Battery measurement equipment verification method and device, equipment, storage medium and program product

Abstract

The invention relates to a battery measurement equipment verification method and device, equipment, a storage medium and a program product. The method comprises the following steps: acquiring a target measurement value obtained by measuring a target tab spacing by a measurement device, determining a verification index value of the measurement device according to the target measurement value and a target reference value, and further verifying the measurement capability of the measurement device on a target length according to a tab spacing tolerance and the verification index value. And obtaining a first verification result of the measurement equipment. According to the method, measurement personnel do not need to measure the length of the intercepted tab and pole piece to obtain the measurement data and obtain the verification result of the measurement equipment, but the measurement capability of the measurement equipment on the tab spacing is verified through the determined tab spacing tolerance, so that the measurement capability of the measurement equipment on the target length is verified; and the accuracy of the obtained first verification result is improved.

Description

Technical Field

[0001] The present application relates to the technical field of measuring device calibration, and particularly to a method, device, equipment, storage medium and program product for calibrating a measuring device of a battery. Background Art

[0002] In the production process of tabbed electrode sheets, a tabbed electrode sheet can be cut from electrode sheet materials by means of a die-cutting machine for electrode sheets to form a tabbed electrode sheet with tabs, and a measuring device measures the target length of the tabbed electrode sheet required to produce a single battery cell. The tabbed electrode sheet with this target length is wound into a battery cell. Therefore, the accuracy of the measuring device is crucial, and it is necessary to calibrate the accuracy of the measuring device.

[0003] Currently, an operator manually intercepts the tabbed electrode sheet required to produce a single battery cell, places the intercepted tabbed electrode sheet on a measuring table, measures the length of the intercepted tabbed electrode sheet using a flexible ruler or a steel ruler, and compares the measurement data with the measured value of the measuring device to obtain the calibration result of the measuring device for the target length.

[0004] However, this method has the problem of low accuracy of the obtained calibration result. Summary of the Invention

[0005] Based on this, in view of the above technical problems, it is necessary to provide a method, device, equipment, storage medium and program product for calibrating a measuring device of a battery, which can improve the accuracy of the calibration result of the measuring device obtained.

[0006] In a first aspect, the present application provides a method for calibrating a measuring device of a battery. The method includes:

[0007] Obtaining a target measurement value measured by the measuring device for a target tab spacing;

[0008] Determining a calibration index value of the measuring device according to the target measurement value and a target reference value;

[0009] Calibrating the measurement ability of the measuring device for the target length according to the tab spacing tolerance and the calibration index value to obtain a first calibration result of the measuring device; the target length is the length of the tabbed electrode sheet used to produce a single battery cell, and the tab spacing tolerance is determined based on a preset total length tolerance corresponding to the target length and the total number of tab spacings on the tabbed electrode sheet with the target length.

[0010] In this embodiment, by obtaining the target measurement value obtained by measuring the target tab spacing with a measuring device, according to the target measurement value and the target reference value, the calibration index value of the measuring device is determined. Then, according to the tab spacing tolerance and the calibration index value, the measuring ability of the measuring device for the target length is calibrated to obtain the first calibration result of the measuring device. Since this method does not require a measurement personnel to measure the length of the intercepted tab electrode to obtain measurement data and obtain the calibration result of the measuring device, but calibrates the measuring ability of the measuring device for the tab spacing through the determined tab spacing tolerance, and then calibrates the measuring ability of the measuring device for the target length, the accuracy of the obtained first calibration result is improved.

[0011] In one embodiment, the tab spacing tolerance is determined based on the ratio of the preset total length tolerance to the square root of the total number.

[0012] In this embodiment, the tab spacing tolerance is determined based on the ratio of the preset total length tolerance to the square root of the total number, so that the determined tab spacing tolerance meets the control requirements of the actual preset total length tolerance. When the tab spacing tolerance meets the control requirements of the actual preset total length tolerance, the measuring ability of the measuring device for the target length is calibrated, and then the accuracy of the obtained first calibration result is improved.

[0013] In one embodiment, the tab spacing tolerance is equal to the ratio.

[0014] In this embodiment, the tab spacing tolerance is equal to the ratio, realizing that when the tab spacing tolerance meets the control requirements of the actual preset total length tolerance, the measuring ability of the measuring device for the target length is calibrated, and then the accuracy of the obtained first calibration result is improved.

[0015] In one embodiment, according to the tab spacing tolerance and the calibration index value, calibrating the measuring ability of the measuring device for the target length to obtain the first calibration result of the measuring device includes:

[0016] Comparing the calibration index value corresponding to the calibration method with the tab spacing tolerance of the first preset multiple to obtain a first comparison result;

[0017] According to the first comparison result, calibrate the measuring ability of the measuring device for the target length to obtain the first calibration result of the measuring device.

[0018] In this embodiment, by comparing the calibration index value corresponding to the calibration method with the tab spacing tolerance of the first preset multiple to obtain a first comparison result, and according to the first comparison result, calibrating the measuring ability of the measuring device for the target length to obtain the first calibration result of the measuring device, the accuracy of the obtained first calibration result is improved.

[0019] In one embodiment, obtaining a target measurement value obtained by a measuring device measuring a target tab spacing includes:

[0020] If the verification method is an offline verification method, then use the tab pole piece with a preset length of the tab spacing that has been measured by the measuring device as the sample tab pole piece;

[0021] Use the measurement value obtained by the measuring device measuring the tab spacing on the sample tab pole piece as the target measurement value; the preset length is less than the target length.

[0022] In this embodiment, if the verification method is an offline verification method, then use the tab pole piece with a preset length of the tab spacing that has been measured by the measuring device as the sample tab pole piece, and use the measurement value obtained by the measuring device measuring the tab spacing on the sample tab pole piece as the target measurement value. Thus, based on different verification methods, different strategies are adopted to obtain the target measurement value, making the obtained target measurement value more in line with the corresponding verification method. And, since the length of the sample tab pole piece is less than the target length, it can not only reduce the cost required to verify the measuring ability of the measuring device, but also achieve obtaining a smaller number of target measurement values, and using the smaller number of target measurement values and the corresponding target reference values, the verification index value can be obtained, improving the efficiency of obtaining the verification index value, and further improving the efficiency of obtaining the first verification result.

[0023] In one embodiment, the method further includes:

[0024] Measure the tab spacing on the sample tab pole piece on the measuring table by an image measuring instrument to obtain the target reference value corresponding to the offline verification method; one end of the sample tab pole piece is hung with a weight, and the gravity of the weight is consistent with the tension of the production machine of the tab die-cutting machine.

[0025] In this embodiment, measure the tab spacing on the sample tab pole piece on the measuring table by an image measuring instrument to obtain the target reference value corresponding to the offline verification method. Since the gravity of the weight is consistent with the tension of the production machine of the tab die-cutting machine, the measurement environment where the sample tab pole piece is located is kept consistent with the measurement environment of the production machine, so that the target reference value is more in line with the measurement environment of the production machine, and the target reference value is more accurate than the measurement data obtained by traditional manual measurement as the reference value, thus improving the accuracy of the first verification result of the measuring device obtained.

[0026] In one embodiment, according to the target measurement value and the target reference value, determining the verification index value of the measuring device includes:

[0027] Determine the measurement difference between the target reference value corresponding to the offline verification method and the target measurement value;

[0028] Determine the verification index value of the measuring device according to the measurement difference.

[0029] In this embodiment, by determining the measurement difference between the target reference value and the target measurement value corresponding to the offline calibration method, the calibration index value of the measuring device is determined according to the measurement difference. Since the target reference value is more accurate than the measurement data obtained by traditional manual measurement as the reference value, therefore, the calibration index value obtained based on the more accurate target reference value is also more accurate, thereby improving the accuracy of the first calibration result obtained based on the calibration index value.

[0030] In one embodiment, determining the calibration index value of the measuring device according to the measurement difference includes:

[0031] Taking the measurement difference as the calibration index value of the measuring device.

[0032] In this embodiment, by directly taking the measurement difference as the calibration index value of the measuring device, the acquisition of the calibration index value is made more simple and fast, thereby improving the efficiency of obtaining the first calibration result based on the calibration index value.

[0033] In one embodiment, according to the first comparison result, calibrating the measurement ability of the measuring device for the target length to obtain the first calibration result of the measuring device includes:

[0034] If the first comparison result is that the measurement difference is less than or equal to the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the tab is normal;

[0035] If the first comparison result is that the measurement difference is greater than the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the tab is abnormal.

[0036] In this embodiment, directly comparing the magnitude of the measurement difference with the ear tab spacing tolerance of the first preset multiple to obtain the first comparison result, this method is relatively fast and simple, thereby improving the efficiency of the obtained first comparison result, and thus improving the efficiency of the obtained first calibration result.

[0037] In one embodiment, obtaining the target measurement value measured by the measuring device for the target ear tab spacing includes:

[0038] If the calibration method is the online calibration method, the measuring device measures the ear tab spacings of multiple dimensions on the first standard part to obtain the first measurement values corresponding to the ear tab spacings of each dimension;

[0039] Among them, the target measurement values include the first measurement values corresponding to the tab spacings of each dimension. The first standard part is a standard part disposed between the first tabbed sheet material and the second tabbed sheet material. The first tabbed sheet material and the second tabbed sheet material are materials on the workbench of the tab die-cutting machine when the tab die-cutting machine is working. The gray level of the first standard part is consistent with that of the tabbed sheet.

[0040] In this embodiment, since the first standard part is a standard part between the materials on the workbench of the tab die-cutting machine when the tab die-cutting machine is working, the measurement environment where the first standard part is located is consistent with the measurement environment when producing the tabbed sheet, and the gray level of the first standard part is consistent with that of the tabbed sheet. Therefore, the first standard part can be used to replace the actual tabbed sheet, thereby improving the consistency between the first measurement value and the measurement value obtained by the measuring device when measuring the tab spacing during the production of the tabbed sheet. Furthermore, the measuring ability of the measuring device can be verified online based on the first measurement value, and the accuracy of the first verification result obtained under the online verification method can be improved.

[0041] In one embodiment, according to the target measurement value and the target reference value, determining the verification index value of the measuring device includes:

[0042] Determining the bias result between the first actual length of the tab spacing of each dimension on the first standard part and the corresponding first measurement value; the target reference value includes the first actual length of the tab spacing of each dimension on the first standard part;

[0043] Determining the verification index value of the measuring device according to the first bias result corresponding to each tab spacing on the first standard part.

[0044] In this embodiment, by determining the bias result between the first actual length of the tab spacing of each dimension on the first standard part and the corresponding first measurement value, and determining the verification index value of the measuring device according to the first bias result corresponding to each tab spacing on the first standard part. By performing bias analysis on the first measurement value, the measurement accuracy and consistency of the measuring device for tab spacings of different dimensions can be evaluated, the reliability of the obtained verification index value can be improved, and thus the reliability and accuracy of the first verification result obtained based on the verification index value can be improved.

[0045] In one embodiment, according to the first bias result corresponding to each tab spacing on the first standard part, determining the verification index value of the measuring device includes:

[0046] Fitting the first bias results corresponding to the tab spacings of each dimension on the first standard part to obtain the first linearity;

[0047] Taking the first bias results corresponding to the tab spacings of each dimension on the first standard part and the first linearity as the verification index values.

[0048] In this embodiment, the first linearity is obtained by fitting the first bias results corresponding to the tab spacings on the first standard part. The first bias results corresponding to the tab spacings on the first standard part and the first linearity are used as the calibration index values, so as to realize using the results obtained from the linear bias analysis as the calibration index values, enabling the calibration index values to cover the change trends of tab spacings of different sizes, and calibrating the measurement accuracy and reliability of the measurement device for tab spacings of different sizes.

[0049] In one of the embodiments, according to the first comparison result, the measurement ability of the measurement device for the target length is calibrated to obtain the first calibration result of the measurement device, including:

[0050] If the first comparison result meets the first calibration condition, it is determined that the first calibration result is that the measurement ability of the length of the tab and the tab plate is normal; the first calibration condition is that the first linearity is less than or equal to the tab spacing tolerance multiplied by the first preset multiple, and each first bias result is less than or equal to the tab spacing tolerance multiplied by the first preset multiple;

[0051] If the first comparison result does not meet the first calibration condition, it is determined that the first calibration result is that the measurement ability of the length of the tab and the tab plate is abnormal.

