A cutting and rolling integrated machine

Abstract

This invention provides an integrated cutting and winding machine, relating to the field of battery manufacturing technology. The machine includes an unwinding mechanism, a feeding clamping roller, a feeding mechanism, a laser cutting mechanism, and a winding mechanism. The unwinding mechanism unwinds the electrode sheets, the laser cutting mechanism simultaneously laser-cuts the tabs on the electrode sheets, the feeding clamping roller feeds the sheets into the feeding mechanism, and then the feeding mechanism feeds them into the winding mechanism for winding. Compared to existing technologies, this invention uses the feeding clamping roller to unidirectionally transport the electrode sheets, preventing electrode sheet retraction during station changes in the winding mechanism and ensuring continuous electrode sheet transport. This achieves continuous, stable, and uniform electrode sheet transport without requiring machine stoppage for rewinding, ensuring continuous winding of the separator electrode sheets, eliminating auxiliary time, and allowing all mechanisms to operate synchronously without individual start / stop, thus improving overall machine production efficiency. Furthermore, the elimination of a buffer mechanism avoids problems such as tab kinking and tab misalignment, improving winding quality.

Description

Technical Field

[0001] This invention relates to the field of battery manufacturing technology, and more specifically, to a cutting and rolling integrated machine. Background Technology

[0002] Currently, in the process of producing battery cells using integrated cutting and winding machines for lithium batteries, it is necessary to laser-cut foil to produce tabs before winding the cells. To prevent the cutting section from breaking the electrode sheets and causing the machine to stop due to the excessive speed of the winding section, existing integrated cutting and winding machines typically use a large buffer mechanism to store the cut electrode sheets. By adjusting the cutting speed to match the speed of the winding section, the machine can avoid stopping and affecting efficiency. However, due to excessive roller passing, the buffer mechanism is prone to problems such as excessive electrode wrap angle, causing electrode tab folding and deviation, which affects the quality of the wound cells.

[0003] Furthermore, winding a core involves auxiliary actions and normal winding actions. The auxiliary actions before and after normal winding are the main components of the entire cell winding process, and the length of the auxiliary time directly affects the efficiency of the entire equipment. Most existing winding machines use the method of changing the winding speed to achieve coil changing. This method has many problems. For example, the switching of actions results in frequent acceleration and deceleration, as well as the waiting of the electrode sheets, which leads to a long auxiliary time and cannot further improve efficiency. Secondly, the disc structure of the mechanism itself means that other auxiliary actions cannot be synchronized when changing stations. Each action needs to be started and stopped separately, and the frequent acceleration and deceleration make it difficult to control the tension, resulting in large fluctuations. The electrode sheets and separators are prone to deviation, which affects the alignment of the core, wrinkling of the inner ring of the cell, and other problems. Summary of the Invention

[0004] The objectives of this invention include, for example, providing a cutting and winding integrated machine that can avoid downtime, ensure continuous winding of diaphragm electrodes, eliminate auxiliary time, synchronize the operation of each mechanism, avoid individual start-stop, improve the overall production efficiency of the machine, and at the same time eliminate the buffer mechanism to avoid problems such as electrode tab folding and electrode tab misalignment, thereby improving winding quality.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a cutting and winding integrated machine, comprising an unwinding mechanism, a feeding clamping roller, a feeding mechanism, a laser cutting mechanism, and a winding mechanism. The unwinding mechanism is used to unwind electrode sheets. The feeding mechanism is disposed on the feeding side of the winding mechanism and is used to feed the electrode sheets into the winding mechanism. The feeding clamping roller is disposed on the feeding side of the feeding mechanism and is used to tumble and clamp the electrode sheets and unidirectionally convey the electrode sheets toward the feeding mechanism. The laser cutting mechanism is disposed between the unwinding mechanism and the feeding clamping roller and is used to perform synchronous laser cutting on the electrode sheets. The winding mechanism has multiple winding stations for continuous winding of the electrode sheets and diaphragms. The feeding clamping roller is also used to continuously feed the electrode sheets to the feeding mechanism when the winding mechanism changes stations and to prevent the electrode sheets from retracting.

