A pole winding device

Abstract

The utility model discloses an electrode roll tape connecting device, including work table, be equipped with tape connecting area on the work table, be equipped with paint spraying device at tape connecting area position on the work table, paint spraying device connects drive mechanism, be provided with electrode roll pressure knife in the top of work table and be located at the both sides of paint spraying device, be equipped with the drying device of being able to cover tape connecting area in the top of work table. The present application carries out spray washing to the broken electrode roll joint position through paint spraying device, then utilizes drying device and carries out baking solidification, can solve the problem of secondary broken tape caused by the falling of rubberizing process tape, the sticking not level etc., does not exist the risk of falling in later period, improves production efficiency, reduces the time loss produced in manual tape connecting process, can be done thinner than normal tape simultaneously, and the adhesion effect is better, the present application replaces manual rubberizing tape connecting process through UV printing process technology, and paint spraying device can carry out the gland to tape connecting area, can prevent paint from leaking to normal electrode roll, and the positive and negative electrode roll is protected.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, specifically to an electrode winding and splicing device. Background Technology

[0002] In the hot composite lamination process of positive and negative electrode roll production and assembly of lithium-ion batteries, there are problems such as electrode roll breakage and roll splicing. After each occurrence, tape needs to be pasted on the positions before and after the breakage to splice the tape. The pasting takes a long time and requires good horizontal bonding. If the pasting effect is poor, there will be secondary tearing. After pasting, the electrode roll is affected by the pasting stress, which causes about 8mm of foil before and after to be scrapped, resulting in increased production costs.

[0003] For example, existing patent document CN113682856A specifically discloses an electrode splicing device. This device is used to attach adhesive tape to the splicing position of the electrode and includes an unwinding assembly, a feeding assembly, a shearing assembly, and an adhesive applicator. These assemblies are arranged sequentially along the extension direction of the electrode. The feeding assembly pulls the adhesive tape along the extension direction of the electrode, allowing it to pass sequentially through the shearing and adhesive applicators. The feeding assembly picks up the tape and delivers it to the adhesive applicator. After a suction plate absorbs a predetermined length of tape, the shearing assembly cuts the tape. At this point, the suspended portion of the tape is located in the extension direction of the electrode, and the tape is the same width as the electrode. This patent document uses adhesive tape for splicing.

[0004] The following are the drawbacks of applying adhesive tape: ① The tape is not level, and the tape breaks twice at the attachment position after the tape is started. This requires manual tape threading and splicing twice, and each threading causes about 20 minutes of downtime. ② It causes additional foil scrapping. Every time a splicing action occurs, the equipment needs to perform nearby foil scrapping and electrode roll alignment actions. All electrode rolls within this range need to be scrapped and cannot be used, resulting in increased costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is: how to solve the problem of secondary tape breakage that is prone to occur in the traditional polar roll splicing method.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: An electrode coil splicing device includes a worktable with a splicing area on the worktable. A painting device is provided at the splicing area on the worktable and is connected to a drive mechanism. Electrode coil pressing knives are provided above the worktable and on both sides of the painting device. A drying device capable of covering the splicing area is provided above the worktable.

[0007] This application uses a spray painting device to spray and wash the seam of the broken electrode roll, and then uses a drying device to bake and cure it. This can solve the problem of tape falling off and uneven bonding during the adhesive application process, which can lead to secondary tape breakage. There is no risk of later detachment, which can improve production efficiency, reduce the time loss caused by manual tape splicing, and the thickness can be made thinner than normal tape, with better bonding effect.

[0008] As a further embodiment of this utility model: the painting device includes a hopper, one side of which is connected to a drive mechanism that can drive it to rise and fall, and a discharge trough is opened at the bottom facing the receiving area, and a discharge nozzle is provided at the discharge trough.

[0009] As a further embodiment of this utility model: an upper and lower slotted pressure cover is provided at the discharge trough, and an opening and closing regulating valve is provided at the slotted pressure cover.

[0010] As a further embodiment of this utility model, a throttling valve is provided at the discharge chute of the silo.

[0011] As a further embodiment of this invention: an electric cylinder capable of driving the discharge nozzle to move horizontally is connected to one side of the discharge nozzle.

[0012] As a further embodiment of this utility model: a spray material recovery interface is provided on one side of the hopper, and the spray material recovery interface is connected to a negative pressure pump through a recovery pipeline.

[0013] As a further embodiment of this utility model: the hopper has a cover-like structure and can cover the seams of the electrode rolls in the splicing area.

[0014] As a further embodiment of this utility model: the painting device evenly sprays paint onto the area 4cm to 6cm before and after the seam of the roll.

[0015] As a further embodiment of this invention, the drying range of the drying device covers the junction area.

