Battery piece series connection machine and correction piece, correction assembly and pickup device thereof

Abstract

The embodiment of the utility model discloses a battery piece series connection machine and a correction piece, a correction assembly and a pickup device thereof. Wherein the correcting piece comprises a correcting support, a pressing block and two sets of lifting structures, and the pressing block and the lifting structures are both installed on the correcting support; the downward side of the pressing block is provided with an arc-shaped part used for being attached to one battery piece in the battery string, the arc-shaped part is used for applying pressure in the first direction to the middle position of the battery piece, and the two sets of lifting structures are symmetrically arranged on the two sides of the arc-shaped part and used for providing acting force in the direction opposite to the first direction for the battery piece. According to the embodiment of the invention, the method can achieve the linear contact between the arc-shaped part and the battery piece with the protruding deformation at the middle position, and starts to extrude the protruding position in the first direction. In the whole process, the battery piece can be fixed in place, it is guaranteed that the correction work is smoothly carried out, meanwhile, only the middle position where the protrusion is formed can be extruded, and the probability that the battery piece is damaged by the correction work is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a battery string welding machine, a correction piece, a correction assembly and a picking device thereof. Background Art

[0002] For an IBC cell (interdigitated back contact cell), only the back surface is the welding surface, and its electrodes are all located on this welding surface. After the IBC cells are welded into a string by welding tapes, the welding tapes are all welded on the welding surface of the cells.

[0003] During the welding process, the welding tape needs to be heated to melt the solder layer on the surface of the welding tape. After the welding is completed, the welding tape will gradually cool and shrink, thereby causing a pull on the cell towards the welding surface, making it easy for the middle position of the cell to warp and deform. In order to correct the deformation of the cell, the prior art often uses a pressing block with a correction plane to squeeze the cell, but this method of correcting the cell using an entire planar structure is extremely likely to damage the cell during the correction process, thereby leading to the scrapping of the entire string. Summary of the Utility Model

[0004] This application aims to at least solve one of the technical problems existing in the prior art. For this reason, this application proposes a battery string welding machine, a correction piece, a correction assembly and a picking device thereof to solve the problem that the cell is easily damaged during the correction process.

[0005] In a first aspect, this application provides a correction piece, which includes a correction bracket, a pressing block and two groups of lifting structures. The pressing block and the lifting structures are both installed on the correction bracket;

[0006] The downward-facing surface of the pressing block is provided with an arc portion for fitting with one cell in the battery string. The arc portion is used to apply pressure in a first direction to the middle position of the cell, and the two groups of lifting structures are symmetrically arranged on both sides of the arc portion and are used to provide a force for the cell in a direction opposite to the first direction.

[0007] Based on the above correction piece, through the cooperation of the pressing block with the arc portion and the lifting structures, it is possible to first achieve line contact between the arc portion and the cell with a convex deformation at the middle position, and start to squeeze the convex position in the first direction (perpendicular to the cell and towards the cell), and use the lifting structures to ensure that both sides of the convex position are fixed by the correction piece, or the lifting structures can be used to apply a pulling force in a direction opposite to the first direction to the positions on both sides of the convex position to improve the correction efficiency; throughout the process, the cell can be fixed in place to ensure the smooth progress of the correction work, and at the same time, only the middle position with the convexity is squeezed, reducing the probability of the cell being damaged during the correction work.

[0008] In one embodiment of the above-mentioned correction member, the rotation axis of the arc portion extends in the second direction, and the second direction is perpendicular to the extending direction of the battery string.

[0009] In one embodiment of the above-mentioned correction member, cooling grooves for cooling the battery string are arranged on the arc surface of the arc portion. The cooling grooves are connected to a gas source, and openings facing the battery string are provided on the cooling grooves.

[0010] Furthermore, based on the cooling grooves, the cooling grooves can form gas flow channels. Through the air extraction or exhaust action of the gas source, the gas can flow through the cooling grooves quickly. Furthermore, through the arrangement of the cooling grooves, the welding tapes and battery cells on the battery string can be cooled and the temperature can be reduced, so as to prevent the welding tapes from continuing to shrink and cause the battery cells to arch up again after the battery string is corrected.

