Battery cell ID recovery method and manufacturing process system using same

Abstract

The manufacturing process system for controlling a plurality of cell manufacturing processes for assembling a plurality of battery cells may include: a plurality of electronic control devices for controlling the plurality of cell manufacturing processes; an equipment data collection (EDC) server for receiving and storing a plurality of normally recognized cell ID images and a plurality of unirecognized cell ID images that cannot be recognized from the plurality of electronic control devices; and a cell ID recovery unit for recovering, among candidate cell ID images based on a first cell ID position corresponding to a first unidentified cell ID image among the plurality of unidentified cell ID images, a candidate cell ID image most similar to the first unidentified cell ID image to a cell ID of the first unidentified cell ID image. And if the battery cell ID recovery of the first unidentified battery cell ID image fails, the battery cell ID recovery unit can read the first unidentified battery cell ID image again.

Description

Technical Field

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2022-0105227 filed in the Korean Intellectual Property Office on August 23, 2022, the entire contents of which are incorporated herein by reference.

[0003] The present disclosure relates to a battery cell ID recovery method and a manufacturing process system using the battery cell ID recovery method. Background Art

[0004] In the battery pack manufacturing process, there are cases where tracking of battery cells fails. In the manufacturing process, tracking of battery cells can be performed using a cell ID written at a specific location on the battery cell and a method for capturing and identifying the cell ID. The cell ID can be an image with a specific pattern, such as a barcode. When the recognition device cannot recognize the cell ID image in the manufacturing process, tracking of the battery cell corresponding to the cell ID may fail.

[0005] When a battery pack has a quality problem, it is necessary to determine which unit manufacturing process in the manufacturing process caused the quality problem. When the tracking of the battery cells in the manufacturing process of the battery pack where the quality problem occurred fails, it may not be possible to determine the unit manufacturing process that caused the quality problem. Then, experienced engineers manually collect, process, and connect all the production history of each manufacturing process unit. This work requires an experienced engineer to invest a lot of time.

[0006] Since the precision of manual work is limited, all battery cells produced within a certain period of time should be discarded based on the time when quality problems occur in the cell manufacturing process. This increases the cost of battery cell disposal. Summary of the invention

[0007] Technical issues

[0008] Therefore, failure to track battery cells in a manufacturing process may result in problems requiring a lot of time and cost. The present disclosure attempts to provide a cell ID recovery method capable of preventing battery cell tracking failure and a manufacturing process system using the cell ID recovery method.

[0009] Technical Solution

[0010] According to an embodiment of the present invention, a manufacturing process system for controlling multiple unit manufacturing processes for assembling multiple battery cells may include: multiple electronic control devices, which control the multiple unit manufacturing processes; an equipment data collection (EDC) server, which receives and stores multiple normally identified cell ID images and multiple unidentified cell ID images from the multiple electronic control devices; and a cell ID recovery unit, which restores a candidate cell ID image that is most similar to a first unidentified cell ID image among the multiple unidentified cell ID images based on a first cell ID position corresponding to the first unidentified cell ID image. The candidate cell ID recovery unit restores the candidate cell ID image that is most similar to the first unidentified cell ID image to the cell ID of the first unidentified cell ID image.

[0011] When the cell ID restoration of the first unrecognized cell ID image fails, the cell ID restoration unit may re-read the first unrecognized cell ID image.

[0012] The EDC server may perform cell ID recovery on the plurality of unidentified cell ID images according to a predetermined rule, wherein the predetermined rule is based on a method of assigning the cell IDs, and the first unidentified cell ID image may be an unidentified cell ID image that cannot be recovered by the EDC server.

[0013] Among the multiple electronic control devices, the first electronic control device that controls the first unit manufacturing process in which the first unidentified battery cell ID image appears can derive the first battery cell ID position of the first unidentified battery cell ID image, and determine a predetermined number of candidate battery cell IDs based on the first battery cell ID position, and the candidate battery cell ID image can be a battery cell ID image corresponding to the candidate battery cell ID identified in a second unit manufacturing process prior to the first unit manufacturing process.

[0014] The battery cell ID recovery unit can calculate the similarity between the candidate battery cell ID image and the first unidentified battery cell ID image to export a candidate battery cell ID image among the candidate battery cell ID images that is most similar to the first unidentified battery cell ID image, and determine the battery cell ID corresponding to the exported candidate battery cell ID image as the battery cell ID of the first unidentified battery cell ID image.

[0015] The cell ID restoration unit may learn a method of calculating similarities between the plurality of unrecognized cell ID images and a plurality of normal cell ID images through deep learning.

[0016] The plurality of unrecognized cell ID images for learning by the cell ID restoration unit may be clustered according to reasons for unrecognizable.

[0017] The manufacturing process system may further include a clustering device that classifies the plurality of unrecognized cell ID images and performs learning to determine a cluster corresponding to each of the unrecognized cell ID images among a plurality of clusters.