[0052] In this embodiment, by judging whether the first linearity is less than or equal to the tab spacing tolerance multiplied by the first preset multiple, and whether each first bias result is less than or equal to the tab spacing tolerance multiplied by the first preset multiple, the first calibration result is determined based on a more comprehensive calibration index value, improving the reliability and accuracy of the obtained first calibration result, and being able to reduce the cost required for calibration.

[0053] In one of the embodiments, the method further includes:

[0054] The measurement device measures the lengths of the tabs of various sizes on the first standard part in the target direction to obtain the second measurement values of the tabs of various sizes in the target direction; the target direction includes the first direction where the maximum length of the first standard part is located and / or the second direction perpendicular to the first direction;

[0055] Obtain the second bias results of the second actual lengths and the second measurement values of the tabs of various sizes on the first standard part in the same direction;

[0056] According to the second bias results corresponding to the tabs of various sizes in the same direction and the tab length tolerance, the measurement ability of the measurement device for the tab sizes is calibrated to obtain the second calibration result of the measurement device.

[0057] In this embodiment, a measuring device measures the lengths of the tabs of each dimension on the first standard part in the target direction to obtain second measurement values of the tabs of each dimension in the target direction, obtains second bias results of the second actual lengths and the second measurement values of the tabs of each dimension on the first standard part in the same direction, and calibrates the measuring ability of the measuring device for the tab dimensions according to the second bias results corresponding to the tabs of each dimension in the same direction and the tab length tolerances, so as to obtain a second calibration result of the measuring device. By performing bias analysis on the second measurement values, the measurement accuracy and consistency of the measuring device for tabs of different dimensions can be evaluated, and the reliability and accuracy of the obtained second calibration result can be improved.

[0058] In one embodiment, calibrating the measuring ability of the measuring device for the tab dimensions according to the second bias results corresponding to the tabs of each dimension in the same direction and the tab length tolerances to obtain a second calibration result of the measuring device includes:

[0059] Fitting the second bias results corresponding to the same direction to obtain a second linearity;

[0060] Comparing the second linearity with a second preset multiple of the tab length tolerance, and comparing each second bias result with a second preset multiple of the tab length tolerance to obtain a second comparison result;

[0061] According to the second comparison result, calibrate the measuring ability of the measuring device for the tab dimensions to obtain a second calibration result.

[0062] In this embodiment, by fitting the second bias results corresponding to the same direction to obtain a second linearity, comparing the second linearity with a second preset multiple of the tab length tolerance, and comparing each second bias result with a second preset multiple of the tab length tolerance to obtain a second comparison result, and calibrating the measuring ability of the measuring device for the tab dimensions according to the second comparison result to obtain a second calibration result. Thus, it is possible to determine the second calibration result based on a more comprehensive linear bias analysis result, and improve the reliability and accuracy of the obtained second calibration result.

[0063] In one embodiment, calibrating the measuring ability of the measuring device for the tab dimensions according to the second comparison result to obtain a second calibration result includes:

[0064] If the second comparison result meets the second calibration condition, it is determined that the second calibration result is that the measuring ability of the tab dimensions is normal; the second calibration condition is that the second linearity is less than or equal to a second preset multiple of the preset tolerance, and each second bias result is less than or equal to a second preset multiple of the preset tolerance;

[0065] If the second comparison result does not meet the calibration condition, it is determined that the second calibration result is that the measuring ability of the tab dimensions is abnormal.

[0066] In this embodiment, when the second comparison result meets the second verification condition, it is determined that the measurement ability of the tab size is normal, and when the second comparison result does not meet the verification condition, it is determined that the measurement ability of the tab size is abnormal, so as to determine the second verification result based on a more comprehensive linear bias analysis result, improving the reliability and accuracy of the obtained second verification result.

[0067] In one embodiment, obtaining the target measurement value obtained by the measuring device for measuring the target tab spacing includes:

[0068] If the verification method is the stability verification method, at a preset verification moment, the measuring device measures the tab spacing of the second standard part on the conveying roller to obtain a third measurement value, and uses the third measurement value as the target measurement value; the gray level of the second standard part is the same as that of the tab and the tab sheet.

[0069] In this embodiment, since the gray level of the second standard part is the same as that of the tab and the tab sheet, the edge finding accuracy of the measuring device can be evaluated, and the consistency between the third measurement value and the measurement value obtained by the measuring device when measuring the tab spacing during the production of the tab and the tab sheet can be improved. Furthermore, based on the third measurement value, the measurement ability of the measuring device is verified in the stability verification method, and the accuracy of the first verification result obtained in the stability verification method is improved.

[0070] In one embodiment, determining the verification index value of the measuring device according to the target measurement value and the target reference value includes:

[0071] Determining the first difference between the third actual length of the tab spacing on the second standard part and the third measurement value; the target reference value includes the third actual length;

[0072] Determining the verification index value of the measuring device according to the first difference.

[0073] In this embodiment, by determining the first difference between the third actual length of the tab spacing on the second standard part and the third measurement value, and determining the verification index value of the measuring device according to the first difference, since the third actual length of the tab spacing on the second standard part is used as the target reference value, and since the target reference value is more accurate than the measurement data obtained by traditional manual measurement as the reference value, therefore, the verification index value obtained based on the more accurate target reference value is also more accurate, thus improving the accuracy of the first verification result obtained based on the verification index value.

[0074] In one embodiment, determining the verification index value of the measuring device according to the first difference includes:

[0075] Taking the first difference as the verification index value of the measuring device.

[0076] In this embodiment, the first difference is directly used as the calibration index value of the measuring device, making the determination of the calibration index value faster and more convenient, improving the efficiency of obtaining the calibration index value, and further improving the efficiency of obtaining the first calibration result.

[0077] In one embodiment, according to the first comparison result, the measuring ability of the measuring device for the target length is calibrated to obtain the first calibration result of the measuring device, including:

[0078] If the first comparison result is that the first difference is less than or equal to the tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measuring ability of the length of the tab and the tab is normal;

[0079] If the first comparison result is that the first difference is greater than the tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measuring ability of the length of the tab and the tab is abnormal.

[0080] In this embodiment, if the first comparison result is that the first difference is less than or equal to the tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measuring ability of the length of the tab and the tab is normal; if the first comparison result is that the first difference is greater than the tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measuring ability of the length of the tab and the tab is abnormal. This method is relatively fast and simple, thus improving the efficiency of the obtained first calibration result.

[0081] In one embodiment, the method further includes:

[0082] The length of the tab on the second standard part in the target direction is measured by the measuring device to obtain a fourth measurement value of the tab in the target direction; the target direction includes a first direction where the maximum length of the second standard part is located and / or a second direction perpendicular to the first direction;

[0083] Obtain a second difference between the fourth actual length and the fourth measurement value of the tab on the second standard part in the same direction;

[0084] According to the second difference corresponding to the tab on the second standard part in the same direction and the tab length tolerance, the measuring ability of the measuring device for the tab size is calibrated to obtain the second calibration result of the measuring device.

[0085] In this embodiment, the length of the tab on the second standard part in the target direction is measured by the measuring device to obtain a fourth measurement value of the tab in the target direction, a second difference between the fourth actual length and the fourth measurement value of the tab on the second standard part in the same direction is obtained, and then according to the second difference corresponding to the tab on the second standard part in the same direction and the tab length tolerance, the measuring ability of the measuring device for the tab size is calibrated to obtain the second calibration result of the measuring device, realizing the calibration of the measuring ability of the measuring device for the tab size.

[0086] In one embodiment, according to the second difference corresponding to the tabs on the second standard part in the same direction and the tab length tolerance, the measurement ability of the measuring device for the tab size is verified to obtain the second verification result of the measuring device, including:

[0087] Compare the second difference corresponding to the tabs on the second standard part in the same direction with the second preset multiple of the tab length tolerance to obtain a third comparison result;

[0088] According to the third comparison result, verify the measurement ability of the measuring device for the tab size to obtain the second verification result of the measuring device.

[0089] In this embodiment, by comparing the second difference corresponding to the tabs on the second standard part in the same direction with the second preset multiple of the tab length tolerance to obtain a third comparison result, and according to the third comparison result, verifying the measurement ability of the measuring device for the tab size to obtain the second verification result of the measuring device, the measurement ability of the measuring device for the tab size is verified at long-term intervals.

[0090] In one embodiment, according to the third comparison result, verify the measurement ability of the measuring device for the tab size to obtain the second verification result of the measuring device, including:

[0091] If the third comparison result is that the second difference is less than or equal to the second preset multiple of the tab length tolerance, it is determined that the second verification result is that the measurement ability of the tab size is normal;

[0092] If the third comparison result is that the second difference is greater than the second preset multiple of the tab length tolerance, it is determined that the second verification result is that the measurement ability of the tab size is abnormal.

[0093] In this embodiment, by judging whether the second difference is less than or equal to the second preset multiple of the tab length tolerance, the second verification result is determined as the measurement ability of the tab size. This judgment method is relatively simple and fast, thereby improving the efficiency of obtaining the second verification result.

[0094] In a second aspect, the present application also provides a verification device for a measuring device of a battery. The device includes:

[0095] A first acquisition module, configured to acquire a target measurement value obtained by the measuring device for measuring a target tab pitch;

[0096] A first determination module, configured to determine a verification index value of the measuring device according to the target measurement value and the target reference value;

[0097] The first verification module is used to verify the measurement ability of the measuring device for the target length according to the tab spacing tolerance and the verification index value, and obtain the first verification result of the measuring device; the target length is the length of the tab electrode used to produce a single battery cell, and the tab spacing tolerance is determined based on the preset total length tolerance corresponding to the target length and the total number of tab spacings on the tab electrode of the target length.

[0098] In a third aspect, the present application also provides a computer device. The computer device includes a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, the steps of any of the above methods are implemented.

[0099] In a fourth aspect, the present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of any of the above methods are implemented.

[0100] In a fifth aspect, the present application also provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of any of the above methods are implemented.

[0101] The above description is only an overview of the technical solutions of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. Description of the Drawings

[0102] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0103] Figure 1 is a schematic internal structure diagram of a computer device provided by an embodiment of the present application;

[0104] Figure 2 is one of the schematic flowcharts of the method for verifying the measuring device of the battery provided by an embodiment of the present application;

[0105] Figure 3 is a schematic flowchart of a method for obtaining a first verification result provided by an embodiment of the present application;

[0106] Figure 4 is a schematic flowchart of a method for obtaining a target measurement value in an offline verification mode provided by an embodiment of the present application;

[0107] Figure 5It is a schematic diagram of a measuring device under an offline calibration method provided by an embodiment of the present application;

[0108] Figure 6 It is a schematic flowchart of a method for obtaining calibration index values under an offline calibration method provided by an embodiment of the present application;

[0109] Figure 7 It is a schematic diagram of the structure of a first standard part provided by an embodiment of the present application;

[0110] Figure 8 It is a schematic diagram of the installation position of a first standard part provided by an embodiment of the present application;

[0111] Figure 9 It is one of the schematic flowcharts of a method for obtaining calibration index values under an online calibration method provided by an embodiment of the present application;

[0112] Figure 10 It is another schematic flowchart of a method for obtaining calibration index values under an online calibration method provided by an embodiment of the present application;

[0113] Figure 11 It is a schematic flowchart of a method for calibrating a measuring device for a battery with tab dimensions under an online calibration method provided by an embodiment of the present application;

[0114] Figure 12 It is a schematic flowchart of a method for obtaining a second calibration result provided by an embodiment of the present application;

[0115] Figure 13 It is a schematic diagram of the structure of a second standard part provided by an embodiment of the present application;

[0116] Figure 14 It is a schematic flowchart of a method for obtaining calibration index values under a stability calibration method provided by an embodiment of the present application;

[0117] Figure 15 It is a schematic flowchart of a method for calibrating a measuring device for a battery with tab dimensions under a stability calibration method provided by an embodiment of the present application;

[0118] Figure 16 It is a schematic flowchart of another method for calibrating a measuring device for a battery with tab dimensions under a stability calibration method provided by an embodiment of the present application;

[0119] Figure 17 It is the second schematic flowchart of a method for calibrating a measuring device for a battery provided by an embodiment of the present application;

[0120] Figure 18 It is a schematic diagram of the structure of a calibration device for a battery measuring device provided by an embodiment of the present application. Detailed implementation manners

[0121] The embodiments of the technical solution of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0122] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above description of the drawings are intended to cover non-exclusive inclusion.

