A battery string production apparatus and production method

Abstract

The application provides a battery string production device and a production method. The battery string production device comprises a welding strip arranging device, a conveying device, a welding strip guiding device and a carrying device. The welding strip guiding device is arranged above the conveying device. The carrying device lays battery pieces on a battery piece placing position. The conveying device steps a predetermined distance to the rear each time to convey the battery pieces. The welding strip arranging device arranges first welding strip groups and second welding strip groups on a welding strip placing station. The first half of the first welding strip group is arranged on the i-th battery piece, and the second half of the first welding strip group is arranged on the i+1-th battery piece. The first half of the second welding strip group is arranged on the i+1-th battery piece, and the second half of the second welding strip group is arranged on the welding strip guiding device. The conveying device steps a predetermined distance to the rear, and the second half of the second welding strip group falls on the i+2-th battery piece. The application realizes automatic stringing of IBC battery pieces. The application reduces the equipment cost and improves the production efficiency of IBC battery strings.

Description

Technical Field

[0001] This invention relates to the field of battery production, specifically to a battery string production equipment and method. 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 100 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 101, and the second electrodes are arranged in rows to form at least two rows of second electrode rows 102. The first electrode rows 101 and the second electrode rows 102 are arranged alternately.

[0004] like Figure 2 As shown, the back-mounted solar cells are connected in series as follows: N solar cells 100 (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 solder ribbon groups (five in the figure) are used to connect the N solar cells 100 in series, 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] The existing method for stringing IBC solar cells involves using a specialized solder ribbon processing device to separate the solder ribbons, thereby obtaining a staggered first and second solder ribbon group. Next, a solder ribbon transport device picks up the pre-arranged first and second solder ribbon groups from the solder ribbon processing device and stacks them onto the pre-arranged solar cells.

[0006] It is evident that existing solder strip processing methods require specialized solder strip processing equipment to implement the spacing and arrangement of solder strips, which not only increases equipment costs but also reduces battery string production efficiency. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention provides a battery string production device, which employs the following technical solution:

[0008] A battery string production device is used to string together battery cells with staggered first and second electrode rows on their back sides to form a battery string. The battery string production device includes a welding strip application device, a conveying device, a welding strip guiding device, and a handling device, wherein:

[0009] The welding strip guide device is located above the conveying device. A gap is maintained between the welding strip guide device and the conveying device to allow the battery cells to pass through. The area on the conveying device located on the feeding side of the welding strip guide device is the battery cell placement position.

[0010] The conveying device is configured to lay the solar cells to the cell placement location;

[0011] The conveying device is configured to advance a predetermined distance to the rear track each time to convey the solar cells. The predetermined distance is the sum of the width of two laid solar cells and the spacing between the two solar cells.

[0012] The ribbon placement device is configured to place the first ribbon group and the second ribbon group separately along the conveying direction of the conveyor at the ribbon placement station, wherein: the first half of the first ribbon group is placed on the i-th battery cell, and the second half of the first ribbon group is placed on the (i+1)-th battery cell; the first half of the second ribbon group is placed on the (i+1)-th battery cell, and the second half of the second ribbon group is placed on the ribbon guide device, and the battery cell below the ribbon guide device is the (i+2)-th battery cell;

[0013] The conveying device is configured to advance a predetermined distance to the rear track, with the latter half of the second welding strip group onto the (i+2)th solar cell.

[0014] By setting a welding strip guiding device on the conveying device, the battery string production equipment provided by the present invention eliminates the need for a welding strip processing device to pre-segment the welding strip. The conveying device and the handling device can work together with the welding strip laying device to simultaneously place the first welding strip group and the second welding strip group onto two adjacent battery cells, thereby completing the automatic stringing of IBC battery cells. The present invention reduces equipment costs and improves the production efficiency of IBC battery strings.

[0015] In some embodiments, the conveying device is further configured to simultaneously press two clamping fixtures onto the i-th and i+1-th battery cells, respectively, when placing the i+3-th and i+4-th battery cells into the battery cell placement position.

[0016] The conveying device simultaneously transports the clamping fixture and the solar cells to the corresponding workstations, improving the efficiency of solar cell stringing. The clamping fixture presses the welding strip firmly onto the corresponding solar cell, improving welding quality and preventing incomplete welds.

