Battery cell pre-welding production loop line and battery production system

Abstract

The utility model relates to the technical field of battery automatic production equipment, in particular to a battery cell pre-welding production loop line and a battery production system.The battery cell pre-welding production loop line comprises a magnetic suspension transportation loop line, a feeding unit, a tab shaping unit, a pre-welding unit and a discharging unit; the magnetic suspension transportation loop line comprises a first conveying line body, a second conveying line body and at least two lifting parts, the arrangement height of the second conveying line body is higher than that of the first conveying line body, and the two ends of the second conveying line body are connected with the two ends of the first conveying line body through the lifting parts correspondingly. The first conveying line body and the second conveying line body are arranged in a surrounding mode so that a closed conveying line can be defined by the first conveying line body and the second conveying line body, and a feeding channel capable of entering a space defined by the closed conveying line is formed in the position, located below the second conveying line body, of the closed conveying line. According to the battery cell pre-welding production loop line and the battery production system, the conveying efficiency of all stations and the space utilization rate of the loop line are improved, and the feeding and discharging path is shortened.

Description

Technical Field

[0001] The present application relates to the technical field of battery automated production equipment, and in particular to a battery cell pre-welding production loop line and a battery production system. Background Art

[0002] With the rapid development of electronic equipment, the market demand for square shell blade batteries has increased dramatically. Most of the high-speed production lines in the industry achieve high production capacity by stacking more workstations. At the same time, the transfer of products between workstations has become a bottleneck of the equipment. At the same time, the equipment occupies a large area, and there are many workstations and they are densely distributed, making maintenance and inspection inconvenient. How to solve the above technical problems to improve the production capacity of square shell blade battery production lines has become an urgent problem to be solved in this field.

[0003] Moreover, the current square shell blade battery production line has many assembly steps, which makes the production line process distance long, making the reflow of assembly jigs difficult. Today's jig reflow usually includes two methods. One method is the double-layer conveyor line method, that is, a jig reflow line with the same length as the production conveyor line is arranged on the upper / lower layer of the production conveyor line, and the jig is circulated at the ends of the production conveyor line and the jig reflow line through lifting equipment or manipulators. However, in this method, the jig reflow path is long and the probability of failure during the reflow process is high; the other method is the loop line transmission method, that is, the production conveyor line and the jig reflow line are enclosed to form a closed-loop conveyor line. In this way, the jig reflow line transmission distance can be greatly shortened, but the closed-loop conveyor line occupies a large space, and each workstation of the production conveyor line needs to bypass the closed-loop conveyor line for loading and unloading, which affects production efficiency. Utility Model Content

[0004] The purpose of the present application is to provide a battery cell pre-welding production loop line and a battery production system, so as to solve to a certain extent the technical problems existing in the prior art that the production capacity of the square shell blade battery production line needs to be improved urgently, the jig is transported by means of a double-layer conveyor line, the jig reflow path is long, the probability of failure during the reflow process is high, and the jig is transported by means of a loop line, the closed-loop conveyor line occupies a large space, and the loading and unloading of each workstation of the production conveyor line needs to bypass the closed-loop conveyor line, affecting the production efficiency.

[0005] According to a first aspect of the present application, a battery cell pre-welding production loop line is provided, comprising a magnetic suspension transport loop line, a loading unit, a tab shaping unit, a pre-welding unit and a unloading unit;

[0006] The magnetic suspension transport loop line includes a first conveying line body, a second conveying line body and at least two lifting parts, the second conveying line body is arranged at a higher height than the first conveying line body, and two ends of the second conveying line body are respectively connected to two ends of the first conveying line body via the lifting parts, so that the first conveying line body and the second conveying line body are enclosed to form a closed conveying line, and the position of the closed conveying line located below the second conveying line body forms a loading channel that can enter the space enclosed by the closed conveying line;

[0007] The closed conveyor line can sequentially convey the battery cells to be processed among the loading unit, the tab shaping unit, the pre-welding unit and the unloading unit.

[0008] Preferably, the magnetic suspension transport loop line further comprises a mover for carrying the battery core to be processed;

[0009] In a conveying direction perpendicular to the closed conveying line, the size of the mover is larger than the line width of the closed conveying line, so that both ends of the mover extend beyond the line of the closed conveying line;

[0010] When the battery cell to be processed is arranged on the mover, the positive electrode and the negative electrode of the battery cell to be processed are arranged opposite to each other in a conveying direction perpendicular to the closed conveying line.

[0011] Preferably, the loading unit includes a loading device, which includes a grabbing part and at least two pole-pulling ears. The grabbing part is used to grab the battery cell to be processed onto the closed conveyor line, and the pole-pulling ears are arranged on both sides of the line body of the closed conveyor line to arrange the pole ears of the battery cell to be processed on the closed conveyor line.

[0012] Preferably, the tab shaping unit is arranged downstream of the feeding unit, and the tab shaping unit comprises a tab welding device for welding and fixing the tabs of the battery cell to be processed.

[0013] Preferably, there are multiple tab welding devices, and the multiple tab welding devices are arranged in sequence along the conveying direction of the closed conveying line, wherein at least one of the multiple tab welding devices is a spare tab welding device;

[0014] And / or, the tab shaping unit further comprises:

[0015] A first visual inspection unit is provided between the feeding unit and the tab welding device to detect the folding of the tabs and diaphragms of the battery cell to be processed;

[0016] A first flattening device is arranged downstream of the plurality of tab welding devices as a whole to flatten and shape the tabs of the battery cell to be processed;

[0017] A cutting device, disposed downstream of the first flattening device, to cut the flattened and shaped tabs of the battery cell to be processed;

[0018] The first dust removal device is arranged downstream of the cutting device and is used to remove the cutting dust of the battery cell to be processed.

[0019] Preferably, the pre-welding unit is arranged downstream of the tab shaping unit, and the pre-welding unit comprises:

[0020] A first glue sticking device, disposed downstream of the tab shaping unit, for sticking a first insulating glue on the end of the battery cell to be processed close to the closed conveyor line;

[0021] The cover plate storage device is provided with a buffer space for storing the cover plates;

[0022] A cover plate feeding device, arranged downstream of the first gluing device, to grab the cover plates in the cover plate storage device to the corresponding position of the closed conveyor line;

[0023] A cover plate pre-welding device, disposed downstream of the cover plate feeding device, for welding the tabs of the battery cell to be processed to the cover plate;

[0024] The second glue sticking device is arranged downstream of the cover plate pre-welding device to cover the welds between the battery cell to be processed and the cover plate with a second insulating glue.

