Adjustable inflation flattening roller of coating machine

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to an adjustable inflatable flattening roller of a coating machine, which comprises a Z-axis manual adjusting wheel, a fixed base, an inflatable soft wheel and a main shaft, the inflatable soft wheel is fixed on the main shaft, two ends of the main shaft are connected with the fixed base through bearings, the fixed base is arranged in the frame and is in sliding fit with the frame, the Z-axis manual adjusting wheel is connected with the adjusting shaft, and the adjusting shaft penetrates through the frame and is connected with the upper part of the fixed base. Wrinkles of the pole piece are adjusted through the inflatable soft wheel, so that wrinkles and bulking of the pole piece are effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium - ion batteries, and particularly relates to an adjustable inflation flattening roller for a coater. Background Technique

[0002] In the process of battery production, a coater is a device for applying a specific slurry on a foil. The foil needs to be released from the unwinding unit at the speed set by the coating process, and successively pass through front - side coating, a first oven, back - side coating, a second oven, a traction unit, etc., and finally be wound into a pole piece roll with a flat surface and aligned ends at the winding unit. In the above - mentioned production process, the foil will pass through multiple rollers such as guide rollers, traction rollers, coating rollers, oven support rollers, tension rollers, deviation - correcting rollers, and flattening rollers. In the actual production process, affected by factors such as the difference in the positions of various types of rollers of the equipment relative to the horizontal plane, the temperature and air volume of the oven, and the quality of the foil itself, the coating on the winding roller is prone to uneven tightness, poor coating flatness, and easy to produce wrinkles.

[0003] During operation, due to the action of tension, there may be obvious corrugations on the surface of the pole piece, that is, the tangent line on the surface of the pole piece is not a straight line but an irregular curve, resulting in a longitudinal gap between the pole piece and the roller, making the stress at each point on its surface very uneven, and the flatness of the strip surface is very poor. In subsequent processes, bulging and wrinkling phenomena may occur, thus making the product not meet the requirements.

[0004] At the same time, due to the longitudinal gap between the pole piece and the roller, it is very easy to move sideways during coiling, resulting in defects such as end - face layer faults and tower - shaped defects, which are difficult to meet the use requirements.

[0005] Foil wrinkles will cause poor coating appearance, and in severe cases, the tape will break. Adjusting the foil wrinkles will waste a large amount of foil and time, affect production efficiency, and waste a large amount of materials. To solve such problems, generally, it is solved by adjusting the position of the roller or changing the form of the roller surface texture.

[0006] Chinese Patent discloses a flattening mechanism at the outlet of a coater, application number: 2022225401701. This mechanism combines an eight - shaped threaded roller and an active arc - shaped flattening roller, effectively solving problems such as film wrinkling caused by the action of film stress during the coating process of the coater, or wrinkling and bulging edges caused by the influence of oven temperature, thereby reducing a large amount of waste of raw materials and improving productivity. For the flattening mechanism at the outlet of the coater of the utility model, the active arc - shaped flattening roller uses a servo - motor drive mode and an elastic synchronous - belt drive, and can make corresponding speed adjustments for different substrate film characteristics to keep the film flat uniformly. However, it cannot perform local precise adjustment.

[0007] In addition, a Chinese patent also discloses a flattening roll tooling and a coating machine, with the application number 2023227305811. The flattening roll tooling includes a flattening roll and a leveling mechanism; at least one end of the flattening roll is provided with the leveling mechanism; the leveling mechanism includes an adjusting part and a transmission component, the end of the flattening roll is rotatably installed on the transmission component, and the adjusting part is connected to the transmission component to drive the end of the flattening roll to reciprocate in the height direction. The flattening roll tooling provided in this application adjusts the height position of the end of the flattening roll by setting the leveling mechanism, and then adjusts the stress state of the foil between the flattening roll and its adjacent rolls, thereby optimizing the wrinkle removal effect. However, it cannot be precisely adjusted, and hard materials are likely to cause damage to the electrode sheet.

[0008] Therefore, there is currently no method that can precisely adjust the stress of the local electrode sheet and is not likely to cause damage to the electrode sheet. Summary of the Invention

[0009] The purpose of the present invention is to provide an adjustable inflatable flattening roll for a coating machine to solve the technical problems existing in the prior art.

[0010] To achieve the above purpose, the present invention provides the following technical solution: An adjustable inflatable flattening roll for a coating machine includes a Z-axis manual adjustment wheel, a fixed base, an inflatable soft wheel, and a main shaft; the inflatable soft wheel is fixed on the main shaft, both ends of the main shaft are connected to the fixed base through bearings, the fixed base is inside the frame and is slidably matched with it, the Z-axis manual adjustment wheel is connected to an adjustment shaft, and the adjustment shaft passes through the frame and is connected to the upper part of the fixed base.

[0011] Preferably, it further includes an X-axis adjustment device, and the X-axis adjustment device uses an X-axis moving module, and the moving end of the X-axis moving module is fixedly connected to the frame.

[0012] Preferably, the X-axis moving module and the Z-axis manual adjustment wheel are respectively located on both sides of the frame.

[0013] Preferably, the main shaft includes a connection end head, a soft wheel sleeve, a shaft sleeve, and positioning strips. Four positioning grooves are provided on the circumferential edge of the shaft sleeve along the axis direction of the shaft sleeve. Four positioning strips are divided into two groups and are respectively fixed on arc-shaped plates. The arc-shaped plates together with the positioning strips are installed inside the shaft sleeve, and the positioning strips extend out from the positioning groove positions. The soft wheel sleeve is sleeved outside the shaft sleeve, and the positioning strips are in close fit with the inner wall of the soft wheel sleeve. The connection end heads are threadedly connected to both ends of the shaft sleeve, and the connection end heads support the arc-shaped plates apart.

