A roll-to-roll membrane electrode packaging method and system

Abstract

The present application relates to the technical field of fuel cell, and particularly relates to a roll-to-roll membrane electrode packaging method and system. The method comprises the following steps: identifying an active area opening feature of a first frame, and calculating a geometric center line; comparing the geometric center line with a preset reference center line to obtain a first deviation; correcting the deviation in the width direction according to the first deviation, so that the first frame is within the allowable deviation; calculating a geometric center line of a second frame, and obtaining a measured center line of the first frame before entering the packaging, and comparing the two to obtain a second deviation; controlling the position of the second frame in the width direction and the cutting time according to the second deviation, so that the relative center line deviation between the second frame and the first frame is within the allowable deviation; identifying a feature coordinate of a catalyst coating film, calculating a geometric center line, and positioning and correcting after comparison with the reference center line; and pressing and packaging the first frame, the second frame and the catalyst coating film. Through the method, the tolerance accumulation is reduced, and the packaging precision is improved.

Description

Technical Field

[0001] This invention relates to the field of fuel cell technology, and in particular to a roll-to-roll membrane electrode packaging method and system. Background Technology

[0002] In the field of fuel cell manufacturing, membrane electrode assembly (MEA) encapsulation is involved. MEA assemblies in proton exchange membrane fuel cells are typically produced continuously using a roll-to-roll process. A typical structure is a five-in-one MEA, consisting of a catalyst-coated membrane (CCM) and frame layers on either side of the CCM. During encapsulation, the upper and lower frame layers must be precisely aligned and pressed with the central CCM according to the design position to ensure product performance and consistency in subsequent stack assembly.

[0003] In commonly used roll-to-roll packaging methods, alignment in the tape transport direction is based on the features of the first frame. The CCM and second frame are positioned and cut respectively, and alignment of the three is achieved by controlling the cutting time. Alignment in the width direction uses an edge detection method. A fixed positioner identifies the tape transport edge, and when the edge deviates from the reference position, the controller drives the correction device to pull the tape transport back to the reference position. In other words, the first frame, second frame, and CCM all use one edge of the tape transport as the alignment reference in the width direction.

[0004] The aforementioned positioning method, which uses a single edge as a reference, results in an asymmetrical tolerance distribution. When using one side of the first frame as the reference, the tolerance chain on the reference side is shorter and the tolerance is smaller. However, on the non-reference side, the tolerances from the first frame to the edge, the second frame to the edge, and other links need to be superimposed sequentially, resulting in a long tolerance chain and a large cumulative amount. Furthermore, the frame edge itself is formed by cutting, introducing cutting tolerances and burrs, further reducing alignment accuracy. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a roll-to-roll film electrode packaging method that can reduce tolerance accumulation and improve packaging accuracy.

[0006] To achieve the above objectives, the embodiments of the present invention provide the following technical solutions: In a first aspect, embodiments of the present invention provide a roll-to-roll film electrode encapsulation method, comprising the following steps: identifying the active area opening features of a first frame and calculating its geometric center line; comparing the geometric center line of the first frame with a preset reference center line to obtain a first deviation; correcting the deviation in the width direction according to the first deviation, so that the geometric center line of the first frame is within the allowable deviation; calculating the geometric center line of a second frame and obtaining the measured center line of the first frame before encapsulation, comparing the two to obtain a second deviation; controlling the width direction position and cutting time of the second frame according to the second deviation, so that the relative center line deviation between the second frame and the first frame is within the allowable deviation; identifying the characteristic coordinates of the catalyst coating film, calculating the geometric center line of the catalyst coating film, and correcting the deviation after comparing it with the reference center line; and pressing the corrected first frame, second frame, and catalyst coating film together to form a film electrode.

[0007] As a further technical solution, the active area opening feature is the edge line or corner point of the active area opening on the border.

[0008] As a further technical solution, when calculating the geometric center line, multiple feature groups are identified, each feature group contains multiple features, and the geometric center line is obtained by fitting the coordinates of the center points of each feature.

[0009] As a further technical solution, the second frame is made by online cutting. When controlling the cutting time, the starting cutting time of each second frame is corrected according to the second deviation.

[0010] As a further technical solution, the correction of the catalyst coating film includes: identifying the coordinates of identifiable feature points on the catalyst coating film, fitting the geometric center line and comparing it with the reference center line, and adjusting the position of the catalyst coating film in the width direction according to the deviation.

[0011] As a further technical solution, the positioning of the first frame, the second frame, and the catalyst coating film includes initial positioning, positioning during the conveyor belt process, and pre-packaging positioning before entering the packaging pressure roller. The actual measured centerline coordinates of each are calculated and it is determined whether the deviation is within the allowable deviation.

