Rubber coating equipment for battery cell

Abstract

The utility model discloses a battery cell rubber coating device which comprises a rubber coating conveying line, a rubber cutting device, a rubber coating device and a rubber pressing device, the rubber cutting device, the rubber coating device and the rubber pressing device are arranged on the rubber coating conveying line, in the conveying direction of the rubber coating conveying line, the rubber cutting device is arranged in front of the rubber pressing device, and a rubber belt is provided with a cutting edge and a non-cutting edge in the length direction; the adhesive cutting device is used for cutting the cutting edge of the adhesive tape for multiple times so as to form a plurality of adhesive sections on the cutting edge of the adhesive tape; the rubber coating device is used for winding a rubber belt on the head of the battery cell, and the cutting edge protrudes out of the head; the glue pressing device is used for pressing the multiple glue sections to the end face of the head. According to the rubber coating equipment, the problem of rubber coating wrinkles can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production and manufacturing, and in particular to a battery cell encapsulation device. Background Art

[0002] The battery manufacturing process involves multiple tooling steps such as flattening, encapsulation, shell insertion and collector plate welding. As the demand for batteries continues to rise, industrial production has set higher goals for battery manufacturing efficiency.

[0003] Among them, the battery cell structure formed by winding the positive and negative electrodes needs to be coated with glue at both ends before being put into the shell after being flattened and compacted to prevent the electrodes from loosening during subsequent processing. Currently, after coating, the insulating tape is flattened by a flattening device. After flattening, the surface area becomes smaller, and the tapes are squeezed against each other, resulting in wrinkles. In severe cases, the tape even curls up, thus losing the insulation effect, which also reduces the yield of placing insulating gaskets on the tape in the subsequent process. Utility Model Content

[0004] The present application provides a rubber coating device for a battery cell to solve the current technical problem of poor insulation effect caused by wrinkles in the rubber coating.

[0005] In order to solve the above technical problems, the present application provides a rubber coating equipment, including: a rubber coating conveyor line, and a rubber cutting device, a rubber coating device and a rubber pressing device arranged on the rubber coating conveyor line. In the conveying direction of the rubber coating conveyor line, the rubber cutting device is arranged before the rubber pressing device, and the tape has a cutting edge and a non-cutting edge along the length direction; the rubber cutting device is used to cut the cutting edge of the tape multiple times to form a plurality of rubber segments on the cutting edge of the tape; the rubber coating device is used to wrap the tape around the head of the battery cell, and the cutting edge protrudes from the head; the rubber pressing device is used to press the plurality of rubber segments toward the end face of the head.

[0006] In one embodiment, the rubber cutting device is arranged before the rubber wrapping device, and the rubber cutting device is movably arranged relative to the adhesive tape in the length direction of the adhesive tape.

[0007] In one embodiment, the glue cutting device is arranged behind the glue encapsulating device, and the glue cutting device is rotatably arranged relative to the battery cell around the central axis of the battery cell.

[0008] In one embodiment, the adhesive tape cutting device is a laser cutting lens for cutting the adhesive tape.

[0009] In one embodiment, the plastic segment cut out by laser cutting the lens is a parallelogram, and the side length of the plastic segment of the parallelogram is greater than or equal to 110 mm.

[0010] In one embodiment, the distance from the end of the adhesive segment connected to the adhesive tape to the end surface of the head is greater than or equal to 1 mm.

[0011] In one embodiment, the glue pressing device includes a plurality of glue pressing heads for simultaneously pressing a plurality of glue segments toward the end surface of the head.

[0012] In one embodiment, the glue pressing device includes a single glue pressing head. The glue pressing device is rotatably arranged around the central axis of the battery core relative to the battery core. The single glue pressing head presses the multiple glue segments toward the end surface in sequence.

[0013] In one embodiment, the rubber coating equipment also includes: a rubber storage device and a rubber cutting device arranged on the rubber coating conveyor line; the rubber storage device includes multiple rollers and clamps, the tape is placed on the multiple rollers, and the clamps are used to clamp the tape on the multiple rollers; the rubber cutting device is used to cut the tape.

[0014] In one embodiment, the rubber coating device also includes a lifting mechanism and a rotating mechanism arranged on the rubber coating conveyor line, the lifting mechanism is arranged before the rubber cutting device, and the rotating mechanism is arranged after the rubber cutting device; the lifting mechanism is used to push the battery cell to the adhesive tape, and the rotating mechanism is used to drive the battery to rotate.

