Coating control method and device, coating machine, equipment and medium

Abstract

The invention provides a coating control method and device of a coating machine, the coating machine, equipment and a medium, and relates to the technical field of coating processing.The method comprises the steps that before a coating mechanism is controlled to start continuous coating, the distance length between the tail of a pole piece closest to an outlet of the coating mechanism on a conveying belt and the outlet of the coating mechanism is obtained; the difference value between the distance length and the preset pole piece interval serves as the target displacement, and the conveyor belt is controlled to reversely run by the target displacement and then stops running, so that after the coating mechanism starts continuous coating, the preset pole piece interval is kept between the continuously coated pole piece and the target pole piece. In this way, the coating machine is controlled to perform automatic rewinding and continuous coating, so that the pole pieces conveyed on the conveyor belt before and after continuous coating in the coating process are kept at a uniform interval.

Description

Technical Field

[0001] The present invention relates to the technical field of coating processing, and in particular to a coating control method, device, coating machine, equipment and medium. Background Art

[0002] The coating process involves evenly applying a well-stirred slurry or coating to a substrate and then fixing the coating on the substrate through drying or curing, thereby forming a film layer with specific functions. This process is used in various industries, such as lithium-ion battery manufacturing, coating production, and printing.

[0003] In the coating process of the current lithium battery industry, for various reasons such as protecting the equipment and reducing the impact on the coating quality, when the coating machine is shut down, the coating mechanism will respond to the shutdown command and stop coating, while the conveyor belt will rely on the inertia of the drive mechanism to continue rotating forward until it stops steadily. In this way, after restarting the machine to continue coating, there will be a large gap between the electrode sheet coated by the coating mechanism and the last electrode sheet before the shutdown, such as Figure 1 As shown in the figure, the coating process is a key pre-process in the entire production process. If there are irregular intervals between the coated electrodes, it will directly affect the splicing quality and marking effect of the subsequent slitting process. Summary of the Invention

[0004] Based on this, it is necessary to provide a coating control method, device, coating machine, equipment and medium to address the above technical problems, so as to solve the problem of non-uniform electrode spacing in the coating process.

[0005] A first aspect of an embodiment of the present application provides a coating control method for a coating machine, wherein the coating machine includes a coating mechanism and a conveyor belt; the coating mechanism is used to coat the slurry on the substrate to form a coated electrode; the conveyor belt is used to carry and convey the coated electrode; the method includes: before controlling the coating mechanism to start re-coating, obtaining the distance length between the tail of the target electrode and the outlet of the coating mechanism, the target electrode is the electrode on the conveyor belt closest to the outlet of the coating mechanism, and the tail is the part of the target electrode closest to the outlet of the coating mechanism; the difference between the distance length and the preset electrode spacing is used as the target displacement; according to the target displacement, the conveyor belt carrying the target electrode is controlled to rewind so that the preset electrode spacing is maintained between the electrode output after the coating mechanism re-coats and the target electrode.

[0006] In one embodiment, the coating machine also includes a detection device for detecting the loading plane of the conveyor belt, and the obtaining of the distance length between the tail of the target pole piece and the outlet of the coating mechanism includes: when the detection point of the detection device on the conveyor belt is located between the outlet of the coating mechanism and the tail of the target pole piece, controlling the conveyor belt to rewind; during the rewinding process, determining whether the detection device has detected the tail of the target pole piece based on the signal returned by the detection device; when the detection device detects the tail of the target pole piece, using the distance length between the detection point of the detection device on the conveyor belt and the outlet of the coating mechanism as the distance length between the tail of the target pole piece and the outlet of the coating mechanism.

[0007] In one embodiment, the signal includes a first type of signal returned when the detection device detects the pole piece, or a second type of signal returned when the detection device does not detect the pole piece, and based on the signal returned by the detection device, it is determined that the detection device has detected the tail of the target pole piece, including: when the signal returned by the detection device changes from the second type of signal to the first type of signal, it is determined that the detection device has detected the tail of the target pole piece.

[0008] In one embodiment, the detection device includes a length measuring optical fiber sensor disposed above the conveyor belt.

[0009] In one embodiment, the method further includes: in response to a coating machine shutdown instruction, determining whether there is an uncoated substrate in the coating mechanism; if so, adaptively adjusting the coating speed of the coating mechanism, and after coating is completed, controlling the coating mechanism and the conveyor belt to shut down.

