A battery string repair device and a repair method

Abstract

The present invention provides a battery string repair device and a repair method. The battery string repair device includes a detection device, a string disassembling device, and a welding device, wherein: the detection device is used to detect and locate defective cells in the battery string to be repaired; the string disassembling device is used to disassemble the defective cells and the solder tapes welded to the defective cells from the battery string to be repaired, obtaining at least two disassembled battery strings; the welding device is used to weld replacement cells between the disassembled ends of adjacent disassembled battery strings, obtaining a repaired battery string. Through the cooperation of the detection device, the string disassembling device, and the welding device, the present invention realizes the automatic disassembly of defective cells in the battery string and the automatic welding of the disassembled battery strings and replacement cells, thereby greatly improving the repair efficiency of the battery string.

Description

Technical Field

[0001] The present invention relates to the field of battery production, and more particularly to a battery string repair device and a repair method. Background Art

[0002] A battery string is formed by welding a plurality of solar cells with solder tapes. Since the solar cells are thin and brittle, defective solar cells may appear in the battery string during welding or transfer. Therefore, the battery string needs to be retested and repaired to replace the defective solar cells.

[0003] Traditional methods for repairing battery strings generally involve manually disassembling the defective solar cells and the solder tapes thereon from the battery string, and then welding the replacement solar cells to the disassembled position. However, with the development of battery technology, existing battery strings are generally formed by welding multi-busbar solar cells, and the number of solder tapes welded on the solar cells is large. The workload of manually disassembling defective solar cells is large and the efficiency is low. Summary of the Invention

[0004] To solve the above technical problems, a first aspect of the present invention provides a battery string repair device, and its technical solution is as follows:

[0005] A battery string repair device, wherein the battery string is formed by welding at least two solar cells with solder tapes. The battery string repair device includes a detection device, a string disassembly device, and a welding device, wherein:

[0006] The detection device is used to detect and locate defective solar cells in the battery string to be repaired;

[0007] The string disassembly device is used to disassemble the defective solar cells and the solder tapes welded on the defective solar cells from the battery string to be repaired, obtaining at least two disassembled battery strings;

[0008] The welding device is used to weld the replacement solar cells between the disassembly ends of adjacent disassembled battery strings to obtain a repaired battery string.

[0009] Through the cooperation of the detection device, the string disassembly device, and the welding device, the present invention realizes the automatic disassembly of defective solar cells in the battery string, and realizes the automatic welding of the disassembled battery strings and the replacement solar cells, thus greatly improving the repair efficiency of the battery string.

[0010] In some embodiments, the detection device includes a conduction mechanism and an infrared imaging mechanism, wherein: the conduction mechanism is used to electrically conduct the battery string to be repaired; the infrared imaging mechanism is used to obtain an infrared image of the electrically conducted battery string to be repaired to detect and locate defective solar cells.

[0011] A detection device with a simple structure and convenient operation is provided, which detects and locates defective solar cells by obtaining an infrared image of the electrically conducted battery string to be repaired.

[0012] In some embodiments, the string disassembling device includes a carrying mechanism, a disassembling mechanism, a pressing mechanism and a driving mechanism, wherein: the carrying mechanism is used for carrying the battery string to be repaired; the carrying mechanism includes a slide rail and a plurality of carrying platforms, and the plurality of carrying platforms are slidably connected to the slide rail; the disassembling mechanism is located on the carrying platform, and the disassembling mechanism is used for heating a first cell and a second cell on both sides of the defective cell in the battery string to be repaired, so that the solder tape connecting the first cell and the defective cell is separated from the first cell, and the solder tape connecting the second cell and the defective cell is separated from the second cell; the pressing mechanism is used for pressing the defective cell; the driving mechanism includes a first driving part and a second driving part, the first driving part is used for driving each carrying platform on one side of the defective cell to slide away from the defective cell, and the second driving part is used for driving each carrying platform on the other side of the defective cell to slide away from the defective cell.

