WO2025213610A1 - 极片涂布削薄区的边界确定方法、装置、电子设备及介质 - Google Patents

极片涂布削薄区的边界确定方法、装置、电子设备及介质

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Publication number
WO2025213610A1
WO2025213610A1 PCT/CN2024/105763 CN2024105763W WO2025213610A1 WO 2025213610 A1 WO2025213610 A1 WO 2025213610A1 CN 2024105763 W CN2024105763 W CN 2024105763W WO 2025213610 A1 WO2025213610 A1 WO 2025213610A1
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WO
WIPO (PCT)
Prior art keywords
area
negative electrode
initial
electrode
thinning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/105763
Other languages
English (en)
French (fr)
Inventor
程庆顺
苏斌
赵宇昊
陈利权
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eve Power Co Ltd
Original Assignee
Eve Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202410410696.9A external-priority patent/CN118364613B/zh
Application filed by Eve Power Co Ltd filed Critical Eve Power Co Ltd
Priority to EP24216980.3A priority Critical patent/EP4629298A1/en
Priority to US19/023,828 priority patent/US20250314481A1/en
Publication of WO2025213610A1 publication Critical patent/WO2025213610A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation

Definitions

  • the present application relates to the field of battery technology, and in particular to a method, device, electronic device and medium for determining the boundary of a pole piece coating thinning area.
  • Coating is a basic process in the manufacturing process of lithium-ion batteries.
  • the positive and negative electrodes of lithium-ion batteries are obtained by coating the slurry on the foil.
  • the area in the electrode where the thinning is performed is the coating thinning area.
  • the boundary of the electrode coating thinning area is set directly based on empirical values, which cannot ensure the accuracy of the boundary of the electrode coating thinning area. It is easy for the electrode coating edge thinning area to be insufficient or excessive. This method makes the boundary design of the electrode coating thinning area unreasonable, which affects the battery cell's electrode edge to cause more lithium deposition or insufficient lithium insertion, which is not conducive to improving the battery cell's electrical performance and safety performance.
  • an embodiment of the present application provides a method for determining the boundary of a pole piece coating thinning area, the method comprising:
  • At least one contour curve constituting a profile of a thinned area is obtained from a set of contour curves corresponding to an initially coated thinned area of a target electrode as an initial contour curve, wherein the set of contour curves includes a plurality of contour curves constituting a plurality of profiles of the thinned areas;
  • the initial contour curve is determined as the boundary of the initial coating thinning area.
  • an embodiment of the present application provides a device for determining a boundary of a pole piece coating thinning area, the device for determining a boundary of a pole piece coating thinning area comprising:
  • An acquisition module is used to acquire at least one contour curve constituting a profile of a thinned area from a set of contour curves corresponding to the initial coated thinned area of the target electrode as an initial contour curve, wherein the contour curve set includes multiple contour curves constituting multiple profiles of the thinned area;
  • the first determination module is used to determine the initial positive and negative electrode capacity ratio corresponding to the target electrode piece according to the material area surface density corresponding to the material area in the target electrode piece and the initial contour curve;
  • the second determining module is configured to determine the initial contour curve as the boundary of the initial coating thinning area if the initial positive-to-negative electrode capacity ratio satisfies a preset positive-to-negative electrode capacity ratio.
  • an embodiment of the present application provides an electronic device, the electronic device comprising:
  • processors one or more processors
  • One or more applications wherein the one or more applications are stored in a memory and configured to be executed by a processor to implement the steps in the method for determining the boundary of a pole piece coating thinning area of any one of the first aspects.
  • the present application further provides a computer-readable storage medium having a computer program stored thereon, which is loaded by a processor to execute the steps in the method for determining the boundary of the electrode coating thinning area of any one of the first aspects.
  • the present application also provides a computer program product, comprising a computer program/instruction, which, when executed by a processor, is used to execute the steps in the method for determining the boundary of the electrode coating thinning area of any one of the first aspects.
  • the initial positive and negative electrode capacity ratio of the target electrode piece is determined according to the initial contour curve, and when the initial positive and negative electrode capacity ratio meets the conditions, the initial contour curve is used as the boundary of the coating thinning area of the electrode piece. Since the initial contour curve quantitatively characterizes the contour of the thinning area, and the boundary of the coating thinning area is determined based on the initial contour curve, the accuracy of the boundary design of the coating thinning area is ensured, and the positive and negative electrode capacity ratio is used for rationality verification, which improves the rationality of the boundary design of the coating thinning area, thereby improving the electrical performance and safety performance of the battery cell.
  • FIG1 is a schematic flow chart of some embodiments of a method for determining the boundary of a pole piece coating thinning area provided in an embodiment of the present application;
  • FIG2 is a schematic diagram of a target pole piece provided in an embodiment of the present application.
  • FIG3 is a schematic diagram of a set of contour curves provided in an embodiment of the present application.
  • FIG4 is a schematic flow chart of some embodiments of a method for determining a boundary of a pole piece coating thinning area provided in an embodiment of the present application;
  • FIG5 is a schematic flow chart of some embodiments of a method for determining the boundary of a pole piece coating thinning area provided in an embodiment of the present application;
  • FIG6 is a schematic flow chart of some embodiments of a method for determining the boundary of a pole piece coating thinning area provided in an embodiment of the present application;
  • FIG7 is a schematic structural diagram of some embodiments of a device for determining a boundary of a pole piece coating thinning area provided in an embodiment of the present application;
  • FIG8 is a schematic structural diagram of some embodiments of electronic devices provided in the embodiments of the present application.
  • the width and thickness difference between the starting point of the coating thinning area and the end point of the material area are used as the boundary of the coating thinning area to ensure that there is no thick edge at the edge of the electrode (thick edge can be understood as the thickness of the electrode edge is greater than the material area), no powder loss (edge thinning transition is smooth), and no process abnormalities.
  • the method of determining the boundary of the coating thinning area causes the design standard of the coating thinning area to be too wide and cannot effectively verify the rationality of the boundary design of the coating thinning area, resulting in insufficient or excessive thinning during the production process. Therefore, the present application proposes a method, device, electronic device and computer storable medium for determining the boundary of the electrode coating thinning area to improve the rationality of the boundary design of the coating thinning area and improve the electrical performance and safety performance of the battery cell.
  • a flow chart of an embodiment of a method for determining the boundary of a pole piece coating thinning area in an embodiment of the present application is provided.
  • the method for determining the boundary of a pole piece coating thinning area can be performed by a screening and judgment device for poor battery pole piece coating.
  • the device for determining the boundary of a pole piece coating thinning area can be integrated into an electronic device.
  • the device for determining the boundary of a pole piece coating thinning area can be implemented by software and/or hardware.
  • the method for determining the boundary of a pole piece coating thinning area includes:
  • contour curve set includes multiple contour curves constituting multiple thinned area morphology profiles.
  • the target electrode can be a lithium-ion battery cell electrode, wherein the battery cell electrode is composed of a positive electrode and a negative electrode.
  • the target electrode includes a coating thinning area and a material area, that is, the positive electrode and the negative electrode both contain corresponding coating thinning areas and material areas, wherein the coating thinning area refers to the area where the coating process and thinning treatment are performed.
  • the initial coating thinning area in this embodiment is a thinning area with a qualified electrode edge, which can be determined by detecting the edge of a given original thinning area, or by obtaining a data sample library of qualified electrode edges, comparing the data corresponding to the original thinning area with the data sample library, and thus screening out the thinning area with a qualified electrode edge as the initial coating thinning area.
  • the initial contour curve is a curve corresponding to the contour of the initial coating thinning area, that is, the boundary of the initial coating thinning area.
  • A1 is the material area
  • A2 is the morphological profile of the thinning area.
  • the initial contour curve is at least one contour curve that constitutes a thinning area morphological profile, wherein the contour curves that constitute a thinning area morphological profile can be one, two, or more than two, as long as they can constitute the thinning area morphological profile.
  • a contour curve can be pre-selected, and the selected contour curve and a contour curve in the contour curve set constitute a thinning area morphological profile.
  • two contour curves with the largest enclosed area can be selected as initial contour curves from the multiple contour curves that constitute the contours of multiple thinning areas.
  • the two contour curves include an initial upper limit contour curve and an initial lower limit contour curve.
  • the area between the initial upper limit contour curve and the lower limit contour curve is larger than the area between the two contour curves that constitute any thinning area contour.
  • L1, L2, L3 and L4 are contour curves, among which L1 and L4 have the largest enclosed area, L1 is the initial upper limit contour curve, and L4 is the initial lower limit contour curve.
  • step 101 it also includes: determining the initial coating thinning area of the target electrode; performing scanning tests on the initial coating thinning area and the material area in the target electrode, and measuring multiple groups of widths of the initial coating thinning areas and thicknesses of the material areas; based on the multiple groups of widths of the initial coating thinning areas and thicknesses of the material areas, curve fitting is performed with width as the independent variable and thickness as the dependent variable to obtain a set of contour curves.
