Battery string repair platform and repair equipment

Abstract

The application provides a battery string repair platform and a repair device, wherein the repair platform comprises a mounting seat, an intermediate welding table, a first side welding table and a second side welding table, wherein: the intermediate welding table is fixedly installed on the mounting seat, and the intermediate welding table is used for carrying a defective battery piece; the intermediate welding table is provided with a through hole corresponding to a pad point of the defective battery piece; the first side welding table is installed on the mounting seat, and the first side welding table is used for carrying a battery piece located on a first side of the defective battery piece; the first side welding table can be translated towards or away from the intermediate welding table and can be raised and lowered in the vertical direction; the second side welding table is installed on the mounting seat, and the second side welding table is used for carrying a battery piece located on a second side of the defective battery piece; the second side welding table can be translated towards or away from the intermediate welding table and can be raised and lowered in the vertical direction. The repair platform can be matched to realize repair of battery strings with different defect types, avoid damage to non-defective battery pieces and improve the battery string repair efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery production, specifically to a battery string repair platform and repair equipment. Background Technology

[0002] A battery string is made up of several battery cells welded together with solder strips. During the welding or transfer process, defective battery cells may appear within the string, such as cold solder joints or microcracks. This is especially true for SMBB (Super Multi-Busbar) battery strings, where the grid spacing on the battery cells is usually less than 10mm, and the grid lines are extremely fine. Therefore, the solder strips must also be very fine during welding, making welding difficult. The probability of cold solder joints on the front and back of the battery string is the highest among all defects, reaching as high as 38%, thus requiring rework of the battery string.

[0003] Traditional repair methods primarily involve manually placing the battery string onto a repair platform. For defective battery cells that can be repaired by patching cold solder joints, if the cold solder joint is located on the top surface (front or back) of the battery string, the string is placed directly on the repair platform, and the cold solder joints are patched manually using soldering irons or similar devices. If the cold solder joint is located on the bottom surface of the battery string, the string needs to be rotated 180° before being placed on the repair platform with the cold solder joint facing upwards, and then the cold solder joints are patched manually.

[0004] For defective cells with severe cold solder joints, microcracks, or other defects that require replacement, the cell string is first placed on the rework platform. The adjacent cells on both sides of the defective cell are then manually lifted, and the solder strips on both sides of the defective cell are cut off one by one. A new cell is then placed in the position of the original defective cell, and the solder strips are welded using a soldering iron or other welding equipment.

[0005] Therefore, it is evident that during the rework process, the rework platform is only used to support the battery string. Its structure is simple and its function is singular. During rework, manual operation is required to flip or lift adjacent battery cells of the defective battery string according to the type of defect present. However, improper operation during the flipping process can easily damage other good battery cells in the string; similarly, improper operation during the manual lifting of adjacent battery cells can easily damage them. Summary of the Invention

[0006] To address the problems of traditional battery string repair platforms, this invention provides a battery string repair platform, the specific technical solution of which is as follows:

[0007] A battery string repair platform includes a mounting base, an intermediate soldering station, a first side soldering station, and a second side soldering station, wherein:

[0008] The intermediate welding station is fixedly installed on the mounting base. The intermediate welding station is used to support the defective battery cells in the battery string to be repaired. The intermediate welding station has through holes corresponding to the welding pads of the defective battery cells.

[0009] The first side welding station is movably mounted on the mounting base. The first side welding station is used to carry the battery cell located on the first side of the defective battery cell in the battery string to be repaired. The first side welding station is configured to be able to move toward or away from the intermediate welding station to achieve docking and separation with the intermediate welding station, and is configured to be able to move up and down in the vertical direction to achieve alignment and misalignment with the intermediate welding station.

[0010] The second side welding station is movably mounted on the mounting base. The second side welding station is used to carry the battery cell located on the second side of the defective battery cell in the battery string to be repaired. The second side welding station is configured to be able to move toward or away from the intermediate welding station to achieve docking and separation with the intermediate welding station, and is configured to be able to move up and down in the vertical direction to achieve alignment and misalignment with the intermediate welding station.

[0011] The battery string repair platform of this invention allows battery strings to be placed on the platform with either surface facing upwards during repair, with defective cells placed on the intermediate soldering station. When encountering different defects during battery string repair, if the upper surface of the battery string has a weld defect that can be repaired, it can be repaired directly from the top side; if the lower surface has a weld defect that can be repaired, it can be repaired through a through-hole on the intermediate soldering station from the bottom side, without needing to flip the battery string, thus avoiding damage to other good cells in the battery string caused by flipping. If the defect requires cell replacement, the adjacent cells on both sides of the defective cell can be automatically lifted by driving the first and second soldering stations to expose the solder strip to be cut, avoiding damage to adjacent cells caused by manual lifting. Therefore, the battery string repair platform of this invention is a comprehensive repair platform capable of repairing battery strings with different defect types, avoiding damage to non-defective cells, and improving battery string repair efficiency.

[0012] In some embodiments, a welding clearance channel is provided through the mounting base at the position corresponding to the intermediate welding station. The welding mechanism passes through the welding clearance channel and the through hole in sequence to repair the solder pads on the lower surface of the defective battery cell that need to be repaired.

[0013] By setting a welding clearance channel at the position of the mounting base corresponding to the intermediate welding station, it is more convenient for the welding mechanism to repair the solder pads on the lower surface of the defective battery cell from the lower side of the intermediate welding station, and the thermal impact on the mounting base is reduced.

[0014] In some embodiments, the battery string repair platform further includes a first driving device and a second driving device disposed on the mounting base, wherein the first driving device is used to drive the first side welding station to translate and lift, and the second driving device is used to drive the second side welding station to translate and lift.

[0015] By setting up a first driving device and a second driving device, the translation and lifting of the first side welding station and the second side welding station are realized.

