Fully automatic winding process and apparatus

Abstract

The application relates to the technical field of battery cell production, and particularly discloses a full-automatic winding processing method and equipment, which comprises an electrode tab unwinding process and a diaphragm unwinding process; the electrode tab unwinding process and / or the diaphragm unwinding process comprises the following steps: obtaining a target speed value SV and a current unwinding speed value PV of a material belt; obtaining an unwinding deviation correction speed value V of the material belt by multiplying a preset coefficient with a difference value of SV and PV; and controlling a deviation correction motor of a deviation correction executing mechanism to perform deviation correction at a synchronous speed of the unwinding deviation correction speed value V. Through the above steps, the deviation correction motor can be controlled to perform compensation deviation correction according to the unwinding deviation correction speed value V, so that the control precision of the unwinding speed is improved, the adjustment of the material belt tension is realized, and the problem of poor unwinding speed control precision of the existing winding equipment on the electrode tab and the diaphragm is effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery cell production, and particularly relates to a full-automatic winding processing method and device. BACKGROUND

[0002] In the production process of lithium batteries, winding equipment is used to wind the pole piece and the diaphragm together to form a battery cell, and then the battery cell is subjected to processes such as heat pressing and welding of the pole lug to form a battery product.

[0003] In the winding equipment, the unwinding speed of the strip-shaped pole piece and the diaphragm affects the tension of the material strip during feeding; and the weight of the material roll and the error of the unwinding motor itself can cause the unwinding speed of the pole piece and the diaphragm to change. Since the existing winding equipment has poor precision control over the unwinding speed, the yield of the wound battery cell is affected. SUMMARY

[0004] Therefore, the present application aims to provide a full-automatic winding processing method and device to solve the problem of poor control precision of the unwinding speed of the pole piece and the diaphragm in the existing winding equipment.

[0005] To achieve the above technical purpose, the present application provides a full-automatic winding processing method in a first aspect, comprising: a pole piece unwinding process and a diaphragm unwinding process.

[0006] The pole piece unwinding process and / or the diaphragm unwinding process comprises the following steps:

[0007] Obtaining a target speed value SV of the material strip and a current unwinding speed value PV;

[0008] According to the difference between SV and PV, multiplying a preset coefficient to obtain an unwinding correction speed value V of the material strip;

[0009] Controlling a correction motor of a correction execution mechanism to correct at a synchronous speed of the unwinding correction speed value V.

[0010] Further, the pole piece unwinding process and / or the diaphragm unwinding process further comprises the following steps:

[0011] Obtaining position information of the material strip after unwinding;

[0012] According to the position information, obtaining a deviation degree value of the material strip;

[0013] Controlling the correction execution mechanism to correct according to the deviation degree value of the material strip.

[0014] Further, the obtaining of the deviation degree value of the material strip according to the position information comprises:

[0015] According to the position information, an edge value of the material belt is obtained, and an edge curve of the material belt is calculated according to the edge value of the material belt;

[0016] The edge curve of the material belt is fitted with a preset edge curve to obtain a deviation degree value of the material belt.

[0017] Further, the position information of the material belt is obtained by a distance sensor of the material belt edge and / or a material belt image acquirer.

[0018] Further, the pole piece unwinding process and / or the diaphragm unwinding process further comprises the following steps:

[0019] The real-time tension value and the tension fluctuation range value of the material belt are obtained;

[0020] The tension deviation value is obtained according to the difference between the preset given tension value and the real-time tension value;

[0021] The tension swing arm mechanism adjusts the tension control output value according to the tension deviation value, and outputs a first alarm signal when the tension fluctuation range value exceeds the preset fluctuation limit range value.

[0022] Further, the pole piece unwinding process further comprises the following steps:

[0023] The adsorption mechanism is controlled to suck the cut pole piece to perform a splicing operation after a preset suction vacuum duration;

[0024] After the splicing operation is completed, the adsorption mechanism is controlled to break the vacuum to separate from the pole piece after a preset vacuum breaking duration.

[0025] Further, the tail of the pole piece roll is provided with a tail mark;

[0026] The control of the adsorption mechanism to break the vacuum after a preset vacuum breaking duration and separate from the pole piece further comprises:

[0027] A splicing completion mark is provided for the tail of the pole piece after splicing.

