WO2025236458A1 - 尺寸检测方法及装置、生产设备、计算设备、介质及产品 - Google Patents

尺寸检测方法及装置、生产设备、计算设备、介质及产品

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Publication number
WO2025236458A1
WO2025236458A1 PCT/CN2024/113990 CN2024113990W WO2025236458A1 WO 2025236458 A1 WO2025236458 A1 WO 2025236458A1 CN 2024113990 W CN2024113990 W CN 2024113990W WO 2025236458 A1 WO2025236458 A1 WO 2025236458A1
Authority
WO
WIPO (PCT)
Prior art keywords
winding
electrode
core
electrode assembly
length
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/CN2024/113990
Other languages
English (en)
French (fr)
Inventor
谭心勇
龚金成
李金旗
裴若槟
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.)
Contemporary Amperex Technology Co Ltd
Original Assignee
Contemporary Amperex Technology 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
Application filed by Contemporary Amperex Technology Co Ltd filed Critical Contemporary Amperex Technology Co Ltd
Publication of WO2025236458A1 publication Critical patent/WO2025236458A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/054—Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • This application relates to the field of battery technology, and in particular to size detection methods and apparatus, production equipment, computing devices, media and products.
  • This application aims to at least solve one of the technical problems existing in the background art. Therefore, one object of this application is to provide a dimensional inspection method and apparatus, production equipment, computing device, medium, and product to solve the problem of dimensional inspection of electrode assemblies.
  • An embodiment of the first aspect of this application provides a method for detecting the size of an electrode assembly, comprising: acquiring winding parameters during electrode winding; the winding parameters including the real-time winding radius of the core on the winding needle when a specific part of the electrode reaches a designated position, and the length of the unwound electrode between the core and the designated position; determining position information of the specific part wound to the surface of the core based on the winding parameters; the position information including the distance between the specific part and the winding axis of the core, and the angle between the line connecting the specific part and the winding axis of the core and a reference plane; the reference plane being a preset plane passing through the winding axis; and determining the size information of the electrode assembly obtained after the core winding is completed based on the position information, the size information including first size information corresponding to the shape of the electrode assembly, and/or second size information corresponding to the position of the specific part.
  • the size information of the wound electrode assembly can be identified in advance during the winding process. This is beneficial to timely detection of defects in the winding process, improve product yield, and since the detection results can be automatically adjusted according to changes in incoming materials, it can be applied to a variety of different specifications, has strong versatility, and does not need to be readjusted due to changes in the electrode assembly model, which helps to improve production efficiency.
  • obtaining the winding parameters during electrode winding includes: obtaining the unwinding length of the electrode over a preset time period; obtaining the rotation angle of the core within the preset time period; and determining the real-time winding radius based on the unwinding length and rotation angle.
  • the dimensional detection method further includes: determining the electrode thickness on the core corresponding to the number of electrode turns based on the real-time winding radius of the core and the number of electrode turns wound on the core. This embodiment can calculate the corresponding electrode thickness change by changing the real-time winding radius, which is beneficial for timely detection of electrode thickness abnormalities or winding abnormalities, thereby improving the winding quality of the electrode assembly.
  • obtaining the winding parameters during electrode winding further includes: obtaining positioning information of a specified position relative to the winding axis of the core; and determining the length of the unwound electrode based on the positioning information and the real-time winding radius. This helps to accurately determine the position of a specific part wound onto the core surface, thereby improving the accuracy of the dimensional calculation results.
  • a fixed roller that contacts the electrode sheet is further provided between the designated position and the winding axis of the core;
  • the positioning information includes the position information of the designated position, the position information of the axis of the fixed roller, and the position information of the winding axis; and wherein determining the length of the unwound electrode sheet according to the positioning information and the real-time winding radius includes: determining a first distance from the designated position to the axis of the fixed roller and a second distance from the axis of the fixed roller to the winding axis according to the positioning information; determining the length of the unwound electrode sheet according to the first distance, the radius of the fixed roller, the second distance, and the real-time winding radius, wherein the length of the unwound electrode sheet includes a first length between the designated position and the fixed roller, a second length between the fixed roller and the core, and a third length for the electrode sheet to adhere to the surface of the fixed roller.
  • the specific location is situated on the tab of the electrode sheet
  • the second dimensional information includes one or more of the following: tab width, tab misalignment, tab edge distance, and positive and negative tab spacing in the electrode assembly.
  • the geometric dimensions of the tabs can more accurately determine the second dimension information corresponding to the tabs, which is beneficial for timely assessment of whether the position or size of the tabs is abnormal during the winding process, and whether it can meet the production design requirements, thereby ensuring the battery production yield.
  • determining the dimensional information of the electrode assembly obtained after the core winding is completed based on the position information further includes: determining the maximum tab misalignment of the electrode assembly based on the dimensional information; wherein, the maximum tab misalignment is the maximum misalignment distance between tabs with different numbers of electrode turns in the electrode assembly along the width direction of the electrode assembly. Calculating the maximum misalignment distance using the second dimensional information corresponding to the tabs allows for a more intuitive assessment of the tab error level during the winding process, thereby accurately evaluating the winding quality of the electrode assembly and improving the production yield of the electrode assembly.
  • An embodiment of the second aspect of this application provides a size detection device for an electrode assembly, comprising: a parameter acquisition unit configured to acquire winding parameters during electrode winding; the winding parameters including the real-time winding radius of the core when a specific portion of the electrode reaches a designated position, and the length of the unwound electrode between the core and the designated position; a position determination unit configured to determine position information of the specific portion wound onto the surface of the core based on the winding parameters; the position information including the distance between the specific portion and the winding axis of the core, and the angle between the line connecting the specific portion and the winding axis of the core and a reference plane; the reference plane being a preset plane passing through the winding axis; and a size determination unit configured to determine the size information of the electrode assembly obtained after the core winding is completed based on the position information, the size information including first size information corresponding to the shape of the electrode assembly, and/or second size information corresponding to the position of the specific portion.
  • the parameter acquisition unit includes a first detection unit and a second detection unit.
  • the first detection unit is used to detect the unwinding length of the electrode sheet within a preset time period; the second detection unit is used to detect the rotation angle of the core within the preset time period.
  • the parameter acquisition unit further includes a third detection unit, which is arranged at a designated location to detect whether a specific part has reached a designated position.
  • a third detection unit which is arranged at a designated location to detect whether a specific part has reached a designated position.
  • An embodiment of the third aspect of this application provides a battery production apparatus, comprising: a winding assembly including a winding needle that rotates about a winding axis; an electrode unwinding assembly including an unwinding roller for unwinding electrode sheets, wherein the electrode sheets are unwound and then wound onto the winding needle to form a core; and a size detection device as described above, the size detection device being used to calculate the size information of the electrode assembly obtained after the core winding is completed.
  • An embodiment of the fourth aspect of this application provides a computing device, comprising: at least one processor; and at least one memory communicatively connected to the at least one processor, the at least one memory storing instructions which, when invoked...
  • the computing device performs the training method or battery failure prediction method described in the above embodiments.
  • An embodiment of the fifth aspect of this application provides a computer-readable storage medium storing instructions that, when executed individually or jointly by one or more processors of a computing device, cause the computing device to perform the training method or battery failure prediction method described in the above embodiments.
  • An embodiment of the sixth aspect of this application provides a computer program product including instructions that, when executed individually or jointly by one or more processors of a computing device, cause the computing device to perform the training method or battery failure prediction method described in the above embodiments.
  • Figure 1 is a flowchart of a method for detecting the size of an electrode assembly provided in some embodiments of this application;
  • Figure 2 is a schematic diagram of the dimension detection during the winding process of the electrode assembly provided in some embodiments of this application;
  • Figure 3 is a schematic diagram of a specific portion of the winding onto the surface of the core provided in some embodiments of this application;
  • Figure 4 is a schematic diagram of calculating the real-time winding radius of the core according to some embodiments of this application.
  • Figure 5 is a schematic diagram of the flattened electrode assembly in some embodiments of this application.
  • FIG. 6 is a structural block diagram of an electrode assembly size detection device provided in some embodiments of this application.
  • Figure 7 is a schematic diagram of the production equipment for electrode assemblies provided in some embodiments of this application.
  • Size detection method 100 size detection device 200, electrode unwinding assembly 300, winding assembly 400;
  • the term "and/or” is merely a description of the relationship between related objects, indicating that three relationships can exist.
  • a and/or B can represent: A existing alone, A and B existing simultaneously, and B existing alone.
  • the character "/" in this document generally indicates that the preceding and following related objects have an "or" relationship.
  • multiple refers to two or more (including two), similarly, “multiple sets” refers to two or more (including two sets), and “multiple pieces” refers to two or more (including two pieces).
  • Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.
  • a single battery cell is the smallest unit that makes up a battery, while the electrode assembly is the component in which the electrochemical reaction occurs within the battery cell.
