Data measurement method and device and computer readable storage medium

Abstract

The embodiment of the invention provides a data measurement method and device and a computer readable storage medium, which can realize evaluation of measurement volatility of a measurement system at relatively low production cost, thereby improving battery performance. The method comprises the steps that at least two sets of measurement values of a pole piece are obtained through a measurement system, the at least two sets of measurement values comprise one type of measurement values, the pole piece comprises at least two areas, and the at least two sets of measurement values comprise measurement values of the at least two areas; the distance between two adjacent areas in the at least two areas is smaller than or equal to a first preset value; and determining the measurement volatility of the measurement system according to the at least two groups of measurement values.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a data measurement method, device and computer-readable storage medium. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. In this case, electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] The production process of batteries is relatively complex and includes multiple processes, among which the die-cutting and slitting process is an important part that cannot be ignored and has a crucial impact on battery performance. Summary of the invention

[0004] The embodiments of the present application provide a data measurement method, device, and computer-readable storage medium, which can evaluate the measurement volatility of a measurement system at a relatively low production cost, thereby improving battery performance.

[0005] In a first aspect, a method for data measurement is provided, the method comprising: obtaining at least two groups of measurement values ​​of a pole piece through a measurement system, the at least two groups of measurement values ​​comprising one type of measurement values, the pole piece comprising at least two regions, the at least two groups of measurement values ​​comprising measurement values ​​of the at least two regions, and a spacing between two adjacent regions of the at least two regions being less than or equal to a first preset value; determining the measurement volatility of the measurement system based on the at least two groups of measurement values.

[0006] In the embodiment of the present application, when it is necessary to determine the volatility of the measurement system, for the same type of measurement value, the pole piece includes at least two areas, and the spacing between two adjacent areas in the at least two areas is less than the first preset value, that is, the spacing between the two adjacent areas is small enough, so that the at least two areas can be considered to be close areas, and the measurement values ​​measured on the at least two areas can be considered to be the measurement values ​​of the same sample. In this way, the MSA evaluation can be completed during the normal production process of the pole piece, reducing the waste of production materials such as pole pieces, reducing the time consumption of MSA evaluation, and greatly reducing the production cost of the pole piece.

[0007] In some possible implementations, obtaining at least two sets of measurement values ​​of the pole piece through a measurement system includes: obtaining the at least two sets of measurement values ​​through the measurement system during one conveyance process of the pole piece.

[0008] The at least two sets of measurement values ​​are obtained during one transmission of the pole piece, so that the pole piece does not need to be rewound, and if the pole piece is rewound, the speed of the pole piece needs to be relatively slow. Therefore, the technical solution does not need to slow down the pole piece and does not delay the production of the pole piece, thereby meeting the timeliness requirement.

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

[0010] Since CCD usually collects data in units of pixels, the above technical solution sets the first preset value to one pixel, that is, one pixel is spaced between two adjacent regions. In this way, the distance between the two adjacent regions can be minimized, and the consistency of the pole pieces of the at least two regions is high enough, so that the difference between the at least two sets of measurement values ​​obtained can be minimized.

[0011] In some possible implementations, the method further includes: obtaining measurement data of a standard part, and obtaining at least two sets of measurement values ​​of the pole piece through a measurement system, including: obtaining the at least two sets of measurement values ​​through the measurement system when it is determined that the accuracy of the measurement system meets the accuracy requirements based on the measurement data of the standard part.

[0012] In the above technical solution, on the one hand, before obtaining at least two sets of measurement values ​​of the pole piece, it is first determined whether the accuracy of the measurement system meets the accuracy requirements, and at least two sets of measurement values ​​are obtained through the measurement system when the accuracy of the measurement system meets the accuracy requirements. In this way, the accuracy of the at least two sets of measurement values ​​of the pole piece obtained is high. On the other hand, whether the accuracy of the measurement system meets the requirements is determined by the measurement data of the standard parts. Since the standard parts are almost not affected by the environment, the influence of environmental factors on them in the process of determining the accuracy of the measurement system is reduced.

[0013] In some possible implementations, the measurement data of the standard part includes multiple groups of measurement data, the multiple groups of measurement data include one type of measurement data, the multiple groups of measurement data include measurement data of at least one gradient, the measurement data of each gradient in the at least one gradient measurement data includes multiple measurement data, and for one type of measurement data, the standard part includes multiple areas, the multiple measurement data include measurement data of the multiple areas, and the spacing between two adjacent areas of the multiple areas is less than a second preset value.

