Pole piece detection method, detection device, detection equipment and storage medium

Abstract

The invention provides a pole piece detection method, a detection device, detection equipment and a storage medium. The pole piece detection method comprises the following steps: acquiring first detection data corresponding to a composite coating on a pole piece irradiated by a first light beam and second detection data corresponding to the composite coating irradiated by a second light beam; based on the first detection data and the second detection data, determining the proportion of a target component in the composite coating; determining the surface density of the composite coating based on the second detection data; determining the surface density of the target component based on the proportion of the target component and the surface density of the composite coating; the correlation coefficient between the absorption coefficient of the first light beam and the atomic number is larger than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number. Based on the mode, the surface density of the target component in the composite coating can be determined.

Description

Technical Field

[0001] The present application relates to the field of detection technology, and in particular to a pole piece detection method, a detection device, a detection equipment and a storage medium. Background Art

[0002] Battery pole pieces made of new composite coatings (such as SiC, silicon and graphite) can significantly improve the cycle life and rate performance of battery negative electrode materials while increasing the energy density, making the battery have better electrochemical performance. Among them, silicon has a greater impact on pole piece related performance than graphite, so controlling the silicon content in the composite coating is an extremely important part in battery preparation.

[0003] However, when using beta rays to inspect the electrode based on a transmission detection scheme, it is impossible to independently identify the proportion of the composite coating or each component in the composite coating. Only the total surface density of the electrode including the composite coating and the base layer can be detected and determined. For example, it is impossible to separately determine the surface density of the target component (such as silicon) in the coating. Summary of the Invention

[0004] The main technical problem solved by this application is to provide a pole piece detection method, a detection device, a detection equipment and a storage medium, which can determine the surface density of the target component in the composite coating.

[0005] In a first aspect, the present application provides a pole piece detection method, comprising: obtaining first detection data corresponding to a composite coating on a pole piece irradiated by a first light beam, and second detection data corresponding to a composite coating irradiated by a second light beam; determining the proportion of a target component in the composite coating based on the first detection data and the second detection data; determining the surface density of the composite coating based on the second detection data; determining the surface density of the target component based on the proportion of the target component and the surface density of the composite coating; wherein the correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number.

[0006] In the technical solution of the embodiment of the present application, a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number can be selected. This can make the first detection data more affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to the total surface density detection of the composite coating with components with at least two atomic numbers. On the basis of the above, a more accurate proportion of the target component can be determined based on the first detection data and the second detection data, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0007] In some embodiments, the first detection data includes a first initial light intensity and a first transmitted light intensity, and the second detection data includes a second initial light intensity and a second transmitted light intensity; the first initial light intensity is the light intensity of the first light beam, the first transmitted light intensity is the light intensity of the transmitted light beam generated by the first light beam irradiating the composite coating, the second initial light intensity is the light intensity of the second light beam, and the second transmitted light intensity is the light intensity of the transmitted light beam generated by the second light beam irradiating the composite coating; based on the first detection data and the second detection data, determining the proportion of the target component in the composite coating includes: determining the proportion of the target component in the composite coating based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity and the second transmitted light intensity.

[0008] In the technical solution of the embodiment of the present application, a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number can be selected. This can make the first detection data more affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to detecting the total surface density of the composite coating having components with at least two atomic numbers. On the above basis, the light intensity before the first light beam passes through the composite coating can be obtained, recorded as the first initial light intensity, and the light after the first light beam passes through the composite coating can be obtained, recorded as the first transmitted light intensity. Similarly, the light intensity before the second light beam passes through the composite coating can be obtained, recorded as the second initial light intensity, and the light after the second light beam passes through the composite coating can be obtained, recorded as the second transmitted light intensity. Subsequently, a more accurate proportion of the target component can be determined based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity. Then, the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0009] In some embodiments, based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity and the second transmitted light intensity, the proportion of the target component in the composite coating is determined, including: obtaining the proportion of the target component based on the sum of the first value and the first constant; wherein the first value is the product obtained by multiplying the second constant by the target fraction, the numerator of the target fraction is the difference obtained by subtracting the natural logarithm of the first transmitted light intensity from the natural logarithm of the first initial light intensity, and the denominator of the target fraction is the difference obtained by subtracting the natural logarithm of the second transmitted light intensity from the natural logarithm of the second initial light intensity.

[0010] In the technical solution of the embodiment of the present application, by making the first value the product obtained by multiplying the second constant by the target fraction, the numerator of the target fraction is the difference obtained by subtracting the natural logarithm of the first transmitted light intensity from the natural logarithm of the first initial light intensity, and the denominator of the target fraction is the difference obtained by subtracting the natural logarithm of the second initial light intensity from the natural logarithm of the second transmitted light intensity, the relationship between the variables in the formula corresponding to the proportion of the target component can be constructed, and then based on the formula of the sum of the first value and the first constant, the proportion of the target component can be obtained.

[0011] In some embodiments, before obtaining the proportion of the target component based on the sum of the first value and the first constant, determining the proportion of the target component in the composite coating based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity and the second transmitted light intensity, also includes: obtaining first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam, and second base layer detection data corresponding to the base layer irradiated by the second light beam; obtaining first pole piece detection data corresponding to the base layer and the composite coating of the pole piece irradiated by the first light beam, and second pole piece detection data corresponding to the base layer and the composite coating irradiated by the second light beam; determining the first constant and the second constant based on the first base layer detection data, the second base layer detection data, the first pole piece detection data and the second pole piece detection data.

[0012] In the technical solution of the embodiment of the present application, the first base layer detection data and the second base layer detection data are obtained before the composite coating is coated on the base layer of the electrode piece, and the first electrode piece detection data and the second electrode piece detection data are obtained after the composite coating is coated on the base layer of the electrode piece to form the electrode piece. Based on the first base layer detection data and the second base layer detection data corresponding to the base layer, and the first electrode piece detection data and the second electrode piece detection data corresponding to the electrode piece, the constants in the formula corresponding to the proportion of the above-mentioned target component can be determined to realize the construction of the formula, and then the proportion of the target component is determined by the formula, and then the surface density of the corresponding target component is determined.

[0013] In some embodiments, obtaining first electrode detection data corresponding to the base layer and composite coating of the electrode irradiated by the first light beam, and second electrode detection data corresponding to the base layer and composite coating irradiated by the second light beam, includes: for electrodes of at least two target components with preset proportions, respectively performing the steps of obtaining first electrode detection data corresponding to the base layer and composite coating of the electrode irradiated by the first light beam, and second electrode detection data corresponding to the base layer and composite coating irradiated by the second light beam, to obtain electrode detection data sets corresponding to at least two preset proportions; wherein the electrode detection data sets include first electrode detection data and second electrode detection data; determining a first constant and a second constant based on the first base layer detection data, the second base layer detection data, the first electrode detection data and the second electrode detection data, includes: determining the first constant and the second constant based on the first base layer detection data, the second base layer detection data and the electrode detection data sets corresponding to at least two preset proportions.

[0014] In the technical solution of the embodiment of the present application, by forming electrodes of at least two target components with preset proportions, and then obtaining electrodes of the target components with each preset proportion, the corresponding first electrode detection data and second electrode detection data are obtained. Based on the first electrode detection data and second electrode detection data of the at least two combinations, in combination with the first base layer detection data and the second base layer detection data, the above-mentioned target scores corresponding to different preset proportions can be determined, and then the constants in the formula corresponding to the proportion of the above-mentioned target components can be determined to realize the construction of the formula, and then the proportion of the target component is determined through the formula, and then the surface density of the corresponding target component is determined.