[0011] In one embodiment of the above-mentioned correction member, the number of the cooling grooves is multiple, and they correspond to the positions of the welding tapes on the battery string one by one.

[0012] In one embodiment of the above-mentioned correction member, the pressing block is slidably arranged on the correction bracket through a guiding shaft extending in the first direction, and an elastic member for providing an elastic force in the first direction for the pressing block is arranged between the pressing block and the correction bracket.

[0013] In one embodiment of the above-mentioned correction member, each set of lifting structures includes a plurality of suction cups arranged in the second direction and connected to the gas source. The suction cups are used to continuously provide an adsorption force in the direction opposite to the first direction for the corresponding battery cells during the stage of picking up the battery string.

[0014] In one embodiment of the above-mentioned correction member, mounting holes extending in the first direction and corresponding to the suction cups one by one are provided on the pressing block, and the suction cups act on the battery cells through the corresponding mounting holes.

[0015] Furthermore, based on the mounting holes, the circumferential side surface of the suction cup can be limited and fixed through the mounting holes, reducing the negative impact caused by the vibration generated by the suction cup during operation, and making the adsorption and fixing effect of the suction cup on the battery cell better.

[0016] In a second aspect, the present application provides a correction assembly, including a mounting beam and a plurality of correction members as above. The plurality of correction members are arranged on the mounting beam in sequence along the extending direction of the battery string. The plurality of correction members are arranged corresponding to a plurality of battery cells in the battery string one by one in the first direction. Each correction member is used to provide a pressure in the first direction for the corresponding battery cell. The plurality of correction members move synchronously in the first direction through the mounting beam to simultaneously complete the correction work of all battery cells in the battery string.

[0017] Based on the above-mentioned correction assembly, the correction work of multiple battery cells or an entire battery string can be completed simultaneously, improving the production efficiency.

[0018] Further, a driving member is provided on the correction bracket or the mounting beam. The driving member includes a motor, and the driving end of the motor is connected to the pressing block. The motor is configured to drive the pressing block to move along the first direction or the opposite direction of the first direction.

[0019] By providing the driving member, the pressing block can actively and repeatedly press down to correct the battery string and obtain a better correction effect.

[0020] Further, the driving member further includes a lead screw, a lead screw nut, a bracket, a guide bearing, a track plate, and a guide member, where:

[0021] The motor is fixedly connected to one end of the lead screw. The lead screw nut is rotatably mounted on the lead screw. One end of the bracket is mounted on the lead screw nut, and the other end of the bracket is mounted with either a guide bearing or a track plate;

[0022] The guide member is mounted on the mounting beam and extends along the mounting beam. The bracket is also movably connected to the mounting beam through the guide member. The track plate is provided with a waist-shaped hole for accommodating the guide bearing. The first end of the waist-shaped hole is higher than the second end. The other of the guide bearing and the track plate is also connected to the pressing block;

[0023] The motor is configured to drive the lead screw to rotate, so as to drive the lead screw nut to move along the lead screw, and further cause the guide bearing to move along the waist-shaped hole of the track plate, and the pressing block to move along the first direction or the opposite direction of the first direction.

[0024] By providing a transmission structure such as a lead screw and a track plate for the motor, the motor can drive at least one pressing block to move along the first direction or the opposite direction of the first direction more accurately and stably.

[0025] In a third aspect, the present application provides a picking device, including a moving mechanism and a correction mechanism. The correction mechanism is provided on the driving end of the moving mechanism. The moving mechanism is configured to drive the correction mechanism to translate and lift. The correction mechanism includes the above correction assembly;

[0026] The moving mechanism further includes a swing cylinder, and the swing cylinder is configured to drive the mounting beam to rotate by a set angle around its rotation direction;

[0027] And / or,

[0028] The correction mechanism includes an EL detection assembly. The EL detection assembly includes a detection camera and an energizing structure. The energizing structure is mounted at both ends of the mounting beam. The energizing structure is configured to electrically connect the solder tape ends at the head and tail of the battery string. The detection camera is mounted beside the mounting beam. The detection camera is configured to perform shooting after the energizing structure energizes the battery string.

