A method for correcting misalignment of tabs

Abstract

The present invention discloses a method for correcting the misalignment of a lug, comprising: obtaining the winding information of a bare cell; extracting the lugs and the corresponding lug position information in the winding information of the bare cell; obtaining the corresponding lug number and the corresponding lug cumulative spacing according to the lugs and the corresponding lug position information in the winding information of the bare cell; obtaining the revised value of the corresponding lug cumulative spacing according to the lug number based on a preset correction equation; revising the lug cumulative spacing according to the revised value of the corresponding lug cumulative spacing, and performing misalignment calculation to obtain the corrected lug spacing. The method of the present invention is simple and easy to operate, and the calculation part can be completely handed over to a calculator, saving time and labor costs; in addition, the corrections of each lug spacing are independent of each other and do not interfere with each other, thereby improving the accuracy of the correction of the misalignment of the lugs.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and more specifically, to a method for correcting tab misalignment. Background Art

[0002] At present, most square battery cells are wound, and the alignment of the tabs is one of the main parameters to measure the winding effect. When the incoming material thickness, material properties and winding equipment are consistent, the alignment of the tabs mainly depends on the appropriate tab spacing. The current method for determining the tab spacing is to first test the paper, manually cut the tabs as marks, and then directly measure the spacing of each tab. There are the following problems: there are errors in manual measurement due to naked eye observation; the thickness of the blade during the cutting process affects the measurement error; manual measurement has high time and labor costs.

[0003] Therefore, the prior art has defects and needs to be improved urgently. Summary of the invention

[0004] In view of the above problems, an object of the present invention is to provide a method for correcting tab misalignment, which can more effectively save time and labor costs.

[0005] The present invention provides a method for correcting misalignment of a tab, comprising:

[0006] Get the bare cell winding information;

[0007] Extract the tabs and corresponding tab position information from the bare cell winding information;

[0008] According to the tabs in the bare cell winding information and the corresponding tab position information, the corresponding tab number and the corresponding tab cumulative spacing are obtained;

[0009] Based on the preset correction equation, according to the tab number, a revised value of the corresponding tab cumulative spacing is obtained;

[0010] The accumulated spacing of the tabs is revised according to the revised value of the accumulated spacing of the corresponding tabs, and the offset calculation is performed to obtain the corrected tab spacing.

[0011] In this solution, the steps of obtaining the corresponding tab cumulative spacing specifically include:

[0012] Get the distance d between two adjacent tabs i ;

[0013] The preset center position of the tab corresponding to the first number is recorded as point L;

[0014] Set the distance from the pole ear numbered i to point L to D i , whose formula is D i =∑ i n＝1 dn , where i∈n, and n represents the number of the tab.

[0015] In this solution, the step of obtaining the preset correction equation specifically includes:

[0016] Number the tabs in order from inside to outside to obtain the tab numbers;

[0017] Get the misalignment of any three tabs;

[0018] Based on a preset quadratic equation, the number of the tab is set as the x value, and the misalignment amount of the corresponding tab is set as the y value;

[0019] Input the numbers of any three tabs and the misalignment amounts of the corresponding tabs into the corresponding preset quadratic equation to obtain the corresponding preset revised equation.

[0020] In this solution, the step of revising the accumulated spacing of the tabs according to the revised value of the accumulated spacing of the corresponding tabs, and performing misalignment calculation to obtain the corrected tab spacing specifically includes:

[0021] The accumulated spacing of the tabs is revised according to the revised value of the accumulated spacing of the corresponding tabs, and the revised accumulated spacing of the tabs D is obtained. ′ i, whose formula is D i ′ =D i -y i ;

[0022] When i=1, the corrected tab spacing is d 1 ′ =D 1 ′ ;

[0023] When i≥2, the corrected tab spacing is d i ′ =D i ′ -D i-1 ′ .

[0024] This plan also includes:

[0025] Obtain the speed value of the anode and cathode pole pieces and the diaphragm being wound on the winding machine;

[0026] Determine whether the speed value is within a preset speed value range. If so, the speed value of the corresponding anode and cathode pole pieces and the diaphragm being wound on the winding machine is normal; if not, the speed value of the corresponding anode and cathode pole pieces and the diaphragm being wound on the winding machine is abnormal, and generate a speed abnormality prompt message;

[0027] The speed abnormality prompt information is sent to a preset management terminal for display.

