Cell soldering apparatus and soldering method

Abstract

A cell soldering apparatus, comprising a cell supply mechanism (1), a solder ribbon spreading mechanism (2), a first handling mechanism (3), a soldering support mechanism (4), a soldering mechanism (5), a second handling mechanism (6), a cell transfer mechanism (7), and an adhesive applying mechanism (8), wherein the solder ribbon spreading mechanism spreads a first solder ribbon group onto the soldering support mechanism; the first handling mechanism stacks a cell onto the first solder ribbon group; the solder ribbon spreading mechanism spreads a second solder ribbon group onto the cell; the soldering mechanism solders the first solder ribbon group and the second solder ribbon group to the cell; the second handling mechanism places the soldered cell on the cell transfer mechanism; and the adhesive applying mechanism applies adhesive to the cell when the cell transfer mechanism moves to an adhesive application station (K), such that the first solder ribbon group and the second solder ribbon group are bonded to the cell. Further disclosed is a cell soldering method. The cell soldering apparatus enables automatic soldering of solder ribbon groups to two surfaces of a cell, and automatic application of adhesive to the solder ribbon groups soldered to the two surfaces of the cell.

Description

A battery piece welding device and a welding method TECHNICAL FIELD

[0001] The present application relates to the field of photovoltaic cell module production equipment, in particular to a battery piece welding device and a welding method. BACKGROUND

[0002] In order to ensure the connection strength between the welding strip group and the cell piece, one kind of welding process of the busbar-free cell string is to weld the cell pieces into a string through the welding strip group, and then to coat the adhesive on the welding strip group through the adhesive coating device, so that the welding strip group and the cell piece are bonded.

[0003] When the busbar-free cell string prepared by the above process contains a defective cell piece to be replaced, the connecting welding strip between the defective cell piece and the adjacent cell piece adjacent to it needs to be cut off, and then the defective cell piece is removed from the cell string, and the replacement cell piece with the welding strip group is placed in the position left by the removed defective cell piece, and the welding strip group on the replacement cell piece is lap welded with the welding strip group on the adjacent cell piece.

[0004] Before the busbar-free cell string is formally repaired, the corresponding replacement cell piece needs to be prepared in advance, that is, the welding strip group is welded to both sides of the cell piece, and the adhesive is applied to the welding strip group on both sides of the cell piece. Due to the lack of such a replacement cell piece preparation device, at present, the welding strip group is generally welded to the cell piece by manual operation, and then the adhesive is applied to both sides of the cell piece to obtain the replacement cell piece. The efficiency of manually preparing the replacement cell piece is low, and it is difficult to meet the batch repair needs of the busbar-free cell string. SUMMARY

[0005] In view of the technical problem that the traditional string welding equipment is difficult to implement the welding of the replacement cell piece, the present application provides a battery piece welding device, and the detailed technical solution is as follows:

[0006] A battery piece welding device, comprising a battery piece supply mechanism, a welding strip laying mechanism, a first conveying mechanism, a welding carrier mechanism, a welding mechanism, a second conveying mechanism, a battery piece transferring mechanism and an adhesive applying mechanism, wherein:

[0007] The welding carrier mechanism is configured to reciprocate in a first horizontal direction, and a first feeding station, a welding station and a first discharging station are sequentially arranged on the movement path of the welding carrier mechanism;

[0008] The welding strip laying mechanism is used for laying a first welding strip group on the welding carrier mechanism located at the first feeding station; the first conveying mechanism is used for picking up a battery piece from the battery piece supply mechanism and stacking the picked-up battery piece on the first welding strip group; and the welding strip laying mechanism is further used for stacking a second welding strip group on the battery piece;

[0009] The welding mechanism is arranged at the welding station, and the welding mechanism is used for welding the first and second solder ribbon groups on the battery piece when the welding carrier mechanism moves to the welding station;

[0010] The second carrying mechanism is arranged at the first blanking station, and the second carrying mechanism is used for picking up the battery piece with completed welding from the welding carrier mechanism when the welding carrier mechanism moves to the first blanking station;

[0011] The battery piece transfer mechanism is configured to reciprocate in a second horizontal direction, and the second horizontal direction is parallel to or intersects with the first horizontal direction. The second blanking station and the gluing station are sequentially arranged on the moving path of the battery piece transfer mechanism.

[0012] The second carrying mechanism is further used for placing the picked battery piece with completed welding on the battery piece transfer mechanism at the second blanking station;

[0013] The gluing mechanism is arranged at the gluing station, and the gluing mechanism is used for gluing the battery piece when the battery piece transfer mechanism moves to the gluing station, so that the first and second solder ribbon groups are bonded to the battery piece.

[0014] The battery piece welding device provided by the application can automatically weld the solder ribbon groups to the two surfaces of the battery piece and automatically glue the solder ribbon groups welded on the two surfaces of the battery piece, thereby realizing the automatic preparation of the replacement battery piece required for the repair of the battery string without the main grid. The application improves the preparation efficiency of the replacement battery piece.

[0015] In some embodiments, the battery piece welding device further comprises a turnover mechanism arranged on the moving path of the battery piece transfer mechanism, and the turnover mechanism is arranged before the gluing mechanism. The battery piece transfer mechanism is used for transferring the battery piece with completed welding to the gluing station, and the gluing mechanism is used for gluing the second solder ribbon group welded on the first surface of the battery piece. The battery piece transfer mechanism is further used for transferring the battery piece with completed first surface gluing back to the turnover mechanism, and the turnover mechanism is used for turning the battery piece with completed first surface gluing on the battery piece transfer mechanism by 180º, so that the second surface of the battery piece faces upward. The battery piece transfer mechanism is further used for transferring the battery piece with completed turnover to the gluing station again, and the gluing mechanism is used for gluing the first solder ribbon group welded on the second surface of the battery piece.

[0016] By arranging the turnover mechanism, the turnover of the battery piece is realized, so that the gluing of the two surfaces of the battery piece can be completed in sequence by arranging only one gluing mechanism, thereby reducing the gluing cost. In addition, the length of the moving path of the battery piece transfer mechanism is shortened, and the installation space of the battery piece welding device of the application is saved.

[0017] In some embodiments, a solidification station and a glue application detection station are further arranged at the rear of the glue application station along the moving path of the cell piece transfer mechanism, and the cell piece welding device further comprises a solidification mechanism and a glue application detection mechanism; the solidification mechanism is arranged at the solidification station and is used for solidifying the glue applied on the first surface or the second surface of the cell piece; the glue application detection mechanism is arranged at the glue application detection station and is used for detecting the glue application quality of the first surface or the second surface of the cell piece.

[0018] By arranging the solidification mechanism, the glue applied on the surface of the cell piece is quickly solidified, and the working pace of the subsequent processing stations is ensured. By arranging the glue application detection mechanism, the automatic detection of the glue application quality of the cell piece is realized.

[0019] In some embodiments, the turnover mechanism comprises a turnover part and a taking and placing part, wherein: the turnover part is used for sucking the cell piece on which the first surface glue application is completed on the cell piece transfer mechanism, and turning over the cell piece on which the first surface glue application is completed by 180º so that the second surface of the cell piece faces upward; the taking and placing part is used for sucking the cell piece on which the turnover is completed from the turnover part, and placing the cell piece on which the turnover is completed back to the cell piece transfer mechanism.

[0020] By cooperation of the turnover part and the taking and placing part, the turnover mechanism realizes the automatic turnover of the cell piece on which the first surface glue application is completed on the cell piece transfer mechanism.

[0021] In some embodiments, the cell piece welding device further comprises a regulation mechanism arranged opposite to the moving path of the cell piece transfer mechanism, after the taking and placing part places the cell piece on which the turnover is completed back to the cell piece transfer mechanism, the regulation mechanism is used for implementing position correction of the cell piece on which the turnover is completed carried on the cell piece transfer mechanism.

[0022] During the process of taking and placing the cell piece, and during the process of turning over the cell piece, the position of the cell piece is inevitably deviated, by arranging the regulation mechanism opposite to the moving path of the cell piece transfer mechanism, the position correction of the cell piece on which the turnover is completed placed back to the cell piece transfer mechanism is realized, so as to ensure the subsequent glue application precision.

[0023] In some embodiments, the cell piece transfer mechanism comprises a first moving module and a first carrying table, wherein the first carrying table is connected to the moving part of the first moving module, the first carrying table is used for carrying and sucking the cell piece, and the first moving module is used for driving the first carrying table to move reciprocally.

[0024] A cell piece transfer mechanism with simple structure is provided, which realizes the sucking and carrying of the cell piece and the transfer of the cell piece, so as to send the cell piece at the second feeding station to the glue application station for glue application.

[0025] In some embodiments, the gluing station comprises a first gluing station and a second gluing station arranged along the moving path of the cell piece conveying mechanism, and a turnover station is further arranged between the first gluing station and the second gluing station; the cell piece welding device further comprises a turnover mechanism arranged at the turnover station; the gluing mechanism comprises a first gluing part arranged at the first gluing station and a second gluing part arranged at the second gluing station; the cell piece conveying mechanism is used to convey the cell piece to the first gluing station, and the first gluing part is used to glue the second group of welding strips welded to the first surface of the cell piece; the cell piece conveying mechanism is further used to convey the cell piece on which the gluing on the first surface is completed to the turnover station, and the turnover mechanism is used to turn over the cell piece on which the gluing on the first surface is completed by 180° so that the second surface of the cell piece faces upward; the cell piece conveying mechanism is further used to convey the turned-over cell piece to the second gluing station, and the second gluing part is used to glue the first group of welding strips welded to the second surface of the cell piece.

