Laser Winding Machine

Abstract

The embodiment of the present invention provides a laser winding machine, which relates to the field of battery manufacturing technology. The laser winding machine integrates the pole piece unwinding mechanism, the laser cutting mechanism and the conveying direction of the battery cell winding mechanism to install the pole piece on the installation plate in sequence, and highly integrates the pole ear cutting process and the battery cell winding process to achieve equipment integration, reduce the material roll buffer between the pole ear forming and the battery cell winding, and the work and loss of loading and unloading materials, reduce the damage to the pole piece, and improve the quality of the battery cell; at the same time, the pole piece and the diaphragm are wound to form a wound battery cell, and after the pole ear is cut and formed, the battery cell winding process is directly carried out, the equipment is integrated, the separate process equipment is reduced, and the efficiency is improved. At the same time, the position of the pole ear on the wound battery cell is detected by the pole ear alignment detection mechanism, which can realize the closed-loop control of the pole ear position, reduce the misalignment of the pole ear, and improve the quality of the battery cell.

Description

Technical Field

[0001] The present invention relates to the technical field of battery manufacturing, and in particular to a laser winding all-in-one machine. Background Art

[0002] At present, in the production process of power lithium batteries, cell winding is one of the most important processes in the battery production process. In the production process of multi-electrode cell, the cutting and forming of the lugs is an indispensable process. The laser cutting lug forming process is carried out separately from the winding. The production mode with separate processes cannot achieve a closed loop of the misalignment of the lugs of the wound and formed cells and the control of the lug cutting spacing. During the production process, the defective rate of the cells due to the misalignment of the lugs accounts for a large proportion. In addition, the production mode in which the laser cutting lug forming process is separated from the winding process requires the placement of equipment in the factory, the addition of special equipment startup personnel, etc., which requires the investment of more manpower and material resources, and the process loss is relatively large. Summary of the invention

[0003] The objectives of the present invention include, for example, providing a laser winding all-in-one machine, which can highly integrate the pole ear cutting process and the battery cell winding process, realize equipment integration, reduce the material roll buffer between the pole ear forming knife and the battery cell winding, as well as the work and loss of loading and unloading materials, reduce the equipment of separate processes, improve work efficiency, reduce damage to the pole piece, and can realize closed-loop control of pole ear cutting, reduce the misalignment of the pole ear, and improve the quality of the battery cell.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In the first aspect, the present invention provides a laser winding all-in-one machine, including a mounting plate, a pole piece unwinding mechanism, a diaphragm unwinding mechanism, a laser cutting mechanism, a battery cell winding mechanism and a pole ear alignment detection mechanism. The pole piece unwinding mechanism, the laser cutting mechanism and the battery cell winding mechanism are integrated and arranged on the mounting plate in sequence according to the conveying direction of the pole piece. The pole piece unwinding mechanism is used to unwind the pole piece. The laser cutting mechanism is used to cut and form pole ears on the pole piece. The diaphragm unwinding mechanism is arranged on the feeding side of the battery cell winding mechanism for unwinding the diaphragm. The battery cell winding mechanism is used to wind the pole piece and the diaphragm and form a wound battery cell. The pole ear alignment detection mechanism is arranged adjacent to the battery cell winding mechanism for performing position detection on the pole ears on the wound battery cell on the battery cell winding mechanism, and the pole ear alignment detection mechanism is electrically connected to the laser cutting mechanism and the battery cell winding mechanism to realize closed-loop control of the pole ear position.

[0006] In an optional embodiment, the pole lug alignment detection mechanism includes an alignment control module and a parameter detection module. The alignment control module is arranged on the mounting plate and has built-in standard parameters of the wound battery cells. The parameter detection module is arranged on the battery cell winding mechanism and is electrically connected to the alignment control module for collecting actual parameters of the wound battery cells. The alignment control module is used to compare the actual parameters with the standard parameters and generate the misalignment amount of the wound battery cells. The laser cutting mechanism and the battery cell winding mechanism adjust the position of the pole lug.