[0029] In a fourth aspect, the present application provides a battery string splicer, including a loading device, a battery cell handling device, a solder tape handling device, a battery string conveying device, a splicing device, a post-processing conveying line, and the above picking device;

[0030] The loading device is used to provide wafers and solder tapes to the wafer handling device and the solder tape handling device respectively;

[0031] The solder tape handling device is used to receive a set of solder tapes from the loading device and lay them on the battery string conveying device in a predetermined manner;

[0032] The wafer handling device receives at least one set of wafers from the loading device and stacks at least one set of wafers on a set of solder tapes located on the battery string conveying device in a predetermined manner to form a battery string to be connected in series;

[0033] The battery string conveying device sends the stacked battery string to be connected in series to the connection device for connection, so that the solder tapes in the battery string are connected and solidified with the wafers;

[0034] The battery string conveying device is also used to send the completed battery string to the picking device;

[0035] The picking device is used to pick up and correct the battery string and send the corrected battery string to the subsequent conveying line.

[0036] One or more of the above embodiments of the present application have at least one or more of the following beneficial effects:

[0037] Through the cooperation of the pressing block with the arc portion and the lifting structure, it is possible to first achieve line contact with the wafer having a convex deformation at the middle position through the arc portion, and start to squeeze the convex position in the first direction (perpendicular to the wafer and towards the wafer), and use the lifting structure to ensure that both sides of the convex position are fixed by the correcting member, or the lifting structure can be used to apply a pulling force opposite to the first direction to the positions on both sides of the convex position to improve the correction efficiency; during the whole process, the wafer can be fixed in place to ensure the smooth progress of the correction work, and at the same time, only the middle position where the convexity is formed can be squeezed, reducing the probability of damage to the wafer during the correction work.

[0038] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present application. Description of the Drawings

[0039] Referring to the drawings, the disclosure of the present utility model will become more understandable. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the protection scope of the present utility model. In addition, similar numbers in the drawings are used to represent similar components, where:

[0040] Figure 1 is a schematic structural diagram of the correcting member according to the embodiment of the present application;

[0041] Figure 2 Schematic structural diagram of the side of the correction member according to an embodiment of the present application;

[0042] Figure 3 Side view of the correction member according to an embodiment of the present application;

[0043] Figure 4 Schematic structural diagram of the bottom of the correction member according to an embodiment of the present application;

[0044] Figure 5 Schematic structural diagram of the bottom of the pressing block according to an embodiment of the present application;

[0045] Figure 6 Schematic structural diagram of the top of the pressing block according to an embodiment of the present application;

[0046] Figure 7 Schematic structural diagram of one of the correction assemblies according to an embodiment of the present application;

[0047] Figure 8 Schematic structural diagram of the drive assembly according to an embodiment of the present application;

[0048] Figure 9 Schematic structural diagram of another correction assembly according to an embodiment of the present application;

[0049] Figure 10 Schematic structural diagram of the picking device according to an embodiment of the present application.

[0050] Description of reference numerals

[0051] 10. Correction mechanism; 20. Moving mechanism;

[0052] 11. Correction member; 111. Pressing block; 1111. Arc portion; 1112. Cooling groove; 1113. Mounting hole; 112. Lifting structure; 113. Correction bracket; 114. Guide shaft; 115. Motor; 116. Connecting plate; 117. Hook plate; 118. EL detection component; 2. Battery string; 21. Battery cell; 3. Mounting beam. Detailed implementation manners

[0053] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application.

[0054] The IBC cell (back-contact cell) has only the back surface as the welding surface, and its electrodes are all located on this welding surface. After the IBC cells are welded into a string by welding tapes, the welding tapes are all welded on the welding surface of the cells. During the welding process, the welding tapes need to be heated to melt the solder layer on the surface of the welding tapes. After the welding is completed, the welding tapes will gradually cool and shrink, thereby causing a pull on the middle position of the cell towards the welding surface, making it easy for the middle position of the cell to warp and deform. In order to correct the deformation of the cell, the prior art often uses a pressing block with a correction plane to squeeze the cell, but this method of correcting the cell using an entire planar structure is extremely likely to cause damage to the cell during the correction process, resulting in the scrapping of the entire string.

