Battery piece and welding strip series welding carrying positioning assembly and battery piece series welding method

Abstract

The present application relates to the technical field of battery string production, and particularly relates to a carrying and positioning assembly for battery piece and welding strip string welding and a battery piece string welding method. The carrying and positioning assembly comprises a feeding suction plate, a transfer seat, a blanking suction plate, a welding base and a plurality of elastic pressing mechanisms. The bottom of the feeding suction plate is provided with a first suction plane, and the two ends of the feeding suction plate are provided with cutting heads. The cutting heads are provided with first positioning protrusions matched with positioning holes. The transfer seat is provided with a first supporting plane and a cutting groove for the cutting heads to extend into. The bottom of the blanking suction plate is provided with a second suction plane, and the blanking suction plate is provided with a plurality of light transmission holes corresponding to the welding areas of the welding strips and allowing the welding laser to pass through. The welding base is provided with a second supporting plane for the conveying mechanism of the battery pieces to pass through. The plurality of elastic pressing mechanisms are telescopically arranged on the welding base, and the positions of the elastic pressing mechanisms correspond to the welding areas. The present application can improve the quality of battery piece string welding and avoid incomplete welding and false welding.

Description

Handling and positioning components for cell and ribbon stringing and cell stringing method Technical Field

[0001] This invention belongs to the field of battery string production technology, specifically relating to a handling and positioning component for string welding of battery cells and welding strips, and a method for string welding of battery cells. Background Technology

[0002] In the production process of BC batteries, the battery cells 9 need to be serially welded together, with multiple battery cells 9 connected end-to-end using welding ribbon 8. Referring to Figures 1 and 2, during welding, two battery cells 9 are placed side-by-side, and a suction cup transport mechanism picks up and transports the cut welding ribbon 8 onto the battery cells 9 for welding, connecting the electrodes of the battery cells 9 at both ends. To avoid damage to the battery cells 9 due to post-welding stress, the welding ribbon 8 is currently made relatively thin and has multiple deformation holes, greatly increasing its flexibility and deformation adaptability.

[0003] However, currently, welded battery strings often suffer from incomplete soldering or poor soldering, for three main reasons:

[0004] First, during the roll transport, loading, and cutting processes (the welding strip 8 needs to be cut twice: once from the roll into individual pieces, and once after being positioned and adsorbed by a suction cup to remove the portion used for positioning), it is difficult to guarantee its initial shape, and some deformation will inevitably occur. However, before welding, simply using a suction cup to grasp the strip cannot effectively restore its shape or correct its planar shape. This will cause initial deformation and defects, resulting in the welding strip 8 shifting its position when it covers the battery cell 9, leading to incomplete welding or poor welding.

[0005] Second, referring to Figure 2 (the arrows in Figure 2 indicate the possible deformation direction of the solder strip), during the process of the suction cup conveying mechanism carrying the solder strip 8, due to space limitations, the number of suction cup structures 10 is limited, which causes the unadsorbed part of the solder strip 8 to deform more or less, causing the position of the solder strip 8 to shift, which can lead to missed soldering or poor soldering.

[0006] Third, due to the difference in thickness of the solar cells 9, when one cell is placed on top of the other, the solder ribbon 8 and the solar cell 9 are both constrained by the plane, resulting in a slight gap between the thinner solar cell 9 and the solder ribbon 8. The suction cup structure 10 can only provide suction and not pressure, so this gap cannot be eliminated. Since the solder ribbon 8 is already thin enough, and the tin plating layer on it is even thinner (only tens of nanometers), a very tight contact is required for the tin plating in the limited space to melt and connect to the solar cell 9. Even a slightly large gap is enough to cause poor soldering and missing solder.

[0007] Therefore, a new technology is needed to solve the problems of missing solder and poor soldering in the existing technology of battery cell string welding. Summary of the Invention

[0008] This invention provides a handling and positioning component for string welding of battery cells and solder ribbons, as well as a method for string welding of battery cells, which can improve the quality of string welding of battery cells and avoid missing welds and incomplete welds.

[0009] The embodiments of the present invention are implemented as follows:

[0010] A transport and positioning assembly for serial welding of battery cells and welding strips, wherein the welding strips are provided with a plurality of deformation holes and positioning holes are provided at both ends of the welding strips, and the transport and positioning assembly includes a loading adsorption plate, a transfer seat, a dropping adsorption plate, a welding base and a plurality of elastic clamping mechanisms.

[0011] The feeding adsorption plate can be transferred between the feeding station and the transfer seat and can be pressed together with the transfer seat from top to bottom. The unloading adsorption plate can be transferred between the transfer seat and the welding base and can be pressed together with the transfer seat or the welding base from top to bottom.

[0012] The bottom of the feeding adsorption plate is provided with a first adsorption plane, and both ends of the feeding adsorption plate are equipped with cutting heads that can be extended and retracted vertically. The cutting heads are provided with a first positioning protrusion that matches and positions with the positioning hole.

[0013] The transfer seat is provided with a first support plane and a cutting groove into which the cutting head extends;

[0014] The bottom of the material dropping adsorption plate is provided with a second adsorption plane, and the material dropping adsorption plate is provided with a number of light-transmitting holes corresponding to the welding area of ​​the welding strip, allowing the welding laser to pass through.

[0015] The welding base is provided with a second support plane through which the battery cell conveying mechanism can fit and pass. Several elastic clamping mechanisms are telescopically arranged on the welding base, and the position of each elastic clamping mechanism corresponds to the welding area.

[0016] Furthermore, the transfer seat also includes a plurality of second positioning protrusions disposed on the first support plane, the positions of the second positioning protrusions corresponding to the positions of the deformation holes of the flattened welding strip, and the cross-sectional dimensions of the second positioning protrusions gradually decrease from bottom to top.

[0017] Furthermore, the upper end of the second positioning protrusion is tapered.

[0018] Furthermore, the lower end of the second positioning protrusion is cylindrical, and the inner wall of the deformable hole is tangent to the lower end of the second positioning protrusion.

[0019] Furthermore, the first adsorption surface is provided with a first recess for the second positioning protrusion to be inserted; the second adsorption surface is provided with a second recess for the second positioning protrusion to be inserted.

[0020] Furthermore, the elastic clamping mechanism includes a top head and an elastic telescopic mechanism;

[0021] The welding base is provided with a sliding groove, the top head is slidably disposed in the sliding groove, and the elastic telescopic mechanism is connected to the top head and can cause the top head to extend out of the sliding groove or retract into the sliding groove.

[0022] Furthermore, the cutting groove extends through the transfer seat.

