A kind of welding strip processing device and string welding machine

Abstract

The present application provides a kind of welding strip processing device, including several first welding strip clamping components, several second welding strip clamping components, several first welding strip cutters and several second welding strip cutters.Several first welding strip clamping components hold all the first odd number of welding strips, and the first welding strip cutter cuts off all the first odd number of welding strips at the corresponding position, to obtain several first welding strip groups.Several second welding strip clamping components hold all the first even number of welding strips, and the second welding strip cutter cuts off all the first even number of welding strips at the corresponding position, to obtain several second welding strip groups.The present application automatically divides and cuts the welding strip into first welding strip groups and second welding strip groups, and adjusts the spacing between each first welding strip group and the spacing between each second welding strip group to a predetermined spacing.In addition, the first welding strip clamping component and the second welding strip clamping component in the present application press the welding strip downward to the pressure surface to clamp the welding strip, which is suitable for clamping various types of welding strips such as round welding strips and flat welding strips.

Description

Technical Field

[0001] This invention relates to the field of battery production, specifically to a strip processing device and a string welding machine. Background Technology

[0002] The front side of the inter-branch (IBC) solar cell has no main grid lines; both the positive and negative electrode arrays are located on the back side of the cell, thereby reducing shading and improving the light conversion efficiency of the cell.

[0003] like Figure 1 The back-mounted battery cell 200 shown has a first electrode (such as a positive electrode) and a second electrode (such as a negative electrode) with opposite polarities on its back side. The first electrodes are arranged in rows to form at least two rows of first electrode rows 201, and the second electrodes are arranged in rows to form at least two rows of second electrode rows 202. The first electrode rows 201 and the second electrode rows 202 are arranged alternately.

[0004] like Figure 2 As shown, the back-mounted solar cells are welded into strings as follows: N solar cells 200 (four in the figure) are laid out sequentially with their backs facing up, and the electrode arrays of adjacent solar cells on the same straight line have opposite polarities. N+1 (five in the figure) solder ribbon groups are used to weld the N solar cells 200 into strings, wherein the first solder ribbon group (the 1st, 3rd, and 5th solder ribbon groups in the figure) and the second solder ribbon group (the 2nd and 4th solder ribbon groups in the figure) are laid out alternately.

[0005] In the traditional back-connected battery string welding process, in order to achieve staggered placement of the first and second welding strip groups, the welding strip traction mechanism needs to alternately pull and obtain the first and second welding strip groups from the welding strip feeding station, and then lay the first and second welding strip groups alternately onto the battery cells.

[0006] Traditional back-connected battery string welding process has low solder strip processing efficiency, which ultimately affects the production efficiency of battery strings. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a solder strip processing device, which adopts the following technical solution:

[0008] A solder strip processing apparatus is used to process multiple solder strips extending along a first horizontal direction to obtain several first solder strip groups and several second solder strip groups. The solder strip processing apparatus includes several first solder strip clamping assemblies, several second solder strip clamping assemblies, several first solder strip cutters, and several second solder strip cutters arranged along the first horizontal direction, wherein:

[0009] Several first solder strip clamping assemblies cooperate to clamp all the odd-numbered solder strips of multiple solder strips. A first solder strip cutter is provided between each adjacent first solder strip clamping assembly. Each first solder strip cutter is used to cut all the odd-numbered solder strips at the corresponding position to obtain several first solder strip groups.

[0010] Several second solder strip clamping assemblies cooperate to clamp all even-numbered solder strips in multiple solder strips. A second solder strip cutter is provided between each adjacent second solder strip clamping assembly. Each second solder strip cutter is used to cut all even-numbered solder strips at the corresponding position to obtain several second solder strip groups.

[0011] Before all the odd-numbered solder strips are cut, a number of first solder strip clamping assemblies and a number of second solder strip clamping assemblies are translated relative to each other in the first horizontal direction so that all the odd-numbered solder strips are offset from all the even-numbered solder strips by a predetermined distance in the first horizontal direction.

[0012] After all the odd-numbered solder strips are cut, each first solder strip clamping assembly clamps a corresponding first solder strip group. Each first solder strip clamping assembly is also configured to separate in a first horizontal direction to implement the spacing of each first solder strip group.

[0013] After all even-numbered solder strips are cut, each second solder strip clamping assembly clamps a corresponding second solder strip group. Each second solder strip clamping assembly is also configured to separate in a first horizontal direction to implement the spacing of each second solder strip group.

[0014] The first and second solder strip clamping assemblies have the same structure. The first solder strip clamping assembly includes two paired solder strip clamping parts. Each solder strip clamping part includes a mounting base plate, a fixed guide plate, a sliding clamping plate, and a sliding clamping plate drive mechanism, wherein:

[0015] The fixed guide plate is fixedly installed on the mounting base plate and extends along the second horizontal direction. The top of the fixed guide plate forms a horizontal bearing surface, and the second horizontal direction is perpendicular to the first horizontal direction.

[0016] Several clamping elements are spaced apart at the top of the sliding clamp along the second horizontal direction;

[0017] The sliding clamp drive mechanism is mounted on the mounting base plate and is connected to the sliding clamp in a transmission manner. The sliding clamp drive mechanism is used to drive the sliding clamp to slide relative to the fixed guide plate, so as to realize the position switching of the sliding clamp between the high position and the low position.

[0018] When the sliding clamp plate slides to the high position, each clamping component separates from the pressure bearing surface, and each clamping component clamps the welding strip onto the pressure bearing surface.

[0019] By coordinating the first and second solder ribbon clamping assemblies, the first solder ribbon cutter, and the second solder ribbon cutter, this invention automatically cuts the solder ribbon into first and second solder ribbon groups. It also achieves misalignment handling between the first and second solder ribbon groups and adjusts the spacing between each first solder ribbon group and each second solder ribbon group. Thus, the subsequent solder ribbon laying mechanism can lay all the first and second solder ribbon groups onto the battery cells in one go, significantly improving the production efficiency of IBC battery strings.

[0020] Furthermore, in traditional left-right positioned grippers, the flat welding strip is easily flipped due to uneven force when gripping it, resulting in damage. However, the first and second welding strip gripping components of this invention use clamping elements to press the welding strip downwards onto the pressure-bearing surface to clamp it, preventing the welding strip from flipping. This method is suitable for clamping various types of welding strips, including round and flat welding strips.