[0025] Preferably, there are multiple first gluing devices, and the multiple first gluing devices are arranged in sequence along the conveying direction of the closed conveying line, wherein at least one of the multiple first gluing devices is a spare first gluing device;

[0026] And / or, there are multiple second gluing devices, and the multiple second gluing devices are arranged in sequence along the conveying direction of the closed conveying line, wherein at least one of the multiple second gluing devices is a spare second gluing device;

[0027] And / or, the cover plate storage device is arranged inside the space enclosed by the closed conveyor line, and the loading channel can be connected to the cover plate storage device;

[0028] And / or, the pre-welding unit further comprises:

[0029] A second visual inspection unit is provided between the tab shaping unit and the first glue sticking device, and is used to inspect the tab cutting condition of the battery cell to be processed;

[0030] A second flattening device, disposed between the first glue sticking device and the cover plate feeding device, for flattening the first insulating glue so that the first insulating glue is evenly attached to the battery cell to be processed;

[0031] A third visual inspection unit, disposed between the second flattening device and the cover plate feeding device, for inspecting the first insulating adhesive attachment quality;

[0032] A first outflow station, comprising a defective product storage unit and a manipulator, wherein the first outflow station is arranged downstream of the third visual inspection unit and on one side of the cover plate storage device to move defective products upstream of the first outflow station out of the closed conveyor line;

[0033] A second dust removal device is provided between the cover plate pre-welding device and the second glue sticking device, and is used to remove processing dust of the battery cell to be processed;

[0034] A profilometer is provided between the second dust removal device and the second glue sticking device to detect the quality of the weld between the battery cell to be processed and the cover plate;

[0035] The fourth visual inspection is arranged downstream of the second gluing device and is used to inspect the attachment quality of the second insulating glue.

[0036] Preferably, the unloading unit comprises:

[0037] A third dust removal device is arranged downstream of the pre-welding unit and is used to remove dust from the upper surface of the battery cell to be processed;

[0038] A fifth visual inspection unit, disposed downstream of the third dust removal device, for inspecting the upper surface quality of the battery cell to be processed;

[0039] The lower surface dust removal inspection station includes a lifting gripper, a fourth dust removal device and a sixth visual inspection. The battery cell to be processed that flows into the lower surface dust removal inspection station can be lifted by the lifting gripper to be separated from the mover. At this time, the fourth dust removal device and the sixth visual inspection sequentially perform dust removal and quality inspection on the lower surface of the battery cell to be processed. After completion, the lifting gripper puts the battery cell to be processed back to the corresponding mover;

[0040] A material discharge device, used for placing and / or transferring the qualified battery cells to be processed;

[0041] The unloading grabbing device grabs the qualified battery cells to be processed and transfers them to the outflow device.

[0042] Preferably, the first conveyor line body comprises a first jig reflow section, a loading section, a pre-welding section, a unloading section and a second jig reflow section connected in sequence;

[0043] The feeding unit and the tab shaping unit are arranged in the feeding section, the pre-welding unit is arranged in the pre-welding section, the unloading unit is arranged in the unloading section, and the second conveyor line connects one end of the first jig reflow section away from the feeding section and one end of the second jig reflow section away from the unloading section;

[0044] And / or, the conveying directions of the first jig reflow section, the loading section, the pre-welding section, the unloading section and the second jig reflow section are all straight lines, the first conveying line further comprises a turning portion, and the first jig reflow section and the loading section, the loading section and the pre-welding section, the pre-welding section and the unloading section, and the unloading section and the second jig reflow section are all connected via the turning portion;

[0045] And / or, the first jig reflux section is further provided with a fifth dust removal device for removing dust from the mover;

[0046] And / or, the second fixture reflow section is further provided with a second outflow station, which is used for the outflow station to move defective products upstream of the second outflow station out of the closed conveyor line.

[0047] According to the second aspect of the present application, a battery production system is provided, comprising the battery cell pre-welding production loop line described in any of the above technical solutions, and thus having all the beneficial technical effects of the battery cell pre-welding production loop line, which will not be repeated here.

[0048] Compared with the prior art, the beneficial effects of this application are:

[0049] The battery cell pre-welding production loop line provided by the present application, on the one hand, replaces the traditional conveyor belt transmission with the transmission method of the magnetic levitation transport loop line, and the integrated design of the assembly line mover fixture transportation and processing, utilizes the high flexibility, intelligence, modularity, high speed, high acceleration and other characteristics of the magnetic levitation system, and effectively improves the transmission efficiency between various stations of the battery assembly line; on the other hand, by setting the second transmission line body to be higher than the first transmission line body, and making the two ends of the first transmission line body connected to the two ends of the second line body via a lifting part, so that the first transmission line body and the second transmission line body are enclosed to form a closed transmission line, and the position of the closed transmission line below the second transmission line body forms a closed transmission line. The feeding channel is inside the space enclosed by the line. In this way, after the mover passes the processed battery cell through the loading unit, the tab shaping unit, the pre-welding unit and the unloading unit in sequence, the mover can be transported again to the position of the loading unit via the closed conveyor line to realize the circulation of the mover. Compared with the existing double-layer conveyor line transmission method, the distance of the mover's reflux transmission is greatly shortened, which effectively reduces the failure rate of the mover's reflux, and through the above-mentioned feeding channel, it is convenient for personnel / materials to enter the interior of the space enclosed by the closed conveyor line, which can not only utilize the internal storage materials of the space enclosed by the closed conveyor line to improve the space utilization rate of the battery cell pre-welding production loop line, but also facilitate loading and unloading of each workstation and shorten the loading and unloading path.

[0050] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0052] Figure 1 A schematic diagram of the structure of a battery cell pre-welding production loop line provided in an embodiment of the present application;

[0053] Figure 2 A schematic diagram of the layout structure of the feeding section provided in the embodiment of the present application;

[0054] Figure 3 for Figure 2 The enlarged structural schematic diagram of the feeding section at position A is provided;

[0055] Figure 4 A schematic diagram of the layout structure of the pre-welding section provided in an embodiment of the present application;

[0056] Figure 5 for Figure 4 The enlarged structural diagram of the pre-welding section at position B is provided;

[0057] Figure 6 for Figure 4 The enlarged structural diagram of the pre-welding section at position C is provided;

[0058] Figure 7 A schematic diagram of the layout structure of the unloading section provided in the embodiment of the present application;

[0059] Figure 8 A schematic diagram of the layout structure of the reflux section provided in an embodiment of the present application.