[0018] Among the multiple electronic control devices, the first electronic control device that controls the first unit manufacturing process may include: a barcode reader that reads the multiple battery cell IDs that have undergone the first unit manufacturing process; and a first client that sends the battery cell IDs normally identified by the barcode reader and unidentified battery cell ID images to the EDC server.

[0019] When the first unrecognized cell ID image appears in the first unit manufacturing process, the first client may derive a first cell ID position of the first unrecognized cell ID image, and determine a predetermined number of candidate cell IDs based on the first cell ID position.

[0020] Among the multiple electronic control devices, a second electronic control device that controls a second unit manufacturing process prior to the first unit manufacturing process may include a second client, which determines a cell ID image corresponding to the candidate cell ID among the multiple cell IDs identified in the second unit manufacturing process as the candidate cell ID image.

[0021] The cell ID recovery unit may be provided in the second electronic control device.

[0022] When the first unidentified battery cell ID appears during a lamination process among the multiple unit manufacturing processes, the battery cell ID recovery unit can restore the candidate battery cell ID image that is most similar to the first unidentified battery cell ID image among the candidate battery cell ID images identified in a slotting process which is a step before the lamination process, as the battery ID of the first unidentified battery cell ID image.

[0023] When the cell ID restoration of the first unrecognized cell ID image fails, the cell ID restoration unit may re-read the first unrecognized cell ID image.

[0024] According to another embodiment of the present invention, a battery cell ID recovery method may include the following steps: a first electronic control device that controls a first unit manufacturing process among multiple unit manufacturing processes, derives an unidentified battery cell ID position, and the unidentified battery cell ID position is used as a first unidentified battery cell ID image position; the first electronic control device determines a predetermined number of candidate battery cell IDs based on the unidentified battery cell ID position; a second electronic control device that controls a second unit manufacturing process before the first unit manufacturing process determines a candidate battery cell ID image identified in the second unit manufacturing process and corresponding to the candidate battery cell ID; and the second electronic control device calculates the similarity between the candidate battery cell ID image and the first unidentified battery cell ID image to derive a candidate battery cell ID image among the candidate battery cell ID images that is most similar to the first unidentified battery cell ID image.

[0025] The battery cell ID recovery method may also include the following steps: the first electronic control device sends a plurality of unidentified battery cell ID images that cannot be identified to the EDC server; the EDC server performs battery cell ID recovery on the plurality of unidentified battery cell ID images according to predetermined rules; and the EDC server exports a first unidentified battery cell ID image that has not been recovered based on the result of performing the recovery.

[0026] The step of determining the candidate cell IDs by the first electronic control device may include the following steps: based on the unidentified cell ID positions, determining a predetermined number of front cell IDs and rear cell IDs as candidate cell IDs.

[0027] The cell ID recovery method may further include the following steps: the second electronic control device recovers the cell ID corresponding to the derived candidate cell ID image to the cell ID of the first unidentified cell ID image; and sends the recovered cell ID to the first electronic control device.

[0028] The first unit manufacturing process may be a lamination process, and the second unit manufacturing process may be a slotting process.

[0029] The cell ID recovery method may further include the following step: when the cell ID recovery of the first unrecognized cell ID image fails, re-reading the first unrecognized cell ID image.

[0030] Beneficial Effects

[0031] The present disclosure provides a cell ID recovery method capable of preventing battery cell tracking failure and a manufacturing process system using the cell ID recovery method. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a diagram schematically showing a manufacturing process system according to an embodiment.

[0033] Figure 2 is a diagram schematically illustrating a battery pack manufacturing process according to an embodiment.

[0034] Figure 3 and Figure 4 is a flowchart illustrating a cell ID recovery method according to an embodiment. DETAILED DESCRIPTION

[0035] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are given the same figure numbers and are not described repeatedly. The suffixes "module" and / or "unit" of the components used in the following description are only considered to be given or mixed for the convenience of writing the specification, and therefore, they themselves do not have meanings or functions that are distinguished from each other. In addition, when it is determined that a detailed description of known technologies related to the present disclosure may obscure the main points of the present disclosure, the detailed description will be omitted. In addition, it should be understood that the drawings are provided only to make the exemplary embodiments of the present disclosure easy to understand, and the spirit of the present disclosure is not limited to the drawings, but includes all modifications, equivalents and substitutions included in the spirit and scope of the present disclosure.

[0036] Terms including ordinal numbers such as first, second, etc. may be used to describe various components, but the components are not limited by these terms. The above terms are used only to distinguish one component from another.

[0037] Furthermore, in this specification, it should be understood that when it is stated that one component is “connected” or “coupled” to another component, the one component may be directly connected or coupled to the other component, or connected to the other component with other components interposed therebetween. On the other hand, it should be understood that when it is stated that one element is “directly connected to” or “directly coupled to” another component, the one element may be connected or coupled to the other element without other elements interposed therebetween.