[0013] A string disassembling device is provided, which automatically disassembles the defective cell and the solder tape connected thereto from the battery string through the cooperation of the carrying mechanism, the disassembling mechanism, the pressing mechanism and the driving mechanism, so as to obtain a disassembled battery string.

[0014] In some embodiments, the welding device includes a battery string stacking mechanism, a cell stacking mechanism, a solder tape stacking mechanism, a welding conveying mechanism and a welding mechanism, wherein: the battery string stacking mechanism, the cell stacking mechanism and the solder tape stacking mechanism stack the disassembled battery string, the replacement cells and the solder tape onto the welding conveying mechanism; the welding conveying mechanism conveys the stacked disassembled battery string, replacement cells and solder tape to the welding mechanism; the welding mechanism is used for welding the stacked disassembled battery string, replacement cells and solder tape together to form a repaired battery string.

[0015] A welding device is provided, which automatically welds the replacement cells between the disassembled ends of the disassembled battery string through the cooperation of the battery string stacking mechanism, the cell stacking mechanism, the solder tape stacking mechanism, the welding conveying mechanism and the welding mechanism, so as to form a repaired battery string.

[0016] In some embodiments, the welding device further includes a tooling circulating conveying mechanism arranged on the side of the welding conveying mechanism; the tooling circulating conveying mechanism is used for circulatingly conveying the pressing tooling; the cell stacking mechanism is further used for picking up the pressing tooling from the circulating conveying tooling and carrying the picked tooling onto the stacked replacement cells to press the solder tape on the replacement cells onto the replacement cells.

[0017] Through the cooperation of the tooling circulating conveying mechanism and the cell stacking mechanism, the pressing tooling is circulated and carried onto the cells, thereby realizing the pressing of the solder tape.

[0018] In some embodiments, the solder tape stacking mechanism includes a solder tape unwinding mechanism, a solder tape traction mechanism, and a solder tape cutting mechanism, where: the solder tape unwinding mechanism is used to support the solder tape coil and unwind the solder tape; the solder tape traction mechanism is used to pull the solder tape unwound by the solder tape unwinding mechanism onto the welding conveying mechanism; the solder tape cutting mechanism is used to cut the solder tape.

[0019] Through the solder tape unwinding mechanism, the solder tape traction mechanism, and the solder tape cutting mechanism, the solder tape stacking mechanism realizes the automatic stacking of the solder tape.

[0020] In some embodiments, the repaired battery string is transported to the detection device, and the detection device is also used to detect the repaired battery string.

[0021] The welding quality detection of the repaired battery string is realized. When there are defective welds, over-welds, or damaged battery cells in the repaired battery string, the repaired battery string enters the string disassembling device again for further repair. Otherwise, the repaired battery string is finally determined to be a qualified battery string and undergoes final blanking and storage.

[0022] In some embodiments, the battery string repair equipment further includes a battery string regularization device disposed between the string disassembling device and the welding device, and the battery string regularization device is used to regularize the disassembled battery string.

[0023] By setting the battery string regularization device, the regularization of the disassembled battery string is realized.

[0024] In some embodiments, the battery string repair equipment further includes a battery string loading mechanism, a battery string transfer mechanism, and a battery string unloading mechanism, where: the battery string loading mechanism is used to load the battery string to be repaired onto the detection device; the battery string transfer mechanism is used to transfer the battery string to be repaired that has completed detection and positioning onto the string disassembling device; the battery string unloading mechanism is used to unload the repaired battery string from the welding device.

[0025] By setting the battery string loading mechanism and the battery string transfer mechanism, the automatic loading and transfer of the battery string to be repaired are realized, and by setting the battery string unloading mechanism, the automatic unloading of the repaired battery string from the welding device is realized.