[0017] In some embodiments, the handling device includes a moving mechanism, a mounting bracket, a cell pickup unit, and a tooling pickup unit, wherein: the mounting bracket is connected to the drive end of the moving mechanism, and the cell pickup unit and the tooling pickup unit are arranged side by side and spaced apart on the mounting bracket; the cell pickup unit is configured to pick up two cells simultaneously, and the tooling pickup unit is configured to pick up two clamping fixtures simultaneously, wherein the distance between the cell picked up by the cell pickup unit and the fixture picked up by the tooling pickup unit is greater than the width of one cell.

[0018] By configuring the handling device, it is possible to simultaneously transport two battery cells and two clamping fixtures to their respective workstations.

[0019] In some embodiments, the ribbon guiding device is provided with ribbon guiding grooves, and the number of ribbon guiding grooves is at least equal to the sum of the number of ribbons in the first ribbon group and the number of ribbons in the second ribbon group.

[0020] By setting a solder strip guide groove on the solder strip guide device, the solder strips in the solder strip group are guided, ensuring that the solder strips can be aligned and stacked on the grid line of the corresponding battery cell.

[0021] In some embodiments, the welding strip laying device includes at least one welding strip traction mechanism; the welding strip traction mechanism is configured to clamp a plurality of welding strips extending along the conveying direction of the conveying device, and to perform a separation of all odd-numbered welding strips and all even-numbered welding strips in the clamped plurality of welding strips to obtain a first welding strip group and a second welding strip group staggered along the conveying direction of the conveying device; the welding strip traction mechanism is further configured to place the first welding strip group and the second welding strip group to the welding strip placement station.

[0022] By configuring the welding strip laying device to include at least one welding strip traction mechanism, the welding strip laying device is able to traction multiple welding strips and, during the traction process, to perform the separation of all odd-numbered welding strips and all even-numbered welding strips among the multiple welding strips, to obtain a first welding strip group and a second welding strip group.

[0023] In some embodiments, the welding strip traction mechanism includes a first clamping plate and a second clamping plate arranged side by side, wherein: the first clamping plate is provided with a plurality of first clamping claws, and the second clamping plate is provided with a plurality of second clamping claws arranged alternately with the first clamping claws, each first clamping claw and each second clamping claw being capable of clamping one welding strip; the first clamping plate and the second clamping plate are configured to be able to move closer together and separate along the conveying direction of the conveying device; when the first clamping plate and the second clamping plate move closer together along the conveying direction of the conveying device, the first clamping plate clamps all the odd-numbered welding strips among the plurality of welding strips, and the second clamping plate clamps all the even-numbered welding strips among the plurality of welding strips; when the first clamping plate and the second clamping plate separate to both sides, all the odd-numbered welding strips among the plurality of welding strips are staggered from all the even-numbered welding strips.

[0024] With the cooperation of the first clamping plate and the second clamping plate, after the welding strip traction mechanism clamps multiple welding strips, it can perform the separation of all the odd-numbered welding strips and all the even-numbered welding strips, thereby obtaining the first welding strip group and the second welding strip group that are staggered in the conveying direction of the conveying device.

[0025] In some embodiments, the battery string production equipment further includes a welding strip processing mechanism, which includes a welding strip clamping assembly, a color-changing assembly, and a cutting assembly arranged sequentially along the conveying direction of the conveying device. The welding strip traction mechanism is further configured to pull multiple clamped welding strips toward the conveying device, so that the welding strips pass sequentially through the welding strip clamping assembly, the color-changing assembly, and the cutting assembly. When the distance between the welding strip traction mechanism and the cutting assembly reaches a predetermined value, the welding strip clamping assembly is configured to clamp the welding strip, the color-changing assembly is configured to perform color-changing processing on the welding strip, and the cutting assembly is configured to cut the welding strip to obtain multiple welding strips with predetermined lengths.

[0026] By setting up a ribbon processing mechanism, multiple ribbons drawn from the ribbon supply point are automatically cut to obtain multiple ribbons of predetermined length. Finally, the ribbon traction mechanism separates these ribbons to obtain a first ribbon group and a second ribbon group. Furthermore, by incorporating a color-changing component between the ribbon clamping assembly and the cutting assembly, the middle sections of the final first and second ribbon groups are color-changed. This effectively improves the color consistency of the entire battery string after the cells and ribbon groups are welded together.

[0027] In some embodiments, the welding strip processing mechanism further includes a support guide disposed between the welding strip clamping assembly and the cutting assembly, the support guide being used to support the welding strip and guide the welding strip.

[0028] By setting up a support guide, the traction of the welding strip is supported and guided.