[0038] It should be further understood that the terms “include” or “have” used in this specification indicate the presence of the features, numbers, steps, operations, components, parts or a combination thereof mentioned in this specification, but do not exclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or a combination thereof.

[0039] Hereinafter, in this specification, a “cell” may refer to one of an anode and a cathode constituting a battery cell, a battery cell, and a stacked battery cell in which a predetermined number of battery cells are stacked.

[0040] A cell tracking method according to an embodiment may include the following steps: restoring a cell ID when an event of cell ID recognition failure occurs in a plurality of unit manufacturing processes constituting an assembly process such as a slotting process, a lamination process, a stacking process, a folding process, and a packaging process. In this specification, an embodiment of a method of restoring a cell ID and a manufacturing process system using the method are described.

[0041] Figure 1 is a diagram schematically showing a manufacturing process system according to an embodiment.

[0042] Figure 1 The manufacturing process system 1 shown can control the slotting process, lamination process, stacking process and packaging process. The battery tracking method according to the embodiment can be applied to the manufacturing process system 1. The manufacturing process system 1 tracks the manufacturing process history of the battery based on the cell ID identified in each unit manufacturing process. The manufacturing process system 1 can identify the cell ID of the cell that has passed each unit manufacturing process, and know which manufacturing process is used to manufacture the corresponding cell among multiple manufacturing processes.

[0043] Figure 2 is a diagram schematically illustrating a battery pack manufacturing process according to an embodiment.

[0044] Figure 2 Each unit manufacturing process is schematically shown to help understand battery cell tracking. Figure 2 Among the multiple manufacturing processes shown, some manufacturing processes may be omitted, and processes not shown in the figure may be added. Figure 2 Some of the manufacturing processes shown in FIG. For example, the folding process is not shown in FIG. Figure 2 As shown in , a folding process can be added instead of a lamination process.

[0045] First, in the notching process, the anode member or cathode member wound into a roll shape can be cut into an electrode shape suitable for the shape of the battery cell. Laser notching equipment or press notching equipment can be used to cut electrodes from each member. Figure 2 As shown, a label connected to a non-coated part to which an anode active material is not applied is located in the anode member, and each label may be marked with a cell ID (ID_1). The cell ID ID_1 may be engraved on each label using a laser. Figure 2 In the embodiment, the cell ID ID_1 may be marked on the anode label, but the present invention is not limited thereto, and the cell ID may be marked on the cathode label.

[0046] Next, in a lamination process, the cathode and anode are laminated with the separator attached between the cathode and anode. Figure 2As shown, the structure of the battery cell can be one of a single cell structure, a double cell structure and a half cell structure, and as Figure 2 As shown, the cell ID ID_2 is printed on the anode label of the single cell, double cell and half cell. Figure 2 In the embodiment, the cell ID is printed on the anode label, but the present invention is not limited thereto, and the cell ID may be printed on the cathode label. The cell ID ID_2 and the cell ID ID_1 may be the same cell ID.

[0047] Next, in the stacking process, a predetermined number of battery cells are stacked in layers with separators between the layers. The stacked battery cell is manufactured by stacking a predetermined number of battery cells by the stacking process, and the cell ID ID_3 is printed on the anode label of each battery cell constituting each stacked battery cell. Among the stacked battery cells, the battery cell whose cell ID is exposed to the outside, such as Figure 2 The battery cell CELL1 (cell 1) at the top in the figure may represent a stacked battery cell. The stack virtual ID of the stacked battery cell may match the cell ID ID_3 of the battery cell CELL1. The cell ID ID_2 and the cell ID ID_3 may be the same cell ID. Alternatively, the battery cell with the cell ID ID_2 may be included in the stacked battery cell represented by the cell ID ID_3.

[0048] The cell ID ID_4 corresponding to the stacking virtual ID may be printed on a full-circumference tape surrounding the outside of the battery pack manufactured by the stacking process. The cell ID ID_3 and the cell ID ID_4 may be matched by the stacking virtual ID. The cell ID ID_4 is shown as being printed on a full-circumference tape, but the present invention is not limited thereto. The cell ID ID_4 may be printed in a position that can be identified from the outside of the stacked battery cell.

[0049] In the packaging process, the battery pack is packaged so that the assembly steps of the battery pack can be completed. The battery pack ID ID_5 matching the laminated cell ID ID_4 can be printed on the outside of the packaged battery pack.