[0060] Reference numerals:

[0061] 111-feeding section; 112-pre-welding section; 113-feeding section; 114-first jig reflow section; 115-second jig reflow section; 116-turning section; 12-second conveyor line; 13-mover; 14-feeding channel; 15-lifting section; 21-feeding device; 22-first visual inspection section; 23-ear welding device; 231-first welding section; 232-second welding section; 24-first flattening device; 25-cutting device; 26-first dust removal device; 31-first gluing device; 311-first gluing section; 312-first slide section; 32-fourth visual inspection section; 33-cover plate pre-welding device; 34-second gluing device; 35-second visual inspection section; 36-second flattening device; 37-third Visual inspection unit; 38-second dust removal device; 39-contour meter detection; 41-third dust removal device; 42-fifth visual inspection unit; 43-lower surface dust removal detection station; 44-code scanning and error correction device; 451-material unloading and grabbing device; 452-material unloading and outflow device; 453-material unloading and testing device; 51-second outflow station; 511-second defective product manipulator; 512-second defective product storage unit; 52-motor maintenance station; 61-cover loading device; 611-cover gripper; 612-cover encoding unit; 613-cover loading station; 62-cover storage device; 63-first defective product storage unit; 7-fifth dust removal device; 8-battery cell to be processed; 81-first insulating glue; 82-cover; 83-second insulating glue. DETAILED DESCRIPTION

[0062] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0063] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0064] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0065] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] Refer to the following Figures 1 to 8 A battery cell pre-welding production loop and a battery production system according to some embodiments of the present application are described.

[0068] See also Figures 1 to 8As shown, an embodiment of the first aspect of the present application provides a battery cell pre-welding production loop line, which includes a magnetic levitation transport loop line, a feeding unit, a tab shaping unit, a pre-welding unit and a feeding unit. Specifically, the magnetic levitation transport loop line includes a first conveyor line body, a second conveyor line body 12, a mover 13 and at least two lifting parts 15. The second conveyor line body 12 is arranged at a higher height than the first conveyor line body. The two ends of the second conveyor line body 12 are respectively connected to the two ends of the first conveyor line body via the lifting parts 15, so that the first conveyor line body and the second conveyor line body 12 are both enclosed to form a closed conveyor line, and the position of the closed conveyor line located below the second conveyor line body 12 forms a feeding channel 14 that can enter the space enclosed by the closed conveyor line. The four units of the feeding unit, the tab shaping unit, the pre-welding unit and the feeding unit are arranged in sequence along the closed conveyor line, and the mover 13 can circulate on the closed conveyor line to transfer the battery cells 8 to be processed between the various workstations.

[0069] According to the battery cell pre-welding production loop provided by the above-mentioned technical features, on the one hand, the transmission method of the magnetic levitation transport loop line replaces the traditional conveyor belt transmission, and the assembly line mover 13 is designed with integrated jig transportation and processing, and the high flexibility, intelligence, modularity, high speed, high acceleration and other characteristics of the magnetic levitation system are utilized to effectively improve the transmission efficiency between various stations of the battery assembly line; on the other hand, by setting the second transmission line body 12 to be higher than the first transmission line body, and making the two ends of the first transmission line body connected to the two ends of the second line body via the lifting part 15, so that the first transmission line body and the second transmission line body 12 are enclosed to form a closed transmission line, and the position of the closed transmission line located below the second transmission line body 12 forms a closed transmission line that can enter the closed transmission line enclosure. The feeding channel 14 inside the space, so that after the mover 13 passes the processed battery cell through the feeding unit, the ear shaping unit, the pre-welding unit and the unloading unit in sequence, the mover 13 can be transported again to the position of the feeding unit via the closed conveyor line to realize the circulation of the mover 13. Compared with the existing double-layer conveyor line transmission method, the reflux transmission distance of the mover 13 is greatly shortened, which effectively reduces the failure rate of the reflux of the mover 13. In addition, through the above-mentioned feeding channel 14, it is convenient for personnel / materials to enter the interior of the space enclosed by the closed conveyor line, which can not only utilize the internal storage materials of the space enclosed by the closed conveyor line to improve the space utilization rate of the battery cell pre-welding production loop line (hereinafter referred to as the loop line), but also facilitate loading and unloading of each workstation and shorten the loading and unloading path.

[0070] It should be noted that the above-mentioned magnetic levitation transport loop line can be understood as a magnetic levitation transmission device that uses the magnetic levitation principle to achieve transmission (for example, the CN220299746U magnetic levitation transmission device and magnetic levitation transmission line disclosed in Chinese patent document). The transmission principle and transmission structure of the device are both existing technologies in the field and will not be repeated here.

[0071] Preferably, if Figure 1 and Figure 8 As shown, the number of the lifting parts 15 can be two, and the two lifting parts 15 are respectively used to connect the two ends of the first transmission line body and the second transmission line body 12 corresponding to each other.

[0072] Preferably, the lifting part 15 may be a magnetic levitation conveying device connecting the first conveying line body and the second conveying line body 12, but is not limited thereto. As long as the conveying rhythm of the first conveying line body can be met, the lifting part 15 may also be a robot, an elevator or other lifting equipment.

[0073] Preferably, if Figures 1 to 8 As shown, in the conveying direction perpendicular to the closed conveyor line, the size of the mover 13 is larger than the line width of the closed conveyor line, so that both ends of the mover 13 exceed the line width of the closed conveyor line. In this way, each station in the above-mentioned loading unit, tab shaping unit, pre-welding unit and unloading unit can process the battery cell 8 to be processed from both ends of the battery cell 8 to be processed in the conveying direction perpendicular to the closed conveyor line.

[0074] Preferably, if Figure 5 and Figure 6 As described, when the battery cell 8 to be processed is set on the mover 13, the positive pole and the negative pole of the battery cell 8 to be processed are relatively arranged in a conveying direction perpendicular to the closed conveyor line, so that each workstation in the loading unit, the pole ear shaping unit, the pre-welding unit and the unloading unit can operate the battery cell 8 to be processed.

[0075] Preferably, the above-mentioned mover 13 may include a conveying part and a jig part connected to each other, and the mover 13 is conveyed and connected to the above-mentioned closed conveying line via the conveying part, and the jig part is used to place the above-mentioned battery cell 8 to be processed, and the size of the jig part in the conveying direction perpendicular to the closed conveying line is larger than the line width of the closed conveying line.