[0012] As a further technical solution, the initial positioning and pre-packaging positioning detection checks whether the width direction deviation and the tape feeding direction deviation are within the allowable deviation, and the tape feeding process positioning detection checks whether the width direction deviation is within the allowable deviation.

[0013] Secondly, embodiments of the present invention also provide a packaging system for the above-described roll-to-roll film electrode packaging method, comprising: A coordinate reading system is used to identify the characteristic coordinates on the border or catalyst coating film; The controller, connected to the coordinate reading system, is used to fit the geometric center line based on the feature coordinates and compare the geometric center line with the reference center line to obtain the deviation signal. A correction actuator, connected to a controller, is used to adjust the position of the frame or catalyst coating film in the width direction according to the deviation signal. The frame manufacturing system processes frame materials into frames that meet dimensional requirements.

[0014] As a further technical solution, the frame manufacturing system also includes a position closed-loop control system or an online manufacturing system; An online manufacturing system is used for online cutting and manufacturing of borders. The online manufacturing system includes a cutting blade system, a first coordinate reading system, a first controller, and a first correction driver. In the online manufacturing system, the first controller is connected to both the cutting blade system and the first correction driver. The first controller corrects the cutting time of the cutting blade system based on the feature deviation detected by the first coordinate reading system, and simultaneously drives the first correction driver to move. The position closed-loop control system is used for real-time correction of the already formed frame or catalyst coating film during the conveyor process. The position closed-loop control system includes a second coordinate reading system, a second controller, and a second correction driver. In the position closed-loop control system, the second controller is connected to the second correction driver. The second controller drives the second correction driver to move according to the deviation between the feature coordinates identified by the second coordinate reading system and the reference value.

[0015] As a further technical solution, the active area opening feature identified by the coordinate reading system is the corner point or edge line of the active area opening in the border.

[0016] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: The packaging method of this invention uses the active area opening feature to calculate the geometric center line, replacing the traditional single-sided edge reference. This shifts the positioning reference from the edge of the frame to the active area opening, whose accuracy is guaranteed by the mold, fundamentally eliminating the interference of frame cutting tolerances and edge burrs on positioning. Furthermore, by comparing the geometric center line with the reference center line for correction, center positioning is achieved, ensuring symmetrical tolerance distribution and avoiding cumulative errors caused by tolerance chain lengths on non-reference sides. Additionally, the second frame is positioned relative to the measured center line of the first frame before packaging, rather than as an absolute reference. This allows the second frame to follow the systematic offset of the first frame, ensuring the relative symmetry of the two frames. Dynamic compensation is achieved by controlling the width position and cutting time of the second frame, eliminating cumulative errors in roll-to-roll continuous production. Therefore, this method ensures that packaging accuracy depends only on real-time correction capability, no longer affected by material size tolerances and the superposition of tolerances from multiple stages, solving the problem of large cumulative tolerances and low packaging accuracy in roll-to-roll packaging production lines caused by non-center positioning.

[0017] Advantages of additional aspects of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In addition, the dimensions or spacing between the components are exaggerated to show the position of each component, and the schematic diagrams are for illustrative purposes only.

[0019] Figure 1 This is a CCM structure diagram; Figure 2 This is a diagram of a five-in-one membrane electrode structure; Figure 3 It is a standard conveyor direction encapsulation logic diagram; Figure 4 It is a standard wide-width directional correction diagram; Figure 5 This is a simplified production line diagram; Figure 6 This is a schematic diagram of conventional membrane electrode alignment; Figure 7 This is a schematic diagram of a standard asymmetric tolerance. Figure 8 This is a schematic diagram of the first border to the edge within a standard tolerance zone; Figure 9 This is a schematic diagram of the border features provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the fitting of the border centerline provided in an embodiment of the present invention; Figure 11 This is a schematic diagram of the border correction provided in an embodiment of the present invention; Figure 12 This is the execution logic diagram provided in the embodiments of the present invention; Figure 13 This is a CCM positioning flowchart provided in an embodiment of the present invention; Figure 14 This is a flowchart of the first border positioning provided in an embodiment of the present invention; Figure 15 This is a flowchart of the second border positioning provided in an embodiment of the present invention.

[0020] In the figure: 1. First catalyst layer; 2. Membrane; 3. Second catalyst layer; 4. Catalyst coating membrane; 5. First frame; 6. Second frame. Detailed Implementation

[0021] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the linguistic context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0022] Generally speaking, the terms "comprising" and "including" only indicate that the steps and elements are explicitly identified, and these steps and elements do not constitute an exclusive list. The method or apparatus may also include other steps or elements.

[0023] Example 1 Catalyst Coated Film 4 (CCM): such as Figure 1 The structure is formed by coating both sides of the membrane 2 with a cathode catalytic layer (first catalytic layer 1) and an anode catalytic layer (second catalytic layer 3).