[0015] The glue coating equipment of the present application includes: a glue coating conveyor line, and a glue cutting device, a glue coating device and a glue pressing device arranged on the glue coating conveyor line. In the conveying direction of the glue coating conveyor line, the glue cutting device is arranged before the glue pressing device, and the tape has a cutting edge and a non-cutting edge along the length direction; the glue cutting device is used to cut the cutting edge of the tape multiple times to form multiple glue segments on the cutting edge of the tape; the glue coating device is used to wrap the tape around the head of the battery cell, and the cutting edge protrudes from the head; the glue pressing device is used to press the multiple glue segments toward the end face of the head. In the present application, after the glue is coated on the battery cell, the tape is cylindrical, and the tape above the end is cut into multiple glue segments, so it can fit after being flattened, and wrinkles are not easy to appear, which can ensure the yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the rubber encapsulation equipment of the present application;

[0018] Figure 2 This is a schematic diagram of the working process of an embodiment of the encapsulation equipment of the present application;

[0019] Figure 3 This is a schematic diagram of the structure after the tape is cut in one embodiment of the rubber laminating equipment of the present application;

[0020] Figure 4This is a schematic diagram of the structure of a cylindrical battery cell after being encapsulated in an embodiment of an encapsulation device of the present application;

[0021] Figure 5 It is a schematic diagram of the structure of the cylindrical battery cell after glue pressing in one embodiment of the glue encapsulation equipment of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It will be appreciated that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some but not all structures related to the present application are shown in the drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the art without making creative work are within the scope of protection of the present application.

[0023] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0024] See also Figure 1-5 The encapsulation equipment of the present application is used to encapsulate battery cells, for example, it can be used to encapsulate cylindrical battery cells, and can also be used for other cylindrical batteries. Taking cylindrical batteries as an example, in the manufacturing process of cylindrical batteries, the positive and negative electrode sheets are wound to form a cylindrical battery cell structure, which is flattened and compacted, and then the encapsulation process is carried out. The encapsulation process is mainly for the head and end of the battery cell to perform a certain insulation and fixing effect on the electrode sheet. The positive electrode head or the negative electrode head can be encapsulated. The following description takes the positive electrode head as an example.

[0025] The encapsulation equipment 100 of this embodiment includes an encapsulation conveyor line 11, which is a conveyor production line for the cylindrical cell encapsulation process, used to convey cylindrical cells to various workstations and cooperate with other devices to achieve process operations. The conveyor production line includes cell transport equipment and an installation bracket, and the installation bracket is used to install other devices in the encapsulation equipment.

[0026] Please refer to Figure 1 The rubber wrapping equipment also includes a rubber cutting device 12, a rubber wrapping device 13 and a rubber pressing device 14. In the conveying direction of the rubber wrapping conveyor line, the rubber cutting device 12 is arranged before the rubber pressing device 14, and the rubber wrapping device 13 is also arranged before the rubber pressing device 14. The rubber wrapping device 13 can be arranged before or after the rubber cutting device 12.

[0027] The adhesive wrapping device 100 wraps the adhesive tape 200 on the positive electrode head of the cylindrical battery cell 300. The adhesive tape 200 has two sides in the length direction. For the convenience of description, the two sides are defined as a cutting side and a non-cutting side. The non-cutting side is wrapped and attached to the side of the positive electrode head of the cylindrical battery cell 300, and the cutting side is wrapped and attached to the end face of the positive electrode head of the cylindrical battery cell 300.

[0028] The glue cutting device 12 is used to cut the cutting edge of the tape 200 multiple times to form multiple glue segments 21; the glue cutting device 12 can be a laser cutting lens, which uses laser to achieve cutting, and can achieve more accurate cutting for the tape 200. In this embodiment, the cut glue segment 21 is a square sheet attached to the tape 200. In other embodiments, it can also be cut into other shapes according to actual conditions. And in order to facilitate the liberalization control on the production line, the tape can be cut at equal intervals. The width L of the cut glue segment can be designed according to the size of the cylindrical battery cell 300. The larger the diameter of the cylindrical battery cell 300, the larger the width L of the glue segment can be. The number of cut glue segments can be 3 to 10. The fewer the number, the larger the width L of the glue segment, and the wider the width of the glue segment, the easier it is to wrinkle after glue pressing. In this embodiment, the side length of the glue segment is designed to be greater than or equal to 110 mm. For details, please refer to Figure 3 .

