Cylindrical battery automatic assembly line and production process thereof

Abstract

The application provides a cylindrical battery automatic assembly line and a production process thereof. The cylindrical battery automatic assembly line is formed with a first production station, a second production station, a third production station, a fourth production station, a fifth production station and a sixth production station. A cell main conveying line sequentially passes through a first production device, a second production device, a third production device, a fourth production device, a fifth production device and a sixth production device in the cylindrical battery automatic assembly line. Through the multiple production devices, negative current collecting plates of the cells are welded, the cells are put into shells, outer insulation sheets are fed, cell locking nuts are performed, nuts and cell pole columns are welded, positive current collecting plates are welded, sealing nails are welded, cell films are sleeved and cell detection is performed, so that the automatic, efficient and accurate production of the cylindrical battery is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cylindrical battery production, in particular to a cylindrical battery automatic assembly line and a production process thereof. BACKGROUND

[0002] The statements herein are provided only to complement the background of the present application and are not necessarily prior art.

[0003] There are various types of batteries on the market, and their structures are different. Some batteries are designed with studs on the cylindrical battery core. During the battery production process, nuts need to be locked into the studs.

[0004] For the processing of such batteries, in the existing processing procedure, the stations are often scattered in different workshops. The parts of the upstream procedure are stored after being processed and then transported to the downstream procedure for processing. During the storage and transportation process, the parts are prone to collision and damage, increasing the probability of generating defective products and waste products, and the production efficiency is low. SUMMARY

[0005] The main purpose of the present application is to provide a cylindrical battery automatic assembly line and a production process thereof with low defective product rate and high production efficiency.

[0006] To achieve the above purpose, the technical solution of the present application is as follows: a cylindrical battery automatic assembly line, which is sequentially formed with a first production station, a second production station, a third production station, a fourth production station, a fifth production station and a sixth production station along the processing direction of the battery core, and comprises:

[0007] A battery core main conveying line sequentially passes through the first production station, the second production station, the third production station, the fourth production station, the fifth production station and the sixth production station, and is used to convey the semi-finished product of the battery core.

[0008] A first production device is arranged at the first production station and is used to weld the negative current collector of the battery core.

[0009] A second production device is arranged at the second production station and is used to put the battery core into the shell, sequentially load the outer insulating sheet to the negative electrode of the battery core, lock the nut into the negative electrode stud of the battery core, and weld the nut and the negative electrode stud of the battery core.

[0010] A third production device is arranged at the third production station and is used to weld the positive current collector of the battery core.

[0011] A fourth production device is arranged at the fourth production station and is used to clean the liquid injection hole of the battery core and weld the sealing nail to the liquid injection hole of the battery core.

[0012] A fifth production device is arranged at the fifth production station and is used for cleaning the surface of the battery cell and sleeving a film on the surface of the battery cell.

[0013] A sixth production device is arranged at the sixth production station and is used for quality detection of the battery cell.

[0014] A production process of a cylindrical battery based on the cylindrical battery automatic assembly line comprises the following steps:

[0015] The negative current collector plate is welded to the negative electrode of the battery cell by the first production device.

[0016] After the battery cell with the welded negative current collector plate is put into the shell, the outer insulation sheet is sequentially fed to the negative electrode end of the battery cell, the nut is locked on the negative electrode post of the battery cell, and the nut is welded to the negative electrode post of the battery cell by the second production device.

[0017] The positive current collector plate is welded to the positive electrode of the battery cell with the welded nut by the third production device.

[0018] The battery cell with the welded positive current collector plate is cleaned and the sealing nail is welded to the battery cell injection hole by the fourth production device.

[0019] The surface of the battery cell with the welded sealing nail is cleaned and the film is sleeved on the surface of the battery cell by the fifth production device.

[0020] The battery cell with the sleeved film is detected by the sixth production device.

[0021] The beneficial effects of the present application are embodied in:

[0022] The first production device, the second production device, the third production device, the fourth production device, the fifth production device and the sixth production device are sequentially arranged along the main battery cell conveying line, the main battery cell conveying line connects the plurality of production devices to realize the welding of the negative current collector plate of the battery cell, the battery cell into the shell, the feeding of the outer insulation sheet, the locking of the nut of the battery cell, the welding of the nut and the electrode post of the battery cell, the welding of the positive current collector plate, the welding of the sealing nail, the sleeving of the film of the battery cell and the detection of the battery cell, so that the automatic, efficient and precise production of the cylindrical battery is realized, the number of transfer of parts between different production lines and different production workshops is effectively reduced, and the probability of defective products and waste products caused by transfer is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0023] In the drawings:

[0024] Figure 1 It is a production process schematic diagram of the cylindrical battery automatic assembly line;

[0025] Figure 2 It is a structure layout diagram of the first production device.

[0026] Figure 3 is a partial enlarged view of the first production device described in the present application;

[0027] Figure 4 is a structural layout view of the negative current collector plate welding unit described in the present application;

[0028] Figure 5 is a structural schematic view of the first material taking component described in the present application;

[0029] Figure 6 is a structural layout view of the battery cell transfer tooling described in the present application;

[0030] Figure 7 is a structural layout view of the negative current collector plate turnover component described in the present application;

[0031] Figure 8 is a structural layout view of the negative current collector plate pressing tooling described in the present application;

[0032] Figure 9 is a structural layout view of the negative current collector plate welding assembly described in the present application;

[0033] Figure 10 is a structural layout view of the negative electrode insulation sheet unit described in the present application;

[0034] Figure 11 is a Figure 10 enlarged view of A in the figure;

[0035] Figure 12 is a structural layout view of the second production device described in the present application;

[0036] Figure 13 is a structural layout view of the shell loading assembly described in the present application;

[0037] Figure 14 is a structural layout view of the vertical shell entering assembly described in the present application;

[0038] Figure 15 is a structural layout view of the outer insulation sheet loading unit described in the present application;

[0039] Figure 16 is a structural layout view of the guide assembly described in the present application;

[0040] Figure 17 is a structural layout view of the battery cell screw locking unit described in the present application;

[0041] Figure 18 is a structural layout view of the nut feeding unit described in the present application;

[0042] Figure 19Structure layout diagram of the material distribution assembly in the application;

[0043] Figure 20 Structure layout diagram of the third production device in the application;

[0044] Figure 21 Structure layout diagram of the pre-spot welding unit and full welding unit in the application;

[0045] Figure 22 Structure layout diagram of the positive current collector plate transfer assembly in the application;

[0046] Figure 23 Structure layout diagram of the fourth production device in the application;

[0047] Figure 24 Structure layout diagram of the fifth production device in the application;

[0048] Figure 25 Stereoscopic view of the sleeve film unit in the application;

[0049] Figure 26 Structure view of the film guide shaft in the application;

[0050] Figure 27 Structure layout diagram of the sixth production device in the application;

[0051] Figure 28 Structure schematic diagram of the moving mechanism in the application;

[0052] Figure 29 Structure schematic diagram of the turnover mechanism in the application;

[0053] Figure 30 Flowchart of the production process of the cylindrical battery cell provided by the application.

[0054] Explanation of reference signs:

[0055] 1, main battery cell conveying line;

[0056] 2, first production device; 21, first cell conveying line; 22, first feeding unit; 23, negative electrode current collector disc feeding unit; 24, negative electrode insulation sheet feeding unit; 25, negative electrode current collector disc welding unit; 26, first detection unit; 27, positive electrode coating unit; 28, cell turning unit; 29, negative electrode insulation sheet pasting unit; 201, negative electrode coating unit; 202, cell coating collection unit; 203, first discharging unit; 204, first rejecting unit; 251, cell transfer tool; 2511, first connecting disc; 25111, first welding part; 25112, first buffer part; 2512, second connecting disc; 25121, second welding part; 25122, second buffer part; 252, negative electrode current collector disc pressing tool; 2521, negative electrode current collector disc pressing head; 2522, pressing mechanism; 253, negative electrode current collector disc feeding tool; 2531, first material taking part; 52311, Y-axis sliding table; 25312, Z-axis sliding table; 25313, bearing table; 25314, first picking part; 2532, negative electrode current collector disc positioning part; 2533, negative electrode current collector disc distributing part; 2534, negative electrode current collector disc overturning part; 254, negative electrode current collector disc welding assembly; 2541, second sliding table; 2542, progressive sliding table; 2543, galvanometer welding head; 2544, distance measuring sensor; 261, first post-welding visual detection part; 262, short circuit detection part; 291, negative electrode insulation sheet pressing tool; 2911, negative electrode insulation sheet pressing head; 292, negative electrode insulation sheet feeding tool; 2921, second material taking part; 2922, primary positioning part; 2923, negative electrode insulation sheet distributing part; 2924, negative electrode insulation sheet overturning part; 2925, secondary positioning part;

[0057] 3, second production device; 31, second cell conveying line; 32, shell conveying line; 321, shell carrier; 33, second feeding unit; 34, outer insulation sheet feeding unit; 35, nut feeding unit; 36, cell shell entering unit; 37, outer insulation sheet feeding unit; 38, cell screw locking unit; 39, screw welding unit; 301, pre-welding visual detection part; 302, second post-welding visual detection part; 303, second discharging unit; 351, nut vibrating disc; 352, nut conveying plate; 3521, nut conveying groove; 361, shell feeding assembly; 362, vertical shell entering assembly; 3621, cell feeding part; 3622, cell pushing part; 3623, shell positioning part; 371, outer insulation sheet transfer assembly; 372, guide assembly; 3721, guide bushing; 3722, jacking rod; 381, distributing assembly; 3811, fixed frame; 3812, first lifting part; 3813, movable frame; 3814, multiple connecting plates; 3815, second lifting part; 3816, positioning column; 382, tightening assembly;

[0058] 4, third production device; 41, third cell conveying line; 42, third feeding unit; 43, positive current collector disc feeding unit; 44, pre-point welding unit; 45, full welding unit; 46, penetration welding unit; 47, edge rolling unit; 48, third detection unit; 49, third discharging unit; 441, positive current collector disc transfer assembly; 442, pre-point welding device; 4411, carrying part; 4412, positioning part; 4413, overturning part; 481, 3D scanning weld seam device; 482, post-welding visual detection device; 483, short circuit detection device;

[0059] 5, fourth production device; 51, fourth cell conveying line; 52, fourth feeding unit; 53, first cleaning unit; 54, sealing pin feeding unit; 55, sealing pin welding unit; 56, code printing unit; 57, fourth detection unit; 58, fourth discharging unit; 59, fourth rejection unit; 511, cell carrier; 571, 2D visual detection device; 572, 3D visual detection device;

[0060] 6, fifth production device; 61, fifth cell conveying line; 62, fifth feeding unit; 63, second cleaning unit; 64, fifth detection unit; 65, fifth rejection unit; 66, film sleeving unit; 67, fifth discharging unit; 631, end face cleaning mechanism; 632, cylindrical surface cleaning mechanism; 661, tray; 662, feeding wheel; 663, film guiding shaft; 6631, shaft head; 6632, guiding cylinder; 6633, return element; 6634, guiding wheel; 6635, magnetic ring; 664, cutter; 665, clamping part; 6651, fourth driving unit; 6652, fifth driving unit; 666, pressing part;

[0061] 7, sixth production device; 71, sixth cell conveying line; 72, sixth feeding unit; 73, code scanning unit; 74, code printing unit; 75, end face detection unit; 76, length detection unit; 77, film sleeving detection unit; 78, diameter detection unit; 79, weighing unit; 701, sixth rejection unit; 702, sixth discharging unit;

[0062] 8, overturning mechanism; 81, cell positioning block; 82, extrusion block; 83, first driving unit; 84, second driving unit;

[0063] 9, moving mechanism; 91, first grabbing part; 92, second grabbing part. DETAILED DESCRIPTION

[0064] The application will be described in further detail below with reference to the drawings and embodiments. It is apparent that the described embodiments are only a part of the embodiments of the application, and not all the embodiments. The embodiments in the application and the features in the embodiments can be combined with each other without conflict. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application.