[0076] In an embodiment, preferably, Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, the first conveyor line body includes a loading section 111 , and the loading unit and the tab shaping unit can be sequentially arranged on the loading section 111 .

[0077] Preferably, the feeding section 111 may extend in a straight line direction to further improve the conveying efficiency of the feeding section 111. For the convenience of description, the extending direction of the feeding section 111 is defined as a first direction.

[0078] Preferably, if Figure 1 and Figure 2As shown, the above-mentioned loading unit may include a loading device 21 , and the loading device 21 includes a grasping portion, and the grasping portion is used to grasp the battery cell 8 to be processed onto the mover 13 .

[0079] Optionally, the grasping portion may be a robot arm to grasp the to-be-processed battery cell 8 that has completed the lamination process to a corresponding position of the jig portion of the mover 13 .

[0080] Preferably, the loading device 21 may further include a pole lug-smoothing portion for arranging the pole lugs of the battery cells 8 to be processed on the mover 13 .

[0081] Preferably, the loading device 21 may include two pole-pulling ears, which are arranged on both sides of the line body of the closed conveyor line to respectively correspond to the positive pole ears and the negative pole ears of the battery cell 8 to be processed.

[0082] Optionally, the above-mentioned straightening ear part may include a lever and a linear drive member connected to each other, and the linear drive member can drive the lever to move from the middle of the battery cell 8 to be processed to the outside along a transmission direction perpendicular to the closed conveyor line, so as to straighten the ear of the battery cell 8 to be processed, so as to facilitate the detection, processing and positioning of the ear.

[0083] Optionally, the linear drive member may be a cylinder, a linear motor, or the like.

[0084] Preferably, if Figure 1 and Figure 2 As shown, the above-mentioned loading unit can include multiple groups of loading devices 21, and the multiple groups of loading devices 21 can be arranged in sequence along the conveying direction of the closed conveyor line, so that the loop line can process multiple groups of battery cells 8 to be processed at the same time, so as to further improve the production capacity of the loop line.

[0085] like Figure 1 and Figure 2 The above-mentioned feeding unit is provided with two groups of feeding devices 21 as an example, wherein each feeding device 21 may include two processing stations. In other words, Figure 1 and Figure 2 The loop line example shown can simultaneously realize the assembly of four to-be-processed battery cells 8. However, it is not limited thereto, and the number of the feeding devices 21 and the processing stations included in the feeding devices 21 can be adaptively adjusted according to the actual required capacity of the loop line.

[0086] It should be noted that the above-mentioned feeding device 21 includes two processing stations, which can be understood as the feeding device 21 including two grasping parts and two pole-pulling ears.

[0087] Preferably, if Figure 1 and Figure 2As shown, the tab shaping unit may be arranged downstream of the feeding unit, and the tab shaping unit may include a tab welding device 23 for welding and fixing the tabs of the battery cell 8 to be processed.

[0088] Preferably, if Figures 1 to 3 As shown, the above-mentioned tab welding device 23 may include a first welding portion 231 and a second welding portion 232 which are arranged opposite to each other on both sides of the loading section 111, so that the tab welding device 23 can simultaneously weld and fix the positive tab and the negative tab of the tab to be processed, thereby further improving the processing efficiency of the tab welding device 23.

[0089] Optionally, the first welding part 231 and the second welding part 232 may both be ultrasonic direct welding devices. However, it is not limited thereto, and the first welding part 231 and the second welding part 232 may also be other welding devices as long as the tab can be welded and fixed.

[0090] Preferably, if Figures 1 to 3 As shown, the number of the above-mentioned pole tab welding devices 23 can be multiple, and the multiple pole tab welding devices 23 are arranged in sequence along the conveying direction of the closed conveyor line, wherein at least one of the multiple pole tab welding devices 23 is a spare pole tab welding device 23, that is, when other pole tab welding devices 23 fail, the spare pole tab welding device 23 can be used to replace the failed pole tab welding device 23, thereby realizing non-stop maintenance of the loop line.

[0091] like Figure 2 and Figure 3 As shown, the figure shows an example in which the number of the tab welding devices 23 is 5. Among them, the one located at the top of the figure is a spare device, and the other four are normal operation devices. Such an arrangement can effectively correspond to the above-mentioned two double-station feeding devices 21, so that the loop line can simultaneously process four battery cells 8 to be processed, thereby improving the production capacity of the loop line.

[0092] Preferably, if Figure 1 and Figure 2 As shown, the tab shaping unit may further include a first visual inspection unit 22, which is disposed between the feeding unit and the tab welding device 23, and is used to detect the folding of the tabs and diaphragms of the battery cells 8 to be processed, so as to inspect the battery cells 8 to be processed after the tab arrangement process is completed in the tab part, and record the numbers of the battery cells 8 to be processed that still have folded tabs and diaphragms after the tab arrangement, so as to facilitate their discharge in subsequent processes.

[0093] Optionally, the first visual inspection unit 22 and the second visual inspection unit 35 and the third visual inspection unit 37 described below may all be CCD cameras or other forms of image acquisition devices.

[0094] Preferably, the first visual inspection unit 22 may include two inspection viewing angles, which may be relatively arranged on two sides of the loading section 111 to respectively and correspondingly inspect the positive electrode tab and the negative electrode tab of the battery cell 8 to be processed.

[0095] Preferably, if Figure 1 and Figure 2 As shown, the tab shaping unit may further include a first flattening device 24, which is disposed downstream of the plurality of tab welding devices 23 as a whole, so as to flatten and shape the tabs of the battery cell 8 to be processed. The first flattening device 24 can flatten the deformed tabs after welding at the tab welding device 23 by a downward pressure, so as to facilitate the positioning of the tabs of the battery cell 8 to be processed in subsequent steps.

[0096] Preferably, not shown in the figure, the first flattening device 24 may include a driving member and a pressing block connected to each other, and the driving member can drive the pressing block to lift and press down to flatten the tab. Optionally, the driving member may be a cylinder, a linear motor, etc.

[0097] Preferably, the first flattening device 24 may include two pressing blocks, which may be relatively arranged on both sides of the loading section 111 to respectively flatten the positive and negative tabs of the battery cell 8 to be processed.