[0029] In some embodiments, the battery string production equipment further includes a welding strip lifting device disposed in front of the conveying device. The welding strip lifting device is configured to lift the first welding strip group and the second welding strip group pulled by the welding strip laying device, and is configured to move synchronously with the welding strip laying device to lift and transfer the first welding strip group or the second welding strip group to the conveying device.

[0030] By setting up a welding strip lifting device, the first or second welding strip group being pulled by the welding strip distribution device is lifted and supported, ensuring that the welding strip can be smoothly pulled to the conveying device.

[0031] In some embodiments, the battery string production equipment further includes a movable guide plate, which is movably disposed between the welding strip guiding device and the welding strip lifting device, and the movable guide plate is provided with a welding strip limiting groove.

[0032] The movable guide plate is used to transfer the first and second welding strip groups from the welding strip lifting device to the welding strip guide groove of the welding strip guiding device via the welding strip limiting groove.

[0033] By setting up a movable guide plate, the transfer and guidance of the first or second welding strip group between the welding strip lifting device and the welding strip guiding device are realized, ensuring that each welding strip in the first or second welding strip group can accurately enter the corresponding welding strip guiding groove on the welding strip guiding device.

[0034] In some embodiments, the battery string production equipment further includes a stringing device, which is disposed after the welding strip guide device and is used to string the welding strip and battery cells conveyed by the conveying device into a battery string.

[0035] By setting up a series connection device, the solder strip and the battery cell were connected in series.

[0036] In some embodiments, when the first strip group is placed, the end of the rear half of the first strip group is placed on the strip guide device.

[0037] The welding strip guiding device simultaneously guides and positions the first welding strip group, improving the laying effect of the first welding strip group.

[0038] In some embodiments, the welding strip guide device is provided with a notch at the discharge end corresponding to the second welding strip group.

[0039] By setting a notch at the discharge end of the welding strip guide device, the welding strip is prevented from being bent due to being too close to the welding strip guide device when the clamping fixture presses the welding strip.

[0040] The present invention also provides a method for producing battery strings, comprising:

[0041] Control the conveying device to lay the battery cells at the battery cell placement location;

[0042] The control conveying device advances a predetermined distance to the rear track each time to convey the solar cells. The predetermined distance is the sum of the width of two laid solar cells and the spacing between the two solar cells.

[0043] The control strip placement device simultaneously places the first and second strip groups at the strip placement station, staggered along the conveying direction of the conveyor. Specifically, the first half of the first strip group is placed on the i-th battery cell, and the second half is placed on the (i+1)-th battery cell. The first half of the second strip group is placed on the (i+1)-th battery cell, and the second half is placed on the strip guide device. The battery cell below the strip guide device is the (i+2)-th battery cell.

[0044] The control conveyor moves a predetermined distance backward, and the second half of the second welding strip group is placed onto the (i+2)th battery cell.

[0045] The battery string production method provided by this invention eliminates the need for pre-spacing of the solder strips using a solder strip processing device. It enables the simultaneous placement of the first and second solder strip groups onto two adjacent battery cells, thereby completing the automatic stringing of IBC battery cells. This invention reduces equipment costs and improves the production efficiency of IBC battery strings. Attached Figure Description

[0046] Figure 1 This is a structural diagram of a back-mounted solar cell.

[0047] Figure 2 This is a schematic diagram of the structure of four back-connected solar cells connected in series by a solder strip.

[0048] Figure 3 This is a top view of the battery production equipment provided in an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of the welding strip traction mechanism in an embodiment of the present invention;

[0050] Figures 5 to 12 This is a schematic diagram illustrating the laying process of the battery cells, welding ribbons, and tooling in an embodiment of the present invention.

[0051] Figures 1 to 12 Includes:

[0052] Welding strip device 1:

[0053] First traction mechanism 11, second traction mechanism 12: first clamping plate 111, second clamping plate 112;

[0054] Conveying device 2;

[0055] Welding strip guide device 3;

[0056] Welding strip processing mechanism 4: welding strip clamping assembly 41, color changing assembly 42, cutting assembly 43, support guide 44;

[0057] 5. Welding strip lifting device;

[0058] Moving guide plate 6;

[0059] Back-mounted battery cell 100, first electrode row 101, second electrode row 102. Detailed Implementation

[0060] 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.

[0061] The following two embodiments will be used to illustrate the battery production equipment and battery string production method provided by the present invention.

[0062] In existing IBC cell stringing methods, a specialized solder strip processing device is required to process the solder strip, which not only increases equipment costs but also reduces the production efficiency of the cell string.