[0123] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means more than two, unless otherwise specifically defined.

[0124] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0125] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0126] In the description of the embodiments of the present application, the term "a plurality of" refers to more than two (including two). Similarly, "a plurality of groups" refers to more than two groups (including two groups), and "a plurality of sheets" refers to more than two sheets (including two sheets).

[0127] In the production process of the tabbed electrode, the electrode material can be cut by means of an electrode die cutter to form a tabbed electrode with tabs, and a measuring device measures the target length of the tabbed electrode required to produce a single battery cell. The tabbed electrode with this target length is wound into a battery cell. Therefore, the accuracy of the measuring device is crucial, and it is necessary to calibrate the accuracy of the measuring device.

[0128] Currently, an operator manually intercepts the tab electrode sheet required for producing a battery cell, places the intercepted tab electrode sheet on a measurement table, uses a flexible ruler or a steel ruler to measure the length of the intercepted tab electrode sheet, and compares the measurement data with the measured value of the measuring device to obtain the calibration result of the measuring device for the target length.

[0129] However, since the measurement method is greatly affected by the subjectivity of the measurement personnel, the test method affects the accuracy of the measurement data obtained by the measurement personnel, and the measurement error is large, resulting in the problem that the accuracy of the obtained calibration result is relatively low for this method.

[0130] To solve the above technical problems, an embodiment of the present application provides a method for calibrating a measuring device of a battery, which can be applied to a Figure 1 computer device as shown. The computer device can be a terminal. The computer device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it realizes a method for calibrating a measuring device of a battery. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, a trackball, or a touchpad provided on the housing of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0131] Those skilled in the art can understand that Figure 1 the structure shown in

[0132] is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have a different component layout.

[0132] The following introduces the present application in combination with embodiments. In one embodiment, as Figure 2 shown, Figure 2 is one of the flow diagrams of the method for calibrating a measuring device of a battery provided by an embodiment of the present application. Taking the application of this method to the Figure 1 computer device as an example, it includes the following steps S201 - S203:

[0133] S201. Obtain the target measurement value obtained by the measuring device for measuring the target tab distance.

[0134] The measuring device may include a Charge-Coupled Device (CCD) measuring device, a laser measuring device, etc. The calibration methods may include an offline calibration method, an online calibration method, and a stability calibration method. The offline calibration method refers to a method of transferring the sample tab pole pieces intercepted by the operator, which have been measured by the measuring device but have not reported an abnormality, to the measuring table, and measuring the length of the sample tab pole pieces placed on the measuring table by an image measuring instrument to calibrate the measuring ability of the measuring device for the length of the tab pole pieces. The online calibration method refers to a method of calibrating the measuring ability of the measuring device for the length of the tab pole pieces by measuring the tab distance on the first standard part during the production process of producing tab pole pieces by a tab die-cutting machine. Here, the first standard part is a standard part arranged between the first pole piece material and the second pole piece material, and the tab distances on the first standard part have multiple specifications. The stability calibration method refers to a method of calibrating the measuring ability of the measuring device for the length of the tab pole pieces by measuring the tab distance on the second standard part at a preset calibration time. Here, the second standard part is a standard part installed on the conveying roller, and the second standard part may include one tab distance.

[0135] One target tab distance corresponds to one target measurement value. In the offline calibration method, one target tab distance refers to one tab distance on the sample tab pole piece, and the number of tab distances on the sample tab pole piece may be at least one; in the online calibration method, one target tab distance refers to one tab distance on the first standard part; in the stability calibration method, one target tab distance refers to one tab distance on the second standard part.

[0136] S202. Determine the calibration index value of the measuring device according to the target measurement value and the target reference value.

[0137] The target reference value corresponding to the offline calibration method refers to the measurement value obtained by the image measuring instrument for measuring the length of the sample tab pole pieces placed on the measuring table. The target reference value corresponding to the online calibration method refers to the actual length of the tab distance on the first standard part. One tab distance on the first standard part corresponds to one actual length and one target measurement value. The target reference value corresponding to the stability calibration method refers to the actual length of the tab distance on the second standard part. One tab distance on the second standard part corresponds to one actual length and one target measurement value.

[0138] In the offline calibration method, the difference between the target measurement value and the corresponding target reference value can be determined, and this difference is used as the calibration index value of the measurement index.

[0139] In the online calibration mode, the deviation result between the actual length of the tab spacing of each dimension on the first standard part and the corresponding target measurement value can be determined, and the slope is obtained by fitting the first deviation results corresponding to the tab spacings on the first standard part. The first deviation results corresponding to the tab spacings on the first standard part and the slope are used as the calibration index values.

[0140] In the stability calibration mode, the difference between the actual length of the tab spacing on the second standard part and the corresponding target measurement value can be determined, and this difference is used as the calibration index value of the measurement index.

[0141] S203. According to the tab spacing tolerance and the calibration index value, calibrate the measurement ability of the measuring device for the target length to obtain the first calibration result of the measuring device; the target length is the length of the tabbed pole piece used to produce a battery cell, and the tab spacing tolerance is determined based on the preset total length tolerance corresponding to the target length and the total number of tab spacings on the tabbed pole piece of the target length.

[0142] In the embodiments of the present application, the measurement ability can evaluate the accuracy of the target length measured by the measuring device. The greater the measurement ability, the higher the accuracy of the target length measured by the measuring device, that is, the measurement ability is positively correlated with the accuracy of the target length measured by the measuring device.

[0143] Currently, the length of the tabbed pole piece used to produce a battery cell is 10 meters to 20 meters, that is, the target length is 10 meters to 20 meters. Exemplarily, the preset total length tolerance corresponding to a target length of 10 meters is 8 millimeters, and the preset total length tolerance corresponding to a target length of 20 meters is 10 millimeters, that is, the preset total length tolerance corresponding to the target length between 10 meters and 20 meters is 8 millimeters to 10 millimeters.

[0144] Since each tab spacing on the tabbed pole piece follows a normal distribution, the target length = L1 + L2 + … + Ln, where L1 is the first tab spacing on the tabbed pole piece of the target length, L2 is the second tab spacing on the tabbed pole piece of the target length, Ln is the nth tab spacing on the tabbed pole piece of the target length, and n is the total number of tab spacings on the tabbed pole piece of the target length. By inversely applying the additivity of the normal distribution, the following formula (1) can be obtained:

[0145] (1)

[0146] Since the standard deviation of each tab spacing is basically the same, based on formula (1), the following formula (2) can be obtained:

[0147] (2)

[0148] Among them, represents the preset total length tolerance, represents the tolerance of the tab spacing corresponding to the first tab spacing, represents the tolerance of the tab spacing corresponding to the second tab spacing, represents the tolerance of the tab spacing corresponding to the nth tab spacing.

[0149] The value of T can be calculated based on formula (2), and the calculated value of T is used as the tolerance of the tab spacing. Alternatively, the value obtained by multiplying the value of T by a preset coefficient is used as the tolerance of the tab spacing.

[0150] Based on the normal distribution property of the tab spacing, by inversely applying the additivity of the normal distribution, the verification requirement for the target length is decomposed into smaller units, i.e., the tab spacing. Through theoretical derivation and calculation, the evaluation object is changed from the target length to the tab spacing. By determining the tolerance of the tab spacing, the accuracy of the tab spacing measured by the measuring device is judged, that is, the measuring ability of the measuring device for the tab spacing is verified, and then the measuring ability of the measuring device for the target length is verified.

[0151] In a possible implementation, the verification index value can be compared with the tolerance of the tab spacing multiplied by a first preset multiple to obtain a first comparison result. According to the first comparison result, the measuring ability of the measuring device for the target length is verified to obtain a first verification result of the measuring device. Exemplarily, in the offline verification mode, if the first comparison result is that the verification index value is less than or equal to the tolerance of the tab spacing multiplied by the first preset multiple, it is determined that the first verification result is that the measuring ability of the length of the tab and pole piece is normal; if the first comparison result is that the verification index value is greater than the tolerance of the tab spacing multiplied by the first preset multiple, it is determined that the first verification result is that the measuring ability of the length of the tab and pole piece is abnormal.

[0152] In another possible implementation, the verification index value can be divided by a first preset coefficient to obtain a first quotient value, and the tolerance of the tab spacing can be divided by a second preset coefficient to obtain a second quotient value. If the first quotient value is less than or equal to the second quotient value, it is determined that the first verification result is that the measuring ability of the measuring device for the target length is normal. If the first quotient value is greater than the second quotient value, it is determined that the first verification result is that the measuring ability of the measuring device for the target length is abnormal.

[0153] In this embodiment, by obtaining the target measurement value measured by the measuring device for the target tab spacing, according to the target measurement value and the target reference value, the verification index value of the measuring device is determined. Then, based on the tolerance of the tab spacing and the verification index value, the measuring ability of the measuring device for the target length is verified to obtain a first verification result of the measuring device. Since this method does not require a measurement person to measure the length of the intercepted tab and pole piece to obtain measurement data and obtain the verification result of the measuring device, but verifies the measuring ability of the measuring device for the tab spacing through the determined tolerance of the tab spacing, and then verifies the measuring ability of the measuring device for the target length, the accuracy of the obtained first verification result is improved.

[0154] In one embodiment, the tab pitch tolerance is determined based on the ratio of a preset total length tolerance to the square root of the total number.

[0155] The value of T can be calculated based on formula (2), and the calculated value of T is used as the tab pitch tolerance. Alternatively, the value obtained by multiplying the value of T by a preset coefficient is used as the tab pitch tolerance.

[0156] In this embodiment, the tab pitch tolerance is determined based on the ratio of the preset total length tolerance to the square root of the total number, so that the determined tab pitch tolerance meets the control requirements of the actual preset total length tolerance. When the tab pitch tolerance meets the control requirements of the actual preset total length tolerance, the measurement ability of the measuring device for the target length is calibrated, thereby improving the accuracy of the obtained first calibration result.

[0157] In one embodiment, the tab pitch tolerance is equal to the ratio.

[0158] In this embodiment, the tab pitch tolerance is equal to the ratio, realizing the calibration of the measurement ability of the measuring device for the target length when the tab pitch tolerance meets the control requirements of the actual preset total length tolerance, thereby improving the accuracy of the obtained first calibration result.

[0159] In one embodiment, as Figure 3 shown, Figure 3 FIG. is a schematic flowchart of a method for obtaining a first calibration result provided by an embodiment of the present application. This embodiment relates to a possible implementation manner of how to calibrate the measurement ability of a measuring device for a target length according to the tab pitch tolerance and the calibration index value to obtain the first calibration result of the measuring device. On the basis of the above embodiment, the above S203 may include the following steps S301-S302:

[0160] S301, comparing the calibration index value corresponding to the calibration method with the tab pitch tolerance of the first preset multiple to obtain a first comparison result.

[0161] S302, calibrating the measurement ability of the measuring device for the target length according to the first comparison result to obtain the first calibration result of the measuring device.

[0162] Taking the offline calibration method as an example of the calibration method, in a possible implementation manner, if the first comparison result is that the calibration index value is less than or equal to the tab pitch tolerance of the first preset multiple, it is determined that the measurement ability of the length of the tab and the tab is normal; if the first comparison result is that the calibration index value is greater than the tab pitch tolerance of the first preset multiple, it is determined that the measurement ability of the length of the tab and the tab is abnormal.

[0163] In another possible implementation, if the quotient obtained by dividing the verification index value by the tolerance of the tab distance is less than or equal to the first preset multiple, it is determined that the measurement ability of the length of the tab and electrode is normal for the first verification result; if the quotient obtained by dividing the verification index value by the tab distance of the first preset multiple is greater than the first preset multiple, it is determined that the measurement ability of the length of the tab and electrode is abnormal for the first verification result.