[0007] In an optional embodiment, the laser winding machine also includes a diaphragm incoming material detection mechanism and a pole piece incoming material detection mechanism. The diaphragm incoming material detection mechanism is arranged on the mounting plate and located on the discharge side of the diaphragm unwinding mechanism, and is used to detect the incoming material quality of the diaphragm. The pole piece incoming material detection mechanism is arranged on the mounting plate and located on the discharge side of the pole piece unwinding mechanism, and is used to detect the incoming material quality of the pole piece. The battery cell winding mechanism is electrically connected to the diaphragm incoming material detection mechanism and the pole piece incoming material mechanism at the same time, and is used to adjust the winding speed, winding acceleration and winding tension according to the incoming material quality of the pole piece and the diaphragm.

[0008] In an optional embodiment, the laser winding machine also includes a diaphragm correction mechanism and a pole piece correction mechanism. The diaphragm correction mechanism is arranged on the mounting plate and located on the discharge side of the diaphragm unwinding mechanism. The pole piece correction mechanism is arranged on the mounting plate and located on the discharge side of the pole piece unwinding mechanism. The diaphragm correction mechanism is electrically connected to the diaphragm incoming material detection mechanism for correcting the diaphragm according to the quality of the diaphragm incoming material. The pole piece correction mechanism is electrically connected to the pole piece incoming material monitoring mechanism for adjusting the correction speed of the pole piece according to the quality of the pole piece incoming material.

[0009] In an optional embodiment, the laser winding machine further includes a gluing mechanism, which is disposed on the mounting plate and adjacent to the winding mechanism, and is used to glue the wound battery cells.

[0010] In an optional embodiment, the gluing mechanism includes a glue sandwich assembly, a rubber roller arm and a glue roller. The glue roller is rotatably disposed at one end of the rubber roller arm, and the other end of the rubber roller arm is rotatably disposed on a mounting plate. The glue roller rotates relative to the mounting plate driven by the rubber roller seat to approach or move away from the winding mechanism. The glue sandwich assembly is rotatably disposed at the end of the rubber roller arm, and the rotation center of the glue sandwich assembly coincides with the rotation center of the glue roller, so as to stick the adhesive tape on the glue roller.

[0011] In an optional embodiment, a rubber roller shaft is provided at one end of the rubber roller arm away from the rubber roller, and the rubber roller shaft is rotatably provided on the mounting plate. The rubber roller arm is connected to the rubber roller shaft so that the rubber roller arm can rotate driven by the rubber roller shaft. A first rotating shaft is rotatably mounted outside the rubber roller shaft, and the first rotating shaft is transmission connected to the rubber roller through a first belt, which is used to drive the rubber roller to rotate. A second rotating shaft is rotatably mounted outside the first rotating shaft, and the second rotating shaft is transmission connected to the rubber clamping assembly through a second belt, which is used to drive the rubber clamping assembly to rotate.

[0012] In an optional embodiment, a first rolling bearing is arranged between the first rotating shaft and the rubber roller rotating shaft so that the first rotating shaft and the rubber roller rotating shaft can rotate independently of each other, and a second rolling bearing is arranged between the second rotating shaft and the first rotating shaft so that the second rotating shaft and the first rotating shaft can rotate independently of each other.

[0013] In an optional embodiment, the battery cell winding mechanism includes a winding fixed seat, a station change turntable and a plurality of winding needles. The winding fixed seat is arranged on a mounting plate, the station change turntable is rotatably arranged on the winding fixed seat and has a plurality of stations. The plurality of winding needles are arranged on the station change turntable at intervals and switch between the plurality of stations under the drive of the station change turntable.

[0014] In an optional embodiment, the laser cutting mechanism includes a laser mount, a laser cutter, a laser cutting roller and a dust suction structure. The laser mount is disposed on a mounting plate, the laser cutting roller is rotatably disposed on the laser mount for conveying the pole piece, the laser cutter is disposed on the laser mount and is used to cut the pole piece to form a pole ear, and the dust suction structure is disposed at the lower part of the laser mount and is located below the laser cutting roller for receiving and sucking away the dust generated by the cutting.