[0063] Therefore, this invention proposes a battery string production device for connecting IBC solar cells into battery strings. For example... Figure 3 As shown, the battery string production equipment in this embodiment of the invention includes a welding strip feeding device 1, a conveying device 2, a welding strip guiding device 3, and a handling device, wherein:

[0064] The welding strip guide device 3 is located above the conveying device 1. A gap is maintained between the welding strip guide device 3 and the conveying device 2 to allow the battery cells to pass through. The area on the conveying device 2 located on the feeding side of the welding strip guide device 3 is the battery cell placement position A, and the area on the conveying device 2 located on the discharging side of the welding strip guide device 3 is the battery cell placement position B.

[0065] The conveying device is configured to lay the solar cells at the solar cell placement location A.

[0066] The conveying device 2 is configured to advance a predetermined distance to the rear track each time to convey the solar cells. The predetermined distance is the sum of the width of the two solar cells laid out and the spacing between the two solar cells.

[0067] The welding strip placement device 1 is configured to simultaneously place the welding strip at station B along the conveying direction of the conveyor device. Figure 3 The first and second solder ribbon groups are staggered and placed separately (as indicated by the arrows in the diagram). Specifically: the first half of the first solder ribbon group is placed on the i-th solar cell, and the second half is placed on the (i+1)-th solar cell. The first half of the second solder ribbon group is placed on the (i+1)-th solar cell, and the second half is placed on the solder ribbon guide device 3. The solar cell below the solder ribbon guide device 3 is the (i+2)-th solar cell.

[0068] The conveyor 2 is configured to advance a predetermined distance to the rear track, so that the latter half of the second welding strip group is placed onto the (i+2)th battery cell.

[0069] In other words, after the conveying device 2 conveys two battery cells to the welding strip placement station A, the welding strip placement device 1 places a first welding strip group and a second welding strip group at the welding strip placement station B.

[0070] After the welding ribbon placement device 1 places the welding ribbon group, the conveying device 2 immediately transports the battery cells at welding ribbon placement station B to the next stage. Simultaneously, two battery cells from the next stage are transported to welding ribbon placement station B. During this process, the latter half of the second welding ribbon group falls from the welding ribbon guide device 3 onto one of the battery cells in the next stage.

[0071] As can be seen, by setting the welding strip guide device 3 on the conveying device, the battery string production equipment provided by the present invention does not require the welding strip processing device to pre-segment the welding strip. The conveying device 2 and the handling device can work together with the welding strip laying device 1 to simultaneously place the first welding strip group and the second welding strip group onto two adjacent battery cells, thereby completing the automatic stringing of IBC battery cells. The present invention reduces equipment costs and improves the production efficiency of IBC battery strings.

[0072] It should be noted that when the first welding strip group is placed, the rear half of its end can also be placed on the welding strip guide device 3. In this way, the welding strip guide device 3 can simultaneously guide and position the first welding strip group, thereby improving the laying effect of the first welding strip group.

[0073] Optionally, the conveying device is further configured to simultaneously press two clamping fixtures onto the i-th and i+1-th battery cells respectively when placing the (i+3)-th and (i+4)-th battery cells at cell placement position A. By simultaneously transporting the clamping fixtures and battery cells to their corresponding workstations, the efficiency of battery cell stringing is improved. The clamping fixtures can press the first and second solder strip groups onto the corresponding battery cells, thereby improving welding quality and preventing incomplete welds.

[0074] Optionally, the handling device includes a moving mechanism, a mounting bracket, a cell pickup unit, and a tooling pickup unit, wherein: the mounting bracket is connected to the drive end of the moving mechanism, and the cell pickup unit and the tooling pickup unit are arranged side-by-side and spaced apart on the mounting bracket. The cell pickup unit is configured to pick up two cells simultaneously, and the tooling pickup unit is configured to pick up two clamping fixtures simultaneously. The distance between the cells picked up by the cell pickup unit and the fixtures picked up by the tooling pickup unit is slightly greater than the width of one cell.

[0075] Optionally, the cell pickup unit can use a suction cup assembly, and the tooling pickup unit can use an adsorption structure such as a suction cup assembly or an electromagnetic assembly.

[0076] Optionally, the welding strip guide device 3 has a notch at the discharge end corresponding to the second welding strip group. By providing a notch at the discharge end of the welding strip guide device, it is possible to prevent the welding strip from being bent due to being too close to the welding strip guide device when the clamping fixture presses the welding strip.