[0055] Based on this, the present application provides a correction member. Through the cooperation of a pressing block with an arc portion and a lifting structure, it can first achieve line contact with the cell with a convex deformation at the middle position through the arc portion, and start to squeeze the convex position in the first direction (perpendicular to the cell and towards the cell), and use the lifting structure to ensure that both sides of the convex position are fixed by the correction member, or the lifting structure can apply a pulling force in the direction opposite to the first direction to the positions on both sides of the convex position to improve the correction efficiency; throughout the process, it can not only fix the cell in place to ensure the smooth progress of the correction work, but also only squeeze the middle position where the convexity is formed, reducing the probability of the cell being damaged during the correction work.

[0056] The following will specifically elaborate on the present application through specific embodiments.

[0057] Referring to Figures 1 to 6 As shown, this embodiment provides a correction member 11. The correction member 11 includes a correction bracket 113, a pressing block 111, and two sets of lifting structures 112. The pressing block 111 and the lifting structures 112 are both installed on the correction bracket 113; the lower surface of the pressing block 111 is provided with an arc portion 1111 for fitting with a cell 21 in the battery string 2. The arc portion 1111 is used to apply pressure in the first direction to the middle position of the cell 21. Specifically, the middle position of the cell 21 can be the area covered from the center of one end of the cell 21 to the center of the other end along the extension direction of the cell 21 (this extension direction is perpendicular to the direction of the battery string 2), that is, the strip-shaped area near its axis. The two sets of lifting structures 112 are symmetrically arranged on both sides of the arc portion 1111 and are used to provide a force for the cell 21 in the direction opposite to the first direction.

[0058] The correction member 11 provided in this embodiment can first achieve line contact with the battery cell 21 with a convex deformation at the middle position through the cooperation of the pressing block 111 with the arc portion 1111 and the lifting structure 112, and start to extrude the convex position in the first direction (perpendicular to and facing the battery cell 21). The lifting structure 112 is used to ensure that both sides of the convex position are fixed by the correction member 11, or the lifting structure 112 can apply a pulling force or a lifting force opposite to the first direction to the positions on both sides of the convex position to improve the correction efficiency; during the whole process, the battery cell 21 can be fixed in place to ensure the smooth progress of the correction work, and at the same time, only the middle position where the convexity is formed is extruded, reducing the probability of damage to the battery cell 21 during the correction work.

[0059] In some embodiments, the axis of rotation of the arc portion 1111 extends in the second direction, and the second direction is perpendicular to the extending direction of the battery string 2; that is to say, the convex position of the arc portion 1111 corresponds to the center position of the battery cell 21, and the vertex of the arc portion 1111 can completely press on the center position of the battery cell 21 and extrude and correct the center position of the battery cell 21, so that the battery cell 21 gradually returns to the normal flat state, that is, the back surface of the battery cell 21 gradually returns to a planar structure.

[0060] Continue to refer to Figure 4 and Figure 5 As shown, cooling grooves 1112 for cooling the battery string 2 are arranged on the arc surface of the arc portion 1111. The cooling grooves 1112 are connected to a gas source. An opening facing the battery string 2 is formed at the bottom of the cooling groove 1112. An air passage communicating with the gas source is arranged inside the pressing block 111, and the air passage is communicated with the opening, so that the cooling groove 1112 is finally communicated with the gas source; the cooling grooves 1112 form a gas flow channel. When the battery string 2 is picked up, through the air extraction or exhaust action of the gas source, the gas quickly flows through the cooling grooves 1112. Therefore, through the arrangement of the cooling grooves 1112, the battery cells 21 and the welding tapes on the battery string 2 can be cooled, thereby preventing the welding tapes from continuing to shrink and causing the battery cells 21 to arch again after the battery string 2 is corrected.