[0016] In some embodiments, the first driving device includes a first translational driving mechanism and a first lifting driving mechanism. The first translational driving mechanism is connected to a mounting base, and the first lifting driving mechanism is connected to a movable part of the first translational driving mechanism. A first side soldering station is connected to the movable part of the first lifting driving mechanism. The first translational driving mechanism drives the first side soldering station to translate, and the first lifting driving mechanism drives the first side soldering station to rise or fall. The second driving device includes a second translational driving mechanism and a second lifting driving mechanism. The second translational driving mechanism is connected to a mounting base, and the second lifting driving mechanism is connected to a movable part of the second translational driving mechanism. A second side soldering station is connected to the movable part of the second lifting driving mechanism. The second translational driving mechanism drives the second side soldering station to translate, and the second lifting driving mechanism drives the second side soldering station to rise or fall.

[0017] Through the cooperation of the first translation drive mechanism and the first lifting drive mechanism, the first drive device realizes the translation and lifting drive of the first side welding station. Through the cooperation of the second translation drive mechanism and the second lifting drive mechanism, the second drive device realizes the translation and lifting drive of the second side welding station.

[0018] In some embodiments, the first translation drive mechanism includes a first sliding mounting plate and a first translation drive motor, wherein the first sliding mounting plate is slidably connected to the mounting base via a horizontal slide rail and connected to the drive end of the first translation drive motor; the first lifting drive mechanism includes a first lifting bracket, a first support plate, and a first lifting drive motor, wherein the first lifting bracket and the first lifting drive motor are both disposed on the first sliding mounting plate, the first support plate is slidably connected to the first lifting bracket via a first vertical slide rail and connected to the drive end of the first lifting drive motor, and a first side welding station is disposed on the first support plate; the first translation drive motor drives the first sliding mounting plate to slide, thereby causing the first side welding station to translate toward or away from the middle welding station, and the first lifting drive motor is used to drive the first support plate to lift, thereby causing the first side welding station to lift.

[0019] By configuring the first translation drive mechanism and the first lifting drive mechanism, the translation and lifting drive of the first side welding station are realized.

[0020] In some embodiments, the second translation drive mechanism includes a second sliding mounting plate and a second translation drive motor, wherein the second sliding mounting plate is slidably connected to the mounting base via a horizontal slide rail and connected to the drive end of the second translation drive motor; the second lifting drive mechanism includes a second lifting bracket, a second support plate, and a second lifting drive motor, wherein the second lifting bracket and the second lifting drive motor are both disposed on the second sliding mounting plate, the second support plate is slidably connected to the second lifting bracket via a second vertical slide rail and connected to the drive end of the second lifting drive motor, and the second side welding station is disposed on the second support plate; the second translation drive motor drives the second sliding mounting plate to slide, thereby causing the second side welding station to translate toward or away from the middle welding station, and the second lifting drive motor is used to drive the second support plate to lift, thereby causing the second side welding station to lift.

[0021] By configuring the second translation drive mechanism and the second lifting drive mechanism, the translation and lifting drive of the second side welding station are realized.

[0022] In some embodiments, an adsorption structure for adsorbing defective solar cells is provided on the intermediate welding station; a first side adsorption plate is provided at the end of the first side welding station near the intermediate welding station, the first side adsorption plate being used to support and adsorb adjacent solar cells located on the first side of the defective solar cell; a second side adsorption plate is provided at the end of the second side welding station near the intermediate welding station, the second side adsorption plate being used to support and adsorb adjacent solar cells located on the second side of the defective solar cell.

[0023] The intermediate welding station, the first adsorption plate on the first side welding station, and the second adsorption plate on the second side welding station respectively adsorb the defective battery cell and the adjacent battery cells located on the first and second sides of the defective battery cell. This avoids unnecessary movement of the defective battery cell and the adjacent battery cell when the first side welding station and the second side welding station rise or fall, thereby ensuring the accuracy of the subsequent welding position.

[0024] In some embodiments, a heating mechanism and a temperature sensor are provided on the intermediate welding station, the first side adsorption plate, and the second side adsorption plate.

[0025] Heating mechanisms and temperature sensors are respectively installed below the intermediate welding station, the first side adsorption plate, and the second side adsorption plate. This allows for temperature monitoring of the intermediate welding station, the first side adsorption plate, and the second side adsorption plate, and enables heating of these components based on temperature conditions. This facilitates the evaporation of flux during the welding process, improving the welding effect. The temperature sensors also prevent the heating mechanism from heating too high or too low.

[0026] In some embodiments, the battery string repair platform further includes a first straightening mechanism disposed on both sides of a first side welding station and a second straightening mechanism disposed on both sides of a second side welding station, wherein the first straightening mechanism is used to straighten the battery string carried on the first side welding station, and the second straightening mechanism is used to straighten the battery string carried on the second side welding station.

[0027] By setting up aligning mechanisms on both sides of the first and second welding stations, the battery strings to be repaired on the welding station can be aligned before the welding station picks up the battery strings, thereby achieving the positioning of the battery strings to be repaired and ensuring welding position accuracy.

[0028] In some embodiments, the first alignment mechanism includes a first alignment bar and a second alignment bar, wherein the first alignment bar is disposed on a first side of the first side welding station, and the second alignment bar is disposed on a second side of the first side welding station, and the first and second alignment bars are configured to be able to translate toward or away from the first side welding station; the second alignment mechanism includes a third alignment bar and a fourth alignment bar, wherein the third alignment bar is disposed on a first side of the second side welding station, and the fourth alignment bar is disposed on a second side of the second side welding station, and the third and fourth alignment bars are configured to be able to translate toward or away from the second side welding station.

[0029] A simple sizing mechanism is provided, which sizes the battery string on the soldering station by controlling the movement of sizing bars on both sides of the soldering station toward or away from the soldering station.