[0024] Five-in-one membrane electrode: such as Figure 2 The membrane electrode assembly is formed by encapsulating a catalyst-coated membrane 4 with two frames (first frame 5 and second frame 6).

[0025] like Figure 5 The diagram shown is a simplified production line diagram. Different positioning methods are used for the regular conveyor belt direction and the wide-width direction. like Figure 3 As shown, the alignment in the conventional conveyor direction adopts the following mode: with the feature of the first frame 5 as the reference, the CCM and the second frame 6 are positioned and positioned and cut respectively (by controlling the cutting time), so as to realize the encapsulation alignment of the first frame 5, the second frame 6 and the CCM. The alignment accuracy of the encapsulation is adjusted by the CCM positioning compensation and the compensation of the frame cutting time.

[0026] like Figure 4 As shown, the conventional alignment in the wide direction uses the following mode: a positioner is fixed to identify the edge of the conveyor belt. When the positioner detects that the edge deviates from the reference position, it sends a signal to the controller. The controller outputs a command to the correction driver, which offsets the conveyor belt to the reference position by a certain position. The first frame 5, the second frame 6, and the CCM all use this positioning method.

[0027] like Figure 6 As shown, the alignment of the first border 5 with the second border 6, and the CCM with the first border 5, is based on one side of the first border 5's tape position. This results in an asymmetrical tolerance distribution, with fewer tolerance components and smaller tolerances on the reference side, and more tolerance components and larger tolerances on the non-reference side. Figure 7The distance between the first frame 5 on the reference side and the CCM consists of two tolerances, while the distance between the first frame 5 on the non-reference side and the CCM consists of four tolerances.

[0028] The alignment tolerance zone contains tolerances from the first border 5 to the edge and from the second border 6 to the edge, which reduces alignment accuracy. For example... Figure 8 As shown, the distance tolerance between the first frame 5 and the CCM on the reference side consists of the tolerance from the first frame 5 to the edge and the alignment tolerance between the first frame 5 and the CCM. When the reference is changed to the inside of the first frame 5, the distance between the first frame 5 and the CCM on the reference side consists only of the alignment tolerance between the first frame 5 and the CCM.

[0029] To address the issues of large cumulative tolerances and low packaging accuracy caused by non-central positioning in roll-to-roll packaging production lines, a typical embodiment of this disclosure provides a roll-to-roll film electrode packaging method, comprising the following steps: Identify the active area opening features of the first frame 5 and calculate the geometric center line; compare the geometric center line of the first frame 5 with the preset reference center line to obtain the first deviation; correct the deviation in the width direction according to the first deviation so that the geometric center line of the first frame 5 is within the allowable deviation. Calculate the geometric center line of the second frame 6 and obtain the measured center line of the first frame 5 before it enters the packaging. Compare the two to obtain the second deviation. Control the width direction position and cutting time of the second frame 6 according to the second deviation so that the relative center line deviation between the second frame 6 and the first frame 5 is within the allowable deviation. Identify the characteristic coordinates of the catalyst coating film 4, calculate the geometric center line of the catalyst coating film 4, and then position and correct it by comparing it with the reference center line. The corrected first frame 5 and second frame 6 are pressed and encapsulated with the catalyst coating film 4 to form a membrane electrode.

[0030] like Figure 9 As shown, the active zone opening feature refers to the characteristic structure of the opening area cut out on the frame, such as the edge or corner of the opening, rather than the outer edge of the frame. The active zone opening feature is chosen because this opening directly corresponds to the working area of ​​the catalyst coating film 4. Of course, it is understandable that other features with a fixed distance from the frame could also be used.

[0031] The geometric centerline is calculated based on the coordinates of multiple identified feature points. Specifically, it is a centerline fitted by the coordinates of feature points in both the conveyor direction and the width direction, rather than simply taking the edge line. The preset reference centerline is an ideal centerline pre-set in the system, typically corresponding to the mechanical centerline of the packaging station or the target position required by the process. Tolerance refers to the range of positional deviations allowed in the process; deviations exceeding this range are considered non-conforming.

[0032] In terms of specific implementation, identifying the opening features of the active area can be accomplished using an optical coordinate reading system. For example, a CCD camera combined with image processing algorithms can be used to capture the coordinates of the corner points or edges of the opening. When calculating the geometric center line, the coordinate values ​​of multiple feature points can be collected, and then a center line can be fitted using algorithms such as the least squares method. The width direction refers to the direction perpendicular to the conveyor belt direction, that is, the transverse direction of the material. The correction action is executed by a correction driver, which can be a displacement platform driven by a stepper motor or a servo motor.