  • the original thinning area of the target electrode can be obtained based on manual experience, and then the edge of the original thinning area can be detected to screen out the original thinning area with qualified electrode edge as the initial coating thinning area.
  • the initial coating thinning area of the target electrode can also be stored in the terminal memory in advance to directly obtain the initial coating thinning area.
  • the material area and the initial coating thinning area of the target electrode are scanned horizontally at a certain speed, and each data point is spaced 0.5mm ⁇ 1mm apart to measure the thickness data of the electrode along the width direction, that is, the width of the initial coating thinning area (with b representing the width) and the thickness of the material area (with h representing the thickness) are obtained.
  • the contour of the initial coating thinning area is quantitatively characterized, which overcomes the problem of inaccurate contour of the initial coating thinning area based on empirical values in traditional schemes.
  • it realizes the digital characterization of the contour of the initial coating thinning area in principle, determines the initial contour curve by continuous function fitting, and improves the accuracy of the initial contour curve, so that the accuracy of the boundary of the coating thinning area of the target electrode can be improved based on the initial contour curve in the future.
  • the cell balance also known as N/P (Negative/Positive) is the ratio of the negative electrode active material capacity to the positive electrode active material capacity in the same stage and under the same conditions.
  • the area of the target electrode sheet that does not include the initial coating thinning area is the material area.
  • the material area is divided into the positive electrode material area and the negative electrode material area.
  • the material area area density, active material capacity in grams, and active material content percentage corresponding to the positive electrode material area, as well as the material area area density, active material capacity in grams, and active material content percentage corresponding to the negative electrode material area, are predetermined during the battery preparation process and are all known quantities.
  • the initial positive and negative electrode capacity ratio, CB is calculated as follows:
  • the negative electrode surface density of the negative electrode plate can be calculated by the material area surface density and the initial contour curve of the negative electrode material area
  • the positive electrode surface density of the positive electrode plate can be calculated by the material area surface density and the initial contour curve of the positive electrode material area
  • the negative electrode surface density and the positive electrode surface density are calculated based on the material area surface density and the initial contour curve corresponding to the positive electrode material area and the negative electrode material area respectively, and the initial positive and negative electrode capacity ratio corresponding to the target plate can be determined.
  • step 102 includes: determining the surface density of the target electrode according to the surface density of the material area corresponding to the material area and the initial contour curve; and determining the initial positive and negative electrode capacity ratio according to the surface density of the target electrode.
  • the surface density of the target electrode is determined based on the surface density of the material area corresponding to the material area and the initial contour curve. After the surface density of the target electrode is determined, the initial positive and negative electrode capacity ratio can be determined based on the surface density of the target electrode.
  • the target electrode sheet includes a positive electrode sheet and a negative electrode sheet
  • the material area in the target electrode sheet that does not contain the initial coating thinning area includes the positive electrode material area in the positive electrode sheet and the negative electrode material area in the negative electrode sheet
  • the material area surface density includes the material area surface density corresponding to the positive electrode material area and the negative electrode material area
  • step 102 includes 102A-102B.
  • the negative electrode surface density is the sum of the surface density of the material area corresponding to the negative electrode material area and the surface density corresponding to the negative electrode thinning area
  • the positive electrode surface density is the sum of the surface density of the material area corresponding to the negative electrode material area and the surface density corresponding to the positive electrode thinning area.
  • the calculation formulas for the positive electrode areal density and the negative electrode areal density are as follows:
  • the surface density corresponding to the negative electrode thinning area can be calculated by the initial contour curve and the material area surface density corresponding to the negative electrode material area
  • the surface density corresponding to the positive electrode thinning area can be calculated by the initial contour curve and the material area surface density corresponding to the positive electrode material area, therefore, the positive electrode surface density and the negative electrode surface density can be determined based on the material area surface densities corresponding to the positive electrode material area and the negative electrode material area, and the initial contour curve.
  • the initial coating thinning area includes the positive electrode thinning area corresponding to the positive electrode sheet and the negative electrode thinning area corresponding to the negative electrode sheet; step 102A includes steps 102A1 - 102A4 .
  • the surface density of the material area in the initial coating thinning area can be calculated based on the known surface density of the material area. According to the corresponding proportional relationship between the coating height, coating length, initial coating thinning area width and material area thickness, it can be converted into the ratio of the surface area to the cross-sectional area of the initial coating thinning area. ; (4)
  • b is represented by the width of the initial coating thinning area, Expressed as the thickness of the material area, Expressed as the surface density of the initial coating thinning area, Expressed as the surface density of the material area, Expressed as the density of the target pole piece, Expressed as the cross-sectional area of the initial coating thinning zone, Expressed as the cross-sectional area of the material zone, Expressed as the surface area of the initial coating thinning zone, , Expressed as the surface area of the material zone, It is represented as the length of the target electrode, and b is the width of the initial coating thinning area.
  • the initial coating thinning area includes the positive electrode thinning area and the negative electrode thinning area.
  • the above formula can be Replace with , Replace with , Replace with ,For example: Where, Expressed as the width of the positive electrode thinning area, Expressed as the thickness of the positive electrode material area, Expressed as the surface density of the positive electrode thinning area, Expressed as the surface density of the positive electrode material area, Expressed as the cross-sectional area of the positive electrode thinning area.
  • the surface density of the positive electrode thinning zone corresponding to the positive electrode material zone can be determined based on the surface density of the material zone corresponding to the positive electrode material zone and the initial contour curve.
  • the surface density of the positive electrode thinning zone corresponding to the negative electrode thinning zone can be determined based on the surface density of the material zone corresponding to the negative electrode material zone and the initial contour curve.
  • the initial contour curve includes a negative electrode contour curve corresponding to the negative electrode thinning area; based on the material area surface density corresponding to the negative electrode material area and the initial contour curve, the negative electrode thinning area surface density corresponding to the negative electrode thinning area is determined, including: determining the negative electrode cross-sectional area corresponding to the negative electrode thinning area based on the negative electrode contour curve; determining the negative electrode thinning area surface density based on the negative electrode contour curve, the negative electrode cross-sectional area, and the material area surface density corresponding to the negative electrode material area.
  • the initial profile curve includes a positive electrode profile curve corresponding to the positive electrode thinning area, and step 102A1 includes steps 102A11 - 102A12 .
  • step 102A11 includes: performing integral calculation on the positive electrode contour curve to obtain the positive electrode cross-sectional area.
  • the initial contour curve also includes a negative electrode contour curve corresponding to the negative electrode thinning area.
  • the initial contour curve Including the positive electrode contour curve corresponding to the positive electrode thinning area Negative electrode contour curve corresponding to the negative electrode thinning area .
  • the cross-sectional area of the initial coating thinning area is the initial profile curve
  • step 102A12 includes: obtaining the interval endpoint value corresponding to the independent variable in the positive electrode contour curve; determining the interval endpoint value corresponding to the dependent variable in the positive electrode contour curve based on the interval endpoint value corresponding to the independent variable in the positive electrode contour curve; determining the width of the initial coating thinning area and the thickness of the positive electrode material area based on the interval endpoint values corresponding to the independent variable and the dependent variable in the positive electrode contour curve, and obtaining the width value corresponding to the positive electrode coating thinning area and the thickness value corresponding to the positive electrode material area; determining the surface density of the positive electrode thinning area according to the product of the thickness value corresponding to the positive electrode coating thinning area and the width value corresponding to the positive electrode material area, the surface density of the material area corresponding to the positive electrode material area and the positive electrode cross-sectional area.
  • the surface density of the negative electrode thinning area is determined based on the negative electrode contour curve, the negative electrode cross-sectional area, and the material area surface density corresponding to the negative electrode material area, including: obtaining the interval endpoint value corresponding to the independent variable in the negative electrode contour curve; determining the interval endpoint value corresponding to the dependent variable in the negative electrode contour curve based on the interval endpoint value corresponding to the independent variable in the negative electrode contour curve; determining the width of the negative electrode thinning area and the thickness of the negative electrode material area based on the interval endpoint values corresponding to the independent variable and the dependent variable in the negative electrode contour curve, and obtaining the width value corresponding to the negative electrode coated thinning area and the thickness value corresponding to the negative electrode material area; determining the surface density of the negative electrode thinning area according to the product of the thickness value corresponding to the negative electrode coated thinning area and the width value corresponding to the negative electrode material area, the material area surface density corresponding to the negative electrode material area, and the negative electrode cross-sectional area
  • the calculation formula of the surface density of the negative electrode thinning area is as follows:
  • the positive electrode surface density is the sum of the surface density of the positive electrode thinning area and the surface density of the material area corresponding to the positive electrode material area, that is:
  • the negative electrode surface density is the sum of the surface density of the negative electrode thinning area and the surface density of the material area corresponding to the negative electrode material area, that is:
  • the initial positive and negative electrode capacity ratio is determined according to the active material gram capacity, active material content percentage, positive electrode areal density and negative electrode areal density corresponding to each of the positive electrode material area and the negative electrode material area.