[0021] In some embodiments, the top of the fixed guide plate is provided with a plurality of pressure tongues that correspond one-to-one with the clamping members at intervals along the second horizontal direction. The pressure tongues extend outward from the fixed guide plate, and the upper surface of the pressure tongues constitutes a pressure-bearing surface. When the sliding clamping plate slides to the high position, each clamping member separates from the corresponding pressure tongue. When the sliding clamping plate slides to the low position, each clamping member clamps the welding strip on the corresponding pressure tongue.

[0022] By setting pressure tongues at the top of the fixed guide plate that correspond one-to-one with each clamping component, each clamping component can clamp the corresponding welding strip onto the corresponding pressure tongue.

[0023] In some embodiments, the welding strip clamping part further includes a connecting pin; the sliding clamp is provided with a downwardly inclined connecting hole, the first end of the connecting pin is fixedly connected to the fixed guide plate, and the second end of the connecting pin is located in the connecting hole.

[0024] A sliding clamp plate is slidably connected to a fixed guide plate using connecting pins and downwardly inclined connecting holes. When the sliding clamp plate drive mechanism drives the sliding clamp plate, the sliding clamp plate slides at an angle relative to the fixed guide plate. When the sliding clamp plate slides upward, each clamping element moves to a position diagonally above the corresponding pressure tongue, thereby ensuring that the welding strip can be smoothly pulled onto the pressure tongue. When the sliding clamp plate slides downward, each clamping element presses the welding strip tightly onto the pressure tongue.

[0025] In some embodiments, the welding strip clamping part further includes a first limiting member and a second limiting member disposed at both ends of the fixed guide plate. The first limiting member is used to limit the first end of the sliding clamp, and the second limiting member is used to limit the second end of the sliding clamp.

[0026] By setting limiting components at both ends of the fixed guide plate, the sliding clamp is limited, thereby adjusting the lifting stroke of the sliding clamp.

[0027] In some embodiments, the welding strip clamping part further includes a first adjusting screw and a second adjusting screw arranged in pairs at both ends of the mounting base plate; the first end of the fixed guide plate is height-adjustably connected to the first adjusting screw, and the second end of the fixed guide plate is height-adjustably connected to the second adjusting screw.

[0028] By setting the fixed guide plate on the first adjusting screw and the second adjusting screw, the height of the fixed guide plate can be adjusted, thereby enabling the welding strip clamping part to clamp the welding strip at different height positions and improving the clamping flexibility of the welding strip clamping part.

[0029] In some embodiments, the welding strip clamping part further includes a guide comb disposed on a fixed guide plate, and the guide comb is provided with a plurality of welding strip guide grooves corresponding one-to-one with the clamping member at intervals along the second horizontal direction.

[0030] By setting up guide combs, the welding strip is guided, allowing it to be smoothly clamped by the corresponding clamping parts.

[0031] In some embodiments, the welding strip processing apparatus of the present invention further includes a base and a staggered slide rail extending along a first horizontal direction, a first welding strip group spacing slide rail, and a second welding strip group spacing slide rail, wherein: the staggered slide rail is disposed on the base; the first welding strip group spacing slide rail is slidably connected to the staggered slide rail, and a plurality of first welding strip clamping assemblies and a plurality of first welding strip cutters are all connected to the first welding strip group spacing slide rail; the second welding strip group spacing slide rail is disposed on the base, and a plurality of second welding strip clamping assemblies and a plurality of second welding strip cutters are all connected to the second welding strip group spacing slide rail; all odd-numbered welding strips... Before the strips are cut, the first strip group spacing slides along the offset slide to offset all odd-numbered strips from all even-numbered strips in the first horizontal direction by a predetermined distance. After all odd-numbered strips are cut, several first strip clamping assemblies and several first strip cutters slide apart along the first strip group spacing slide to separate each first strip group. After all even-numbered strips are cut, several second strip clamping assemblies and several second strip cutters slide apart along the second strip group spacing slide to separate each second strip group.

[0032] By setting a staggered slide rail, a first strip group spacing slide rail, and a second strip group spacing slide rail on the base, and arranging all the first strip clamping assemblies, all the first strip cutters, all the second strip clamping assemblies, and the second strip cutters on the first strip group spacing slide rail and the second strip group spacing slide rail respectively, the staggered arrangement between the first strip clamping assemblies and the second strip clamping assemblies, as well as the spacing between each first strip clamping assembly and each second strip clamping assembly, is achieved.

[0033] In some embodiments, the solder strip processing apparatus further includes a misalignment driving component, a first spacing driving component, and a second spacing driving component disposed on a base, wherein: the misalignment driving component is used to drive the first solder strip group spacing slide rail to slide along the misalignment slide rail; the first spacing driving component is used to drive a plurality of first solder strip clamping components and a plurality of first solder strip cutters to slide apart along the first solder strip group spacing slide rail; and the second spacing driving component is used to drive a plurality of second solder strip clamping components and a plurality of second solder strip cutters to slide apart along the second solder strip group spacing slide rail.

[0034] As can be seen, by setting up the misalignment drive component, automatic misalignment between the first and second solder ribbon clamping components can be achieved. By setting up the first and second spacing drive components, automatic spacing between the first solder ribbon clamping components and between the second solder ribbon clamping components is achieved.

[0035] In some embodiments, the first ribbon clamping assembly located at the rearmost end is fixed to the first ribbon group spacing slide rail, and the remaining first ribbon clamping assemblies and the first ribbon cutter are slidably connected to the first ribbon group spacing slide rail. The first ribbon cutter is connected to two adjacent first ribbon clamping assemblies via first connecting rods, wherein at least one end of the first connecting rod is movably connected to the first ribbon cutter or the first ribbon clamping assembly, and the first connecting rod can drive the first ribbon cutter to slide in a first horizontal direction. The driving end of the first spacing drive assembly is connected to the first ribbon clamping assembly located at the foremost end, and the first spacing drive assembly drives the first ribbon clamping assembly located at the foremost end to slide, thereby causing the plurality of first ribbon clamping assemblies and the plurality of first ribbon cutters to slide apart. The second ribbon clamping assembly located at the rearmost end is fixed to the second ribbon group spacing slide rail, and the remaining second ribbon clamping assemblies and the second ribbon cutter are slidably connected to the second ribbon group spacing slide rail. The second ribbon cutter is connected to each of the two adjacent second ribbon clamping assemblies via a second connecting rod. At least one end of each second connecting rod is movably connected to either the second ribbon cutter or a second ribbon clamping assembly, and the connecting rod can drive the second ribbon cutter to slide in a first horizontal direction. The driving end of the second pitching drive assembly is connected to the foremost second ribbon clamping assembly, which drives the foremost second ribbon clamping assembly to slide, thereby causing several second ribbon clamping assemblies and several second ribbon cutters to slide apart.