[0050] In this way, based on the cell ID identified in each unit manufacturing process, the manufacturing process system 1 can track the manufacturing process history experienced by the cell. In the following, when the unit manufacturing process is applied to each of the multiple cells, the position of the cell in the specification can be determined according to the order in which the manufacturing process is applied to any cell. For example, the faster the order in which the manufacturing process is applied, the earlier the position of the cell. The position of the cell ID is determined according to the position of the cell. The earlier the position of the cell, the earlier the position of the corresponding cell ID image.

[0051] The manufacturing process system 1 may include a plurality of electronic control devices 10_1 to 10_5 that control a plurality of unit manufacturing processes, an equipment data collection (EDC) server 20 , and a clustering device 30 .

[0052] The EDC server 20 may store data acquired in the manufacturing process. Necessary information may be transmitted and received between the plurality of electronic control devices 10_1 to 10_4 and the EDC server 20 through wired and wireless communications. Figure 1 , it is shown that the communication bus 15 is constructed between the plurality of electronic control devices 10_1 to 10_4 and the EDC server 20, but the communication method between the components is not limited thereto.

[0053] Each of the plurality of electronic control devices 10_1 to 10_4 may control a corresponding unit manufacturing process and perform cell ID recognition to track each battery cell. The method by which each of the plurality of electronic control devices 10_1 to 10_4 controls the manufacturing process may be implemented by known techniques, and therefore, a detailed description thereof will be omitted. This specification describes a cell tracking method.

[0054] Each of the plurality of electronic control devices 10_1 to 10_4 can match the production equipment number of the process line that executes the unit manufacturing process, the LOT information of the object manufactured in the unit manufacturing process, and the cell ID reading time of the manufactured object to the cell ID recognition image. The cell ID reading time is the time when the cell ID is read by the barcode recognition unit of each unit manufacturing process, and the cell ID recognition image can be an image of the cell ID read by the barcode recognition unit. Each of the plurality of electronic control devices 10_1 to 10_4 can obtain whether the cell ID recognition fails and obtain information about the cell ID. The cell ID can be the cell ID read by the barcode recognition unit.

[0055] The EDC server 20 may form the information received from the plurality of electronic control devices 10_1 to 10_4 into a database and store the information. For example, the EDC server 20 may classify the cell ID reading time, the cell ID recognition image, whether the cell ID recognition fails, the cell ID, the production equipment number, and the LOT information according to a predetermined standard and form them into the database. In this case, the predetermined standard may be the cell ID reading time.

[0056] In addition, when the EDC server 20 receives an unrecognized cell ID image from the electronic control devices 10_1 to 10_4 through the communication bus 40, the EDC server 20 may perform cell ID recovery on the unrecognized cell ID image according to a predetermined rule. For example, the predetermined rule is based on a method of assigning cell IDs, and when a plurality of cell IDs are assigned to have values ​​that increase in a predetermined unit order, the EDC server 20 may derive a cell ID corresponding to the unrecognized cell ID image based on cell IDs of cells located before and after the cell corresponding to the unrecognized cell ID image.

[0057] like Figure 1 As shown, the electronic control device 1 applied to the slotting process includes a barcode reader 110, a cell ID recovery unit 120 and a client 130. Figure 1 , the cell ID recovery unit 120 is shown to be disposed in the electronic control device 1, but the present invention is not limited thereto. For example, the cell ID recovery unit 120 is a separate configuration and is disposed outside the electronic control devices 10_1 to 10_4, or may be disposed in any one of the electronic control devices 2, 3, and 4.

[0058] The barcode reader 110 may generate a cell ID image by reading the cell ID ID_1 of the anode cut by the slotting process, and identify the cell ID from the generated cell ID image. When the barcode reader 110 cannot identify the cell ID from the generated cell ID image, the barcode reader 110 may regenerate the cell ID image. The barcode reader 110 may identify the cell ID from the regenerated cell ID image. When the barcode reader 110 is ultimately unable to identify the cell ID, the electronic control device 1 may store the manufacturing process information corresponding to the cell for which the cell ID identification failed, and send the stored manufacturing process information to the upper controller.

[0059] The client 130 may transmit the cell ID recognized by the barcode reader 110 and the unrecognized cell ID image to the EDC server 20. In this case, the unrecognized cell ID image may be one of the initially generated cell ID image, the regenerated cell ID image, or both images.

[0060] The cell ID recovery unit 120 may perform recovery on an unidentified cell ID image that cannot be recovered in the EDC server 20. The cell ID recovery unit 120 may learn a method for recovering an unidentified cell ID image through deep learning, and recover an unidentified cell ID image generated in each unit manufacturing process. The cell ID recovery unit 120 may train a method for recovering a plurality of unidentified cell ID images through deep learning. The cell ID recovery unit 120 may use accumulated learning data in deep learning, the learning data including a plurality of unidentified cell ID images and a plurality of normal cell ID images corresponding thereto.