[0164] In this embodiment, by comparing the verification index value corresponding to the verification method with the tab distance tolerance of the first preset multiple to obtain the first comparison result, and based on the first comparison result, verifying the measurement ability of the measurement device for the target length to obtain the first verification result of the measurement device, the accuracy of the obtained first verification result is improved.

[0165] In one embodiment, if the verification method is an offline verification method, the target measurement value can be obtained in the following manner. As Figure 4 shown, Figure 4 FIG. is a schematic flowchart of a method for obtaining a target measurement value under an offline verification method provided by an embodiment of the present application. The above S201, obtaining the target measurement value obtained by the measurement device measuring the target tab distance, may include the following steps S401-S402:

[0166] S401, if the verification method is an offline verification method, then use the tab and electrode with a preset length whose tab distance has been measured by the measurement device as the sample tab and electrode; the preset length is less than the target length.

[0167] S402, use the measurement value obtained by the measurement device measuring the tab distance on the sample tab and electrode as the target measurement value.

[0168] The sample tab and electrode refers to the tab and electrode with a preset length whose tab distance has been measured by the measurement device, and no abnormality has been reported during the measurement process. During the process of the tab die-cutting machine producing the tab and electrode, the measurement device will measure the tab distance on the produced tab and electrode. The tab and electrode with a preset length that has been measured by the measurement device but no abnormality has been reported can be used as the sample tab and electrode, and the measurement value corresponding to the tab distance on the sample tab and electrode is used as the target measurement value.

[0169] In this embodiment, if the verification method is an offline verification method, the tab pole piece whose preset length of the tab spacing has been measured by the measuring device is used as the sample tab pole piece, and the measurement value obtained by the measuring device measuring the tab spacing on the sample tab pole piece is used as the target measurement value. Thus, based on different verification methods, different strategies are adopted to obtain the target measurement value, so that the obtained target measurement value is more in line with the corresponding verification method. In addition, since the length of the sample tab pole piece is less than or equal to the target length, not only can the cost required for verifying the measurement capability of the measuring device be reduced, but also a verification index value can be obtained by obtaining a smaller number of target measurement values, using a smaller number of target measurement values ​​and corresponding target reference values, thereby improving the efficiency of obtaining the verification index value, and further improving the efficiency of obtaining the first verification result.

[0170] In one embodiment, when the verification method is an offline verification method, the target reference value corresponding to the offline verification method can be obtained in the following manner:

[0171] The tab spacing on the sample tab pole piece on the measuring table is measured by an image measuring instrument to obtain a target reference value corresponding to the offline calibration method; a weight is hung at one end of the sample tab pole piece, and the gravity of the weight is consistent with the tension of the production machine of the tab die-cutting machine.

[0172] like Figure 5 As shown, Figure 5 It is a schematic diagram of a measuring device in an off-line calibration mode provided in an embodiment of the present application. Figure 5 The image measuring instrument in the embodiment can be a two-dimensional lens 51. The sample tab pole piece 52 is placed on a measuring table 53, and a weight 54 is hung at one end of the sample tab pole piece 52. The gravity of the weight is consistent with the tension of the production machine of the tab die-cutting machine, so that the measurement environment of the sample tab pole piece is consistent with the measurement environment of the production machine, thereby improving the accuracy of the measurement capability of the measuring equipment in the actual production process of the tab pole piece.

[0173] Due to the current calibration method of manually measuring the length of the tab pole piece placed on the measuring table, the state of the tab pole piece on the measuring table cannot be consistent with the state of the tab pole piece measured by the measuring equipment in the production process of the tab pole piece, and environmental factors such as the tension of the tab pole piece on the measuring table and the gap between the tab pole piece and the table surface of the measuring table are not controlled, which affects the accuracy of the current calibration method. However, through this embodiment, the measurement environment of the sample tab pole piece is consistent with the measurement environment of the production machine, so that the obtained target reference value is more accurate, thereby improving the accuracy and effectiveness of the first calibration result.

[0174] In this embodiment, an image measuring instrument is used to measure the ear pitch on the sample tab and tabbed plate on the measuring table, and the target reference value corresponding to the offline calibration method is obtained. Since the gravity of the weight is consistent with the tension of the production machine of the tab die-cutting machine, the measuring environment of the sample tab and tabbed plate is kept consistent with the measuring environment of the production machine, so that the target reference value is more in line with the measuring environment of the production machine. The target reference value is more accurate than the measurement data obtained by traditional manual measurement as the reference value, thus improving the accuracy of the first calibration result of the obtained measuring device.

[0175] In one embodiment, as Figure 6 shown, Figure 6 FIG. is a schematic flowchart of a method for obtaining a calibration index value in an offline calibration method provided by an embodiment of the present application. This embodiment relates to a possible implementation manner of determining the calibration index value of a measuring device according to a target measurement value and a target reference value. On the basis of the above embodiment, the above S202 may include the following steps S601-S602:

[0176] S601, determine the measurement difference between the target reference value corresponding to the offline calibration method and the target measurement value.

[0177] Exemplarily, if the ear pitch on the sample tab and tabbed plate includes a first ear pitch and a second ear pitch, the first ear pitch corresponds to a first target measurement value and a first target reference value, and the second ear pitch corresponds to a second target measurement value and a second target reference value, then the first measurement difference between the first target reference value and the first target measurement value can be determined, and the second measurement difference between the second target reference value and the second target measurement value can be determined.

[0178] S602, determine the calibration index value of the measuring device according to the measurement difference.

[0179] In a possible implementation manner, the measurement difference can be used as the calibration index value of the measuring device. Combining the above example, the first measurement difference can be used as the first calibration index value, and the second measurement difference can be used as the second calibration index value, that is, the calibration index value in this step includes the first calibration index value and the second calibration index value.

[0180] In another possible implementation manner, the product of the measurement difference and a preset coefficient can be used as the calibration index value of the measuring device.

[0181] In this embodiment, by determining the measurement difference between the target reference value and the target measurement value corresponding to the offline calibration method, the calibration index value of the measuring device is determined according to the measurement difference. Since the target reference value is more accurate than the conventional measurement data obtained by manual measurement as the reference value, therefore, the calibration index value obtained based on the more accurate target reference value is also more accurate, thereby improving the accuracy of the first calibration result obtained based on the calibration index value.

[0182] In one embodiment, for S602 above, determining the calibration index value of the measuring device according to the measurement difference can be implemented in the following manner:

[0183] Take the measurement difference as the calibration index value of the measuring device.

[0184] In this embodiment, by directly taking the measurement difference as the calibration index value of the measuring device, the acquisition of the calibration index value is made more simple and fast, thereby improving the efficiency of obtaining the first calibration result based on the calibration index value.

[0185] In one embodiment, when the calibration method is the offline calibration method, for S302 above, according to the first comparison result, calibrating the measurement ability of the measuring device for the target length to obtain the first calibration result of the measuring device can be implemented in the following manner:

[0186] If the first comparison result is that the measurement difference is less than or equal to the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the pole piece is normal;

[0187] If the first comparison result is that the measurement difference is greater than the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the pole piece is abnormal.

[0188] It should be noted that in the offline calibration method, if only one measurement difference is obtained, only this measurement difference needs to be compared with the ear tab spacing tolerance of the first preset multiple; if multiple measurement differences are obtained, each measurement difference needs to be compared with the ear tab spacing tolerance of the first preset multiple. If each measurement difference is within the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the pole piece is normal. If there is at least one measurement difference greater than the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the pole piece is abnormal.

[0189] Combined with the above example, if both the first measurement difference and the second measurement difference are less than or equal to the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the pole piece is normal; if the first measurement difference and / or the second measurement difference is greater than the ear tab spacing tolerance of the first preset multiple, it is determined that the first calibration result is that the measurement ability of the length of the ear tab and the pole piece is abnormal.

[0190] Due to the low accuracy of the obtained verification result in the current verification method, there may be a situation where the measuring device has no abnormality, but the measuring ability of the measuring device is misjudged as abnormal and the measuring device is adjusted, resulting in an abnormal measuring ability after adjustment. There may also be a situation where the measuring device is abnormal, but the obtained measuring ability of the measuring device is normal. Therefore, the measurement error of the measuring device in actual application is relatively large. However, for the offline verification method provided in the embodiments of the present application, the obtained first verification result is relatively accurate. Therefore, based on this first verification result, it is possible to more accurately determine whether the measuring device is abnormal and reduce the measurement error of the measuring device in actual application.

[0191] In this embodiment, the size of the measurement difference is directly compared with the tolerance of the tab spacing of the first preset multiple to obtain a first comparison result. This method is relatively fast and simple, thereby improving the efficiency of obtaining the first comparison result and thus improving the efficiency of obtaining the first verification result.

[0192] In one embodiment, if the verification method is an online verification method, then for the above S201, obtaining the target measurement value obtained by the measuring device measuring the target tab spacing can be achieved through the following method:

[0193] The measuring device measures the tab spacings of multiple dimensions on the first standard part to obtain the first measurement values corresponding to the tab spacings of each dimension;

[0194] Among them, the target measurement value includes the first measurement values corresponding to the tab spacings of each dimension. The first standard part is a standard part arranged between the first electrode sheet material and the second electrode sheet material. The first electrode sheet material and the second electrode sheet material are materials on the workbench of the tab die-cutting machine when the tab die-cutting machine is working. The gray level of the first standard part is consistent with the gray level of the tab electrode sheet.

[0195] When the measuring device determines the first measurement value of the tab pitch of the first standard part by determining the positions of the two side edges of two adjacent tabs on the first standard part, after the computer device obtains the positions of the two side edges of the two adjacent tabs, it can use the middle position between the positions of the two side edges as a reference position, and use the distance between the two reference positions corresponding to the two tabs as the third measurement value. For example, use the middle position between the positions of the two side edges of one tab among two adjacent tabs as the first reference position, use the middle position between the positions of the two side edges of the other tab among two adjacent tabs as the second reference position, and use the distance between the first reference position and the second reference position as the first measurement value. Therefore, the accuracy of the first measurement value is determined by the edge-finding accuracy of the measuring device. Therefore, when the gray level of the second standard part is kept consistent with the gray level of the tab and the tab plate, the closer the first measurement value is to the corresponding actual tab pitch, the higher the edge-finding accuracy of the measuring device means. Thus, the edge-finding accuracy of the measuring device is evaluated through the first measurement value.

[0196] Figure 7 is a schematic structural diagram of a first standard part provided by an embodiment of the present application, Figure 8 is a schematic diagram of the installation position of a first standard part provided by an embodiment of the present application. As Figure 7 shown, the darker gray area represents the body 71 of the first standard part, and the lighter gray area represents the tabs 72 on the first standard part. The standard part includes tabs of 6 sizes and 5 different tab pitches. As Figure 8 shown, the first standard part 81 is arranged between the first tab plate material 83 and the second tab plate material 84 through the connecting tape 82. Since during the production process of the tab and tab plate, tabs will be cut out on the first tab plate material 83 and the second tab plate material 84, Figure 8 only shows the state when the tabs 85 have been cut out on the first tab plate material 83 and the second tab plate material 84. During the production process of the tab and tab plate, the measuring device 86 will measure the tab pitches of multiple sizes on the first standard part on the workbench of the tab die cutter to obtain the corresponding first measurement values. The connecting tape 82 can be a tape that can connect the first standard part 81 and the tab plate material together.

[0197] The target tab pitch refers to the tab pitches of multiple sizes on the first standard part, and the tab pitches of multiple sizes can cover the tab pitches of each size on the current tab and tab plate. The consistency of the gray level of the first standard part and the gray level of the tab and tab plate means that: the gray level of the body 71 of the first standard part is the same as the gray level of the actual body of the tab and tab plate or the similarity of the body gray levels is greater than the preset similarity, and the gray level of the tabs 72 on the first standard part is the same as the gray level of the tabs on the actual tab and tab plate or the similarity of the tab gray levels is greater than the preset similarity.