[0010] In one embodiment, the method further includes: before controlling the conveyor belt to stop, determining whether the detection device is located between the coating mechanism outlet and the tail of the target electrode; if so, controlling the conveyor belt to stop.

[0011] The second aspect of an embodiment of the present application provides a coating control device for a coating machine, wherein the coating machine includes a coating mechanism and a conveyor belt; the coating mechanism is used to coat the slurry on the substrate to form a coated electrode; the conveyor belt is used to carry and convey the coated electrode; the device includes: an acquisition module, used to obtain the distance length between the tail of the target electrode and the outlet of the coating mechanism before controlling the coating mechanism to start re-coating, the target electrode being the electrode on the conveyor belt closest to the outlet of the coating mechanism, and the tail being the part of the target electrode closest to the outlet of the coating mechanism; a determination module, used to take the difference between the distance length and the preset electrode spacing as the target displacement; a control module, used to control the conveyor belt to rewind the target electrode according to the target displacement, so that the preset electrode spacing is maintained between the electrode output after the coating mechanism re-coats and the target electrode.

[0012] In one embodiment, the coating machine also includes a detection device for detecting the loading plane of the conveyor belt, and the acquisition module is used to: control the rewinding operation of the conveyor belt when the detection point of the detection device on the conveyor belt is between the outlet of the coating mechanism and the tail of the target pole piece; during the rewinding process, determine whether the detection device has detected the tail of the target pole piece based on the signal returned by the detection device; when the detection device detects the tail of the target pole piece, use the distance between the detection point of the detection device on the conveyor belt and the outlet of the coating mechanism as the distance between the tail of the target pole piece and the outlet of the coating mechanism.

[0013] In one embodiment, the signal includes a first type of signal returned when the detection device detects the pole piece, or a second type of signal returned when the detection device does not detect the pole piece, and the acquisition module is used to: when the signal returned by the detection device changes from the second type of signal to the first type of signal, determine that the detection device has detected the tail of the target pole piece.

[0014] In one embodiment, the detection device includes a length measuring optical fiber sensor disposed above the conveyor belt.

[0015] In one embodiment, the device is also used to: in response to a coating machine shutdown instruction, determine whether there is an uncoated substrate in the coating mechanism; if so, adaptively adjust the coating speed of the coating mechanism, and after the coating is completed, control the coating mechanism and the conveyor belt to shut down.

[0016] In one embodiment, the device is further used to: before controlling the conveyor belt to stop, determine whether the detection device is located between the coating mechanism outlet and the tail of the target electrode; if so, control the conveyor belt to stop.

[0017] The third aspect of the embodiments of the present application provides a coating machine, comprising a coating mechanism, a conveying belt and the coating control device of the coating machine according to any one of the second aspect.

[0018] The fourth aspect of the embodiments of the present application provides an electronic device, comprising a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the coating control method of the coating machine according to any one of the first aspect when executing the computer program. The fifth aspect of the embodiments of the present application provides a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the coating control method of the coating machine according to any one of the second aspect.

[0019] To sum up, the present application provides a coating control method, device, coating machine, equipment and medium, the method acquires the distance length between the tail of the pole piece closest to the coating mechanism outlet on the conveying belt and the coating mechanism outlet before controlling the coating mechanism to start the continuous coating, and takes the difference between the distance length and the preset pole piece interval as the target displacement, and controls the conveying belt to run in reverse after the target displacement and then stop running, so that the pole piece continuously coated after the coating mechanism starts the continuous coating maintains the preset pole piece interval with the target pole piece. In this way, the coating machine is automatically controlled to run in reverse for continuous coating, so that the pole pieces conveyed on the conveying belt before and after the continuous coating in the coating process maintain a uniform interval. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a schematic diagram of a stop field of the coating machine in the coating process.

[0022] Figure 2 is a flowchart of a coating control method of a coating machine according to an embodiment of the present application; Figure 3 is a comparison diagram of the operation scenes before and after the coating machine is controlled to run in reverse according to an embodiment of the present application; Figure 4 is a flowchart of a coating control method of a coating machine according to another embodiment of the present application; Figure 51 is a schematic structural diagram of a coating control device of a coating machine provided by one embodiment of the present invention; Figure 6 It is a structural schematic diagram of a coating machine provided by one embodiment of the present invention.

