Method, apparatus, and computer readable storage medium for data measurement

Abstract

The embodiment of the present application provides a kind of data measurement method, device and computer readable storage medium, can realize the evaluation of the measurement fluctuation of measurement system with lower production cost, to improve the battery performance.The method comprises: obtaining at least two groups of measurement values of pole piece by measurement system, the at least two groups of measurement values include a type of measurement value, the pole piece includes at least two regions, the at least two groups of measurement values include the measurement value of the at least two regions, the interval between two adjacent regions in the at least two regions is less than or equal to first preset value;According to the at least two groups of measurement values, determine the measurement fluctuation of the measurement system.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a method, apparatus and computer-readable storage medium for data measurement. Background Technology

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. In this context, electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. And for electric vehicles, battery technology is a crucial factor in their development.

[0003] The battery manufacturing process is quite complex, involving multiple steps. Among them, the die-cutting and slitting process is an indispensable part, as it has a crucial impact on battery performance. Summary of the Invention

[0004] This application provides a data measurement method, apparatus, and computer-readable storage medium that enables the assessment of measurement variability of a measurement system at a lower production cost, thereby improving battery performance.

[0005] In a first aspect, a data measurement method is provided, the method comprising: acquiring at least two sets of measurement values ​​of an electrode through a measurement system, the at least two sets of measurement values ​​including a type of measurement value, the electrode including at least two regions, the at least two sets of measurement values ​​including measurement values ​​of the at least two regions, the spacing between two adjacent regions in the at least two regions being less than or equal to a first preset value; and determining the measurement variability of the measurement system based on the at least two sets of measurement values.

[0006] In this embodiment, when it is necessary to determine the variability of the measurement system, for the same type of measurement value, the electrode includes at least two regions, and the distance between two adjacent regions is less than a first preset value, that is, the distance between two adjacent regions is sufficiently small, so that the at least two regions can be considered as similar regions, and the measurement values ​​obtained on these at least two regions can be considered as measurement values ​​of the same sample. In this way, MSA evaluation can be completed during the normal production process of the electrode, reducing the waste of production materials such as the electrode, reducing the time spent on MSA evaluation, and greatly reducing the production cost of the electrode.

[0007] In some possible implementations, acquiring at least two sets of measurement values ​​of the electrode through the measurement system includes: acquiring the at least two sets of measurement values ​​through the measurement system during one transfer of the electrode.

[0008] At least two sets of measurements are acquired during a single electrode transfer, eliminating the need for electrode rewinding, which would require a slower electrode speed. Therefore, this technical solution avoids slowing down the electrode production process and meets timeliness requirements.

[0009] In some possible implementations, the first preset value is one pixel.

[0010] Since CCDs typically acquire data in units of pixels, the above technical solution sets the first preset value to one pixel, meaning that there is a one-pixel interval between two adjacent regions. This minimizes the distance between two adjacent regions, ensuring sufficient consistency of the electrode plates in at least two regions, thus minimizing the difference between the acquired at least two sets of measurements.

[0011] In some possible implementations, the method further includes: acquiring measurement data of a standard component, wherein acquiring at least two sets of measurement values ​​of the electrode through the measurement system includes: acquiring the at least two sets of measurement values ​​through the measurement system after determining that the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard component.

[0012] The above technical solution, on the one hand, firstly determines whether the accuracy of the measurement system meets the accuracy requirements before acquiring at least two sets of measurement values ​​for the electrode. Only when the accuracy of the measurement system meets the accuracy requirements is the at least two sets of measurement values ​​acquired through the measurement system obtained. In this way, the accuracy of the acquired at least two sets of measurement values ​​for the electrode is relatively high. On the other hand, the accuracy of the measurement system is determined by measuring data from standard parts. Since standard parts are almost unaffected by the environment, the influence of environmental factors on the determination of the accuracy of the measurement system is reduced.

[0013] In some possible implementations, the measurement data of the standard component includes multiple sets of measurement data, which include one type of measurement data. The multiple sets of measurement data include measurement data for at least one gradient, and each gradient in the at least one gradient measurement data includes multiple measurement data. For one type of measurement data, the standard component includes multiple regions, and the multiple measurement data includes measurement data for the multiple regions. The distance between two adjacent regions in the multiple regions is less than a second preset value.

[0014] The above technical solution acquires measurement data of standard parts through a nested approach. Specifically, for the same type of measurement value, the standard part includes at least two regions, and the distance between any two adjacent regions is less than a second preset value. This means the distance between adjacent regions is sufficiently small to be considered as close regions, and the measurement data obtained from these at least two regions can be considered as measurement data from the same sample. This reduces the time required to acquire measurement data of standard parts and improves the efficiency of determining the accuracy of the measurement system.