[0033] Taking the positioning of the first frame 5 as an example, the edge line or corner point of its active area opening is first identified, and the geometric center line of the frame is calculated. This center line is compared with the system's preset reference center line. If a deviation exists, the correction mechanism in the width direction is driven to move until the center line is within the allowable deviation range. This achieves positioning based on the center of the frame's active area, rather than on a single edge. Compared to traditional methods, this center positioning avoids alignment errors introduced by the tolerance of the frame's trimming edge.

[0034] The second frame 6 is aligned with the measured center line of the first frame 5 before encapsulation. First, the geometric center line of the second frame 6 is calculated, and simultaneously, the measured center line coordinates of the first frame 5 before entering the encapsulation roller are obtained. The two are compared to obtain a second deviation. Based on this deviation, the width position of the second frame 6 is controlled, as is the cutting time of the second frame 6. The advantage of this relative positioning method is that even if the first frame 5 has a systematic positional offset, the second frame 6 can follow the offset, thus ensuring the relative symmetry of the two frames and the intermediate catalyst coating film 4. Of course, it is understandable that in other embodiments, the second frame 6 can also be positioned by aligning it with a fixed mechanical reference center line.

[0035] The characteristic coordinates of the catalyst coating film 4 can be identifiable markers on the catalyst coating film 4 or features corresponding to the openings of the active region on the border. After calculating the geometric center line of the catalyst coating film 4, it is compared with the reference center line and positioning correction is performed.

[0036] Finally, the first frame 5, the second frame 6, and the catalyst coating film 4, after undergoing the above-mentioned multiple positioning and correction processes, are pressed and encapsulated to form a five-in-one structure.

[0037] The center positioning of the first frame 5 eliminates edge tolerances, the relative positioning of the second frame 6 eliminates the overall offset of the first frame 5, and the center positioning correction of the catalyst coating film 4 ensures its position relative to the reference. The combination of these three factors ensures that the alignment accuracy of the final packaged product depends primarily on the real-time detection and correction capabilities of each stage, rather than on the dimensional accuracy of the raw materials and the accumulation of tolerances from multiple stages. This solves the problems of asymmetric tolerance accumulation and the mixing of frame-to-edge tolerances into the alignment tolerance chain.

[0038] In some further specific examples of this disclosure, the active area opening feature is the edge line or corner point of the active area opening on the border.

[0039] like Figure 10 As shown, the active area opening on the frame is typically a rectangular or similarly shaped cutout area used to accommodate the catalyst coating film 4. The edges or corners of this opening have well-defined geometric positions, making them easily captured by an optical recognition system. Compared to using the outer edge of the frame as a positioning reference, utilizing the edges or corners of the active area opening allows the alignment reference to directly reflect the position of the functional area, avoiding interference from frame edge cutting tolerances and burrs. In other embodiments, other feature structures within the active area opening can also be used, as long as the structure has a fixed geometric relationship with the active area opening.

[0040] In other specific examples of this disclosure, when calculating the geometric centerline, multiple feature groups are identified, each containing multiple features, and the geometric centerline is obtained by fitting the coordinates of the center points of each feature.

[0041] By collecting the coordinates of multiple feature points, calculating the center point of each feature group, and then fitting a straight line to these center points as the geometric center line, this multi-point fitting method can reduce the impact of single-point recognition errors or local deformations, and improve the robustness of the center line.

[0042] like Figure 10 The diagram illustrates two feature groups in the width direction and one feature group in the travel direction. In practical applications, the number of feature groups can be increased as needed. The fitting algorithm can employ the least squares method or methods such as averaging. Figure 11 As shown, the fitted center line is compared with the reference center line, and the fitting center line is corrected to make the fitting center line coincide with the reference center line or the deviation reaches the allowable deviation.

[0043] In some specific examples disclosed herein, the second border 6 is made by online cutting, and when controlling the cutting time, the starting cutting time of each second border 6 is corrected according to the second deviation.

[0044] Online cutting refers to the continuous feeding of the frame material on the packaging equipment, while a cutting system cuts the material into individual frame pieces according to a set cycle. Traditional cutting methods cut at fixed time intervals or to fixed lengths, without adjusting based on the actual position. In this method, the starting cutting time of each second frame piece 6 is corrected based on a second deviation. Specifically, if a shift in the feeding direction of the current position of the second frame piece 6 relative to the first frame piece 5 is detected, the controller issues a cutting command earlier or later, ensuring that the cut frame piece is perfectly aligned with the first frame piece 5 in the feeding direction. This correction is not a mechanical adjustment of the cutting blade frequency, but rather a dynamic compensation based on real-time detected deviation.

[0045] In other specific examples of this disclosure, the correction of the catalyst coating film 4 includes: identifying the coordinates of identifiable feature points on the catalyst coating film 4, fitting the geometric center line and comparing it with the reference center line, and adjusting the position of the catalyst coating film 4 in the width direction according to the deviation.