[0028] Further, it further comprises a winding process;

[0029] The winding process comprises the following steps:

[0030] A bare cell image of a plurality of angles of the wound cell is obtained;

[0031] The misregistration amount between adjacent layers in the wound cell is obtained according to the bare cell image;

[0032] It is judged whether the misregistration amount exceeds a warning value, and if so, a warning signal is outputted;

[0033] Judge whether the misplacement amount exceeds a specification value, and output a second alarm signal if so.

[0034] Further, the method further comprises a blanking process, and the blanking process comprises the following steps:

[0035] After controlling the front clamp needle and the rear clamp needle of the blanking clamp needle mechanism to simultaneously insert into the wound battery cell from both ends, the needle of the winder is extracted;

[0036] The front clamp needle and the rear clamp needle are controlled to move to both sides of the radial direction of the wound battery cell to stretch the wound battery cell;

[0037] After the control of the upward movement of the belt to hold the battery cell, the front clamp needle and the rear clamp needle are simultaneously extracted.

[0038] The second aspect of the present application provides a full-automatic winding processing device for executing the full-automatic winding processing method of any one of the above.

[0039] From the above technical solution, it can be seen that the present application provides a full-automatic winding processing method and device, which comprises an electrode sheet unwinding process and a separator unwinding process; the electrode sheet unwinding process and / or the separator unwinding process comprises the following steps: obtaining a target speed value SV of the material belt and a current unwinding speed value PV; obtaining an unwinding correction speed value V of the material belt by multiplying a preset coefficient with the difference between SV and PV; and controlling a correction motor of a correction execution mechanism to perform correction at a synchronous speed of the unwinding correction speed value V.

[0040] Through the above steps, the correction motor can be controlled to compensate and correct according to the unwinding correction speed value V, so as to improve the control accuracy of the unwinding speed, realize the adjustment of the tension of the material belt, and effectively solve the problem of poor control accuracy of the unwinding speed of the electrode sheet and the separator of the existing winding device. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0042] Figure 1 A full-automatic winding processing method provided by an embodiment of the present application is shown in the whole flowchart;

[0043] Figure 2 A process correction flowchart in a full-automatic winding processing method provided by an embodiment of the present application is shown in the whole flowchart;

[0044] Figure 3A proactive deviation correction flowchart in a full-automatic winding processing method provided by the embodiment of the application;

[0045] Figure 4 A tension control flowchart in a full-automatic winding processing method provided by the embodiment of the application;

[0046] Figure 5 A tape splicing flowchart in a full-automatic winding processing method provided by the embodiment of the application;

[0047] Figure 6 A winding process flowchart in a full-automatic winding processing method provided by the embodiment of the application;

[0048] Figure 7 A blanking process flowchart in a full-automatic winding processing method provided by the embodiment of the application. DETAILED DESCRIPTION

[0049] The technical solutions of the embodiments of the application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the specification of the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the application.

[0050] In the description of the embodiments of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the embodiments of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the embodiments of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0052] Please refer to Figures 1 to 2 The first aspect provided in the embodiments of the application provides a full-automatic winding processing method, comprising: a pole piece unwinding process and a separator membrane unwinding process.

[0053] The polar sheet unwinding process can be an anode polar sheet unwinding process or a cathode polar sheet unwinding process. The separator unwinding process can refer to a process of unwinding multiple layers of separators, for example, a process of simultaneously unwinding upper and lower separators.

[0054] The polar sheet unwinding process and / or the separator unwinding process include the following steps of deviation correction:

[0055] S101, obtaining a target speed value SV of the material belt and a current unwinding speed value PV;

[0056] S102, obtaining an unwinding deviation correction speed value V of the material belt by multiplying a preset coefficient with a difference value between SV and PV;

[0057] S103, controlling a deviation correction motor of a deviation correction execution mechanism to perform deviation correction at a synchronous speed of the unwinding deviation correction speed value V.

[0058] Specifically, in the polar sheet unwinding process, the material belt is a positive polar sheet or a negative polar sheet. In the separator unwinding process, the material belt can be an upper separator or a lower separator.

[0059] During unwinding, the material belt needs to have a certain tension. Fluctuation of the tension affects whether the inner layer material of the bare battery cell formed by winding has wrinkles, thereby affecting the quality and service life of the battery cell.

