Battery cell coating method and battery cell

Abstract

This invention provides a battery cell coating method and a battery cell, comprising the following steps: a scanning device scans the battery cell to obtain a plurality of scanning data; if the battery cell is determined to meet the coating standard, the bottom of the battery cell is pre-coated; a main controller acquires the scanning data and compares the scanning data with the standard thickness range of the battery cell; when the scanning data is within the standard thickness range of the battery cell, the battery cell is pre-coated; the main controller controls the first coating mechanism and the second coating mechanism to move to adjust the size of the gap so that the insulating film is attached to the battery cell; in this application, the battery cell coating method and the battery cell scan the large surface of the battery cell to obtain a series of data, so that the battery cells with abnormal large surface thickness can be screened in advance according to the scanning data, and the battery cells that exceed the set range are rejected, reducing rework caused by coating abnormalities.

Description

Technical Field

[0001] This invention relates to the field of battery equipment technology, and in particular to a cell coating method and a cell. Background Technology

[0002] The common method for coating square batteries is as follows: (1) Set the distance between the upper coating mechanism and the lower coating mechanism according to the standard thickness of the battery cell; (2) The film pulling mechanism pulls the film according to the preset value; (3) The battery cell pusher pushes the battery cell to the pre-coating position, and the bottom of the battery cell is pre-coated; (4) The upper coating mechanism and the lower coating mechanism move to the set position respectively, and the coating pusher pushes the battery cell through the upper coating mechanism and the lower coating mechanism. The coating rollers of the upper coating mechanism and the lower coating mechanism apply the insulating film to the large surface of the battery cell. During this process, the positions of the upper coating mechanism and the lower coating mechanism remain unchanged; (5) Cut the protective film; (6) Cut the bottom of the protective film; (7) Coat the sides of the battery cell; (8) Hot stamping and shaping; (9) Hot stamping and shaping; (10) The battery cell coating is completed and the material is unloaded. However, since the size of the square battery cell is relatively large, the two large surfaces of the battery cell are prone to slight deformation during the manufacturing process, such as bulging or denting. Furthermore, the distance between the upper and lower coating mechanisms is set according to the standard cell thickness. During the coating process, this distance remains constant relative to the cell, meaning there is no positional change. Specifically, during coating, there is excessive contact with bulging areas and insufficient contact with recessed areas. This leads to excessive or insufficient pressure between the deformed cell's large surface and the coating rollers of the upper and lower coating mechanisms, resulting in poor coating conditions such as wrinkles and bubbles. To address these issues, this invention proposes a cell coating method and a cell. Summary of the Invention

[0003] The purpose of this invention is to provide a battery cell coating method and a battery cell, so that during the battery cell coating process, the first coating mechanism and the second coating mechanism are consistent with the thickness of the battery cell, so that the pressure on the battery cell is constant, avoiding coating defects such as wrinkles and bubbles during the coating process, and improving the coating pass rate.

[0004] To achieve the above objectives, the present invention provides a method for coating a battery cell, comprising the following steps:

[0005] The scanning device scans the battery cell to obtain several scan data points;

[0006] The main controller acquires the scan data and compares the scan data with the standard thickness range of the battery cell;

[0007] When the scanned data is within the standard thickness range of the battery cell, the battery cell is pre-coated.

[0008] The coating push rod drives the battery cell through the gap between the first coating mechanism and the second coating mechanism. When the battery cell passes through the gap, the main controller controls the first coating mechanism and the second coating mechanism to move to adjust the size of the gap to be consistent with the thickness of the battery cell, so that the battery cell completes the coating under constant pressure.

[0009] Optionally, if the scan data is outside the standard thickness range of the battery cell, the abnormal battery cell is rejected.

[0010] Optionally, the pre-coating step of the battery cell is as follows:

[0011] The film-pulling mechanism pulls the insulating film to the pre-wrapping position for film application;

[0012] The cell push rod drives the cell to move to the pre-coating position after the film is stretched, so that the cell completes the pre-coating.

[0013] Optionally, both the first coating mechanism and the second coating mechanism include a coating roller and a servo motor, and both the coating roller and the servo motor are electrically connected to the main controller, with the coating roller being drive-connected to the servo motor;

[0014] When the battery cell passes through the gap, the coating rollers of both the first coating mechanism and the second coating mechanism are in a compressed state.