[0026] In this way, the cell piece conveying mechanism does not need to turn back during the gluing process, and only needs to drive the cell piece to move in one direction for one stroke, and the gluing mechanism and the turnover mechanism can cooperate with each other to continuously complete the gluing operation on the first surface and the second surface of the cell piece, thereby improving the gluing efficiency of the cell piece.

[0027] In some embodiments, the cell piece supply mechanism comprises a conveying mechanism, a transfer mechanism and a positioning mechanism, wherein: the conveying mechanism is arranged on one side of the welding carrying mechanism and is used to convey the magazine containing the cell pieces to the positioning mechanism; the transfer mechanism is located between the conveying mechanism and the positioning mechanism, and is used to pick up the cell pieces from the magazine and transfer the picked-up cell pieces to the positioning mechanism; the positioning mechanism is configured to position the cell pieces to obtain the position information of the cell pieces; and the first carrying mechanism is used to pick up the cell pieces on which the positioning is completed from the positioning mechanism and stack the picked-up cell pieces on the first group of welding strips according to the position information of the cell pieces.

[0028] Through the cooperation of the conveying mechanism, the transfer mechanism and the positioning mechanism, the cell piece supply mechanism realizes the automatic feeding of the cell pieces to be welded to the welding strips and the positioning of the cell pieces, thereby ensuring that the first carrying mechanism can accurately stack the cell pieces on the first group of welding strips according to the position information of the cell pieces obtained from the cell piece supply mechanism.

[0029] In some embodiments, the cell piece welding device further comprises a second carrying table for carrying a tooling; and the first carrying mechanism is further used to pick up the tooling from the second carrying table and place it on the second group of welding strips at the first feeding station to press the second group of welding strips onto the cell piece.

[0030] By setting the second bearing table, the supply of the tool is realized, so that the first carrying mechanism can pick up the tool from the second bearing table and place the tool on the second welding ribbon group at the first feeding station, ensuring that the second welding ribbon group can be tightly pressed on the upper surface of the battery piece, avoiding the misalignment of the second welding ribbon group and the battery piece during the movement of the welding bearing mechanism.

[0031] In some embodiments, the battery piece welding device further comprises a third carrying mechanism and a second moving module, wherein: a tool unloading station is further arranged between the welding station and the first unloading station on the moving path of the welding bearing mechanism; the second bearing table is arranged on one side of the welding bearing mechanism and is installed on the driving end of the second moving module, and the second moving module is used to drive the second bearing table to reciprocate and translate along the first horizontal direction; the first carrying mechanism is used to pick up the tool from the second bearing table moving to the side of the first feeding station; the third carrying mechanism is arranged at the tool unloading station, and the third carrying mechanism is used to remove the tool from the welding bearing mechanism when the welding bearing mechanism moves from the welding station to the tool unloading station, and place the removed tool back on the second bearing table moving to the side of the tool unloading station; the second bearing table returns to the side of the first feeding station after receiving the tool placed back by the third carrying mechanism.

[0032] It can be seen that by controlling the second bearing table to reciprocate between the side of the first feeding station and the side of the tool unloading station, the caching and recycling of the tool are realized.

[0033] In some embodiments, a heating element is arranged in the second bearing table, and the heating element is used to preheat the tool carried on the tool caching table.

[0034] After the preheated tool is pressed and placed on the second welding ribbon group, the heating of the second welding ribbon group and the battery piece can be implemented, thereby shortening the welding time of the welding mechanism and improving the welding efficiency.

[0035] In some embodiments, the battery piece welding device comprises a tool regularizing part arranged on the moving path of the second bearing table, and the tool regularizing part is used to position the tool placed back on the second bearing table.

[0036] By arranging the tool regularizing part on the moving path of the second bearing table, the position of the tool placed back on the second bearing table is regularized. After the second bearing table moves to the side of the first feeding station, the first carrying mechanism can smoothly pick up the tool from the second bearing table, and ensure that the tool is accurately pressed and placed on the second welding ribbon group.

[0037] In some embodiments, the first carrying mechanism comprises a driving part, a first picking part and a second picking part, wherein: the first picking part and the second picking part are both mounted on the driving end of the driving part; the driving part is used to drive the first picking part to pick the battery piece from the battery piece supply mechanism and stack the picked battery piece on the first solder strip group; the driving part is also used to drive the second picking part to pick the tooling from the second carrying table and drive the second picking part to press the picked tooling on the second solder strip group.

[0038] By mounting the first picking part and the second picking part on the driving end of the driving part, the picking and placing of the battery piece and the picking and placing of the tooling are both driven by one driving part, so that the structure is compact and the cost of the battery piece welding device is reduced.

[0039] In some embodiments, the welding carrying mechanism comprises a third moving module and a third carrying table, wherein: the third carrying table is connected to the moving part of the third moving module; the third carrying table is provided with suction holes for suctioning the battery piece; the first solder strip group, the battery piece and the second solder strip group are carried on the third carrying table; and the third moving module is used to drive the third carrying table to move back and forth.

[0040] The welding carrying mechanism provided has a simple structure and can carry and convey the first solder strip group, the battery piece and the second solder strip group, so that the stacked first solder strip group, battery piece and second solder strip group are conveyed to the welding station and the first discharging station in sequence.

[0041] In some embodiments, the solder strip laying mechanism comprises a solder strip feeding part, a solder strip pulling part, a flux coating part, a solder strip pressing part and a solder strip cutting part, wherein: the solder strip feeding part is configured to provide a plurality of solder strips; the solder strip pulling part is configured to clamp the end of the solder strip and pull the solder strip so that the solder strip passes through the flux coating part, the solder strip pressing part and the solder strip cutting part in sequence; the flux coating part is configured to coat the solder strip with flux; the solder strip pressing part is configured to press the solder strip; the solder strip cutting part is configured to cut the pressed solder strip to obtain the first solder strip group or the second solder strip group; and the solder strip pulling part is also used to lay the first solder strip group on the welding carrying mechanism or stack the second solder strip group on the battery piece.

[0042] Through the cooperation of the solder strip feeding part, the solder strip pulling part, the flux coating part, the solder strip pressing part and the solder strip cutting part, the solder strip laying mechanism realizes the automatic preparation of the first solder strip group and the second solder strip group and the automatic laying of the first solder strip group and the second solder strip group.

[0043] In some embodiments, the battery piece welding device further comprises a battery piece collecting mechanism, the battery piece collecting mechanism is arranged on the moving path of the battery piece transferring mechanism and located behind the gluing mechanism; the battery piece collecting mechanism comprises a lifting part, a docking conveying part and a basket conveying part, wherein: the basket conveying part is arranged at the output end of the battery piece transferring mechanism; the docking conveying part is connected to the movable part of the lifting part; the lifting part is configured to drive the docking conveying part to descend to a basket changing station, so that the docking conveying part is docked with the basket conveying part; the basket conveying part is used to convey an empty basket to the docking conveying part or receive a full basket containing the battery pieces output by the docking conveying part; the lifting part is further configured to drive the docking conveying part to ascend to a piece collecting station, and the battery piece transferring mechanism is further used to extend into the empty basket on the docking conveying part and insert the battery pieces into the slots of the empty basket; the lifting part is further configured to drive the docking conveying part to ascend or descend, so that the battery piece transferring mechanism sequentially inserts the battery pieces into the remaining slots of the empty basket.

[0044] Through the cooperation of the lifting part, the docking conveying part and the basket conveying part, the battery piece collecting mechanism can sequentially stack the battery pieces output by the battery piece transferring mechanism into the basket, and the battery piece collecting mechanism can automatically realize the basket changing operation, thereby improving the collecting efficiency.

[0045] In some embodiments, the battery piece welding device further comprises a detection mechanism and an NG basket; the detection mechanism and the NG basket are arranged on the moving path of the second conveying mechanism; the battery piece transferring mechanism is further used to transfer the battery pieces after gluing back to the second feeding station; the second conveying mechanism is further used to take the battery pieces after gluing away from the battery piece transferring mechanism and transfer them to the detection mechanism; the detection mechanism is used to detect the quality of the battery pieces; the second conveying mechanism is further used to convey the qualified battery pieces to the battery piece transferring mechanism at the second feeding station, and convey the unqualified battery pieces to the NG basket; and the battery piece transferring mechanism is further used to transfer the qualified battery pieces to the battery piece collecting mechanism.

[0046] By arranging the detection mechanism and the NG basket, the detection and classification of the battery pieces after gluing are realized; the qualified battery pieces are collected into the battery piece collecting mechanism and can be used by multiple battery string repair machines in the subsequent process; and the unqualified battery pieces are collected into the NG basket.

[0047] In some embodiments, the battery piece welding device further comprises a suction mechanism arranged above the NG basket, the suction mechanism comprises a rotary driving part and a suction part, the suction part is installed on the driving end of the rotary driving part, and the rotary driving part is used to drive the suction part to rotate vertically; when the suction part rotates to the upward adsorption surface, the unqualified battery pieces on the second conveying mechanism are adsorbed; when the suction part rotates to the downward adsorption surface, the suctioned battery pieces are released into the NG basket.