[0060] In this embodiment, the output shaft of the deviation correction motor in the deviation correction execution mechanism can be connected with a deviation correction roller. By obtaining the target speed value SV and the unwinding speed value PV, the unwinding deviation correction speed value V can be calculated. Then the deviation correction motor rotates at the unwinding deviation correction speed value V, thereby driving the material belt on the deviation correction roller to roll at the unwinding deviation correction speed value V, realizing speed correction of the material belt and ensuring that the tension of the material belt is close to the target tension value.

[0061] As can be seen from the above, in this embodiment, V= (SV-PV) x coefficient; wherein the coefficient can be set according to parameters such as the friction of the deviation correction roller, the slip degree of the deviation correction roller and the material belt in actual application.

[0062] It should be noted that the deviation correction execution mechanism can have a remote control function, so that the staff can realize manual and automatic control of the deviation correction motor through a touch screen and other interactive tools, and change the deviation correction target value according to actual needs. At the same time, color marks can be provided on the material belt. The deviation correction execution mechanism further includes a color mark recognition member such as a photoelectric sensor. When the photoelectric sensor detects that the color mark on the material belt has a large fluctuation (abrupt change) in light value, it does not perform deviation correction.

[0063] In another embodiment, please refer to Figure 1 and Figure 3The electrode plate unwinding process and / or the diaphragm unwinding process further comprises the following active deviation correction step:

[0064] S201, acquiring position information of the material belt after unwinding;

[0065] S202, acquiring a deviation degree value of the material belt according to the position information;

[0066] S203, controlling the deviation correction execution mechanism to correct the deviation according to the deviation degree value of the material belt.

[0067] The active deviation correction step can be located before or after the process deviation correction step. The active deviation correction step and the process deviation correction step can be performed once or multiple times during the entire material unwinding process. Through multiple correction, closed-loop control of the material belt can be achieved, and the alignment between the material belts can be improved.

[0068] Specifically, in step S201, the position information of the material belt can be obtained by the active deviation correction mechanism. The active deviation correction mechanism can include a distance sensor and / or a material belt image acquirer. Taking the distance sensor as an example, the distance sensor can include multiple distance sensors arranged in a predetermined area through which the material belt passes and located beside the material belt transmission direction. Thus, multiple distance values from the material belt can be obtained by the multiple distance sensors, and then the deviation degree value of the material belt can be obtained by comparing the multiple distance values with the set distance value. Taking the material belt image acquirer as an example, it can be a CCD camera arranged at multiple angles above the predetermined area through which the material belt passes. After obtaining the running images of the material belt at multiple angles, the processor analyzes the running images at multiple angles and compares them with the preset running path to obtain the deviation degree value of the material belt.

[0069] It should be noted that the deviation correction execution mechanism can include an angle deviation correction component. After the deviation degree value of the material belt is calculated, the angle deviation correction component adjusts the angle and horizontal distance of the material belt.

[0070] In a further improved embodiment, the above step S202 comprises:

[0071] S2021, acquiring an edge value of the material belt according to the position information, and calculating an edge curve of the material belt according to the edge value of the material belt;

[0072] S2022, fitting the edge curve of the material belt with a preset edge curve to obtain the deviation degree value of the material belt.

[0073] Specifically, after the edge value of the material belt is obtained, the edge value can be input into the processor, and after the processor calculates and saves the edge value, the edge curve of the material belt can be displayed on the operation terminal of the worker, so that the worker can know the edge of the material belt in real time. Then, the processor fits the edge curve to obtain the deviation degree value of the material belt.

[0074] The preset edge curve of the material belt can be obtained by simulating the material belt walking calculation, or by taking the average of the edge curves of the material belt in multiple normal actual walking processes.

[0075] As an implementation, between steps S202 and S203, the size of the deviation degree value of the material belt can also be judged. When it is judged that the deviation degree value of the material belt exceeds the preset limit value, the machine is stopped after extending for a preset interval, such as 2 seconds.

[0076] In another embodiment, please refer to Figure 1 and Figure 4 The pole piece unwinding process and / or the diaphragm unwinding process further include the following tension control steps:

[0077] S301, obtaining the real-time tension value and the tension fluctuation range value of the material belt;

[0078] S302, obtaining the tension deviation value according to the difference between the preset given tension value and the real-time tension value;

[0079] S303, controlling the tension swing arm mechanism to adjust the tension control output value according to the tension deviation value, and outputting a first alarm signal when the tension fluctuation range value exceeds the preset fluctuation limit range value.

