Humidification control method and humidification control device

Abstract

The application discloses a humidification control method and a humidification control device. The method comprises the following steps: collecting a surface image of a coated pole piece, and controlling an atomization device to generate atomization according to the surface image and the distance between a humidification pipeline and the collecting module, so as to start the atomization device according to whether the surface of the coated pole piece has a crack, solve the problem of pole piece cracking, avoid the problem of continuous output of waste materials of the atomization device, and save material cost.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the battery production technical field, in particular to a humidification control method and a humidification control device. BACKGROUND

[0002] Lithium batteries are widely used in various fields, wherein, coating of battery pole piece is a key step in battery manufacturing process. The coating effect will directly affect the subsequent process and the battery qualification rate.

[0003] In the coating of lithium battery negative pole, the position of the thinning area is relatively thin compared to the material area. In the single / double side coating process, the single side thinning area will pass through twice baking, and after the double side baking ends, the single side thinning area passes through the roller with curvature. The internal stress of the thinning area cannot be released, which will cause cracks on the surface, affecting the battery performance. In the prior art, the coating pole piece is sprayed to increase the humidity of the coating pole piece and reduce the crack probability. However, the pole piece is long, and continuous spraying will inevitably increase the material energy consumption and production cost. SUMMARY

[0004] The present application provides a kind of humidification control method and humidification control device, avoid the problem of waste material that atomization device continues to output, save material cost.

[0005] The embodiment of the present application provides a kind of humidification control method, which is executed by a humidification control device. The control device includes a collection module, a collection support, an atomization device, a humidification pipeline, a nozzle and a humidification control module. The collection support is arranged at the detection starting point of the coating pole piece and located above the coating pole piece. The collection module is arranged on the collection support. The humidification pipeline is arranged above the coating pole piece in the running direction of the coating pole piece. The inlet of the humidification pipeline is connected with the atomization device. The nozzle is arranged at the lower end of the humidification pipeline, and the nozzle is connected with the inside of the humidification pipeline. The humidification control module is connected with the collection module and the atomization device respectively.

[0006] The method includes:

[0007] The collection module collects the surface image of the coating pole piece.

[0008] The humidification control module controls the atomization device to generate atomization according to the distance between the humidification pipeline and the collection module and the surface image, and sprays to the surface of the coating pole piece through the nozzle.

[0009] Optionally, the humidification control module controls the atomization device to generate atomization according to the distance between the humidification pipeline and the collection module and the surface image, and sprays to the surface of the coating pole piece through the nozzle, including:

[0010] When receiving the surface image, the humidification control module obtains identification information according to the surface image;

[0011] The spraying time is determined according to the distance between the humidification pipeline and the collection module and the running speed of the coating electrode piece;

[0012] The identification information is compared with preset good product image information, if it is judged that the surface image is not good, a bad signal is generated, and a first control signal is generated according to the bad signal and the spraying time; the first control signal is used to control the atomization device to produce atomization.

[0013] Optionally, after the bad signal is generated, if the time interval between the current bad signal and the next bad signal is less than the spraying time, a second control signal is generated, and the second control signal is used to control the atomization device to continuously atomize and output.

[0014] Optionally, the spraying time is determined according to the distance between the humidification pipeline and the collection module and the running speed of the coating electrode piece, comprising:

[0015] The spraying time is determined by an algorithm, wherein the algorithm is: T=S / V;

[0016] S is the distance between the humidification pipeline and the collection module, and V is the running speed of the coating electrode piece.

[0017] In a second aspect, an embodiment of the present application provides a humidification control device, comprising: a collection module, a collection support, an atomization device, a humidification pipeline, a nozzle and a humidification control module;

[0018] The collection support is arranged at a detection starting point position of the coating electrode piece and is located above the coating electrode piece; the collection module is arranged on the collection support and is used to collect a surface image of the coating electrode piece;

[0019] The humidification pipeline is arranged above the coating electrode piece in the running direction of the coating electrode piece, the inlet of the humidification pipeline is connected with the atomization device; the nozzle is arranged at the lower end of the humidification pipeline, and the nozzle is connected with the inside of the humidification pipeline in communication;

[0020] The humidification control module is connected with the collection module and the atomization device respectively; the humidification control module is used to control the atomization device to produce atomization according to the distance between the humidification pipeline and the collection module and the surface image, and the atomization is sprayed to the surface of the coating electrode piece by the nozzle.

