CN116007506A - Method and device for detecting battery pole piece, computer equipment and storage medium - Google Patents
Method and device for detecting battery pole piece, computer equipment and storage medium Download PDFInfo
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Abstract
The embodiment of the application belongs to the technical field of battery detection, and relates to a detection method and device for a battery pole piece, computer equipment and a storage medium. The method comprises the following steps: firstly, obtaining at least one pole piece sample; then measuring first dimension data coated on a first surface of the pole piece sample and second dimension data coated on a second surface of the pole piece sample, wherein the first surface and the second surface are two opposite surfaces of the battery; finally, whether the first surface and the second surface are in coating error or not is detected according to the first size data and the second size data, namely, the two quantized data are compared, and whether the coating error occurs or not is further determined, so that whether the coating error occurs or not can be intuitively and accurately determined through the numerical value, on the other hand, the degree of the coating error can be further determined through the numerical value, the detection accuracy can be improved, and the detection result can be quantized and represented.
Description
Technical Field
The present disclosure relates to the field of battery detection technologies, and in particular, to a method and apparatus for detecting a battery pole piece, a computer device, and a storage medium.
Background
With the widespread use of consumer electronics and new energy electric vehicles, high specific energy lithium ion batteries have become one of the research hotspots for researchers, and high specific energy means higher risks. According to the statistical data, the electric automobile fire accident occurring in 2021 China reaches 3000, the electric automobile is about 784 ten thousand, the fire probability is nearly 4%, and the electric automobile fire accident is several times that of the fuel oil automobile.
Among them, the most important reason for the safety accident of the electric automobile is the battery safety problem. When graphite on the surface of the battery pole piece is missing, dendritic metal lithium can be formed when lithium ions are reduced in the charging process of the lithium battery. Dendritic metal lithium crystal (i.e., lithium dendrite) growth is one of the fundamental problems affecting the safety and stability of lithium ion batteries. The growth of lithium dendrites can lead to instability of the electrode and electrolyte interface in the cycling process of the lithium ion battery, damage of the generated Solid Electrolyte Interface (SEI) film, continuous consumption of electrolyte in the growth process of the lithium dendrites and irreversible deposition of metallic lithium, and formation of dead lithium to cause low coulombic efficiency. The formation of lithium dendrites can even puncture the separator to cause shorting inside the lithium ion battery, causing thermal runaway of the battery to initiate a combustion explosion.
One of the reasons for the lack of graphite on the surface of the battery pole piece is that in the manufacturing process of the battery pole piece, the coating of the positive pole and the negative pole of the battery is misplaced, so that the graphite on the edge of the pole piece is lost, lithium dendrites are formed in the subsequent charging and discharging processes, and safety accidents are caused.
For the double-sided (positive and negative electrode side) coating of a battery, conventional coating misalignment detection methods generally employ a needle punching test, by which the difference of the coated double-sided coating film is observed. The method is convenient, has certain requirements on operators, and has lower measurement accuracy and cannot be quantified.
Disclosure of Invention
An embodiment of the application aims to provide a method, a device, computer equipment and a storage medium for detecting a battery pole piece, so as to solve the technical problem that the detection precision is low, namely the battery pole piece cannot be quantified in the prior art.
In order to solve the above technical problems, the embodiments of the present application provide a method for detecting a battery pole piece, which adopts the following technical scheme:
the method comprises the following steps:
obtaining at least one pole piece sample;
measuring first dimensional data of a first side coating of the pole piece sample;
measuring second dimensional data coated on a second side of the pole piece sample, wherein the first side and the second side are opposite sides of the pole piece;
And detecting whether the first surface and the second surface are coated with errors according to the first size data and the second size data.
Further, the step of measuring the first dimension data of the first side coating of the pole piece sample further comprises:
measuring the size data of a first coating area of a first surface in the pole piece sample and the size data of two sides of the first coating area by adopting an image measuring instrument;
the step of measuring second dimension data of a second side coating of the pole piece sample further comprises:
and measuring the size data of a second coating area of the second surface of the pole piece sample and the size data of two sides of the second coating area by adopting an image measuring instrument.
Further, the step of detecting whether the first surface and the second surface have a coating error according to the first size data and the second size data further includes:
comparing the size data of the first coating area with the size data of the second coating area, comparing the size data of the two sides of the first coating area with the size data of the two sides of the second coating area, and judging whether the comparison result is larger than a preset threshold range;
And if the judgment result is yes, determining that the coating dislocation occurs on the first surface and the second surface of the battery.
Further, the step of obtaining at least one pole piece sample further includes:
and after finishing the pole piece coating process of one period, obtaining a plurality of pole piece samples finished at the tail of the period.