  • the electrode assembly is formed by stacking and winding positive electrode plates, negative electrode plates, and a separator. During the winding process, it is necessary to perform dimensional checks, or dimensional predictions, on the winding parameters of the electrode assembly. This involves pre-estimating the external dimensions of the electrode assembly and the dimensions related to the tab positions to ensure that the electrode assembly produced using the current manufacturing process and control parameters meets the process requirements.
  • identification models need to be established for the different dimensions of different parts of the battery module.
  • identification models are subject to many limiting factors. For example, changes in the model and specifications of the battery cells, changes in the parameters of the winding equipment, or changes in the parameters of the incoming materials can all lead to distortion of the detection results of the identification model. Readjusting or replacing them is time-consuming and labor-intensive, affecting the production efficiency of the electrode module.
  • this application proposes a method for detecting the dimensions of an electrode assembly.
  • the method includes: acquiring winding parameters during electrode winding; these parameters include the real-time winding radius of the core on the winding needle when a specific portion of the electrode reaches a designated position, and the length of the unwound electrode between the core and the designated position; determining the position information of the specific portion wound onto the core surface based on the winding parameters; the position information includes the distance between the specific portion and the winding axis of the core, and the angle between the line connecting the specific portion and the winding axis of the core and a reference plane; the reference plane is determined based on the extension direction of the winding axis and the extension direction of the needle-pulling hole; and determining the dimensional information of the electrode assembly obtained after the core winding is completed based on the position information.
  • This dimensional detection method can detect the dimensions of the electrode assembly in real time, promptly identify defects during the winding process, and its detection accuracy is unaffected by other factors, exhibiting
  • the battery cells disclosed in this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft.
  • a power system for such an electrical device can be constructed using battery cells and batteries disclosed in this application.
  • a battery consists of a casing and individual battery cells, with the individual cells housed within the casing.
  • a battery can contain multiple individual cells, which can be connected in series, parallel, or a combination thereof.
  • a combination of series and parallel connections refers to multiple individual cells being connected in both series and parallel configurations.
  • multiple individual cells can be directly connected in series, parallel, or a combination thereof, and then the entire assembly is housed within the casing.
  • Each battery cell can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these.
  • the battery cell can be cylindrical, flat, cuboid, or other shapes.
  • Electrode assemblies are the components within a single battery cell where electrochemical reactions occur.
  • the casing may contain one or more electrode assemblies. Electrode assemblies are primarily formed by winding or stacking positive and negative electrode plates, typically with a separator between them.
  • the portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly, while the portions without active material each form a tab.
  • the positive and negative tabs can be located together at one end of the main body or separately at both ends. During charging and discharging, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.
  • Figure 1 is a flowchart of a method for detecting the size of an electrode assembly provided in some embodiments of this application.
  • Figure 2 is a schematic diagram of the size detection process of an electrode assembly during winding provided in some embodiments of this application.
  • Figure 3 is a schematic diagram of a specific part being wound onto the surface of the core provided in some embodiments of this application.
  • This application provides a method 100 for detecting the size of an electrode assembly, which includes:
  • Step S110 Obtain the winding parameters during electrode winding; the winding parameters include the real-time winding radius of the core on the winding needle when a specific part of the electrode reaches the specified position, and the length of the electrode that is not wound between the core and the specified position.
  • Step S120 Determine the position information of a specific part wound onto the surface of the core according to the winding parameters; the position information includes the distance between the specific part and the winding axis of the core, and the angle between the line connecting the specific part and the winding axis of the core and the reference plane; the reference plane is a preset plane passing through the winding axis.
  • Step S130 Determine the size information of the electrode assembly obtained after the core winding is completed based on the position information.
  • the size information includes first size information corresponding to the shape of the electrode assembly and/or second size information corresponding to the location of a specific part.
  • the electrode here can be either a positive or negative electrode.
  • the electrode emerges from the unwinding roller and is conveyed to the surface of the winding needle for winding.
  • the specific location on the electrode can be any designated position, determined based on the object being inspected. This designated position is located between the unwinding roller and the winding needle, and is positioned along the movement path of the specific part of the electrode during the conveying process.
  • the positive electrode 11 and the negative electrode 12 are wound onto the surface of the winding needle 13 to form a core.
  • the diameter of the core gradually increases.
  • the electrode assembly is obtained.
  • the positive electrode 11 will pass through a designated position P during the transmission process.
  • the specific part Q of the positive electrode 11 can be a specific area or a specific position on a tab.
  • the electrode length L refers to the length of the electrode from the designated position P to the winding tangent point of the core.
  • the position information in step S120 refers to the position information of the specific part Q on the core after it is wound onto the core.
  • the position information is information related to this specific position, such as radius position information and angle position information.
  • the radius position information can be represented by the distance of the specified part from the winding axis O of the core, that is, the real-time winding radius R corresponding to the specific part Q when it is wound onto the core.
  • the angle position information can be represented by the angle ⁇ between the line connecting the specific part Q and the winding axis O and the reference plane M.
  • the reference plane M is any pre-selected plane passing through the winding axis O.
  • the reference plane M may be a plane determined by the winding axis O and the position of the needle-pulling hole 131 on the surface of the winding needle 13.
  • the dimensional information of the wound electrode assembly can be further obtained based on the relationship between the specific location Q and other components or locations in the electrode assembly.
  • the electrode assembly can be cylindrical or a racetrack shape formed by flattening a cylinder.
  • the first dimensional information can be the radius or diameter of the cylindrical electrode assembly, or the width, thickness, etc., of the flattened racetrack-shaped electrode assembly.
  • the second dimensional information can be the relevant dimensional information of the specific location in the wound electrode assembly, which can be calculated based on the positional information of the specific location.
  • the distance of the specific location from a specific reference position of the electrode assembly can be the mid-section of the electrode assembly; or, if there are multiple specific locations, the second dimensional information can be the distance of each specific location from a reference surface, or the relative distance between multiple specific locations, etc.
  • the size information of the wound electrode assembly can be identified in advance during the winding process. This helps to detect defects in the winding process in a timely manner, improve the product yield, and since the detection results can be automatically adjusted according to changes in incoming materials, it can be applied to a variety of different specifications, has strong versatility, and does not need to be readjusted due to changes in the electrode assembly model, which helps to improve production efficiency.
  • Figure 4 is a schematic diagram of calculating the real-time winding radius of the core according to some embodiments of this application.
  • step S110 includes: obtaining the unwinding length ⁇ L of the electrode sheet within a preset time period; obtaining the rotation angle ⁇ of the core within the preset time period; and determining the real-time winding radius R based on the unwinding length and the rotation angle.
  • the preset time period can be a time interval set in advance by the user.
  • the unwinding length ⁇ L can be detected using an encoder to record the length value; specifically, a length encoder can be used to detect the length of the electrode unwinding within the preset time period.
  • the rotation angle ⁇ of the core can be detected using an angle encoder; specifically, it can be determined by detecting the rotation angle of the winding roller within the preset time period.
  • the real-time winding radius of the core on the winding needle 13 during the winding process can be calculated. This is unaffected by changes in material parameters and electrode assembly, and has strong versatility.
  • the size detection method 100 further includes: determining the electrode thickness on the core corresponding to the number of electrode turns based on the real-time winding radius R of the core and the number of electrode turns wound on the core.
  • the calculated real-time winding radius can be used to deduce the corresponding electrode thickness.
  • the electrode thickness for each turn can be calculated based on the real-time winding radius corresponding to different numbers of turns.
  • This embodiment can calculate the corresponding electrode thickness change by changing the real-time winding radius R, which is helpful to detect abnormal electrode thickness or winding abnormalities in a timely manner, thereby improving the winding quality of the electrode assembly.
  • step S110 includes: obtaining positioning information of the specified position P relative to the winding axis O of the core; and determining the unwound electrode length L based on the positioning information and the real-time winding radius R.
  • the positioning information includes the position information of the designated position P and the winding axis O.
  • a spatial coordinate system can be established, and the position coordinates of the designated position P and the winding axis O can be determined respectively.
  • the unwound electrode length L is the length between one end of the electrode located at the designated position P and the other end located at the tangent point on the core.
  • This embodiment can calculate and update the length L of the unwound electrode in real time based on the real-time winding radius R. This helps to accurately determine the position of a specific part wound onto the core surface, thereby improving the accuracy of the dimensional calculation results.
  • a fixed roller 21 that contacts the electrode sheet is further provided between the designated position P and the winding axis O of the core; the positioning information includes the position information of the designated position P, the position information of the axis of the fixed roller 21, and the position information of the winding axis O.
  • determining the unwound electrode length L based on positioning information and the real-time winding radius R includes:
  • the unwound electrode length L is determined based on the first distance D1, the radius R2 of the fixed roller 21, the second distance D2, and the real-time winding radius R1.
  • the unwound electrode length L includes a first length L1 located between the designated position P and the fixed roller 21, a second length L2 located between the fixed roller 21 and the core, and a third length L3 where the electrode is in contact with the surface of the fixed roller 21.
