Flanging device and cylindrical battery production line

Abstract

The present application relates to the technical field of cylindrical battery production, and particularly relates to a folding device and a cylindrical battery production line, which is used for folding the rubber coating arranged on the cylindrical battery, and comprises a supporting assembly, a rotating assembly and a folding assembly, wherein the supporting assembly is used for clamping the first end wall and the second end wall of the cylindrical battery, the rotating assembly is abutted to the outer circumferential wall of the cylindrical battery and is used for driving the cylindrical battery to rotate, and the folding assembly comprises a folding block, the folding block is arranged corresponding to the rubber coating protruding end of the cylindrical battery, the folding block is configured to be capable of moving towards the direction close to or away from the rubber coating protruding end, and is used for folding the rubber coating of the rubber coating protruding end when the cylindrical battery rotates, so that the rubber coating is arranged on the first end wall. The cylindrical battery production line comprises the folding device. The folding device and the cylindrical battery production line can make the rubber coating flat.

Description

Technical Field

[0001] This invention relates to the field of cylindrical battery manufacturing technology, and in particular to a folding device and a cylindrical battery production line. Background Technology

[0002] Cylindrical batteries are characterized by high capacity, long cycle life, and a wide operating temperature range. Depending on their specifications, they are widely used in various fields such as solar lighting, lawn lighting, backup power, power tools, toy models, and photovoltaic energy. During the production of cylindrical batteries, they undergo an encapsulation process to cover the electrolyte and positive and negative electrode materials. After encapsulation, processes such as degassing, sealing, and edge trimming are required. At this stage, excess adhesive tape may remain on the sides and tabs of the battery. This excess tape needs to be folded or shaped to adhere tightly to the perimeter of the battery, ensuring a flat and sealed package.

[0003] Currently, when folding the edges of cylindrical batteries, the cylindrical battery is fixedly placed in the receiving groove for the folding operation. This makes it impossible to achieve the function of folding the edges while rotating the cylindrical battery. As a result, the folding effect of the cylindrical battery coating is not good and wrinkles and unevenness are easy to occur. Summary of the Invention

[0004] The main objective of this invention is to provide a folding device and a cylindrical battery production line, aiming to solve the technical problem of poor folding effect and uneven wrinkles in the current cylindrical battery coating process.

[0005] To achieve the above objectives, the present invention proposes a folding device for folding the overlay of a cylindrical battery. The cylindrical battery includes a first end wall, a second end wall, and an outer peripheral wall. The first end wall and the second end wall are disposed opposite to each other. The outer peripheral wall extends from the first end wall to the second end wall. The outer peripheral wall is covered with adhesive tape, and the adhesive tape extends beyond the first end wall to form an overlay protruding end. The folding device includes:

[0006] A support assembly for clamping the first end wall and the second end wall;

[0007] A rotating component, which abuts against the outer peripheral wall, is used to drive the cylindrical battery to rotate;

[0008] A folding assembly includes a folding block, which is disposed corresponding to the overmolded protruding end and is configured to move toward or away from the overmolded protruding end. The folding block is used to fold the tape at the overmolded protruding end when the cylindrical battery rotates, so that the tape is attached to the first end wall.

[0009] In some embodiments, the folded edge block is provided with an arcuate groove at one end near the rubber-coated protruding end. The arcuate groove is bent in a direction away from the rubber-coated protruding end so that when the folded edge block moves in a direction close to the rubber-coated protruding end, the arcuate groove can fit against the first end wall.

[0010] In some embodiments, the arcuate groove includes a first end and a second end, the first end and the second end are disposed opposite to each other, the first end is the end of the arcuate groove close to the overmolded protruding end, the second end is the end of the arcuate groove away from the overmolded protruding end, and the arcuate groove extends obliquely from the first end to the second end along a first direction;

[0011] Wherein, the first direction is the direction in which the folded edge block moves toward the end of the overmolded rubber, and the inclination α of the arc groove satisfies: 15°≤α≤25°.

[0012] In some embodiments, the folding assembly further includes a pre-compression block disposed corresponding to the overprinted protruding end, and the pre-compression block is configured to move toward or away from the overprinted protruding end to pre-compress the tape at the overprinted protruding end.

[0013] In some embodiments, the folding assembly further includes a pressing block disposed corresponding to the overmolded protruding end, and the pressing block is configured to move toward or away from the overmolded protruding end to press the tape against the first end wall after the tape at the overmolded protruding end has been folded.