[0021] Optionally, the collection module comprises a first collection unit and a second collection unit;

[0022] The collecting support is provided with a slide rail along the width direction of the coating electrode piece, the first collecting unit and the second collecting unit are arranged on the slide rail, the humidification control module is used for adjusting the distance between the first collecting unit and the second collecting unit according to the width of the coating electrode piece, and the first collecting unit and the second collecting unit are used for collecting the surface image of the coating electrode piece.

[0023] Optionally, the first collecting unit and the second collecting unit are linear array charge coupled elements.

[0024] Optionally, the adjustable range of the distance between the first collecting unit and the second collecting unit is 100-650mm.

[0025] Optionally, the vertical distance between the nozzle and the coating electrode piece is 30-80mm.

[0026] Optionally, in the running direction of the coating electrode piece, the distance between the humidification pipeline and the collecting module is at least greater than 800mm.

[0027] The technical scheme provided by the embodiment of the application collects the surface image of the coating electrode piece, controls the atomization device to generate atomization according to the surface image and the distance between the humidification pipeline and the collecting module, so as to start the atomization device according to whether there is a crack on the surface of the coating electrode piece, thereby avoiding the problem of waste material caused by continuous output of the atomization device, and saving the material cost. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 A structure schematic diagram of a humidification control device is provided for the embodiment of the application;

[0029] Figure 2 Another perspective structure schematic diagram of the humidification control device is provided for the embodiment of the application;

[0030] Figure 3 A flow schematic diagram of a humidification control method is provided for the embodiment of the application;

[0031] Figure 4 Another flow schematic diagram of a humidification control method is provided for the embodiment of the application;

[0032] Figure 5 Another flow schematic diagram of a humidification control method is provided for the embodiment of the application. DETAILED DESCRIPTION

[0033] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] Figure 1 A structural schematic diagram of a humidification control device is provided for the embodiments of the present application, Figure 2 Another perspective structural schematic diagram of the humidification control device is provided for the embodiments of the present application, referring to Figure 1 and Figure 2 The control device comprises a collection module 110, a collection support 120, an atomization device 130, a humidification pipeline 140, a nozzle 160 and a humidification control module (not shown in the figure). The collection support 120 is arranged at a detection starting point position of a coated pole piece 150 and is located above the coated pole piece 150. The collection module 110 is arranged on the collection support 120. The humidification pipeline 140 is arranged above the coated pole piece 150 in a running direction X of the coated pole piece 150. An inlet of the humidification pipeline 140 is connected with the atomization device 130. The nozzle 160 is arranged at a lower end of the humidification pipeline 140 and is connected with an inside of the humidification pipeline 140. The humidification control module is connected with the collection module 110 and the atomization device 130 respectively.

[0035] Specifically, the collecting support 120 is installed on both sides of the conveying mechanism of the coated pole piece 150, and the collecting module 110 is arranged on the collecting support 120, so that the collecting module 110 can vertically collect the information of the surface image of the coated pole piece 150. Specifically, the crossbeam of the collecting support 120 spans the coated pole piece 150, and the collecting module 110 is arranged on the crossbeam, so that the relative position of the collecting module 110 and the coated pole piece 150 can be adjusted along the crossbeam, and the position flexibility of image collection is improved. The collecting module 110 can adopt a linear array or a surface array charge coupled element. In the conveying direction of the coated pole piece 150, the humidifying pipeline 140 is arranged above the coated pole piece 150, and a loading platform is arranged on both sides of the conveying mechanism of the coated pole piece 150 to fix the atomizing device 130. The output port of the atomizing device 130 is connected with the inlet of the humidifying pipeline 140, the atomizing device 130 atomizes the slurry for humidification, and the slurry is uniformly sprayed on the coated pole piece 150 by the nozzle 160 through the humidifying pipeline 140. The humidifying control module judges whether there is a crack on the coated pole piece 150 according to the collected surface image, and if there is a crack, the atomizing device 130 generates atomization, and the atomization is sprayed on the surface of the coated pole piece 150 by the nozzle 160. According to the surface image, whether there is a crack on the coated pole piece 150 can be judged by using the image feature recognition and extraction process in the prior art, which will not be described again. When there is a crack, the atomizing device 130 is controlled to atomize, and finally the humidified slurry is sprayed on the surface of the coated pole piece 150. The spraying time can be determined according to the distance between the humidifying pipeline 140 and the collecting module 110. Thus, according to whether there is a crack on the surface of the coated pole piece 150, the atomizing device 130 is started, and the problem of continuous output of the atomizing device 130 and waste of materials is avoided, and the material cost is saved. At the same time, the control device can be modified on the existing conveying mechanism of the coating machine, which has strong adaptability and low modification difficulty.