[0007] In an optional embodiment, the feeding clamping roller includes a clamping roller bracket, a first unidirectional clamping roller, and a second unidirectional clamping roller. The clamping roller bracket is disposed on the feeding side of the feeding mechanism. The first unidirectional clamping roller and the second unidirectional clamping roller are rotatably disposed on the clamping roller bracket and form a unidirectional clamping channel for the electrode sheet to pass through. Both the first unidirectional clamping roller and the second unidirectional clamping roller rotate in one direction and are used to unidirectionally convey the electrode sheet toward the feeding mechanism.

[0008] In an optional embodiment, the feeding clamping roller further includes a feeding drive component, which is connected to the first unidirectional clamping roller and / or the second unidirectional clamping roller for driving the first unidirectional clamping roller and / or the second unidirectional clamping roller to rotate in one direction.

[0009] In an optional embodiment, a clamping plate is further provided on the discharge side of the unidirectional clamping channel. The clamping plate is located on the infeed side of the feeding mechanism and is used to guide the electrode sheet and guide the electrode sheet into the feeding mechanism.

[0010] In an optional embodiment, the feeding mechanism includes an electrode cutter and a feeding clamping roller. The electrode cutter is disposed between the feeding clamping roller and the winding mechanism for cutting the electrode. The feeding clamping roller is disposed between the electrode cutter and the winding mechanism for rolling and clamping the electrode and feeding the electrode into the winding mechanism.

[0011] In an optional embodiment, the winding mechanism includes a winding reel, a plurality of winding needles, and a diaphragm cutter. The plurality of winding needles are rotatably disposed on the winding reel and form a plurality of winding stations. The winding reel is rotatably disposed on a mounting plate to rotate and switch the winding stations. The diaphragm cutter is movably disposed on one side of the winding station near the feeding mechanism to move closer to or away from the winding station and to cut the diaphragm.

[0012] In an optional embodiment, the diaphragm cutter includes a cutter drive, a cutting blade, and a rotating roller. The rotating roller is rotatably disposed at one end of the cutter drive and can move closer to or further away from the winding needle under the drive of the cutter drive. The cutting blade is disposed on the rotating roller and is used to cut the diaphragm when the surface linear velocity of the rotating roller is the same as the linear velocity of the diaphragm.

[0013] In an optional embodiment, the winding mechanism further includes a diaphragm pressing assembly, which is movably disposed on one side of the winding station near the feeding mechanism, for pressing onto the winding needle so that the diaphragm adheres to the winding needle.

[0014] In an optional embodiment, the diaphragm pressing assembly includes a diaphragm pressure roller and a pressing drive. The diaphragm pressure roller is rotatably disposed at one end of the pressing drive and can move closer to or further away from the winding needle under the drive of the pressing drive. The diaphragm pressure roller is used to roll and press onto the winding needle.

[0015] In an optional embodiment, the laser cutting mechanism includes at least one laser generator, which is disposed between the unwinding mechanism and the feeding clamping roller, and is positioned on one side of the electrode sheet for synchronous laser cutting of the electrode sheet.

[0016] The beneficial effects of the embodiments of the present invention include, for example:

[0017] The integrated cutting and winding machine provided in this invention uses an unwinding mechanism to unwind electrode sheets, a laser cutting mechanism to simultaneously laser-cut electrode tabs on the electrode sheets, and then a feeding roller to feed the sheets into a feeding mechanism, which in turn feeds them into a winding mechanism for winding. The winding mechanism has multiple winding stations, enabling continuous winding of the electrode sheets and diaphragms. The feeding roller can roll and clamp the electrode sheets, unidirectionally conveying them towards the feeding mechanism. Simultaneously, it continuously conveys the electrode sheets to the feeding mechanism when the winding mechanism changes stations, preventing the electrode sheets from retracting and achieving uniform electrode sheet conveying. Compared to existing technologies, this invention uses the feeding roller to roll and clamp the electrode sheets unidirectionally, preventing retraction and ensuring continuous electrode sheet conveying when the winding mechanism changes stations. This achieves continuous, stable, and uniform electrode sheet conveying without changing the winding speed or stopping the machine for rewinding, ensuring continuous winding of the diaphragm electrode sheets, eliminating auxiliary time, and allowing all mechanisms to operate synchronously without individual start / stop, thus improving the overall production efficiency of the machine. Furthermore, this invention eliminates the need for a buffer mechanism, avoiding problems such as tab bending and tab misalignment, thus improving winding quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a cutting and rolling integrated machine in the prior art;