Further, the step of measuring the first dimension data of the first side coating of the pole piece sample further comprises:
measuring the size data of a first coating area of a first surface in each pole piece sample 5 by using an image measuring instrument and the size data of two sides of the first coating area by taking the edge of one side of each pole piece sample as a datum line, wherein the size data is a measured value based on the datum line;
the step of measuring second dimension data of a second side coating of the pole piece sample further comprises:
and measuring the size data of the second coating area of the second surface in each pole piece sample by using the edge of one side of the pole piece samples as a datum line and adopting an image measuring instrument, wherein the size data of the two sides of the second coating area 0 are measured based on the datum line.
Further, the step of measuring the first dimension data of the first side coating of the pole piece sample further comprises:
dividing a plurality of pole piece samples into two parts, wherein one part of the pole piece samples takes the edge of one side of the pole piece samples as a datum line, the other part of the pole piece samples takes the edge of the other 5 sides of the pole piece samples as a datum line, and measuring the size of a first coating area of a first surface in each pole piece sample and the sizes of two sides of the first coating area by adopting an image measuring instrument, wherein the sizes are measured values based on the datum line corresponding to the pole piece samples;
the step of measuring second dimension data of a second side coating of the pole piece sample further comprises:
dividing the pole piece samples into two parts, wherein one part of the pole piece samples takes the edge of one side of the pole piece samples as a datum line, the other part of the pole piece samples takes the edge of the other side of the pole piece samples as a datum line, an image measuring instrument is adopted to measure the size of a second coating area of a second face in each pole piece sample, and the sizes of two sides of the second coating area are measured based on the datum line corresponding to the pole piece samples.
Further, the step of detecting whether the first 5-side coating and the second-side coating have a coating error according to the first size data and the second size data further includes:
based on the datum line, comparing the difference between the size of a first coating area of the first surface and the size of a corresponding second coating area in the second surface, comparing the difference between the sizes of the two sides of the first coating area and the sizes of the two sides of the corresponding second coating area, and judging whether the comparison result is larger than a preset threshold range or not;
and if the judgment result is yes, determining that the coating dislocation occurs on the first surface and the second surface of the battery.
In order to solve the technical problem, the embodiment of the application also provides a detection device for a battery pole piece, which adopts the following technical scheme:
the device comprises:
the acquisition module is used for acquiring at least one pole piece sample;
the first measuring module is used for measuring first dimension data of the first surface coating of the pole piece sample;
a second measurement module for measuring second dimensional data of a second side coating of the pole piece sample, wherein the first side and the second side are two opposite sides of the pole piece;
And the detection module is used for detecting whether the first surface coating and the second surface coating have coating errors according to the first size data and the second size data.
In order to solve the above technical problems, the embodiments of the present application further provide a computer device, which adopts the following technical schemes:
the computer device comprises a memory and a processor, wherein the memory stores computer readable instructions, and the processor executes the computer readable instructions to realize the steps of the battery pole piece detection method.
In order to solve the above technical problems, embodiments of the present application further provide a computer readable storage medium, which adopts the following technical solutions:
the computer readable storage medium has stored thereon computer readable instructions which when executed by a processor implement the steps of the method of detecting a battery pole piece as described above.
Compared with the prior art, the embodiment of the application has the following main beneficial effects: the application provides a method and device for detecting a battery pole piece, computer equipment and a storage medium. The method comprises the following steps: firstly, obtaining at least one pole piece sample; then measuring first dimension data coated on a first surface of the pole piece sample and second dimension data coated on a second surface of the pole piece sample, wherein the first surface and the second surface are two opposite surfaces of the battery, and obtaining a coated quantized numerical value by measuring the coated first dimension data and the coated second dimension data; finally, whether the first surface and the second surface are in coating error or not is detected according to the first size data and the second size data, namely, the two quantized data are compared, and whether the coating error occurs or not is further determined, so that whether the coating error occurs or not can be intuitively and accurately determined through the numerical value, on the other hand, the degree of the coating error can be further determined through the numerical value, the detection accuracy can be improved, and the detection result can be quantized and represented.
Drawings
For a clearer description of the solution in the present application, a brief description will be given below of the drawings that are needed in the description of the embodiments of the present application, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is an exemplary system architecture diagram in which the present application may be applied;
FIG. 2 is a flow chart of one embodiment of a method of detecting a battery pole piece according to the present application;
FIG. 3A is a schematic diagram of one specific example of a battery pole piece-based detection method of the present application;
FIG. 3B is a schematic diagram of another specific example of a battery pole piece-based detection method of the present application;
FIG. 3c is a schematic diagram of yet another specific example of a battery pole piece based detection method of the present application;
FIG. 4 is a schematic diagram of the structure of one embodiment of a high current testing device for a battery according to the present application;
FIG. 5 is a schematic structural diagram of one embodiment of a computer device according to the present application.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In order to better understand the technical solutions of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings.