[0028] In this solution, the step of obtaining the preset speed value range specifically includes:

[0029] Based on a preset speed base, the speed values ​​of winding the cathode and anode pole pieces and the diaphragm on the winding machine are divided into multiple speed intervals;

[0030] Obtain the historical speed values ​​of the winding of the cathode and anode pole pieces and the diaphragm on the winding machine and the historical spacing of the corresponding pole ears;

[0031] When the historical spacing of the tabs is greater than a preset spacing threshold, the corresponding historical speed value is marked to obtain the marked historical speed value;

[0032] Divide the historical speed value according to the speed interval, obtain the quantity value of the historical speed value in each speed interval, and set it as the first quantity value;

[0033] Divide the marked historical speed values ​​according to the speed intervals, obtain the quantity value of the marked historical speed values ​​in each speed interval, and set it as the second quantity value;

[0034] Divide the second quantity value by the first quantity value to obtain a probability value of an error when winding the bare battery cell in the corresponding speed interval;

[0035] When the probability value of an error in winding the bare cell in the corresponding speed interval is less than or equal to a preset probability threshold, the corresponding speed interval is marked to obtain a marked speed interval;

[0036] Sort the marked speed intervals according to the speed values ​​to obtain the marked maximum speed interval;

[0037] The marked maximum speed interval is set as a preset speed value range.

[0038] In this solution, the speed intervals to be marked are sorted according to the speed values, and after obtaining the maximum speed interval to be marked, the method further includes:

[0039] Extract the maximum speed interval from the remaining marked speed intervals and set it as the first speed interval;

[0040] If the speed intervals corresponding to the first speed interval and the preset speed value range are adjacent speed intervals, the first speed interval and the preset speed value range are merged to obtain a revised preset speed value range.

[0041] This plan also includes:

[0042] When the probability value of an error in winding the bare battery cell in the corresponding speed interval is not less than or equal to the preset probability threshold, generating speed interval adjustment information;

[0043] Based on the speed interval adjustment information, each speed interval is divided into two speed sub-intervals;

[0044] Obtain the probability value of error when winding bare cells in each speed sub-interval;

[0045] If the probability value of an error in winding the bare cell in the speed sub-interval is less than or equal to the preset probability threshold, extract the speed sub-interval corresponding to the probability value less than or equal to the preset probability threshold;

[0046] The speed sub-intervals corresponding to probability values ​​less than or equal to the preset probability threshold are sorted according to the speed values ​​to obtain the marked maximum speed sub-interval;

[0047] Setting the marked maximum speed sub-interval to a preset speed value range;

[0048] If the probability value of an error in winding a bare cell in a speed subinterval does not exist and is less than or equal to a preset probability threshold, continue to split the speed subinterval until the probability value of an error in winding a bare cell in the split speed subinterval exists and is less than or equal to the preset probability threshold.

[0049] In this solution, after the speed sub-intervals corresponding to probability values ​​less than or equal to the preset probability threshold are sorted according to the speed values ​​and the marked maximum speed sub-interval is obtained, the method further includes:

[0050] Extract the maximum speed sub-interval from the remaining marked speed sub-intervals and set it as the second speed sub-interval;

[0051] If the speed sub-intervals corresponding to the second speed sub-interval and the preset speed value range are adjacent speed sub-intervals, the second speed sub-interval and the preset speed value range are merged to obtain a revised preset speed value range.

[0052] In this solution, before obtaining the bare cell winding information, the method further includes:

[0053] Get the thickness of the positive and negative electrodes;

[0054] Determine whether the thickness of the positive and negative electrode sheets is within the preset thickness range of the electrode sheets. If so, the corresponding positive and negative electrode sheets are qualified; if not, the corresponding positive and negative electrode sheets are unqualified;

[0055] The qualified positive and negative electrode sheets and the preset separators are wound into bare battery cells on a winding machine.

[0056] The invention discloses a method for correcting misalignment of a tab. The method is simple and easy to operate, and the calculation part can be completely handed over to a calculator, thereby saving time and labor costs. In addition, the corrections of the spacing between each tab are independent of each other and do not interfere with each other, thereby improving the accuracy of the correction of misalignment of the tab. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 A flow chart of a method for correcting tab misalignment of the present invention is shown. DETAILED DESCRIPTION

[0058] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0059] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0060] Figure 1 A flow chart of a method for correcting tab misalignment of the present invention is shown.