[0061] In addition, the cell ID recovery unit 120 can restore the unidentified cell ID image using the cell ID images of a predetermined number of cells (hereinafter referred to as candidate cell ID images) based on the positions of cells corresponding to the unidentified cell ID in a previous unit process in which the unidentified unit manufacturing process occurred.

[0062] The cell ID recovery unit 120 may calculate the similarity between the candidate cell ID image and the unidentified cell ID image to derive the candidate cell ID image that is most similar to the unidentified cell ID image among all the candidate cell ID images. The cell ID recovery unit 120 may determine the cell ID corresponding to the derived candidate cell ID image as the cell ID for the unidentified cell ID image. The cell ID recovery unit 120 may send the recovered cell ID to the client 130, and the client 130 may send the cell ID to the EDC server 20 and the client of the electronic control device of other unit manufacturing processes in which the unidentified cell ID image appears. The EDC server 20 may replace the unidentified cell ID image with the received cell ID and store the received cell ID in the database.

[0063] The cell ID recovery unit 120 may not be able to recover the first unidentified cell ID image. For example, when all similarities between all candidate cell ID images and the first unidentified cell ID image are less than a predetermined threshold, the cell ID recovery unit 120 may determine that the recovery of the first unidentified cell ID image has failed. In this case, the cell ID recovery unit 120 may re-read the first unidentified cell ID image. For example, the cell ID recovery unit 120 may re-read the first unidentified cell ID image that could not be recovered by a method of recovering an unidentified cell ID image learned by deep learning. Through this TWO-TRACK recovery, the reading rate for unidentified cell ID images can be improved.

[0064] The cell ID recovery unit 120 may learn a method for calculating the similarity between a plurality of unidentified cell ID images and a normally identified cell ID image (hereinafter referred to as a normal cell ID image) as a candidate cell ID image through deep learning. A plurality of normal cell ID images and a plurality of unidentified cell ID images may be used as learning data for deep learning of the cell ID recovery unit 120. In this case, when a plurality of unidentified cell ID images are clustered according to the reason for unidentification, the accuracy of learning may be improved. According to one embodiment, the unidentified cell ID images used for learning of the cell ID recovery unit 120 may be clustered.

[0065] To this end, the manufacturing process system 1 may include a separate component for clustering unidentified cell ID images. For example, the manufacturing process system 1 may also include a clustering device 30. The cell ID image has a certain size, but if the cell ID image is used as it is, the order of the data is too large. Therefore, t-distributed stochastic neighbor embedding (t-SNE) can be used to reduce the order of multiple images to two dimensions. K-means clustering can be applied to two-dimensional images to cluster the two-dimensional images.

[0066] The clustering device 30 can classify multiple unidentified battery cell ID images, and perform learning to determine a cluster corresponding to each unidentified battery cell ID image among multiple clusters. Learning can be performed according to a deep learning technique, and the deep learning technique can be, for example, a convolutional neural network (CNN) algorithm. The clustering device 30 can program and store a classification model that executes the CNN algorithm, and operate the program to perform learning, so as to classify the unidentified battery cell ID image into one of multiple clusters. According to the CNN algorithm, the clustering device 30 performs feature extraction on the unidentified battery cell ID image as input data through a convolution layer, a ReLU layer, and a pooling layer, and inputs the extracted features into a flatten layer. The clustering device 30 includes a classifier that uses a feature corresponding to the flatten layer as an input, and the classifier can classify the unidentified battery cell ID image into one of multiple clusters. The classifier may include an input layer, at least one hidden layer, and an output layer.

[0067] The clustering device 30 can be implemented using one or a combination of two or more of various known deep learning techniques. The clustering device 30 is not limited by the contents described in this specification. The present invention can classify the unidentified cell ID images into multiple clusters, and perform learning through deep learning to classify the unidentified cell ID images into one of the multiple clusters, thereby improving the clustering classification accuracy of the unidentified cell ID images.

[0068] exist Figure 1In the embodiment, the clustering device 30 is configured to be included in the manufacturing process system 1, and is shown to provide learning data through the communication bus 40, but the present invention is not limited thereto. The clustering device 30 is implemented as a configuration separate from the manufacturing process system 1, and can send the learning data to the manufacturing process system 1 through the network.

[0069] like Figure 1 As shown, the electronic control device 2 applied to the lamination process includes a barcode reader 210 and a client 220 .

[0070] The barcode reader 210 may generate a cell ID image by reading the battery cell ID ID_2 formed by the lamination process, and recognize the cell ID from the generated cell ID image. When the barcode reader 210 cannot recognize the cell ID from the generated cell ID image, the barcode reader 210 may designate the corresponding cell ID image as an unrecognized cell ID image and transmit the designated cell ID image to the client 220. The cell ID normally recognized by the barcode reader 210 may also be transmitted to the client 220. When the cell ID of the unrecognized cell ID image is not restored by the EDC server 20 and the cell ID restoration unit 120, the barcode reader 210 may re-read the cell ID of the corresponding cell to generate the cell ID image.