[0048] In some application scenarios, only the welding of the welding ribbons to the battery piece is required, without the need of the gluing operation. Therefore, after the second conveying mechanism picks up the battery piece with the completed welding ribbons from the welding carrying mechanism, the second conveying mechanism directly transfers the battery piece to the detection mechanism for detection. For the battery piece that fails in the detection, the second conveying mechanism needs to place the battery piece into the NG box. However, the temperature of the battery piece after the welding is very high, and the battery piece is easy to be stuck by the picking part (such as the suction cup) of the second conveying mechanism, and the second conveying mechanism is difficult to directly release the battery piece into the NG box. By setting the suction mechanism, the battery piece can be sucked from the second conveying mechanism and released into the NG box.

[0049] In some embodiments, the detection mechanism comprises at least one of an EL detection part and an appearance detection part, wherein the EL detection part is used to implement EL detection on the battery piece, and the appearance detection part is used to implement appearance detection on the battery piece.

[0050] By setting the detection mechanism, the detection mechanism can realize the detection of the virtual welding, internal defects and appearance defects of the battery piece.

[0051] The application also provides a battery piece welding method, which comprises:

[0052] The welding ribbons are laid on the lower surface and the upper surface of the single battery piece, respectively;

[0053] The battery piece with the laid welding ribbons is heated to weld the welding ribbons to the battery piece;

[0054] The glue points are applied to the welding ribbons on the two surfaces of the welded battery piece, and the glue points are solidified to bond the welding ribbons to the battery piece.

[0055] The battery piece welding method provided by the application can automatically weld the welding ribbons to the two surfaces of the battery piece, and automatically apply glue to the welding ribbons welded on the two surfaces of the battery piece, so as to realize the automatic preparation of the replacement battery piece required for the replacement of the battery string, and the preparation efficiency of the replacement battery piece is improved. BRIEF DESCRIPTION OF DRAWINGS

[0056] FIG. 1 is a structural schematic diagram of the battery piece welding device in the embodiment of the application in a first perspective view;

[0057] FIG. 2 is a partial enlarged view of region A of FIG. 1;

[0058] FIG. 3 is a structural schematic diagram of the battery piece welding device in the embodiment of the application in a second perspective view;

[0059] FIG. 4 is a partial enlarged view of region B of FIG. 2;

[0060] FIG. 5 is a structural schematic diagram of the battery piece welding device in the embodiment of the application in a third perspective view;

[0061] Fig. 6 is a partial enlarged view of the C region of Fig. 5;

[0062] Fig. 7 is a partial enlarged view of the D region of Fig. 5;

[0063] Fig. 8 is a structural schematic view of a second bearing table, a second moving module and a tooling regularizing part in an embodiment of the present application;

[0064] Fig. 9 is a structural schematic view of a battery piece transfer mechanism, a turnover mechanism and a regularizing mechanism in an embodiment of the present application;

[0065] Fig. 10 is a structural schematic view of a first carrying mechanism in an embodiment of the present application;

[0066] Figs. 1 to 10 include:

[0067] A battery piece supply mechanism 1: a conveying mechanism 11, a transfer mechanism 12, a positioning mechanism 13, a positioning platform 131, a positioning camera 132;

[0068] A solder strip laying mechanism 2: a solder strip feeding part 21, a solder strip pulling part 22, a flux coating part 23, a solder strip pressing part 24, a solder strip cutting part 25;

[0069] A first carrying mechanism 3: a driving part 31, a first picking part 32, a second picking part 33;

[0070] A soldering bearing mechanism 4;

[0071] A soldering mechanism 5;

[0072] A second carrying mechanism 6;

[0073] A battery piece transfer mechanism 7: a first moving module 71, a first bearing table 72, a telescopic driving part 73;

[0074] A gluing mechanism 8;

[0075] A turnover mechanism 9: a turnover part 91, a taking and placing part 92, a turnover driving module 911, a turnover plate 912, a moving module 921, a suction plate 922;

[0076] A curing mechanism 10;

[0077] A gluing detection mechanism 110;

[0078] A regularizing mechanism 120;

[0079] A second bearing table 130;

[0080] A second moving module 140;

[0081] A third carrying mechanism 150;

[0082] Tooling regular part 160;

[0083] Battery piece receiving mechanism 170: lifting part 171, docking conveying part 172, basket conveying part 173, upper basket conveying part 1731, lower basket conveying part 1732;

[0084] Detection mechanism 180;

[0085] NG material box 190;

[0086] Suction mechanism 200. DETAILED DESCRIPTION

[0087] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0088] As shown in FIGS. 1-7, the battery piece welding device in the embodiment of the present application comprises a battery piece supply mechanism 1, a welding strip laying mechanism 2, a first carrying mechanism 3, a welding carrying mechanism 4, a welding mechanism 5, a second carrying mechanism 6, a battery piece transferring mechanism 7 and a glue applying mechanism 8, wherein:

[0089] The welding carrying mechanism 4 is configured to reciprocate in a first horizontal direction (such as the X-axis direction in FIG. 1), and a first feeding station E, a welding station F and a first discharging station G are sequentially arranged on the moving path of the welding carrying mechanism 4.

[0090] The welding strip laying mechanism 2 is used to lay the first welding strip group on the welding carrying mechanism 4 at the first feeding station E. The first carrying mechanism 3 is used to pick up the battery piece from the battery piece supply mechanism 1 and stack the picked battery piece on the first welding strip group. The welding strip laying mechanism 2 is also used to stack the second welding strip group on the battery piece.

[0091] The welding mechanism 5 is arranged at the welding station F, and the welding mechanism 5 is used to weld the first welding strip group and the second welding strip group on the battery piece when the welding carrying mechanism 4 moves to the welding station F.

[0092] The second carrying mechanism 6 is arranged at the first discharging station G, and the second carrying mechanism 6 is used to pick up the battery piece after welding from the welding carrying mechanism 4 when the welding carrying mechanism 4 moves to the first discharging station G.

[0093] The battery piece transfer mechanism 7 is configured to reciprocate and translate along a second horizontal direction, which is parallel or intersected with the first horizontal direction. In the embodiment shown in FIG. 1, the second horizontal direction is parallel to the first horizontal direction and is on a different straight line. In this way, the length of the battery piece welding device of the present application can be shortened, and the structure of the battery piece welding device of the present application is more compact. Of course, the second horizontal direction can also be on the same straight line as the first horizontal direction.

[0094] The second feeding station H and the glue applying station K are sequentially arranged on the moving path of the battery piece transfer mechanism 7.

[0095] The second carrying mechanism 6 is also used to place the picked completed-welded battery piece onto the battery piece transfer mechanism 7 located at the second feeding station H.

[0096] The glue applying mechanism 8 is arranged at the glue applying station K, and is used to apply glue to the battery piece when the battery piece transfer mechanism 7 moves to the glue applying station K, so that the first and second groups of welding bands are adhered to the battery piece.

[0097] The first and second groups of welding bands each include a plurality of welding bands arranged at intervals and extending along the first horizontal direction. Generally, the number of welding bands in the first and second groups of welding bands is the same, the number of welding bands in the first group of welding bands is equal to the number of welding bands connected to the lower surface of the defective battery piece in the battery string to be repaired, and the number of welding bands in the second group of welding bands is equal to the number of welding bands connected to the upper surface of the defective battery piece in the battery string to be repaired.

[0098] The welding band is a copper band with a coating. The coating can be a tin coating, a SnBiAg (tin bismuth silver) alloy coating, or other metal or alloy coating.

[0099] The working process of the battery piece welding device in the embodiment of the present application is as follows:

[0100] First, the welding carrying mechanism 4 moves to the first feeding station E.

[0101] The welding band laying mechanism 2 lays the first group of welding bands on the welding carrying mechanism 4. Then, the first carrying mechanism 3 picks up the battery piece from the battery piece supply mechanism 1 and stacks the picked battery piece on the first group of welding bands. Then, the welding band laying mechanism 2 stacks the second group of welding bands on the battery piece.

[0102] Then, the welding carrying mechanism 4 transports the stacked first group of welding bands, battery piece and second group of welding bands to the welding station F. The welding mechanism 4 welds the first and second groups of welding bands to the battery piece.

[0103] The welding carrying mechanism 4 continues to carry the battery piece with the welded welding strip to the first unloading station G, the second carrying mechanism 6 picks up the battery piece with the welded welding strip from the welding carrying mechanism 4, and places the picked-up battery piece with the welded welding strip on the battery piece transfer mechanism 7 which moves to the second loading station H. At the same time, the welding carrying mechanism 4 returns to the first loading station E again to be ready to receive the next first welding strip group, battery piece and second welding strip group.

[0104] The battery piece transfer mechanism 7 transfers the battery piece with the welded welding strip to the gluing station K, and the gluing mechanism 8 completes the gluing of the battery piece.

[0105] The battery piece welding device provided by the embodiment of the present application can automatically weld the welding strip group to the two surfaces of the battery piece, and automatically glue the welding strip group welded on the two surfaces of the battery piece, thereby realizing the automatic preparation of the replacement battery piece required for the replacement of the defective battery piece of the battery string, and improving the preparation efficiency of the replacement battery piece.