[0065] Referring to Figure 1 , the application discloses an automatic assembly line for cylindrical batteries, which is sequentially provided with a first production station, a second production station, a third production station, a fourth production station, a fifth production station and a sixth production station along a processing direction of an electric core, and comprises:

[0066] an electric core main conveying line 1 sequentially passing through the first production station, the second production station, the third production station, the fourth production station, the fifth production station and the sixth production station, and on which the electric core is located in a vertical posture to convey a semi-finished product of the electric core;

[0067] a first production device 2 arranged at the first production station to perform negative current collector welding on the electric core; a second production device 3 arranged at the second production station to perform shell insertion on the electric core, and sequentially perform outer insulation sheet feeding to a negative electrode end of the electric core, nut locking on a negative electrode pole of the electric core and nut welding on the negative electrode pole of the electric core; a third production device 4 arranged at the third production station to perform positive current collector welding on the electric core; a fourth production device 5 arranged at the fourth production station to perform electric core liquid injection hole cleaning and sealing pin welding on the electric core liquid injection hole; a fifth production device 6 arranged at the fifth production station to perform electric core surface cleaning and thin film sleeving on the electric core surface; and a sixth production device 7 arranged at the sixth production station to perform electric core end face, length, diameter and weight detection. In the scheme, the first production device 2, the second production device 3, the third production device 4, the fourth production device 5, the fifth production device 6 and the sixth production device 7 are sequentially arranged along the electric core main conveying line 1, and the electric core main conveying line 1 connects the multiple production devices to perform negative current collector welding, shell insertion, outer insulation sheet feeding, electric core nut locking, nut and electric core pole welding, positive current collector welding, sealing pin welding, electric core film sleeving and electric core detection on the electric core, so as to realize automatic, efficient and accurate production of the cylindrical battery, effectively reduce the number of times of transferring the parts between different production lines and different production workshops, and reduce the probability of generating defective products and waste products due to the transfer.

[0068] The cylindrical battery automatic assembly line provided by the scheme is used for processing and detecting cylindrical battery cells. According to a process flow, negative electrode current collector plate welding, cell shell insertion, outer insulating sheet feeding, cell nut locking, nut and cell pole post welding, positive electrode current collector plate welding, first helium detection, post-helium detection liquid injection, injection hole sealing pin welding, cell disc dismounting, current collector disc dismounting and the like are sequentially completed. After sealing welding, some other process equipment (for example, detection, formation) and the like are further provided. Then, the cell is sleeved with a film and appearance detection is performed. After appearance detection, a finished battery is obtained. Finally, the battery is packaged, and the battery is collected and packed into a box.

[0069] As shown in Figures 2 to 11 The first production device 2 is formed with a negative electrode current collector plate welding station, a first detection station, a positive electrode rubber coating station, a negative electrode insulating sheet pasting station, a negative electrode rubber coating station and a cell rubber collecting station. The first production device 2 comprises: a first cell conveying line 21 located on one side of the cell main conveying line 1. The first cell conveying line 21 sequentially passes through the negative electrode current collector plate welding station, the first detection station, the positive electrode rubber coating station, the negative electrode insulating sheet pasting station, the negative electrode rubber coating station and the cell rubber collecting station, and is used to convey the cell. A first feeding unit 22 comprises a first turnover feeding component, which is used to turn the vertical cell on the cell main conveying line 1 into a horizontal type and longitudinally arrange the cell on the first cell conveying line 21. A negative electrode current collector plate feeding unit 23 is a negative electrode current collector plate feeding conveying line located on one side of the first cell conveying line 21, and is used to convey the negative electrode current collector plate to the negative electrode current collector plate welding station. Preferably, the negative electrode current collector plate feeding conveying line is arranged on the lower side of the cell main conveying line 1 close to the first cell conveying line 21, so as to improve the space utilization rate.

[0070] The structure of the cell conveying line and the feeding conveying line used in the present application can be various, for example, it can be in the form of a belt conveying line, or it can be in the form of a magnetic suspension conveying line. The specific structure of the present application embodiment is not limited. Preferably, the magnetic suspension conveying line is selected in the present application. The magnetic suspension conveying line has the advantages of fast and accurate positioning. A negative electrode insulating sheet feeding unit 24 is used to convey the negative electrode insulating sheet to the negative electrode insulating sheet pasting station. Specifically, the negative electrode insulating sheet feeding unit 24 can adopt a negative electrode insulating sheet cutting device. The negative electrode insulating sheet cutting device comprises an insulating sheet unwinding module, an insulating sheet punching mechanism, an insulating sheet feeding and transferring mechanism, an insulating sheet storage bin and an insulating sheet discharging and transferring mechanism. The insulating sheet unwinding module is used to unwind the insulating sheet raw material. The insulating sheet punching mechanism is used to punch the insulating sheet raw material to obtain the insulating sheet. The insulating sheet feeding and transferring mechanism is used to transfer the punched insulating sheet to the insulating sheet storage bin. The insulating sheet discharging and transferring mechanism is used to transfer the insulating sheet placed in the insulating sheet storage bin to the negative electrode current collector plate welding station. In addition, the negative electrode insulating sheet feeding unit 24 can also be a negative electrode insulating sheet feeding conveying line, which is used to convey the negative electrode insulating sheet to the negative electrode insulating sheet pasting station.

[0071] The negative electrode current collector plate welding unit 25 is arranged at the negative electrode current collector plate welding station and includes a battery cell transfer tool 251, a negative electrode current collector plate pressing tool 252, a negative electrode current collector plate feeding tool 253, and a negative electrode current collector plate welding assembly 254. The battery cell transfer tool 251 is switchable between the first battery cell conveying line 21 and the negative electrode current collector plate pressing tool 252, and is used to transfer the battery cell to be welded to the corresponding negative electrode current collector plate pressing tool 252, and to transfer the battery cell welded by the negative electrode current collector plate pressing tool 252 back to the first battery cell conveying line 21. The negative electrode current collector plate pressing tool 252 is used to place the negative electrode current collector plate and press the negative electrode current collector plate to the end of the battery cell. The negative electrode current collector plate feeding tool 253 is used to provide the negative electrode current collector plate to the negative electrode current collector plate pressing tool 252. The negative electrode current collector plate welding assembly 254 is used to weld the negative electrode current collector plate pressed to the end of the battery cell.

[0072] The first detection unit 26 is arranged at the first detection station and is used to visually detect and short-circuit detect the end of the battery cell after the negative electrode current collector plate welding. Specifically, the first detection unit 26 includes a first post-weld visual detection component 261 and a short-circuit detection component 262, which are arranged in sequence along the conveying direction of the first battery cell conveying line 21. The first post-weld visual detection component 261 is used to post-weld visually detect the battery cell after the negative electrode current collector plate welding. The short-circuit detection component 262 is used to short-circuit detect the battery cell after the negative electrode current collector plate welding, so as to identify the battery cell with unqualified quality. The first production device 2 further includes a first rejection unit 204, which is used to cooperate with the first detection unit 26 to perform offline processing on the battery cell with unqualified quality through the first rejection unit 204.

[0073] The positive electrode encapsulation unit 27 comprises a positive electrode encapsulation component, is arranged at the positive electrode encapsulation station, and is located at one side of the first battery cell conveying line 21, and is used for encapsulating the positive electrode of the battery cell moving to the positive electrode encapsulation unit 27; the battery cell turning unit 28 comprises a battery cell turning manipulator, is arranged at the positive electrode encapsulation station, and is used for turning the battery cell after the positive electrode encapsulation; in the embodiment, the battery cell turning unit 28 can also be other mechanical structures capable of turning the battery cell, such as a rotary cylinder provided with a pneumatic clamping jaw, and the like, and the embodiment does not make a specific limitation on this; the negative electrode insulating sheet pasting unit 29 is arranged at the negative electrode insulating sheet pasting station, and comprises a negative electrode insulating sheet pressing tool 291 and a negative electrode insulating sheet feeding tool 292; the negative electrode insulating sheet pressing tool 291 is used for picking up the negative electrode insulating sheet and pressing the negative electrode insulating sheet to the negative electrode end of the battery cell; the negative electrode insulating sheet feeding tool 292 is used for providing the negative electrode insulating sheet to the negative electrode insulating sheet pressing tool 291; the negative electrode encapsulation unit 201 comprises a negative electrode encapsulation component, is arranged at the negative electrode encapsulation station and located at one side of the first battery cell conveying line 21, and is used for encapsulating the negative electrode of the battery cell moving to the positive electrode encapsulation unit 27; the battery cell encapsulation collecting unit 202 is arranged at the battery cell encapsulation collecting station, and is used for collecting the encapsulated end of the battery cell; in the embodiment, the battery cell encapsulation collecting unit 202 comprises an encapsulation collecting assembly and an encapsulation reference assembly, the encapsulation collecting assembly is used for collecting the end of the battery cell, and the encapsulation reference assembly is used for positioning the battery cell as a reference when the battery cell is collected.

[0074] The first blanking unit 203 comprises a first turnover blanking component, and is used for turning the battery cell on the first battery cell conveying line 21 into a vertical posture and placing the battery cell on the battery cell main conveying line 1.

[0075] The battery cell transfer tool 251 comprises a first connecting disc 2511 and a second connecting disc 2512 connected with the first battery cell conveying line 21; the first connecting disc 2511 is provided with a first welding part 25111 and a first buffer part 25112, the first welding part 25111 and the first buffer part 25112 are alternately connected with the first battery cell conveying line 21; the second connecting disc 2512 is provided with a second welding part 25121 and a second buffer part 25122, the second welding part 25121 and the second buffer part 25122 are alternately connected with the first battery cell conveying line 21; the first welding part 25111 and the second buffer part 25122 are simultaneously connected with the first battery cell conveying line 21, and the first welding part 25111 and the second buffer part 25122 are connected; the first buffer part 25112 and the second welding part 25121 are simultaneously connected with the first battery cell conveying line 21, and the first buffer part 25112 and the second welding part 25121 are connected; the negative electrode current collecting disc pressing tool 252 is used for pressing the negative electrode current collecting disc to the end of the battery cell in the first welding part 25111 and the second welding part 25121 in the non-connected state.

[0076] In the first beat, the first welding part 25111 shifts towards the negative current collector plate welding assembly 254 after receiving the battery cell from the first battery cell conveying line 21, and in this process, the first buffer part 25112 is connected with the first battery cell conveying line 21 to receive the subsequent battery cell, while the second welding part 25121 is connected with the first battery cell conveying line 21 and the first buffer part 25112, and the un-welded battery cell inside the first buffer part 25112 is transferred to the second welding part 25121.

[0077] In the second beat, after the first welding part 25111 completes the welding, it is connected with the first battery cell conveying line 21 again, and in this step, the second welding part 25121 shifts towards the negative current collector plate welding assembly 254 to perform the welding, while the second buffer part 25122 is connected with the first battery cell conveying line 21 and the first welding part 25111 to receive the battery cell inside which has been welded, and in the subsequent cycle step, it is conveyed to the subsequent process. The above-mentioned first beat and second beat are alternately operated to perform the continuous current collector plate welding process.

[0078] It should be noted that the first buffer part 25112 is only used to carry the incoming battery cell on the first battery cell conveying line 21, and the second buffer part 25122 is only used to carry the battery cell inside which has been welded in the first welding part 25111.

[0079] The negative current collector plate feeding tool 253 includes a first material taking part 2531, a negative current collector plate positioning part 2532, a negative current collector plate distributing part 2533, and a negative current collector plate overturning part 2534, and before the negative current collector plate welding, the following steps are further included: s100, the first material taking part 2531 picks up the negative current collector plate conveyed by the negative current collector plate feeding unit 23; s200, the first material taking part 2531 shifts the negative current collector plate to the negative current collector plate positioning part 2532, which is used to adjust the position of the current collector plate; s300, the negative current collector plate distributing part 2533 picks up the negative current collector plate in the negative current collector plate positioning part 2532 and shifts to the negative current collector plate overturning part 2534 corresponding to the battery cell; s400, the negative current collector plate overturning part 2534 adjusts the posture of the current collector plate and adjusts the position of the negative current collector plate corresponding to the negative current collector plate pressing tool 252; s500, the negative current collector plate pressing tool 252 picks up the adjusted current collector plate and makes the negative current collector plate clamped on the negative current collector plate pressing tool 252 for welding by the negative current collector plate welding assembly 254.

[0080] It should be noted that, as shown in FIG. 6, the negative current collector plate welding assembly 254 includes a negative current collector plate welding part 2541 and a negative current collector plate conveying part 2542, and the negative current collector plate conveying part 2542 is connected with the first battery cell conveying line 21 and the first welding part 25111. Figure 4As shown, to save workspace, the negative electrode current collector feeding conveyor line is set perpendicular to the first cell conveyor line 21. The corresponding positions of the first connecting plate 2511 and the second connecting plate 2512 are provided with a negative electrode current collector flipping component 2534 and a negative electrode current collector pressing tool 252. Only one position is shown in the figure to facilitate the display of the negative electrode current collector welding assembly 254. In the above steps, the negative electrode current collector moves at a constant speed on the negative electrode current collector feeding conveyor line and is picked up and transferred by the first material picking component 2531. After being positioned by the negative electrode current collector positioning component 2532, the material is picked up by the negative electrode current collector distributing component 2533 and alternately transferred to the corresponding negative electrode current collector flipping component 2534. After adjusting the posture of the current collector, it is ready for subsequent welding.

