Method and device for assembling cylindrical battery

Abstract

The invention discloses a cylindrical battery assembly method and device, and relates to the technical field of cylindrical batteries, the cylindrical battery assembly method comprises the following steps: S1, cleaning the inner bottom wall of a shell; s2, the opening of the shell is cleaned; s3, the inner circumferential wall of the shell is cleaned; s4, the outer bottom wall of the shell is cleaned; s5, pushing the pretreated battery cell into the shell to form a pre-formed battery; s6, point bottom penetration welding is conducted on the pre-formed battery, so that one end of the pretreated battery cell is connected with the inner bottom wall of the shell; s7, the cover cap and the open end of the shell are subjected to cover closing pre-spot welding; and S8, performing seal welding on the cap and the open end of the shell to complete battery assembly. According to the scheme, all parts of the shell are cleaned respectively, pretreatment preparation is made for follow-up seal welding and penetration welding, the quality of follow-up welding is guaranteed, and the percent of pass of finished products is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of cylindrical batteries, and in particular to an assembly method and device for cylindrical batteries. Background Art

[0002] During the assembly process of cylindrical battery shells, the shells often need to be pre-treated to prepare for subsequent processes. Prior art generally uses negative pressure dust removal or reagent immersion to clean the entire shell before assembling the shell and the battery cell to achieve the effect of pre-treatment. This method has poor cleaning effect and cannot provide targeted treatment for subsequent processes. Summary of the invention

[0003] The main purpose of the present invention is to provide a cylindrical battery assembly method and device, aiming to solve the problem of poor shell cleaning effect in the current cylindrical battery assembly process.

[0004] To achieve the above object, the present invention provides a cylindrical battery assembly method for assembling a cylindrical battery, wherein the cylindrical battery comprises a shell, a battery cell and a cap, and one end of the shell is open. The cylindrical battery assembly method comprises the following steps:

[0005] S1, cleaning the inner bottom wall of the shell;

[0006] S2, cleaning the opening of the shell;

[0007] S3, cleaning the inner peripheral wall of the shell;

[0008] S4, cleaning the outer bottom wall of the shell;

[0009] S5, pushing the pre-treated battery cell into the shell to form a primary formed battery;

[0010] S6, performing spot bottom penetration welding on the initially formed battery to connect one end of the pre-treated battery cell to the inner bottom wall of the shell;

[0011] S7, pre-spot welding the cover cap to the open end of the shell;

[0012] S8. Sealing and welding the cap and the open end of the shell to complete the battery assembly.

[0013] In one embodiment, the step S1, cleaning the inner bottom wall of the shell, comprises:

[0014] The inner bottom wall of the shell is laser processed by a laser so as to clean and roughen the inner bottom wall of the shell.

[0015] In one embodiment, a liquid injection hole is provided on the inner bottom wall of the shell;

[0016] The step S1, cleaning the inner bottom wall of the shell, further comprises:

[0017] While the inner bottom wall of the shell is laser processed by a laser, negative pressure adsorption is performed on the injection hole of the inner bottom wall of the shell to clean the welding slag.

[0018] In one embodiment, the step S2, cleaning the opening of the housing, comprises:

[0019] The opening end of the shell is laser processed by a laser to clean and roughen the opening of the shell.

[0020] In one embodiment, the step S3, cleaning the inner circumferential wall of the shell, comprises:

[0021] The negative pressure device is extended into the inner cavity of the shell to perform negative pressure dust removal on the inner cavity of the shell.

[0022] In one embodiment, the step S4, cleaning the outer bottom wall of the shell, comprises:

[0023] The outer bottom wall of the shell is laser processed by a laser so as to clean and roughen the outer bottom wall of the shell.

[0024] In one embodiment, the two ends of the battery core correspond to a first pole and a second pole respectively, and the first pole and the second pole are respectively welded with current collecting plates, wherein the current collecting plate of the first pole is connected to the cap;

[0025] Before the S5, pushing the pre-treated battery cell into the housing to form a primary formed battery, the method includes:

[0026] Align the second pole of the pretreated battery cell with the opening of the shell.

[0027] In one embodiment, before aligning the second pole of the pretreated battery cell with the opening of the shell, the method includes:

[0028] The first pole and / or the second pole welded with the current collecting plate are encapsulated with rubber, and the encapsulated first pole and / or the second pole are subjected to full-pressing treatment.

[0029] In addition, the present invention also provides an assembly device for a cylindrical battery, comprising:

[0030] Shell conveyor line, used to transport shells;

[0031] A cleaning mechanism, comprising a first cleaning device, a second cleaning device, a third cleaning device and a fourth cleaning device arranged at intervals along the extension direction of the shell conveying line, wherein the first cleaning device is used to clean the inner bottom wall of the shell, the second cleaning device is used to clean the opening of the shell, the third cleaning device is used to clean the inner peripheral wall of the shell, and the fourth cleaning device is used to clean the outer bottom wall of the shell;

[0032] Battery cell conveyor line, used to transport battery cells;

[0033] A shell feeding mechanism, provided between the battery cell conveying line and the shell conveying line, for feeding the battery cell into the shell to form the primary formed battery;

[0034] The welding mechanism is used for performing penetration welding and sealing welding on the initially formed battery.

[0035] In one embodiment, the first cleaning device, the second cleaning device, the third cleaning device and the fourth cleaning device are arranged on the same side of the shell conveying line;

[0036] The cylindrical battery assembly device further comprises a flipping mechanism, which is disposed between the third cleaning device and the fourth cleaning device and is used to flip the shell so that the positions of the open end and the closed end of the shell are reversed.