  • the fixed roller 21 is located between a designated position P and the winding axis O of the winding needle 13, and is a roller that provides tension to the positive electrode 11. Similarly, for the negative electrode 12, a corresponding fixed roller 21 can also be set at a position before the electrode enters the winding needle 13.
  • the first length L1 refers to the length of the straight line segment from the designated position P of the electrode sheet to the cutting point of the fixed roller 21.
  • the second length L2 is the length of the straight line segment from the cutting point of the fixed roller 21 to the cutting point on the surface of the core.
  • the third length L3 is the length of the arc-shaped end of the electrode sheet wound on the surface of the fixed roller 21 between the cutting point and the cutting point.
  • the length L of the unwound electrode sheet can be calculated in real time. This allows for the determination of the precise position of a specific part of the electrode sheet wound onto the core based on the length L of the unwound electrode sheet, thereby improving the accuracy of the electrode assembly's dimensional detection.
  • Figure 5 is a schematic diagram of the flattened electrode assembly in some embodiments of this application.
  • the electrode assembly is a wound electrode assembly obtained by winding the core and flattening it according to a preset flattening coefficient.
  • step 130 includes: determining first size information of the electrode assembly based on position information and a preset flattening coefficient, the first size information including at least one of the width B of the electrode assembly and the thickness T of the electrode assembly.
  • pressure is applied along the second direction Y to flatten the electrode assembly into a racetrack-shaped electrode assembly.
  • the width of the electrode assembly along the first direction X is B
  • the thickness along the second direction Y is T.
  • the initial winding diameter R_0 and the maximum winding diameter R_max of the electrode assembly can be calculated based on the position information.
  • the initial winding diameter R_0 may be the real-time winding radius corresponding to the first turn of the electrode
  • the maximum winding diameter R_max may be the real-time winding radius corresponding to the last turn of the electrode.
  • T 2(R_max - R_0) ⁇ K; where K is the preset flattening coefficient.
  • the true initial winding diameter and maximum winding diameter can be obtained, thereby accurately calculating the external dimensions of the electrode assembly and improving the accuracy of size detection.
  • a specific portion is located on the tab of the electrode sheet, and the second dimension information includes one or more of the following: tab width, tab misalignment, tab edge distance, and positive and negative tab spacing in the electrode assembly.
  • the position information of the first edge and the second edge of the tab relative to each other along the conveying direction or the winding direction can be calculated using the position information of the feature part, and the second dimension information related to the tab can be calculated based on this.
  • the specific location can be on the first edge Q1 of the positive electrode tab 111 or on the second edge Q2 of the positive electrode tab 111.
  • the tab width is the distance S11 between the opposite first edge Q1 and second edge Q2.
  • the tab misalignment is the calculated misalignment between the tab position and the design position. It can be represented by the difference between the distance S12 between the first edge Q1 of the tab and the mid-longitudinal section CL of the electrode assembly and the design value, or the difference between the distance S13 between the second edge Q2 of the tab and the mid-longitudinal section CL of the electrode assembly and the design value.
  • the tab edge distance can be represented by the distance S15 between the first edge Q1 along the first direction X and the outer end point of the electrode assembly, and the distance S14 between the second edge Q1 along the first direction X and the outer end point of the electrode assembly.
  • a specific portion may be located simultaneously on both the positive electrode tab 111 and the negative electrode tab 121. This allows for the calculation of not only the second dimension information corresponding to the positive electrode tab 111 but also the second dimension information corresponding to the negative electrode tab 121.
  • the distance S23 between the first edge of the negative electrode tab 121 and the mid-longitudinal section CL of the electrode assembly along the first direction X, and the distance S21 between the second edge of the negative electrode tab 121 and the mid-longitudinal section CL of the electrode assembly along the first direction X can be used to calculate the tab width S21, the tab misalignment, the tab edge distance, and the distance between the positive and negative electrodes.
  • the distance between the positive and negative electrodes is the interval between adjacent positive electrodes 111 and negative electrodes 121 along the first direction X, which can be represented by S12 + S22.
  • the second dimension information corresponding to the tabs can be determined more accurately. This helps to promptly assess whether the position or size of the tabs is abnormal during the winding process and whether it can meet the production design requirements, thereby ensuring the battery production yield.
  • step S130 further includes: determining the maximum tab misalignment of the electrode assembly based on the size information; wherein, the maximum tab misalignment is the maximum misalignment distance between tabs of different numbers of electrode turns in the electrode assembly along the width direction of the electrode assembly.
  • the maximum electrode tab misalignment refers to electrodes of the same polarity. Because electrode assemblies may be affected by various factors during the winding process, such as manufacturing errors, transmission accuracy errors, and electrode size fluctuations, the misalignment can vary depending on the number of turns of the electrode. The location of the tab may deviate from the design location, resulting in misalignment between tabs with different numbers of electrode turns. The maximum tab misalignment is used to measure the maximum misalignment distance of such tabs along the width direction of the electrode assembly.
  • the maximum misalignment distance can be represented by the maximum value of the difference between the distance S11 from the first edge of the tab in the electrode assembly to the mid-longitudinal section CL of the electrode assembly and the reference center distance.
  • Figure 6 is a structural block diagram of an electrode assembly size detection device provided in some embodiments of this application.
  • Some embodiments of this application provide a size detection device 200 for an electrode assembly, which includes a parameter acquisition unit 210, a position determination unit 220, and a size determination unit 230.
  • the parameter acquisition unit 210 is configured to acquire winding parameters during electrode winding; the winding parameters include the real-time winding radius of the core when a specific part of the electrode reaches a designated position, and the length of the unwound electrode between the core and the designated position; the position determination unit 220 is configured to determine the position information of the specific part wound onto the surface of the core based on the winding parameters; the position information includes the distance between the specific part and the winding axis of the core, and the angle between the line connecting the specific part and the winding axis and the reference plane; the reference plane is a preset plane passing through the winding axis; the size determination unit 230 is configured to determine the size information of the electrode assembly obtained after the core winding is completed based on the position information, the size information includes first size information corresponding to the shape of the electrode assembly, and/or second size information corresponding to the position of the specific part.
  • the electrode assembly size detection device 200 can be a computer device or an automated system for performing the size detection method 100 in the above embodiments, and it has the same effect as the size detection method 100 described above, which will not be repeated here.
  • the parameter acquisition unit 210 includes a first detection unit and a second detection unit.
  • the first detection unit is used to detect the unwinding length of the electrode sheet within a preset time period; the second detection unit is used to detect the rotation angle of the core within the preset time period.
  • the first detection unit can be any length detection sensor, such as a length measuring sensor or encoder, which can detect the unwinding length by recording the length value using the encoder.
  • the second detection unit can be any angle sensor, such as an angle encoder, used to detect the rotation angle of the take-up roller where the core is located.
  • the real-time winding radius of the core can be detected and calculated more accurately, thereby improving the size recognition accuracy of the electrode assembly.
  • the parameter acquisition unit 210 further includes a third detection unit 401, which is arranged at a designated position P to detect whether a specific part Q has reached the designated position P.
  • the third detection unit 401 can be any type of sensor, as long as it can detect whether the target object has reached the specified position.
  • the specific part is located on the tab, and the third detection unit 401 is a tab sensor.
  • the third detection unit 401 can be a proximity switch, a capacitive sensor, an ultrasonic sensor, an infrared sensor, or a vision sensor, etc.
  • the position of specific parts can be detected more accurately, improving the accuracy of dimensional detection calculation data, thereby improving the dimensional recognition accuracy of electrode components.
  • Figure 7 is a schematic diagram of battery production equipment provided in some embodiments of this application.
  • a battery production apparatus 1000 including a winding assembly 400, a size detection device 200, and an electrode unwinding assembly 300.
  • the winding assembly 400 includes a winding needle 13 that rotates about a winding axis
  • the electrode unwinding assembly 300 includes an unwinding roller for unwinding the electrode sheet. After the electrode sheet is unwound, it is wound onto the winding needle 13 to form a core.
  • the size detection device 200 is used to calculate the size information of the electrode assembly obtained after the core winding is completed.
  • the electrode unwinding assembly 300 includes a positive electrode unwinding roller 301, a negative electrode unwinding roller 302, a positive electrode stationary roller 303, and a negative electrode stationary roller 303.
  • the positive electrode unwinding roller 301 and the negative electrode unwinding roller 302 are equipped with a first detection unit for detecting the unwinding length, the winding assembly 400 is equipped with a second detection unit for detecting the rotation angle of the winding core, and a third detection unit 401 is also provided at a designated position to detect whether a specific part has been reached.
  • the third detection unit 401 can be an electrode tab sensor.
  • the battery production equipment 1000 includes a size detection device 200, which can monitor the size changes of the electrode assembly in a timely manner during the electrode winding process, and can be used for electrode assemblies of different specifications, making it highly versatile.