[0020] Figure 2 This is a schematic diagram of the overall structure of the slitting and rolling machine provided in an embodiment of the present invention;

[0021] Figure 3 A partial structural schematic diagram of the slitting and rolling machine provided in an embodiment of the present invention;

[0022] Figure 4 for Figure 3 A schematic diagram of the winding mechanism.

[0023] Icons: 100-Cut and roll integrated machine; 110-Unwinding mechanism; 120-Feeding clamping roller; 121-Clamping roller bracket; 123-First unidirectional clamping roller; 125-Second unidirectional clamping roller; 130-Feeding mechanism; 131-Electrode cutter; 133-Feeding clamping roller; 140-Laser cutting mechanism; 141-Laser generator; 150-Winding mechanism; 151-Winding disc; 152-Winding needle; 153-Diaphragm cutter; 154-Diaphragm pressing assembly; 155-Cutter drive; 156-Cutting blade; 157-Rotating roller; 158-Diaphragm pressure roller; 159-Pressing drive; 160-Clamping plate; 200-Electrode; 300-Diaphragm. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0026] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0027] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, 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, and therefore should not be construed as a limitation of this invention.

[0028] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0029] As disclosed in the background section, existing integrated cutting and winding machines typically employ a large buffer mechanism to store the cut electrode sheets in order to prevent the cutting section speed from being too fast and causing the electrode sheet to break and stop the machine. The cutting speed is adjusted to follow the speed of the winding section to avoid stopping the machine and affecting efficiency. However, due to excessive roller passing, the buffer mechanism is prone to problems such as excessive electrode sheet wrap angle, causing electrode tab folding and electrode tab misalignment, which affects the core quality.

[0030] Furthermore, most existing winding machines use the method of changing the winding speed to achieve roll changing. This method has many problems. For example, the switching of actions results in frequent acceleration and deceleration, as well as the waiting of the electrode sheet, which leads to a long auxiliary time and cannot further improve efficiency. Secondly, when the disc structure of the mechanism changes positions, other auxiliary actions cannot be synchronized. Each action needs to be started and stopped separately. Frequent acceleration and deceleration make it difficult to control the tension and cause large fluctuations. The electrode sheet and diaphragm are prone to deviation, which affects the core alignment deviation and the wrinkling of the inner ring of the cell.

[0031] like Figure 1The diagram shows the structure of a traditional slitting and winding machine, including an unwinding section, a cutting section, a sheet feeding section, and a winding head. In actual operation, the electrode sheets in the unwinding area pass through the cutting station and are then stored in the buffer mechanism. During high-speed winding, the electrode sheets in the buffer mechanism are consumed. Because the buffer mechanism has many rollers, the wrap angle between the rollers and the electrode sheets is large, easily causing electrode misalignment and electrode tab folding. Furthermore, in traditional slitting and winding machines, the electrode sheets are stationary during the winding section due to station changes, threading needles, needle misalignment, and pre-winding of the diaphragm, while the cutting section continues cutting and conveying the belt, storing the electrode sheets in the buffer mechanism. When the winding section enters high-speed winding, the buffered electrode sheets are consumed, completing one cycle. This results in excessively long auxiliary times, and each action requires separate start and stop, frequent acceleration and deceleration, leading to poor tension control, large fluctuations, and easy misalignment of the electrode sheets and diaphragm, thus affecting core alignment deviations and causing wrinkling of the inner ring of the cell.