[0037] The technical solution of the present invention ensures the cleanliness of the battery by cleaning the shell before the battery cell is put into the shell, which is convenient for the subsequent assembly of the battery; specifically, firstly, the inner bottom wall of the shell is cleaned to prepare for the subsequent penetration welding, and then the opening of the shell is cleaned to prepare for the subsequent sealing welding, and then the inner circumferential wall of the shell is cleaned. While ensuring the cleanliness of the inner circumferential wall of the shell, the inner bottom wall and the opening of the shell are subjected to secondary treatment to further improve the cleanliness of the inner cavity of the shell, and finally, the outer bottom wall of the shell is cleaned to prepare for the subsequent penetration welding, which complies with the processing flow from inside to outside, ensures the quality of subsequent welding, improves the qualified rate of finished products, and realizes the targeted treatment of the shell cleaning; the final assembly process of the battery is completed by sequentially performing spot bottom penetration welding, cover pre-spot welding and sealing welding on the initially formed battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a flow chart of an embodiment of a cylindrical battery assembly method provided by the present invention;

[0040] Figure 2 A schematic structural diagram of an embodiment of an assembly device for cylindrical batteries provided by the present invention;

[0041] Figure 3 for Figure 1 A schematic diagram of the structure of the first cleaning device;

[0042] Figure 4 for Figure 1 A schematic diagram of the structure of the second cleaning device;

[0043] Figure 5 A structural schematic diagram of an embodiment of a battery core glue laminating device provided by the present invention;

[0044] Figure 6 for Figure 5 A schematic diagram of the structure of the first glue pressing driving mechanism;

[0045] Figure 7 for Figure 5 Structural diagram of the medium pressure glue mechanism;

[0046] Figure 8 for Figure 5 Structural diagram of the middle sheet pressing mechanism and the sheet lifting mechanism;

[0047] Fig. 9 for Figure 5 The front view of the middle sheet pressing mechanism and the sheet lifting mechanism;

[0048] Fig.10 A schematic diagram of a process flow of an embodiment of a battery core gluing method provided by the present invention.

[0049] Description of Figure Numbers:

[0050] 1000. Assembly device for cylindrical battery; 1. Shell conveyor line; 2. Cleaning mechanism; 21. First cleaning device; 22. Second cleaning device; 23. Third cleaning device; 24. Fourth cleaning device; 3. Cell glue pressing device; 31. Cell transfer mechanism; 311. Slide; 312. Support seat; 3121. Claw; 32. Tablet pressing mechanism; 321. Tablet pressing seat; 322. Tablet pressing roller; 33. First glue pressing drive mechanism; 331. First machine base; 332. Pusher mounting plate; 333. First drive cylinder; 334. Drive pusher; 335. Second drive cylinder; 34. Glue pressing mechanism; 341. Presser ; 3411, glue pressing hole; 3412, through hole; 34121, annular protrusion; 34121A, second glue pressing plane; 34122, limiting groove; 342, rubber pushing sleeve; 3421, sleeve body; 34211, limiting rib; 3422, glue pressing rib; 3422A, guide surface; 3422B, first glue pressing plane; 343, mounting seat; 344, centering pressure head; 3441, avoidance cavity; 3442, linear bearing; 345, elastic member; 35, film lifting mechanism; 351, film lifting seat; 352, film lifting roller; 36, second glue pressing drive mechanism; 361, second machine base; 362, third drive cylinder;

[0051] 2000, battery cell; 2001, connecting piece.

[0052] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0055] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0056] During the assembly process of cylindrical battery shells, the shells often need to be pre-treated to prepare for subsequent processes. Prior art generally uses negative pressure dust removal or reagent immersion to clean the entire shell before assembling the shell and the battery cell to achieve the effect of pre-treatment. This method has poor cleaning effect and cannot provide targeted treatment for subsequent processes.

[0057] The main purpose of the present invention is to provide a cylindrical battery assembly method and device, aiming to solve the problem of poor shell cleaning effect in the current cylindrical battery assembly process.

[0058] See also Figure 1 The present invention provides a cylindrical battery assembly method for assembling a cylindrical battery, wherein the cylindrical battery comprises a shell, a battery cell and a cap, and one end of the shell is open. The cylindrical battery assembly method comprises the following steps:

[0059] S1, cleaning the inner bottom wall of the shell;

[0060] S2, cleaning the opening of the shell;

[0061] S3, cleaning the inner peripheral wall of the shell;

[0062] S4, cleaning the outer bottom wall of the shell;

[0063] S5, pushing the pre-treated battery cell into the shell to form a primary formed battery;

[0064] S6, performing spot bottom penetration welding on the initially formed battery to connect one end of the pre-treated battery cell to the inner bottom wall of the shell;

[0065] S7, pre-spot welding the cover cap to the open end of the shell;

[0066] S8. Sealing and welding the cap and the open end of the shell to complete the battery assembly.

[0067] The technical solution of the present invention ensures the cleanliness of the battery by cleaning the shell before the battery cell is put into the shell, which is convenient for the subsequent assembly of the battery; specifically, firstly, the inner bottom wall of the shell is cleaned to prepare for the subsequent penetration welding, and then the opening of the shell is cleaned to prepare for the subsequent sealing welding, and then the inner circumferential wall of the shell is cleaned. While ensuring the cleanliness of the inner circumferential wall of the shell, the inner bottom wall and the opening of the shell are subjected to secondary treatment to further improve the cleanliness of the inner cavity of the shell, and finally, the outer bottom wall of the shell is cleaned to prepare for the subsequent penetration welding, which complies with the processing flow from inside to outside, ensures the quality of subsequent welding, improves the qualified rate of finished products, and realizes the targeted treatment of the shell cleaning; the final assembly process of the battery is completed by sequentially performing spot bottom penetration welding, cover pre-spot welding and sealing welding on the initially formed battery.

[0068] It should be noted that before the pre-treated battery cell is pushed into the shell to form a primary battery, the battery cell and the shell need to be quality inspected separately to ensure that the battery cell corresponds to the shell one by one and to ensure the quality of the finished cylindrical battery.

[0069] In one embodiment of the present invention, the step S1, cleaning the inner bottom wall of the shell, comprises: using a laser to perform laser treatment on the inner bottom wall of the shell to clean and roughen the inner bottom wall of the shell. It is understandable that the laser treatment includes laser cleaning and laser roughening treatment, wherein laser cleaning can remove pollutants, grease, oxide layer or other impurities on the surface of the shell to ensure the quality of subsequent processes, and at the same time can improve the flatness and cleanliness of the welding surface, thereby enhancing the welding strength and reducing the possibility of cold welding or poor welding. Laser roughening treatment can form tiny concave and convex structures on the welding surface, which can increase the actual contact area, thereby improving the bonding strength of the welding area. In this design, by using a laser to clean the inner bottom wall of the shell, the cleanliness of the cleaning and the high precision and controllability of the roughening are guaranteed, and different surface treatment methods can be adopted according to needs, and the laser treatment is highly applicable and can be applied to the surfaces of various materials, including metals, ceramics, plastics, etc. At the same time, the laser treatment is non-contact, and will not cause mechanical stress or damage to the workpiece, thereby reducing the occurrence rate of failures.