[0077] Optionally, the ribbon guiding device 3 is provided with ribbon guiding grooves, the number of which is at least equal to the sum of the number of ribbons in the first ribbon group and the second ribbon group. This ensures that the latter half of each ribbon in the second ribbon group and the end of the latter half of each ribbon in the first ribbon group can be accommodated within a single ribbon guiding groove. This guarantees that each ribbon in both the first and second ribbon groups moves under the guidance of its corresponding ribbon guiding groove and ultimately falls onto its corresponding solar cell, preventing displacement.

[0078] For example, in some embodiments, both the first and second solder strip groups include M solder strips. The solder strip guiding device 3 is provided with 2M solder strip guiding grooves, wherein the M odd-numbered solder strip guiding grooves 31 of the 2M solder strip guiding grooves are used to place the end of the rear half of the first solder strip group, and the M even-numbered solder strip guiding grooves 31 of the 2M solder strip guiding grooves are used to place the rear half of the second solder strip group.

[0079] To enable those skilled in the art to more clearly understand the working process of the battery production equipment in the embodiments of the present invention, the following will be combined with Figures 5 to 12 The following is an exemplary description of the process for laying out the battery cells, solder ribbons, and tooling in the embodiments of the present invention:

[0080] like Figure 5 As shown, the first step is to control the conveying device to place the first and second battery cells at the battery cell loading station A.

[0081] like Figure 6 As shown, the control conveyor 2 advances in one step, causing the first and second solar cells to reach the ribbon placement station B, where the second solar cell is located below the ribbon guide device (not shown in the figure). Simultaneously, the solar cell loading station A is vacated.

[0082] like Figure 7 As shown, the ribbon laying device 1 lays the first first ribbon group (i.e., the head ribbon group) and the first second ribbon group, wherein: the front half of the first first ribbon group is placed on the conveying device 2, and the rear half of the first first ribbon group is placed on the first solar cell; the front half of the first second ribbon group is placed on the first solar cell, and the rear half of the first second ribbon group is placed on the ribbon guiding device.

[0083] like Figure 8 As shown, the control and handling device lays the third and fourth battery cells at the battery cell loading station A, and at the same time presses the first and second clamping fixtures onto the front half of the first welding strip group and the first battery cell, respectively.

[0084] like Figure 9 As shown, the control conveyor 2 advances one step, causing the third and fourth solar cells to reach the ribbon placement station B, where the fourth solar cell is located below the ribbon guide device (not shown in the figure). At the same time, the latter half of the first second ribbon group is placed onto the second solar cell, and the solar cell loading station A is vacated again.

[0085] like Figure 10As shown, the ribbon laying device 1 lays the second first ribbon group and the second second ribbon group, wherein: the first half of the second first ribbon group is placed on the second solar cell, and the second half of the second first ribbon group is placed on the third solar cell; the first half of the second second ribbon group is placed on the third solar cell, and the second half of the second second ribbon group is placed on the ribbon guiding device (not shown in the figure).

[0086] like Figure 11 As shown, the control and handling device lays the 5th and 6th battery cells at the battery cell loading station A, and at the same time presses the 3rd and 4th clamping fixtures onto the 2nd and 3rd battery cells respectively.

[0087] like Figure 12 As shown, the control conveyor 2 advances one step, causing the 5th and 6th solar cells to reach the ribbon placement station B, where the 6th solar cell reaches below the ribbon guide device (not shown in the figure). Simultaneously, the second half of the second ribbon group moves onto the 4th solar cell, and the solar cell loading station A is vacated again.

[0088] Next, the ribbon laying device 1 lays the third first ribbon group and the third second ribbon group, wherein: the first half of the third first ribbon group is placed on the fourth solar cell, and the second half of the third first ribbon group is placed on the fifth solar cell; the first half of the third second ribbon group is placed on the fifth solar cell, and the second half of the third second ribbon group is placed on the ribbon guiding device (not shown in the figure).

[0089] This process is repeated until all the battery cells, the first solder strip group, and the second solder strip group are placed.

[0090] Optionally, the welding strip placement device 1 includes at least one welding strip traction mechanism. The welding strip traction mechanism is configured to grip multiple welding strips extending along the conveying direction of the conveying device 2, and to perform a separation between all odd-numbered welding strips and all even-numbered welding strips among the gripped multiple welding strips, to obtain a first and second welding strip group staggered along the conveying direction of the conveying device 2. The welding strip traction mechanism is further configured to place the first and second welding strip groups at the welding strip placement station.