[0026] The second aspect of the present invention provides a method for repairing and dividing battery strings, and its technical solution is as follows:

[0027] A method for repairing and dividing battery strings, where the battery string is formed by welding at least two battery cells with solder tape, and this method for repairing battery strings includes:

[0028] Implement the detection and positioning of defective battery cells in the battery string to be repaired;

[0029] Disassemble the defective battery cells and the solder tape welded to the defective battery cells from the battery string to be repaired to obtain at least two strings of disassembled battery strings;

[0030] Weld the replacement cell between the disassembly ends of adjacent disassembled cell strings to obtain the repaired cell string.

[0031] The present invention realizes the automatic disassembly of defective cells in a cell string and the automatic welding of the disassembled cell string and the replacement cell, thereby greatly improving the repair efficiency of the cell string.

[0032] In some embodiments, detecting and positioning defective cells in the cell string to be repaired includes: electrically conducting the cell string to be repaired; obtaining an infrared image of the electrically conducted cell string to be repaired to detect and position the defective cells.

[0033] A detection method with convenient operation is provided, which detects and positions defective cells by obtaining an infrared image of the electrically conducted cell string to be repaired.

[0034] In some embodiments, disassembling the defective cell and the solder tape welded to the defective cell from the cell string to be repaired includes: placing the cell string to be repaired on a carrying mechanism, where the carrying mechanism includes a slide rail and a plurality of carrying platforms, and the plurality of carrying platforms are slidably connected to the slide rail; heating the first cell and the second cell on both sides of the defective cell in the cell string to be repaired so that the solder tape connecting the first cell and the defective cell is separated from the first cell, and the solder tape connecting the second cell and the defective cell is separated from the second cell; pressing the defective cell; driving each of the carrying platforms on one side of the defective cell to slide away from the defective cell, and driving each of the carrying platforms on the other side of the defective cell to slide away from the defective cell.

[0035] A convenient cell disassembly method is provided, which can automatically and quickly disassemble the defective cell and the solder tape connected thereto from the cell string to obtain a disassembled cell string.

[0036] In some embodiments, welding the replacement cell between the disassembly ends of adjacent disassembled cell strings includes: placing the first disassembled cell string on a welding conveying device; stacking the first half of the first solder tape on the disassembly end of the first disassembled cell string; stacking the replacement cell on the second half of the first solder tape; stacking the first half of the second solder tape on the replacement cell; stacking the disassembly end of the second disassembled cell string on the second half of the second solder tape.

[0037] A replacement cell welding method is provided, which can automatically and quickly weld the replacement cell between the disassembly ends of adjacent first and second disassembled cell strings. Description of the Drawings

[0038] Figure 1 It is a schematic top view structure of the cell string;

[0039] Figure 2 It is a schematic side view structure diagram of a battery string;

[0040] Figure 3 It is a schematic structure diagram of the battery string repair equipment provided by the embodiment of the present invention;

[0041] Figure 4 It is a schematic diagram of the battery string disassembling process of the disassembling device in the embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the disassembled battery string;

[0043] Figures 1 to 5 It includes:

[0044] Detection device 1;

[0045] Disassembling device 2: Carrying mechanism 21, guide rail 211, carrying platform 212, pressing mechanism 22;

[0046] Welding device 3: Battery cell stacking mechanism 31, welding tape stacking mechanism 32, welding conveying mechanism 33, welding mechanism 34, tooling circulation conveying mechanism 35;

[0047] Battery string regularization device 4;

[0048] Battery string loading mechanism 5;

[0049] Battery string transfer mechanism 6;

[0050] Battery string unloading mechanism 7;

[0051] Battery string 100, welding tape 200, front battery cell 101, rear battery cell 102, defective battery cell 103, first battery cell 104, second battery cell 105, first welding tape 200a, second welding tape 200b. Detailed implementation manners

[0052] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0053] The traditional battery string repair method generally disassembles the defective battery cell and the welding tape thereon from the battery string manually, and then welds the replacement battery cell to the disassembled position. However, with the development of battery technology, the existing battery strings are generally welded by multi-main-grid battery cells, and the number of welding tapes welded on the battery cells is large. The workload of manually disassembling the defective battery cells is large and the efficiency is low.