[0061] In some embodiments, the number of cooling grooves 1112 is multiple, and they correspond one-to-one to the positions of the solder tapes on the battery string 2; such an arrangement can uniformly cool all the solder tapes at the same time. Further, each cooling groove 1112 is arranged in parallel with the solder tape, that is, each cooling groove 1112 extends along the second direction and can completely cover the position where the solder tape is located. The cooling grooves 1112 can also be arranged in other shapes such as a loop, an S shape, a Z shape, etc., as long as all the solder tapes can be cooled; the number of cooling grooves 1112 can also be more than the number of solder tapes, specifically, it can be a multiple of the solder tapes, so as to realize that more than one cooling groove 1112 cools one solder tape, further improving the cooling efficiency of the solder tape.

[0062] In some further embodiments, the pressing block 111 is slidably arranged on the correction bracket 113 through a guide shaft 114 extending along the first direction. An elastic member for providing an elastic force in the first direction to the pressing block 111 is provided between the pressing block 111 and the correction bracket 113. Specifically, the guide shaft 114 can be slidably matched with the correction bracket 113, and the pressing block 111 is fixedly connected to the bottom end of the guide shaft 114. It can also be that the guide shaft 114 is slidably matched with the pressing block 111, and the guide shaft 114 is fixedly connected to the correction bracket 113, as long as the pressing block 111 can reciprocate in the first direction. The elastic member can provide a pressure towards the battery string 2 to the pressing block 111 and also form a buffering effect. The settings of the guide shaft 114 and the elastic member can improve the correction effect of the pressing block 111 on the battery cell 21 and prevent the pressing block 111 from rigidly contacting the battery cell 21 and damaging the battery cell 21. It should be understood that the elastic member can be a common elastic structure such as a cylindrical compression spring or a metal spring piece sleeved outside the guide shaft 114; and / or, a motor 115 can also be arranged on the correction bracket 113. The driving end of the motor 115 is connected to the pressing block 111, and the motor 115 is used to drive the pressing block 111 to move along the first direction or the opposite direction of the first direction; the motor 115 can directly drive the pressing block 111 to reciprocate along the first direction or its opposite direction, thereby improving the correction effect of the pressing block 111 on the battery cell 21. Optionally, the motor 115 is connected to the pressing block 111 through the guide shaft 114.

[0063] Continue to refer to Figures 1 to 4As shown, in some embodiments, each lifting structure 112 includes a plurality of suction cups arranged in the second direction and connected to a gas source. The suction cups are used to continuously provide an adsorption force in the direction opposite to the first direction to the corresponding solar cell 21 during the stage of picking up the battery string 2. The number of suction cups can be an even number of four or more, so as to provide a stable adsorption effect for the solar cell 21. It should be understood that the lifting structure 112 can also be structures such as screws, rivets, and pallets, and are connected to the solar cell 21 by means of threaded connection, riveting, bonding, welding, lifting, etc. When the lifting structure 112 is a suction cup, it is more convenient for the lifting structure 112 to be combined with and separated from the solar cell 21, thereby significantly improving the efficiency of the entire correction work. Moreover, when the pressing block 111 provides a pressure in the first direction at the central position of the solar cell 21, a pulling force (adsorption force) opposite to the first direction is provided on both sides of the central position of the solar cell 21, so as to ensure the pressing effect of the pressing block 111 and prevent the battery string 2 from falling.

[0064] In some further embodiments, the pressing block 111 is provided with mounting holes 1113 extending in the first direction and corresponding to the suction cups one by one. The suction cups act on the solar cell 21 through the corresponding mounting holes 1113. Among them, the mounting holes 1113 are through holes, and the diameter of the mounting holes 1113 matches the diameter of the suction cups, so as to limit and fix the circumferential side surface of the suction cups through the mounting holes 1113, reduce the negative impact caused by the possible vibration of the suction cups during operation, and make the adsorption and fixing effect of the suction cups on the solar cell 21 better.

[0065] In a second aspect, continue to refer to Figures 7 to 10 As shown, the present application provides a battery string 2 correction assembly, including a mounting beam 3 and a plurality of correction members 11 as above. The plurality of correction members 11 are arranged on the mounting beam 3 in sequence along the extension direction of the battery string 2. The plurality of correction members 11 are arranged in one-to-one correspondence with a plurality of solar cells 21 in the battery string 2 in the first direction. Each correction member 11 is used to provide a pressure in the first direction to the corresponding solar cell 21. The plurality of correction members 11 move synchronously in the first direction through the mounting beam 3 to simultaneously complete the correction work of all the solar cells 21 in the battery string 2.