[0070] It should be noted that since the laser head of the laser needs to be inserted into the shell for cleaning, it is necessary to first check whether the shape of the shell opening is a perfect circle and whether its size allows the laser head to be inserted before cleaning, so as to avoid interference between the laser head and the shell. At the same time, preliminary quality screening is performed to determine whether the battery cells after subsequent pretreatment can enter the shell smoothly.

[0071] It should also be noted that during the cleaning process, the shell needs to be driven to rotate relative to the laser head. With this arrangement, by rotating the shell, the laser beam can be evenly irradiated to all surfaces to be processed, ensuring that each part can receive the same treatment, avoiding dead corners, and ensuring the consistency and integrity of the processed surface. At the same time, relative motion can also improve work efficiency and speed up the cleaning process, thereby reducing the assembly time of cylindrical batteries. Furthermore, in order to improve efficiency, the laser is provided with multiple lasers, so that the inner bottom walls of multiple shells can be cleaned at the same time.

[0072] It is understandable that the present invention does not limit the specific cleaning method for the inner bottom wall of the shell. In another embodiment of the present invention, by arranging negative pressure adsorption mechanisms at intervals on the laser head of the laser, when the laser head is extended into the inner cavity of the shell, the inner bottom wall of the shell is firstly cleaned by the negative pressure adsorption device for dust removal, and then the inner bottom wall of the shell is roughened by the laser head, and finally the negative pressure adsorption device is activated to perform secondary dust removal and cleaning on the inner bottom wall of the shell to ensure the cleanliness of the inner bottom wall of the shell.

[0073] Furthermore, a liquid injection hole is provided on the inner bottom wall of the shell; S1, cleaning the inner bottom wall of the shell, also includes: while using a laser to perform laser processing on the inner bottom wall of the shell, negative pressure adsorption is performed on the liquid injection hole of the inner bottom wall of the shell to clean the welding slag.

[0074] In one embodiment of the present invention, the step S2, cleaning the opening of the shell, comprises: using a laser to perform laser treatment on the opening end of the shell to clean and roughen the opening of the shell. It is understandable that the laser treatment includes laser cleaning and laser roughening treatment, wherein laser cleaning can remove pollutants, grease, oxide layer or other impurities on the surface of the shell to ensure the quality of subsequent processes, and at the same time can improve the flatness and cleanliness of the welding surface, thereby enhancing the welding strength and reducing the possibility of cold welding or poor welding. Laser roughening treatment can form tiny concave and convex structures on the welding surface, which can increase the actual contact area, thereby improving the bonding strength of the welding area. In this design, by using a laser to clean the opening of the shell, the cleanliness of the cleaning and the high precision and controllability of the roughening are guaranteed, and different surface treatment methods can be adopted according to needs, and the laser treatment is highly applicable and can be applied to the surfaces of various materials, including metals, ceramics, plastics, etc. At the same time, the laser treatment is non-contact, and will not cause mechanical stress or damage to the workpiece, thereby reducing the occurrence rate of failures.

[0075] It should be noted that during the cleaning process, the shell needs to be driven to rotate relative to the laser head. With this arrangement, by rotating the shell, the laser beam can be evenly irradiated to all surfaces to be processed, ensuring that each part can receive the same treatment, avoiding dead corners, and ensuring the consistency and integrity of the processed surface. At the same time, relative motion can also improve work efficiency and speed up the cleaning process, thereby reducing the assembly time of cylindrical batteries. Furthermore, in order to improve efficiency, multiple lasers are provided so that the openings of multiple shells can be cleaned at the same time.

[0076] It is understandable that the present invention does not limit the specific cleaning method for the shell opening. In another embodiment of the present invention, by arranging negative pressure adsorption mechanisms at intervals on the laser head of the laser, when the laser head is extended into the inner cavity of the shell, the opening of the shell is firstly cleaned by the negative pressure adsorption device for dust removal, and then the opening of the shell is roughened by the laser head, and finally the negative pressure adsorption device is activated to perform secondary dust removal and cleaning on the opening of the shell to ensure the cleanliness of the inner bottom wall of the shell.

[0077] In one embodiment of the present invention, the S3, cleaning the inner circumferential wall of the shell, comprises: extending the negative pressure device into the inner cavity of the shell to perform negative pressure dust removal on the inner cavity of the shell. With such a design, by extending the negative pressure device into the inner cavity of the shell, the negative pressure device can not only clean and dust the inner circumferential wall of the shell, but also remove impurities that may be generated due to excessive local temperature when the inner bottom wall and the opening of the shell are roughened, thereby ensuring the cleanliness of the entire inner cavity of the shell. Specifically, the negative pressure device includes a connected air pump and a negative pressure dust removal pipe, and a plurality of negative pressure holes are provided on the negative pressure dust removal pipe, so that during the cleaning process, the negative pressure dust removal pipe is extended into the inner cavity of the shell, and negative pressure dust removal is performed on the inner circumferential wall of the shell through the plurality of negative pressure holes.

[0078] In one embodiment of the present invention, the step S4, cleaning the outer bottom wall of the shell, comprises: using a laser to perform laser treatment on the outer bottom wall of the shell to clean and roughen the outer bottom wall of the shell. It is understandable that the laser treatment includes laser cleaning and laser roughening treatment, wherein laser cleaning can remove pollutants, grease, oxide layer or other impurities on the surface of the shell to ensure the quality of subsequent processes, and at the same time can improve the flatness and cleanliness of the welding surface, thereby enhancing the welding strength and reducing the possibility of cold welding or poor welding. Laser roughening treatment can form tiny concave and convex structures on the welding surface, which can increase the actual contact area, thereby improving the bonding strength of the welding area. In this design, by using a laser to clean the outer bottom wall of the shell, the cleanliness of the cleaning and the high precision and controllability of the roughening are guaranteed, and different surface treatment methods can be adopted according to the needs, and the laser treatment is highly applicable and can be applied to the surfaces of various materials, including metals, ceramics, plastics, etc. At the same time, the laser treatment is non-contact, and will not cause mechanical stress or damage to the workpiece, thereby reducing the occurrence rate of failures.

