WO2023141971A1 - 一种双面涂布的纠偏方法、装置 - Google Patents

一种双面涂布的纠偏方法、装置 Download PDF

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Publication number
WO2023141971A1
WO2023141971A1 PCT/CN2022/074719 CN2022074719W WO2023141971A1 WO 2023141971 A1 WO2023141971 A1 WO 2023141971A1 CN 2022074719 W CN2022074719 W CN 2022074719W WO 2023141971 A1 WO2023141971 A1 WO 2023141971A1
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WIPO (PCT)
Prior art keywords
deviation
pole piece
edge
base material
information
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PCT/CN2022/074719
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English (en)
French (fr)
Inventor
马云飞
张涛
Original Assignee
宁德时代新能源科技股份有限公司
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Application filed by 宁德时代新能源科技股份有限公司 filed Critical 宁德时代新能源科技股份有限公司
Priority to EP22922811.9A priority Critical patent/EP4362125A1/en
Priority to CN202280054955.8A priority patent/CN117751463A/zh
Priority to PCT/CN2022/074719 priority patent/WO2023141971A1/zh
Publication of WO2023141971A1 publication Critical patent/WO2023141971A1/zh
Priority to US18/405,420 priority patent/US11978879B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of manufacture in general
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present application relates to the technical field of battery manufacturing, in particular to a method and device for correcting deviation of double-sided coating.
  • the coating process is a crucial part. During the coating process, due to reasons such as the pressure of the coating die nozzle, the coating result will be deviated, which will affect the safety performance of the battery.
  • the present application provides a deviation correction method and device for double-sided coating, which can improve the problem of deviation in the coating area during the coating process.
  • the first aspect of the present application provides a double-sided coating deviation correction method, the method comprising: obtaining the edge of the coating area on the first surface of the pole piece substrate to the edge of the pole piece substrate on the deviation correction cross section The first distance of the first distance, the rectifying cross-section is perpendicular to the plane where the pole piece base material is located along the width direction of the pole piece base material; The second distance from the edge of the coating area to the edge of the pole piece substrate, the edge of the coating area on the second surface corresponds to the edge of the coating area on the first surface; according to the first The distance and the second distance determine the edge deviation information of the coating area; determine the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range; in the case where there is a first intersection in the first deviation adjustment range Next, determine the deflection correction amount of the pole piece base material according to the first intersection.
  • the deviation correction amount of the pole piece base material determined by the intersection of the deviation adjustment ranges can make the edge deviation information of the coating area meet the standard requirements after deviation correction adjustment.
  • determining the deviation correction amount of the pole piece base material according to the first intersection includes: If there is no intersection of the adjustment ranges, the second deviation adjustment range is determined according to the edge deviation information of the coating area and the second deviation correction range; The two intersections determine the deviation correction amount of the pole piece base material, wherein the second deviation correction range is greater than the first deviation correction range.
  • determining the deviation correction amount of the pole piece base material according to the second intersection can reduce the misalignment amount between the first distance and the second distance.
  • the determining the deviation correction amount of the pole piece base material according to the first intersection includes: determining first deviation information according to the edge deviation information of the coating area, wherein the first The deviation information includes the first deviation amount and the first average deviation amount; the second deviation information is determined according to the edge deviation information of the coating area and the alternative deviation correction amount, wherein the alternative deviation correction amount satisfies the deviation adjustment range
  • the second deviation information includes a second deviation amount and a second average deviation amount; according to the first deviation information and the second deviation information, the deviation correction amount of the pole piece base material is determined.
  • the first deviation information and the second deviation information determine the deviation correction amount of the pole piece base material, which can further optimize the deviation correction result.
  • the determining the deviation correction amount of the pole piece base material according to the first intersection includes: determining the The deviation between the first distance and the second distance; when the deviation between the first distance and the second distance satisfies the first deviation correction range, the deviation correction of the pole piece base material is determined as The amount of correction.
  • the deviation between the first distance and the second distance of the coating area can meet the deviation range allowed by the standard.
  • the determining the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information includes: the first deviation information and the second deviation information One or more of the following preset conditions are met: the second deviation is less than the first deviation and the second average deviation is less than the first average deviation; the second deviation is less than or equal to the first deviation and the second average deviation is less than the first average deviation; the second deviation is less than the first deviation and the second average deviation is less than or equal to the The first average deviation amount: according to the first deviation information and the second deviation information, determine the deviation correction amount of the pole piece base material.
  • the determining the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range includes: when the edge deviation information of the coating area does not meet the requirements of the first deviation correction range In some cases, the first deviation adjustment range is determined according to the edge deviation information of the coating area and the first deviation correction range.
  • the edge deviation information of the coating area does not meet the first deviation correction range, it is considered that the deviation between the first distance and the second distance exceeds the allowable range of the standard, and therefore the pole piece substrate needs to be corrected and adjusted.
  • the second aspect of the present application provides a double-sided coating deviation correction device, the device includes: an acquisition module, used to acquire the edge of the coating area on the first surface of the pole piece substrate on the deviation correction cross section to the The first distance from the edge of the pole piece base material, the deflection correction cross section is perpendicular to the plane where the pole piece base material is located along the width direction of the pole piece base material; the pole piece base material is obtained on the deflection correction cross section The second distance from the edge of the coating area on the second surface to the edge of the pole piece substrate, the edge of the coating area on the second surface corresponds to the edge of the coating area on the first surface one by one.
  • the processing module is used to determine the edge deviation information of the coating area according to the first distance and the second distance; determine the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range; If a deviation adjustment range has a first intersection, the deviation correction amount of the pole piece base material is determined according to the first intersection.
  • the control module is used to control the deviation correction distance of the pole piece base material according to the deviation correction amount of the pole piece base material.
  • the correction amount of the pole piece base material determined by the processing module through the intersection of the deviation adjustment ranges can make the edge deviation information of the coating area meet the standard requirements after being adjusted by the control module.
  • the processing module is configured to determine the deviation correction amount of the pole piece base material according to the first intersection in the case that the first deviation adjustment range has a first intersection, including: the The processing module is used to determine a second deviation adjustment range according to the edge deviation information of the coating area and the second deviation correction range when there is no intersection in the first deviation adjustment range; there is a second deviation adjustment range in the second deviation adjustment range In the case of two intersections, the deflection correction amount of the pole piece base material is determined according to the second intersection, wherein the second deflection correction range is greater than the first deflection correction range.
  • the processing module determines the deviation correction amount of the pole piece base material according to the second intersection, which can reduce the misalignment between the first distance and the second distance.
  • the processing module is further configured to determine the deviation correction amount of the pole piece base material according to the first intersection includes: the processing module is further configured to, according to the edge deviation information of the coating area, Determine the first deviation information, wherein the first deviation information includes the first deviation amount and the first average deviation amount; determine the second deviation information according to the coating area edge deviation information and the alternative deviation correction amount, wherein the The candidate deviation correction amount satisfies the intersection of the deviation adjustment range, and the second deviation information includes a second deviation amount and a second average deviation amount; according to the first deviation information and the second deviation information, determine the Correction amount of pole piece base material.
  • the processing module determines the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information, which can further optimize the deviation correction result.
  • the processing module is further configured to determine the deviation correction amount of the pole piece base material according to the first intersection includes: the processing module is configured to use the edge deviation information of the coating area and the The deviation amount of the pole piece base material is determined to determine the deviation amount between the first distance and the second distance; when the deviation amount between the first distance and the second distance satisfies the first deviation correction range, The deflection correction amount of the pole piece base material is determined as the deflection correction amount.
  • the deviation between the first distance and the second distance of the coating area can meet the deviation range allowed by the standard.
  • the processing module is further configured to determine the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information including: the first deviation information and the second deviation information
  • the second deviation information satisfies one or more of the following preset conditions: the second deviation is smaller than the first deviation and the second average deviation is smaller than the first average deviation; The second deviation is less than or equal to the first deviation and the second average deviation is less than the first average deviation; the second deviation is less than the first deviation and the second average deviation less than or equal to the first average deviation.
  • the processing module determines the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information.
  • the processing module sets preset conditions to determine whether the deviation correction results of the candidate deviation correction amounts that meet the intersection of the deviation adjustment ranges have improved, and select the deviation correction amount with better deviation correction results.
  • the processing module is further configured to determine the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range includes: when the edge deviation information of the coating area does not meet the specified In the case of the first deviation correction range, the processing module determines the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range.
  • the processing module believes that the deviation between the first distance and the second distance exceeds the range allowed by the standard, so it is necessary to correct the pole piece substrate Adjustment.
  • the third aspect of the present application provides a reverse current control device for a phase-shifted full-bridge circuit, including a memory and a processor, the memory is used to store instructions, and the processor is used to read the instructions and based on the instructions Execute the above first aspect and the method in any possible implementation manner of the first aspect.
  • the fourth aspect of the present application provides a double-sided coating deviation correction mechanism, including the double-sided coating deviation correction device of the second or third aspect above.
  • a fifth aspect of the present application provides a readable storage medium for storing a computer program, and the computer program is used to execute the above first aspect and the method in any possible implementation manner of the first aspect.
  • Fig. 1 is a schematic flow chart of a double-sided coating deviation correction method disclosed in an embodiment of the present application
  • Fig. 2 is a schematic diagram of double-sided coating disclosed by an embodiment of the present application.