[0091] To improve the efficiency of welding strip application Figure 3 The welding strip laying device 1 in this embodiment includes two welding strip traction mechanisms, namely a first welding strip traction mechanism 11 and a second welding strip traction mechanism 12. The first welding strip traction mechanism 11 and the second welding strip traction mechanism 12 alternately perform the welding strip group laying operation.

[0092] The first strip traction mechanism 11 and the second strip traction mechanism 12 have the same structure, such as Figure 4As shown, taking the first welding strip traction mechanism 11 as an example, it includes a first clamping plate 111 and a second clamping plate 112 arranged side by side. The first clamping plate 111 is provided with a plurality of first grippers, and the second clamping plate 112 is provided with a plurality of second grippers arranged alternately with the first grippers. Each first gripper and each second gripper can clamp a welding strip. The first clamping plate 111 and the second clamping plate 112 are configured to move along the conveying direction of the conveying device 2 (e.g., ...). Figure 4 (The arrows in the text indicate the direction of convergence and separation.)

[0093] When the first clamping plate 111 and the second clamping plate 112 move closer together along the conveying direction of the conveying device 2, the first clamping plate 111 clamps multiple welding strips (such as... Figure 4 All odd-numbered solder strips in the 11th group (e.g.) Figure 4 The first, third, fifth, seventh, ninth, and eleventh welding strips in the middle), the second clamping plate 112 clamps the even-numbered welding strips among the multiple welding strips (such as...). Figure 4 (The 2nd, 4th, 6th, 8th, and 10th solder strips).

[0094] When the first clamping plate 111 and the second clamping plate 112 separate to both sides, all the odd-numbered solder strips among the multiple solder strips are staggered from all the even-numbered solder strips, thereby obtaining Figure 4 The diagram shows a first group of solder strips comprising 6 solder strips and a second group of solder strips comprising 5 solder strips. (See diagram for reference.) Figure 4 As shown, the staggered distance between the first and second solder strip groups is L, which is approximately the width of a single battery cell.

[0095] Continue to refer to Figure 3 As shown, optionally, the battery string production equipment in this embodiment of the invention further includes a welding strip processing mechanism 4. The welding strip processing mechanism 4 includes a welding strip clamping assembly 41, a color-changing assembly 42, and a cutting assembly 43 arranged sequentially along the conveying direction of the conveying device 2. The welding strip traction mechanism is further configured to pull multiple clamped welding strips toward the conveying device 2, so that the welding strips pass sequentially through the welding strip clamping assembly 41, the color-changing assembly 42, and the cutting assembly 43. When the distance between the welding strip traction mechanism and the cutting assembly 43 reaches a predetermined value, the welding strip clamping assembly 41 is configured to clamp the welding strip, the color-changing assembly 4 is configured to perform color-changing processing on the welding strip, and the cutting assembly 43 is configured to cut the welding strip to obtain multiple welding strips with predetermined lengths.

[0096] As can be seen, by setting up the welding strip processing mechanism 4, the automatic cutting of multiple welding strips pulled from the welding strip supply point is achieved, thereby obtaining multiple welding strips of predetermined length. Finally, the welding strip pulling mechanism separates these multiple welding strips of predetermined length, forming a first welding strip group and a second welding strip group. Furthermore, by setting a color-changing component 42 between the welding strip clamping component 41 and the cutting component 43, the middle portion of the final first and second welding strip groups has a color different from the original color of the welding strip. Thus, after the battery cells are welded into strings by the welding strip groups, the color consistency of the entire battery string can be effectively improved.

[0097] The color-changing component 42 can be an inkjet component, an adhesive dispensing component, or an adhesive tape application component, etc. For example, the inkjet component can spray black ink onto the solder ribbon, the adhesive dispensing component can apply black adhesive to the solder ribbon, and the adhesive tape application component can apply black adhesive tape to the solder ribbon.

[0098] Optionally, the welding strip processing mechanism 4 may further include a support guide 44 disposed between the welding strip clamping assembly 41 and the cutting assembly 43, the support guide 44 being used to support the welding strip and guide the welding strip.

[0099] Continue to refer to Figure 3 As shown, optionally, the battery string production equipment in this embodiment of the invention further includes a welding strip lifting device 5 disposed in front of the conveying device 2. The welding strip lifting device 5 is configured to lift the first welding strip group and the second welding strip group pulled by the welding strip laying device 1, and is configured to move synchronously with the welding strip laying device 1 to lift and transfer the first welding strip group or the second welding strip group to the conveying device 2.

[0100] By setting up the welding strip lifting device 5, the first or second welding strip group being pulled by the welding strip distribution device 1 is lifted and supported, ensuring that the welding strip group can be smoothly pulled to the conveying device 2.