[0036] By configuring the installation and connection methods of the first solder ribbon clamping assembly and the first solder ribbon cutter, it is achieved that simply driving the first solder ribbon clamping assembly at the foremost position to slide will cause all the first solder ribbon clamping assemblies and all the first solder ribbon cutters to slide apart. Similarly, by configuring the installation and connection methods of the second solder ribbon clamping assembly and the second solder ribbon cutter, it is achieved that simply driving the second solder ribbon clamping assembly at the foremost position to slide will cause all the second solder ribbon clamping assemblies and all the second solder ribbon cutters to slide apart.

[0037] In some embodiments, at least one end of the first connecting rod is provided with a first connecting waist hole extending along a first horizontal direction, and a first connecting pin is provided on the corresponding first welding strip clamping assembly or the first welding strip cutter. The first connecting pin passes through the first connecting waist hole and can slide within the first connecting waist hole. At least one end of the second connecting rod is provided with a second connecting waist hole extending along a first horizontal direction, and a second connecting pin is provided on the corresponding second welding strip clamping assembly or the second welding strip cutter. The second connecting pin passes through the second connecting waist hole and can slide within the second connecting waist hole.

[0038] A movable connection is achieved between the first ribbon cutter and two adjacent first ribbon clamping assemblies, meaning that the first ribbon cutter and the two adjacent first ribbon clamping assemblies can achieve relative displacement within a certain stroke. Similarly, a movable connection is achieved between the second ribbon cutter and two adjacent second ribbon clamping assemblies, meaning that the second ribbon cutter and the two adjacent second ribbon clamping assemblies can achieve relative displacement within a certain stroke.

[0039] In some embodiments, the first ribbon clamping assembly at the foremost position is located in front of the second ribbon clamping assembly at the foremost position, and the first ribbon clamping assembly at the foremost position is configured to be able to move up and down in the vertical direction; or, the second ribbon clamping assembly at the foremost position is located in front of the first ribbon clamping assembly at the foremost position, and the second ribbon clamping assembly at the foremost position is configured to be able to move up and down in the vertical direction.

[0040] The first or second welding strip clamping group at the foremost position is configured to be liftable, which can enable it to avoid the welding strip traction mechanism.

[0041] The present invention also provides a string welding machine for welding solar cells into strings. The back of each solar cell has staggered first and second electrode rows. The string welding machine includes a welding conveying mechanism, a solar cell laying mechanism, a welding strip traction mechanism, a welding strip processing device as described in any one of the preceding claims, a welding strip handling mechanism, and a welding mechanism. The welding conveying mechanism is used to carry at least the solar cells and welding strips. The solar cell laying mechanism is used to lay several solar cells with a first predetermined spacing, back side up, on the welding conveying mechanism. The polarities of the electrode rows of adjacent solar cells on the same straight line are opposite. The welding strip traction mechanism is used to pull multiple welding strips extending along a first horizontal direction to the welding strip processing device. The welding strip processing device is used to handle all the welding strips in the string. Several solder ribbons are staggered from all even-numbered solder ribbons in a first horizontal direction by a predetermined distance, and all odd-numbered solder ribbons and all even-numbered solder ribbons are alternately cut to obtain several first solder ribbon groups and several second solder ribbon groups. The solder ribbon processing device is also used to adjust the spacing between each first solder ribbon group and the spacing between each second solder ribbon group to a second predetermined spacing. The solder ribbon transport mechanism is used to stack several first solder ribbon groups and several second solder ribbon groups on the solder ribbon processing device onto several laid-out solar cells, such that each first solder ribbon group is stacked on the odd-numbered electrode row of the corresponding solar cell, and each second solder ribbon group is stacked on the even-numbered electrode row of the corresponding solar cell. The welding mechanism is used to weld the stacked solder ribbon groups and solar cells into strings.

[0042] By coordinating the welding conveying mechanism, the cell laying mechanism, the welding strip traction mechanism, the welding strip processing device, the welding strip handling mechanism, and the welding mechanism, the string welding machine provided by this invention realizes the automatic welding of IBC cells into strings. Attached Figure Description

[0043] Figure 1 This is a structural diagram of a back-mounted solar cell.

[0044] Figure 2 This is a schematic diagram of the structure of four back-to-back solar cells welded into a string by a solder strip assembly.

[0045] Figure 3 This is a schematic diagram of the structure of the solder strip processing device according to an embodiment of the present invention;

[0046] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0047] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle;

[0048] Figure 6 This is a schematic diagram of the first and second solder strip clamping components clamping the solder strip in one embodiment of the present invention.

[0049] Figure 7 This is a schematic diagram of the solder strip clamping part in an embodiment of the present invention from one perspective;

[0050] Figure 8 for Figure 7 A magnified view of a portion of the image;

[0051] Figure 9 This is a schematic diagram of the solder strip clamping part in an embodiment of the present invention from another perspective;

[0052] Figures 1 to 9 The following reference numerals are included:

[0053] First welding strip clamping assembly 1, second welding strip clamping assembly 2, first welding strip cutter 3, second welding strip cutter 4, misaligned slide rail 5, first welding strip group spacing slide rail 6, second welding strip group spacing slide rail 7, first connecting rod 8; mounting base plate 11, fixed guide plate 12, sliding clamping plate 13, sliding clamping plate drive mechanism 14, pressure-bearing tongue plate 15, clamping component 16, guide comb 17, first adjusting bolt 18, second adjusting bolt 19, connecting pin 110, first limiting component 111, second limiting component 112, guide groove 171;

[0054] Battery cell 200, first electrode row 201, second electrode row 202. Detailed Implementation

[0055] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] In the traditional back-connected battery string welding process, in order to achieve staggered placement of the first and second welding strip groups, the welding strip traction mechanism needs to alternately pull and obtain the first and second welding strip groups from the welding strip feeding station, and then lay the first and second welding strip groups alternately onto the battery cells.

[0057] Traditional back-connected battery string welding process has low solder strip processing efficiency, which ultimately affects the production efficiency of battery strings.