[0029] The glue wrapping device 13 is used to wrap the tape 200 on the positive electrode head of the cylindrical battery cell 300. During the glue wrapping process, the glue wrapping device 13 controls the length of the glue wrapping, that is, controls the length of the glue wrapping on the side and end faces of the cylindrical battery cell 300. In this embodiment, the cutting edge of the tape 200 is controlled to exceed the end face of the positive electrode head of the cylindrical battery cell 300 by 6 mm, and the root 22 of the cut glue segment, that is, the end of the glue segment connected to the tape, is greater than or equal to 1 mm from the end face of the positive electrode head.

[0030] There is no limitation on the order of the rubber cutting device 12 and the rubber wrapping device 13. The tape can be cut first and then wrapped around the cylindrical battery cell, and the rubber cutting device 12 is movably arranged relative to the tape 200 in the length direction of the tape; or the cylindrical tape can be cut after the tape is wrapped around the cylindrical battery cell, and the rubber cutting device 12 is rotatably arranged relative to the cylindrical battery cell 300 around its central axis.

[0031] The glue pressing device 14 is used to press the multiple glue segments 21 toward the end surface of the positive electrode head after the glue encapsulation device 13 completes the glue encapsulation. The glue pressing device 14 may include multiple glue pressing heads 141, such as Figure 1The number of the multiple glue pressing heads 141 can be set to be consistent with the number of glue segments, or can be set to be less than the number of glue segments. The multiple glue pressing heads 141 can press multiple glue segments toward the end surface at the same time. The glue pressing heads 141 move toward the central axis of the cylindrical battery cell 300, that is, the glue segment extending out of the head of the cylindrical battery cell 300 can be pressed toward the end surface of the cylindrical battery cell 300. When the multiple glue pressing heads move simultaneously to press the glue segment toward the end surface, the glue pressing heads are arranged in a circular shape, with the cylindrical battery cell as the same central axis, and the multiple glue pressing heads move inward at the same time to press the glue segment toward the end surface at the same time. The glue pressing device 14 can also include a single glue pressing head. In this case, the glue pressing device 14 is rotatably arranged relative to the cylindrical battery cell 300 around its central axis, and can press multiple glue segments toward the end surface in sequence during the relative rotation. Pressing multiple glue segments to the end face at the same time can make use of the existing glue pressing head and reduce the cost of changing the production line equipment. However, pressing multiple glue segments to the end face at the same time may cause mutual interference between the glue segments, and a single glue pressing head is more conducive to the quality of glue pressing. Figure 4 and Figure 5 .

[0032] In this embodiment, a cutting device is provided to cut a plurality of adhesive sections at the cutting edge of the adhesive tape, so that the adhesive tape can be evenly attached after being pressed, and wrinkles are not likely to occur, thereby ensuring the adhesive encapsulation yield.

[0033] The glue encapsulation device 100 of this embodiment further includes a glue storage device 15 and a glue cutting device 16 which are also arranged on the glue encapsulation conveyor line. The glue storage device 15 is used to place the glue tape, and the glue cutting device 16 is used to cut the glue tape of a certain length to encapsulate a single cylindrical battery cell.

[0034] The adhesive storage device 15 specifically includes a plurality of rollers 151, on which the adhesive tape 200 is wound to realize an automated production line, and also includes a clamp 152, which is used to pull the adhesive tape from the roller 151 for adhesive coating. The adhesive coating device 13 and the adhesive cutting device 16 are specifically implemented, and the adhesive coating device 13 specifically includes a lifting mechanism 131 and a rotating mechanism 132, wherein the lifting mechanism 131 is arranged before the adhesive cutting device 16, and the rotating mechanism 132 is arranged after the adhesive cutting device 16.

[0035] After the clamp 152 pulls out a length of tape, the lifting mechanism 131 pushes the cylindrical battery cell 300 to the tape position, so that the head of the cylindrical battery cell 300 is attached to the tape, and the tape partially extends out of the head of the battery cell. Then the adhesive cutting device 16 is used to cut the cylindrical battery cell 300 pasting position of the tape. One end of the cut tape is attached to the cylindrical battery cell 300, and the other end is clamped by the clamp 152. The rotating mechanism 132 is then used to drive the cylindrical battery cell 300 to move and rotate in the direction of the clamp 152; or the rotating mechanism 132 drives the cylindrical battery cell 300 to rotate, and the clamp 152 moves toward the battery cell 300 at the same time, and then the cut tape can be wound and attached to the cylindrical battery cell 300.