[0101] Continue to refer to Figure 3 As shown, optionally, the battery string production equipment in this embodiment of the invention further includes a movable guide plate 6, which is movably disposed between the welding strip guiding device 3 and the welding strip lifting device 5. The movable guide plate 6 is provided with a welding strip limiting groove. The movable guide plate 6 is used to transfer the first welding strip group and the second welding strip group conveyed by the welding strip lifting device 5 to the welding strip guiding groove of the welding strip guiding device 1 via the welding strip limiting groove.

[0102] Optionally, the battery string production equipment in this embodiment of the invention further includes a stringing device, which is located after the welding strip guide device 3 and is used to string the welding strip and battery cells conveyed by the conveying device 2 into a battery string.

[0103] The series connection device can use infrared heating, hot air, laser welding, or light curing to connect the battery cells into a series.

[0104] The present invention also provides a method for producing battery strings, which can be implemented by the battery production equipment provided in any of the above embodiments, and includes at least the following steps:

[0105] Control the conveying device to lay the battery cells at the battery cell placement location.

[0106] The control conveying device advances a predetermined distance to the rear track each time to convey the solar cells. The predetermined distance is the sum of the width of two laid solar cells and the spacing between the two solar cells.

[0107] The control strip placement device simultaneously places the first and second strip groups at the strip placement station, staggered along the conveying direction of the conveyor. Specifically, the first half of the first strip group is placed on the i-th battery cell, and the second half is placed on the (i+1)-th battery cell. The first half of the second strip group is placed on the (i+1)-th battery cell, and the second half is placed on the strip guide device. The battery cell below the strip guide device is the (i+2)-th battery cell.

[0108] The control conveyor moves a predetermined distance backward, and the second half of the second welding strip group is placed onto the (i+2)th battery cell.

[0109] 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 battery string production device, characterized in that, The battery string production equipment is used to string together battery cells with staggered first and second electrode rows on the back to form a battery string. The equipment includes a ribbon welding device, a conveying device, a ribbon guiding device, and a handling device, wherein: The welding strip guide device is located above the conveying device, and a gap is maintained between the welding strip guide device and the conveying device to allow the battery cells to pass through. The area on the conveying device located on the feeding side of the welding strip guide device is the battery cell placement position. The conveying device is configured to lay the battery cells at the battery cell placement location; The conveying device is configured to advance a predetermined distance to the rear track each time to convey the solar cell, the predetermined distance being the sum of the width of two laid solar cells and the spacing between the two solar cells; The welding strip placement device is configured to place the first welding strip group and the second welding strip group separately from each other along the conveying direction of the conveying device at the welding strip placement station, wherein: the first half of the first welding strip group is placed on the i-th battery cell, and the second half of the first welding strip group is placed on the (i+1)-th battery cell; the first half of the second welding strip group is placed on the (i+1)-th battery cell, and the second half of the second welding strip group is placed on the welding strip guide device, and the battery cell below the welding strip guide device is the (i+2)-th battery cell; The conveying device is configured to advance the predetermined distance backward, with the latter half of the second ribbon group onto the (i+2)th solar cell.

2. The battery string production equipment as described in claim 1, characterized in that, The transport device is also configured to simultaneously press two clamping fixtures onto the i-th and i+1-th battery cells respectively when placing the i+3-th and i+4-th battery cells into the battery cell placement position.

3. The battery string production equipment as described in claim 2, characterized in that, The conveying device includes a moving mechanism, a mounting bracket, a battery cell pickup unit, and a tooling pickup unit, wherein: The mounting bracket is connected to the drive end of the moving mechanism, and the battery cell pickup part and the tooling pickup part are arranged side by side at intervals on the mounting bracket; The cell pickup unit is configured to pick up two cells simultaneously, and the tooling pickup unit is configured to pick up two clamping fixtures simultaneously. The distance between the cell picked up by the cell pickup unit and the tooling picked up by the tooling pickup unit is greater than the width of one cell.

4. The battery string production equipment as described in claim 1, characterized in that, The welding strip guiding device is provided with welding strip guiding grooves, and the number of welding strip guiding grooves is at least equal to the sum of the number of welding strips in the first welding strip group and the number of welding strips in the second welding strip group.