[0080] Specifically, the tension swing arm mechanism can include a plurality of tension rollers, and the material belt is arranged on the tension rollers. The tension of the tension rollers can be adjusted, and the tension is accurate to 1 gf. The tension of the tension rollers changes in real time, and the adjustment response time is ≤0.5s.

[0081] In this embodiment, the tension allowable range of the pole piece can be set to 100-1000 gf, and the tension allowable range of the diaphragm can be set to 80-500 gf. According to the tension allowable range of the diaphragm and the tension, the preset fluctuation limit range value of the two can be obtained. On the one hand, the tension swing arm mechanism adjusts the tension output control value through the tension deviation value, so that the tension of the material belt approaches the preset given tension value. On the other hand, by setting the preset fluctuation range limit value, the first alarm signal can be sent when the limit value is exceeded to remind the worker, and the corresponding battery cell can be rejected as NG after the first alarm signal is sent.

[0082] It should be noted that the tension real-time change data needs to be connected with the processor and uploaded to the processor for storage, and is bound with the battery cell barcode, so that the tension curve can be viewed in real time.

[0083] The tension swing arm mechanism can adopt a balanced tension structure, and the tension is controlled through a servo motor torque mode, and a bridge type tension sensor is used for tension detection and closed-loop control, so that the tension fluctuation in the uniform speed section is less than or equal to 5%.

[0084] As an embodiment, please refer to Figure 1 In this embodiment, the pole piece and the diaphragm have automatic roll changing function when unwinding, and the roll changing time is less than or equal to 15s; in a manual state, the automatic roll changing can be realized through touch screen operation, interactive equipment or button operation. In addition, all the hanging shafts in the winding equipment can be set and switched through the touch screen and other interactive equipment, and the hanging shafts with the same function can be switched through the button.

[0085] In the pole piece unwinding process, a dust removal step of brushing powder can be further included, and the pole piece can be brushed and blown to remove dust. In the diaphragm unwinding process, a powder and static electricity removal step can be included: double-sided iron powder removal is performed before the diaphragm is wound, a square strong magnet is used to adsorb the iron powder, and the adsorbed iron powder is easy to clean, and the blowing dust removal function can be included; wherein the distance between the magnet and the diaphragm is adjustable. A double-sided ion wind static electricity removal structure is arranged before the diaphragm is wound, and dust and static electricity are removed by inductive static electricity; wherein the static electricity rod is provided with a function of preventing the diaphragm from being broken. After the diaphragm is unwound, a good label sensor, material end detection sensor and other sensor structures can be arranged, and the incoming material early warning function and the blue label early detection function are provided.

[0086] In actual application, a warning mark and a color mark can be arranged on the diaphragm roll, and the warning mark needs to be removed when the alarm is detected, and the color mark needs to be removed when the alarm is detected.

[0087] In another embodiment, please refer to Figure 5 The pole piece unwinding process further includes the following steps:

[0088] S401, control the adsorption mechanism to suck the cut pole piece through a preset vacuum time, and then perform the tape splicing operation;

[0089] S402, after the tape splicing operation is completed, control the adsorption mechanism to break the vacuum through a preset vacuum breaking time, and then separate from the pole piece.

[0090] Specifically, the splicing step refers to the process of splicing the tail of one pole piece roll with the head of another pole piece roll after the pole piece roll is finished. Taking the adsorption mechanism as an example, the adsorption mechanism is used to adsorb the pole piece by the suction cup. In step S401, after the suction cup adsorbs the pole piece, a preset suction vacuum time is kept, so that the pole piece can be firmly adsorbed. In step S402, when the suction cup breaks the vacuum to unload the pole piece, a preset breaking vacuum time is kept, so that the pole piece can be fully broken. The preset suction vacuum time and the preset breaking vacuum time can be 0.5s.

[0091] As a further improvement, the tail of the pole piece roll is provided with a tail mark; after the above step S402, it further comprises:

[0092] S403, setting a splicing completion mark for the tail of the spliced pole piece.

[0093] Specifically, through the tail mark on the pole piece, automatic detection of the end of the pole piece roll can be realized. The detection can also be realized by checking the end non-coated film material or roll diameter calculation (roll diameter detection deviation ≤±1%) to determine the end of the roll material.

[0094] In step S403, by setting the splicing completion mark, if only the tail mark is detected and the splicing completion mark is not detected during the actual unwinding process, it indicates that the roll is about to be used up, so that the end of the roll material can be determined in advance.