  • the initial positive and negative electrode capacity ratio CB can be calculated.
  • the calculation formula for the initial positive and negative electrode capacity ratio is as follows:
  • the initial positive and negative electrode capacity ratio can be calculated based on the initial contour curve. Since the initial contour curve is more accurate, the initial positive and negative electrode capacity ratio is also more accurate, thereby improving the accuracy of the calculation of the initial positive and negative electrode capacity ratio.
  • the initial contour curve includes the initial upper limit contour curve and the initial lower limit profile curve, for the positive electrode profile curve, including the positive upper limit profile curve and the positive lower limit contour curve ;
  • the negative electrode contour curve including the negative upper limit contour curve and negative lower limit contour curve
  • the initial contour curve is determined as the boundary of the initial coating thinning area.
  • the preset positive-to-negative electrode capacity ratio is a preset positive-to-negative electrode capacity ratio threshold value used to determine whether the initial coating thinning area is accurate.
  • the preset positive-to-negative electrode capacity ratio CB0 includes a lower limit value CB0min and an upper limit value CB0max of the positive-to-negative electrode capacity ratio.
  • the initial contour curve is determined as the boundary of the initial coating thinning area, thereby realizing the determination of the boundary of the coating thinning area of the target electrode.
  • the method also includes: if the initial positive and negative electrode capacity ratio does not meet the preset positive and negative electrode capacity ratio, then from the contour curve set corresponding to the initial coated thinning area of the target electrode, obtaining at least one contour curve constituting the morphological contour of the next thinning area as the initial contour curve, until the boundary of the initial coated thinning area is determined.
  • the initial positive-negative electrode capacity ratio does not meet the preset positive-negative electrode capacity ratio
  • at least one contour curve constituting the morphological contour of the next thinning area is obtained as the initial contour curve from the contour curve set corresponding to the initial coated thinning area of the target electrode
  • the step of determining the initial positive-negative electrode capacity ratio corresponding to the target electrode according to the material area surface density corresponding to the material area in the target electrode and the initial contour curve is executed until the boundary of the initial coated thinning area is obtained.
  • the initial contour curve needs to be adjusted to obtain at least one contour curve constituting a thinning area profile as the initial contour curve, and continue to determine the corresponding initial positive-to-negative electrode capacity ratio.
  • the original contour curve set can be narrowed, that is, the initial upper limit contour curve or the lower limit contour curve is deleted, and the initial contour curve is determined in the remaining contour curve set to obtain an updated initial contour curve.
  • steps 102-103 is repeated until the initial positive-to-negative electrode capacity ratio corresponding to the updated initial contour curve meets the preset positive-to-negative electrode capacity ratio, and the updated initial contour curve is determined as the boundary of the initial coating thinning area, thereby obtaining the boundary of the initial coating thinning area.
  • the laser profiler detection equipment scans at a certain speed, and measures the thickness data of the material area and the thinned area of the positive and negative electrode sheets of the battery at intervals of 0.5 mm.
  • the fitting function h(x) ax4+bx3+cx2+dx+e is used.
  • the upper and lower limit contour curves of the coating thinning area of the negative electrode sheet and the upper and lower limit contour curves of the coating thinning area of the positive electrode sheet can be used as the boundary models of the control standard of the positive and negative electrode sheets of this product model.
  • the above-mentioned method for determining the boundary of the electrode coating thinning area obtains the initial contour curve corresponding to the initial coating thinning area of the electrode, determines the initial positive and negative electrode capacity ratio of the target electrode according to the initial contour curve, and when the initial positive and negative electrode capacity ratio meets the conditions, uses the initial contour curve as the boundary of the electrode coating thinning area.
  • the initial contour curve quantitatively characterizes the contour of the thinning area and the boundary of the coating thinning area is determined based on the initial contour curve, the accuracy of the boundary design of the coating thinning area is ensured, and the initial positive and negative electrode capacity ratio is used for rationality verification, thereby improving the rationality of the boundary design of the coating thinning area, thereby improving the electrical performance and safety performance of the battery cell.
  • the embodiment of the present application further provides a device 200 for determining the boundary of a pole piece coating thinning area.
  • the device 200 comprises:
  • An acquisition module 201 is configured to acquire, from a set of contour curves corresponding to an initial coated thinning area of a target electrode, at least one contour curve constituting a profile of a thinning area as an initial contour curve, wherein the contour curve set includes a plurality of contour curves constituting a plurality of profiles of thinning areas;
  • a first determining module 202 is configured to determine an initial positive-to-negative electrode capacity ratio corresponding to a target electrode piece based on a material area surface density and an initial contour curve corresponding to a material area in the target electrode piece;
  • the second determining module 203 is configured to determine the initial contour curve as the boundary of the initial coating thinning area if the initial positive-to-negative electrode capacity ratio satisfies a preset positive-to-negative electrode capacity ratio.
  • the apparatus further comprises:
  • the third determination module is used to obtain at least one contour curve constituting the morphological contour of the next thinning area from the contour curve set corresponding to the initial coated thinning area of the target electrode as the initial contour curve if the initial positive-negative electrode capacity ratio does not meet the preset positive-negative electrode capacity ratio, until the boundary of the initial coated thinning area is determined.
  • the apparatus further comprises:
  • a fourth determination module is used to determine an initial coating thinning area of a target electrode
  • the test module is used to scan and test the initial coating thinning area and the material area in the target electrode, and measure the width of multiple sets of initial coating thinning areas and the thickness of the material area;
  • the fitting module is used to perform curve fitting based on multiple sets of initial coating thinning area widths and material area thicknesses, with width as the independent variable and thickness as the dependent variable, to obtain a set of contour curves.
  • the first determining module 202 is further configured to:
  • the initial positive and negative electrode capacity ratio is determined based on the target electrode surface density.
  • the target electrode sheet includes a positive electrode sheet and a negative electrode sheet
  • the material area in the target electrode sheet includes a positive electrode material area in the positive electrode sheet and a negative electrode material area in the negative electrode sheet
  • the material area surface density includes the material area surface density corresponding to the positive electrode material area and the negative electrode material area
  • the first determination module 202 is further specifically used to:
  • the initial positive and negative electrode capacity ratio is determined based on the positive electrode surface density and the negative electrode surface density.
  • the initial coating thinning area includes a positive electrode thinning area corresponding to the positive electrode sheet and a negative electrode thinning area corresponding to the negative electrode sheet; the first determining module 202 is further configured to:
  • Determining the positive electrode areal density based on the positive electrode thinning area areal density and the material area areal density corresponding to the positive electrode material area;
  • the negative electrode areal density is determined based on the negative electrode thinning area areal density and the material area areal density corresponding to the negative electrode material area.
  • the initial profile curve includes a positive electrode profile curve corresponding to the positive electrode thinning area; the first determining module 202 is further configured to:
  • the surface density of the positive electrode thinning area is determined based on the positive electrode contour curve, the positive electrode cross-sectional area, and the material area surface density corresponding to the positive electrode material area.
  • the first determining module 202 is further configured to:
  • the positive electrode profile curve is integrated to obtain the positive electrode cross-sectional area.
  • the first determining module 202 is further configured to:
  • the width of the positive electrode thinning area and the thickness of the positive electrode material area are determined to obtain the width value corresponding to the positive electrode coating thinning area and the thickness value corresponding to the positive electrode material area;
  • the surface density of the positive electrode thinning area is determined according to the product of the thickness value and the width value, the surface density of the material area corresponding to the positive electrode material area, and the positive electrode cross-sectional area.
  • the present application also provides an electronic device that integrates any one of the electrode coating thinning area boundary determination devices provided in the present application.
  • the electronic device includes:
  • processors one or more processors
  • One or more applications wherein the one or more applications are stored in a memory and configured to be executed by a processor, the method for determining the boundary of the pole piece coating thinning area in any of the above-mentioned embodiments of the method for determining the boundary of the pole piece coating thinning area.
  • the present application also provides an electronic device that integrates any of the electrode coating thinning area boundary determination devices provided in the present application. As shown in FIG8 , it shows a schematic diagram of the structure of the electronic device involved in the present application embodiment, specifically:
  • the electronic device may include components such as a processor 301 with one or more processing cores, a memory 302 with one or more computer-readable storage media, a power supply 303, and an input unit 304.
  • a processor 301 with one or more processing cores
  • a memory 302 with one or more computer-readable storage media
  • a power supply 303 with one or more computer-readable storage media
  • an input unit 304 may be included in the electronic device.
  • FIG8 does not limit the electronic device and may include more or fewer components than shown, or combine certain components, or arrange the components differently.