  • This application provides a computing device, which includes: at least one processor; and at least one memory communicatively connected to the at least one processor, wherein the at least one memory stores instructions that, when executed individually or jointly by the at least one processor, cause the computing device to perform the size detection method 100 described in the above embodiments.
  • Various embodiments of the systems and technologies described above in this application can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof.
  • FPGAs field-programmable gate arrays
  • ASICs application-specific integrated circuits
  • ASSPs application-specific standard products
  • SoCs systems-on-a-chip
  • CPLDs payload-programmable logic devices
  • These various embodiments may include: implementations in one or more computer programs that can be executed and/or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.
  • a programmable processor which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.
  • This application provides a computer-readable storage medium storing instructions that, when executed individually or jointly by one or more processors of a computing device, cause the computing device to perform the size detection method 100 described in the above embodiments.
  • Computer-readable media can be tangible media that may contain or store programs for use by or in conjunction with an instruction execution system, apparatus, or device.
  • Machine-readable media can be machine-readable signal media or machine-readable storage media.
  • Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.
  • This application provides a computer program product including instructions that, when executed individually or jointly by one or more processors of a computing device, cause the computing device to perform the size detection method 100 described in the above embodiments.
  • the battery production equipment 1000 includes a size detection device 200, an electrode unwinding assembly 300, and a winding assembly 400.
  • the electrode unwinding assembly 300 includes a positive electrode unwinding roller 301, a negative electrode unwinding roller 302, a positive electrode stationary roller 303, and a negative electrode stationary roller 304 arranged at intervals.
  • the winding assembly 400 includes a winding needle 13 that rotates around a winding axis. After the positive electrode 11 is unwound, it passes through the positive electrode stationary roller 303 to the winding needle 13. After the negative electrode 12 is unwound, it passes through the negative electrode stationary roller 304 to the winding needle 13. The negative electrode 12, together with the positive electrode 11 and the separator, is wound into a core.
  • the size detection device 200 includes a parameter acquisition unit 210, a position determination unit 220, and a size determination unit 230.
  • the parameter acquisition unit 210 is used to acquire the winding parameters during electrode winding.
  • the winding parameters include the real-time winding radius R of the core when a specific part of the electrode reaches a designated position, and the length L of the unwound electrode between the core and the designated position; wherein the specific part is located on the positive electrode tab 111.
  • the calculation steps for the length L of the unwound electrode sheet are as follows: obtain the positioning information of the specified position P relative to the winding axis O of the core; the positioning information includes the position information of the specified position P, the position information of the axis of the fixed roller 21, and the position information of the winding axis O.
  • the position determination unit 220 is configured to determine the position information of a specific part P wound onto the surface of the core based on the winding parameters.
  • the position information includes the distance between the specific part P and the winding axis O of the core, i.e., the corresponding real-time winding radius R, and the angle ⁇ between the line connecting the specific part P and the winding axis O and the reference plane M.
