (14) so that the connecting seat (14) can move and adjust along the extending direction of the base (13).

16. A battery cell welding platform, characterized in that, Including: A platform body (50); A welding assembly (51) arranged on the surface of the platform body (50). The welding assembly (51) forms a welding station in the area above it; The comb strip structure according to any one of claims 1 to 15, the comb strip structure is arranged on the surface of the platform body (50) and is arranged adjacent to the welding assembly (51); The comb strip structure is used to arrange the solder strip (20) passing through the guiding groove (11) on the welding station.

17. A stack welding machine, characterized in that, Including a frame and respectively installed on the frame: The battery cell welding platform according to claim 16; The first handling mechanism is used to handle the bus bar (40) to the welding station of the cell welding platform; The second handling mechanism is used to handle the cell (30) close to the cell welding platform, so that the welding tapes (20) of the cell (30) are arranged on the upper surface of the bus bar (40) under the guidance of the cell tape combing structure; The cell welding platform is used to weld the bus bar (40) and the welding tape (20).

18. A welding method for a battery cell, characterized in that, It includes: A bus bar (40) is arranged on one side of a plurality of comb teeth blocks (10) arranged at intervals along a straight line; Move a plurality of welding tapes (20) on at least one side of the cell (30) near the comb teeth block (10); Move the cell (30) so that the welding tape (20) moves towards the comb teeth block (10), and under the guidance of the guiding groove (11) of the comb teeth block (10), move the welding tape (20) into the guiding groove (11), so that the comb teeth block (10) forms a support for the welding tape (20) and contacts the bus bar; Weld the bus bar and the welding tape.

19. The welding method of the battery chip according to claim 18, characterized in that, Before the step of welding the bus bar and the welding tape, it further includes: In response to the in-place feedback signal generated by the contact conduction of the welding tape with the two side walls of the guiding groove (11), stop moving the cell (30).

20. A computer program product is provided with a computer program, characterized in that, When the computer program is executed, it can implement the steps of the method according to claim 18 or 19.

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