[0081] In step s100, the first picking component 2531 further includes a Y-axis slide 52311, a Z-axis slide 25312, a support platform 25313, and a first picking component 25314; step s100 also includes the following steps:

[0082] s101, the Y-axis slide 52311 drives the Z-axis slide 25312, the support platform 25313 and the first material picking component 2531 mounted thereon to move between the negative electrode collector plate feeding conveyor line and the negative electrode collector plate positioning component 2532; s102, the Z-axis slide 25312 drives the support platform 25313 to descend above the negative electrode collector plate feeding conveyor line; s103, the first material picking component 2531 picks up several negative electrode collector plates from the negative electrode collector plate feeding conveyor line and places them in the negative electrode collector plate positioning component 2532.

[0083] It should be added that the first material picking component 2531 is a negative pressure suction gripping structure, which can be a suction cup. Multiple first material picking components 2531 are provided on its support platform 25313, as well as a gas path conversion device and a pressure monitoring device connected to each first material picking component 2531, so as to ensure that each first material picking component 2531 can grip the collection plate with the same suction force.

[0084] like Figure 3 As shown, in step s200, the negative electrode collector plate positioning component 2532 is used to carry the negative electrode collector plate and serves as a transfer point for the negative electrode collector plate dispensing component 2533 to pick up. The first picking component 2531 and the negative electrode collector plate dispensing component 2533 alternately transfer the negative electrode collector plate on the negative electrode collector plate positioning component 2532. In the above, the negative electrode collector plate positioning component 2532 is provided with a first placement hole corresponding to the first picking component 25314. The first placement hole is used to carry the negative electrode collector plate. A positioning pin is provided in the first placement hole. The positioning pin corresponds to the center hole of the negative electrode collector plate so that the positioning pin calibrates the position of each negative electrode collector plate during the placement process.

[0085] The negative electrode current collector disc distribution component 2533 comprises an electric sliding table and a sliding seat arranged on the electric sliding table, and the sliding seat is provided with a second picking element. The method further comprises the following steps: s301, the sliding seat is alternately transferred along the electric sliding table between the negative electrode current collector disc positioning component 2532 and the negative electrode current collector disc overturning component 2534; s302, the second picking element picks up the negative electrode current collector disc in the negative electrode current collector disc positioning component 2532; and s303, the second picking element places the negative electrode current collector disc in the negative electrode current collector disc overturning component 2534.

[0086] It should be noted that the second picking element is also a negative pressure suction type grabbing structure, and the negative electrode current collector disc distribution component 2533 is alternately transferred to the first connecting disc 2511 and the second connecting disc 2512 after picking up the negative electrode current collector disc by the negative electrode current collector disc positioning component 2532.

[0087] In another preferred embodiment, as shown in the figure, Figure 7 the step s400 further comprises the following steps: s401, the negative electrode current collector disc overturning component 2534 receives the negative electrode current collector disc in the second picking element; s402, the negative electrode current collector disc overturning component 2534 synchronizes the transfer process of the negative electrode current collector disc distribution component 2533 to drive the negative electrode current collector disc to overturn and adjust the posture of the negative electrode current collector disc to correspond to the battery cell; and s403, the negative electrode current collector disc overturning component 2534 transfers the negative electrode current collector disc to the negative electrode current collector disc pressing tool 252.

[0088] It should be noted that the negative electrode current collector disc overturning component 2534 comprises a plurality of overturning tables and a first driving assembly for driving the overturning tables to rotate; the output end of the first driving assembly is provided with a transmission rotating rod; one end of the overturning table is provided with a third picking element, and the other end of the overturning table is fixedly arranged on the transmission rotating rod to drive the plurality of overturning tables to synchronously rotate under the driving of the first driving assembly; the third picking element is provided with a positioning block corresponding to the negative electrode current collector disc, and the positioning block is provided with a suction cup air cylinder acting on the negative electrode current collector disc; the overturning table is provided with a second driving assembly for driving the overturning table to extend, and the second driving assembly is used to drive the overturning table to extend to the corresponding position of the negative electrode current collector disc pressing tool 252.

[0089] The negative electrode current collector disc overturning component 2534 is in a horizontal posture to receive the negative electrode current collector disc transferred by the negative electrode current collector disc distribution component 2533, and after receiving the negative electrode current collector disc, the negative electrode current collector disc overturning component 2534 is rotated by 90° to switch the negative electrode current collector disc to a vertical state corresponding to the negative electrode current collector disc pressing tool 252 and the battery cell; and then, as shown in the figure, Figure 7 the second driving assembly drives the overturning table to extend to the corresponding position of the negative electrode current collector disc pressing tool 252, and the negative electrode current collector disc is pushed into the negative electrode current collector disc pressing tool 252 by the suction cup air cylinder.

[0090] In this application, it is also necessary to supplement the related structure of the negative electrode current collector plate pressing tool 252, as shown in the figure Figure 7 The negative electrode current collector plate pressing tool 252 is arranged below the negative electrode current collector plate turnover part 2534 and opposite to the battery cell in the welding part;

[0091] The negative electrode current collector plate pressing tool 252 includes a negative electrode current collector plate pressing head 2521, a material sensor and a locking piece arranged on the side of the negative electrode current collector plate pressing head 2521; the material sensor is used to detect whether there is a current collector plate in the negative electrode current collector plate pressing head 2521, and if so, the next step of laser welding is performed; the output end of the locking piece is provided with a locking rod abutting against the current collector plate, which is used to abut against the current collector plate for locking; the side of the negative electrode current collector plate pressing head 2521 is also provided with a gas supply assembly for supplying protective gas during welding.

[0092] In this application, as shown in the figure Figure 9 The negative electrode current collector plate welding assembly 254 includes a second sliding table 2541, a progressive sliding table 2542, a galvanometer welding head 2543 and a distance measuring sensor 2544; the negative electrode current collector plate welding assembly 254 adopts the following welding steps: s501, the negative electrode current collector plate welding assembly 254 alternately switches on one side of the first connection disc 2511 and the second connection disc 2512 along the second sliding table 2541; s502, after moving to the corresponding connection disc, the distance measuring sensor 2544 measures the distance to the focal length connection disc, automatically calculates the focal length, and then adjusts the distance of the laser welding focal length through the movement of the progressive sliding table 2542; s503, N galvanometer welding heads 2543 weld N current collector plates corresponding thereto, and weld M current collector plates adjacent to the target current collector plate through the deflection of the galvanometer welding head 2543; s504, the negative electrode current collector plate welding assembly 254 moves a distance of M+1 current collector plate widths along the current collector plate arrangement direction, and welds again until all the current collector plates in the connection disc are welded.

[0093] Specifically, three groups of galvanometer welding heads 2543 are arranged on the negative electrode current collector plate welding assembly 254, and each galvanometer welding head 2543 completes the welding of two current collector plates (i.e. the current collector plates adjacent to each other are M, M=1) through the deflection of the galvanometer welding head 2543, and then the whole negative electrode current collector plate welding assembly 254 moves two current collector plate positions, and welds the other two groups of current collector plates again, so as to achieve the purpose of welding one current collector plate and one battery cell. It needs to be supplemented that the spacing between each galvanometer welding head 2543 is the same as the range of its action, for example, if the galvanometer welding head 2543 can weld three current collector plates at the same time, the spacing between each galvanometer welding head 2543 is the distance of three current collector plate unit lengths.

[0094] It should be noted that in the process of transferring the battery cell carried in the welding part in step s501 to the negative current collector plate welding assembly 254, the welding part pushes the battery cell and fixes it on the negative current collector plate pressing tool 252.

[0095] In the above steps, as shown in Figure 4 、 Figure 8 The first adapter plate 2511 and the second adapter plate 2512 are provided with pressing mechanisms 2522 corresponding to the negative current collector plate pressing tool 252.

[0096] The pressing mechanism 2522 includes a push head, a pressure sensor arranged on the push head, and a third driving assembly for driving the push head to move. A cylinder connecting plate for carrying the push head and the pressure sensor is arranged on the output end of the third driving assembly.

[0097] The pressing mechanism 2522 further includes a battery cell bracket for carrying the battery cell, and a battery cell clamping member arranged in the battery cell bracket for clamping the battery cell. A push plate is further arranged on the output end of the third driving assembly. The side of the battery cell bracket opposite to the push plate is provided with a cam mechanism in transmission connection with the battery cell clamping member. When the third driving assembly operates, the push plate on the output end of the third driving assembly first contacts the cam mechanism, and the battery cell clamping member in transmission connection with the cam mechanism is opened, so that the battery cell can move in the battery cell bracket. Secondly, the third driving assembly continues to operate, and the push head on the cylinder connecting plate of the output end of the third driving assembly contacts the battery cell, pushes the battery cell to move along the battery cell bracket towards the negative current collector plate pressing tool 252, and stops until the pressure sensor detects that the battery cell reaches a predetermined pressure.

[0098] In the process of transferring the welding part of the first adapter plate 2511 and the second adapter plate 2512 to the negative current collector plate welding assembly 254, the pressing mechanism 2522 operates synchronously, which can loosen the clamping of the battery cell and push the battery cell to be pressed on the negative current collector plate pressing tool 252.

[0099] It is easily conceivable that the first adapter plate 2511 and the second adapter plate 2512 should also be provided with an electric sliding table for driving the switching of the first adapter plate 2511 and the second adapter plate 2512 in the process of switching perpendicular to the first battery cell conveying line 21. When the electric sliding table switches, the first battery cell conveying line 21 stops running.

[0100] In this scheme, the positive rubber-coated part and the negative rubber-coated part have the same structure, and each includes a rubber-coated assembly, a battery cell rotating driving assembly, and a centering positioning assembly.

[0101] The encapsulating assembly comprises an encapsulating base, an unwinding element, a tension adjusting element, a pulling element and a shearing element; the unwinding element is arranged on the encapsulating base and is used for mounting and unwinding a tape roll for encapsulation; the tension adjusting element is arranged on the encapsulating base and is used for adjusting the tension of the unwound tape on the tape roll and guiding the tape with adjusted tension to the pulling element; the pulling element is used for pulling out the tape to a specified length and positioning the tape; the shearing element is arranged on the encapsulating base and is used for shearing the tape pulled out by the pulling element; when the battery cell is encapsulated, the tape roll is stably unwound by the unwinding element, the unwound tape on the tape roll is stably conveyed to the pulling element after being tensioned by the tension adjusting element, the pulling element holds the tape in place and positions the tape, and the shearing element shears the tape in the tensioned state;

[0102] The battery cell rotating assembly is used for applying a flexible pressure covering force to the back of the tape, ensuring that the adhesive surface of the tape reliably adheres to the surface of the battery cell without damaging the tape and the battery cell, and driving the rotation of the battery cell to better complete the encapsulation of the end of the battery cell. Specifically, the battery cell rotating assembly comprises a rotating driving unit and a roller drivingly connected to the rotating driving unit, the roller drives the rotation of the battery cell by contacting the cylindrical surface of the battery cell while applying pressure to the tape; wherein the rotating driving unit is a motor.

[0103] The centering and positioning assembly is arranged corresponding to the encapsulating part and is used for lifting the battery cell to be encapsulated from the first battery cell conveying line 21, adjusting the relative position of the battery cell to the corresponding encapsulating part by pushing the end of the battery cell, and making the battery cell contact the battery cell rotating assembly; and after the encapsulation of the battery cell is completed, the battery cell is returned to the original position of the first battery cell conveying line 21; wherein the centering and positioning assembly lifts the two ends of the battery cell by two roller sets, each roller set comprises two rollers, and the end of the battery cell is located between the two rollers in the corresponding roller set; at the same time, when the centering and positioning assembly limits the battery cell, it contacts the end of the battery cell through a rotating disc.

[0104] In this scheme, the negative electrode encapsulation station and the negative electrode encapsulation station are arranged at the same position of the first battery cell conveying line 21, the battery cell is first located on the centering and positioning assembly in the negative electrode encapsulation unit 201, the negative electrode encapsulation unit 201 is encapsulated by the negative electrode encapsulation unit 201, and the negative electrode encapsulation unit 201 is encapsulated by the negative electrode encapsulation unit 201.

