Battery cell information recording method and device, electronic equipment and storage medium

Abstract

The application provides an electrode information recording method and device, electronic equipment and storage medium; wherein the method comprises: generating a plurality of first identifiers for a target electrode film roll, each first identifier being used to record production data in a defined area of the target electrode film roll; recording production data during the manufacturing of an electrode based on the target electrode film roll in each first identifier; for any one target electrode in a plurality of electrodes constructed based on the target electrode film roll, determining a second identifier of the target electrode according to a plurality of first identifiers covered by the target electrode. Data of each stage of electrode production can be recorded to facilitate the tracing of electrode production data.

Description

Technical Field

[0001] This application relates to the field of battery management technology, and more specifically, to a method, apparatus, electronic device, and storage medium for recording battery cell information. Background Technology

[0002] Battery cell production is generally carried out in batches, with each batch typically producing a relatively large quantity. Production data for each cell is usually measured manually or using testing tools after each cell is formed. However, this method of measurement can only record a limited amount of information. Summary of the Invention

[0003] In view of this, the purpose of this application is to provide a method, apparatus, electronic device and storage medium for recording battery cell information, so as to improve the problem of difficulty in tracing battery cell abnormalities.

[0004] In a first aspect, embodiments of this application provide a method for recording battery cell information, comprising: generating a plurality of first identifiers for a target electrode film roll; wherein each first identifier is used to record production data of its production within a defined area of ​​the target electrode film roll; recording production data during the battery cell manufacturing process based on the target electrode film roll in each of the first identifiers; and determining a second identifier of the target battery cell for any one of a plurality of battery cells constructed based on the target electrode film roll, according to the plurality of first identifiers covered by the target battery cell.

[0005] In an optional implementation, the production data includes: first production data, second production data, and third production data; the step of recording the production data during the process of manufacturing the battery cell based on the target electrode film roll in each of the first identifiers includes: recording the first production data of the target electrode film roll obtained during the coating stage in each of the first identifiers; recording the second production data of the target electrode film roll obtained during the cold pressing stage in each of the first identifiers; and recording the third production data of the target electrode film roll obtained during the slitting stage in each of the first identifiers.

[0006] In an optional implementation, recording the first production data of the target electrode film roll obtained during the coating stage in each of the first identifiers includes: during the coating stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, recording the first production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier; wherein, n is a positive integer greater than or equal to one and less than or equal to the total number of the first identifiers on the target electrode film roll.

[0007] In an optional implementation, recording the first production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier includes: during the coating stage, recording the first time of reading the nth first identifier; determining the first time difference between measuring the first production data and reading the first identifier based on the distance between the reading device that reads the first identifier and the first measuring device that measures the first production data of the real-time position of the target electrode film roll; filtering the first production data of the real-time position of the target electrode film roll with the nth first identifier from the first production data measured by the first measuring device based on the first time difference; and recording the first production data of the real-time position of the target electrode film roll in the nth first identifier.

[0008] In an optional implementation, the step of recording the second production data of the target electrode film roll obtained during the cold pressing stage in each of the first identifiers includes: during the cold pressing stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, recording the second production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier.

[0009] In an optional implementation, recording the second production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier includes: during the cold pressing stage, recording the second time of reading the nth first identifier; determining the second time difference between measuring the second production data and reading the first identifier based on the distance between the reading device that reads the first identifier and the second measuring device that measures the second production data of the real-time position of the target electrode film roll; filtering the second production data of the real-time position of the target electrode film roll with the nth first identifier from the second production data measured by the second measuring device based on the second time difference; and recording the second production data of the real-time position of the target electrode film roll in the nth first identifier.

[0010] In an optional implementation, the step of recording the third production data of the target electrode film roll obtained during the slitting stage in each of the first identifiers includes: during the slitting stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, recording the third production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier.

[0011] In an optional implementation, recording the third production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier includes: during the slitting stage, recording the third time of reading the nth first identifier; determining the third time difference between measuring the third production data and reading the first identifier based on the distance between the reading device that reads the first identifier and the second measuring device that measures the third production data of the real-time position of the target electrode film roll; filtering out the third production data of the real-time position of the target electrode film roll with the nth first identifier from the third production data measured by the second measuring device based on the third time difference; and recording the third production data of the real-time position of the target electrode film roll in the nth first identifier.

[0012] In an optional implementation, determining the second identifier of a target battery cell based on a plurality of first identifiers covered by the target battery cell for any one of the multiple target battery cells constructed based on the target electrode film roll includes: during the winding process of any one of the target battery cells constructed based on the target electrode film roll, sequentially reading a plurality of target first identifiers corresponding to the target battery cell in the target electrode film roll to obtain target production data recorded by the plurality of target first identifiers; and determining the second identifier of the target battery cell based on the target production data.

[0013] In an optional implementation, determining the second identifier of the target battery cell based on the target production data includes: generating an initial identifier of the target battery cell; and binding the target production data with the initial identifier to determine the second identifier of the target battery cell.

[0014] In an optional implementation, the first production data includes the thickness of the target electrode film roll during the coating stage; the second production data includes the thickness of the target electrode film roll during the cold pressing stage; and the third production data includes the thickness of the target electrode film roll during the slitting stage.

[0015] In an optional implementation, generating multiple first identifiers for the target electrode film roll includes: sending control commands to a laser engraving machine to control the laser engraving machine to engrave multiple first identifiers on the target electrode film roll; wherein the production data of the defined area of ​​the target electrode film roll recorded by the first identifier is determined by the position of the first identifier.

[0016] In an optional implementation, sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks in the target electrode film roll area includes: sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks at equal intervals in the target electrode film roll.

[0017] In an optional implementation, sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks at equal intervals on the target electrode film roll includes: determining the mark spacing according to the cell size to be produced from the target electrode film roll; sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks on the target electrode film roll; wherein the spacing between two adjacent first marks is the mark spacing.

[0018] In an optional implementation, sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks in the film area of ​​the target electrode film roll includes: sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks in the film area of ​​the target electrode film roll.

[0019] In an alternative embodiment, the first identifier is an identifier engraved on the target electrode film roll.