[0032] To address the problems associated with traditional integrated cutting and rolling machines, this invention provides a novel integrated cutting and rolling machine. It should be noted that, unless otherwise specified, the features in the embodiments of this invention can be combined with each other. Specific Implementation

[0034] Please see Figures 2 to 4 This embodiment provides a cutting and winding integrated machine 100, which can avoid machine downtime, ensure continuous winding of diaphragm 300 and electrode sheet 200, eliminate auxiliary time, and synchronize the operation of each mechanism to avoid individual start and stop, thereby improving the overall production efficiency of the machine. At the same time, the buffer mechanism is eliminated to avoid problems such as electrode tab folding and electrode tab deviation, thereby improving the winding quality.

[0035] The slitting and winding machine 100 provided in this embodiment includes an unwinding mechanism 110, a feeding clamping roller 120, a feeding mechanism 130, a laser cutting mechanism 140, and a winding mechanism 150. The unwinding mechanism 110 is used to unwind the electrode sheet 200. The feeding mechanism 130 is located on the feeding side of the winding mechanism 150 and is used to feed the electrode sheet 200 into the winding mechanism 150. The feeding clamping roller 120 is located on the feeding side of the feeding mechanism 130 and is used to roll and clamp the electrode sheet 200 towards the feeding mechanism 150. The feeding mechanism 130 unidirectionally conveys the electrode sheet 200. The laser cutting mechanism 140 is located between the unwinding mechanism 110 and the feeding clamp roller 120 for synchronous laser cutting of the electrode sheet 200. The winding mechanism 150 has multiple winding stations for continuous winding of the electrode sheet 200 and the diaphragm 300. The feeding clamp roller 120 is also used to continuously convey the electrode sheet 200 to the feeding mechanism 130 when the winding mechanism 150 changes stations and to prevent the electrode sheet 200 from retracting.

[0036] In this embodiment, the unwinding mechanism 110, the feeding clamping roller 120, the feeding mechanism 130, the laser cutting mechanism 140, and the winding mechanism 150 are all mounted on a mounting plate, and several rollers are arranged between each mechanism to realize the turning and conveying of the electrode sheet 200.

[0037] It should be noted that in actual operation, the electrode tabs of the electrode 200 are simultaneously laser-cut using the laser cutting mechanism 140, and then fed into the feeding mechanism 130 by the feeding clamp roller 120. The feeding mechanism 130 then feeds the electrode into the winding mechanism 150 for winding. The winding mechanism 150 has multiple winding stations, which can realize the continuous winding of the electrode 200 and the diaphragm 300. The feeding clamp roller 120 can roll and clamp the electrode 200 and unidirectionally convey the electrode 200 towards the feeding mechanism 130. At the same time, when the winding mechanism 150 changes stations, it continuously conveys the electrode 200 to the feeding mechanism 130 to prevent the electrode 200 from retreating, thus realizing the uniform speed conveying of the electrode 200. In this embodiment, the feeding clamping roller 120 serves to roll and clamp the unidirectionally conveyed electrode sheet 200. This prevents the electrode sheet 200 from retracting during station changes in the winding mechanism and ensures continuous feeding. The electrode sheet 200 is fed into the winding needle 152 and carried into the winding core by the diaphragm 300. Throughout the process, the electrode sheet 200 and diaphragm 300 operate without interruption, achieving continuous, stable, and uniform feeding of the electrode sheet 200. Furthermore, it eliminates the need to change the winding speed or stop the machine for rewinding, ensuring continuous winding of the diaphragm 300 and electrode sheet 200. This eliminates auxiliary time, allows all mechanisms to operate synchronously without individual start-stop cycles, and improves overall machine production efficiency. Moreover, this embodiment eliminates the buffer mechanism, avoiding problems such as electrode tab kinking and deviation, thus improving winding quality.