[0015] The beneficial effects of the embodiments of the present invention include, for example:

[0016] The present invention provides a method for sequentially integrating the pole piece unwinding mechanism, the laser cutting mechanism and the battery cell winding mechanism to install the pole piece in the conveying direction on the mounting plate, highly integrating the pole ear cutting process and the battery cell winding process, realizing equipment integration, reducing the material roll buffering and the work and loss of loading and unloading between the pole ear forming and the battery cell winding, reducing the damage to the pole piece, and improving the battery cell quality; at the same time, the pole piece and the diaphragm are wound to form a wound battery cell, and after the pole ear is cut and formed, the battery cell winding process is directly carried out, the equipment is integrated, the separate process equipment is reduced, and the efficiency is improved. At the same time, the pole ear alignment detection mechanism is used to detect the position of the pole ear on the wound battery cell, which can realize closed-loop control of the pole ear position, reduce the misalignment of the pole ear, and improve the battery cell quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A schematic diagram of the structure of a laser winding machine provided in an embodiment of the present invention;

[0019] Figure 2 for Figure 1 A schematic diagram of the structure of the middle tab alignment detection mechanism;

[0020] Figure 3 for Figure 1 Structural diagram of the middle glue sticking mechanism;

[0021] Figure 4 for Figure 3 Schematic diagram of the connection structure of the middle rubber roller shaft;

[0022] Figure 5 for Figure 1 Structural diagram of the laser cutting mechanism;

[0023] Figure 6 for Figure 1 Schematic diagram of the structure of the winding mechanism of the battery cell.

[0024] Icons: 100-laser winding machine; 110-mounting plate; 120-electrode unwinding mechanism; 130-diaphragm unwinding mechanism; 140-laser cutting mechanism; 141-laser mounting seat; 143-laser cutter; 145-laser cutting roller; 147-dust suction structure; 150-cell winding mechanism; 151-winding fixed seat; 153-station change turntable; 155-winding needle; 160-electrode ear alignment detection mechanism; 161-alignment control Module; 163-parameter detection module; 170a-diaphragm incoming material detection mechanism; 170b-pole piece incoming material detection mechanism; 180a-diaphragm correction mechanism; 180b-pole piece correction mechanism; 190-glueing mechanism; 191-glue clamping assembly; 193-rubber roller arm; 1931-rubber roller shaft; 1933-first rotating shaft; 1935-second rotating shaft; 1937-first rolling bearing; 1939-second rolling bearing; 195-rubber roller. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0030] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0031] First embodiment

[0032] See also Figures 1 to 6 This embodiment provides a laser winding machine 100, which highly integrates the tab cutting process and the cell winding process to achieve equipment integration, reduce the material roll buffering and loading and unloading work and loss between the tab forming and the cell winding, reduce the damage to the pole piece, and improve the quality of the cell; at the same time, the pole piece and the diaphragm are wound to form a wound cell, and the cell winding process is directly carried out after the tab is cut and formed, the equipment is integrated, the separate process equipment is reduced, and the efficiency is improved. At the same time, the tab alignment detection mechanism 160 detects the position of the tab on the wound cell, which can realize closed-loop control of the tab position, reduce the misalignment of the tab, and improve the quality of the cell.

[0033] The laser winding machine 100 provided in this embodiment includes a mounting plate 110, a pole piece unwinding mechanism 120, a diaphragm unwinding mechanism 130, a laser cutting mechanism 140, a battery cell winding mechanism 150 and a pole ear alignment detection mechanism 160. The pole piece unwinding mechanism 120, the laser cutting mechanism 140 and the battery cell winding mechanism 150 are sequentially integrated on the mounting plate 110 according to the conveying direction of the pole piece. The pole piece unwinding mechanism 120 is used to unwind the pole piece, and the laser cutting mechanism 140 is used to cut and form on the pole piece. The pole tab and diaphragm unwinding mechanism 130 is arranged on the feeding side of the battery cell winding mechanism 150, and is used for unwinding the diaphragm. The battery cell winding mechanism 150 is used for winding the pole sheet and the diaphragm to form a wound battery cell. The pole tab alignment detection mechanism 160 is arranged adjacent to the battery cell winding mechanism 150, and is used for detecting the position of the pole tab on the wound battery cell on the battery cell winding mechanism 150. The pole tab alignment detection mechanism 160 is electrically connected to the laser cutting mechanism 140 and the battery cell winding mechanism 150 to realize closed-loop control of the pole tab position.