The coating effect of the battery affects the safe use of the battery, in the prior art, a needling perforation test is generally adopted, specifically, a needling perforation is adopted on one surface of a pole piece, for example, a needling perforation is adopted at the coating edge position of the cathode piece surface, a needle penetrates through a pole piece sample to reach the anode piece surface, and then whether the position of the needle on the anode piece surface is positioned at the coating edge of the anode piece surface is observed, so that whether the coating of the anode piece and the cathode piece is misplaced is verified. In the needling perforation detection method in the prior art, the operator needs to be strictly trained by manual perforation, the technical requirement on the operator is high, the operator is easy to influence the technology, the detection precision is low, in addition, the needling perforation detection method can only detect whether the coating on the two sides of the positive and negative pole pieces is not at the same needle perforation position, whether the coating is misplaced or not is proved in sequence, and the misplacement degree cannot be quantified when the coating misplacement occurs. Based on the detection method, the application provides a pole piece detection method of a battery, so as to solve the problems of low detection precision and incapability of quantification in the prior art. See in detail below.
Referring to fig. 1, fig. 1 is an exemplary system architecture diagram to which the present application may be applied. As shown in fig. 1, a system architecture 100 may include terminal devices 101, 102, 103, a network 104, and a server 105. The network 104 is used as a medium to provide communication links between the terminal devices 101, 102, 103 and the server 105. The network 104 may include various connection types, such as wired, wireless communication links, or fiber optic cables, among others.
The user may interact with the server 105 via the network 104 using the terminal devices 101, 102, 103 to receive or send messages or the like. The terminal devices 101, 102, 103 may have shooting applications installed thereon, such as cameras, scanners, radars, sensors, etc.; various communication client applications, such as a web browser application, a shopping class application, a search class application, an instant messaging tool, a mailbox client, social platform software, etc., may also be installed on the terminal devices 101, 102, 103.
The terminal devices 101, 102, 103 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smartphones, tablet computers, electronic book readers, MP3 players (Moving Picture Experts Group Audio Layer III, dynamic video expert compression standard audio plane 3), MP4 (Moving Picture Experts Group Audio Layer IV, dynamic video expert compression standard audio plane 4) players, laptop and desktop computers, and the like.
The server 105 may be a server providing various services, such as a background server providing support for pages displayed on the terminal devices 101, 102, 103.
It should be noted that, the method for detecting the battery pole piece provided in the embodiment of the present application is generally executed by a server/terminal device, and in practical application, the server/terminal device may send instruction information in the method for detecting the battery pole piece to the mobile terminal, and the mobile terminal may execute a corresponding operation according to the instruction. Accordingly, battery pole piece based detection means are typically provided in the server/terminal device.
It should be understood that the number of terminal devices, networks and servers in fig. 1 is merely illustrative. There may be any number of terminal devices, networks, and servers, as desired for implementation.
With continued reference to fig. 2, a schematic structural diagram of one embodiment of a method of detecting a battery pole piece according to the present application is shown. As shown in fig. 2, the method of the present embodiment includes:
step S201: at least one pole piece sample is obtained.
In the battery manufacturing process, the coated areas are formed by coating a film on the foil substrate, for example, on two opposite surfaces of the foil substrate, which can subsequently form the positive and negative electrodes of the battery.
In the step, the pole piece sample is obtained, namely the foil substrate sample coated with the film layer to form a coating area is obtained. In one embodiment, a pole piece sample may be obtained at the end of the pole piece coating cycle after the cycle is completed. Specifically, when the electrode plate is coated, a continuous foil substrate may be provided first, then coating layers are sequentially coated on the foil substrate to form coating areas of each cell, for example, 100 coating areas are defined and coated in each coating period, then a foil capable of coating 100 coating areas is provided, then coating layers are sequentially coated on the foil, and one period of coating is completed after 100 coating areas are completed. After finishing the coating of one cycle, the pole piece at the tail of the coating cycle is obtained as a pole piece sample, for example, the last pole piece can be obtained as a pole piece sample, or the last preset pole pieces can be obtained as pole piece samples.
It should be appreciated that on the pole piece samples, the foil substrate is larger than the coated area, i.e. the coated area does not cover the entire foil substrate.
Step S202: first dimensional data of a first side coating of the pole piece sample is measured.
As described above, on the pole piece samples, the foil substrate is larger than the coated area, i.e. the coated area does not cover the entire foil substrate. Therefore, measured in this step are the size data of the first coated region in the first face and the size data of both sides of the first coated region. If the pole piece sample is one, the dimension data from the edge position of the foil substrate to the first coating area in the first face and the dimension data on both sides of the first coating area are measured. As shown in fig. 3a, in this step, the edge 301 at one side of the foil substrate 300 is taken as a reference line, and the dimension between the edge 301 and the edge 302 of the first coating region is measured to obtain dimension data A1; further measuring the size of the edge 302 of the first coating area to the edge 303 of the first coating area or measuring the size of the edge 301 of the foil substrate 300 to the edge 303 of the first coating area, obtaining size data A2; finally, the dimension from the edge 303 of the first coating region to the edge 304 of the other side of the foil substrate 300 is measured, or the dimension from the edge 301 of the foil substrate 300 to the edge 304 is measured, to obtain dimension data A3.