[0066] In some embodiments, continue to refer to Figure 7 and Figure 8As shown, a driving member may also be provided on the correction bracket 113. The driving member at least includes a motor 115, a connecting plate 116, and a hook plate 117. The motor 115 is arranged on the mounting beam 3 and is connected to the driving end connecting plate 116 of the motor 115. A plurality of hook plates 117 are arranged on the connecting plate 116 at equal intervals along the extending direction of the battery string 2. Each hook plate 117 is connected to one or more guide shafts 114 or pressing blocks 111. The motor 115 is used to drive the guide shaft 114 or the pressing block 111 to move along the first direction or the opposite direction of the first direction, so that in one correction operation, the pressing block 111 can press the battery cell 21 once, twice or more times, thereby improving the correction effect and correction efficiency of the battery cell 21.

[0067] In some embodiments, the driving member may also include a motor 115, a lead screw, a lead screw nut, a bracket, a guide bearing, a track plate, and a guide member. The motor 115 is fixedly connected to one end of the lead screw or fixedly connected through a coupling. The lead screw nut is rotatably mounted on the lead screw. When the motor 115 drives the lead screw to rotate, the lead screw nut can move along the extending direction of the lead screw. The bracket is fixedly mounted on the lead screw nut, and a guide bearing is mounted on the bracket. The guide member is mounted on the mounting beam 3 and extends along the mounting beam 3. The bracket is also movably connected to the mounting beam 3 through the guide member, where the guide member can be selected from common devices with moving guidance such as slide rails and sliders. The track plate is provided with a waist-shaped hole for accommodating the guide bearing. The waist-shaped hole extends from high to low, that is, the first end of the waist-shaped hole is higher than the second end. The guide bearing extends into the waist-shaped hole, and the inner side of the waist-shaped hole contacts the outer ring of the guide bearing. The track plate is also fixedly connected to the top end of the pressing block 111 or the guide shaft 114. When the motor 115 drives the lead screw to rotate, the lead screw nut is driven by the lead screw, and the bracket moves together with the lead screw nut. Furthermore, the guide bearing moves along the waist-shaped hole of the track plate, and finally the track plate drives the pressing block 111 to move along the first direction or the opposite direction of the first direction, realizing the correction of the battery string 2.

[0068] In addition, the above embodiments can also change the connection relationship and can also realize the driving of the pressing block 111, that is: the motor 115 is fixedly mounted on the mounting beam 3, the lead screw is rotatably mounted on the mounting beam 3 coaxially with the driving end of the motor, the motor 115 drives the lead screw nut to move horizontally through the lead screw, the bracket is fixedly mounted on the lead screw nut, the track plate is movably mounted on the mounting beam 3 through the guide member, and the bracket is connected to the track plate. The guide bearing is accommodated in the waist-shaped hole of the track plate. One end of the waist-shaped hole is higher than the other end, and the guide bearing is also connected to the upper end of the pressing block 111 or the guide shaft 114, for example, through a common connection structure such as a connecting plate 116. With such a setting, when the motor 115 drives the lead screw to rotate, the lead screw nut drives the bracket to move horizontally, and the track plate moves horizontally accordingly. Since the guide bearing is located inside the waist-shaped hole of the track plate, the guide bearing will move along the waist-shaped hole, driving the pressing block 111 to move along the first direction or the reverse direction of the first direction, and also realizing the correction of the battery string 2.

[0069] It should be emphasized that the specific quantity relationship and corresponding relationship among the motor 115, the bracket, the lead screw, the lead screw nut, the track plate, the guide bearing, and the guide member in this embodiment are not limited. For example, there is one lead screw nut on one lead screw, or there are several lead screw nuts on one lead screw; there is one bracket on one lead screw nut, or there are several brackets on one lead screw nut; there is one guide bearing on one bracket or there are several guide bearings on one bracket... and so on. Two components in contact in a transmission or non-transmission manner can be connected one-to-many or many-to-one; a track plate can also have one, two or more kidney-shaped holes. This embodiment only elaborates on the transmission connection principle, actions and effects of each component. Specifically, it can be adaptively set according to the actual situation without conflict. Limited by space, this application does not enumerate all possible combinations. As long as it conforms to the description of the transmission relationship in this embodiment, it still belongs to the embodiment of this application.

