A modular division tablet all-in-one machine and pole piece tablet manufacturing method thereof

Abstract

The application discloses a die-cutting sheet integrated machine and a sheet manufacturing method for pole pieces, and relates to the technical field of lithium battery pole piece processing equipment. The integrated machine is sequentially provided with a unwinding device, a belt connecting device, a first deviation rectifying integrated machine, a lug laser cutting device, a front and back surface CCD defect detection device, a second deviation rectifying integrated machine, a hardware cutting die, a V-angle die cutting device, a traction cutting device, a CCD size detection device, a defective product throwing device and a vacuum belt conveying device along the conveying direction of the material belt. The laser lug cutting and slitting and the die-cutting sheet manufacturing functions are integrated, the intermediate transfer link is cancelled, and the whole process of the pole piece is integrated and continuously processed. Through the double-column synchronous cutting structure and the whole-line constant tension linkage control, the application can effectively reduce the accumulation of processing errors, improve the forming precision of the pole piece and the quality stability, significantly improve the production efficiency and the site utilization rate, reduce the production and operation cost, and is suitable for large-scale high-precision sheet manufacturing production of the lithium battery pole piece.

Description

Technical Field

[0001] This invention relates to the field of lithium battery electrode processing equipment, and in particular to an integrated die-splitting and electrode-making machine and its electrode-making method. Background Technology

[0002] In the lithium battery manufacturing process, electrode sheet fabrication is one of the core processes in cell manufacturing. Its processing precision and production efficiency directly determine the assembly quality and overall production capacity of the cells. Currently, the industry generally adopts a split processing solution, which uses two independent machines—a laser electrode tab cutting and slitting machine and a die-cutting sheet fabrication machine—to complete the entire electrode sheet processing process in steps.

[0003] Existing laser tab cutting and slitting integrated machines mainly handle positive and negative electrode rolled materials. They process tabs on both sides of the strip using laser cutting, and then slit the strip using metal cutting blades. A common layout is a double-unwinding, four-rewinding system. The specific workflow is as follows: Material is unwound manually or via AGV (Automated Guided Vehicle) at the unwinding device. The strip is then joined by a receiving device. The strip is conveyed by rollers, and positional deviations are detected by a correction sensor. After the correction machine corrects the strip's position, it enters the tab laser cutting station to cut the tabs on both sides. The cut strip undergoes visual defect detection by a front and back CCD defect detection device, followed by secondary correction, and then slit by a metal slitting die. After dimensional inspection and marking, the slit strip is wound up by the rewinding device.

[0004] Existing die-cutting equipment uses the slit rolls as the processing object, sequentially completing electrode forming and sorting. The workflow is as follows: after the roll is unwound by the unwinding device, it is buffered by a buffer mechanism for continuous unwinding. After the strip is corrected by an integrated correction machine, it undergoes defect detection again by a front and back CCD defect detection device. Then, the V-angle cutting device completes the electrode V-angle processing, and the cutting device cuts the strip into individual electrode sheets. After dust removal and CCD size inspection, the formed electrode sheets are discarded by a ejector device to remove defective products with poor dimensions, bent or missing tabs, or excessive defects. Finally, qualified electrode sheets are conveyed to the stacking station via a vacuum belt for feeding.

[0005] The aforementioned split-processing model has several insurmountable drawbacks in actual production: First, the equipment integration level is low, and the site and equipment costs are high. A complete film production process requires two independent core production equipment, which not only results in high equipment procurement costs but also necessitates providing each piece of equipment with its own independent power supply system, control system, transmission mechanism, and maintenance system. Additionally, it requires reserving material transfer channels, equipment maintenance space, and material buffer areas, leading to low factory space utilization and significantly increasing the company's production input and operating costs.

[0006] Secondly, the process involves numerous connection points, resulting in insufficient precision and stability in electrode fabrication. The electrode sheets need to be transferred, unloaded, and repositioned between two machines. During these multiple transfers and positioning processes, quality defects such as material strip misalignment, wrinkles, scratches, and positioning deviations are easily generated. Furthermore, the multi-machine step-by-step processing leads to the accumulation of processing errors, ultimately resulting in poor electrode sheet dimensional consistency and low tab forming precision, causing batch defects and directly affecting the subsequent cell assembly precision and battery performance.