[0023] Furthermore, the transfer seat is also provided with several vertically connected through slots for the flux spray head to extend and retract vertically, and each through slot corresponds to a welding area.

[0024] The present invention also provides a method for string welding of battery cells, using a handling and positioning assembly for string welding of battery cells and solder strips as described in any of the preceding claims, the method comprising the following steps:

[0025] The feeding adsorption plate transports the welding strip from the feeding station and presses it onto the transfer seat, and the cutting head cuts the welding strip;

[0026] The feeding adsorption plate releases the welding strip and moves away from the transfer seat;

[0027] The material feeding and adsorption plate transports the cut welding strip from the transfer seat to the top of the welding base, wherein the welding base is pre-loaded with two adjacent battery cells by the battery cell conveying mechanism;

[0028] The material suction plate and the welding base press the welding strip and the two battery cells together, and the elastic pressing mechanism lifts the battery cells up to be in close contact with the welding strip.

[0029] The laser welding equipment emits a welding laser into the light-transmitting hole to perform welding.

[0030] After welding, the material suction plate releases the welding strip and moves it away from the welding base. The conveying mechanism conveys the welded battery cell forward and simultaneously conveys two adjacent battery cells to the welding base.

[0031] Repeat the above steps until the cell stringing is complete.

[0032] Furthermore, the transfer seat is also provided with several vertically connected through slots for the flux spray head to extend and retract vertically, and each through slot corresponds to a welding area.

[0033] The feeding adsorption plate transports the welding strip from the feeding station and presses it onto the transfer seat. During the step of the cutting head cutting the welding strip, flux is applied to the welding area on the welding strip at the same time as cutting.

[0034] The beneficial effects achieved by this invention are:

[0035] In this invention, a feeding adsorption plate is used for conveying the welding strip during feeding. The first positioning protrusion of the cutting head on the feeding adsorption plate can cooperate with the positioning holes of the welding strip for positioning, ensuring accurate positioning of the welding strip when the feeding adsorption plate adsorbs and conveys it. Furthermore, since the feeding adsorption plate uses a first adsorption plane, it can fully adhere to the welding strip when adsorbing it, reducing deformation of the welding strip during conveying. The feeding adsorption plate conveys the welding strip to the transfer seat and presses it down, which can flatten the welding strip and obtain a non-deformed welding strip. At this time, the cutting head cuts off the two ends of the welding strip where the positioning holes are set, obtaining the welding strip required for welding. The welding ribbon is then transferred from the transfer seat to the welding base by the suction plate. Because the suction plate uses a second suction plane, and the welding ribbon is completely flat and undeformed at this point, the suction plate can transfer the ribbon from the transfer seat without deformation to the welding base and clamp it down, pressing the solar cell and welding ribbon together. Then, an elastic clamping mechanism extends to lift the area of ​​the solar cell to be welded, ensuring close contact with the welding ribbon. This allows the laser welding equipment to weld the welding ribbon and solar cell together through the light-transmitting holes on the suction plate. Since the welding ribbon remains undeformed and does not shift when transferred to the solar cell, and the welding ribbons and solar cells are tightly adhered during welding, incomplete welds and weak welds are avoided, resulting in a good welding effect. Attached Figure Description

[0036] Figure 1 is a schematic diagram of welding a solder strip to two solar cells using existing technology;

[0037] Figure 2 is a schematic diagram of the suction cup adsorption of welding ribbon provided by the prior art;

[0038] Figure 3 is a schematic diagram of the conveying and positioning assembly for welding battery cells and welding strips provided in an embodiment of the present invention during the welding process.

[0039] Figure 4 is an exploded view of the feeding adsorption plate and the transfer seat provided in the embodiment of the present invention.

[0040] Figure 5 is an enlarged view of point A in Figure 4;

[0041] Figure 6 is a schematic diagram of the feeding adsorption plate provided in an embodiment of the present invention;

[0042] Figure 7 is an enlarged view of point B in Figure 6;

[0043] Figure 8 is a schematic diagram of the structure of a single solder strip provided in an embodiment of the present invention;

[0044] Figure 9 is a top view of the welding strip flattened on the intermediate rotating base according to an embodiment of the present invention;

[0045] Figure 10 is an enlarged view of point C in Figure 9;

[0046] Figure 11 is a schematic diagram of the material adsorption plate provided in an embodiment of the present invention;

[0047] Figure 12 is an enlarged view of point D in Figure 11;

[0048] Figure 13 is a schematic diagram of the welding base provided in an embodiment of the present invention;

[0049] Figure 14 is a comparative schematic diagram of the feeding adsorption plate and the transfer station, the unloading adsorption plate and the transfer station, and the unloading adsorption plate and the welding base being pressed together by the upper and lower parts of the embodiment of the present invention.

[0050] Figure 15 is an enlarged view of point E in Figure 14;

[0051] Figure 16 is an enlarged view of point F in Figure 14;

[0052] Figure 17 is a flowchart of the battery cell stringing method provided in an embodiment of the present invention.

[0053] Icon labels:

[0054] 1. Feeding adsorption plate; 11. First adsorption plane; 111. First adsorption hole; 12. First recess; 13. Cutting head; 131. First positioning protrusion; 14. Telescopic groove;

[0055] 2. Transfer base; 21. First support plane; 22. Cutting groove; 23. Second positioning protrusion; 24. Through groove; 25. Flux spray head;

[0056] 3. Material suction plate; 31. Second suction plane; 311. Second suction hole; 32. Light-transmitting hole; 33. Second recess;

[0057] 4. Welded base; 41. Second support plane; 42. Slide groove;

[0058] 5. Elastic clamping mechanism; 51. Top head; 511. Sliding part; 512. Pressing part; 5121. Chamfer; 52. Elastic telescopic mechanism;

[0059] 6. Conveying mechanism; 61. Excavation;

[0060] 7. Material loading station;

[0061] 8. Welding strip; 81. Deformation hole; 82. Positioning hole; 83. Welding area;

[0062] 9. Battery cells;

[0063] 10. Suction cup structure. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the invention, and should not be construed as limiting the invention. Furthermore, it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0065] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "left", "right", "horizontal", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0067] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0069] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0070] In the initial handling of the welding strip 8, this invention uses the first adsorption plane 11 of the loading adsorption plate 1 to adsorb the welding strip 8 and the first positioning protrusion 131 to position the welding strip 8. This allows the welding strip 8 to adhere to the adsorption plane during adsorption, reducing deformation during handling. The welding strip 8 is flattened by clamping it with the transfer station, and is cut during this process to prevent deviation. This results in a flattened and accurately positioned welding strip 8 at the transfer station. The welding strip 8 is then adsorbed by the second adsorption plane 31 of the unloading adsorption plate 3 and transported to the welding base 4 for pressing. Since an adsorption plane is also used and the welding strip 8 is already flattened, it remains in contact with the second adsorption plane 31 throughout the subsequent handling process without deformation. The welding strip 8 and the battery cell 9 are clamped together on the welding base 4, and the elastic pressing mechanism 5 lifts the battery cell 9 to tightly adhere it to the welding strip 8, ensuring no incomplete or missed welds during welding.