[0014] In some embodiments, the folding block, the pre-pressing block, and the clamping block are disposed on the same mounting plate, and the mounting plate is driven by a first cylinder, which drives the mounting plate to move toward or away from the overmolded protruding end;

[0015] The pre-pressing block and the clamping block are located on opposite sides of the folding block and move along the mounting plate toward the end of the overmolded tape. The pre-pressing block is located downstream of the folding block so that the pre-pressing block first pre-presses the tape at the end of the overmolded tape, the folding block then folds the tape at the end of the overmolded tape, and the clamping block finally presses the tape tightly against the first end wall.

[0016] In some embodiments, a slide rail is provided on the folding assembly, and a slider is provided on the mounting plate. The slider is connected to the slide rail so that the mounting plate is slidably connected to the folding assembly.

[0017] The first cylinder is disposed on the folding assembly to drive the mounting plate to move along the slide rail toward or away from the overmolded protruding end.

[0018] In some embodiments, the pressing block is driven by a second cylinder, which drives the pressing block to move toward or away from the rubber-coated protruding end.

[0019] In some embodiments, an alignment fiber is provided in the support component for aligning the cylindrical battery.

[0020] Correspondingly, the present invention also proposes a cylindrical battery production line, including the folding device described in any of the above embodiments.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] In the technical solution of this invention, after the cylindrical battery is coated with adhesive, in order to ensure that the excess adhesive tape at the end wall of the cylindrical battery is evenly and flatly adhered to the end wall, and to ensure that the adhesive tape has a good insulating effect, and to prevent the foils of the positive and negative electrodes and the current collector from directly contacting the outer shell and causing a short circuit inside the cylindrical battery, a folding device for folding the coated edge of a cylindrical battery is provided. The folding device includes a support component, a rotating component, and a folding component. The support component is clamped on the two end walls of the cylindrical battery to achieve the suspended positioning of the cylindrical battery. The rotating component abuts against the outer peripheral wall of the cylindrical battery to drive the cylindrical battery to rotate. The folding component includes a folding block. When performing the coating folding, the folding block moves towards the direction of the extended end of the coating. During the rotation of the cylindrical battery, the adhesive tape is pressed against the end wall towards the direction of the end wall of the cylindrical battery, so that the coating folding is performed simultaneously with the rotation of the cylindrical battery.

[0023] The folding device provided by this invention can fold the adhesive tape at the end of the cylindrical battery during its rotation using folding blocks. This ensures that the tape adheres smoothly to the end wall of the cylindrical battery after folding, effectively preventing unevenness and wrinkles in the tape during the folding process. Folding the tape and ensuring its smooth adhesion to the end wall of the cylindrical battery improves its safety performance, preventing short circuits and other malfunctions during operation, thus eliminating safety hazards and avoiding threats to users or the surrounding environment.

[0024] The cylindrical battery production line using the above-mentioned folding device is beneficial to improving the safety performance and yield of cylindrical batteries, and ensuring that the produced cylindrical batteries have good quality and excellent performance. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of a folding device provided in an embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the support component in a folding device according to an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the rotating component in a folding device according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the folding component in a folding device according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the overall structure of the folding block in a folding device provided in an embodiment of the present invention;

[0031] Figure 6 This is a longitudinal sectional view of the overall structure of the folding block in a folding device provided in an embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the overall structure of a cylindrical battery after coating, according to an embodiment of the present invention.

[0033] Explanation of icon numbers:

[0034] 100 - Support components;

[0035] 200-Rotating assembly;

[0036] 210 - Rotating roller; 220 - Motor;

[0037] 300-Folded Edge Component;

[0038] 310 - Pre-compression block; 320 - Folded edge block; 330 - Compactor block; 340 - Mounting plate; 350 - Slide rail; 360 - First cylinder; 370 - Second cylinder;

[0039] 321 - Circular groove; 322 - First end; 323 - Second end;

[0040] 400-cylindrical battery;

[0041] 410 - First end wall; 420 - Second end wall; 430 - Outer peripheral wall;

[0042] 500 - Overmolded;

[0043] X - First direction.