[0095] After splicing is completed, a roll diameter calculation can be performed to collect data.

[0096] Wherein, the arc length formula of winding is L=n×π×D / 360, wherein L is the arc length, n is the central angle, and D is the diameter; after the roll diameter calculation starts, the actual positions n1 and n2 of the two positions and the actual positions L1 and L2 of the unwinding tension swing rod are recorded in the order, so the initial roll diameter D=(((L1-L2)×360) / ((n1-n2)×π).

[0097] In the pole piece unwinding process, after the process correction step, a material feeding correction step can also be included; in the material feeding correction step, the correction detection range is ≥±3.5mm; the material feeding correction motor movement range is ≥±20mm, the detection accuracy range is ≤0.02mm and the correction accuracy is ≤0.1mm; in actual application, the motor and sensor selection can be confirmed according to the above parameters. When the clamp rod is corrected, the next bare cell winding material needs to be automatically returned to the original position, and the pole piece overhang is ≤±0.50mm.

[0098] In the material feeding correction step, the tab detection sensor can be used to detect the tabs of the pole piece, so that the sensor can detect whether each tab width is smaller than the standard tab width, and if so, an alarm is given and the pole piece is removed.

[0099] In actual application, the relative positions between the feeding position and the material do not change during the feeding and winding process, the feeding length can be adjusted by the parameter setting column of the touch screen, the accuracy of the position of the pole piece is ≤±0.5mm, and the accuracy of the position of the head of the pole piece in the bare cell is ≤±1mm.

[0100] In the feeding correction step, after the pole piece is cut off, the pole piece mark hole can be automatically detected or the pole piece is cut off after a certain length after the number of tabs is counted, and the length cutting function can also be realized, the accuracy of the cutting position of the pole piece is ≤±0.5mm, and the inclination is ≤0.2mm.

[0101] After the feeding correction step, a pre-winding step can also be included; the pre-winding step is performed on the pre-winding station. On the pre-winding station, the tab flattening of the winding needle adopts a Mylar (elastic) flattening method; the translation motor adopts an absolute positioning method to keep the distance between the flattening plate and the tab on the winding needle at 4mm; the tab folding sensor detects the bare cell with a tab width of 8mm*8mm or more folded on the winding needle, and gives an alarm prompt, and the NG product with poor tab folding is memorized and discharged.

[0102] In other embodiments, please refer to Figure 1 and Figure 6 , the winding process comprises the following steps:

[0103] S501, obtaining a bare cell image of a plurality of angles of the wound cell after winding;

[0104] S502, obtaining a misalignment amount between adjacent layers in the wound cell after winding according to the bare cell image;

[0105] S503, judging whether the misalignment amount exceeds a warning value, and outputting a warning signal if yes;

[0106] S504, judging whether the misalignment amount exceeds a specification value, and outputting a second alarm signal if yes.

[0107] Specifically, the winding process can be performed on the winding station; in the pole piece unwinding process and the separator unwinding process, the alignment accuracy of the separator and the separator, the separator and the pole piece, and the pole piece and the pole piece is ≤±0.5mm through multiple correction steps. The winding motor on the winding station can use speed synchronization control to ensure stable tension of the material line of the whole machine, avoid violent shaking of the pole piece and the separator, and ensure the process of wrapping the separator around the pole piece through the above mechanism design.

[0108] In steps S601 to S604, CCD detection mechanism can be used; the CCD detection mechanism can adopt multiple, for example, four 200W visual CCD cameras, take multiple angle images of the bare cell after winding, for example, from the four angle positions, so as to obtain the images of the position between the cathode sheet, the anode sheet and the upper and lower separators, and then calculate the image to obtain the error position. Among them, the maximum value, minimum value and average value of the multiple error positions between the adjacent layers in the cell can be taken, and the maximum value, minimum value and average value are verified respectively in the subsequent calculation process to ensure the accuracy of the CCD detection.

[0109] Taking the average value of multiple error positions as an example: the average value of multiple error positions can be displayed on the interactive device of the staff in the form of scattered point connection line, and saved to the processor and the cell barcode binding. When the error position exceeds the warning value, the pre-tightening signal is output, and at this time the interactive device can be rotated to alarm stop or alarm but not stop; the alarm prompt can be performed during the edge grabbing time. When the error position exceeds the specification value, the second alarm signal is output and the cell is marked as NG.