[0015] In some embodiments, the first base layer detection data includes the first base layer initial light intensity and the first base layer transmitted light intensity, the second base layer detection data includes the second base layer initial light intensity and the second base layer transmitted light intensity; the first pole piece detection data includes the first pole piece initial light intensity and the first pole piece transmitted light intensity, the second pole piece detection data includes the second pole piece initial light intensity and the second pole piece transmitted light intensity; based on the first base layer detection data, the second base layer detection data and the pole piece detection data sets corresponding to at least two preset proportions, determining the first constant and the second constant, including: obtaining the target score corresponding to each pole piece detection data set respectively; wherein the target score is the quotient obtained by dividing the second value by the third value, and the first constant is determined based on the first base layer detection data, the second base layer detection data and the pole piece detection data sets corresponding to at least two preset proportions. The second value is the difference obtained by subtracting the fifth value from the fourth value, the third value is the value obtained by subtracting the seventh value from the sixth value, the fourth value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the first pole piece from the natural logarithm of the transmitted light intensity of the first pole piece, the fifth value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the first base layer from the natural logarithm of the transmitted light intensity of the first base layer, the sixth value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the second pole piece from the natural logarithm of the transmitted light intensity of the second pole piece, and the seventh value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the second base layer from the natural logarithm of the transmitted light intensity of the second base layer; based on at least two groups of preset proportions and the target scores corresponding to each preset proportion, the first constant and the second constant are determined.

[0016] In the technical solution of the embodiment of the present application, by forming electrodes of at least two target components with preset proportions, and then obtaining electrodes of the target components with each preset proportion, the corresponding first electrode detection data and second electrode detection data are obtained, and based on the first electrode detection data and second electrode detection data of the at least two combinations, the first base layer detection data and second base layer detection data are coordinated, that is, based on the various light intensities contained in the detection data, the above-mentioned target scores corresponding to different preset proportions are determined, and then the various constants in the formula corresponding to the proportions of the above-mentioned target components are determined to realize the construction of the formula, and then the proportions of the target components are determined through the formula, and then the surface density of the corresponding target components is determined.

[0017] In some embodiments, based on at least two groups of preset proportions and the target scores corresponding to each preset proportion, the first constant and the second constant are determined, including: based on at least two groups of preset proportions and the target scores corresponding to each preset proportion, with the preset proportions as the horizontal axis value and the target scores as the vertical axis value, linear fitting is performed to obtain a corresponding linear formula; the first constant is determined based on the intercept of the linear formula, and the second constant is determined based on the slope of the linear formula.

[0018] In the technical solution of the embodiment of the present application, by forming electrodes of at least two target components with preset proportions, and then obtaining electrodes of the target components with each preset proportion, the corresponding first electrode detection data and second electrode detection data are obtained, and the first electrode detection data and second electrode detection data of the at least two combinations are combined with the first base layer detection data and the second base layer detection data, that is, based on the various light intensities contained in the detection data, the above-mentioned target scores corresponding to different preset proportions are determined, and linear fitting is performed according to the target scores corresponding to each preset proportion to determine the corresponding linear formula, and then the above-mentioned constants are determined based on the linear formula, and then the proportion of the target component is determined by the linear formula, and then the surface density of the corresponding target component is determined.

[0019] In some embodiments, obtaining first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam, and second base layer detection data corresponding to the base layer irradiated by the second light beam includes: obtaining first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam based on the first detection device, and obtaining second base layer detection data corresponding to the base layer irradiated by the second light beam based on the second detection device; obtaining first pole piece detection data corresponding to the base layer and composite coating of the pole piece irradiated by the first light beam, and second pole piece detection data corresponding to the base layer and composite coating irradiated by the second light beam includes: obtaining first pole piece detection data corresponding to the base layer and composite coating of the pole piece irradiated by the first light beam based on the third detection device, and obtaining second pole piece detection data corresponding to the base layer and composite coating irradiated by the second light beam based on the fourth detection device.

[0020] In the technical solution of the embodiment of the present application, by forming electrodes of at least two target components with preset proportions, and then obtaining the electrode of the target components with each preset proportion based on each detection device, the corresponding first electrode detection data and second electrode detection data, based on the at least two combinations of the first electrode detection data and the second electrode detection data, in conjunction with the first base layer detection data and the second base layer detection data respectively obtained by each detection device, the above-mentioned target scores corresponding to different preset proportions can be determined, and then the constants in the formula corresponding to the proportion of the above-mentioned target components can be determined to realize the construction of the formula, and then the proportion of the target component is determined through the formula, and then the surface density of the corresponding target component is determined.

[0021] In some embodiments, the pole piece detection method also includes: based on the first detection device, determining the first absorption coefficient of the first preset piece with a surface density of the first preset surface density; based on the third detection device, determining the second absorption coefficient of the first preset piece; based on the quotient obtained by dividing the second absorption coefficient by the first absorption coefficient, determining the first correction coefficient, and multiplying the initial value of the first base layer detection data by the first correction coefficient to obtain the correction value of the first base layer detection data, so as to determine the first constant and the second constant based on the correction value of the first base layer detection data; and / or, based on the second detection device, determining the third absorption coefficient of the second preset piece with a surface density of the second preset surface density; based on the fourth detection device, determining the fourth absorption coefficient of the second preset piece; based on the quotient obtained by dividing the fourth absorption coefficient by the third absorption coefficient, determining the second correction coefficient, and multiplying the initial value of the second base layer detection data by the second correction coefficient to obtain the correction value of the second base layer detection data, so as to determine the first constant and the second constant based on the correction value of the second base layer detection data.

[0022] In the technical solution of the embodiment of the present application, before using different detection devices to respectively emit the same type of light beams to acquire corresponding detection data, each detection device is first used to respectively acquire detection data for a first preset piece with a known surface density of the first preset surface density, and then based on the detection data corresponding to the first preset piece acquired by different detection devices that emit the same type of light beams, corresponding processing is performed to obtain a correction coefficient. Subsequently, the correction value of the corresponding detection data can be obtained based on the correction coefficient, and then the various constants are determined based on the correction value of each detection data to reduce the error caused by individual differences between different detection devices and improve the accuracy of the surface density of the target component.

[0023] In some embodiments, before determining the surface density of the composite coating based on the second detection data, the pole piece detection method also includes: obtaining a fifth absorption coefficient corresponding to a third preset piece whose surface density irradiated by the second light beam is a third preset surface density; determining the surface density of the composite coating based on the second detection data, including: determining the surface density of the composite coating based on the second detection data and the fifth absorption coefficient.

[0024] In the technical solution of the embodiment of the present application, before using the second light beam to determine the surface density of the composite coating, the second light beam is first used to irradiate a third preset piece whose surface density is known to be a third preset surface density to obtain detection data, and then the fifth absorption coefficient corresponding to the second light beam is determined by the detection data and the third preset surface density. Subsequently, the surface density of the composite coating can be determined based on the fifth absorption coefficient and the second detection data.

[0025] In some embodiments, obtaining first detection data corresponding to the composite coating on the pole piece irradiated by the first light beam, and second detection data corresponding to the composite coating irradiated by the second light beam include: obtaining first pole piece detection data corresponding to the base layer and the composite coating on the pole piece irradiated by the first light beam, first base layer detection data corresponding to the base layer on the pole piece irradiated by the first light beam, second pole piece detection data corresponding to the base layer and the composite coating on the pole piece irradiated by the second light beam, and second base layer detection data corresponding to the base layer on the pole piece irradiated by the second light beam; determining the first detection data based on the difference obtained by subtracting the first base layer detection data from the first pole piece detection data, and determining the second detection data based on the difference obtained by subtracting the second base layer detection data from the second pole piece detection data.

[0026] In the technical solution of the embodiment of the present application, the detection data corresponding to the composite coating alone can be determined by obtaining the difference between the detection data corresponding to the base layer and the electrode having the base layer and the composite coating, thereby realizing the determination of the detection data corresponding to the composite coating based on the electrode detection data and the base layer detection data, and then determining the surface density of the target component in the composite coating based on the first detection data and the second detection data corresponding to the composite coating respectively.

[0027] In some embodiments, the first beam is an X-ray, and / or the second beam is a beta ray, and / or the target component is silicon, and / or the composite coating includes silicon and graphite.