[0007] Third, the production cycle is long and the overall capacity efficiency is low. In the split production mode, material transfer, equipment start-up and shutdown, and secondary positioning calibration all consume a lot of production time, the proportion of waiting time in the process is high, and the production cycle is fragmented; at the same time, traditional die-cutting equipment can only complete the processing of a single electrode sheet at a time, the cutting action is cumbersome, the single cutting operation cycle is long, it is difficult to achieve high-speed continuous production, and it cannot meet the large-scale, batch production needs of the lithium battery industry. Summary of the Invention

[0008] The purpose of this invention is to provide an integrated die-making machine and its electrode-making method, which can realize integrated continuous processing of the entire electrode process, effectively improve the electrode-making accuracy, production efficiency and site utilization, and reduce equipment and production costs.

[0009] To achieve the above objectives, the present invention provides the following technical solution: In one aspect, the present invention provides a die-cutting and sheet-making integrated machine, which is provided in sequence along the conveying direction of the material belt with an unwinding device, a belt splicing device, a first correction integrated machine, an electrode laser cutting device, a front and back CCD defect detection device, a second correction integrated machine, a hardware slitting die, a V-angle die cutting device, a traction cutting device, a CCD size detection device, a defective product ejection device, and a vacuum belt conveyor.

[0010] The unwinding device is used for unwinding and discharging electrode rolls, and is compatible with both manual feeding and AGV automatic feeding modes. The tape splicing device is located downstream of the unwinding device and is used for splicing new and old rolls of material to ensure production continuity. The first correction integrated machine is located upstream of the electrode laser cutting device and works with the tape correction sensor to correct the position of the tape before laser cutting, ensuring the accuracy of the electrode cutting position.

[0011] The electrode laser cutting device uses laser cutting to continuously cut the strip on both sides to form the electrode structure, and is suitable for high-precision processing of various electrode substrates such as aluminum. The front and back CCD defect detection device includes two sets of CCD detection units, which are arranged to correspond to the front and back of the strip respectively. It is used to detect the appearance defects of the strip after the electrode is cut on both sides, and to identify problems such as poor electrode cutting and surface defects of the strip in a timely manner.

[0012] The second alignment machine is located upstream of the metal slitting mold. It is used for secondary alignment of the strip position before slitting, eliminating the strip offset generated during the previous conveying and inspection process, and ensuring the dimensional accuracy of the slitting. The metal slitting mold adopts a metal cutting structure to cut the entire wide strip into multiple independent narrow strips. The V-angle die cutting device is located downstream of the metal slitting mold. Each strip after slitting has a cutting station, which can simultaneously complete the electrode V-angle cutting operation for each strip.

[0013] The traction cutting device has both material strip traction and electrode cutting functions. It is used to traction the material strip to move at a constant speed and cut the material strip into single-piece formed electrode sheets according to the set size. The CCD size detection device is set downstream of the traction cutting device to detect the outer size, tab position and forming accuracy of the cut electrode sheet, and to identify electrode sheets with defects in the previous process and those with poor cutting.

[0014] The defective product rejection device is connected to the CCD size detection device to automatically reject unqualified electrode sheets with poor dimensional accuracy, bent or missing tabs, or excessive defects based on the detection results. The vacuum belt conveyor is located at the downstream end and uses vacuum adsorption to transport qualified electrode sheets. It can directly connect to the downstream stacking station to achieve seamless connection between the sheet making and stacking processes.

[0015] Furthermore, the V-angle die cutting device includes a left V-angle cutting die, a right V-angle cutting die, a left V-angle die servo drive motor, a right V-angle die servo drive motor, a die overall Y-direction adjustment mechanism, and a die X-direction adjustment mechanism. The left V-angle die servo drive motor is connected to the left V-angle cutting die via a cam mechanism, and the right V-angle die servo drive motor is connected to the right V-angle cutting die via a cam mechanism, enabling independent up-and-down movement of the corresponding cutting dies to complete the V-angle cutting action. The die overall Y-direction adjustment mechanism uses a screw adjustment structure to adjust the position of the V-angle cutting die as a whole in the strip width direction (Y direction); the die X-direction adjustment mechanism is used to adjust the positions of the left and right V-angle cutting dies in the strip travel direction (X direction) respectively, adapting to the V-angle processing requirements of different specification electrode sheets.