[0071] The client 220 may transmit the recognized cell ID and the unrecognized cell ID image to the EDC server 20 .

[0072] like Figure 1 As shown, the electronic control device 3 applied to the lamination process includes two barcode readers 310 and 320 , a client 320 and a laminated cell management unit 340 .

[0073] The barcode reader 310 may generate a cell ID image by reading a battery cell ID ID_3 representing a stacked battery cell formed by a stacking process, and identify the cell ID ID_3 from the generated cell ID image. When the barcode reader 310 cannot identify the cell ID from the generated cell ID image, the barcode reader 110 may regenerate the cell ID image. The barcode reader 310 may identify the cell ID from the regenerated cell ID image. The barcode reader 310 may send the identified cell ID and the unidentified cell ID image to the client 330.

[0074] The barcode reader 320 can generate a laminated cell ID image by reading the laminated cell ID of the laminated battery cell. As described above, the laminated cell ID can be printed on the full-circumference tape surrounding the outside of the laminated battery cell. The barcode reader 320 can identify the laminated cell ID from the laminated cell ID image and send the identified laminated cell ID to the client 330 and the laminated cell management unit 340.

[0075] The client 330 may send the recognized cell ID, the unrecognized cell ID image, and the laminated cell ID to the EDC server 20. In this case, the unrecognized cell ID image may be one of the initially generated cell ID image, the regenerated cell ID image, or both images.

[0076] The stacked cell management unit 330 may receive a cell ID representing a stacked battery cell from any one of the barcode reader 310 and the client 330 , match the stacked cell ID received from the barcode reader 320 with the representative cell ID, and store the matching result.

[0077] like Figure 1 As shown, the electronic control device 4 applied to the lamination process includes a barcode reader 410 and a client 420 .

[0078] The barcode reader 410 may generate a battery pack ID image by reading the battery pack ID ID_4 printed on the outside of the battery pack formed by the packaging process, and identify the battery pack ID ID_4 from the generated battery pack ID image. When the barcode reader 410 cannot identify the battery pack ID from the generated battery pack ID image, the barcode reader 410 may regenerate the battery pack ID image. The barcode reader 410 may identify the battery pack ID ID_5 from the regenerated battery pack ID image. The barcode reader 410 may send the identified battery pack ID and the unidentified battery pack ID image to the client 420.

[0079] The client 420 may send the identified battery pack ID and the unidentified battery pack ID image to the EDC server 20. In this case, the unidentified battery pack ID image may be one of the initially generated battery pack ID image, the regenerated battery pack ID image, or both. The client 420 may match the battery pack ID with the cell IDs of the plurality of stacked battery cells constituting the battery pack, and send the matching result to the EDC server 20.

[0080] Figure 3 and Figure 4 is a flowchart illustrating a cell ID recovery method according to an embodiment.

[0081] Figure 3 and Figure 4 A method of recovering the cell ID of an unidentified image generated during the lamination process is shown.

[0082] First, the barcode reader 210 identifies the cell ID of the cell that has completed the lamination process. The client 220 sends a plurality of cell IDs identified by the barcode reader 210 and a plurality of unidentified cell ID images that cannot be identified to the EDC server 20 according to the identification order (S1). The information sent by the client 220 to the EDC server 20 is collectively referred to as cell information.

[0083] The EDC server 20 may perform cell ID recovery on a plurality of unrecognized cell ID images according to a predetermined rule (S2). The predetermined rule may follow the method of assigning cell IDs as described above. When one of the consecutive cell IDs cannot be recognized, the EDC server 20 may restore the unrecognized cell ID image using the cell ID of the immediately preceding position and the cell ID of the immediately succeeding position adjacent to the unrecognized cell ID image.

[0084] An example of the restoration operation of the EDC server 20 is as follows. When the cell ID at the immediately preceding position of the unrecognized cell ID is "ABC1234" and the cell ID at the immediately succeeding position of the unrecognized cell ID is "ABC1236" among the cell IDs at the consecutive positions, the EDC server 20 may restore the cell ID of the unrecognized cell ID image to "ABC1235". However, when there are two or more unrecognized cell IDs among the consecutive cell IDs, the EDC server 20 may not be able to perform restoration.

[0085] The EDC server 20 may export a first unrecognized cell ID image that may not be restored among the plurality of unrecognized cell ID images received from the client 220 ( S3 ).

[0086] The client 220 may query the EDC server 20 for the first unrecognized cell ID image at every set period (S4). For example, the client 220 may request that the derived first unrecognized cell ID image be transmitted to the EDC server 20.

[0087] The EDC server 20 may transmit the first unrecognized cell ID image to the client 220 in response to the request from the client 220 ( S5 ).