[0061] like Figure 1 As shown, the present invention discloses a method for correcting misalignment of a tab, comprising:

[0062] S101, obtaining bare cell winding information;

[0063] S102, extracting the tabs and corresponding tab position information from the bare cell winding information;

[0064] S103, obtaining the corresponding lug number and the corresponding lug cumulative spacing according to the lugs in the bare cell winding information and the corresponding lug position information;

[0065] S104, based on a preset correction equation and according to the tab number, obtaining a revised value of the corresponding tab cumulative spacing;

[0066] S105, revising the accumulated spacing of the tabs according to the revised value of the accumulated spacing of the corresponding tabs, and performing misalignment calculation to obtain the corrected spacing of the tabs.

[0067] According to an embodiment of the present invention, the anode and cathode pole pieces and the diaphragm are wound on a winding machine into a bare battery cell, i.e., the bare battery cell is wound, the pole ears are numbered and the cumulative distance from each pole ear to the preset center position of the first pole ear is measured, and then the accumulated distance of the pole ears is corrected by a preset correction equation, and then the misalignment calculation is performed to obtain the corrected pole ear spacing, which is the distance between adjacent pole ears. When the anode and cathode pole pieces are arranged according to the given pole ear spacing, the waste pole ear material is cut off by a die-cutting machine, and the pole pieces with pole ears are die-cut.

[0068] According to an embodiment of the present invention, the step of obtaining the corresponding tab cumulative spacing specifically includes:

[0069] Get the distance d between two adjacent tabs i ;

[0070] The preset center position of the tab corresponding to the first number is recorded as point L;

[0071] Set the distance from the pole ear numbered i to point L to D i , whose formula is D i =∑ i n＝1 d n , where i∈n, and n represents the number of the tab.

[0072] It should be noted that the first numbered tab corresponds to the innermost tab of the winding. i is the distance between the i-th and i+1-th tabs, d i+1 >d i .

[0073] According to an embodiment of the present invention, the step of obtaining the preset correction equation specifically includes:

[0074] Number the tabs in order from inside to outside to obtain the tab numbers;

[0075] Get the misalignment of any three tabs;

[0076] Based on a preset quadratic equation, the number of the tab is set as the x value, and the misalignment amount of the corresponding tab is set as the y value;

[0077] Input the numbers of any three tabs and the misalignment amounts of the corresponding tabs into the corresponding preset quadratic equation to obtain the corresponding preset revised equation.

[0078] It should be noted that the numbers of any three tabs are set to n 1 、n 2 and n 3 , the misalignment of any three tabs is set to λ 1 , 2 and λ 3, then the coordinate points corresponding to any three pole ears are (n 1 ,λ 1 )、(n 2 ,λ 2 ) and (n 3 ,λ 3 ), (n 1 ,λ 1 )、(n 2 ,λ 2 ) and (n 3 ,λ 3 ) are substituted into the quadratic equation y = A*x 2 +B*x+C, we get the coefficients A, B and C, and get the quadratic equation of the displacement, that is, y(x)=A*x 2 +B*x+C.

[0079] According to an embodiment of the present invention, the step of revising the accumulated spacing of the tabs according to the revised value of the accumulated spacing of the tabs, and performing misalignment calculation to obtain the corrected spacing of the tabs specifically includes:

[0080] The accumulated spacing of the tabs is revised according to the revised value of the accumulated spacing of the corresponding tabs, and the revised accumulated spacing of the tabs D is obtained. ′ i, whose formula is D i ′ =D i -y i ;

[0081] When i=1, the corrected tab spacing is d 1 ′ =D 1 ′ ;

[0082] When i≥2, the corrected tab spacing is d i ′ =D i ′ -D i-1 ′ .

[0083] It should be noted that the correction of each tab spacing is independent of each other and does not interfere with each other.

[0084] According to an embodiment of the present invention, it also includes:

[0085] Obtain the speed value of the anode and cathode pole pieces and the diaphragm being wound on the winding machine;

[0086] Determine whether the speed value is within a preset speed value range. If so, the speed value of the corresponding anode and cathode pole pieces and the diaphragm being wound on the winding machine is normal; if not, the speed value of the corresponding anode and cathode pole pieces and the diaphragm being wound on the winding machine is abnormal, and generate a speed abnormality prompt message;

[0087] The speed abnormality prompt information is sent to a preset management terminal for display.

[0088] It should be noted that the speed values ​​of winding the anode and cathode pole pieces and the diaphragm on the winding machine are limited by presetting the speed value range, standardizing the process requirements to reduce the error in the spacing between the pole tabs.