[0038] It is worth noting that in this embodiment, both the diaphragm 300 and the electrode 200 move at a constant speed. The cutting speed of the laser cutting mechanism 140 is matched with the winding speed of the winding mechanism 150, ensuring continuous conveying. During the change of station in the winding mechanism 150, the electrode 200 is fed into a new winding needle 152 by the feeding clamp roller 120, and the diaphragm 300 carries the core in, so that neither the electrode 200 nor the diaphragm 300 needs to stop, achieving continuous, stable, and uniform conveying of the electrode 200.

[0039] It should also be noted that the slitting and winding machine 100 in this embodiment also includes a mechanism for unwinding and feeding the diaphragm 300 (not shown in the figure), which can be referred to in the existing slitting and winding machine. Furthermore, in this embodiment, the unwinding mechanism 110, the laser cutting mechanism 140, the sheet feeding clamping roller 120, and the feeding mechanism 130 are all in two sets, which can respectively realize the unwinding, cutting, and feeding of the positive electrode sheet 200 and the negative electrode sheet 200. This embodiment uses one set as an example for explanation.

[0040] The feeding clamping roller 120 includes a clamping roller bracket 121, a first unidirectional clamping roller 123, and a second unidirectional clamping roller 125. The clamping roller bracket 121 is disposed on the feeding side of the feeding mechanism 130. The first unidirectional clamping roller 123 and the second unidirectional clamping roller 125 are rotatably disposed on the clamping roller bracket 121, forming a unidirectional clamping channel for the electrode sheet 200 to pass through. Both the first unidirectional clamping roller 123 and the second unidirectional clamping roller 125 rotate in one direction, used to unidirectionally convey the electrode sheet 200 toward the feeding mechanism 130. Specifically, the first unidirectional clamping roller 123 and the second unidirectional clamping roller 125 abut against both sides of the electrode sheet 200, enabling continuous conveying of the electrode sheet 200 toward the feeding mechanism 130. Furthermore, since both the first unidirectional clamping roller 123 and the second unidirectional clamping roller 125 are unidirectional rotating rollers, the electrode sheet 200 can be prevented from retracting when changing positions.

[0041] Furthermore, the feeding clamping roller 120 also includes a feeding drive component, which is connected to the first unidirectional clamping roller 123 and / or the second unidirectional clamping roller 125 for driving the first unidirectional clamping roller 123 and / or the second unidirectional clamping roller 125 to rotate in one direction. Preferably, the feeding drive component can be a servo motor, and it can simultaneously drive the first unidirectional clamping roller 123 and the second unidirectional clamping roller 125 to rotate in opposite directions, so as to synchronously push the electrode sheet 200 toward the feeding mechanism 130 and the winding needle 152 for feeding. Of course, the feeding drive component can also drive only the first unidirectional clamping roller 123 or the second unidirectional clamping roller 125 to rotate, so that one of the first unidirectional clamping roller 123 and the second unidirectional clamping roller 125 is a driving roller and the other is a driven roller.

[0042] In this embodiment, a clamping plate 160 is also provided on the discharge side of the unidirectional clamping channel. The clamping plate 160 is located on the infeed side of the feeding mechanism 130 and is used to guide the electrode 200 and guide the electrode 200 into the feeding mechanism 130. Specifically, the clamping plate 160 is provided on both sides of the electrode 200, which can achieve the function of clamping and guiding, ensuring that the electrode 200 smoothly enters the feeding mechanism 130.

[0043] The feeding mechanism 130 includes an electrode cutter 131 and a feeding clamping roller 133. The electrode cutter 131 is disposed between the feeding clamping roller 120 and the winding mechanism 150, and is used to follow up on the cutting of the electrode 200. The feeding clamping roller 133 is disposed between the electrode cutter 131 and the winding mechanism 150, and is used to roll and clamp the electrode 200 and feed the electrode 200 into the winding mechanism 150. Specifically, the electrode cutter 131 is disposed between the feeding clamping roller 133 and the clamping plate 160, and can realize the following cutting of the electrode 200. Specifically, it can be driven by a cylinder or servo cylinder or other driving component to move synchronously with the electrode 200 and realize the following cutting. For the specific principle, refer to the existing electrode 200 following cutting mechanism.