[0088] The client 220 may derive a position of the first unrecognized cell ID image (hereinafter referred to as an unrecognized cell ID position) (S6).

[0089] The client 220 may determine a predetermined number of candidate cell IDs among the plurality of cell IDs based on the unidentified cell ID positions (S7). The client 220 may determine a predetermined number of front and back cell IDs as candidate cell IDs based on the unidentified cell ID positions.

[0090] The client 220 may transmit the first unrecognized cell ID image, a request to restore the first unrecognized cell ID image, and the candidate cell IDs to the client 130 of the electronic control device 1 in the slotting process which is a unit manufacturing process before the lamination process ( S8 ).

[0091] The client 130 may derive a cell ID image corresponding to the candidate cell ID from the slotting process (S9). Hereinafter, the cell ID image corresponding to the candidate cell ID in the previous step is referred to as the candidate cell ID image. In one embodiment, the "previous step" may refer to a slotting process step of a previous unit manufacturing process as a lamination process.

[0092] The client 130 transmits the first unrecognized cell ID image and the candidate cell ID images to the cell ID restoring unit 120 (S10).

[0093] The cell ID recovery unit 120 can calculate the similarity between the candidate cell ID image and the first unidentified cell ID image, derive the candidate cell ID image with the highest similarity between all the candidate cell ID images and the first unidentified cell ID image, and restore the cell ID corresponding to the derived candidate cell ID image to the cell ID of the first unidentified cell ID image (S11).

[0094] The cell ID restoring unit 120 transmits the restored cell ID (hereinafter referred to as the restored cell ID) to the client 130 ( S12 ).

[0095] The client 130 may transmit the restored cell ID to the client 220 and the EDC server 20 ( S13 ). Alternatively, the client 130 may transmit the restored cell ID to the client 220 , and the client 220 may transmit the restored cell ID to the EDC server 20 .

[0096] The EDC server 20 may update the cell ID of the first unrecognized cell ID image to the received restored cell ID.

[0097] Figure 3 and Figure 4A method for recovering an unidentified cell ID image generated in a lamination process is shown, but the present invention is not limited thereto. For an unidentified cell ID image generated in a lamination process, cell ID recovery can be performed in the same manner. For example, the client 330 can determine a candidate cell ID by deriving the position of the unidentified cell ID generated in the lamination process, and send a recovery request together with the unidentified cell ID image and the candidate cell ID to the client 130. However, the cell ID in the lamination process is different from the cell ID in the lamination process and the slotting process. In this case, the candidate cell ID in the lamination process is the cell ID of the stack, so the client 330 can derive a candidate cell ID image corresponding to the candidate cell ID, and send the derived candidate cell ID image together with the unidentified cell ID image to the client 130. The cell ID recovery unit 120 may calculate the similarity between the candidate cell ID image and the unidentified cell ID image to derive the candidate cell ID image that is most similar to the unidentified cell ID image among all the candidate cell ID images, and recover the cell ID corresponding to the derived candidate cell ID image to the cell ID of the unidentified cell ID image. The cell ID recovery unit 120 may send the recovered cell ID to the client 130, and the client 130 may send the recovered cell ID to the client 330 and the EDC server 20 (S13). Alternatively, the client 130 may send the recovered cell ID to the client 330, and the client 330 may send the recovered cell ID to the EDC server 20. The EDC server 20 may update the cell ID of the unidentified cell ID image to the received recovered cell ID.

[0098] Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by a person of ordinary skill in the art to which the present invention pertains belong to the scope of the present invention.

Claims

1. A manufacturing process system, the manufacturing process system controlling a plurality of unit manufacturing processes for assembling a plurality of battery cells, the manufacturing process system comprising: a plurality of electronic control devices, the plurality of electronic control devices controlling the plurality of unit manufacturing processes; an equipment data collection (EDC) server that receives and stores a plurality of normally recognized cell ID images and a plurality of unrecognized cell ID images from the plurality of electronic control devices; as well as A cell ID recovery unit, wherein the cell ID recovery unit recovers a candidate cell ID image that is most similar to a first unidentified cell ID image among the multiple unidentified cell ID images based on a first cell ID position corresponding to the first unidentified cell ID image, as a cell ID of the first unidentified cell ID image.

2. The manufacturing process system according to claim 1, wherein: The EDC server: performs cell ID recovery on the plurality of unrecognized cell ID images according to a predetermined rule, wherein the predetermined rule is based on a method of assigning the cell IDs, and The first unidentified battery cell ID image is an unidentified battery cell ID image that cannot be restored by the EDC server.

3. The manufacturing process system according to claim 1, wherein: Among the plurality of electronic control devices, a first electronic control device that controls a first unit manufacturing process in which the first unrecognized cell ID image appears: derives a first cell ID position of the first unrecognized cell ID image, and determines a predetermined number of candidate cell IDs based on the first cell ID position, and The candidate cell ID image is a cell ID image corresponding to the candidate cell ID identified in a second unit manufacturing process prior to the first unit manufacturing process.