[0058] In view of this, the present invention provides a welding strip processing device, which can automatically cut multiple welding strips along a first horizontal direction into a first welding strip group and a second welding strip group by pulling out the welding strip traction mechanism, and realize the misalignment processing between the first welding strip group and the second welding strip group, as well as the adjustment of the spacing between each first welding strip group and the spacing between each second welding strip group.

[0059] In this way, the subsequent ribbon laying mechanism can lay all the first and second ribbon groups onto the battery cells at once, thereby greatly improving the production efficiency of IBC battery strings.

[0060] like Figures 3 to 5 As shown, the solder strip processing device provided by the present invention includes a plurality of first solder strip clamping assemblies 1, a plurality of second solder strip clamping assemblies 2, a plurality of first solder strip cutters 3, and a plurality of second solder strip cutters 4 arranged along a first horizontal direction (as shown by the X-axis direction in the figure), wherein:

[0061] Several first solder strip clamping components 1 cooperate to clamp all the odd-numbered solder strips of multiple solder strips. A first solder strip cutter 3 is provided between each adjacent first solder strip clamping component 1. Each first solder strip cutter 3 is used to cut all the odd-numbered solder strips at the corresponding position, thereby obtaining several first solder strip groups.

[0062] Several second welding strip clamping components 2 cooperate to clamp all the even-numbered welding strips in multiple welding strips. A second welding strip cutter 4 is provided between each adjacent second welding strip clamping component 2. Each second welding strip cutter 4 is used to cut all the even-numbered welding strips at the corresponding position, thereby obtaining several second welding strip groups.

[0063] Before all the odd-numbered solder strips are cut, a number of first solder strip clamping assemblies 1 and a number of second solder strip clamping assemblies 2 are translated relative to each other in the first horizontal direction so that all the odd-numbered solder strips are staggered from all the even-numbered solder strips in the first horizontal direction by a predetermined distance.

[0064] After all the odd-numbered solder strips are cut, each first solder strip clamping assembly 1 clamps a corresponding first solder strip group. Each first solder strip clamping assembly 1 is also configured to separate in a first horizontal direction to implement the separation of each first solder strip group.

[0065] After all even-numbered solder strips are cut, each second solder strip clamping assembly 2 clamps a corresponding second solder strip group. Each second solder strip clamping assembly 2 is also configured to separate in a first horizontal direction to implement the spacing of each second solder strip group.

[0066] To enable those skilled in the art to better understand the structure and working principle of the welding strip processing device provided by the present invention, the working process of the welding strip processing device provided by the embodiments of the present invention will be described illustratively below.

[0067] like Figure 6 As shown, in one embodiment, the solder strip processing device provided by the present invention includes six first solder strip clamping assemblies 1, six second solder strip clamping assemblies 2, five first solder strip cutters 3 and five second solder strip cutters 4, wherein: a first solder strip cutter 3 is provided between each two adjacent first solder strip clamping assemblies 1, and a second solder strip cutter 4 is provided between each two adjacent second solder strip clamping assemblies 2.

[0068] Figure 6The process of cutting and adjusting the solder strip in the solder strip processing device in this embodiment is as follows:

[0069] First, a welding strip traction mechanism is used to pull multiple welding strips (17 in the figure) extending along the first horizontal direction (X-axis direction in the figure) onto the welding strip processing device.

[0070] Control the first solder strip clamping assembly 1 and the second solder strip clamping assembly 2 to clamp the solder strips, wherein: six first solder strip clamping assemblies 1 cooperate to clamp all the odd-numbered solder strips from different positions, and six second solder strip clamping assemblies 2 cooperate to clamp all the even-numbered solder strips from different positions.

[0071] The six first strip clamping assemblies 1 are controlled to translate relative to the six second strip clamping assemblies 2, so that all the odd-numbered strips are offset from all the even-numbered strips in the first horizontal direction by a predetermined distance.

[0072] Next, the five first solder strip cutters 3 and the five second solder strip cutters 4 are controlled to simultaneously cut all the odd-numbered solder strips and all the even-numbered solder strips from their corresponding positions. In this way, six first solder strip groups and six second solder strip groups are obtained. Furthermore, each first solder strip group is clamped on its corresponding first solder strip clamping assembly 1, and each second solder strip group is clamped on its corresponding second solder strip clamping assembly 2.

[0073] Finally, the six first solder strip clamping assemblies 1 are controlled to translate and separate, thereby adjusting the spacing between the six first solder strip groups to a predetermined spacing. The six second solder strip clamping assemblies 2 are also controlled to translate and separate, thereby adjusting the spacing between the six second solder strip groups to a predetermined spacing.

[0074] In this invention, the first solder strip clamping assembly 1 and the second solder strip clamping assembly 2 have the same structure, both including two paired solder strip clamping parts. Taking the first solder strip clamping assembly 1 as an example, after the solder strip is pulled onto the solder strip processing device, the two solder strip clamping parts of the first solder strip clamping assembly 1 cooperate to clamp all the odd-numbered solder strips at corresponding positions. After all the odd-numbered solder strips are cut, the two solder strip clamping parts of the first solder strip clamping assembly 1 clamp the two ends of the corresponding first solder strip group.

[0075] As those skilled in the art will understand, traditional left-right oriented grippers have no problem gripping round solder strips. However, when gripping flat solder strips, the two sides of the flat solder strip are prone to flipping due to uneven force, resulting in damage to the solder strip.

[0076] Therefore, the present invention improves the two solder strip clamping parts of the first solder strip clamping assembly 1 and the second solder strip clamping assembly 2. For example... Figure 7As shown, the welding strip clamping part of the present invention includes a mounting base plate 11, a fixed guide plate 12, a sliding clamping plate 13, and a sliding clamping plate driving mechanism 14, wherein:

[0077] The fixed guide plate 12 is fixedly installed on the mounting base plate 11 and extends along the second horizontal direction (Y direction in the figure). The top of the fixed guide plate 12 forms a horizontal bearing surface, and the second horizontal direction is perpendicular to the first horizontal direction.

[0078] Several clamping elements 16 are provided at intervals along the second horizontal direction at the top of the sliding clamp 13.