[0023] Figure 7 This is a structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0026] It will also be understood that the term "and / or" used in the present description and appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0027] As used in the present specification and the appended claims, the term “if” may be interpreted as “when” or “upon” or “in response to determining”, depending on the context. Similarly, the phrase “if it is determined” or “if compared to [described condition or event]” may be interpreted as meaning “upon determination” or “in response to determination” or “upon comparison to [described condition or event]” or “in response to comparison to [described condition or event]”, depending on the context.

[0028] In addition, in the description of the present specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0029] References to "one embodiment" or "some embodiments" in the present specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0030] It should be understood that the order of execution of the steps in the following embodiments does not necessarily mean the order in which they are executed. The order in which each process is executed should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0031] The coating control method proposed in the embodiments of this application can be applied to a coating machine during coating processes involving various substrates, including but not limited to battery electrode coating. This method controls the coating machine's shutdown, rewinding, and re-coating processes during the coating process to ensure a uniform spacing between the electrode sheets before and after re-coating.

[0032] The coating mechanism of the coating machine of the embodiment of the present application is used to apply the slurry on the substrate to form a coated electrode; Specifically, the coating mechanism can coat the positive electrode slurry on the positive electrode substrate by intermittent coating to obtain a coated positive electrode sheet. The coated positive electrode sheet is dried, rolled, and slit to obtain a positive electrode sheet for making a battery cell. The coating mechanism can also coat the negative electrode slurry on the negative electrode substrate by intermittent coating to obtain a coated negative electrode sheet. The coated negative electrode sheet is dried, rolled, and slit to obtain a negative electrode sheet for making a battery cell. like Figure 2 As shown, the embodiment of the present application provides a coating control method of a coating machine, which may include the following steps: S201, before controlling the coating mechanism to begin continuous coating, obtain the distance between the tail of the target electrode piece and the coating mechanism outlet. The target electrode piece is the electrode piece on the conveyor belt closest to the coating mechanism outlet, and the tail is the portion of the target electrode piece closest to the coating mechanism outlet. The target electrode piece is the section of the substrate where the slurry is applied for stripping to form a single electrode piece.

[0033] When appearance abnormalities such as material defects, uneven coating, etc. are detected on the coated pole piece in the coating process, the coating machine needs to be controlled to stop so as to handle the abnormal condition and restart after the handling is completed.

[0034] For example, when the coating machine needs to be stopped, the controller (such as a PLC control system) of the coating machine sends a stop command to each mechanism of the coating machine to control each mechanism to execute the stop, such as controlling the coating mechanism to execute the stop, controlling the conveying mechanism to execute the stop, controlling the drying mechanism to execute the stop, etc. The coating mechanism can include components such as a coating knife die and a coating roller, the conveying mechanism can include a conveyor belt, and the drying mechanism can include an oven.

[0035] The coating mechanism is restarted to execute the coating operation after stopping, which is called continuous coating.

[0036] The coating control device acquires the distance length between the tail of the target pole piece on the conveyor belt and the outlet of the coating mechanism before controlling the coating mechanism to start the continuous coating.

[0037] It should be noted that the outlet of the coating mechanism can be understood as Figure 3 the outlet of the coating knife die.

[0038] The conveyor belt conveys the pole piece coated by the coating knife die into the oven, so the forward movement of the conveyor belt is moving from the coating knife die to the oven inlet, and the reverse movement of the conveyor belt is moving from the oven inlet to the outlet of the coating knife die.

[0039] In this embodiment, the target pole piece is the last pole piece conveyed by the conveyor belt to the oven, i.e. Figure 3 pole piece 1 in FIG. 1, which is the closest pole piece to the outlet of the coating knife die.

[0040] The tail of the target pole piece is the part of the target pole piece closest to the outlet of the coating knife die. Since the pole pieces conveyed on the conveyor belt are parallel to the coating knife die, the tail of the target pole piece can also be understood as a side of the target pole piece close to the coating knife die, such as Figure 3 side 2 of pole piece 1 indicated in FIG. 1.

[0041] In an embodiment, the distance length between the tail of the target pole piece and the outlet of the coating mechanism can be acquired by various ways such as laser ranging or radar ranging.