4. The manufacturing process system according to claim 1, wherein: The battery cell ID recovery unit calculates the similarity between the candidate battery cell ID image and the first unidentified battery cell ID image to derive a candidate battery cell ID image among the candidate battery cell ID images that is most similar to the first unidentified battery cell ID image, and determines the battery cell ID corresponding to the derived candidate battery cell ID image as the battery cell ID of the first unidentified battery cell ID image.

5. The manufacturing process system according to claim 4, wherein: The battery cell ID recovery unit learns a method for calculating similarities between the multiple unidentified battery cell ID images and multiple normal battery cell ID images through deep learning.

6. The manufacturing process system according to claim 5, wherein: The plurality of unrecognized cell ID images for learning by the cell ID restoration unit are clustered according to reasons for unrecognizable.

7. The manufacturing process system according to claim 6, further comprising: A clustering device that classifies the plurality of unrecognized cell ID images and performs learning to determine a cluster corresponding to each of the unrecognized cell ID images among a plurality of clusters.

8. The manufacturing process system according to claim 1, wherein: Among the plurality of electronic control devices, a first electronic control device for controlling the first unit manufacturing process includes: a barcode reader that reads a plurality of battery cell IDs that have undergone the first unit manufacturing process; and A first client sends a battery cell ID normally recognized by the barcode reader and an unrecognized battery cell ID image to the EDC server.

9. The manufacturing process system according to claim 8, wherein: When the first unrecognized cell ID image appears in the first unit manufacturing process, the first client: derives a first cell ID position of the first unrecognized cell ID image, and determines a predetermined number of candidate cell IDs based on the first cell ID position.

10. The manufacturing process system according to claim 9, wherein: Among the plurality of electronic control devices, a second electronic control device for controlling a second unit manufacturing process prior to the first unit manufacturing process includes: A second client determines a cell ID image corresponding to the candidate cell ID among the plurality of cell IDs identified in the second unit manufacturing process as the candidate cell ID image.

11. The manufacturing process system according to claim 10, wherein: The cell ID recovery unit is disposed in the second electronic control device.

12. The manufacturing process system according to claim 1, wherein: When the first unidentified battery cell ID appears during the lamination process among the multiple unit manufacturing processes, the battery cell ID recovery unit: restores the candidate battery cell ID image most similar to the first unidentified battery cell ID image among the candidate battery cell ID images identified in the slotting process which is a step before the lamination process, to the battery ID of the first unidentified battery cell ID image.

13. The manufacturing process system according to claim 1, wherein: When the cell ID restoration of the first unrecognized cell ID image fails, the cell ID restoration unit re-reads the first unrecognized cell ID image.

14. A method for restoring a battery cell ID, the method comprising the following steps: A first electronic control device that controls a first unit manufacturing process among a plurality of unit manufacturing processes derives an unidentified cell ID position, wherein the unidentified cell ID position is used as a first unidentified cell ID image position; Determining, by the first electronic control device, a predetermined number of candidate cell IDs based on the unidentified cell ID positions; Determining, by a second electronic control device that controls a second unit manufacturing process prior to the first unit manufacturing process, a candidate cell ID image corresponding to the candidate cell ID identified in the second unit manufacturing process; as well as The second electronic control device calculates the similarity between the candidate cell ID images and the first unrecognized cell ID image to derive a candidate cell ID image among the candidate cell ID images that is most similar to the first unrecognized cell ID image.

15. The method for restoring a cell ID according to claim 14, further comprising the following steps: The first electronic control device sends the multiple unidentified battery cell ID images that cannot be identified to the EDC server; The EDC server performs cell ID recovery on the plurality of unrecognized cell ID images according to a predetermined rule; as well as The EDC server exports a first unrecognized battery cell ID image that has not been restored according to a result of executing the restoration.

16. The method for restoring a cell ID according to claim 14, wherein: The step of determining the candidate cell ID by the first electronic control device comprises the following steps: Based on the unidentified cell ID positions, a predetermined number of cell IDs at front positions and cell IDs at rear positions are determined as candidate cell IDs.

17. The method for restoring a cell ID according to claim 14, further comprising the following steps: The second electronic control device restores the cell ID corresponding to the derived candidate cell ID image to the cell ID of the first unrecognized cell ID image; as well as The restored cell ID is sent to the first electronic control device.

18. The method for restoring a cell ID according to claim 14, wherein: The first unit manufacturing process is a lamination process, and the second unit manufacturing process is a slotting process.

19. The method for restoring a cell ID according to claim 14, further comprising the following steps: When the cell ID restoration of the first unrecognized cell ID image fails, re-reading is performed on the first unrecognized cell ID image.

Images