[0105] The negative electrode insulation sheet pressing tool 291 comprises a negative electrode insulation sheet pressing head 2911 arranged at the corresponding end of the battery cell, which is used to place the negative electrode insulation sheet parallel to the end of the battery cell. A pushing component can be arranged to push the negative electrode insulation sheet pressing head 2911 to move towards or away from the battery cell, so as to press the battery cell and the negative electrode insulation sheet on the negative electrode insulation sheet pressing head 2911. The pushing component can be a telescopic air cylinder;

[0106] The negative electrode insulation sheet feeding tool 292 comprises a second material taking component 2921, a primary positioning component 2922, a negative electrode insulation sheet distributing component 2923, a secondary positioning component 2925, and a negative electrode insulation sheet overturning component 2924. The second material taking component 2921 is used to pick up the negative electrode insulation sheet on the negative electrode insulation sheet feeding unit 24 and move it horizontally to the primary positioning component 2922. Preferably, the second material taking component 2921 can be a material taking robot, which can pick up multiple negative electrode insulation sheets at one time. The primary positioning component 2922 is used to receive the horizontally placed negative electrode insulation sheet and position it at one time. In this embodiment, the primary positioning component 2922 is provided with a second installation hole corresponding to the second material taking component 2921, which is used to carry and position the negative electrode insulation sheet.

[0107] The negative electrode insulation sheet distributing component 2923 is used to pick up the negative electrode insulation sheet in the primary positioning component 2922 and transfer it horizontally to the secondary positioning component 2925. In this embodiment, the negative electrode insulation sheet distributing component 2923 comprises a third sliding table across the primary positioning component 2922 and the secondary positioning component 2925 and a negative electrode insulation sheet suction disc assembly. The third sliding table drives the negative electrode insulation sheet suction disc assembly to transfer the negative electrode insulation sheet on the primary positioning component 2922 to the corresponding secondary positioning component 2925. The primary positioning component 2922 and the secondary positioning component 2925 can be arranged in multiple numbers and distributed on both sides of the third sliding table.

[0108] The secondary positioning component 2925 is used to receive the horizontally placed negative electrode insulation sheet and position it at one time. In this embodiment, the secondary positioning component 2925 comprises a positioning support table, the top of which is provided with a limiting groove, and the negative electrode insulation sheet is placed in the limiting groove for limiting.

[0109] The negative electrode insulation sheet overturning member 2924 is arranged at the corresponding negative electrode insulation sheet pressing tool 291, and is used to pick up the negative electrode insulation sheet in the secondary positioning member 2925, overturn the negative electrode insulation sheet to a vertical posture, drive the vertical posture negative electrode insulation sheet to move, and make the position of the negative electrode insulation sheet correspond to the negative electrode insulation sheet pressing tool 291. In the embodiment, the negative electrode insulation sheet overturning member 2924 comprises a second overturning power member and a second overturning table connected with the second overturning power member, the second overturning power member is used to drive the second overturning table to overturn 90° up and down, and corresponding grabbing elements and lifting elements are also arranged on the second overturning table, the grabbing elements are used to support and limit the negative electrode insulation sheet in a horizontal posture, drive the negative electrode insulation sheet to overturn to a vertical posture, and the lifting elements are used to drive the grabbing elements to move up and down after the negative electrode insulation sheet is overturned to the vertical posture, so that the negative electrode collector plate corresponds to the negative electrode insulation sheet pressing head 2911; the overturning member can also be directly replaced by a multi-axis industrial robot, and the difference lies in that the cost of the application is lower.

[0110] As Figures 12 to 19As shown, the second production device 3 is formed with a shell-entering work station, an outer insulation sheet feeding work station, a cell screw locking work station, a cell screw welding work station and a second detection work station. The second production device 3 comprises: a second cell conveying line 31 located at one side of the cell main conveying line 1, which sequentially passes through the shell-entering work station, the outer insulation sheet feeding work station, the cell screw locking work station, the cell screw welding work station and the second detection work station, and is used to convey the cells; a shell conveying line 32 located at one side of the second cell conveying line 31, which is used to convey the shells to the shell-entering work station; specifically, the shells located on the shell conveying line 32 are in a vertical posture with the opening downward, and the shells are conveyed to the shell-entering work station in this posture; a shell carrier 321 arranged on the second cell conveying line 31, which is used to carry and clamp the shells of the cells and moves with the second cell conveying line 31; in this embodiment, the shell carrier 321 is provided with a hole corresponding to the bottom of each shell, which is used to allow the corresponding cell to enter the shell; a second feeding unit 33 comprising a first vertical feeding component, which is used to transfer the vertical cells on the cell main conveying line 1 to the shell-entering work station in a vertical posture; an outer insulation sheet feeding unit 34, which is an outer insulation sheet feeding conveying line and is located at one side of the second cell conveying line 31, and is used to convey the outer insulation sheets to the outer insulation sheet feeding work station; a nut feeding unit 35, which is used to supply the nuts to the cell screw locking work station; specifically, the nut feeding unit 35 comprises a rack and a nut vibrating disc 351 and a nut conveying plate 352 arranged on the rack, the nut conveying plate 352 is connected with the discharge end of the nut vibrating disc 351, the nut vibrating disc 351 is provided with a plurality of discharge ports for outputting the nuts, the nut conveying plate 352 is provided with a plurality of nut conveying grooves 3521, each nut conveying groove 3521 corresponds to each discharge port and is in communication with each other, and a large number of nuts placed in the nut vibrating disc 351 enter different nut conveying grooves 3521 on the nut conveying plate 352 under the action of high-frequency vibration of the nut vibrating disc 351, and the nuts are conveyed to the cell screw locking work station;

[0111] The cell housing unit 36 is arranged at the cell housing station and includes a shell loading assembly 361 and a vertical cell housing assembly 362 arranged in sequence along the conveying direction of the second cell conveying line 31; the shell loading assembly 361 is arranged between the second cell conveying line 31 and the shell conveying line 32 for clamping the shell on the shell conveying line 32 and conveying the shell into the shell carrier 321 in an open-down posture, and the second cell conveying line 31 drives the shell carrier 321 with the shell to move to the vertical cell housing assembly 362; the vertical cell housing assembly 362 is arranged below the second loading unit 33 for receiving the vertical cell on the second loading unit 33 and moving the cell to the position directly below the shell carrier 321 in a vertical posture, and the cell is pushed upward into the shell; in this embodiment, the vertical cell housing assembly 362 includes a shell positioning component 3623, a cell feeding component 3621 and a cell pushing component 3622.

[0112] The shell positioning component 3623 is used for clamping and positioning the top of the shell in the shell carrier 321 and includes a pressing clamping element and a first lifting element, the pressing clamping element is arranged at the execution end of the first lifting element, the pressing clamping element includes a mounting block connected with the first lifting element and a first clamping piece and a pressing piece arranged on the mounting block, the first clamping piece is used for clamping the top of the shell in the shell carrier 321 to keep the shell in a vertical posture, and the pressing piece is pressed downward on the top of the shell to avoid upward movement of the shell during the cell housing process; wherein the first lifting element and the pressing piece can use a telescopic cylinder as the power for upward and downward movement.

[0113] The cell feeding component 3621 includes a cell positioning carrier and a servo slide for driving the cell positioning carrier to move, after receiving the cell conveyed by the second loading unit 33, the cell positioning carrier is driven by the servo slide to move to the position directly below the shell carrier 321 and directly above the cell pushing component 3622, the cell is pushed upward into the shell by the cell pushing component 3622, and the vertical cell housing is completed. The cell pushing component 3622 includes a push rod and a pushing piece connected with the push rod, the push rod corresponds to the cell in the cell positioning carrier one by one, and the bottom of the cell positioning carrier has a gap hole for the push rod to pass through; the pushing piece can be a vertical lifting cylinder or a vertical moving module.

[0114] In the first beat, the cell feeding component 3621 shifts towards the shell carrier 321 after receiving the cell from the second feeding unit 33, and in the process, the second feeding unit 33 shifts towards the cell main conveying line 1 to pick up the cell on the cell main conveying line 1; in the second beat, the cell feeding component 3621 moves the cell to the position directly below the shell carrier 321 and directly above the cell pushing component 3622, and the cell pushing component 3622 starts to work, and in the process, the shell positioning component clamps and positions the shell in the shell carrier 321; in the third beat, the cell pushing component 3622 and the shell positioning component reset, and the cell feeding component 3621 moves towards the second feeding unit 33, while the second feeding unit 33 picks up the cell on the cell main conveying line 1 and moves towards the cell feeding component 3621, and the second cell conveying line 31 conveys the shell carrier 321 with the cell in the shell to the subsequent process, and moves the shell carrier 321 with the cell in the shell to the position; the above first beat to the third beat repeats to continuously perform the cell in the shell.

[0115] The outer insulation sheet feeding unit is arranged at the outer insulation sheet feeding station and includes an outer insulation sheet shifting assembly and a guiding assembly. The outer insulation sheet shifting assembly is used to suck the outer insulation sheet from the outer insulation sheet feeding unit 34 and shift the outer insulation sheet to the position directly above the guiding assembly and make the outer insulation sheet move downward. The shell carrier 321 carries the cell with the shell into the guiding assembly and makes the negative electrode end of the cell be located directly below the outer insulation sheet shifting assembly. The guiding assembly is used to guide the downward moving outer insulation sheet and abut against the cell from bottom to top to feed the outer insulation sheet to the negative electrode end of the cell. Specifically, the outer insulation sheet shifting mechanism includes a horizontal sliding table, a vertical sliding table and an outer insulation sheet suction disc assembly. The vertical sliding table is connected with the execution end of the horizontal sliding table. The horizontal sliding table drives the vertical sliding table to reciprocate between the insulation sheet feeding unit 34 and the second cell conveying line 31. The outer insulation sheet suction disc assembly is installed on the execution end of the vertical sliding table. The vertical sliding table drives the outer insulation sheet suction disc assembly to move up and down. The outer insulation sheet suction disc assembly is used to suck and release the outer insulation sheet. When the outer insulation sheet suction disc assembly sucks multiple outer insulation sheets at one time, the arrangement direction of the multiple outer insulation sheets is parallel to the conveying direction of the second cell conveying line 31. The moving direction of the horizontal sliding table is perpendicular to the conveying direction of the second cell conveying line 31. The guiding assembly includes multiple upper guiding bushings and multiple lower lifting rods 3722. The shell carrier 321 is between the guiding bushings and the lifting rods 3722. When the suction disc assembly feeds the insulation sheet to the negative electrode end of the cell, the guiding bushings vertically guide the suction disc of the suction disc assembly, and the lifting rods 3722 abut against the cell directly below the cell;

[0116] The electric core locking screw unit 38 is arranged at the electric core locking screw station and is used for picking up a plurality of nuts and tightening the nuts on a plurality of to-be-processed electric cores. The electric core locking screw unit 38 comprises a distributing assembly 381 and a tightening assembly 382. The distributing assembly 381 comprises a fixed frame 3811, a first lifting element 3812, a movable frame 3813, a plurality of adapter plates 3814, a second lifting element 3815 and a positioning column 3816. The fixed frame 3811 is arranged at the bottom of the nut conveying plate 352. The first lifting element 3812 is arranged at the side of the fixed frame 3811 away from the nut vibrating disc 351. The execution end of the first lifting element 3812 is connected with the movable frame 3813, so that the movable frame 3813 is driven by the first lifting element 3812 to move up and down. The movable frame 3813 comprises a support plate and a mounting plate. One end of the support plate is connected with the execution end of the first lifting element 3812, and the other end is connected with the mounting plate. The plurality of adapter plates 3814 are arranged at the top of the mounting plate of the movable frame 3813. The adapter plate is provided with a receiving groove corresponding to the nut conveying groove 3521 at the side close to the nut conveying groove 3521. When the execution end of the first lifting element 3812 is at the minimum extension length, the receiving groove of the adapter plate is connected with the nut conveying groove 3521 to receive the single nut output by the nut conveying groove 3521 and position the nut. The second lifting element 3815 is arranged at the bottom of the mounting plate of the movable frame 3813. The execution end of the second lifting element 3815 is inserted into the adapter plate. Before the nut is sucked, the execution end of the second lifting element 3815 is elongated to push the nut in the adapter plate upward, so that the nut leaves the receiving groove and is easily sucked.

[0117] The screw welding unit 39 is a laser welding component arranged at the cell screw welding station and used for welding the screw and the negative pole of the cell; the second detection unit is arranged at the second detection station and used for detecting the locking effect of the screw and the negative pole of the cell before the screw welding and detecting the welding effect of the screw and the negative pole of the cell after the screw welding; specifically, the second detection unit comprises a pre-welding visual detection component 301 and a second post-welding visual detection component 302, which are arranged in sequence along the conveying direction of the second cell conveying line 31, the pre-welding visual detection component 301 is used for detecting the locking effect of the screw and the negative pole of the cell, and the second post-welding visual detection component 302 is used for detecting the welding effect of the screw and the negative pole of the cell which has completed the welding; the second production device 3 further comprises a second rejection unit, which is used in cooperation with the second detection unit to perform offline processing on the cells with unqualified quality through the second rejection unit.