[0089] According to an embodiment of the present invention, the step of obtaining the preset speed value range specifically includes:

[0090] Based on a preset speed base, the speed values ​​of winding the cathode and anode pole pieces and the diaphragm on the winding machine are divided into multiple speed intervals;

[0091] Obtain the historical speed values ​​of the winding of the cathode and anode pole pieces and the diaphragm on the winding machine and the historical spacing of the corresponding pole ears;

[0092] When the historical spacing of the tabs is greater than a preset spacing threshold, the corresponding historical speed value is marked to obtain the marked historical speed value;

[0093] Divide the historical speed value according to the speed interval, obtain the quantity value of the historical speed value in each speed interval, and set it as the first quantity value;

[0094] Divide the marked historical speed values ​​according to the speed intervals, obtain the quantity value of the marked historical speed values ​​in each speed interval, and set it as the second quantity value;

[0095] Divide the second quantity value by the first quantity value to obtain a probability value of an error when winding the bare battery cell in the corresponding speed interval;

[0096] When the probability value of an error in winding the bare cell in the corresponding speed interval is less than or equal to a preset probability threshold, the corresponding speed interval is marked to obtain a marked speed interval;

[0097] Sort the marked speed intervals according to the speed values ​​to obtain the marked maximum speed interval;

[0098] The marked maximum speed interval is set as a preset speed value range.

[0099] It should be noted that, for example, if the preset speed base is 1 revolution per second, the speed interval can be divided into (0, 1], (1, 2]..., and through historical data, the probability values ​​of errors in the historical speed values ​​of the anode and cathode pole pieces and the diaphragm wound on the winding machine in different speed intervals are determined, so as to determine the speed interval in which the probability value of error is less than or equal to the preset probability threshold, and set it as the marked speed interval, and then set the maximum speed interval in the marked speed interval as the preset speed value range to improve production efficiency.

[0100] According to an embodiment of the present invention, after sorting the marked speed intervals according to the speed values ​​to obtain the marked maximum speed interval, the method further includes:

[0101] Extract the maximum speed interval from the remaining marked speed intervals and set it as the first speed interval;

[0102] If the speed intervals corresponding to the first speed interval and the preset speed value range are adjacent speed intervals, the first speed interval and the preset speed value range are merged to obtain a revised preset speed value range.

[0103] It should be noted that by expanding the preset speed value range through adjacent speed intervals, the speed requirements for winding the anode and cathode pole pieces and diaphragms on the winding machine can be relaxed, thereby reducing errors and alleviating the pressure of maintaining high production.

[0104] According to an embodiment of the present invention, it also includes:

[0105] When the probability value of an error in winding the bare battery cell in the corresponding speed interval is not less than or equal to the preset probability threshold, generating speed interval adjustment information;

[0106] Based on the speed interval adjustment information, each speed interval is divided into two speed sub-intervals;

[0107] Obtain the probability value of error when winding bare cells in each speed sub-interval;

[0108] If the probability value of an error in winding the bare cell in the speed sub-interval is less than or equal to the preset probability threshold, extract the speed sub-interval corresponding to the probability value less than or equal to the preset probability threshold;

[0109] The speed sub-intervals corresponding to probability values ​​less than or equal to the preset probability threshold are sorted according to the speed values ​​to obtain the marked maximum speed sub-interval;

[0110] Setting the marked maximum speed sub-interval to a preset speed value range;

[0111] If the probability value of an error in winding a bare cell in a speed subinterval does not exist and is less than or equal to a preset probability threshold, continue to split the speed subinterval until the probability value of an error in winding a bare cell in the split speed subinterval exists and is less than or equal to the preset probability threshold.

[0112] According to an embodiment of the present invention, after sorting the speed sub-intervals corresponding to the probability values ​​less than or equal to the preset probability threshold according to the speed values ​​to obtain the marked maximum speed sub-interval, the method further includes:

[0113] Extract the maximum speed sub-interval from the remaining marked speed sub-intervals and set it as the second speed sub-interval;

[0114] If the speed sub-intervals corresponding to the second speed sub-interval and the preset speed value range are adjacent speed sub-intervals, the second speed sub-interval and the preset speed value range are merged to obtain a revised preset speed value range.