  • Fig. 3 is a schematic flow chart of a double-sided coating deviation correction method disclosed in an embodiment of the present application
  • Fig. 4 is a schematic block diagram of a deviation correcting device for double-sided coating disclosed in another embodiment of the present application.
  • multiple refers to more than two (including two), similarly, “multiple groups” refers to more than two groups (including two), and “multiple pieces” refers to More than two pieces (including two pieces).
  • Power batteries are not only used in energy storage power systems such as hydraulic, thermal, wind and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields .
  • energy storage power systems such as hydraulic, thermal, wind and solar power plants
  • electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, as well as military equipment and aerospace and other fields .
  • With the continuous expansion of power battery application fields its market demand is also constantly expanding. Therefore, improving the power battery production process will directly affect the safety and stability of the battery.
  • the coating process is a crucial part in the production and manufacture of batteries.
  • the coating result of the pole piece will be deviated.
  • the misalignment of the front and back of the pole piece coating area exceeds a certain range, if it is not found in time to correct the deviation, it will be significantly affect the safety performance of the battery, will also seriously increase the reject rate of the product, and increase the manufacturing cost.
  • the problem of coating offset can be improved through a control strategy. Specifically, the deviation of the front and back sides of the coating area is controlled within a qualified range by means of deviation correction.
  • the offset of the front and back sides of different coating areas can be taken into account, effectively ensuring the production quality of the pole piece.
  • the double-sided coating deviation correction method and device disclosed in the embodiments of the present application can be used, but not limited to, in the production and manufacture of pole pieces in electric devices such as vehicles, ships or aircraft.
  • Coating equipment composed of the double-sided coating deviation correction method and device disclosed in this application can be used, which is conducive to improving the problem of double-sided coating deviation and improving the yield of pole piece production.
  • An embodiment of the present application provides an electrical device, and the pole piece in the electrical device is manufactured using a double-sided coating deviation correction method.
  • Electric devices can be but not limited to mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc.
  • electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.
  • spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.
  • the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator.
  • a battery cell works primarily by moving metal ions between the positive and negative plates.
  • the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer.
  • the positive electrode active material layer is coated on the surface of the positive electrode current collector.
  • the current collector not coated with the positive electrode active material layer protrudes from the current collector coated with the positive electrode active material layer.
  • the current collector coated with the positive electrode active material layer can be used as the positive electrode tab.
  • the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
  • the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer.
  • the negative electrode active material layer is coated on the surface of the negative electrode current collector.
  • the current collector without the negative electrode active material layer protrudes from the current collector coated with the negative electrode active material layer.
  • the current collector coated with the negative electrode active material layer can be used as the negative electrode tab.
  • the material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon.
  • Fig. 1 is a schematic flowchart of a double-sided coating deviation correction method disclosed in an embodiment of the present application.
  • Step 101 obtain the first distance from the edge of the coating area on the first surface of the pole piece substrate to the edge of the pole piece substrate on the deviation correction cross section, where the deviation correction cross section is along the width direction of the pole piece substrate and where the pole piece substrate is located plane vertical.
  • the correction cross section refers to the cross section of the base material of the pole piece.
  • the deflection correcting cross section can be perpendicular to the plane where the pole piece base material is located along the width direction of the pole piece base material.
  • the pole piece may include a positive pole piece and a negative pole piece.
  • the pole sheet substrate may include a positive current collector and a negative current collector.
  • the edge of the pole piece base material refers to the edge of the pole piece base material in the length direction. It can be any side or both sides of the pole piece base material in the length direction, which is not limited in this embodiment.
  • the first surface refers to one of the surfaces coated with the active material layer on the pole piece base material, which may be the front side of the pole piece base material or the reverse side of the pole piece base material, which is not limited in this embodiment.
  • the second surface refers to the side corresponding to the first surface on the pole piece substrate.
  • the coating area refers to the area where the active material layer is applied.
  • the edge of the coating area refers to the edge in the length direction of the coating area, which may be one side of the coating area in the length direction, which is not limited in this embodiment.
  • the first distance refers to the distance in the width direction from the edges on both sides of the coating area on the first surface to one edge of the electrode sheet substrate.
  • Step 102 obtain a second distance from the edge of the coating area on the second surface of the pole piece base material to the edge of the pole piece base material on the deflection correction cross section, the edge of the coating area on the second surface is the same as the coating area on the first surface There is one-to-one correspondence between the edges of the layout area.
  • the second distance refers to the distance in the width direction from the edges on both sides of the coating area on the second surface to one edge of the pole piece substrate.
  • the second distance and the first distance are determined, and an edge on the same side of the pole piece base material is selected.
  • the second distance from the edge of the substrate can be the length of the first distance and the second distance on the deviation correction cross section obtained in real time according to the imaging device, or the first distance and the second distance on the deviation correction cross section can be obtained according to manual measurement after stopping the machine.
  • the length of the distance and the specific acquisition method are not limited in this embodiment.
  • Step 103 determining edge deviation information of the coating area according to the first distance and the second distance.
  • the edge deviation information of the coating area refers to the amount of offset between the edge of each coating area on the first surface and the corresponding edge of each coating area on the second surface.
  • the distance from the edge of each coating area on the first surface to the edge of the pole piece substrate can be expressed as D 1 , D 2 ... D n
  • the distance from the edge of each coating area on the second surface to the edge of the pole piece substrate It can be expressed as D 1 ', D 2 '...D n '.
  • W2 D 2 -D 2 ′
  • W n D n -D n ′.
  • Figure 2 shows a schematic view of an alternative embodiment where the first surface has two coating areas and the second surface has two corresponding coating areas.
  • Step 104 determining a first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range.
  • the first deviation correction range refers to the allowable deviation range of pole piece coating in the production and manufacture of power batteries.
  • the offset range may be a national standard, or a company standard, an industry standard, the maximum misalignment of the double-sided coating of the pole piece allowed in the production and manufacture of the battery, etc., which is not limited in this embodiment.
  • the first deviation adjustment range refers to the range in which the pole piece base material needs to be adjusted for deviation correction in order to adjust the edge deviation information of the coating area to within the first deviation correction range.
  • the required first deviation correction range is (-0.8,0.8) (unit: mm)
  • the deviation adjustment range can be expressed as Range(1) ⁇ (-0.8-W 1 , 0.8+W 1 ),... ..., Range(n) ⁇ (-0.8-W n , 0.8+W n ), unit: millimeter mm.
  • Step 105 if there is a first intersection in the first deviation adjustment range, determine the deviation correction amount of the pole piece base material according to the first intersection.
  • the first intersection refers to the intersection of the first deviation adjustment ranges. When there is only one coating area on the pole piece, the first intersection can be the first deviation adjustment range.
  • the correction amount of the pole piece base material refers to the distance to be adjusted in the width direction of the pole piece base material.
  • the deviation correction amount of the base material of the pole piece satisfies the intersection of the deviation adjustment range.
  • the deviation correction amount of the pole piece base material may be an endpoint value, an arbitrary value, a determined value, etc. within the intersection of deviation adjustment ranges, which is not limited in this embodiment.
  • the deviation correction amount may take values at certain intervals within the intersection of the deviation adjustment ranges.
  • the value interval ratio of the deviation correction amount may be 0.05 mm, etc., which is not limited in this embodiment.
  • the deflection correction direction of the pole piece base material refers to the deflection correction adjustment in the width direction of the pole piece base material.
  • the distance from one edge of the pole piece substrate to both sides of the coating area determines the first distance, and when the deviation correction amount is a positive number, the deviation is corrected in a direction away from the edge of the coating area away from the edge of the side pole piece substrate.
  • the deviation correction amount is a positive number, the deviation correction is carried out toward the direction where the edge of the coating area is close to the edge of the electrode plate substrate on this side.
  • the edge deviation information of the coating area by obtaining the first distance from the edge of the coating area on the first surface of the pole piece substrate to the edge of the pole piece substrate and the distance from the edge of the coating area on the second surface of the pole piece substrate to the pole piece.
  • the second distance from the edge of the substrate determines the edge deviation information of the coating area, and then combines the first deviation correction range to determine the deviation adjustment range, and determines the deviation correction amount of the pole piece base material according to the intersection of the deviation adjustment ranges. It can make the edge deviation information of the coating area meet the standard requirements after deviation correction adjustment.
  • Fig. 3 is a schematic flow chart of the deviation correction method for double-sided coating disclosed in the embodiment of the present application.
  • determining the deviation correction amount of the pole piece base material according to the first intersection includes:
  • the second deviation adjustment range is determined according to the edge deviation information of the coating area and the second deviation correction range.
  • the deviation correction amount of the pole piece base material is determined according to the second intersection, wherein the second deviation correction range is greater than the first deviation correction range.
  • the third deviation adjustment range is determined according to the edge deviation information of the coating area and the third deviation correction range.
  • the deviation correction amount of the pole piece base material is determined according to the third intersection, wherein the third deviation correction range is greater than the second deviation correction range.
  • the fourth deviation adjustment range is determined according to the coating area edge deviation information and the fourth deviation correction range.
  • the deviation correction amount of the pole piece base material is determined according to the fourth intersection, wherein the fourth deviation correction range is greater than the third deviation correction range.
  • the fifth deviation adjustment range is determined according to the coating area edge deviation information and the fifth deviation correction range.