[0015] In some possible implementations, the method further includes: determining that the accuracy of the measurement system meets the accuracy requirements if the offset between the average value of the plurality of measurement data for each gradient and the reference value of the corresponding gradient is within a preset range.

[0016] The above technical solution determines that the accuracy of the measurement system meets the accuracy requirements when the offset between the average value of multiple measurement data of each gradient and the reference value of the corresponding gradient is within a preset range. That is, the accuracy analysis of the measurement system is performed by linear offset, which is not only simple to implement but also has a high accuracy.

[0017] In some possible implementations, the standard component is determined based on the measurement parameters of the electrode.

[0018] The above technical solution determines the standard part based on the measurement parameters of the electrode, which makes the consistency between the determined standard part and the electrode high. In this way, the accuracy of the measurement system is determined based on the measurement data of the standard part, and the accuracy of at least two sets of measurement values ​​of the electrode obtained by the measurement system is high.

[0019] In some possible implementations, the standard component includes the grayscale information and size information of the electrode.

[0020] The above technical solution sets the standard part to include the grayscale information and size information of the electrode, so that the consistency between the determined standard part and the electrode is high. In this way, the accuracy of the measurement system is determined based on the measurement data of the standard part, and the accuracy of at least two sets of measurement values ​​of the electrode obtained by the measurement system is high.

[0021] In some possible implementations, the size of the standard part is greater than or equal to the size of the electrode in the length direction, and the size of the standard part is greater than or equal to the size of the electrode in the width direction.

[0022] In the above technical solution, the dimensions of the standard part are set to be greater than or equal to the dimensions of the electrode in both the length and width directions. That is, the measurement range of the standard part can cover the measurement range of the electrode. In this way, not only can the measurement be carried out normally, but the accuracy of the measured data is also high.

[0023] In some possible implementations, the material of the standard component includes a flexible material.

[0024] Since the die-cutting machine includes a large number of rollers in the die-cutting and slitting process, the above technical solution sets the material of the standard part to include a flexible material. In this way, when the standard part passes through the rollers in the die-cutting machine, the probability of the standard part being affected by the rollers, such as being crushed by the rollers, is reduced to a certain extent.

[0025] In some possible implementations, the material of the standard component includes steel strip or film.

[0026] Since steel strips are less affected by the environment, the standard parts in the above technical solution include steel strips, which greatly reduces the impact of the environment on the standard parts. Furthermore, film is relatively stable, has sufficiently small shrinkage, and high printing accuracy. Therefore, including film in the standard parts of the above technical solution can improve the performance of the standard parts, thereby improving the efficiency of determining the accuracy of the measurement system.

[0027] In some possible implementations, the measurement system includes a charge-coupled device (CCD) and / or an encoder, wherein the CCD is used to measure the dimension of the electrode in the width direction and the encoder is used to measure the dimension of the electrode in the length direction.

[0028] Secondly, a data measurement apparatus is provided, comprising: an acquisition unit for acquiring at least two sets of measurement values ​​of an electrode through a measurement system, the at least two sets of measurement values ​​including a type of measurement value, the electrode including at least two regions, the at least two sets of measurement values ​​including measurement values ​​of the at least two regions, and the spacing between two adjacent regions in the at least two regions being less than or equal to a first preset value; and a determination unit for determining the measurement fluctuation of the measurement system based on the at least two sets of measurement values.

[0029] In some possible implementations, the acquisition unit is specifically used to: acquire the at least two sets of measurement values ​​through the measurement system during one transfer of the electrode.

[0030] In some possible implementations, the first preset value is one pixel.

[0031] In some possible implementations, the acquisition unit is further configured to: acquire measurement data of a standard part; specifically, the acquisition unit is configured to: acquire the at least two sets of measurement values ​​through the measurement system when the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard part.

[0032] In some possible implementations, the measurement data of the standard component includes multiple sets of measurement data, which include one type of measurement data. The multiple sets of measurement data include measurement data for at least one gradient, and each gradient in the at least one gradient measurement data includes multiple measurement data. For one type of measurement data, the standard component includes multiple regions, and the multiple measurement data includes measurement data for the multiple regions. The distance between two adjacent regions in the multiple regions is less than a second preset value.

[0033] In some possible implementations, the determining unit is further configured to: determine that the accuracy of the measurement system meets the accuracy requirements if the offset between the average value of the plurality of measurement data for each gradient and the reference value of the corresponding gradient is within a preset range.

[0034] In some possible implementations, the standard component is determined based on the measurement parameters of the electrode.

[0035] In some possible implementations, the standard component includes the grayscale information and size information of the electrode.

[0036] In some possible implementations, the size of the standard part is greater than or equal to the size of the electrode in the length direction, and the size of the standard part is greater than or equal to the size of the electrode in the width direction.