[0198] As Figure 7As shown, the dimensions of the tab pitch on the first standard part include five dimensions. If each tab pitch of the first standard part is measured once, five first measurement values can be obtained. In this embodiment, the measurement of each tab pitch of the first standard part can be cycled for a preset number of times. For example, if the preset number of times is 5, 25 first measurement values can be obtained.

[0199] In this embodiment, since the first standard part is the standard part between the materials on the workbench of the tab die-cutting machine when the tab die-cutting machine is working, the measurement environment where the first standard part is located is consistent with the measurement environment when producing tab electrodes, and the gray level of the first standard part is consistent with the gray level of the tab electrodes. Therefore, the first standard part can be used to replace the actual tab electrodes, thereby improving the consistency between the first measurement value and the measurement value obtained by the measuring device when measuring the tab pitch during the production of tab electrodes. Furthermore, based on the first measurement value, the measuring ability of the measuring device can be verified online, and the accuracy of the first verification result obtained in the online verification method can be improved.

[0200] In one embodiment, as Figure 9 shown, Figure 9 FIG. is one of the flow diagrams of the method for obtaining the verification index value in the online verification method provided by the embodiment of the present application. This embodiment relates to a possible implementation manner of determining the verification index value of the measuring device according to the target measurement value and the target reference value. On the basis of the above embodiment, the above S202 may include the following steps S901-S902:

[0201] S901, determining the bias result between the first actual length of the tab pitch of each dimension on the first standard part and the corresponding first measurement value; the target reference value includes the first actual length of the tab pitch of each dimension on the first standard part.

[0202] The difference between the first actual length of the tab pitch of one dimension on the first standard part and the corresponding first measurement value can be used as a bias result, or the product obtained by multiplying the difference by a preset value can be used as a bias result.

[0203] S902, determining the verification index value of the measuring device according to the first bias result corresponding to each tab pitch on the first standard part.

[0204] In one possible implementation manner, the first linearity can be obtained by fitting the first bias results corresponding to the tab pitches of each dimension on the first standard part, and the first bias results corresponding to the tab pitches of each dimension on the first standard part and the first linearity are used as the verification index values.

[0205] In another possible implementation manner, the first bias results corresponding to the tab pitches of each dimension on the first standard part can be used as the verification index values.

[0206] In this embodiment, by determining the bias result between the first actual length of the tab pitch of each dimension on the first standard part and the corresponding first measured value, and according to the first bias results corresponding to the tab pitches on the first standard part, the calibration index value of the measuring device is determined. By performing bias analysis on the first measured value, the measurement accuracy and consistency of the measuring device for tab pitches of different dimensions can be evaluated, the reliability of the obtained calibration index value can be improved, and thus the reliability and accuracy of the first calibration result obtained based on the calibration index value can be improved.

[0207] In one embodiment, as Figure 10 shown, Figure 10 FIG. 2 is a second flowchart of a method for obtaining a calibration index value in an online calibration mode provided by an embodiment of the present application. This embodiment relates to a possible implementation manner of determining the calibration index value of a measuring device according to the first bias results corresponding to the tab pitches on the first standard part. On the basis of the above embodiment, the above S902 may include the following steps S1001-S1002:

[0208] S1001, fit the first bias results corresponding to the tab pitches on the first standard part to obtain a first linearity.

[0209] As Figure 7 shown, the dimensions of the tab pitches on the first standard part include 5 dimensions. If each tab pitch of the first standard part is measured once, 5 first bias results can be obtained. In this embodiment, the tab pitches of the first standard part can be cyclically measured a preset number of times. For example, if the preset number of times is 5 times, 25 first bias results can be obtained, and a first linearity is obtained by fitting based on the 25 first bias results.

[0210] Fitting the first bias results corresponding to the tab pitches on the first standard part to obtain a first linearity. The first linearity can reflect the change trend of the accuracy of the measuring device in different measurement ranges. Linearity describes the law of the bias result changing with the reference value. If the linearity is good, it means that in the entire measurement range, the bias results of the measurement system are relatively stable and approximately linearly related to the reference value. This means that the accuracy of the measuring device at different measurement points is relatively consistent and there will be no significant deviation changes due to the size of the reference value. Among them, different measurement ranges in this embodiment refer to tab pitches of different dimensions.

[0211] S1002, use the first bias results corresponding to the tab pitches on the first standard part and the first linearity as the calibration index value.

[0212] In this embodiment, the first linearity is obtained by fitting the first bias results corresponding to the tab spacings on the first standard part, and the first bias results and the first linearity corresponding to the tab spacings on the first standard part are used as the calibration index values, so as to realize using the results obtained from the linear bias analysis as the calibration index values, enabling the calibration index values to cover the change trends of tab spacings of different sizes, and verifying the measurement accuracy and reliability of the measurement device for tab spacings of different sizes.

[0213] In one embodiment, when the calibration method is an on-line calibration method, for the above S302, according to the first comparison result, verifying the measurement ability of the measurement device for the target length to obtain the first calibration result of the measurement device can be implemented by the following method:

[0214] If the first comparison result meets the first calibration condition, it is determined that the first calibration result is that the measurement ability of the length of the tab and the tab plate is normal; the first calibration condition is that the first linearity is less than or equal to the tab spacing tolerance multiplied by the first preset multiple, and each first bias result is less than or equal to the tab spacing tolerance multiplied by the first preset multiple;

[0215] If the first comparison result does not meet the first calibration condition, it is determined that the first calibration result is that the measurement ability of the length of the tab and the tab plate is abnormal.

[0216] The on-line calibration method provided by the embodiments of the present application, compared with the current method of calibrating based on the measurement data of manual measurement, can reduce the cost required to verify the measurement ability of the measurement device, and the obtained first calibration result is relatively accurate. Therefore, based on this first calibration result, it can be more accurately determined whether there is an abnormality in the measurement device, and the measurement error of the measurement device in actual application can be reduced.

[0217] In this embodiment, by judging whether the first linearity is less than or equal to the tab spacing tolerance multiplied by the first preset multiple, and whether each first bias result is less than or equal to the tab spacing tolerance multiplied by the first preset multiple, the first calibration result is determined based on more comprehensive calibration index values, improving the reliability and accuracy of the obtained first calibration result, and being able to reduce the cost required for calibration.

[0218] In one embodiment, when the calibration method is an on-line calibration method, the measurement device can also measure the dimensions of the tabs on the first standard part to determine the measurement ability of the measurement device for the tab dimensions. As Figure 11 shown, Figure 11 is a schematic flowchart of a method for calibrating a measurement device for the battery of tab dimensions under an on-line calibration method provided by the embodiments of the present application. This method may include the following steps S1101-S1103:

[0219] S1101. Measure the lengths of the tabs of each dimension on the first standard part in the target direction using a measuring device to obtain the second measurement values of the tabs of each dimension in the target direction.

[0220] Among them, the target direction includes the first direction where the maximum length of the first standard part is located and / or the second direction perpendicular to the first direction.

[0221] As Figure 7 and Figure 8 shown, the number of tabs on the first standard part is 6, and the dimensions of each tab include the length in the first direction and the length in the second direction. The lengths of each tab in the first direction and / or the lengths of each tab in the second direction can be measured using a measuring device.

[0222] S1102. Obtain the second bias results of the second actual lengths and the second measurement values of the tabs of each dimension on the first standard part in the same direction.

[0223] Among them, the same direction in this step refers to the first direction or the second direction.

[0224] Taking the measurement of the length of a tab in the first direction in S1101 as an example, step S1101 can obtain the second measurement value of the length of the tab in the first direction. Determine the difference between the second actual length and the second measurement value of the length of the tab in the first direction, and use this difference as one of the second bias results corresponding to the tab. Similar to the above obtaining the first bias result, for the same tab, multiple second bias results of multiple measurements in the same direction can be obtained.

[0225] S1103. Verify the measurement ability of the measuring device for the tab dimensions based on the second bias results corresponding to the tabs of each dimension in the same direction and the tab length tolerances to obtain the second verification result of the measuring device.

[0226] In this step, the measurement ability of the measuring device for the length in this direction can be verified based on the multiple second bias results of multiple measurements of the tabs of all dimensions in the same direction and the corresponding tab length tolerances in this direction to obtain the second verification result.

[0227] In this embodiment, the lengths of the tabs of each dimension on the first standard part in the target direction are measured by a measuring device to obtain the second measurement values of the tabs of each dimension in the target direction. The second bias results of the second actual lengths and the second measurement values of the tabs of each dimension on the first standard part in the same direction are obtained. According to the second bias results corresponding to the tabs of each dimension in the same direction and the tab length tolerances, the measuring ability of the measuring device for the tab dimensions is verified to obtain the second verification result of the measuring device. By performing bias analysis on the second measurement values, the measurement accuracy and consistency of the measuring device for tabs of different dimensions can be evaluated, and the reliability and accuracy of the obtained second verification result can be improved.

[0228] In one embodiment, when the verification method is an on-line verification method, as Figure 12 shown, Figure 12 FIG. is a schematic flowchart of a method for obtaining a second verification result provided by an embodiment of the present application. The above S1103 may include the following steps S1201-S1203:

[0229] S1201, fit the second bias results corresponding to the same direction to obtain a second linearity.

[0230] S1202, compare the second linearity with the tab length tolerance of a second preset multiple, and compare each second bias result with the tab length tolerance of the second preset multiple to obtain a second comparison result.

[0231] In a possible implementation manner, the difference between each second bias result and the tab length tolerance of the second preset multiple may be determined, and based on the difference, it is determined whether each second bias result is less than or equal to the tab length tolerance of the second preset multiple to obtain a second comparison result.

[0232] In another possible manner, the quotient of each second bias result and the tab length tolerance of the second preset multiple may be determined, and according to the quotient, it is determined whether each second bias result is less than or equal to the tab length tolerance of the second preset multiple.

[0233] In the same way as comparing the second bias result with the tab length tolerance of the second preset multiple, based on the difference or quotient of the second linearity and the tab length tolerance of the second preset multiple, it can be determined whether the second linearity is less than or equal to the tab length tolerance of the second preset multiple.

[0234] S1203, according to the second comparison result, verify the measuring ability of the measuring device for the tab dimensions to obtain a second verification result.

[0235] If the second comparison result meets the second verification condition, it is determined that the measurement ability of the tab size is normal; the second verification condition is that the second linearity is less than or equal to the preset tolerance of the second preset multiple, and each second bias result is less than or equal to the preset tolerance of the second preset multiple; if the second comparison result does not meet the verification condition, it is determined that the measurement ability of the tab size is abnormal.

[0236] In this embodiment, the second linearity is obtained by fitting the corresponding second bias results in the same direction, the second linearity is compared with the tab length tolerance of the second preset multiple, and each second bias result is compared with the tab length tolerance of the second preset multiple to obtain the second comparison result. According to the second comparison result, the measurement ability of the measuring device for the tab size is verified to obtain the second verification result. Thus, the second verification result is determined based on a more comprehensive linear bias analysis result, improving the reliability and accuracy of the obtained second verification result.

[0237] In one embodiment, the above S1203, verifying the measurement ability of the measuring device for the tab size according to the second comparison result to obtain the second verification result, can be implemented in the following manner:

[0238] If the second comparison result meets the second verification condition, it is determined that the measurement ability of the tab size is normal; the second verification condition is that the second linearity is less than or equal to the preset tolerance of the second preset multiple, and each second bias result is less than or equal to the preset tolerance of the second preset multiple;

[0239] If the second comparison result does not meet the verification condition, it is determined that the measurement ability of the tab size is abnormal.

[0240] It should be noted that in the online verification mode, the first verification result can be obtained, or the second verification result can be obtained. Therefore, the verification of the measurement ability of the measuring device in the online verification mode is more comprehensive.

[0241] In this embodiment, when the second comparison result meets the second verification condition, it is determined that the measurement ability of the tab size is normal, and when the second comparison result does not meet the verification condition, it is determined that the measurement ability of the tab size is abnormal. Thus, the second verification result is determined based on a more comprehensive linear bias analysis result, improving the reliability and accuracy of the obtained second verification result.