[0030] In some embodiments, the first alignment mechanism further includes a first alignment drive cylinder and a second alignment drive cylinder disposed on the first side welding platform. The first alignment drive cylinder is used to drive the first alignment strip to translate toward or away from the first side welding platform, and the second alignment drive cylinder is used to drive the second alignment strip to translate toward or away from the first side welding platform. The second alignment mechanism further includes a third alignment drive cylinder and a fourth alignment drive cylinder disposed on the second side welding platform. The third alignment drive cylinder is used to drive the third alignment strip to translate toward or away from the second side welding platform, and the fourth alignment drive cylinder is used to drive the fourth alignment strip to translate toward or away from the second side welding platform.

[0031] In the first alignment mechanism, the first and second alignment bars are independently driven by the first and second alignment drive cylinders, respectively. This allows the first alignment mechanism to simultaneously align the battery strings on the first side welding platform from both sides, or to align them from only one side, thus improving alignment flexibility. Similarly, in the second alignment mechanism, the third and fourth alignment bars are independently driven by the third and fourth alignment drive cylinders, respectively. This allows the second alignment mechanism to simultaneously align the battery strings on the second side welding platform from both sides, or to align them from only one side.

[0032] In some embodiments, the first aligning mechanism further includes a first double-ended lead screw drive motor disposed on the first side welding platform, the first double-ended lead screw drive motor being used to drive the first aligning strip and the second aligning strip to move synchronously toward or away from the first side welding platform; the second aligning mechanism further includes a second double-ended lead screw drive motor disposed on the second side welding platform, the second double-ended lead screw drive motor being used to drive the third aligning strip and the fourth aligning strip to move synchronously toward or away from the second side welding platform.

[0033] In the first alignment mechanism, a single double-ended lead screw drive motor can drive the first and second alignment strips to move synchronously toward or away from the first side welding station, thereby simultaneously aligning the battery strings located on the first side welding station from both sides. Similarly, in the second alignment mechanism, a single double-ended lead screw drive motor can drive the third and fourth alignment strips to move synchronously toward or away from the second side welding station, thereby simultaneously aligning the battery strings located on the second side welding station from both sides.

[0034] The present invention also provides a battery string repair device, which includes a battery string repair platform as described in any of the above claims, a first laser welding mechanism, and a second laser welding mechanism, wherein: the first laser welding mechanism is disposed above the battery string repair platform, and is used to perform repair welding on the upper surface of the battery string to be repaired for repairing the upper surface cold weld from the upper side of the intermediate welding station, and to perform replacement welding on the battery string to be repaired for replacement of the wafer; the second laser welding mechanism is disposed below the battery string repair platform, and is used to perform repair welding on the lower surface of the battery string to be repaired for repairing the lower surface cold weld from the lower side of the intermediate welding station.

[0035] The battery string repair equipment provided by this invention has laser welding mechanisms on both the upper and lower sides of the battery string repair platform. The first laser welding mechanism can repair surface defects and perform cell replacement welding on the battery string to be repaired, while the second laser welding mechanism can repair surface defects on the battery string to be repaired. This eliminates the need to flip the battery string, resulting in high repair efficiency. Compared to traditional electromagnetic welding and infrared lamp box welding mechanisms, laser welding has a smaller heating area and controllable temperature rise. When repairing defects, it can directly target the weld pads. When replacing cells, it can directly weld the overlapping joints of the weld strips. The weld pads and other areas of the battery cell are not affected by heat, avoiding secondary welding, over-welding, or weld pad detachment. It also prevents the battery cell from deforming due to excessive heat. Especially when repairing surface defects, the laser can easily pass through the through-hole of the intermediate welding station to irradiate the weld pads, thereby reducing the thermal impact on the intermediate welding station and welding fixtures and improving welding quality.

[0036] In some embodiments, the battery string repair equipment further includes a ribbon cutting mechanism, a ribbon clamping mechanism, and a cell picking and placing mechanism, wherein: the ribbon cutting mechanism is used to cut the ribbon between the defective cell to be replaced and the adjacent cell in the battery string to be repaired; the cell picking and placing mechanism is used to remove the cut defective cell and to load the replacement cell to the position vacated after the defective cell is removed, and the front and back of the replacement cell have been welded with ribbons; the ribbon clamping mechanism clamps the ribbons on the replacement cell and the ribbons on the adjacent cell together one by one; and the first laser welding mechanism is used to weld the clamped pairs of ribbons together.

[0037] By coordinating the battery string repair platform, the welding ribbon cutting mechanism, the welding ribbon clamping mechanism, the battery cell picking and placing mechanism, and the first welding mechanism, this invention achieves full automation of the cell replacement operation, significantly improving cell replacement efficiency.

[0038] In some embodiments, the battery string repair equipment further includes a first flux application mechanism and a second flux application mechanism, wherein: the first flux application mechanism is used to apply flux to the upper surface cold solder joint position before the solder strip clamping mechanism clamps the solder strip, or to apply flux to the solder strip overlap position between the replacement battery cell and the adjacent battery cell; the second flux application mechanism is used to apply flux to the lower surface cold solder joint position before the solder strip clamping mechanism clamps the solder strip.

[0039] Automatic flux application is achieved by setting up a first flux application mechanism and a second flux application mechanism. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the battery string repair platform provided in an embodiment of the present invention from a first-view perspective.

[0041] Figure 2 This is a schematic diagram of the battery string repair platform provided in an embodiment of the present invention from a second perspective.

[0042] Figure 3 for Figure 2 A partial structural diagram of the second side welding station;

[0043] Figure 4 This is a schematic diagram of the battery string repair platform provided in an embodiment of the present invention from a third perspective.

[0044] Figure 5 for Figure 4 A magnified view of region A in the image;

[0045] Figure 6 This is a schematic diagram of the battery string repair platform provided in an embodiment of the present invention from a fourth perspective.

[0046] Figure 7 This is a partial structural diagram of the location of the intermediate welding station, the first side adsorption plate, and the second side adsorption plate of the battery string repair platform in an embodiment of the present invention.

[0047] Figure 8 for Figure 7 A schematic diagram of the structure after removing the intermediate welding station, the first side adsorption plate, and the second side adsorption plate;

[0048] Figure 9 A schematic diagram of the battery string repair equipment provided in an embodiment of the present invention from one perspective;

[0049] Figure 10 This is a schematic diagram of the battery string repair equipment provided in an embodiment of the present invention from a second perspective.

