A full-tab battery cell spin-sticking and potting device

Abstract

The utility model discloses a kind of full tab electric core spin pasting encapsulating device, comprising: rack;Electric core compression positioning mechanism;Lifting mechanism;Rotary drive mechanism;Inner side imitates round main drive disc, with the output shaft of rotary drive mechanism is connected;Outer side split rotary clamping disc, coaxial sleeve is arranged in the outside of inner side imitates round main drive disc;Multiple tension springs, between outer side split rotary clamping disc and rack are connected;Multiple split rotary retractable sheet, it is evenly arranged along circumference, and one end of each split rotary retractable sheet is rotatably mounted on outer side split rotary clamping disc by pivot axle. By inner side imitates round main drive disc rotation, drive multiple split rotary retractable sheet synchronous pivot inward, form a dynamic retractable simulation torus, 360° uniform speed, synchronous spinning covering to upright adhesive tape is realized, fundamentally eliminates wrinkle and uneven phenomenon, significantly improves encapsulating quality and yield.

Description

Technical Field

[0001] This utility model relates to the field of battery cell processing, and in particular to a device for rotating and coating all tab battery cells. Background Technology

[0002] In the manufacturing process of lithium-ion batteries, especially all-tab cells, it is necessary to perform insulating coating on the positive electrode current collector. Current technologies generally employ pre-pressing with a mold bevel or simple mechanical bending for coating. These methods have significant drawbacks: the adhesive tape is prone to wrinkling and uneven adhesion during the coating process, leading to poor insulation or short-circuit risks; furthermore, the uniformity and consistency of the coating are difficult to guarantee, heavily relying on operational precision, resulting in low production yields and becoming a bottleneck for improving battery safety and production efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a device for rotating and coating omnipolar battery cells to solve the above-mentioned problems.

[0004] According to one aspect of this utility model, a device for rotary coating of omnipolar battery cells is provided, comprising: a frame; a battery cell pressing and positioning mechanism disposed on the frame for fixing the battery cell to be coated; a lifting mechanism disposed on the frame; a rotary drive mechanism installed at the output end of the lifting mechanism; an inner circular main drive disk connected to the output shaft of the rotary drive mechanism; an outer split rotary positioning disk coaxially sleeved outside the inner circular main drive disk; multiple tension springs connected between the outer split rotary positioning disk and the frame or the lifting mechanism; and multiple split rotary collectors. The retractable sheets are evenly arranged circumferentially. One end of each retractable sheet is rotatably mounted on the outer retractable rotating positioning disk via a pivot shaft. The inner sidewall of the retractable sheet contacts the outer contour of the inner imitation circular main drive disk. When the rotary drive mechanism drives the inner imitation circular main drive disk to rotate, the contact between the outer contour of the retractable sheet and the retractable sheet drives all the retractable sheets to pivot synchronously inward, forming a simulated shrinking ring for 360° spin-wrapping of the upright adhesive tape of the battery cell positive electrode.

[0005] In some embodiments, the battery cell pressing and positioning mechanism includes a conveyor belt, positioning seats, and a pressing cylinder. The conveyor belt is located below the lifting mechanism, and multiple positioning seats are spaced apart on the conveyor belt. Each positioning seat has a receiving slot for accommodating the battery cell. The pressing cylinder is located on one side of the conveyor belt, and the output end of the pressing cylinder faces the positioning seat. The output end of the pressing cylinder is provided with a pressing block for pressing the battery cell against the positioning seat.

[0006] In some embodiments, the outer contour of the inner circular main drive disk is a regular hexagon.

[0007] In some embodiments, the number of the split-type rotating shrink sheet is six.

[0008] In some embodiments, the lifting mechanism is a lifting cylinder, and the rotary drive mechanism is a rotary cylinder.

[0009] In some embodiments, the working end of the split-type rotary shrink sheet is provided with a kneading head for flattening the tape.

[0010] In some embodiments, each of the split-type rotary shrink sheet is provided with a guide rod at its top, and the inner circular main drive disk is provided with a guide groove corresponding to the guide rod. When the rotary drive mechanism drives the inner circular main drive disk to rotate, the guide rod slides along the guide groove to assist the split-type rotary shrink sheet to pivot inward synchronously.

[0011] In some embodiments, a control system is also included, which is signal-connected to the lifting mechanism, the rotary drive mechanism and the cell pressing and positioning mechanism, and is used to control each mechanism to work together according to a preset program to achieve automated production cycle.

[0012] In some embodiments, the outer contour of the inner circular main drive disk is an equilateral polygon or an approximate circle formed by fitting multiple circular arcs.