[0034] In this embodiment, there are two electrode sheet unwinding mechanisms 120 and two diaphragm unwinding mechanisms 130, and the two electrode sheet unwinding mechanisms 120 are arranged on the left and right sides of the mounting plate 110, respectively for unwinding the positive electrode sheet and the negative electrode sheet. The two electrode sheet unwinding mechanisms 120 and the two diaphragm unwinding mechanisms 130 are arranged alternately, so as to form a battery cell with electrode sheets and diaphragms alternately stacked.

[0035] In this embodiment, the pole piece unwinding mechanism 120, the laser cutting mechanism 140 and the battery cell winding mechanism 150 are sequentially integrated on the mounting plate 110 in the direction of conveying the pole piece, and the pole ear cutting process and the battery cell winding process are highly integrated to achieve equipment integration, reduce the material roll buffering between the pole ear forming and the battery cell winding, and the work and loss of loading and unloading materials, reduce damage to the pole piece, and improve the quality of the battery cell; at the same time, the pole piece and the diaphragm are wound to form a wound battery cell, and after the pole ear is cut and formed, the battery cell winding process is directly carried out, the equipment is integrated, the separate process equipment is reduced, and the efficiency is improved. At the same time, the pole ear alignment detection mechanism 160 detects the position of the pole ear on the wound battery cell, which can realize closed-loop control of the pole ear position, reduce the misalignment of the pole ear, and improve the quality of the battery cell.

[0036] The pole lug alignment detection mechanism 160 includes an alignment control module 161 and a parameter detection module 163. The alignment control module 161 is arranged on the mounting plate 110 and has built-in standard parameters of the wound battery cells. The parameter detection module 163 is arranged on the battery cell winding mechanism 150 and is electrically connected to the alignment control module 161 for collecting actual parameters of the wound battery cells. The alignment control module 161 is used to compare the actual parameters with the standard parameters and generate the misalignment amount of the wound battery cells. The laser cutting mechanism 140 and the battery cell winding mechanism 150 adjust the position of the pole lug.

[0037] In this embodiment, the alignment control module 161 can be integrated on the central control machine of the entire system, and the parameter detection module 163 includes a plurality of parameter sensors. The parameter detection module 163 collects various parameters of the wound battery cell, such as using a CCD camera to collect image information, thereby detecting the position of the pole ear, detecting the thickness of the pole piece and the diaphragm through a thickness detection sensor, and detecting the displacement of the pole ear through a displacement sensor. The specific type of the parameter detection module 163 is not specifically limited here. Here, the actual parameters collected are compared with the standard parameters to obtain the misalignment amount. The laser cutting mechanism 140 and the battery winding mechanism 150 adjust the cutting position, running speed, etc. of the pole ear through the misalignment amount to achieve closed-loop control. For the specific process and implementation method of the closed-loop control, reference can be made to the existing closed-loop control technology.

[0038] It should be noted that the standard parameters in this embodiment refer to the parameters of a standard wound battery cell, which may be a calculated value or may be collected when the standard battery cell is wound.

[0039] In this embodiment, in order to solve the problems of difficult lug alignment, large alignment error and low quality rate under the multi-lug process of power batteries, the hardware design is carried out through model matching and selection of CCD cameras, thickness, displacement and other intelligent sensors, and the corresponding hardware mechanisms are configured to directly realize high-quality collection of real-time status data of the lugs, and develop corresponding intelligent algorithms. Starting from the establishment of an intelligent model, a reasonable mathematical model of the misalignment amount, encoder position and battery cell winding mechanism 150 position is constructed, and a key pair array of the encoder position and the winding motor position during lug sensing is obtained, so that the sampling data of high-quality battery cells is used as the standard template, and the data detected by the sensor during the production process is compared with the standard template battery cell, and the calculation of the independent lug misalignment amount is completed, thereby realizing online detection. Through factor separation, numerical detection, system verification, coefficient optimization, and orthogonal experiments, the influence of parameters such as unloading method / angle, winding speed, process pause, pole piece thickness, winding cell diameter, tension, cutting accuracy, etc. on the pole piece position accuracy is obtained, and a misalignment compensation model is established after parameter or hardware data changes. Through comprehensive system calculations, the laser cutting pole ear position and winding cell diameter are adjusted in real time to achieve a precision closed loop.