[0118] The second unloading unit 303 comprises a first vertical unloading component, which is used for transferring the vertical cells on the second cell conveying line 31 to the cell main conveying line 1 in a vertical posture.

[0119] The first vertical loading component, the first vertical unloading component and the shell loading assembly 361 all comprise a horizontal movement module, a vertical movement module and a clamping jaw, the horizontal movement module is used to drive the clamping jaw to move horizontally, the vertical movement module is used to drive the clamping jaw to move vertically, and the clamping jaw is used to clamp the corresponding cell and shell; specifically, the vertical movement module is arranged at the execution end of the horizontal movement module, and the clamping jaw is arranged at the execution end of the vertical movement module; for example, when the horizontal movement module is a horizontal electric sliding table, the vertical movement module is connected with the sliding table in the electric sliding table, and when the horizontal movement module is a telescopic air cylinder, the clamping jaw is arranged at the telescopic rod of the telescopic air cylinder; since the specific structures of the horizontal movement module, the vertical movement module and the clamping jaw are common knowledge of those skilled in the art, they will not be described in detail here. Of course, an industrial clamping jaw robot in the prior art can also be directly used to achieve the above purpose.

[0120] As shown in Figures 20 to 22 The third production device 4 is formed with a pre-point welding station, a full welding station, a penetration welding station, a rolling edge station and a third detection station, and comprises: a third cell conveying line 41 located on one side of the cell main conveying line 1, which sequentially passes through the pre-point welding station, the full welding station, the penetration welding station, the rolling edge station and the third detection station, and is used to convey the cells; a third loading unit 42 comprising a second turnover loading component, which is used to turn the vertical cells on the cell main conveying line 1 into horizontal cells and convey them to the second cell conveying line 31 in a longitudinal arrangement posture; and a positive current collector disc feeding unit 43, which is a positive current collector disc feeding conveying line located on one side of the third cell conveying line 41 and used to feed the positive current collector discs to the pre-point welding station.

[0121] The pre-spot welding unit 44 is arranged at the pre-spot welding station and includes a positive electrode current collector plate transfer assembly 441, a positive electrode current collector plate pressing tool, and a pre-spot welding device 442. The positive electrode current collector plate transfer assembly 441 is used to transfer the positive electrode current collector plate to the pressing head of the positive electrode current collector plate pressing tool. The positive electrode current collector plate pressing tool is used to place the positive electrode current collector plate and press the positive electrode current collector plate to the end of the battery cell.

[0122] The pre-spot welding device 442 is used to pre-spot weld the positive electrode current collector plate pressed to the end of the battery cell.

[0123] The positive electrode current collector plate transfer assembly 441 includes a carrying component 4411, a positioning component 4412, and a turnover component 4413. The carrying component 4411 includes a suction disc and a sliding table extending along the conveying direction of the third battery cell conveying line 41. The sliding table covers the positive electrode current collector plate feeding unit 43, the positioning component 4412, and the turnover component 4413. The suction disc is used to suck the positive electrode current collector plate from the positive electrode current collector plate feeding unit 43 and release the positive electrode current collector plate at the positioning component 4412. The sliding table is used to drive the suction disc to move between the positive electrode current collector plate feeding unit 43, the positioning component, and the turnover component in sequence. The turnover component 4413 is used to transfer the positive electrode current collector plate positioned and placed at the positioning component 4412 to the positive electrode current collector plate pressing tool.

[0124] The full welding unit 45 includes a full welding device and is arranged at the full welding station. The full welding unit 45 is used to full weld the end of the battery cell pre-spot welded.

[0125] The penetration welding unit 46 includes a penetration welding device and is arranged at the penetration welding station. The penetration welding unit 46 is used to penetration weld the end of the battery cell full welded. The pre-spot welding device 442, the full welding device, and the penetration welding device are all laser welding devices.

[0126] The edge rolling unit 47 is arranged at the edge rolling station and is used to remove the welding points and welding slag at the weld of the battery cell after welding. The edge rolling unit 47 includes a clamping and rotating component and a rolling component. The third battery cell conveying line 41 drives the battery cell to move between the clamping and rotating component and the rolling component. The clamping and rotating component clamps the end of the battery cell and drives the battery cell to rotate. The rolling component rolls the weld of the battery cell.

[0127] The third detection unit 48 is arranged at the third detection station and is used for detecting the welding effect of the welded battery cell; the third detection unit 48 comprises a 3D scanning weld seam device 481 and a post-weld visual detection device 482; the 3D scanning weld seam device 481 is used for detecting the weld seam quality of the post-penetration welded battery cell; the post-weld visual detection device 482 is specifically a 2D visual detection device 571 and is used for detecting the weld seam quality of the post-rolling battery cell; the third detection unit 48 further comprises a short circuit detection device 483 and is used for detecting the short circuit of the post-rolling battery cell; the third production device 4 further comprises a third rejection unit, which is used in cooperation with the third detection unit 48 to perform offline processing on the battery cell with unqualified quality.

[0128] The third unloading unit 49 comprises a second overturning unloading component and is used for overturning the horizontal battery cell on the third battery cell conveying line 41 into a vertical posture and placing the battery cell on the battery cell main conveying line 1.

[0129] Specifically, the pre-point welding unit 44, the full welding unit 45 and the penetration welding unit 46 in the application each comprise a welding unit with the same structure and working principle as the “battery cell transfer tool 251”; the welding unit is provided with two adapter plates, and a welding part and a buffer part are arranged on each adapter plate; the welding part and the buffer part are alternately connected with the third battery cell conveying line 41; the corresponding positive current collector plate pressing tool, the positioning component and the overturning component are respectively provided with two groups corresponding to the two adapter plates of the pre-point welding unit 44; at the same time, the welding structure and the movement process of the corresponding pre-point welding device 442, the full welding device and the penetration welding device are the same as those of the “negative current collector plate welding assembly 254”, and the welding unit alternately switches on one side of the two adapter plates to perform welding work.

[0130] As shown in Figure 23 , Figure 24 The fourth production device 5 is provided with a first cleaning station, a nail supply station, a sealing nail welding station, a code printing station and a fourth detection station; the fourth production device 5 comprises: a fourth battery cell conveying line 51 located on one side of the battery cell main conveying line 1; the fourth battery cell conveying line 51 sequentially passes through the first cleaning station, the nail supply station, the sealing nail welding station, the code printing station and the fourth detection station and is used for conveying the battery cell; a plurality of rows of battery cell carriers 511 are arranged on the fourth battery cell conveying line 51 and are used for carrying a plurality of rows of vertical battery cells and moving with the fourth battery cell conveying line 51; in the embodiment, the battery cells on the plurality of rows of battery cell carriers 511 are two rows; a fourth loading unit 52 comprises a second vertical loading component and is used for conveying the battery cell on the battery cell main conveying line 1 to the plurality of rows of battery cell carriers 511 in a vertical posture; the second vertical loading component has the same structure as the first vertical loading component;

[0131] The first cleaning unit 53 comprises a laser cleaning mechanism and is arranged at the first cleaning station to clean the liquid injection holes of the battery cells on the multi-row battery cell carrier 511 moved to the first cleaning station. In the embodiment, the first cleaning unit 53 can also be other cleaning mechanisms capable of cleaning the liquid injection holes of the battery cells, such as alcohol cleaning mechanisms, dimethyl carbonate (DMC) cleaning mechanisms, etc., which are not limited in the embodiment. In the embodiment, the laser cleaning mechanism comprises a laser cleaning assembly A and a laser cleaning assembly B arranged symmetrically along the conveying track of the fourth battery cell conveying line 51 on both sides of the fourth battery cell conveying line 51, and further comprises two sets of laser dust removal positioning mechanisms corresponding to the laser cleaning assembly A and the laser cleaning assembly B. The laser cleaning assembly A and the laser cleaning assembly B synchronously clean two rows of battery cells on the multi-row battery cell carrier 511 by laser, and the two sets of laser dust removal positioning mechanisms are respectively used to position and remove dust from the two rows of battery cells.

[0132] The sealing nail loading unit 54 is arranged at the nail supply station to pick up the sealing nails and move the sealing nails to the sealing nail welding station. The sealing nail loading unit 54 adopts a sealing nail loading mechanism, which has the same structure as the outer insulation sheet transfer mechanism. Of course, a multi-axis industrial robot in the prior art can also be directly used for picking up. The sealing nail welding unit 55 comprises a sealing nail welding mechanism and is arranged at the sealing nail welding station to weld the sealing nails in the liquid injection holes of the battery cells.

[0133] The code printing unit 56 is arranged at the code printing station to perform laser code printing on the battery cells. In the embodiment, the sealing nail welding unit 55 and the code printing unit 56 have the same layout in the fourth production device 5, both of which have lasers. The difference lies in the model, control mode and action of the laser.

[0134] The sealing nail welding unit 55 / code printing unit 56 comprises two sealing nail welding assemblies / two laser code printing assemblies and two sets of laser dust removal positioning mechanisms arranged symmetrically along the conveying track of the fourth battery cell conveying line 51 on both sides of the fourth battery cell conveying line 51. The two sealing nail welding assemblies / two laser code printing assemblies are symmetrically arranged, and the two sealing nail welding assemblies / two laser code printing assemblies synchronously perform laser welding / code printing on two rows of battery cells on the multi-row battery cell carrier 511, and the two sets of laser dust removal positioning mechanisms are respectively used to position and remove dust from the two rows of battery cells.

[0135] The fourth inspection unit 57 is located at the fourth inspection station and is used to inspect the weld of the sealing nail. In this embodiment, the fourth inspection unit 57 includes a 2D vision inspection device 571 and a 3D vision inspection device 572. The 2D vision inspection device 571 and the 3D vision inspection device 572 are arranged sequentially along the conveying direction of the fourth cell conveying line 51 and are used to perform 2D and 3D inspection on the weld of the sealing nail. The fourth production device 5 also includes a fourth rejection unit 59, which works in conjunction with the fourth inspection unit 57 to remove substandard cells from the production line.

[0136] The fourth unloading unit 58 includes a second vertical unloading component, used to transport the battery cells on the fourth battery cell conveying line 51 to the main battery cell conveying line 1 in a specified orientation. The second vertical unloading component has the same structure as the first vertical unloading component.

[0137] like Figures 24 to 26 As shown, the fifth production device 6 has a second cleaning station, a first rejection station and a coating station. The fifth production device 6 includes a fifth cell conveying line 61, which is located on one side of the main cell conveying line 1. The fifth cell conveying line 61 passes through the second cleaning station, the first rejection station and the coating station in sequence to convey cells.

[0138] The fifth feeding unit 62 includes a third flipping feeding component, which flips the vertical battery cells on the main battery cell conveying line 1 into a horizontal position and conveys them to the fifth battery cell conveying line 61 in a longitudinal arrangement.

[0139] The second cleaning unit 63 is located at the second cleaning station. It includes an end-face cleaning mechanism 631 and a cylindrical cleaning mechanism 632, which are used to clean the end faces and cylindrical surfaces of the battery cells, respectively. Specifically, the cylindrical cleaning mechanism 632 includes a first cleaning component and a dust removal pipe perpendicular to the battery cell, a support wheel for receiving and rotating the battery cell, and a third drive unit for driving the support wheel. The end-face cleaning mechanism 631 includes second cleaning components distributed on both sides of the fifth battery cell conveyor line 61. The first and second cleaning components are plasma rotary spray guns. The first cleaning component is located above the battery cell, and the spray gun height is fixed. The gun head rotates to spray plasma, and the battery cell rotates once under the drive of the drive wheel to complete the plasma cleaning of the cylindrical surface. Simultaneously, the end-face cleaning mechanisms 631 are located at both ends of the battery cell, and the spray guns rotate to perform plasma cleaning on the end faces of the battery cell. The unit also includes a fifth detection unit 64, which uses visual inspection to detect dirt, scratches, and impurities on the cylindrical surfaces of the battery cell. The fifth rejection unit 65 is located at the first rejection station and is used to reject products that fail the inspection by the fifth inspection unit 64. The fifth rejection unit 65 may be a multi-axis industrial pick-up robot. The film coating unit 66 is located at the film coating station and is used to coat the film onto the surface of the battery cell. The film coating unit 66 is a film coating machine.

[0140] The fifth dispensing unit 67 comprises a third turnover dispensing component, which is used to deliver the battery cell on the fifth battery cell conveying line 61 to the battery cell main conveying line 1 in a specified posture.

[0141] The sleeve unit 66 is arranged at the side of the fifth battery cell conveying line 61, and the sleeve unit 66 comprises a tray 661, a feeding wheel 662, a film guide shaft 663, a cutter 664, a clamping part 665 and a mounting frame. The film belt is arranged on the tray 661, and the film belt is pulled to the film guide shaft 663 by the feeding wheel 662. The film guide shaft 663 is coaxial with the axis of the corresponding battery cell, and the film belt is sleeved on the film guide shaft 663, so as to expand the film belt and facilitate the transfer of the film on the film guide shaft 663 to the battery cell. The clamping part 665 is used to move the film belt on the film guide shaft 663, and the cutter 664 is used to cut the film belt.