[0044] The winding mechanism 150 includes a winding reel 151, a plurality of winding needles 152, a diaphragm cutter 153, and a diaphragm pressing assembly 154. The plurality of winding needles 152 are rotatably mounted on the winding reel 151, forming a plurality of winding stations. The winding reel 151 is rotatably mounted on a mounting plate to allow for switching between winding stations. The diaphragm cutter 153 is movably mounted on one side near the winding station of the feeding mechanism 130, for moving closer to or away from the winding station, and for cutting the diaphragm 300. The diaphragm pressing assembly 154 is movably mounted on one side near the winding station of the feeding mechanism 130, for pressing onto the winding needles 152 so that the diaphragm 300 adheres to the winding needles 152.

[0045] In this embodiment, the winding reel 151 is rotatably mounted on the mounting plate and can switch winding positions by rotation. Preferably, in this embodiment, three winding needles 152 are evenly distributed on the winding reel 151, and the three winding needles 152 can switch positions under the drive of the winding reel 151. The diaphragm cutter 153 can cut the diaphragm 300 during the uniform movement of the diaphragm 300, thereby ensuring the uniform conveying of the diaphragm 300 and the electrode 200.

[0046] The diaphragm cutter 153 includes a cutter drive 155, a cutting blade 156, and a rotating roller 157. The rotating roller 157 is rotatably disposed at one end of the cutter drive 155 and can move closer to or further away from the winding needle 152 under the drive of the cutter drive 155. The cutting blade 156 is disposed on the rotating roller 157 and is used to cut the diaphragm 300 when the surface linear velocity of the rotating roller 157 is the same as the linear velocity of the diaphragm 300, so as to achieve continuous operation of the diaphragm 300.

[0047] The diaphragm pressing assembly 154 includes a diaphragm pressing roller 158 and a pressing drive 159. The diaphragm pressing roller 158 is rotatably disposed at one end of the pressing drive 159 and can move closer to or away from the winding needle 152 under the drive of the pressing drive 159. The diaphragm pressing roller 158 is used to roll and press onto the winding needle 152.

[0048] In this embodiment, both the pressing drive 159 and the cutting drive 155 are cylinders, hydraulic cylinders, or servo cylinders, which can drive the diaphragm pressure roller 158 and the rotating roller 157 to perform linear reciprocating motion, respectively. At the start of winding, the pressing drive 159 drives the diaphragm pressure roller 158 close to the corresponding winding needle 152, causing the diaphragm 300 to adhere to the winding needle 152 and continue winding. The electrode sheet 200 is also wound under the drive of the diaphragm 300. After the core on the winding needle 152 reaches the preset size, the winding disc 151 begins to rotate. Simultaneously, the cutting drive 155 drives the rotating roller 157 to rotate and approach the winding needle 152. When the surface linear velocity of the rotating roller 157 is the same as the linear velocity of the diaphragm 300, the diaphragm 300 is cut. The front and rear sections of the diaphragm 300 enter the next station with the previous winding needle 152, while the rear section of the diaphragm 300 adheres to the surface of the next winding needle 152 to complete a new winding. Electrode 200 is fed into winding needle 152 by feeding clamp roller 120. Simultaneously, the laser cutting section speed follows the winding section speed. Electrode 200 is carried into the winding core by diaphragm 300, and then diaphragm 300 and electrode 200 are wound together. Feed clamp roller 120 is a unidirectional roller, rotating only in the winding direction of electrode 200 to prevent electrode 200 from reversing. Near the end, electrode 200 is cut by electrode 200 flying cutter. The cut electrode 200 follows winding reel 151 to change stations and enters the next station change cycle.

[0049] In this embodiment, the laser cutting mechanism 140 includes at least one laser generator 141, which is disposed between the unwinding mechanism 110 and the feeding clamping roller 120, and is positioned on one side of the electrode 200 for synchronous laser cutting of the electrode 200. Specifically, the laser cutting mechanism 140 preferably includes three laser generators 141, each with a cutting head at its end, enabling multi-station laser cutting and further improving the laser cutting speed. Of course, the laser cutting mechanism 140 may also include a single laser cutter or two laser cutters to achieve single-station or dual-station laser cutting; the number of laser generators 141 and laser cutting stations is not limited here.