  • the processor 301 is the control center of the electronic device. It connects all parts of the electronic device using various interfaces and lines. By running or executing software programs and/or modules stored in the memory 302 and accessing data stored in the memory 302, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole.
  • the processor 301 may include one or more processing cores; preferably, the processor 301 may integrate an application processor and a modem processor, wherein the application processor primarily processes the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into the processor 301.
  • Memory 302 can be used to store software programs and modules.
  • Processor 301 executes various functional applications and data processing by running the software programs and modules stored in memory 302.
  • Memory 302 may primarily include a program storage area and a data storage area.
  • the program storage area may store an operating system and at least one application required for a function (such as sound playback or image playback); the data storage area may store data generated based on the use of the electronic device.
  • Memory 302 may also include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, memory 302 may also include a memory controller to provide processor 301 with access to memory 302.
  • the electronic device also includes a power supply 303 for supplying power to various components.
  • the power supply 303 can be logically connected to the processor 301 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption.
  • the power supply 303 can also include one or more DC or AC power supplies, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and other arbitrary components.
  • the electronic device may further include an input unit 304, which may be configured to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
  • an input unit 304 which may be configured to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
  • the electronic device may further include a display unit, etc., which will not be described in detail here.
  • the processor 301 in the electronic device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302 to implement various functions as follows:
  • At least one contour curve constituting a profile of a thinned area is obtained from a set of contour curves corresponding to an initially coated thinned area of a target electrode as an initial contour curve, wherein the set of contour curves includes a plurality of contour curves constituting a plurality of profiles of the thinned areas;
  • the initial contour curve is determined as the boundary of the initial coating thinning area.
  • an embodiment of the present application provides a computer-readable storage medium, which can be non-volatile or volatile, and can include: read-only memory (ROM), random access memory (RAM), a disk, or an optical disk.
  • ROM read-only memory
  • RAM random access memory
  • a computer program is stored thereon, and the computer program is loaded by a processor to execute the steps of any of the methods for determining the boundary of a thinned electrode coating area provided in the embodiments of the present application.
  • the computer program loaded by the processor can execute the following steps:
  • At least one contour curve constituting a profile of a thinned area is obtained from a set of contour curves corresponding to an initially coated thinned area of a target electrode as an initial contour curve, wherein the set of contour curves includes a plurality of contour curves constituting a plurality of profiles of the thinned areas;
  • the initial contour curve is determined as the boundary of the initial coating thinning area.
  • An embodiment of the present application also provides a computer program product, including a computer program/instruction, which, when executed by a processor, is used to execute the steps in any one of the methods for determining the boundary of a pole piece coating thinning area provided in the embodiment of the application.

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Abstract

本申请提供一种极片涂布削薄区的边界确定方法、装置、电子设备及介质，包括：从目标极片的初始涂布削薄区的轮廓曲线集合中，获取初始轮廓曲线，根据目标极片中料区的料区面密度和初始轮廓曲线，确定对应的初始正负极容量比值，若初始正负极容量比值满足预设正负极容量比值，确定初始轮廓曲线为初始涂布削薄区的边界。

Description

极片涂布削薄区的边界确定方法、装置、电子设备及介质