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] 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 positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0047] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0048] Cylindrical batteries are characterized by high capacity, long cycle life, and a wide operating temperature range. Depending on their specifications, they are widely used in various fields such as solar lighting, lawn lighting, backup power, power tools, toy models, and photovoltaic energy. During the production of cylindrical batteries, they undergo an encapsulation process to cover the electrolyte and positive and negative electrode materials. After encapsulation, processes such as degassing, sealing, and edge trimming are required. At this stage, excess adhesive tape may remain on the sides and tabs of the battery. This excess tape needs to be folded or shaped to adhere tightly to the perimeter of the battery, ensuring a flat and sealed package.

[0049] Currently, when folding the edges of cylindrical batteries for overmolding, the cylindrical battery is fixedly placed in the receiving groove for the folding operation. It is impossible to achieve the function of folding the edges while rotating the cylindrical battery. When using the current device mechanism to fold the edges of cylindrical batteries for overmolding, the edge can only be folded directly facing the end of the cylindrical battery. This will result in poor edge folding effect and easy to cause wrinkles and unevenness.

[0050] To address the current technical issue of poor edge folding and wrinkling in cylindrical batteries (400mm), referring to... Figures 1 to 7 This invention provides a folding device for folding the adhesive tape 500 disposed on a cylindrical battery 400. A conventional cylindrical battery 400 includes a first end wall 410, a second end wall 420, and an outer peripheral wall 430. The first end wall 410 and the second end wall 420 are disposed opposite each other. The outer peripheral wall 430 extends from the first end wall 410 to the second end wall 420, and is covered with adhesive tape, which extends beyond the first end wall 410 to form an extended adhesive tape end. It should be noted that the first end wall 410 and the second end wall 420 can be interchangeable; for example, the adhesive tape can also extend beyond the second end wall 420 to form an extended adhesive tape end. In the actual production process of the cylindrical battery 400, the folding device provided in this embodiment is needed to fold the adhesive tape at the extended adhesive tape end so that the tape can be smoothly adhered to the end wall of the cylindrical battery 400 later. This folding device includes a support component 100, a rotating component 200, and a folding component 300. The support component 100 can clamp the cylindrical battery 400, enabling the cylindrical battery 400 to be suspended and positioned. The rotating component 200 can rotate the cylindrical battery 400. The folding component 300 can fold the rubber coating 500 on the cylindrical battery 400. This folding device can rotate the cylindrical battery 400 while folding the rubber coating 500.

[0051] Among them, reference Figure 2 The support component 100 is used to clamp the first end wall 410 and the second end wall 420 of the cylindrical battery 400. Specifically, it can be positioned at the axial center of the first end wall 410 and the second end wall 420 to facilitate the rotation of the cylindrical battery 400 by the subsequent rotating component 200, and to ensure that the cylindrical battery 400 does not shift during rotation, thereby ensuring the folding effect of the overmolded end. The support component 100 can be connected to a cylinder, which drives the support component 100 to move up and down, so as to facilitate the loading and positioning of the cylindrical battery 400, positioning the cylindrical battery 400 close to the rotating component 200 and the folding component 300.

[0052] It should be noted that since the tape at the extended end of the overmolded battery is only attached to the edge of the cylindrical battery 400 after folding, for example, the tape after folding is only attached to the edge of the cylindrical battery 400 at 2mm-3mm (including the end value), the use of the support component 100 to clamp the end wall of the cylindrical battery 400 does not affect the subsequent tape folding.

[0053] Reference Figure 3 The rotating component 200 abuts against the outer peripheral wall 430 of the cylindrical battery 400 to drive the cylindrical battery 400 to rotate. Specifically, the rotating component 200 may include a rotating roller 210 and a motor 220. The rotating roller 210 abuts against the outer peripheral wall 430 of the cylindrical battery 400, and the rotating roller 210 is driven by the motor 220. The motor 220 controls the rotation of the rotating roller 210, and the rotating roller 210 drives the cylindrical battery 400 to rotate. More preferably, a rubber anti-slip pad can be provided along the circumference of the rotating roller 210. With this structure, on the one hand, the contact friction between the rotating roller 210 and the cylindrical battery 400 can be increased to prevent slippage between the rotating roller 210 and the cylindrical battery 400. On the other hand, because the rubber is soft, this can effectively avoid damage to the cylindrical battery 400.

[0054] Reference Figure 4 The folding assembly 300 includes a folding block 320, which is disposed corresponding to the overmolded protruding end and is configured to move toward or away from the overmolded protruding end. It is used to fold the tape at the overmolded protruding end when the cylindrical battery 400 rotates, so that the tape is attached to the first end wall 410.