[0042] S202, taking the difference between the distance length and the preset pole piece interval as a target displacement.

[0043] S203, controlling the conveyor belt to carry out reverse movement of the target pole piece according to the target displacement, so as to maintain the preset pole piece interval between the pole piece output by the coating mechanism after the continuous coating and the target pole piece.

[0044] For example, if the distance between the tail of the target electrode and the coating die outlet is 1000mm and the preset electrode spacing is 20mm, then 1000-20=980mm is used as the target displacement. The coating control device controls the conveyor belt to rewind 980mm so that the target electrode carried by the conveyor belt moves with the conveyor belt to a position 20mm before the coating die outlet. Figure 3 The state after rewinding.

[0045] In this state, the coating control device controls the coating mechanism to start re-coating. This ensures that the gap between the newly coated electrode and the target electrode on the conveyor belt maintains the preset electrode gap. This ensures that even after the coating machine restarts for re-coating, it can still maintain a uniform gap between any adjacent electrode sheets on the conveyor belt, facilitating subsequent processing and improving overall production efficiency and product quality.

[0046] In summary, the coating control method proposed in the embodiment of the present application first obtains the distance between the tail of the electrode closest to the coating mechanism outlet on the conveyor belt and the coating mechanism outlet before controlling the coating mechanism to start the coating. The difference between the distance and the preset electrode spacing is used as the target displacement, and the conveyor belt is controlled to rewind and run to the target displacement and then stop. In this way, after the coating mechanism starts the coating, the electrode that is coated will maintain the preset electrode spacing with the target electrode. In this way, the coating machine is controlled to automatically rewind and continue coating, so that the electrode pieces conveyed on the conveyor belt before and after the coating process maintain a uniform spacing, which facilitates the subsequent processing operations.

[0047] Based on the above embodiment, the coating machine further includes a detection device for detecting the loading plane of the conveyor belt.

[0048] like Figure 4 As shown, the above step S201 of "obtaining the distance between the tail of the target electrode and the outlet of the coating mechanism" may include the following steps: S401 , when the detection point of the detection device on the conveyor belt is located between the coating mechanism outlet and the tail of the target electrode, controlling the conveyor belt to rewind.

[0049] In some embodiments, the detection device can be set in a fixed position. Before controlling the conveyor belt to rewind, the conveyor belt is first controlled to run forward, carrying the target pole piece to the front of the detection device, that is, the detection device is located between the coating mechanism outlet and the tail of the target pole piece.

[0050] In other embodiments, the detection device can be moved flexibly, and the coating control device can observe whether the detection device is located between the coating mechanism outlet and the tail of the target pole piece based on the signal returned by the detection device. If not, the detection device is controlled to move until the detection device is located between the coating mechanism outlet and the tail of the target pole piece.

[0051] When the detection point of the detection device on the conveyor belt is between the coating mechanism outlet and the tail of the target electrode, the coating control device controls the conveyor belt to rewind. In this way, during the rewinding process, the first electrode detected by the detection device can be considered as the target electrode.

[0052] S402 , during the rewinding process, determining whether the detection device has detected the tail of the target pole piece based on the signal returned by the detection device.

[0053] In some embodiments, the detection device may be activated after the rewinding starts, so that the detection device can detect the object loading surface of the conveyor belt in real time and return the generated signal.

[0054] The coating control device can analyze the signal returned by the detection device to determine whether the detection device has detected the tail of the target pole piece.

[0055] In one example, the detection device may include a sensor. For example, the sensor may be a sensor capable of emitting light signals. The sensor transmits the light signals toward the load surface of the conveyor belt and detects the load surface by detecting the light signals reflected from the surface. For example, a fiber optic sensor operates based on the propagation characteristics of light in optical fibers. When a light signal propagates through an optical fiber and encounters different media or structural changes, the light signal undergoes corresponding changes. The fiber optic sensor detects these changes in the light signal and converts them into electrical or digital signals.

[0056] If the signal returned by the detection device in step S402 includes an electrical signal or a digital signal converted by the detection device, the coating control device may analyze the real-time acquired signal to determine the signal of the first detection of the target electrode piece, which is the signal returned when the detection device first detects the tail of the target electrode piece.