[0037] In some possible implementations, the material of the standard component includes a flexible material.

[0038] In some possible implementations, the material of the standard component includes steel strip or film.

[0039] In some possible implementations, the measurement system includes a charge-coupled device (CCD) and / or an encoder, wherein the CCD is used to measure the dimension of the electrode in the width direction and the encoder is used to measure the dimension of the electrode in the length direction.

[0040] Thirdly, a data measurement apparatus is provided, including a processor and a memory, the memory for storing a computer program, and the processor for calling the computer program to execute the methods described in the first aspect or its various implementations.

[0041] Fourthly, a computer-readable storage medium is provided for storing a computer program that causes a computer to perform the methods described in the first aspect or its various implementations. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0043] The accompanying drawings are not drawn to scale.

[0044] Figure 1 This is a schematic diagram of the data acquired by current CCDs and encoders.

[0045] Figure 2 This is a schematic flowchart of a data measurement method according to an embodiment of this application.

[0046] Figure 3 This is a schematic diagram illustrating the acquisition of data by a CCD and encoder according to an embodiment of this application.

[0047] Figure 4 This is a schematic diagram of a cathode standard component according to an embodiment of this application.

[0048] Figure 5 This is a schematic diagram of an anode standard part according to an embodiment of this application.

[0049] Figure 6 This is a schematic block diagram of a data measurement apparatus according to an embodiment of this application.

[0050] Figure 7 This is a schematic block diagram of a data measurement apparatus according to an embodiment of this application. Detailed Implementation

[0051] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0054] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0055] With the development of new energy technologies, the application fields of batteries are becoming increasingly widespread. For example, batteries can serve as the main power source for electrical devices (such as vehicles, ships, or spacecraft). It should be understood that the battery mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity.

[0056] Optionally, the battery can be a power storage battery. In terms of battery type, it can be a lithium-ion battery, lithium metal battery, lead-acid battery, nickel-metal hydride battery, lithium-sulfur battery, lithium-air battery, or sodium-ion battery, etc., and no specific limitation is made in this application embodiment. In terms of battery size, the battery in this application embodiment can be a cell / battery unit, or a battery module or battery pack, and no specific limitation is made in this application embodiment.

[0057] The battery manufacturing process is quite complex, involving multiple steps such as mixing, coating, rolling, die-cutting and slitting, winding, electrolyte injection, and formation. Among these, the die-cutting and slitting process is an indispensable step, significantly impacting battery performance. The die-cutting process uses a die-cutting machine to form the tabs of the battery cells, while the slitting process continuously cuts a wide roll of electrode sheets into several sheets of the required width.

[0058] Currently, in the die-cutting and slitting process, line-scanning charge-coupled devices (CCDs) are typically used to measure the relevant dimensions in the width direction of the electrode sheets, while encoders are used to measure the relevant dimensions in the length direction of the electrode sheets. Figure 1 A schematic diagram of a tab is shown. The tab comprises several parts, from bottom to top: the film region, the insulating layer (i.e., AT11), and the tab itself. CCDs typically use a line scan camera; as the electrode moves past the line scan camera, the camera captures a new pixel line, such as... Figure 1 As shown in the detection box b, the software on the vision processor or image acquisition card can store the data acquired each time and then reconstruct the final 2D image from the stored data. The encoder acquires data in a similar way to a CCD, acquiring only one pixel line at a time, such as... Figure 1 The detection box for 'e' in the image is shown, thus obtaining a data point, as follows: Figure 1 The distance h between the electrodes.

[0059] In some scenarios, measurement system analysis (MSA) is required to evaluate measurement systems (i.e., CCDs and / or encoders), such as assessing measurement accuracy. MSA requires that the measured object be repeatable and testable. For example, the distance h between electrodes needs to be measured three times. However, in the die-cutting and slitting process, electrodes are cut into multiple parts, and many electrodes are not suitable for repeatable testing. Alternatively, some electrodes may need to be rewound for repeatable testing. However, the rewinding speed is slow, for example, as low as 5 meters per minute (m / min), resulting in a long MSA evaluation time and low efficiency.

[0060] Based on this, this application proposes a data measurement method that characterizes the measurement variability of a measurement system by acquiring at least two sets of measurement values ​​of an electrode. The at least two sets of measurement values ​​include one type of measurement value. For each type of measurement value, the electrode includes at least two regions. The at least two sets of measurement values ​​include measurement values ​​from at least two regions. The distance between any two adjacent regions within the at least two regions is less than or equal to a first preset value. Using this method, when it is necessary to determine the variability of the measurement system, for the same type of measurement value, the electrode includes at least two regions, and the distance between any two adjacent regions within these at least two regions is less than the first preset value. That is, the distance between any two adjacent regions is sufficiently small, so these at least two regions can be considered as similar regions, and the measurement values ​​obtained from these at least two regions can be considered as measurement values ​​from the same sample. Thus, MSA evaluation can be completed during the normal production process of the electrode, reducing waste of production materials such as the electrode, reducing the time required for MSA evaluation, and significantly reducing the production cost of the electrode.