[0055] In this embodiment, after the cylindrical battery 400 is coated with adhesive, in order to ensure that the excess adhesive tape at the end wall of the cylindrical battery 400 is evenly and smoothly adhered to the end wall, and to ensure that the adhesive tape has a good insulating effect, thus preventing the positive and negative electrode foils and current collector from directly contacting the outer casing and causing a short circuit inside the cylindrical battery 400, a folding device is provided for folding the adhesive tape 500 provided on the cylindrical battery 400. The folding device includes a support component 100, a rotating component 200, and a folding component 300, wherein the support component 100 clamps the cylindrical battery 400. On the two end walls of 00, the cylindrical battery 400 is suspended and positioned. The rotating component 200 abuts against the outer peripheral wall 430 of the cylindrical battery 400 to drive the cylindrical battery 400 to rotate. The folding component 300 includes a folding block 320. When performing the overmolding 500 folding, the folding block 320 moves towards the overmolding extension end. During the rotation of the cylindrical battery 400, the tape is pressed against the end wall towards the end wall, so that the overmolding 500 folding is performed while the cylindrical battery 400 is rotating.

[0056] The folding device provided in this embodiment can fold the adhesive tape 500 using the folding block 320 during the rotation of the cylindrical battery 400. This ensures that the tape adheres smoothly to the end wall of the cylindrical battery 400 after folding, effectively preventing unevenness and wrinkles in the tape during the folding process. Folding the tape smoothly to the end wall of the cylindrical battery 400 improves its safety performance, preventing short circuits and other malfunctions during operation, thus eliminating safety hazards and avoiding threats to users or the surrounding environment.

[0057] In some embodiments, refer to Figure 5 The folding block 320 has an arc groove 321 at one end near the rubber-coated protruding end. The arc groove 321 is bent away from the rubber-coated protruding end so that when the folding block 320 moves towards the rubber-coated protruding end, the arc groove 321 can fit against the first end wall 410.

[0058] Specifically, given that the overall outer contour of the cylindrical battery 400 end wall is circular, that is, the overall outer contour of the overmolded protruding end is circular, when the folding block 320 folds the tape at the overmolded protruding end inward, in order to improve the fit between the folding block 320 and the overmolded protruding end, so that the tape can be evenly and smoothly adhered to the end wall of the cylindrical battery 400 after folding inward, a circular arc groove 321 is provided at the end of the folding block 320 near the tape to be folded. The curvature direction of the circular arc groove 321 is consistent with the arc direction of the overmolded protruding end. The circular arc groove 321 contacts the tape and pushes the tape inward. With the above structure, it is more conducive to folding the tape into a circular arc shape, so that the folded tape and the end wall of the cylindrical battery 400 fit more closely, thereby ensuring the flatness of the tape after folding, reducing the number of wrinkles, and thus ensuring that the overmolded 500 plays a good insulating role.

[0059] In some embodiments, refer to Figure 6 The arc-shaped groove 321 includes a first end 322 and a second end 323, which are disposed opposite to each other. The first end 322 is the end of the arc-shaped groove 321 near the rubber-coated protruding end, and the second end 323 is the end of the arc-shaped groove 321 away from the rubber-coated protruding end. The arc-shaped groove 321 extends obliquely from the first end 322 to the second end 323 along a first direction X. The first direction X is the direction in which the folded edge block 320 moves towards the rubber-coated protruding end. The inclination angle α of the arc-shaped groove 321 satisfies: 15°≤α≤25°. For example, the value of α can be 15°, 18°, 20°, 23°, 25°, etc.

[0060] Specifically, to improve the folding effect of the tape at the protruding end of the overmolded battery, the arc-shaped groove 321 is designed as a groove that smoothly slopes from the first end 322 to the second end 323. When folding using the arc-shaped groove 321, the first end 322 abuts against the edge of the protruding end of the overmolded battery, and the second end 323 contacts and pushes the tape at the protruding end of the overmolded battery to fold inward. In other words, the first end 322 is used to fix the tape wrapped around the outer peripheral wall 430 of the cylindrical battery 400, and the second end 323 is used to fold the protruding tape inward, so that the tape is flatly attached to the end wall of the cylindrical battery 400. This structural design of the arc-shaped groove 321 can avoid the tape from tearing due to stress concentration during the folding process, thereby improving the yield of the cylindrical battery 400.