[0057] In another example, the detection device may include a camera that captures real-time images of the conveyor belt's loading surface. The returned signal includes data from the image, and the coating control device analyzes the signal to determine whether the electrode portion appears in the signal. For example, if the portion of the conveyor belt where no electrode is placed appears white, and the electrode is black, then when the first black pixel is identified in the image signal returned by the detection device, it is considered that the detection device has detected the tail of the target electrode.

[0058] S403, when the detection device detects the tail of the target pole piece, the distance between the detection point of the detection device on the conveyor belt and the outlet of the coating mechanism is used as the distance between the tail of the target pole piece and the outlet of the coating mechanism.

[0059] It should be noted that the detection point of the detection device on the conveyor belt can be understood as the point of the detection device closest to the tail of the target pole piece in the sampling area on the conveyor belt bearing plane.

[0060] For example, if the detection device is a fiber optic sensor, the point on the carrying plane of the conveyor belt that can reflect the light signal to the fiber optic sensor is used as the detection point of the detection device; if the detection device includes a camera, the point closest to the tail of the target pole piece in the camera shooting area is used as the detection point of the detection device.

[0061] The position of the detection point can be determined by pre-calibrating the relative position between the detection point and the detection device, and then determining the position of the detection point in combination with the relative position and the position of the detection device.

[0062] If the detection device is set at a fixed position, the distance between its detection point and the coating mechanism outlet can also be pre-calibrated.

[0063] If the position of the detection device changes flexibly, the position of the detection device can be obtained from the controller that controls the movement of the detection device, and then the current position of the detection device can be determined by combining the relative position of the detection point and the detection device.

[0064] In an embodiment of the present application, when the detection device detects the tail of the target pole piece, the distance between the detection point of the detection device on the conveyor belt and the outlet of the coating mechanism is used as the distance between the tail of the target pole piece and the outlet of the coating mechanism.

[0065] In addition to the method provided in this embodiment for obtaining the distance between the tail of the target pole piece and the outlet of the coating mechanism, the distance between the tail of the target pole piece and the outlet of the coating die can also be determined by setting an infrared sensor, a lidar sensor, etc. at the outlet of the coating die.

[0066] In addition, a fixed position can be pre-set, and the operator controls the conveyor belt to pause when the tail of the target electrode reaches the fixed position, and the distance between the fixed position and the coating mechanism outlet is used as the distance between the tail of the target electrode and the coating mechanism outlet. Of course, there are other ways to obtain the above distance length, which will not be repeated here.

[0067] However, in this embodiment, when the detection point of the detection device on the conveyor belt is located between the coating mechanism outlet and the tail of the target electrode, the conveyor belt is controlled to rewind, and the detection device is used to detect the electrode on the conveyor belt during the rewinding process. When the target electrode moves to the detection point of the detection device, the distance between the detection point of the detection device and the coating mechanism outlet is used as the distance between the tail of the target electrode and the coating mechanism outlet. This method is more intelligent and convenient than the operator controlling the movement of the conveyor belt and moving the target electrode to a fixed position, and can automatically and accurately obtain the distance between the tail of the target electrode and the coating mechanism outlet.

[0068] Based on the above embodiment, the signal returned by the detection device may include a first type of signal returned when the detection device detects a pole piece, or a second type of signal returned when the detection device does not detect a pole piece. In the above step S402 "determining whether the detection device has detected the tail of the target pole piece based on the signal returned by the detection device", it can be determined that the detection device has detected the tail of the target pole piece based on the signal returned by the detection device in the following manner: In this embodiment, the signal returned by the detection device can be obtained in real time. When the obtained signal changes from the second type of signal to the first type of signal, that is, when it changes from not detecting the target pole piece to detecting the target pole piece, it is determined that the detection device has detected the tail of the target pole piece.

[0069] If the acquired signal is always the second type signal, it is considered that the detection device has not detected the target pole piece.

[0070] In this way, by comparing the signals received at two consecutive moments and judging whether the two signals are the same, the judgment of whether the detection device has detected the tail of the target pole piece can be completed; compared with analyzing the data of each received signal and extracting information that can characterize the target pole piece from these data to determine whether the detection device has detected the target pole piece, the method of this embodiment has less calculation amount and can determine the result more quickly, so that the final "distance length between the detection point and the coating mechanism outlet" can have a smaller error with the "distance length between the tail of the target pole piece and the coating mechanism outlet".