[0040] Furthermore, the laser winding machine 100 also includes a diaphragm incoming material detection mechanism 170a and a pole piece incoming material detection mechanism 170b. The diaphragm incoming material detection mechanism 170a is arranged on the mounting plate 110 and is located on the discharge side of the diaphragm unwinding mechanism 130, and is used to detect the incoming material quality of the diaphragm. The pole piece incoming material detection mechanism 170b is arranged on the mounting plate 110 and is located on the discharge side of the pole piece unwinding mechanism 120, and is used to detect the incoming material quality of the pole piece. The battery cell winding mechanism 150 is electrically connected to the diaphragm incoming material detection mechanism 170a and the pole piece incoming material mechanism at the same time, and is used to adjust the winding speed, winding acceleration and winding tension according to the incoming material quality of the pole piece and the diaphragm.

[0041] In this embodiment, the diaphragm incoming material detection mechanism 170a and the pole piece incoming material detection mechanism 170b can both collect parameters through different sensors, thereby obtaining parameters such as the edge shape, thickness, displacement of the pole piece and the diaphragm, and comparing them with the standard quantity, so that the quality of the incoming material can be judged according to the error. The specific technology of incoming material detection can also refer to the existing pole piece quality and diaphragm quality detection technology.

[0042] Furthermore, the laser winding machine 100 also includes a diaphragm correction mechanism 180a and a pole piece correction mechanism 180b. The diaphragm correction mechanism 180a is arranged on the mounting plate 110 and is located on the discharge side of the diaphragm unwinding mechanism 130. The pole piece correction mechanism 180b is arranged on the mounting plate 110 and is located on the discharge side of the pole piece unwinding mechanism 120. The diaphragm correction mechanism 180a is electrically connected to the diaphragm incoming material detection mechanism 170a, and is used to correct the diaphragm according to the quality of the diaphragm incoming material. The pole piece correction mechanism 180b is electrically connected to the pole piece incoming material monitoring mechanism, and is used to adjust the correction speed of the pole piece according to the quality of the pole piece incoming material, thereby realizing rapid correction of the pole piece.

[0043] In this embodiment, the random jitter and deviation of the pole piece / diaphragm during high-speed winding caused by the quality difference of the pole piece / diaphragm incoming materials (wavy edges, serpentine bends, uneven thickness) are studied. The wrinkles, deformation and material thickness during the winding process of the pole piece / diaphragm are taken as the research objects. The relationship between the pole piece thickness, wrinkle height and the position offset of the correction motor after unwinding and the output position offset of the correction sensor are obtained through the end face CCD, thickness measurement and distance sensor, and the empirical parameters are formed. The positions of the correction sensor and the correction motor when the current pole piece is walking are reversely analyzed to calculate the wrinkles. The height range is calculated, and the size range of the bending deformation of the pole piece is obtained through the data collected by the three deviation correction sensors on the end face of the material; at the same time, according to the test data, the influence of the pole piece wrinkle deformation, winding speed, main winding acceleration and deceleration, various levels of deviation correction speed, tension and other parameters on the pole piece jitter law, process deviation law and final quality of the battery cell is analyzed, and the corresponding deviation law is obtained, and the corresponding intelligent matching algorithm is optimized. Through the full closed-loop control, the winding speed, deviation correction mechanism, material tension and other parameters are optimized in real time to compensate for the random jitter and deviation of the pole piece caused by the wrinkle of the incoming material. Through the real-time monitoring of the incoming data of the pole ear and the multi-parameter collaborative closed-loop control technology, the pole piece can still have a high degree of alignment when wrinkles and thickness changes occur.

[0044] Furthermore, the laser winding machine 100 also includes a gluing mechanism 190, which is disposed on the mounting plate 110 and adjacent to the winding mechanism for gluing the wound battery cells.