[0115] It should be noted that, for example, the speed interval (1, 2] is split into (1, 1.5] and (1.5, 2], the unit is laps per second, and each speed interval is divided into two speed sub-intervals of equal size. If the probability value of the bare cell winding error in the speed sub-interval is less than or equal to the preset probability threshold, the speed sub-interval is stopped from being divided; if the probability value of the bare cell winding error in the speed sub-interval is not less than or equal to the preset probability threshold, the speed sub-interval is continued to be split, for example, the speed sub-interval (1.5, 2] is split into speed sub-intervals (1.5, 1.75] and (1.75, 2], and then the probability value of the bare cell winding error in each speed sub-interval is determined until the preset speed value range is found. At the same time, if there are adjacent speed sub-intervals, the second speed sub-interval corresponding to the adjacent speed sub-interval and the preset speed value range are merged to obtain the revised preset speed value range.

[0116] According to an embodiment of the present invention, before obtaining the bare cell winding information, the method further includes:

[0117] Get the thickness of the positive and negative electrodes;

[0118] Determine whether the thickness of the positive and negative electrode sheets is within the preset thickness range of the electrode sheets. If so, the corresponding positive and negative electrode sheets are qualified; if not, the corresponding positive and negative electrode sheets are unqualified;

[0119] The qualified positive and negative electrode sheets and the preset separators are wound into bare battery cells on a winding machine.

[0120] It should be noted that the thickness of the positive and negative electrode sheets is screened by using the preset electrode sheet thickness value range. For example, the preset electrode sheet thickness value range corresponding to the cathode electrode sheet is (144±2μm), and the preset electrode sheet thickness value range corresponding to the anode electrode sheet is (125±2μm). The thickness values ​​of the positive and negative electrode sheets are standardized to improve the consistency of the distance between the electrode tabs.

[0121] The present invention discloses a method for correcting the misalignment of a lug, comprising: obtaining the winding information of a bare cell; extracting the lugs and the corresponding lug position information in the winding information of the bare cell; obtaining the corresponding lug number and the corresponding lug cumulative spacing according to the lugs and the corresponding lug position information in the winding information of the bare cell; obtaining the revised value of the corresponding lug cumulative spacing according to the lug number based on a preset correction equation; revising the lug cumulative spacing according to the revised value of the corresponding lug cumulative spacing, and performing misalignment calculation to obtain the corrected lug spacing. The method of the present invention is simple and easy to operate, and the calculation part can be completely handed over to a calculator, saving time and labor costs; in addition, the corrections of each lug spacing are independent of each other and do not interfere with each other, thereby improving the accuracy of the correction of the misalignment of the lugs.

[0122] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0123] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units; they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0124] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0125] A person of ordinary skill in the art can understand that: all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: mobile storage devices, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks or optical disks, and other media that can store program codes.

[0126] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention can be essentially or partly reflected in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

Claims

1. A method for correcting tab misalignment, characterized in that: include: Get the bare cell winding information; Extract the tabs and corresponding tab position information from the bare cell winding information; According to the tabs in the bare cell winding information and the corresponding tab position information, the corresponding tab number and the corresponding tab cumulative spacing are obtained; Based on the preset correction equation, according to the tab number, a revised value of the corresponding tab cumulative spacing is obtained; The accumulated spacing of the tabs is revised according to the revised value of the accumulated spacing of the corresponding tabs, and the misalignment calculation is performed to obtain the corrected tab spacing; Also includes: Obtain the speed value of the anode and cathode pole pieces and the diaphragm being wound on the winding machine; Determine whether the speed value is within a preset speed value range. If so, the speed value of the corresponding anode and cathode pole pieces and the diaphragm being wound on the winding machine is normal; if not, the speed value of the corresponding anode and cathode pole pieces and the diaphragm being wound on the winding machine is abnormal, and generate a speed abnormality prompt message; Sending the speed abnormality prompt information to a preset management terminal for display; The step of obtaining the preset speed value range specifically includes: Based on a preset speed base, the speed values ​​of winding the cathode and anode pole pieces and the diaphragm on the winding machine are divided into multiple speed intervals; Obtain the historical speed values ​​of the winding of the cathode and anode pole pieces and the diaphragm on the winding machine and the historical spacing of the corresponding pole ears; When the historical spacing of the tabs is greater than a preset spacing threshold, the corresponding historical speed value is marked to obtain the marked historical speed value; Divide the historical speed value according to the speed interval, obtain the quantity value of the historical speed value in each speed interval, and set it as the first quantity value; Divide the marked historical speed values ​​according to the speed intervals, obtain the quantity value of the marked historical speed values ​​in each speed interval, and set it as the second quantity value; Divide the second quantity value by the first quantity value to obtain a probability value of an error when winding the bare battery cell in the corresponding speed interval; When the probability value of an error in winding the bare cell in the corresponding speed interval is less than or equal to a preset probability threshold, the corresponding speed interval is marked to obtain a marked speed interval; Sort the marked speed intervals according to the speed values ​​to obtain the marked maximum speed interval; The marked maximum speed interval is set as a preset speed value range.