本申请要求在2024年4月7日提交中国专利局、申请号为202410410696.9的中国专利申请的优先权，以上申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池技术领域，具体涉及极片涂布削薄区的边界确定方法、装置、电子设备及介质。
 背景技术
在动力电池的生产加工过程中，通常需要对基材进行一系列处理，基材的加工处理过程通常由涂布、干燥等步骤组成。涂布是锂离子电池制造过程中的一个基础工序，通过将浆料涂布于箔材上以得到锂离子电池的正负极片。然而，在利用涂布制作电池极片时，为了避免极片的边缘出现异常，需要对极片边缘进行削薄处理，而极片中进行削薄处理的区域即为涂布削薄区，在涂布过程中，如果因浆料的表面张力等因素导致厚边、鼓边，将会直接影响干燥后的膜片的质量以及基材后续的加工过程。
 发明概述
相关技术中，极片涂布削薄区的边界的设定方式是直接凭借经验值确定，无法确保极片涂布削薄区的边界的准确性，容易存在极片涂布边缘削薄区不够或过多等情况，这种方式使得极片涂布削薄区的边界设计不合理，影响电芯的极片边缘析锂较多或嵌锂不足，不利于提高电芯电性能及安全性能。
第一方面，本申请的实施例提供了一种极片涂布削薄区的边界确定方法，极片涂布削薄区的边界确定方法包括：
从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值；
若初始正负极容量比值满足预设正负极容量比值，则将初始轮廓曲线确定为初始涂布削薄区的边界。
第二方面，本申请的实施例提供了一种极片涂布削薄区的边界确定装置，极片涂布削薄区的边界确定装置包括：
获取模块，用于从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
第一确定模块，用于根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值；
第二确定模块，用于若初始正负极容量比值满足预设正负极容量比值，则将初始轮廓曲线确定为初始涂布削薄区的边界。
第三方面，本申请的实施例提供了一种电子设备，电子设备包括：
一个或多个处理器；
存储器；以及
一个或多个应用程序，其中一个或多个应用程序被存储于存储器中，并配置为由处理器执行以实现第一方面任一项的极片涂布削薄区的边界确定方法中的步骤。
第四方面，本申请还提供一种计算机可读存储介质，其上存储有计算机程序，计算机程序被处理器进行加载，以执行第一方面任一项的极片涂布削薄区的边界确定方法中的步骤。
第五方面，本申请还提供一种计算机程序产品，包括计算机程序/指令，该计算机程序/指令被处理器执行时其用于执行第一方面任一项的极片涂布削薄区的边界确定方法中的步骤。
有益效果
本申请的实施例的有益效果：
在本申请的实施例中，通过获取极片的初始涂布削薄区对应的初始轮廓曲线，根据初始轮廓曲线确定目标极片的初始正负极容量比值，在初始正负极容量比值满足条件时，将初始轮廓曲线作为极片的涂布削薄区的边界，由于初始轮廓曲线定量表征削薄区轮廓，且基于初始轮廓曲线进行涂布削薄区的边界的确定依据，确保了涂布削薄区的边界设计的准确性，并且采用正负极容量比值进行合理性验证，提高了涂布削薄区的边界设计的合理性，从而提高了电芯电性能及安全性能。
 附图说明
图1是本申请的实施例提供的极片涂布削薄区的边界确定方法的一些实施例流程示意图；
图2是本申请实施例中提供的目标极片的示意图；
图3是本申请实施例中提供轮廓曲线集合示意图；
图4是本申请的实施例提供的极片涂布削薄区的边界确定方法的一些实施例流程示意图；
图5是本申请的实施例提供的极片涂布削薄区的边界确定方法的一些实施例流程示意图；
图6是本申请的实施例提供的极片涂布削薄区的边界确定方法的一些实施例流程示意图；
图7是本申请实施例中提供的极片涂布削薄区的边界确定装置的一些实施例结构示意图；
图8是本申请实施例中提供的电子设备的一些实施例结构示意图。
 本发明的实施方式
目前大部分极片涂布削薄区的标准设定大多是凭借经验值，结合电芯极片的垫片供应商的实际验证结果制订标准，通常以涂布削薄区起点和料区终点的宽度、厚度差作为涂布削薄区的边界，保证极片边缘处不厚边(厚边可以理解为极片边缘厚度大于料区)、不掉粉(边缘削薄过渡平滑)等无制程异常问题即可，该涂布削薄区的边界的确定方式导致涂布削薄区设计标准过宽且无法有效验证涂布削薄区的边界设计的合理性，导致在生产过程中经常出现削薄不够或削薄过多的情况。因此，本申请提出了一种极片涂布削薄区的边界确定方法、装置、电子设备和计算机可存储介质，以提高涂布削薄区的边界设计的合理性，提高电芯电性能及安全性能。
如图1所示，为本申请实施例中极片涂布削薄区的边界确定方法的一个实施例流程示意图，该极片涂布削薄区的边界确定方法可以由电池极片不良涂布的筛选判定装置执行，该极片涂布削薄区的边界确定装置可以集成于电子设备中，该极片涂布削薄区的边界确定装置可以由软件和/或硬件实现。该极片涂布削薄区的边界确定方法包括：
101、从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线。
其中，目标极片可以是锂离子电池电芯极片，其中，电池电芯极片是由正极极片与负极极片组成。目标极片包括涂布削薄区和料区，也即正极极片和负极极片均包含对应的涂布削薄区和料区，其中的涂布削薄区是指进行涂布工艺和削薄处理的区域。本实施例中的初始涂布削薄区为极片边缘合格的削薄区，其可以通过对给定的原始削薄区的边缘进行检测确定，也可以是获取极片边缘合格的数据样本库，将原始削薄区对应的数据与数据样本库进行比对，从而筛选出极片边缘合格的削薄区作为初始涂布削薄区。
初始轮廓曲线是表征初始涂布削薄区的轮廓对应的曲线，也即初始涂布削薄区的边界。如图2所示，为目标极片的示意图，A1为料区区域，A2为削薄区形貌轮廓。初始轮廓曲线为构成一个削薄区形貌轮廓的至少一条轮廓曲线，其中，构成一个削薄区形貌轮廓的轮廓曲线可以是一条、两条或者两条以上，只要能够构成削薄区形貌轮廓即可，对于一条轮廓曲线的情形，可以是预先选取一条轮廓曲线，该选取的轮廓曲线和轮廓曲线集合中的一条轮廓曲线构成一个削薄区形貌轮廓。作为本实施例的优选，可以从构成多个削薄区形貌轮廓的多条轮廓曲线中，选取包围面积最大的两条轮廓曲线作为初始轮廓曲线，其中的两条轮廓曲线包括初始上限轮廓曲线和初始下限轮廓曲线，初始上限轮廓曲线和下限轮廓曲线之间的区域面积大于构成任意一个削薄区形貌轮廓的两条轮廓曲线之间的区域面积，如此，可以保证最先确定的初始涂布削薄区的边界的范围最大，以提高初始涂布削薄区的边界的效率。如图3所示，为轮廓曲线集合示意图，L1、L2、L3和L4为轮廓曲线，其中，L1和L4包围的面积最大，L1为初始上限轮廓曲线，L4为初始下限轮廓曲线。
具体地，在步骤101之前，还包括：确定目标极片的初始涂布削薄区；对初始涂布削薄区和目标极片中的料区进行扫描测试，测得多组初始涂布削薄区的宽度与料区的厚度；基于多组初始涂布削薄区的宽度与料区的厚度，以宽度为自变量，厚度为因变量进行曲线拟合，得到轮廓曲线集合。
具体而言，可以根据人工经验获取目标极片的原始削薄区，然后对原始削薄区的边缘进行检测，筛选出极片边缘合格的原始削薄区作为初始涂布削薄区，也可以预先在终端的存储器中存储目标极片的初始涂布削薄区，直接获取到初始涂布削薄区。然后，通过在线检测设备，如通过激光轮廓测试仪以一定的速度横向扫描目标极片的料区及初始涂布削薄区，每个数据点间隔0.5mm~1mm，测得极片沿宽度方向的厚度数据，即得到初始涂布削薄区的宽度（用b表示宽度）与料区的厚度（用h表示厚度），然后，以宽度b为自变量，厚度h为因变量进行曲线拟合，得到多条轮廓曲线b=h(x)，将轮廓曲线集合中构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线。
可以理解地，本实施例中，通过测得极片边缘合格的初始涂布削薄区的连续宽度数据和料区的厚度数据，定量表征初始涂布削薄区的轮廓，克服了传统方案中依据经验值导致初始涂布削薄区轮廓不准确的问题，同时实现了从原理上数据化表征初始涂布削薄区的轮廓，通过连续函数拟合确定初始轮廓曲线，提高了初始轮廓曲线的准确性，以便后续基于初始轮廓曲线提高目标极片的涂布削薄区的边界的准确性。
102、根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值。
其中，正负极容量比值（cell Balance，CB值），也称为N/P (Negative/Positive)，是在同一阶段内，同一条件下，负极活性物质容量与正极活性物质容量的比值。
目标极片中不含初始涂布削薄区的区域即为料区，料区分为正极料区和负极料区，即正极极片中的料区为正极料区，负极极片中的料区为负极料区。正极料区对应的料区面密度、活性物质克容量、活性物质含量百分比以及负极料区对应的料区面密度、活性物质克容量、活性物质含量百分比在电池制备过程中已预先确定，均为已知量。
在一个具体实施方式中，初始正负极容量比值，即CB的计算公式为：
；（1）
公式（1）中， 表示为负极极片的负极面密度、 表示为负极料区的活性物质克容量、 表示为负极料区的活性物质含量百分比， 表示为正极极片的正极面密度、 表示为正极料区的活性物质克容量、 表示为正极料区的活性物质含量百分比。
由于负极极片的负极面密度可以通过负极料区的料区面密度和初始轮廓曲线计算得到，正极极片的正极面密度可以通过正极料区的料区面密度和初始轮廓曲线计算得到，因此，本实施例中，根据正极料区和负极料区各自对应的料区面密度和初始轮廓曲线计算得到负极面密度和正极面密度，即可确定目标极片对应的初始正负极容量比值。
具体地，步骤102，包括：根据料区对应的料区面密度和初始轮廓曲线确定目标极片的面密度；根据目标极片的面密度确定初始正负极容量比值。
具体而言，根据料区对应的料区面密度和初始轮廓曲线确定目标极片的面密度，在确定了目标极片的面密度后，根据目标极片的面密度即可确定初始正负极容量比值。
具体地，如图4所示，目标极片包括正极极片和负极极片，目标极片中不含初始涂布削薄区的料区包括正极极片中的正极料区和负极极片中的负极料区，料区面密度包括正极料区和负极料区各自对应的料区面密度；步骤102，包括102A-102B。
102A、根据正极料区对应的料区面密度、以及初始轮廓曲线确定正极极片对应的正极面密度，并根据负极料区对应的料区面密度、以及初始轮廓曲线确定负极极片对应的负极面密度。