[0045] The gluing mechanism 190 includes a glue clamping assembly 191, a rubber roller arm 193 and a glue roller 195. The glue roller 195 is rotatably disposed at one end of the rubber roller arm 193, and the other end of the rubber roller arm 193 is rotatably disposed on the mounting plate 110. The glue roller 195 rotates relative to the mounting plate 110 driven by the rubber roller seat to approach or move away from the winding mechanism. The glue clamping assembly 191 is rotatably disposed at the end of the rubber roller arm 193, and the rotation center of the glue clamping assembly 191 coincides with the rotation center of the glue roller 195, so as to stick the adhesive tape on the glue roller 195.

[0046] The glue clamping assembly 191 includes two glue clamping rollers, a glue clamping arm and a glue clamping shaft. The centers of the glue clamping shaft and the shaft of the glue sticking roller 195 overlap. One end of the glue clamping arm is connected to the glue clamping shaft, and the other end is connected to the two glue clamping rollers. The glue clamping arm rotates under the drive of the glue clamping shaft and drives the two glue clamping rollers to rotate. The two glue clamping rollers are used to clamp the adhesive tape and are located on the outer peripheral surface of the glue sticking roller 195. The adhesive tape is attached to the surface of the glue sticking roller 195 to complete the preparation of glue. For the specific structure of the glue clamping assembly 191, reference can be made to the existing glue clamping mechanism.

[0047] In this embodiment, a rubber roller shaft 1931 is provided at one end of the rubber roller arm 193 away from the rubber roller 195, and the rubber roller shaft 1931 is rotatably provided on the mounting plate 110. The rubber roller arm 193 is connected to the rubber roller shaft 1931 so that the rubber roller arm 193 can rotate under the drive of the rubber roller shaft 1931. A first rotating shaft 1933 is rotatably sleeved on the outside of the rubber roller shaft 1931. The first rotating shaft 1933 is transmission-connected to the rubber roller 195 through a first belt, and is used to drive the rubber roller 195 to rotate. A second rotating shaft 1935 is rotatably sleeved on the outside of the first rotating shaft 1933, and the second rotating shaft 1935 is transmission-connected to the glue clamping component 191 through a second belt, and is used to drive the glue clamping component 191 to rotate. Specifically, in this embodiment, the glue roller arm 193 adopts a rotary arm structure to drive the glue roller 195 to move closer to or away from the battery cell winding mechanism 150. Compared with the conventional cylinder linear propulsion structure, it greatly saves space, has a simple structure, and is easy to install.

[0048] In this embodiment, a first rolling bearing 1937 is provided between the first rotating shaft 1933 and the rubber roller rotating shaft 1931, so that the first rotating shaft 1933 and the rubber roller rotating shaft 1931 rotate independently of each other, and a second rolling bearing 1939 is provided between the second rotating shaft 1935 and the first rotating shaft 1933, so that the second rotating shaft 1935 and the first rotating shaft 1933 rotate independently of each other. Specifically, the rubber roller rotating shaft 1931, the first rotating shaft 1933 and the second rotating shaft 1935 are nested and connected by rolling bearings, so that the three sets of rotating systems are on the same axis but are independent of each other, which greatly saves the mechanism space and avoids mutual influence.

[0049] It should be noted that, in this embodiment, the first rotating roller, the second rotating roller and the rubber roller shaft 1931 rotate independently of each other and are driven by different power sources, thereby making the rotations of the rubber roller arm 193, the glue roller 195, and the glue clamping assembly 191 independent of each other, and providing better control flexibility.

[0050] The battery cell winding mechanism 150 includes a winding fixed seat 151, a station change turntable 153 and a plurality of winding needles 155. The winding fixed seat 151 is set on the mounting plate 110. The station change turntable 153 is rotatably set on the winding fixed seat 151 and has a plurality of stations. The plurality of winding needles 155 are arranged at intervals on the station change turntable 153 and switch between the plurality of stations under the drive of the station change turntable 153.

[0051] In this embodiment, the winding fixed seat 151 is fixedly set in the middle of the mounting plate 110, and the station change turntable 153 is rotatably set on the winding fixed seat 151 and has two stations. The winding needle 155 also corresponds to two. The two winding needles 155 switch between the two stations under the drive of the station change turntable 153, thereby realizing the winding action. And the battery cell winding mechanism 150 can realize the winding of the battery cell and the automatic conversion of different winding stations, and can realize the switching between constant angular velocity winding and constant linear velocity winding. According to the double-station or multi-station mechanism, a dual servo motor or multi-servo motor drive mechanism and corresponding 2 or more sets of winding needle 155 mechanisms are set. At the same time, a turret locking and positioning mechanism is configured after the station change.