[0106] According to the position (head, middle or tail) of the defective battery piece to be replaced in the battery string to be repaired, the corresponding replacement battery piece is classified into a head replacement battery piece, a middle replacement battery piece and a tail replacement battery piece. The welding strip group on the three types of replacement battery pieces may or may not extend out of the battery piece, and the length of the extension out of the battery piece may also be different. In order to meet the feeding requirements of the three types of replacement battery pieces, the replacement battery piece prepared by the battery piece welding device in the embodiment of the present application has the welding strip group on the upper and lower surfaces of the battery piece extending out of the battery piece at a uniform length, and the welding strip group on the replacement battery piece prepared by the device can be cut according to the needs during the formal replacement repair.

[0107] Optionally, the first carrying mechanism 3 stacks the picked-up battery piece on the first welding strip group, so that the first end of the first welding strip group extends outwards towards the first side of the battery piece, and the second end of the first welding strip group is located below the battery piece and does not extend out of the battery piece. The welding strip laying mechanism 2 stacks the second welding strip group on the battery piece, so that the first end of the second welding strip group is located above the battery piece and does not extend out of the battery piece, and the second end of the second welding strip group extends outwards towards the second side of the battery piece. In this way, it can be ensured that one end of the first welding strip group and the second welding strip group welded to the two surfaces of the battery piece extends outwards from the first side and the second side of the battery piece respectively. Subsequently, when the battery piece is supplied to the subsequent repair machine as a replacement battery piece, at least one of the first welding strip group and the second welding strip group can be cut according to the specific type of the replacement battery piece required, so as to cut the battery piece into the head replacement battery piece, the middle replacement battery piece or the tail replacement battery piece required.

[0108] Of course, the length requirements of the first and second solder strips in the head-replacement battery piece, the middle-replacement battery piece, or the tail-replacement battery piece can be directly used to control the solder strip laying mechanism in the battery piece welding device of the present application to lay the first and second solder strips meeting the length requirements on the upper and lower surfaces of the battery piece, so as to prepare the head-replacement battery piece, the middle-replacement battery piece, or the tail-replacement battery piece that can be directly used for the repair machine.

[0109] In the embodiments shown in FIGS. 1-5, the battery piece welding device in the embodiments of the present application further includes a turnover mechanism 9 arranged on the moving path of the battery piece transfer mechanism 7, and the turnover mechanism 9 is arranged before the gluing mechanism 8. After the second carrying mechanism 6 places the battery piece with completed welding on the battery piece transfer mechanism 7 moving to the second feeding station H, the battery piece transfer mechanism 7 transfers the battery piece to the gluing station K, and the gluing mechanism 8 glues the second solder strip group welded on the first surface of the battery piece. The battery piece transfer mechanism 6 transfers the battery piece with completed first surface gluing back to the turnover mechanism 9, and the turnover mechanism 9 turns the battery piece with completed first surface gluing on the battery piece transfer mechanism 7 by 180° so that the second surface of the battery piece faces upward. The battery piece transfer mechanism 7 transfers the battery piece with completed turnover to the gluing station K again, and the gluing mechanism 8 glues the first solder strip group welded on the second surface of the battery piece.

[0110] By arranging the turnover mechanism 9, the turnover of the battery piece during the gluing process is realized, so that only one gluing mechanism 8 is needed to complete the gluing of the solder strip groups welded on the two surfaces of the battery piece in sequence, thereby reducing the gluing cost. In addition, the length of the moving path of the battery piece transfer mechanism 7 is shortened, and the installation space of the battery piece welding device in the embodiments of the present application is saved.

[0111] The gluing mechanism 8 can be a screen printing glue mechanism, and the screen mesh arrangement of the screen printing glue mechanism is consistent with the preset glue point arrangement on the battery piece. The screen printing glue mechanism is used to implement the gluing of the solder strip groups welded on the two surfaces of the battery piece in a screen printing manner, which greatly improves the gluing efficiency. In addition, the gluing mechanism 8 can also be a dispensing mechanism, and the dispensing mechanism applies glue to the solder strip groups welded on the surface of the battery piece through a plurality of dispensing heads arranged in an array.

[0112] Optionally, a curing station and a gluing detection station are further arranged on the moving path of the battery piece transfer mechanism 7 after the gluing station. Correspondingly, the battery piece welding device in the embodiments of the present application further includes a curing mechanism 10 and a gluing detection mechanism 110, wherein the curing mechanism 10 is arranged at the curing station and is used to cure the glue applied on the first surface or the second surface of the battery piece. The gluing detection mechanism 110 is arranged at the gluing detection station, and the gluing detection mechanism 110 is used to detect the gluing quality of the first surface or the second surface of the battery piece.​​​​

[0113] The battery piece transferring mechanism 7, the gluing mechanism 8, the turnover mechanism 9, the curing mechanism 10 and the gluing detection mechanism 110 cooperate to implement the gluing, curing and gluing quality detection of the two surfaces of the battery piece, and the specific process is as follows:

[0114] The second conveying mechanism 6 places the battery piece after welding onto the battery piece transferring mechanism 7 which moves to the second feeding station H.

[0115] The battery piece transferring mechanism 7 sequentially transfers the battery piece to the gluing station K, the curing station and the detection station. When the battery piece reaches the gluing station K, the gluing mechanism 8 completes the gluing of the second group of welding ribbons welded on the first surface of the battery piece. When the battery piece reaches the curing station, the curing mechanism 10 cures the glue applied on the first surface of the battery piece. When the battery piece reaches the detection station, the gluing detection mechanism 110 completes the gluing quality detection of the first surface of the battery piece.

[0116] Subsequently, the battery piece transferring mechanism 7 transfers the battery piece back to the turnover mechanism 9, and the turnover mechanism 9 turns the battery piece on the battery piece transferring mechanism 7 by 180° so that the second surface of the battery piece faces upward.

[0117] Then, the battery piece transferring mechanism 7 again sequentially transfers the battery piece to the gluing station K, the curing station and the detection station. When the battery piece reaches the gluing station K, the gluing mechanism 8 completes the gluing of the first group of welding ribbons welded on the second surface of the battery piece. When the battery piece reaches the curing station, the curing mechanism 10 cures the glue applied on the second surface of the battery piece. When the battery piece reaches the detection station, the gluing detection mechanism 110 completes the gluing quality detection of the second surface of the battery piece.

[0118] By arranging the curing mechanism 10, the rapid curing of the glue applied on the surface of the battery piece is realized, thereby ensuring the working pace of each processing station in the subsequent process. By arranging the gluing detection mechanism 110, the automatic detection of the gluing quality of the battery piece is realized.

[0119] According to different process requirements, the glue applied to the surface of the battery piece can be UV glue, hot melt glue, etc. When the glue is UV glue, the curing mechanism 10 is a UV light box capable of emitting UV light, and the UV glue on the battery piece is cured after being irradiated by the UV light box. When the glue is hot melt glue, the curing mechanism 10 can be an infrared heating light box or a hot air heater, etc.

[0120] Optionally, the gluing detection mechanism 110 can be a PL detection mechanism or a CCD visual detection mechanism.

[0121] As shown in FIG. 7 and FIG. 9, optionally, the turnover mechanism 9 comprises a turnover part 91 and a taking and placing part 92, wherein: the turnover part 91 is used for sucking the battery piece with the first surface coated with the glue on the battery piece conveying mechanism 7, and turning over the battery piece by 180° so that the second surface of the battery piece faces upward; and the taking and placing part 92 is used for sucking the battery piece turned over from the turnover part 91, and placing the battery piece turned over back to the battery piece conveying mechanism 7.

[0122] As shown in FIG. 9, optionally, the turnover part 91 comprises a turnover driving module 911 and a turnover plate 912, wherein one end of the turnover plate 912 is connected to the driving end of the turnover driving module 911, and one surface of the turnover plate 912 is an adsorption surface. After the battery piece conveying mechanism 7 conveys the battery piece to the position of the turnover mechanism 9, the turnover driving module 911 drives the turnover plate 912 to turn over towards the battery piece conveying mechanism 7, so that the adsorption surface of the turnover plate 912 faces the battery piece, thereby adsorbing the battery piece. Subsequently, the turnover driving module 911 drives the turnover plate to turn over by 180° away from the battery piece conveying mechanism 7, so that the second surface of the battery piece faces upward.

[0123] Optionally, the taking and placing part 92 comprises a moving module 921 and an adsorption plate 922. After the turnover part 91 completes the turnover of the battery piece, the moving module 921 drives the adsorption plate 922 to move to the position above the battery piece, so that the adsorption plate 922 can adsorb the battery piece. Subsequently, the moving module 921 drives the adsorption plate 922 to move to the position above the battery piece conveying mechanism 7, the adsorption plate 922 releases the battery piece, and the battery piece is placed back to the battery piece conveying mechanism 7.

[0124] Optionally, the turnover plate 912 and the adsorption plate 922 are provided with suction cups or adsorption holes for adsorbing the battery piece.