  • the reference plane M can be a plane determined by the winding axis O and the position of the needle-pulling hole 131 on the surface of the needle 13.
  • the size determination unit 230 is configured to determine the size information of the electrode assembly obtained after the core winding is completed based on the position information.
  • the size information includes first size information corresponding to the shape of the electrode assembly and second size information corresponding to the tab at a specific location P.
  • the electrode assembly is a wound electrode assembly obtained by winding a core and flattening it according to a preset flattening coefficient.
  • the first dimensional information includes at least one of the width B and thickness T of the flattened electrode assembly.
  • the second dimensional information includes one or more of the following: tab width, tab misalignment, tab edge distance, and positive and negative tab spacing.

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Abstract

本申请提供一种尺寸检测方法及装置、生产设备、计算设备、介质及产品，属于电池技术领域。电极组件的尺寸检测方法包括：获取极片卷绕时的卷绕参数；卷绕参数包括极片的特定部位到达指定位置时卷针上的卷芯的实时卷绕半径，以及卷芯和指定位置之间未卷绕的极片长度；根据卷绕参数确定特定部位卷绕至卷芯表面的位置信息；位置信息包括特定部位与卷芯的卷绕轴线之间的距离，以及特定部位与卷芯的卷绕轴线的连线与基准平面之间的夹角；基准平面为穿过卷绕轴线的预设平面；根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息。本申请可以准确检测电极组件的尺寸，及时发现卷绕过程中的缺陷，检测精度不受其他因素影响，通用性强。

Description

尺寸检测方法及装置、生产设备、计算设备、介质及产品
交叉引用
本申请引用于2024年5月15日递交的名称为“尺寸检测方法及装置、生产设备、计算设备、介质及产品”的第2024106009338号中国专利申请，其通过引用被全部并入本申请
技术领域
本申请涉及电池技术领域，尤其涉及尺寸检测方法及装置、生产设备、计算设备、介质及产品。
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，电池技术又是关乎其发展的一项重要因素。
电池的电极组件在制造过程中，需要及时检测卷绕过程中电极组件的尺寸，以确保电极组件满足工艺生产要求。然而目前并没有准确可靠的尺寸检测方法，亟需改进。
发明内容
本申请旨在至少解决背景技术中存在的技术问题之一。为此，本申请的一个目的在于提供一种尺寸检测方法及装置、生产设备、计算设备、介质及产品，以解决电极组件的尺寸检测的问题。
本申请第一方面的实施例提供一种电极组件的尺寸检测方法，其包括：获取极片卷绕时的卷绕参数；卷绕参数包括极片的特定部位到达指定位置时卷针上的卷芯的实时卷绕半径，以及卷芯和指定位置之间未卷绕的极片长度；根据卷绕参数确定特定部位卷绕至卷芯表面的位置信息；位置信息包括特定部位与卷芯的卷绕轴线之间的距离，以及特定部位与卷芯的卷绕轴线的连线与基准平面之间的夹角；基准平面为穿过卷绕轴线的预设平面；根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息，尺寸信息包括与电极组件的外形对应的第一尺寸信息，和/或与特定部位所在位置对应的第二尺寸信息。
本申请实施例的技术方案中，通过获取极片的卷绕参数，就可以在卷绕过程中提前识别卷绕后的电极组件的尺寸信息，有利于及时发现卷绕过程中的缺陷，提高产品的良率，而且由于检测结果可以根据来料变化自动调整，这样可以适用多种不同规格，通用性强，无需再因为电极组件型号调整而重新调整，有助于提高生产效率。
在一些实施例中，获取极片卷绕时的卷绕参数包括：获取预设时间段极片的放卷长度；获取卷芯在预设时间段内的旋转角度；根据放卷长度和旋转角度确定实时卷绕半径。通过实时获取放卷长度和旋转角度，可以计算得到卷绕过程中卷针上的卷芯的实时卷绕半径，这样可以不受材料参数变化和电极组件换型的影响，通用性强。
在一些实施例中，尺寸检测方法还包括：根据卷芯的实时卷绕半径和卷芯上卷绕的极片圈数，确定卷芯上与极片圈数对应的极片厚度。本实施例可以通过实时卷绕半径的变化计算对应的极片厚度变化，有利于及时发现极片厚度异常或者卷绕异常，从而提高电极组件卷绕的质量。
在一些实施例中，获取极片卷绕时的卷绕参数还包括：获取指定位置相对卷芯的卷绕轴线的定位信息；根据定位信息以及实时卷绕半径确定未卷绕的极片长度。这样有助于准确确定特定部位卷绕至卷芯表面的位置，从而提高尺寸计算结果的准确性。
在一些实施例中，指定位置与卷芯的卷绕轴线之间还设有与极片接触的定辊；定位信息包括指定位置的位置信息、定辊的轴心的位置信息、以及卷绕轴线的位置信息；并且其中，根据定位信息以及实时卷绕半径确定未卷绕的极片长度包括：根据定位信息确定指定位置距离定辊的轴心的第一距离、定辊轴心距离卷绕轴线的第二距离；根据第一距离、定辊的半径、第二距离以及实时卷绕半径确定未卷绕的极片长度，未卷绕的极片长度包括位于指定位置与定辊之间的第一长度、位于定辊和卷芯之间的第二长度，以及极片与定辊表面贴合的第三长度。这样可以进一步根据未卷绕的极片长度确定极片上的特定部位卷绕到卷芯上的准确位置，提高电极组件的尺寸检测的准确性。
在一些实施例中，电极组件为卷芯卷绕完成并按预设压扁系数压扁得到的卷绕电极组件，并且其中，根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息包括：根据位置信息和预设压扁系数确定电极组件的第一尺寸信息，第一尺寸信息包括电极组件的宽度和厚度中的至少一者。这样可以得到真实的初始卷径和最大卷径，从而准确计算得到电极组件的外形尺寸，提高尺寸检测的准确性。
在一些实施例中，特定部位位于极片的极耳上，第二尺寸信息包括电极组件中的极耳宽度、极耳错位量、极耳边距以及正负极耳间距中的一项或多项。根据特定部位与极 耳的几何尺寸关系，可以更准确的确定与极耳对应的第二尺寸信息，从而有利于及时评估卷绕过程中极耳的位置或尺寸是否出现异常，以及是否能够满足生产设计要求，从而保障电池生产良率。
在一些实施例中，根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息还包括：根据尺寸信息确定电极组件的最大极耳错位量；其中，最大极耳错位量是电极组件中不同极片圈数的极耳之间沿电极组件的宽度方向的最大错位距离。通过与极耳对应的第二尺寸信息计算最大错位距离，可以更直观的评估极耳在卷绕过程中的误差水平，从而准确评估电极组件的卷绕质量，提高电极组件的生产良率。
本申请第二方面的实施例提供一种电极组件的尺寸检测装置，其包括：参数获取单元，被配置用于获取极片卷绕时的卷绕参数；卷绕参数包括极片的特定部位到达指定位置时卷芯的实时卷绕半径，以及卷芯和指定位置之间未卷绕的极片长度；位置确定单元，被配置用于根据卷绕参数确定特定部位卷绕至卷芯表面的位置信息；位置信息包括特定部位与卷芯的卷绕轴线之间的距离，以及特定部位与卷芯的卷绕轴线的连线与基准平面之间的夹角；基准平面为穿过卷绕轴线的预设平面；以及尺寸确定单元，被配置用于根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息，尺寸信息包括与电极组件的外形对应的第一尺寸信息，和/或与特定部位所在位置对应的第二尺寸信息。
在一些实施例中，参数获取单元包括第一检测单元和第二检测单元，第一检测单元用于检测预设时间段极片的放卷长度；第二检测单元用于检测卷芯在预设时间段内的旋转角度。通过设置传感器可以更准确的检测和计算卷芯的实时卷绕半径，从而提高电极组件的尺寸识别精度。
在一些实施例中，参数获取单元还包括第三检测单元，第三检测单元布置在指定位置，以用于检测特定部位是否达到指定位置。通过设置传感器可以更准确的检测特定部位的位置，提高尺寸检测计算数据的准确性，从而提高电极组件的尺寸识别精度。
本申请第三方面的实施例提供一种电池生产设备，其包括：卷绕组件，包括绕卷绕轴线转动的卷针，极片放卷组件，包括用于放卷极片的放卷辊，极片放卷后卷绕至卷针形成卷芯；以及如上所述的尺寸检测装置，尺寸检测装置用于计算卷芯卷绕完成得到的电极组件的尺寸信息。
本申请第四方面的实施例提供一种计算设备，其包括：至少一个处理器；以及与至少一个处理器通信连接的至少一个存储器，至少一个存储器存储有指令，该指令当被至 少一个处理器单独或共同执行时，使计算设备执行以上实施例描述的训练方法或电池故障预测方法。
本申请第五方面的实施例提供一种计算机可读存储介质，存储有指令，该指令当被计算设备的一个或多个处理器单独或共同执行时，使计算设备执行以上实施例描述的训练方法或电池故障预测方法。