[0015] Optionally, the compression of the coating roller is 0 to 1 mm.

[0016] Optionally, the distance between the coating roller of the first coating mechanism and the battery cell is adjusted by a servo motor of the first coating mechanism, as follows:

[0017] When the coating roller of the first coating mechanism separates from the battery cell, or when the compression is less than 0.5 mm or greater than 0.5 mm, the main controller starts the servo motor.

[0018] The servo motor drives the coating roller of the first coating mechanism to move, so that the coating roller of the first coating mechanism and the battery cell are in a compressed state, and the compression amount of the coating roller of the first coating mechanism is 0.5mm.

[0019] Optionally, the distance between the coating roller of the second coating mechanism and the battery cell is adjusted by a servo motor of the second coating mechanism, as follows:

[0020] When the coating roller of the second coating mechanism separates from the battery cell, or when the compression is less than 0.5 mm or greater than 0.5 mm, the main controller starts the servo motor.

[0021] The servo motor drives the coating roller of the second coating mechanism to move, so that the coating roller of the second coating mechanism and the battery cell are in a compressed state, and the compression amount of the coating roller of the second coating mechanism is 0.5mm.

[0022] Optionally, the scanning device is a laser sensor or an optical sensor.

[0023] Optionally, a battery cell is coated using the aforementioned battery cell coating method.

[0024] Beneficial effects:

[0025] The present application describes a cell coating method and a method for scanning the large surface area of ​​the cell to obtain a series of data. This allows for the early screening of cells with abnormal large surface thickness based on the scanning data. Specifically, cells that exceed the set range are rejected as non-compliant, reducing rework caused by coating abnormalities.

[0026] This application describes a cell coating method and a method for scanning the large-area contour of the cell using a scanning device to output the large-area thickness variation curve data of the cell. This data is then associated with the servo motors of the first coating mechanism and the second coating mechanism. When the cell is being coated, the distance between the coating rollers of the first coating mechanism and the second coating mechanism is dynamically adjusted according to the large-area thickness variation curve data of the cell. The distance between the coating rollers of the first coating mechanism and the second coating mechanism is always consistent with the large-area thickness of the cell, which greatly improves the coating pass rate. Attached Figure Description

[0027] Figure 1 This is a flowchart of the cell coating process of the present invention;

[0028] Figure 2 This is a statistical table listing the distances between the battery cell scanning data and the first and second coating rollers according to the present invention.

[0029] Figure 3 This is a flowchart of the pre-coating process for the battery cell of the present invention;

[0030] Figure 4 This is a flowchart illustrating the adjustment of the distance between the first coating mechanism and the battery cell according to the present invention.

[0031] Figure 5 This is a flowchart illustrating the adjustment of the distance between the second coating mechanism and the battery cell according to the present invention.

[0032] Figure 6 This is a flowchart of the entire battery cell coating system of the present invention. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by those skilled in the art. The terms "comprising" and similar expressions used herein mean that the element or object preceding the word covers the element or object listed following the word and its equivalents, but do not exclude other elements or objects.

[0034] To address the problems existing in the prior art, embodiments of the present invention provide a cell coating method, see below. Figure 1 As shown, it includes the following steps:

[0035] S01: The scanning device scans the battery cell to obtain several scan data.

[0036] See Figure 1 and Figure 2 As shown, regular battery cells are either round or square. Both types of cells have sides and two large surfaces (top and bottom). In actual use, the large surfaces and sides of the cell need to be coated with a film, and the cell moves horizontally at a uniform speed along the coating direction during coating. In this embodiment, the scanning device scans the large surfaces of the cell along the coating direction to obtain several scan data points. This allows for better and more accurate control over the specific quality of the battery cell.

[0037] Furthermore, when scanning the battery cell, the scanning device can perform discontinuous regular scanning (i.e., there is a certain interval between two adjacent scan positions, and the distance between the two adjacent scan positions is the same), discontinuous irregular scanning (i.e., there is a certain interval between two adjacent scan positions, and the distance between the two adjacent scan positions is not the same), and irregular scanning (i.e., the scanning device arbitrarily selects the scan positions on the large surface of the battery cell). By using multiple scanning methods, the accuracy of the battery cell scanning data can be improved, and it can also be applied to scanning different models of battery cells.