  • the deviation correction amount of the pole piece base material is determined according to the fifth intersection, wherein the fifth deviation correction range is greater than the fourth deviation correction range.
  • the first deviation correction range may be gradually expanded to the nth deviation correction range until the nth intersection occurs in the nth deviation adjustment range.
  • the deviation correction amount of the base material of the pole piece is determined according to the nth intersection, wherein, n is a positive integer.
  • the size of each expansion of the deviation correction range may be 0.1 mm, 0.2 mm, or 0.3 mm, etc., which is not limited in this embodiment.
  • the first deviation correction range can be expanded by 0.1mm each time, then the first deviation correction range is (-0.7,0.7), the second deviation correction range is (-0.8,0.8), and the third deviation correction range is (-0.9,0.9) , unit: mm.
  • the first deviation correction range gradually expands to the nth deviation correction range, and the nth deviation correction range does not exceed [-2, 2], unit: mm.
  • the purpose of limiting the n-th deviation correction range to no more than [-2, 2] is to make the adjusted misalignment between the first distance and the second distance meet the requirements of the minimum manufacturing standard.
  • the minimum manufacturing standard may include the maximum misalignment of double-sided coating of the pole piece allowed in the production and manufacture of the battery.
  • the deviation correction amount of the pole piece base material is determined according to the nth intersection, so that the misalignment amount between the first distance and the second distance can be reduced.
  • determining the deflection correction amount of the pole piece base material according to the first intersection includes:
  • first deviation information is determined, wherein the first deviation information includes a first deviation amount and a first average deviation amount.
  • the second deviation information is determined according to the edge deviation information of the coating area and the alternative correction amount, wherein the alternative correction amount satisfies the intersection of the deviation adjustment range, and the second deviation information includes the second deviation amount and the second average deviation amount.
  • the deviation correction amount of the pole piece base material is determined.
  • the first deviation amount refers to initial maximum edge deviation information m of the coating area.
  • the first average deviation refers to initial average edge deviation information n of the coating area.
  • the second deviation amount refers to the maximum edge deviation information m 1 of the coating area obtained after adjusting the edge deviation information of the coating area according to the intersection of the deviation adjustment ranges.
  • the second average deviation refers to the average deviation information n 1 of the coating area obtained after adjusting the edge deviation information of the coating area according to the intersection of the deviation adjustment ranges.
  • x refers to the alternative correction amount
  • x satisfies the intersection of the deviation adjustment ranges
  • x can take a value at a certain interval within the intersection of the deviation adjustment ranges.
  • the value of the interval ratio of x may be related to the deviation correction accuracy, for example, the value of the interval ratio of x may be 0.05mm.
  • the value of x can be -0.2, -0.15, -0.1, -0.05, 0, 0.05, 0.1 (unit: mm mm) .
  • determining the deviation correction amount of the pole piece base material refers to selecting a group of m 1 and n 1 that is closest to zero among the obtained multiple sets of m 1 and n 1 values, Then determine the value of x of the group m 1 and n 1 , which is the deviation correction amount of the base material of the pole piece.
  • a set of m 1 and n 1 that is closest to zero is selected to further optimize the deviation correction result.
  • determining the deviation correction amount of the pole piece base material includes:
  • the first deviation information and the second deviation information satisfy one or more of the following preset conditions:
  • the second deviation is less than the first deviation and the second average deviation is less than the first average deviation
  • the second deviation is less than or equal to the first deviation and the second average deviation is smaller than the first average deviation
  • the second deviation is smaller than the first deviation and the second average deviation is less than or equal to the first average deviation.
  • the deviation correction amount of the pole piece base material is determined.
  • the first deviation information and the second deviation information include at least one of the following preset conditions: m 1 ⁇ m and n 1 ⁇ n; m 1 ⁇ m and n 1 ⁇ n; m 1 ⁇ m and n 1 ⁇ n.
  • determining the deviation correction amount of the pole piece base material refers to determining a group of m 1 , n 1 among all m 1 , n 1 that meet the preset conditions, which are the closest to zero 1 . Then determine the value of the alternative correction amount x of the group m 1 and n 1 , which is the correction amount of the base material of the pole piece.
  • Range [-0.4,0]. Then the value of the second coefficient x can be -0.4, -0.35, -0.3, -0.25, -0.2, -0.15, -0.1, -0.05, 0.
  • n Mean(
  • m 1 Max(
  • n 1 Mean(
  • n 1 n, meeting the preset conditions.
  • n 1 n, meeting the preset conditions.
  • n 1 n, meeting the preset conditions.
  • m 1 and n 1 are a group of m 1 and n 1 that are closest to zero, and the pole piece base
  • the correction amount of the material is -0.2.
  • determining the deflection correction amount of the pole piece base material according to the first intersection includes:
  • the deviation between the first distance and the second distance is determined according to the edge deviation information of the coating area and the deviation correction amount of the pole sheet substrate.
  • the deviation correction amount of the pole piece base material is determined as the deviation correction amount.
  • determining the deviation between the first distance and the second distance refers to combining the determined deviation correction amount of the pole piece base material with the edge deviation information of the coating area to judge The edge deviation information of the coating area after the adjustment of the determined deviation correction amount of the pole piece base material, that is, the deviation amount between the first distance and the second distance, judges whether the deviation amount satisfies the first deviation correction range, and if so, the extreme The web guide amount is determined as the web guide amount.
  • the deviation between the first distance and the second distance of the coating area can meet the deviation range allowed by the standard.
  • the first deviation adjustment range is determined according to the edge deviation information of the coating area and the first deviation correction range, including:
  • the first deviation adjustment range is determined according to the edge deviation information of the coating area and the first deviation correction range.
  • the edge deviation information of the coating area does not meet the first deviation correction range, it is considered that the deviation between the first distance and the second distance exceeds the range allowed by the standard, so it is necessary to perform deviation correction adjustment on the pole piece substrate.
  • Fig. 4 is a schematic block diagram of a deviation correcting device for double-sided coating disclosed in another embodiment of the present application.
  • the deviation correcting device for double-sided coating may include an acquisition module 401 , a processing module 402 and a control module 403 .
  • the obtaining module 401 is used to obtain the first distance from the edge of the coating area on the first surface of the pole piece base material to the edge of the pole piece base material on the deviation correction cross section, and the deviation correction cross section is along the width direction of the pole piece base material and the pole piece
  • the plane where the substrate is located is vertical; obtain the second distance from the edge of the coating area on the second surface of the pole sheet substrate to the edge of the pole sheet substrate on the rectification cross-section, the edge of the coating area on the second surface and the first There is a one-to-one correspondence between the edges of the coating area on the surface.
  • the processing module 402 is used to determine the edge deviation information of the coating area according to the first distance and the second distance; determine the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range; there is a first deviation adjustment range in the first deviation adjustment range. In the case of intersection, the deflection correction amount of the pole piece base material is determined according to the first intersection.
  • the control module 403 is configured to control the deviation correction distance of the pole piece base material according to the deviation correction amount of the pole piece base material.
  • the first distance from the edge of the coating area on the first surface of the pole piece substrate to the edge of the pole piece substrate and the edge of the coating area on the second surface of the pole piece base material are obtained by the acquisition module 401 The second distance to the edge of the pole piece substrate.
  • the processing module 402 determines the edge deviation information of the coating area, and then determines the deviation adjustment range in combination with the first deviation adjustment range.
  • the processing module 402 determines the correction amount of the pole piece substrate through the intersection of the deviation adjustment ranges, so that the edge deviation information of the coating area can be in After deviation correction and adjustment by the control module 403, it meets the standard requirements.
  • the processing module 402 is also used to determine the deviation correction amount of the pole piece base material according to the first intersection when the first deviation adjustment range has a first intersection, including:
  • the processing module 402 is used to determine the second deviation adjustment range according to the edge deviation information of the coating area and the second deviation correction range when there is no intersection in the first deviation adjustment range; if there is a second intersection in the second deviation adjustment range , determine the deviation correction amount of the pole piece base material according to the second intersection, wherein the second deviation correction range is greater than the first deviation correction range.
  • the processing module 402 determines the third deviation adjustment range according to the edge deviation information of the coating area and the third deviation correction range. In the case that there is a third intersection in the third deviation adjustment range, the deviation correction amount of the pole piece base material is determined according to the third intersection, wherein the third deviation correction range is greater than the second deviation correction range.
  • the processing module 402 determines the fourth deviation adjustment range according to the edge deviation information of the coating area and the fourth deviation correction range. In the case that there is a fourth intersection in the fourth deviation adjustment range, the deviation correction amount of the pole piece base material is determined according to the fourth intersection, wherein the fourth deviation correction range is greater than the third deviation correction range.
  • the processing module 402 determines the fifth deviation adjustment range according to the edge deviation information of the coating area and the fifth deviation correction range. In the case that there is a fifth intersection in the fifth deviation adjustment range, the deviation correction amount of the pole piece base material is determined according to the fifth intersection, wherein the fifth deviation correction range is greater than the fourth deviation correction range.
  • the processing module 402 may gradually expand the first deviation correction range to the nth deviation correction range until the nth intersection occurs in the nth deviation adjustment range.
  • the processing module 402 determines the deviation correction amount of the pole piece base material according to the nth intersection, wherein, n is a positive integer.