[0028] In the technical solution of the embodiment of the present application, X-rays with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and beta rays with a relatively small correlation coefficient between the absorption coefficient and the atomic number can be selected, so that the first detection data is greatly affected by the atomic number, which is conducive to determining the proportion of silicon with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to the total surface density detection of the composite coating with components of at least two atomic numbers. On the basis of the above, a more accurate proportion of silicon can be determined based on the first detection data and the second detection data, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of silicon and the surface density of the composite coating, the surface density of silicon can be determined.

[0029] In the second aspect, the present application provides a detection device, including: an acquisition unit, used to acquire first detection data corresponding to the composite coating on the pole piece irradiated by the first light beam, and second detection data corresponding to the composite coating irradiated by the second light beam; a processing unit, used to: determine the proportion of the target component in the composite coating based on the first detection data and the second detection data; determine the surface density of the composite coating based on the second detection data; determine the surface density of the target component based on the proportion of the target component and the surface density of the composite coating; wherein the correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number.

[0030] In a third aspect, the present application provides a detection device, comprising: a memory and a processor; the memory is used to store program instructions, and the processor is used to execute the program instructions to implement the above method.

[0031] In a fourth aspect, the present application provides a computer-readable storage medium, which stores program instructions, and the program instructions implement the above method when executed by a processor.

[0032] It can be understood that the beneficial effects of the second aspect mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0033] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 A schematic flow chart of one or more embodiments of the pole piece detection method provided in this application; Figure 2 One of the schematic diagrams of one or more embodiments of light beam transmission detection provided by the present application; Figure 3 This is a second schematic diagram of one or more embodiments of light beam transmission detection provided by the present application; Figure 4 This is a third schematic diagram of one or more embodiments of light beam transmission detection provided by the present application; Figure 5A schematic diagram of one or more embodiments of the target component ratio formula provided in this application; Figure 6 A schematic structural diagram of one or more embodiments of the first device, coating device, and second device provided in this application; Figure 7 A schematic structural diagram of one or more embodiments of the first device, the second device, and the electrode provided in this application; Figure 8 A schematic diagram of the structure of one or more embodiments of the detection device provided in this application; Figure 9 A schematic structural diagram of one or more embodiments of the electronic device provided in this application; Figure 10 A schematic diagram of the structure of one or more embodiments of the computer-readable storage medium provided in this application. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art 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-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of this application, the technical terms "first," "second," etc. are used only to distinguish different objects and should not be understood to indicate or imply relative importance or to implicitly indicate the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0039] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0041] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0043] Battery pole pieces made of new composite coatings (such as SiC, silicon and graphite) can significantly improve the cycle life and rate performance of battery negative electrode materials while increasing the energy density, making the battery have more excellent electrochemical properties and better meet the application requirements of lithium-ion batteries in high energy density, long cycle life and high-rate charge and discharge. Among them, silicon has a greater impact on pole piece related performance (bulk expansion, conductivity, first efficiency) than graphite, so controlling the silicon content in the composite coating is an extremely important part in battery preparation.

[0044] However, when using β-rays to detect the electrode based on a transmission detection scheme, since the absorption coefficient of β-rays does not change much or remains unchanged when detecting the surface density of materials with different atomic numbers, the β-rays can more accurately detect the overall surface density of the electrode or the composite coating on the electrode, but cannot independently identify the proportion of the composite coating or each component in the composite coating. It can only detect and determine the total surface density of the electrode including the composite coating and the base layer. For example, it is impossible to separately determine the surface density of the target component (such as silicon) in the coating.

[0045] Based on the above considerations, the present application provides a method and system for detecting the state of a battery cell. The electrode detection method includes: obtaining first detection data corresponding to the composite coating on the electrode irradiated by the first light beam, and second detection data corresponding to the composite coating irradiated by the second light beam; determining the proportion of the target component in the composite coating based on the first detection data and the second detection data; determining the surface density of the composite coating based on the second detection data; determining the surface density of the target component based on the proportion of the target component and the surface density of the composite coating; the correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number. Based on the above method, the surface density of the target component in the composite coating can be determined.

[0046] According to some embodiments of this application, please refer to Figure 1 , Figure 1 A schematic flow chart of one or more embodiments of the pole piece detection method provided in this application.

[0047] The pole piece detection method includes: Step S101: Acquire first detection data corresponding to the composite coating on the pole piece irradiated by the first light beam, and second detection data corresponding to the composite coating irradiated by the second light beam.

[0048] The correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number.

[0049] In one example, the first light beam can be a light beam with a large correlation coefficient between the absorption coefficient and the atomic number, that is, a light beam whose absorption coefficient is greatly affected by the change in the atomic number of the material to be transmitted, such as X-rays. The larger the atomic number of the atom, the stronger its ability to absorb X-rays, that is, the higher the degree of attenuation of X-rays after passing through atoms with larger atomic numbers.

[0050] The first light beam may be a light beam having a smaller correlation coefficient between the absorption coefficient and the atomic number, that is, a light beam having an absorption coefficient that is less affected or even unaffected by changes in the atomic number of the material to be transmitted, such as a β ray.

[0051] The first detection data may specifically include light intensity data of the first light beam before and after it passes through the composite coating, and the second detection data may specifically include light intensity data of the second light beam before and after it passes through the composite coating.

[0052] Step S102: Determine the proportion of the target component in the composite coating based on the first detection data and the second detection data.

[0053] Among them, since the first detection data is determined by the comprehensive absorption coefficient corresponding to the content combination of each atomic number component in the composite coating, the proportion of the target component in the composite coating can be determined by analyzing and processing the first detection data and the second detection data.

[0054] In one example, the composite coating may be composed of silicon and graphite, the atomic number of silicon is 14, and the atomic number of graphite is 6, and the proportion of silicon in the composite coating may be determined through the first detection data.

[0055] It should be noted that, in practice, the composite coating is a pole piece formed by coating on a base layer. The base layer may be composed of copper, and the atomic number of copper is 64. The detection data corresponding to the corresponding light beam irradiating the base layer and irradiating the base layer plus the composite coating can be obtained by performing corresponding processing to obtain the detection data of the corresponding light beam irradiating the composite coating, such as the first detection data and the second detection data.

[0056] Step S103: determining the surface density of the composite coating based on the second detection data.

[0057] Among them, since the second detection data is less or not affected by the atomic number of each component in the composite coating, but is more or only affected by the surface density of the composite coating, the surface density of the composite coating can be obtained more accurately and quickly through the second detection data.

[0058] Step S104: determining the areal density of the target component based on the proportion of the target component and the areal density of the composite coating.

[0059] The proportion of the target component can be multiplied by the surface density of the composite coating to obtain a corresponding product value, which is recorded as the surface density of the target component.

[0060] Based on the above method, first, by taking advantage of the characteristic that the absorption coefficient of the first light beam is greatly affected by the atomic number of the material in the composite coating, combined with the first detection data obtained by the first light beam passing through the composite coating and the second detection data obtained by the second light beam passing through the composite coating, a more accurate proportion of the target component can be determined.

[0061] Secondly, by virtue of the fact that the absorption coefficient of the second light beam is slightly or even unaffected by the atomic number of the material in the composite coating, a relatively accurate surface density of the composite coating can be determined based on the second detection data.

[0062] Finally, by multiplying the proportion of the target component by the surface density of the composite coating, a more accurate surface density of the target component can be obtained, which solves the technical problem in the existing technology that it is difficult to accurately determine the proportion or surface density of the target component in the composite coating. It realizes the determination of the surface density of the target component based on the transmission and detection of two light beams with different characteristics, thereby improving the reliability of the pole piece detection method.

[0063] In one example, the first beam is an X-ray, and / or the second beam is a beta ray, and / or the target component is silicon, and / or the composite coating includes silicon and graphite.

[0064] The present application selects a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number, so that the first detection data is greatly affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to the total surface density detection of the composite coating with components of at least two atomic numbers. On the basis of the above, a more accurate proportion of the target component can be determined based on the first detection data and the second detection data, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0065] According to some embodiments of the present application, the first detection data includes a first initial light intensity and a first transmitted light intensity, and the second detection data includes a second initial light intensity and a second transmitted light intensity.