[0020] Secondly, embodiments of this application provide a battery cell information recording device, comprising: a generation module, configured to generate a plurality of first identifiers for a target electrode film roll; wherein each first identifier is used to record production data of its defined area in the target electrode film roll; a recording module, configured to record production data during the battery cell manufacturing process based on the target electrode film roll in each of the first identifiers; and a determination module, configured to determine a second identifier of any target battery cell among a plurality of battery cells constructed based on the target electrode film roll, based on the plurality of first identifiers covered by the target battery cell.

[0021] Thirdly, embodiments of this application provide an electronic device, including: a processor and a memory, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the machine-readable instructions are executed by the processor to perform the steps of the method described above.

[0022] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, performs the steps of the method described above.

[0023] Fifthly, embodiments of this application provide a battery cell information recording system, including: an identifier generator, a reading device, and a host computer; the identifier generator is used to generate multiple first identifiers corresponding to electrode film rolls; the reading device is used to generate multiple first identifiers corresponding to electrode film rolls; the host computer is used to record production data during the electrode film roll manufacturing process into each of the first identifiers.

[0024] The battery cell information recording method, apparatus, electronic device, storage medium, and system provided in this application, by generating multiple first identifiers, can record production data at different locations on the electrode film roll. This not only records the production information of the entire electrode film roll, but each first identifier can also record production information at specific locations on the electrode film roll. Based on these first identifiers, more refined recording of the electrode film roll is achieved, resulting in more accurate traceability information when tracing individual battery cells. Furthermore, by recording production data during the battery cell production process using these first identifiers, more refined traceability of battery cell production data is possible.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram illustrating interaction with the battery cell information recording system provided in this application embodiment;

[0028] Figure 2 A block diagram illustrating an electronic device provided in an embodiment of this application;

[0029] Figure 3 A flowchart of the cell information recording method provided in the embodiments of this application;

[0030] Figure 4 A schematic diagram of the electrode film roll used in the cell information recording method provided in the embodiments of this application;

[0031] Figure 5 An optional flowchart of step 320 of the cell information recording method provided in an embodiment of this application;

[0032] Figure 6 An optional flowchart of step 321 of the cell information recording method provided in the embodiments of this application;

[0033] Figure 7 An optional flowchart of step 322 of the battery cell information recording method provided in the embodiments of this application;

[0034] Figure 8An optional flowchart of step 323 of the cell information recording method provided in the embodiments of this application;

[0035] Figure 9 A schematic diagram illustrating the recording process of the battery cell information recording method provided in this application embodiment;

[0036] Figure 10 A schematic diagram of the functional modules of the battery cell information recording device provided in the embodiments of this application. Detailed Implementation

[0037] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0038] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] In order to ensure that the battery cells meet the usage requirements, the quality of the battery cells usually needs to be tested before they leave the factory.

[0040] The inventors' research revealed that battery cell testing typically involves manual inspection or testing equipment to examine the cell's appearance. In some cases, if an anomaly is found after visual inspection, adjustments can be made to the battery production process, improving the quality of subsequent cells. However, currently, it's difficult to trace the problem back to the point where it occurred. In other situations, visual inspection alone may not be sufficient for complete cell testing.

[0041] Based on the above-mentioned research, this application provides a method for recording battery cell information, which enables the recording of production data during the battery cell manufacturing process. Based on this recorded production data, traceability of battery cell production data can be achieved, thereby further enabling accurate battery cell testing and problem identification.

[0042] To facilitate understanding of this embodiment, the operating environment of the battery information recording system that implements the battery information recording method disclosed in this application embodiment will first be introduced.

[0043] The battery cell information recording system provided in this application embodiment may include: an identifier generator 110, a reading device 120, and a host computer 130.

[0044] In this embodiment, the identifier generator 110 is used to generate multiple first identifiers corresponding to the electrode film roll. For example, the identifier generator 110 can be a laser engraving machine, which can engrave identifiers using a laser. The identifier can be a QR code, barcode, string, etc. The laser engraving machine can engrave the first identifiers at different positions on the electrode film roll, and the first identifiers can record production data for different positions on the electrode film roll.

[0045] The reading device 120 is used for multiple first identifiers corresponding to the electrode film roll.

[0046] The host computer 130 is used to record production data during the electrode film roll manufacturing process into each of the first identifiers. For example, the host computer 130 can obtain the first identifier read by the reading device 120, and it can also obtain data measured by the measuring device 140 at various stages of the cell production workshop. Then, the host computer 130 can match the data obtained by the measuring device 140 with the corresponding first identifiers of the electrode film roll.

[0047] The identifier generator 110 can be installed at any location before the electrode film roll enters the working area of ​​the coating machine. Multiple first identifiers are generated for the electrode film roll before it enters the coating stage.

[0048] The cell information recording system may include multiple reading devices 120. For example, one or more reading devices 120 may be provided at each production stage to read the first identifier of the electrode film roll at the corresponding stage. Exemplarily, the manufacturing process of one type of cell may include at least: a coating stage, a cold pressing stage, a slitting stage, and a winding stage. One or more reading devices 120 may be provided at each of the coating stage, cold pressing stage, slitting stage, and winding stage.

[0049] The host computer 130 can communicate with the measuring devices 140 at each production stage and with the reading devices 120 at each production stage to obtain the data measured by the measuring devices 140 at each production stage and the first identifier read by the reading devices 120 at each production stage. The reading device 120 can be a code reader.

[0050] Optionally, the host computer 130 can also communicate with a manufacturing execution system (MES), which can be used to summarize and record data of each battery cell and each production run.

[0051] Optionally, the host computer 130 can also determine the second identifier of any target battery cell based on the multiple first identifiers covered by the target battery cell.

[0052] This cell information recording system can also be used to perform other steps in the cell information recording method.

[0053] like Figure 2 The diagram shown is a block illustration of an electronic device. The electronic device 200 may include a memory 211 and a processor 213. Those skilled in the art will understand that... Figure 2 The structure shown is for illustrative purposes only and does not limit the structure of the electronic device 200. For example, the electronic device 200 may also include components that are more... Figure 2 The more or fewer components shown, or having the same Figure 2 The different configurations shown.

[0054] The memory 211 and processor 213 described above are electrically connected directly or indirectly to enable data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses or signal lines. The processor 213 described above is used to execute executable modules stored in the memory.

[0055] The memory 211 can be, but is not limited to, Random Access Memory (RAM), Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), etc. The memory 211 stores programs, and the processor 213 executes these programs upon receiving execution instructions. The methods executed by the electronic device 200, as defined in any embodiment of this application, can be applied to or implemented by the processor 213.