[0014] The above technical solution obtains the measurement data of the standard part in a nested manner, that is, for the same type of measurement value, the standard part includes at least two areas, and the spacing between two adjacent areas in the at least two areas is less than the second preset value, that is, the spacing between the two adjacent areas is small enough, so that the at least two areas can be considered as close areas, and the measurement data obtained on the at least two areas can be considered as the measurement data of the same sample. In this way, the time consumption of obtaining the measurement data of the standard part is reduced, and the efficiency of determining the accuracy of the measurement system is improved.

[0015] In some possible implementations, the method further includes: determining that the accuracy of the measurement system meets the accuracy requirement when an offset between an average value of the plurality of measurement data of each gradient and a 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 requirement when the offset between the average value of multiple measurement data of each gradient and the baseline value of the corresponding gradient is within a preset range. That is, the accuracy analysis of the measurement system is performed by means of linear offset, which is not only simple to implement but also has a high accuracy rate.

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

[0018] The above technical scheme determines the standard part based on the measurement parameters of the pole piece, so that the determined standard part and the pole piece have a high consistency. 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 groups of measurement values ​​of the pole piece measured by the measurement system is high.

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

[0020] In the above technical solution, the standard part is set to include the grayscale information and size information of the pole piece, so that the consistency between the determined standard part and the pole piece is relatively 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 groups of measurement values ​​of the pole piece obtained by the measurement system is relatively high.

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

[0022] In the above technical solution, the size of the standard part is set to be greater than or equal to the size of the pole piece in both the length and width directions, that is, the measurement range of the standard part can cover the measurement range of the pole piece. In this way, during the measurement process, not only can the normal measurement be guaranteed, but also the accuracy of the measured data is high.

[0023] In some possible implementations, the material of the standard part 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 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.

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

[0026] Since the steel strip is less affected by the environment, in the above technical solution, the material of the standard part includes the steel strip, which greatly reduces the impact of the environment on the standard part. In addition, the film is relatively stable, the expansion amount is small enough, and the printing accuracy is high. Therefore, in the above technical solution, the material of the standard part includes the film, which can improve the performance of the standard part, 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 charge coupled device (CCD) is used to measure the dimension of the pole piece in the width direction, and the encoder is used to measure the dimension of the pole piece in the length direction.

[0028] In a second aspect, a data measurement device is provided, comprising: an acquisition unit, used to acquire at least two groups of measurement values ​​of a pole piece through a measurement system, the at least two groups of measurement values ​​including one type of measurement values, the pole piece including at least two regions, the at least two groups of measurement values ​​including measurement values ​​of the at least two regions, and a spacing between two adjacent regions of the at least two regions is less than or equal to a first preset value; a determination unit, used to determine the measurement volatility of the measurement system based on the at least two groups of measurement values.

[0029] In some possible implementations, the acquisition unit is specifically configured to: acquire the at least two groups of measurement values ​​through the measurement system during one transfer process of the pole piece.

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

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

[0032] In some possible implementations, the measurement data of the standard part includes multiple groups of measurement data, the multiple groups of measurement data include one type of measurement data, the multiple groups of measurement data include measurement data of at least one gradient, the measurement data of each gradient in the at least one gradient measurement data includes multiple measurement data, and for one type of measurement data, the standard part includes multiple areas, the multiple measurement data include measurement data of the multiple areas, and the spacing between two adjacent areas of the multiple areas is less than a second preset value.

[0033] In some possible implementations, the determination unit is further used to determine that the accuracy of the measurement system meets the accuracy requirement when an offset between an average value of the multiple measurement data of each gradient and a reference value of the corresponding gradient is within a preset range.

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

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

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

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

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

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

[0040] In a third aspect, a data measurement device is provided, comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call the computer program to execute the method in the first aspect or its various implementations.

[0041] In a fourth aspect, a computer-readable storage medium is provided for storing a computer program, wherein the computer program enables a computer to execute the method in the above-mentioned first aspect or its various implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0043] In the drawings, the drawings are not drawn to scale.

[0044] Figure 1 It is a schematic diagram of the current CCD and encoder data collection.