  • the size of each expansion of the deviation correction range may be 0.1mm, 0.2mm or 0.3mm, etc.
  • the processing module 402 can expand the first deviation correction range by 0.1mm each time, then the first deviation correction range is (-0.7,0.7), the second deviation correction range is (-0.8,0.8), and the third deviation correction range is (-0.9 ,0.9), unit: mm.
  • the processing module 402 may gradually expand the first deviation correction range to the nth deviation correction range, where the nth deviation correction range does not exceed [-2, 2], unit: mm.
  • the processing module 402 determines the deviation correction amount of the pole piece base material according to the nth intersection, which can reduce the misalignment amount between the first distance and the second distance .
  • the processing module 402 is also used to determine the deviation correction amount of the pole piece base material according to the first intersection, including:
  • the processing module 402 is further configured to determine first deviation information according to the coating area edge deviation information, wherein the first deviation information includes a first deviation amount and a first average deviation amount;
  • the deviation correction amount of the pole piece base material is determined.
  • the processing module 402 determines the correction amount of the base material of the pole piece, which means that among the multiple sets of m 1 and n 1 values obtained, the processing module 402 selects a group that is closest to zero m 1 and n 1 , the processing module 402 determines the value of x of the set of m 1 and n 1 as the deviation correction amount of the pole piece base material.
  • the processing module 402 selects a set of m 1 and n 1 that are closest to zero among the obtained multiple sets of m 1 and n 1 values, so as to further optimize the deviation correction result.
  • the processing module 402 is also used to determine the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information, including:
  • the first deviation information and the second deviation information satisfy one or more of the following preset conditions:
  • the second deviation is less than the first deviation and the second average deviation is less than the first average deviation
  • the second deviation is less than or equal to the first deviation and the second average deviation is smaller than the first average deviation
  • the second deviation is smaller than the first deviation and the second average deviation is less than or equal to the first average deviation.
  • the processing module 402 determines the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information.
  • the processing module 402 judging the first deviation information and the second deviation information includes at least one of the following preset conditions: m 1 ⁇ m and n 1 ⁇ n; m 1 ⁇ m and n 1 ⁇ n; m 1 ⁇ m and n 1 ⁇ n.
  • the processing module 402 determines the deviation correction amount of the pole piece base material according to the first deviation information and the second deviation information means that among all the m 1 and n 1 that meet the preset conditions, the processing module 402 determines that one of them is closest to zero A set of m 1 , n 1 . Then the processing module 402 determines the value of x of the group m 1 and n 1 as the deviation correction amount of the pole piece base material.
  • preset conditions are set in the processing module 402 to determine whether the deviation correction results of the candidate deviation correction amounts meeting the intersection of deviation adjustment ranges have improved, and select the deviation correction amounts with better deviation correction results.
  • the processing module 402 is also used to determine the deviation correction amount of the pole piece base material according to the first intersection, including:
  • the processing module 402 is used to determine the deviation between the first distance and the second distance according to the edge deviation information of the coating area and the deviation correction amount of the pole sheet substrate;
  • the deviation correction amount of the pole piece base material is determined as the deviation correction amount.
  • the processing module 402 determines the deviation between the first distance and the second distance according to the edge deviation information of the coating area and the correction amount of the pole piece substrate. The information is combined, and the processing module 402 judges the edge deviation information of the coating area after the adjustment of the determined deviation correction amount of the pole piece base material, that is, the deviation amount between the first distance and the second distance, and the processing module 402 judges whether the deviation amount satisfies If the first deviation correction range is satisfied, the deviation correction amount of the pole piece base material is determined as the deviation correction amount.
  • the control module 403 performs deflection correction adjustment on the pole piece base material according to the deflection correction amount.