Similarly, if a plurality of pole piece samples are obtained, the step uses the edge of one side of the plurality of pole piece samples as a datum line, measures the size data of the first coating area of the first surface in each pole piece sample and the size data of two sides of the first coating area, wherein the size data is a measured value based on the datum line. Specifically, it may participate in the illustration of fig. 3B. On the first surface of the foil substrate 300, measuring the size between the edge 301 and the edge 302 of the first coating area by taking the edge 301 on one side of the foil substrate 300 as a reference line, and obtaining size data A1; further measuring the size of the edge 302 of the first coating area to the edge 303 of the first coating area or measuring the size of the edge 301 of the foil substrate 300 to the edge 303 of the first coating area, obtaining size data A2; finally, the dimension from the edge 303 of the first coating region to the edge 304 of the other side of the foil substrate 300 is measured, or the dimension from the edge 301 of the foil substrate 300 to the edge 304 is measured, to obtain dimension data A3. And so on, the dimensions of the other first coated areas were measured sequentially, resulting in A4, A5, A6, A7, A8 and A9 as shown.
It should be noted that the above-mentioned calculation schemes of the dimension data of the pole piece samples are all based on the edge 301 of the foil substrate 300. In another embodiment, particularly where there are more pole pieces samples
The pole piece sample can be divided into two parts, wherein one part of the pole piece sample takes the edge 301 of the foil substrate 300 as a5 reference line, and the size of a first coating area of a first surface in each pole piece sample and the sizes of two sides of the first coating area are measured; the other part of the pole piece samples takes the edge 304 of the foil substrate 300 as a datum line, and the size of the first coating area of the first face in each pole piece sample and the sizes of the two sides of the first coating area are measured. For example, the areas A1, A2, A3, A4 and A5 are edges of the foil substrate 300
The rim 301 is the dimension data measured by the reference line. The areas A6, A7, A8, A9 are size data measured with the 0 edge 305 of the foil substrate 300 as a reference line.
In this step, the film substrate 300 is photographed by using an image measuring apparatus, such as CNC (Computerized Numerical Control, numerical control machine) image measuring apparatus, to measure the above dimension data.
Step S203: second dimensional data of a second side coating of the pole piece sample is measured, wherein the first side 5 and the second side are opposite sides of the battery.
Similar to step S202, the size data of the second coating region in the second face and the size data of both sides of the second coating region are measured in this step. If the pole piece sample is one, the measurement is the size data from the edge position of the foil substrate to the second coating area in the second face, and the ruler on two sides of the second coating area
Dimensional data. As shown in fig. 3a, the step uses an edge 305 on one side of the foil substrate 300 as a reference line, and measures the dimension between the edge 0 and an edge 306 of the second coating region to obtain dimension data A4; further measurement of
The dimension from the edge 306 of the second coating area to the edge 307 of the second coating area, or the dimension from the edge 305 of the foil substrate 300 to the edge 307 of the second coating area is measured to obtain dimension data A5; finally, the dimension of the edge 307 of the second coated region to the edge 308 of the other side of the foil substrate 300 is measured, or
The dimensions of the edge 305 to edge 308 of the foil substrate 300 are measured to obtain dimension data A6.
Similarly, if a plurality of pole piece samples are obtained, the step takes the edge of one side of the plurality of pole piece samples as a datum line, measures the size data of the second coating area of the second surface in each pole piece sample and the size data of two sides of the second coating area, wherein the size data is a measured value based on the datum line. Specifically, it may participate in the illustration of fig. 3B. On the second surface of the foil substrate 300, measuring the dimension between the edge 306 and the edge 307 of the second coating region by taking the edge 306 on one side of the foil substrate 300 as a reference line, to obtain dimension data a10; further measuring the dimension from the edge 307 of the second coating region to the edge 308 of the second coating region, or measuring the dimension from the edge 306 of the foil substrate 300 to the edge 308 of the second coating region, to obtain dimension data a11; finally, the dimension from the edge 308 of the second coating region to the edge 309 on the other side of the foil substrate 300 is measured, or the dimension from the edge 306 of the foil substrate 300 to the edge 309 is measured, to obtain dimension data a12. And so on, the dimensions of the other second coated areas were measured sequentially, resulting in a13, a14, a15, a16, a17 and a18 as shown.
It should be noted that the above-mentioned calculation schemes of the dimension data of the pole piece samples are all based on the edge 306 of the foil substrate 300. In another embodiment, particularly in the case of more pole piece samples, the pole piece samples may be divided into two parts, wherein one part of the pole piece samples uses the edge 306 of the foil substrate 300 as a reference line, and the size of the second coating area of the second surface in each pole piece sample and the sizes of two sides of the second coating area are measured; the other part of the pole piece samples takes the edge 310 of the foil substrate 300 as a datum line, and the size of the second coating area of the second face in each pole piece sample and the sizes of two sides of the second coating area are measured. For example, the areas a10, a11, a12, a13, a14 are dimension data measured with the edge 306 of the foil substrate 300 as a reference line. The areas a15, a16, a17, a18 are size data measured with the edge 310 of the foil substrate 300 as a reference line.