[0071] Based on the above embodiment, the sensor included in the above detection device can be a length measuring optical sensor arranged above the conveyor belt. In the coating process, the length measuring optical fiber sensor is a key detection device, which can be used to measure the length parameters of the pole piece.

[0072] In this embodiment, a fiber optic length-measuring sensor located above the conveyor belt (i.e., the upper fiber optic length-measuring sensor) is further used to detect the conveyor belt's support surface during rewinding and continuous coating. This allows the coating control device to determine whether the fiber optic length-measuring sensor has reached the tail of the target pole piece based on the signal returned by the fiber optic length-measuring sensor. This eliminates the need for a separate sensor to detect the tail of the target pole piece, reducing the number of sensors required.

[0073] Continued coating refers to restarting the coating machine after stopping it to continue the coating process. In this embodiment of the application, when the coating control device receives a coating machine shutdown command, it determines whether there are any substrates in the coating mechanism that have not been completely coated. If there are any substrates that have not been completely coated, the coating speed of the coating mechanism is adaptively adjusted to complete the coating operation on the substrate. After the coating is completed, the coating mechanism and conveyor belt are controlled to shut down.

[0074] The above-mentioned coating machine shutdown instruction may include a shutdown instruction or a standby instruction.

[0075] For example, if an abnormality in the electrode's appearance is detected during the coating process, such as a material defect or uneven coating, the operator simply presses the stop button. The coating control system immediately responds, intelligently adjusting the coating speed to ensure that the electrode currently being processed completes a full coating cycle before stopping smoothly. This process not only avoids material waste but also ensures the integrity and quality of each electrode.

[0076] On the basis of the above embodiment, before controlling the conveyor belt to stop, the embodiment of the present application can also detect the bearing plane of the conveyor belt through the detection device (such as a sensor) provided in the above embodiment, and judge whether the sensor is located between the outlet of the coating mechanism and the tail of the target pole piece based on the signal returned by the sensor.

[0077] For example, before the conveyor belt is controlled to stop, the conveyor belt is running forward, and the last target pole piece on the conveyor belt will pass the sensor and continue to move away from the coating mechanism exit. If the sensor does not detect the first type of signal for multiple consecutive moments, it can be considered that the sensor has not detected the pole piece for a long time, and it can be considered that the last target pole piece on the conveyor belt has passed the sensor, and it can be considered that the sensor is between the tail of the target pole piece and the coating mechanism exit.

[0078] When the sensor is between the outlet of the coating mechanism and the tail of the target pole piece, the conveyor belt is controlled to stop and the conveyor belt will stop stably.

[0079] In this embodiment, the sensor's position remains unchanged. Instead, the conveyor belt is controlled to a stable stop when the target electrode piece moves in front of the sensor (i.e., in the direction away from the coating mechanism). This ensures that the position of the sensor's detection point remains unchanged, and the distance between the detection point and the coating mechanism exit remains unchanged. Therefore, in this embodiment, when the sensor detects the tail of the target electrode piece, no calculation is performed; the distance between the detection point and the coating mechanism exit is directly determined as the distance between the target electrode piece and the coating mechanism exit. This minimizes the error between the determined distance and the actual displacement required to move the target electrode piece.

[0080] Based on the above embodiment, in the process of controlling the rewinding operation of the conveyor belt, the conveyor belt can be controlled to run at a low speed to reduce the inertia when the rewinding stops, so as to ensure that the distance between the tail of the target electrode and the outlet of the coating mechanism after rewinding is consistent with the preset electrode spacing to the greatest extent.

[0081] In general, the embodiments of the present application ensure that the electrode can be seamlessly connected when it is reconnected to the production line by precisely controlling the stop position and rewinding strategy of the coating process, thereby avoiding battery cell defects caused by poor splicing, such as coating breakage and uneven thickness. This improvement directly improves the overall quality of the battery cell and effectively increases the quality rate of the battery cell, that is, the proportion of qualified products, which wins higher customer satisfaction and market competitiveness for the company. The solution to the problem of poor splicing not only reduces the materials and energy consumed by remaking waste products, but also avoids the loss of production capacity caused by frequent shutdowns and debugging of the production line. In the long run, this greatly reduces production costs, improves production efficiency, and creates more considerable economic benefits for the company.