  • control module 403 corrects and adjusts the pole piece base material according to the deviation correction amount, so that the adjusted deviation between the first distance and the second distance of the coating area meets the deviation range allowed by the standard.
  • the processing module 402 is also configured to determine the first deviation adjustment range according to the edge deviation information of the coating area and the first deviation correction range, including:
  • the processing module 402 determines the first deviation adjustment range according to the coating area edge deviation information and the first deviation correction range.
  • the processing module 402 if the edge deviation information of the coating area does not meet the first deviation correction range, the processing module 402 considers that the deviation between the first distance and the second distance exceeds the range allowed by the standard, so it is necessary to carry out the correction on the pole piece base material. Correction adjustment.
  • the embodiment of the present application also provides another double-sided coating deviation correction device, which includes a memory and a processor, wherein the memory is used to store instructions, and the processor is used to read the instructions and execute the various implementations of the foregoing application based on the instructions. example method.
  • the embodiment of the present application also provides a readable storage medium for storing a computer program, and the computer program is used to execute the method in the foregoing various embodiments of the present application.
  • An embodiment of the present application also provides a double-sided coating deviation correction mechanism, including the double-sided coating deviation correction device described above in the embodiment of the present application.

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Abstract

本申请提供一种双面涂布的纠偏方法及装置，涉及电池制造技术领域。该方法包括：在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到极片基材边缘的第一距离，纠偏横截面沿极片基材宽度方向与极片基材所在的平面垂直。在纠偏横截面上获取极片基材的第二表面上的涂布区边缘到极片基材边缘的第二距离，第二表面上的涂布区边缘与第一表面上的涂布区边缘一一对应。根据第一距离和第二距离确定涂布区边缘偏差信息。根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围。在第一偏差调整范围存在第一交集的情况下，根据第一交集确定极片基材的纠偏量。该方法能够改善在涂布过程中涂布区发生偏差的问题。

Description

一种双面涂布的纠偏方法、装置 技术领域
本申请涉及电池制造技术领域，具体涉及一种双面涂布的纠偏方法、装置。
背景技术
节能减排是汽车产业可持续发展的关键，电动车辆由于其节能环保的优势成为汽车产业可持续发展的重要组成部分。对于电动车辆而言，电池制造技术又是关乎其发展的一项重要因素。
在电池的生产制造中，涂布工序是至关重要的一环。在涂布过程中，由于涂布模头喷嘴压力等原因，会使涂布结果出现偏差，影响电池安全性能。
发明内容
鉴于上述问题，本申请提供一种双面涂布的纠偏方法、装置，能够改善在涂布过程中涂布区发生偏差的问题。
本申请第一方面提供了一种双面涂布的纠偏方法，所述方法包括：在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到所述极片基材边缘的第一距离，所述纠偏横截面沿所述极片基材宽度方向与所述极片基材所在的平面垂直；在所述纠偏横截面上获取所述极片基材的第二表面上的涂布区边缘到所述极片基材边缘的第二距离，所述第二表面上的涂布区边缘与所述第一表面上的涂布区边缘一一对应； 根据所述第一距离和所述第二距离确定涂布区边缘偏差信息；根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围；在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的纠偏量。
本申请的实施例中，通过偏差调整范围的交集确定的极片基材的纠偏量，可以使得涂布区边缘偏差信息在经过纠偏调整后符合标准要求。
在一些可能的实施例中，所述在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的纠偏量包括：在所述第一偏差调整范围不存在交集的情况下，根据所述涂布区边缘偏差信息和第二纠偏范围确定第二偏差调整范围；在所述第二偏差调整范围存在第二交集的情况下，根据所述第二交集确定所述极片基材的纠偏量，其中，所述第二纠偏范围大于第一纠偏范围。
本申请的实施例中，在第一偏差调整范围不存在交集的情况下，根据第二交集确定极片基材的纠偏量，可以使得第一距离与第二距离的错位量减小。
在一些可能的实施例中，所述根据所述第一交集确定所述极片基材的纠偏量包括：根据所述涂布区边缘偏差信息，确定第一偏差信息，其中，所述第一偏差信息包括第一偏差量和第一平均偏差量；根据所述涂布区边缘偏差信息与备选纠偏量，确定第二偏差信息，其中，所述备选纠偏量满足所述偏差调整范围的交集，所述第二偏差信息包括第二偏差量和第二平均偏差量；根据所述第一偏差信息与所述第二偏 差信息，确定所述极片基材的纠偏量。
本申请的实施例中，第一偏差信息与第二偏差信息确定极片基材的纠偏量，可以进一步优化纠偏结果。
在一些可能的实施例中，所述根据所述第一交集确定所述极片基材的纠偏量包括：根据所述涂布区边缘偏差信息和所述极片基材纠偏量，确定所述第一距离与所述第二距离的偏差量；在所述第一距离与所述第二距离的偏差量满足所述第一纠偏范围的情况下，将所述极片基材纠偏量确定为所述纠偏量。
本申请的实施例中，极片基材经过确定的纠偏量调整后，涂布区的第一距离与第二距离的偏差量可以符合标准允许的偏差范围。
在一些可能的实施例中，所述根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量包括：所述第一偏差信息与所述第二偏差信息满足如下预设条件中的一个或多个：所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；所述第二偏差量小于或等于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于或等于所述第一平均偏差量；根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
本申请的实施例中，设定预设条件，可以判断符合偏差调整范围的交集的备选纠偏量，其纠偏结果是否有改善，并从其中选取纠偏结果较好的纠偏量。
在一些可能的实施例中，所述根据所述涂布区边缘偏差信息和第 一纠偏范围确定第一偏差调整范围包括：在所述涂布区边缘偏差信息不满足所述第一纠偏范围的情况下，根据所述涂布区边缘偏差信息和所述第一纠偏范围确定第一偏差调整范围。
本申请的实施例中，若涂布区边缘偏差信息不满足第一纠偏范围，则认为第一距离与第二距离的偏差量超出标准允许的范围，因此需要对极片基材进行纠偏调整。
本申请第二方面提供了一种双面涂布的纠偏装置，所述装置包括：获取模块，用于在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到所述极片基材边缘的第一距离，所述纠偏横截面沿所述极片基材宽度方向与所述极片基材所在的平面垂直；在所述纠偏横截面上获取所述极片基材的第二表面上的涂布区边缘到所述极片基材边缘的第二距离，所述第二表面上的涂布区边缘与所述第一表面上的涂布区边缘一一对应。处理模块，用于根据所述第一距离和所述第二距离确定涂布区边缘偏差信息；根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围；在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的纠偏量。控制模块，用于根据所述极片基材的纠偏量控制极片基材的纠偏距离。
本申请的实施例中，处理模块通过偏差调整范围的交集确定的极片基材的纠偏量，可以使得涂布区边缘偏差信息在经过控制模块纠偏调整后符合标准要求。
在一些可能的实施例中，所述处理模块用于在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的 纠偏量包括：所述处理模块用于在所述第一偏差调整范围不存在交集的情况下，根据所述涂布区边缘偏差信息和第二纠偏范围确定第二偏差调整范围；在所述第二偏差调整范围存在第二交集的情况下，根据所述第二交集确定所述极片基材的纠偏量，其中，所述第二纠偏范围大于第一纠偏范围。
本申请的实施例中，在第一偏差调整范围不存在交集的情况下，处理模块根据第二交集确定极片基材的纠偏量，可以使得第一距离与第二距离的错位量减小。
在一些可能的实施例中，所述处理模块还用于根据所述第一交集确定所述极片基材的纠偏量包括：所述处理模块还用于根据所述涂布区边缘偏差信息，确定第一偏差信息，其中，所述第一偏差信息包括第一偏差量和第一平均偏差量；根据所述涂布区边缘偏差信息与备选纠偏量，确定第二偏差信息，其中，所述备选纠偏量满足所述偏差调整范围的交集，所述第二偏差信息包括第二偏差量和第二平均偏差量；根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
本申请的实施例中，处理模块根据第一偏差信息与第二偏差信息确定极片基材的纠偏量，可以进一步优化纠偏结果。
在一些可能的实施例中，所述处理模块还用于根据所述第一交集确定所述极片基材的纠偏量包括：所述处理模块用于根据所述涂布区边缘偏差信息和所述极片基材纠偏量，确定所述第一距离与所述第二距离的偏差量；在所述第一距离与所述第二距离的偏差量满足所述第 一纠偏范围的情况下，将所述极片基材纠偏量确定为所述纠偏量。