[0056] The aforementioned processor 213 may be an integrated circuit chip with signal processing capabilities. The processor 213 may be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it may also be a digital signal processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor.

[0057] Figure 1 The host computer shown may include Figure 2 The structure of the electronic device 200 shown can be modified, depending on the specific requirements, by including components that are more complex than those shown. Figure 2 The electronic devices shown have a structure of more or fewer than 200.

[0058] The electronic device 200 in this embodiment can be used to execute various steps in the various methods provided in the embodiments of this application. The implementation process of the battery cell information recording method is described in detail below through several embodiments.

[0059] Please see Figure 3 This is a flowchart of the cell information recording method provided in the embodiments of this application. The following will describe... Figure 3 The specific process shown will be explained in detail.

[0060] Step 310: Generate multiple first identifiers for the target electrode film roll.

[0061] Each of these first identifiers is used to record production data for its defined area within the target electrode film roll.

[0062] The target electrode film roll can be large in size, such as 1,000 meters, 3,000 meters, 5,000 meters, or 10,000 meters. Each roll can be used to wind multiple battery cells. Of course, target electrode film rolls in different production workshops can include longer or shorter rolls. For example, a 1,000-meter target electrode film roll corresponds to 1,000 first identifiers, and each first identifier can record production data within a one-meter area of ​​the target electrode film roll. As another example, a 5,000-meter target electrode film roll corresponds to 500 first identifiers, and each first identifier can record production data within a ten-meter area of ​​the target electrode film roll. Yet another example, a 5,000-meter target electrode film roll corresponds to 10,000 first identifiers, and each first identifier can record production data within a fifty-centimeter area of ​​the target electrode film roll. Of course, depending on actual needs, each first identifier can also be used to record production data within different areas of the target electrode film roll; the area recorded by each first identifier can be larger or smaller, and can be specifically set according to actual requirements.

[0063] The first identifier can be any identifier that can record production data, such as a QR code, barcode, or string.

[0064] Optionally, each first identifier can be displayed at a different position on the target electrode film roll. Optionally, each first identifier can also be recorded in an electronic device, and after the electronic device receives measurement data from different positions of the target electrode film roll, it binds the measurement data with the first identifier.

[0065] Step 320: The production data during the manufacturing process of the battery cell based on the target electrode film roll is recorded in each of the first identifiers.

[0066] Optionally, the first identifier can be recorded in an electronic device, and each first identifier carries a location marker, which can be used to record the production data corresponding to the location marker.

[0067] Alternatively, the first identifier can also be engraved on the target electrode film roll.

[0068] For example, each first identifier represents a storage address, and by identifying the storage address, the production data stored at that storage address can be retrieved. For instance, the storage address can be obtained by parsing the first identifier, and the data recorded by the first identifier can be retrieved through that storage address.

[0069] The target electrode film roll can be up to 5,000 meters in size, and each first identifier can be used to record production data for different areas of the target electrode film roll.

[0070] For example, a first identifier corresponding to the data measured by the measuring device can be determined according to the production process of the target electrode film roll, and then the measured data can be recorded in the first identifier.

[0071] Taking the coating stage as an example, based on the moving speed of the conveyor mechanism controlling the movement of the target electrode film roll, the start time of the conveyor mechanism, and the installation position of the measuring equipment in the coating stage, it is determined what position of the target electrode film roll the measuring equipment in the coating area is measuring in real time. For example, if the conveyor speed is v1, the conveyor mechanism has been running for t01 hours, and the installation position of the measuring equipment in the coating stage is s1 from the starting position of the coating stage, it can be determined that the current testing position of the measuring equipment is at the position of the target electrode film roll, P1 = v1 * t01 - s1. Then, the currently measured data can be recorded in the first identifier of the "v1 * t01 - s1" position.

[0072] The recording principle for other stages can be similar to that of the coating stage. In the i-th target stage of battery cell manufacturing, the conveying speed of the conveying mechanism is vi, and the conveying mechanism has been running for t0i time. The installation position of the measuring device in the coating stage is si from the starting position of the coating stage. Therefore, the current testing position of the measuring device at the target electrode film roll is determined to be Pi = vi * t0i - si. Then, the currently measured data can be recorded at the first identifier of the "vi * t0i - si" position. Of course, if the conveying mechanism carrying the target electrode film roll is not moving at a constant speed, the formula for calculating the displacement of the target electrode film roll can be adjusted according to the actual movement.

[0073] Step 330: For any one of the multiple target cells constructed based on the target electrode film roll, determine the second identifier of the target cell according to the multiple first identifiers covered by the target cell.

[0074] Optionally, a second identifier for the target cell can be generated based on all data recorded in the first identifier record covered by the target battery.

[0075] For example, if a target cell is formed by winding a target electrode film roll of s0 meters, then a second identifier of the target cell can be generated based on all the data recorded by all the first identifiers within that s0 meters.

[0076] By identifying the second identifier, all data recorded by the first identifier within a range of s0 meters can be read. Of course, if the second identifier also records data other than production data, then identifying the second identifier will also allow the reading of that data.

[0077] Based on the above steps, by generating multiple first identifiers, production data at different locations on the electrode film roll can be recorded. This not only records the production information of the entire electrode film roll, but each first identifier can also record production information at specific locations on the electrode film roll. This more refined recording of the electrode film roll based on each first identifier allows for more accurate traceability information when tracing individual battery cells.

[0078] To facilitate the recording of the target electrode film roll, the first identifier can be directly displayed at different positions on the target electrode film roll, and this first identifier can be used to record the production data of its location. Based on this, step 310 may include: sending control commands to a laser engraving machine to control the laser engraving machine to engrave multiple first identifiers on the target electrode film roll.

[0079] The method in this embodiment can be derived from... Figure 1 The host computer shown can send control commands to the laser engraving machine as needed to control the laser engraving machine to engrave multiple first marks on the target electrode film roll.

[0080] The host computer can send control commands to the laser engraving machine directly or indirectly. For example, the host computer can also send control commands to the PLC controller that controls the laser engraving machine, and the PLC controller will then send control commands to the laser engraving machine to engrave multiple first marks on the target electrode film roll.

[0081] For example, step 310 may include: sending a control command from a PLC controller that controls the laser engraving machine to the laser engraving machine to control the laser engraving machine to engrave a first mark on the target electrode film roll.