[0061] Figure 2 A schematic flowchart of a data measurement method 200 according to an embodiment of this application is shown. Figure 2 As shown, method 200 may include at least some of the following.

[0062] S210: Obtain at least two sets of measurement values ​​for the electrode through a measurement system. The at least two sets of measurement values ​​include a type of measurement value. The electrode includes at least two regions. The at least two sets of measurement values ​​include measurement values ​​for at least two regions. The distance between two adjacent regions in the at least two regions is less than or equal to a first preset value.

[0063] S220: Determine the measurement variability of the measurement system based on at least two sets of measurements.

[0064] It should be noted that, in the embodiments of this application, the measurement fluctuation of the measurement system can also be referred to as the accuracy of the measurement system.

[0065] In this embodiment, when it is necessary to determine the variability of the measurement system, for the same type of measurement value, the electrode includes at least two regions, and the distance between two adjacent regions is less than a first preset value, that is, the distance between two adjacent regions is sufficiently small, so that the at least two regions can be considered as similar regions, and the measurement values ​​obtained on these at least two regions can be considered as measurement values ​​of the same sample. In this way, MSA evaluation can be completed during the normal production process of the electrode, reducing the waste of production materials such as the electrode, reducing the time spent on MSA evaluation, and greatly reducing the production cost of the electrode.

[0066] Alternatively, the measurement system may include, for example, a CCD and / or an encoder.

[0067] like Figure 3 As shown, the electrode includes a film region, AT11, and tabs. The grayscale values ​​of different parts can be different. For example, the grayscale value of the film region can be 100% grayscale, the grayscale value of AT11 can be 50% grayscale, and the grayscale value of the tabs can be 25% grayscale. Measurement values ​​can include various types, such as the width of the film region, the width of the tabs, or the width of AT11, which can be obtained using a CCD. Alternatively, measurement values ​​can include, for example, the distance between two tabs, which can be measured using an encoder.

[0068] It should be understood that the width mentioned in the embodiments of this application can be... Figure 3 Y direction.

[0069] Refer again Figure 3 For a given type of measurement, the electrode may include at least two regions. For example, if the measurement includes the width of the membrane region, then in the length direction (i.e., the X direction) of the electrode, the electrode includes three regions: region a, region b, and region c. At least two sets of measurements include the measurement values ​​for region a, region b, and region c. If the measurement includes the spacing between the tabs, then in the length direction of the electrode, for each tab, the electrode includes three regions: region d, region e, and region f. At least two sets of measurements include the spacing between regions d of the two tabs, the spacing between regions e of the two tabs, and the spacing between regions f of the two tabs.

[0070] Optionally, the first preset value can be, for example, at least one pixel. For instance, the first preset value can be one pixel.

[0071] Since CCDs typically acquire data in units of pixels, the above technical solution sets the first preset value to one pixel, meaning that there is a one-pixel interval between two adjacent regions. This minimizes the distance between two adjacent regions, ensuring sufficient consistency of the electrode plates in at least two regions, thus minimizing the difference between the acquired at least two sets of measurements.

[0072] In some embodiments, acquiring at least two sets of measurement values ​​of an electrode through a measurement system may include acquiring the at least two sets of measurement values ​​through a measurement system during one transfer of the electrode.

[0073] At least two sets of measurements are acquired during a single electrode transfer, eliminating the need for electrode rewinding, which would require a slower electrode speed. Therefore, this technical solution avoids slowing down the electrode production process and meets timeliness requirements.

[0074] After obtaining at least two sets of measurements of the electrode, a series of calculations can be performed on these at least two sets of measurements to determine the measurement variability of the measurement system.

[0075] As mentioned earlier, a CCD can be used to measure the width of an electrode, while an encoder can be used to measure its length. During the measurement process, the encoder sends a pulse signal to the CCD, which then acquires data for one pixel line.

[0076] The installation and fixation of the encoder can affect the measurement accuracy, therefore, accuracy analysis of the encoder is necessary. Furthermore, CCDs are non-standard devices, and accuracy analysis methods are typically also required for them.

[0077] Therefore, the accuracy of the measurement system needs to be tested before obtaining at least two sets of measurements for the electrode. Only after confirming that the accuracy of the measurement system meets the accuracy requirements should at least two sets of test values ​​be obtained using the measurement system. This ensures a high accuracy rate for obtaining at least two sets of measurements for the electrode.