[0098] Preferably, if Figure 1 and Figure 2 As shown, the tab shaping unit may further include a trimming device 25, which is disposed downstream of the first flattening device 24 to trim excess portions of the tabs of the flattened battery cells 8 to be processed.

[0099] Preferably, not shown in the figure, the cutting device 25 may include a movable member and a cutter connected to each other, so that the movable member drives the cutter to perform the action of cutting the pole ear. Optionally, the movable member may be a cylinder, a linear motor or a manipulator. Optionally, the cutter may be a rotary cutter, a laser cutting head, etc.

[0100] Preferably, the cutting device 25 may include two cutters, which may be arranged oppositely on two sides of the loading section 111 to respectively detect the cutting of the positive and negative tabs of the battery cell 8 to be processed.

[0101] Preferably, if Figure 1 and Figure 2 As shown, the tab shaping unit may further include a first dust removal device 26, which is disposed downstream of the cutting device 25 and is used to remove cutting dust from the battery cells 8 to be processed.

[0102] Optionally, the first dust removal device 26 may be a negative pressure adsorption device to remove dust on the surface of the to-be-processed battery cell 8 by negative pressure adsorption. However, it is not limited thereto, and as long as the dust on the surface of the to-be-processed battery cell 8 can be removed, the first dust removal device 26 may also be other methods, such as electrostatic dust removal, mechanical sweeping, etc.

[0103] In an embodiment, Figure 1 and Figure 4 As shown, the first conveyor line body may further include a pre-welding section 112 , and the pre-welding section 112 may be connected to the downstream section of the feeding section 111 .

[0104] Similarly, the pre-welding section 112 can also extend in a straight line direction, and its beneficial effects are similar to those of the above-mentioned feeding section 111, which will not be described in detail. For ease of description, the extension direction of the pre-welding section 112 is defined as the second direction.

[0105] Preferably, the first direction intersects with the second direction so as to save space occupied by the loop line. Correspondingly, the first conveyor line body may further include a turning portion 116, and the feeding section 111 and the pre-welding section 112 may be connected via the turning portion 116, so as to rotate the mover 13 through the turning portion 116, thereby ensuring that the relative arrangement direction of the tabs of the battery cell 8 to be processed is always perpendicular to the closed conveyor line.

[0106] like Figure 1 As shown, the first direction may be perpendicular to the second direction, which is convenient for the rotational positioning of the steering portion 116 on the one hand, and convenient for saving the space occupied by the loop line on the other hand.

[0107] Optionally, the steering portion 116 may be a rotating disk driven by a rotating motor.

[0108] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit can be arranged in the pre-welding section 112. That is, the pre-welding unit is arranged downstream of the tab shaping unit to achieve pre-welding of the tab and the end plate of the battery cell 8 to be processed.

[0109] Preferably, if Figure 1 , Figure 4 and Figure 5 As shown, the pre-welding unit may include a first glue sticking device 31, which is arranged downstream of the tab shaping unit and is used to stick a first insulating glue 81 on the end of the battery cell 8 to be processed close to the closed conveyor line.

[0110] Alternatively, if Figure 1 and Figure 4As shown, the pre-welding unit may further include a second visual inspection unit 35 , which may be disposed between the tab shaping unit and the first glue sticking device 31 , and is used to inspect the tab cutting condition of the battery cell 8 to be processed.

[0111] It should be noted that, at each inspection station of the loop line (for example, the first visual inspection unit 22, the second visual inspection unit 35, the third visual inspection unit 37 described below, and the contour meter inspection unit 39 described below, etc.), if the inspection is qualified, the first gluing device 31 will perform the gluing process; if the inspection is unqualified, the subsequent processing process will be stopped until it flows to the outflow process of the loop line and is eliminated. In this way, deviations can be corrected in time, defective products can be discovered in time, and processing time and materials can be avoided from being wasted on defective products.

[0112] Preferably, there are multiple first gluing devices 31, and the multiple first gluing devices 31 are arranged in sequence along the conveying direction of the pre-welding section 112, wherein at least one of the multiple first gluing devices 31 is a spare first gluing device 31. When other first gluing devices 31 among the multiple first gluing devices 31 need to be replaced or repaired, the spare first gluing device 31 can be used to replace the first gluing device 31 that needs to be replaced or repaired, so that the loop line can be replaced and repaired without stopping, thereby further improving the loop line production capacity.

[0113] Alternatively, if Figure 5 As shown, the first glue sticking device 31 may include a first glue sticking portion 311 and a first slide portion 312 which are slidably connected to each other. The first slide portion 312 may extend in a direction perpendicular to the pre-welding section 112 so that the first glue sticking portion 311 can slide out of the pre-welding section 112 along the first slide to facilitate the glue changing operation.

[0114] Optionally, the first gluing unit 311 may include two straight-line high-speed gluing machines arranged opposite to each other in a direction perpendicular to the pre-welding section 112 , so that the first gluing device 31 can simultaneously apply the first insulating glue 81 to the positive and negative ears of the battery cell 8 to be processed.

[0115] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may further include a cover plate storage device 62 , and the cover plate storage device 62 is provided with a buffer space for storing the cover plates 82 .

[0116] Preferably, if Figure 1 and Figure 4 As shown, the cover plate storage device 62 can be arranged inside the space enclosed by the closed conveyor line, and the above-mentioned loading channel 14 can be connected to the cover plate storage device 62 to realize loading for the cover plate storage device 62 .

[0117] Optionally, the loop line may include an AGV vehicle that can pass through the above-mentioned loading channel 14 to realize the automation of loading the cover plate 82.

[0118] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may further include a cover plate loading device 61 , which may be disposed downstream of the first gluing device 31 to grab the cover plate 82 in the cover plate storage device 62 to a corresponding position of the mover 13 .

[0119] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may further include a second flattening device 36, which is disposed between the first glue sticking device 31 and the cover plate feeding device 61 described below, and is used to flatten the first insulating glue 81 so that the first insulating glue 81 is evenly attached to the to-be-processed battery cell 8. The structure and principle of the second flattening device 36 are similar to those of the first flattening device 24 described above, and are not described in detail herein.

[0120] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit can also include a third visual inspection unit 37, which is arranged between the second flattening device 36 and the cover plate feeding device 61 to detect the adhesion quality of the first insulating glue 81, thereby facilitating the identification and recording of defective products produced by the first gluing device 31 process.