[0079] The sliding clamp drive mechanism 14 is mounted on the mounting base plate 11 and is connected to the sliding clamp 13 in a transmission manner. The sliding clamp drive mechanism 14 is used to drive the sliding clamp 13 to slide relative to the fixed guide plate 12, so as to realize the position switching of the sliding clamp 13 between a high position and a low position. Optionally, the sliding clamp 13 can be slidably connected to the fixed guide plate 12 via a vertical guide rail. Of course, the sliding clamp 13 can also be connected only to the moving part of the sliding clamp drive mechanism 14.

[0080] When the sliding clamp 13 slides to the high position, each clamping element 16 separates from the pressure bearing surface. When the sliding clamp 13 slides to the low position, each clamping element 16 clamps the welding strip to the pressure bearing surface.

[0081] Taking the first welding strip clamping assembly 1 as an example, after the welding strip is pulled onto the welding strip processing device, each clamping member 16 presses the corresponding odd-numbered welding strip onto the pressure surface at the corresponding position. After all the odd-numbered welding strips are cut, each clamping member 16 clamps the corresponding end of the cut-off first welding strip.

[0082] The first welding strip clamping assembly 1 and the second welding strip clamping assembly 2 of this invention use clamping members to press the welding strip downwards onto the pressure-bearing surface to clamp the welding strip. In this way, the welding strip will not flip due to uneven force, and it is suitable for clamping various types of welding strips such as round welding strips and flat welding strips.

[0083] like Figure 7 and Figure 8 As shown, optionally, the top of the fixed guide plate 12 is provided with a plurality of pressure-bearing tongues 15 at intervals along the second horizontal direction, each corresponding to a clamping member 16. The pressure-bearing tongues 15 extend outward from the fixed guide plate 12, and the upper surface of the pressure-bearing tongues 16 constitutes a pressure-bearing surface. Optionally, the pressure-bearing tongues 15 are integrally formed on the top of the fixed guide plate 12.

[0084] When the sliding clamp 13 slides to the high position, each clamping element 16 separates from the corresponding pressure tongue 15, allowing the welding strip to be pulled onto the pressure tongue. When the sliding clamp 13 slides to the low position, each clamping element 16 clamps the welding strip onto the corresponding pressure tongue. Optionally, the clamping element 16 is a pressure plate or pressure sheet. To ensure that each welding strip is clamped, the pressure plate or pressure sheet can be made of elastic material. It is detachably mounted on the top of the sliding clamp 13 by screws.

[0085] like Figure 8 As shown, optionally, the welding strip clamping part also includes a connecting pin 110. The sliding clamping plate 13 is provided with a downwardly inclined connecting hole, the first end of the connecting pin 110 is fixedly connected to the fixed guide plate 12, and the second end of the connecting pin 110 is located in the connecting hole.

[0086] When the sliding clamping plate drive mechanism 14 drives the sliding clamping plate 13, the sliding clamping plate 13 slides at an angle relative to the fixed guide plate 12 under the guidance of the connecting pin 110. Specifically, when the sliding clamping plate 13 slides upward at an angle under the guidance of the connecting pin 110, each clamping member 16 moves to a position diagonally above the corresponding pressure tongue 15, thereby avoiding the welding strip and ensuring that the welding strip can be smoothly pulled onto the pressure tongue 15. When the sliding clamping plate 13 slides downward at an angle under the guidance of the connecting pin 110, each clamping member 16 presses the welding strip onto the pressure tongue 15.

[0087] like Figure 7 As shown, optionally, the welding strip clamping part further includes a first limiting member 111 and a second limiting member 112 disposed at both ends of the fixed guide plate 12. The first limiting member 111 is used to limit the first end of the sliding clamp 13, and the second limiting member 112 is used to limit the second end of the sliding clamp 13. The first limiting member 111 is used to prevent the movable clamp from rising excessively, and the second limiting member 112 is used to prevent the movable clamp from falling excessively.

[0088] By using the first limiting member 111 and the second limiting member 112 to block and limit the sliding clamp 13 from both sides, the lifting and lowering stroke of the sliding clamp 13 during the tilting and sliding process is limited to a predetermined range, preventing the sliding clamp 13 from lifting and lowering excessively.

[0089] Continue to refer to Figure 7 As shown, optionally, the welding strip clamping part also includes a first adjusting screw 18 and a second adjusting screw 19 paired at both ends of the mounting base plate 11. The first end of the fixed guide plate 12 is connected to the first adjusting screw 18, and the second end of the fixed guide plate 12 is connected to the second adjusting screw 19.

[0090] The height of the fixed guide plate 12 can be adjusted by the first adjusting screw 18 and the second adjusting screw 19, thereby enabling the welding strip clamping part to clamp the welding strip at different height positions and improving the clamping flexibility of the welding strip clamping part.

[0091] like Figures 7 to 9 As shown, optionally, the welding strip clamping part also includes a guide comb 17 disposed on the fixed guide plate 12. The guide comb 17 is provided with a plurality of welding strip guide grooves 171 at intervals along the second horizontal direction, each corresponding to a clamping member 16. Each welding strip guide groove 171 is used to guide a welding strip so that the welding strip can be clamped by the corresponding clamping member 16.

[0092] like Figure 5 As shown, optionally, the solder strip processing device of the present invention further includes a base and a staggered slide rail 5 extending along a first horizontal direction, a first solder strip group spacing slide rail 6, and a second solder strip group spacing slide rail 7, wherein:

[0093] The misaligned slide rail 5 is set on the base, and the first strip group spacing slide rail 6 is slidably connected to the misaligned slide rail 5. The first strip clamping assembly 1 and the first strip cutter 3 are both connected to the first strip group spacing slide rail 6.

[0094] The second strip group spacing slide rail 7 is mounted on the base, and the second strip clamping assembly 2 and the second strip cutter 4 are both connected to the second strip group spacing slide rail 7.

[0095] Before all the odd-numbered weld strips are cut, the first weld strip group is controlled to slide along the offset slide rail 6 so that all the odd-numbered weld strips are offset from all the even-numbered weld strips in the first horizontal direction by a predetermined distance.

[0096] After all the odd-numbered solder strips are cut, the first solder strip clamping assembly 1 and the first solder strip cutter 3 are controlled to slide apart along the first solder strip group spacing slide rail 6, thereby adjusting the spacing between the first solder strip groups to a predetermined spacing. Furthermore, after spacing, the first solder strip cutter 3 separates from the two adjacent first solder strip clamping assemblies 1, that is, there is a large gap between the first solder strip cutter 3 and the ends of the two first solder strip groups on both sides, thus allowing the subsequent solder strip handling device to smoothly clamp and press the ends of the first solder strip groups.