[0054] In view of this, the present invention provides a battery string repair device and a repair method, which can realize the automatic repair of a battery string containing defective solar cells, that is, replacing the defective solar cells in the battery string with qualified solar cells. Among them:

[0055] The battery string is formed by welding at least two solar cells with solder tapes. Figure 1 and Figure 2 Fig. shows a typical structure of a battery string 100. Among the adjacent two solar cells in the battery string 100, the front solar cell 101 and the rear solar cell 102 are welded with a solder tape 200. Among them, the first half of the solder tape 200 is welded on the first surface (such as the upper surface) of the front solar cell 101, and the second half of the solder tape 200 is welded on the second surface (such as the lower surface) of the rear solar cell 102.

[0056] The defective solar cell refers to a damaged solar cell, or a solar cell with a virtual solder joint or an over-soldered joint thereon.

[0057] As Figure 3 shown, the battery string repair device provided by the present invention includes a detection device 1, a string-disassembling device 2 and a welding device 3. Among them:

[0058] The detection device 1 is used to detect and locate the defective solar cells in the battery string to be repaired.

[0059] The string-disassembling device 2 is used to disassemble the defective solar cells and the solder tapes welded on the defective solar cells from the battery string to be repaired, so as to obtain at least two disassembled battery strings.

[0060] For example, when there is one defective solar cell in the battery string to be repaired, or there are two or more consecutive defective solar cells, after the defective solar cells are disassembled, two disassembled battery strings are obtained. Another example is that when there are two defective solar cells in the battery string to be repaired and the positions of the two defective solar cells are not adjacent, after the defective solar cells are disassembled, three disassembled battery strings can be obtained.

[0061] The welding device 3 is used to weld the replacement solar cells between the disassembled ends of each adjacent disassembled battery string, so as to obtain the repaired battery string. That is, the position of the replacement solar cell in the repaired battery string is the same as the position of the original defective solar cell in the battery string to be repaired.

[0062] It can be seen that through the cooperation of the detection device 1, the string-disassembling device 2 and the welding device 3, the battery string repair device provided by the present invention realizes the automatic disassembly of the defective solar cells in the battery string, and realizes the automatic welding of the disassembled battery strings and the replacement solar cells, thereby greatly improving the repair efficiency of the battery string.

[0063] Optionally, the detection device includes a conduction mechanism and an infrared imaging mechanism, where: the conduction mechanism is used to electrically conduct the battery string to be repaired. After the battery string to be repaired is conducted, the qualified battery cells are in a fully conductive state, with a large current and a relatively high temperature on them. However, the defective battery cells cannot be fully conducted, so the current on them is small and the temperature is low.

[0064] The infrared imaging mechanism is used to obtain the infrared image of the battery string to be repaired that has been conducted. The qualified battery cells with a relatively high temperature are brighter in the infrared image, and the defective battery cells with a relatively low temperature are darker in the infrared image. By locating the darker areas in the infrared image, the infrared imaging mechanism can detect and locate the defective battery cells.

[0065] Optionally, as Figure 4 shown, the string disassembling device 2 includes a carrying mechanism 21, a disassembling mechanism, a pressing mechanism 22 and a driving mechanism, where:

[0066] The carrying mechanism 21 is used to carry the battery string 100 to be repaired. The carrying mechanism 21 includes a slide rail 211 and a plurality of carrying platforms 212. The plurality of carrying platforms 212 are slidably connected to the slide rail 211. Optionally, each carrying platform 212 carries one battery cell in the battery string 100 to be repaired.

[0067] The disassembling mechanism is located on the carrying platform 212. The disassembling mechanism is used to heat the first battery cell 104 and the second battery cell 105 on both sides of the defective battery cell 103 in the battery string 100 to be repaired, so that the solder tape connecting the first battery cell 104 and the defective battery cell 103 is softened by heating and separated from the first battery cell, and the solder tape connecting the second battery cell 105 and the defective battery cell 103 is softened by heating and separated from the second battery cell 105. The separation mentioned here means that the welding between the solder tape and the battery cell is released. Of course, at this time, the solder tape still adheres to the battery cell.