[0045] Figure 2 It is a schematic flow chart of a data measurement method according to an embodiment of the present application.

[0046] Figure 3 It is a schematic diagram of a CCD and encoder collecting data in an embodiment of the present application.

[0047] Figure 4 It is a schematic diagram of a cathode standard component according to an embodiment of the present application.

[0048] Figure 5 It is a schematic diagram of an anode standard component according to an embodiment of the present application.

[0049] Figure 6 It is a schematic block diagram of a data measurement device according to an embodiment of the present application.

[0050] Figure 7 It is a schematic block diagram of a data measurement device according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0052] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0053] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

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

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

[0056] Optionally, the battery can be a power battery. In terms of the type of battery, the battery can be a lithium-ion battery, a lithium metal battery, a lead-acid battery, a nickel-cathode battery, a nickel-hydrogen battery, a lithium-sulfur battery, a lithium-air battery or a sodium-ion battery, etc., which is not specifically limited in the embodiments of the present application. In terms of battery size, the battery in the embodiments of the present application can be a battery cell / battery monomer, or a battery module or a battery pack, which is not specifically limited in the embodiments of the present application.

[0057] The production process of batteries is relatively complex and includes multiple processes, such as stirring, coating, rolling, die-cutting and slitting, winding, injection and formation. Among them, the die-cutting and slitting process is an important part that cannot be ignored, and its impact on battery performance is crucial. The die-cutting process uses a die-cutting machine to form the tabs of the battery cells, and the slitting process is to continuously cut the wider roll of pole pieces into several pole pieces of the required width.

[0058] At present, in the die-cutting and slitting process, a line scanning charge coupled device (CCD) is usually used to measure the relevant dimensions in the width direction of the pole piece, and an encoder is used to measure the relevant dimensions in the length direction of the pole piece. Figure 1 A schematic diagram of the pole ear is shown in FIG. The pole ear includes multiple parts, from bottom to top, respectively, the film area, the insulating layer (ie, AT11) and the pole ear. CCD usually uses a line scan camera. When the pole piece moves past the line scan camera, the line scan camera collects a new pixel line, such as Figure 1 As shown in the b detection box in the figure, the software on the visual processor or image acquisition card can store the data collected each time, and then reconstruct the stored data into the final 2D image. The encoder collects data in a similar way to CCD, collecting only one pixel line at a time, such as Figure 1 As shown in the e detection box in , a data is obtained, such as Figure 1 The spacing h between the pole ears.

[0059] In some scenarios, it is necessary to use the measurement system analysis (MSA) method to evaluate the measurement system (i.e., CCD and / or encoder), for example, to evaluate the accuracy of the measurement. MSA requires that the measurement object is repeatable and testable. For example, the spacing h between the pole ears needs to be measured three times. However, in the die-cutting and slitting process, the pole pieces are cut into multiple parts, and many pole pieces do not have the conditions for repeated testing. Alternatively, some pole pieces need to be rewound for repeated testing. However, in the process of rewinding the pole pieces, the rewinding speed is slow, for example, as low as 5 meters / minute (m / min), which results in a longer time-consuming and lower efficiency for MSA evaluation.

[0060] Based on this, the embodiment of the present application proposes a method for data measurement, which characterizes the measurement volatility of the measurement system by obtaining at least two groups of measurement values ​​of the pole piece, wherein the at least two groups of measurement values ​​include one type of measurement value, and for one type of measurement value, the pole piece includes at least two regions, and the at least two groups of measurement values ​​include the measurement values ​​of at least two regions, and the spacing between two adjacent regions in at least two regions is less than or equal to a first preset value. Through this method, when it is necessary to determine the volatility of the measurement system, for the same type of measurement value, the pole piece includes at least two regions, and the spacing between two adjacent regions in the at least two regions is less than the first preset value, that is, the spacing between the two adjacent regions is small enough, so that the at least two regions can be considered to be close regions, and the measurement values ​​measured on the at least two regions can be considered to be the measurement values ​​of the same sample. In this way, the MSA evaluation can be completed in the normal production process of the pole piece, reducing the waste of production materials such as pole pieces, reducing the time consumption of MSA evaluation, and greatly reducing the production cost of the pole piece.