[0050] Figures 1 to 10 Includes:

[0051] Mounting base 10;

[0052] Intermediate welding station 20, through hole 21, adsorption hole 22;

[0053] First side welding station 30, first side adsorption plate 31;

[0054] Second side welding station 40, second side adsorption plate 41;

[0055] First translation drive mechanism 50, first sliding mounting plate 51, first translation drive motor 52;

[0056] Second translation drive mechanism 60, second sliding mounting plate 61, second translation drive motor 62;

[0057] The first lifting drive mechanism 70, the first lifting bracket 71, the first lifting drive motor 72, the first support plate 73, the cam bearing follower 74, the rocker arm 75, the cam guide plate 76, the first vertical slide rail 77, and the guide groove 761.

[0058] The second lifting drive mechanism 80, the second lifting bracket 81, the second lifting drive motor 82, the second support plate 83, and the second vertical slide rail 84.

[0059] First alignment mechanism 90, first alignment bar 91, second alignment bar 92, first alignment drive cylinder 93, second alignment drive cylinder 94;

[0060] Second alignment mechanism 100, third alignment bar 101, fourth alignment bar 102, third alignment drive cylinder 103, fourth alignment drive cylinder 104, paddle 1021;

[0061] Heating mechanism 110, temperature sensor 120;

[0062] Battery string repair platform 1, first laser welding mechanism 2, second laser welding mechanism 3, welding strip cutting mechanism 4, welding strip clamping mechanism 5, battery cell picking and placing mechanism 6, first flux application mechanism 7, second flux application mechanism 8. Detailed Implementation

[0063] 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.

[0064] Existing repair platforms only serve to support battery strings during the repair process. Their structure is simple and their function is limited. During repair, manual operation is required to flip or lift adjacent battery cells based on the type of defect in the battery string. Improper operation during the flipping process can easily damage other good battery cells in the string; similarly, improper operation during the manual lifting of adjacent battery cells can easily damage them.

[0065] In view of this, the present invention provides a battery string repair platform, such as... Figures 1 to 4 and Figure 6 and Figure 7 As shown, the battery string repair platform includes a mounting base 10, an intermediate soldering station 20, a first side soldering station 30, and a second side soldering station 40, wherein:

[0066] The intermediate welding station 20 is fixedly installed on the mounting base 10. The intermediate welding station 20 is used to support the defective battery cells in the battery string to be repaired. The intermediate welding station 20 has through holes 21 corresponding to the welding pads of the defective battery cells.

[0067] The first side welding station 30 is movably mounted on the mounting base 10. The first side welding station 30 is used to carry the battery cell located on the first side of the defective battery cell in the battery string to be repaired. The first side welding station 30 is configured to be able to move toward or away from the intermediate welding station 20 to achieve docking and separation with the intermediate welding station 20, and is configured to be able to move up and down in the vertical direction to achieve alignment and misalignment with the intermediate welding station 20.

[0068] The second side welding station 40 is movably mounted on the mounting base 10. The second side welding station 40 is used to carry the battery cell located on the second side of the defective battery cell in the battery string to be repaired. The second side welding station 40 is configured to be able to translate toward or away from the intermediate welding station 20 to achieve docking and separation with the intermediate welding station 20, and is configured to be able to rise and fall in the vertical direction to achieve alignment and misalignment with the intermediate welding station 20.

[0069] In the initial state, the intermediate welding station 20, the first side welding station 30 and the second side welding station 40 are connected in the horizontal direction and aligned in the vertical direction, that is, the surfaces of the intermediate welding station 20, the first side welding station 30 and the second side welding station 40 are connected to form a continuous horizontal welding surface.

[0070] For battery strings requiring repair of cold solder joints, the battery strings are placed on the horizontal welding platform, ensuring that the defective cell is located on the intermediate welding platform 20, and the adjacent cells on both sides of the defective cell are located on the first side welding platform 30 and the second side welding platform 40, respectively. Since the intermediate welding platform 20 has a through hole 21, the repair of cold solder joints on the upper and / or lower surfaces of the battery strings can be completed without flipping the battery strings. The upper surface repair is performed from the top of the battery strings, while the lower surface repair is performed from the bottom of the battery strings through the through hole 21 on the intermediate welding platform 20.

[0071] like Figure 7 and Figure 8 As shown, optionally, the mounting base 10 is provided with a welding avoidance channel 11 that passes through the mounting base 10 at the position corresponding to the intermediate welding station 20. The welding mechanism can pass through the welding avoidance channel 11 and the through hole 21 in sequence to repair the welding pads on the lower surface of the defective battery cell from the bottom side, which makes it easier to repair the lower surface of the battery string to be repaired from the bottom side.

[0072] For a battery string that needs to be replaced, first place the battery string to be replaced on the horizontal welding platform, and ensure that the defective battery cell is located on the middle welding platform 20, and the adjacent battery cells on both sides of the defective battery cell are located on the first side welding platform 30 and the second side welding platform 40 respectively.

[0073] Next, the first side welding station 30 and the second side welding station 40 are controlled to rise or fall. For example, the first side welding station 30 is controlled to rise and the second side welding station 40 is controlled to fall, so that the first side welding station 30 and the second side welding station 40 are vertically offset from the middle welding station 20. At this time, the solder strip between the defective cell and the adjacent cells on both sides is exposed, so that the solder strip cutting mechanism can smoothly cut the solder strip between the defective cell and the adjacent cells on both sides. After the solder strip is cut, the first side welding station and the second side welding station are controlled to move away. Then, the first side welding station and the second side welding station are controlled to fall or rise back to their original positions, so that the defective cell can be completely separated from the battery string, thereby completing the disassembly of the defective cell and improving the cell replacement efficiency.