其中，负极面密度为负极料区对应的料区面密度与负极削薄区对应的面密度之和，正极面密度为负极料区对应的料区面密度与正极削薄区对应的面密度之和。
在一个具体实施方式中，正极面密度和负极面密度的计算公式如下：
；（2）
；（3）
公式（2）和（3）中， 表示为负极料区对应的料区面密度， 表示为负极削薄区对应的面密度， 表示为正极料区对应的料区面密度， 表示为正极削薄区对应的面密度。
由于负极削薄区对应的面密度可以通过初始轮廓曲线和负极料区对应的料区面密度计算得到，正极削薄区对应的面密度可以通过初始轮廓曲线和正极料区对应的料区面密度计算得到，因此，可以根据正极料区和负极料区各自对应的料区面密度、以及初始轮廓曲线确定正极面密度和负极面密度。
具体地，如图5所示，初始涂布削薄区包括正极极片对应的正极削薄区和负极极片对应的负极削薄区；步骤102A，包括102A1-102A4。
102A1、基于正极料区对应的料区面密度和初始轮廓曲线，确定正极削薄区对应的正极削薄区面密度。
具体而言，初始涂布削薄区的料区面密度可以通过已知的料区的面密度进行计算，根据涂膜高度、涂膜长度、初始涂布削薄区宽度与料区厚度上对应的比例关系，换算为初始涂布削薄区的表面积与截面积之比 ；（4）
公式（4）中， 表示为目标极片的长度，b表示为初始涂布削薄区的宽度， 表示为料区的厚度， 表示为初始涂布削薄区的面密度， 表示为料区的料区面密度， 表示为目标极片的密度， 表示为初始涂布削薄区的截面积， 表示为料区的截面积， 表示为初始涂布削薄区的表面积， ， 表示为料区的表面积， 表示为目标极片的长度，b为初始涂布削薄区的宽度。
将 代入上述公式（4）进行变换处理，可知， 。
初始涂布削薄区包括正极削薄区和负极削薄区，对于正极削薄区面密度，可以将上述公式中的 替换为 ， 替换为 ， 替换为 ，例如： ；式中， 表示为正极削薄区的宽度， 表示为正极料区的厚度， 表示为正极削薄区的面密度， 表示为正极料区的料区面密度， 表示为正极削薄区的截面积。
由于初始涂布削薄区的截面积可以根据初始轮廓函数计算得到，因此，基于正极料区对应的料区面密度和初始轮廓曲线，即可确定正极削薄区对应的正极削薄区面密度，同理，基于负极料区对应的料区面密度和初始轮廓曲线，即可确定负极削薄区对应的正极削薄区面密度。
具体地，初始轮廓曲线包括负极削薄区对应的负极轮廓曲线；基于负极料区对应的料区面密度和初始轮廓曲线，确定负极削薄区对应的负极削薄区面密度，包括：基于负极轮廓曲线确定负极削薄区对应的负极截面积；基于负极轮廓曲线、负极截面积、及负极料区对应的料区面密度确定负极削薄区面密度。
具体而言，对于负极削薄区面密度，可以将 公式中的 替换为 ， 替换为 ， 替换为 ，例如： ；式中， 表示为负极削薄区的宽度， 表示为负极料区的厚度， 表示为负极削薄区的面密度， 表示为负极料区的料区面密度， 表示为负极削薄区的截面积。
具体地，如图6所示，初始轮廓曲线包括正极削薄区对应的正极轮廓曲线，步骤102A1，包括102A11-102A12。
102A11、基于正极轮廓曲线确定正极削薄区对应的正极截面积。
具体地，步骤102A11包括：对正极轮廓曲线进行积分计算，得到正极截面积。
相应地，初始轮廓曲线还包括负极削薄区对应的负极轮廓曲线。
其中，初始轮廓曲线 包括正极削薄区对应的正极轮廓曲线 和负极削薄区对应的负极轮廓曲线 。
具体而言，初始涂布削薄区的截面积为初始轮廓曲线 的积分，即 。对于正极截面积，可以通过公式 计算得到。
相应地，对于负极截面积，可以通过公式 计算得到。
102A12、基于正极轮廓曲线、正极截面积、及正极料区对应的料区面密度确定正极削薄区面密度。
具体地，步骤102A12包括：获取正极轮廓曲线中自变量对应的区间端点值；基于正极轮廓曲线中自变量对应的区间端点值确定正极轮廓曲线中因变量对应的区间端点值；基于正极轮廓曲线中的自变量和因变量各自对应的区间端点值，确定初始涂布削薄区的宽度和正极料区的厚度，得到正极涂布削薄区对应的宽度值和正极料区对应的厚度值；根据正极涂布削薄区对应的厚度值与正极料区对应的宽度值的乘积、正极料区对应的料区面密度和正极截面积确定正极削薄区面密度。
具体而言，基于正极轮廓曲线中自变量对应的区间端点值，如[0, ]，将 代入正极轮廓曲线中计算得到对应的因变量如 ，从而获取到正极削薄区的宽度 和正极料区的厚度 。将正极截面积代入正极削薄区面密度的计算公式 中，即可计算得到 。
具体地，基于负极轮廓曲线、负极截面积、及负极料区对应的料区面密度确定负极削薄区面密度，包括：获取负极轮廓曲线中自变量对应的区间端点值；基于负极轮廓曲线中自变量对应的区间端点值确定负极轮廓曲线中因变量对应的区间端点值；基于负极轮廓曲线中自变量和因变量各自对应的区间端点值，确定负极削薄区的宽度和负极料区的厚度，得到负极涂布削薄区对应的宽度值和负极料区对应的厚度值；根据负极涂布削薄区对应的厚度值与负极料区对应的宽度值的乘积、负极料区对应的料区面密度和负极截面积确定负极削薄区面密度。
具体而言，基于负极轮廓曲线中自变量对应的区间端点值，如[0, ]，将 代入负极轮廓曲线中计算得到对应的因变量如 ，从而获取到负极削薄区的宽度 和负极料区的厚度 。将负极截面积代入负极削薄区面密度的计算公式 ，即可计算 。
102A2、基于负极料区对应的料区面密度和初始轮廓曲线，确定负极削薄区对应的负极削薄区面密度。
具体而言，由于负极削薄区面密度和正极削薄区面密度的计算方式一致，因此，负极削薄区面密度计算公式如下：
；（5）
公式（5）中， 表示为负极削薄区的宽度， 表示为负极料区的厚度，
表示为负极削薄区的面密度， 表示为 料区对应的料区面密度， 表示为负极削薄区的截面积。
102A3、基于正极削薄区面密度和基于正极料区对应的料区面密度确定正极面密度。
具体而言，正极面密度为正极削薄区面密度与正极料区对应的料区面密度之和，即：
102A4、基于负极削薄区面密度和负极料区对应的料区面密度确定负极面密度。
具体而言，与步骤102A3同理，负极面密度为负极削薄区面密度与负极料区对应的料区面密度之和，即：
102B、根据正极面密度和负极面密度确定初始正负极容量比值。
具体而言，在确定了正极面密度和负极面密度后，根据正极料区和负极料区各自对应的活性物质克容量、活性物质含量百分比、正极面密度和负极面密度确定初始正负极容量比值，即可计算初始正负极容量比值CB，初始正负极容量比值的计算公式如下：
;             （6）
可以理解地，本实施例中，根据初始轮廓曲线即可计算得到初始正负极容量比值，由于初始轮廓曲线较为准确，使得初始正负极容量比值也更为精准，提高了初始正负极容量比值计算的准确性。
需要说明的是，初始轮廓曲线包括初始上限轮廓曲线 和初始下限轮廓曲线，对于正极轮廓曲线，包括正极上限轮廓曲线 和正极下限轮廓曲线 ；对于负极轮廓曲线 ，包括负极上限轮廓曲线 和负极下限轮廓曲线 ，为了确保后续对初始正负极容量比值验证的准确性，可以计算出初始正负极容量比值的最大值CBmax和最小值CBmin：
；（7）
；（8）
103、若初始正负极容量比值满足预设正负极容量比值，则将初始轮廓曲线确定为初始涂布削薄区的边界。
其中，预设正负极容量比值为预先设定用于判定初始涂布削薄区是否准确的正负极容量比值阈值。本实施例中，包括预设正负极容量比值CB0包括正负极容量比值下限值CB0min和正负极容量比值上限值CB0max。
具体地，当初始正负极容量比值的最大值小于正负极容量比值上限值，且初始正负极容量比值的最小值大于正负极容量比值下限值，即CBmax<CB0max，且CBmin>CB0min，判定初始正负极容量比值满足预设正负极容量比值，表明初始轮廓曲线满足极片涂布工艺条件，因此，将初始轮廓曲线确定为初始涂布削薄区的边界，实现了对目标极片的涂布削薄区的边界的确定。
具体地，该方法还包括：若初始正负极容量比值不满足预设正负极容量比值，则从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成下一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，直至确定初始涂布削薄区的边界。
具体而言，若初始正负极容量比值不满足预设正负极容量比值，则从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成下一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，并执行根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值的步骤，直至获取初始涂布削薄区的边界为止。
更具体地，当初始正负极容量比值不满足预设正负极容量比值时，表明初始轮廓曲线不满足极片涂布工艺条件，此时，需要对初始轮廓曲线进行调整，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，并继续确定对应的初始正负极容量比值。当选取包围面积最大的至少一条曲线作为初始轮廓曲线情况下，可以通过收窄原始轮廓曲线集合，即删除初始上限轮廓曲线或下限轮廓曲线，在剩余的轮廓曲线集合中，确定初始轮廓曲线，即可得到更新的初始轮廓曲线，然后重复执行步骤102-103的实施例，直至更新的初始轮廓曲线对应的初始正负极容量比值满足预设正负极容量比值，将更新的初始轮廓曲线确定为初始涂布削薄区的边界，从而获取到获取初始涂布削薄区的边界为止。
在一个示例中，激光轮廓仪的检测设备以一定速度扫描，每隔0.5mm测得电池正负极片横向的料区及削薄区厚度数据，拟合函数h(x)=ax4+bx3+cx2+dx+e，该电池同侧出极耳，对应的负极极片的涂布削薄区上限轮廓曲线与下限轮廓曲线分别为：h(x) 负1= -0.0220 x 4+ 1.2588 x 3- 26.8828 x 2+ 254.2183 x - 817.4318、h(x) 负2= -0.0150 x 4+ 0.8585 x 3- 18.3276 x 2+ 172.4165 x - 527.1755，正极极片的涂布削薄区上限轮廓曲线与下限轮廓曲线分别为：h(x) 正1=0.0207x 4-1.1670x 3+23.6862x 2-201.1107x+677.0181、h(x) 2=-0.0002 x 4+0.0222x 3-0.9451x 2+17.1150x-19.3267，正极削薄区的宽度范围13mm~19mm，与正极对应的负极削薄区的宽度范围11.5mm~17.5mm，其他物理量已知，计算得到CBmin=1.1434，CBmax=1.2492，满足CB值管控要求，且涂布削薄区生产正常，负极极片的涂布削薄区上限轮廓曲线与下限轮廓曲线、正极极片的涂布削薄区上限轮廓曲线与下限轮廓曲线即可作为该产品型号正负极片削薄区管控标准的边界模型。