[0068] Optionally, the disassembling mechanism includes heating components respectively arranged in each carrying platform 212 and corresponding to each carrying platform 212 one by one. Each heating component independently heats the corresponding carrying platform 212. In this way, the disassembling mechanism can achieve fixed-point heating of specific target battery cells.

[0069] The pressing mechanism 22 is used to press the defective battery cell 103. Optionally, in addition to being able to move up and down in the vertical direction to perform the pressing action, the pressing mechanism 22 can also translate along the extension direction of the battery string, so as to translate above the defective battery cell 103 to be pressed.

[0070] The driving mechanism includes a first driving part and a second driving part. Among them, the first driving part is used to drive each carrier 212 located on one side (the right side in the figure) of the defective cell 103 to slide away from the defective cell 103, and the second driving part is used to drive each carrier located on the other side (the left side in the figure) of the defective cell 103 to slide away from the defective cell 103.

[0071] Continue to refer to Figure 4 As shown, the specific disassembly process of the current defective cell 103 by the string disassembly device 2 is as follows:

[0072] First, control the disassembly mechanism to heat the first cell 104 and the second cell 105 on both sides of the defective cell 103 in the battery string 100 to be repaired, so that the solder tape 200a connecting the first cell 104 and the defective cell 103 is separated from the first cell, and the solder tape 200b connecting the second cell 105 and the defective cell 103 is separated from the second cell 105. Of course, since the defective cell 103 is not directly heated, the welding of the solder tape 200a and the solder tape 200b to the defective cell 103 is not released.

[0073] Next, control the pressing mechanism 22 to press down, so as to press the defective cell 103 and the solder tape 200a and the solder tape 200b thereon

[0074] Finally, control the first driving part to drive each carrier 212 located on the right side of the defective cell 103 to slide away from the defective cell 103 to the right. At the same time, control the second driving part to drive each carrier 212 located on the left side of the defective cell 103 to slide away from the defective cell 103 to the left. In this way, as Figure 5 shown, the defective cell 103 pressed by the pressing mechanism 22 and the solder tape 200a and the solder tape 200b thereon are disassembled from the battery string, and two disassembled battery strings are obtained. Among them, the first cell 104 constitutes the disassembly end of one disassembled battery string, and the second cell 105 constitutes the disassembly end of the other disassembled battery string.

[0075] Of course, if there are still defective cells in the two disassembled battery strings, repeat the above disassembly process for the two disassembled battery strings until there are no defective cells in each obtained disassembled battery string.

[0076] As Figure 3As shown, optionally, the welding device 3 includes a battery string stacking mechanism, a battery cell stacking mechanism 31, a solder tape stacking mechanism 32, a welding conveying mechanism 33, and a welding mechanism 34, where: the battery string stacking mechanism, the battery cell stacking mechanism 31, and the solder tape stacking mechanism 32 stack the disassembled battery string, the replaced battery cells, and the solder tape onto the welding conveying mechanism 34. The welding conveying mechanism 33 conveys the stacked disassembled battery string, replaced battery cells, and solder tape to the welding mechanism 34. The welding mechanism 34 welds the stacked disassembled battery string, replaced battery cells, and solder tape together to form a repaired battery string.

[0077] Specifically, the specific process of the welding device 3 welding the replaced battery cells between the disassembled ends of the adjacent first disassembled battery string and the second disassembled battery string is as follows:

[0078] The battery string stacking mechanism places the first disassembled battery string on the welding conveying device 33.

[0079] The solder tape stacking mechanism 32 stacks the first half of the first solder tape on the disassembled end of the first disassembled battery string.

[0080] The battery cell stacking mechanism 31 stacks the replaced battery cells on the second half of the first solder tape.

[0081] The solder tape stacking mechanism 32 stacks the first half of the second solder tape on the replaced battery cells.

[0082] The battery string stacking mechanism stacks the disassembled end of the second disassembled battery string on the second half of the second solder tape.