本申请的实施例中，极片基材经过处理模块确定的纠偏量调整后，涂布区的第一距离与第二距离的偏差量可以符合标准允许的偏差范围。
在一些可能的实施例中，所述处理模块还用于根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量包括：所述第一偏差信息与所述第二偏差信息满足如下预设条件中的一个或多个：所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；所述第二偏差量小于或等于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于或等于所述第一平均偏差量。所述处理模块根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
本申请的实施例中，处理模块设定预设条件，可以判断符合偏差调整范围的交集的备选纠偏量，其纠偏结果是否有改善，并从其中选取纠偏结果较好的纠偏量。
在一些可能的实施例中，所述处理模块还用于，根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围包括：在所述涂布区边缘偏差信息不满足所述第一纠偏范围的情况下，所述处理模块根据所述涂布区边缘偏差信息和所述第一纠偏范围确定第一偏差调整范围。
本申请的实施例中，若涂布区边缘偏差信息不满足第一纠偏范围， 则处理模块认为第一距离与第二距离的偏差量超出标准允许的范围，因此需要对极片基材进行纠偏调整。
本申请第三方面提供了一种移相全桥电路的反向电流控制装置，包括存储器和处理器，所述存储器用于存储指令，所述处理器用于读取所述指令并基于所述指令执行上述第一方面和第一方面的任意可能的实现方式中的方法。
本申请第四方面提供了一种双面涂布的纠偏机构，包括上述第二或三方面的双面涂布的纠偏装置。
本申请第五方面提供了一种可读存储介质，用于存储计算机程序，所述计算机程序用于执行上述第一方面和第一方面的任意可能的实现方式中的方法。
附图说明
图1是本申请一实施例公开的双面涂布纠偏方法的示意性流程图；
图2是本申请一实施例公开双面涂布示意图；
图3是本申请一实施例公开的双面涂布纠偏方法的示意性流程图；
图4是本申请另一实施例公开的双面涂布的纠偏装置的示意性框图。
具体实施方式
下面将结合附图对本申请技术方案的实施例进行详细的描述。以下实施例仅用于更加清楚地说明本申请的技术方案，因此只作为示例，而不能以此来限制本申请的保护范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同；本文中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请；本申请的说明书和权利要求书及上述附图说明中的术语“包括”和“具有”以及它们的任何变形，意图在于覆盖不排他的包含。
在本申请实施例的描述中，技术术语“第一”“第二”等仅用于区别不同对象，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量、特定顺序或主次关系。在本申请实施例的描述中，“多个”的含义是两个以上，除非另有明确具体的限定。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本申请的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
在本申请实施例的描述中，术语“和/或”仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
在本申请实施例的描述中，术语“多个”指的是两个以上(包括两个)，同理，“多组”指的是两组以上(包括两组)，“多片”指的是两片以上(包括两片)。
在本申请实施例的描述中，技术术语“中心”“纵向”“横向”“长度”“宽度”“厚度”“上”“下”“前”“后”“左”“右”“竖直”“水平”“顶”“底”“内”“外”“顺时针”“逆时针”“轴向”“径向”“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请实施例和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请实施例的限制。
在本申请实施例的描述中，除非另有明确的规定和限定，技术术语“安装”“相连”“连接”“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；也可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请实施例中的具体含义。
目前，从市场形势的发展来看，动力电池的应用越加广泛。动力电池不仅被应用于水力、火力、风力和太阳能电站等储能电源系统，而且还被广泛应用于电动自行车、电动摩托车、电动汽车等电动交通工具，以及军事装备和航空航天等多个领域。随着动力电池应用领域的不断扩大，其市场的需求量也在不断地扩增。因此提高动力电池生 产工艺，将直接影响到电池的安全性和稳定性。
本发明人注意到，在电池的生产制造中，涂布工序是至关重要的一环。在涂布过程中，由于涂布模头喷嘴压力等原因，会使极片的涂布结果出现偏差，当极片涂布区正反面错位量超出一定范围，若没有及时发现进行纠偏调整，将严重影响电池安全性能，也将严重增加产品的废品率，增大制造成本。
由于不同的生产需要，在极片上可能只有一个涂布区，也可能有多个涂布区。为了改善极片涂布偏移的问题，申请人研究发现，可以通过控制策略对涂布偏移问题进行改善。具体为通过纠偏方法将涂布区正反面的偏移量控制在合格的范围内。
在这样的纠偏方法中，可以考虑到不同涂布区正反面的偏移量，有效保障极片的生产品质。
本申请实施例公开的双面涂布纠偏方法、装置，可以但不限于车辆、船舶或飞行器等用电装置中极片的生产制造中。可以使用剧本本申请公开的双面涂布纠偏方法、装置等组成的涂布设备，这样，有利于改善双面涂布偏移的问题，提升极片生产的良品率。
本申请实施例提供一种用电装置，该用电装置中的极片使用双面涂布纠偏方法制造。用电装置可以为但不限于手机、平板、笔记本电脑、电动玩具、电动工具、电瓶车、电动汽车、轮船、航天器等等。其中，电动玩具可以包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等，航天器可以包括飞机、火箭、航天飞机和宇宙飞船等等。
电池单体包括电极组件和电解液，电极组件由正极片、负极片和隔离膜组成。电池单体主要依靠金属离子在正极片和负极片之间移动来工作。正极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面，未涂敷正极活性物质层的集流体凸出于已涂覆正极活性物质层的集流体，未涂敷正极活性物质层的集流体可以作为正极极耳。以锂离子电池为例，正极集流体的材料可以为铝，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面，未涂敷负极活性物质层的集流体凸出于已涂覆负极活性物质层的集流体，未涂敷负极活性物质层的集流体可以作为负极极耳。负极集流体的材料可以为铜，负极活性物质可以为碳或硅等。
图1是本申请一实施例公开的双面涂布纠偏方法的示意性流程图。
步骤101，在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到极片基材边缘的第一距离，纠偏横截面沿极片基材宽度方向与极片基材所在的平面垂直。
纠偏横截面是指极片基材的横截面。纠偏横截面可以在沿极片基材的宽度方向上，与极片基材所在的平面相垂直。
极片可以包括正极极片与负极极片。极片基材可以包括正极集流体与负极集流体。
极片基材边缘是指极片基材在长度方向上的边缘。可以是极片基材在长度方向上的其中任意一边或者两边，本实施例对此并不限定。
第一表面是指极片基材上涂覆活性物质层的其中一个表面，可以是极片基材的正面，也可以是极片基材的反面，本实施例对此并不限定。第二表面是指极片基材上与第一表面相对应的一面。
涂布区是指涂敷活性物质层的区域。涂布区边缘是指涂布区长度方向上的边缘，可以是涂布区在长度方向上的一边，本实施例对此并不限定。
第一距离是指第一表面上的涂布区两侧边缘到极片基材其中一侧边缘的宽度方向的距离。
步骤102，在纠偏横截面上获取极片基材的第二表面上的涂布区边缘到极片基材边缘的第二距离，第二表面上的涂布区边缘与第一表面上的涂布区边缘一一对应。
第二距离是指第二表面上的涂布区两侧边缘到极片基材其中一侧边缘的宽度方向的距离。可选地，确定第二距离与第一距离，选取极片基材同一侧的边缘。
在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到极片基材边缘的第一距离，以及获取极片基材的第二表面上的涂布区边缘到极片基材边缘的第二距离，可以是根据成像装置实时获取纠偏横截面上的第一距离以及第二距离的长度，也可以停机后根据人工手动测量获取纠偏横截面上的第一距离以及第二距离的长度，具体获取方法本实施例并不限定。
步骤103，根据第一距离和第二距离确定涂布区边缘偏差信息。
涂布区边缘偏差信息是指第一表面各个涂布区的边缘与相对应 的第二表面各个涂布区的边缘的偏移量。第一表面的各个涂布区的边缘到极片基材边缘的距离可以表示为D 1、D 2……D n，与第二表面的各个涂布区的边缘到极片基材边缘的距离可以表示为D 1’、D 2’……D n’。涂布区边缘偏差信息可以表示为W 1＝D 1-D 1’，W2＝D 2-D 2’，W n＝D n-D n’。图2示出了第一表面有两个涂布区，第二表面有两个对应的涂布区的一种可选的实施例的情况示意图。
步骤104，根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围。
第一纠偏范围是指在动力电池的生产制造中，所允许的极片涂布偏移范围。该偏移范围可以是国家标准，也可以是公司标准、行业标准、在电池的生产制造中所允许的极片双面涂布的最大错位量等，本实施例对此并不限定。
第一偏差调整范围是指为了将涂布区边缘偏差信息调整到第一纠偏范围内，需要对极片基材进行纠偏调整的范围。例如，涂布区边缘偏差信息为W 1＝D 1-D 1’，……，W n＝D n-D n’。当所要求的第一纠偏范围为(-0.8,0.8)(单位：毫米mm)的情况下，则偏差调整范围可以表示为Range(1)∈(-0.8-W 1，0.8+W 1)，……，Range(n)∈(-0.8-W n，0.8+W n)，单位：毫米mm。
步骤105，在第一偏差调整范围存在第一交集的情况下，根据第一交集确定极片基材的纠偏量。
第一交集是指第一偏差调整范围的交集。当极片上只有一个涂布区的情况下，则第一交集可以为第一偏差调整范围。
极片基材的纠偏量是指极片基材在宽度方向上所要调整的距离。极片基材的纠偏量满足偏差调整范围的交集。极片基材的纠偏量可以是偏差调整范围的交集内的端点值、任意数值、确定的数值等等，本实施例对此并不限定。可选地，纠偏量可以在偏差调整范围的交集内每间隔一定的比例取值，比如纠偏量的取值间隔比例可以是0.05mm等，本实施例对此并不限定。
极片基材的纠偏方向是指在极片基材的宽度方向上进行纠偏调整。极片基材的一侧边缘到涂布区两侧的距离确定第一距离，当纠偏量为正数的情况下，则往涂布区边缘远离该侧极片基材边缘的方向进行纠偏。当纠偏量为正数的情况下，则往涂布区边缘靠近该侧极片基材边缘的方向进行纠偏。
本申请实施例中，通过获取极片基材的第一表面上的涂布区边缘到极片基材边缘的第一距离与极片基材的第二表面上的涂布区边缘到极片基材边缘的第二距离，确定涂布区边缘偏差信息，再结合第一纠偏范围确定偏差调整范围，根据偏差调整范围的交集，确定极片基材的纠偏量。可以使得涂布区边缘偏差信息在经过纠偏调整后符合标准要求。
图3是本申请实施例公开的双面涂布纠偏方法的示意性流程图。本申请实施例与前述实施例中类似的步骤可以参考前述实施例，为了简洁，在此不再赘述。
在本申请的一些实施例中，可选地，在第一偏差调整范围存在第一交集的情况下，根据第一交集确定极片基材的纠偏量，包括：
在第一偏差调整范围不存在交集的情况下，根据涂布区边缘偏差信息和第二纠偏范围确定第二偏差调整范围。在第二偏差调整范围存在第二交集的情况下，根据第二交集确定极片基材的纠偏量，其中，第二纠偏范围大于第一纠偏范围。