[0242] In one embodiment, if the verification method is the stability verification method, then the above S201, obtaining the target measurement value obtained by the measuring device for measuring the target tab spacing, can be implemented in the following manner:

[0243] If the verification method is the stability verification method, at a preset verification time, the ear pitch of the second standard part on the conveying roller is measured by a measuring device to obtain a third measurement value, and the third measurement value is used as the target measurement value; the gray scale of the second standard part is the same as that of the ear electrode plate.

[0244] As Figure 13 shown, Figure 13 FIG. is a schematic structural diagram of a second standard part provided by an embodiment of the present application. The darker gray area represents the body 131 of the second standard part, and the lighter gray area represents the ear 132 on the second standard part. There are 2 ears and 1 ear pitch on this standard part. The gray scale of the second standard part being the same as that of the ear electrode plate means that the gray scale of the body 131 of the second standard part is the same as that of the body of the actual ear electrode plate or the similarity of the body gray scales is greater than a preset similarity, and the gray scale of the ear 132 on the second standard part is the same as that of the ear on the actual ear electrode plate or the similarity of the ear gray scales is greater than a preset similarity.

[0245] The second standard part can be arranged around the conveying roller. The preset verification time is, for example, 10:00 and 22:00 every day. At the preset verification time, the ear pitch of the second standard part on the conveying roller can be measured by a measuring device to obtain a third measurement value, and the third measurement value is used as the target measurement value.

[0246] Since the gray scale of the second standard part is kept the same as that of the ear electrode plate, the closer the third measurement value is to the corresponding actual ear pitch, the higher the edge-finding accuracy of the measuring device. Therefore, the edge-finding accuracy of the measuring device is evaluated through the third measurement value.

[0247] In this embodiment, since the gray scale of the second standard part is the same as that of the ear electrode plate, the edge-finding accuracy of the measuring device can be evaluated, and the consistency between the third measurement value and the measurement value obtained by the measuring device when measuring the ear pitch during the production of the ear electrode plate can be improved. Furthermore, based on the third measurement value, the measurement ability of the measuring device is verified in the stability verification method, and the accuracy of the first verification result obtained in the stability verification method is improved.

[0248] In one embodiment, when the verification method is the stability verification method, as Figure 14 shown, Figure 14 FIG. is a schematic flow chart of a method for obtaining a verification index value in the stability verification method provided by an embodiment of the present application. This embodiment relates to a possible implementation manner of how to determine the verification index value of the measuring device according to the target measurement value and the target reference value. On the basis of the above embodiment, the above S202 may include the following steps S1401-S1402:

[0249] S1401. Determine the first difference between the third actual length of the tab pitch on the second standard part and the third measurement value; the target reference value includes the third actual length.

[0250] S1402. Determine the calibration index value of the measuring device according to the first difference.

[0251] In a possible implementation, the first difference can be used as the calibration index value of the measuring device.

[0252] In another possible implementation, the result obtained by multiplying the first difference by a preset value can be used as the calibration index value of the measuring device.

[0253] In this embodiment, by determining the first difference between the third actual length of the tab pitch on the second standard part and the third measurement value, and determining the calibration index value of the measuring device according to the first difference. Since the third actual length of the tab pitch on the second standard part is used as the target reference value, and the target reference value is more accurate than the measurement data obtained by traditional manual measurement as the reference value. Therefore, the calibration index value obtained based on the more accurate target reference value is also more accurate, thereby improving the accuracy of the first calibration result obtained based on the calibration index value.

[0254] In an embodiment, for the above S1402, determining the calibration index value of the measuring device according to the first difference can be implemented in the following manner:

[0255] Use the first difference as the calibration index value of the measuring device.

[0256] In this embodiment, directly using the first difference as the calibration index value of the measuring device makes the determination of the calibration index value faster and more convenient, improves the efficiency of obtaining the calibration index value, and further improves the efficiency of obtaining the first calibration result.

[0257] In an embodiment, when the calibration method is the stability calibration method, for the above S302, according to the first comparison result, calibrate the measuring ability of the measuring device for the target length to obtain the first calibration result of the measuring device, which can be implemented in the following manner:

[0258] If the first comparison result is that the first difference is less than or equal to the tab pitch tolerance of the first preset multiple, determine that the first calibration result is that the measuring ability of the length of the tab and tab is normal;

[0259] If the first comparison result is that the first difference is greater than the tab pitch tolerance of the first preset multiple, determine that the first calibration result is that the measuring ability of the length of the tab and tab is abnormal.

[0260] In a possible implementation, the difference between the first difference and the tab spacing tolerance of the first preset multiple can be determined, and based on this difference, it can be judged whether the first difference is less than or equal to the tab spacing tolerance of the first preset multiple. If the difference is less than or equal to 0, it can be determined that the first difference is less than or equal to the tab spacing tolerance of the first preset multiple. In this case, it can be determined that the first verification result is that the measurement ability of the tab length of the tab and pole piece is normal. If the difference is greater than 0, it can be determined that the first difference is greater than the tab spacing tolerance of the first preset multiple. In this case, it can be determined that the first verification result is that the measurement ability of the tab length of the tab and pole piece is abnormal.

[0261] In another possible way, the quotient of the first difference and the tab spacing tolerance of the first preset multiple can be determined, and according to the quotient, it can be judged whether each second bias result is less than or equal to the tab length tolerance of the second preset multiple. If the quotient is greater than 0 and less than or equal to 1, it can be determined that the first difference is less than or equal to the tab spacing tolerance of the first preset multiple. In this case, it can be determined that the first verification result is that the measurement ability of the tab length of the tab and pole piece is normal. If the quotient is greater than 1, it can be determined that the first difference is greater than the tab spacing tolerance of the first preset multiple. In this case, it can be determined that the first verification result is that the measurement ability of the tab length of the tab and pole piece is abnormal.

[0262] In this embodiment, if the first comparison result is that the first difference is less than or equal to the tab spacing tolerance of the first preset multiple, it is determined that the first verification result is that the measurement ability of the tab length of the tab and pole piece is normal; if the first comparison result is that the first difference is greater than the tab spacing tolerance of the first preset multiple, it is determined that the first verification result is that the measurement ability of the tab length of the tab and pole piece is abnormal. This method is relatively quick and simple, thus improving the efficiency of the obtained first verification result.

[0263] In one embodiment, in the stability verification mode, if at a certain preset verification moment, the first verification result is that the measurement ability of the tab length of the tab and pole piece is abnormal, it means that there may be problems with the measurement device or the components of the tab die cutter. At this time, the tab die cutter can be controlled to stop running, and the cause of the problem can be analyzed and located in a timely manner. For example, when performing stability verification at 10 o'clock on April 10, 2025, if the first verification result is that the measurement ability of the tab length of the tab and pole piece is abnormal, the tab die cutter can be controlled to stop running in a timely manner after determining the abnormality, and the cause of the problem can be analyzed and located in a timely manner, thereby improving the long-term effectiveness of the measurement device for product measurement.

[0264] In one embodiment, when the verification mode is the stability verification mode, the measurement device can also be used to measure the dimensions of the tabs on the second standard part to determine the measurement ability of the measurement device for the tab dimensions. As Figure 15 shown, Figure 15It is a schematic flowchart of a method for calibrating a measuring device of a battery with tab dimensions under a stability verification method provided by an embodiment of the present application. The method may include the following steps S1501 - S1503:

[0265] S1501, measure the length of the tab on the second standard part in the target direction through the measuring device to obtain a fourth measurement value of the tab in the target direction.

[0266] Among them, the target direction includes a first direction where the maximum length of the second standard part is located and / or a second direction perpendicular to the first direction.

[0267] The length of the tab on the second standard part in the first direction can be measured through the measuring device, and / or the length of the tab in the second direction can be measured. The fourth measurement value can be obtained by measuring the length of at least one tab on the second standard part in the target direction through the measuring device.

[0268] S1502, obtain a second difference between the fourth actual length and the fourth measurement value of the tab on the second standard part in the same direction.

[0269] The same direction in this step refers to the first direction or the second direction. The measuring device can measure the length of one tab on the second standard part in one direction. Exemplarily, if the measuring device measures the length of one tab on the second standard part in the first direction to obtain a fourth measurement value A, then in this step, the second difference A between the fourth actual length of the tab in the first direction and the fourth measurement value A can be obtained. The measurement difference corresponding to the first direction can be used to calibrate the measurement ability of the measuring device for the length of the tab in the first direction.

[0270] Another exemplarily, if the measuring device measures the length of one tab on the second standard part in the second direction to obtain a fourth measurement value B, then in this step, the second difference B between the fourth actual length of the tab in the second direction and the fourth measurement value B can be obtained. The measurement difference corresponding to the second direction can be used to calibrate the measurement ability of the measuring device for the length of the tab in the second direction.

[0271] The measuring device can also measure the lengths of one tab on the second standard part in both the first direction and the second direction, then obtain the fourth measurement values corresponding to the two directions. Exemplarily, the length of one tab on the second standard part in the first direction can be measured to obtain a fourth measurement value A, and the length of the tab in the second direction can be measured to obtain a fourth measurement value B, and then the second difference A and the second difference B can be obtained.

[0272] S1503. According to the second difference corresponding to the tabs on the second standard part in the same direction and the tab length tolerance, verify the measurement ability of the measuring device for the tab size, and obtain the second verification result of the measuring device.

[0273] In a possible implementation, the second difference corresponding to the tabs on the second standard part in the same direction can be compared with the second preset multiple of the tab length tolerance to obtain a third comparison result. According to the third comparison result, verify the measurement ability of the measuring device for the tab size, and obtain the second verification result of the measuring device.

[0274] Exemplarily, if the second difference A and the second difference B are obtained in S1502, the second difference A can be compared with the second preset multiple of the tab length tolerance, and the second difference B can be compared with the second preset multiple of the tab length tolerance to obtain a third comparison result. If the third comparison result is that the second difference A is less than or equal to the second preset multiple of the tab length tolerance, and the second difference B is less than or equal to the second preset multiple of the tab length tolerance, it can be determined that the second verification result is that the measurement ability of the tab size is normal.

[0275] If the third comparison result is that there is at least one second difference among the second difference A and the second difference B that is greater than the second preset multiple of the tab length tolerance, it can be determined that the second verification result is that the measurement ability of the tab size is abnormal.

[0276] In another possible implementation, determine the quotient of the second difference corresponding to the tabs on the second standard part in the same direction and the tab length tolerance. Based on the comparison result of the quotient and the second preset multiple, verify the measurement ability of the measuring device for the tab size, and obtain the second verification result of the measuring device. Exemplarily, if the second difference A and the second difference B are obtained in S1502, the quotient A of the second difference A and the tab length tolerance can be determined, and the quotient B of the second difference B and the tab length tolerance can be determined. If the comparison result is that both the quotient A and the quotient B are less than or equal to the second preset multiple, it can be determined that the second verification result is that the measurement ability of the tab size is normal; if the comparison result is that there is at least one quotient among the quotient A and the quotient B that is greater than the second preset multiple, it can be determined that the second verification result is that the measurement ability of the tab size is abnormal.

[0277] It should be noted that in the stability verification method, the first verification result can be obtained, or the second verification result can be obtained. Therefore, the verification of the measurement ability of the measuring device in the stability verification method is more comprehensive.

[0278] In this embodiment, the length of the tab on the second standard part in the target direction is measured by a measuring device to obtain a fourth measurement value of the tab in the target direction. The second difference between the fourth actual length and the fourth measurement value of the tab on the second standard part in the same direction is obtained. Then, based on the second difference corresponding to the tab on the second standard part in the same direction and the tab length tolerance, the measuring ability of the measuring device for the tab size is calibrated to obtain a second calibration result of the measuring device, thereby realizing the calibration of the measuring ability of the measuring device for the tab size.

[0279] In one embodiment, as Figure 16 shown, Figure 16 FIG. is a schematic flow chart of a method for calibrating a measuring device of a battery with tab size under another stability calibration method provided by an embodiment of the present application. In the above S1503, based on the second difference corresponding to the tab on the second standard part in the same direction and the tab length tolerance, the measuring ability of the measuring device for the tab size is calibrated to obtain a second calibration result of the measuring device, which may include the following steps S1601-S1602:

[0280] S1601, compare the second difference corresponding to the tab on the second standard part in the same direction with the second preset multiple of the tab length tolerance to obtain a third comparison result.