[0082] Furthermore, automated shutdown, rewinding, and re-splitting processes reduce the risk of human error and improve the stability and reliability of the production line. Even in the event of an unexpected shutdown, production can be quickly resumed, ensuring smooth execution of production plans and providing a strong guarantee for maintaining a stable production rhythm.

[0083] The embodiments of this application achieve precise management of the electrode position during the coating process. This highly integrated process control capability enables companies to flexibly adjust production parameters when dealing with electrodes of different specifications and materials, ensuring a smooth production process and steadily improving product quality.

[0084] Overall, solving the problem of poor tape splicing in the subsequent process caused by shutdown in the coating process not only directly improves the quality rate of battery cells, but also brings multiple advantages such as reducing production costs, enhancing production stability, improving process control capabilities, and promoting technological innovation and upgrading.

[0085] In one embodiment, a coating control device for a coating machine is provided, wherein the coating machine includes a coating mechanism and a conveyor belt, wherein the coating mechanism is used to coat the slurry on the substrate to form a coated electrode; the conveyor belt is used to carry and convey the coated electrode; Figure 5 As shown, the apparatus 500 includes: An acquisition module 501 is used to acquire the distance between the tail of the target electrode piece and the coating mechanism outlet before controlling the coating mechanism to start continuous coating, wherein the target electrode piece is the electrode piece on the conveyor belt closest to the coating mechanism outlet, and the tail is the portion of the target electrode piece closest to the coating mechanism outlet; A determination module 502 is configured to use the difference between the distance length and a preset pole piece spacing as a target displacement; The control module 503 is used to control the conveyor belt carrying the target electrode to rewind according to the target displacement, so that the preset electrode interval is maintained between the electrode output by the coating mechanism after the coating is continued and the target electrode.

[0086] In one embodiment, the coating machine also includes a detection device for detecting the loading plane of the conveyor belt, and the acquisition module is used to: control the rewinding operation of the conveyor belt when the detection point of the detection device on the conveyor belt is between the outlet of the coating mechanism and the tail of the target pole piece; during the rewinding process, determine whether the detection device has detected the tail of the target pole piece based on the signal returned by the detection device; when the detection device detects the tail of the target pole piece, use the distance between the detection point of the detection device on the conveyor belt and the outlet of the coating mechanism as the distance between the tail of the target pole piece and the outlet of the coating mechanism.

[0087] In one embodiment, the signal includes a first type of signal returned when the detection device detects the pole piece, or a second type of signal returned when the detection device does not detect the pole piece, and the acquisition module is used to: when the signal returned by the detection device changes from the second type of signal to the first type of signal, determine that the detection device has detected the tail of the target pole piece.

[0088] In one embodiment, the detection device includes a length measuring optical fiber sensor disposed above the conveyor belt.

[0089] In one embodiment, the device is also used to: in response to a coating machine shutdown instruction, determine whether there is an uncoated substrate in the coating mechanism; if so, adaptively adjust the coating speed of the coating mechanism, and after the coating is completed, control the coating mechanism and the conveyor belt to shut down.

[0090] In one embodiment, the device is further used to: before controlling the conveyor belt to stop, determine whether the detection device is located between the coating mechanism outlet and the tail of the target electrode; if so, control the conveyor belt to stop.

[0091] In summary, the coating control device of the coating machine proposed in the embodiment of the present application first obtains the distance between the tail of the electrode closest to the coating mechanism outlet on the conveyor belt and the coating mechanism outlet before controlling the coating mechanism to start re-coating. The difference between the distance length and the preset electrode spacing is used as the target displacement, and the conveyor belt is controlled to rewind and run to the target displacement and then stop. In this way, after the coating mechanism starts to re-coat, the electrode that is re-coated will maintain the preset electrode spacing with the target electrode. In this way, the coating machine is controlled to automatically rewind and re-coat, so that the coating process maintains a uniform spacing between the electrodes conveyed on the conveyor belt before and after re-coating.

[0092] In one embodiment, a coating machine is provided, such as Figure 6 As shown, the coating machine 600 may include a coating mechanism 601, a conveyor belt 602, and a coating control device 500 as shown in any of the above embodiments.