2. A method for correcting tab misalignment according to claim 1, characterized in that: The steps of obtaining the corresponding tab cumulative spacing specifically include: Get the distance between two adjacent tabs ; The preset center position of the tab corresponding to the first number is recorded as point L; Set the distance from the pole ear numbered i to point L to , whose formula is ,in ,in Indicates the number of the tab.

3. A method for correcting misalignment of a tab according to claim 1, characterized in that: The step of obtaining the preset correction equation specifically includes: Number the tabs in order from inside to outside to obtain the tab numbers; Get the misalignment of any three tabs; Based on a preset quadratic equation, the number of the tab is set as the x value, and the misalignment amount of the corresponding tab is set as the y value; Input the numbers of any three tabs and the misalignment amounts of the corresponding tabs into the corresponding preset quadratic equation to obtain the corresponding preset revised equation.

4. A method for correcting tab misalignment according to claim 1, characterized in that: The step of revising the accumulated spacing of the tabs according to the revised value of the accumulated spacing of the tabs, and performing misalignment calculation to obtain the corrected spacing of the tabs specifically includes: The accumulated spacing of the tabs is revised according to the revised value of the accumulated spacing of the corresponding tabs to obtain the revised accumulated spacing of the tabs. , whose formula is ; when When the corrected tab spacing is ; when When the corrected tab spacing is .

5. The method for correcting tab misalignment according to claim 1, characterized in that: The marked speed intervals are sorted according to the speed values ​​to obtain the marked maximum speed interval, and the method further includes: Extract the maximum speed interval from the remaining marked speed intervals and set it as the first speed interval; If the speed intervals corresponding to the first speed interval and the preset speed value range are adjacent speed intervals, the first speed interval and the preset speed value range are merged to obtain a revised preset speed value range.

6. A method for correcting misalignment of a tab according to claim 1, characterized in that: Also includes: When the probability value of an error in winding the bare battery cell in the corresponding speed interval is not less than or equal to the preset probability threshold, generating speed interval adjustment information; Based on the speed interval adjustment information, each speed interval is divided into two speed sub-intervals; Obtain the probability value of error when winding bare cells in each speed sub-interval; If the probability value of an error in winding the bare cell in the speed sub-interval is less than or equal to the preset probability threshold, extract the speed sub-interval corresponding to the probability value less than or equal to the preset probability threshold; The speed sub-intervals corresponding to probability values ​​less than or equal to the preset probability threshold are sorted according to the speed values ​​to obtain the marked maximum speed sub-interval; Setting the marked maximum speed sub-interval to a preset speed value range; If the probability value of an error in winding a bare cell in a speed subinterval does not exist and is less than or equal to a preset probability threshold, continue to split the speed subinterval until the probability value of an error in winding a bare cell in the split speed subinterval exists and is less than or equal to the preset probability threshold.

7. A method for correcting misalignment of a tab according to claim 6, characterized in that: After the speed sub-intervals corresponding to probability values ​​less than or equal to the preset probability threshold are sorted according to the speed values ​​to obtain the marked maximum speed sub-interval, the method further includes: Extract the maximum speed sub-interval from the remaining marked speed sub-intervals and set it as the second speed sub-interval; If the speed sub-intervals corresponding to the second speed sub-interval and the preset speed value range are adjacent speed sub-intervals, the second speed sub-interval and the preset speed value range are merged to obtain a revised preset speed value range.

8. The method for correcting tab misalignment according to claim 1, characterized in that: Before obtaining the bare cell winding information, the method further includes: Get the thickness of the positive and negative electrodes; Determine whether the thickness of the positive and negative electrode sheets is within the preset thickness range of the electrode sheets. If so, the corresponding positive and negative electrode sheets are qualified; if not, the corresponding positive and negative electrode sheets are unqualified; The qualified positive and negative electrode sheets and the preset separators are wound into bare battery cells on a winding machine.

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