[0046] The identifiable feature points on the catalyst coating film 4 can be specific patterns, pre-printed positioning marks, or relatively clear parts. After identifying multiple feature points, a geometric center line is fitted using a method similar to that used for borders, and then compared with a reference center line. The position of the catalyst coating film 4 in the width direction is adjusted according to the deviation.

[0047] In other specific examples of this disclosure, the positioning of the first frame 5, the second frame 6 and the catalyst coating film 4 includes initial positioning, positioning during the conveyor belt process and pre-encapsulation positioning before entering the encapsulation pressure roller, respectively calculating their measured centerline coordinates and determining whether the deviation is within the allowable deviation.

[0048] Initial positioning refers to the position calibration performed on the material after loading and before continuous production begins. For the first frame 5, if an independent frame manufacturing system is used, the initial correction model is invoked by the position closed-loop control system after loading onto the packaging equipment for correction; if an online manufacturing system is used, the frame with the initial position meeting the requirements is manufactured using the online manufacturing model. For the second frame 6, initial positioning is completed during the online manufacturing process by correcting the cutting time and width correction. For the catalyst coating film 4, initial positioning is also completed through a closed-loop control system.

[0049] Belt conveyor positioning refers to the process of monitoring and adjusting the position of materials in the width direction in real time during continuous production by setting up one or more closed-loop control systems to compensate for drift caused by material offset, equipment vibration, etc. during belt conveyor operation.

[0050] Pre-packaging positioning refers to the final position detection performed just before the material enters the packaging roller. At this time, the measured center line coordinates of the first frame 5, the second frame 6, and the catalyst coating film 4 are calculated and compared with the corresponding reference to determine whether the deviation is within the allowable deviation.

[0051] Initial positioning provides an initial reference for the materials, preventing large positional deviations during the startup phase. Positioning during the conveyor belt process is corrected in real-time during continuous production, preventing small deviations from accumulating into large ones. Pre-packaging positioning serves as the final check, ensuring that every piece of product entering the lamination process meets accuracy requirements. These three elements form a progressive position control chain, jointly guaranteeing packaging accuracy from the source, process, and end points. This addresses the unavoidable dynamic drift in roll-to-roll production, improving product consistency and yield.

[0052] In other specific examples of this disclosure, the initial positioning and pre-packaging positioning detect whether the width direction deviation and the conveyor direction deviation are within the allowable deviation, and the conveyor process positioning detects whether the width direction deviation is within the allowable deviation.

[0053] Initial positioning and pre-packaging positioning require simultaneous detection in two directions: the width direction and the conveyor belt direction. This is because deviations may occur in both directions at the beginning of material loading or just before packaging, necessitating a comprehensive check. For example, during initial positioning, the controller identifies characteristic coordinates through a coordinate reading system, calculates the coordinate sets of the center point in the conveyor belt direction and the center point in the width direction, compares them with the corresponding references to obtain the deviations in the conveyor belt direction and width direction, and then drives the correction mechanisms in both directions to make adjustments. Pre-packaging positioning also requires simultaneous detection in both directions to confirm whether the final position is acceptable.

[0054] This technical solution simultaneously detects the width and conveyor direction deviations during initial positioning and pre-packaging positioning, while only detecting the width deviation during the conveyor process. This can significantly improve the alignment accuracy, control stability, and production efficiency of roll-to-roll packaging, and enhance technological innovation.

[0055] Initial positioning and pre-packaging positioning, both in both directions, enable dual-directional detection to pinpoint the material's reference position from the outset and complete final calibration before packaging, preventing the accumulation of deviations in both directions and ensuring accurate center positioning. During the conveyor belt process, only the width direction is controlled, with real-time closed-loop correction suppressing deviations. Deviations in the conveyor belt direction can be compensated for once during online cutting, eliminating the need for repeated in-process detection and correction. This differentiated detection strategy reduces redundant control steps, simplifies system logic, and lowers computational load, while accurately eliminating asymmetric tolerances and accumulated errors, improving packaging consistency. Compared to full-process dual-directional detection, it is more efficient and better suited for dynamic continuous production.

[0056] First border 5 positioning: Initial Positioning of the First Frame 5: The first frame 5 can be manufactured in two ways. The first is through an independent frame manufacturing system, and the second is through an online manufacturing system. If the first method is used, after the first frame 5 is manufactured and loaded onto the packaging equipment, before continuous production, the position closed-loop control system uses the controller to call the initial correction model to correct the position of the first frame 5, ensuring accurate initial positioning. If the second manufacturing method is used, the frame material is loaded onto the packaging equipment, and the first frame 5 is manufactured using an online manufacturing system, with the controller calling the online manufacturing model to create a frame with the required initial position.