[0016] Furthermore, the mold X-direction adjustment mechanism includes a right V-angle mold mechanism X-direction adjustment device and a left V-angle mold mechanism X-direction adjustment device, which can achieve precise adjustment of the X-direction position through servo motor drive; the left V-angle cutting mold is also connected to a left V-angle mold mechanism Y-direction adjustment device, which is used to finely adjust the position of the left V-angle cutting mold in the strip width direction to ensure the symmetry and positional accuracy of the left and right V-angle cutting.

[0017] Furthermore, the traction cutting device includes a traction mechanism and a cutting mechanism. The traction mechanism includes a left traction servo drive motor, a right traction servo drive motor, a left traction pressure roller cylinder, and a right traction pressure roller cylinder. The left and right traction pressure roller cylinders drive their corresponding pressure rollers downwards, cooperating with the active rollers to clamp the material strip. The left and right traction servo drive motors drive their corresponding active rollers to rotate, providing stable traction force for the material strip's movement and allowing precise control of the material strip's travel length. The cutting mechanism includes a cutting die servo motor and a cutting die. The cutting die servo motor is connected to the cutting die via a cam mechanism, driving the cutting die to move up and down to complete the electrode cutting action. The single-blade cutting structure simplifies the cutting process, shortens the single cutting cycle, and reduces mechanical matching errors.

[0018] Furthermore, the unwinding device is equipped with two sets and adopts a double unwinding structure, which can realize roll changing without stopping the machine and ensure production continuity; the hardware slitting die cuts the whole strip into two independent strips, and the V-angle die cutting device is equipped with two sets of cutting stations, which can simultaneously perform V-angle cutting operations on the two strips, realize double-row synchronous processing, and greatly improve production efficiency.

[0019] Furthermore, the integrated die-cutting machine also includes a whole-line tension control system. The whole-line tension control system adopts a control mode that combines feedforward prediction and closed-loop feedback. With the traction cutting device as the control core, the tension parameters of upstream unwinding, correction, and each processing station follow the downstream traction speed and tension parameters in real time for dynamic compensation. The speed, tension and station actions of the entire process are synchronized and linked, realizing continuous operation of the material strip without fluctuation, impact, and constant tension throughout the entire process, eliminating problems such as material strip stretching, offset, wrinkling, tab deformation and dimensional deviation caused by tension fluctuation.

[0020] Another aspect of the present invention provides an electrode sheet manufacturing method for the above-mentioned integrated die-splitting and sheet-making machine, comprising the following steps: S1 Unwinding and splicing: The electrode sheet roll is installed to the unwinding device by manual labor or AGV trolley, the unwinding device releases the material strip, and the splicing device completes the splicing of the old and new material strips to ensure continuous production.

[0021] S2 First-stage correction and laser ear cutting: The strip is conveyed by rollers, and the position deviation of the strip is detected by the correction sensor. The first correction integrated machine completes the position correction before laser cutting. After the correction is completed, the electrode laser cutting device continuously cuts on both sides of the strip according to the set parameters to form the electrode structure.

[0022] S3 Defect Detection and Secondary Correction: After the tabs are cut, the strip enters the front and back CCD defect detection station. Two sets of CCD detection units respectively perform appearance defect detection on the front and back of the strip to identify defects such as poor tab forming and strip surface damage. After the detection is completed, the strip goes through the second correction integrated machine to complete the secondary position correction before slitting.

[0023] S4 Slitting and V-Angle Cutting: The hardware slitting die slits the corrected strip into multiple independent strips; the slitting strips enter the corresponding station of the V-angle die cutting device simultaneously, and the V-angle cutting die completes the V-angle cutting of each strip's electrode simultaneously.

[0024] S5 Traction Cutting: The strip after V-angle cutting enters the traction cutting device, where the traction mechanism holds the strip and pulls it at a set speed. After reaching the set length, the cutting die descends to cut the strip into single-piece formed electrode sheets.

[0025] S6 Inspection, Sorting and Unloading: The cut electrode sheets are conveyed to the CCD size inspection station to inspect the shape and size of the electrode sheets and the position accuracy of the tabs; the electrode sheets that are deemed unqualified are automatically rejected by the defective product throwing device, and the qualified electrode sheets are adsorbed and conveyed by the vacuum belt conveyor device and directly supplied to the downstream stacking station.