[0281] S1602, based on the third comparison result, calibrate the measuring ability of the measuring device for the tab size to obtain a second calibration result of the measuring device.

[0282] Exemplarily, if the second difference A and the second difference B are obtained in S1502, the second difference A can be compared with the second preset multiple of the tab length tolerance, and the second difference B can be compared with the second preset multiple of the tab length tolerance to obtain a third comparison result. If the third comparison result is that the second difference A is less than or equal to the second preset multiple of the tab length tolerance, and the second difference B is less than or equal to the second preset multiple of the tab length tolerance, it can be determined that the second calibration result is that the measuring ability of the tab size is normal.

[0283] If the third comparison result is that there is at least one second difference among the second difference A and the second difference B that is greater than the second preset multiple of the tab length tolerance, it can be determined that the second calibration result is that the measuring ability of the tab size is abnormal.

[0284] It should be noted that the difference or quotient value between the second difference and the second preset multiple of the tab length tolerance can be determined, and based on the difference or quotient value, it can be judged whether the second difference is less than or equal to the second preset multiple of the tab length tolerance.

[0285] In this embodiment, by comparing the second difference corresponding to the tabs on the second standard part in the same direction with the tab length tolerance of the second preset multiple, a third comparison result is obtained. According to the third comparison result, the measurement ability of the measuring device for the tab size is verified to obtain the second verification result of the measuring device, so as to realize the long-term and intermittent verification of the measurement ability of the measuring device for the tab size.

[0286] In one embodiment, for S1602 above, according to the third comparison result, verifying the measurement ability of the measuring device for the tab size to obtain the second verification result of the measuring device can be achieved in the following manner:

[0287] If the third comparison result is that the second difference is less than or equal to the tab length tolerance of the second preset multiple, it is determined that the second verification result is that the measurement ability of the tab size is normal;

[0288] If the third comparison result is that the second difference is greater than the tab length tolerance of the second preset multiple, it is determined that the second verification result is that the measurement ability of the tab size is abnormal.

[0289] In one embodiment, in the stability verification mode, if at a certain preset verification moment, the second verification result obtained is that the measurement ability of the tab size is abnormal, it means that there may be problems with the measuring device or the components of the tab die-cutting machine. At this time, the tab die-cutting machine can be controlled to stop running, and the cause of the problem can be analyzed and located in a timely manner. For example, when performing stability verification at 10:00 on April 10, 2025, if the second verification result obtained is that the measurement ability of the tab size is abnormal, the tab die-cutting machine can be controlled to stop running in a timely manner after determining the abnormality, and the cause of the problem can be analyzed and located in a timely manner, so as to improve the long-term effectiveness of the measuring device for product measurement.

[0290] In this embodiment, by determining whether the second difference is less than or equal to the tab length tolerance of the second preset multiple, the second verification result is determined to be the measurement ability of the tab size. This judgment method is relatively simple and fast, thus improving the efficiency of obtaining the second verification result.

[0291] In one embodiment, in combination here Figure 17 To illustrate the overall process of the measurement device verification method for the battery, Figure 17 is the second flow diagram of the measurement device verification method for the battery provided by the embodiment of the present application. The method includes the following steps S1701 - S1705:

[0292] S1701, determine the ratio of the preset total length tolerance to the square root of the total number, and use this ratio as the tab pitch tolerance.

[0293] S1702, obtain the target measurement value obtained by the measuring device for measuring the target tab pitch.

[0294] S1703. Determine the calibration index value of the measuring device according to the target measurement value and the target reference value.

[0295] S1704. Compare the calibration index value corresponding to the calibration method with the tab spacing tolerance of the first preset multiple to obtain a first comparison result.

[0296] S1705. Calibrate the measurement ability of the measuring device for the target length according to the first comparison result to obtain a first calibration result of the measuring device.

[0297] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are sequentially shown according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same moment, but can be executed at different moments. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps in other steps.

[0298] Based on the same inventive concept, an embodiment of the present application further provides a calibration device for a battery measuring device for implementing the battery measuring device calibration method described above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the calibration device for the battery measuring device provided below can refer to the limitations on the battery measuring device calibration method in the above text, and will not be repeated here.

[0299] In one embodiment, as Figure 18 shown, Figure 18 FIG. is a schematic structural diagram of a calibration device for a battery measuring device provided by an embodiment of the present application. The device 1800 includes:

[0300] A first acquisition module 1801, configured to acquire a target measurement value obtained by the measuring device for measuring the target tab spacing;

[0301] A first determination module 1802, configured to determine the calibration index value of the measuring device according to the target measurement value and the target reference value;

[0302] The first verification module 1803 is configured to verify the measurement ability of the measuring device for the target length according to the tab end spacing tolerance and the verification index value, and obtain the first verification result of the measuring device; the target length is the length of the tab end electrode sheet used to produce a single battery cell, and the tab end spacing tolerance is determined based on the preset total length tolerance corresponding to the target length and the total number of tab end spacings on the tab end electrode sheet corresponding to the target length.

[0303] In one embodiment, the tab end spacing tolerance is determined based on the ratio of the preset total length tolerance to the square root of the total number.

[0304] In one embodiment, the tab end spacing tolerance is equal to the ratio.

[0305] In one embodiment, the first verification module 1803 includes:

[0306] The first comparison unit is configured to compare the verification index value corresponding to the verification method with the tab end spacing tolerance multiplied by a first preset multiple to obtain a first comparison result;

[0307] The first verification unit is configured to verify the measurement ability of the measuring device for the target length according to the first comparison result, and obtain the first verification result of the measuring device.

[0308] In one embodiment, the first acquisition module 1801 is specifically configured to, if the verification method is an offline verification method, use the tab end electrode sheet with a preset length whose tab end spacing has been measured by the measuring device as the sample tab end electrode sheet; use the measured value obtained by the measuring device for measuring the tab end spacings on the sample tab end electrode sheet as the target measured value; the preset length is less than or equal to the target length.

[0309] In one embodiment, the first acquisition module 1801 is further configured to measure the tab end spacings on the sample tab end electrode sheet on the measuring table through an image measuring instrument to obtain the target reference value corresponding to the offline verification method; one end of the sample tab end electrode sheet is hung with a weight, and the gravity of the weight is consistent with the tension of the production machine of the tab end die cutter.

[0310] In one embodiment, the first determination module 1802 includes:

[0311] The first determination unit is configured to determine the measurement difference between the target reference value and the target measured value corresponding to the offline verification method;

[0312] The second determination unit is configured to determine the verification index value of the measuring device according to the measurement difference.

[0313] In one embodiment, the second determination unit is specifically configured to use the measurement difference as the verification index value of the measuring device.

[0314] In one embodiment, the first verification unit is specifically configured to determine that the measurement ability of the length of the tab and the tabbed plate is normal if the first comparison result is that the measurement difference is less than or equal to the tolerance of the tab pitch of the first preset multiple;

[0315] If the first comparison result is that the measurement difference is greater than the tolerance of the tab pitch of the first preset multiple, it is determined that the measurement ability of the length of the tab and the tabbed plate is abnormal.

[0316] In one embodiment, the first acquisition module 1801 is specifically configured to, if the verification method is the online verification method, measure the tab pitches of multiple dimensions on the first standard part through a measuring device to obtain first measurement values corresponding to the tab pitches of each dimension;

[0317] Wherein, the target measurement values include the first measurement values corresponding to the tab pitches of each dimension, the first standard part is a standard part arranged between the first tabbed plate material and the second tabbed plate material, the first tabbed plate material and the second tabbed plate material are materials on the workbench of the tab die-cutting machine when the tab die-cutting machine is working, and the gray level of the first standard part is consistent with the gray level of the tab and the tabbed plate.

[0318] In one embodiment, the first determination module 1802 includes:

[0319] The third determination unit is configured to determine the bias result between the first actual length of the tab pitch of each dimension on the first standard part and the corresponding first measurement value; the target reference value includes the first actual length of the tab pitch of each dimension on the first standard part;

[0320] The fourth determination unit is configured to determine the verification index value of the measuring device according to the first bias results corresponding to the tab pitches of each on the first standard part.

[0321] In one embodiment, the fourth determination unit is specifically configured to fit the first bias results corresponding to the tab pitches of each dimension on the first standard part to obtain a first linearity;

[0322] The first bias results corresponding to the tab pitches of each dimension on the first standard part and the first linearity are used as the verification index values.

[0323] In one embodiment, the first verification unit is specifically configured to determine that the measurement ability of the length of the tab and the tabbed plate is normal if the first comparison result meets the first verification condition; the first verification condition is that the first linearity is less than or equal to the tolerance of the tab pitch of the first preset multiple, and each first bias result is less than or equal to the tolerance of the tab pitch of the first preset multiple;

[0324] If the first comparison result does not meet the first verification condition, it is determined that the measurement ability of the length of the tab and the tabbed plate is abnormal.

[0325] In one embodiment, the device further includes:

[0326] A second acquisition module, configured to measure the lengths of the tabs of each dimension on the first standard part in a target direction through a measuring device, so as to obtain second measurement values of the tabs of each dimension in the target direction; the target direction includes a first direction where the maximum length of the first standard part is located and / or a second direction perpendicular to the first direction;

[0327] A third acquisition module, which acquires a second bias result of the second actual length and the second measurement value of the tabs of each dimension on the first standard part in the same direction;

[0328] A second verification module is further configured to verify the measurement ability of the measuring device for the tab dimensions according to the second bias results corresponding to the tabs of each dimension in the same direction and the tab length tolerance, so as to obtain a second verification result of the measuring device.

[0329] In one embodiment, the second verification module includes:

[0330] A fitting unit, configured to fit the second bias results corresponding to the same direction to obtain a second linearity;

[0331] A second comparison unit, configured to compare the second linearity with a second preset multiple of the tab length tolerance, and compare each second bias result with a second preset multiple of the tab length tolerance, so as to obtain a second comparison result;

[0332] A second verification unit, configured to verify the measurement ability of the measuring device for the tab dimensions according to the second comparison result, so as to obtain a second verification result.

[0333] In one embodiment, the second verification unit is specifically configured to, if the second comparison result meets the second verification condition, determine that the second verification result is that the measurement ability of the tab dimensions is normal; the second verification condition is that the second linearity is less than or equal to a second preset multiple of the preset tolerance, and each second bias result is less than or equal to a second preset multiple of the preset tolerance;

[0334] If the second comparison result does not meet the verification condition, it is determined that the second verification result is that the measurement ability of the tab dimensions is abnormal.

[0335] In one embodiment, the first acquisition module 1801 is specifically configured to, if the verification method is a stability verification method, measure the tab pitch of the second standard part on the conveying roller through a measuring device at a preset verification moment to obtain a third measurement value, and use the third measurement value as the target measurement value; the gray level of the second standard part is the same as that of the tab pole piece.

[0336] In one embodiment, the first determination module 1802 includes:

[0337] A fifth determination unit, configured to determine a first difference between a third actual length of the tab pitch on the second standard part and a third measurement value; the target reference value includes the third actual length.

[0338] A sixth determination unit, configured to determine a calibration index value of the measuring device according to the first difference.

[0339] In one embodiment, the sixth determination unit is specifically configured to use the first difference as the calibration index value of the measuring device.

[0340] In one embodiment, the first calibration unit is specifically configured to, if the first comparison result is that the first difference is less than or equal to a first preset multiple of the tab pitch tolerance, determine that the first calibration result is that the measuring ability of the tab and tab length is normal;

[0341] If the first comparison result is that the first difference is greater than the first preset multiple of the tab pitch tolerance, determine that the first calibration result is that the measuring ability of the tab and tab length is abnormal.

[0342] In one embodiment, the apparatus further includes:

[0343] A fourth acquisition module, configured to measure the length of the tab on the second standard part in the target direction by using a measuring device, to obtain a fourth measurement value of the tab in the target direction; the target direction includes a first direction in which the maximum length of the second standard part is located and / or a second direction perpendicular to the first direction;

[0344] A fifth acquisition module, configured to acquire a second difference between a fourth actual length and a fourth measurement value of the tab on the second standard part in the same direction.