上述极片涂布削薄区的边界确定方法，通过获取极片的初始涂布削薄区对应的初始轮廓曲线，根据初始轮廓曲线确定目标极片的初始正负极容量比值，在初始正负极容量比值满足条件时，将初始轮廓曲线作为极片的涂布削薄区的边界，由于初始轮廓曲线定量表征削薄区轮廓，且基于初始轮廓曲线进行涂布削薄区的边界的确定依据，确保了涂布削薄区的边界设计的准确性，并且采用初始正负极容量比值进行合理性验证，提高了涂布削薄区的边界设计的合理性，从而提高了电芯电性能及安全性能。
如图7所示，本申请实施例还提供一种极片涂布削薄区的边界确定装置200，极片涂布削薄区的边界确定装置包括：
获取模块201，用于获取模块，用于从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
第一确定模块202，用于根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值；
第二确定模块203，用于若初始正负极容量比值满足预设正负极容量比值，则将初始轮廓曲线确定为初始涂布削薄区的边界。
在一实施例中，该装置还包括：
第三确定模块，用于若初始正负极容量比值不满足预设正负极容量比值，则从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成下一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，直至确定初始涂布削薄区的边界。
在一实施例中，该装置还包括：
第四确定模块，用于确定目标极片的初始涂布削薄区；
测试模块，用于对初始涂布削薄区和目标极片中的料区进行扫描测试，测得多组初始涂布削薄区的宽度与料区的厚度；
拟合模块，用于基于多组初始涂布削薄区的宽度与料区的厚度，以宽度为自变量，厚度为因变量进行曲线拟合，得到轮廓曲线集合。
在一实施例中，第一确定模块202具体还用于：
根据料区对应的料区面密度和初始轮廓曲线确定目标极片的面密度；
根据目标极片的面密度确定初始正负极容量比值。
在一实施例中，目标极片包括正极极片和负极极片，目标极片中的料区包括正极极片中的正极料区和负极极片中的负极料区，料区面密度包括正极料区和负极料区各自对应的料区面密度；第一确定模块202具体还用于：
根据正极料区对应的料区面密度和初始轮廓曲线确定正极极片对应的正极面密度，并根据负极料区对应的料区面密度、以及初始轮廓曲线确定负极极片对应的负极面密度；
根据正极面密度和负极面密度确定初始正负极容量比值。
在一实施例中，初始涂布削薄区包括正极极片对应的正极削薄区和负极极片对应的负极削薄区；第一确定模块202具体还用于：
基于正极料区对应的料区面密度和初始轮廓曲线，确定正极削薄区对应的正极削薄区面密度；
基于负极料区对应的料区面密度和初始轮廓曲线，确定负极削薄区对应的负极削薄区面密度；
基于正极削薄区面密度和正极料区对应的料区面密度确定正极面密度；
基于负极削薄区面密度和负极料区对应的料区面密度确定负极面密度。
在一实施例中，初始轮廓曲线包括正极削薄区对应的正极轮廓曲线；第一确定模块202具体还用于：
基于正极轮廓曲线确定正极削薄区对应的正极截面积；
基于正极轮廓曲线、正极截面积、及正极料区对应的料区面密度确定正极削薄区面密度。
在一实施例中，第一确定模块202具体还用于：
对正极轮廓曲线进行积分计算，得到正极截面积。
在一实施例中，第一确定模块202具体还用于：
基于正极轮廓曲线中自变量和因变量各自对应的端点值，确定正极削薄区的宽度和正极料区的厚度，得到正极涂布削薄区对应的宽度值和正极料区对应的厚度值；
根据厚度值与宽度值的乘积、正极料区对应的料区面密度和正极截面积确定正极削薄区面密度。
本申请实施例还提供一种电子设备，其集成了本申请实施例所提供的任一种极片涂布削薄区的边界确定装置，电子设备包括：
一个或多个处理器；
存储器；以及
一个或多个应用程序，其中一个或多个应用程序被存储于存储器中，并配置为由处理器执行上述极片涂布削薄区的边界确定方法实施例中任一实施例中的极片涂布削薄区的边界确定方法。
本申请实施例还提供一种电子设备，其集成了本申请实施例所提供的任一种极片涂布削薄区的边界确定装置。如图8所示，其示出了本申请实施例所涉及的电子设备的结构示意图，具体来讲：
该电子设备可以包括一个或者一个以上处理核心的处理器301、一个或一个以上计算机可读存储介质的存储器302、电源303和输入单元304等部件。本领域技术人员可以理解，图8中示出的电子设备结构并不构成对电子设备的限定，可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置。其中：
处理器301是该电子设备的控制中心，利用各种接口和线路连接整个电子设备的各个部分，通过运行或执行存储在存储器302内的软件程序和/或模块，以及调用存储在存储器302内的数据，执行电子设备的各种功能和处理数据，从而对电子设备进行整体监控。可选的，处理器301可包括一个或多个处理核心；优选的，处理器301可集成应用处理器和调制解调处理器，其中，应用处理器主要处理操作系统、用户界面和应用程序等，调制解调处理器主要处理无线通信。可以理解的是，上述调制解调处理器也可以不集成到处理器301中。
存储器302可用于存储软件程序以及模块，处理器301通过运行存储在存储器302的软件程序以及模块，从而执行各种功能应用以及数据处理。存储器302可主要包括存储程序区和存储数据区，其中，存储程序区可存储操作系统、至少一个功能所需的应用程序（比如声音播放功能、图像播放功能等）等；存储数据区可存储根据电子设备的使用所创建的数据等。此外，存储器302可以包括高速随机存取存储器，还可以包括非易失性存储器，例如至少一个磁盘存储器件、闪存器件、或其他易失性固态存储器件。相应地，存储器302还可以包括存储器控制器，以提供处理器301对存储器302的访问。
电子设备还包括给各个部件供电的电源303，优选的，电源303可以通过电源管理系统与处理器301逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。电源303还可以包括一个或一个以上的直流或交流电源、再充电系统、电源故障检测电路、电源转换器或者逆变器、电源状态指示器等任意组件。
该电子设备还可包括输入单元304，该输入单元304可用于接收输入的数字或字符信息，以及产生与用户设置以及功能控制有关的键盘、鼠标、操作杆、光学或者轨迹球信号输入。
尽管未示出，电子设备还可以包括显示单元等，在此不再赘述。具体在本实施例中，电子设备中的处理器301会按照如下的指令，将一个或一个以上的应用程序的进程对应的可执行文件加载到存储器302中，并由处理器301来运行存储在存储器302中的应用程序，从而实现各种功能，如下：
从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值；
若初始正负极容量比值满足预设正负极容量比值，则将初始轮廓曲线确定为初始涂布削薄区的边界。
本领域普通技术人员可以理解，上述实施例的各种方法中的全部或部分步骤可以通过指令来完成，或通过指令控制相关的硬件来完成，该指令可以存储于一计算机可读存储介质中，并由处理器进行加载和执行。
为此，本申请实施例提供一种计算机可读存储介质，所述计算机可读存储介质可以是非易失性，也可以是易失性，该存储介质可以包括：只读存储器（ROM，Read Only Memory）、随机存取记忆体（RAM，Random Access Memory）、磁盘或光盘等。其上存储有计算机程序，计算机程序被处理器进行加载，以执行本申请实施例所提供的任一种极片涂布削薄区的边界确定方法中的步骤。例如，计算机程序被处理器进行加载可以执行如下步骤：
从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
根据目标极片中的料区对应的料区面密度和初始轮廓曲线确定目标极片对应的初始正负极容量比值；
若初始正负极容量比值满足预设正负极容量比值，则将初始轮廓曲线确定为初始涂布削薄区的边界。
本申请实施例还提供一种计算机程序产品，包括计算机程序/指令，该计算机程序/指令被处理器执行时其用于执行申请实施例所提供的任一种极片涂布削薄区的边界确定方法中的步骤。

Claims (14)

  1. 一种极片涂布削薄区的边界确定方法，所述方法包括：
    从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，所述轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
    根据所述目标极片中的料区对应的料区面密度和所述初始轮廓曲线确定所述目标极片对应的初始正负极容量比值；
    若所述初始正负极容量比值满足预设正负极容量比值，则将所述初始轮廓曲线确定为所述初始涂布削薄区的边界。
  2. 根据权利要求1所述的极片涂布削薄区的边界确定方法，所述方法还包括：
    若所述初始正负极容量比值不满足预设正负极容量比值，则从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成下一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，直至确定所述初始涂布削薄区的边界。
  3. 根据权利要求1所述的极片涂布削薄区的边界确定方法，在所述从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线之前，还包括：
    确定目标极片的初始涂布削薄区；