Step S204: and detecting whether the first surface and the second surface are coated with errors according to the first size data and the second size data.
Specifically, difference comparison is performed on the size data of the first coating area and the size data of the second coating area, difference comparison is performed on the size data of two sides of the first coating area and the size data of two sides of the second coating area, whether the comparison result is larger than a preset threshold range is judged, and if the judgment result is yes, it is determined that coating dislocation occurs on the first surface and the second surface of the battery. For example, in fig. 3A, A1 and A4 are compared in difference, A2 and A5 are compared in difference, A3 and A6 are compared in difference, whether the differences are all larger than a preset threshold range is determined, and if yes, the first surface and the second surface are determined to have coating dislocation. In addition, because each size has a quantized value, the quantized value of the coating dislocation can be known, and correction is convenient.
In addition, if the number of the obtained pole piece samples is multiple, the step is based on the datum line, the difference value between the size of the first coating area of the first face and the size of the corresponding second coating area in the second face is compared, the difference value between the sizes of the two sides of the first coating area and the sizes of the two sides of the corresponding second coating area is compared, whether the comparison result is larger than a preset threshold range or not is judged, and if the judgment result is yes, the fact that coating dislocation occurs between the first face and the second face of the battery is confirmed. For example, as shown in fig. 3B, A1 and A4 are compared with each other, A2 and A5 are compared with each other, A3 and A6 are compared with each other, and so on, A8 and a17 are compared with each other, A9 and a18 are compared with each other, whether the differences are larger than a preset threshold range is determined, if yes, the first surface and the second surface are determined to have coating misalignment. In addition, because each size has a quantized value, the quantized value of the coating dislocation can be known, and correction is convenient.
For an example of the method for detecting the pole piece of the battery described above, please refer to fig. 3C, a sample of 100-200 mm of the coated tail pole piece is taken. Firstly, the first surface is tiled upwards on a CNC image measuring instrument detection table for size detection, and the measurement is carried out according to the following method:
The first step: taking 8 pieces of 4 strips as an example, taking the edges of the above foils as reference lines, and adopting a point location method to respectively measure the sizes L1 to L9 according to the mark of FIG. 3C;
and a second step of: turning the pole piece sample according to the turn line in FIG. 3C, with the second face facing upwards, and measuring the dimensions L10-L18 according to the method in the first step;
and a third step of: according to the first and second side misalignment principle, the multiple coated double-sided misalignment values are the difference of the edge coordinates of each single film area, for example: the uppermost coated film region in fig. 3C has first and second face misalignment values of:
the outer sides L1-L10, the inner sides Σ (L1, L2) - Σ (L10, L11), i.e. the offset value of the outer side foil dimensions of the coating area in the uppermost coating film area is: L1-L10; since each dimension is measured with the foil edge as a reference line, the misalignment value of the inner dimension of the coated area is: (L1+L2) - (L10+L11). By analogy, the lowest coated film region in fig. 3C has first and second side misalignment values of:
the offset value of the outside foil size of the coated area is: Σ (L1 to L7) - Σ (L10 to L16), the misalignment value of the inner dimension of the coating area is: sigma (L1 to L8) - Σ (L10 to L17).
In summary, the method for detecting the pole piece of the battery is convenient to operate, the coating size is a key index, the coating size can be measured, meanwhile, the dislocation value of the first surface and the second surface can be calculated according to the size measured value, the dislocation value can be quantitatively adjusted, and a proper compensation value is given to the size CCD in the coating process according to the dislocation value; in addition, the detection precision is higher, and compared with the needling perforation measurement, the method can reach 0.001mm in precision.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by computer readable instructions stored in a computer readable storage medium that, when executed, may comprise the steps of the embodiments of the methods described above. The storage medium may be a nonvolatile storage medium such as a magnetic disk, an optical disk, a Read-Only Memory (ROM), or a random access Memory (Random Access Memory, RAM).
It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the flowcharts of the figures may include a plurality of sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily being sequential, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.
With further reference to fig. 4, as an implementation of the method shown in fig. 2, the present application provides an embodiment of a device for detecting a battery pole piece, where the embodiment of the device corresponds to the embodiment of the method shown in fig. 2, and the device may be specifically applied to various electronic devices.
As shown in fig. 4, the detection device 400 for a battery pole piece according to the present embodiment includes an acquisition module 401, a first measurement module 402, a second measurement module 403, and a detection module 404. Wherein:
the acquisition module 401 is configured to acquire at least one pole piece sample.
The obtaining module 401 obtains the pole piece sample, that is, obtains the foil substrate sample coated with the film layer forming coating region. In one embodiment, a pole piece sample may be obtained at the end of the pole piece coating cycle after the cycle is completed. Specifically, when the electrode plate is coated, a continuous foil substrate may be provided first, then coating layers are sequentially coated on the foil substrate to form coating areas of each cell, for example, 100 coating areas are defined and coated in each coating period, then a foil capable of coating 100 coating areas is provided, then coating layers are sequentially coated on the foil, and one period of coating is completed after 100 coating areas are completed. After finishing the coating of one cycle, the pole piece at the tail of the coating cycle is obtained as a pole piece sample, for example, the last pole piece can be obtained as a pole piece sample, or the last preset pole pieces can be obtained as pole piece samples.