[0066] The first initial light intensity is the intensity of the first light beam, the first transmitted light intensity is the intensity of the transmitted light beam generated by the first light beam irradiating the composite coating, the second initial light intensity is the intensity of the second light beam, and the second transmitted light intensity is the intensity of the transmitted light beam generated by the second light beam irradiating the composite coating.

[0067] Step S102 of this embodiment includes: The proportion of the target component in the composite coating is determined based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity.

[0068] Specifically, see Figure 2 , Figure 2 This is one of the schematic diagrams of one or more embodiments of the light beam transmission detection provided by the present application. In the process of using a light beam to transmit the object to be tested to obtain detection data, if the light beam is a first light beam and the object to be tested is a composite coating, the light intensity of the first light beam before transmitting the composite coating is a first initial light intensity I ox The light intensity of the first light beam after passing through the composite coating is the first transmitted light intensity I x , and if the light beam is the second light beam and the object to be measured is a composite coating, then the light intensity of the second light beam before it passes through the composite coating is the second initial light intensity I oβ The light intensity of the second light beam after passing through the composite coating is the second transmitted light intensity I β .

[0069] Since the absorption coefficient of the first light beam is highly correlated with the proportion of the components of each atomic number in the composite coating, and the absorption coefficient of the second light beam is highly correlated with the overall surface density of the composite coating, the first initial light intensity I ox With the first transmitted light intensity I x The attenuation degree between can reflect the proportion of the target component in the composite coating, and the second initial light intensity I oβ With the second transmitted light intensity I β The attenuation degree between them can reflect the overall surface density of the composite coating.

[0070] Therefore, based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity, which respectively have corresponding characteristics, the proportion of the target component in the composite coating can be effectively determined.

[0071] The present application selects a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number, so that the first detection data is greatly affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to detecting the total surface density of a composite coating with components of at least two atomic numbers. On the above basis, the light intensity before the first light beam passes through the composite coating can be obtained, recorded as the first initial light intensity, and the light after the first light beam passes through the composite coating can be obtained, recorded as the first transmitted light intensity. Similarly, the light intensity before the second light beam passes through the composite coating can be obtained, recorded as the second initial light intensity, and the light after the second light beam passes through the composite coating can be obtained, recorded as the second transmitted light intensity. Subsequently, a more accurate proportion of the target component can be determined based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0072] Optionally, in this embodiment, determining the proportion of the target component in the composite coating based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity includes: Based on the sum of the first value and the first constant, the proportion of the target component is obtained.

[0073] Among them, the first value is the product of the second constant and the target fraction, the numerator of the target fraction is the difference between the natural logarithm of the first initial light intensity and the natural logarithm of the first transmitted light intensity, and the denominator of the target fraction is the difference between the natural logarithm of the second initial light intensity and the natural logarithm of the second transmitted light intensity.

[0074] Specifically, it is assumed that the first light beam is an X-ray and the second light beam is a β-ray.

[0075] In one example, the composite coating includes silicon and graphite, and the target component is silicon. In other examples, the composition of the composite coating and the target component may also be other materials, which are not limited here.

[0076] The relationship between surface density and absorption coefficient is as follows: (1) (2) (3) is the surface density of the composite coating measured based on the first beam, is the absorption coefficient corresponding to the first light beam passing through the composite coating, is the first initial light intensity, is the first transmitted light intensity, is the areal density of the composite coating measured based on the second beam, is the absorption coefficient of the second light beam transmitted through the composite coating, is the second initial light intensity, is the second transmitted light intensity.

[0077] is the proportion of the target component (silicon), is the absorption coefficient of silicon in the composite coating for the first light beam transmission, is the absorption coefficient of the graphite in the composite coating when the first light beam passes through it.

[0078] By equating the surface density of formula (1) with the surface density of formula (2), we can deduce: (4) Substituting formula (4) into formula (3) can construct the formula for the proportion of the target component: = (5) Set constant term ,and , Equation (5) can be converted into: (6) In formula (6), B is the first constant, A is the second constant, is the numerator of the target fraction, is the denominator of the target fraction.

[0079] At this point, the ratio of the target component is constructed as shown in formula (6): It should be noted that for the sake of convenience, the target component here is the ratio of the target component of silicon. For example, in other examples, the material composition and target component of the composite coating can be other materials, which are not limited here.

[0080] The present application constructs the relationship between the variables in the formula corresponding to the proportion of the target component by making the first value the product of the second constant multiplied by the target fraction, the numerator of the target fraction the difference obtained by subtracting the natural logarithm of the first transmitted light intensity from the natural logarithm of the first initial light intensity, and the denominator of the target fraction the difference obtained by subtracting the natural logarithm of the second initial light intensity from the natural logarithm of the second transmitted light intensity. The formula based on the sum of the first value and the first constant can then be used to obtain the proportion of the target component.

[0081] Furthermore, in this embodiment, before obtaining the proportion of the target component based on the sum of the first value and the first constant, determining the proportion of the target component in the composite coating based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity further includes: Acquire first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam, and second base layer detection data corresponding to the base layer irradiated by the second light beam.

[0082] Acquire first pole piece detection data corresponding to the base layer and composite coating of the pole piece irradiated by the first light beam, and second pole piece detection data corresponding to the base layer and composite coating irradiated by the second light beam.

[0083] A first constant and a second constant are determined based on the first base layer detection data, the second base layer detection data, the first pole piece detection data, and the second pole piece detection data.

[0084] Specifically, see Figure 3 and Figure 4 , Figure 3 This is a second schematic diagram of one or more embodiments of light beam transmission detection provided by this application. Figure 4 The third schematic diagram of one or more embodiments of light beam transmission detection provided in this application, the object to be measured is a pole piece. In one example, the base layer of the pole piece is copper Cu, and the composite coating includes silicon Si and graphite C. In other examples, the base layer and the composite coating can be a combination of other materials, which is not limited here.

[0085] Before coating the composite coating on the base layer, the base layer itself can be subjected to transmission detection of the first light beam and the second light beam respectively to obtain first base layer detection data and second base layer detection data; and after coating the composite coating on the base layer to form a pole piece, the pole piece formed by the base layer and the composite coating can be subjected to transmission detection of the first light beam and the second light beam respectively to obtain first pole piece detection data and second pole piece detection data.

[0086] The present application obtains first base layer detection data and second base layer detection data before coating the composite coating on the base layer of the electrode, and then obtains first electrode piece detection data and second electrode piece detection data after coating the composite coating on the base layer of the electrode to form the electrode. Based on the first base layer detection data and second base layer detection data corresponding to the base layer, and the first electrode piece detection data and second electrode piece detection data corresponding to the electrode, the constants in the formula corresponding to the proportion of the above-mentioned target component can be determined to realize the construction of the formula, and then the proportion of the target component is determined by the formula, and then the surface density of the corresponding target component is determined.

[0087] In one example, obtaining first pole piece detection data corresponding to a first light beam irradiating a base layer and a composite coating of the pole piece, and obtaining second pole piece detection data corresponding to a second light beam irradiating the base layer and the composite coating, includes: For electrodes of at least two target components with preset proportions, the steps of acquiring first electrode detection data corresponding to the substrate and composite coating of the electrode when the first light beam is irradiated, and second electrode detection data corresponding to the substrate and composite coating when the second light beam is irradiated are respectively performed to obtain electrode detection data sets corresponding to the at least two preset proportions. The electrode detection data sets include the first electrode detection data and the second electrode detection data.

[0088] Determining a first constant and a second constant based on the first base layer detection data, the second base layer detection data, the first pole piece detection data, and the second pole piece detection data includes: The first constant and the second constant are determined based on the first base layer detection data, the second base layer detection data and at least two sets of pole piece detection data corresponding to the preset proportions.