[0082] The production data for each defined area of ​​the target electrode film roll recorded by the first identifier is determined by the position of the first identifier.

[0083] For example, a first mark is engraved at a position every meter on the target electrode film roll.

[0084] For example, multiple first marks are engraved at positions one meter, two meters, three meters, etc., from the edge of the target electrode film roll, with the distance from the edge being an integer number of meters.

[0085] For example, the laser engraving machine is installed in the coating work area, and the laser engraving machine can be installed at a position after the baking equipment in the coating stage, coating the target electrode film roll, and after baking, engraving the first mark on the target electrode film roll.

[0086] By engraving the first identifier onto the target electrode film roll, it is easy for the reading device to read the first identifier on the target electrode film roll in real time.

[0087] Optionally, sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks on the target electrode film roll area may include: sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks at equal intervals on the target electrode film roll.

[0088] By carving the first mark at equal intervals, each first mark can record production data within an area of ​​equal width.

[0089] The spacing between two adjacent first marks can be a pre-set fixed distance. For example, the spacing can be fifty centimeters, one meter, two meters, etc.

[0090] Optionally, the PLC controller can determine the moving distance of the target electrode film roll based on the encoder of the drive component of the conveying mechanism that moves the target electrode film roll, and determine the position to be engraved for the first mark based on the moving distance of the target electrode film roll. For example, if the spacing is fifty centimeters, the encoder can determine whether the moving distance of the target electrode film roll is fifty centimeters. If it has moved fifty centimeters from the previous engraving position, the next first mark can be engraved.

[0091] By setting the first identifier to be evenly spaced, the information recorded by each first identifier can be more uniform, and each first identifier can better represent the production data of the same size area of ​​the target electrode film roll.

[0092] Optionally, sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks at equal intervals on the target electrode film roll includes: determining the mark spacing according to the cell size to be produced from the target electrode film roll; sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks on the target electrode film roll; wherein the spacing between two adjacent first marks is the mark spacing.

[0093] For example, the larger the size of the battery cell to be produced, the larger the marking spacing can be; the smaller the size of the battery cell to be produced, the smaller the marking spacing can be.

[0094] By adapting the marking spacing to the size of the battery cells to be produced, the need for traceability of battery cell production data can be met while reducing the burden of recording data.

[0095] When the electrode moves at high speed, the position of the tab fluctuates significantly relative to the electrode film area, which can easily lead to code reading failures. Based on this research, it is possible to engrave the first identifier on the film area where the vibration is relatively smaller, so that the reading device can read the first identifier. Based on this, the above-mentioned engraving of multiple first identifiers on the film area of ​​the target electrode film roll includes: engraving multiple first identifiers on the film area of ​​the target electrode film roll.

[0096] The membrane region can refer to the area in the target electrode membrane roll coated with active material.

[0097] Please refer to Figure 4 As shown, Figure 4 A schematic diagram is shown showing the first identifier engraved on the membrane region of the target electrode membrane roll.

[0098] in, Figure 4 The membrane region Mr, the tab region Pe, the first identifier ID1, and the shear line L are shown. Figure 4 In the example shown, the target electrode film roll includes two rows of first identifiers ID1. In each row of first identifiers ID1, the spacing between two adjacent first identifiers ID1 is the same.

[0099] in, Figure 4 The upper portion of the electrode film roll shown can be wound into multiple battery cells, and the lower portion of the electrode film roll can also be wound into multiple battery cells. Each battery cell can be covered with multiple first markings.

[0100] exist Figure 4 In the example shown, the target electrode film roll includes two rows of first identifiers, each of which can record production data for its area.

[0101] By engraving the first identifier on the film area of ​​the target electrode film roll, the jitter of the first identifier during the movement of the target electrode film roll can be reduced, the success rate of reading the first identifier by the reading device can be improved, and the recording of production data can be achieved more accurately.

[0102] The battery cell production process typically involves multiple stages, each requiring different data recording. Therefore, production data for each stage can be recorded during its execution. Taking the battery cell production stages, including coating, cold pressing, and slitting, as an example... Figure 5 As shown, step 320 may include steps 321 to 323.

[0103] Step 321: Record the first production data of the target electrode film roll obtained during the coating stage in each of the first identifiers.

[0104] The first production data refers to the data of the target electrode film roll obtained from the coating stage test.

[0105] The first production data may include the width of the target electrode film roll, the thickness of the target electrode film roll, the coating processing time, and other data.

[0106] Step 322: Record the second production data of the target electrode film roll obtained during the cold pressing stage in each of the first identifiers.

[0107] The second production data refers to the data of the target electrode film roll obtained from the cold pressing stage test.

[0108] The second production data may also include data such as the width of the target electrode film roll, the thickness of the target electrode film roll, and the cold pressing time.

[0109] Step 323: Record the third production data of the target electrode film roll obtained from the slitting stage into each of the first identifiers.

[0110] The third production data refers to the data of the target electrode film roll obtained from the slitting stage test.

[0111] The third production data may also include data such as the width of the target electrode roll, the thickness of the target electrode roll, and the slitting processing time.

[0112] by Figure 4 In the example shown, the slitting stage can cut the target electrode film roll along the shear line L between the first row first mark and the second row first mark into two electrode film rolls, each of which can be used to wind into multiple battery cells.

[0113] This third production data may include the width of the target electrode film roll after shearing.

[0114] Optionally, after the slitting stage and winding into the target cell, if further processing of the cell is required, the production data generated during these processes can be recorded in the second identifier corresponding to each cell. In other words, the second identifier of the cell can record the data recorded by each first identifier, and may also include data from subsequent production processes.

[0115] Recording data on the target electrode film roll at each stage of production allows for more detailed information recorded by the first identifier, enabling more accurate tracing of the battery cell and pinpointing production details.

[0116] During the coating stage, a first mark can be engraved on the target electrode film roll after coating, and production data on the target electrode film roll can be recorded in each of the first marks during or after coating. Step 321 may include: after reading the nth first mark on the target electrode film roll, and before reading the (n+1)th first mark, recording the first production data of the real-time position of the target electrode film roll measured in the nth first mark.

[0117] The initial production data may include the width and thickness of the target electrode film roll. Of course, depending on the actual needs of the production workshop, the initial production data may also include other production data.

[0118] Where n is a positive integer greater than or equal to one and less than or equal to the total number of the first identifiers on the target electrode film roll.