[0125] During the process of taking and placing the battery piece by the taking and placing part 92, and during the process of turning over the battery piece by the turnover part 91, the position of the battery piece is inevitably deviated. As shown in FIG. 9, optionally, the battery piece welding device in the embodiment of the present application further comprises a regularizing mechanism 120 arranged oppositely on both sides of the moving path of the battery piece conveying mechanism 7. After the taking and placing part 92 places the battery piece turned over back to the battery piece conveying mechanism 7, the regularizing mechanism 120 is used for implementing the position correction of the battery piece turned over carried on the battery piece conveying mechanism 7.

[0126] The regularizing mechanism 120, for example, comprises a pair of regularizing plates or regularizing wheels arranged oppositely on both sides of the moving path of the battery piece conveying mechanism 7. When the battery piece is moved to the positions between the two regularizing plates or regularizing wheels under the driving of the battery piece conveying mechanism 7, the two regularizing plates or regularizing wheels move towards the middle, thereby implementing the position correction of the battery piece.

[0127] As shown in FIG. 9, the battery piece transfer mechanism 7 can alternatively include a first moving module 71 and a first carrying table 72, wherein the first carrying table 72 is connected to a moving part of the first moving module 71, the first carrying table 72 is used to carry and adsorb the battery piece, and the first moving module 71 is used to drive the first carrying table 72 to move back and forth.

[0128] The first moving module 71 can adopt various existing linear driving modules, such as a synchronous belt driving module composed of a motor, a synchronous pulley, a synchronous belt and a slide rail, or a linear module composed of a motor, a screw rod and a screw nut, etc., as long as it can drive the first carrying table 72 to move back and forth between different stations.

[0129] In another embodiment, the gluing station includes a first gluing station and a second gluing station arranged along the moving path of the battery piece transfer mechanism 7, and further, a turnover station is arranged between the first gluing station and the second gluing station. Correspondingly, the battery piece welding device in this embodiment further includes a turnover mechanism arranged at the turnover station, and the gluing mechanism 8 includes a first gluing part arranged at the first gluing station and a second gluing part arranged at the second gluing station.

[0130] After the second carrying mechanism 6 places the battery piece after welding onto the battery piece transfer mechanism 7 moving to the second feeding station, the battery piece transfer mechanism 7 moves to the first gluing station, the turnover station and the second gluing station in sequence. When the battery piece transfer mechanism 7 moves to the first gluing station, the first gluing part completes the gluing of the second welding ribbon group welded on the first surface of the battery piece. When the battery piece transfer mechanism 7 moves to the turnover station, the turnover mechanism turns over the battery piece on the battery piece transfer mechanism 7 by 180°, so that the second surface of the battery piece faces upward. When the battery piece transfer mechanism 7 moves to the second gluing station, the second gluing part completes the gluing of the first welding ribbon group welded on the second surface of the battery piece.

[0131] In this way, the battery piece transfer mechanism 7 does not need to turn back during the gluing process, it only needs to drive the battery piece to move in one direction for one stroke, and the gluing mechanism and the turnover mechanism can cooperate with each other to continuously complete the gluing operation on the first surface and the second surface of the battery piece, thereby improving the gluing efficiency of the battery piece.

[0132] Optionally, the first gluing part and the second gluing part have the same structure, and each can be a screen printing glue mechanism. The screen printing net plate of the screen printing glue mechanism has a mesh arrangement consistent with the arrangement of the preset glue points on the battery piece. The screen printing glue mechanism implements the gluing of the welding ribbon group on the two surfaces of the battery piece in a screen printing manner, which greatly improves the gluing efficiency. In addition, the first gluing part and the second gluing part can also be a dispensing mechanism, which applies glue to the welding ribbon group welded on the surface of the battery piece through a plurality of dispensing heads arranged in an array.

[0133] In order to realize rapid curing of the glue applied on the surface of the battery piece and automatic detection of the gluing quality of the battery piece, the first gluing station and the turnover station are sequentially provided with a first curing station and a first detection station, and the second gluing station is sequentially provided with a second curing station and a second detection station. Correspondingly, the first curing station is provided with a first curing mechanism, and the first detection station is provided with a first detection mechanism, wherein the first curing mechanism is used for curing the glue applied on the first surface of the battery piece, and the first detection mechanism is used for detecting the gluing quality of the first surface of the battery piece. Similarly, the second curing station is provided with a second curing mechanism, and the second detection station is provided with a second detection mechanism, wherein the second curing mechanism is used for curing the glue applied on the second surface of the battery piece, and the second detection mechanism is used for detecting the gluing quality of the second surface of the battery piece.

[0134] According to different process requirements, the glue applied on the surface of the battery piece can be UV glue, hot melt glue, etc. When the glue is UV glue, the first curing mechanism and the second curing mechanism are UV lamp boxes capable of emitting UV light, and the UV glue on the battery piece is cured after being irradiated by the UV lamp box. When the glue is hot melt glue, the first curing mechanism and the second curing mechanism can be infrared heating lamp boxes or hot air heaters, etc.

[0135] Optionally, the first detection mechanism and the second detection mechanism can be PL detection mechanisms or CCD visual detection mechanisms.

[0136] As shown in FIGS. 1-2, optionally, the battery piece supply mechanism 1 includes a conveying mechanism 11, a transfer mechanism 12 and a positioning mechanism 13, wherein: the conveying mechanism 11 is arranged on one side of the welding carrying mechanism 4, and is used for conveying a magazine containing battery pieces to the positioning mechanism 13. The transfer mechanism 12 is located between the conveying mechanism 11 and the positioning mechanism 13, and is used for picking up the battery pieces from the magazine and transferring the picked-up battery pieces to the positioning mechanism 13. The positioning mechanism 13 is configured to position the battery pieces to obtain position information of the battery pieces.

[0137] The first carrying mechanism 3 is used for picking up the battery pieces that have completed positioning from the positioning mechanism 13, and stacking the picked-up battery pieces on the first wire group according to the position information of the battery pieces, so as to realize accurate stacking of the battery pieces and finally ensure the position accuracy of each wire in the first wire group relative to the battery pieces.

[0138] The conveying mechanism 11 can be various existing linear conveying mechanisms such as a belt conveying mechanism and a roller conveying mechanism. The transfer mechanism 12 can be a suction disc group driven by a robot arm or an XZ module, for example.

[0139] As shown in FIG. 2, optionally, the positioning mechanism 13 comprises a positioning platform 131 and a positioning camera 132 arranged above the positioning platform 131, wherein the positioning platform 131 is configured to carry the battery piece transferred by the transfer mechanism 12, and the positioning camera 132 is configured to implement the photographic positioning of the battery piece on the positioning platform 131.

[0140] Optionally, the positioning camera 132 is connected with the PLC controller, and after the positioning camera 132 takes a photo of the battery piece on the positioning platform 131, the positioning camera 132 sends the image of the battery piece to the PLC controller, and the PLC controller implements the positioning of the battery piece by implementing image analysis (such as gray value analysis) on the image.

[0141] As shown in FIG. 1, optionally, the battery piece welding device in the embodiment of the present application further comprises a second carrying table 130, and the second carrying table 130 is configured to carry the tooling. The first carrying mechanism 3 is further configured to pick up the tooling from the second carrying table 130 and place the tooling on the second welding ribbon group at the first feeding station, so as to compress the second welding ribbon group to the battery piece.

[0142] The second carrying table 130 realizes the supply of the tooling, so that the first carrying mechanism 3 can pick up the tooling and place the tooling on the second welding ribbon group at the first feeding station, thereby ensuring that the second welding ribbon group can be compressed on the upper surface of the battery piece, and preventing the second welding ribbon group from deviating from the battery piece when the welding carrying mechanism 4 moves.

[0143] As shown in FIG. 1 and FIG. 8, optionally, the battery piece welding device in the embodiment of the present application further comprises a third carrying mechanism 150 and a second moving module 140, wherein: a tooling unloading station is further arranged between the welding station and the first unloading station on the moving path of the welding carrying mechanism 4. The second carrying table 130 is arranged on one side of the welding carrying mechanism 4 and is installed on the driving end of the second moving module 140, and the second moving module 140 is configured to drive the second carrying table 130 to reciprocate and translate along the first horizontal direction. The first carrying mechanism 3 is configured to pick up the tooling from the second carrying table 130 moved to the side of the first feeding station. The third carrying mechanism 150 is arranged at the tooling unloading station, and the third carrying mechanism 150 is configured to remove the tooling from the welding carrying mechanism 4 when the welding carrying mechanism moves from the welding station to the tooling unloading station, and place the removed tooling 4 on the second carrying table 130 moved to the side of the tooling unloading station. After receiving the tooling placed back by the third carrying mechanism 150, the second carrying table 130 returns to the side of the first feeding station for next use.

[0144] It can be seen that by controlling the second carrying table 130 to reciprocate and move between the side of the first feeding station and the side of the tooling unloading station, the buffering and recycling of the tooling are realized.

[0145] The second moving module 140 can adopt various types of linear modules, such as a linear module composed of a motor, a screw rod, a screw nut, etc., as long as it can drive the second carrying table 130 to reciprocate and translate between different stations. The third carrying mechanism 150 can be, for example, a magnetic suction assembly or a suction disc assembly driven by a robot arm.

[0146] Optionally, the second carrying table 130 is provided with a heating member, which is used to implement preheating of the tooling cached on the tooling cache table 8. After the preheated tooling is pressed and placed on the second solder strip group, heating of the second solder strip group and the battery sheet can be implemented, thereby shortening the welding time of the welding mechanism 5 and improving the welding efficiency.