5. The battery string production equipment as described in claim 1, characterized in that, The welding strip feeding device includes at least one welding strip traction mechanism; The welding strip traction mechanism is configured to clamp multiple welding strips extending along the conveying direction of the conveying device, and to perform a separation between all odd-numbered welding strips and all even-numbered welding strips in the clamped multiple welding strips, so as to obtain a first welding strip group and a second welding strip group that are staggered along the conveying direction of the conveying device. The welding strip traction mechanism is also configured to place the first welding strip group and the second welding strip group at the welding strip placement station.

6. The battery string production equipment as described in claim 5, characterized in that, The welding strip traction mechanism Includes a first clamping plate and a second clamping plate arranged side by side, wherein: The first clamping plate is provided with a plurality of first clamping claws, and the second clamping plate is provided with a plurality of second clamping claws that are staggered with the first clamping claws. Each first clamping claw and each second clamping claw can clamp a welding strip. The first clamping plate and the second clamping plate are configured to be able to move closer together and separate along the conveying direction of the conveying device. When the first clamping plate and the second clamping plate move closer together along the conveying direction of the conveying device, the first clamping plate clamps all the odd-numbered welding strips of the plurality of welding strips, and the second clamping plate clamps all the even-numbered welding strips of the plurality of welding strips. When the first clamping plate and the second clamping plate separate to both sides, all the odd-numbered weld strips of the plurality of weld strips are staggered from all the even-numbered weld strips.

7. The battery string production equipment as described in claim 5, characterized in that, The battery string production equipment further includes a welding strip processing mechanism, which comprises a welding strip clamping assembly, a color-changing assembly, and a cutting assembly arranged sequentially along the conveying direction of the conveying device, wherein: The welding strip traction mechanism is also configured to pull multiple clamped welding strips toward the conveying device, so that the welding strips pass sequentially through the welding strip clamping assembly, the color changing assembly and the cutting assembly; When the distance between the welding strip traction mechanism and the cutting component reaches a predetermined value, the welding strip clamping component is configured to clamp the welding strip, the color-changing component is configured to change the color of the welding strip, and the cutting component is configured to cut the welding strip to obtain multiple welding strips with predetermined lengths.

8. The battery string production equipment as described in claim 7, characterized in that, The welding strip processing mechanism further includes a support guide portion disposed between the welding strip clamping assembly and the cutting assembly, the support guide portion being used to support the welding strip and guide the welding strip.

9. The battery string production equipment as described in claim 4, characterized in that, The battery string production equipment also includes a welding strip lifting device disposed in front of the conveying device. The welding strip lifting device is configured to lift the first welding strip group and the second welding strip group pulled by the welding strip laying device, and is configured to move synchronously with the welding strip laying device to lift and transfer the first welding strip group or the second welding strip group to the conveying device.

10. The battery string production equipment as described in claim 9, characterized in that, The battery string production equipment also includes a movable guide plate, which is movably disposed between the welding strip guiding device and the welding strip lifting device, and the movable guide plate is provided with a welding strip limiting groove; The movable guide plate is used to transfer the first and second welding strip groups, which are conveyed by the welding strip lifting device, through the welding strip limiting groove into the welding strip guiding groove of the welding strip guiding device.

11. The battery string production equipment according to claim 1, characterized in that, The battery string production equipment also includes a stringing device, which is located after the welding strip guide device. The stringing device is used to string the welding strip and battery cells conveyed by the conveying device into a battery string.

12. The battery string production equipment according to claim 1, characterized in that, When the first welding strip group is placed, the end of the rear half of the first welding strip group is placed on the welding strip guide device.

13. The battery string production equipment according to claim 1, characterized in that, The welding strip guiding device has a notch at the discharge end corresponding to the second welding strip group.

14. A method for producing battery strings, characterized in that, It is carried out by the battery string production equipment according to any one of claims 1 to 13, the battery string production method comprising: Control the conveying device to lay the battery cells at the battery cell placement location; The control conveying device advances a predetermined distance to the rear track each time to convey the battery cell, the predetermined distance being the sum of the width of two laid battery cells and the spacing between the two battery cells; The control device for placing the welding strips at the welding strip placement station simultaneously offsets the first welding strip group and the second welding strip group from each other along the conveying direction of the conveying device, wherein: the first half of the first welding strip group is placed on the i-th battery cell, and the second half of the first welding strip group is placed on the (i+1)-th battery cell; the first half of the second welding strip group is placed on the (i+1)-th battery cell, and the second half of the second welding strip group is placed on the welding strip guide device, and the battery cell below the welding strip guide device is the (i+2)-th battery cell; The conveying device is controlled to advance the predetermined distance to the next stage, so that the latter half of the second welding strip group is placed onto the (i+2)th battery cell.

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