[0119] Optionally, all first identifiers on the target electrode film roll can be read sequentially. After each first identifier is read, the first production data measured by the first measuring device in the coating stage is recorded in the first identifier until the next first identifier is read.

[0120] The production data obtained from the first measuring device test during the coating stage after reading the nth first identifier can be used as the data to be recorded for the nth first identifier; the production data obtained from the measuring device test during the coating stage after reading the (n+1)th first identifier can be used as the data to be recorded for the (n+1)th first identifier.

[0121] Optionally, the first mark may be engraved on the target electrode film roll. For any first mark on the target electrode film roll, first production data, which measures the engraving position of the first mark using a first measuring device, is recorded on the first mark.

[0122] For example, such as Figure 6 As shown, step 321 may include steps a1 to d1.

[0123] Step a1: Record the first time when the nth first identifier is read.

[0124] For example, the first time to read the nth first identifier is T1.

[0125] Step b1: Based on the distance between the reading device that reads the first identifier and the first measuring device that measures the real-time position of the target electrode film roll, determine the first time difference between measuring the first production data and reading the first identifier.

[0126] The distance between the reading device in the coating area and the first measuring device can be D1. If the speed of the conveying mechanism that moves the target electrode film roll is v1, then the first time difference can be expressed as: D1 / v1.

[0127] In other implementations, if the speed of the conveying mechanism that drives the target electrode film roll to move is non-uniform during the coating stage, the first time difference can be determined based on the actual movement of the conveying mechanism.

[0128] Step c1: Based on the first time difference, the first production data of the real-time position of the nth first-identified target electrode film roll is selected from the first production data obtained by the first measuring device.

[0129] If the first measuring device is installed behind the reading device in the coating work area, and the reading device in the coating work area is installed in front of the first measuring device (i.e., at any point on the target electrode film roll), the data first passes through the first measuring device, then moves by the first time difference D1 / v1, and then passes through the reading device. In other words, it can be understood that the first production data at the location of the first identifier is measured first, and the first identifier is read later.

[0130] Then the first production data measured by the first measuring device at time T1-D1 / v1 can be obtained, and the first production data measured at time T1-D1 / v1 is used as the first production data of the nth first identifier.

[0131] If the first measuring device is installed in front of the reading device in the coating work area, and the reading device in the coating work area is installed behind the first measuring device, that is, at any point on the target electrode film roll, the data passes through the reading device first, then moves by the first time difference D1 / v1, and then passes through the first measuring device again. In other words, it can be understood that the first identifier is read first, and the first production data at the position of the first identifier is measured later.

[0132] Then the first production data measured by the first measuring device at time T1+D1 / v1 can be obtained, and the first production data measured at time T1+D1 / v1 is used as the first production data of the nth first identifier.

[0133] Step d1: Record the first production data of the real-time position of the target electrode film roll in the nth first identifier.

[0134] After the first production data is recorded in the first identifier, the first production data can be obtained by reading the first identifier through a barcode reader.

[0135] Through the above steps, the first production data recorded in the coating stage can be recorded in the first identifier. The production data of different positions of the target electrode film roll in the coating stage can be traced through the first identifier, which can achieve more refined traceability.

[0136] During the cold pressing stage, production data of the target electrode film roll can be recorded in the first identifier during or after the cold pressing process. Step 322 may include, during the cold pressing stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, recording the second production data of the measured real-time position of the target electrode film roll in the nth first identifier.

[0137] The second production data may include the width and thickness of the target electrode film roll. Of course, depending on the actual needs of the production workshop, the second production data may also include other production data.

[0138] Optionally, all first identifiers on the target electrode film roll can be read sequentially. After each first identifier is read, the second production data measured by the measuring equipment during the cold pressing stage is recorded in the first identifier until the next first identifier is read.

[0139] Optionally, all first identifiers on the target electrode film roll can be read sequentially. After each first identifier is read, the second production data measured by the second measuring device during the cold pressing stage is recorded in the first identifier until the next first identifier is read.

[0140] If the first mark is engraved on the target electrode film roll, for any first mark on the target electrode film roll, second production data, which measures the engraving position of the first mark using a second measuring device, is recorded on the first mark.

[0141] For example, such as Figure 7 As shown, step 322 may include steps a2 to d2.

[0142] Step a2: Record the second time when reading the nth first identifier.

[0143] For example, the second time for reading the nth first identifier is T2.

[0144] Step b2: Based on the distance between the reading device that reads the first identifier and the second measuring device that measures the real-time position of the target electrode film roll, determine the second time difference between measuring the second production data and reading the first identifier.

[0145] The distance between the reading device in the cold pressing working area and the second measuring device can be D2. If the speed of the conveying mechanism that moves the target electrode film roll is v2, then the second time difference can be expressed as: D2 / v2.

[0146] In other implementations, if the speed of the conveying mechanism that drives the target electrode film roll to move is non-uniform during the cold pressing stage, the second time difference can be determined based on the actual movement of the conveying mechanism.

[0147] Step c2: Based on the second time difference, the real-time position of the nth first-identified target electrode film roll is selected from the second production data obtained by the second measuring device.

[0148] If the second measuring device is installed behind the reading device in the cold pressing working area, and the reading device in the cold pressing working area is installed in front of the second measuring device (i.e., at any point on the target electrode film roll), the data first passes through the second measuring device, then moves by the second time difference D2 / v2, and then passes through the reading device. In other words, it can be understood that the second production data at the location of the first identifier is measured first, and the first identifier is read later.

[0149] Then the second production data measured by the second measuring device at time T2-D2 / v2 can be obtained, and the second production data measured at time T2-D2 / v2 is used as the second production data of the nth first identifier.

[0150] If the second measuring device is installed in front of the reading device in the cold pressing working area, and the reading device in the cold pressing working area is installed behind the second measuring device, that is, at any point on the target electrode film roll, the data first passes through the reading device, then moves by the second time difference D2 / v2, and then passes through the second measuring device. In other words, it can be understood that the first identifier is read first, and the second production data at the location of the first identifier is measured later.

[0151] Then the second production data measured by the second measuring device at time T2+D2 / v2 can be obtained, and the second production data measured at time T2+D2 / v2 is used as the second production data of the nth first identifier.

[0152] Step d2: Record the second production data of the real-time position of the target electrode film roll in the nth first identifier.