[0070] In the third aspect, still referring to Figure 10 as shown, the present application provides a picking device, including a moving mechanism 20 and a correction mechanism 10. The correction mechanism 10 is arranged on the driving end of the moving mechanism 20. The moving mechanism 20 is used to drive the correction mechanism 10 to translate and lift. The correction mechanism 10 includes the correction assembly as above; the moving mechanism 20 further includes a swing cylinder, and the swing cylinder is used to drive the mounting beam 3 to rotate a set angle around its rotation direction. The set angle can be 90°, 180° or other angles set according to the actual situation; and / or, the correction mechanism 10 further includes an EL detection assembly 118. The EL detection assembly 118 includes a detection camera (not shown) and an energizing structure. The energizing structure is installed at both ends of the mounting beam 3. The energizing structure is used to electrically connect the welding tape ends at the head and tail of the battery string 2. Specifically, the energizing structure includes an upper cushion block and a lower cushion block. The upper cushion block and the lower cushion block are respectively used to clamp the two side surfaces of the welding tape of the battery cell 21 at the head or tail end in the first direction. The energizing structure further includes a first cylinder for driving the lower cushion block to reciprocate in the first direction, and a second cylinder for driving the lower cushion block to reciprocate in the extending direction of the battery string 2. By setting the first cylinder and the second cylinder, the lower cushion block can be lowered, laterally moved, and raised, so as to cooperate with the upper cushion block to clamp the welding tape ends at the head and tail of the battery string 2, and further realize the flexible electrical connection and separation between the energizing structure and the battery string 2. The detection camera is installed beside the mounting beam 3, and the detection camera is used to take pictures after the energizing structure energizes the battery string 2.

[0071] In a fourth aspect, the present application provides a 21-cell stringing machine for batteries, which includes a feeding device, a battery cell 21 handling device, a solder tape handling device, a battery string conveying device, a stringing device, a post-processing conveying line, and a picking device as described above; the feeding device is used to respectively provide battery cells 21 and solder tapes to the battery cell 21 handling device and the solder tape handling device; the solder tape handling device is used to receive a set of solder tapes from the feeding device and lay them on the battery string conveying device in a predetermined manner; the battery cell 21 handling device receives at least one set of battery cells 21 from the feeding device and stacks at least one set of battery cells 21 on a set of solder tapes located on the battery string conveying device in a predetermined manner to form a battery string 2 to be strung; the battery string conveying device sends the stacked battery string 2 to be strung to the stringing device for stringing, so that the solder tapes in the battery string 2 are connected and cured with the battery cells 21; the battery string conveying device is also used to send the completed battery string 2 to the picking device; the picking device is used to pick up and correct the battery string 2 and send the corrected battery string 2 to the post-processing conveying line.

[0072] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0073] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A corrective element, characterized in that, The correction member includes a correction bracket, a pressing block, and two sets of lifting structures. The pressing block and the lifting structures are both installed on the correction bracket. The lower surface of the pressing block is provided with an arc portion for fitting with a cell in the cell string. The arc portion is used to apply a pressure in the first direction to the middle position of the cell. The two sets of lifting structures are symmetrically arranged on both sides of the arc portion and are used to provide a force in the direction opposite to the first direction for the cell.

2. The corrective member according to claim 1, characterized in that, The rotation axis of the arc portion extends in the second direction, and the second direction is perpendicular to the extension direction of the cell string.

3. The corrective element according to claim 1, characterized in that, Cooling grooves for cooling the cell string are arranged on the arc surface of the arc portion. The cooling grooves are connected to a gas source, and openings facing the cell string are formed in the cooling grooves.

4. The corrective element according to claim 3, wherein, The number of the cooling grooves is multiple, and they correspond to the positions of the solder tapes on the cell string one by one.