[0078] Electrodes are typically not long-term storage devices. Therefore, in some implementations, the accuracy of the measurement system can be tested based on standard components. Specifically, standard components can be connected to the measurement system to test its accuracy. For example, standard components can be connected to the measurement system by attaching them to the electrodes.

[0079] Prior to this, users can develop standard parts. It should be understood that, in the embodiments of this application, standard parts may also be referred to as contouring masters or other names.

[0080] In some embodiments, users can develop standard parts based on the production characteristics of the electrode. For example, standard parts can be developed based on measurement parameters of the electrode. For instance, if the measurement parameter includes the width of the film region, a standard part can be developed based on the width of the film region. Similarly, if the measurement parameter includes the width of the adhesive coating, a standard part can be developed based on the width of the adhesive coating.

[0081] The above technical solution determines the standard part based on the measurement parameters of the electrode, which makes the consistency between the determined standard part and the electrode high. In this way, the accuracy of the measurement system is determined based on the measurement data of the standard part, and the accuracy of at least two sets of measurement values ​​of the electrode obtained by the measurement system is high.

[0082] Furthermore, considering that the size of the CCD electrode is measured by edge-following based on the grayscale differences in the image, i.e., determining different parts of the electrode based on grayscale, the corresponding measurement value is then determined by multiplying the number of pixels between two edges by the size of a single pixel. Therefore, the standard part can include both grayscale and size information of the electrode.

[0083] This technical solution sets the standard part to include the grayscale information and size information of the electrode, so that the consistency between the determined standard part and the electrode is high. In this way, the accuracy of the measurement system is determined based on the measurement data of the standard part, and the accuracy of at least two sets of measurement values ​​of the electrode obtained by the measurement system is high.

[0084] Optionally, the size information may include the size information of a single pixel. Alternatively, it may include the size information of various parts of the electrode, such as the size information of the film region, the size information of AT11, and the size information of the tab. Or, the size information may include the length and width information of the electrode.

[0085] Optionally, based on the comparison between on-site electrode imaging and standard grayscale card imaging, and with the principle that the grayscale values ​​should be as close as possible to the actual object, the standard parts can be defined as follows: the tabs use X% grayscale, AT11 uses Y% grayscale, and the film area uses Z% grayscale.

[0086] For measurements to proceed correctly, the dimensions of the standard component must encompass the dimensions of the electrode. Specifically, in the length direction, the dimensions of the standard component can be greater than or equal to the dimensions of the electrode, and in the width direction, the dimensions of the standard component can be greater than or equal to the dimensions of the electrode.

[0087] In the above technical solution, the dimensions of the standard part are set to be greater than or equal to the dimensions of the electrode in both the length and width directions. That is, the measurement range of the standard part can cover the measurement range of the electrode. In this way, not only can the measurement be carried out normally, but the accuracy of the measured data is also high.

[0088] The developed standard parts can be, for example, like Figure 4 and Figure 5 As shown. Among them, Figure 4 For cathode standard parts, Figure 5 Standard anode parts. Figure 4 Cathode standard parts and Figure 5 In the anode standard, the grayscale value of the film area is 100% grayscale, and the grayscale value of the tabs is 50% grayscale. In addition, the cathode standard includes the AT11 section, which has a grayscale value of 25% grayscale and a width of 3mm. In both the cathode and anode standard, the tab width is 30mm.

[0089] The material of standard parts can include flexible materials. Since the die-cutting machine includes a large number of rollers in the die-cutting and slitting process, the above technical solution sets the material of the standard parts to include flexible materials. In this way, when the standard parts pass through the rollers in the die-cutting machine, the probability of the standard parts being affected by the rollers, such as being crushed by the rollers, is reduced to a certain extent.

[0090] Furthermore, the material of standard parts may include flexible materials that have a certain tensile strength and are easy to print with high precision.

[0091] For example, the material of the standard part may include film. Since film is relatively stable, has a sufficiently small amount of stretching, and has high printing accuracy, including film as the material of the standard part in this technical solution can improve the performance of the standard part, thereby improving the efficiency of determining the accuracy of the measurement system.

[0092] As another example, the material of the standard part may include steel strip. The thickness of the steel strip can be small enough, for example, the thickness of the steel strip can be 10 μm or 25 μm, etc.

[0093] Since steel strips are less affected by the environment, the standard parts in the above technical solution include steel strips, which greatly reduces the impact of the environment on the standard parts.

[0094] After the user has developed the standard part, in one possible embodiment, method 200 may further include: acquiring measurement data of the standard part. In this case, acquiring at least two sets of measurement values ​​of the electrode through the measurement system may include: acquiring at least two sets of measurement values ​​through the measurement system after determining that the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard part.