[0071] Example 1

[0072] Referring to Figures 3 to 16, this embodiment provides a transport and positioning assembly for serial welding of battery cells and welding ribbons, used to transport the welding ribbon 8 to press and weld it with the battery cell 9 to avoid missing welds or incomplete welds and to ensure welding quality.

[0073] Referring to Figure 8, the welding strip 8 has several deformation holes 81 and positioning holes 82 at both ends. The deformation holes 81 on the welding strip 8 are intended to increase the flexibility of the welding strip 8, so that the welding strip 8 can reduce stress after welding with the battery cell 9 and avoid stress damage to the battery cell 9. The positioning holes 82 at both ends of the welding strip 8 are structures specifically used for positioning during handling. For welding with the battery cell 9, the two ends with the positioning holes 82 are redundant structures and need to be cut off after adsorption welding before the welding strip 8 is transported to the battery cell 9 for welding. For ease of reference, the part of the welding strip 8 with the positioning holes 82 that needs to be cut off is called the positioning section, and the part of the welding strip 8 that needs to be retained for welding with the battery cell 9 is called the welding section. Several deformation holes 81 indicate that the number of deformations of the welding strip 8 is one or more.

[0074] Referring to Figure 3, the transport and positioning assembly includes a loading adsorption plate 1, a transfer seat 2, a unloading adsorption plate 3, a welding base 4, and several elastic pressing mechanisms 5.

[0075] Referring to Figure 3, the feeding adsorption plate 1 can be transferred between the feeding station 7 and the transfer seat 2 and can be pressed together with the transfer seat 2. The unloading adsorption plate 3 can be transferred between the transfer seat 2 and the welding base 4 and can be pressed together with the transfer seat 2 or the welding base 4.

[0076] The coiled welding strip 8 is cut into multiple individual pieces at the feeding station 7. The feeding adsorption plate 1 is used to transport the individual pieces of welding strip 8 at the feeding station 7 to the transfer seat 2 and flatten them, eliminating the deformation of the welding strip 8 during the individual cutting process and the deformation during the transfer to the transfer seat 2.

[0077] Referring to Figures 6 and 7, the bottom of the feeding adsorption plate 1 is provided with a first adsorption plane 11, and both ends of the feeding adsorption plate 1 are equipped with vertically extendable cutting heads 13. The cutting heads 13 are provided with a first positioning protrusion 131 that matches and positions with the positioning hole 82. The transfer seat 2 is provided with a first support plane 21 and a cutting groove 22 for the cutting head 13 to extend into.

[0078] The first adsorption plane 11 is flat, capable of adsorbing welding material. It adheres to the welding strip 8 via its flat bottom surface before adsorption, allowing the welding strip 8 to be flattened as much as possible during adsorption, preventing deformation during transport. The welding strip 8 is then transported to the transfer seat 2, where the loading adsorption plate 1 and the transfer seat 2 press together, pressing the welding strip 8 flat. Because the welding strip 8 deformed minimally during transport and has first positioning protrusions 131 and positioning holes 82 at both ends for positioning, the welding strip 8 can be smoothly flattened during this pressing, eliminating deformation. After flattening, the cutting head 13 extends downwards into the cutting groove 22. During this process, the positioning section of the welding strip 8 is cut off and pressed into the cutting groove 22, leaving only the flattened welding strip 8 on the transfer seat 2.

[0079] Specifically, referring to Figure 7, the first adsorption plane 11 is provided with a plurality of first adsorption holes 111. One end of the first adsorption hole 111 is connected to a negative pressure pipeline, and the other end is used to adsorb the welding strip 8. The plurality of first adsorption holes 111 indicates that the number of first adsorption holes 111 is one or more.

[0080] Referring to Figures 4, 6, and 15, the cutting head 13 is installed at both ends of the feeding adsorption plate 1. When the feeding adsorption plate 1 adsorbs the welding ribbon 8, the cutting head 13 retracts to be flush with the first adsorption plane 11, only exposing the first positioning protrusion 131 and the positioning holes 82 at both ends of the welding ribbon 8 for positioning. After the welding ribbon 8 is positioned by the first positioning protrusion 131 and the positioning holes 82 during adsorption, the position of the welding ribbon 8 can be determined, making the position of the welding ribbon 8 accurate during transportation and reducing deviation. In this embodiment, the first positioning protrusion 131 is a positioning pin, and its lower end is tapered.

[0081] Understandably, the length and width of the first adsorption plane 11 are sufficient to at least cover the portion of the solder strip 8 that does not require cutting. That is, the first adsorption plane 11 can completely cover the entire solder strip 8, with the cutting head 13 installed inside the loading adsorption plate 1. An expansion groove 14 can be provided on the first adsorption plane 11 for the cutting head 13 to be installed and extend / retract. Alternatively, the first adsorption plane 11 can only cover the welding section of the solder strip 8, with the positioning section of the solder strip 8 extending beyond both ends of the first adsorption plane 11. The cutting head 13 is installed at both ends of the loading adsorption plate 1, not on the first adsorption plane 11, but it can still be positioned with the positioning holes 82 of the solder strip 8.

[0082] Specifically, referring to Figure 6, in this embodiment, the loading adsorption plate 1 has telescopic grooves 14 at both ends, which are vertically connected. A cutting head 13 is installed within the telescopic groove 14 and connected to a cutting drive mechanism, which drives the cutting head 13 to move up and down. When the loading adsorption plate 1 adsorbs the welding strip 8 and presses it against the transfer seat 2, the cutting head 13 extends out of the telescopic groove 14 and into the cutting groove 22, thereby cutting off the positioning section of the welding strip 8 below. The telescopic groove 14 has a rectangular cross-section, and the cutting head 13 is cuboid in shape with a first positioning protrusion 131 on its bottom surface. The edges of the cutting head 13 are sharp to cut the welding strip 8.

[0083] Understandably, the feeding suction plate 1 is moved by the moving mechanism to transfer between the feeding station 7 and the transfer seat 2 and to close with the transfer seat 2. The cutting drive mechanism connected to the cutting head 13 can be installed on the feeding suction plate 1 or on the moving mechanism, as long as it can drive the cutting head 13 to extend and retract up and down in the telescopic groove 14. The cutting drive mechanism is a hydraulic rod, a pneumatic rod, or a telescopic motor.