[0083] At this point, the stacking of the disassembled battery string, replaced battery cells, and solder tape is completed. Then, the welding conveying mechanism 33 conveys the stacked disassembled battery string, replaced battery cells, and solder tape to the welding mechanism 34, and the welding mechanism 34 welds the stacked disassembled battery string, replaced battery cells, and solder tape together, that is, a repaired battery string is formed.

[0084] Of course, during the process of the welding mechanism 34 welding the replaced battery cells, there may still be cases of insufficient soldering or over-soldering, and during the process of disassembling and welding the battery cells, there is also a possibility of generating new damaged battery cells. Therefore, it is necessary to detect the repaired battery string again.

[0085] In view of this, optionally, the repaired battery string is transported to the detection device 2, and the detection device 2 performs the detection on the repaired battery string. When there are insufficiently soldered, over-soldered battery cells or damaged battery cells in the repaired battery string, the repaired battery string enters the string disassembling device 2 for further repair. Otherwise, the repaired battery string is discharged and stored as a qualified battery string from the detection device 2.

[0086] Continue to refer to Figure 3As shown, optionally, the welding device 3 further includes a tooling circulation conveying mechanism 35 disposed on the side of the welding conveying mechanism 33. The tooling circulation conveying mechanism 35 is used for circulating and conveying the pressing tooling.

[0087] Before the welding mechanism 34 performs welding, the battery stack mechanism 31 picks up the pressing tooling from the tooling circulation conveying tooling 35 and transports the picked-up tooling to the stacked replacement battery slices, thereby pressing the welding tape on the replacement battery slices onto the replacement battery slices, ultimately improving the welding effect of the welding mechanism 34 and reducing the occurrence of virtual welding.

[0088] After the welding mechanism 34 completes welding, the battery stack mechanism 31 transports the pressing tooling pressed on the replacement battery slices back to the tooling circulation conveying tooling 35.

[0089] Continue to refer to Figure 3 As shown, optionally, the welding tape stacking mechanism 32 includes a welding tape unwinding mechanism, a welding tape traction mechanism, and a welding tape cutting mechanism, where: the welding tape unwinding mechanism is used to support the welding tape coil and unwind the welding tape. The welding tape traction mechanism is used to pull the welding tape unwound by the welding tape unwinding mechanism onto the welding conveying mechanism 33 and make the end of the welding tape located above the target laying position. The welding tape cutting mechanism is used to cut the welding tape so that the cut welding tape falls to the target laying position.

[0090] It can be seen that through the cooperation of the welding tape unwinding mechanism, the welding tape traction mechanism, and the welding tape cutting mechanism, the welding tape stacking mechanism realizes the automatic stacking of the welding tape.

[0091] Optionally, the welding mechanism includes a welding light box disposed above or below the welding conveying mechanism 33. When the stacked disassembled battery string, replacement battery slices, and welding tape pass under or above the welding light box under the conveyance of the welding conveying mechanism 3, the welding light box heats the replacement battery slices and the battery slices on both sides of the replacement battery slices, so that the welding tape at the corresponding position melts, thereby welding the replacement battery slices between the disassembled ends of the disassembled battery string.

[0092] Of course, the welding light box can also be disposed on the translation drive mechanism, and the translation drive mechanism drives the welding light box to translate along the welding conveying mechanism 33, so as to move above the stacked disassembled battery string, replacement battery slices, and welding tape on the welding conveying mechanism 3, thereby welding the replacement battery slices between the disassembled ends of the disassembled battery string.

[0093] Optionally, adsorption holes are provided on the bearing surface of the welding conveying mechanism 33, and a preheating mechanism is provided below the bearing surface of the welding conveying mechanism 33. Among them, by providing adsorption holes on the bearing surface of the welding conveying mechanism 33, the adsorption positioning of the stacked disassembled battery strings, replaced battery cells and welding tapes is realized. And by providing a preheating mechanism below the bearing surface of the welding conveying mechanism 33, the preheating and softening of the welding tapes are realized, thereby shortening the welding time of the welding structure 34 and improving the welding efficiency.