[0038] S02: The main controller acquires the scan data and compares the scan data with the standard thickness range of the battery cell.

[0039] The standard thickness range of the battery cell is 71.80 ± 0.30 mm. The quality of the battery cell is monitored, specifically whether any bulges or dents present during the production process are within the standard thickness range. Screening is performed on the battery cells before coating to avoid rework, which leads to low production efficiency and wasted effort.

[0040] S03: When the scan data is within the standard thickness range of the battery cell, the battery cell is pre-coated.

[0041] When the scan data is outside the standard thickness range of the battery cell, the abnormal battery cell is rejected.

[0042] See Figure 1 and Figure 2 As shown, several scan data points are compared with the standard thickness range of the battery cell. When the scan data is outside the standard thickness range, the abnormal battery cell is rejected. For example, if the scan data is outside the range of 71.80 ± 0.30 mm, the battery cell is considered to have a large unevenness and is not suitable for subsequent coating, and needs to be removed. When it is within the standard thickness range, the battery cell is pre-coated. Pre-coating is performed separately for the bottom and top of the battery cell. For example, in this embodiment, there are ten scan data points: 71.75, 71.82, 71.82, 71.90, 71.93, 71.99, 71.95, 71.88, 71.80, and 71.75 mm. Since all ten data points are within the standard thickness range of the battery cell, the battery cell can be considered to be of good quality and suitable for the pre-coating process.

[0043] See Figure 3 As shown, the pre-coating step of the battery cell is as follows:

[0044] S031: The film-pulling mechanism pulls the insulating film to the pre-wrapping position for film laying.

[0045] Specifically, after the battery cell meets the coating standard, the main controller drives the film-pulling mechanism to move, and the film-pulling mechanism pulls the insulating film to lay the film at the pre-coating position.

[0046] S032: The cell push rod drives the cell to move to the pre-coating position after the film is stretched, so that the cell completes the pre-coating.

[0047] As described above, when it is determined that the battery cell can be subsequently coated, the film-pulling mechanism pulls the film at the pre-coating position according to a preset value. For example, if the coating length of the battery cell is 490mm, then the pulling length is at least 490mm. After the film is pulled at the pre-coating position, the battery cell pusher pushes the battery cell to the pre-coating position for pre-coating. This embodiment can reduce the rework rate of the equipment. Specifically, after comparing the scanned data with the standard thickness range of the battery cell, and determining that the battery cell can be coated, the film-pulling mechanism will pull the film at the pre-coating position, and the battery cell pusher will push the battery cell to the pre-coating position. This process operation based on instructions ensures operational accuracy and improves coating efficiency.

[0048] S04: The coating push rod drives the battery cell through the gap between the first coating mechanism and the second coating mechanism. When the battery cell passes through the gap, the main controller controls the first coating mechanism and the second coating mechanism to move to adjust the size of the gap to be consistent with the thickness of the battery cell, so that the battery cell completes the coating under constant pressure.

[0049] See again Figure 2 As shown, after the battery cell completes its pre-coating, the main controller activates the coating pusher. The pusher propels the battery cell (after pre-coating) along the coating direction, passing through the gap between the first and second coating mechanisms. While passing through this gap, the main controller controls the movement of both the first and second coating mechanisms to adjust the size of the gap, ensuring the insulating film adheres to the battery cell. Furthermore, the adjusted gap size always maintains consistency with the battery cell's thickness. For example, if several scan data points are 71.75mm, 71.82mm, 71.82mm, 71.90mm, 71.93mm, 71.99mm, 71.95mm, 71.88mm, 71.80mm, and 71.75mm respectively, then the gap size data needs to be adjusted to 70.75mm, 70.82mm, 70.82mm, 70.90mm, 70.93mm, 70.99mm, 70.95mm, 70.88mm, 70.80mm, and 70.75mm respectively. In specific implementation, the scan data and the gap size data correspond one-to-one from left to right, and the difference between the two is kept at 1mm.

[0050] Both the first coating mechanism and the second coating mechanism include a coating roller and a servo motor, and both the coating roller and the servo motor are electrically connected to the main controller. The coating roller is drive-connected to the servo motor. When the battery cell passes through the gap, the coating rollers of both the first coating mechanism and the second coating mechanism are in a compressed state.