[0057] Positioning of the first frame 5 during the conveyor belt process: By setting one or more closed-loop control systems, the position of the frame in the width direction is controlled.

[0058] First frame 5 pre-encapsulation positioning: Before the upper frame enters the encapsulation pressure roller, the coordinates (Fx, Fy) of the frame features are identified by the coordinate reading system, and the deviation (ΔFx, ΔFy) from the reference value is calculated.

[0059] (2) Border positioning: Initial positioning of the second frame 6: The second frame 6 is fabricated online on the packaging equipment using an online fabrication system. The initial cutting time t for each piece is corrected in two modes (Δt). The controller receives two inputs: one is reading the coordinates Fx of the first frame 5, and the other is the deviation {x} between the centerline coordinates calculated based on the characteristic coordinates of the second frame 6 and the reference value. m}

[0060] Positioning of the second frame 6 during the conveyor belt process: By setting one or more closed-loop control systems, the position of the frame in the width direction is controlled.

[0061] Second frame 6 pre-encapsulation positioning: Before the upper frame enters the encapsulation pressure roller, the coordinates (Fx, Fy) of the frame features are identified by the coordinate reading system, and the deviation (ΔFx, ΔFy) from the reference value is calculated.

[0062] (3) CCM initialization: CCM initial positioning: The CCM feeding is initially positioned through the closed-loop control system.

[0063] CCM conveyor positioning: By setting up one or more closed-loop control systems, the position of the frame in the width direction is controlled.

[0064] Pre-packaging positioning of CCM: Before entering the packaging roller, CCM identifies the coordinates (Fx, Fy) of the edge features through a coordinate reading system and calculates the deviation (ΔFx, ΔFy) from the reference value.

[0065] The above steps require determining whether the deviation value exceeds the allowable deviation. If it does, the model needs to be retrained. If it does not exceed the allowable deviation, proceed to the next step.

[0066] (4) The first border 5, the second border 6, and the CCM are encapsulated, so that the CCM and the first border 5 and the second border 6 are combined to form a five-in-one structure.

[0067] After packaging, determine whether the packaging accuracy meets the requirements. If it does not meet the requirements, the model needs to be retrained. If it does meet the requirements, the packaging of the five-in-one product is completed.

[0068] The specific process is as follows: Figure 12 As shown: Step 1: Position the first border 5, as follows Figure 14 As shown.

[0069] Step 11: Initial positioning of the first border 5: Read the feature coordinates and calculate the deviation {Δx} between the centerline coordinates and the reference value. m} and {Δy m}; Call the initial closed-loop control model or create a model online, and move the correction actuators Δx′ and Δy′; Update {Δx m} and {Δy m}

[0070] Decision: {Δx} m} and {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 11 to repeat; Yes → Proceed to step 12.

[0071] Step 12: Positioning of the first frame 5 during the conveyor belt process (one or more position closed-loop control systems): Read the feature coordinates and calculate the deviation {Δy} between the centerline coordinates and the reference value. m}; Invoke the closed-loop control model, the correction actuator moves Δy′; Update {Δy} m}

[0072] Judgment: {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 12 to repeat; Yes → Proceed to step 13.

[0073] Step 13: Positioning of the first frame 5 before encapsulation: Read the feature coordinates, calculate the centerline coordinates {Fx} and {Fy}; and the deviation from the reference value {ΔFx}. m} and {ΔFy m}

[0074] Judgment: {ΔFx m} and {ΔFy mIs it within the allowable deviation? No → Retrain the model and return to step 13 to repeat; Yes → Proceed to step 14.

[0075] Step 2: Position the second border 6, as follows Figure 15 As shown.

[0076] Step 21: Initial positioning of the second border 6: Read the feature coordinates and calculate the deviation {Δx} between the centerline coordinates and the reference value. m} and {Δy m}; Invoke the online model, move the correction driver Δy′, and correct Δt at the cutting time t; Update {Δx} m} and {Δy m}

[0077] Decision: {Δx} m} and {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 21 to repeat; Yes → Proceed to step 22.

[0078] Step 22: Positioning of the second frame 6 conveyor belt (one or more position closed-loop control systems): Read the feature coordinates and calculate the deviation {Δy} between the centerline coordinates and the reference value. m}; Invoke the closed-loop control model, the correction actuator moves Δy′; Update {Δy} m}

[0079] Judgment: {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 22 to repeat; Yes → Proceed to step 23.

[0080] Step 23: Positioning of the second frame 6 before encapsulation: Read the feature coordinates and calculate the deviation {Δx} between the centerline coordinates and the reference value. m} and {Δy m}

[0081] Decision: {Δx} m} and {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 23 to re-execute; Yes → Proceed to the common packaging process.

[0082] Step 3: CCM positioning, such as Figure 13 As shown.