[0036] Figure 3 A flowchart of a humidifying control method is provided for the embodiment of the present application. The embodiment can be applied to the humidification of a coated pole piece. The method can be executed by a humidifying control device, which can be realized by hardware and / or software. The method specifically includes the following steps:

[0037] S110, a collecting module collects a surface image of a coated pole piece.

[0038] Specifically, the collecting module 110 scans the surface of the coated pole piece 150 in real time, and obtains a surface image frame each time.

[0039] S120, a humidifying control module controls an atomizing device to generate atomization according to the distance between a humidifying pipeline and a collecting module and a surface image, and the atomization is sprayed on the surface of the coated pole piece by a nozzle 160.

[0040] Specifically, the surface image picture obtained by each scanning can be regarded as a pulse time sequence, and whether there is a crack or other defect in the surface image is judged, and if there is a defect, a corresponding control signal is generated in the pulse time sequence, so that when there is a defective coated pole piece 150, the atomization module atomizes and humidifies according to the corresponding control signal, and when there is no defective coated pole piece 150, the atomization module stops atomizing and humidifying according to the corresponding control signal, that is, the frequency of spraying can be controlled according to the time when the defect occurs. When there is a continuous defective coated pole piece 150, the atomization module can continuously atomize and humidify according to the corresponding control signal. The spraying time of the atomization module can be determined according to the distance between the humidification pipeline 140 and the collection module 110, for example, when the humidification pipeline 140 and the collection module 110 are close and there is no delay, the atomization device 130 can be started as soon as the defect is detected, and the spraying area obtained by the coating operation covers at least the area of the surface image. Generally, there is a certain delay problem, so the distance between the humidification pipeline 140 and the collection module 110 can be pre-set, so that when the defect is detected, the atomization device 130 is started, and the duration of the spraying time is at least greater than or equal to the time required for the coating to run the pre-set distance, so as to ensure that the spraying area covers at least the area of the surface image.

[0041] The technical scheme provided by the embodiment of the application realizes the starting of the atomization device according to whether there is a crack on the surface of the coated pole piece, avoids the problem of continuous output of the atomization device and waste of materials, and saves the cost of materials.

[0042] Figure 4 For another flowchart of the humidification control method provided by the embodiment of the application, see Figure 4 , including

[0043] S210, the collection module collects the surface image of the coated pole piece;

[0044] Specifically, the collection module 110 scans the surface of the coated pole piece 150 in real time, and obtains a surface image picture each time. For example, the collection module 110 uses a charge coupled device (CCD), and an industrial linear array CCD camera is arranged above the coated pole piece 150 based on the detection principle of CCD imaging, and a high-brightness LED linear spotlight cold light source can be used for lighting. The linear array CCD camera obtains the surface image of the coated pole piece 150, wherein the resolution of the surface image is related to the resolution and longitudinal line scanning frequency of the CCD camera. The linear array CCD camera scans in real time.

[0045] S220, when receiving the surface image, the humidification control module obtains identification information according to the surface image;

[0046] Specifically, the humidification control module can integrate a high-speed image processing unit, and identification information of the surface image, such as the length, width, depth and number of cracks, is extracted by image processing.

[0047] S230, determine the spraying time according to the distance between the humidification pipeline and the collection module and the running speed of the coating pole piece;

[0048] Specifically, the spraying time of the atomization module can be determined according to the distance between the humidification pipeline 140 and the collection module 110. For example, when the humidification pipeline 140 and the collection module 110 are close and no delay is considered, the atomization device 130 can be detected to be in a poor condition, and the spraying area obtained by the coating operation covers at least the area of the surface image. Generally, there is a certain delay problem, so the distance between the humidification pipeline 140 and the collection module 110 is set to a predetermined distance, so that when a defect is detected, the atomization device 130 is started, and the duration of the spraying time is at least greater than or equal to the time required for the coating to run the predetermined distance. That is, the time for the crack position to run to the humidification pipeline 140 is obtained according to the ratio of the distance between the humidification pipeline 140 and the collection module 110 and the running speed of the coating pole piece 150, that is, as the spraying time. For example, the distance between the humidification pipeline 140 and the collection module 110 is set to 800mm, and the coating running speed is 10m / min, so the spraying time T1 is 4.7s. In order to ensure that the nozzle 160 sprays the surface image corresponding to the crack position completely, a delay time can be added to increase the spraying time, so as to increase the spraying area, so as to ensure that the spraying area covers the area of the surface image. For example, the spraying time can be 4.7s plus a delay time of 2s, that is, 6.7s.