[0013] Compared with the prior art, the beneficial effects of this application are as follows:

[0014] This application utilizes an inner circular main drive disc to rotate, driving multiple separate rotating shrink discs to pivot synchronously inward, forming a dynamically shrinking simulated ring. This achieves 360° uniform and synchronous spinning and wrapping of upright adhesive tape, fundamentally eliminating wrinkles and unevenness, and significantly improving wrapping quality and yield. This mechanism transforms simple rotational motion into precise radial shrinking motion, with a compact and ingenious structure and stable and reliable operation. By incorporating conveyor belts, positioning seats, etc., it can be seamlessly integrated with the production line to achieve fully automated operation, greatly improving production efficiency and reducing labor costs and operational difficulty. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the connection structure between the rotary drive mechanism and the inner circular main drive disk of this utility model.

[0017] Figure 3 This is a schematic diagram of the connection structure between the tension spring and the outer split rotating locking disc of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the inner imitation circular main drive disk and the outer split rotating positioning disk of this utility model.

[0019] Figure 5 for Figure 4 A schematic diagram of the structure behind the concealed inner circular main drive disk. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] refer to Figures 1 to 5 This application provides a device for rotary coating of all-tab battery cells, comprising: a frame; a cell pressing and positioning mechanism disposed on the frame for fixing the battery cell to be coated; a lifting mechanism 1 disposed on the frame; a rotary drive mechanism 2 installed at the output end of the lifting mechanism 1; an inner circular main drive disk 3 connected to the output shaft of the rotary drive mechanism 2; an outer split rotary positioning disk 4 coaxially sleeved outside the inner circular main drive disk 3; multiple tension springs 5 ​​connected between the outer split rotary positioning disk 4 and the frame or the lifting mechanism 1; and multiple split rotary shrink plates 6, along... The circumferentially uniformly arranged, one end of each of the split-type rotating shrink sheet 6 is rotatably mounted on the outer split-type rotating positioning disk 4 via a pivot shaft 7. The inner sidewall of the split-type rotating shrink sheet 6 is in contact with the outer contour of the inner imitation circular main drive disk 3. When the rotating drive mechanism 2 drives the inner imitation circular main drive disk 3 to rotate, all the split-type rotating shrink sheets 6 are driven to pivot inward synchronously through the contact between the outer contour of the split-type rotating shrink sheet 6 and the split-type rotating shrink sheet 6, forming a simulated shrinking ring for 360° spin-coating and wrapping the upright tape of the battery cell positive electrode.

[0022] The rotation of the inner circular main drive disk 3 drives multiple split-type rotating shrinking pieces 6 to pivot synchronously inward, forming a dynamic and uniformly shrinking simulated ring. This structure ingeniously transforms a simple rotational input into a complex and precise radial synchronous shrinking motion, thereby achieving 360° all-round, no-dead-angle spin-coating of the upright adhesive tape on the positive electrode of the battery cell. This mechanical contour-following coating method fundamentally solves the technical problems of easy wrinkling and uneven adhesion of adhesive tape in traditional processes, significantly improving the yield and consistency of coating.

[0023] In some embodiments, the battery cell pressing and positioning mechanism includes a conveyor belt, positioning seats, and a pressing cylinder 8. The conveyor belt is located below the lifting mechanism 1, and multiple positioning seats are spaced apart on the conveyor belt. Each positioning seat has a receiving slot for accommodating the battery cell. The pressing cylinder 8 is located on one side of the conveyor belt, with its output end facing the positioning seat and equipped with a pressing block 9 for pressing the battery cell against the positioning seat. By setting up the conveyor belt, the positioning seat with the receiving slot, and the pressing cylinder 8, automatic assembly line feeding, precise positioning, and reliable pressing of the battery cells are achieved. This structure not only ensures the positional accuracy of each battery cell during the coating process, avoiding poor coating due to battery cell movement, but also achieves seamless connection with the preceding and following processes, greatly improving the automation level and production efficiency of the entire production process.

[0024] In some embodiments, the outer contour of the inner circular main drive disk 3 is a regular hexagon. The design of the inner circular main drive disk 3 with a regular hexagonal contour offers advantages such as ease of processing and low cost. During rotation, it provides six distinct and stable drive phases, thereby precisely and reliably driving the six shrink-fit pieces to complete the "open-close-reset" cyclic action. The characteristics of the regular hexagonal contour achieve a good balance between shrinkage stroke and motion smoothness, ensuring a stable and controllable overmolding process.

[0025] In some embodiments, the number of the split-type rotary shrink sheet 6 is six. Matching the six split-type rotary shrink sheet 6 with the regular hexagonal drive disk ensures balanced force distribution and smoother movement of the mechanism. The six shrink sheets can form a sufficiently dense envelope in the circumferential direction, ensuring uniform force distribution on the tape during shrinkage, thereby achieving a more rounded and smoother coating effect.