[0089] Specifically, the electrode can be weighed in real time when applying the coating of the corresponding component to determine the proportion of the target component in the composite coating formed. Based on this method, by adjusting the coating speed corresponding to each coating, at least two electrode plates corresponding to the preset proportions can be obtained, and then the corresponding electrode detection data set can be obtained.

[0090] The first base layer detection data and the second base layer detection data can be obtained only once, and after constructing the electrode (base layer and composite coating) of the target component with at least two preset proportions, the electrode detection data set corresponding to the electrode under each preset proportion can be obtained. The electrode detection data set includes the first electrode detection data and the second electrode detection data.

[0091] Determine the target score based on the first base layer detection data and the second base layer detection data, and the first electrode detection data and the second electrode detection data under at least two preset proportions. , and determined based on each preset proportion , can determine at least two of the equations (6) Corresponding to .

[0092] Therefore, the corresponding second constant A and first constant B can be calculated by linear fitting, formula calculation or other methods.

[0093] The present application forms electrodes of target components with at least two preset proportions, and then obtains the electrode of the target components with each preset proportion, and the corresponding first electrode detection data and second electrode detection data. Based on the first electrode detection data and second electrode detection data of the at least two combinations, in combination with the first base layer detection data and the second base layer detection data, the above-mentioned target scores corresponding to different preset proportions can be determined, and then the constants in the formula corresponding to the proportion of the above-mentioned target components can be determined to realize the construction of the formula, and then the proportion of the target component is determined by the formula, and then the surface density of the corresponding target component is determined.

[0094] Furthermore, the first base layer detection data includes the first base layer initial light intensity and the first base layer transmitted light intensity, and the second base layer detection data includes the second base layer initial light intensity and the second base layer transmitted light intensity.

[0095] The first pole piece detection data includes the first pole piece initial light intensity and the first pole piece transmitted light intensity, and the second pole piece detection data includes the second pole piece initial light intensity and the second pole piece transmitted light intensity.

[0096] Determining a first constant and a second constant based on the first base layer detection data, the second base layer detection data, and at least two sets of electrode detection data corresponding to the preset proportions, including: Obtain target scores corresponding to each set of pole piece detection data. The target score is the quotient obtained by dividing the second value by the third value, the second value is the difference obtained by subtracting the fifth value from the fourth value, the third value is the value obtained by subtracting the seventh value from the sixth value, the fourth value is the difference obtained by subtracting the natural logarithm of the first pole piece's initial light intensity from the natural logarithm of the first pole piece's transmitted light intensity, the fifth value is the difference obtained by subtracting the natural logarithm of the first base layer's initial light intensity from the natural logarithm of the first base layer's transmitted light intensity, the sixth value is the difference obtained by subtracting the natural logarithm of the second pole piece's initial light intensity from the natural logarithm of the second pole piece's transmitted light intensity, and the seventh value is the difference obtained by subtracting the natural logarithm of the second base layer's initial light intensity from the natural logarithm of the second base layer's transmitted light intensity.

[0097] A first constant and a second constant are determined based on at least two groups of preset proportions and target scores corresponding to the preset proportions.

[0098] Specifically, step S101 in this embodiment may include: Obtain first pole piece detection data corresponding to the base layer and composite coating on the pole piece irradiated by the first light beam, first base layer detection data corresponding to the base layer on the pole piece irradiated by the first light beam, second pole piece detection data corresponding to the base layer and composite coating on the pole piece irradiated by the second light beam, and second base layer detection data corresponding to the base layer on the pole piece irradiated by the second light beam.

[0099] The first detection data is determined based on the difference obtained by subtracting the first base layer detection data from the first pole piece detection data, and the second detection data is determined based on the difference obtained by subtracting the second base layer detection data from the second pole piece detection data.

[0100] like Figure 3 and Figure 4 As shown, in the process of using a light beam to transmit the base layer to obtain detection data, if the light beam is the first light beam, the light intensity of the first light beam before transmitting the composite coating is the initial light intensity of the first base layer I ox1 The light intensity of the first light beam after passing through the composite coating is the first base layer transmission light intensity I x1 , and if the light beam is the second light beam, the light intensity of the second light beam before transmitting the composite coating is the initial light intensity of the second base layer I oβ1 The light intensity of the second light beam after passing through the composite coating is the second base layer transmission light intensity I β1 .

[0101] In the process of using a light beam to transmit the electrode to obtain detection data, if the light beam is the first light beam, the light intensity of the first light beam before transmitting the composite coating is the initial light intensity of the first electrode I ox2 The intensity of the first light beam after passing through the composite coating is the first pole piece transmission intensity I x2 , and if the light beam is the second light beam, the intensity of the second light beam before it passes through the composite coating is the initial light intensity of the second pole piece I oβ2 The intensity of the second light beam after passing through the composite coating is the second pole piece transmission intensity I β2 .

[0102] By subtracting the fifth value from the fourth value, that is, by subtracting the natural logarithm of the initial light intensity of the first pole piece from the natural logarithm of the transmitted light intensity of the first pole piece from the natural logarithm of the initial light intensity of the first base layer from the natural logarithm of the transmitted light intensity of the first base layer, the corresponding difference is obtained, and the difference between the natural logarithm of the first initial light intensity and the natural logarithm of the first transmitted light intensity can be determined.

[0103] By subtracting the seventh value from the sixth value, that is, by subtracting the natural logarithm of the initial light intensity of the first pole piece from the natural logarithm of the transmitted light intensity of the first pole piece from the natural logarithm of the initial light intensity of the second base layer from the natural logarithm of the transmitted light intensity of the second base layer, the corresponding difference is obtained, and the difference between the natural logarithm of the second initial light intensity and the natural logarithm of the second transmitted light intensity can be determined.

[0104] Based on the above method, we can further determine the target score corresponding to each preset proportion. , in order to obtain the constants and complete the construction of formula (6).

[0105] The present application forms electrodes of at least two target components with preset proportions, and then obtains the electrode of each target component with preset proportions, the corresponding first electrode detection data and second electrode detection data, based on the at least two combinations of the first electrode detection data and the second electrode detection data, in conjunction with the first base layer detection data and the second base layer detection data, that is, based on the various light intensities contained in the detection data, the above-mentioned target scores corresponding to different preset proportions are determined, and then the various constants in the formula corresponding to the proportions of the above-mentioned target components are determined to realize the construction of the formula, and then the proportions of the target components are determined through the formula, and then the surface density of the corresponding target components is determined.

[0106] In one example, determining the first constant and the second constant based on at least two sets of preset proportions and target scores corresponding to the preset proportions includes: Based on at least two sets of preset proportions and the target scores corresponding to each preset proportion, a linear fit is performed with the preset proportions as the horizontal axis value and the target scores as the vertical axis value to obtain a corresponding linear formula.

[0107] The first constant is determined based on the intercept of the linear formula, and the second constant is determined based on the slope of the linear formula.

[0108] Specifically, see Figure 5 , Figure 5 This is a schematic diagram of one or more embodiments of the target component ratio formula provided in this application, which can be used to determine the corresponding , and then determine the corresponding target scores according to each preset proportion , we can get at least two groups and , in the coordinate system is the horizontal axis value, As the vertical coordinate value, perform linear fitting on each point and construct Figure 5 The schematic diagram shown in FIG. 1 is used to determine the slope and intercept of the straight line formed by linear fitting in the schematic diagram, thereby obtaining the second constant A and the first constant B.

[0109] The number of the at least two groups of preset proportions may be 2, 5, 10, or any other number, which is not limited here.

[0110] The present application forms electrodes of target components with at least two preset proportions, and then obtains the electrode of the target components with each preset proportion, the corresponding first electrode detection data and second electrode detection data, based on the at least two combinations of the first electrode detection data and the second electrode detection data, in conjunction with the first base layer detection data and the second base layer detection data, that is, based on the light intensities contained in the detection data, the above-mentioned target scores corresponding to different preset proportions are determined, and linear fitting is performed according to the target scores corresponding to each preset proportion to determine the corresponding linear formula, and then the above-mentioned constants are determined based on the linear formula, and then the proportion of the target component is determined by the linear formula, and then the surface density of the corresponding target component is determined.