[0050] This embodiment provides an integrated cutting and winding machine, which feeds the electrode sheet 200 into the winding needle 152 by adding a feeding clamping roller 120, and then carries the core into the winding by the diaphragm 300. The entire process is uninterrupted for the electrode sheet 200 and the diaphragm 300, and the buffer mechanism between the laser cutting and winding stations is eliminated. The laser cutting section moves the belt at a constant speed, with no interruptions or frequent accelerations. The specific principle is explained as follows: At the beginning of the winding section, the winding disc 151 rotates when changing stations. At the same time as changing stations, the winding needle 152 rotates. When the diaphragm 300 contacts the winding needle 152, the diaphragm pressure roller 158 presses down on the diaphragm 300, and the diaphragm cutter 153 rotates synchronously with the winding needle 152, cutting the diaphragm 300. Electrode 200 is fed into winding needle 152 by feeding clamp roller 120. Simultaneously, the laser cutting section follows the winding section's speed, and electrode 200 is carried into the winding core through diaphragm 300. Then, diaphragm 300 and electrode 200 are wound together. Feeding clamp roller 120 is a unidirectional roller structure, rotating only in the winding direction of electrode 200 to prevent electrode 200 from reversing. Near the end, electrode 200 is cut by electrode cutter 131. After cutting, electrode 200 follows winding reel 151 to change stations and enters the next station change cycle. Throughout the entire process, the electrode 200's path does not stop, and the cutting speed of the laser cutting station can be synchronized with the winding section's speed. No buffer storage is required, and the speed of the winding section can still be matched. This reduces the number of rollers that the electrode 200 passes through, preventing the electrode 200 from running off-center and the electrode tabs from folding. Furthermore, the winding section uses a continuous winding method with a diaphragm 300 and electrode 200, saving auxiliary time and greatly improving production efficiency and cell quality.

[0051] It should be noted that the integrated cutting and winding machine 100 mentioned in this embodiment can also be applied to a single winding machine, that is, laser cutting is cancelled and only winding is performed. Similarly, the additional feeding clamping roller 120 plays the role of rolling and clamping the unidirectional conveying electrode 200. When the winding mechanism changes positions, it can prevent the electrode 200 from moving backward and ensure the continuous conveying of the electrode 200, thus realizing the continuous, stable and uniform conveying of the electrode 200.

[0052] In summary, the integrated cutting and winding machine 100 provided in this embodiment unwinds the electrode sheet 200 through the unwinding mechanism 110, performs synchronous laser cutting of the electrode tabs on the electrode sheet 200 using the laser cutting mechanism 140, and then feeds it into the feeding mechanism 130 by the feeding clamp roller 120, and then feeds it into the winding mechanism 150 for winding. The winding mechanism 150 has multiple winding stations, which can realize continuous winding of the electrode sheet 200 and the diaphragm 300. The feeding clamp roller 120 can roll and clamp the electrode sheet 200 and unidirectionally convey the electrode sheet 200 towards the feeding mechanism 130. At the same time, when the winding mechanism 150 changes stations, it continuously conveys the electrode sheet 200 to the feeding mechanism 130 to prevent the electrode sheet 200 from retreating, thus realizing uniform speed conveying of the electrode sheet 200. Compared to existing technologies, this embodiment utilizes the feeding clamping roller 120 to unidirectionally transport the electrode sheet 200, preventing it from retracting during station changes in the winding mechanism and ensuring continuous transport. This achieves continuous, stable, and uniform transport of the electrode sheet 200 without requiring changes to the winding speed or machine stops for rewinding, ensuring continuous winding of the diaphragm 300 and electrode sheet 200. It eliminates auxiliary time, allows all mechanisms to operate synchronously without individual start-stop cycles, and improves overall machine efficiency. Furthermore, this invention eliminates the need for a buffer mechanism, preventing issues such as electrode tab kinking and deviation, thus improving winding quality.