[0079] It should be noted that during the cleaning process, the shell needs to be driven to rotate relative to the laser head. With this arrangement, by rotating the shell, the laser beam can be evenly irradiated to all surfaces to be processed, ensuring that each part can receive the same treatment, avoiding dead corners, and ensuring the consistency and integrity of the processed surface. At the same time, relative motion can also improve work efficiency and speed up the cleaning process, thereby reducing the assembly time of cylindrical batteries. Furthermore, in order to improve efficiency, the laser is provided with multiple lasers, so that the outer bottom walls of multiple shells can be cleaned at the same time.

[0080] It is understandable that the present invention does not limit the specific cleaning method of the outer bottom wall of the shell. In another embodiment of the present invention, by arranging negative pressure adsorption mechanisms at intervals on the laser head of the laser, when the laser head extends to the outer bottom wall of the shell, the outer bottom wall of the shell is firstly cleaned and dusted by the negative pressure adsorption device, and then the outer bottom wall of the shell is roughened by the laser head, and finally the negative pressure adsorption device is activated to perform secondary dust removal and cleaning on the outer bottom wall of the shell to ensure the cleanliness of the outer bottom wall of the shell.

[0081] Furthermore, the two ends of the battery cell correspond to the first pole and the second pole, respectively, and the first pole and the second pole are respectively welded with current collectors, wherein the current collector of the first pole is connected to the cap; before the pre-treated battery cell is pushed into the shell to form an initial battery, S5 includes: aligning the second pole of the pre-treated battery cell with the opening of the shell. In this way, by aligning the second pole of the pre-treated battery cell with the opening of the shell, preparations are made for the subsequent pre-spot welding and sealing welding of the cover, thereby ensuring the progress of subsequent processes. It should be noted that this scheme does not limit the specific positive and negative poles corresponding to the first pole and the second pole. In the actual assembly process, the positive or negative pole can be selected to be set toward the open end as needed.

[0082] Furthermore, before aligning the second pole of the pretreated battery cell with the opening of the shell, the method includes: encapsulating the first pole and / or the second pole welded with the collector plate, and fully pressing the encapsulated first pole and / or the second pole. In this way, electrical insulation can be provided by encapsulating both ends of the battery cell to prevent short circuits between the positive and negative poles of the battery cell. At the same time, it is equivalent to sealing the surface of the battery cell to prevent moisture from entering the battery cell and avoid contamination of the electrolyte. By pressing the two ends of the battery cell, the consistency and tightness of the cylindrical battery assembly are improved.

[0083] It can be understood that in the present embodiment, the end face of the rubber coating and the end face of the rubber pressing are in a one-to-one correspondence. For example, the first pole welded with the current collecting plate is rubber coated, and then the first pole after rubber coating is fully rubber pressed. The first and second poles welded with the current collecting plate are rubber coated, and then the first and second poles after rubber coating are fully rubber pressed.

[0084] It is worth mentioning that the rubber coating does not cover the entire end face of the battery. The effective surface of the rubber coating is arranged in a ring shape as a whole, so that the extreme end of the battery can be exposed to the outside, which is convenient for connection with the external electrode.

[0085] For further information, please refer to Figure 5In order to avoid damage to the connecting piece 2001 of the current collecting disk during the glue pressing process, the present scheme proposes a battery cell glue pressing device 3, which includes a battery cell transfer mechanism 31, a pressing mechanism 32, a first glue pressing drive mechanism 33 and a glue pressing mechanism 34; the battery cell transfer mechanism 31 is used to carry the battery cell 2000 to move along the first direction; the pressing mechanism 32 is used to press the connecting piece 2001 on the current collecting disk of the battery cell 2000; the first glue pressing drive mechanism 33 is used to drive the pressed battery cell 2000 to move along the second direction; the glue pressing mechanism 34 is arranged on one side of the pressing mechanism 32 along the first direction; wherein, when the glue pressing mechanism 34 presses the end face of the battery cell 2000 supplied from the second direction, the glue pressing mechanism 34 forms a glue pressing surface abutting against the end face of the battery cell 2000. With such a design, by using the pressing mechanism 32 to press the connecting piece 2001 on the current collecting disk of the battery cell 2000 before gluing, it is possible to avoid the easily damaged area of ​​the connecting piece 2001 during gluing, and use the battery cell transfer mechanism 31 to transfer the pressed battery cell 2000 to the corresponding position of the gluing mechanism 34, and use the first gluing drive mechanism 33 to drive the pressed battery cell 2000 to move toward the gluing mechanism 34 until the end face of the battery cell 2000 abuts against the gluing surface of the gluing mechanism 34 for gluing, thereby pressing the adhesive paper on the side of the battery cell 2000 to the end face of the battery cell 2000, achieving a good gluing effect, avoiding damage to the connecting piece 2001, thereby improving product yield and reducing costs and increasing efficiency.

[0086] Specifically, the battery cell transfer mechanism 31 includes a slide 311 and a support seat 312. The slide 311 extends along a first direction. The support seat 312 is installed on the slide 311 and can move along the first direction. A supporting claw 3121 is provided on the support seat 312 to support the battery cell 2000. The battery cell 2000 can slide along the second direction on the supporting claw 3121 under the push of the first glue pressing driving mechanism 33.

[0087] Specifically, see Figure 6 The first glue pressing driving mechanism 33 includes a first machine base 331, a pusher head mounting plate 332, a first driving cylinder 333, a pusher head and a second driving cylinder 335; the first machine base 331 is arranged on the glue pressing surface side of the glue pressing mechanism, and the pusher head mounting plate 332 is movably mounted on the machine base along the second direction; the first driving cylinder 333 is used to drive the pusher head 334 mounting plate 332; and the pusher head is movably mounted on the pusher head mounting plate 332 along the second direction, and the second driving cylinder 335 is used to drive the pusher head 334. In this arrangement, the first driving cylinder 333 drives the pusher head 334 mounting plate 332, so that the pusher head initially pushes the battery cell 2000 and pushes the battery cell 2000 to a position close to the pressing head 341, and then controls the second driving cylinder 335 to drive the pusher head 334, so that the pusher head slowly pushes the battery cell 2000 against the glue pressing surface for glue pressing.