[0061] Figure 2 FIG. 2 is a schematic flow chart of a method 200 for measuring data according to an embodiment of the present application. Figure 2 As shown, method 200 may include at least part of the following contents.

[0062] S210: Obtain at least two groups of measurement values ​​of the pole piece through the measurement system, the at least two groups of measurement values ​​include one type of measurement values, the pole piece includes at least two regions, the at least two groups of measurement values ​​include measurement values ​​of the at least two regions, and the spacing between two adjacent regions in the at least two regions is less than or equal to a first preset value.

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

[0064] It should be noted that, in the embodiments of the present application, the measurement volatility of the measurement system may also be referred to as the accuracy of the measurement system.

[0065] In the embodiment of the present application, when it is necessary to determine the volatility of the measurement system, for the same type of measurement value, the pole piece includes at least two areas, and the spacing between two adjacent areas in the at least two areas is less than the first preset value, that is, the spacing between the two adjacent areas is small enough, so that the at least two areas can be considered to be close areas, and the measurement values ​​measured on the at least two areas can be considered to be the measurement values ​​of the same sample. In this way, the MSA evaluation can be completed during the normal production process of the pole piece, reducing the waste of production materials such as pole pieces, reducing the time consumption of MSA evaluation, and greatly reducing the production cost of the pole piece.

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

[0067] like Figure 3 As shown, the pole piece includes a film area, AT11 and a pole lug. Among them, the grayscale values ​​of different parts can be different. For example, the grayscale value of the film area can be 100% grayscale, the grayscale value of AT11 can be 50% grayscale, and the grayscale value of the pole lug can be 25% grayscale. The measurement value can include multiple types, for example, the width of the film area, the width of the pole lug or the width of AT11, and these types of measurement values ​​can be obtained by CCD measurement. Alternatively, the measurement value can include, for example, the spacing between two pole lugs, and the spacing between the pole lugs can be measured by an encoder.

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

[0069] Reference again Figure 3 , for one type of measurement value, the pole piece may include at least two regions. For example, if the measurement value includes the width of the membrane area, then in the length direction of the pole piece (i.e., the X direction), the pole piece includes three regions, i.e., region a, region b, and region c, and at least two groups of measurement values ​​include the measurement value of region a, the measurement value of region b, and the measurement value of region c; if the measurement value includes the spacing between the pole lugs, then in the length direction of the pole piece, for each pole lug, the pole piece includes three regions, i.e., region d, region e, and region f, and at least two groups of measurement values ​​include the spacing between the regions d of the two pole lugs, the spacing between the regions e of the two pole lugs, and the spacing between the regions f of the two pole lugs.

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

[0071] Since CCD usually collects data in units of pixels, the above technical solution sets the first preset value to one pixel, that is, one pixel is spaced between two adjacent regions. In this way, the distance between the two adjacent regions can be minimized, and the consistency of the pole pieces of the at least two regions is high enough, so that the difference between the at least two sets of measurement values ​​obtained can be minimized.

[0072] In some embodiments, obtaining at least two sets of measurement values ​​of the pole piece by the measurement system may include: obtaining the at least two sets of measurement values ​​by the measurement system during one conveyance of the pole piece.

[0073] The at least two sets of measurement values ​​are obtained during one transmission of the pole piece, so that the pole piece does not need to be rewound, and if the pole piece is rewound, the speed of the pole piece needs to be relatively slow. Therefore, the technical solution does not need to slow down the pole piece and does not delay the production of the pole piece, thereby meeting the timeliness requirement.

[0074] After obtaining at least two sets of measurement values ​​of the pole piece, a series of operations may be performed on the at least two sets of measurement values ​​to determine the measurement fluctuation of the measurement system.

[0075] As mentioned above, the CCD can be used to measure the width dimension of the pole piece, and the encoder can be used to measure the length dimension of the pole piece. During the measurement process, the encoder sends a pulse signal to the CCD, and the CCD can collect data of a pixel line.

[0076] The installation and fixation of the encoder may affect the accuracy of the measurement, so the encoder needs to be analyzed for accuracy. In addition, CCD is a non-standard device, and usually an accuracy analysis method needs to be established for it.

[0077] Therefore, before obtaining at least two sets of measurement values ​​of the pole piece, the accuracy of the measurement system needs to be tested. When it is determined that the accuracy of the measurement system meets the accuracy requirements, at least two sets of test values ​​are obtained through the measurement system. In this way, the accuracy of the at least two sets of measurement values ​​of the pole piece obtained is high.