[0142] Specifically, the film guide shaft 663 is provided with a shaft head 6631 at one end close to the feeding wheel 662. The shaft head 6631 is duck-billed from small to large. When the film belt is first fed, the film belt is sleeved on the shaft head 6631 by manual operation, and then the film belt is pulled to the other end of the film guide shaft 663 and cut by the cutter 664. The feeding wheel 662 continues to drive the film belt to feed forward, and the cut film is moved to the outer surface of the battery cell under the pushing of the film behind. In order to facilitate the movement of the film belt on the film guide shaft 663, a sliding section is arranged on the film guide shaft 663, and a guide cylinder 6632 is sleeved on the sliding section. The diameter of the sliding section is smaller than the diameter of the film guide shaft 663. Meanwhile, a pressing part 666 is arranged on an inner side wall of the mounting frame. The clamping part 665 comprises a fourth driving unit 6651 and a fifth driving unit 6652, and further comprises two groups of clamping blocks for clamping the guide cylinder 6632 and the film belt. The fifth driving unit 6652 is used to drive the two groups of clamping blocks to move relatively to clamp the guide cylinder 6632 and the film belt. The sixth driving unit is used to drive the clamping part 665 to move reciprocally and move the guide cylinder 6632 and the film belt towards the cutter 664. The pressing part 666 is used to press and fix the film belt at a fixed period. When the fourth driving unit 6651 drives the guide cylinder 6632 and the film belt to move towards the cutter 664, the fifth driving unit 6652 is in a clamping state, and the pressing part 666 is in an unlocking state, so as to facilitate the advancement of the film belt. In the resetting process of the guide cylinder 6632, in order to fix the position of the film belt, the pressing part 666 presses and fixes the film belt on the film guide shaft 663, so as to avoid the deviation of the film belt.

[0143] It should be noted that the sliding section is provided with a resetting member 6633 corresponding to the guide cylinder 6632. The resetting member 6633 is used to push the guide cylinder 6632 to move away from the end of the cutter 664. The pressing part 666 is used to fix the film belt during the resetting process of the clamping part 665. In use, the film belt can be periodically advanced to the cutter 664, and then the film belt is cut by the cutter 664 and sleeved on the battery cell.

[0144] It also needs to be explained that the mounting frame is provided with a first installation hole corresponding to the film guide shaft 663, and a magnetic ring 6635 is arranged on the inner wall of the first installation hole and the two ends of the film guide shaft 663, and the magnetic ring 6635 is used to suspend the film guide shaft 663 in the mounting frame; a plurality of guide wheels 6634 in contact with the film guide shaft 663 are arranged in the mounting frame.

[0145] It also needs to be supplemented that the cutter 664 includes a sixth driving unit, a rotating ring and a blade; the sixth driving unit is in transmission connection with the rotating ring; the axis of the rotating ring is on the same straight line as the axis of the film guide shaft 663, and the rotating ring is rotatably arranged on the mounting frame; and the blade is fixedly arranged on the rotating ring. When the sixth driving unit operates, it can drive the rotating ring and the blade to rotate along the film guide shaft 663 and cut the film, and the cut film can be pushed forward under the conveying of the subsequent film and sleeved on the surface of the battery cell.

[0146] Finally, it needs to be explained that the fifth battery cell conveying line 61 and the fifth feeding unit 62, the second cleaning unit 63, the fifth detection unit 64, the film sleeving unit 66 and the fifth discharging unit 67 are all two groups and are oppositely arranged.

[0147] As shown in Figure 27 The sixth production device 7 includes two sixth battery cell conveying lines 71, and the two sides of each sixth battery cell conveying line 71 are respectively provided with a material incoming code scanning station, a code spraying station, an end face detection station, a length detection station, a film sleeving detection station, a diameter detection station, a weighing station and a second rejection station. Each sixth battery cell conveying line 71 is arranged on one side of the battery cell main conveying line 1 and sequentially passes through the material incoming code scanning station, the code spraying station, the end face detection station, the length detection station, the film sleeving detection station, the diameter detection station, the weighing station and the second rejection station to convey the battery cell.

[0148] The sixth feeding unit 72 is provided with two fourth turnover feeding components corresponding to the two sixth battery cell conveying lines 71, which are used to turn the vertical battery cell on the battery cell main conveying line 1 into a horizontal position and convey it to the corresponding sixth battery cell conveying line 71 in a longitudinal arrangement; the sixth feeding unit 72 can also use an industrial robot for feeding;

[0149] The code scanning unit 73 is a code scanner arranged at the material incoming code scanning station to scan the code engraved on the battery cell by the code printing unit 56;

[0150] The code spraying unit 74 is arranged at the code spraying station to spray code on the battery cell and scan the sprayed code; specifically, it includes a code sprayer and a code scanner, the code sprayer sprays code on the battery cell first, and the code scanner scans the code; wherein the code sprayer can also be a laser code printer;

[0151] The end face detection unit 75 is a visual detection device arranged at the end face detection station and used to detect the end face of the battery cell. The visual detection device is specifically a CCD visual detection device. The length detection unit 76 is arranged at the length detection station and used to detect the length of the battery cell. Specifically, the length detection unit 76 can be a photoelectric sensor. The film detection unit 77 is arranged at the film detection station and used to detect the film defect of the battery cell. Specifically, the film detection unit 77 can be a 2.5D line scanning camera. The diameter detection unit 78 is arranged at the diameter detection station and used to detect the diameter of the battery cell. Specifically, the diameter detection unit 78 can be a photoelectric sensor. The weighing unit 79 is arranged at the weighing station and used to detect the weight of the battery cell. Specifically, the weighing station can be an electronic belt scale. The sixth rejection unit 701 is arranged at the second rejection station and used to reject the product that fails to pass the detection at any one of the ink-jet station, the end face detection station, the length detection station, the film detection station, the diameter detection station and the weighing station. The sixth rejection unit 701 can adopt a multi-axis industrial pick-and-place robot. The sixth unloading unit 702 includes a fourth turnover unloading component and is used to turn over the horizontal battery cell on the sixth battery cell conveying line 71 into a vertical posture and place the battery cell on the battery cell main conveying line 1.

[0152] As shown in Figure 28 , Figure 29 The first turnover feeding component, the second turnover feeding component, the third turnover feeding component, the fourth turnover feeding component, the first turnover unloading component, the second turnover unloading component, the third turnover unloading component and the fourth turnover unloading component all include a turnover mechanism 8 and a moving mechanism 9.

[0153] The moving mechanism 9 is provided with a first grabbing component 91 and a second grabbing component 92. The first grabbing component 91 and the second grabbing component 92 are arranged side by side and have a lifting function for grabbing the battery cell. The moving mechanism 9 is used to drive the first grabbing component 91 and the second grabbing component 92 to be alternatively transferred above the turnover mechanism 8, the battery cell main conveying line 1 and the corresponding battery cell conveying line. The first grabbing component 91 is used to grab the vertically placed battery cell on the battery cell main conveying line 1 and transfer the battery cell into the turnover mechanism 8. The second grabbing component 92 is used to grab the horizontally placed battery cell on the corresponding battery cell conveying line and transfer the battery cell onto the battery cell main conveying line 1. Figure 20It can be seen that the first grabbing component 91 is provided with vertical clamping claws, the distance between which corresponds to the width of the battery cell, for grabbing the vertically arranged battery cell; the turnover mechanism 8 is used to adjust the vertically arranged battery cell to a horizontal posture; the second grabbing component 92 is used to grab the battery cell in the horizontal posture in the turnover mechanism 8 and transfer it to the corresponding battery cell conveying line in the posture, and the second grabbing component 92 is provided with horizontal clamping claws, the distance between which corresponds to the length of the battery cell, for grabbing the horizontally arranged battery cell. The turnover mechanism 8 includes a battery cell positioning block 81 and a pressing block 82. The battery cell positioning block 81 is provided with a push head for contacting the battery cell, and the push head is conical for abutting against the battery cell. The battery cell positioning block 81 is provided with a receiving part corresponding to the battery cell, and the vertically arranged battery cell can be arranged in the receiving part;

[0154] Further, the first driving unit 83 is used to drive the battery cell positioning block 81 and the battery cell in it to rotate by ninety degrees, for adjusting the vertically arranged battery cell to a horizontal posture. The second driving unit 84 is used to drive the pressing block 82 to move towards the battery cell in the horizontal posture and press the battery cell, for regularizing the battery cell in the horizontal posture and making it uniformly arranged, so as to facilitate the grabbing and transferring of the second grabbing component 92.

[0155] As Figure 30As shown, the application also discloses a production process of a cylindrical battery based on the above-mentioned cylindrical battery automatic assembly line, which comprises the following steps: S100, welding a negative current collector disc to a negative electrode of a battery cell by a first production device 2; the battery cell main conveying line 1 transports the battery cell to the first production station, and the first production device 2 can weld the negative current collector disc to the negative electrode of the battery cell; S200, after the battery cell with the welded negative current collector disc is put into a shell, an outer insulation sheet is sequentially fed to the negative electrode end of the battery cell, a nut is locked on the negative electrode post of the battery cell (the negative electrode post is a threaded post), and the nut is welded with the negative electrode post of the battery cell; the battery cell main conveying line 1 transports the battery cell from the first production station to the second production station, the second production device can push the battery cell with the welded negative current collector disc into the shell until the bottom of the shell, then the outer insulation sheet is arranged on the negative electrode of the battery cell, the nut is locked on the negative electrode post of the battery cell, and finally the nut is welded with the negative electrode post of the battery cell; S300, welding a positive current collector disc to the positive electrode of the battery cell with the welded nut by a third production device 4; the battery cell main conveying line 1 transports the battery cell from the second production station to the third production station, and the third production device 4 can weld the positive current collector disc to the positive electrode of the battery cell; S400, cleaning the battery cell injection hole of the battery cell with the welded positive current collector disc and welding a sealing nail to the battery cell injection hole by a fourth production device 5; the battery cell main conveying line 1 transports the battery cell from the third production station to the fourth production station, and the fourth production device 5 first cleans the battery cell injection hole, and then welds the sealing nail into the battery cell injection hole after the cleaning is completed; S500, cleaning the surface of the battery cell with the welded sealing nail and sleeving a film on the surface of the battery cell by a fifth production device 6; the battery cell main conveying line 1 transports the battery cell from the fourth production station to the fifth production station, and the fifth production device 6 first cleans the surface of the battery cell, and then sleeves the film on the surface of the battery cell after the cleaning is completed; S600, quality detection of the battery cell with the sleeved film by a sixth production device 7; the battery cell main conveying line 1 transports the battery cell from the fifth production station to the sixth production station, and the sixth production device 7 can perform overall quality detection on the battery cell after the film is sleeved.

[0156] In the technical solution of the application, the first production device 2, the second production device 3, the third production device 4, the fourth production device 5, the fifth production device 6 and the sixth production device 7 sequentially perform negative current collector disc welding, battery cell shell entering, outer insulation sheet feeding, battery cell nut locking, nut and battery cell post welding, positive current collector disc welding, sealing nail welding, battery cell film sleeving and battery cell detection on the battery cell in the transportation process of the battery cell main conveying line 1, so that the automatic, efficient and accurate production of the cylindrical battery is realized, the number of times of transfer of parts between different production lines and different production workshops is effectively reduced, and the probability of defective products and waste products caused by the transfer is reduced.

[0157] In the present embodiment, step S100 comprises:

[0158] The incoming material is put on line, and the battery cell is put on line to the first battery cell conveying line 21 in a horizontal posture. The negative electrode current collector is conveyed to the negative electrode current collector welding station through the negative electrode current collector feeding unit 23. The negative electrode insulating sheet is conveyed to the negative electrode insulating sheet pasting station through the negative electrode insulating sheet feeding unit 24.

[0159] The battery cell main conveying line 1 transports the battery cell to the first production station. The first battery cell conveying line 21 transports the battery cell to the negative electrode current collector welding station. The negative electrode current collector is put on line to the negative electrode current collector welding station and waits for welding with the battery cell.

[0160] The negative electrode current collector is welded. The battery cell conveyed by the first battery cell conveying line 21 is received by the battery cell transfer tool 251 and transferred to the negative electrode current collector pressing tool 252. The negative electrode current collector conveyed by the negative electrode insulating sheet feeding unit 24 is received by the negative electrode current collector feeding tool 253 and transferred to the negative electrode current collector pressing tool 252. The negative electrode current collector pressing tool 252 receives the negative electrode current collector conveyed by the negative electrode current collector feeding unit 23 and presses the negative electrode current collector to the end of the battery cell on the battery cell transfer tool 251. Then, the negative electrode current collector welding assembly 254 welds the negative electrode current collector to the negative electrode of the battery cell.