It should be appreciated that on the pole piece samples, the foil substrate is larger than the coated area, i.e. the coated area does not cover the entire foil substrate.
The first measurement module 402 is configured to measure first dimension data of a first side coating of the pole piece sample.
As described above, on the pole piece samples, the foil substrate is larger than the coated area, i.e. the coated area does not cover the entire foil substrate. Thus, the first measurement module 402 measures the size data of the first coated area in the first side and the size data of both sides of the first coated area. If the pole piece sample is one, the dimension data from the edge position of the foil substrate to the first coating area in the first face and the dimension data on both sides of the first coating area are measured.
Similarly, if there are a plurality of pole piece samples obtained, the first measurement module 402 measures the size data of the first coating area of the first face in each of the pole piece samples, and the size data of both sides of the first coating area, with the edge of one side of the plurality of pole piece samples as a reference line, the size data being a measurement value based on the reference line.
It should be noted that the dimension data calculation schemes of the pole piece samples all use the edge of one side of the foil substrate as the datum line. In another embodiment, particularly in the case of more pole piece samples, the pole piece sample may be divided into two parts, and one part of the pole piece sample uses one side edge of the foil substrate, for example, the edge 301 in fig. 3B as a reference line, and measures the size of the first coating area of the first face in each pole piece sample, and the sizes of both sides of the first coating area; another portion of the pole piece samples were measured for the dimensions of the first coated area on the first side of each pole piece sample and the dimensions of both sides of the first coated area with the other side edge of the foil substrate 300, such as edge 304 in fig. 3B as a reference line.
In some alternative implementations of the present embodiment, the first measurement module 402 may specifically use an image measurement device, such as a CNC (Computerized Numerical Control, numerical control machine) image measurement device, to measure the above dimensional data.
A second measurement module 403 is configured to measure second dimensional data of a second side coating of the pole piece sample, wherein the first side and the second side are opposite sides of the pole piece.
Similar to the first measurement module 402, the second measurement module 403 measures size data of the second coated area in the second face and size data of both sides of the second coated area. If the pole piece sample is one, the dimension data from the edge position of the foil substrate to the second coating area in the second face and the dimension data on two sides of the second coating area are measured. In particular as described hereinbefore.
Similarly, if there are a plurality of pole piece samples obtained, the second measurement module 403 measures the size data of the second coated area of the second face in each of the pole piece samples, and the size data of both sides of the second coated area, with the edge of one side of the plurality of pole piece samples as a reference line, the size data being a measurement value based on the reference line.
It should be noted that the above-mentioned calculation schemes of the dimension data of the pole piece samples are all based on the edge of one side of the foil substrate, such as the edge 306 in fig. 3B. In another embodiment, particularly in the case of more pole piece samples, the pole piece sample may be divided into two parts, and one part of the pole piece sample uses an edge of one side of the foil substrate, such as edge 306 in fig. 3B as a reference line, to measure the size of the second coating area of the second face in each pole piece sample, and the sizes of both sides of the second coating area; another part of the pole piece samples take the edge of the other side of the foil substrate, such as the edge of 310 in FIG. 3B as a datum line, measure the size of a second coating area of a second face in each pole piece sample, and the sizes of two sides of the second coating area
The detection module 404 is configured to detect from the first size data and the second size data.
In some optional implementations of this embodiment, the detection module 404 compares the difference between the size data of the first coating region and the size data of the second coating region, and compares the difference between the size data of both sides of the first coating region and the size data of both sides of the second coating region, to determine whether the comparison result is greater than a preset threshold range, and if so, to determine that the first side and the second side of the battery are subjected to coating misalignment. As described above, the details are not described here.
In some optional implementations of this embodiment, if the number of pole piece samples obtained is multiple, the detection module 404 compares the difference between the size of the first coating region of the first face and the size of the corresponding second coating region of the second face based on the reference line, compares the difference between the sizes of the two sides of the first coating region and the sizes of the two sides of the corresponding second coating region, determines whether the comparison result is greater than a preset threshold range, and if the determination result is yes, determines that coating misalignment occurs between the first face and the second face of the battery. As described above, the details are not described here.
In summary, the method for detecting the pole piece of the battery is convenient to operate, the coating size is a key index, the coating size can be measured, meanwhile, the dislocation value of the first surface and the second surface can be calculated according to the size measured value, the dislocation value can be quantitatively adjusted, and a proper compensation value is given to the size CCD in the coating process according to the dislocation value; in addition, the detection precision is higher, and compared with the needling perforation measurement, the method can reach 0.001mm in precision.