[0097] After all even-numbered weld strips are cut, the second weld strip clamping assemblies 2 and the second weld strip cutters 4 are controlled to slide apart along the second weld strip group spacing slide rail 7, thereby adjusting the spacing between the second weld strip groups to a predetermined spacing. Similarly, after spacing, the second weld strip cutter 4 is separated from the two adjacent second weld strip clamping assemblies 2, that is, there is a large gap between the second weld strip cutter 4 and the ends of the two second weld strip groups on both sides, so that the subsequent weld strip conveying device can smoothly perform clamping and pressing on the ends of the second weld strip groups.

[0098] Optionally, the solder strip processing apparatus of the present invention further includes a misalignment driving assembly, a first spacing driving assembly, and a second spacing driving assembly disposed on a base, wherein: the misalignment driving assembly is used to drive the first solder strip group spacing slide rail 6 to slide along the misalignment slide rail 5. The first spacing driving assembly is used to drive each first solder strip clamping assembly 1 and each first solder strip cutter 3 to slide apart along the first solder strip group spacing slide rail 6. The second spacing driving assembly is used to drive each second solder strip clamping assembly 2 and each second solder strip cutter 4 to slide apart along the second solder strip group spacing slide rail 7.

[0099] like Figure 3 and Figure 4 As shown, optionally, the first ribbon clamping assembly 1 located at the rear end is fixed on the first ribbon group spacing slide rail 6, and the remaining first ribbon clamping assemblies 1 and all the first ribbon cutters 3 are slidably connected to the first ribbon group spacing slide rail 6. The first ribbon cutter 3 is connected to two adjacent first ribbon clamping assemblies 1 via first connecting rods 8, wherein at least one end of the first connecting rod 8 is movably connected to the first ribbon cutter 3 or the first ribbon clamping assembly 1, and the first connecting rod 8 can drive the first ribbon cutter 3 to slide in the first horizontal direction.

[0100] The drive end of the first pitch drive assembly is connected to the first ribbon clamping assembly 1 located at the foremost end. The first pitch drive assembly drives the first ribbon clamping assembly 1 located at the foremost end to slide, thereby causing each first ribbon clamping assembly and each first ribbon cutter 3 to slide apart.

[0101] Initially, each of the first solder strip clamping components 1 and each of the first solder strip cutters 3 are close together. After the first cutter 3 has finished cutting all the odd-numbered solder strips and obtained several first solder strip groups, the first spacing drive component drives the first solder strip clamping component 1 located at the foremost end to slide away from the first solder strip clamping component 1 located at the rearmost end, thereby causing each of the first solder strip clamping components 1 and each of the first solder strip cutters 3 to slide apart until the spacing between the first solder strip groups is adjusted to a predetermined spacing, and each of the first solder strip cutters 3 is separated from the two adjacent first solder strip clamping components 1.

[0102] By setting the installation and connection methods of the first ribbon clamping assembly 1 and the first ribbon cutter 3, it is achieved that only the first ribbon clamping assembly 1 at the front end needs to be driven to slide, which can drive all the first ribbon clamping assemblies 1 and all the first ribbon cutters 3 to slide apart.

[0103] Similarly, the second strip clamping assembly 2 located at the rear end is fixed on the second strip group spacing slide rail 7, and the remaining second strip clamping assemblies 2 and all the second strip cutters 4 are slidably connected to the second strip group spacing slide rail 7. The second strip cutter 4 is connected to each of the two adjacent second strip clamping assemblies 2 via a second connecting rod, wherein at least one end of the second connecting rod is movably connected to the second strip cutter 4 or the second strip clamping assembly 2, and the second connecting rod can drive the second strip cutter 4 to slide in the first horizontal direction.

[0104] The drive end of the second pitch drive assembly is connected to the second ribbon clamping assembly 2 located at the foremost end. The second pitch drive assembly drives the second ribbon clamping assembly 2 located at the foremost end to slide, thereby causing each second ribbon clamping assembly 2 and each second ribbon cutter 4 to slide apart.

[0105] Initially, the second solder strip clamping assemblies 2 and the second solder strip cutters 4 are close together. After the second cutters 4 have cut all even-numbered solder strips to obtain several second solder strip groups, the second spacing drive assembly drives the foremost second solder strip clamping assembly 2 to slide away from the rearmost second solder strip clamping assembly 2, thereby causing the second solder strip clamping assemblies 2 and the second solder strip cutters 4 to slide apart until the spacing between the second solder strip groups is adjusted to a predetermined spacing, and each second solder strip cutter 4 separates from the two adjacent second solder strip clamping assemblies 2.

[0106] By setting the installation and connection methods of the second ribbon clamping assembly 2 and the second ribbon cutter 4, it is achieved that only the sliding of the second ribbon clamping assembly 2 located at the front end is required to drive all the second ribbon clamping assemblies 2 and all the second ribbon cutters 4 to slide apart.

[0107] To achieve the movable connection between the first ribbon cutter 3 and the two adjacent first ribbon clamping assemblies 3, such as Figure 4 As shown, optionally, at least one end of the first connecting rod 8 is provided with a first connecting waist hole extending in the first horizontal direction, and the corresponding first welding strip clamping assembly 1 or first welding strip cutter 3 is provided with a first connecting pin, which is inserted into the first connecting waist hole and can slide in the first connecting waist hole.

[0108] Similarly, at least one end of the second connecting rod is provided with a second connecting waist hole extending along the first horizontal direction, and the corresponding second welding strip clamping assembly 2 or the second welding strip cutter 4 is provided with a second connecting pin, which is inserted into the second connecting waist hole and can slide within the second connecting waist hole.

[0109] Optionally, in order to avoid collisions between the welding strip traction mechanism and the first welding strip clamping component 1 or the second welding strip clamping component 2 located at the foremost end when the welding strip is being pulled onto the welding strip processing device, the first welding strip clamping component 1 or the second welding strip clamping component 2 located at the foremost end is configured to be liftable.

[0110] When it is necessary to pull the welding strip onto the welding strip processing device, first control the first welding strip clamping assembly 1 or the second welding strip clamping assembly 2 located at the foremost position to descend to a low position, thereby avoiding the welding strip pulling mechanism. After the welding strip is pulled, control the first welding strip clamping assembly 1 or the second welding strip clamping assembly 2 located at the foremost position to rise and reset.