[0074] Optionally, the battery string repair platform of the present invention further includes a first driving device and a second driving device disposed on the mounting base 10, wherein the first driving device is used to drive the first side welding station 30 to translate and lift, and the second driving device is used to drive the second side welding station 40 to translate and lift.

[0075] Optional, such as Figures 1 to 2 As shown, the first driving device includes a first translational driving mechanism 50 and a first lifting driving mechanism 70. The first translational driving mechanism 50 is connected to the mounting base 10, and the first lifting driving mechanism 70 is connected to the movable part of the first translational driving mechanism 50. The first side welding station 30 is connected to the movable part of the first lifting driving mechanism 70. The first translational driving mechanism 50 is used to drive the first side welding station 30 to translate, and the first lifting driving mechanism 70 is used to drive the first side welding station 30 to lift.

[0076] The second driving device includes a second translational driving mechanism 60 and a second lifting driving mechanism 80. The second translational driving mechanism 60 is connected to the mounting base 10, and the second lifting driving mechanism 80 is connected to the movable part of the second translational driving mechanism 60. The second side welding station 40 is connected to the movable part of the second lifting driving mechanism 80. The second translational driving mechanism 60 is used to drive the second side welding station 40 to translate, and the second lifting driving mechanism is used to drive the second side welding station 40 to lift.

[0077] like Figures 1 to 4 As shown, optionally, the first translation drive mechanism 50 includes a first sliding mounting plate 51 and a first translation drive motor 52, wherein the first sliding mounting plate 51 is slidably connected to the mounting base 10 via a horizontal slide rail and is connected to the drive end of the first translation drive motor 52.

[0078] The first lifting drive mechanism 70 includes a first lifting bracket 71, a first support plate 73, and a first lifting drive motor 72. The first lifting bracket 71 and the first lifting drive motor 72 are both mounted on the first sliding mounting plate 51. The first support plate 73 is slidably connected to the first lifting bracket 71 via a first vertical slide rail 77 and is connected to the drive end of the first lifting drive motor 72. The first side welding station 30 is mounted on the first support plate 73.

[0079] The first translation drive motor 52 drives the first sliding mounting plate 51 to slide, thereby causing the first side welding station 30 to translate toward or away from the middle welding station 20. The first lifting drive motor 72 is used to drive the first support plate 73 to lift, thereby causing the first side welding station 30 to lift.

[0080] Continue to refer to Figures 1 to 4 As shown, optionally, the second translation drive mechanism 60 includes a second sliding mounting plate 61 and a second translation drive motor 62, wherein the second sliding mounting plate 61 is slidably connected to the mounting base 10 via a horizontal slide rail and is connected to the drive end of the second translation drive motor 62.

[0081] The second lifting drive mechanism 80 includes a second lifting bracket 81, a second support plate 83, and a second lifting drive motor 82. The second lifting bracket 81 and the second lifting drive motor 82 are both mounted on the second sliding mounting plate 81. The second support plate 83 is slidably connected to the second lifting bracket 81 via a second vertical slide rail 84 and is connected to the drive end of the second lifting drive motor 82. The second side welding station 40 is mounted on the second support plate 83.

[0082] The second translation drive motor 82 drives the second sliding mounting plate 81 to slide, thereby causing the second side welding station 40 to translate toward or away from the middle welding station 20. The second lifting drive motor 82 is used to drive the second support plate 83 to lift, thereby causing the second side welding station 40 to lift.

[0083] Optionally, both the first translation drive motor 52 and the second translation drive motor 62 are lead screw motors, and the lead screw nuts of the first translation drive motor 52 and the second translation drive motor 62 are respectively connected to the first sliding mounting plate 51 and the second sliding mounting plate 61.

[0084] Optionally, the connection and driving methods of the first lifting drive motor 72 and the first pallet 73, and the second lifting drive motor 82 and the second pallet 83 are the same. Taking the connection and driving method of the first lifting drive motor 72 and the first pallet 73 as an example, such as... Figure 5 As shown, a cam guide plate 76 is connected to the first support plate 73, and a guide groove 761 is provided on the cam guide plate 76. A rocker arm 75 is connected to the power output end of the first lifting drive motor 72, and a cam bearing follower 74 is connected to the end of the rocker arm 75. The cam bearing follower 74 is located in the guide groove 761. When the first lifting drive motor 72 drives the rocker arm 75 to swing, the cam bearing follower 74 is driven by the rocker arm 75 to raise or lower the cam guide plate 76, ultimately realizing the lifting drive of the first support plate 73.

[0085] Optional, such as Figures 6 to 7 As shown, the intermediate welding station 20 is equipped with an adsorption structure for adsorbing defective solar cells, such as an adsorption hole 22 or a suction cup. A first-side adsorption plate 31 is provided at the end of the first-side welding station 30 near the intermediate welding station 20. The first-side adsorption plate 31 is used to support and adsorb adjacent solar cells located on the first side of the defective solar cell. A second-side adsorption plate 41 is provided at the end of the second-side welding station 40 near the intermediate welding station 20. The second-side adsorption plate 41 is used to support and adsorb adjacent solar cells located on the second side of the defective solar cell. The adsorption structures on the first-side adsorption plate 31 and the second-side adsorption plate 41 can also be adsorption holes or suction cups. Optionally, adsorption holes or suction cups can also be provided at other positions on the first-side welding station 30 and the second-side welding station 40.

[0086] After the battery string to be repaired is placed on the repair platform and its position is adjusted, the intermediate welding station 20, the first side adsorption plate 31, and the second side adsorption plate 32 respectively adsorb the defective battery cell and the adjacent battery cells located on the first and second sides of the defective battery cell. This ensures that the first side welding station 30 and the second side welding station 40 rise or fall, thereby automatically lifting the adjacent battery cells on both sides of the defective battery cell to expose the solder strip to be cut and avoid damage to the adjacent battery cells caused by manual lifting.