[0084] Referring to Figures 11 and 12, the bottom of the material-feeding adsorption plate 3 is provided with a second adsorption plane 31, and the material-feeding adsorption plate 3 is provided with a plurality of light-transmitting holes 32 corresponding to the welding areas 83 of the welding strip 8 for the welding laser to pass through. The welding base 4 is provided with a second support plane 41 for the conveying mechanism 6 of the battery cell 9 to fit and pass through, and a plurality of elastic pressing mechanisms 5 are retractably arranged on the welding base 4, the position of each elastic pressing mechanism 5 corresponding to the welding area 83. The term "a plurality of light-transmitting holes 32" indicates that the number of light-transmitting holes 32 is one or more.

[0085] After the positioning section of the welding strip 8 with the positioning hole 82 is cut, the loading adsorption plate 1 is removed from the transfer seat 2 and returns to the loading station 7 to continue adsorbing the welding strip 8. The unloading adsorption plate 3 is transferred to the transfer seat 2 and pressed against the transfer seat 2. At this time, the second adsorption plane 31 presses on the welding strip 8 (after cutting) and adsorbs it. Since the welding strip 8 is now completely flattened and correctly positioned, and the second adsorption plane 31 is also a plane, it can completely fit with the welding strip 8. After the welding strip 8 is adsorbed, the welding strip 8 can also completely fit on the second adsorption plane 31. When it is adsorbed and transported by the unloading adsorption plate 3, the welding strip 8 can not be deformed, ensuring that the welding strip 8 has the correct posture.

[0086] Referring to Figure 3, a conveying mechanism 6 is arranged on the welding base 4. The conveying mechanism 6 can be a conveyor belt, which runs along the second support plane 41 of the welding base 4. The conveyor belt transports individual battery cells 9, which are arranged sequentially back and forth, and the gap between two adjacent battery cells 9 meets the spacing requirements for series welding of battery cells 9. The conveying mechanism 6 controls two adjacent battery cells 9 to move onto the second support plane 41, and the position of the battery cell 9 to be welded on the battery cell 9 corresponds to the position of the light-transmitting hole 32 after the material suction plate 3 and the welding base 4 are pressed together. Therefore, when the material suction plate 3 and the welding base 4 are pressed together, two battery cells 9 and the welding strip 8 are sandwiched between them, and at this time, the electrodes of the battery cell 9 and the welding area 83 of the welding strip 8 are vertically aligned, and also vertically aligned with the light-transmitting hole 32. Because of the thickness difference of the battery cells 9, some welding areas 83 of the solder ribbon 8 are not in close contact with the electrodes of the battery cells 9. Therefore, the elastic clamping mechanism 5 extends to lift the battery cells 9 upwards, so that the battery cells 9 and the welding areas 83 of the solder ribbon 8 are in close contact. Then, a laser welding device emits a welding mechanism into the light-transmitting hole 32 to heat the solder ribbon 8 and weld the solder ribbon 8 to the battery cells 9 together.

[0087] Understandably, referring to Figure 13, the welding base 4 is provided with several grooves 42 corresponding one-to-one with the welding areas 83. Each groove 42 is equipped with an elastic clamping mechanism 5, which can extend and retract on the welding base 4. When the elastic clamping mechanism 5 extends, it can extend upwards above the second support plane 41, thereby lifting the battery cell 9 on the second support plane 41 upwards until it is tightly attached to the welding strip 8.

[0088] Since the conveyor belt of the conveying mechanism 6 is sandwiched between the battery cell 9 and the second support plane 41, to prevent the conveyor belt from obstructing the lifting of the battery cell 9 by the elastic clamping mechanism 5, multiple rows of perforations 61 can be provided on the conveyor belt, as shown in Figure 3. Each row of perforations 61 corresponds one-to-one with the number and position of the elastic clamping mechanisms 5. Each time the conveyor belt conveys the battery cell 9 forward, the next row of perforations 61 is aligned with the elastic clamping mechanism 5. When the elastic clamping mechanism 5 extends, it can pass through the perforations 61 and lift the battery cell 9. After welding is completed, the elastic clamping mechanism 5 retracts into the slide groove 42 to avoid being inserted into the perforations 61 and obstructing the continued conveying of the conveyor belt. The conveyor belt conveys the two welded battery cells 9 forward. When the two cells to be welded reach the welding base 4, the next row of perforations 61 is vertically aligned with the position of the elastic clamping mechanism 5.

[0089] The term "several elastic clamping mechanisms 5" indicates that the number of elastic clamping mechanisms 5 is one or more, and the specific number is set to correspond to the number of welding areas 83 of the welding strip 8, and the two are equal. Similarly, the term "several sliding grooves 42" indicates that the number of sliding grooves 42 is one or more, and the specific number is set to correspond to the number of elastic clamping mechanisms 5, and the two are equal.

[0090] Specifically, referring to Figures 11 and 12, the second adsorption plane 31 is provided with a plurality of second adsorption holes 311. One end of each second adsorption hole 311 is connected to a negative pressure pipeline, and the other end is used to adsorb the welding ribbon 8. The plurality of second adsorption holes 311 indicates that the number of second adsorption holes 311 is one or more.

[0091] Based on the above structure, in the initial handling of the welding strip 8, the present invention uses the first adsorption plane 11 of the loading adsorption plate 1 to adsorb the welding strip 8 and the first positioning protrusion 131 to position the welding strip 8. This allows the welding strip 8 to adhere to the adsorption plane during adsorption, reducing deformation during handling. By clamping with the transfer station, the welding strip 8 is flattened, and during this process, the welding strip 8 is cut to prevent it from shifting during cutting. This results in a flattened and accurately positioned welding strip 8 at the transfer station. Then, the second adsorption plane 31 of the unloading adsorption plate 3 adsorbs the welding strip 8 and transports it to the welding base 4 for pressing. Since an adsorption plane is also used and the welding strip 8 is already flattened at this time, the welding strip 8 can adhere to the second adsorption plane 31 throughout the subsequent handling process without deformation. The welding strip 8 and the battery cell 9 are clamped together on the welding base 4, and the elastic pressing mechanism 5 lifts the battery cell 9 to fit tightly with the welding strip 8, ensuring no incomplete or missing welds during welding.

[0092] In addition, multiple guide posts are provided on the transfer seat 2 and the welding base 4, and guide holes are provided on the loading adsorption plate 1 and the unloading adsorption plate 3. The guide holes of the loading adsorption plate 1 can be positioned in conjunction with the guide posts of the transfer seat 2, while the guide holes of the unloading adsorption plate 3 can be positioned in conjunction with the guide posts of the transfer seat 2 and the welding base 4.