[0161] The first battery cell conveying line 21 transports the battery cell with the welded negative electrode current collector to the first detection station. The end of the battery cell with the welded negative electrode current collector is visually detected and short-circuit detected by the first detection unit 26.

[0162] The first battery cell conveying line 21 transports the battery cell from the first detection station to the positive electrode coating station. The positive electrode of the battery cell is coated by the positive electrode coating unit 27.

[0163] The first battery cell conveying line 21 transports the battery cell from the positive electrode coating station to the negative electrode coating station. In this process, the first battery cell conveying line 21 drives the battery cell to pass through the battery cell turning unit 28. The battery cell with the coated positive electrode is turned by 180° by the battery cell turning unit 28.

[0164] The negative electrode insulating sheet is pasted. The negative electrode insulating sheet pasting station is arranged at the same position of the first battery cell conveying line 21 as the negative electrode coating station. The negative electrode insulating sheet is picked up by the negative electrode insulating sheet feeding tool 292 and conveyed to the negative electrode insulating sheet pressing tool 291. The negative electrode insulating sheet pressing tool 291 presses the negative electrode insulating sheet to the negative electrode end of the battery cell after picking up the negative electrode insulating sheet. Then, the negative electrode of the battery cell is coated by the negative electrode coating unit 201.

[0165] The first battery cell conveying line 21 conveys the battery cell from the positive electrode rubber coating station to the battery cell rubber coating receiving station, and the battery cell end part after rubber coating is received by the battery cell rubber coating receiving unit 202;

[0166] The first battery cell conveying line 21 drives the battery cell after rubber coating to continue to move through the first material unloading unit 203, and the battery cell after rubber coating is turned over to a vertical posture by the first material unloading unit 203 and placed on the battery cell main conveying line 1.

[0167] The first battery cell conveying line 21 drives the battery cell after rubber coating to continue to move through the first material unloading unit 203, and the battery cell after rubber coating is turned over to a vertical posture by the first material unloading unit 203 and placed on the battery cell main conveying line 1.

[0168] S111, the first adapter disc 2511 and the second adapter disc 2512 are sequentially connected with the first battery cell conveying line 21;

[0169] S112, the first welding part 25111 and the first buffer part 25112 on the first adapter disc 2511 are alternately connected with the first battery cell conveying line 21, and the second welding part 25121 and the second buffer part 25122 on the second adapter disc 2512 are alternately connected with the first battery cell conveying line 21; when the buffer part on one adapter disc is connected with the first battery cell conveying line 21, the welding part on the other adapter disc is synchronously connected with the first battery cell conveying line 21, and the buffer part and the welding part are connected;

[0170] S113, the negative electrode current collector disc welding assembly 254 welds the battery cell in the welding part in the non-connection state.

[0171] The negative electrode current collector disc feeding tool 253 works in the following steps:

[0172] S121, the negative electrode current collector disc is picked up by the first material taking part 2531 conveyed from the negative electrode current collector disc feeding unit 23 and transferred to the negative electrode current collector disc positioning part 2532, and the position of the current collector disc is adjusted; S122, the negative electrode current collector disc in the negative electrode current collector disc positioning part 2532 is picked up by the negative electrode current collector disc material distribution part 2533 and transferred to the negative electrode current collector disc turning part 2534 corresponding to the battery cell; S123, the negative electrode current collector disc is adjusted in posture by the negative electrode current collector disc turning part 2534, and the position of the negative electrode current collector disc is adjusted to correspond to the negative electrode current collector disc pressing tool 252.

[0173] The negative electrode insulating sheet feeding tool 292 works in the following steps:

[0174] S131, pick up the negative electrode insulation sheet on the negative electrode insulation sheet feeding unit 24 by the second material taking component 2921, and move it horizontally to the primary positioning component 2922 for primary positioning; S132, pick up the negative electrode insulation sheet in the primary positioning component 2922 by the negative electrode insulation sheet distributing component 2923, and move it horizontally to the secondary positioning component 2925 for secondary positioning; S133, pick up the negative electrode insulation sheet in the secondary positioning component 2925 by the negative electrode insulation sheet turnover component 2924, and turn over the negative electrode insulation sheet to a vertical posture, and move the negative electrode insulation sheet in the vertical posture, so that the position of the negative electrode insulation sheet corresponds to the negative electrode insulation sheet pressing tool 291.

[0175] In the embodiment, step S200 comprises:

[0176] The shell conveying line 32 conveys the shell to the shell-into-cell station, and the cell main conveying line 1 transports the cell to the second production station; the shell-into-cell unit 36 first conveys the shell to the second cell conveying line 31 in a posture with the opening facing downward, and then moves the cell in a vertical posture to below the corresponding shell, and pushes the cell upward into the corresponding shell;

[0177] The second cell conveying line 31 transports the cell after the shell-into-cell operation to the outer insulation sheet feeding station, the outer insulation sheet feeding unit 34 conveys the outer insulation sheet to the outer insulation sheet feeding station, the outer insulation sheet feeding unit 37 sucks the outer insulation sheet from the outer insulation sheet feeding unit 34, and transfers the outer insulation sheet to directly above the corresponding cell, and moves the outer insulation sheet downward, so that the outer insulation sheet is sleeved on the negative electrode pole of the cell;

[0178] The second cell conveying line 31 transports the cell from the outer insulation sheet feeding station to the cell screw locking station, the nut feeding unit 35 conveys the nut to the cell screw locking station, the cell screw locking unit 38 picks up a plurality of nuts, and screws the nuts onto the negative electrode poles of a plurality of cells to be processed;

[0179] The second cell conveying line 31 transports the cell from the cell screw locking station to the cell screw welding station, and the screw welding unit 39 welds the screw and the negative electrode pole of the cell;

[0180] The second cell conveying line 31 transports the cell from the cell screw welding station to the second detection station, and the second detection unit detects the locking effect of the screw and the negative electrode pole of the cell before the screw is welded, and detects the welding effect of the screw and the negative electrode pole of the cell after the screw is welded;

[0181] The second cell conveying line 31 drives the cell after the second detection station to continue to move and pass through the second unloading unit 303, and the second unloading unit 303 places the cell in a vertical posture on the cell main conveying line 1.

[0182] The second cell conveying line 31 is provided with a shell carrier 321, and the cell-into-shell unit 36 works in the following steps:

[0183] S211, the shell on the shell feeding assembly 361 is clamped, and the shell is conveyed to the shell carrier 321 in an open downward posture; S212, the second cell conveying line 31 drives the shell carrier 321 loaded with the shell to move to the vertical cell-into-shell assembly 362; S213, the vertical cell-into-shell assembly 362 first receives the vertical cell on the second feeding unit 33 through the cell feeding component 3621 and moves the cell to the lower side of the shell carrier 321 in a vertical posture, then clamps and positions the shell in the shell carrier 321 through the shell positioning component 3623, and pushes the cell into the shell from bottom to top through the cell pushing component 3622, completing the vertical cell-into-shell.

[0184] In this embodiment, step 400 includes: feeding the cell in a vertical posture to the fourth cell conveying line 51, and conveying the sealing nail to the nail supply station through the sealing nail feeding unit 54.

[0185] The cell main conveying line 1 transports the cell to the fourth production station, the fourth cell conveying line 51 transports the cell to the first cleaning station, and the first cleaning unit 53 cleans the liquid injection hole of the cell.

[0186] The fourth cell conveying line 51 transports the cell from the first cleaning station to the sealing nail welding station, and the sealing nail welding unit 55 welds the sealing nail in the liquid injection hole of the cell.

[0187] The fourth cell conveying line 51 transports the cell from the sealing nail welding station to the code printing station, and the code printing unit 56 performs laser code printing on the cell.

[0188] The fourth cell conveying line 51 transports the cell from the code printing station to the fourth detection station, and the fourth detection unit 57 detects the weld of the sealing nail.

[0189] The fourth cell conveying line 51 drives the cell after the fourth detection station to continue to move and pass through the fourth unloading unit 58, and the fourth unloading unit 58 places the cell in a vertical posture on the cell main conveying line 1.

[0190] In this embodiment, step 500 includes:

[0191] Feeding the cell in a horizontal posture to the fifth cell conveying line 61.

[0192] The fifth battery cell conveying line 61 conveys the battery cell to the second cleaning station, and the end surface and the cylindrical surface of the battery cell are cleaned by the second cleaning unit 63;

[0193] The fifth battery cell conveying line 61 conveys the battery cell from the second cleaning station to the first rejection station, and in this process, the fifth battery cell conveying line 61 drives the battery cell to pass through the fifth detection unit 64 to detect the dirt, scratches and impurities on the cylindrical surface of the battery cell;

[0194] The unqualified products are rejected by the fifth rejection unit 65 after being detected by the fifth detection unit 64.

[0195] The fifth battery cell conveying line 61 conveys the battery cell from the first rejection station to the film sleeving station, and the film is sleeved on the outer surface of the battery cell by the film sleeving unit 66.

[0196] The fifth battery cell conveying line 61 drives the battery cell after being sleeved to continue to move and pass through the fifth unloading unit 67, and the battery cell is placed in a vertical posture on the main battery cell conveying line 1 by the fifth unloading unit 67.

[0197] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0198] It should be noted that if the invention embodiments involve directional indications (such as up and down), the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0199] In addition, if the invention embodiments involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, "multiple" means two or more. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the invention.

Claims

1. A cylindrical battery automatic assembly line characterized by comprising: The cylindrical battery automatic assembly line sequentially forms a first production station, a second production station, a third production station, a fourth production station, a fifth production station and a sixth production station along the direction of the battery cell processing, and comprises: a battery cell main conveying line (1) sequentially passing through the first production station, the second production station, the third production station, the fourth production station, the fifth production station and the sixth production station, and used for conveying the semi-finished product of the battery cell; a first production device (2) arranged at the first production station and used for welding the negative current collector of the battery cell; a second production device (3) arranged at the second production station and used for housing the battery cell, and sequentially loading the outer insulating sheet to the negative electrode of the battery cell, locking the nut on the negative electrode pole of the battery cell and welding the nut and the negative electrode pole of the battery cell; a third production device (4) arranged at the third production station and used for welding the positive current collector of the battery cell; a fourth production device (5) arranged at the fourth production station and used for cleaning the liquid injection hole of the battery cell and welding the sealing nail to the liquid injection hole of the battery cell; a fifth production device (6) arranged at the fifth production station and used for cleaning the surface of the battery cell and sleeving the film on the surface of the battery cell; a sixth production device (7) arranged at the sixth production station and used for quality detection of the battery cell; The second production device (3) forms a battery cell housing station, an outer insulating sheet loading station, a battery cell screw locking station, a battery cell screw welding station and a second detection station, and comprises: a second battery cell conveying line (31) sequentially passing through the battery cell housing station, the outer insulating sheet loading station, the battery cell screw locking station, the battery cell screw welding station and the second detection station, and used for conveying the battery cell; a shell conveying line (32) used for conveying the shell of the battery cell to the battery cell housing station; a second loading unit (33) used for conveying the battery cell on the battery cell main conveying line (1) to the battery cell housing station in a vertical posture; an outer insulating sheet supply unit (34) used for conveying the outer insulating sheet to the outer insulating sheet loading station; a nut supply unit (35) used for supplying the nut to the battery cell screw locking station; a battery cell housing unit (36) arranged at the battery cell housing station and comprising a shell loading assembly (361) and a vertical housing assembly (362); the shell loading assembly (361) is used for clamping the shell on the shell conveying line (32) and conveying the shell to the second battery cell conveying line (31) in an open-down posture; the vertical housing assembly (362) is used for receiving the vertical battery cell on the second loading unit (33) and moving the battery cell to the right below the shell in a vertical posture, and pushing the battery cell upward into the shell. An outer insulation sheet feeding unit (37) is arranged at the outer insulation sheet feeding station and includes an outer insulation sheet transferring assembly (371) and a guide assembly (372). The outer insulation sheet transferring assembly (371) is used to suck the outer insulation sheet from the outer insulation sheet feeding unit (34) and transfer the outer insulation sheet to the top of the guide assembly (372) and drive the outer insulation sheet to move downward. The second battery cell conveying line (31) carries the battery cell with the shell into the guide assembly (372) and makes the negative electrode end of the battery cell located below the outer insulation sheet transferring assembly (371). The guide assembly (372) is used to guide the downward moving outer insulation sheet and abut the battery cell from bottom to top, so as to feed the outer insulation sheet to the negative electrode end of the battery cell. A battery cell lock screw unit (38) is arranged at the battery cell lock screw station and is used to pick up a plurality of nuts and tighten the nuts to a plurality of battery cells to be processed. A screw welding unit (39) is arranged at the battery cell screw welding station and is used to weld the screw and the negative electrode pole of the battery cell. A second detection unit is arranged at the second detection station and is used to detect the locking effect of the screw and the negative electrode pole of the battery cell before the screw is welded and detect the welding effect of the screw and the negative electrode pole of the battery cell after the screw is welded. A second feeding unit (303) is used to convey the battery cell on the second battery cell conveying line (31) to the battery cell main conveying line (1) in a specified posture.