[0153] Through the above steps, the second production data recorded during the cold pressing stage can be recorded in the first identifier. The production data at different positions of the target electrode film roll during the cold pressing stage can be traced through the first identifier, enabling more refined traceability.

[0154] During the slitting stage, the production data of the target electrode film roll can be recorded in each first identifier after slitting. Based on this, step 323 may include: during the slitting stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, recording the third production data of the real-time position of the target electrode film roll obtained by measurement in the nth first identifier.

[0155] For example, such as Figure 8 As shown, step 323 may include steps a3 to d3.

[0156] Step a3: Record the third time when reading the nth first identifier.

[0157] For example, the third time for reading the nth first identifier is T3.

[0158] Step b3: Based on the distance between the reading device that reads the first identifier and the second measuring device that measures the third production data of the real-time position of the target electrode film roll, determine the third time difference between measuring the third production data and reading the first identifier.

[0159] The distance between the reading device for the slitting working area and the third measuring device can be D3. If the speed of the conveying mechanism that moves the target electrode film roll is v3, then the third time difference can be expressed as: D3 / v3.

[0160] In other implementations, if the speed of the conveying mechanism that drives the target electrode film roll to move is non-uniform during the slitting stage, the second time difference can be determined based on the actual movement of the conveying mechanism.

[0161] Step c3: Based on the third time difference, the real-time position of the nth first-identified target electrode film roll is selected from the third production data obtained by the second measuring device.

[0162] If the third measuring device is installed behind the reading device in the slitting working area, and the reading device in the slitting working area is installed in front of the third measuring device, that is, at any point on the target electrode film roll, the data first passes through the third measuring device, then moves by the third time difference D3 / v3, and then passes through the reading device. In other words, it can be understood that the third production data at the location of the first identifier is measured first, and the first identifier is read later.

[0163] Then the third production data measured by the third measuring device at time T3-D3 / v3 can be obtained, and the third production data measured at time T3-D3 / v3 is used as the third production data of the nth first identifier.

[0164] If the third measuring device is installed in front of the reading device in the slitting working area, and the reading device in the slitting working area is installed behind the third measuring device, that is, at any point on the target electrode film roll, the data first passes through the reading device, then moves by the third time difference D3 / v3, and then passes through the third measuring device. In other words, it can be understood that the first identifier is read first, and the third production data at the position of the first identifier is measured later.

[0165] Then the third production data measured by the third measuring device at time T3+D3 / v3 can be obtained, and the third production data measured at time T3+D3 / v3 is used as the third production data of the nth first identifier.

[0166] Step d3: Record the third production data of the real-time position of the target electrode film roll in the nth first identifier.

[0167] Through the above steps, the third production data recorded during the cold pressing stage can be recorded in the first identifier. The production data at different positions of the target electrode film roll during the slitting stage can be traced through the first identifier, enabling more refined traceability.

[0168] During the winding stage, a single electrode film roll can be wound into multiple battery cells; each battery cell uses an electrode film roll whose production data is recorded by multiple first identifiers. Based on this, step 330 may include: during the winding process of any one of the multiple battery cells constructed based on the target electrode film roll, sequentially reading multiple target first identifiers corresponding to the target battery cell in the target electrode film roll to obtain target production data recorded by the multiple target first identifiers; and determining the second identifier of the target battery cell based on the target production data.

[0169] Taking a battery cell covered with p first identifiers as an example, the first identifiers corresponding to the electrode film rolls required for the target battery cell can be: the m-th first identifier to the (m+p)-th first identifier. Here, m and p are both positive integers, and m+p is less than N, where N is the total number of first identifiers contained on the target electrode film roll.

[0170] Then we can read the m-th first identifier to the (m+p)-th first identifier to obtain all the production data recorded by the m-th first identifier to the (m+p)-th first identifier.

[0171] Optionally, an initial identifier for the target cell can be generated; the target production data can be bound to the initial identifier to determine a second identifier for the target cell.

[0172] The initial identifier can be any identifier that can carry information, such as a QR code, barcode, or string.

[0173] By aggregating all production data of a battery cell onto a second identifier, all production data of the target battery cell can be obtained from that second identifier, reducing the workload of relevant personnel and making it easier to obtain all production data of the target battery cell.

[0174] The following is in conjunction with the appendix Figure 9 Taking this as an example, the method for recording battery cell information is described to realize production information during the battery cell production process:

[0175] Figure 9 Taking any manufacturing stage as an example, the barcode reader 121 is installed in the first position, and the measuring device 140 is installed in the second position. The distance between the barcode reader 121 and the measuring device 140 is ten meters, and the moving direction of the conveying mechanism 150 that drives the target electrode film roll 160 is Dr1. The distance of ten meters between the barcode reader 121 and the measuring device 140 can be understood as the distance the target electrode film roll 160 needs to move from the measuring device 140 to the barcode reader 121.

[0176] Based on the current state of the equipment, for any point on the target electrode film roll, the point is first measured by the measuring device 140, and then moved ten meters to the code reader 121, which can read the first identifier of the point.

[0177] Furthermore, such as Figure 9 As shown, the drive assembly controlling the movement of the conveying mechanism may further include an encoder 170, the data of which can be used to represent the rotation data of the drive assembly. This rotation data can be used to characterize the distance the target electrode film roll has moved.

[0178] In one example, if the barcode reader 121 reads a first identifier at 8:00, and the target electrode film roll currently recorded by the encoder 170 is 20 meters away, then the reading time of 10 meters before the encoder 170 reads 20 meters away can be determined to be 7:58. Then the data obtained by the measuring device 140 at 7:58 can be obtained and recorded in the first identifier read by the barcode reader 121 at 8:00.

[0179] Of course, if the transmission mechanism 150 moves faster, the data measured at a certain time between 7:58 and 8:00 will be recorded in the first identifier read by the code reader 121 at 8:00.

[0180] Of course, if the movement speed of the transmission mechanism 150 is slower, the data measured at a certain moment before 7:58 will be recorded in the first identifier read by the code reader 121 at 8:00.

[0181] In this embodiment, laser engraving of markings at equal intervals on the film area of ​​the target electrode film roll allows for precise data binding to each marking corresponding to the film area. This enables traceability of individual battery cells, providing a technical foundation for further improving the traceability capability and quality control of power battery cells. Furthermore, laser engraving of QR code markings on the film area of ​​the electrode film roll ensures both clear and readable markings and prevents the loss of QR code information during production due to electrode die-cutting, thus improving the stability of the recorded data. Moreover, combining the scanning time of the barcode reader with the real-time operating speed of the conveyor mechanism automatically matches the equipment measurement data at the barcode reading points, achieving precise binding of equipment measurement data.