[0026] In some embodiments, the lifting mechanism 1 is a lifting cylinder, and the rotary drive mechanism 2 is a rotary cylinder. Using lifting and rotary cylinders as power sources offers advantages such as compact structure, fast response speed, simple control, and low cost. Cylinder technology is mature, easy to integrate with pneumatic systems in industrial settings, and convenient to maintain, making it ideal for achieving such high-frequency, short-stroke automated motion requirements.

[0027] In some embodiments, the working end of the split-type rotary shrink sheet 6 is provided with a kneading head for flattening the adhesive tape. The kneading head, made of an elastic or flexible material (such as silicone or polyurethane), provides cushioning when pressing the tape, preventing rigid impacts from scratching the battery cell or tape surface. Simultaneously, the flexible pressing action better adapts to minor unevenness in the surface, and the "kneading" action more effectively removes air, resulting in a tighter and more secure tape adhesion.

[0028] In some embodiments, a guide rod 10 is disposed at the top of each of the split rotary contracting pieces 6, and a guide groove 11 is disposed on the inner approximate-circle main drive plate 3 corresponding to the guide rod 10. When the rotary drive mechanism 2 drives the inner approximate-circle main drive plate 3 to rotate, the guide rod 10 slides along the guide groove 11 to assist the split rotary contracting pieces 6 in pivoting synchronously inward. By additionally providing the auxiliary guide mechanism composed of the guide rod 10 and the guide groove 11, an accurate trajectory constraint is provided for the pivoting motion of each split rotary contracting piece 6. This greatly enhances the synchronization and stability of the entire contracting piece assembly during the movement process, prevents the jamming or asynchronous phenomenon of a single contracting piece caused by uneven stress, and further ensures the roundness of the rubber-coated ring shape and the reliability of the rubber coating quality.

[0029] In some embodiments, the device further comprises a control system, which is in signal connection with the lifting mechanism 1, the rotary drive mechanism 2 and the cell pressing and positioning mechanism, and is configured to control the coordinated action of each mechanism according to a preset program to achieve an automated production rhythm. By integrating the control system and performing linkage control on the lifting mechanism 1, the rotary drive mechanism 2 and the cell pressing and positioning mechanism, the full automation of the entire rubber coating process is realized. The system can accurately control the sequence and rhythm of each action according to the preset program, which ensures a high degree of consistency and reliability in the production process, significantly reduces the labor intensity and skill requirements for manual operations, and is particularly suitable for large-scale continuous production.

[0030] In some embodiments, the outer contour of the inner approximate-circle main drive plate 3 is an equilateral polygon or an approximate circle formed by fitting a plurality of arc segments. Defining the contour of the drive plate as a broader equilateral polygon or an approximate circle formed by fitting a plurality of arc segments broadens the design flexibility of the present utility model. Different contour curves can correspond to different contraction motion rules, for example, adopting a polygon with a higher number of sides or a specific curve can make the contraction process smoother. This enables the device to better adapt to the rubber coating requirements of different sizes and different adhesive tape characteristics, and improves the universality and adaptability of the technology.

[0031] The core of the processing principle lies in accurately converting simple rotary motion into synchronous radial contraction motion through a profiling mechanism, so as to realize profiling coating of the upright adhesive tape. The whole process can be broken down as follows:

[0032] First principle stage: Preparation and positioning

[0033] The processing begins with the conveying and precise positioning of the battery cell. The battery cell is conveyed to the work station by a conveyor belt and embedded into the receiving groove of the positioning seat. Subsequently, the clamping cylinder 8 is activated, driving the clamping block 9 to firmly press the battery cell onto the positioning seat, ensuring that the battery cell does not shift during the subsequent overlay process. At the same time, the lifting mechanism 1 drives the entire rotating head above to descend, so that the annular structure formed by the split rotating shrink sheet 6, which is initially open, descends smoothly and is fitted onto the outside of the adhesive tape on which the positive electrode of the battery cell stands upright.

[0034] Second Principle Stage: Motion Conversion and Contouring Contraction

[0035] This is the most crucial stage of the processing principle. The rotary drive mechanism 2 is activated, driving the inner circular main drive disk 3 to rotate. Since the inner walls of the multiple split rotary shrink discs 6 always maintain contact with the outer contour of the drive disk, the continuous change of the outer contour from the "edge" to the "corner" when the drive disk rotates is equivalent to providing a continuous inward thrust to the inner wall of each shrink disc.