[0061] In some embodiments, refer to Figure 4 The folding assembly 300 also includes a pre-compression block 310, which is disposed corresponding to the overprinted protruding end and is configured to move toward or away from the overprinted protruding end to pre-compress the tape at the overprinted protruding end.

[0062] Specifically, since the side of the tape closest to the cylindrical battery 400 is adhesive, there is a possibility that the tape might stick to the folding block 320 when it contacts and pushes the tape to fold. During the movement of the folding block 320, the adhesive tape might be torn off, rendering the cylindrical battery 400 unusable. To avoid this, when folding the tape, the pre-pressing block 310 first slightly presses down the tape, causing it to gradually shrink, reducing the probability of adhesion between the tape and the folding block 320. Then, the folding block 320 contacts the non-adhesive side of the tape and pushes it inward to fold, ensuring the tape adheres to the end wall of the cylindrical battery 400.

[0063] By adding a pre-pressing process before the folding process, the probability of the tape sticking to the folding block 320 can be effectively reduced, thereby effectively preventing the folding block 320 from tearing the tape, or the tape from being unevenly applied, or the tape from curling up.

[0064] In some embodiments, refer to Figure 4 The pre-compression block 310 can be set as a roller-shaped structure. Since the cylindrical battery 400 is constantly rotating during the folding process of the overlay 500, setting the pre-compression block 310 as a roller-shaped structure can allow it to rotate together with the cylindrical battery 400, thereby reducing the friction between the pre-compression block 310 and the tape and ensuring the pre-compression effect of the tape.

[0065] In some embodiments, refer to Figure 4The folding assembly 300 also includes a pressing block 330, which is disposed corresponding to the overmolded extension end and is configured to move toward or away from the overmolded extension end to press the tape against the first end wall 410 after the tape at the overmolded extension end has been folded.

[0066] Specifically, in order to ensure that the tape 500 can fit tightly against the end wall of the cylindrical battery 400 after folding, and to prevent the tape from lifting due to poor adhesion between the tape and the cylindrical battery 400, thus affecting the performance of the cylindrical battery 400, after folding the tape, the pressing block 330 is used to press the tape firmly onto the cylindrical battery 400 to improve the adhesion between the tape and the cylindrical battery 400. At the same time, the pressing block 330 can also flatten the wrinkles generated by the tape during folding, improving the folding effect of the tape 500.

[0067] By adding a pressing process after the folding process, the folded tape can be effectively pressed firmly onto the cylindrical battery 400, ensuring a tight fit between the tape and the battery 400. This effectively prevents the tape from lifting, bubbling, or unevenly adhering. The pressed tape effectively isolates the positive and negative electrode foils and current collector from the outer casing, improving the insulation effect of the coating 500 and ensuring that the cylindrical battery 400 will not short-circuit during operation, thus guaranteeing the safety and stability of the cylindrical battery 400 during operation.

[0068] In some embodiments, refer to Figure 4 The clamping block 330 can be set as a roller-shaped structure. Since the cylindrical battery 400 is constantly rotating during the folding process of the overlay 500, setting the clamping block 330 as a roller-shaped structure can allow it to rotate together with the cylindrical battery 400, thereby reducing the friction between the clamping block 330 and the tape and ensuring the tape's clamping effect.

[0069] In some embodiments, refer to Figure 4 To improve the integration level of the folding device and ensure that the folding block 320, pre-pressing block 310, and clamping block 330 do not interfere with each other during movement, the folding block 320, pre-pressing block 310, and clamping block 330 are disposed on the same mounting plate 340. The mounting plate 340 is driven by the first cylinder 360, which drives the mounting plate 340 to move towards or away from the overmolded extension end. The pre-pressing block 310 and clamping block 330 are located on opposite sides of the folding block 320, and along the direction of movement of the mounting plate 340 towards the overmolded extension end, the pre-pressing block 310 is disposed downstream of the folding block 320. This allows the pre-pressing block 310 to first pre-press the overmolded extension end of the tape, the folding block 320 to fold the overmolded extension end of the tape, and the clamping block 330 to finally press the tape tightly against the first end wall 410.