2. The cylindrical battery automatic assembly line according to claim 1, wherein The first production device (2) is formed with a negative electrode current collector plate welding station, a first detection station, a positive electrode coating station, a negative electrode insulation sheet attaching station, a negative electrode coating station and a battery cell coating receiving station. The first production device (2) includes: A first battery cell conveying line (21) sequentially passes through the negative electrode current collector plate welding station, the first detection station, the positive electrode coating station, the negative electrode insulation sheet attaching station, the negative electrode coating station and the battery cell coating receiving station and is used to convey the battery cell. A first feeding unit (22) is used to convey the battery cell on the battery cell main conveying line (1) to the first battery cell conveying line (21) in a horizontal longitudinal arrangement posture. A negative electrode current collector plate feeding unit (23) is used to convey the negative electrode current collector plate to the negative electrode current collector plate welding station. A negative electrode insulation sheet feeding unit (24) is used to convey the negative electrode insulation sheet to the negative electrode insulation sheet attaching station. The negative electrode current collector disc welding unit (25) is arranged at the negative electrode current collector disc welding station and comprises a battery cell transfer tool (251), a negative electrode current collector disc pressing tool (252), a negative electrode current collector disc feeding tool (253), and a negative electrode current collector disc welding assembly (254). The battery cell transfer tool (251) can be switched between the first battery cell conveying line (21) and the negative electrode current collector disc pressing tool (252) to transfer the battery cell to be welded to the corresponding negative electrode current collector disc pressing tool (252) and transfer the battery cell welded by the negative electrode current collector disc pressing tool (252) back to the first battery cell conveying line (21). The negative electrode current collector disc pressing tool (252) is used to place the negative electrode current collector disc and press the negative electrode current collector disc to the end of the battery cell. The negative electrode current collector disc feeding tool (253) is used to provide the negative electrode current collector disc to the negative electrode current collector disc pressing tool (252). The negative electrode current collector disc welding assembly (254) is used to weld the negative electrode current collector disc pressed to the end of the battery cell. The first detection unit (26) is arranged at the first detection station and is used for visual detection and short circuit detection of the end of the battery cell after the negative electrode current collector disc welding. The positive electrode rubber coating unit (27) is arranged at the positive electrode rubber coating station and is used for positive electrode rubber coating of the battery cell. The battery cell turning unit (28) is arranged at the positive electrode rubber coating station and is used for turning the battery cell after the positive electrode rubber coating. The negative electrode insulating sheet pasting unit (29) is arranged at the negative electrode insulating sheet pasting station and comprises a negative electrode insulating sheet pressing tool (291) and a negative electrode insulating sheet feeding tool (292). The negative electrode insulating sheet pressing tool (291) is used to pick up the negative electrode insulating sheet and press the negative electrode insulating sheet to the negative electrode end of the battery cell. The negative electrode insulating sheet feeding tool (292) is used to provide the negative electrode insulating sheet to the negative electrode insulating sheet pressing tool (291). The negative electrode rubber coating unit (201) is arranged at the negative electrode rubber coating station and is used for negative electrode rubber coating of the battery cell. The battery cell rubber collecting unit (202) is arranged at the battery cell rubber collecting station and is used for rubber collecting treatment of the end of the battery cell after the rubber coating. The first discharging unit (203) is used to convey the battery cell on the first battery cell conveying line (21) to the battery cell main conveying line (1) in a specified posture.

3. The cylindrical battery automatic assembly line according to claim 1, wherein The third production device (4) is formed with a pre-point welding station, a full welding station, a penetration welding station, a rolling edge station, and a third detection station. The third production device (4) comprises: The third battery cell conveying line (41) sequentially passes through the pre-point welding station, the full welding station, the penetration welding station, the rolling edge station, and the third detection station to convey the battery cell. The third feeding unit (42) is used to convey the battery cell on the battery cell main conveying line (1) to the second battery cell conveying line (31) in a horizontal longitudinal arrangement posture. The positive electrode current collector disc feeding unit (43) is used to convey the positive electrode current collector disc to the pre-point welding station. A pre-point welding unit (44) is arranged at the pre-point welding station and includes a positive electrode current collector plate transfer assembly (441), a positive electrode current collector plate pressing tool, and a pre-point welding device (442). The positive electrode current collector plate transfer assembly (441) is used to transfer the positive electrode current collector plate to the pressing head of the positive electrode current collector plate pressing tool. The positive electrode current collector plate pressing tool is used to place the positive electrode current collector plate and press the positive electrode current collector plate to the end of the battery cell. The pre-point welding device (442) is used to pre-point weld the positive electrode current collector plate pressed to the end of the battery cell. A full welding unit (45) is arranged at the full welding station and is used to full weld the end of the battery cell after pre-point welding and the positive electrode current collector plate. A penetration welding unit (46) is arranged at the penetration welding station and is used to penetration weld the end of the battery cell after full welding. An edge rolling unit (47) is arranged at the edge rolling station and is used to remove the welding points and welding slag at the welding seam of the battery cell after welding. A third detection unit (48) is arranged at the third detection station and is used to detect the welding effect of the battery cell after welding. A third unloading unit (49) is used to transport the battery cell on the third battery cell conveying line (41) to the battery cell main conveying line (1) in a specified posture.

4. The cylindrical battery automatic assembly line according to claim 1, wherein The fourth production device (5) is formed with a first cleaning station, a nail supply station, a sealing nail welding station, a code printing station, and a fourth detection station. The fourth production device (5) includes: A fourth battery cell conveying line (51) sequentially passes through the first cleaning station, the nail supply station, the sealing nail welding station, the code printing station, and the fourth detection station, and is used to convey the battery cell. A plurality of rows of battery cell carriers (511) are arranged on the fourth battery cell conveying line (51) and are used to carry a plurality of rows of battery cells and travel with the fourth battery cell conveying line (51). A fourth loading unit (52) is used to transport the battery cell on the battery cell main conveying line (1) to the plurality of rows of battery cell carriers (511) in a vertical posture. A first cleaning unit (53) including a laser cleaning mechanism is arranged at the first cleaning station and is used to clean the liquid injection hole of the battery cell on the plurality of rows of battery cell carriers (511) that moves to the first cleaning station. A sealing nail loading unit (54) is arranged at the nail supply station and is used to pick up the sealing nail and move the sealing nail to the sealing nail welding station. A sealing nail welding unit (55) including a sealing nail welding mechanism is arranged at the sealing nail welding station and is used to weld the sealing nail at the liquid injection hole of the battery cell. A code printing unit (56) including a laser code printing mechanism is arranged at the code printing station and is used to laser code print the battery cell. A fourth detection unit (57) is arranged at the fourth detection station and is used to detect the welding seam of the sealing nail. A fourth unloading unit (58) is used to transport the battery cell on the fourth battery cell conveying line (51) to the battery cell main conveying line (1) in a specified posture.

5. The cylindrical battery automatic assembly line according to claim 1, wherein The fifth production device (6) is formed with a second cleaning station, a fifth detection station, and a film sleeving station. The fifth production device (6) includes: A fifth battery cell conveying line (61) sequentially passes through the second cleaning station, the fifth detection station, and the film sleeving station, and is used to convey the battery cell. A fifth feeding unit (62) is configured to feed the battery cell on the main battery cell conveying line (1) to the fifth battery cell conveying line (61); A second cleaning unit (63) is arranged at the second cleaning station, and an end face cleaning mechanism (631) and a cylindrical surface cleaning mechanism (632) are arranged for cleaning the end face and the cylindrical surface of the battery cell, respectively; A fifth detection unit (64) is configured to visually detect the cylindrical surface of the battery cell; A film sleeving unit (66) is arranged at the film sleeving station to sleeve the film on the surface of the battery cell; A fifth discharging unit (67) is configured to feed the battery cell on the fifth battery cell conveying line (61) to the main battery cell conveying line (1) in a specified posture.

6. The cylindrical battery automatic assembly line according to claim 4, wherein The sixth production device (7) is formed with a material incoming code scanning station, a code spraying station, an end face detection station, a length detection station, a film sleeving detection station, a diameter detection station, a weighing station, and a second rejection station. The sixth production device (7) comprises: A sixth battery cell conveying line (71) sequentially passes through the material incoming code scanning station, the code spraying station, the end face detection station, the length detection station, the film sleeving detection station, the diameter detection station, the weighing station, and the second rejection station, and is configured to convey the battery cell; A sixth feeding unit (72) is configured to feed the battery cell on the main battery cell conveying line (1) to the sixth battery cell conveying line (71) in a horizontal longitudinal arrangement posture; A code scanning unit (73) is arranged at the material incoming code scanning station and is configured to scan the code engraved on the battery cell by the code printing unit (56); A code spraying unit (74) is arranged at the code spraying station and is configured to spray code on the battery cell and scan the sprayed code; An end face detection unit (75) is arranged at the end face detection station and is configured to detect the end face of the battery cell; A length detection unit (76) is arranged at the length detection station and is configured to detect the length dimension of the battery cell; A film sleeving detection unit (77) is arranged at the film sleeving detection station and is configured to detect the film sleeving defects of the battery cell; A diameter detection unit (78) is arranged at the diameter detection station and is configured to detect the diameter dimension of the battery cell; A weighing unit (79) is arranged at the weighing station and is configured to detect the weight of the battery cell; A sixth discharging unit (702) is configured to feed the battery cell on the sixth battery cell conveying line (71) to the main battery cell conveying line (1) in a specified posture.

7. The cylindrical battery automatic assembly line according to claim 2, wherein The battery cell transfer tool (251) comprises a first connecting disc (2511) and a second connecting disc (2512) connected with the first battery cell conveying line (21); The first connecting disc (2511) is provided with a first welding portion (25111) and a first buffer portion (25112), and the first welding portion (25111) and the first buffer portion (25112) are alternately connected with the first battery cell conveying line (21); The second connecting disc (2512) is provided with a second welding portion (25121) and a second buffer portion (25122), and the second welding portion (25121) and the second buffer portion (25122) are alternately connected with the first battery cell conveying line (21); The first welding part (25111) and the second welding part (25122) are connected with the first cell conveying line (21) at the same time, and the first welding part (25111) and the second welding part (25122) are connected with each other; the first buffering part (25112) and the second welding part (25121) are connected with the first cell conveying line (21) at the same time, and the first buffering part (25112) and the second welding part (25121) are connected with each other; The negative current collector pressing tool (252) is used to press the negative current collector into the first welding part (25111) and the second welding part (25121) of the cell in a non-connection state.

8. The cylindrical battery automatic assembly line according to claim 5, wherein The film covering unit (66) is arranged on the side of the fifth cell conveying line (61); The film covering unit (66) comprises a tray (661), a feeding wheel (662), a film guide shaft (663), a cutter (664), a clamping part (665) and a mounting frame. The film belt is provided on the tray (661), and the film belt is pulled to the film guide shaft (663) through the feeding wheel (662). The film guide shaft (663) is used to support the film belt, and the film belt is sleeved on the film guide shaft (663). The clamping part (665) is used to clamp the film belt to move on the film guide shaft (663), and the cutter (664) is used to cut the film belt.

9. A production process of a cylindrical battery based on the cylindrical battery automatic assembly line according to any one of claims 1 to 8, characterized by, The production process of the cylindrical battery comprises the following steps: Welding the negative current collector to the negative electrode of the cell by the first production device (2); After the cell with the welded negative current collector is put into the shell by the second production device (3), the outer insulating sheet is sequentially fed to the negative electrode of the cell, the nut is locked on the negative electrode post of the cell, and the nut and the negative electrode post of the cell are welded; Welding the positive current collector to the positive electrode of the cell with the welded nut by the third production device (4); Cleaning the cell injection hole of the cell with the welded positive current collector and welding the sealing nail to the cell injection hole by the fourth production device (5); Cleaning the surface of the cell with the welded sealing nail and sleeving the film on the surface of the cell by the fifth production device (6); Quality testing of the cell with the sleeved film by the sixth production device (7).

Images