可选地，当第二偏差调整范围不存在第二交集的情况下，根据涂布区边缘偏差信息和第三纠偏范围确定第三偏差调整范围。在第三偏差调整范围存在第三交集的情况下，根据第三交集确定极片基材的纠偏量，其中，第三纠偏范围大于第二纠偏范围。
可选地，当第三偏差调整范围不存在第三交集的情况下，根据涂布区边缘偏差信息和第四纠偏范围确定第四偏差调整范围。在第四偏差调整范围存在第四交集的情况下，根据第四交集确定极片基材的纠偏量，其中，第四纠偏范围大于第三纠偏范围。
可选地，当第四偏差调整范围不存在第三交集的情况下，根据涂布区边缘偏差信息和第五纠偏范围确定第五偏差调整范围。在第五偏差调整范围存在第五交集的情况下，根据第五交集确定极片基材的纠偏量，其中，第五纠偏范围大于第四纠偏范围。
可选地，可以将第一纠偏范围逐渐扩大到第n纠偏范围，直到第n偏差调整范围出现第n交集为止。根据第n交集确定极片基材的纠偏量，其中，n为正整数。
可选地，第一纠偏范围逐渐扩大到第n纠偏范围的过程中，纠偏范围每次扩大的大小，可以是0.1mm、0.2mm或者0.3mm等等，本实施例对此并不限定。比如，可以将第一纠偏范围每次扩大0.1mm， 则第一纠偏范围为(-0.7,0.7)，第二纠偏范围为(-0.8,0.8)，第三纠偏范围为(-0.9,0.9)，单位：毫米。
可选地，第一纠偏范围逐渐扩大到第n纠偏范围，第n纠偏范围不超过[-2,2]，单位：毫米。将第n纠偏范围限定在不超过[-2,2]，是为了使得调整后的第一距离与第二距离的错位量仍能符合最低制造标准的要求。其中，最低制造标准可以包括在电池的生产制造中所允许的极片双面涂布的最大错位量。
在本申请实施例中，在第一偏差调整范围不存在交集的情况下，根据第n交集确定极片基材的纠偏量，可以使得第一距离与第二距离的错位量减小。
在本申请的一些实施例中，可选地，根据第一交集确定极片基材的纠偏量，包括：
根据涂布区边缘偏差信息，确定第一偏差信息，其中，第一偏差信息包括第一偏差量和第一平均偏差量。
根据涂布区边缘偏差信息与备选纠偏量，确定第二偏差信息，其中，备选纠偏量满足偏差调整范围的交集，第二偏差信息包括第二偏差量和第二平均偏差量。
根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量。
第一偏差量是指涂布区初始最大边缘偏差信息m。第一平均偏差量是指涂布区初始平均边缘偏差信息n。第二偏差量是指根据偏差调整范围的交集，对涂布区边缘偏差信息进行调整后得到的涂布区最大边缘偏差信息m 1。第二平均偏差量是指根据偏差调整范围的交集， 对涂布区边缘偏差信息进行调整后得到的涂布区平均偏差信息n 1。
第一偏差量可以表示为：m＝Max(|W 1|,|W 2|,……，|W n|)，即边缘偏差信息中的绝对值的最大值。第一平均偏差量可以表示为：n＝Mean(|W 1|,|W 2|,……，|W n|)，即边缘偏差信息的绝对值的平均值。
第二偏差量可以表示为：m 1＝Max(|W 1+x|,|W 2+x|,……，|W n+x|)。第二平均偏差量可以表示为：n 1＝Mean(|W 1+x|,|W 2+x|,……，|W n+x|)。其中，x是指备选纠偏量，x满足偏差调整范围的交集，x可以在偏差调整范围的交集内每间隔一定的比例取值。x的间隔比例取值可以与纠偏精度相关，比如x的间隔比例取值可以是0.05mm。然后依次迭代计算，获取相应的m 1、n 1的数值。例如，当确定的偏差调整范围的交集为[-0.2mm,0.1mm],则x的取值可以为-0.2，-0.15，-0.1，-0.05,0，0.05,0.1(单位：毫米mm)。
根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量是指在得到的多组m 1、n 1数值中，选取其中最趋近于零的一组m 1、n 1，则确定该组m 1、n 1的x的值，为极片基材的纠偏量。
在本申请实施例中，在得到的多组m 1、n 1数值中，选取其中最趋近于零的一组m 1、n 1，可以进一步优化纠偏结果。
在本申请的一些实施例中，可选地，根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量，包括：
第一偏差信息与第二偏差信息满足如下预设条件中的一个或多个：
第二偏差量小于第一偏差量且第二平均偏差量小于第一平均偏 差量；
第二偏差量小于或等于第一偏差量且第二平均偏差量小于第一平均偏差量；
第二偏差量小于第一偏差量且第二平均偏差量小于或等于第一平均偏差量。
根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量。
第一偏差信息与第二偏差信息包括以下至少一种预设条件：m 1<m且n 1<n；m 1≤m且n 1<n；m 1<m且n 1≤n。
根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量是指在所有符合预设条件的m 1、n 1中，确定其中者最趋近于零的一组m 1、n 1。则确定该组m 1、n 1的备选纠偏量x的值，为极片基材的纠偏量。
例如，当极片基材上有2个涂布区的情况下，假设确定的涂布区边缘偏差信息为W 1＝0.8，W 2＝-0.2，W 3＝0.3，W 4＝-0.4。
令第一纠偏范围为[-0.8,0.8]，则偏差调整范围为：
W 1→Range1:[-1.6,0]，
W 2→Range2:[-0.6,1]，
W 3→Range3:[-1.1,0.5]，
W 4→Range1:[-1.6,0]。
可得偏差调整范围的交集为：Range＝[-0.4,0]。则第二系数x的取值可以为-0.4,-0.35,-0.3,-0.25,-0.2,-0.15,-0.1,-0.05,0。
m＝Max(|W 1|,|W 2|,|W 3|,|W 4|)＝Max(0.8,0.2,0.3,0.4)＝0.8；
n＝Mean(|W 1|,|W 2|,|W 3|,|W 5|)＝Mean(0.8,0.2,0.3,0.4)＝(0.8+0.2+0.3+0.4)/4＝0.425；；
当x的取值为-0.4的情况下，
m 1＝Max(|W 1+x|,|W 2+x|,|W 3+x|,|W 4+x|)
＝Max(0.4,0.6,0.1,0.8)＝0.8
n 1＝Mean(|W 1+x|,|W 2+x|,|W 3+x|,|W 4+x|)
＝Mean(0.4,0.6,0.1,0.8)＝(0.4+0.6+0.1+0.8)/4
＝0.475
则当x的取值为-0.4的情况下，m 1＝m，n 1>n，不符合预设条件。
同理，当x的取值为-0.35的情况下，m 1＝0.75，n 1＝0.45，则m 1<m，n 1>n，不符合预设条件。
同理，当x的取值为-0.3的情况下，m 1＝0.7，n 1＝0.425，则m 1<m，n 1＝n，符合预设条件。
同理，当x的取值为-0.25的情况下，m 1＝0.65，n 1＝0.425，则
m 1<m，n 1＝n，符合预设条件。
同理，当x的取值为-0.2的情况下，m 1＝0.6，n 1＝0.425，则m 1<m，n 1＝n，符合预设条件。
同理，当x的取值为-0.15的情况下，m 1＝0.65，n 1＝0.425，则
m 1<m，n 1＝n，符合预设条件。
同理，当x的取值为-0.1的情况下，m 1＝0.7，n 1＝0.425，则m 1<m，n 1＝n，符合预设条件。
同理，当x的取值为-0.05的情况下，m 1＝0.75，n 1＝0.425，则
m 1<m，n 1＝n，符合预设条件。
同理，当x的取值为0的情况下，m 1＝0.8，n 1＝0.425，则m 1＝m，n 1＝n，不符合预设条件。
综上，当x的取值为-0.2的情况下，m 1＝0.6，n 1＝0.425，则m 1、n 1为其中最趋近于零的一组m 1、n 1，极片基材的纠偏量为-0.2。
在本申请实施例中，设定预设条件，可以判断符合偏差调整范围的交集的备选纠偏量，其纠偏结果是否有改善，并从其中选取纠偏结果较好的纠偏量。
在本申请的一些实施例中，可选地，根据第一交集确定极片基材的纠偏量，包括：
根据涂布区边缘偏差信息和极片基材纠偏量，确定第一距离与第二距离的偏差量。在第一距离与第二距离的偏差量满足第一纠偏范围的情况下，将极片基材纠偏量确定为纠偏量。
根据涂布区边缘偏差信息和极片基材纠偏量，确定第一距离与第二距离的偏差量是指将确定的极片基材的纠偏量，与涂布区边缘偏差信息相结合，判断经过该确定的极片基材的纠偏量调整后的涂布区边缘偏差信息，即第一距离与第二距离的偏差量，判断该偏差量是否满足第一纠偏范围，若满足，则将极片基材纠偏量确定为纠偏量。
在本申请实施例中，极片基材经过确定的纠偏量调整后，涂布区的第一距离与第二距离的偏差量可以符合标准允许的偏差范围。
在本申请的一些实施例中，可选地，根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围，包括：
在涂布区边缘偏差信息不满足第一纠偏范围的情况下，根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围。
在本申请实施例中，若涂布区边缘偏差信息不满足第一纠偏范围，则认为第一距离与第二距离的偏差量超出标准允许的范围，因此需要对极片基材进行纠偏调整。
图4是本申请另一实施例公开的双面涂布的纠偏装置的示意性框图。在本申请的实施例中，双面涂布的纠偏装置可以包括获取模块401、处理模块402和控制模块403。本申请实施例与前述实施例中类似的步骤可以参考前述实施例，为了简洁，在此不再赘述。
获取模块401，用于在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到极片基材边缘的第一距离，纠偏横截面沿极片基材宽度方向与极片基材所在的平面垂直；在纠偏横截面上获取极片基材的第二表面上的涂布区边缘到极片基材边缘的第二距离，第二表面上的涂布区边缘与第一表面上的涂布区边缘一一对应。
处理模块402，用于根据第一距离和第二距离确定涂布区边缘偏差信息；根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围；在第一偏差调整范围存在第一交集的情况下，根据第一交集确定极片基材的纠偏量。
控制模块403，用于根据极片基材的纠偏量控制极片基材的纠偏距离。
本申请实施例中，通过获取模块401获取极片基材的第一表面上的涂布区边缘到极片基材边缘的第一距离与极片基材的第二表面上的涂布区边缘到极片基材边缘的第二距离。处理模块402确定涂布区边缘偏差信息，再结合第一纠偏范围确定偏差调整范围，处理模块402通过偏差调整范围的交集确定的极片基材的纠偏量，可以使得涂布区边缘偏差信息在经过控制模块403纠偏调整后符合标准要求。
在本申请的一些实施例中，可选地，处理模块402还用于，在第一偏差调整范围存在第一交集的情况下，根据第一交集确定极片基材的纠偏量，包括：
处理模块402用于在第一偏差调整范围不存在交集的情况下，根据涂布区边缘偏差信息和第二纠偏范围确定第二偏差调整范围；在第二偏差调整范围存在第二交集的情况下，根据第二交集确定极片基材的纠偏量，其中，第二纠偏范围大于第一纠偏范围。
可选地，当第二偏差调整范围不存在第二交集的情况下，处理模块402根据涂布区边缘偏差信息和第三纠偏范围确定第三偏差调整范围。在第三偏差调整范围存在第三交集的情况下，根据第三交集确定极片基材的纠偏量，其中，第三纠偏范围大于第二纠偏范围。
可选地，当第三偏差调整范围不存在第三交集的情况下，处理模块402根据涂布区边缘偏差信息和第四纠偏范围确定第四偏差调整范围。在第四偏差调整范围存在第四交集的情况下，根据第四交集确 定极片基材的纠偏量，其中，第四纠偏范围大于第三纠偏范围。
可选地，当第四偏差调整范围不存在第三交集的情况下，处理模块402根据涂布区边缘偏差信息和第五纠偏范围确定第五偏差调整范围。在第五偏差调整范围存在第五交集的情况下，根据第五交集确定极片基材的纠偏量，其中，第五纠偏范围大于第四纠偏范围。
可选地，处理模块402可以将第一纠偏范围逐渐扩大到第n纠偏范围，直到第n偏差调整范围出现第n交集为止。处理模块402根据第n交集确定极片基材的纠偏量，其中，n为正整数。