[0026] Compared with existing technologies, the integrated die-cutting and sheet-making machine and its electrode sheet-making method provided by this invention have the following effective effects: 1. This invention adopts an integrated process of laser tab cutting and slitting followed by direct die-cutting and sheet-making, eliminating the intermediate transfer, secondary positioning, and repeated clamping processes of multiple steps. This achieves seamless connection between slitting, tab cutting, and die-cutting processes, significantly reducing the accumulation of errors caused by multi-equipment step-by-step processing. At the same time, the cutting structure logic is optimized, using a single-blade cutting structure to replace the complex structure of traditional multi-blade group cutting. This simplifies the equipment cutting control program, reduces mechanical matching errors, and avoids electrode sheet burrs, missing corners, and dimensional deviations caused by multi-blade synchronization deviations. This effectively improves the stability of electrode sheet forming quality, reduces product defect rate, and provides reliable support for the standardized and high-precision production of lithium battery cell assembly.

[0027] 2. This invention integrates the laser tab cutting and die-cutting processes, which were originally completed by two separate machines, into a single, continuous operation. This completely eliminates the time lost due to material transfer, waiting, and secondary positioning between processes, enabling continuous production line forming of electrode sheets from raw materials to finished sheets, and significantly optimizing the production cycle. Simultaneously, the invention employs a dual-row synchronous processing structure, where the two strips simultaneously complete V-angle cutting and sheet forming after slitting. Combined with a single-blade cutting structure, this simplifies the cutting process and significantly shortens the time required for a single cutting operation.

[0028] 3. By integrating the functions of two devices into a single unit, the purchase investment in a core production device can be directly reduced, significantly lowering the customer's initial fixed asset investment costs. Simultaneously, the single unit has a more streamlined structure, with a substantial reduction in the number of supporting control systems, transmission components, and auxiliary parts. This significantly reduces the difficulty of daily maintenance, the failure rate, and equipment repair costs, parts replacement costs, and energy consumption. Furthermore, process optimization lowers the product defect rate, reduces raw material waste and rework losses, further compressing production costs and enhancing product market competitiveness.

[0029] 4. This invention significantly reduces the overall footprint of the equipment through functional integration, eliminating unnecessary equipment placement and transit buffer spaces, greatly improving factory space utilization. This helps companies deploy more production lines within limited factory space, increasing overall production capacity density. Simultaneously, the integrated equipment boasts a compact structure and orderly production line layout, facilitating automated logistics integration and standardized production management in the workshop. This helps companies achieve lean production and provides a new technological path for the lightweight, integrated, and efficient upgrading of lithium battery electrode forming processes. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall layout structure of the integrated die-making and film-making machine provided in an embodiment of the present invention.

[0031] Figure 2 This is a schematic diagram of the V-angle mold cutting device provided in an embodiment of the present invention.

[0032] Figure 3 A schematic diagram of the traction cutting device provided in this embodiment of the invention.

[0033] Figure 4 This is a schematic flowchart of the electrode fabrication method of the integrated die-making machine provided in an embodiment of the present invention. Detailed Implementation

[0034] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0035] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0037] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] Please see Figures 1-4 ,like Figure 1 As shown, this embodiment discloses a die-cutting and sheet-making integrated machine, which includes, in sequence along the conveying direction of the material belt, a first unwinding device 1, a second unwinding device 2, a belt splicing device 3, a first correction integrated machine 4, an electrode laser cutting device 5, a front and back CCD defect detection device composed of a front CCD detection unit 6 and a back CCD detection unit 7, a second correction integrated machine 8, a hardware slitting die 9, a first V-angle die cutting device 10, a second V-angle die cutting device 11, a traction cutting device 12, a CCD size detection device 13, a defective product ejection device (not shown in the figure), and a vacuum belt conveyor device 14.

[0040] The first unwinding device 1 and the second unwinding device 2 form a dual unwinding structure, compatible with both manual and AGV automatic feeding, supporting roll changing without stopping the machine and ensuring production continuity. The tape splicing device 3 is located downstream of the two unwinding devices and is used to connect the old and new tapes when the tape rolls are exhausted, avoiding production interruptions. The first tape correction integrated machine 4 is equipped with a tape correction sensor, which can detect the lateral position deviation of the tape in real time and drive the correction mechanism to adjust the tape position, ensuring the positional accuracy of subsequent laser cutting.