[0087] like Figure 7 and Figure 8 As shown, optionally, a heating mechanism 110 and a temperature sensor 120 are provided below the intermediate welding station 20, the first side adsorption plate 31, and the second side adsorption plate 32. The heating mechanism 110 and the temperature sensor 120 can monitor the temperature of the intermediate welding station 20, the first side adsorption plate 31, and the second side adsorption plate 32, and heat the intermediate welding station 20, the first side adsorption plate 31, and the second side adsorption plate 32 according to the temperature, thereby facilitating the volatilization of flux on the battery cell during the welding process and improving the welding effect. The setting of the temperature sensor 120 can prevent the heating temperature of the heating mechanism 110 from being too high or too low.

[0088] like Figure 1 and Figure 6 As shown, optionally, the battery string repair platform of the present invention further includes a first straightening mechanism 90 disposed on both sides of the first side welding station 30 and a second straightening mechanism 100 disposed on both sides of the second side welding station 40, wherein the first straightening mechanism 90 is used to straighten the battery string carried on the first side welding station 30, and the second straightening mechanism 100 is used to straighten the battery string carried on the second side welding station 40.

[0089] By setting up a straightening mechanism on both sides of the first side welding station 30 and the second side welding station 40, the battery strings to be repaired on the welding station can be straightened before the welding station adsorbs the battery strings, thereby ensuring the repair effect.

[0090] Optionally, the first alignment mechanism 90 includes a first alignment strip 91 and a second alignment strip 92, wherein the first alignment strip 91 is disposed on a first side of the first side welding station 30, and the second alignment strip 92 is disposed on a second side of the first side welding station 30. The first alignment strip 91 and the second alignment strip 92 are configured to be able to translate toward or away from the first side welding station, thereby performing alignment of the battery string carried on the first side welding station 30. The second alignment mechanism 100 includes a third alignment strip 101 and a fourth alignment strip 102, wherein the third alignment strip 101 is disposed on a first side of the second side welding station 40, and the fourth alignment strip 102 is disposed on a second side of the second side welding station 40. The third alignment strip 101 and the fourth alignment strip 102 are configured to be able to translate toward or away from the second side welding station 40, thereby performing alignment of the battery string carried on the second side welding station 40.

[0091] Optionally, to eliminate the alignment gaps, at least one side of the two alignment bars included in the first alignment mechanism 90 and the second alignment mechanism 100 is provided with a plurality of levers 1021 arranged along the extension direction of the alignment bars. The levers 1021 are preferably made of spring steel, and the gaps are eliminated during the alignment process through the elastic deformation of the levers. For example, as... Figure 7 As shown, paddles 1021 are selected to be installed on the second regularization strip 92 and the fourth regularization strip 102.

[0092] like Figure 2 and Figure 4 As shown, optionally, in some embodiments, the first alignment mechanism 90 further includes a first alignment drive cylinder 93 and a second alignment drive cylinder 94 disposed on the first side welding station 30. The first alignment drive cylinder 93 drives the first alignment bar 91 to translate toward or away from the first side welding station, thereby achieving alignment of the battery string supported on the first side welding station 30 from the first side. The second alignment drive cylinder 94 drives the second alignment bar 92 to translate toward or away from the first side welding station 30, thereby achieving alignment of the battery string supported on the first side welding station 30 from the second side.

[0093] As can be seen, by using the first alignment drive cylinder 93 and the second alignment drive cylinder 94 to drive the first alignment bar 91 and the second alignment bar 92 to move respectively, the first alignment mechanism 90 can simultaneously align the battery string located on the first side welding station 30 from both sides, or it can align the battery string located on the first side welding station 30 from only one side, thereby improving the alignment flexibility.

[0094] Similarly, such as Figures 2 to 4As shown, the second alignment mechanism 100 also includes a third alignment drive cylinder 103 and a fourth alignment drive cylinder 104 disposed on the second side welding station 40. The third alignment drive cylinder 103 is used to drive the third alignment bar 101 to translate toward or away from the second side welding station 40, thereby realizing the alignment of the battery string supported on the second side welding station 40 from the first side. The fourth alignment drive cylinder 104 is used to drive the fourth alignment bar 102 to translate toward or away from the second side welding station 40, thereby realizing the alignment of the battery string supported on the second side welding station 40 from the second side.

[0095] Optionally, in other embodiments, the first straightening mechanism 90 further includes a first double-ended lead screw drive motor disposed on the first side welding station 30. The lead screw nuts at both ends of the first double-ended lead screw drive motor are respectively connected to the first straightening strip 91 and the second straightening strip 92, thereby driving the first straightening strip 91 and the second straightening strip 92 to translate synchronously toward or away from the first side welding station 30. Similarly, the second straightening mechanism 100 further includes a second double-ended lead screw drive motor disposed on the second side welding station 40. The lead screw nuts at both ends of the second double-ended lead screw drive motor are respectively connected to the third straightening strip 101 and the fourth straightening strip 102, and the second double-ended lead screw drive motor is used to drive the third straightening strip 101 and the fourth straightening strip 102 to translate synchronously toward or away from the second side welding station 40.

[0096] As can be seen, in these embodiments, the first straightening mechanism 90 and the second straightening mechanism 100 achieve synchronous driving of the corresponding two straightening strips by only one double-headed lead screw drive motor, thereby realizing the straightening of the battery string from both sides at the same time.

[0097] like Figure 9 and Figure 10 As shown, the present invention also provides a battery string repair device, which includes a battery string repair platform 1, a first laser welding mechanism 2 and a second laser welding mechanism 3, wherein the battery string repair platform 1 can be the battery string repair platform provided in any of the above embodiments.

[0098] The first laser welding mechanism 2 is set above the battery string repair platform 1. The first laser welding mechanism 2 is used to perform repair welding on the upper surface of the battery string to be repaired from the upper side of the intermediate welding station 20, and to perform replacement welding on the battery string to be repaired, that is, after disassembling and removing the defective battery cell that needs to be replaced, the qualified replacement battery cell is welded to the original position of the defective battery cell.