[0088] In one embodiment of the present invention, please refer to Figure 7 The glue pressing mechanism 34 includes a pressing head 341 and a rubber pushing sleeve 342; the pressing head 341 is provided with a glue pressing hole 3411; the rubber pushing sleeve 342 is movably installed in the glue pressing hole 3411 along the second direction; wherein, when the end face of the battery cell 2000 is glued, the end face of the battery cell 2000 abuts against the rubber pushing sleeve 342 until the pressing head 341 and the rubber pushing sleeve 342 jointly form a glue pressing surface abutting against the end face of the battery cell 2000, and the connecting piece 2001 avoids the pressing head 341 and the rubber pushing sleeve 342. In this way, when the battery cell 2000 reaches the corresponding position of the glue pressing mechanism 34, the first glue pressing driving mechanism 33 first pushes the battery cell 2000 until the end face of the battery cell 2000 abuts against the rubber pushing sleeve 342, and further pushes the battery cell 2000 to move. The battery cell 2000 pushes the rubber pushing sleeve 342 to move away from the first glue pressing driving mechanism 33 until the end face of the battery cell 2000 abuts against the rubber pushing sleeve 342 and the pressure head 341 at the same time. At this time, the pressure head 341 and the rubber pushing sleeve 342 jointly form a glue pressing surface abutting against the end face of the battery cell 2000, and the part of the adhesive paper protruding from the end face of the battery cell 2000 is completely pressed against the end face of the battery cell 2000 by the glue pressing surface to complete the glue pressing. In the glue pressing process, the connecting piece 2001 forms an avoidance with the pressure head 341 and the rubber pushing sleeve 342 to avoid damage to the connecting piece 2001.

[0089] Furthermore, the pressing head 341 is made of an elastic material, specifically one or more of silicone, thermoplastic polyurethane, polycarbonate or high molecular polymer. This arrangement can prevent the battery cell 2000 from being scratched and deformed during the gluing process, thereby improving the gluing effect.

[0090] In one embodiment of the present invention, the rubber push sleeve 342 includes a sleeve body 3421 and a plurality of rubber pressing ribs 3422 arranged at one end of the sleeve body 3421, and the plurality of rubber pressing ribs 3422 are arranged at intervals along the circumference of the sleeve body 3421; the pressure head 341 is provided with a plurality of rubber pressing holes 3411 arranged circumferentially; and the plurality of rubber pressing ribs 3422 move in correspondence with the plurality of rubber pressing holes 3411 one by one. In this way, when the battery cell 2000 reaches the corresponding position of the glue pressing mechanism 34, the first glue pressing driving mechanism 33 first pushes the battery cell 2000 until the end face of the battery cell 2000 abuts against the glue pressing rib 3422, and further pushes the battery cell 2000 to move. The battery cell 2000 pushes the glue pushing sleeve 342 to move away from the first glue pressing driving mechanism 33 until the end face of the battery cell 2000 abuts against the glue pressing rib 3422 and the pressure head 341 at the same time. At this time, the pressure head 341 and the glue pressing rib 3422 jointly form a glue pressing surface abutting against the end face of the battery cell 2000.

[0091] In one embodiment of the present invention, the end surface of the glue pressing rib 3422 away from the sleeve body 3421 includes a guide surface 3422A and a first glue pressing plane 3422B; the guide surface 3422A is used to guide the incoming battery cell 2000; the first glue pressing plane 3422B is used to abut against the end surface of the battery cell 2000. In this way, when the first glue pressing driving mechanism 33 pushes the battery cell 2000 until the end face of the battery cell 2000 abuts against the glue pushing sleeve 342, the first glue pressing driving mechanism 33 pushes the battery cell 2000 and the adhesive tape to move along the guide surface 3422A first so that the battery cell 2000 faces the first glue pressing plane 3422B, and at the same time, during the movement of the adhesive tape, the adhesive tape is gathered toward the center position along the guide surface 3422A, thereby pushing the battery cell 2000 to abut against the first glue pressing plane 3422B, and further pushing the battery cell 2000 and the adhesive pushing sleeve 342 to move until the battery cell 2000 abuts against the pressure head 341 and the first glue pressing plane 3422B, thereby completing the glue pressing.

[0092] Specifically, the guide surface 3422A is inclined, and the inclination direction is from the outer side of the rubber pushing sleeve 342 toward the inner side thereof in a direction close to the rubber pressing pushing structure, and the first rubber pressing plane 3422B extends radially.

[0093] Furthermore, at least a portion of the guide surface 3422A is arranged in an arc shape, and the arc curves toward the outer side of the rubber pushing sleeve 342 .

[0094] It should be noted that when different pressing mechanisms 32 press the connecting piece 2001 on the current collecting plate of the battery cell 2000, the connecting piece 2001 has different pressing positions, one of which is the position where the connecting piece 2001 extends along the axial direction of the battery cell 2000, and the other position where the connecting piece 2001 extends along the radial direction of the battery cell 2000. For the pressing positions corresponding to different pressing mechanisms 32, the glue pressing mechanism 34 is correspondingly set to different structures. If the pressing mechanism 32 presses the connecting piece 2001 to the position extending along the radial direction of the battery cell 2000, the side of the pressing head 341 close to the first glue pressing driving mechanism 33 is set to a straight end face, and a plurality of glue pressing holes 3411 are opened on the end face, so that avoidance can be formed.