[0016] As a further aspect of this utility model, the thickness of the seam of the electrode roll after being painted by the painting device is 0.09mm to 0.14mm.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This application uses a spray painting device to spray and wash the broken electrode roll seam, and then uses a drying device to bake and cure it. This can solve the problem of secondary tape breakage caused by tape falling off during the adhesive application process and uneven application. There is no risk of later detachment, which improves production efficiency, reduces the time loss caused by manual tape splicing, and the thickness can be thinner than normal tape, with better bonding effect. This application replaces the manual adhesive tape splicing process with UV printing technology. The painting device can cover the splicing area to prevent paint from leaking onto the normal electrode rolls and protect the positive and negative electrode rolls. After production, the residual spray material inside the device can be recycled and reused, reducing production costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a pole roll splicing device according to an embodiment of the present invention; Figure 2 This is a top view of a polar winding splicing device according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the painting device according to an embodiment of the present invention; Explanation of reference numerals in the attached figures: 1. Rear electrode roll after breakage; 2. Workbench; 3. Rear electrode roll pressing knife; 4. Painting device; 5. Front electrode roll pressing knife; 6. Rear electrode roll after breakage; 7. Drying device; 8. Electrode roll splicing seam; 41. Hopper; 42. Throttling valve; 43. Spray material recovery interface; 44. Discharge nozzle; 45. Opening and closing regulating valve; 46. Upper and lower slotted pressure cap. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Reference Figure 1 and Figure 2 An electrode roll splicing device includes a worktable 2, a rear electrode roll pressing knife 3, a painting device 4, a front electrode roll pressing knife 5, and a drying device 7, wherein the rear electrode roll pressing knife 3, the painting device 4, the front electrode roll pressing knife 5, and the drying device 7 are all installed above the worktable 2; the electrode roll can pass through the front electrode roll pressing knife 5, the painting device 4, the rear electrode roll pressing knife 3, and the drying device 7 in sequence under the action of an external drive; during this process, if the electrode roll breaks, a broken rear electrode roll 1 and a broken front electrode roll 6 are formed.

[0021] For ease of understanding and description, Figure 1 The direction from left to right in the center is the conveying direction of the polar roll; the other directions are deduced from this reference. This should be understood. Figure 1 The orientation settings (center, top, bottom, left, right) are for ease of description and understanding only and should not be construed as limitations on this application.

[0022] Reference Figure 1 The top of the workbench 2 is horizontal. The subsequent electrode rolls need to be transferred from the top of the workbench 2 and the tape is picked up here. Therefore, a tape picking area is set above the workbench 2. The rear electrode roll pressing knife 3, the painting device 4, the front electrode roll pressing knife 5, and the drying device 7 are all installed at the tape picking area.

[0023] Reference Figure 1 and Figure 2 The rear electrode roll pressing knife 3 and the front electrode roll pressing knife 5 can be adjusted by a linear cylinder, or they can be designed to rotate at one end and be installed on the worktable 2. When the electrode roll needs to be spliced, the rear electrode roll pressing knife 3 and the front electrode roll pressing knife 5 are used to press down the broken electrode rolls at both ends, i.e., the broken rear electrode roll 1 and the broken front electrode roll 6. After the electrode rolls are fixed, the splicing work is carried out.

[0024] Reference Figure 3 The painting device 4 includes a hopper 41, a throttle valve 42, a spray material recovery interface 43, a discharge nozzle 44, an opening and closing regulating valve 45, and upper and lower slotted covers 46. A drive mechanism capable of lifting and lowering the hopper 41 is connected to one side of the hopper 41. The drive mechanism can be a linear motor or a hydraulic cylinder, etc., and can be mounted on the workbench 2. The lifting and lowering of the hopper 41 is adjusted by the drive mechanism. A discharge trough is opened at the bottom of the hopper 41 facing the tape receiving area, and a discharge nozzle 44 is installed at the discharge trough. Upper and lower slotted covers 46 are installed at the discharge trough, and an opening and closing regulating valve 45 is installed at the slotted covers. The upper and lower slotted covers 46 are opened by adjusting the valve 45. The discharge nozzle 44 can be exposed. A throttle valve 42 is installed at the discharge trough of the hopper 41. The discharge nozzle 44 and the discharge trough can be connected by a hose. An electric cylinder that can move the discharge nozzle 44 horizontally is connected to one side of the discharge nozzle 44 so that the paint coming out of the discharge nozzle 44 can evenly cover the seam 8 of the electrode roll. A spray material recovery interface is opened on one side of the hopper 41. The spray material recovery interface is connected to a negative pressure pump through a recovery pipeline. The negative pressure pump can be used to recover the residual paint. It should be noted that the hopper 41 of this application has a cover-like structure, which can cover the seam 8 of the electrode roll to prevent the sprayed paint from exceeding the splicing area.