[0049] S240, compare the identification information with the preset good product image information, if it is judged that the surface image is defective, generate a defective signal, and generate a first control signal according to the defective signal and the spraying time; the first control signal is used to control the atomization device to produce atomization.

[0050] Specifically, the preset good product image information can be stored as known data to the humidification control module, the humidification control module compares the identification information with the preset good product image information, for example, if the length of the crack exceeds 5 mm, it can be determined as a defective product, and a defective signal is generated, the defective signal is used as an intermediate signal, and information such as the frequency and number of surface image generation defects can be recorded, and when the defective signal is generated, it indicates that there is a crack on the current surface image, and a first control signal is generated in combination with the spraying time. In combination with the above embodiment, the surface image picture obtained by scanning each time can be regarded as a pulse time sequence, and if the surface image is determined to have defects, the first control signal with the spraying time is generated in the pulse time sequence, so that the frequency spraying humidification can be performed according to the frequency of the defects, and the problem of continuous output of the atomization device 130 is avoided, and the material cost is saved.

[0051] Optionally, after the defective signal is generated, if the time interval between the current defective signal and the next defective signal is less than the spraying time, a second control signal is generated, and the second control signal is used to control the atomization device 130 to continuously atomize and output.

[0052] Specifically, when one defective signal is determined, and another defective signal is determined again, the interval between the two defective signals is less than the spraying time, that is, the surface corresponding to the current defective signal enters the transportation interval between the humidification pipeline 140 and the collection module 110, but has not reached the nozzle 160 of the humidification pipeline 140, and the surface corresponding to the next defective signal will also enter the transportation interval between the humidification pipeline 140 and the collection module 110, and after the surface corresponding to the current defective signal is humidified, the spraying humidification of the surface corresponding to the next defective signal is started again, and the problem of not humidifying the defective area is prone to occur, therefore, when the interval between the two defective signals is less than the spraying time, the second control signal is generated, and at this time, the atomization device 130 is controlled to change to continuous atomization output, thereby avoiding the problem of not humidifying the defective area.

[0053] Figure 5 Another flowchart of a humidification control method is provided for the embodiment of the present application, see Figure 5 , which comprises:

[0054] S1, taking a real-time photo of the incoming coated pole piece 150, S2, after the picture is collected, comparing the photo with a good product photo through an internal program, judging whether the sample meets the requirements through deep learning, if it is a good product, S3, discharging the coated pole piece 150, if it is a defective product, S4, atomizing and outputting through the atomization device 130, and performing real-time humidification treatment on the thin area to prevent cracks on the surface after passing through the roller.

[0055] The embodiment of the present application also provides a humidification control device, see Figure 1, comprising: a collection module 110, a collection support 120, an atomization device 130, a humidification pipeline 140, a nozzle 160 and a humidification control module;

[0056] The collection support 120 is arranged at a detection starting point of the coated pole piece 150 and is located above the coated pole piece 150; the collection module 110 is arranged on the collection support 120 and is used for collecting a surface image of the coated pole piece 150;

[0057] The humidification pipeline 140 is arranged above the coated pole piece 150 in a running direction of the coated pole piece 150, and an inlet of the humidification pipeline 140 is connected with the atomization device 130; the nozzle 160 is arranged at a lower end of the humidification pipeline 140 and is connected with an inside of the humidification pipeline 140 in communication;

[0058] The humidification control module is connected with the collection module 110 and the atomization device 130 respectively; the humidification control module is used for controlling the atomization device 130 to generate atomization according to the surface image and spraying the atomization to a surface of the coated pole piece 150 by the nozzle 160.