[0111] The present invention also provides a string welding machine for welding solar cells into strings. The back of the solar cells is provided with staggered first and second electrode rows (i.e., IBC solar cells). The string welding machine includes a welding conveying mechanism, a solar cell laying mechanism, a welding strip traction mechanism, a welding strip processing device as described in any of the above embodiments, a welding strip transport mechanism, and a welding mechanism, wherein:

[0112] The welding conveyor is used to carry at least the battery cells and the welding strip assembly.

[0113] The cell laying mechanism is used to lay several cells with a first predetermined spacing on a welding conveying mechanism with their backs facing up, and the polarities of the electrode rows of adjacent cells on the same straight line are opposite.

[0114] The welding strip traction mechanism is used to pull multiple welding strips extending along a first horizontal direction onto the welding strip processing mechanism.

[0115] The solder strip processing device is used to offset all the odd-numbered solder strips from all the even-numbered solder strips in a first horizontal direction by a predetermined distance, and to alternately cut all the odd-numbered solder strips and all the even-numbered solder strips to obtain a plurality of first solder strip groups and a plurality of second solder strip groups. The solder strip processing device is also used to adjust the spacing between each first solder strip group and the spacing between each second solder strip group to a second predetermined spacing.

[0116] The ribbon handling mechanism is used to stack several first ribbon groups and several second ribbon groups on the ribbon processing device onto several laid-out solar cells, such that each first ribbon group is stacked on the odd-numbered electrode row of the corresponding solar cell, and each second ribbon group is stacked on the even-numbered electrode row of the corresponding solar cell.

[0117] The welding mechanism is used to weld stacked strips and battery cells into strings.

[0118] By coordinating the welding conveying mechanism, the cell laying mechanism, the welding strip traction mechanism, the welding strip processing device, the welding strip handling mechanism, and the welding mechanism, the string welding machine provided by this invention realizes the automatic welding of IBC cells into strings.

[0119] The present invention has been described above in sufficient detail and with certain specificities. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of the invention should fall within the protection scope of the invention. The scope of protection claimed by the present invention is defined by the claims, and not by the above descriptions in the embodiments.

Claims

1. A welding strip processing device, characterized in that, For processing multiple solder strips extending along a first horizontal direction to obtain several first solder strip groups and several second solder strip groups, the solder strip processing device includes several first solder strip clamping assemblies, several second solder strip clamping assemblies, several first solder strip cutters, and several second solder strip cutters arranged along the first horizontal direction, wherein: A plurality of first solder strip clamping assemblies cooperate to clamp all the odd-numbered solder strips of the plurality of solder strips. A first solder strip cutter is provided between each adjacent first solder strip clamping assembly. Each first solder strip cutter is used to cut all the odd-numbered solder strips at a corresponding position to obtain a plurality of first solder strip groups. A plurality of second solder strip clamping assemblies cooperate to clamp all the even-numbered solder strips of the plurality of solder strips. A second solder strip cutter is provided between each adjacent second solder strip clamping assembly. Each second solder strip cutter is used to cut all the even-numbered solder strips at a corresponding position to obtain a plurality of second solder strip groups. Before all the odd-numbered solder strips are cut, a plurality of the first solder strip clamping assemblies and a plurality of the second solder strip clamping assemblies are translated relative to each other in the first horizontal direction, so that all the odd-numbered solder strips are staggered from all the even-numbered solder strips in the first horizontal direction by a predetermined distance. After all the odd-numbered solder strips are cut, each of the first solder strip clamping components clamps a corresponding first solder strip group, and each of the first solder strip clamping components is also configured to separate in the first horizontal direction to implement the separation of each of the first solder strip groups. After all even-numbered solder strips are cut, each of the second solder strip clamping assemblies clamps a corresponding second solder strip group, and each of the second solder strip clamping assemblies is also configured to separate in the first horizontal direction to implement the spacing of each of the second solder strip groups; The first solder strip clamping assembly has the same structure as the second solder strip clamping assembly. The first solder strip clamping assembly includes two paired solder strip clamping parts. Each solder strip clamping part includes a mounting base plate, a fixed guide plate, a sliding clamping plate, and a sliding clamping plate driving mechanism, wherein: The fixed guide plate is fixedly installed on the mounting base plate and extends along the second horizontal direction. The top of the fixed guide plate forms a horizontal bearing surface, and the second horizontal direction is perpendicular to the first horizontal direction. The top of the sliding clamp is provided with a plurality of clamping elements at intervals along the second horizontal direction; The sliding clamp driving mechanism is disposed on the mounting base plate and is connected to the sliding clamp in a transmission manner. The sliding clamp driving mechanism is used to drive the sliding clamp to slide relative to the fixed guide plate, so as to realize the position switching of the sliding clamp between the high position and the low position. When the sliding clamping plate slides to the high position, each of the clamping members separates from the pressure bearing surface. When the sliding clamping plate slides to the low position, each of the clamping members clamps the welding strip onto the pressure bearing surface.

2. The welding strip processing apparatus as described in claim 1, characterized in that: The top of the fixed guide plate is provided with a plurality of pressure-bearing tongues that correspond one-to-one with the clamping member along the second horizontal direction. The pressure-bearing tongues extend outward from the fixed guide plate, and the upper surface of the pressure-bearing tongues constitutes the pressure-bearing surface. When the sliding clamping plate slides to the high position, each clamping member separates from the corresponding pressure-bearing tongue. When the sliding clamping plate slides to the low position, each clamping member clamps the welding strip onto the corresponding pressure-bearing tongue.

3. The welding strip processing apparatus as described in claim 1, characterized in that: The welding strip clamping part also includes a connecting pin; The sliding clamp is provided with a downwardly inclined connecting hole, the first end of the connecting pin is fixedly connected to the fixed guide plate, and the second end of the connecting pin is located in the connecting hole.

4. The welding strip processing apparatus as described in claim 3, characterized in that: The welding strip clamping part further includes a first limiting member and a second limiting member disposed at both ends of the fixed guide plate. The first limiting member is used to limit the first end of the sliding clamp, and the second limiting member is used to limit the second end of the sliding clamp.

5. The welding strip processing apparatus as described in claim 1, characterized in that: The welding strip clamping part also includes a first adjusting screw and a second adjusting screw that are paired and arranged at both ends of the mounting base plate; The first end of the fixed guide plate is height-adjustably connected to the first adjusting screw, and the second end of the fixed guide plate is height-adjustably connected to the second adjusting screw.