[0110] Further, please refer to Figure 1 and Figure 7 , further comprising: a blanking process; the blanking process comprises the following steps:

[0111] S601, after controlling the front clamp needle and the rear clamp needle of the blanking clamp needle mechanism to insert into the wound cell from both ends at the same time, control the needle extraction;

[0112] S602, control the front clamp needle and the rear clamp needle to move to the two sides of the radial of the wound cell to stretch the wound cell;

[0113] S603, after controlling the pull belt to move up to hold the cell, control the front clamp needle and the rear clamp needle to extract the needle at the same time.

[0114] Specifically, the blanking process can be carried out on the blanking station; the blanking station is provided with a blanking clamp needle mechanism; the blanking clamp needle mechanism comprises a front clamp needle and a rear clamp needle.

[0115] In step S703, since the cell is transferred from the front clamp needle and the rear clamp needle to the pull belt, the front and rear of the cell are clamped by the front clamp needle and the rear clamp needle respectively, so that the effect of preventing the cell from deforming and extracting the core can be achieved, and the cell can be pre-pressed and formed in the clamped state by the front clamp needle and the rear clamp needle, thereby effectively ensuring the tab misplacement and cell deformation.

[0116] After step S703, the pull belt drives the cell to be blanked; wherein the qualified cell is downwardly moved with the pull belt and the pull belt rightwardly rotates to convey the cell into the next station; the unqualified cell is downwardly moved with the pull belt, and the belt leftwardly rotates to move the defective cell into the waste box.

[0117] Wherein, the front and rear clamping needles can be controlled by positive and negative screw rod cooperating with servo motor, and the cell opening distance can be parameterized controlled; the blanking clamping needle mechanism can adopt the way of rubber coating roller cooperating with clamping needle to clamp the cell, effectively avoiding clamping damage to the cell, and the clamping pressure is controlled by a precision pressure regulating valve.

[0118] It should be noted that in the blanking clamping needle mechanism, the lifting control of the pull belt and the lifting control of the front and rear clamping needles can be provided with brake function. At the same time, the light emitting and photoelectric detection can be used to detect the pull needle defect on the blanking station, and an alarm prompt and a defective product mark can be given; the maximum output pressure of the bare cell pre-pressing is >5000kgf, the accuracy is ±100.0kgf; the pre-pressing time is settable 1.0~10.0s, and the pre-pressing does not damage the cell; the parallelism between the pressing plate and the lower pressing surface is ≤0.1mm.

[0119] In another embodiment, please refer to Figure 1 It also includes a terminal adhesive tape sticking process; the terminal adhesive tape sticking process can be carried out on the terminal adhesive tape sticking station. The terminal adhesive tape sticking station can be provided with a rubber paper pulling mechanism and a rubber paper sticking mechanism; wherein, the rubber paper pulling mechanism is used to pull out and cut off the rubber paper in a roll shape according to the length required by the process, and provide it to the rubber roller; the rubber paper sticking mechanism is used to transfer the rubber paper adsorbed on the rubber roller to the cell winding the last circle by swinging, which may be stuck on the diaphragm or cathode sheet according to the process.

[0120] In the terminal adhesive tape sticking station, the servo motor in the rubber paper pulling mechanism can adopt two modes of fixed length cutting and mark cutting; in the mark cutting mode, the servo motor can identify the mark hole position by movefeed instruction to execute the rubber pulling action. The servo motor in the rubber paper sticking mechanism is changed to torque mode during the rubber sticking process, and the rubber sticking torque of the rubber sticking roller can be set on the touch screen; at the same time, the terminal adhesive tape sticking station is provided with a vacuum detection device, which will alarm when the vacuum is not sucked.

[0121] The second aspect of the present application provides a full-automatic winding processing equipment for executing any one of the full-automatic winding processing methods.

[0122] Specifically, the full-automatic winding processing equipment provided by the embodiment can be provided with a pole piece unwinding station, a diaphragm unwinding station, a diaphragm cutting station, a winding station, a terminal adhesive tape sticking station, a blanking station, an ejection pull belt station, a cell transfer station, a cutting and adhesive tape sticking station and a protective adhesive tape sticking station.

[0123] The pole piece unwinding station includes a deviation correction execution mechanism, a suction mechanism and a tension swing arm mechanism, which are used to execute the pole piece unwinding process.

[0124] The diaphragm unwinding station includes a deviation correction execution mechanism, a suction mechanism and a tension swing arm mechanism, which are used to execute the diaphragm unwinding process.