可选地，处理模块402在将第一纠偏范围逐渐扩大到第n纠偏范围的过程中，纠偏范围每次扩大的大小，可以是0.1mm、0.2mm或者0.3mm等等，本实施例对此并不限定。比如，处理模块402可以将第一纠偏范围每次扩大0.1mm，则第一纠偏范围为(-0.7,0.7)，第二纠偏范围为(-0.8,0.8)，第三纠偏范围为(-0.9,0.9)，单位：毫米。
可选地，处理模块402可以将第一纠偏范围逐渐扩大到第n纠偏范围，第n纠偏范围不超过[-2,2]，单位：毫米。
在本申请实施例中，在第一偏差调整范围不存在交集的情况下，处理模块402根据第n交集确定极片基材的纠偏量，可以使得第一距离与第二距离的错位量减小。
在本申请的一些实施例中，可选地，处理模块402还用于，根据第一交集确定极片基材的纠偏量，包括：
处理模块402还用于根据涂布区边缘偏差信息，确定第一偏差信息，其中，第一偏差信息包括第一偏差量和第一平均偏差量；
根据涂布区边缘偏差信息与备选纠偏量，确定第二偏差信息，其中，备选纠偏量满足偏差调整范围的交集，第二偏差信息包括第二偏差量和第二平均偏差量；
根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量。
处理模块402根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量是指在得到的多组m 1、n 1数值中，处理模块402选取其中最趋近于零的一组m 1、n 1，则处理模块402确定该组m 1、n 1的x的值，为极片基材的纠偏量。
在本申请实施例中，处理模块402在得到的多组m 1、n 1数值中，选取其中最趋近于零的一组m 1、n 1，可以进一步优化纠偏结果。
在本申请的一些实施例中，可选地，处理模块402还用于，根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量，包括：
第一偏差信息与第二偏差信息满足如下预设条件中的一个或多个：
第二偏差量小于第一偏差量且第二平均偏差量小于第一平均偏差量；
第二偏差量小于或等于第一偏差量且第二平均偏差量小于第一平均偏差量；
第二偏差量小于第一偏差量且第二平均偏差量小于或等于第一平均偏差量。
处理模块402根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量。
处理模块402判断第一偏差信息与第二偏差信息包括以下至少一种预设条件：m 1<m且n 1<n；m 1≤m且n 1<n；m 1<m且n 1≤n。
处理模块402根据第一偏差信息与第二偏差信息，确定极片基材的纠偏量是指在所有符合预设条件的m 1、n 1中，处理模块402确定其中者最趋近于零的一组m 1、n 1。则处理模块402确定该组m 1、n 1的x的值，为极片基材的纠偏量。
在本申请实施例中，处理模块402中设定预设条件，可以判断符合偏差调整范围的交集的备选纠偏量，其纠偏结果是否有改善，并从其中选取纠偏结果较好的纠偏量。
在本申请的一些实施例中，可选地，处理模块402还用于，根据第一交集确定极片基材的纠偏量，包括：
处理模块402用于根据涂布区边缘偏差信息和极片基材纠偏量，确定第一距离与第二距离的偏差量；
在第一距离与第二距离的偏差量满足第一纠偏范围的情况下，将极片基材纠偏量确定为纠偏量。
处理模块402根据涂布区边缘偏差信息和极片基材纠偏量，确定第一距离与第二距离的偏差量是指处理模块402将确定的极片基材的纠偏量与涂布区边缘偏差信息相结合，处理模块402判断经过该确定的极片基材的纠偏量调整后的涂布区边缘偏差信息，即第一距离与第二距离的偏差量，处理模块402判断该偏差量是否满足第一纠偏范围，若满足，则将极片基材纠偏量确定为纠偏量。控制模块403根据 该纠偏量对极片基材进行纠偏调整。
在本申请实施例中，控制模块403根据该纠偏量对极片基材进行纠偏调整，可以使得调整后的涂布区的第一距离与第二距离的偏差量，符合标准允许的偏差范围。
在本申请的一些实施例中，可选地，处理模块402还用于，根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围，包括：
在涂布区边缘偏差信息不满足第一纠偏范围的情况下，处理模块402根据涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围。
在本申请实施例中，若涂布区边缘偏差信息不满足第一纠偏范围，则处理模块402认为第一距离与第二距离的偏差量超出标准允许的范围，因此需要对极片基材进行纠偏调整。
本申请实施例还提供了另一种双面涂布的纠偏装置，该装置包括存储器和处理器，其中，存储器用于存储指令，处理器用于读取指令并基于指令执行前述本申请各种实施例的方法。
本申请实施例还提供了一种可读存储介质，用于存储计算机程序，计算机程序用于执行前述本申请各种实施例的方法。
本申请实施例还提供了一种双面涂布的纠偏机构，包括前述本申请实施例的双面涂布的纠偏装置。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的 特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (13)

  1. 一种双面涂布的纠偏方法，其特征在于：
    在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到所述极片基材边缘的第一距离，所述纠偏横截面沿所述极片基材宽度方向与所述极片基材所在的平面垂直；
    在所述纠偏横截面上获取所述极片基材的第二表面上的涂布区边缘到所述极片基材边缘的第二距离，所述第二表面上的涂布区边缘与所述第一表面上的涂布区边缘一一对应；
    根据所述第一距离和所述第二距离确定涂布区边缘偏差信息；
    根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围；
    在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的纠偏量。
  2. 根据权利要求1所述的方法，其特征在于，所述在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的纠偏量，包括：
    在所述第一偏差调整范围不存在交集的情况下，根据所述涂布区边缘偏差信息和第二纠偏范围确定第二偏差调整范围；在所述第二偏差调整范围存在第二交集的情况下，根据所述第二交集确定所述极片基材的纠偏量，其中，所述第二纠偏范围大于第一纠偏范围。
  3. 根据权利要求1或2中所述的方法，其特征在于，所述根据所述第一交集确定所述极片基材的纠偏量，包括：
    根据所述涂布区边缘偏差信息，确定第一偏差信息，其中，所述第一偏差信息包括第一偏差量和第一平均偏差量；
    根据所述涂布区边缘偏差信息与备选纠偏量，确定第二偏差信息，其中，所述备选纠偏量满足所述偏差调整范围的交集，所述第二偏差信息包括第二偏差量和第二平均偏差量；
    根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述根据所述第一交集确定所述极片基材的纠偏量，包括：
    根据所述涂布区边缘偏差信息和所述极片基材纠偏量，确定所述第一距离与所述第二距离的偏差量；
    在所述第一距离与所述第二距离的偏差量满足所述第一纠偏范围的情况下，将所述极片基材纠偏量确定为所述纠偏量。
  5. 根据权利要求3所述的方法，其特征在于，所述根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量，包括：
    所述第一偏差信息与所述第二偏差信息满足如下预设条件中的一个或多个：
    所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；
    所述第二偏差量小于或等于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；
    所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于或 等于所述第一平均偏差量；
    根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
  6. 根据权利要求1所述的方法，其特征在于，所述根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围，包括：
    在所述涂布区边缘偏差信息不满足所述第一纠偏范围的情况下，根据所述涂布区边缘偏差信息和所述第一纠偏范围确定第一偏差调整范围。
  7. 一种双面涂布的纠偏装置，其特征在于，包括：
    获取模块，用于在纠偏横截面上获取极片基材的第一表面上的涂布区边缘到所述极片基材边缘的第一距离，所述纠偏横截面沿所述极片基材宽度方向与所述极片基材所在的平面垂直；在所述纠偏横截面上获取所述极片基材的第二表面上的涂布区边缘到所述极片基材边缘的第二距离，所述第二表面上的涂布区边缘与所述第一表面上的涂布区边缘一一对应；
    处理模块，用于根据所述第一距离和所述第二距离确定涂布区边缘偏差信息；根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围；在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集确定所述极片基材的纠偏量；
    控制模块，用于根据所述极片基材的纠偏量控制极片基材的纠偏距离。
  8. 根据权利要求7所述的装置，其特征在于，所述处理模块还用于，在所述第一偏差调整范围存在第一交集的情况下，根据所述第一交集 确定所述极片基材的纠偏量，包括：
    所述处理模块用于在所述第一偏差调整范围不存在交集的情况下，根据所述涂布区边缘偏差信息和第二纠偏范围确定第二偏差调整范围；
    在所述第二偏差调整范围存在第二交集的情况下，根据所述第二交集确定所述极片基材的纠偏量，其中，所述第二纠偏范围大于第一纠偏范围。
  9. 根据权利要求7或8所述的装置，其特征在于，所述处理模块还用于，根据所述第一交集确定所述极片基材的纠偏量，包括：
    所述处理模块还用于根据所述涂布区边缘偏差信息，确定第一偏差信息，其中，所述第一偏差信息包括第一偏差量和第一平均偏差量；
    根据所述涂布区边缘偏差信息与备选纠偏量，确定第二偏差信息，其中，所述备选纠偏量满足所述偏差调整范围的交集，所述第二偏差信息包括第二偏差量和第二平均偏差量；
    根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
  10. 根据权利要求7至9中任一项所述的装置，其特征在于，所述处理模块还用于，根据所述第一交集确定所述极片基材的纠偏量，包括：
    所述处理模块用于根据所述涂布区边缘偏差信息和所述极片基材纠偏量，确定所述第一距离与所述第二距离的偏差量；
    在所述第一距离与所述第二距离的偏差量满足所述第一纠偏范围的情况下，将所述极片基材纠偏量确定为所述纠偏量。
  11. 根据权利要求9所述的装置，其特征在于，所述处理模块还用于， 根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量，包括：
    所述第一偏差信息与所述第二偏差信息满足如下预设条件中的一个或多个：
    所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；
    所述第二偏差量小于或等于所述第一偏差量且所述第二平均偏差量小于所述第一平均偏差量；
    所述第二偏差量小于所述第一偏差量且所述第二平均偏差量小于或等于所述第一平均偏差量；
    所述处理模块根据所述第一偏差信息与所述第二偏差信息，确定所述极片基材的纠偏量。
  12. 根据权利要求7所述的装置，其特征在于，所述处理模块还用于，根据所述涂布区边缘偏差信息和第一纠偏范围确定第一偏差调整范围，包括：
    在所述涂布区边缘偏差信息不满足所述第一纠偏范围的情况下，所述处理模块根据所述涂布区边缘偏差信息和所述第一纠偏范围确定第一偏差调整范围。
  13. 一种双面涂布的纠偏机构，其特征在于，包括权利要求7至12中任一项所述的双面涂布的纠偏装置。
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