本申请第六方面的实施例提供一种计算机程序产品，包括指令，该指令当被计算设备的一个或多个处理器单独或共同执行时，使计算设备执行以上实施例描述的训练方法或电池故障预测方法。
上述说明仅是本申请技术方案的概述，为了能够更清楚了解本申请的技术手段，而可依照说明书的内容予以实施，并且为了让本申请的上述和其它目的、特征和优点能够更明显易懂，以下特举本申请的具体实施方式。
附图说明
在附图中，除非另外规定，否则贯穿多个附图相同的附图标记表示相同或相似的部件或元素。这些附图不一定是按照比例绘制的。应该理解，这些附图仅描绘了根据本申请公开的一些实施方式，而不应将其视为是对本申请范围的限制。为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据附图获得其他的附图。
图1为本申请一些实施例提供的电极组件的尺寸检测方法的流程图；
图2为本申请一些实施例提供的电极组件卷绕过程中的尺寸检测的示意图；
图3为本申请一些实施例提供的特定部位卷绕到卷芯表面的示意图；
图4为本申请一些实施例提供的计算卷芯实时卷绕半径的示意图；
图5为本申请一些实施例中的压扁后的电极组件的示意图；
图6为本申请一些实施例提供的电极组件的尺寸检测装置的结构框图；
图7为本申请一些实施例提供的电极组件的生产设备的示意图。
附图标记说明：
电池生产设备1000；
尺寸检测方法100，尺寸检测装置200，极片放卷组件300，卷绕组件400；
正极片11，负极片12，卷针13，拔针孔131，定辊21，参数获取单元210，位置确定单元220，尺寸确定单元230，正极片放卷辊301，负极片放卷辊302，正极片定辊303、负极片定辊304，正极耳111，负极耳121，第三检测单元401；
卷绕轴线O，基准平面M，特定部位Q，指定位置P，中纵剖面CL，第一方向X，第二方向Y。
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，电池的应用越加广泛。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。
电池单体是组成电池的最小单元，电极组件是电池单体发生电化学反应的组件。电极组件是由正极片、负极片以及隔膜层叠卷绕形成的。在卷绕过程中，需要对电极组件的卷绕参数进行尺寸检测，或者说尺寸预测，提前预估电极组件的外形尺寸和极耳位置相关的尺寸，以确保当前制备工艺和控制参数生产的电极组件能够满足工艺生产要求。
相关技术中，对于电池组件的不同部分的尺寸需要分别建立不同的识别模型来进行检测，但是这样的识别模型受到的限制因素较多，例如电池单体的型号规格变化、卷绕设备的参数变化或者是来料参数发生变化，都会导致识别模型检测结果失真，而重新调整或更换又费时费力，影响电极组件的生产效率。
为了解决上述问题，本申请提出一种电极组件的尺寸检测方法，其包括：获取极片卷绕时的卷绕参数；卷绕参数包括极片的特定部位到达指定位置时卷针上的卷芯的实时卷绕半径，以及卷芯和指定位置之间未卷绕的极片长度；根据卷绕参数确定特定部位卷绕至卷芯表面的位置信息；位置信息包括特定部位与卷芯的卷绕轴线之间的距离，以及特定部位与卷芯的卷绕轴线的连线与基准平面之间的夹角；基准平面根据卷绕轴线的延伸方向以及拔针孔的延伸方向确定；根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息。本申请的尺寸检测方法可以实时检测电极组件的尺寸，及时发现卷绕过程中的缺陷，检测精度不受其他因素影响，通用性强。
本申请实施例公开的电池单体可以但不限用于车辆、船舶或飞行器等用电装置中。可以使用具备本申请公开的电池单体、电池等组成该用电装置的电源系统。
电池包括箱体和电池单体，电池单体容纳于箱体内。在电池中，电池单体可以是多个，多个电池单体之间可串联或并联或混联，混联是指多个电池单体中既有串联又有并联。多个电池单体之间可直接串联或并联或混联在一起，再将多个电池单体构成的整体容纳于箱体内；当然，电池也可以是多个电池单体先串联或并联或混联组成电池模块形式，多个电池模块再串联或并联或混联形成一个整体，并容纳于箱体内。
其中，每个电池单体可以为二次电池或一次电池；还可以是锂硫电池、钠离子电池或镁离子电池，但不局限于此。电池单体可呈圆柱体、扁平体、长方体或其它形状等。
电极组件是电池单体中发生电化学反应的部件。壳体内可以包含一个或更多个电极组件。电极组件主要由正极片和负极片卷绕或层叠放置形成，并且通常在正极片与负极片之间设有隔膜。正极片和负极片具有活性物质的部分构成电极组件的主体部，正极片和负极片不具有活性物质的部分各自构成极耳。正极极耳和负极极耳可以共同位于主体部的一端或是分别位于主体部的两端。在电池的充放电过程中，正极活性物质和负极活性物质与电解液发生反应，极耳连接电极端子以形成电流回路。
请参照图1-图3，图1为本申请一些实施例提供的电极组件的尺寸检测方法的流程图，图2为本申请一些实施例提供的电极组件卷绕过程中的尺寸检测的示意图，图3为本申请一些实施例提供的特定部位卷绕到卷芯表面的示意图。
本申请实施例提供了一种电极组件的尺寸检测方法100，其包括：
步骤S110：获取极片卷绕时的卷绕参数；卷绕参数包括极片的特定部位到达指定位置时卷针上的卷芯的实时卷绕半径，以及卷芯和指定位置之间未卷绕的极片长度；
步骤S120：根据卷绕参数确定特定部位卷绕至卷芯表面的位置信息；位置信息包括特定部位与卷芯的卷绕轴线之间的距离，以及特定部位与卷芯的卷绕轴线的连线与基准平面之间的夹角；基准平面为穿过卷绕轴线的预设平面；
步骤S130：根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息，尺寸信息包括与电极组件的外形对应的第一尺寸信息，和/或与特定部位所在位置对应的第二尺寸信息。
这里的极片可以是正极片，也可以是负极片。极片从放卷辊出来并被传送到卷针的表面进行卷绕。极片的特定部位可以是任意指定的某个位置，具体可以根据检测对象来确定。指定位置位于极片的放卷辊和卷针之间，并设置在极片的特定部位在传送过程中的移动路径上。
如图2所示，正极片11和负极片12分别卷绕至卷针13的表面形成卷芯，在卷绕过程中，卷芯的直径是逐渐增大的，卷芯卷绕完成后得到电极组件。下面以正极片11作为对象进行说明，正极片11在传送过程中会经过指定位置P，正极片11的特定部位Q可以是某个极耳上的特定区域或特定位置，当正极片11的特定部位到达指定位置P时，获取卷针13上的卷芯的实时卷绕半径R以及卷芯和指定位置P之间未卷绕的极片长度L，这里的极片长度L指的是从指定位置P到卷芯的卷绕切点之间极片的长度。
步骤S120中的位置信息指的是特定部位Q卷绕至卷芯后在卷芯上的位置信息。如图3所示，根据卷芯的实时卷绕半径R以及未卷绕的极片长度L，可以计算得到特定部位Q卷绕至卷芯表面的具体位置，位置信息则是与该具体位置相关的信息，例如包括半径位置信息和角度位置信息，半径位置信息可以用该指定部位距离卷芯的卷绕轴线O的距离来表示，也就是特定部位Q卷绕到卷芯上时对应的实时卷绕半径R，所在角度位置信息可以用特定部位Q与卷绕轴线O的连线与基准平面M之间的夹角α来表示。
基准平面M是提前选取的任意一个穿过卷绕轴线O的预设平面，在一些实施例中，基准平面M可以是由卷绕轴线O以及卷针13表面的拔针孔131的位置确定的平面。
步骤S130中，根据上述位置信息，可以进一步基于该特定部位Q与电极组件中其他部件或位置的关系，得到卷绕完成后的电极组件的尺寸信息。电极组件的外形可以是圆柱形，也可以是将圆柱形压扁形成的跑道形。第一尺寸信息可以是圆柱形电极组件的半径或直径，也可以是压扁后的跑道形电极组件的宽度、厚度等。第二尺寸信息可以是特定部位在卷绕完成后的电极组件中相关的尺寸信息，可以根据特定部位的位置信息来计算得到的尺寸信息。例如特定部位距离电极组件某个特定基准位置的距离，特定基准位置可以是电极组件的中剖面；又例如，特定部位的数量为多个，第二尺寸信息可以是多个特定部位分别距离某个基准面的距离，或是多个特定部位之间的相对距离等等。
通过获取极片的卷绕参数，就可以在卷绕过程中提前识别卷绕后的电极组件的尺寸信息，有利于及时发现卷绕过程中的缺陷，提高产品的良率，而且由于检测结果可以根据来料变化自动调整，这样可以适用多种不同规格，通用性强，无需再因为电极组件型号调整而重新调整，有助于提高生产效率。
请参阅图4，图4为本申请一些实施例提供的计算卷芯实时卷绕半径的示意图。
根据本申请的一些实施例，步骤S110包括：获取预设时间段极片的放卷长度ΔL；获取卷芯在预设时间段内的旋转角度Δθ；根据放卷长度和旋转角度确定实时卷绕半径R。
预设时间段可以是人为提前设置的时间间隔。放卷长度ΔL可以用编码器记长值来检测，具体可以通过长度编码器检测预设时间段极片放出的长度。卷芯的旋转角度Δθ可以采用角度编码器来检测，具体可以通过检测卷绕辊在预设时间段的旋转角度来确定。
在一些实施例中，实时卷绕半径R可以通过以下公式计算得到：R＝180ΔL/Δθπ。
通过实时获取放卷长度和旋转角度，可以计算得到卷绕过程中卷针13上的卷芯的实时卷绕半径，这样可以不受材料参数变化和电极组件换型的影响，通用性强。
根据本申请的一些实施例，尺寸检测方法100还包括：根据卷芯的实时卷绕半径R和卷芯上卷绕的极片圈数，确定卷芯上与极片圈数对应的极片厚度。
由于极片厚度会影响到卷芯的实时卷绕半径，而根据计算得到的实时卷绕半径，可以用来反推对应的极片厚度。在一些实施例中，可以根据不同圈数下对应的实时卷绕半径来计算得到每一圈的极片的厚度。
本实施例可以通过实时卷绕半径R的变化计算对应的极片厚度变化，有利于及时发现极片厚度异常或者卷绕异常，从而提高电极组件卷绕的质量。
根据本申请的一些实施例，步骤S110包括：获取指定位置P相对卷芯的卷绕轴线O的定位信息；根据定位信息以及实时卷绕半径R确定未卷绕的极片长度L。
定位信息包括指定位置P和卷绕轴线O的位置信息。在一些实施例中，可以建立空间坐标系，并分别确定指定位置P和卷绕轴线O的位置坐标。未卷绕的极片长度L是极片位于指定位置P的一端与位于卷芯上的切点的另一端之间的长度。