[0093] Example 2

[0094] This embodiment provides a handling and positioning assembly for serially welding battery cells and solder strips. Based on Embodiment 1, it also has the following design:

[0095] Referring to Figures 4 and 5, the transfer seat 2 further includes a plurality of second positioning protrusions 23 disposed on the first support plane 21. The positions of the second positioning protrusions 23 correspond to the positions of the deformation holes 81 of the flattened welding strip 8. The cross-sectional dimensions of the second positioning protrusions 23 gradually decrease from bottom to top.

[0096] When the flattened solder strip 8 is laid on the first support plane 21, the second positioning protrusion 23 can be inserted into the deformation hole 81 of the solder strip 8, and the position of the deformation hole 81 corresponds to the position of the second positioning protrusion 23. If the solder strip 8 is slightly offset when it is adsorbed on the first adsorption plane 11, since the cross-sectional size of the second positioning protrusion 23 is smaller at the top and larger at the bottom, its outer surface forms an upward inclined surface. When the deformation hole 81 is slightly offset, the upper end of the second positioning protrusion 23 can still be inserted into the deformation hole 81. As the feeding adsorption plate 1 descends, the welding strip 8 descends, causing the second positioning protrusion 23 to gradually insert into the deformation hole 81. During this process, the edge of the deformation hole 81 will contact the inclined upward surface of the second positioning protrusion 23 and continue to descend along this surface. This inclined surface will push the edge of the deformation hole 81 to the opposite side (i.e., push it in the opposite direction of the offset), so that the offset of the welding strip 8 gradually decreases, and finally the deformation hole 81 of the welding strip 8 is completely aligned with the second positioning protrusion 23, and the offset of the welding strip 8 is eliminated.

[0097] In other words, this embodiment can adjust the position of the offset solder strip 8 to the correct position through the inclined surface of the second positioning protrusion 23, thereby eliminating the offset of the solder strip 8 during the handling process of the feeding adsorption plate 1.

[0098] The number of second positioning protrusions 23 indicates that there are one or more second positioning protrusions 23.

[0099] Specifically, referring to Figure 5, the upper end of the second positioning protrusion 23 is tapered. That is, the upper end of the tapered second positioning protrusion 23 is inserted into the deformation hole 81. The inner wall of the deformation hole 81 contacts the tapered surface and is gradually guided back to offset during the descent, thereby aligning the position of the solder strip 8.

[0100] Further referring to Figures 5 and 10, the lower end of the second positioning protrusion 23 is cylindrical, and the inner wall of the deformation hole 81 is tangent to the lower end of the second positioning protrusion 23. That is, the upper end of the second positioning protrusion 23 is conical, and the lower end is cylindrical, with the diameters of the two circles at the junction of the conical and cylindrical shapes being equal. When the deformation hole 81 reaches the cylindrical part from the conical part, the position of the solder strip 8 is already aligned, and the cylindrical structure restricts the solder strip 8, preventing it from shifting further.

[0101] In this embodiment, referring to FIG10, the deformation hole 81 of the welding strip 8 is elliptical, which is internally tangent to the outer circle of the cylindrical lower end of the second positioning protrusion 23.

[0102] Example 3

[0103] This embodiment provides a handling and positioning assembly for serially welding battery cells and solder strips. Based on Embodiment 2, it also has the following design:

[0104] Referring to Figure 7, the first adsorption plane 11 is provided with a first recess 12 for the second positioning protrusion 23 to be inserted; referring to Figure 12, the second adsorption plane 31 is provided with a second recess 33 for the second positioning protrusion 23 to be inserted.

[0105] Since a second positioning protrusion 23 is provided on the first support plane 21, in order to avoid the second positioning protrusion 23 restricting the upper and lower pressing between the transfer seat 2 and the loading adsorption plate 1 and the unloading adsorption plate 3, a first recess 12 is provided on the first adsorption plane 11 and a second recess 33 is provided on the second adsorption plane 31.

[0106] The first recess 12 allows the second positioning protrusion 23 to be inserted when the feeding adsorption plate 1 and the transfer seat 2 are pressed together, thus preventing the second positioning protrusion 23 from directly contacting the first adsorption plane 11 and blocking the descent of the feeding adsorption plate 1, thereby causing a limit.

[0107] Similarly, the second recess 33 allows the second positioning protrusion 23 to be inserted when the material dropping adsorption plate 3 and the transfer seat 2 are pressed together, thus preventing the second positioning protrusion 23 from directly contacting the second adsorption plane 31 and blocking the descent of the material dropping adsorption plate 3, thereby causing a limit.

[0108] Understandably, the first recess 12 and the second recess 33 only need to allow the second positioning protrusion 23 to be inserted. Their shapes can be adapted to the shape of the second positioning protrusion 23 or larger than the size of the second positioning protrusion 23. The same applies to the depth of the first recess 12 and the second recess 33, which only need to allow the second positioning protrusion 23 to be fully inserted.

[0109] In this embodiment, the first recess 12 and the second recess 33 form a through hole for the second positioning protrusion 23 to be fully inserted.

[0110] Example 4

[0111] This embodiment provides a handling and positioning assembly for serially welding battery cells and solder strips. Based on Embodiment 1, it also has the following design:

[0112] Referring to Figures 14 and 16, the elastic pressing mechanism 5 includes a top head 51 and an elastic telescopic mechanism 52;

[0113] Referring to Figures 13 and 16, the welding base 4 is provided with a sliding groove 42, the top head 51 is slidably disposed in the sliding groove 42, and the elastic telescopic mechanism 52 is connected to the top head 51 and can cause the top head 51 to extend out of the sliding groove 42 or retract into the sliding groove 42.

[0114] Both the elastic telescopic mechanism 52 and the top head 51 are installed in the slide groove 42. The top head 51 is slidably connected to the slide groove 42. The elastic telescopic mechanism 52 can extend and retract, thereby causing the top head 51 to extend out of the slide groove 42 or retract into the slide groove 42.

[0115] When the elastic telescopic mechanism 52 extends the top head 51 out of the slide groove 42, the top head 51 can lift the battery cell 9 above it to fit tightly with the welding strip 8 (pressed on the welding base 4 by the material drop adsorption plate 3) so as to prevent false welding or missed welding during welding.

[0116] When the elastic telescopic mechanism 52 retracts the top head 51 back into the chute 42, it will not hinder the normal operation of the conveying mechanism 6.