[0078] Generally, the pole piece cannot be stored for a long time. Therefore, in some implementations, the accuracy of the measurement system can be tested based on the standard part. Specifically, the standard part can be connected to the measurement system to test the accuracy of the measurement system. Exemplarily, the standard part can be connected to the measurement system by being attached to the pole piece.

[0079] Before this, the user can develop a standard part. It should be understood that in the embodiment of the present application, the standard part can also be called a profiling Master or other names.

[0080] In some embodiments, the user can develop standard parts according to the production characteristics of the pole piece. For example, the standard parts can be developed according to the measurement parameters of the pole piece. For example, if the measurement parameters include the width of the film area, the standard parts can be developed according to the width of the film area. For another example, if the measurement parameters include the width of the glue coating, the standard parts can be developed according to the width of the glue coating.

[0081] The above technical scheme determines the standard part based on the measurement parameters of the pole piece, so that the determined standard part and the pole piece have a high consistency. 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 groups of measurement values ​​of the pole piece measured by the measurement system is high.

[0082] Furthermore, considering that the CCD measures the size of the pole piece based on the grayscale difference of the image, that is, the different parts of the pole piece are determined based on the grayscale. Then the corresponding measurement value is determined by multiplying the number of pixels between the two edges by the size of a single pixel. Therefore, the standard part can include the grayscale information and size information of the pole piece.

[0083] This technical solution sets the standard part to include the grayscale information and size information of the pole piece, so that the consistency between the determined standard part and the pole piece 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 groups of measurement values ​​of the pole piece measured by the measurement system is high.

[0084] Optionally, the size information may include the size information of a single pixel. Alternatively, the size information may include the size information of each part of the pole piece, for example, the size information of the membrane area, the size information of the AT11, and the size information of the pole lug. Alternatively, the size information may include the length information and the width information of the pole piece.

[0085] Optionally, based on the comparison between the on-site electrode imaging and the standard grayscale card imaging, the grayscale value can be as close to and equivalent to the actual object as possible, and the standard parts can be defined as X% grayscale for the electrode ears, Y% grayscale for AT11, and Z% grayscale for the membrane area.

[0086] In order to measure properly, the size of the standard part must cover the size of the pole piece. Specifically, in the length direction, the size of the standard part can be greater than or equal to the size of the pole piece, and in the width direction, the size of the standard part can be greater than or equal to the size of the pole piece.

[0087] In the above technical solution, the size of the standard part is set to be greater than or equal to the size of the pole piece in both the length and width directions, that is, the measurement range of the standard part can cover the measurement range of the pole piece. In this way, during the measurement process, not only can the normal measurement be guaranteed, but also the accuracy of the measured data is high.

[0088] The developed standard parts can be used, for example, Figure 4 and Figure 5 As shown. Among them, Figure 4 It is the cathode standard part. Figure 5 Anode standard. Figure 4 Cathode standard parts and Figure 5 In the anode standard part, the grayscale value of the membrane area is 100% grayscale and the grayscale value of the tab is 50% grayscale. In addition, the cathode standard part also includes the AT11 part, the grayscale value of AT11 is 25% grayscale, and the width of AT11 is 3mm. In both the cathode standard part and the anode standard part, the width of the tab is 30mm.

[0089] The material of the standard part may include a flexible material. 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, so that 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.

[0090] Furthermore, the material of the standard part may include a flexible material that has a certain tensile strength and is easy to print with high precision.

[0091] Exemplarily, the material of the standard part may include film. Since film is relatively stable, has a small enough expansion and contraction amount, and has a high printing accuracy, the material of the standard part in the technical solution includes film, which 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 a steel strip, and the thickness of the steel strip may be small enough, for example, the thickness of the steel strip may be 10 μm or 25 μm.

[0093] Since the steel strip is less affected by the environment, in the above technical solution, the material of the standard part includes the steel strip, which greatly reduces the impact of the environment on the standard part.

[0094] After the user has developed the standard part, in a possible embodiment, the method 200 may further include: obtaining measurement data of the standard part. At this time, obtaining at least two sets of measurement values ​​of the pole piece through the measurement system may include: obtaining at least two sets of measurement values ​​through the measurement system when it is determined that the accuracy of the measurement system meets the accuracy requirement according to the measurement data of the standard part.