[0095] In one embodiment of the present invention, the sheet pressing mechanism 32 presses the connecting sheet 2001 to a position extending along the axial direction of the battery cell 2000. Figure 5 and Figure 7The glue pressing mechanism 34 also includes a mounting seat 343, a centering pressure head 344 and an elastic member 345; the centering pressure head 344 is movably mounted on the mounting seat 343 along the second direction through a linear bearing 3442, and the centering pressure head 344 abuts against one end of the sleeve body 3421 away from the glue pressing rib 3422. The centering pressure head 344 forms an avoidance cavity 3441, and the connecting piece 2001 on the current collecting disk of the battery cell 2000 extends into the avoidance cavity 3441 through the pressure head 341 and the rubber pushing sleeve 342; the elastic member 345 (the figure shows the movable stroke of the elastic member 345) is arranged between the mounting seat 343 and the centering pressure head 344, and is used to drive the pushing member to abut against the rubber pushing sleeve 342. In this way, when the first glue pressing driving mechanism 33 pushes the battery cell 2000, the connecting piece 2001 on the current collecting disk of the battery cell 2000 extends into the avoidance cavity 3441 through the pressure head 341 and the rubber pushing sleeve 342, and the connecting piece 2001 forms an avoidance with the pressure head 341 and the rubber pushing sleeve 342. After the first glue pressing driving mechanism 33 pushes the battery cell 2000 until the end face of the battery cell 2000 abuts against the rubber pushing sleeve 342 and the pressure head 341 at the same time to complete the glue pressing, the first glue pressing driving mechanism 33 moves away from the glue pressing mechanism 34, and the battery cell 2000 and the glue pressing sleeve return to the position before abutting against the battery cell 2000 under the action of the elastic member 345.

[0096] Specifically, a mounting hole extending along the second direction is provided on the mounting seat 343, the outer ring portion of the linear bearing 3442 is arranged in the mounting hole, and the centering pressure head 344 is provided with a mounting rod, which is connected to the inner ring portion of the linear bearing 3442. In this way, the centering pressure head 344 is movably arranged on the mounting seat 343 through the linear bearing 3442, so that the centering pressure head 344 can be stably moved along the second direction, and then aligned with the rubber push sleeve 342 for stable rubber pressing.

[0097] The elastic member 345 is a compression spring. An opening is provided on a side of the avoidance cavity 3441 facing the rubber push sleeve 342 to allow the connecting piece 2001 to extend into the avoidance cavity 3441 .

[0098] Specifically, a through hole 3412 is provided on the pressure head 341 for the connection piece 2001 on the current collecting disk of the power core 2000 to pass through.

[0099] Furthermore, a plurality of glue pressing holes 3411 are arranged along the circumference of the via hole 3412 .

[0100] Furthermore, an annular protrusion 34121 is convexly formed on the inner wall of the through hole 3412, and a plurality of glue pressing holes 3411 are formed on the annular protrusion 34121. In this way, the annular protrusion 34121 forms a second glue pressing plane 34121A, and during glue pressing, the first glue pressing driving mechanism 33 pushes the battery cell 2000 until the end surface of the battery cell 2000 abuts against the first glue pressing plane 3422B and the second glue pressing plane 34121A at the same time.

[0101] Furthermore, a limiting groove 34122 is concavely formed on the inner side wall of the through hole 3412 , and correspondingly, a limiting rib 34211 is convexly formed on the outer peripheral side of the sleeve body 3421 to limit the range of movement of the rubber push sleeve 342 .

[0102] In one embodiment of the present invention, please refer to Figure 8 and Fig. 9 The pressing mechanism 32 includes a pressing seat 321 and a pressing assembly. The pressing assembly is installed on the pressing seat 321 and is used to bend the connecting piece 2001 on the current collecting disk of the battery cell 2000 downward.

[0103] In one embodiment of the present invention, the tablet pressing assembly includes a plurality of tablet pressing rollers 322; the plurality of tablet pressing rollers 322 are rotatably mounted on the tablet pressing seat 321 around an axis extending in the second direction; the plurality of tablet pressing rollers 322 are arranged along the first direction, and at least part of them are inclined, and the inclined direction is downwardly inclined toward the direction close to the glue pressing mechanism 34. With such an arrangement, when the battery cell transfer mechanism 31 carries the battery cell 2000 to the corresponding position of the tablet pressing structure, the connecting sheet 2001 is located below the pressing roller, and along with the moving direction of the battery cell 2000, the tablet pressing roller 322 is inclined downward, so that the connecting sheet 2001 is gradually pressed down to achieve tablet pressing.

[0104] Specifically, the pressing seat 321 is disposed on one side of the movable stroke of the battery cell transfer mechanism 31 along the first direction, and performs glue pressing when the battery cell transfer mechanism 31 carries the battery cell 2000 and moves.

[0105] Specifically, a plurality of sheet pressing rollers 322 close to the sheet pressing mechanism 32 are arranged horizontally to ensure that the connecting sheet 2001 does not twist after sheet pressing, which facilitates the subsequent operation of glue pressing.

[0106] In one embodiment of the present invention, the cell glue pressing device 3 further includes a sheet lifting mechanism 35, which is arranged on the other side of the sheet pressing mechanism 32 and is used to lift the connecting sheet 2001 of the collector plate of the cell 2000 after glue pressing. In this way, the sheet is lifted after the glue pressing operation to restore the connecting sheet 2001 to its initial position.

[0107] In one embodiment of the present invention, the sheet lifting mechanism 35 includes a sheet lifting seat 351 and a sheet lifting assembly installed on the sheet lifting seat 351, and the sheet lifting assembly is used to bend the connecting sheet 2001 on the current collecting disk of the battery cell 2000 upward; the sheet lifting assembly includes a plurality of sheet lifting rollers 352; the plurality of sheet lifting rollers 352 are rotatably installed on the sheet lifting seat 351 around an axis extending along the second direction; the plurality of sheet lifting rollers 352 are arranged along the first direction, and at least part of them are inclined, and the inclined direction is downwardly inclined in the direction close to the glue pressing mechanism 34. In this way, when the battery cell transfer mechanism 31 carries the battery cell 2000 to the corresponding position of the sheet lifting mechanism 35, the connecting sheet 2001 is located above the pressing roller, and along with the moving direction of the battery cell 2000, the pressing roller 322 is inclined upward, so that the connecting sheet 2001 is gradually lifted for recovery.

[0108] Furthermore, the highest position of the lifting sheet assembly and the lowest position of the adhesive pressing assembly are at the same height. This arrangement enables the adhesive pressing assembly to lift the connecting sheet 2001 so that the connecting sheet 2001 can be completely restored.