[0093] In one embodiment, an electronic device is provided, such as Figure 7 As shown, the electronic device 700 includes a memory 701, a processor 702, and a computer program stored in the memory 701 and executable on the processor 702. When the processor 702 executes the computer program, the coating control method for the coating machine described in any of the above embodiments is implemented. Alternatively, when the processor 702 executes the computer program, the functions of the various modules / units in the embodiment of the coating control device for the coating machine are implemented. To avoid repetition, these functions are not described here.

[0094] In one embodiment, a computer-readable storage medium is provided, which stores a computer program. When executed by a processor, the computer program implements the coating control method for a coating machine according to any of the above-described embodiments. Alternatively, when executed by a processor, the computer program implements the functions of the various modules / units in the coating control device for a coating machine according to the embodiment. To avoid repetition, these functions are not further described here.

[0095] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0096] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0097] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A coating control method for a coating machine, characterized in that: The coating machine includes a coating mechanism and a conveyor belt; the coating mechanism is used to coat the slurry on the substrate to form a coated electrode; the conveyor belt is used to carry and convey the coated electrode; the method includes: Before controlling the coating mechanism to start continuous coating, obtaining the distance between the tail of the target electrode piece and the outlet of the coating mechanism, wherein the target electrode piece is the electrode piece on the conveyor belt closest to the outlet of the coating mechanism, and the tail is the portion of the target electrode piece closest to the outlet of the coating mechanism; The difference between the distance length and the preset pole piece spacing is used as the target displacement; According to the target displacement, the conveyor belt carrying the target electrode is controlled to rewind so that the preset electrode interval is maintained between the electrode output after the coating mechanism continues to coat and the target electrode.

2. The method according to claim 1, wherein The coating machine further includes a detection device for detecting the loading plane of the conveyor belt, and the method for obtaining the distance between the tail of the target electrode and the outlet of the coating mechanism includes: When the detection point of the detection device on the conveyor belt is located between the coating mechanism outlet and the tail of the target electrode, controlling the conveyor belt to rewind; During the rewinding process, determining whether the detection device has detected the tail of the target pole piece based on the signal returned by the detection device; When the detection device detects the tail of the target pole piece, the distance between the detection point of the detection device on the conveyor belt and the coating mechanism outlet is used as the distance between the tail of the target pole piece and the coating mechanism outlet.

3. The method according to claim 2, wherein The signal includes a first type of signal returned when the detection device detects a pole piece, or a second type of signal returned when the detection device does not detect a pole piece. Determining, based on the signal returned by the detection device, that the detection device has detected the tail of the target pole piece includes: When the signal returned by the detection device changes from the second type of signal to the first type of signal, it is determined that the detection device has detected the tail of the target pole piece.

4. The method according to claim 2 or 3, wherein: The detection device includes a length measuring optical fiber sensor arranged above the conveyor belt.

5. The method according to any one of claims 1 to 3, wherein The method further comprises: In response to a coating machine stop instruction, determining whether there is an uncoated substrate in the coating mechanism; If it exists, the coating speed of the coating mechanism is adaptively adjusted, and after the coating is completed, the coating mechanism and the conveyor belt are controlled to stop.

6. The method according to claim 2, wherein The method further comprises: Before controlling the conveyor belt to stop, determining whether the detection device is located between the coating mechanism outlet and the tail of the target electrode; If so, the conveyor belt is controlled to stop.

7. A coating control device for a coating machine, characterized in that: The coating machine includes a coating mechanism and a conveyor belt; the coating mechanism is used to coat the slurry on the substrate to form a coated electrode; the conveyor belt is used to carry and transport the coated electrode; the device includes: an acquisition module, configured to acquire the distance between the tail of a target electrode piece and an outlet of the coating mechanism before controlling the coating mechanism to start continuous coating, wherein the target electrode piece is the electrode piece on the conveyor belt closest to the outlet of the coating mechanism, and the tail is the portion of the target electrode piece closest to the outlet of the coating mechanism; a determination module, configured to use the difference between the distance length and a preset pole piece spacing as a target displacement; The control module is used to control the conveyor belt carrying the target electrode to rewind according to the target displacement, so that the preset electrode spacing is maintained between the electrode output after the coating mechanism continues to coat and the target electrode.

8. A coating machine, characterized in that: include: A coating mechanism, a conveyor belt, and a coating control device for a coating machine as claimed in claim 7.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the coating control method of the coating machine according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the coating control method of the coating machine according to any one of claims 1 to 6 is implemented.

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