[0036] like Figure 2 The entire process of the rubber coating device 100 in this embodiment includes: rubber drawing, rubber cutting, rubber breaking, rubber coating, and rubber pressing. In other embodiments, it can also be rubber drawing, rubber breaking, rubber coating, rubber cutting, and rubber pressing.

[0037] Among them, the rubber pulling is realized by the rubber storing device 15, the rubber cutting is realized by the rubber cutting device 12, the rubber breaking is realized by the rubber breaking device 16, the rubber wrapping is realized by the rubber wrapping device 13, and the rubber pressing is realized by the rubber pressing device 14.

[0038] After the rubber encapsulation device of this embodiment is encapsulated on the cylindrical battery cell, the tape is cylindrical, and the tape above the end is cut into multiple rubber segments, so it can fit after being flattened, is not prone to wrinkles, and can ensure the yield.

[0039] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0040] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A battery core encapsulation device, characterized in that: The rubber-wrapping equipment comprises: a rubber-wrapping conveying line, and a rubber-cutting device, a rubber-wrapping device and a rubber-pressing device arranged on the rubber-wrapping conveying line. In the conveying direction of the rubber-wrapping conveying line, the rubber-cutting device is arranged before the rubber-pressing device, and the adhesive tape has a cutting edge and a non-cutting edge along the length direction; The rubber cutting device is used to cut the cutting edge of the adhesive tape multiple times to form multiple rubber segments on the cutting edge of the adhesive tape; The adhesive wrapping device is used to wrap the adhesive tape around the head of the battery cell, and the cutting edge protrudes from the head; The glue pressing device is used to press the plurality of glue segments toward the end surface of the head.

2. The rubber encapsulation equipment according to claim 1, characterized in that: The rubber cutting device is arranged before the rubber wrapping device, and the rubber cutting device is movably arranged relative to the adhesive tape in the length direction of the adhesive tape.

3. The rubber encapsulation equipment according to claim 1, characterized in that: The glue cutting device is arranged behind the glue encapsulating device, and the glue cutting device is arranged to rotate relative to the battery core around the central axis of the battery core.

4. The rubber encapsulation equipment according to claim 1, characterized in that: The adhesive tape cutting device is a laser cutting lens, which is used to cut the adhesive tape.

5. The rubber encapsulation equipment according to claim 4, characterized in that: The rubber segment cut out by the laser cutting lens is a parallelogram, and the side length of the rubber segment of the parallelogram is greater than or equal to 110 mm.

6. The rubber encapsulation equipment according to claim 1, characterized in that: The distance between the end of the adhesive segment connected to the adhesive tape and the end surface of the head is greater than or equal to 1 mm.

7. The rubber encapsulation equipment according to any one of claims 1 to 6, characterized in that: The glue pressing device comprises a plurality of glue pressing heads, which are used to press the plurality of glue segments toward the end surface of the head simultaneously.

8. The rubber encapsulation equipment according to any one of claims 1 to 6, characterized in that: The glue pressing device comprises a single glue pressing head, and the glue pressing device is rotatably arranged around the central axis of the battery core relative to the battery core, and the single glue pressing head sequentially presses the plurality of glue segments toward the end surface.

9. The rubber encapsulation equipment according to claim 1, characterized in that: The rubber coating equipment further includes: a rubber storage device and a rubber cutting device arranged on the rubber coating conveying line; The adhesive storage device comprises a plurality of rollers and clamping claws, the adhesive tape is placed on the plurality of rollers, and the clamping claws are used to clamp the adhesive tape on the plurality of rollers; The adhesive cutting device is used for cutting the adhesive tape.

10. The rubber encapsulation equipment according to claim 9, characterized in that: The rubber bagging device further comprises a lifting mechanism and a rotating mechanism arranged on the rubber bagging conveying line, wherein the lifting mechanism is arranged before the rubber cutting device, and the rotating mechanism is arranged after the rubber cutting device; The lifting mechanism is used to push the battery core to the tape, and the rotating mechanism is used to drive the cylindrical battery to rotate.

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