    对所述初始涂布削薄区和目标极片中的料区进行扫描测试，测得多组所述初始涂布削薄区的宽度与所述料区的厚度；
    基于多组初始涂布削薄区的宽度与所述料区的厚度，以所述宽度为自变量，所述厚度为因变量进行曲线拟合，得到所述轮廓曲线集合。
  4. 根据权利要求3所述的极片涂布削薄区的边界确定方法，其中，所述根据所述目标极片中的料区对应的料区面密度和所述初始轮廓曲线确定所述目标极片对应的初始正负极容量比值，包括：
    根据所述料区对应的料区面密度和所述初始轮廓曲线确定所述目标极片的面密度；
    根据所述目标极片的面密度确定所述初始正负极容量比值。
  5. 根据权利要求4所述的极片涂布削薄区的边界确定方法，其中，所述目标极片包括正极极片和负极极片，所述目标极片中的料区包括正极极片中的正极料区和所述负极极片中的负极料区，所述料区面密度包括所述正极料区和所述负极料区各自对应的料区面密度，所述目标极片的面密度包括所述正极极片对应的正极面密度和所述负极极片对应的负极面密度；所述根据所述料区对应的料区面密度和所述初始轮廓曲线确定所述目标极片的面密度，包括：
    根据所述正极料区对应的料区面密度和所述初始轮廓曲线确定所述正极极片对应的正极面密度，并根据所述负极料区对应的料区面密度、以及所述初始轮廓曲线确定所述负极极片对应的负极面密度；
    所述根据所述目标极片的面密度确定所述初始正负极容量比值，包括：
    根据所述正极面密度和所述负极面密度确定所述初始正负极容量比值。
  6. 根据权利要求5所述的极片涂布削薄区的边界确定方法，其中，所述初始涂布削薄区包括所述正极极片对应的正极削薄区和所述负极极片对应的负极削薄区；所述根据所述正极料区对应的料区面密度和所述初始轮廓曲线确定所述正极极片对应的正极面密度，并根据所述负极料区对应的料区面密度、以及所述初始轮廓曲线确定所述负极极片对应的负极面密度，包括：
    基于所述正极料区对应的料区面密度和所述初始轮廓曲线，确定所述正极削薄区对应的正极削薄区面密度；
    基于所述负极料区对应的料区面密度和所述初始轮廓曲线，确定所述负极削薄区对应的负极削薄区面密度；
    基于所述正极削薄区面密度和所述正极料区对应的料区面密度确定所述正极面密度；
    基于所述负极削薄区面密度和所述负极料区对应的料区面密度确定所述负极面密度。
  7. 根据权利要求6所述的极片涂布削薄区的边界确定方法，其中，所述初始轮廓曲线包括所述正极削薄区对应的正极轮廓曲线；所述基于所述正极料区对应的料区面密度和所述初始轮廓曲线，确定所述正极削薄区对应的正极削薄区面密度，包括：
    基于所述正极轮廓曲线确定所述正极削薄区对应的正极截面积；
    基于所述正极轮廓曲线、所述正极截面积、及所述正极料区对应的料区面密度确定所述正极削薄区面密度。
  8. 根据权利要求7所述的极片涂布削薄区的边界确定方法，其中，所述基于所述正极轮廓曲线确定所述正极削薄区对应的正极截面积，包括：
    对所述正极轮廓曲线进行积分计算，得到所述正极截面积。
  9. 根据权利要求7所述的极片涂布削薄区的边界确定方法，其中，所述基于所述正极轮廓曲线、所述正极截面积、及所述正极料区对应的料区面密度确定所述正极削薄区面密度，包括：
    获取所述正极轮廓曲线中自变量对应的区间端点值；
    基于所述正极轮廓曲线中自变量对应的区间端点值确定所述正极轮廓曲线中因变量对应的区间端点值；
    基于所述正极轮廓曲线中自变量和因变量各自对应的区间端点值，确定所述正极削薄区的宽度和所述正极料区的厚度，得到所述正极涂布削薄区对应的宽度值和所述正极料区对应的厚度值；
    根据所述正极涂布削薄区对应的厚度值与所述正极料区对应的宽度值的乘积、所述正极料区对应的料区面密度和所述正极截面积确定所述正极削薄区面密度。
  10. 根据权利要求6所述的极片涂布削薄区的边界确定方法，其中，所述初始轮廓曲线包括所述负极削薄区对应的负极轮廓曲线；所述基于所述负极料区对应的料区面密度和所述初始轮廓曲线，确定所述负极削薄区对应的负极削薄区面密度，包括：
    基于所述负极轮廓曲线确定所述负极削薄区对应的负极截面积；
    基于所述负极轮廓曲线、所述负极截面积、及所述负极料区对应的料区面密度确定所述负极削薄区面密度。
  11. 根据权利要求10所述的极片涂布削薄区的边界确定方法，其中，所述基于所述负极轮廓曲线、所述负极截面积、及所述负极料区对应的料区面密度确定所述负极削薄区面密度，包括：
    获取所述负极轮廓曲线中自变量对应的区间端点值；
    基于所述负极轮廓曲线中自变量对应的区间端点值确定所述负极轮廓曲线中因变量对应的区间端点值；
    基于所述负极轮廓曲线中自变量和因变量各自对应的区间端点值，确定所述负极削薄区的宽度和所述负极料区的厚度，得到所述负极涂布削薄区对应的宽度值和所述负极料区对应的厚度值；
    根据所述负极涂布削薄区对应的厚度值与所述负极料区对应的宽度值的乘积、所述负极料区对应的料区面密度和所述负极截面积确定所述负极削薄区面密度。
  12. 一种极片涂布削薄区的边界确定装置，所述装置包括：
    获取模块，用于从目标极片的初始涂布削薄区对应的轮廓曲线集合中，获取构成一个削薄区形貌轮廓的至少一条轮廓曲线作为初始轮廓曲线，所述轮廓曲线集合包括构成多个削薄区形貌轮廓的多条轮廓曲线；
    第一确定模块，用于根据所述目标极片中的料区对应的料区面密度和所述初始轮廓曲线确定所述目标极片对应的初始正负极容量比值；
    第二确定模块，用于若所述初始正负极容量比值满足预设正负极容量比值，则将所述初始轮廓曲线确定为所述初始涂布削薄区的边界。
  13. 一种电子设备，所述电子设备包括：
    一个或多个处理器；
    存储器；以及
    一个或多个应用程序，其中所述一个或多个应用程序被存储于所述存储器中，并配置为由所述处理器执行以实现权利要求1至11中任一项所述的极片涂布削薄区的边界确定方法。
  14. 一种计算机可读存储介质，其上存储有计算机程序，所述计算机程序被处理器进行加载，以执行权利要求1至11任一项所述的极片涂布削薄区的边界确定方法。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118364613A (zh) * 2024-04-07 2024-07-19 湖北亿纬动力有限公司 极片涂布削薄区的边界确定方法、电子设备及存储介质
CN118364613B (zh) * 2024-04-07 2026-05-19 湖北亿纬动力有限公司 极片涂布削薄区的边界确定方法、电子设备及存储介质

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016224005A (ja) * 2015-06-03 2016-12-28 トヨタ自動車株式会社 塗膜幅測定方法及び塗膜幅測定装置
CN115683937A (zh) * 2023-01-04 2023-02-03 浙江双元科技股份有限公司 基于线阵光电传感器的锂电池极片面密度检测系统及方法
CN115808126A (zh) * 2023-02-03 2023-03-17 杭州百子尖科技股份有限公司 一种基于机器视觉扫描数据的锂电极片涂布边界定位方法
CN115824884A (zh) * 2022-11-08 2023-03-21 唐山国轩电池有限公司 一种基于锂电池涂布面密度仪测量极片削薄区的方法
CN116796113A (zh) * 2023-06-21 2023-09-22 楚能新能源股份有限公司 电池的消薄区容量计算方法及装置
WO2023240749A1 (zh) * 2022-06-16 2023-12-21 宁德时代新能源科技股份有限公司 电极组件、电池单体、电池和用电设备
CN117387542A (zh) * 2023-09-25 2024-01-12 湖北亿纬动力有限公司 电芯极片削薄的检测方法、装置、电子设备以及存储介质
CN117784999A (zh) * 2024-02-23 2024-03-29 宁德时代新能源科技股份有限公司 涂布方法及系统、计算机设备和存储介质

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016224005A (ja) * 2015-06-03 2016-12-28 トヨタ自動車株式会社 塗膜幅測定方法及び塗膜幅測定装置
WO2023240749A1 (zh) * 2022-06-16 2023-12-21 宁德时代新能源科技股份有限公司 电极组件、电池单体、电池和用电设备
CN115824884A (zh) * 2022-11-08 2023-03-21 唐山国轩电池有限公司 一种基于锂电池涂布面密度仪测量极片削薄区的方法
CN115683937A (zh) * 2023-01-04 2023-02-03 浙江双元科技股份有限公司 基于线阵光电传感器的锂电池极片面密度检测系统及方法
CN115808126A (zh) * 2023-02-03 2023-03-17 杭州百子尖科技股份有限公司 一种基于机器视觉扫描数据的锂电极片涂布边界定位方法
CN116796113A (zh) * 2023-06-21 2023-09-22 楚能新能源股份有限公司 电池的消薄区容量计算方法及装置
CN117387542A (zh) * 2023-09-25 2024-01-12 湖北亿纬动力有限公司 电芯极片削薄的检测方法、装置、电子设备以及存储介质
CN117784999A (zh) * 2024-02-23 2024-03-29 宁德时代新能源科技股份有限公司 涂布方法及系统、计算机设备和存储介质

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118364613A (zh) * 2024-04-07 2024-07-19 湖北亿纬动力有限公司 极片涂布削薄区的边界确定方法、电子设备及存储介质
CN118364613B (zh) * 2024-04-07 2026-05-19 湖北亿纬动力有限公司 极片涂布削薄区的边界确定方法、电子设备及存储介质

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