[0121] Preferably, if Figure 1 and Figure 4 As shown, the cover plate loading device 61 may include a cover plate gripper 611 and a cover plate loading station 613. The cover plate loading station 613 is arranged on the pre-welding section 112 and downstream of the first gluing device 31. When the mover 13 enters the cover plate loading station 613, the cover plate gripper 611 can place the cover plate 82 in the cover plate storage device 62 at a predetermined position of the mover 13.

[0122] Preferably, if Figure 1 and Figure 4 As shown, the plate feeding device 21 may further include a cover plate coding unit 612, which is disposed between the cover plate storage device 62 and the cover plate feeding station 613 to mark the cover plate 82. Optionally, the cover plate coding unit 612 may be a laser marking machine, a labeling machine, or the like.

[0123] Preferably, if Figure 1 and Figure 4As shown, the above-mentioned cover plate 82 is only the cover plate 82 corresponding to the polarity of the pole ear of the battery cell 8 to be processed located on the inner side of the closed conveyor line on the mover 13. In this way, on the one hand, it is not only convenient for the cover plate loading device 61 located on the inner side to load materials, but also convenient for saving space and avoiding the arrangement of two sets of cover plate loading devices 61 and cover plate storage devices 62; on the other hand, the placement quality is guaranteed to avoid the loss of the cover plate 82 of one polarity due to poor assembly of the cover plate 82 of another polarity, thereby avoiding material waste.

[0124] like Figures 4 to 6 , shows an example in which the polarity of the tab of the to-be-processed battery cell 8 located inside the closed conveyor line is negative, and correspondingly, the cover plate 82 stored in the cover plate storage device 62 is a negative cover plate. However, it is not limited thereto, and the polarity of the tab of the to-be-processed battery cell 8 located inside the closed conveyor line can also be positive.

[0125] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may further include a first outflow station for moving defective products upstream of the first outflow station out of the closed conveying line.

[0126] Preferably, if Figure 1 and Figure 4 As described above, the above-mentioned first outflow station may include a first defective product storage section 63, which is arranged downstream of the third visual inspection section 37 and on one side of the cover plate storage device 62. On the one hand, it is used to store defective products flowing out of the first outflow station; on the other hand, the first defective product storage section 63 is arranged on one side of the cover plate storage device 62, so as to facilitate the AGV car that completes the loading of the cover plate 82 to transport the defective products out of the loop.

[0127] Alternatively, if Figure 1 and Figure 4 As shown, the grabbing range of the cover gripper 611 can cover the first defective product storage section 63, so that the defective products can be grabbed to the first defective product storage section 63 by the cover gripper 611, so as to save the cost of the loop equipment.

[0128] Alternatively, if Figure 1 and Figure 4 As shown, the first outflow station may also include a first defective product robot, so that the defective products can be directly caught by the first defective product robot and placed in the first defective product storage section 63, thereby effectively improving the loop line production efficiency.

[0129] Preferably, if Figure 1 and Figure 4As shown, the pre-welding unit may include a cover plate pre-welding device 33, which is arranged downstream of the cover plate feeding device 61, and is used to weld the pole ears of the battery cell 8 to be processed to the cover plate 82, so as to realize the pre-welding process of the cover plate 82 and the battery cell 8 to be processed.

[0130] Preferably, the cover plate pre-welding device 33 may be a laser welder to ensure the welding accuracy between the cover plate 82 and the tab.

[0131] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may include a second glue sticking device 34 disposed downstream of the cover plate pre-welding device 33 to cover the second insulating glue 83 on the welds between the battery cell 8 to be processed and the cover plate 82 .

[0132] like Figure 6 As shown, the second glue sticking device 34 may also include a second glue sticking portion and a second slide portion. The arrangement and arrangement principle of the second glue sticking device 34 are similar to those of the first glue sticking device 31, and will not be described in detail.

[0133] It should be noted that the second gluing unit may be provided with a straight-line high-speed gluing machine only on one side of the pre-welding section 112 where the cover plate feeding device 61 is located, so as to correspond to the welds between the battery cell 8 to be processed and the cover plate 82 .

[0134] Preferably, if Figure 1 and Figure 4 As shown, there are multiple second gluing devices 34, and the multiple second gluing devices 34 are arranged in sequence along the conveying direction of the closed conveying line, wherein at least one of the multiple second gluing devices 34 is a spare second gluing device 34, and the beneficial effect is similar to that of the above-mentioned first gluing device 31, which will not be repeated.

[0135] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may further include a second dust removal device 38, which is disposed downstream of the cover plate pre-welding device 33 and upstream of the second glue sticking device 34 described below, to remove processing dust from the to-be-processed battery cell 8. The dust removal principle and structure of the second dust removal device 38 are similar to those of the first dust removal device 26, and will not be described in detail.

[0136] Preferably, if Figure 1 and Figure 4 As shown, the pre-welding unit may further include a profilometer detection 39 , which is disposed between the second dust removal device 38 and the second glue sticking device 34 , and is used to detect the weld quality of both the battery cell 8 to be processed and the cover plate 82 .

[0137] Preferably, if Figure 1 and Figure 4As shown, the pre-welding unit may further include a fourth visual inspection unit 32 , which is disposed downstream of the second glue sticking device 34 and is used to inspect the sticking quality of the second insulating glue 83 .

[0138] In an embodiment, preferably, Figure 1 and Figure 7 As shown, the first conveyor line body may further include a material unloading section 113, and the material unloading unit is disposed in the material unloading section 113. The material unloading section 113 and the material loading section 111 may be disposed on the same side of the pre-welding section 112, so as to form a loop; and the material unloading section 113 and the material loading section 111 are respectively connected to the downstream end and the upstream section of the pre-welding section 112, so as to facilitate the battery cell pre-welding production loop line to flow the processed finished products to the subsequent process along the second direction.

[0139] Similarly, the unloading section 113 can also extend in a straight line direction, and its beneficial effects are similar to those of the loading section 111, which will not be described in detail. For ease of description, the extension direction of the pre-welding section 112 is defined as the third direction.

[0140] Preferably, the third direction may also intersect with the second direction to save the space occupied by the loop line. Correspondingly, the blanking section 113 and the pre-welding section 112 may also be connected via the steering portion 116, so as to rotate the mover 13 through the steering portion 116, thereby ensuring that the relative arrangement direction of the tabs of the battery cell 8 to be processed is always perpendicular to the closed conveyor line.

[0141] Preferably, if Figure 1 As shown, the third direction is parallel to the first direction so as to save the space occupied by the loop line.