[0083] Step 31: Initial CCM localization: Read the feature coordinates and calculate the deviation {Δx} between the centerline coordinates and the reference value. m} and {Δy m}; Invoke the initial closed-loop control models Δx′ and Δy′; Update {Δx m} and {Δy m}

[0084] Decision: {Δx} m} and {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 31 to repeat; Yes → Proceed to step 32.

[0085] Step 32: CCM conveyor process positioning (one or more position closed-loop control systems): Read the feature coordinates and calculate the deviation {Δy} between the centerline coordinates and the reference value. m}; Invoke the closed-loop control model, the correction actuator moves Δy′; Update {Δy} m}

[0086] Judgment: {Δy m Is it within the allowable deviation? No → Retrain the model and return to step 32 to repeat; Yes → Proceed to step 33.

[0087] Step 33: Positioning before CCM packaging: Read the feature coordinates, calculate the centerline coordinates {Fx} and {Fy}; and the deviation from the reference value {ΔFx}. m} and {ΔFy m}

[0088] Judgment: {ΔFx m} and {ΔFy m Is it within the allowable deviation? No → Retrain the model and return to step 33 to re-execute; Yes → Proceed to the common packaging process.

[0089] It should be noted that steps 1, 2, and 3 are used for clarity, but there is no requirement for a specific order; they can be performed simultaneously.

[0090] Step 4: Co-encapsulation.

[0091] The first frame 5 and the second frame 6 are pressed and encapsulated with CCM.

[0092] Judgment: Does the packaging accuracy meet the requirements? No → Retrain all models and return to the initial positioning steps of each branch to re-execute; Yes → Complete the product.

[0093] Example 2 This embodiment provides a packaging system for the roll-to-roll film electrode packaging method of Embodiment 1, comprising: Coordinate reading system: It has the function of locating border features.

[0094] Controller: Used to process the data from the coordinate reading system, calculate the deviation between the coordinates and the reference value, calculate the correction value through the model, and send instructions to the correction driver.

[0095] Correction driver: It can receive instructions from the controller and move the frame and CCM in the width direction with high precision.

[0096] Frame manufacturing system: The incoming materials are frame raw materials and auxiliary materials. The system can cut the active area of ​​the frame and remove waste material from the active area to obtain the finished frame. This system can only have belt feeding and correction, or it can improve the positional accuracy of the manufactured frame through a position closed-loop control system or an online manufacturing system.

[0097] Position closed-loop control system: includes coordinate reading system, controller, and correction drive. It identifies the features of the frame / catalyst coating film 4, and uses the coordinate reading system to identify the feature coordinate set {(x...}} of the frame. m,n y m,n This includes m feature groups, each with n features, where n, m = 1, 2, 3... The controller uses the feature coordinates of the bounding box {(x...)} to... m,n y m,n )} Calculate the coordinate set of the center point of the running belt direction {x m} is used as the coordinate of the geometric center line, and the value of {Sx} relative to the corresponding reference coordinate point is calculated. m The set of deviation coordinates {Δx} m}; Calculate the coordinate set of the center point {y} in the width direction. m} is used as the coordinate of the geometric center line, and the numerical values ​​of the corresponding reference coordinate points are calculated. m The set of deviation coordinates {Δy} m The controller transmits instructions to the belt-walking and width-direction correction drives. The belt-walking correction drive moves Δx', and the width-direction correction drive moves Δy', to change the border / catalyst coating film 4-feature {(x m,n y m,n )} coordinates, until the coordinate deviation {Δx m} and {Δy m Within the allowable deviation. The controller has a self-learning function, which can adjust {Δx} m} and Δx', {Δy m The model is associated with Δy', and the controller uses this model to achieve precise and rapid border positioning, which is called a closed-loop control model. Depending on the needs, closed-loop position control can be performed only in the conveyor belt direction or in the wide-area direction.

[0098] The online fabrication system includes a cutting blade system, a coordinate reading system, a controller, and a web guiding actuator. The border / catalyst coating film 4 is fabricated online by the cutting blade system. For the belt feed direction, the controller controls the cutting blade to perform the cutting from time t, and the coordinate reading system detects the coordinates {x} of the fabricated border / catalyst coating film 4. m,n This includes m feature groups, each with n features, where n, m = 1, 2, 3... The controller uses the frame / catalyst coating film's 4 feature coordinates {x...} m,n} Calculate the coordinate set of the center point of the running belt direction {x m} is used as the coordinate of the geometric center line, and the value of {Sx} relative to the corresponding reference coordinate point is calculated. m The set of deviation coordinates {Δx} m The controller modifies the characteristic coordinates {x} by adjusting t by Δt. m,n} coordinates, until the coordinate deviation {Δx} m Within the allowable deviation. For the width direction, the feature coordinate set {y} of the border is identified by the coordinate reading system. m,n This includes m feature groups, each with n features, where n, m = 1, 2, 3... The controller calculates the coordinate set of the center point in the width direction {y...}. m} is used as the coordinate of the geometric center line, and the numerical values ​​of the corresponding reference coordinate points are calculated. m The set of deviation coordinates {Δy} m The controller transmits instructions to the width-direction correction driver, which changes the bounding box feature {y} by moving Δy'. m,n} coordinates, until the coordinate deviation {Δy} m Within the allowable deviation. The controller has a self-learning function, which can adjust {Δx} m} and Δt, {Δy m The model is associated with Δy', and the controller uses the model to achieve accurate and rapid border positioning, which is called online model creation. Width-direction correction is not required.