[0051] The compression amount of the coating roller is 0 to 1 mm. In one embodiment, preferably, the compression amount of the coating roller is 0.5 mm. In this case, after the coating rollers of the first coating mechanism and the second coating mechanism are adjusted, the compression amount of a single coating roller is 0.5 mm, and the sum of the compression amounts of the two coating rollers is 1 mm.

[0052] In specific implementation, when the coating pusher pushes the battery cell through the gap at a constant speed, the size of the gap is adjusted to 70.75, 70.82, 70.82, 70.90, 70.93, 70.99, 70.95, 70.88, 70.80, and 70.75 mm respectively, to match the scanning data 71.75, 71.82, 71.82, 71.90, 71.93, 71.99, 71.95, 71.88, 71.80, and 71.75 mm.

[0053] As another implementation, preferably, the compression amount of the coating roller is 1mm. In this case, the coating roller of the first coating mechanism or the coating roller of the second coating mechanism can be adjusted, and the other one does not need to be adjusted, so as to facilitate adjustment or increase the diversity of adjustment methods, and ensure that the compression amount of the coating roller is 1mm.

[0054] In this embodiment, see Figure 4 The adjustment of the first coating mechanism is described below:

[0055] The distance between the coating roller of the first coating mechanism and the battery cell is adjusted by the servo motor of the first coating mechanism, as follows:

[0056] S05: When the coating roller of the first coating mechanism separates from the battery cell or the compression amount is less than 0.5mm or greater than 0.5mm, the main controller starts the servo motor.

[0057] S06: The servo motor drives the coating roller of the first coating mechanism to move, so that the coating roller of the first coating mechanism and the battery cell are in a compressed state, and the compression amount of the coating roller of the first coating mechanism is 0.5mm.

[0058] In this embodiment, the compression amount of the coating roller is selected to be 0.5 mm. Specifically, the first coating mechanism is located above the battery cell. During the adjustment of the first coating mechanism, the battery cell moves along the coating direction. When the bulge on the battery cell contacts the coating roller of the first coating mechanism, the compression amount of the coating roller of the first coating mechanism is greater than 0.5 mm. At this time, the servo motor of the first coating mechanism drives the coating roller of the first coating mechanism to move upward, so that the compression amount of the coating roller of the first coating mechanism decreases to 0.5 mm. When the recessed part of the battery cell contacts the coating roller of the first coating mechanism, the compression amount of the coating roller of the first coating mechanism is less than 0.5 mm or it separates from the battery cell. At this time, the servo motor of the first coating mechanism drives the coating roller of the first coating mechanism to move downward, so that the compression amount of the coating roller of the first coating mechanism increases to 0.5 mm.

[0059] This embodiment specifically provides a process for coating the bottom of the battery cell:

[0060] The film-pulling mechanism pulls the insulating film to the pre-coating position for film application; the cell pusher drives the cell to move to the pre-coating position after film pulling, so that the cell completes the pre-coating.

[0061] The coating pusher drives the battery cell through the gap between the first coating mechanism and the second coating mechanism. During the process of the battery cell passing through the gap, the bulges or depressions on the battery cell will abut or separate from the coating rollers of the first coating mechanism and the second coating mechanism (the main controller has pre-set the compression amount of the coating rollers to 0.5mm). When the battery cell passes through the gap, the main controller controls the servo motors of the first coating mechanism and the second coating mechanism, and controls the coating rollers of the first coating mechanism and the second coating mechanism through the servo motors to play an adjustment role. Specifically, the compression amount of the coating rollers of the first coating mechanism and the second coating mechanism is adjusted to 0.5mm to match the current thickness of the battery cell, thereby ensuring that the battery cell can pass through the gap exactly and keeping the squeezing force between the coating rollers of the first coating mechanism and the battery cell constant.

[0062] In this embodiment, see Figure 5 The adjustment of the second coating mechanism is described below:

[0063] The distance between the coating roller of the second coating mechanism and the battery cell is adjusted by the servo motor of the second coating mechanism, as follows:

[0064] S07: When the coating roller of the second coating mechanism separates from the battery cell or the compression amount is less than 0.5mm or greater than 0.5mm, the main controller starts the servo motor.