[0095] In the above technical solution, on the one hand, before obtaining at least two sets of measurement values ​​of the pole piece, it is first determined whether the accuracy of the measurement system meets the accuracy requirements, and at least two sets of measurement values ​​are obtained through the measurement system when the accuracy of the measurement system meets the accuracy requirements. In this way, the accuracy of the at least two sets of measurement values ​​of the pole piece obtained is high. On the other hand, whether the accuracy of the measurement system meets the requirements is determined by the measurement data of the standard parts. Since the standard parts are almost not affected by the environment, the influence of environmental factors on them in the process of determining the accuracy of the measurement system is reduced.

[0096] As an example, the measurement data of the standard part may be obtained through a traditional solution, that is, in the process of obtaining the measurement data of the standard part, the standard part may need to be rewound.

[0097] As another example, standard measurement data may be obtained in a nested manner. Specifically, the measurement data of the standard component includes multiple groups of measurement data, the multiple groups of measurement data include one type of measurement data, the multiple groups of measurement data include at least one gradient measurement data, each gradient measurement data in the at least one gradient measurement data includes multiple measurement data, for one type of measurement data, the standard component includes multiple regions, the multiple measurement data include measurement data of multiple regions, and the spacing between two adjacent regions in the multiple regions is less than a second preset value.

[0098] The above technical solution obtains the measurement data of the standard part in a nested manner, that is, for the same type of measurement value, the standard part includes at least two areas, and the spacing between two adjacent areas in the at least two areas is less than the second preset value, that is, the spacing between the two adjacent areas is small enough, so that the at least two areas can be considered as close areas, and the measurement data obtained on the at least two areas can be considered as the measurement data of the same sample. In this way, the time consumption of obtaining the measurement data of the standard part is reduced, and the efficiency of determining the accuracy of the measurement system is improved.

[0099] Optionally, the second preset value may be the same as the first preset value, for example, both are 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, the multiple groups of measurement data include measurement data of 5 gradients, and each gradient measurement data includes 5 measurement data.

[0102] Table 1

[0103]

[0104]

[0105] Afterwards, the average value of multiple measurement data of each gradient is compared with the reference value of the corresponding gradient. 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, it is determined that the accuracy of the measurement system meets the accuracy requirements.

[0106] It should be noted that after comparing the average value of the multiple measurement data of each gradient with the reference value of the corresponding gradient, a series of other operations may be performed to determine whether the accuracy of the measurement system meets the accuracy requirement.

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

[0108] After confirming that the accuracy of the measurement system meets the accuracy requirements, the data of the pole piece can be measured through the measurement system.

[0109] In the embodiments of the present application, the sequence numbers of the above processes do not mean the order of execution. The order of execution 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 the present application.

[0110] Furthermore, under the premise of no conflict, the various embodiments and / or the technical features in the various embodiments described in the present application may be arbitrarily combined with each other, and the technical solutions obtained after the combination shall also fall within the protection scope of the present application.

[0111] The above describes in detail the data measurement method of the embodiment of the present application, and the following describes the data measurement device of the embodiment of the present application. It should be understood that the data measurement device of the embodiment of the present application can execute the data measurement method of the embodiment of the present application.

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

[0113] The acquisition unit 610 is used to acquire at least two groups of measurement values ​​of the pole piece through the measurement system, the at least two groups of measurement values ​​include one type of measurement values, for one type of measurement values, the pole piece includes at least two areas, the at least two groups of measurement values ​​include the measurement values ​​of the at least two areas, and the spacing between two adjacent areas of the at least two areas is less than or equal to a first preset value.

[0114] The determination unit 620 is configured to determine the measurement volatility of the measurement system according to at least two groups of measurement values.

[0115] Optionally, in an embodiment of the present application, the acquisition unit 610 is specifically used to: acquire at least two sets of measurement values ​​through a measurement system during one transmission process of the pole piece.

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

[0117] Optionally, in an embodiment of the present application, the acquisition unit 610 is further used to: acquire measurement data of a standard part; the acquisition unit 610 can specifically be used to: acquire at least two sets of measurement values ​​when it is determined based on the measurement data of the standard part that the accuracy of the measurement system meets the accuracy requirements.