[0070] Specifically, the first cylinder 360 drives the mounting plate 340 to move, and the mounting plate 340 drives the folding block 320, the pre-pressing block 310 and the pressing block 330 to move simultaneously toward or away from the protruding end of the overmolded battery. The relative positions of the folding block 320, the pre-pressing block 310 and the pressing block 330 on the mounting plate 340 are pre-adjusted according to the cylindrical battery 400 to be folded, so as to ensure that the overmolded battery 500 is pre-pressed by the pre-pressing block 310 first, then the pre-pressed overmolded battery 500 is folded by the folding block 320, and finally the folded overmolded battery 500 is pressed tightly onto the cylindrical battery 400 by the pressing block 330. This allows the folding device to complete the pre-pressing process, the folding process and the pressing process in sequence. Compared to driving the folding block 320, pre-pressing block 310 and pressing block 330 to move separately, the method provided in this embodiment is beneficial to improve the synchronization of the actions of each process of the folding device, ensure that each process does not interfere with each other, avoid the impact of the normal operation of subsequent processes due to the delay of one process, and ensure the folding effect of the coating 500 on the cylindrical battery 400.

[0071] In some embodiments, the cylinder can be replaced by an electric cylinder. Compared to a conventional cylinder that can only move back and forth between two positions (the two positions being the extended position and the retracted position), the movement path of the electric cylinder can be arbitrarily controlled, thereby improving the flexibility of the folding block 320, the pre-pressing block 310, and the clamping block 330.

[0072] In some embodiments, refer to Figure 4 A specific connection method for the mounting plate 340 is provided, wherein a slide rail 350 is provided on the folding assembly 300, and a slider is provided on the mounting plate 340. The slider is connected to the slide rail 350 so that the mounting plate 340 is slidably connected to the folding assembly 300. A first cylinder 360 is provided on the folding assembly 300 to drive the mounting plate 340 to move along the slide rail 350 toward or away from the overmolded protruding end.

[0073] Specifically, the mounting plate 340 is connected to the slide rail 350 of the folding assembly 300 via a slider. This connection method is simple, and the transmission is smooth and precise. The slide rail 350 provides guidance for the movement of the mounting plate 340, allowing it to move linearly along the slide rail 350 towards or away from the overmolded extension end, reducing swaying and shaking in other directions and improving the stability of the mounting plate 340 during movement. More preferably, in actual production, lubricant can be sprayed onto the slider or slide rail 350 to reduce friction between them, improve control precision, enhance wear resistance, and extend their service life.

[0074] Furthermore, the slide rail 350 can be detachably connected to the folding assembly 300. For example, the slide rail 350 can be connected to the folding assembly 300 by a threaded connection. This makes it easy to adjust the position of the slide rail 350. The position of the slide rail 350 can be changed according to different models of cylindrical batteries 400, thereby changing the movement range of the folding block 320, the pre-pressing block 310 and the clamping block 330.

[0075] In some embodiments, refer to Figure 4 The pressing block 330 is driven by the second cylinder 370, which drives the pressing block 330 to move toward or away from the rubber-coated protruding end.

[0076] Specifically, in addition to moving simultaneously with the mounting plate 340, the clamping block 330 can also move independently to tightly press the folded rubber 500 onto the cylindrical battery 400 along the circumference of the rubber-coated protruding end, reducing wrinkles and air bubbles caused by folding, so that the rubber 500 of the final cylindrical battery 400 is flat, ensuring the production quality and safety performance of the cylindrical battery 400.

[0077] In some embodiments, a aligning optical fiber (not shown in the figure) is provided on the support component 100 for aligning the cylindrical battery 400 after the overmolded edge 500 is folded.

[0078] In actual production applications, the process of using the folding device provided in this embodiment to fold the coating 500 on the cylindrical battery 400 is as follows:

[0079] Step S1: Cylindrical battery 400 support and positioning: After the cylindrical battery 400 is coated with glue, it is transported to the folding station by the conveyor line. The support component 100 lifts and positions the cylindrical battery 400.

[0080] Step S2: Perform a 500° fold on the extended end of the coating: The rotating component 200 drives the cylindrical battery 400 to rotate, the mounting plate 340 moves towards the extended end of the coating, the pre-pressing block 310 first contacts the tape at the extended end of the coating and presses the tape down slightly, then the folding block 320 contacts the tape and presses the tape tightly, and finally the pressing block 330 flattens the end of the tape to complete the 500° fold of the coating;

[0081] Step S3: Cylindrical battery 400 alignment: After the folding is completed, the cylindrical battery 400 continues to rotate until the alignment fiber on the support component 100 is blocked by the edge of the cover plate of the cylindrical battery 400, thus completing the alignment of the cylindrical battery 400.