[0099] The second laser welding mechanism 3 is located below the battery string repair platform 1. The second laser welding mechanism is used to repair the poor weld position on the lower surface of the battery string to be repaired from the lower side of the intermediate welding station 20.

[0100] The battery string repair equipment provided by this invention has welding mechanisms on both the upper and lower sides of its battery string repair platform. Therefore, during repair, the battery string to be repaired can be placed on the battery string repair platform with either surface facing upwards, and the defective battery cell can be placed on the intermediate welding platform.

[0101] When encountering different defects during battery string repair, if the upper surface of the battery string has a faulty weld that can be repaired, it can be repaired directly from the top side of the battery string. If the lower surface of the battery string has a faulty weld that can be repaired, it can be repaired from the bottom side of the battery string through the through hole 21 on the intermediate welding station, without flipping the battery string, thus avoiding damage to other good cells in the battery string caused by flipping. If the defect requires cell replacement, the adjacent cells on both sides of the defective cell can be automatically lifted by driving the first and second welding stations to expose the weld strip to be cut by driving them up or down, avoiding damage to the adjacent cells caused by manually lifting them. Therefore, the battery string repair platform of the present invention is a comprehensive repair platform that can be used to repair battery strings with different defect types, avoid damage to non-defective cells, and improve the efficiency of battery string repair.

[0102] Optional, such as Figure 2 As shown, the battery string repair equipment of the present invention also includes a solder strip cutting mechanism 4, a solder strip clamping mechanism 5, and a battery cell picking and placing mechanism 6, wherein:

[0103] The ribbon cutting mechanism 4 is used to cut the ribbon between the lifted defective cell and the adjacent cell. Of course, before the ribbon clamping mechanism 5 performs the ribbon cutting action, the battery string rework platform 1 has already automatically lifted the adjacent cell of the defective cell in the battery string to be reworked by controlling the lifting and lowering of the first side welding station 30 and the second side welding station 40.

[0104] The cell pick-and-place mechanism 6 is used to remove the cut-off defective cells and to load replacement cells into the empty space left by the removal of the defective cells. The front and back of the replacement cells have been welded with solder strips.

[0105] The welding strip clamping mechanism 5 clamps and overlaps the welding strips on the replacement solar cell with those on adjacent solar cells, one by one. Finally, the first laser welding mechanism 2 welds the pairs of welding strips clamped by the welding strip clamping mechanism 5.

[0106] Continue to refer to Figure 2As shown, optionally, the battery string repair equipment in this embodiment further includes a first flux application mechanism 7 and a second flux application mechanism 8, wherein: the first flux application mechanism 7 is used to apply flux to the poor solder joint position on the upper surface before the solder ribbon clamping mechanism 5 clamps the solder ribbon, or to apply flux to the overlap position of the solder ribbon between the replacement battery cell and the adjacent battery cell. The second flux application mechanism 8 is used to apply flux to the poor solder joint position on the lower surface before the solder ribbon clamping mechanism 5 clamps the solder ribbon.

[0107] 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 repair platform, characterized in that, The battery string repair platform includes a mounting base, an intermediate soldering station, a first side soldering station, and a second side soldering station, wherein: The intermediate welding station is fixedly installed on the mounting base. The intermediate welding station is used to support the defective battery cells in the battery string to be repaired. The intermediate welding station has through holes corresponding to the welding pads of the defective battery cells. The first side welding station is movably mounted on the mounting base. The first side welding station is used to carry the battery cell located on the first side of the defective battery cell in the battery string to be repaired. The first side welding station is configured to be able to translate toward or away from the intermediate welding station to achieve docking and separation with the intermediate welding station, and is configured to be able to rise and fall in the vertical direction to achieve alignment and misalignment with the intermediate welding station. The second side welding station is movably mounted on the mounting base. The second side welding station is used to carry the battery cell located on the second side of the defective battery cell in the battery string to be repaired. The second side welding station is configured to be able to translate toward or away from the intermediate welding station to achieve docking and separation with the intermediate welding station, and is configured to be able to rise and fall in the vertical direction to achieve alignment and misalignment with the intermediate welding station. The mounting base has a welding clearance channel that passes through the mounting base at the position corresponding to the intermediate welding station. The welding mechanism passes through the welding clearance channel and the through hole in sequence to repair the solder pads on the lower surface of the defective battery cell that need to be repaired.

2. The battery string repair platform as described in claim 1, characterized in that, The battery string repair platform also includes a first driving device and a second driving device disposed on the mounting base, wherein the first driving device is used to drive the first side welding station to translate and lift, and the second driving device is used to drive the second side welding station to translate and lift.

3. The battery string repair platform as described in claim 2, characterized in that: The first driving device includes a first translation driving mechanism and a first lifting driving mechanism. The first translation driving mechanism is connected to the mounting base, and the first lifting driving mechanism is connected to the movable part of the first translation driving mechanism. The first side welding station is connected to the movable part of the first lifting driving mechanism. The first translation driving mechanism is used to drive the first side welding station to translate, and the first lifting driving mechanism drives the first side welding station to lift. The second driving device includes a second translational driving mechanism and a second lifting driving mechanism. The second translational driving mechanism is connected to the mounting base, and the second lifting driving mechanism is connected to the movable part of the second translational driving mechanism. The second side welding station is connected to the movable part of the second lifting driving mechanism. The second translational driving mechanism is used to drive the second side welding station to translate, and the second lifting driving mechanism drives the second side welding station to lift.

4. The battery string repair platform as described in claim 3, characterized in that: The first translation drive mechanism includes a first sliding mounting plate and a first translation drive motor, wherein the first sliding mounting plate is slidably connected to the mounting base via a horizontal slide rail and is connected to the drive end of the first translation drive motor; The first lifting drive mechanism includes a first lifting bracket, a first support plate, and a first lifting drive motor. The first lifting bracket and the first lifting drive motor are both mounted on the first sliding mounting plate. The first support plate is slidably connected to the first lifting bracket via a first vertical slide rail and is connected to the drive end of the first lifting drive motor. The first side welding station is mounted on the first support plate. The first translation drive motor drives the first sliding mounting plate to slide, thereby causing the first side welding station to translate toward or away from the middle welding station. The first lifting drive motor is used to drive the first pallet to lift, thereby causing the first side welding station to lift.