[0111] Furthermore, in this embodiment, obtaining first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam and second base layer detection data corresponding to the base layer irradiated by the second light beam includes: Based on the first detection device, first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam is obtained, and based on the second detection device, second base layer detection data corresponding to the base layer irradiated by the second light beam is obtained.

[0112] Acquiring first pole piece detection data corresponding to the base layer and the composite coating of the pole piece irradiated by the first light beam, and second pole piece detection data corresponding to the base layer and the composite coating irradiated by the second light beam, including: Based on the third detection device, first pole piece detection data corresponding to the base layer and composite coating of the pole piece irradiated by the first light beam is obtained, and based on the fourth detection device, second pole piece detection data corresponding to the base layer and composite coating irradiated by the second light beam is obtained.

[0113] Specifically, see Figure 6 and Figure 7 , Figure 6 This is a schematic structural diagram of one or more embodiments of the first device, coating device, and second device provided in this application. Figure 7 A schematic structural diagram of one or more embodiments of the first device, second device and pole piece provided in this application, M is the first device, used to detect the pole piece Q having only the base layer Q1, L is the coating device for coating the composite coating Q2 on the base layer Q1, and N is the second device, used to detect the pole piece Q having the base layer Q1 and the composite coating Q2.

[0114] The first device may include a first detection device and a second detection device, and the second device may include a third detection device and a fourth detection device.

[0115] like Figure 2 The detection device shown can be a first device or a second device. The first device may include a light source for emitting a first light beam and a sensor for receiving the first light beam, and a light source for emitting a second light beam and a sensor for receiving the transmitted second light beam. The second device may also include a light source for emitting the first light beam and a sensor for receiving the first light beam, and a light source for emitting the second light beam and a sensor for receiving the transmitted second light beam.

[0116] The first device and the second device respectively detect the same target position on the electrode to determine the corresponding detection data to determine the proportion of the target component at the target position. For example, the trajectory corresponding to the target position can be as follows: Figure 7 As shown in the track S in FIG, the track S may also be a track in other forms, which is not limited here.

[0117] The present application forms electrodes of target components with at least two preset proportions, and then obtains the electrode of the target components with each preset proportion based on each detection device, and the corresponding first electrode detection data and second electrode detection data. Based on the first electrode detection data and second electrode detection data of the at least two combinations, and in conjunction with the first base layer detection data and second base layer detection data respectively obtained by each detection device, the above-mentioned target scores corresponding to different preset proportions can be determined, and then the constants in the formula corresponding to the proportion of the above-mentioned target components can be determined to realize the construction of the formula, and then the proportion of the target component is determined through the formula, and then the surface density of the corresponding target component is determined.

[0118] In one example, the pole piece detection method may further include: Based on the first detection device, a first absorption coefficient of a first predetermined sheet having an area density of a first predetermined area density is determined.

[0119] Based on the third detection device, a second absorption coefficient of the first predetermined sheet is determined.

[0120] Based on the quotient obtained by dividing the second absorption coefficient by the first absorption coefficient, the first correction coefficient is determined, and the initial value of the first base layer detection data is multiplied by the first correction coefficient to obtain the corrected value of the first base layer detection data, so as to determine the first constant and the second constant based on the corrected value of the first base layer detection data.

[0121] and / or, Based on the second detection device, a third absorption coefficient of a second predetermined sheet having an area density of a second predetermined area density is determined.

[0122] Based on the fourth detection device, a fourth absorption coefficient of the second preset patch is determined.

[0123] Based on the quotient obtained by dividing the fourth absorption coefficient by the third absorption coefficient, the second correction coefficient is determined, and the initial value of the second base layer detection data is multiplied by the second correction coefficient to obtain the corrected value of the second base layer detection data, so as to determine the first constant and the second constant based on the corrected value of the second base layer detection data.

[0124] Specifically, the first preset area density and the second preset area density may be the same or different, which is not limited here.

[0125] First, as Figure 2 As shown, when the object to be measured is the first preset piece and the emitted light beam is the first light beam, the first initial light intensity corresponding to formula (1) is obtained. and the first transmitted light intensity , is the surface density corresponding to the first light beam passing through the first preset sheet, is the absorption coefficient corresponding to the first light beam passing through the first preset sheet. By making the surface density in the formula (1) determined by the first detection device and the formula (1) determined by the third detection device equal, we can obtain: (7) In formula (7), The absorption coefficient in equation (1) obtained by determining the third detection device is: The absorption coefficient in equation (1) determined for the first detection device is, is the first initial light intensity of the first light beam emitted by the third detection device, is the first transmitted light intensity of the first light beam after transmission received by the third detection device, is the first initial light intensity of the first light beam emitted by the first detection device, is the first transmitted light intensity of the first light beam after transmission received by the first detection device, is the first correction coefficient mentioned above.

[0126] Second, if Figure 2 As shown, when the object to be measured is the second preset piece and the emitted light beam is the second light beam, the second initial light intensity corresponding to formula (1) is obtained. and the second transmitted light intensity , is the surface density corresponding to the second light beam passing through the second preset sheet, is the absorption coefficient corresponding to the second light beam passing through the second preset sheet. By making the surface density in the formula (1) obtained by the second detection device and the formula (1) obtained by the fourth detection device equal, we can obtain: (8) In formula (8), The absorption coefficient in equation (1) obtained by determining the fourth detection device is, The absorption coefficient in equation (1) obtained by determining the second detection device is, is the second initial light intensity of the second light beam emitted by the fourth detection device, is the second transmitted light intensity of the second light beam after transmission received by the fourth detection device, is the second initial light intensity of the second light beam emitted by the second detection device, is the second transmitted light intensity of the second light beam after transmission received by the second detection device, is the second correction coefficient mentioned above.

[0127] The above method can be used to determine the corresponding correction coefficient to determine the difference between the same type of light beams emitted by different devices, and then the corresponding light intensity is corrected based on the difference to obtain the corresponding correction value, and then the proportion of the target component is determined, thereby improving the accuracy of the pole piece detection method.

[0128] According to some embodiments of the present application, in this embodiment, before step S103, the electrode piece detection method further includes: A fifth absorption coefficient corresponding to a third preset slice having a third preset surface density irradiated by the second light beam is obtained.

[0129] Determining the areal density of the composite coating based on the second detection data includes: An areal density of the composite coating is determined based on the second detection data and the fifth absorption coefficient.

[0130] Specifically, the second initial light intensity of the corresponding second light beam and the second transmitted light intensity after passing through the third preset sheet can be obtained by irradiating the third preset sheet with the second light beam having a surface density known as the third preset surface density. The third preset surface density, the second initial light intensity and the second transmitted light intensity are substituted into the surface density and absorption coefficient relationship shown in formula (2). Since the correlation between the absorption coefficient of the second light beam and the atomic number is low, but the correlation between the absorption coefficient and the surface density is high, the fifth absorption coefficient of the second light beam can be determined.

[0131] Subsequently, the surface density of the object to be detected (such as a composite coating or a base layer or an electrode) corresponding to the second detection data can be determined based on the fifth absorption coefficient, and the second initial light intensity and the second transmitted light intensity in the second detection data.

[0132] Before using the second light beam to determine the surface density of the composite coating, the present application first obtains detection data by using the second light beam to irradiate a third preset piece whose surface density is known to be a third preset surface density, and then determines the fifth absorption coefficient corresponding to the second light beam through the detection data and the third preset surface density. Subsequently, the surface density of the composite coating can be determined based on the fifth absorption coefficient and the second detection data.

[0133] For example, the overall process of the pole piece detection method can be shown as follows: The first correction coefficient and the second correction coefficient described in the previous embodiment can be determined first, and the first correction coefficient is used to correct the detection data in the first detection device to obtain a correction value, and the second correction coefficient is used to correct the detection data in the second detection device to obtain a correction value. The base detection data obtained for the base detection used in subsequent steps are all correction values and will not be repeated.