[0041] The tab laser cutting device 5 uses laser processing to cut tab structures of a set shape and spacing on both sides of a continuously moving strip, suitable for high-precision processing of tab substrates such as aluminum. The front CCD detection unit 6 and the back CCD detection unit 7 are respectively arranged on the upper and lower sides of the strip, forming a front and back CCD defect detection device, which can simultaneously acquire images of both sides of the strip and identify various appearance defects such as missing tabs, tab burrs, strip scratches, and coating defects.

[0042] The second integrated correction machine 8 is located upstream of the metal slitting die 9. It is used for secondary correction of the strip before slitting, eliminating strip deviation caused during defect detection and conveying, and ensuring dimensional accuracy of slitting. The metal slitting die 9 adopts a metal circular or flat blade structure to cut the entire wide strip into two independent narrow strips, realizing synchronous processing of two rows.

[0043] The first V-angle die cutting device 10 and the second V-angle die cutting device 11 are respectively arranged for the upper and lower two cut strips. They can simultaneously complete the V-angle cutting operation of the two strips, ensuring the consistency of the V-angle cutting position and size of the upper and lower strips, and eliminating the dimensional deviation caused by step-by-step processing.

[0044] like Figure 2 As shown, each V-angle die cutting device includes a left V-angle die servo drive motor 15, a left V-angle cutting die 16, a right V-angle die servo drive motor 17, a right V-angle cutting die 18, a die overall Y-direction adjustment device 19, a right V-angle die mechanism X-direction adjustment device 20, a left V-angle die mechanism X-direction adjustment device 21, and a left V-angle die mechanism Y-direction adjustment device 22. The left V-angle die servo drive motor 15 is connected to the left V-angle cutting die 16 via a cam transmission mechanism, and the right V-angle die servo drive motor 17 is connected to the right V-angle cutting die 18 via a cam transmission mechanism. The rotation of the servo motor drives the cam to drive the cutting die to move up and down reciprocally, completing the V-angle cutting action. The overall Y-direction adjustment device 19 of the mold adopts a screw drive structure, which can manually adjust the overall position of the entire V-angle cutting mechanism in the width direction of the strip; the X-direction adjustment device 20 of the right V-angle mold mechanism and the X-direction adjustment device 21 of the left V-angle mold mechanism adopt a servo drive structure, which can adjust the position of the left and right V-angle cutting molds in the strip travel direction respectively, to adapt to electrode sheets of different lengths; the Y-direction adjustment device 22 of the left V-angle mold mechanism can finely adjust the width direction position of the left V-angle cutting mold to ensure the symmetry of the left and right V-angles.

[0045] The traction cutting device 12 is located downstream of the V-angle cutting station, and has both traction and cutting functions. Its structure is as follows: Figure 3As shown, the assembly includes a left traction servo drive motor 23, a left traction pressure roller cylinder 24, a cutting die servo motor 25, a right traction pressure roller cylinder 26, a right traction servo drive motor 27, and a cutting die 28. The left traction pressure roller cylinder 24 and the right traction pressure roller cylinder 26 drive the upper and lower pressure rollers downwards respectively, cooperating with the active rollers to clamp the material strip; the left traction servo drive motor 23 and the right traction servo drive motor 27 drive the corresponding active rollers to rotate, providing stable conveying traction force for the material strip and precisely controlling the material strip's travel length. The cutting die servo motor 25 is connected to the cutting die 28 via a cam mechanism, driving the cutting die to move up and down, cutting the material strip into single-piece electrode sheets; it adopts a single-blade cutting structure, with simple operation, short cutting cycle, and high precision and stability.

[0046] The CCD size detection device 13 is located downstream of the traction cutting device 12. It can acquire images of the formed electrode sheets, detect parameters such as the length and width dimensions, V-angle dimensions, and tab position and size of the electrode sheets, and identify defective products such as dimensional deviations and tab misalignments. The defective product ejection device is linked with the CCD size detection device 13 to automatically remove electrode sheets deemed unqualified from the conveyor line, preventing defective products from flowing into the next process. The vacuum belt conveyor device 14 adopts a vacuum adsorption belt conveyor, which can stably transport qualified electrode sheets and directly connect to the downstream stacking station to achieve seamless connection between the sheet making and stacking processes.