[0345] A third calibration module, configured to calibrate the measuring ability of the measuring device for the tab size according to the second difference corresponding to the tab on the second standard part in the same direction and the tab length tolerance, to obtain a second calibration result of the measuring device.

[0346] In one embodiment, the third calibration module includes:

[0347] A third comparison unit, configured to compare the second difference corresponding to the tab on the second standard part in the same direction with a second preset multiple of the tab length tolerance, to obtain a third comparison result;

[0348] A third calibration unit, configured to calibrate the measuring ability of the measuring device for the tab size according to the third comparison result, to obtain a second calibration result of the measuring device.

[0349] In one embodiment, the third verification unit is specifically configured to determine that the measurement ability of the tab size is normal if the third comparison result shows that the second difference is less than or equal to the tab length tolerance of the second preset multiple; and determine that the measurement ability of the tab size is abnormal if the third comparison result shows that the second difference is greater than the tab length tolerance of the second preset multiple.

[0350] Each module in the above measurement device verification device of the battery can be implemented in whole or in part by software, hardware, and their combination. The above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above respective modules.

[0351] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the technical solutions in the embodiments of the above battery measurement device verification method of the present application are implemented. The implementation principle and technical effects are similar and will not be elaborated here.

[0352] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, the technical solutions in the embodiments of the above battery measurement device verification method of the present application are implemented. The implementation principle and technical effects are similar and will not be elaborated here.

[0353] In one embodiment, a computer program product is provided, including a computer program. When the computer program is executed by the processor, the technical solutions in the embodiments of the above battery measurement device verification method of the present application are implemented. The implementation principle and technical effects are similar and will not be elaborated here.

[0354] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties.

[0355] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., and are not limited thereto.

[0356] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0357] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A method for calibrating a measurement device of a battery, characterized in that, The method includes: Obtaining a target measurement value obtained by the measurement device for measuring the target tab spacing; Determining a calibration index value of the measurement device according to the target measurement value and a target reference value; Calibrating the measurement ability of the measurement device for the target length according to the tab spacing tolerance and the calibration index value to obtain a first calibration result of the measurement device; the target length is the length of the tab pole piece used to produce a single battery cell, and the tab spacing tolerance is determined based on a preset total length tolerance corresponding to the target length and the total number of tab spacings on the tab pole piece of the target length.

2. The method according to claim 1, characterized in that, The tab spacing tolerance is determined based on the ratio of the preset total length tolerance to the square root of the total number.

3. The method according to claim 2, characterized in that, The tab spacing tolerance is equal to the ratio.

4. The method according to claim 1, characterized in that, The step of calibrating the measurement ability of the measurement device for the target length according to the tab spacing tolerance and the calibration index value to obtain a first calibration result of the measurement device includes: Comparing the calibration index value corresponding to the calibration method with the tab spacing tolerance of a first preset multiple to obtain a first comparison result; Calibrating the measurement ability of the measurement device for the target length according to the first comparison result to obtain a first calibration result of the measurement device.

5. The method according to claim 4, characterized in that, The step of obtaining a target measurement value obtained by the measurement device for measuring the target tab spacing includes: If the calibration method is an offline calibration method, using a preset-length tab pole piece that the measurement device has measured the tab spacing of as a sample tab pole piece; Using the measurement value obtained by the measurement device for measuring the tab spacing on the sample tab pole piece as the target measurement value; the preset length is less than the target length.

6. The method according to claim 5, characterized in that, The method further includes: Measuring the tab spacing on the sample tab pole piece on the measurement table by an image measuring instrument to obtain a target reference value corresponding to the offline calibration method; one end of the sample tab pole piece is suspended with a weight, and the gravity of the weight is consistent with the tension of the production machine of the tab die-cutting machine.

7. The method according to claim 5, characterized in that, The step of determining a calibration index value of the measurement device according to the target measurement value and a target reference value includes: Determining a measurement difference between the target reference value corresponding to the offline calibration method and the target measurement value; Determining a calibration index value of the measurement device according to the measurement difference.

8. The method according to claim 7, characterized in that, The step of determining a calibration index value of the measurement device according to the measurement difference includes: Using the measurement difference as the calibration index value of the measurement device.

9. The method according to claim 7 or 8, characterized in that, The step of calibrating the measurement ability of the measurement device for the target length according to the first comparison result to obtain a first calibration result of the measurement device includes: If the first comparison result is that the measurement difference is less than or equal to the tab spacing tolerance of the first preset multiple, determining that the first calibration result is that the measurement ability of the length of the tab pole piece is normal; If the first comparison result is that the measurement difference is greater than the tab spacing tolerance of the first preset multiple, determining that the first calibration result is that the measurement ability of the length of the tab pole piece is abnormal.

10. The method according to claim 4, characterized in that, The step of obtaining a target measurement value obtained by the measurement device for measuring the target tab spacing includes: If the calibration method is an online calibration method, the measuring device measures the tab spacings of multiple dimensions on the first standard part to obtain first measurement values corresponding to the tab spacings of each dimension. Among them, the target measurement values include the first measurement values corresponding to the tab spacings of each dimension. The first standard part is a standard part arranged between the first pole piece material and the second pole piece material. The first pole piece material and the second pole piece material are materials on the workbench of the tab die-cutting machine during the operation of the tab die-cutting machine. The gray level of the first standard part is consistent with that of the tab pole piece.

11. The method according to claim 10, characterized in that, The determining the calibration index value of the measuring device according to the target measurement value and the target reference value includes: Determining the deviation result between the first actual length of the tab spacings of each dimension on the first standard part and the corresponding first measurement value; the target reference value includes the first actual length of the tab spacings of each dimension on the first standard part. Determining the calibration index value of the measuring device according to the first deviation results corresponding to the tab spacings of each on the first standard part.

12. The method according to claim 11, characterized in that, The determining the calibration index value of the measuring device according to the first deviation results corresponding to the tab spacings of each on the first standard part includes: Fitting the first deviation results corresponding to the tab spacings of each on the first standard part to obtain a first linearity. Taking the first deviation results corresponding to the tab spacings of each on the first standard part and the first linearity as the calibration index value.

13. According to the method of claim 12, wherein The calibrating the measuring ability of the measuring device for the target length according to the first comparison result to obtain the first calibration result of the measuring device includes: If the first comparison result meets the first calibration condition, determining that the first calibration result is that the measuring ability of the length of the tab pole piece is normal; the first calibration condition is that the first linearity is less than or equal to the first preset multiple of the tab spacing tolerance, and each of the first deviation results is less than or equal to the first preset multiple of the tab spacing tolerance. If the first comparison result does not meet the first calibration condition, determining that the first calibration result is that the measuring ability of the length of the tab pole piece is abnormal.

14. According to the method of claim 10, wherein The method further includes: Measuring the lengths of the tabs of each dimension on the first standard part in the target direction by the measuring device to obtain second measurement values of the lengths of the tabs of each dimension in the target direction; the target direction includes the first direction where the maximum length of the first standard part is located and / or the second direction perpendicular to the first direction. Obtaining the second deviation results between the second actual lengths and the second measurement values of the tabs of each dimension on the first standard part in the same direction. Calibrating the measuring ability of the measuring device for the tab dimensions according to the second deviation results corresponding to the tabs of each dimension in the same direction and the tab length tolerance to obtain the second calibration result of the measuring device.

15. According to the method of claim 14, wherein The calibrating the measuring ability of the measuring device for the tab dimensions according to the second deviation results corresponding to the tabs of each dimension in the same direction and the tab length tolerance to obtain the second calibration result of the measuring device includes: Fitting the second deviation results corresponding to the same direction to obtain a second linearity. Compare the second linearity with the tab length tolerance of the second preset multiple, and compare each of the second bias results with the tab length tolerance of the second preset multiple to obtain a second comparison result; According to the second comparison result, verify the measurement ability of the measuring device for the tab size to obtain the second verification result.

16. According to the method of claim 15, wherein The verifying the measurement ability of the measuring device for the tab size according to the second comparison result to obtain the second verification result includes: If the second comparison result meets the second verification condition, it is determined that the second verification result is that the measurement ability of the tab size is normal; the second verification condition is that the second linearity is less than or equal to the preset tolerance of the second preset multiple, and each of the second bias results is less than or equal to the preset tolerance of the second preset multiple; If the second comparison result does not meet the verification condition, it is determined that the second verification result is that the measurement ability of the tab size is abnormal.

17. According to the method of claim 4, wherein The obtaining the target measurement value measured by the measuring device for the target tab spacing includes: If the verification method is a stability verification method, measure the tab spacing of the second standard part on the conveying roller by the measuring device at a preset verification moment to obtain a third measurement value, and use the third measurement value as the target measurement value; the gray level of the second standard part is the same as that of the tab and the tab plate.

18. According to the method of claim 17, wherein The determining the verification index value of the measuring device according to the target measurement value and the target reference value includes: Determine the first difference between the third actual length of the tab spacing on the second standard part and the third measurement value; the target reference value includes the third actual length; Determine the verification index value of the measuring device according to the first difference.

19. According to the method of claim 18, wherein The determining the verification index value of the measuring device according to the first difference includes: Use the first difference as the verification index value of the measuring device.

20. According to the method of claim 19, wherein The verifying the measurement ability of the measuring device for the target length according to the first comparison result to obtain the first verification result of the measuring device includes: If the first comparison result is that the first difference is less than or equal to the tab spacing tolerance of the first preset multiple, it is determined that the first verification result is that the measurement ability of the length of the tab and the tab plate is normal; If the first comparison result is that the first difference is greater than the tab spacing tolerance of the first preset multiple, it is determined that the first verification result is that the measurement ability of the length of the tab and the tab plate is abnormal.

21. According to the method of claim 17, wherein The method further includes: Measure the length of the tab on the second standard part in the target direction by the measuring device to obtain a fourth measurement value of the tab in the target direction; the target direction includes the first direction where the maximum length of the second standard part is located and / or the second direction perpendicular to the first direction; Obtain the second difference between the fourth actual length of the tab on the second standard part in the same direction and the fourth measurement value; Verify the measurement ability of the measuring device for the tab size according to the second difference corresponding to the tab on the second standard part in the same direction and the tab length tolerance to obtain the second verification result of the measuring device.

22. The method according to claim 21, wherein, Verifying the measurement ability of the measuring device for the tab size according to the second difference corresponding to the tabs on the second standard part in the same direction and the tab length tolerance, and obtaining the second verification result of the measuring device, including: Comparing the second difference corresponding to the tabs on the second standard part in the same direction with the second preset multiple of the tab length tolerance to obtain a third comparison result; Verifying the measurement ability of the measuring device for the tab size according to the third comparison result to obtain the second verification result of the measuring device.

23. The method according to claim 22, wherein, The verifying the measurement ability of the measuring device for the tab size according to the third comparison result and obtaining the second verification result of the measuring device includes: If the third comparison result is that the second difference is less than or equal to the second preset multiple of the tab length tolerance, determining that the second verification result is that the measurement ability of the tab size is normal; If the third comparison result is that the second difference is greater than the second preset multiple of the tab length tolerance, determining that the second verification result is that the measurement ability of the tab size is abnormal.

24. A calibration device for a measurement device of a battery, wherein, The device includes: A first acquisition module, configured to acquire a target measurement value obtained by the measuring device for measuring a target tab spacing; A first determination module, configured to determine a verification index value of the measuring device according to the target measurement value and a target reference value; A first verification module, configured to verify the measurement ability of the measuring device for a target length according to the tab spacing tolerance and the verification index value, and obtain a first verification result of the measuring device; the target length is the length of the tab electrode used to produce a battery cell, and the tab spacing tolerance is determined based on the preset total length tolerance corresponding to the target length and the total number of tab spacings on the tab electrode with the target length.

25. A computer device, comprising a memory and a processor, the memory storing a computer program, wherein, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 23 are implemented.

26. A computer-readable storage medium, having a computer program stored thereon, wherein, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 23 are implemented.

27. A computer program product, comprising a computer program, wherein, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 23 are implemented.

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