[0134] Assuming that the composite coating includes silicon and graphite, the target component is silicon.

[0135] In the first step, the first base layer detection data corresponding to the base layer of the pole piece irradiated by the first light beam is obtained based on the first detection device, and the second base layer detection data corresponding to the base layer irradiated by the second light beam is obtained based on the second detection device, and the surface density of the base layer is determined by weighing the base layer.

[0136] The first base layer detection data includes the first base layer initial light intensity and the first base layer transmitted light intensity, and the second base layer detection data includes the second base layer initial light intensity and the second base layer transmitted light intensity.

[0137] In the second step, graphite is first coated at a fixed coating speed, and then silicon is coated at at least two coating speeds respectively to form at least two composite coatings with preset proportions on the base layer. At the same time, the surface density of graphite is determined based on weighing the graphite and the base layer and the surface density of the base layer, and the surface density of silicon is determined based on weighing the base layer, graphite and silicon, the surface density of the base layer, and the surface density of graphite, and then the preset proportion of silicon is obtained, thereby forming at least two composite coatings with known preset proportions.

[0138] The third step is to obtain the first pole piece detection data corresponding to the base layer and the composite coating of the pole piece irradiated by the first light beam based on the third detection device after forming the pole piece of each composite coating with a preset proportion, and to obtain the second pole piece detection data corresponding to the base layer and the composite coating irradiated by the second light beam based on the fourth detection device.

[0139] The first pole piece detection data includes the first pole piece initial light intensity and the first pole piece transmitted light intensity, and the second pole piece detection data includes the second pole piece initial light intensity and the second pole piece transmitted light intensity.

[0140] The fourth step is to obtain the target scores corresponding to the electrode detection data sets (including the first electrode detection data and the second electrode detection data) under each preset proportion.

[0141] Based on at least two sets of preset proportions and the target scores corresponding to each preset proportion, a linear fit is performed with the preset proportions as the horizontal axis value and the target scores as the vertical axis value to obtain a corresponding linear formula.

[0142] The first constant is determined based on the intercept of the linear formula, and the second constant is determined based on the slope of the linear formula.

[0143] In the fifth step, graphite and silicon are coated on the base layer respectively using any coating speed combination, and the corresponding first initial light intensity, second initial light intensity, first transmitted light intensity and second transmitted light intensity are obtained, and substituted into the above linear formula (Equation 6) to determine the proportion and surface density of the target component (such as silicon).

[0144] Furthermore, the areal density of non-target components in the composite coating, such as the areal density of graphite, can be determined by the areal density of the composite coating and the areal density of the target component.

[0145] In summary, based on the above method, the unknown quantities in formula (6) other than the proportion of each light intensity and the target component can be determined, so as to construct a formula between each light intensity and the proportion of the target component, so as to realize the corresponding detection of the electrode of the proportion of any type of target component based on formula (6) and light intensity detection, thereby improving the flexibility, accuracy and reliability of the electrode detection method.

[0146] According to some embodiments of this application, please refer to Figure 8 , Figure 8 This is a schematic structural diagram of one or more embodiments of the detection device provided in this application.

[0147] The detection device 10 includes an acquisition unit 11 and a processing unit 12 .

[0148] The acquisition unit 11 is used to acquire first detection data corresponding to the composite coating on the pole piece being irradiated by the first light beam, and second detection data corresponding to the composite coating being irradiated by the second light beam.

[0149] The processing unit 12 is used to: Based on the first detection data and the second detection data, the proportion of the target component in the composite coating is determined.

[0150] Based on the second detection data, an areal density of the composite coating is determined.

[0151] The areal density of the target component is determined based on the proportion of the target component and the areal density of the composite coating.

[0152] The correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number.

[0153] The processing unit 12 can also be used to execute the steps of the pole piece detection method of any one or more embodiments described above, which will not be repeated here.

[0154] The present application selects a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number, so that the first detection data is greatly affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to the total surface density detection of the composite coating with components of at least two atomic numbers. On the basis of the above, a more accurate proportion of the target component can be determined based on the first detection data and the second detection data, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0155] According to some embodiments of this application, please refer to Figure 9 , Figure 9 A schematic structural diagram of one or more embodiments of the electronic device provided in this application.

[0156] The electronic device 20 includes a processor 21 , a memory 22 , and a bus 23 .

[0157] The processor 21 and the memory 22 are connected to the bus 23 respectively. The memory 22 stores program instructions. The processor 21 is used to execute the program instructions to implement the electrode detection method in the above embodiment.

[0158] In this embodiment, the processor 21 may also be referred to as a CPU (Central Processing Unit). The processor 21 may be an integrated circuit chip with signal processing capabilities. The processor 21 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. A general-purpose processor may be a microprocessor, or the processor 21 may be any conventional processor.

[0159] The present application selects a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number, so that the first detection data is greatly affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to the total surface density detection of the composite coating with components of at least two atomic numbers. On the basis of the above, a more accurate proportion of the target component can be determined based on the first detection data and the second detection data, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0160] According to some embodiments of this application, please refer to Figure 10 , Figure 10 A schematic diagram of the structure of one or more embodiments of the computer-readable storage medium provided in this application.

[0161] The computer-readable storage medium 30 stores program instructions 31 thereon. When the program instructions 31 are executed by a processor (not shown), the pole piece detection method in the above embodiment is implemented.

[0162] The computer-readable storage medium 30 in this embodiment can be, but is not limited to, a USB flash drive, an SD card, a PD optical drive, a mobile hard drive, a large-capacity floppy drive, a flash memory, a multimedia memory card, a server, a storage unit in an FPGA or an ASIC, etc.

[0163] The present application selects a first light beam with a relatively large correlation coefficient between the absorption coefficient and the atomic number, and a second light beam with a relatively small correlation coefficient between the absorption coefficient and the atomic number, so that the first detection data is greatly affected by the atomic number, which is conducive to determining the proportion of the target component with a higher atomic number, while the second detection data is less affected by the atomic number, which is conducive to the total surface density detection of the composite coating with components of at least two atomic numbers. On the basis of the above, a more accurate proportion of the target component can be determined based on the first detection data and the second detection data, and then the surface density of the composite coating can be determined based on the second detection data. Based on the proportion of the target component and the surface density of the composite coating, the surface density of the target component can be determined.

[0164] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pole piece detection method, characterized in that: include: Acquire first detection data corresponding to the composite coating on the pole piece being irradiated by the first light beam, and second detection data corresponding to the composite coating being irradiated by the second light beam; determining a proportion of a target component in the composite coating based on the first detection data and the second detection data; determining an area density of the composite coating based on the second detection data; Determining the areal density of the target component based on the proportion of the target component and the areal density of the composite coating; The correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number.

2. The pole piece detection method according to claim 1, characterized in that: The first detection data includes a first initial light intensity and a first transmitted light intensity, and the second detection data includes a second initial light intensity and a second transmitted light intensity; The first initial light intensity is the light intensity of the first light beam, the first transmitted light intensity is the light intensity of the transmitted light beam generated by the first light beam irradiating the composite coating, the second initial light intensity is the light intensity of the second light beam, and the second transmitted light intensity is the light intensity of the transmitted light beam generated by the second light beam irradiating the composite coating; Determining the proportion of the target component in the composite coating based on the first detection data and the second detection data includes: The proportion of the target component in the composite coating is determined based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity.

3. The pole piece detection method according to claim 2, characterized in that: Determining the proportion of the target component in the composite coating based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity includes: Obtaining a proportion of the target component based on the sum of the first value and the first constant; Among them, the first value is the product value obtained by multiplying the second constant by the target fraction, the numerator of the target fraction is the difference obtained by subtracting the natural logarithm of the first transmitted light intensity from the natural logarithm of the first initial light intensity, and the denominator of the target fraction is the difference obtained by subtracting the natural logarithm of the second initial light intensity from the natural logarithm of the second transmitted light intensity.