[0095] The above technical solution, on the one hand, firstly determines whether the accuracy of the measurement system meets the accuracy requirements before acquiring at least two sets of measurement values ​​for the electrode. Only when the accuracy of the measurement system meets the accuracy requirements is the at least two sets of measurement values ​​acquired through the measurement system obtained. In this way, the accuracy of the acquired at least two sets of measurement values ​​for the electrode is relatively high. On the other hand, the accuracy of the measurement system is determined by measuring data from standard parts. Since standard parts are almost unaffected by the environment, the influence of environmental factors on the determination of the accuracy of the measurement system is reduced.

[0096] As an example, measurement data for standard parts can be obtained using a traditional method. However, this process may require rewinding the standard part.

[0097] As another example, standard measurement data can be obtained through nesting. Specifically, the measurement data of the standard part includes multiple sets of measurement data, which include one type of measurement data. The multiple sets of measurement data include measurement data for at least one gradient. Each gradient in the measurement data includes multiple measurement data. For one type of measurement data, the standard part includes multiple regions. The multiple measurement data includes measurement data for multiple regions. The spacing between two adjacent regions in the multiple regions is less than a second preset value.

[0098] The above technical solution acquires measurement data of standard parts through a nested approach. Specifically, for the same type of measurement value, the standard part includes at least two regions, and the distance between any two adjacent regions is less than a second preset value. This means the distance between adjacent regions is sufficiently small to be considered as close regions, and the measurement data obtained from these at least two regions can be considered as measurement data from the same sample. This reduces the time required to acquire measurement data of standard parts and improves the efficiency of determining the accuracy of the measurement system.

[0099] Optionally, the second preset value can be the same as the first preset value, for example, both being one pixel.

[0100] Optionally, the second preset value may be different from the first preset value. For example, the first preset value is one pixel and the second preset value is two pixels.

[0101] For example, as shown in Table 1, multiple sets of measurement data include measurement data for 5 gradients, and each gradient includes 5 measurement data.

[0102] Table 1

[0103]

[0104]

[0105] Then, the average value of multiple measurement data for each gradient is compared with the reference value of the corresponding gradient. If the offset between the average value of multiple measurement data for each gradient and the reference value of the corresponding gradient is within a preset range, the accuracy of the measurement system is determined to meet the accuracy requirements.

[0106] It should be noted that after comparing the average of multiple measurement data for each gradient with the baseline value of the corresponding gradient, a series of other calculations can be performed to determine whether the accuracy of the measurement system meets the accuracy requirements.

[0107] The above technical solution determines that the accuracy of the measurement system meets the accuracy requirements when the offset between the average value of multiple measurement data of each gradient and the reference value of the corresponding gradient is within a preset range. That is, the accuracy analysis of the measurement system is performed by linear offset, which is not only simple to implement but also has a high accuracy.

[0108] Once the accuracy of the measurement system is confirmed to meet the accuracy requirements, the data of the electrode can be measured using the measurement system.

[0109] In the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0110] Furthermore, without conflict, the various embodiments and / or technical features described in this application can be arbitrarily combined with each other, and the resulting technical solutions should also fall within the protection scope of this application.

[0111] The data measurement method of the embodiments of this application has been described in detail above. The data measurement apparatus of the embodiments of this application will be described below. It should be understood that the data measurement apparatus of the embodiments of this application can perform the data measurement method of the embodiments of this application.

[0112] Figure 6 A schematic block diagram of a data measurement apparatus 600 according to an embodiment of this application is shown. Figure 6 As shown, the data measurement device 600 may include:

[0113] The acquisition unit 610 is used to acquire at least two sets of measurement values ​​of the electrode through the measurement system. The at least two sets of measurement values ​​include a type of measurement value. For the type of measurement value, the electrode includes at least two regions. The at least two sets of measurement values ​​include measurement values ​​of at least two regions. The distance between two adjacent regions in the at least two regions is less than or equal to a first preset value.

[0114] The determination unit 620 is used to determine the measurement variability of the measurement system based on at least two sets of measurements.

[0115] Optionally, in this embodiment of the application, the acquisition unit 610 is specifically used to: acquire at least two sets of measurement values ​​through the measurement system during one transfer of the electrode sheet.

[0116] Optionally, in this embodiment of the application, the first preset value is one pixel.

[0117] Optionally, in this embodiment of the application, the acquisition unit 610 is further configured to: acquire measurement data of the standard part; specifically, the acquisition unit 610 may be configured to: acquire at least two sets of measurement values ​​when the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard part.

[0118] Optionally, in this embodiment of the application, the measurement data of the standard part includes multiple sets of measurement data, the multiple sets of measurement data include one type of measurement data, the multiple sets of measurement data include at least one gradient of measurement data, the measurement data of each gradient in the at least one gradient of measurement data includes multiple measurement data, for one type of measurement data, the standard part includes multiple regions, the multiple measurement data includes measurement data of multiple regions, and the distance between two adjacent regions in the multiple regions is less than a second preset value.