[0047] This equipment is also equipped with a whole-line tension control system, which adopts a control logic of feedforward prediction and closed-loop feedback. The traction cutting device 12 is the core control point for the speed and tension of the whole line. The tension and speed parameters of each station such as upstream unwinding, correction, laser cutting, slitting, and V-angle cutting are dynamically compensated and adjusted in real time according to the downstream parameters. All mechanisms work together to maintain a constant and stable strip tension throughout the process, eliminating problems such as strip stretching, wrinkling, offset and electrode deformation caused by tension fluctuations, and ensuring the processing accuracy and yield of electrode sheets.

[0048] Please see Figure 4 The specific working process of the integrated die-cutting machine in this embodiment is as follows: The positive and negative electrode rolling rolls are installed by manual labor or AGV trolley to the first unwinding device 1 and the second unwinding device 2. The unwinding device releases the material strip and connects the material strip through the connecting device 3. The material strip is conveyed by rollers. After the material strip deviation sensor detects the deviation of the material strip, the first deviation correction integrated machine 4 completes the position correction. After the deviation correction is completed, the material strip enters the electrode tab laser cutting device 5 to complete the laser cutting of the two electrode tabs.

[0049] After the tabs are cut, the strip passes through the front CCD detection unit 6 and the back CCD detection unit 7 to complete the defect detection on both sides. Then the strip passes through the second correction machine 8 to complete the secondary correction before slitting, and then enters the hardware slitting mold 9 to complete the strip slitting. The entire strip is divided into two independent strips, upper and lower.

[0050] After being cut, the two strips enter the corresponding first V-angle mold cutting device 10 and second V-angle mold cutting device 11 respectively. Before production, the manual adjustment of the mold width direction is completed by the screw structure of the mold overall Y-direction adjustment device 19 and the left V-angle mold mechanism Y-direction adjustment device 22. The cutting position is set in the touch system by the right V-angle mold mechanism X-direction adjustment device 20 and the left V-angle mold mechanism X-direction adjustment device 21. After the strips reach the cutting position, the left and right V-angle mold servo drive motors drive the cams to drive the cutting molds downward, and the V-angle cutting of the two strips is completed simultaneously. After cutting, the strips continue to be conveyed downstream.

[0051] After V-angle cutting, the strip enters the traction cutting device 12. The left traction pressure roller cylinder 24 and the right traction pressure roller cylinder 26 drive the pressure roller to descend and clamp the strip. The left traction servo drive motor 23 and the right traction servo drive motor 27 drive the active roller to traction the strip. When the strip reaches the set electrode length, the cutting die servo motor 25 drives the cutting die 28 to descend and cut the strip into single electrode pieces.

[0052] After being cut, the electrode sheets are conveyed to the CCD size detection device 13 to complete the size accuracy detection. The system identifies unqualified electrode sheets such as those with defects in the previous process, poor cutting size, and poor tabs, and then the defective product rejection device removes them. Finally, the qualified OK electrode sheets are conveyed to the downstream stacking process through the vacuum belt conveyor device 14 to complete the entire sheet making process.

[0053] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A modular sheet-making integrated machine, characterized in that, Along the conveying direction of the material belt, there are sequentially arranged an unwinding device, a belt splicing device, a first correction integrated machine, an electrode laser cutting device, a front and back CCD defect detection device, a second correction integrated machine, a hardware slitting mold, a V-angle mold cutting device, a traction cutting device, a CCD size detection device, a defective product ejection device, and a vacuum belt conveyor. The unwinding device is used for unwinding and discharging the electrode roll material; the splicing device is used for splicing the strip material; the first alignment machine is used for alignment of the strip material position before laser cutting; the electrode tab laser cutting device is used to cut the strip material on both sides to form electrode tabs; the front and back CCD defect detection device is used to detect defects on both sides of the strip material after the electrode tabs are cut; the second alignment machine is used for alignment of the strip material position before slitting; the hardware slitting die is used to slit the entire strip material into multiple independent strips; the V-angle die cutting device is used to simultaneously cut each strip material at a V-angle; the traction cutting device is used to traction the strip material and cut it into single electrode sheets; the CCD size detection device is used to detect the size of the formed electrode sheets; the defective product ejection device is used to reject the defective electrode sheets; and the vacuum belt conveyor is used to transport the qualified electrode sheets to the downstream station.