[0099] While the specific embodiments of the present invention have been described above, they are not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A roll-to-roll film electrode packaging method, characterized in that, Includes the following steps: Identify the active area opening features of the first border and calculate the geometric center line; compare the geometric center line of the first border with the preset reference center line to obtain the first deviation; correct the deviation in the width direction according to the first deviation so that the geometric center line of the first border is within the allowable deviation. Calculate the geometric center line of the second frame and obtain the measured center line of the first frame before it enters the packaging. Compare the two to obtain the second deviation. Control the width direction position and cutting time of the second frame according to the second deviation so that the relative center line deviation between the second frame and the first frame is within the allowable deviation. Identify the characteristic coordinates of the catalyst coating film, calculate the geometric center line of the catalyst coating film, and then position and correct the deviation by comparing it with the reference center line. The corrected first and second borders are pressed and encapsulated with the catalyst coating film to form a membrane electrode.

2. The roll-to-roll film electrode packaging method as described in claim 1, characterized in that, The active area opening feature is the edge line or corner point of the active area opening on the border.

3. The roll-to-roll film electrode packaging method as described in claim 1, characterized in that, When calculating the geometric centerline, multiple feature groups are identified, each containing multiple features. The geometric centerline is obtained by fitting the coordinates of the center points of each feature.

4. The roll-to-roll film electrode packaging method as described in claim 1, characterized in that, The second border is made by online cutting. When controlling the cutting time, the starting cutting time of each second border piece is corrected according to the second deviation.

5. The roll-to-roll film electrode packaging method as described in claim 1, characterized in that, Correcting the deviation of the catalyst coating film includes: identifying the coordinates of identifiable feature points on the catalyst coating film, fitting the geometric center line and comparing it with the reference center line, and adjusting the position of the catalyst coating film in the width direction according to the deviation.

6. The roll-to-roll film electrode packaging method as described in claim 1, characterized in that, The positioning of the first frame, the second frame, and the catalyst coating film includes initial positioning, positioning during the conveyor belt process, and pre-packaging positioning before entering the packaging roller. The actual measured centerline coordinates of each are calculated and it is determined whether the deviation is within the allowable deviation.

7. The roll-to-roll film electrode packaging method as described in claim 6, characterized in that, Initial positioning and pre-packaging positioning checks whether the width direction deviation and the tape feeding direction deviation are within the allowable deviation. During the tape feeding process, positioning checks whether the width direction deviation is within the allowable deviation.

8. A packaging system for the roll-to-roll film electrode packaging method according to any one of claims 1-7, characterized in that, include: A coordinate reading system is used to identify the characteristic coordinates on the border or catalyst coating film; The controller, connected to the coordinate reading system, is used to fit the geometric center line based on the feature coordinates and compare the geometric center line with the reference center line to obtain the deviation signal. A correction actuator, connected to a controller, is used to adjust the position of the frame or catalyst coating film in the width direction according to the deviation signal. The frame manufacturing system processes frame materials into frames that meet dimensional requirements.

9. The packaging system as described in claim 8, characterized in that, The frame fabrication system also includes a position closed-loop control system or an online fabrication system; An online manufacturing system is used for online cutting and manufacturing of borders. The online manufacturing system includes a cutting blade system, a first coordinate reading system, a first controller, and a first correction driver. In the online manufacturing system, the first controller is connected to the cutting blade system and the first correction driver respectively. The first controller corrects the cutting time of the cutting blade system according to the feature deviation detected by the first coordinate reading system, and at the same time drives the first correction driver to move. The position closed-loop control system is used for real-time correction of the already formed frame or catalyst coating film during the conveyor process. The position closed-loop control system includes a second coordinate reading system, a second controller, and a second correction driver. In the position closed-loop control system, the second controller is connected to the second correction driver. The second controller drives the second correction driver to move according to the deviation between the feature coordinates identified by the second coordinate reading system and the reference value.

10. The packaging system as claimed in claim 8, characterized in that, The active area opening features identified by the coordinate reading system are the corner points or edges of the active area opening in the border.

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