[0059] Specifically, the collecting support 120 is installed on both sides of the conveying mechanism of the coated electrode 150, and the collecting module 110 is arranged on the collecting support 120. The collecting module 110 can collect the information of the surface image of the coated electrode 150 vertically. Specifically, the crossbeam of the collecting support 120 spans the coated electrode 150, and the collecting module 110 is arranged on the crossbeam, so that the relative position of the collecting module 110 and the coated electrode 150 can be adjusted along the crossbeam, and the position flexibility of the image collection is improved. The collecting module 110 can adopt a linear array or a surface array charge-coupled element. In the conveying direction of the coated electrode 150, the humidifying pipeline 140 is arranged above the coated electrode 150, and a loading platform is arranged on both sides of the conveying mechanism of the coated electrode 150 to fix the atomizing device 130. The output port of the atomizing device 130 is connected with the inlet of the humidifying pipeline 140. The atomizing device 130 atomizes the slurry for humidification, and the slurry is uniformly sprayed on the coated electrode 150 by the nozzle 160 through the humidifying pipeline 140. The humidifying control module determines whether there is a crack on the coated electrode 150 according to the collected surface image. If there is a crack, the atomizing device 130 atomizes, and the slurry is sprayed on the surface of the coated electrode 150 by the nozzle 160. According to the surface image, whether there is a crack on the coated electrode 150 can be determined by using the image feature recognition and extraction process in the prior art, which will not be described again. When there is a crack, the atomizing device 130 is controlled to atomize, and finally the slurry is sprayed on the surface of the coated electrode 150. The spraying time can be determined according to the distance between the humidifying pipeline 140 and the collecting module 110. Thus, according to whether there is a crack on the surface of the coated electrode 150, the atomizing device 130 is started, and the problem of waste material caused by continuous output of the atomizing device 130 is avoided, and the material cost is saved. At the same time, the control device can be modified on the existing conveying mechanism of the coating machine, which has strong adaptability and low modification difficulty.

[0060] Optionally, the collecting module 110 includes a first collecting unit 111 and a second collecting unit 112.

[0061] The collecting support 120 is provided with a sliding rail in the width direction of the coated electrode 150, and the first collecting unit 111 and the second collecting unit 112 are arranged on the sliding rail. The humidifying control module is used to adjust the distance between the first collecting unit 111 and the second collecting unit 112 according to the width of the coated electrode, and the first collecting unit and the second collecting unit are used to collect the surface image of the coated electrode.

[0062] Specifically, a slide rail is arranged on the cross beam of the coating electrode 150, and the first collecting unit 111 and the second collecting unit 112 are arranged on the two sides of the slide rail, wherein the first collecting unit 111 and the second collecting unit 112 can be linear array CCD cameras, and the positions of the CCD cameras on the two sides can be adjusted in opposite directions or opposite directions to adapt to the picture collecting requirements of coating electrode 150 with different widths. The humidification control module can accurately adjust the distance between the first collecting unit 111 and the second collecting unit 112 according to the actual width of the coating electrode 150, so that the first collecting unit 111 and the second collecting unit 112 can collect the surface image of the coating electrode 150 that meets the requirements, and then determine whether there is a crack on the coating electrode 150 according to the collected surface image. If there is a crack, the atomization device 130 generates atomization, and then the nozzle 160 sprays to the surface of the coating electrode 150.

[0063] Optionally, the adjustable range of the distance between the first collecting unit 111 and the second collecting unit 112 is 100-650mm, which can meet the width of most mainstream coating machines. For different machine types, the width of the collecting support 120 can be adaptively adjusted to meet different adjustable ranges. Exemplarily, the nozzle 160 can be made of stainless steel or copper.

[0064] Optionally, two nozzles can be arranged on the humidification pipeline and distributed at both ends of the humidification pipeline. The humidification pipeline 140 and the nozzle 160 can be indirectly connected, for example, by using a spring telescopic pipe connection or the like. Therefore, the nozzle 160 can be adjusted according to the different widths of the coating electrode 150. In the extension direction of the humidification pipeline, the adjustable range of the distance between the nozzles is 100-650mm.