5. The battery string repair platform as described in claim 3, characterized in that: The second translation drive mechanism includes a second sliding mounting plate and a second translation drive motor, wherein the second sliding mounting plate is slidably connected to the mounting base via a horizontal slide rail and is connected to the drive end of the second translation drive motor; The second lifting drive mechanism includes a second lifting bracket, a second support plate, and a second lifting drive motor. The second lifting bracket and the second lifting drive motor are both mounted on the second sliding mounting plate. The second support plate is slidably connected to the second lifting bracket via a second vertical slide rail and is connected to the drive end of the second lifting drive motor. The second side welding station is mounted on the second support plate. The second translation drive motor drives the second sliding mounting plate to slide, thereby causing the second side welding station to translate toward or away from the middle welding station. The second lifting drive motor is used to drive the second support plate to lift, thereby causing the second side welding station to lift.

6. The battery string repair platform as described in claim 1, characterized in that: The intermediate welding platform is provided with an adsorption structure for adsorbing the defective battery cells; The first side welding station is provided with a first side adsorption plate at the end near the middle welding station. The first side adsorption plate is used to support and adsorb adjacent battery cells located on the first side of the defective battery cell. The second side welding station is provided with a second side adsorption plate at the end near the middle welding station. The second side adsorption plate is used to support and adsorb adjacent battery cells located on the second side of the defective battery cell.

7. The battery string repair platform as described in claim 6, characterized in that: Heating mechanisms and temperature sensors are provided on the intermediate welding station, the first side adsorption plate, and the second side adsorption plate.

8. The battery string repair platform as described in claim 1, characterized in that: The battery string repair platform further includes a first straightening mechanism disposed on both sides of the first side welding station and a second straightening mechanism disposed on both sides of the second side welding station. The first straightening mechanism is used to straighten the battery string supported on the first side welding station, and the second straightening mechanism is used to straighten the battery string supported on the second side welding station.

9. The battery string repair platform as described in claim 8, characterized in that: The first alignment mechanism includes a first alignment bar and a second alignment bar, wherein the first alignment bar is disposed on a first side of the first side welding station, and the second alignment bar is disposed on a second side of the first side welding station. The first alignment bar and the second alignment bar are configured to be able to translate toward or away from the first side welding station. The second alignment mechanism includes a third alignment bar and a fourth alignment bar, wherein the third alignment bar is disposed on the first side of the second side welding station, and the fourth alignment bar is disposed on the second side of the second side welding station. The third alignment bar and the fourth alignment bar are configured to be able to translate toward or away from the second side welding station.

10. The battery string repair platform as described in claim 9, characterized in that: The first alignment mechanism further includes a first alignment drive cylinder and a second alignment drive cylinder disposed on the first side welding platform. The first alignment drive cylinder is used to drive the first alignment strip to move toward or away from the first side welding platform, and the second alignment drive cylinder is used to drive the second alignment strip to move toward or away from the first side welding platform. The second alignment mechanism further includes a third alignment drive cylinder and a fourth alignment drive cylinder disposed on the second side welding platform. The third alignment drive cylinder is used to drive the third alignment strip to translate toward or away from the second side welding platform, and the fourth alignment drive cylinder is used to drive the fourth alignment strip to translate toward or away from the second side welding platform.

11. The battery string repair platform as described in claim 9, characterized in that: The first straightening mechanism further includes a first double-ended lead screw drive motor disposed on the first side welding platform. The first double-ended lead screw drive motor is used to drive the first straightening strip and the second straightening strip to move synchronously toward or away from the first side welding platform. The second straightening mechanism also includes a second double-ended lead screw drive motor disposed on the second side welding platform. The second double-ended lead screw drive motor is used to drive the third straightening strip and the fourth straightening strip to move synchronously toward or away from the second side welding platform.

12. A battery string repair device, characterized in that, The battery string repair equipment includes a battery string repair platform as described in any one of claims 1 to 11, a first laser welding mechanism, and a second laser welding mechanism, wherein: The first laser welding mechanism is located above the battery string repair platform. The first laser welding mechanism is used to repair the poor weld position on the upper surface of the battery string to be repaired from the upper side of the intermediate welding station, and to perform replacement welding on the battery string to be repaired. The second laser welding mechanism is located below the battery string repair platform. The second laser welding mechanism is used to repair the poor weld position on the lower surface of the battery string to be repaired from the lower side of the intermediate welding station.

13. The battery string repair equipment as described in claim 12, characterized in that, The battery string repair equipment also includes a solder strip cutting mechanism, a solder strip clamping mechanism, and a battery cell picking and placing mechanism, wherein: The welding strip cutting mechanism is used to cut the welding strip between the defective cell to be replaced and the adjacent cell in the battery string to be repaired. The battery cell picking and placing mechanism is used to remove the cut-off defective battery cell and to load a replacement battery cell into the empty position after the defective battery cell is removed. The front and back of the replacement battery cell have been welded with solder strips. The welding strip clamping mechanism clamps the welding strips on the replacement battery cell and the welding strips on the adjacent battery cell together in a one-to-one correspondence. The first laser welding mechanism is used to weld the clamped pairs of weld strips together.

14. The battery string repair equipment as described in claim 13, characterized in that: The battery string repair equipment further includes a first flux application mechanism and a second flux application mechanism, wherein: The first flux application mechanism is used to apply flux to the poor soldering position on the upper surface before the solder strip clamping mechanism clamps the solder strip, or to apply flux to the overlap position of the solder strip between the replacement battery cell and the adjacent battery cell. The second flux application mechanism is used to apply flux to the poor solder joints on the lower surface before the solder strip is held by the solder strip clamping mechanism.

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