In order to solve the technical problems, the embodiment of the application also provides computer equipment. Referring specifically to fig. 5, fig. 5 is a basic structural block diagram of a computer device according to the present embodiment.
The computer device 6 comprises a memory 61, a processor 62, a network interface 63 communicatively connected to each other via a system bus. It is noted that only computer device 6 having components 61-63 is shown in the figures, but it should be understood that not all of the illustrated components are required to be implemented and that more or fewer components may be implemented instead. It will be appreciated by those skilled in the art that the computer device herein is a device capable of automatically performing numerical calculations and/or information processing in accordance with predetermined or stored instructions, the hardware of which includes, but is not limited to, microprocessors, application specific integrated circuits (Application Specific Integrated Circuit, ASICs), programmable gate arrays (fields-Programmable Gate Array, FPGAs), digital processors (Digital Signal Processor, DSPs), embedded devices, etc.
The computer equipment can be a desktop computer, a notebook computer, a palm computer, a cloud server and other computing equipment. The computer equipment can perform man-machine interaction with a user through a keyboard, a mouse, a remote controller, a touch pad or voice control equipment and the like.
The memory 61 includes at least one type of readable storage media including flash memory, hard disk, multimedia card, card memory (e.g., SD or DX memory, etc.), random Access Memory (RAM), static Random Access Memory (SRAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), programmable Read Only Memory (PROM), magnetic memory, magnetic disk, optical disk, etc. In some embodiments, the storage 61 may be an internal storage unit of the computer device 6, such as a hard disk or a memory of the computer device 6. In other embodiments, the memory 61 may also be an external storage device of the computer device 6, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card) or the like, which are provided on the computer device 6. Of course, the memory 61 may also comprise both an internal memory unit of the computer device 6 and an external memory device. In this embodiment, the memory 61 is typically used for storing an operating system and various application software installed on the computer device 6, such as computer readable instructions of a high current testing method of a battery. Further, the memory 61 may be used to temporarily store various types of data that have been output or are to be output.
The processor 62 may be a central processing unit (Central Processing Unit, CPU), controller, microcontroller, microprocessor, or other data processing chip in some embodiments. The processor 62 is typically used to control the overall operation of the computer device 6. In this embodiment, the processor 62 is configured to execute computer readable instructions stored in the memory 61 or process data, such as computer readable instructions for executing a method for detecting the battery pole piece.
The network interface 63 may comprise a wireless network interface or a wired network interface, which network interface 63 is typically used for establishing a communication connection between the computer device 6 and other electronic devices.
The present application also provides another embodiment, namely, a computer-readable storage medium, where computer-readable instructions are stored, where the computer-readable instructions are executable by at least one processor to cause the at least one processor to perform the steps of the method for detecting a battery pole piece as described above.
The detection of the battery pole piece of this application includes: firstly, obtaining at least one pole piece sample; then measuring first dimension data coated on a first surface of the pole piece sample and second dimension data coated on a second surface of the pole piece sample, wherein the first surface and the second surface are two opposite surfaces of the battery, and obtaining a coated quantized numerical value by measuring the coated first dimension data and the coated second dimension data; finally, whether the first surface and the second surface are in coating error or not is detected according to the first size data and the second size data, namely, the two quantized data are compared, and whether the coating error occurs or not is further determined, so that whether the coating error occurs or not can be intuitively and accurately determined through the numerical value, on the other hand, the degree of the coating error can be further determined through the numerical value, the detection accuracy can be improved, and the detection result can be quantized and represented.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.
It is apparent that the embodiments described above are only some embodiments of the present application, but not all embodiments, the preferred embodiments of the present application are given in the drawings, but not limiting the patent scope of the present application. This application may be embodied in many different forms, but rather, embodiments are provided in order to provide a more thorough understanding of the present disclosure. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing, or equivalents may be substituted for elements thereof. All equivalent structures made by the specification and the drawings of the application are directly or indirectly applied to other related technical fields, and are also within the protection scope of the application.
Claims (10)
1. A method for detecting a battery pole piece, the method comprising:
obtaining at least one pole piece sample;
measuring first dimensional data of a first side coating of the pole piece sample;
measuring second dimensional data coated on a second side of the pole piece sample, wherein the first side and the second side are opposite sides of the battery;
and detecting whether the first surface and the second surface are coated with errors according to the first size data and the second size data.
2. The method of claim 1, wherein the step of measuring first dimension data of the first side coating of the pole piece sample further comprises:
measuring the size data of a first coating area of a first surface in the pole piece sample and the size data of two sides of the first coating area by adopting an image measuring instrument;
the step of measuring second dimension data of a second side coating of the pole piece sample further comprises:
and measuring the size data of a second coating area of the second surface of the pole piece sample and the size data of two sides of the second coating area by adopting an image measuring instrument.