[0052] The laser cutting mechanism 140 includes a laser mounting seat 141, a laser cutter 143, a laser cutting roller 145 and a dust suction structure 147. The laser mounting seat 141 is set on the mounting plate 110. The laser cutting roller 145 is rotatably set on the laser mounting seat 141 and is used to transport the pole piece. The laser cutter 143 is set on the laser mounting seat 141 and is used to cut the pole piece to form a pole ear. The dust suction structure 147 is set at the lower part of the laser mounting seat 141 and is located below the laser cutting roller 145. It is used to receive and suck away the dust generated by cutting.

[0053] In this embodiment, the laser cutting roller 145 is used to support the pole piece, and the laser cutter 143 corresponds to the edge of the pole piece, thereby cutting the edge of the pole piece to form a pole ear.

[0054] It should be noted that there is a cutting station on the laser mount 141, which is adjusted by a ball screw and a motor to achieve quantitative adjustment of the cutting width parameters. The pole piece is cut by laser, and the position of the pole ear is marked, and the dust generated by the cutting is removed in time. After cutting, the pole ear has an anti-folding structure to prevent the pole ear from colliding. At the same time, there is a waste collection system after laser cutting to ensure the stability of continuous production.

[0055] In summary, the laser winding machine 100 provided in this embodiment integrates the pole piece unwinding mechanism 120, the laser cutting mechanism 140 and the battery cell winding mechanism 150 in the conveying direction of the pole piece installation on the mounting plate 110 in sequence, and highly integrates the pole ear cutting process and the battery cell winding process to realize equipment integration, reduce the material roll buffer between the pole ear forming and the battery cell winding, and the work and loss of loading and unloading, reduce the damage to the pole piece, and improve the quality of the battery cell; at the same time, the pole piece and the diaphragm are wound to form a wound battery cell, and after the pole ear is cut and formed, the battery cell winding process is directly carried out, the equipment is integrated, and the single process equipment is reduced to improve efficiency. At the same time, the pole ear alignment detection mechanism 160 detects the position of the pole ear on the wound battery cell, which can realize the closed-loop control of the pole ear position, reduce the misalignment of the pole ear, and improve the quality of the battery cell. And through the real-time monitoring of the pole ear incoming data and the multi-parameter collaborative closed-loop control technology, the pole piece can still have a high degree of alignment when wrinkles and thickness changes occur. In addition, by adopting a new type of glue sticking structure, the overall space occupied is smaller and the glue sticking control is more flexible.