[0053] 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 cutting and rolling integrated machine, characterized in that, The device includes an unwinding mechanism, a feeding clamping roller, a feeding mechanism, a laser cutting mechanism, and a winding mechanism. The unwinding mechanism is used to unwind the electrode sheet. The feeding mechanism is located on the feeding side of the winding mechanism and is used to feed the electrode sheet into the winding mechanism. The feeding clamping roller is located on the feeding side of the feeding mechanism and is used to roll and clamp the electrode sheet and unidirectionally convey the electrode sheet towards the feeding mechanism. The laser cutting mechanism is located between the unwinding mechanism and the feeding clamping roller and is used to perform synchronous laser cutting on the electrode sheet. The winding mechanism has multiple winding stations to realize continuous winding of the electrode sheet and the diaphragm. The feeding clamping roller is also used to continuously convey the electrode sheet to the feeding mechanism when the winding mechanism changes stations and to prevent the electrode sheet from retracting. The feeding clamping roller includes a clamping roller bracket, a first unidirectional clamping roller, and a second unidirectional clamping roller. The clamping roller bracket is disposed on the feeding side of the feeding mechanism. The first unidirectional clamping roller and the second unidirectional clamping roller are rotatably disposed on the clamping roller bracket and form a unidirectional clamping channel for the electrode sheet to pass through. The first unidirectional clamping roller and the second unidirectional clamping roller are both unidirectionally rotating and respectively abut against both sides of the electrode sheet for unidirectionally conveying the electrode sheet toward the feeding mechanism. The winding mechanism includes a winding reel, multiple winding needles, and a diaphragm cutter. The multiple winding needles are rotatably mounted on the winding reel and form multiple winding stations. The winding reel is rotatably mounted on a mounting plate to rotate and switch the winding stations. The diaphragm cutter is movably mounted on one side of the winding station near the feeding mechanism to move closer to or away from the winding station and to cut the diaphragm. The winding mechanism further includes a diaphragm pressing assembly, which is movably disposed on one side of the winding station near the feeding mechanism, for pressing onto the winding needle so that the diaphragm adheres to the winding needle; The feeding clamping roller also includes a feeding drive component, which is connected to the first unidirectional clamping roller and / or the second unidirectional clamping roller for driving the first unidirectional clamping roller and / or the second unidirectional clamping roller to rotate in one direction. The diaphragm cutter includes a cutter drive, a cutting blade, and a rotating roller. The rotating roller is rotatably disposed at one end of the cutter drive and can move closer to or away from the winding needle under the drive of the cutter drive. The cutting blade is disposed on the rotating roller and is used to cut the diaphragm when the surface linear velocity of the rotating roller is the same as the linear velocity of the diaphragm. The diaphragm pressing assembly includes a diaphragm pressing roller and a pressing drive. The diaphragm pressing roller is rotatably disposed at one end of the pressing drive and can move closer to or further away from the winding needle under the drive of the pressing drive. The diaphragm pressing roller is used to roll and press onto the winding needle.

2. The slitting and rolling machine according to claim 1, characterized in that, The discharge side of the unidirectional clamping channel is also provided with a clamping plate, which is located on the infeed side of the feeding mechanism and is used to guide the electrode sheet and guide the electrode sheet into the feeding mechanism.

3. The slitting and rolling machine according to claim 1, characterized in that, The feeding mechanism includes an electrode cutter and a feeding clamping roller. The electrode cutter is disposed between the feeding clamping roller and the winding mechanism for cutting the electrode. The feeding clamping roller is disposed between the electrode cutter and the winding mechanism for rolling and clamping the electrode and feeding the electrode into the winding mechanism.

4. The slitting and rolling machine according to claim 1, characterized in that, The laser cutting mechanism includes at least one laser generator, which is disposed between the unwinding mechanism and the feeding clamping roller, and is used to be positioned on one side of the electrode sheet for synchronous laser cutting of the electrode sheet.

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