由于卷芯上的切点的位置会随着卷芯的实时卷绕半径R的变化而变化，而未卷绕的极片长度L的一点点误差度可能会对特定部位最终在卷芯表面上的位置产生较大的影响。考虑到极片在传送过程中通常是会处于张紧状态，因此，需要结合上述定位信息以及实时卷绕半径R一起来确定未卷绕的极片长度L。
本实施例可以根据实时卷绕半径R实时计算并更新未卷绕的极片长度L，这样有助于准确确定特定部位卷绕至卷芯表面的位置，从而提高尺寸计算结果的准确性。
根据本申请的一些实施例，指定位置P与卷芯的卷绕轴线O之间还设有与极片接触的定辊21；定位信息包括指定位置P的位置信息、定辊21的轴心的位置信息、以及卷绕轴线O的位置信息。
在一些实施例中，根据定位信息以及实时卷绕半径R确定未卷绕的极片长度L包括：
根据定位信息确定指定位置P距离定辊21的轴心的第一距离D1、定辊21的轴心距离卷绕轴线O的第二距离D2；
根据第一距离D1、定辊21的半径R2、第二距离D2以及实时卷绕半径R1确定未卷绕的极片长度L，未卷绕的极片长度L包括位于指定位置P与定辊21之间的第一长度L1、位于定辊21和卷芯之间的第二长度L2，以及极片与定辊21表面贴合的第三长度L3。
如图2所示，定辊21位于指定位置P与卷针13的卷绕轴线O之间、对正极片11起到张紧作用的辊。类似的，对于负极片12，也可以在极片进入卷针13前的位置设置对应的定辊21。
第一长度L1是指极片自指定位置P至定辊21的切入点之间的直线段的长度，第二长度L2是自定辊21的切出点至卷芯表面的切入点之间的直线段的长度，第三长度L3是极片缠绕在定辊21表面、位于切入点和切出点之间的一端圆弧形的长度。
由于极片在定辊21的切出点与卷芯的切入点的位置会随着卷芯的实时卷绕半径的变化而实时同步变化，可以根据指定位置P、定辊21以及卷芯之间的几何尺寸和位置关系，分别计算第一长度L1、第二长度L2以及第三长度L3，并且未卷绕的极片长度L为：L＝L1+L2+L3。
根据指定位置P、定辊21以及卷芯之间的几何尺寸和位置关系可以实时计算未卷绕的极片长度L，从而可以进一步根据未卷绕的极片长度L确定极片上的特定部位卷绕到卷芯上的准确位置，提高电极组件的尺寸检测的准确性。
请参阅图5，图5为本申请一些实施例中的压扁后的电极组件的示意图。
根据本申请的一些实施例，电极组件为卷芯卷绕完成并按预设压扁系数压扁得到的卷绕电极组件。
在一些实施例中，步骤130包括：根据位置信息和预设压扁系数确定电极组件的第一尺寸信息，第一尺寸信息包括电极组件的宽度B和电极组件的厚度T中的至少一者。
如图5所示，沿第二方向Y施加压力将电极组件压扁得到跑道状的电极组件，此时电极组件的沿第一方向X的宽度为B，沿第二方向Y的厚度为T。
在一些实施例中，根据位置信息可以计算电极组件的初始卷径R_0，以及卷绕完成后的最大卷径R_max，其中，初始卷径R_0可以是第一圈极片对应的实时卷绕半径，最大卷径R_max可以是最后一圈极片对应的实时卷绕半径。
电极组件的宽度的计算公式为：B＝πR_0+2(R_max-R_0)。
电极组件的厚度的计算公式为：T＝2(R_max-R_0)×K；其中K为预设压扁系数。
通过尺寸检测方法100中实时卷绕半径的计算方法，可以得到真实的初始卷径和最大卷径，从而准确计算得到电极组件的外形尺寸，提高尺寸检测的准确性。
根据本申请的一些实施例，特定部位位于极片的极耳上，第二尺寸信息包括电极组件中的极耳宽度、极耳错位量、极耳边距以及正负极耳间距中的一项或多项。
如图5所示，根据特定部位在极耳上的位置，结合极耳自身的几何尺寸关系，可以通过特征部位的位置信息计算得到极耳沿传送方向或卷绕方向相对的第一边缘的位置信息和第二边缘的位置信息，并基于此计算得到极耳相关的第二尺寸信息。
如图5所示，特定部位可以是在正极耳111的第一边缘Q1上，也可以是在正极耳111的第二边缘Q2上，极耳宽度为相对的第一边缘Q1和第二边缘Q2之间的距离S11，极耳错位量则是计算得到的极耳位置与设计位置之间的错位量，可以用极耳第一边缘Q1距离电极组件的中纵剖面CL之间的距离S12与设计值的差值，或者第二边缘Q2距离电极组件的中纵剖面CL之间的距离S13与设计值的差值来表示，极耳边距可以包括第一边缘Q1沿第一方向X距离电极组件外侧端点的距离S15，以及第二边缘Q沿第一方向X距离电极组件外侧端点的距离S14来表示。
在一些实施例中，特定部位还可以同时位于正极耳111和负极耳121上，这样不仅可以计算正极耳111对应的第二尺寸信息，还可以同时计算与负极耳121对应的第二尺寸信息，例如负极耳121的第一边缘沿第一方向X距离电极组件的中纵剖面CL的距离S23、负极耳121的第二边缘沿第一方向X距离电极组件的中纵剖面CL的距离S21，并据此计算极耳宽度S21，极耳错位量、极耳边距，以及正负极耳间距。正负极耳间距为相邻的正极耳111与负极耳121沿第一方向X的间隔距离，可以用S12+S22来表示。
根据特定部位与极耳的几何尺寸关系，可以更准确的确定与极耳对应的第二尺寸信息，从而有利于及时评估卷绕过程中极耳的位置或尺寸是否出现异常，以及是否能够满足生产设计要求，从而保障电池生产良率。
根据本申请的一些实施例，步骤S130还包括：根据尺寸信息确定电极组件的最大极耳错位量；其中，最大极耳错位量是电极组件中不同极片圈数的极耳之间沿电极组件的宽度方向的最大错位距离。
最大极耳错位量是针对同极性的极耳而言的，由于电极组件在卷绕过程可能会收到多种因素的干扰，例如制造误差、传送精度误差、极片尺寸波动等，不同极片圈数上的 极耳所在位置可能与设计位置存在偏差，使得不同极片圈数的极耳之间存在错位，最大极耳错位量则是用于衡量这类极耳沿电极组件的宽度方向的最大错位距离。
在一些实施例中，如图5所示，可以采用电极组件中极耳的第一边缘距离电极组件的中纵剖面CL的距离S11与基准中心距的差值的最大值来表示最大错位距离，通过与极耳对应的第二尺寸信息计算最大错位距离，可以更直观的评估极耳在卷绕过程中的误差水平，从而准确评估电极组件的卷绕质量，提高电极组件的生产良率。
请参阅图6，图6为本申请一些实施例提供的电极组件的尺寸检测装置的结构框图。
本申请的一些实施例提供一种电极组件的尺寸检测装置200，其包括参数获取单元210、位置确定单元220和尺寸确定单元230。
参数获取单元210被配置用于获取极片卷绕时的卷绕参数；卷绕参数包括极片的特定部位到达指定位置时卷芯的实时卷绕半径，以及卷芯和指定位置之间未卷绕的极片长度；位置确定单元220被配置用于根据卷绕参数确定特定部位卷绕至卷芯表面的位置信息；位置信息包括特定部位与卷芯的卷绕轴线之间的距离，以及特定部位与卷绕轴线的连线和基准平面之间的夹角；基准平面为穿过卷绕轴线的预设平面；尺寸确定单元230被配置用于根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息，尺寸信息包括与电极组件的外形对应的第一尺寸信息，和/或与特定部位所在位置对应的第二尺寸信息。
电极组件的尺寸检测装置200可以是用于执行上述实施例中的尺寸检测方法100的计算机设备或自动化系统，其具有与上述尺寸检测方法100相同的效果，这里不再赘述。
根据本申请的一些实施例，参数获取单元210包括第一检测单元和第二检测单元，第一检测单元用于检测预设时间段极片的放卷长度；第二检测单元用于检测所述卷芯在预设时间段内的旋转角度。
第一检测单元可以是任意的长度检测传感器，例如测长传感器或编码器，可以通过编码器记长值来检测放卷长短。第二检测单元可以是任意的角度传感器，例如角度编码器，用于检测卷芯所在的收卷辊的旋转角度。
通过设置传感器可以更准确的检测和计算卷芯的实时卷绕半径，从而提高电极组件的尺寸识别精度。
根据本申请的一些实施例，参数获取单元210还包括第三检测单元401，第三检测单元401布置在指定位置P，以用于检测特定部位Q是否达到指定位置P。
第三检测单元401可以是任意的传感器类型，只要能够满足检测到目标对象是否达到指定位置即可。在一些实施例中，特定部位位于极耳上，第三检测单元401为极耳感应器，在一些实施例中，第三检测单元401可以是接近开关、电容式传感器、超声波传感器、红外传感器或者视觉传感器等。
通过设置传感器可以更准确的检测特定部位的位置，提高尺寸检测计算数据的准确性，从而提高电极组件的尺寸识别精度。
请参阅图7，图7为本申请一些实施例提供的电池生产设备的示意图。
本申请一些实施例提供一种电池生产设备1000，包括卷绕组件400、尺寸检测装置200以及极片放卷组件300。卷绕组件400包括绕卷绕轴线转动的卷针13，极片放卷组件300包括用于放卷极片的放卷辊，极片放卷后卷绕至卷针13形成卷芯；尺寸检测装置200用于计算卷芯卷绕完成得到的电极组件的尺寸信息。
在一些实施例中，如图7所示，极片放卷组件300包括正极片放卷辊301、负极片放卷辊302、正极片定辊303、负极片定辊303。
正极片放卷辊301、负极片放卷辊302处设有检测放卷长度的第一检测单元，卷绕组件400处设有检测卷芯旋转角度的第二检测单元，指定位置处还设有检测特定部位是否达到的第三检测单元401。第三检测单元401可以是极耳传感器。
电池生产设备1000包含尺寸检测装置200，因而可以在极片卷绕过程中及时监控电极组件的尺寸变化，而且可以适用不同规格的电极组件，通用性强。
本申请实施例提供了一种计算设备，其包括：至少一个处理器；以及与至少一个处理器通信连接的至少一个存储器，至少一个存储器存储有指令，该指令当被至少一个处理器单独或共同执行时，使计算设备执行以上实施例描述的尺寸检测方法100。
本申请中以上描述的系统和技术的各种实施方式可以在数字电子电路系统、集成电路系统、现场可编程门阵列(FPGA)、专用集成电路(ASIC)、专用标准产品(ASSP)、芯片上系统的系统(SOC)、负载可编程逻辑设备(CPLD)、计算机硬件、固件、软件、和/或它们的组合中实现。这些各种实施方式可以包括：实施在一个或者多个计算机程序中，该一个或者多个计算机程序可在包括至少一个可编程处理器的可编程系统上执行和/或解释，该可编程处理器可以是专用或者通用可编程处理器，可以从存储系统、至少一个输入装置、和至少一个输出装置接收数据和指令，并且将数据和指令传输至该存储系统、该至少一个输入装置和该至少一个输出装置。