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

[0119] Optionally, in the embodiment of the present application, the determination unit 620 is further used to determine that the accuracy of the measurement system meets the accuracy requirement 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 an embodiment of the present application, the standard part is determined based on the measurement parameters of the pole piece.

[0121] Optionally, in an embodiment of the present application, the standard part includes grayscale information and size information of the pole piece.

[0122] Optionally, in an embodiment of the present application, in the length direction, the size of the standard part is greater than or equal to the size of the pole piece, and in the width direction, the size of the standard part is greater than or equal to the size of the pole piece.

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

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

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

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

[0127] Figure 7 700 is a hardware structure diagram of a data measurement device 700 of an embodiment of the present application. The data measurement device 700 includes a memory 701, a processor 702, a communication interface 703 and a bus 704. The memory 701, the processor 702 and the communication interface 703 are connected to each other through the bus 704.

[0128] The memory 701 may be a read-only memory (ROM), a static storage device, and a random access memory (RAM). The memory 701 may store a program. 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 perform each step of the data measurement method of the embodiment of the present application.

[0129] The processor 702 can adopt a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), a graphics processing unit (GPU) or one or more integrated circuits to execute relevant programs to implement the functions required to be performed by the units in the device of the embodiment of the present application, or to execute the data measurement method of the embodiment of the present application.

[0130] The processor 702 may also be an integrated circuit chip with signal processing capability. In the implementation process, each step of the data measurement method of the embodiment of the present application may be completed by an integrated logic circuit of hardware in the processor 702 or by instructions in the form of software.

[0131] The processor 702 may also be a general-purpose processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. The methods, steps, and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 701, and the processor 702 reads the information in the memory 701, and combines its hardware to complete the functions required to be performed by the units included in the data measurement device 700 of the embodiment of the present application, or executes the data measurement method of the embodiment of the present application.

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

[0133] The bus 704 may include a path for transmitting information between various components of the apparatus for data measurement 700 (eg, the memory 701 , the processor 702 , and the communication interface 703 ).

[0134] It should be noted that although the above-mentioned data measurement device 700 only shows a memory, a processor, and a communication interface, in the specific implementation process, those skilled in the art should understand that the data measurement device 700 may also include other devices necessary for normal operation. At the same time, according to 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. In addition, those skilled in the art should understand that the data measurement device 700 may also only include the devices necessary to implement the embodiments of the present application, and does not necessarily include Figure 7 All devices shown in .

[0135] The embodiments of the present application also provide a computer-readable storage medium for storing a computer program, wherein the computer program is used to execute the methods of the various embodiments of the present application described above.

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

[0137] An embodiment of the present application further provides a computer program product, which includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer executes the above-mentioned data measurement method.

[0138] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements 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 the present application.

Claims

1. A method for data measurement, characterized in that: The method comprises: Acquire at least two groups of measurement values ​​of the pole piece by a measurement system, the at least two groups of measurement values ​​include one type of measurement value, the pole piece includes at least two regions, the at least two groups of measurement values ​​include measurement values ​​of the at least two regions, and a spacing between two adjacent regions in the at least two regions is less than or equal to a first preset value; Based on the at least two sets of measurement values, a measurement volatility of the measurement system is determined.

2. The method according to claim 1, characterized in that The step of obtaining at least two sets of measurement values ​​of the pole piece by the measurement system comprises: During one conveying process of the pole piece, the at least two groups of measurement values ​​are acquired by the measurement system.

3. The method according to claim 1 or 2, characterized in that: The first preset value is one pixel.

4. The method according to any one of claims 1 to 3, characterized in that The method further comprises: Obtain measurement data of standard parts; The step of obtaining at least two sets of measurement values ​​of the pole piece by the measurement system comprises: When it is determined according to the measurement data of the standard component that the accuracy of the measurement system meets the accuracy requirement, the at least two groups of measurement values ​​are acquired through the measurement system.

5. The method according to claim 4, characterized in that The measurement data of the standard part includes multiple groups of measurement data, the multiple groups of measurement data include one type of measurement data, the multiple groups of measurement data include measurement data of at least one gradient, the measurement data of each gradient in the at least one gradient measurement data includes multiple measurement data, and for one type of measurement data, the standard part includes multiple areas, the multiple measurement data include measurement data of the multiple areas, and the spacing between two adjacent areas among the multiple areas is less than a second preset value.