[0036] This thrust forces all the split-type rotating shrink sheets 6 to pivot synchronously and uniformly inward around their pivot axis 7 on the outer split-type rotating positioning disk 4. The kneading heads at the ends of multiple shrink sheets collectively simulate a dynamic ring with a continuously and uniformly decreasing diameter.

[0037] Third Principle Stage: Spin Coating and Shaping

[0038] The aforementioned dynamically shrinking ring contacts and wraps around the upright adhesive tape from all 360° angles. This principle differs from simple vertical pressure; instead, it uses a wraparound, progressive kneading motion to smoothly fold the tape inwards and firmly adhere it to the surface of the positive current collector of the battery cell. The continuous pressure during the shrinking process effectively eliminates air between the tape and the current collector, ensuring a smooth, wrinkle-free application. When the drive disc rotates to a predetermined angle, the ring shrinks to its minimum diameter, completing the final encapsulation and shaping.

[0039] Fourth Principle Stage: Reset and Loop

[0040] After the coating process is completed, the rotary drive mechanism 2 reverses, and the inner circular main drive disk 3 rotates in the opposite direction. Under the restoring force of the tension spring 5 and the reverse drive of the drive disk contour, the split rotary shrink sheet 6 pivots outward synchronously, returning to its initial open state. Subsequently, the lifting mechanism 1 drives the coating head to rise, the cell pressing mechanism releases, and the coated cell is conveyed away by the conveyor belt. The next cell to be processed enters the working position, and a new processing cycle begins.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A device for rotating and coating a multi-tab battery cell, characterized in that, include: frame; A cell pressing and positioning mechanism is installed on the frame to fix the cell to be coated with glue; A lifting mechanism is mounted on the frame; A rotary drive mechanism is installed at the output end of the lifting mechanism; The inner circular main drive disk is connected to the output shaft of the rotary drive mechanism; The outer split rotating positioning disc is coaxially sleeved on the outside of the inner imitation circular main drive disc; Multiple tension springs are connected between the outer split rotating positioning disc and the frame or the lifting mechanism; Multiple split-type rotating shrinkable pieces are evenly arranged circumferentially. One end of each split-type rotating shrinkable piece is rotatably mounted on the outer split-type rotating positioning disk via a pivot shaft. The inner sidewall of the split-type rotating shrinkable piece is in contact with the outer contour of the inner imitation circular main drive disk. When the rotary drive mechanism drives the inner circular main drive disk to rotate, the outer contour of the split rotary shrink sheet contacts the split rotary shrink sheet, driving all the split rotary shrink sheets to pivot inward synchronously, forming a simulated shrink ring, which is used to spin-wrap the upright tape of the battery cell positive electrode in 360°.

2. The omnipolar tab cell rotary bonding and coating device according to claim 1, characterized in that, The battery cell pressing and positioning mechanism includes a conveyor belt, positioning seats, and pressing cylinders. The conveyor belt is located below the lifting mechanism, and multiple positioning seats are spaced apart on the conveyor belt. Each positioning seat has a receiving slot for accommodating the battery cell. The pressing cylinder is located on one side of the conveyor belt, and the output end of the pressing cylinder faces the positioning seat. The output end of the pressing cylinder is provided with a pressing block for pressing the battery cell against the positioning seat.

3. The omnipolar tab cell rotary bonding and coating device according to claim 1, characterized in that, The outer contour of the inner circular main drive disk is a regular hexagon.

4. The device for rotating and coating the all-pole battery cell according to claim 1, characterized in that, The number of the split-type rotating shrink sheet is six.

5. The omnipolar tab cell rotary bonding and coating device according to claim 1, characterized in that, The lifting mechanism is a lifting cylinder, and the rotary drive mechanism is a rotary cylinder.

6. The device for rotating and coating omnipolar battery cells according to claim 1, characterized in that, The working end of the split-type rotary shrink sheet is equipped with a kneading head for flattening the tape.

7. The omnipolar tab cell rotary bonding and coating device according to claim 1, characterized in that, Each of the split-type rotating shrink sheet is provided with a guide rod at its top, and the inner circular main drive disk is provided with a guide groove corresponding to the guide rod. When the rotating drive mechanism drives the inner circular main drive disk to rotate, the guide rod slides along the guide groove to assist the split-type rotating shrink sheet to pivot inward synchronously.

8. The omnipolar tab cell rotary bonding and coating device according to claim 1, characterized in that, It also includes a control system, which is signal-connected to the lifting mechanism, the rotary drive mechanism and the cell pressing and positioning mechanism, and is used to control each mechanism to work together according to a preset program to achieve automated production cycle.

9. The omnipolar tab cell rotary bonding and coating device according to claim 1, characterized in that, The outer contour of the inner circular main drive disk is an equilateral polygon or an approximate circle formed by fitting multiple circular arcs.

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