3. The method of claim 2, wherein the step of detecting whether a coating error has occurred on the first side and the second side based on the first size data and the second size data, further comprises:
Comparing the size data of the first coating area with the size data of the second coating area, comparing the size data of the two sides of the first coating area with the size data of the two sides of the second coating area, and judging whether the comparison result is larger than a preset threshold range;
and if the judgment result is yes, determining that the coating dislocation occurs on the first surface and the second surface of the battery.
4. A method according to any one of claims 1 to 3, wherein the step of obtaining at least one pole piece sample further comprises:
and after finishing the pole piece coating process of one period, obtaining a plurality of pole piece samples finished at the tail of the period.
5. The method of claim 4, wherein the step of measuring first dimension data of the first side coating of the pole piece sample further comprises:
measuring the size data of a first coating area of a first surface in each pole piece sample and the size data of two sides of the first coating area by using the edge of one side of the pole piece samples as a datum line and adopting an image measuring instrument, wherein the size data is a measured value based on the datum line;
The step of measuring second dimension data of a second side coating of the pole piece sample further comprises:
and measuring the size data of the second coating area of the second surface in each pole piece sample and the size data of the two sides of the second coating area by using the edges of one side of the pole piece samples as reference lines and adopting an image measuring instrument, wherein the size is a measured value based on the reference lines.
6. The method of claim 4, wherein the step of measuring first dimension data of the first side coating of the pole piece sample further comprises:
dividing a plurality of pole piece samples into two parts, wherein one part of the pole piece samples takes the edge of one side of the pole piece samples as a datum line, and the other part of the pole piece samples takes the edge of the other side of the pole piece samples as a datum line, and measuring the size of a first coating area of a first surface in each pole piece sample and the sizes of two sides of the first coating area by adopting an image measuring instrument, wherein the sizes are measured values based on the datum line corresponding to the pole piece samples;
the step of measuring second dimension data of a second side coating of the pole piece sample further comprises:
Dividing the pole piece samples into two parts, wherein one part of the pole piece samples takes the edge of one side of the pole piece samples as a datum line, the other part of the pole piece samples takes the edge of the other side of the pole piece samples as a datum line, and measuring the size of a second coating area of a second face in each pole piece sample and the sizes of two sides of the second coating area by adopting an image measuring instrument, wherein the sizes are measured values based on the datum line corresponding to the pole piece samples.
7. The method according to claim 5 or 6, wherein the step of detecting whether a coating error occurs in the first side coating and the second side coating based on the first size data and the second size data, further comprises:
based on the datum line, comparing the difference between the size of a first coating area of the first surface and the size of a corresponding second coating area in the second surface, comparing the difference between the sizes of the two sides of the first coating area and the sizes of the two sides of the corresponding second coating area, and judging whether the comparison result is larger than a preset threshold range or not;
and if the judgment result is yes, determining that the coating dislocation occurs on the first surface and the second surface of the battery.
8. A device for detecting a battery pole piece, the device comprising:
the acquisition module is used for acquiring at least one pole piece sample;
the first measuring module is used for measuring first dimension data of the first surface coating of the pole piece sample;
a second measurement module for measuring second dimensional data of a second side coating of the pole piece sample, wherein the first side and the second side are two opposite sides of the pole piece;
and the detection module is used for detecting whether the first surface coating and the second surface coating have coating errors according to the first size data and the second size data.
9. A computer device comprising a memory having stored therein computer readable instructions and a processor that when executed performs the steps of the method for detecting a battery pole piece according to any of claims 1 to 7.
10. A computer readable storage medium having stored thereon computer readable instructions which when executed by a processor implement the steps of the method of detecting a battery pole piece according to any of claims 1 to 7.
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| CN202211620659.8A CN116007506A (en) | 2022-12-15 | 2022-12-15 | Method and device for detecting battery pole piece, computer equipment and storage medium |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116899837A (en) * | 2023-09-12 | 2023-10-20 | 宁德时代新能源科技股份有限公司 | Coating system and method |
| CN117213372A (en) * | 2023-11-09 | 2023-12-12 | 宁德时代新能源科技股份有限公司 | Pole piece detection method and system |
| CN117722955A (en) * | 2024-02-08 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Coating misalignment detection method, apparatus, computer device, and storage medium |
-
2022
- 2022-12-15 CN CN202211620659.8A patent/CN116007506A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116899837A (en) * | 2023-09-12 | 2023-10-20 | 宁德时代新能源科技股份有限公司 | Coating system and method |
| CN116899837B (en) * | 2023-09-12 | 2024-03-29 | 宁德时代新能源科技股份有限公司 | Coating system and method |
| CN117213372A (en) * | 2023-11-09 | 2023-12-12 | 宁德时代新能源科技股份有限公司 | Pole piece detection method and system |
| CN117213372B (en) * | 2023-11-09 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Pole piece detection method and system |
| CN117722955A (en) * | 2024-02-08 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Coating misalignment detection method, apparatus, computer device, and storage medium |
| CN117722955B (en) * | 2024-02-08 | 2024-06-07 | 宁德时代新能源科技股份有限公司 | Coating misalignment detection method, apparatus, computer device, and storage medium |
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