[0065] S08: The servo motor drives the coating roller of the second coating mechanism to move, so that the coating roller of the second coating mechanism and the battery cell are in a compressed state, and the compression amount of the coating roller of the second coating mechanism is 0.5mm.

[0066] In this embodiment, the compression amount of the coating roller is selected to be 0.5mm. Specifically, the second coating mechanism is located above the battery cell. During the adjustment of the second coating mechanism, the battery cell moves along the coating direction. When the bulge on the battery cell contacts the coating roller of the second coating mechanism, the compression amount of the coating roller of the second coating mechanism is greater than 0.5mm. At this time, the servo motor of the second coating mechanism drives the coating roller of the second coating mechanism to move downward, so that the compression amount of the coating roller of the second coating mechanism is reduced to 0.5mm. When the recessed part of the battery cell contacts the coating roller of the second coating mechanism, the compression amount of the coating roller of the second coating mechanism is less than 0.5mm or it separates from the battery cell. At this time, the servo motor of the second coating mechanism drives the coating roller of the second coating mechanism to move upward, so that the compression amount of the coating roller of the second coating mechanism is increased to 0.5mm. Both the servo motors of the first and second coating mechanisms are controlled by the main controller.

[0067] In another embodiment, the compression amount of the coating roller is selected to be 1mm. In this case, the distance between the coating roller of the first coating mechanism or the coating roller of the second coating mechanism and the battery cell can be adjusted according to the bulging and depression of the battery cell. The principle is the same as that of the compression amount of the coating roller being 0.5mm, and will not be repeated here.

[0068] In this embodiment, during the cell coating process, the general order is to first coat the bottom of the cell, then coat the sides, and finally coat the top. After the bottom coating is completed, the sides and top still require coating. (See [reference needed]). Figure 6 As shown, the cell coating method further includes the following steps:

[0069] After the bottom of the battery cell is coated, the main controller controls the cutting mechanism to cut the insulating film.

[0070] The cutting mechanism makes a cut in the insulating film covering the battery cell;

[0071] After the insulating film is cut, the sides and top of the battery cell are wrapped with film in sequence.

[0072] After the bottom, sides and top of the battery cell are coated, the battery cell is shaped by hot stamping and then unloaded.

[0073] As can be seen from the above, the optimization of the battery cell coating method lies in the scanning of the large surface of the battery cell, as well as the optimization of the structure of the first coating mechanism and the second coating mechanism. Other components have not been adjusted. This local optimization can reduce the processing difficulty and production cost. At the same time, through local optimization, it can effectively avoid the existing deformed battery cell large surface and the coating rollers of the first coating mechanism and the second coating mechanism having excessive or insufficient pressure, which can easily cause coating defects such as wrinkles and bubbles. This greatly increases the economic value and is more in line with market demand.

[0074] In this embodiment, the scanning device is a laser sensor or an optical sensor.

[0075] When scanning the large surface of the battery cell, either the laser sensor or the optical sensor can be used. Those skilled in the art can choose the specific sensor based on the actual application scenario.

[0076] In this embodiment, please continue to refer to Figure 6 As shown, before the large-area pre-coating of the battery cell, the battery cell and the insulating film need to be pre-treated. The steps are as follows:

[0077] Before performing a large-area scan of the battery cell, the surface of the battery cell needs to be cleaned.

[0078] Before the film-pulling mechanism pulls the insulating film toward the pre-wrapping position, the insulating film needs to undergo an anti-static process.

[0079] As can be seen from the above, before the film-stretching mechanism performs the film-stretching process, the following operations are also performed: specifically, the insulating film is laid and the insulating film is destaticated; before the large-area scanning of the battery cell, it is necessary to remove the residue on the battery cell and clean the battery cell to prevent the dust deposited on the battery cell from affecting the subsequent scanning. The cleaning of the battery cell can be achieved by means of brush, air knife, negative pressure dust suction, etc.

[0080] This application also provides a battery cell, wherein the battery cell is coated using the battery cell coating method described above.

[0081] The present application describes a cell coating method and a method for scanning the large surface area of ​​the cell to obtain a series of data. This allows for the early screening of cells with abnormal large surface thickness based on the scanning data. Specifically, cells that exceed the set range are rejected as non-compliant, reducing rework caused by coating abnormalities.