[0117] In this embodiment, the top head 51 is made of high-temperature resistant material, which can withstand the heat during welding without being damaged, ensuring its ability to press the battery cell 9 and the welding strip 8 together.

[0118] Referring to Figure 16, the top head 51 includes a sliding part 511 and a pressing part 512 fixed to the upper end of the sliding part 511. The sliding part 511 is adapted to the shape of the groove 42 to slide in the groove 42. The upper opening of the groove 42 is smaller than the interior of the groove 42 to prevent the sliding part 511 from coming out of the groove 42. Correspondingly, the shape of the pressing part 512 is adapted to the shape of the upper opening of the groove 42 and can extend out from the upper opening of the groove 42 to lift the battery cell 9.

[0119] The elastic telescopic mechanism 52 can be a spring or a pneumatic rod. When the elastic telescopic mechanism 52 is a spring, the upper end of the pressing part 512 of the top head 51 is provided with a chamfer 5121. When the conveying mechanism 6 moves, the top head 51 can be automatically pressed down by the chamfer 5121. The chamfer 5121 can be a round chamfer 5121 or a beveled chamfer 5121.

[0120] Example 5

[0121] This embodiment provides a handling and positioning assembly for serially welding battery cells and solder strips. Based on Embodiment 1, it also has the following design:

[0122] Referring to Figure 15, the cutting groove 22 passes through the transfer seat 2.

[0123] When the cutting head 13 descends to cut the welding strip 8, the cutting head 13 will push the cut positioning segment with positioning hole 82 into the cutting groove 22. The positioning segment will continue to fall down along the cutting groove 22 and be discharged, realizing automatic material discharge of the cutting without the need for manual removal of the positioning segment.

[0124] The cross-sectional shape of the cutting groove 22 is adapted to the shape of the cutting head 13. In this embodiment, the cross-sectional shape of the cutting groove 22 is rectangular, and the cross-sectional shape of the cutting head 13 is also rectangular.

[0125] Understandably, the transfer station 2 is supported by a frame, and a container can be placed underneath it to catch the positioning section of the cut welding strip 8.

[0126] Example 6

[0127] This embodiment provides a handling and positioning assembly for serial welding of battery cells and solder strips. Based on any one of embodiments one to five, it also has the following design:

[0128] Referring to Figures 5, 14 and 15, the transfer seat 2 is also provided with several through grooves 24 that extend vertically for the flux spray head 25 to extend vertically. Each through groove 24 corresponds to a welding area 83.

[0129] The transfer seat 2 is equipped with a through groove 24, within which a flux spray head is installed. This flux spray head is part of the flux spraying equipment and is used to spray flux onto the welding area 83 of the solder strip 8 before welding, facilitating subsequent welding operations. The flux spray head can extend and retract vertically. Normally, it is hidden within the through groove 24. When the solder strip 8 is pressed firmly onto the first support plane 21, the flux spray head can rise to be close to the solder strip 8, and then activate the spraying mechanism to apply flux to the bottom surface of the solder strip 8. When the solder strip 8 is subsequently transferred to the battery cell 9, the side coated with flux precisely covers the battery cell 9.

[0130] The term "several through slots 24" indicates that the number of through slots 24 is one or more, and is specifically set according to the number of welding areas 83 of the welding strip 8, with the two numbers being equal.

[0131] Example 7

[0132] This embodiment provides a method for string welding of battery cells. Referring to Figures 1 to 16, a handling and positioning assembly for string welding battery cells and solder strips, as described in any of Embodiments 1 to 5, is used. Referring to Figure 17, the method includes the following steps:

[0133] Step S1. The feeding adsorption plate 1 transports the welding strip 8 from the feeding station 7 and presses it onto the transfer seat 2, and the cutting head 13 cuts the welding strip 8.

[0134] First, the loading adsorption plate 1 adsorbs the welding strip 8 at the loading station 7. The loading adsorption plate 1 is mounted on a moving mechanism, which drives the loading adsorption plate 1 to move between the loading station 7 and the transfer seat 2 to achieve the initial handling of the welding strip 8. The moving mechanism can be an XYZ three-axis moving mechanism or a robotic arm.

[0135] At the loading station 7, the coiled welding strip 8 has been cut into individual welding strips 8. The loading adsorption plate 1 descends, causing the first positioning protrusions 131 on the cutting heads 13 at both ends of the loading adsorption plate 1 to insert into the positioning holes 82 at both ends of the welding strip 8, thus positioning the welding strip 8 with the loading adsorption plate 1. The loading adsorption plate 1 continues to descend, pressing the first adsorption plane 11 onto the welding strip 8 and adsorbing and fixing it. Then the loading adsorption plate 1 rises, adsorbing and carrying the welding strip 8.

[0136] Next, the loading adsorption plate 1 is transferred to press against the transfer seat 2. The transfer of the loading adsorption plate 1 is driven by a moving mechanism, which moves the loading adsorption plate 1 from the loading station 7 to the transfer seat 2. At the same time, the welding ribbon 8 at the bottom of the loading adsorption plate 1 is also moved to the top of the transfer seat 2. During this process, the welding ribbon 8 is adsorbed and adhered to the first adsorption surface at the bottom of the loading adsorption plate 1. The two ends of the welding ribbon 8 are restricted by the first positioning protrusion 131, and the upper part of the two ends of the welding ribbon 8 is restricted by the first adsorption surface, so that the deformation of the welding ribbon 8 is reduced during the movement and it is not easy to deform.

[0137] The feeding adsorption plate 1 descends and presses against the transfer seat 2, clamping the welding strip 8 between the first support plane 21 and the first adsorption surface. The slight bending deformation that occurs in the welding strip 8 during the transportation process can be flattened, so that the welding strip 8 can eliminate the deformation and be completely flattened, preparing for the adsorption of the feeding adsorption plate 1 in the subsequent steps.

[0138] Then, the cutting head 13 descends and cuts off both ends of the welding strip 8 with positioning holes 82. After the feeding adsorption plate 1 descends and presses against the transfer seat 2, the welding strip 8 is flattened and clamped. At this time, the cutting head 13 installed at both ends of the feeding adsorption plate 1 descends under the drive of the cutting drive mechanism, taking the positioning section of the welding strip 8 down into the cutting groove 22 of the transfer seat 2. When the cutting head 13 and the groove opening of the cutting groove 22 are staggered, the welding strip 8 is cut off, and the cut part enters the cutting groove 22, leaving only the welding strip 8 section of the welding strip 8 clamped and fixed on the first support plane 21, completing the second cutting of the welding strip 8 (the first cutting is cutting the coiled welding strip 8 into a single piece of welding strip 8). After cutting, the cutting head 13 rises and retracts into the telescopic groove 14 under the drive of the cutting drive mechanism.