[0125] The cutting knife on the cutting film station is controlled by a temperature controller; the cutting knife temperature is adjustable between 150-240℃, the temperature control accuracy is ±5℃, and the temperature rising time is ≤10min (25℃→180℃).

[0126] The winding module is provided on the winding station; the winding module includes a winding needle, a locking mouth, and a support; the turret, the winding needle, and the locking mouth are all arranged on the rack; the winding needle is used to clamp or release the cut film and the pole piece, is driven to rotate by a motor, and is separated from the battery after winding is completed; the locking mouth corresponds to the winding needles of the three sub-stations, and is used to assist the winding needle to open and clamp.

[0127] The servo motor in the rubber pulling mechanism on the termination rubber sticking station can adopt two modes of fixed length cutting and mark cutting; in the mark cutting mode, the servo motor can recognize the mark hole position to perform the rubber pulling action through the movefeed instruction. The servo motor in the rubber sticking mechanism is changed to torque mode during the rubber sticking process, and the rubber sticking torque of the rubber sticking roller can be set on the touch screen; at the same time, a vacuum detection device is arranged on the termination rubber sticking station, and an alarm will be given when the vacuum is not sucked.

[0128] The blanking station is used to perform the above-mentioned blanking process.

[0129] The outfeed belt pulling station can adopt four-stage belt pulling control to transport the battery, and in-situ detection is arranged at the corresponding position to complete the corresponding position function on the corresponding belt; the cold pressing servo control is used on the outfeed belt pulling station, so that in the manual state, the cold pressing parameters such as cold pressing pressure, cold pressing pressure holding time, and pressure compensation can be set on the touch screen, the cold pressing calibration function is provided, and the control accuracy is ensured.

[0130] The detection photoelectricity is used on the battery transfer station to judge whether the battery is in place, and the roller slope surface is used to store the NG pole group. The battery transfer station is provided with a hollow rotating platform controlled by a servo motor to transfer the battery, which can realize 90° or 180° rotation of the battery.

[0131] The cutting and sticking station can adopt fixed length mode, mark hole mode, and pole lug interval mode to find the cutting position, and is provided with a rubber belt buffer module to ensure that the rubber sticking action does not affect the winding efficiency; the rubber pulling servo motor can be arranged on the cutting and sticking station to control the rubber taking length.

[0132] Specifically, the cutting and taping work station is used for the taping protection process, which can include a tape feeding module, a tape buffer module, a glue feeding module and a double-sided taping module; the tape feeding module uses a non-contact damper to provide resistance, which can be freely adjusted according to the tape specifications to prevent tape deformation. The tape buffer module is used for the glue storage action before pulling the glue and the glue shortage detection; when the buffer module reaches the lower limit when the tape is used up, it can be identified by the glue shortage detection sensor. The glue feeding module can pull the tape at a set speed and feed the glue, and a hidden tape cutter with a non-sticky surface design is used, which can be quickly disassembled, increasing the safety and service life of cutting, while not affecting the structure maintenance. The double-sided taping module uses a double-station suction plate to continuously tape twice to complete the taping action of the cathode 4-way protection glue, and has a 180° reversible glue plate; the double-sided taping module is used for taping towards the pole piece side and waiting for taping, and the non-pole piece side is ready for taping, and the taping action can be performed simultaneously.

[0133] The taping protection work station is equipped with a security door and has a locking function, personnel cannot reach into the component movement area from other areas, and effective physical isolation is provided; the taping protection work station has a warning function for poor taping, and can automatically re-tape when poor taping is found; the tape roller and the pressing plate on the taping protection work station are designed to prevent sticking, and the tape roll and the taping position are equipped with glue detection photoelectricity.

[0134] The above-mentioned pole piece unwinding work station and the separator unwinding work station can further include an expansion mechanism, an ear guiding and smoothing plate and a pole piece traction structure.

[0135] The expansion mechanism includes a plurality of expansion shafts for hanging the tape; the expansion shafts can be mechanically expanded to feed and fix; the expansion shafts are provided with rolling bearings for easy feeding and discharging; the maximum bearing capacity of the expansion shaft is ≤200kg; the expansion shaft includes a plurality of expansion blocks uniformly distributed on the expansion shaft; the surface of the expansion block is treated with a net pattern to increase friction; the shaft center of the expansion shaft and the expansion block adopt a face-to-face contact type, which can make the stability of the expansion shaft better and the service life longer than the existing line-to-face contact type, and the maximum load deformation of the expansion shaft structure is 0.15mm.