4. The pole piece detection method according to claim 3, characterized in that: Before obtaining the proportion of the target component based on the sum of the first value and the first constant, determining the proportion of the target component in the composite coating based on the first initial light intensity, the first transmitted light intensity, the second initial light intensity, and the second transmitted light intensity further includes: Acquire first base layer detection data corresponding to the base layer of the pole piece being irradiated by the first light beam, and second base layer detection data corresponding to the base layer being irradiated by the second light beam; Acquire first pole piece detection data corresponding to the first light beam irradiating the base layer and the composite coating of the pole piece, and second pole piece detection data corresponding to the second light beam irradiating the base layer and the composite coating; The first constant and the second constant are determined based on the first base layer detection data, the second base layer detection data, the first pole piece detection data, and the second pole piece detection data.

5. The pole piece detection method according to claim 4, characterized in that: The acquiring of first pole piece detection data corresponding to the first light beam irradiating the base layer and the composite coating of the pole piece, and second pole piece detection data corresponding to the second light beam irradiating the base layer and the composite coating, comprises: For electrodes of at least two target components with preset proportions, the steps of obtaining first electrode detection data corresponding to the base layer and composite coating of the electrode when the first light beam is irradiated, and second electrode detection data corresponding to the base layer and composite coating when the second light beam is irradiated are respectively performed to obtain at least two sets of electrode detection data corresponding to the preset proportions; wherein the sets of electrode detection data include the first electrode detection data and the second electrode detection data; The determining the first constant and the second constant based on the first base layer detection data, the second base layer detection data, the first pole piece detection data, and the second pole piece detection data includes: The first constant and the second constant are determined based on the first base layer detection data, the second base layer detection data and at least two sets of pole piece detection data corresponding to the preset proportions.

6. The pole piece detection method according to claim 5, characterized in that: The first base layer detection data includes the first base layer initial light intensity and the first base layer transmitted light intensity, and the second base layer detection data includes the second base layer initial light intensity and the second base layer transmitted light intensity; The first pole piece detection data includes the first pole piece initial light intensity and the first pole piece transmitted light intensity, and the second pole piece detection data includes the second pole piece initial light intensity and the second pole piece transmitted light intensity; The determining of the first constant and the second constant based on the first base layer detection data, the second base layer detection data, and at least two sets of electrode detection data corresponding to the preset proportions respectively includes: Obtain the target score corresponding to each of the pole piece detection data sets respectively; wherein the target score is the quotient obtained by dividing the second value by the third value, the second value is the difference obtained by subtracting the fifth value from the fourth value, the third value is the value obtained by subtracting the seventh value from the sixth value, the fourth value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the first pole piece from the natural logarithm of the transmitted light intensity of the first pole piece, the fifth value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the first base layer from the natural logarithm of the transmitted light intensity of the first base layer, the sixth value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the second pole piece from the natural logarithm of the transmitted light intensity of the second pole piece, and the seventh value is the difference obtained by subtracting the natural logarithm of the initial light intensity of the second base layer from the natural logarithm of the transmitted light intensity of the second base layer; The first constant and the second constant are determined based on at least two groups of the preset proportions and the target scores corresponding to the preset proportions.

7. The pole piece detection method according to claim 6, characterized in that: The determining the first constant and the second constant based on at least two groups of the preset proportions and the target scores corresponding to the preset proportions respectively includes: Based on at least two groups of the preset proportions and the target scores corresponding to the preset proportions, a linear fit is performed with the preset proportions as the horizontal axis value and the target scores as the vertical axis value to obtain a corresponding linear formula; The first constant is determined based on an intercept of the linear formula, and the second constant is determined based on a slope of the linear formula.

8. The pole piece detection method according to claim 4, characterized in that: The acquiring of first base layer detection data corresponding to the base layer of the pole piece being irradiated by the first light beam, and second base layer detection data corresponding to the base layer being irradiated by the second light beam, comprises: Acquire, based on a first detection device, first base layer detection data corresponding to the base layer of the pole piece being irradiated by the first light beam, and acquire, based on a second detection device, second base layer detection data corresponding to the base layer being irradiated by the second light beam; The acquiring of first pole piece detection data corresponding to the first light beam irradiating the base layer and the composite coating of the pole piece, and second pole piece detection data corresponding to the second light beam irradiating the base layer and the composite coating, comprises: Based on the third detection device, first pole piece detection data corresponding to the base layer and composite coating of the pole piece irradiated by the first light beam is obtained, and based on the fourth detection device, second pole piece detection data corresponding to the base layer and composite coating irradiated by the second light beam is obtained.

9. The pole piece detection method according to claim 8, characterized in that: The pole piece detection method further includes: determining, based on the first detection device, a first absorption coefficient of a first predetermined sheet having an area density of a first predetermined area density; determining a second absorption coefficient of the first preset sheet based on the third detection device; determining a first correction coefficient based on a quotient obtained by dividing the second absorption coefficient by the first absorption coefficient, and multiplying an initial value of the first base layer detection data by the first correction coefficient to obtain a correction value of the first base layer detection data, so as to determine the first constant and the second constant based on the correction value of the first base layer detection data; and / or, determining, based on the second detection device, a third absorption coefficient of a second predetermined sheet having an area density of a second predetermined area density; determining a fourth absorption coefficient of the second preset sheet based on the fourth detection device; Based on the quotient obtained by dividing the fourth absorption coefficient by the third absorption coefficient, a second correction coefficient is determined, and the initial value of the second base layer detection data is multiplied by the second correction coefficient to obtain a corrected value of the second base layer detection data, so as to determine the first constant and the second constant based on the corrected value of the second base layer detection data.

10. The pole piece detection method according to any one of claims 1 to 9, characterized in that: Before determining the surface density of the composite coating based on the second detection data, the pole piece detection method further includes: Obtaining a fifth absorption coefficient corresponding to a third preset slice having an irradiation area density of the second light beam being a third preset area density; Determining the surface density of the composite coating based on the second detection data includes: An areal density of the composite coating is determined based on the second detection data and the fifth absorption coefficient.

11. The pole piece detection method according to any one of claims 1 to 9, characterized in that: The obtaining of first detection data corresponding to the composite coating on the pole piece being irradiated by the first light beam and second detection data corresponding to the composite coating being irradiated by the second light beam comprises: Acquire first pole piece detection data corresponding to the base layer and the composite coating on the pole piece irradiated by the first light beam, first base layer detection data corresponding to the base layer on the pole piece irradiated by the first light beam, second pole piece detection data corresponding to the base layer and the composite coating on the pole piece irradiated by the second light beam, and second base layer detection data corresponding to the base layer on the pole piece irradiated by the second light beam; The first detection data is determined based on the difference obtained by subtracting the first base layer detection data from the first pole piece detection data, and the second detection data is determined based on the difference obtained by subtracting the second base layer detection data from the second pole piece detection data.

12. The pole piece detection method according to any one of claims 1 to 9, characterized in that: The first light beam is an X-ray, and / or the second light beam is a beta ray, and / or the target component is silicon, and / or the composite coating includes silicon and graphite.

13. A detection device, characterized in that: include: an acquisition unit, configured to acquire first detection data corresponding to the composite coating on the pole piece being irradiated by the first light beam, and second detection data corresponding to the composite coating being irradiated by the second light beam; A processing unit for: determining a proportion of a target component in the composite coating based on the first detection data and the second detection data; determining an area density of the composite coating based on the second detection data; Determining the areal density of the target component based on the proportion of the target component and the areal density of the composite coating; The correlation coefficient between the absorption coefficient of the first light beam and the atomic number is greater than the correlation coefficient between the absorption coefficient of the second light beam and the atomic number.

14. A detection device, characterized in that: include: memory and processor; The memory is used to store program instructions, and the processor is used to execute the program instructions to implement the method according to any one of claims 1 to 12.

15. A computer-readable storage medium, characterized in that The computer-readable storage medium stores program instructions, and when the program instructions are executed by a processor, the method according to any one of claims 1 to 12 is implemented.

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