[0139] In this step, since the welding strip 8 is cut after being flattened and clamped, the force applied during cutting cannot cause the welding strip 8 to shift or deform, ensuring the accuracy of subsequent welding strip 8 adsorption and handling, as well as the quality of subsequent welding.

[0140] Understandably, after the feeding adsorption plate 1 adsorbs the welding ribbon 8, during its transfer to the transfer seat 2 and the cutting process, the feeding adsorption plate 1 maintains its adsorption of the welding ribbon 8 without disconnecting the adsorption until after cutting, before the feeding adsorption plate 1 returns to the feeding station 7, at which point the adsorption is disconnected and the welding ribbon 8 is released. Only after the adsorption is disconnected does the feeding adsorption plate 1 move upward.

[0141] Step S2. The feeding adsorption plate 1 releases the welding strip 8 and moves away from the transfer seat 2.

[0142] After the welding strip 8 is flattened and cut, the work of one transfer by the loading adsorption plate 1 is completed, and the welding strip 8 is no longer adsorbed. The loading adsorption plate 1 leaves the transfer seat 2 and moves to the loading station 7 to continue adsorbing the welding strip 8.

[0143] The cut welding strip 8 remains on the transfer seat 2, waiting for the material absorption plate 3 to absorb and transport the welding strip 8 to the welding base 4.

[0144] Step S3. The material dropping and adsorption plate 3 transports the cut welding strip 8 from the transfer seat 2 to the top of the welding base 4, wherein the welding base 4 is pre-transported by the battery cell 9 conveying mechanism 6 to two adjacent battery cells 9.

[0145] In this step, the unloading adsorption plate 3 and the transfer seat 2 press down together to adsorb the welding strip 8. Similar to the loading adsorption plate 1, the unloading adsorption plate 3 is mounted on another moving mechanism, which drives the unloading adsorption plate 3 to move between the transfer seat 2 and the welding base 4 to achieve the second handling of the welding strip 8. The moving mechanism can be an XYZ three-axis moving mechanism or a robotic arm.

[0146] The material suction plate 3 descends and presses against the transfer seat 2, clamping the welding strip 8 between the first support plane 21 and the second suction surface. Since the front of the welding strip 8 has been flattened, the second suction plane 31 can directly and completely adhere to the welding strip 8 and start the suction, completely adsorbing and fixing the welding strip 8 on the second suction plane 31.

[0147] Two battery cells 9 are pre-arranged on the welding base 4 and transported by a battery cell 9 conveying mechanism 6. Multiple battery cells 9 are arranged on the conveying mechanism 6, with the distance between adjacent battery cells 9 meeting the requirements for series connection. When welding is required, the conveying mechanism 6 transports two battery cells 9 to the welding base 4, with the gap between them corresponding to the position of the welding strip 8. The electrodes on the two battery cells 9 correspond to the welding area 83 of the welding strip 8, so that when the welding strip 8 is transported to the welding base 4, it can cross the gap to connect the two battery cells 9, and the welding area 83 of the welding strip 8 can be welded to the corresponding electrode.

[0148] It should be noted that the conveying of the battery cell 9 does not conflict with the handling, cutting, and re-handling of the welding strip 8, and can be completed during this period.

[0149] Step S4. The material suction plate 3 and the welding base 4 press the welding strip 8 and the two battery cells 9 together, and the elastic pressing mechanism 5 lifts the battery cells 8 up to be in close contact with the welding strip 8, ready for welding.

[0150] In this step, firstly, the material-feeding adsorption plate 3 is transferred to the welding base 4 and pressed together, clamping the welding ribbon 8 and the two battery cells 9. The material-feeding adsorption plate 3 carries the welding ribbon 8 onto the welding base 4 and presses it together. Since the conveying mechanism 6 has already conveyed the two battery cells 9 onto the welding base 4, the welding ribbon 8 is now located above the gap between the two battery cells 9, and the welding area 83 of the welding ribbon 8 corresponds to the electrode position to be welded on the two battery cells 9. After clamping, the welding ribbon 8 is pressed onto the two battery cells 9, at which point the welding ribbon 8 spans the gap between the two battery cells 9.

[0151] Because of the thickness differences between the solar cells 9, and even slight variations in thickness at different locations within the same solar cell 9, the thicker areas of the solar cell 9 limit the height of the solder ribbon 8, preventing the thinner areas of the solar cell 9 from making tight contact with the solder ribbon 8. Direct welding in this case could result in incomplete or missed solder joints. Therefore, the following steps are required to resolve this issue.

[0152] Then, the elastic clamping mechanism 5 lifts the battery cell 9 to be in close contact with the welding ribbon 8, ready for welding. After the welding ribbon 8 is pressed onto the welding base 4, each elastic clamping mechanism 5 on the welding base 4 extends and lifts the area of ​​the battery cell 9 to be welded above it so that it is in close contact with the welding ribbon 8, thereby ensuring that the battery cell 9 can be in close contact with the welding ribbon 8, so as to avoid incomplete welding and missed welding during welding.

[0153] During welding, unlike the conventional suction cup structure 10 which can only provide adsorption force but not pressure, in this embodiment, the welding strip 8 and the battery cell 9 are pressed and limited by a material drop adsorption plate 3 above them. This can both provide suction force to fix the welding strip 8 and apply pressure to the welding strip 8 and the battery cell 9 from above to press them together.

[0154] Since each elastic clamping mechanism 5 is designed for a specific welding position, the height at which each elastic clamping mechanism 5 lifts the portion of the battery cell 9 above it can be different. The elasticity of the elastic clamping mechanism 5 itself can adapt to the situation, which can prevent the battery cell 9 from being damaged due to excessive lifting force of a certain elastic clamping mechanism 5.

[0155] Step S5. The laser welding equipment emits a welding laser into the light-transmitting hole 32 to perform welding.

[0156] After the solar cell 9 is lifted and pressed against the solder ribbon 8, welding can begin. The laser welding equipment shines a laser beam through the light-transmitting hole 32 of the material suction plate 3 onto the welding area 83 of the solder ribbon 8, heating the solder ribbon 8, melting the solder on the solder ribbon 8, and welding the solder ribbon 8 to the solar cell 9 together, thus completing the welding.

[0157] In steps S3 to S5 of this method, the material-feeding adsorption plate 3 maintains adsorption on the welding ribbon 8. That is, the material-feeding adsorption plate 3 maintains adsorption throughout the entire process from adsorbing the welding ribbon 8 until the welding with the battery cell 9 is completed on the welding base 4, without disconnecting, thereby maintaining the fixation of the welding ribbon 8 throughout the entire process.