[0147] As shown in FIG. 8, optionally, the battery sheet welding device in the embodiment of the application includes a tooling regularizing portion 160 arranged on the moving path of the second carrying table 130, which is used to implement position correction of the tooling placed back on the second carrying table 130 by the third carrying mechanism, so as to ensure that the first carrying mechanism 3 can successfully pick up the tooling from the second carrying table 130 after the second carrying table 130 returns to the first feeding station, and ensure that the tooling is accurately pressed and placed on the second solder strip group.

[0148] As shown in FIG. 10, optionally, the first carrying mechanism 3 includes a driving portion 31, a first picking portion 32 and a second picking portion 33, wherein the first picking portion 32 and the second picking portion 33 are both mounted on the driving end of the driving portion 31. The driving portion 31 is used to drive the first picking portion 32 to pick up the battery sheet from the battery sheet supply mechanism 1 and stack the picked battery sheet on the first solder strip group. The driving portion 31 is also used to drive the second picking portion 32 to pick up the tooling from the second carrying table 130 and press and place the picked tooling on the second solder strip group.

[0149] Optionally, the first picking portion 32 includes a plurality of suction discs, which pick up the battery sheet by suction force; and the second picking portion 33 includes a plurality of magnets, which pick up the tooling by magnetic attraction.

[0150] Optionally, the welding carrying mechanism 4 includes a third moving module and a third carrying table, wherein the third carrying table is connected to the moving component of the third moving module, the third carrying table is provided with a suction hole for attracting the battery sheet, the first solder strip group, the battery sheet and the second solder strip group are carried on the third carrying table, and the third moving module is used to drive the third carrying table to reciprocate. The battery sheet stacked on the first solder strip group is attracted by the suction hole, so as to ensure that the first solder strip group can be tightly attached to the lower surface of the battery sheet, and prevent the first solder strip group from deviating from the battery sheet when the welding carrying mechanism 4 moves.

[0151] The third moving module can adopt various types of linear modules, such as a linear module composed of a motor, a screw rod and a screw nut, etc., as long as it can drive the third supporting table to reciprocate and translate between different stations.

[0152] As shown in FIGS. 1 and 2, the solder strip laying mechanism 2 includes a solder strip feeding part 21, a solder strip pulling part 22, a flux coating part 23, a solder strip pressing part 24 and a solder strip cutting part 25. The solder strip feeding part 21 is configured to provide a plurality of solder strips. The solder strip pulling part 22 is configured to clamp the end of the solder strip and pull the solder strip so that the solder strip passes through the flux coating part 23, the solder strip pressing part 24 and the solder strip cutting part 25 in sequence. The flux coating part 23 is configured to coat flux on the solder strip. The solder strip pressing part 24 is configured to press the solder strip, and the solder strip cutting part 25 is configured to cut the pressed solder strip to obtain a first solder strip group or a second solder strip group. The solder strip pulling part 22 is also used to lay the first solder strip group on the solder carrying mechanism 4 or to stack the second solder strip group on the battery sheet.

[0153] As can be seen, through the cooperation of the solder strip feeding part 21, the solder strip pulling part 22, the flux coating part 23, the solder strip pressing part 24 and the solder strip cutting part 25, the solder strip laying mechanism 2 realizes the automatic preparation of the first solder strip group and the second solder strip group and realizes the automatic laying of the first solder strip group and the second solder strip group.

[0154] In some repair application examples, in order to reduce the fragment rate of the battery string in the later lamination process, the solder strip segment between adjacent battery sheets in the battery string to be repaired is a flat solder strip segment. The solder strip on the defective battery sheet cut off in such a battery string can have a flat solder strip segment, so the solder strip on the replacement battery sheet used to replace the defective battery sheet also needs to be flattened.

[0155] Therefore, when the solder strip discharged by the solder strip feeding part 21 is a circular solder strip with a circular cross section, the solder strip laying mechanism 2 further includes a solder strip flattening part between the solder strip pressing part 24 and the solder strip cutting part 25. The solder strip flattening part is used to extrude the solder strip segment with a predetermined length on the solder strip into a flat solder strip segment before the solder strip cutting part 25 cuts the solder strip.

[0156] As shown in FIGS. 1 to 4, the battery sheet welding device in the embodiments of the present application further includes a battery sheet collecting mechanism 170, which is arranged on the moving path of the battery sheet transferring mechanism 7 and located at the rear of the gluing mechanism 8. The battery sheet collecting mechanism 170 includes a lifting part 171, a docking conveying part 172 and a basket conveying part 173.

[0157] The basket conveying part 173 is arranged at the output end of the battery sheet transferring mechanism 7. The docking conveying part 172 is connected to the movable part of the lifting part 171.

[0158] The lifting part 171 is configured to drive the docking conveying part 172 to descend to the basket changing station, so that the docking conveying part 172 is docked with the basket conveying part 173.

[0159] The basket conveying part 173 is used to convey an empty basket to the docking conveying part 172 or receive a full basket full of battery pieces output by the docking conveying part 172.

[0160] The lifting part 171 is also configured to drive the docking conveying part 172 to ascend to the piece collecting station, and the battery piece transferring mechanism 7 is also used to extend into the empty basket on the docking conveying part 172 and insert the battery pieces into the slots of the empty basket. The lifting part 171 is also configured to drive the docking conveying part 171 to ascend or descend, so that the battery piece transferring mechanism 7 inserts the battery pieces into the remaining slots of the empty basket one by one.

[0161] Optionally, the basket comprises a bottom plate and first and second side plates oppositely arranged on the bottom plate, and horizontal slots are arranged on the opposite inner walls of the first and second side plates one by one in the vertical direction. Each pair of slots can insert and place one battery piece.

[0162] The optional working process of the battery piece collecting mechanism 170 in the embodiment is as follows:

[0163] Firstly, the lifting part 171 drives the docking conveying part 172 to descend to the basket changing station and dock with the basket conveying part 173. The basket conveying part 173 conveys an empty basket to the docking conveying part 172.

[0164] Then, the lifting part 171 drives the docking conveying part 172 to ascend to the piece collecting station. The battery piece transferring mechanism 7 extends into the top space of the empty basket on the docking conveying part 172.

[0165] The battery piece transferring mechanism 7 inserts the battery pieces into the basket one by one. Specifically, whenever a battery piece is inserted into one slot in the basket, the lifting part 171 drives the docking conveying part 172 to ascend by a predetermined height (such as the spacing between adjacent two slots), so that the output end of the battery piece transferring mechanism 7 is aligned with the next slot of the basket, and finally ensures that the battery pieces output by the battery piece transferring mechanism 7 can be inserted into the basket one by one, until all the slots in the basket are filled with battery pieces.

[0166] When the basket is full of battery pieces, the battery piece transferring mechanism 7 withdraws from the basket to implement lifting avoidance of the basket. The lifting part 171 drives the docking conveying part 172 to descend to the basket changing station, so that the docking conveying part 172 is docked with the basket conveying part 173 again.

[0167] Then, the docking conveying part 172 conveys the full basket of battery pieces to the basket conveying part 173, and receives an empty basket from the basket conveying part 173.

[0168] It can be seen that, through the cooperation of the lifting part 171, the docking conveying part 172 and the basket conveying part 173, the battery piece collecting mechanism 170 can sequentially stack the battery pieces output by the battery piece conveying mechanism 7 into the basket, and automatically realize the basket changing operation, so as to improve the collecting efficiency.

[0169] As described above, the battery piece conveying mechanism 7 in the embodiment shown in FIG. 9 comprises a first moving module 71 and a first bearing table 72, wherein the first bearing table 72 is connected to the moving part of the first moving module 71, the first bearing table 72 is used for bearing and adsorbing the battery pieces, and the first moving module 71 is used for driving the first bearing table 72 to move back and forth, so as to switch the first bearing table 72 between different stations. In order to enable the first bearing table 72 to be inserted into the basket, optionally, the battery piece conveying mechanism 7 further comprises a telescopic driving part 73, and the first bearing table 72 is connected to the driving end of the first moving module 71 through the telescopic driving part 73. When the output end of the battery piece conveying mechanism 7 is aligned with a slot of the basket, the telescopic driving part 73 can drive the first bearing table 72 to be inserted into the basket.

[0170] Optionally, the basket conveying part 173 comprises an upper basket conveying part 1731 and a lower basket conveying part 1732 arranged side by side at the same height. The battery piece collecting mechanism 170 further comprises a translation driving part, and the lifting part 171 is connected to the moving part of the translation driving part. The translation driving part is used for driving the docking conveying part 172 at the basket changing station to translate, so as to dock the docking conveying part 172 with the upper basket conveying part 1731 or the lower basket conveying part 1732. When the docking conveying part 172 is docked with the upper basket conveying part 1731, the upper basket conveying part 1731 conveys the empty basket to the docking conveying part 172. When the docking conveying part 172 is docked with the lower basket conveying part 1732, the docking conveying part 172 conveys the full basket of battery pieces on it to the lower basket conveying part 1732, and the full basket is conveyed to the basket unloading station of the next station by the lower basket conveying part 1732.

[0171] As shown in FIGS. 1 to 7, optionally, the battery piece welding device in the embodiment of the application further comprises a detection mechanism 180 and an NG basket 190. The detection mechanism 180 and the NG basket 190 are arranged on the moving path of the second conveying mechanism 6.