[0094] Continue to refer to Figure 3 As shown, optionally, the battery string repair equipment in the present invention further includes a battery string regularization device 4 provided between the string disassembling device 2 and the welding device 3. The battery string regularization device 4 is used to regularize the disassembled battery strings, so that the battery string stacking mechanism can pick up the disassembled battery strings more smoothly and stack the disassembled battery strings on the welding conveying mechanism 33. The battery string regularization device 4 regularizes each disassembled battery string one by one, or can also complete the unified regularization of all the disassembled battery strings sequentially.

[0095] Continue to refer to Figure 3 As shown, optionally, the battery string repair equipment of the present invention further includes a battery string loading mechanism 5, a battery string transfer mechanism 6 and a battery string unloading mechanism 7, wherein: the battery string loading mechanism 5 is used to load the battery string to be repaired onto the detection device 1. The battery string transfer mechanism 6 is used to transfer the battery string to be repaired that has completed detection and positioning to the string disassembling device 2. The battery string unloading mechanism 7 is used to unload the repaired battery string from the welding device 3.

[0096] It can be seen that by providing the battery string loading mechanism 5 and the battery string transfer mechanism 6, the battery string repair equipment of the present invention realizes the automatic loading and transfer of the battery string to be repaired, and by providing the battery string unloading mechanism 7, the automatic unloading of the repaired battery string from the welding device is realized.

[0097] The above has described the present invention in sufficient detail and with a certain degree of particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present invention should fall within the protection scope of the present invention. The scope of protection required by the present invention is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A battery string repair device, wherein the battery string is formed by welding at least two battery cells with a welding tape, and is characterized in that, The battery string repair device includes a detection device, a string disassembling device, and a welding device, where: The detection device is used to detect and locate defective solar cells in the battery string to be repaired; The string disassembling device is used to disassemble the defective solar cell and the solder tape welded to the defective solar cell from the battery string to be repaired, obtaining at least two disassembled battery strings; The welding device is used to weld replacement solar cells between the disassembled ends of adjacent disassembled battery strings to obtain a repaired battery string; The welding device includes a battery string stacking mechanism, a solar cell stacking mechanism, a solder tape stacking mechanism, a welding conveying mechanism, and a welding mechanism, where: The battery string stacking mechanism, the solar cell stacking mechanism, and the solder tape stacking mechanism stack the disassembled battery strings, replacement solar cells, and solder tapes onto the welding conveying mechanism; The welding conveying mechanism conveys the stacked disassembled battery strings, replacement solar cells, and solder tapes to the welding mechanism; The welding mechanism is used to weld the stacked disassembled battery strings, replacement solar cells, and solder tapes together to form the repaired battery string.

2. The battery string repair equipment according to claim 1, characterized in that: The detection device includes a conduction mechanism and an infrared imaging mechanism, where: The conduction mechanism is used to electrically conduct the battery string to be repaired; The infrared imaging mechanism is used to obtain an infrared image of the electrically conducted battery string to be repaired to detect and locate the defective solar cell.

3. The battery string repair equipment according to claim 1, characterized in that, The string disassembling device includes a carrying mechanism, a disassembling mechanism, a pressing mechanism, and a driving mechanism, where: The carrying mechanism is used to carry the battery string to be repaired; the carrying mechanism includes a slide rail and a plurality of carrying platforms, and the plurality of carrying platforms are slidably connected to the slide rail; The disassembling mechanism is located on the carrying platform, and the disassembling mechanism is used to heat the first solar cell and the second solar cell on both sides of the defective solar cell in the battery string to be repaired, so that the solder tape connecting the first solar cell and the defective solar cell is separated from the first solar cell, and the solder tape connecting the second solar cell and the defective solar cell is separated from the second solar cell; The pressing mechanism is used to press the defective solar cell; The driving mechanism includes a first driving part and a second driving part. The first driving part is used to drive each of the carrying platforms on one side of the defective solar cell to slide away from the defective solar cell, and the second driving part is used to drive each of the carrying platforms on the other side of the defective solar cell to slide away from the defective solar cell.