[0136] The expansion mechanism further includes a feeding shaft, which can be provided with a crosshair for easy positioning; meanwhile, the feeding shaft can be provided with an adjustable stop block.

[0137] The ear guiding and smoothing plate is made of stainless steel with iron fluorine on both sides; when the ear enters the next roller from the previous roller, it is guided into the roller through the arc surface of the ear guiding and smoothing plate, reducing the friction damage to the ear during equipment operation.

[0138] The pole piece traction structure adopts a direct connection type servo drive structure, which matches the winding needle line speed, responds quickly, and the line speed fluctuation is ≤1.5%.

[0139] The above are preferred embodiments of the present application, and are not used to limit the present application, and for those skilled in the art, based on the above description, the technical solutions described in the foregoing examples can be modified, or some technical features can be replaced by equivalent, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fully automatic winding process, characterized by, Comprising: an electrode sheet unwinding process and a separator unwinding process; the electrode sheet unwinding process and / or the separator unwinding process comprises the following steps: acquiring position information of the material belt after unwinding; acquiring an edge value of the material belt according to the position information, and calculating an edge curve of the material belt according to the edge value of the material belt; fitting the edge curve of the material belt with a preset edge curve to obtain a deviation degree value of the material belt; acquiring a target speed value SV and a current unwinding speed value PV of the material belt; multiplying the difference between SV and PV by a preset coefficient to obtain an unwinding deviation speed value V of the material belt, wherein the influence parameters of the preset coefficient include the friction of the deviation roller and the slip degree between the deviation roller and the material belt; controlling the deviation execution mechanism to deviate according to the deviation degree value of the material belt, and controlling the deviation motor of the deviation execution mechanism to deviate at a synchronous speed of the unwinding deviation speed value V to drive the material belt on the deviation roller to roll at the unwinding deviation speed value V.

2. The fully automatic winding process according to claim 1, characterized in that The position information of the material belt is obtained by a material belt edge distance sensor and / or a material belt image acquirer.

3. The fully automatic winding process according to claim 1, characterized in that, The electrode sheet unwinding process and / or the separator unwinding process further comprises the following steps: acquiring a real-time tension value and a tension fluctuation range value of the material belt; obtaining a tension deviation value according to the difference between a preset given tension value and the real-time tension value; controlling the tension swing arm mechanism to adjust the tension control output value according to the tension deviation value, and outputting a first alarm signal when the tension fluctuation range value exceeds a preset fluctuation limit range value.

4. The fully automatic winding process according to claim 1, characterized in that, The electrode sheet unwinding process further comprises the following steps: controlling the adsorption mechanism to adsorb the cut electrode sheet to perform a splicing operation after a preset adsorption vacuum time; After the splicing operation is completed, the adsorption mechanism is controlled to break the vacuum for a preset vacuum breaking time and then separates from the electrode sheet.

5. The fully automatic winding process according to claim 4, characterized in that The tail of the electrode sheet roll is provided with a tail mark. The control of the adsorption mechanism to break the vacuum for a preset vacuum breaking time and then separate from the electrode sheet further comprises: setting a splicing completion mark for the tail of the electrode sheet after splicing.

6. The fully automatic winding process according to claim 1, characterized in that Further comprising: a winding process; the winding process comprises the following steps: acquiring a bare cell image of a plurality of angles of the wound cell; acquiring a misregistration amount between adjacent layers in the wound cell according to the bare cell image; judging whether the misregistration amount exceeds a pre-warning value, and outputting a pre-warning signal if so; judging whether the misregistration amount exceeds a specification value, and outputting a second alarm signal if so.

7. The fully automatic winding process according to claim 1, characterized in that Further comprising: a discharging process; the discharging process comprises the following steps: after controlling the front and rear clamping needles of the discharging clamping needle mechanism to simultaneously insert into the wound cell from both ends, controlling the needle to be extracted; controlling the front and rear clamping needles to move to the two sides of the radial direction of the wound cell to stretch the wound cell; after controlling the pull belt to move up to hold the cell, controlling the front and rear clamping needles to simultaneously extract the needle.

8. A fully automatic winding processing apparatus characterized by comprising: A full-automatic winding processing method for executing any one of claims 1-7.

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