[0065] Optionally, the vertical distance between the nozzle 160 and the coating electrode 150 is 30-80mm. If the vertical distance between the nozzle 160 and the coating electrode 150 is too close, the humidified slurry spray will be uneven, causing the slurry to clump. If the distance is too far, the humidified slurry spray will be too thin and cannot meet the requirements of coating humidification. Therefore, the vertical distance between the nozzle 160 and the coating electrode 150 is set to be between 30-80mm in the embodiment of the application. Exemplarily, the spray flow is generally set to be 5-12ml / min. When the humidification pipeline 140 and the collecting module 110 are relatively close, the spray slurry is easy to affect the collecting module 110, which is not convenient for cleaning. In addition, considering the time delay, the distance between the humidification pipeline 140 and the collecting module 110 is at least greater than 800mm.

[0066] The embodiment of the application also provides a coating machine comprising any of the humidification control devices of the application. The control device can be retrofitted on the traction mechanism of the existing coating machine, which is highly adaptable and has low modification difficulty.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A humidification control method, executed by a humidification control device, characterized in that, The control device includes: a data acquisition module, a data acquisition bracket, an atomizing device, a humidification pipe, a nozzle, and a humidification control module; the data acquisition bracket is positioned at the detection starting point of the coated electrode, above the coated electrode; the data acquisition module is mounted on the data acquisition bracket, and the humidification pipe is positioned above the coated electrode in the direction of electrode movement, with its inlet connected to the atomizing device; the nozzle is positioned at the lower end of the humidification pipe, and the nozzle communicates with the interior of the humidification pipe; the humidification control module is connected to both the data acquisition module and the atomizing device. The method includes: The acquisition module acquires surface images of the coated electrode sheet; The humidification control module obtains recognition information based on the surface image; compares the recognition information with preset good product image information; if the surface image is determined to be defective, a defect signal is generated; if the time interval between the current defect signal and the next defect signal is less than the spray time, a second control signal is generated, which is used to control the atomizing device to continuously atomize and output.

2. The humidification control method according to claim 1, characterized in that, Also includes: The humidification control module determines the spraying time based on the distance between the humidification pipe and the acquisition module and the running speed of the coated electrode. A first control signal is generated based on the defective signal and the spraying time; the first control signal is used to control the atomizing device to produce atomization.

3. The humidification control method according to claim 2, characterized in that, The spraying time is determined based on the distance between the humidification pipe and the acquisition module and the operating speed of the coated electrode, including: The spraying time is determined by a formula, wherein the formula is: T=S / V; S is the distance between the humidification pipe and the acquisition module, and V is the operating speed of the coated electrode.

4. A humidification control device, characterized in that, include: Data acquisition module, data acquisition bracket, atomizing device, humidification pipe, nozzle, and humidification control module; The acquisition bracket is mounted on both sides of the coated electrode transport traction mechanism and is set at the detection starting point of the coated electrode, located above the coated electrode; the acquisition module is set on the acquisition bracket and is used to acquire the surface image of the coated electrode. In the direction of travel of the coated electrode, the humidification pipe is arranged above the coated electrode, and the inlet of the humidification pipe is connected to the atomizing device; the nozzle is arranged at the lower end of the humidification pipe, and the nozzle is connected to the interior of the humidification pipe. The humidification control module is connected to the acquisition module and the atomizing device respectively; the humidification control module is used to acquire identification information based on the surface image; compare the identification information with preset good product image information; if the surface image is determined to be defective, a defect signal is generated; if the time interval between the current defect signal and the next defect signal is less than the spray time, a second control signal is generated; the second control signal is used to control the atomizing device to continuously atomize and output.

5. The humidification control device according to claim 4, characterized in that, The acquisition module includes a first acquisition unit and a second acquisition unit; The acquisition bracket is provided with a slide rail along the width direction of the coated electrode sheet. The first acquisition unit and the second acquisition unit are disposed on the slide rail. The humidification control module is used to adjust the distance between the first acquisition unit and the second acquisition unit according to the width of the coated electrode sheet. The first acquisition unit and the second acquisition unit are used to acquire surface images of the coated electrode sheet.

6. The humidification control device according to claim 5, characterized in that, The first acquisition unit and the second acquisition unit are linear array charge-coupled devices.

7. The humidification control device according to any one of claims 5-6, characterized in that, The adjustable range of the distance between the first acquisition unit and the second acquisition unit is 100-650mm.

8. The humidification control device according to any one of claims 4-6, characterized in that, The vertical distance between the nozzle and the coated electrode is 30-80 mm.

9. The humidification control device according to any one of claims 4-6, characterized in that, In the direction of operation of the coated electrode, the distance between the humidification pipe and the acquisition module is at least greater than 800mm.

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