6. The method according to claim 5, characterized in that The method further comprises: When the offset between the average value of the plurality of measurement data of each gradient and the reference value of the corresponding gradient is within a preset range, it is determined that the accuracy of the measurement system meets the accuracy requirement.

7. The method according to any one of claims 4 to 6, characterized in that The standard part is determined based on the measured parameters of the pole piece.

8. The method according to any one of claims 4 to 7, characterized in that The standard part includes grayscale information and size information of the pole piece.

9. The method according to any one of claims 4 to 8, characterized in that In the length direction, the size of the standard part is greater than or equal to the size of the pole piece, and in the width direction, the size of the standard part is greater than or equal to the size of the pole piece.

10. The method according to any one of claims 4 to 9, characterized in that The material of the standard part includes a flexible material.

11. The method according to claim 10, characterized in that The material of the standard part includes steel strip or film.

12. The method according to any one of claims 1 to 11, characterized in that The measuring system comprises a charge coupled device (CCD) and / or an encoder. The charge coupled device (CCD) is used to measure the dimension of the pole piece in the width direction, and the encoder is used to measure the dimension of the pole piece in the length direction.

13. A data measurement device, characterized in that: include: an acquisition unit, used for acquiring at least two groups of measurement values ​​of the pole piece through the measurement system, the at least two groups of measurement values ​​comprising one type of measurement value, the pole piece comprising at least two regions, the at least two groups of measurement values ​​comprising measurement values ​​of the at least two regions, and a spacing between two adjacent regions in the at least two regions being less than or equal to a first preset value; A determination unit is used to determine the measurement volatility of the measurement system according to the at least two groups of measurement values.

14. The device according to claim 13, characterized in that The acquisition unit is specifically used for: During one conveying process of the pole piece, the at least two groups of measurement values ​​are acquired by the measurement system.

15. The device according to claim 13 or 14, characterized in that The first preset value is one pixel.

16. The device according to any one of claims 12 to 15, characterized in that The acquisition unit is also used for: Obtain measurement data of standard parts; The acquisition unit is specifically used for: When it is determined according to the measurement data of the standard component that the accuracy of the measurement system meets the accuracy requirement, the at least two groups of measurement values ​​are acquired through the measurement system.

17. The device according to claim 16, characterized in that The measurement data of the standard part includes multiple groups of measurement data, the multiple groups of measurement data include one type of measurement data, the multiple groups of measurement data include measurement data of at least one gradient, the measurement data of each gradient in the at least one gradient measurement data includes multiple measurement data, and for one type of measurement data, the standard part includes multiple areas, the multiple measurement data include measurement data of the multiple areas, and the spacing between two adjacent areas among the multiple areas is less than a second preset value.

18. The device according to claim 17, characterized in that The determining unit is further configured to: When the offset between the average value of the plurality of measurement data of each gradient and the reference value of the corresponding gradient is within a preset range, it is determined that the accuracy of the measurement system meets the accuracy requirement.

19. The device according to any one of claims 16 to 18, characterized in that The standard part is determined based on the measured parameters of the pole piece.

20. The device according to any one of claims 16 to 19, characterized in that The standard part includes grayscale information and size information of the pole piece.

21. The device according to any one of claims 16 to 20, characterized in that In the length direction, the size of the standard part is greater than or equal to the size of the pole piece, and in the width direction, the size of the standard part is greater than or equal to the size of the pole piece.

22. The device according to any one of claims 16 to 21, characterized in that The material of the standard part includes a flexible material.

23. The device according to claim 22, characterized in that The material of the standard part includes steel strip or film.

24. The device according to any one of claims 13 to 23, characterized in that The measuring system comprises a charge coupled device (CCD) and / or an encoder. The charge coupled device (CCD) is used to measure the dimension of the pole piece in the width direction, and the encoder is used to measure the dimension of the pole piece in the length direction.

25. A data measurement device, characterized in that: include: Memory, used to store programs; A processor is used to execute the program stored in the memory. When the program stored in the memory is executed, the processor is used to execute the data measurement method according to any one of claims 1 to 12.

26. A computer-readable storage medium, characterized in that: Used to store a computer program, wherein the computer program causes a computer to execute the data measurement method according to any one of claims 1 to 12.

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