6. The welding strip processing apparatus as described in claim 1, characterized in that: The welding strip clamping part also includes a guide comb disposed on the fixed guide plate, and the guide comb is provided with a plurality of welding strip guide grooves that correspond one-to-one with the clamping member along the second horizontal direction.

7. The welding strip processing apparatus as described in claim 1, characterized in that: The welding strip processing device further includes a base and a staggered slide rail extending along the first horizontal direction, a first welding strip group spacing slide rail, and a second welding strip group spacing slide rail, wherein: The misaligned slide rail is mounted on the base; The first strip group spacing slide rail is slidably connected to the misaligned slide rail, and a plurality of first strip clamping assemblies and a plurality of first strip cutters are all connected to the first strip group spacing slide rail; The second strip group spacing slide rail is disposed on the base, and a plurality of second strip clamping assemblies and a plurality of second strip cutters are connected to the second strip group spacing slide rail; Before all the odd-numbered weld strips are cut, the first weld strip group slides along the offset slide rail so that all the odd-numbered weld strips are offset from all the even-numbered weld strips by a predetermined distance in the first horizontal direction. After all the odd-numbered solder strips are cut, several first solder strip clamping assemblies and several first solder strip cutters slide apart along the first solder strip group spacing slide rail to implement the spacing of each first solder strip group; After all even-numbered solder strips are cut, several second solder strip clamping assemblies and several second solder strip cutters slide apart along the second solder strip group spacing slide rails to implement the spacing of each second solder strip group.

8. The welding strip processing apparatus as described in claim 7, characterized in that: The welding strip processing device further includes a misalignment drive assembly, a first spacing drive assembly, and a second spacing drive assembly disposed on the base, wherein: the misalignment drive assembly is used to drive the first welding strip group spacing slide rail to slide along the misalignment slide rail; the first spacing drive assembly is used to drive a plurality of first welding strip clamping assemblies and first welding strip cutters to slide apart along the first welding strip group spacing slide rail; and the second spacing drive assembly is used to drive a plurality of second welding strip clamping assemblies and a plurality of second welding strip cutters to slide apart along the second welding strip group spacing slide rail.

9. The welding strip processing apparatus as described in claim 8, characterized in that: The first ribbon clamping assembly located at the rear end is fixed on the first ribbon group spacing slide rail, and the remaining first ribbon clamping assemblies and the first ribbon cutter are slidably connected to the first ribbon group spacing slide rail; the first ribbon cutter is connected to the two adjacent first ribbon clamping assemblies via first connecting rods, wherein at least one end of the first connecting rod is movably connected to the first ribbon cutter or the first ribbon clamping assembly, and the first connecting rod can drive the first ribbon cutter to slide in the first horizontal direction; The drive end of the first pitch driving component is connected to the first solder ribbon clamping component located at the foremost end. The first pitch driving component drives the first solder ribbon clamping component located at the foremost end to slide, thereby causing several first solder ribbon clamping components and several first solder ribbon cutters to slide apart. The second strip clamping assembly located at the rear end is fixed on the second strip group spacing slide rail, and the remaining second strip clamping assemblies and the second strip cutter are slidably connected to the second strip group spacing slide rail; the second strip cutter is connected to two adjacent second strip clamping assemblies via second connecting rods, wherein at least one end of the second connecting rod is movably connected to the second strip cutter or the second strip clamping assembly, and the second connecting rod can drive the second strip cutter to slide in the first horizontal direction; The drive end of the second pitch drive component is connected to the second ribbon clamping component located at the foremost end. The second pitch drive component drives the second ribbon clamping component located at the foremost end to slide, thereby causing several second ribbon clamping components and several second ribbon cutters to slide apart.

10. The welding strip processing apparatus as described in claim 9, characterized in that: At least one end of the first connecting rod is provided with a first connecting waist hole extending along the first horizontal direction, and the corresponding first welding strip clamping assembly or the first welding strip cutter is provided with a first connecting pin, which is inserted into the first connecting waist hole and can slide within the first connecting waist hole. The second connecting rod has at least one end provided with a second connecting waist hole extending along the first horizontal direction, and the corresponding second welding strip clamping assembly or the second welding strip cutter is provided with a second connecting pin, which is inserted into the second connecting waist hole and can slide within the second connecting waist hole.

11. The welding strip processing apparatus as described in claim 1, characterized in that: The first solder ribbon clamping assembly, located at the foremost position, is positioned in front of the second solder ribbon clamping assembly, which is also located at the foremost position. The first solder ribbon clamping assembly at the foremost position is configured to move vertically upwards and downwards; or... The second ribbon clamping assembly located at the foremost position is positioned in front of the first ribbon clamping assembly located at the foremost position, and the second ribbon clamping assembly located at the foremost position is configured to be able to move up and down in the vertical direction.

12. A string welding machine for welding solar cells into strings, wherein the back of the solar cells is provided with staggered first and second electrode rows, characterized in that, The string welding machine includes a welding conveying mechanism, a cell laying mechanism, a welding strip traction mechanism, a welding strip processing device as described in any one of claims 1 to 11, a welding strip transport mechanism, and a welding mechanism, wherein: The welding conveying mechanism is used to carry at least the battery cells and the welding strip assembly; The cell laying mechanism is used to lay several cells with a first predetermined spacing on the welding conveying mechanism with their backs facing up, and the polarities of the electrode rows of adjacent cells on the same straight line are opposite. The welding strip traction mechanism is used to pull multiple welding strips extending along a first horizontal direction onto the welding strip processing device; The solder strip processing device is used to stagger all the odd-numbered solder strips and all the even-numbered solder strips by a predetermined distance in the first horizontal direction, and to alternately cut all the odd-numbered solder strips and all the even-numbered solder strips to obtain a plurality of first solder strip groups and a plurality of second solder strip groups. The solder strip processing device is also used to adjust the spacing between each first solder strip group and the spacing between each second solder strip group to a second predetermined spacing. The ribbon conveying mechanism is used to stack a plurality of first ribbon groups and a plurality of second ribbon groups on the ribbon processing device onto a plurality of laid-up battery cells, such that each first ribbon group is stacked on the odd-numbered electrode row of the corresponding battery cell, and each second ribbon group is stacked on the even-numbered electrode row of the corresponding battery cell. The welding mechanism is used to weld stacked strips and battery cells into strings.

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