[0014] Preferably, the outer end of the connection end head is connected to a bearing seat through a bearing, and the bearing seat is fixed to the side part of the fixed base.

[0015] The beneficial effects of the present utility model are as follows: 1. By adjusting the wrinkles of the electrode sheet with the inflatable soft wheels, the wrinkles and bulges of the electrode sheet can be effectively reduced;

[0016] 2. It can be flexibly adjusted and can be adjusted simultaneously on the X, Y, and Z axes;

[0017] 3. Currently, all flattening rollers can only be adjusted as a whole, while this patent can adjust the local electrode sheet. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of Embodiment 1 in the present utility model;

[0019] Figure 2 It is an exploded view of Embodiment 1 in the present utility model;

[0020] Figure 3 It is a perspective view of Embodiment 2 in the present utility model. Detailed Description of the Specific Embodiment

[0021] The following will describe in detail the specific embodiment of the present utility model in conjunction with the drawings and the preferred embodiments. Embodiment

[0022] As Figure 1 shown, an adjustable inflatable flattening roller for a coater mainly consists of four mechanisms: a Z-axis manual adjustment wheel 100, a fixed base 200, an inflatable soft wheel 300, and a main shaft 400.

[0023] The Z-axis manual adjustment wheel 100 completes the movement of the fixed base 200 on the Z-axis through manual adjustment.

[0024] The fixed base 200 plays a role in main body support and fixation and is connected to the main shaft 400.

[0025] The inflatable soft wheels 300 (8 in the figure), which are the core components. The air inlet pipes for inflating the soft wheels are not shown in the figure, and there is no limitation on the method. The size of the soft wheels is defined according to the foil material and the gap requirement with the lower roller. Materials with soft texture and not easy to damage the electrode sheet need to be selected, and preferably soft rubber. Each soft wheel can be inflated and deflated independently, and the flattening of specific parts can be completed by only inflating and deflating some of the soft wheels.

[0026] The main shaft 400 is connected to the fixed base 200 on the one hand and plays a role in supporting the inflatable soft wheels 300 on the other hand.

[0027] It should be noted that the combination method of the internal components of the main shaft 400 in the exploded view, the method of fixing the soft wheel, and the method of tightening common components with components such as screws, bearings, and gaskets are all prior arts. Common replacements can be made when the purpose of the components can be achieved. Specifically, in this embodiment, the main shaft 400 includes a connecting end 401, a soft wheel sleeve 402, a bushing 403, and a positioning strip 404. Four positioning grooves 405 are provided on the circumferential edge of the bushing along the axis direction of the bushing. The four positioning strips are divided into two groups and are respectively fixed on the arc-shaped plate 406. The arc-shaped plate together with the positioning strips is inserted into the interior of the bushing, and the positioning strips extend out from the positioning groove positions. The soft wheel sleeve is sleeved outside the bushing, and the positioning strips are in close fit with the inner wall of the soft wheel sleeve. The connecting ends are threadedly connected to both ends of the bushing, and the connecting ends support the arc-shaped plate. Specifically, when the connecting ends are tightened, the ends of the connecting ends support the arc-shaped plate, so that the arc-shaped plate is closely attached to the inner wall of the bushing, and the positioning strips extend out from the positioning groove positions. The positioning strips support the soft wheel sleeve and fasten it to the bushing. Embodiment

[0028] It mainly consists of five mechanisms: the Z-axis manual adjustment wheel 100, the fixed base 200, the inflatable soft wheel 300, the main shaft 400, and the X-axis adjustment device 500.

[0029] The rest of the mechanisms have been described in Embodiment 1 and will not be elaborated here.

[0030] The X-axis adjustment device 500 consists of two parts: a servo motor and a slide rail. The sliding position of the 200 in the X-axis direction is controlled by the servo motor. It can also be controlled in a non-servo motor manner.

[0031] It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable pneumatic flattening roller for a coating machine, characterized in that: It includes a Z-axis manual adjustment wheel, a fixed base, an inflatable soft wheel and a main shaft; the inflatable soft wheel is fixed on the main shaft, both ends of the main shaft are connected to the fixed base through bearings, the fixed base is in a frame and slidably cooperates with the frame, the Z-axis manual adjustment wheel is connected to the adjustment shaft, and the adjustment shaft passes through the frame and is connected to the upper part of the fixed base.

2. The adjustable pneumatic flattening roller of the coating machine according to claim 1, characterized in that: It also includes an X-axis adjustment device, which adopts an X-axis moving module, and the moving end of the X-axis moving module is fixedly connected to the frame.

3. The adjustable pneumatic flattening roller of the coating machine according to claim 2, characterized in that: The X-axis moving module and the Z-axis manual adjusting wheel are respectively located on two sides of the frame.

4. The adjustable pneumatic flattening roller of the coating machine according to claim 1, characterized in that: The main shaft includes a connecting end, a soft wheel sleeve, a shaft sleeve and a positioning strip. The shaft sleeve is provided with four positioning grooves along the circumference of the shaft sleeve in the axial direction. The four positioning strips are divided into two groups and are respectively fixed on the arc plate. The arc plate and the positioning strips are installed into the shaft sleeve. The positioning strips extend from the positioning grooves. The soft wheel sleeve is sleeved on the outside of the shaft sleeve. The positioning strips are tightly matched with the inner wall of the soft wheel sleeve. The connecting end is threadedly connected to the two ends of the shaft sleeve, and the connecting end supports the arc plate.

5. The adjustable pneumatic flattening roller of the coating machine according to claim 4, characterized in that: The outer end of the connecting end is connected to the bearing seat through a bearing, and the bearing seat is fixedly connected to the side of the fixed base.

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