[0119] Optionally, in this embodiment of the application, the determining unit 620 is further configured to: determine that the accuracy of the measurement system meets the accuracy requirements when the offset between the average value of multiple measurement data of each gradient and the reference value of the corresponding gradient is within a preset range.

[0120] Optionally, in the embodiments of this application, the standard component is determined based on the measurement parameters of the electrode.

[0121] Optionally, in the embodiments of this application, the standard component includes the grayscale information and size information of the electrode.

[0122] Optionally, in the embodiments of this application, the size of the standard part is greater than or equal to the size of the electrode in the length direction, and the size of the standard part is greater than or equal to the size of the electrode in the width direction.

[0123] Optionally, in the embodiments of this application, the material of the standard part includes a flexible material.

[0124] Optionally, in the embodiments of this application, the material of the standard part includes steel strip or film.

[0125] Optionally, in this embodiment of the application, the measurement system includes a charge-coupled device (CCD) and / or an encoder. The CCD is used to measure the dimension of the electrode in the width direction, and the encoder is used to measure the dimension of the electrode in the length direction.

[0126] It should be understood that the data measurement device 600 can perform the corresponding operations in method 200, which will not be described in detail here for the sake of brevity.

[0127] Figure 7 This is a schematic diagram of the hardware structure of a data measurement device 700 according to an embodiment of this application. The data measurement device 700 includes a memory 701, a processor 702, a communication interface 703, and a bus 704. The memory 701, processor 702, and communication interface 703 are interconnected via the bus 704.

[0128] The memory 701 may be a read-only memory (ROM), a static storage device, or a random access memory (RAM). The memory 701 may store a program, and when the program stored in the memory 701 is executed by the processor 702, the processor 702 and the communication interface 703 are used to execute the various steps of the data measurement method of the embodiments of this application.

[0129] The processor 702 may be a general-purpose central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), graphics processing unit (GPU), or one or more integrated circuits, for executing related programs to achieve the functions required by the units in the apparatus of this application embodiment, or to execute the data measurement method of this application embodiment.

[0130] The processor 702 can also be an integrated circuit chip with signal processing capabilities. In implementation, each step of the data measurement method in this embodiment can be accomplished through integrated logic circuits in the processor 702 or through software instructions.

[0131] The processor 702 described above can also be a general-purpose processor, a digital signal processor (DSP), an 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 can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly implemented by the hardware processor, or implemented by a combination of hardware and software modules in the processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory 701. The processor 702 reads the information in memory 701 and, in conjunction with its hardware, completes the functions required by the units included in the data measurement apparatus 700 of the embodiments of this application, or executes the data measurement method of the embodiments of this application.

[0132] The communication interface 703 uses a transceiver device, such as, but not limited to, a transceiver, to enable communication between the data measurement device 700 and other devices or communication networks.

[0133] Bus 704 may include a pathway for transmitting information between various components of the data measurement device 700 (e.g., memory 701, processor 702, communication interface 703).

[0134] It should be noted that although the data measurement device 700 described above only shows a memory, processor, and communication interface, those skilled in the art should understand that in specific implementations, the data measurement device 700 may also include other devices necessary for normal operation. Furthermore, depending on specific needs, those skilled in the art should understand that the data measurement device 700 may also include hardware devices for implementing other additional functions. Moreover, those skilled in the art should understand that the data measurement device 700 may only include the devices necessary for implementing the embodiments of this application, and may not necessarily include... Figure 7 All the devices shown.

[0135] This application also provides a computer-readable storage medium for storing a computer program for performing the methods described in the various embodiments of this application.

[0136] The aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0137] This application also provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions that, when executed by a computer, cause the computer to perform the above-described data measurement method.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for data measurement, characterized in that, The method includes: During a continuous transfer of the electrode sheet, at least two sets of measurement values ​​are acquired by a measurement system. The at least two sets of measurement values ​​include one type of measurement value. The electrode sheet includes at least two regions. The at least two sets of measurement values ​​include the measurement values ​​of the at least two regions. The at least two sets of measurement values ​​correspond one-to-one with the at least two regions. The distance between two adjacent regions in the at least two regions is less than or equal to a first preset value. The electrode sheet includes a film region, an insulating coating, and tabs. The measurement values ​​include at least one of the following: the width of the film region, the width of the tabs, the width of the insulating coating, and the distance between two tabs. The first preset value is one pixel, such that the at least two sets of measurement values ​​are considered to be repeated measurement values ​​of the same sample. The measurement variability of the measurement system is determined based on the at least two sets of measurements. The measurement system includes a charge-coupled device (CCD) and an encoder. The CCCD is used to measure at least one of the width of the film region, the width of the tab, and the width of the insulating coating. The encoder is used to measure the spacing between the tabs.