4. The battery string repair equipment according to claim 1, characterized in that, The welding device further includes a tooling circulating conveying mechanism arranged on the side of the welding conveying mechanism; The tooling circulating conveying mechanism is used to circulate and convey the pressing tooling; The solar cell stacking mechanism is further used to pick up the pressing tooling from the tooling circulating conveying mechanism and carry the picked-up tooling onto the stacked replacement solar cells to press the solder tape on the replacement solar cells onto the replacement solar cells.

5. The battery string repair equipment according to claim 1, characterized in that, The solder tape stacking mechanism includes a solder tape unwinding mechanism, a solder tape traction mechanism, and a solder tape cutting mechanism, where: The solder tape unwinding mechanism is used to support the solder tape coil and unwind the solder tape; The solder tape traction mechanism is used to pull the solder tape unwound by the solder tape unwinding mechanism onto the welding conveying mechanism; The solder strip cutting mechanism is used to cut the solder strip.

6. The battery string repair equipment according to claim 1, characterized in that, The repaired battery string is transported to the detection device, and the detection device is also used to detect the repaired battery string.

7. The battery string repair equipment according to claim 1, wherein, The battery string repair equipment further includes a battery string alignment device arranged between the string disassembling device and the welding device; The battery string alignment device is used to align the disassembled battery string.

8. The battery string repair equipment according to claim 1, characterized in that, The battery string repair equipment further includes a battery string loading mechanism, a battery string transfer mechanism and a battery string unloading mechanism, where: The battery string loading mechanism is used to load the battery string to be repaired onto the detection device; The battery string transfer mechanism is used to transfer the battery string to be repaired that has completed detection and positioning onto the string disassembling device; The battery string unloading mechanism is used to unload the repaired battery string from the welding device.

9. A method for repairing a battery string, wherein the battery string is formed by welding at least two battery cells with a solder tape, and is characterized in that, The battery string repair method includes: Performing detection and positioning on the defective battery cells in the battery string to be repaired; Disassembling the defective battery cells and the solder strips welded to the defective battery cells from the battery string to be repaired to obtain at least two strings of disassembled battery strings; Welding replacement battery cells between the disassembled ends of each adjacent pair of the disassembled battery strings to obtain a repaired battery string; The welding the replacement battery cells between the disassembled ends of each adjacent pair of the disassembled battery strings includes: Placing the first disassembled battery string on the welding conveyor device; Stacking the front half of the first solder strip on the disassembled end of the first disassembled battery string; Stacking the replacement battery cell on the rear half of the first solder strip; Stacking the front half of the second solder strip on the replacement battery cell; Stacking the disassembled end of the second disassembled battery string on the rear half of the second solder strip.

10. The method for repairing a battery string according to claim 9, wherein, The performing detection and positioning on the defective battery cells in the battery string to be repaired includes: Electrically conducting the battery string to be repaired; Obtaining an infrared image of the electrically conducted battery string to be repaired to perform detection and positioning on the defective battery cells.

11. The method for repairing a battery string according to claim 9, wherein, The disassembling the defective battery cells and the solder strips welded to the defective battery cells from the battery string to be repaired includes: Placing the battery string to be repaired on the carrying mechanism, where the carrying mechanism includes a slide rail and a plurality of carrying platforms, and the plurality of carrying platforms are slidably connected to the slide rail; Heating the first battery cell and the second battery cell on both sides of the defective battery cell in the battery string to be repaired so that the solder strip connecting the first battery cell and the defective battery cell is separated from the first battery cell, and the solder strip connecting the second battery cell and the defective battery cell is separated from the second battery cell; Pressing the defective battery cell; Driving each of the carrying platforms on one side of the defective battery cell to slide away from the defective battery cell, and driving each of the carrying platforms on the other side of the defective battery cell to slide away from the defective battery cell.

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