[0025] Reference Figure 3 The drying device 7 uses a UV baking lamp, which is installed diagonally above the tape-connecting area. The UV baking lamp can cover the entire tape-connecting area. The hopper 41 can be designed with a hollow top to ensure that the UV baking lamp can bake the tape seam 8.

[0026] The painting device 4 in this application not only serves as a tape splicer but also provides electrode roll protection, solving problems such as uneven tape application, weak adhesion, and long splicing time in the tape application process. Using UV printing technology, it essentially sprays a layer of UV paint at the electrode roll splice position (i.e., the electrode roll seam 8), forming a paint film for adhesion. A thickness of 0.09mm to 0.14mm can be achieved without occupying extra space. The equipment offers better leveling accuracy compared to manual methods, reducing stress-induced scrap dimensions of the front and rear electrode rolls; it also eliminates the problem of weak adhesion, with a peel force reaching 9-15 MPa, solving the problem of secondary tape breakage, reducing labor waste, and increasing production cycle time. The paint is essentially similar to car paint and wall paint, possessing a certain degree of adhesion. Such paints are widely available on the market and can be purchased from various platforms, for example, "UV insulating and anti-corrosion coating products from Matsui Group" and "PU paint products from Donglai Coating Technology Company."

[0027] A method for splicing tape in a polarity splicing device: Electrode roll splicing is generally used in the electrode roll cutting process; the electrode roll is transported to the upper part of the worktable and cut during the transport process. During the transport process, the tape may break. This application can be used to splice the tape before the cutting process. Specifically, before splicing the pole rolls, the broken front and rear pole rolls (i.e., the broken rear pole roll 1 and the broken front pole roll 6) are moved to the splicing area, and the contact points of the broken rear pole roll 1 and the broken front pole roll 6 are overlapped. The rear pole roll pressing knife 3 and the front pole roll pressing knife 5 are used to press down the broken rear pole roll 1 and the broken front pole roll 6 respectively. The painting device 4 is lowered, and the upper and lower slotted pressure cap 46 presses down on the position of the electrode roll joint 8 in the splicing area. Then, the material hopper 41 is opened through the throttle valve 42, and the paint is sprayed out from the discharge nozzle 44 and applied to the position of the electrode roll joint 8. It should be noted that the paint can be evenly sprayed in an area of ​​4cm to 6cm before and after the electrode roll joint 8. Due to the action of the pressure cap, the paint is prevented from going beyond the splicing area. After the paint is sprayed, the thickness at the electrode roll joint is 0.09mm to 0.14mm. After printing, the drying device bakes and cures the printed surface for 3 to 5 seconds. After baking, the electrode roll splicing is completed. The electrode roll after splicing continues to the cutting process, and the electrode roll containing the paint is taken out after cutting. The normally cut electrode roll can be transferred to the next process. After the production process is completed, the residual spray material inside the device can be recycled and reused.

[0028] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tape splicing device, comprising a worktable, characterized in that, The workbench is provided with a tape receiving area, and a painting device is provided at the tape receiving area on the workbench. The painting device is connected to a drive mechanism. Extreme roll pressing knives are provided above the workbench and on both sides of the painting device. A drying device that can cover the tape receiving area is provided above the workbench.

2. The electrode winding splicing device according to claim 1, characterized in that: The painting device includes a hopper, one side of which is connected to a drive mechanism that can drive it to rise and fall, and a discharge trough is opened at the bottom facing the receiving area, with a discharge nozzle provided at the discharge trough.

3. The electrode winding splicing device according to claim 2, characterized in that: The discharge chute is equipped with upper and lower slotted covers, and an opening and closing regulating valve is installed at the slotted covers.

4. The electrode winding splicing device according to claim 2, characterized in that: A throttling valve is installed at the discharge chute of the silo.

5. The electrode winding splicing device according to claim 2, characterized in that: One side of the discharge nozzle is connected to an electric cylinder that can drive it to move horizontally.

6. The electrode winding splicing device according to claim 2, characterized in that: A spray material recovery interface is provided on one side of the hopper, and the spray material recovery interface is connected to a negative pressure pump through a recovery pipeline.

7. The electrode winding splicing device according to claim 2, characterized in that: The hopper has a cover-like structure and can cover the seams of the electrode rolls in the splicing area.

8. The electrode winding splicing device according to claim 7, characterized in that: The painting device evenly sprays paint onto the area 4cm to 6cm before and after the seam of the pole rolls.

9. The electrode winding splicing device according to claim 7, characterized in that: The drying range of the drying device covers the junction area.

10. The electrode winding splicing device according to claim 7, characterized in that: The thickness of the seam of the electrode roll after being painted by the painting device is 0.09mm to 0.14mm.

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