[0142] Preferably, if Figure 1 and Figure 7 As shown, the unloading unit may include a third dust removal device 41, which is arranged downstream of the pre-welding unit and is used to remove dust from the upper surface of the to-be-processed battery cell 8. The third dust removal device 41 is similar in arrangement and dust removal principle to the first dust removal device 26, and will not be described in detail.

[0143] Preferably, if Figure 1 and Figure 7 As shown, the unloading unit may further include a fifth visual inspection unit 42, which is disposed downstream of the third dust removal device 41 and is used to inspect the upper surface quality of the battery cell 8 to be processed. The fifth visual inspection unit 42 is similar to the first visual inspection unit in terms of the arrangement and the detection principle, and will not be described in detail.

[0144] Preferably, if Figure 1 and Figure 7As shown, the above-mentioned unloading unit may also include a lower surface dust removal detection station 43. Specifically, not shown in the figure, the lower surface dust removal detection station 43 may include a lifting gripper, a fourth dust removal device and a sixth visual inspection. The battery cell 8 to be processed flowing into the lower surface dust removal detection station 43 can be lifted by the lifting gripper to be separated from the mover 13. At this time, the fourth dust removal device and the sixth visual inspection perform dust removal and quality inspection on the lower surface of the battery cell 8 to be processed in turn. After completion, the lifting gripper puts the battery cell 8 to be processed back to the corresponding mover 13.

[0145] Optionally, the lifting gripper may be a manipulator or other lifting devices. The fourth dust removal device and the sixth visual detection device may be arranged below the conveying plane of the mover 13 to collect the lower surface information of the battery cell 8 to be processed.

[0146] Preferably, if Figure 1 and Figure 7 As shown, the above-mentioned unloading unit can also include an unloading outflow device 452 for placing and / or transporting qualified battery cells 8 to be processed.

[0147] Alternatively, if Figure 7 As shown, the material discharge device 452 may be a conveyor line extending along the second direction, so as to facilitate the flow of qualified battery cells 8 to be processed to the downstream process.

[0148] However, it is not limited thereto, and the material discharge device 452 may also be a storage rack, an AGV transport vehicle or other storage and transportation devices.

[0149] Preferably, if Figure 1 and Figure 7 As shown, the above-mentioned unloading unit can also include an unloading grabbing device 451 to grab the qualified battery cells 8 to be processed and send them to the outflow device.

[0150] Preferably, if Figure 1 and Figure 7 As shown, the above-mentioned unloading unit can also include an unloading testing device 453, which can be arranged on the unloading outflow device 452, and is used to detect the electrical connection quality of the qualified battery cells 8 to be processed.

[0151] Optionally, the blanking test device 453 may include a Hipot test device.

[0152] Alternatively, if Figure 1 and Figure 7As shown, the above-mentioned unloading unit may also include a code scanning and troubleshooting device 44, which may be arranged between the lower surface dust removal detection station 43 and the unloading grabbing device 451, and is used to identify the code of the mover 13, the code of the cover plate 82, and the code of the battery cell 8 to be processed, so as to facilitate troubleshooting of the loop process. Optionally, the code scanning and troubleshooting device 44 may include multiple code scanning guns.

[0153] In an embodiment, Figure 1 and Figure 8 As shown, the first conveyor line body may further include a second fixture return section 115. The second fixture return section 115 connects the downstream end of the unloading section 113 and the upstream section of the second conveyor line body 12 to enable the mover 13 to flow into the second conveyor line body 12.

[0154] Preferably, if Figure 1 As shown, the extension direction of the second conveyor line 12 and the extension direction of the second fixture return section 115 can both extend along the second direction. Correspondingly, the second fixture return section 115 and the material discharge section 113 can also be connected via the turning portion 116 .

[0155] Preferably, if Figure 1 and Figure 8 As shown, the second fixture reflow section 115 may also be provided with a second outflow station 51 for use as an outflow station to move defective products upstream of the second outflow station 51 out of the loop.

[0156] Similarly, if Figure 1 and Figure 8 As shown, the second outflow station 51 may include a second defective product robot 511 and a second defective product storage section 512 , so that the defective product robot 13 can be caught by the second defective product robot 511 and placed in the second defective product storage section 512 .

[0157] Preferably, if Figure 1 and Figure 8 As shown, the second jig return section 115 may also be provided with a mover maintenance station 52 and a mover 13 gripper, the mover 13 maintenance station being provided on one side of the second jig return section 115, and the mover 13 gripper being able to grab the faulty mover 13 to the second jig return section 115 to the maintenance station, so as to facilitate the maintenance of the mover 13. Optionally, the mover 13 gripper may be a manipulator.

[0158] In an embodiment, Figure 1 and Figure 8 As shown, the first conveyor line body may further include a first fixture return section 114. The first fixture return section 114 connects the downstream end of the second conveyor line body 12 and the upstream end of the loading section 111 to enable the mover 13 to return to the loading section 111.

[0159] Preferably, if Figure 1 As shown, the extension direction of the first jig reflux section 114 can also extend along the second direction. Correspondingly, the first jig reflux section 114 and the feeding section 111 can also be connected via the turning portion 116 .

[0160] Preferably, if Figure 1 and Figure 8 As mentioned above, the first jig return section 114 may also be provided with a fifth dust removal device 7 for removing dust from the mover 13 .

[0161] The embodiment of the second aspect of the present application also provides a battery production system, including the battery cell pre-welding production loop line described in any of the above embodiments, and thus has all the beneficial technical effects of the battery cell pre-welding production loop line, which will not be repeated here.

[0162] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cell pre-welding production loop line, characterized in that: It includes a magnetic suspension transport loop, a loading unit, a tab shaping unit, a pre-welding unit and a unloading unit; The magnetic suspension transport loop line includes a first conveying line body, a second conveying line body and at least two lifting parts, the second conveying line body is arranged at a higher height than the first conveying line body, and two ends of the second conveying line body are respectively connected to two ends of the first conveying line body via the lifting parts, so that the first conveying line body and the second conveying line body are enclosed to form a closed conveying line, and the position of the closed conveying line located below the second conveying line body forms a loading channel that can enter the space enclosed by the closed conveying line; The closed conveyor line can sequentially convey the battery cells to be processed among the loading unit, the tab shaping unit, the pre-welding unit and the unloading unit.