[0172] Optionally, the cell piece transferring mechanism 7 is also used to transfer the cell piece after the gluing to the second feeding station H, and the second conveying mechanism 6 is also used to take the cell piece after the gluing from the cell piece transferring mechanism 7 and transfer it to the detection mechanism 180. The detection mechanism 180 is used to detect the quality of the cell piece.

[0173] After the quality detection of the cell piece, if the cell piece is a qualified cell piece, the second conveying mechanism 6 re-conveys it to the cell piece transferring mechanism 7 at the second feeding station H, and the cell piece transferring mechanism 7 transfers the qualified cell piece to the cell piece collecting mechanism 170. If the cell piece is an unqualified cell piece, the second conveying mechanism 6 conveys it to the NG box.

[0174] It can be seen that, by arranging the detection mechanism 180 and the cell piece collecting mechanism 170, the detection of the cell piece after the gluing is realized, and it is ensured that the cell piece collected to the cell piece collecting mechanism 170 is a qualified cell piece. The qualified cell piece collected to the cell piece collecting mechanism can be used by multiple cell string repair machines in the subsequent process.

[0175] It should be noted that the cell piece welding device in the embodiment of the present application can also only implement the welding of the cell piece, i.e., only the first and second welding rib groups are welded to the cell piece, and the gluing operation of the cell piece is not needed. In this case, the second conveying mechanism 6 directly transfers the cell piece to the detection mechanism 180 after picking up the cell piece after the welding of the welding rib from the welding carrying mechanism 4.

[0176] After the detection of the cell piece by the detection mechanism 180, if the cell piece is a qualified cell piece, the second conveying mechanism 6 conveys it to the cell piece transferring mechanism 7 at the second feeding station H, and the cell piece transferring mechanism 7 transfers and stores the qualified cell piece to the cell piece collecting mechanism 170. During the transferring process, the gluing mechanism 8 does not perform the gluing operation. If the cell piece is an unqualified cell piece, the second conveying mechanism 6 conveys it to the NG box 190.

[0177] Since the temperature of the cell piece after the welding of the welding rib group is very high, the cell piece is easily stuck to the suction part (such as a suction disc) of the second conveying mechanism 6, and thus the second conveying mechanism 6 is difficult to directly release the cell piece to the NG box 190. In order to solve this problem, as shown in FIG. 1, the cell piece welding device in the embodiment of the present application also includes a suction mechanism 200 arranged above the NG box 190, and the suction mechanism 200 includes a rotary driving part and a suction part. The suction part is installed on the driving end of the rotary driving part, and the rotary driving part is used to drive the suction part to rotate vertically.

[0178] When the suction part rotates to the state that the suction surface faces upward, the battery piece that is detected as unqualified is sucked and held on the second conveying mechanism 6, so that the unqualified battery piece is smoothly separated from the second conveying mechanism 6. When the suction part rotates to the state that the suction surface faces downward, the sucked battery piece is released into the NG box 190.

[0179] Optionally, the detection mechanism 180 comprises at least one of an EL detection part and an appearance detection part, wherein the EL detection part is configured to implement EL detection on the battery piece, and the appearance detection part is configured to implement appearance detection on the battery piece. In this way, the detection mechanism 180 can realize the detection of virtual welding, internal defects and appearance defects of the battery piece after the welding of the welding ribbons is completed.

[0180] Optionally, the EL detection part comprises an EL energizing assembly and an infrared camera. The EL energizing assembly is configured to energize the battery piece through the first welding ribbon group and the second welding ribbon group. The infrared camera is configured to acquire an infrared image of the battery piece in the energized state. The virtual welding and internal defect detection on the battery piece can be completed by implementing image analysis on the infrared image. The appearance detection part can be various visible light imaging cameras. The visible light imaging cameras are configured to take photos of the battery piece in the non-energized state to obtain appearance images of the battery piece. The appearance detection on the battery piece can be completed by implementing image analysis on the appearance images of the battery piece. Optionally, the infrared camera and the visible light imaging camera respectively send the acquired infrared image and appearance image of the battery piece to the PLC. The PLC executes the image recognition algorithm stored therein to implement the virtual welding, internal defect detection and appearance detection on the battery piece.

[0181] The application further provides a battery piece welding method, which comprises the following steps:

[0182] The welding ribbon groups are respectively laid on the lower surface and the upper surface of the single battery piece.

[0183] The battery piece on which the welding ribbon groups are laid is heated, so that the welding ribbon groups are welded to the battery piece.

[0184] The glue points are applied to the welding ribbon groups on the two surfaces of the welded battery piece, and the glue points are solidified to bond the welding ribbon groups to the battery piece.

[0185] The battery piece welding method of the application can automatically weld the welding ribbon groups to the two surfaces of the battery piece and automatically apply glue to the welding ribbon groups welded to the two surfaces of the battery piece, thereby realizing the automatic preparation of the replacement battery piece required for the repair of the battery string without the main grid. The application improves the preparation efficiency of the replacement battery piece.

[0186] The battery piece welding method of the application can be implemented by the battery piece welding device in any of the above embodiments. The more detailed implementation process can be referred to the related description in the foregoing description, which will not be described here again.

[0187] A sufficiently detailed description of the present application has been given above with a certain particularity. One skilled 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 application should belong to the protection scope of the present application. The scope of protection claimed by the present application is defined by the claims described, not by the above description in the embodiments.

Claims

1. A cell tab welding apparatus, characterized by, The battery piece welding device comprises a battery piece supply mechanism, a welding strip laying mechanism, a first carrying mechanism, a welding carrying mechanism, a welding mechanism, a second carrying mechanism, a battery piece transferring mechanism and a gluing mechanism, wherein: The welding carrying mechanism is configured to reciprocate in a first horizontal direction, and a first feeding station, a welding station and a first discharging station are sequentially arranged on the moving path of the welding carrying mechanism; The welding strip laying mechanism is used for laying a first welding strip group on the welding carrying mechanism at the first feeding station; the first carrying mechanism is used for picking up a battery piece from the battery piece supply mechanism and stacking the picked-up battery piece on the first welding strip group; and the welding strip laying mechanism is further used for stacking a second welding strip group on the battery piece; The welding mechanism is arranged at the welding station, and is used for welding the first welding strip group and the second welding strip group on the battery piece when the welding carrying mechanism moves to the welding station; The second carrying mechanism is arranged at the first discharging station, and is used for picking up the battery piece with completed welding from the welding carrying mechanism when the welding carrying mechanism moves to the first discharging station; The battery piece transferring mechanism is configured to reciprocate in a second horizontal direction, and a second feeding station and a gluing station are sequentially arranged on the moving path of the battery piece transferring mechanism, wherein the second horizontal direction is parallel to or intersects with the first horizontal direction; The second carrying mechanism is further used for placing the picked-up battery piece with completed welding on the battery piece transferring mechanism at the second feeding station; The gluing mechanism is arranged at the gluing station, and is used for gluing the battery piece when the battery piece transferring mechanism moves to the gluing station, so that the first welding strip group and the second welding strip group are bonded to the battery piece.

2. The cell welding apparatus of claim 1, wherein, The battery piece welding device further comprises a turnover mechanism arranged on the moving path of the battery piece transferring mechanism, and the turnover mechanism is arranged before the gluing mechanism; The battery piece transferring mechanism is used for transferring the battery piece with completed welding to the gluing station, and the gluing mechanism is used for gluing the second welding strip group welded to the first surface of the battery piece; The battery piece transferring mechanism is further used for transferring the battery piece with completed first surface gluing back to the turnover mechanism, and the turnover mechanism is used for turning over the battery piece with completed first surface gluing on the battery piece transferring mechanism by 180º, so that the second surface of the battery piece faces upward; The battery piece transferring mechanism is further used for transferring the battery piece after turning over to the gluing station again, and the gluing mechanism is used for gluing the first welding strip group welded to the second surface of the battery piece.

3. The cell welding apparatus of claim 2, wherein The moving path of the battery piece transferring mechanism further comprises a curing station and a gluing detection station after the gluing station, and the battery piece welding device further comprises a curing mechanism and a gluing detection mechanism. The solidifying mechanism is arranged in the solidifying station and is used for solidifying the glue applied on the first surface or the second surface of the battery piece; and the glue application detection mechanism is arranged in the glue application detection station and is used for detecting the glue application quality of the first surface or the second surface of the battery piece.

4. The cell welding apparatus of claim 2, wherein The turnover mechanism comprises a turnover part and a pick-and-place part, wherein: The turnover part is used for sucking the battery piece with the first surface glued and turning over the battery piece with the first surface glued by 180° so that the second surface of the battery piece faces upward; The pick-and-place part is used for sucking the battery piece after the turnover from the turnover part and placing the battery piece after the turnover back to the battery piece conveying mechanism.

5. The cell welding apparatus of claim 4, wherein the welding head is configured to move the welding tip in a direction that is substantially parallel to the plane of the cell. The battery piece welding device further comprises a shaping mechanism arranged on both sides of the moving path of the battery piece conveying mechanism, and after the pick-and-place part places the battery piece after the turnover back to the battery piece conveying mechanism, the shaping mechanism is used for correcting the position of the battery piece after the turnover carried on the battery piece conveying mechanism.