2. The integrated die-cutting and sheet-making machine according to claim 1, characterized in that, The V-angle die cutting device includes a left V-angle cutting die, a right V-angle cutting die, a left V-angle die servo drive motor, a right V-angle die servo drive motor, a die overall Y-direction adjustment mechanism, and a die X-direction adjustment mechanism; The servo drive motor of the left V-angle mold is connected to the left V-angle cutting mold, and the servo drive motor of the right V-angle mold is connected to the right V-angle cutting mold. They are used to drive the corresponding cutting molds to complete the V-angle cutting action. The overall Y-direction adjustment mechanism of the mold is used to adjust the position of the V-angle cutting mold in the width direction of the material strip, and the X-direction adjustment mechanism of the mold is used to adjust the position of the left and right V-angle cutting molds in the material strip travel direction respectively.

3. The integrated die-cutting and sheet-making machine according to claim 2, characterized in that, The mold X-direction adjustment mechanism includes a right V-angle mold mechanism X-direction adjustment device and a left V-angle mold mechanism X-direction adjustment device. The left V-angle cutting mold is also connected to a left V-angle mold mechanism Y-direction adjustment device, which is used to adjust the position of the left V-angle cutting mold in the strip width direction separately.

4. The integrated die-cutting and sheet-making machine according to claim 1, characterized in that, The traction cutting device includes a traction mechanism and a cutting mechanism; The traction mechanism includes a left traction servo drive motor, a right traction servo drive motor, a left traction pressure roller cylinder, and a right traction pressure roller cylinder. The left and right traction pressure roller cylinders drive the pressure rollers to press down to cooperate with the active rollers to clamp the material belt. The left and right traction servo drive motors drive the corresponding active rollers to rotate to traction the material belt to move forward. The cutting mechanism includes a cutting die servo motor and a cutting die. The cutting die servo motor is connected to the cutting die for driving the cutting die to complete the electrode cutting action.

5. The integrated die-cutting and sheet-making machine according to claim 1, characterized in that, The unwinding device is set with two sets and adopts a double unwinding structure; the metal slitting die cuts the whole strip into two independent strips, and the V-angle die cutting device is set with two sets of cutting stations to simultaneously perform V-angle cutting operations on the two strips.

6. The integrated die-cutting and sheet-making machine according to claim 1, characterized in that, It also includes a whole-line tension control system. The whole-line tension control system adopts a control mode that combines feedforward prediction and closed-loop feedback. With the traction cutting device as the control core, the tension parameters of upstream unwinding, correction, and each processing station follow the downstream traction speed and tension parameters in real time to achieve constant tension continuous conveying of the material strip throughout the entire process.

7. The integrated die-cutting and sheet-making machine according to claim 1, characterized in that, The front and back CCD defect detection device includes two sets of CCD detection units, which are arranged on the front and back sides of the strip respectively; the CCD size detection device is set downstream of the traction cutting device and is used to detect the outer dimensions and tab position accuracy of the electrode sheet after cutting.

8. A method for electrode fabrication using the integrated die-casting machine according to any one of claims 1-7, characterized in that, Includes the following steps: S1 Unwinding and splicing: The electrode roll is released through the unwinding device and spliced ​​by the splicing device; S2 First-stage correction and laser ear cutting: After the material strip completes the position correction by the first correction integrated machine, the ear laser cutting device cuts the material strip on both sides to form the ear; S3 Defect Detection and Secondary Correction: The strip after the tabs are cut is inspected for defects on both sides using a front and back CCD defect detection device. After the inspection is completed, the strip is corrected for position before slitting by a second correction machine. S4 Slitting and V-Angle Cutting: The entire strip is slit into multiple independent strips by a metal slitting die, and then each strip is simultaneously cut at the V-angle by a V-angle cutting device. S5 Traction Cutting: The traction cutting device pulls the material strip forward and cuts it into single-piece formed electrode sheets; S6 Inspection, Sorting and Unloading: The dimensional inspection of the formed electrode sheets is carried out by a CCD size inspection device. The defective electrode sheets are rejected by the defective product rejection device, and the qualified electrode sheets are transported to the downstream stacking station by a vacuum belt conveyor.

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