[0109] In one embodiment of the present invention, the glue pressing mechanism 34 is movably arranged along the second direction; the battery cell glue pressing device 3 further includes a second glue pressing driving mechanism 36 to drive the glue pressing mechanism 34 to move. With such arrangement, when the first glue pressing driving mechanism 33 drives the pressed battery cell 2000 to move toward the glue pressing mechanism 34, the second glue pressing driving mechanism 36 can synchronously drive the glue pressing mechanism 34 to move toward the first glue pressing driving mechanism 33; after the glue pressing mechanism 34 completes the glue pressing, the battery cell 2000 can be pushed back to the corresponding position with the glue pressing mechanism 34, so that the battery cell transfer mechanism 31 can transport the battery cell 2000 and perform the next operation.

[0110] Specifically, the second glue pressing driving mechanism 36 includes a second machine base 361 and a third driving cylinder 362. The glue pressing mechanism 34 is movably arranged on the second machine base 361. The third driving cylinder 362 is used to drive the glue pressing mechanism 34. The mounting base 343, the sheet pressing base 321 and the sheet lifting base of the glue pressing mechanism 34 are arranged on the second machine base 361.

[0111] In one embodiment of the present invention, the working process of the battery core glue pressing device 3 is as follows:

[0112] In the first step, the battery cell transfer mechanism 31 is located at the initial position, the battery cell 2000 to be glued is placed on the battery cell transfer mechanism 31, and the battery cell transfer mechanism 31 is controlled to move the battery cell 2000 to the corresponding position of the sheet pressing mechanism 32; then the battery cell transfer mechanism 31 is controlled to drive the battery cell 2000 to slowly move toward the glue pressing mechanism 34, and the connecting sheet 2001 passes through a plurality of gradually decreasing sheet pressing rollers 322 of the sheet pressing mechanism 32, and is gradually bent downward, until the battery cell 2000 passes through the sheet pressing mechanism 32, and the connecting sheet 2001 is bent to the sheet pressing position;

[0113] The second step is to control the battery cell transfer mechanism 31 to move the battery cell 2000 to the corresponding position of the glue pressing mechanism 34, and then control the first glue pressing driving mechanism 33 to push the battery cell 2000 to move toward the glue pressing mechanism 34. Under the push of the first glue pressing driving mechanism 33, the battery cell 2000 and the adhesive paper move along the guide surface 3422A of the glue pressing rib 3422 until the end of the battery cell 2000 abuts against the first glue pressing plane 3422B, and the adhesive paper is pressed tightly on the end surface of the battery cell 2000. The battery cell 2000 moves further to abut against the second glue pressing plane 34121A. In this process, the connecting piece 2001 extends into the avoidance cavity 3441 through the pressure head 341 and the rubber pushing sleeve 342;

[0114] The third step is to control the second glue pressing driving mechanism 36 to drive the glue pressing mechanism 34 to make the battery cell 2000 return to the corresponding position of the glue pressing mechanism 34 .

[0115] The fourth step is to control the battery cell transfer mechanism 31 to move the battery cell 2000 to the corresponding position of the lifting mechanism 35; and then control the battery cell transfer mechanism 31 to drive the battery cell 2000 to move slowly in the direction away from the glue pressing mechanism 34, and the connecting sheet 2001 passes through the pressing mechanism 32 with multiple pressing rollers 322 whose heights gradually rise, and is gradually bent upward, until the battery cell 2000 passes through the pressing mechanism 32, and the connecting sheet 2001 is restored.

[0116] Please refer to Fig.10 Based on the above-mentioned battery core glue pressing device 3, this solution also proposes a battery core glue pressing method, comprising the following steps:

[0117] S9, controlling the battery cell transfer mechanism 31 to transfer the battery cell 2000 to the sheet pressing mechanism 32, so as to press the connecting sheet 2001 on the current collecting plate of the battery cell 2000, so as to adjust the connecting sheet 2001 to the middle of the battery cell 2000;

[0118] S10, controlling the battery cell transfer mechanism 31 to move the battery cell 2000 to the glue pressing mechanism 34, and controlling the first glue pressing driving mechanism 33 to drag the battery cell 2000 to move toward the glue pressing mechanism 34, so as to perform glue pressing on the end surface of the battery cell 2000;

[0119] S11 , controlling the battery cell transfer mechanism 31 to transfer the battery cell 2000 to the sheet lifting mechanism 35 , so as to lift the connecting sheet 2001 on the current collecting plate of the battery cell 2000 , so as to move the connecting sheet 2001 back to the initial position.

[0120] Such a design controls the pressing mechanism 32 to press the connecting piece 2001 on the current collecting disk of the battery cell 2000 before controlling the gluing, and then controls the battery cell transferring mechanism 31 to transfer the pressed battery cell 2000 to the corresponding position of the gluing mechanism 34 for gluing, and finally controls the battery cell transferring mechanism 31 to lift and restore the connecting piece 2001 on the current collecting disk of the battery cell 2000, thereby achieving a good gluing effect, avoiding damage to the connecting piece 2001 and not affecting subsequent processes, thereby improving product yield and reducing costs and increasing efficiency.

[0121] Please refer to Figures 2 to 4 The present invention also proposes an assembly device 1000 for cylindrical batteries, comprising a shell conveyor line 1, a cleaning mechanism 2, a battery cell conveyor line, a shell insertion mechanism and a welding mechanism, wherein the shell conveyor line 1 is used to transport the shell; the cleaning mechanism 2 comprises a first cleaning device 21, a second cleaning device 22, a third cleaning device 23 and a fourth cleaning device 24 arranged at intervals along the extension direction of the shell conveyor line 1, the first cleaning device 21 is used to clean the inner bottom wall of the shell, the second cleaning device 22 is used to clean the opening of the shell, the third cleaning device 23 is used to clean the inner peripheral wall of the shell, and the fourth cleaning device 24 is used to clean the outer bottom wall of the shell; the battery cell conveyor line is used to transport the battery cell; the shell insertion mechanism is arranged between the battery cell conveyor line and the shell conveyor line 1, and is used to feed the battery cell into the shell to form the initially formed battery; the welding mechanism is used to perform penetration welding and sealing welding on the initially formed battery.