[0182] Based on the same application concept, this application also provides a battery information recording device corresponding to the battery information recording method. Since the principle of the device in this application is similar to that of the aforementioned battery information recording method, the implementation of the device in this application can refer to the description in the above-mentioned method embodiments, and the repeated parts will not be described again.

[0183] Please see Figure 10 This is a functional module diagram of the battery cell information recording device provided in this application embodiment. Each module in the battery cell information recording device in this embodiment is used to execute the steps in the above method embodiments. The battery cell information recording device includes: a generation module 410, a recording module 420, and a determination module 430; wherein the contents of each module are as follows:

[0184] The generation module 410 is used to generate multiple first identifiers for a target electrode film roll, each of which is used to record its production data in a defined area of ​​the target electrode film roll.

[0185] The recording module 420 is used to record production data during the process of manufacturing a battery cell based on the target electrode film roll in each of the first identifiers;

[0186] The determination module 430 is used to determine the second identifier of any target cell among multiple target cells constructed based on the target electrode film roll, according to the multiple first identifiers covered by the target cell.

[0187] In one possible implementation, the generation module 410 is used to send control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks on the target electrode film roll; wherein the production data of the defined area of ​​the target electrode film roll recorded by the first mark is determined by the position of the first mark.

[0188] In one possible implementation, the generation module 410 is used to send control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks at equal intervals on the target electrode film roll.

[0189] In one possible implementation, the generation module 410 is used to determine the marking spacing according to the cell size to be produced from the target electrode film roll; and to send control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first markings on the target electrode film roll, wherein the spacing between two adjacent first markings is the marking spacing.

[0190] In one possible implementation, the generation module 410 is used to engrave a plurality of first identifiers in the membrane region of the target electrode film roll.

[0191] In one possible implementation, the recording module 420 includes: a first recording unit, a second recording unit, and a third recording unit.

[0192] The first recording unit is used to record the first production data of the target electrode film roll obtained by the coating stage in each of the first identifiers;

[0193] The second recording unit is used to record the second production data of the target electrode film roll obtained during the cold pressing stage in each of the first identifiers;

[0194] The third recording unit is used to record the third production data of the target electrode film roll obtained from the slitting stage in each of the first identifiers.

[0195] In one possible implementation, the first recording unit is configured to, during the coating stage, read the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, record the first production data of the real-time position of the target electrode film roll measured in the nth first identifier; wherein, n is a positive integer greater than or equal to one and less than or equal to the total number of the first identifiers on the target electrode film roll.

[0196] In one possible implementation, the first recording unit is configured to: record the first time of reading the nth first identifier during the coating stage; determine the first time difference between measuring the first production data and reading the first identifier based on the distance between the reading device that reads the first identifier and the first measuring device that measures the real-time position of the target electrode film roll; filter the first production data of the real-time position of the target electrode film roll with the nth first identifier from the first production data measured by the first measuring device based on the first time difference; and record the first production data of the real-time position of the target electrode film roll in the nth first identifier.

[0197] In one possible implementation, the second recording unit is used to record the second production data of the measured real-time position of the target electrode film roll in the nth first identifier after reading the nth first identifier on the target electrode film roll during the cold pressing stage and before reading the (n+1)th first identifier.

[0198] In one possible implementation, the second recording unit is configured to: record, during the cold pressing stage, a second time for reading the nth first identifier; determine a second time difference between measuring the second production data and reading the first identifier based on the distance between the reading device that reads the first identifier and the second measuring device that measures the real-time position of the target electrode film roll; based on the second time difference, filter out the second production data of the real-time position of the target electrode film roll with the nth first identifier from the second production data measured by the second measuring device; and record the second production data of the real-time position of the target electrode film roll in the nth first identifier.

[0199] In one possible implementation, the third recording unit is used to record the third production data of the real-time position of the target electrode film roll measured in the nth first identifier after reading the nth first identifier on the target electrode film roll during the slitting stage and before reading the (n+1)th first identifier.

[0200] In one possible implementation, the third recording unit is configured to, during the slitting stage, record a third time for reading the nth first identifier; determine a third time difference between measuring the third production data and reading the first identifier based on the distance between the reading device that reads the first identifier and the second measuring device that measures the real-time position of the target electrode film roll; based on the third time difference, filter out the third production data of the real-time position of the target electrode film roll with the nth first identifier from the third production data measured by the second measuring device; and record the third production data of the real-time position of the target electrode film roll in the nth first identifier.

[0201] In one possible implementation, the determining module 430 is used to sequentially read multiple target first identifiers corresponding to the target cell in the target electrode film roll during the winding process of any one of the multiple target cells constructed based on the target electrode film roll, so as to obtain target production data recorded by the multiple target first identifiers; and determine the second identifier of the target cell based on the target production data.

[0202] In one possible implementation, the determining module 430 is used to generate an initial identifier for the target battery cell; and to bind the target production data with the initial identifier to determine a second identifier for the target battery cell.

[0203] Furthermore, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the cell information recording method described in the above method embodiments.

[0204] The computer program product of the battery cell information recording method provided in this application includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the steps of the battery cell information recording method described in the above method embodiments. For details, please refer to the above method embodiments, which will not be repeated here.

[0205] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0206] In addition, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0207] If the aforementioned functions are implemented as software functional modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0208] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0209] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for recording battery cell information, characterized in that, include: For a target electrode film roll, a plurality of first identifiers are generated; wherein each first identifier is used to record its production data in a defined area of ​​the target electrode film roll; the plurality of first identifiers are disposed in the film area of ​​the target electrode film roll, the film area representing the area in the target electrode film roll coated with active material; Production data during the manufacturing process of the battery cell based on the target electrode film roll is recorded in each of the first identifiers; For any one of the multiple target cells constructed based on the target electrode film roll, a second identifier of the target cell is determined according to the multiple first identifiers covered by the target cell.

2. The method according to claim 1, characterized in that... ； The production data includes: first production data, second production data, and third production data; The process of recording production data during the manufacturing of battery cells based on the target electrode film roll in each of the first identifiers includes: The first production data of the target electrode film roll obtained during the coating stage is recorded in each of the first identifiers; The second production data of the target electrode film roll obtained during the cold pressing stage is recorded in each of the first identifiers; The third production data of the target electrode film roll obtained during the slitting stage is recorded in each of the first identifiers.