本申请实施例提供了一种计算机可读存储介质，存储有指令，该指令当被计算设备的一个或多个处理器单独或共同执行时，使计算设备执行以上实施例描述的尺寸检测方法100。
计算机可读介质可以是有形的介质，其可以包含或存储以供指令执行系统、装置或设备使用或与指令执行系统、装置或设备结合地使用的程序。机器可读介质可以是机器可读信号介质或机器可读储存介质。机器可读介质可以包括但不限于电子的、磁性的、光学的、电磁的、红外的、或半导体系统、装置或设备，或者上述内容的任何合适组合。机器可读存储介质的更具体示例会包括基于一个或多个线的电气连接、便携式计算机盘、硬盘、随机存取存储器(RAM)、只读存储器(ROM)、可擦除可编程只读存储器(EPROM或快闪存储器)、光纤、便捷式紧凑盘只读存储器(CD-ROM)、光学储存设备、磁储存设备、或上述内容的任何合适组合。
本申请实施例提供了一种计算机程序产品，包括指令，该指令当被计算设备的一个或多个处理器单独或共同执行时，使计算设备执行以上实施例描述的尺寸检测方法100。
下面结合一个具体实施例对本申请的技术方案做进一步的说明。
如图1-图7所示，电池生产设备1000包括尺寸检测装置200、极片放卷组件300以及卷绕组件400。
极片放卷组件300包括间隔布置的正极片放卷辊301、负极片放卷辊302、正极片定辊303、负极片定辊304，卷绕组件400包括绕卷绕轴线转动的卷针13。正极片11放卷后经过正极片定辊303到卷针13、负极片12放卷后经过负极片定辊304到卷针13，负极片12与正极片11和隔膜一起卷绕成卷芯。
尺寸检测装置200包括参数获取单元210、位置确定单元220和尺寸确定单元230。
参数获取单元210用于获取极片卷绕时的卷绕参数。卷绕参数包括极片的特定部位到达指定位置时卷芯的实时卷绕半径R，以及卷芯和指定位置之间未卷绕的极片长度L；其中特定部位位于正极耳111上。
实时卷绕半径R的计算步骤为：获取预设时间段极片的放卷长度ΔL；获取卷芯在预设时间段内的旋转角度Δθ；根据放卷长度和旋转角度确定实时卷绕半径R，其中，R＝180ΔL/Δθπ。
未卷绕的极片长度L的计算步骤为：获取指定位置P相对卷芯的卷绕轴线O的定位信息；定位信息包括指定位置P的位置信息、定辊21的轴心的位置信息、以及卷绕轴线O的位置信息。
根据定位信息以及实时卷绕半径R确定未卷绕的极片长度L，具体包括：根据定位信息确定指定位置P距离定辊21的轴心的第一距离D1、定辊21的轴心距离卷绕轴线O的第二距离D2。根据第一距离D1、定辊21的半径R2、第二距离D2以及实时卷绕半径R1确定未卷绕的极片长度L，未卷绕的极片长度L包括位于指定位置P与定辊21之间的第一长度L1、位于定辊21和卷芯之间的第二长度L2，以及极片与定辊21表面贴合的第三长度L3。最后计算未卷绕的极片长度L为：L＝L1+L2+L3。
位置确定单元220被配置用于根据卷绕参数确定特定部位P卷绕至卷芯表面的位置信息；位置信息包括特定部位P与卷芯的卷绕轴线O之间的距离，即对应的实时卷绕半径R，以及特定部位P与卷绕轴线O的连线和基准平面M之间的夹角α。基准平面M可以是由卷绕轴线O以及卷针13表面的拔针孔131的位置确定的平面。
尺寸确定单元230被配置用于根据位置信息确定卷芯卷绕完成得到的电极组件的尺寸信息，尺寸信息包括与电极组件的外形对应的第一尺寸信息，以及与特定部位P所在极耳对应的第二尺寸信息。
电极组件为卷芯卷绕完成并按预设压扁系数压扁得到的卷绕电极组件。第一尺寸信息包括压扁后的电极组件的宽度B和厚度T中的至少一者。第二尺寸信息包括电极组件中的极耳宽度、极耳错位量、极耳边距以及正负极耳间距中的一项或多项。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围，其均应涵盖在本申请的权利要求和说明书的范围当中。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 (15)

  1. 一种电极组件的尺寸检测方法，包括：
    获取极片卷绕时的卷绕参数；所述卷绕参数包括所述极片上的特定部位到达指定位置时卷针上的卷芯的实时卷绕半径，以及所述卷芯和所述指定位置之间未卷绕的极片长度；
    根据所述卷绕参数确定所述特定部位卷绕至所述卷芯表面的位置信息；所述位置信息包括所述特定部位与所述卷芯的卷绕轴心之间的距离，以及所述特定部位与所述卷芯的卷绕轴线的连线与基准平面之间的夹角；所述基准平面为穿过所述卷绕轴线的预设平面；以及
    根据所述位置信息确定所述卷芯卷绕完成得到的电极组件的尺寸信息，所述尺寸信息包括与所述电极组件的外形对应的第一尺寸信息，和/或与所述特定部位所在位置对应的第二尺寸信息。
  2. 根据权利要求1所述的方法，其中，所述获取极片卷绕时的卷绕参数包括：
    获取预设时间段极片的放卷长度；
    获取所述卷芯在所述预设时间段内的旋转角度；
    根据所述放卷长度和所述旋转角度确定所述实时卷绕半径。
  3. 根据权利要求2所述的方法，其中，还包括：
    根据所述卷芯的实时卷绕半径和所述卷芯上卷绕的极片圈数，确定所述卷芯上与极片圈数对应的极片厚度。
  4. 根据权利要求1所述的方法，其中，所述获取极片卷绕时的卷绕参数还包括：
    获取所述指定位置相对所述卷芯的卷绕轴线的定位信息；
    根据所述定位信息以及所述实时卷绕半径确定所述未卷绕的极片长度。
  5. 根据权利要求4所述的方法，其中，所述指定位置与所述卷芯的卷绕轴线之间还设有与所述极片接触的定辊；所述定位信息包括所述指定位置的位置信息、所述定辊的轴心的位置信息、以及卷绕轴线的位置信息；并且其中，
    所述根据所述定位信息以及所述实时卷绕半径确定所述未卷绕的极片长度包括：
    根据所述定位信息确定所述指定位置距离所述定辊的轴心的第一距离、所述定辊轴心距离所述卷绕轴线的第二距离；
    根据所述第一距离、所述定辊的半径、所述第二距离以及所述实时卷绕半径确定所述未卷绕的极片长度，所述未卷绕的极片长度包括位于所述指定位置与所述定辊之间的 第一长度、位于所述定辊和所述卷芯之间的第二长度，以及所述极片与所述定辊表面贴合的第三长度。
  6. 根据权利要求1至5中任一项所述的方法，其中，所述电极组件为所述卷芯卷绕完成并按预设压扁系数压扁得到的卷绕电极组件，并且其中，
    所述根据所述位置信息确定所述卷芯卷绕完成得到的电极组件的尺寸信息包括：
    根据所述位置信息和所述预设压扁系数确定所述电极组件的第一尺寸信息，所述第一尺寸信息包括所述电极组件的宽度和所述电极组件的厚度中的至少一者。
  7. 根据权利要求1至5中任一项所述的方法，其中，所述特定部位位于所述极片的极耳上，所述第二尺寸信息包括所述电极组件中的极耳宽度、极耳错位量、极耳边距以及正负极耳间距中的一项或多项。
  8. 根据权利要求7所述的方法，其中，所述根据所述位置信息确定所述卷芯卷绕完成得到的电极组件的尺寸信息还包括：
    根据所述尺寸信息确定所述电极组件的最大极耳错位量；
    其中，所述最大极耳错位量是所述电极组件中不同极片圈数的极耳之间沿所述电极组件的宽度方向的最大错位距离。
  9. 一种电极组件的尺寸检测装置，包括：
    参数获取单元，被配置用于获取极片卷绕时的卷绕参数；所述卷绕参数包括所述极片的特定部位到达指定位置时卷芯的实时卷绕半径，以及所述卷芯和所述指定位置之间未卷绕的极片长度；
    位置确定单元，被配置用于根据所述卷绕参数确定所述特定部位卷绕至所述卷芯表面的位置信息；所述位置信息包括所述特定部位与所述卷芯的卷绕轴线之间的距离，以及所述特定部位与所述卷芯的卷绕轴线的连线与基准平面之间的夹角；所述基准平面为穿过所述卷绕轴线的预设平面；以及
    尺寸确定单元，被配置用于根据所述位置信息确定所述卷芯卷绕完成得到的电极组件的尺寸信息，所述尺寸信息包括与所述电极组件的外形对应的第一尺寸信息，和/或与所述特定部位所在位置对应的第二尺寸信息。
  10. 根据权利要求9所述的尺寸检测装置，其中，所述参数获取单元包括第一检测单元和第二检测单元，所述第一检测单元用于检测预设时间段极片的放卷长度；所述第二检测单元用于检测所述卷芯在所述预设时间段内的旋转角度。
  11. 根据权利要求9或10所述的尺寸检测装置，其中，所述参数获取单元还包括第三检测单元，所述第三检测单元布置在所述指定位置，以用于检测所述特定部位是否达到所述指定位置。
  12. 一种电池生产设备，包括：
    卷绕组件，包括绕卷绕轴线转动的卷针，
    极片放卷组件，包括用于放卷极片的放卷辊，所述极片放卷后卷绕至所述卷针形成卷芯；以及
    如权利要求9至11中任一项所述的尺寸检测装置，所述尺寸检测装置用于计算所述卷芯卷绕完成得到的电极组件的尺寸信息。
  13. 一种计算设备，包括：
    至少一个处理器；以及
    与所述至少一个处理器通信连接的至少一个存储器，所述至少一个存储器存储有指令，所述指令当被所述至少一个处理器单独或共同执行时，使所述计算设备执行权利要求1至8中任一项所述的方法。
  14. 一种计算机可读存储介质，存储有指令，所述指令当被计算设备的一个或多个处理器单独或共同执行时，使所述计算设备执行权利要求1至8中任一项所述的方法。
  15. 一种计算机程序产品，包括指令，所述指令当被计算设备的一个或多个处理器单独或共同执行时，使所述计算设备执行权利要求1至8中任一项所述的方法。
PCT/CN2024/113990 2024-05-15 2024-08-22 尺寸检测方法及装置、生产设备、计算设备、介质及产品 Pending WO2025236458A1 (zh)

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