2. The method according to claim 1, characterized in that, The method further includes: Obtain measurement data for standard parts; The acquisition of at least two sets of measurement values ​​of the electrode through the measurement system includes: If the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard part, the at least two sets of measurement values ​​are obtained through the measurement system.

3. The method according to claim 2, characterized in that, The measurement data of the standard component includes multiple sets of measurement data, which include one type of measurement data. The multiple sets of measurement data include measurement data of at least one gradient. Each gradient in the measurement data of the at least one gradient includes multiple measurement data. For one type of measurement data, the standard component includes multiple regions. The multiple measurement data includes measurement data of the multiple regions. The distance between two adjacent regions in the multiple regions is less than a second preset value.

4. The method according to claim 3, characterized in that, The method further includes: If the offset between the average value of the plurality of measurement data for each gradient and the reference value of the corresponding gradient is within a preset range, the accuracy of the measurement system is determined to meet the accuracy requirements.

5. The method according to any one of claims 2 to 4, characterized in that, The standard component is determined based on the measurement parameters of the electrode.

6. The method according to any one of claims 2 to 4, characterized in that, The standard component includes the grayscale information and size information of the electrode.

7. The method according to any one of claims 2 to 4, characterized in that, In the length direction, the size of the standard part is greater than or equal to the size of the electrode, and in the width direction, the size of the standard part is greater than or equal to the size of the electrode.

8. The method according to any one of claims 2 to 4, characterized in that, The standard parts are made of flexible materials.

9. The method according to claim 8, characterized in that, The materials of the standard parts include steel strips or film sheets.

10. A data measurement device, characterized in that, include: An acquisition unit is configured to acquire at least two sets of measurement values ​​of an electrode sheet via a measurement system during a single continuous transfer of the electrode sheet. The at least two sets of measurement values ​​include one type of measurement value. The electrode sheet includes at least two regions, and the at least two sets of measurement values ​​include the measurement values ​​of the at least two regions. The at least two sets of measurement values ​​correspond one-to-one with the at least two regions. The distance between two adjacent regions in the at least two regions is less than or equal to a first preset value. The electrode sheet includes a film region, an insulating coating, and tabs. The measurement values ​​include at least one of the following: the width of the film region, the width of the tabs, the width of the insulating coating, and the distance between two tabs. The first preset value is one pixel, such that the at least two sets of measurement values ​​are considered repeated measurement values ​​of the same sample. A determining unit is configured to determine the measurement variability of the measurement system based on the at least two sets of measurement values; The measurement system includes a charge-coupled device (CCD) and an encoder. The CCCD is used to measure at least one of the width of the film region, the width of the tab, and the width of the insulating coating. The encoder is used to measure the spacing between the tabs.

11. The apparatus according to claim 10, characterized in that, The acquisition unit is also used for: Obtain measurement data for standard parts; The acquisition unit is specifically used for: If the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard part, the at least two sets of measurement values ​​are obtained through the measurement system.

12. The apparatus according to claim 11, characterized in that, The measurement data of the standard component includes multiple sets of measurement data, which include one type of measurement data. The multiple sets of measurement data include measurement data of at least one gradient. Each gradient in the measurement data of the at least one gradient includes multiple measurement data. For one type of measurement data, the standard component includes multiple regions. The multiple measurement data includes measurement data of the multiple regions. The distance between two adjacent regions in the multiple regions is less than a second preset value.

13. The apparatus according to claim 12, characterized in that, The determining unit is further configured to: If the offset between the average value of the plurality of measurement data for each gradient and the reference value of the corresponding gradient is within a preset range, the accuracy of the measurement system is determined to meet the accuracy requirements.

14. The apparatus according to any one of claims 11 to 13, characterized in that, The standard component is determined based on the measurement parameters of the electrode.

15. The apparatus according to any one of claims 11 to 13, characterized in that, The standard component includes the grayscale information and size information of the electrode.

16. The apparatus according to any one of claims 11 to 13, characterized in that, In the length direction, the size of the standard part is greater than or equal to the size of the electrode, and in the width direction, the size of the standard part is greater than or equal to the size of the electrode.

17. The apparatus according to any one of claims 11 to 13, characterized in that, The standard parts are made of flexible materials.

18. The apparatus according to claim 17, characterized in that, The materials of the standard parts include steel strips or film sheets.

19. A data measurement device, characterized in that, include: Memory, used to store programs; A processor for executing a program stored in the memory, wherein when the program stored in the memory is executed, the processor is configured to perform a data measurement method according to any one of claims 1 to 9.

20. A computer-readable storage medium, characterized in that, Used to store a computer program that causes a computer to perform a method for data measurement as described in any one of claims 1 to 9.

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