5. The corrective element according to claim 1, characterized in that, The pressing block is slidably arranged on the correction bracket through a guide shaft extending in the first direction. An elastic member for providing an elastic force in the first direction is arranged between the pressing block and the correction bracket.

6. The corrective element according to claim 1, characterized in that, Each set of the lifting structures includes a plurality of suction cups arranged in the second direction and connected to a gas source. The suction cups are used to continuously provide an adsorption force in the direction opposite to the first direction for the corresponding cell during the stage of picking up the cell string.

7. The corrective element according to claim 6, characterized in that, Mounting holes extending in the first direction and corresponding to the suction cups one by one are formed in the pressing block, and the suction cups act on the cell through the corresponding mounting holes.

8. A correction component, characterized in that, The correction assembly includes a mounting beam and a plurality of correction members as described in any one of claims 1 to 7. The plurality of correction members are sequentially arranged on the mounting beam along the extension direction of the cell string. The plurality of correction members are arranged in one-to-one correspondence with a plurality of cells in the cell string in the first direction. Each correction member is used to provide a pressure in the first direction for the corresponding cell. The plurality of correction members move synchronously in the first direction through the mounting beam to simultaneously complete the correction work of all cells in the cell string.

9. The correction component according to claim 8, characterized in that, A driving member is arranged on the correction bracket or the mounting beam. The driving member includes a motor. The driving end of the motor is connected to the pressing block, and the motor is used to drive the pressing block to move along the first direction or the opposite direction of the first direction.

10. The correction assembly according to claim 9, wherein, The driving member further includes a lead screw, a lead screw nut, a bracket, a guide bearing, a track plate, and a guide member, wherein: The motor is fixedly connected to one end of the lead screw. The lead screw nut is rotatably installed on the lead screw. One end of the bracket is installed on the lead screw nut, and the other end of the bracket is installed with one of the guide bearing and the track plate. The guide member is installed on the mounting beam and extends along the mounting beam. The bracket is also movably connected to the mounting beam through the guide member. The track plate is provided with a waist-shaped hole for accommodating the guide bearing. The first end of the waist-shaped hole is higher than the second end. The other of the guide bearing and the track plate is also connected to the pressing block. The motor is configured to drive the lead screw to rotate, so as to drive the lead screw nut to move along the lead screw, and further enable the guiding bearing to move along the waist-shaped hole of the track plate, and the pressing block to move along the first direction or the opposite direction of the first direction.

11. A picking device, characterized in that, The picking device includes a moving mechanism and a correcting mechanism. The correcting mechanism is arranged on the driving end of the moving mechanism. The moving mechanism is used to drive the correcting mechanism to translate and lift. The correcting mechanism includes a correcting component as described in any one of claims 8 to 10. The moving mechanism further includes a swing cylinder, and the swing cylinder is used to drive the mounting beam to rotate by a set angle around its rotation direction. and / or The correcting mechanism includes an EL detection component. The EL detection component includes a detection camera and a power-on structure. The power-on structure is installed at both ends of the mounting beam. The power-on structure is used to electrically connect the welding tape ends at the head and tail of the battery string. The detection camera is installed beside the mounting beam. The detection camera is used to perform shooting after the power-on structure powers on the battery string.

12. A cell string connecting machine, characterized in that, It includes a loading device, a battery cell handling device, a welding tape handling device, a battery string conveying device, a stringing device, a post-processing conveying line, and a picking device as described in claim 11. The loading device is used to respectively provide battery cells and welding tapes to the battery cell handling device and the welding tape handling device. The welding tape handling device is used to receive a set of welding tapes from the loading device and lay them on the battery string conveying device in a predetermined manner. The battery cell handling device receives at least one set of battery cells from the loading device and stacks at least one set of battery cells on a set of welding tapes located on the battery string conveying device in a predetermined manner to form a battery string to be strung. The battery string conveying device sends the stacked battery string to be strung to the stringing device for stringing, so that the welding tapes in the battery string are connected and solidified with the battery cells. The battery string conveying device is further used to send the completed strung battery string to the picking device. The picking device is used to pick up and correct the battery string and send the corrected battery string to the post-processing conveying line.

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