6. The cell welding apparatus of claim 2, wherein the welding head is configured to weld the cell in a plurality of passes. The battery piece conveying mechanism comprises a first moving module and a first carrying table, wherein the first carrying table is connected to the moving part of the first moving module, the first carrying table is used for carrying and sucking the battery piece, and the first moving module is used for driving the first carrying table to move back and forth.

7. The cell welding apparatus of claim 1, wherein The glue application station comprises a first glue application station and a second glue application station arranged along the moving path of the battery piece conveying mechanism, and a turnover station is further arranged between the first glue application station and the second glue application station; The battery piece welding device further comprises a turnover mechanism arranged in the turnover station; The glue application mechanism comprises a first glue application part arranged in the first glue application station and a second glue application part arranged in the second glue application station; The battery piece conveying mechanism is used for conveying the battery piece to the first glue application station, the first glue application part is used for applying glue to the second group of welding ribbons welded to the first surface of the battery piece; The battery piece conveying mechanism is further used for conveying the battery piece with the first surface glued to the turnover station, and the turnover mechanism is used for turning over the battery piece with the first surface glued on the battery piece conveying mechanism by 180° so that the second surface of the battery piece faces upward; The battery piece conveying mechanism is further used for conveying the battery piece after the turnover to the second glue application station, and the second glue application part is used for applying glue to the first group of welding ribbons welded to the second surface of the battery piece.

8. The cell welding apparatus of claim 1, wherein, The battery piece supply mechanism comprises a conveying mechanism, a transfer mechanism and a positioning mechanism, wherein: The conveying mechanism is arranged on one side of the welding carrying mechanism and is used for conveying the magazine loaded with the battery piece to the positioning mechanism; The transfer mechanism is located between the conveying mechanism and the positioning mechanism, and is used for picking up the battery piece from the magazine and transferring the picked battery piece to the positioning mechanism; The positioning mechanism is configured to position the battery piece to obtain the position information of the battery piece; and The battery piece conveying mechanism is used for conveying the battery piece to the first glue application station, the first glue application part is used for applying glue to the second group of welding ribbons welded to the first surface of the battery piece, the battery piece conveying mechanism is further used for conveying the battery piece with the first surface glued to the turnover station, the turnover mechanism is used for turning over the battery piece with the first surface glued on the battery piece conveying mechanism by 180° so that the second surface of the battery piece faces upward, the battery piece conveying mechanism is further used for conveying the battery piece after the turnover to the second glue application station, and the second glue application part is used for applying glue to the first group of welding ribbons welded to the second surface of the battery piece. The first carrying mechanism is used for picking up the completed positioning battery piece from the positioning mechanism, and stacking the picked battery piece on the first solder strip group according to the position information of the battery piece.

9. The replacement battery sheet preparation apparatus of claim 1, wherein: The battery piece welding device further comprises a second bearing table, and the second bearing table is used for bearing a tooling; The first carrying mechanism is further used for picking up the tooling from the second bearing table and placing it on the second solder strip group at the first feeding station to press the second solder strip group to the battery piece.

10. The cell welding apparatus of claim 9, wherein the welding head is configured to weld the cell in a plurality of passes. The battery piece welding device further comprises a third carrying mechanism and a second moving module, wherein: A tooling unloading station is further arranged between the welding station and the first unloading station on the moving path of the welding bearing mechanism; The second bearing table is arranged on one side of the welding bearing mechanism and is mounted on the driving end of the second moving module, and the second moving module is used for driving the second bearing table to reciprocatingly translate along the first horizontal direction; The first carrying mechanism is used for picking up tooling from the second bearing table moved to the side of the first feeding station; The third carrying mechanism is arranged at the tooling unloading station, and the third carrying mechanism is used for removing tooling from the welding bearing mechanism when the welding bearing mechanism is moved from the welding station to the tooling unloading station, and placing the removed tooling back on the second bearing table moved to the side of the tooling unloading station; After receiving the tooling placed back by the third carrying mechanism, the second bearing table returns to the side of the first feeding station.

11. The cell welding apparatus of claim 9, wherein the welding head is configured to weld the cell in a plurality of passes. The second bearing table is provided with a heating member, and the heating member is used for preheating the tooling carried on the tooling buffer table.

12. The cell welding apparatus of claim 10, wherein the welding head is configured to weld the cell in a plurality of passes. The battery piece welding device comprises a tooling shaping part arranged on the moving path of the second bearing table, and the tooling shaping part is used for implementing position correction of the tooling placed back on the second bearing table by the third carrying mechanism.

13. The cell welding apparatus of claim 9, wherein the welding head is configured to weld the cell in a plurality of passes. The first carrying mechanism comprises a driving part, a first picking part and a second picking part, wherein: The first picking part and the second picking part are both mounted on the driving end of the driving part; The driving part is used for driving the first picking part to pick up a battery piece from the battery piece supply mechanism and stack the picked battery piece on the first solder strip group; The driving part is further used for driving the second picking part to pick up tooling from the second bearing table, and for driving the second picking part to press and place the picked tooling on the second solder strip group.

14. The cell welding apparatus of claim 1, wherein, The welding bearing mechanism comprises a third moving module and a third bearing table, wherein the third bearing table is connected to the moving part of the third moving module, the third bearing table is provided with an adsorption hole for adsorbing a battery piece, the first solder strip group, the battery piece and the second solder strip group are carried on the third bearing table, and the third moving module is used for driving the third bearing table to reciprocatingly move.

15. The cell welding apparatus of claim 1, wherein, The solder strip laying mechanism comprises a solder strip feeding part, a solder strip traction part, a flux coating part, a solder strip pressing part and a solder strip cutting part, wherein: The solder strip feeding part is configured to provide a plurality of solder strips; The solder strip traction part is configured to clamp the end of the solder strip and pull the solder strip so that the solder strip passes through the flux coating part, the solder strip pressing part and the solder strip cutting part in sequence; The flux coating part is configured to coat flux on the solder strip; The solder strip pressing part is configured to press the solder strip, and the solder strip cutting part is configured to cut the pressed solder strip to obtain the first solder strip group or the second solder strip group; The solder strip traction part is further used to lay the first solder strip group on the solder carrying mechanism or stack the second solder strip group on the battery piece.

16. The cell welding apparatus of claim 1, wherein, The battery piece welding device further comprises a battery piece receiving mechanism, which is arranged on the moving path of the battery piece transferring mechanism and located behind the gluing mechanism; The battery piece receiving mechanism comprises a lifting part, a docking conveying part and a basket conveying part, wherein: The basket conveying part is arranged at the output end of the battery piece transferring mechanism; The docking conveying part is connected to the movable part of the lifting part; The lifting part is configured to drive the docking conveying part to descend to a basket changing station so that the docking conveying part is docked with the basket conveying part; the basket conveying part is used to convey an empty basket to the docking conveying part or receive a full basket full of battery pieces output by the docking conveying part; The lifting part is further configured to drive the docking conveying part to ascend to a piece receiving station, and the battery piece transferring mechanism is further used to extend into an empty basket on the docking conveying part and insert a battery piece into a slot of the empty basket; the lifting part is further configured to drive the docking conveying part to ascend or descend so that the battery piece transferring mechanism inserts battery pieces into the remaining slots of the empty basket in sequence.

17. The cell welding apparatus of claim 16, wherein the welding head is configured to weld the cell in a plurality of passes. The battery piece welding device further comprises a detection mechanism and an NG basket; The detection mechanism and the NG basket are arranged on the moving path of the second conveying mechanism; The battery piece transferring mechanism is further used to transfer the battery piece after gluing back to the second feeding station, and the second conveying mechanism is further used to take the battery piece after gluing away from the battery piece transferring mechanism and transfer it to the detection mechanism; The detection mechanism is used for quality detection of the battery piece; The second conveying mechanism is further used to convey the battery piece after detection to the battery piece transferring mechanism at the second feeding station, and convey the battery piece after detection to the NG basket; The battery piece transferring mechanism is further used to transfer the battery piece after detection to the battery piece receiving mechanism.

18. The cell welding apparatus of claim 17, wherein the welding head is configured to weld the cell in a plurality of passes. The battery piece welding device further comprises a suction mechanism arranged above the NG basket, the suction mechanism comprises a rotary driving part and a suction part, the suction part is mounted on the driving end of the rotary driving part, and the rotary driving part is used to drive the suction part to rotate vertically; when the suction part rotates to the adsorption surface upward, the battery piece after detection on the second conveying mechanism is adsorbed, and when the suction part rotates to the adsorption surface downward, the battery piece after detection is released into the NG basket.

19. The cell welding apparatus of claim 17, wherein the welding head is configured to weld the cell in a plurality of passes. The detection mechanism comprises at least one of an EL detection part and an appearance detection part, wherein the EL detection part is used to implement EL detection of the battery piece, and the appearance detection part is used to implement appearance detection of the battery piece.

20. A method of soldering a battery cell, the method comprising: The battery piece welding method comprises: a welding strip group is laid on the lower surface and the upper surface of the single battery piece respectively; the battery piece on which the welding strip group is laid is heated, so that the welding strip group is welded with the battery piece; a glue point is applied to the welding strip group on the two surfaces of the welded battery piece, and the glue point is solidified to bond the welding strip group with the battery piece.

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