[0122] The technical solution provided by the present invention cleans the shell by setting the cleaning mechanism 2 to prepare for subsequent welding and improve the welding quality. Specifically, by setting the first cleaning device 21, the second cleaning device 22, the third cleaning device 23 and the fourth cleaning device 24, the inner bottom wall, the opening, the inner peripheral wall and the outer bottom wall of the shell are cleaned in turn, thereby achieving targeted treatment of each part of the shell, thereby providing a good welding environment for the subsequent corresponding point bottom penetration welding, cover pre-spot welding and sealing welding, and ensuring the welding quality. By arranging the shell conveyor line 1 and the battery cell conveyor line together, and setting the cleaning mechanism 2, the shell insertion mechanism and the welding mechanism on both sides, the automation and industrialization of cylindrical battery assembly are realized, and the production efficiency is improved.

[0123] Furthermore, in order to facilitate the spatial arrangement of the production line, the first cleaning device 21, the second cleaning device 22, the third cleaning device 23 and the fourth cleaning device 24 are arranged on the same side of the shell conveyor line 1. It is worth mentioning that the first clamp, the second clamp, the third clamp and the fourth clamp are also arranged on the opposite side of each cleaning device to position the shell when cleaning the shell. It can be understood that a driving device is arranged corresponding to the first clamp, the second clamp and the fourth clamp to drive the shell to rotate relative to the corresponding laser. The cylindrical battery assembly device 1000 also includes a flipping mechanism, which is arranged between the third cleaning device 23 and the fourth cleaning device 24 to flip the shell so that the positions of the open end and the closed end of the shell are swapped. With such a design, the cylindrical battery assembly device 1000 is more reasonable in spatial arrangement and can be applied to a variety of different production line layout methods. For example, in a specific embodiment, the shell conveyor line 1 and the battery cell conveyor line are arranged in a U-shape. By arranging all the clamp structures that occupy a smaller space on the inner side of the U-shape and arranging all the cleaning devices that occupy a larger space on the outer side of the U-shape, the turning radius of the production line can be reduced, thereby reducing the length of the production line in disguise and improving the conveying efficiency.

[0124] It is understandable that the flipping mechanism may be a multi-axis mechanical claw or a rotating mechanism on a shell carrier, and the present invention does not impose any specific limitation thereto.

[0125] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for assembling a cylindrical battery, for assembling a cylindrical battery, wherein the cylindrical battery comprises a shell, a battery cell and a cap, wherein one end of the shell is open, and wherein: The cylindrical battery assembly method comprises the following steps: S1, cleaning the inner bottom wall of the shell; S2, cleaning the opening of the shell; S3, cleaning the inner peripheral wall of the shell; S4, cleaning the outer bottom wall of the shell; S5, pushing the pre-treated battery cell into the shell to form a primary formed battery; S6, performing spot bottom penetration welding on the initially formed battery to connect one end of the pre-treated battery cell to the inner bottom wall of the shell; S7, pre-spot welding the cover cap to the open end of the shell; S8. Sealing and welding the cap and the open end of the shell to complete the battery assembly.

2. The method for assembling a cylindrical battery according to claim 1, characterized in that: The step S1, cleaning the inner bottom wall of the shell, comprises: The inner bottom wall of the shell is laser processed by a laser so as to clean and roughen the inner bottom wall of the shell.

3. The method for assembling a cylindrical battery according to claim 2, characterized in that: A liquid injection hole is provided on the inner bottom wall of the shell; The step S1, cleaning the inner bottom wall of the shell, further comprises: While the inner bottom wall of the shell is laser processed by a laser, negative pressure adsorption is performed on the injection hole of the inner bottom wall of the shell to clean the welding slag.

4. The method for assembling a cylindrical battery according to claim 1, characterized in that: The step S2, cleaning the opening of the shell, comprises: The opening end of the shell is laser processed by a laser to clean and roughen the opening of the shell.

5. The method for assembling a cylindrical battery according to claim 1, characterized in that: The step S3, cleaning the inner peripheral wall of the shell, comprises: The negative pressure device is extended into the inner cavity of the shell to perform negative pressure dust removal on the inner cavity of the shell.

6. The method for assembling a cylindrical battery according to claim 1, characterized in that: The step S4, cleaning the outer bottom wall of the shell, comprises: The outer bottom wall of the shell is laser processed by a laser so as to clean and roughen the outer bottom wall of the shell.

7. The method for assembling a cylindrical battery according to claim 1, characterized in that: The two ends of the battery core correspond to a first pole and a second pole respectively, and the first pole and the second pole are respectively welded with current collecting plates, wherein the current collecting plate of the first pole is connected to the cap; Before the S5, pushing the pre-treated battery cell into the housing to form a primary formed battery, the method includes: Align the second pole of the pretreated battery cell with the opening of the shell.

8. The method for assembling a cylindrical battery according to claim 7, characterized in that: Before aligning the second pole of the pre-treated battery cell with the opening of the shell, the method includes: The first pole and / or the second pole welded with the current collecting plate are encapsulated with rubber, and the encapsulated first pole and / or the second pole are subjected to full-pressing treatment.

9. An assembly device for cylindrical batteries, characterized in that: include: Shell conveyor line, used to transport shells; A cleaning mechanism, comprising a first cleaning device, a second cleaning device, a third cleaning device and a fourth cleaning device arranged at intervals along the extension direction of the shell conveying line, wherein the first cleaning device is used to clean the inner bottom wall of the shell, the second cleaning device is used to clean the opening of the shell, the third cleaning device is used to clean the inner peripheral wall of the shell, and the fourth cleaning device is used to clean the outer bottom wall of the shell; Battery cell conveyor line, used to transport battery cells; A shell feeding mechanism, provided between the battery cell conveying line and the shell conveying line, for feeding the battery cell into the shell to form the primary formed battery; The welding mechanism is used to perform penetration welding and sealing welding on the initially formed battery.

10. The cylindrical battery assembly device according to claim 9, characterized in that: The first cleaning device, the second cleaning device, the third cleaning device and the fourth cleaning device are arranged on the same side of the shell conveying line; The cylindrical battery assembly device further comprises a flipping mechanism, which is disposed between the third cleaning device and the fourth cleaning device and is used to flip the shell so that the positions of the open end and the closed end of the shell are reversed.

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