3. The method according to claim 2, characterized in that, The first production data of the target electrode film roll obtained from the coating stage is recorded in each of the first identifiers, including: During the coating stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, the first production data of the real-time position of the target electrode film roll is recorded in the nth first identifier; where n is a positive integer greater than or equal to one and less than or equal to the total number of the first identifiers on the target electrode film roll.

4. The method according to claim 3, characterized in that, The step of recording the first production data of the measured real-time position of the target electrode film roll in the nth first identifier includes: During the coating stage, the first time of reading the nth first identifier is recorded; The first time difference between measuring the first production data and reading the first identifier is determined based on the distance between the reading device that reads the first identifier and the first measuring device that measures the real-time position of the target electrode film roll. Based on the first time difference, the first production data that filters out the real-time position of the nth first-identified target electrode film roll from the first production data obtained by the first measuring device; The first production data of the real-time position of the target electrode film roll is recorded in the nth first identifier.

5. The method according to claim 2, characterized in that, The second production data obtained during the cold pressing stage of the target electrode film roll is recorded in each of the first identifiers, including: During the cold pressing stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, the second production data of the real-time position of the target electrode film roll is recorded in the nth first identifier.

6. The method according to claim 5, characterized in that, The second production data, which records the measured real-time position of the target electrode film roll in the nth first identifier, includes: During the cold pressing stage, record the second time when the nth first identifier is read; The second time difference between measuring the second production data and reading the first identifier is determined based on the distance between the reading device that reads the first identifier and the second measuring device that measures the real-time position of the target electrode film roll. Based on the second time difference, the real-time position of the nth first-identified target electrode film roll is selected from the second production data obtained by the second measuring device. The second production data of the real-time position of the target electrode film roll is recorded in the nth first identifier.

7. The method according to claim 2, characterized in that, The third production data of the target electrode film roll obtained from the slitting stage is recorded in each of the first identifiers, including: During the slitting stage, after reading the nth first identifier on the target electrode film roll and before reading the (n+1)th first identifier, the third production data of the real-time position of the target electrode film roll is recorded in the nth first identifier.

8. The method according to claim 7, characterized in that, The third production data, which records the real-time position of the target electrode film roll obtained from measurement, in the nth first identifier, includes: During the segmentation phase, the third time when the nth first identifier is read is recorded; The third time difference between measuring the third production data and reading the first identifier is determined based on the distance between the reading device that reads the first identifier and the second measuring device that measures the third production data of the target electrode film roll in real time. Based on the third time difference, the real-time position of the nth first-identified target electrode film roll is selected from the third production data obtained by the second measuring device. The third production data of the real-time position of the target electrode film roll is recorded in the nth first identifier.

9. The method according to claim 2, characterized in that, The first production data includes the thickness of the target electrode film roll during the coating stage; the second production data includes the thickness of the target electrode film roll during the cold pressing stage; and the third production data includes the thickness of the target electrode film roll during the slitting stage.

10. The method according to claim 1, characterized in that, For the target electrode film roll, multiple first identifiers are generated, including: A control command is sent to the laser engraving machine to control the laser engraving machine to engrave multiple first marks on the target electrode film roll, wherein the production data of the defined area of ​​the target electrode film roll recorded by the first mark is determined by the position of the first mark.

11. The method according to claim 10, characterized in that, Sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first markings on the target electrode film roll includes: Send control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first marks at equal intervals on the target electrode film roll.

12. The method according to claim 11, characterized in that, Sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first markings at equal intervals on the target electrode film roll includes: The marking spacing is determined based on the required cell size to be produced from the target electrode film roll; A control command is sent to the laser engraving machine to control the laser engraving machine to engrave multiple first marks on the target electrode film roll; wherein the distance between two adjacent first marks is the mark spacing.

13. The method according to claim 10, characterized in that, Sending control commands to the laser engraving machine to control the laser engraving machine to engrave multiple first markings on the target electrode film roll includes: A control command is sent to the laser engraving machine, the control command being used to control the laser engraving machine to engrave multiple first marks on the film area of ​​the target electrode film roll.

14. The method according to claim 1, characterized in that, The first identifier is an identifier engraved on the target electrode film roll.

15. The method according to claim 1, characterized in that, For any one of the multiple battery cells constructed based on the target electrode film roll, the second identifier of the target battery cell is determined according to the multiple first identifiers covered by the target battery cell, including: During the winding process of any one of the multiple battery cells constructed based on the target electrode film roll, multiple target first identifiers corresponding to the target battery cell in the target electrode film roll are read sequentially to obtain the target production data recorded by the multiple target first identifiers; Based on the target production data, a second identifier for the target battery cell is determined.

16. The method according to claim 15, characterized in that, The step of determining the second identifier of the target battery cell based on the target production data includes: Generate the initial identifier for the target battery cell; The target production data is bound to the initial identifier to determine the second identifier of the target cell.

17. A battery cell information recording device, characterized in that, include: A generation module is used to generate multiple first identifiers for a target electrode film roll; wherein each first identifier is used to record its production data in a defined area of ​​the target electrode film roll; the multiple first identifiers are disposed in the film area of ​​the target electrode film roll, the film area representing the area in the target electrode film roll coated with active material; The recording module is used to record production data during the process of manufacturing battery cells based on the target electrode film roll in each of the first identifiers; The determination module is used to determine the second identifier of any target cell among multiple target cells constructed based on the target electrode film roll, according to the multiple first identifiers covered by the target cell.

18. An electronic device, characterized in that, include: The processor and memory, wherein the memory stores machine-readable instructions executable by the processor, wherein when the electronic device is running, the machine-readable instructions are executed by the processor to perform the steps of the method as described in any one of claims 1 to 16.

19. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of the method as described in any one of claims 1 to 16.

20. A battery cell information recording system, characterized in that, The system applied to the cell information recording method according to any one of claims 1-16 includes: an identifier generator, a reading device, and a host computer; The identifier generator is used to generate multiple first identifiers corresponding to the electrode film roll; The reading device is used to read multiple first identifiers corresponding to the electrode film roll; The host computer is used to record the production data during the process of manufacturing battery cells from electrode film rolls in each of the first identifiers.

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