[0082] Correspondingly, another embodiment of the present invention also provides a cylindrical battery production line, which includes the folding device in any of the above embodiments.

[0083] In this embodiment, specifically, the cylindrical battery production line employing the aforementioned folding device is beneficial for improving the safety performance and yield of the cylindrical battery 400, ensuring that the produced cylindrical batteries 400 are of high quality and excellent performance. Thanks to the improvements in the aforementioned folding device, the cylindrical battery production line of this embodiment has the same technical effects as the aforementioned folding device, which will not be repeated here. It should be noted that other aspects of the folding device and cylindrical battery production line disclosed in this invention can be found in the prior art, and will not be repeated here.

[0084] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A folding device for folding the overlay (500) disposed on a cylindrical battery (400), the cylindrical battery (400) including a first end wall (410), a second end wall (420) and an outer peripheral wall (430), the first end wall (410) and the second end wall (420) being disposed opposite to each other, the outer peripheral wall (430) extending from the first end wall (410) to the second end wall (420), the outer peripheral wall (430) being covered with adhesive tape, and the adhesive tape extending beyond the first end wall (410) to form an overlay protruding end, characterized in that, The folding device includes: A support assembly (100) is used to clamp the first end wall (410) and the second end wall (420). A rotating assembly (200) abuts against the outer peripheral wall (430) and is used to drive the cylindrical battery (400) to rotate; A folding assembly (300) includes a folding block (320) corresponding to the overmolded protruding end, and the folding block (320) is configured to move toward or away from the overmolded protruding end, for folding the tape at the overmolded protruding end when the cylindrical battery (400) rotates, so that the tape is attached to the first end wall (410). The folded edge block (320) has an arc groove (321) at one end near the rubber-coated protruding end. The arc groove (321) is bent away from the rubber-coated protruding end so that when the folded edge block (320) moves towards the rubber-coated protruding end, the arc groove (321) can fit against the first end wall (410). The arc groove (321) includes a first end (322) and a second end (323), which are disposed opposite to each other. The first end (322) is the end of the arc groove (321) near the rubber-coated protruding end, and the second end (323) is the end of the arc groove (321) away from the rubber-coated protruding end. The arc groove (321) extends obliquely from the first end (322) to the second end (323) along a first direction (X). Wherein, the first direction (X) is the direction in which the folded edge block (320) moves toward the end of the rubber coating, and the inclination α of the arc groove (321) satisfies: 15°≤α≤25°; The folding assembly (300) further includes a pre-compression block (310), which is disposed corresponding to the overmolded extension end and is configured to move toward or away from the overmolded extension end to pre-compress the tape at the overmolded extension end. The folding assembly (300) further includes a pressing block (330) which is disposed corresponding to the overmolded protruding end and is configured to move toward or away from the overmolded protruding end to press the tape against the first end wall (410) after the tape at the overmolded protruding end has been folded.

2. The folding device according to claim 1, characterized in that, The folding block (320), the pre-pressing block (310), and the clamping block (330) are disposed on the same mounting plate (340). The mounting plate (340) is driven by the first cylinder (360), which drives the mounting plate (340) to move toward or away from the rubber-coated protruding end. The pre-pressing block (310) and the clamping block (330) are located on both sides of the folding block (320) and move towards the rubber-coated protruding end along the mounting plate (340). The pre-pressing block (310) is located downstream of the folding block (320) so that the pre-pressing block (310) first pre-presses the rubber tape at the rubber-coated protruding end, the folding block (320) then folds the rubber tape at the rubber-coated protruding end, and the clamping block (330) finally presses the rubber tape tightly against the first end wall (410).

3. The folding device according to claim 2, characterized in that, A slide rail (350) is provided on the folding assembly (300), and a slider is provided on the mounting plate (340). The slider is connected to the slide rail (350) so that the mounting plate (340) is slidably connected to the folding assembly (300). The first cylinder (360) is disposed on the folding assembly (300) so as to drive the mounting plate (340) to move along the slide rail (350) toward or away from the rubber-coated protruding end.

4. The folding device according to claim 2, characterized in that, The clamping block (330) is driven by the second cylinder (370), which drives the clamping block (330) to move toward or away from the rubber-coated protruding end.

5. The folding device according to any one of claims 1 to 4, characterized in that, The support component (100) is provided with an alignment fiber for aligning the cylindrical battery (400).

6. A cylindrical battery production line, characterized in that, Includes the folding device according to any one of claims 1 to 5.

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