2. The battery cell pre-welding production loop line according to claim 1, characterized in that: The magnetic suspension transport loop line also includes a mover for carrying the battery core to be processed; In a conveying direction perpendicular to the closed conveying line, the size of the mover is larger than the line width of the closed conveying line, so that both ends of the mover extend beyond the line of the closed conveying line; When the battery cell to be processed is arranged on the mover, the positive electrode and the negative electrode of the battery cell to be processed are arranged opposite to each other in a conveying direction perpendicular to the closed conveying line.

3. The battery cell pre-welding production loop line according to claim 1, characterized in that: The loading unit includes a loading device, which includes a grabbing portion and at least two pole-pulling ears. The grabbing portion is used to grab the battery cell to be processed onto the closed conveyor line. The pole-pulling ears are arranged on both sides of the line body of the closed conveyor line to arrange the pole ears of the battery cell to be processed on the closed conveyor line.

4. The battery cell pre-welding production loop line according to claim 1, characterized in that: The tab shaping unit is arranged downstream of the feeding unit, and the tab shaping unit comprises a tab welding device for welding and fixing the tabs of the battery cell to be processed.

5. The battery cell pre-welding production loop line according to claim 4, characterized in that: There are multiple pole tab welding devices, and the multiple pole tab welding devices are arranged in sequence along the conveying direction of the closed conveyor line, wherein at least one of the multiple pole tab welding devices is a spare pole tab welding device; And / or, the tab shaping unit further comprises: A first visual inspection unit is provided between the feeding unit and the tab welding device to detect the folding of the tabs and diaphragms of the battery cell to be processed; A first flattening device is arranged downstream of the plurality of tab welding devices as a whole to flatten and shape the tabs of the battery cell to be processed; A cutting device, disposed downstream of the first flattening device, to cut the flattened and shaped tabs of the battery cell to be processed; The first dust removal device is arranged downstream of the cutting device and is used to remove the cutting dust of the battery cell to be processed.

6. The battery cell pre-welding production loop line according to claim 1, characterized in that: The pre-welding unit is arranged downstream of the tab shaping unit, and the pre-welding unit comprises: A first glue sticking device, disposed downstream of the tab shaping unit, for sticking a first insulating glue on the end of the battery cell to be processed close to the closed conveyor line; The cover plate storage device is provided with a buffer space for storing the cover plates; A cover plate feeding device, arranged downstream of the first gluing device, to grab the cover plates in the cover plate storage device to the corresponding position of the closed conveyor line; A cover plate pre-welding device, disposed downstream of the cover plate feeding device, for welding the tabs of the battery cell to be processed to the cover plate; The second glue sticking device is arranged downstream of the cover plate pre-welding device to cover the welds between the battery cell to be processed and the cover plate with a second insulating glue.

7. The battery cell pre-welding production loop line according to claim 6, characterized in that: There are multiple first gluing devices, and the multiple first gluing devices are arranged in sequence along the conveying direction of the closed conveying line, wherein at least one of the multiple first gluing devices is a spare first gluing device; And / or, there are multiple second gluing devices, and the multiple second gluing devices are arranged in sequence along the conveying direction of the closed conveying line, wherein at least one of the multiple second gluing devices is a spare second gluing device; And / or, the cover plate storage device is arranged inside the space enclosed by the closed conveyor line, and the loading channel can be connected to the cover plate storage device; And / or, the pre-welding unit further comprises: A second visual inspection unit is provided between the tab shaping unit and the first glue sticking device, and is used to inspect the tab cutting condition of the battery cell to be processed; A second flattening device, disposed between the first glue sticking device and the cover plate feeding device, for flattening the first insulating glue so that the first insulating glue is evenly attached to the battery cell to be processed; A third visual inspection unit, disposed between the second flattening device and the cover plate feeding device, for inspecting the first insulating adhesive attachment quality; A first outflow station, comprising a defective product storage unit and a manipulator, wherein the first outflow station is arranged downstream of the third visual inspection unit and on one side of the cover plate storage device to move defective products upstream of the first outflow station out of the closed conveyor line; A second dust removal device is provided between the cover plate pre-welding device and the second glue sticking device, and is used to remove processing dust of the battery cell to be processed; A profilometer is provided between the second dust removal device and the second glue sticking device to detect the quality of the weld between the battery cell to be processed and the cover plate; The fourth visual inspection is arranged downstream of the second gluing device and is used to inspect the attachment quality of the second insulating glue.

8. The battery cell pre-welding production loop line according to claim 1, characterized in that: The unloading unit comprises: A third dust removal device is arranged downstream of the pre-welding unit and is used to remove dust from the upper surface of the battery cell to be processed; A fifth visual inspection unit, disposed downstream of the third dust removal device, for inspecting the upper surface quality of the battery cell to be processed; The lower surface dust removal inspection station includes a lifting gripper, a fourth dust removal device and a sixth visual inspection. The battery cell to be processed that flows into the lower surface dust removal inspection station can be lifted by the lifting gripper to be separated from the mover. At this time, the fourth dust removal device and the sixth visual inspection sequentially perform dust removal and quality inspection on the lower surface of the battery cell to be processed. After completion, the lifting gripper puts the battery cell to be processed back to the corresponding mover; A material discharge device, used for placing and / or transferring the qualified battery cells to be processed; The unloading grabbing device grabs the qualified battery cells to be processed and transfers them to the outflow device.

9. The battery cell pre-welding production loop line according to claim 1, characterized in that: The first conveyor line body comprises a first jig reflow section, a loading section, a pre-welding section, a unloading section, and a second jig reflow section which are connected in sequence; The feeding unit and the tab shaping unit are arranged in the feeding section, the pre-welding unit is arranged in the pre-welding section, the unloading unit is arranged in the unloading section, and the second conveyor line connects one end of the first jig reflow section away from the feeding section and one end of the second jig reflow section away from the unloading section; And / or, the conveying directions of the first jig reflow section, the loading section, the pre-welding section, the unloading section and the second jig reflow section are all straight lines, the first conveying line further comprises a turning portion, and the first jig reflow section and the loading section, the loading section and the pre-welding section, the pre-welding section and the unloading section, and the unloading section and the second jig reflow section are all connected via the turning portion; And / or, the first jig reflux section is further provided with a fifth dust removal device for removing dust from the mover; And / or, the second fixture reflow section is further provided with a second outflow station, which is used for the outflow station to move defective products upstream of the second outflow station out of the closed conveyor line.

10. A battery production system, characterized in that: A battery cell pre-welding production loop comprising any one of claims 1 to 9.

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