[0056] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A laser winding machine, characterized in that: It includes a mounting plate, a pole piece unwinding mechanism, a diaphragm unwinding mechanism, a laser cutting mechanism, a battery cell winding mechanism and a pole ear alignment detection mechanism. The pole piece unwinding mechanism, the laser cutting mechanism and the battery cell winding mechanism are sequentially integrated and arranged on the mounting plate according to the conveying direction of the pole piece. The pole piece unwinding mechanism is used to unwind the pole piece. The laser cutting mechanism is used to cut the pole piece to form the pole ear. The diaphragm unwinding mechanism is arranged on the feeding side of the battery cell winding mechanism and is used to unwind the diaphragm. The battery cell winding mechanism is used to wind the pole piece and the diaphragm and form a wound battery cell. The pole ear alignment detection mechanism is arranged adjacent to the battery cell winding mechanism and is used to detect the position of the pole ear on the wound battery cell on the battery cell winding mechanism. The pole ear alignment detection mechanism is electrically connected to the laser cutting mechanism and the battery cell winding mechanism to realize closed-loop control of the pole ear position. The lug alignment detection mechanism includes an alignment control module and a parameter detection module. The alignment control module is arranged on the mounting plate and has built-in standard parameters of the wound battery cell. The parameter detection module is arranged on the battery cell winding mechanism and is electrically connected to the alignment control module and is used to collect actual parameters of the wound battery cell. The alignment control module is used to compare the actual parameters with the standard parameters and generate the misalignment amount of the wound battery cell. The laser cutting mechanism and the battery cell winding mechanism adjust the position of the lug. The laser winding machine also includes a diaphragm incoming material detection mechanism and a pole piece incoming material detection mechanism. The diaphragm incoming material detection mechanism is arranged on the mounting plate and located on the discharging side of the diaphragm unwinding mechanism, and is used to detect the incoming material quality of the diaphragm. The pole piece incoming material detection mechanism is arranged on the mounting plate and located on the discharging side of the pole piece unwinding mechanism, and is used to detect the incoming material quality of the pole piece. The battery cell winding mechanism is electrically connected to the diaphragm incoming material detection mechanism and the pole piece incoming material mechanism at the same time, and is used to adjust the winding speed, winding acceleration and winding tension according to the incoming material quality of the pole piece and the diaphragm. The laser winding machine also includes a diaphragm deviation correction mechanism and a pole piece deviation correction mechanism. The diaphragm deviation correction mechanism is arranged on the mounting plate and located on the discharge side of the diaphragm unwinding mechanism. The pole piece deviation correction mechanism is arranged on the mounting plate and located on the discharge side of the pole piece unwinding mechanism. The diaphragm deviation correction mechanism is electrically connected to the diaphragm incoming material detection mechanism, and is used to correct the diaphragm according to the quality of the diaphragm incoming material. The pole piece deviation correction mechanism is electrically connected to the pole piece incoming material monitoring mechanism, and is used to adjust the deviation correction speed of the pole piece according to the quality of the pole piece incoming material. The laser winding machine also includes a glue sticking mechanism, which is arranged on the mounting plate and adjacent to the winding mechanism, and is used to glue the wound battery cell; The gluing mechanism includes a glue clamping assembly, a rubber roller arm and a glue sticking roller. The glue sticking roller is rotatably arranged at one end of the rubber roller arm, and the other end of the rubber roller arm is rotatably arranged on the mounting plate. The glue sticking roller rotates relative to the mounting plate under the drive of the rubber roller seat to approach or move away from the winding mechanism. The glue clamping assembly is rotatably arranged at the end of the rubber roller arm, and the rotation center of the glue clamping assembly coincides with the rotation center of the glue sticking roller, so as to stick the adhesive paper on the glue sticking roller. A rubber roller shaft is arranged at one end of the rubber roller arm away from the rubber roller, and the rubber roller shaft is rotatably arranged on the mounting plate, and the rubber roller arm is connected to the rubber roller shaft so that the rubber roller arm can rotate under the drive of the rubber roller shaft, and a first rotating shaft is rotatably sleeved outside the rubber roller shaft, and the first rotating shaft is transmission-connected to the rubber roller through a first belt, and is used to drive the rubber roller to rotate, and a second rotating shaft is rotatably sleeved outside the first rotating shaft, and the second rotating shaft is transmission-connected to the rubber clamping assembly through a second belt, and is used to drive the rubber clamping assembly to rotate; A first rolling bearing is arranged between the first rotating shaft and the rubber roller rotating shaft so that the first rotating shaft and the rubber roller rotating shaft can rotate independently of each other. A second rolling bearing is arranged between the second rotating shaft and the first rotating shaft so that the second rotating shaft and the first rotating shaft can rotate independently of each other.

2. The laser winding machine according to claim 1, characterized in that: The battery cell winding mechanism includes a winding fixed seat, a station change turntable and multiple winding needles. The winding fixed seat is set on the mounting plate. The station change turntable is rotatably set on the winding fixed seat and has multiple stations. The multiple winding needles are arranged on the station change turntable at intervals and switch between the multiple stations under the drive of the station change turntable.

3. The laser winding machine according to claim 1, characterized in that: The laser cutting mechanism includes a laser mounting seat, a laser cutter, a laser cutting roller and a dust suction structure. The laser mounting seat is arranged on a mounting plate. The laser cutting roller is rotatably arranged on the laser mounting seat and is used to convey the pole piece. The laser cutter is arranged on the laser mounting seat and is used to cut the pole piece to form a pole ear. The dust suction structure is arranged at the lower part of the laser mounting seat and is located below the laser cutting roller, and is used to receive and suck away the dust generated by the cutting.

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