[0082] This application describes a cell coating method and a method for scanning the large-area contour of the cell using a scanning device to output the large-area thickness variation curve data of the cell. This data is then associated with the servo motors of the first coating mechanism and the second coating mechanism. When the cell is being coated, the distance between the coating rollers of the first coating mechanism and the second coating mechanism is dynamically adjusted according to the large-area thickness variation curve data of the cell. The distance between the coating rollers of the first coating mechanism and the second coating mechanism is always consistent with the large-area thickness of the cell, which greatly improves the coating pass rate.

[0083] While embodiments of the present invention have been described in detail above, it will be apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations fall within the scope and spirit of the invention as set forth in the claims. Furthermore, the invention described herein may have other embodiments and can be implemented or carried out in various ways.

Claims

1. A method for coating a battery cell, characterized in that, Includes the following steps: The scanning device scans the battery cell to obtain several scan data. The scanning device scans the large surface of the battery cell along the coating direction. When scanning the battery cell, the scanning device adopts discontinuous regular scanning, discontinuous irregular scanning, and irregular scanning. The main controller acquires the plurality of scan data and compares them with the standard thickness range of the battery cell. When all of the scan data are within the standard thickness range of the battery cell, the battery cell is pre-coated; when one of the scan data is outside the standard thickness range of the battery cell, the abnormal battery cell is discharged. The pre-coating process for the battery cell is as follows: The film-pulling mechanism pulls the insulating film to the pre-wrapping position for film application; The cell push rod drives the cell to move to the pre-coating position after the film is stretched, so that the cell completes the pre-coating; The coating pusher drives the battery cell to move along the coating direction and pass through the gap between the first coating mechanism and the second coating mechanism. When the battery cell passes through the gap, the main controller controls the first coating mechanism and the second coating mechanism to move respectively, so as to adjust the size of the gap to be consistent with the thickness of the battery cell, so that the battery cell completes the coating under constant pressure; the plurality of scanning data corresponds one-to-one with the size data of the gap, and the difference between the plurality of scanning data and the size of the gap is 1 mm; Both the first coating mechanism and the second coating mechanism include a coating roller and a servo motor, and both the coating roller and the servo motor are electrically connected to the main controller, and the coating roller is drivenly connected to the servo motor; When the battery cell passes through the gap, the coating rollers of both the first coating mechanism and the second coating mechanism are in a compressed state; The scanning device scans the large-area contour of the battery cell, outputs the large-area thickness variation curve data of the battery cell, and associates the variation curve data with the servo motors of the first coating mechanism and the second coating mechanism. When the battery cell is coated, the distance between the coating rollers of the first coating mechanism and the second coating mechanism is dynamically adjusted according to the large-area thickness variation curve data of the battery cell. The distance between the coating rollers of the first coating mechanism and the second coating mechanism is always consistent with the large-area thickness of the battery cell.

2. The cell coating method according to claim 1, characterized in that, The compression of the coating roller is 0 to 1 mm.

3. The cell coating method according to claim 1, characterized in that, The distance between the coating roller of the first coating mechanism and the battery cell is adjusted by the servo motor of the first coating mechanism, as follows: When the coating roller of the first coating mechanism separates from the battery cell, or when the compression is less than 0.5 mm or greater than 0.5 mm, the main controller starts the servo motor. The servo motor drives the coating roller of the first coating mechanism to move, so that the coating roller of the first coating mechanism and the battery cell are in a compressed state, and the compression amount of the coating roller of the first coating mechanism is 0.5mm.

4. The cell coating method according to claim 1, characterized in that, The distance between the coating roller of the second coating mechanism and the battery cell is adjusted by the servo motor of the second coating mechanism, as follows: When the coating roller of the second coating mechanism separates from the battery cell, or when the compression is less than 0.5 mm or greater than 0.5 mm, the main controller starts the servo motor. The servo motor drives the coating roller of the second coating mechanism to move, so that the coating roller of the second coating mechanism and the battery cell are in a compressed state, and the compression amount of the coating roller of the second coating mechanism is 0.5mm.

5. The cell coating method according to claim 1, characterized in that, The scanning device is a laser sensor or an optical sensor.

6. A battery cell, characterized in that, The battery cell is coated using the battery cell coating method as described in any one of claims 1-5.

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