[0158] Step S6. After welding, the material suction plate 3 releases the welding strip 8 and removes it from the welding base 4.

[0159] After welding, the material suction plate 3 disconnects from the suction of the welding strip 8, releases the welding strip 8, and moves away from the welding base 4 under the drive of the moving mechanism, moving towards the transfer seat 2 to continue to suction the welding strip 8 from the transfer seat 2 and transport it to the transfer seat 2.

[0160] After the material suction plate 3 is removed, the conveying mechanism 6 of the battery cell 9 will convey the welded battery cell 9 and the welding strip 8 forward one step, and convey the unwelded battery cell 9 to the welding base 4 to wait for the material suction plate 3 to carry the welding strip 8 over to continue the welding operation.

[0161] Step S7. Repeat steps S1 to S6 until the cell stringing is completed.

[0162] Example 8

[0163] This embodiment provides a method for stringing solar cells. Based on embodiment seven, this embodiment also includes the following settings:

[0164] The transfer seat 2 is also provided with several vertically connected through slots 24 for the flux spray head 25 to extend and retract vertically, and the through slots 24 correspond one-to-one with the welding area 83.

[0165] In the process of the feeding adsorption plate 1 transporting the welding strip 8 from the feeding station 7 to the transfer seat 2, flattening the welding strip 8 and cutting it by the cutting head 13, flux is also applied to the welding area 83 on the welding strip 8 at the same time as cutting.

[0166] In this embodiment, a through groove 24 is provided on the transfer base 2 to accommodate the flux spraying head 25, thereby allowing flux to be sprayed onto the bottom of the solder strip 8 on the transfer base 2. For the specific structure, please refer to Embodiment Six; its structure will not be described again in this embodiment.

[0167] In step S1 above, after the solder strip 8 is pressed tightly against the loading adsorption plate 1 and the transfer seat 2, the cutting head 13 descends to cut the solder strip 8. At the same time, the flux spraying head rises to approach the solder strip 8 and sprays flux onto the solder strip 8. After cutting is completed, the flux spraying is also completed. The next step, namely step S2 above, can then be performed.

[0168] In the description of this specification, references to terms such as "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the described embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0169] Furthermore, the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A handling and positioning assembly for serially welding battery cells and solder strips, wherein the solder strips have a plurality of deformation holes and positioning holes at both ends, characterized in that, The handling and positioning assembly includes a loading adsorption plate, a transfer seat, a unloading adsorption plate, a welding base, and several elastic clamping mechanisms. The loading adsorption plate can move between the loading station and the transfer seat and can be pressed vertically against the transfer seat. The unloading adsorption plate can move between the transfer seat and the welding base and can be pressed vertically against either the transfer seat or the welding base. The bottom of the loading adsorption plate is provided with a first adsorption plane, and both ends of the loading adsorption plate are equipped with vertically extendable cutting heads. The cutting heads are provided with a first positioning protrusion that matches and positions the positioning hole. The transfer seat is provided with a first support plane and a cutting groove for the cutting head to extend into. The bottom of the unloading adsorption plate is provided with a second adsorption plane, and the unloading adsorption plate is provided with several light-transmitting holes corresponding to the welding area of ​​the welding strip for the welding laser to pass through. The welding base is provided with a second support plane for the battery cell conveying mechanism to fit and pass through. Several elastic clamping mechanisms are retractably arranged on the welding base, and the position of each elastic clamping mechanism corresponds to the welding area.

2. The handling and positioning assembly for serial welding of battery cells and solder strips according to claim 1, characterized in that, The transfer seat also includes a plurality of second positioning protrusions disposed on the first support plane. The positions of the second positioning protrusions correspond to the positions of the deformation holes of the flattened welding strip, and the cross-sectional dimensions of the second positioning protrusions gradually decrease from bottom to top.

3. The handling and positioning assembly for serial welding of battery cells and solder strips according to claim 2, characterized in that, The upper end of the second positioning protrusion is tapered.

4. The handling and positioning assembly for serial welding of battery cells and solder strips according to claim 3, characterized in that, The lower end of the second positioning protrusion is cylindrical, and the inner wall of the deformation hole is tangent to the lower end of the second positioning protrusion.

5. The handling and positioning assembly for serial welding of battery cells and solder strips according to claim 2, characterized in that, The first adsorption surface has a first recess for the second positioning protrusion to be inserted into; the second adsorption surface has a second recess for the second positioning protrusion to be inserted into.

6. The handling and positioning assembly for serial welding of battery cells and solder strips according to claim 1, characterized in that, The elastic clamping mechanism includes a top head and an elastic telescopic mechanism; the welding base is provided with a sliding groove, the top head is slidably disposed in the sliding groove, and the elastic telescopic mechanism is connected to the top head and can cause the top head to extend out of the sliding groove or retract into the sliding groove.

7. The handling and positioning assembly for serial welding of battery cells and solder strips according to claim 1, characterized in that, The cutting groove passes through the transfer seat.

8. The handling and positioning assembly for serial welding of battery cells and solder strips according to any one of claims 1 to 7, characterized in that, The transfer seat is also provided with several through slots that extend vertically to allow the flux spray head to extend and retract vertically, and each through slot corresponds to a welding area.

9. A method for stringing solar cells, characterized in that, A method for conveying and positioning a battery cell and welding strip for string welding, as described in any one of claims 1 to 7, comprises the following steps: the loading adsorption plate transports the welding strip from the loading station and presses it onto the transfer seat; the cutting head cuts the welding strip; the loading adsorption plate releases the welding strip and moves it away from the transfer seat; the unloading adsorption plate transports the cut welding strip from the transfer seat to above the welding base, wherein the welding base is pre-contained by a battery cell conveying mechanism with two adjacent battery cells; the unloading adsorption plate and the welding base press the welding strip and the two battery cells together; the elastic pressing mechanism lifts the battery cells to be in close contact with the welding strip; a laser welding device emits a welding laser into the light-transmitting hole for welding; after welding, the unloading adsorption plate releases the welding strip and moves it away from the welding base; the conveying mechanism conveys the welded battery cells forward and simultaneously conveys the two adjacent battery cells to the welding base; the above steps are repeated until the battery cell string welding is completed.

10. The battery cell stringing method according to claim 9, characterized in that, The transfer station is also provided with several through slots that extend and retract vertically for the flux spraying head to extend and retract. Each through slot corresponds to a welding area. The feeding adsorption plate transports the welding strip from the feeding station and presses it onto the transfer station. During the step of the cutting head cutting the welding strip, flux is applied to the welding area on the welding strip at the same time as the cutting.

Images