CN115000529A - Diaphragm continuous winding machine - Google Patents
Diaphragm continuous winding machine Download PDFInfo
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- CN115000529A CN115000529A CN202210700133.4A CN202210700133A CN115000529A CN 115000529 A CN115000529 A CN 115000529A CN 202210700133 A CN202210700133 A CN 202210700133A CN 115000529 A CN115000529 A CN 115000529A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/005—Devices for making primary cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The embodiment of the invention provides a diaphragm continuous winding machine, which relates to the technical field of lithium battery manufacturing, and comprises a mounting plate, a winding head assembly, a feeding mechanism, a film combining and laminating mechanism and a diaphragm cutting assembly, wherein the diaphragm cutting assembly is arranged at the lower part of the film combining and laminating mechanism and is used for cutting a diaphragm positioned at the lower part of a winding position to form a diaphragm head and a diaphragm tail; the vacuum winding needle located at the winding station is used for adsorbing and winding the head of the diaphragm, and the vacuum winding needle located at the rubberizing station is used for winding the tail of the diaphragm in an ending mode, so that the diaphragm and the pole piece can move at a constant speed in the process of winding at the station changing position. Compared with the prior art, the winding device can realize that the diaphragm is wound at a constant speed in the process of station changing winding, and the diaphragm is cut off quickly and synchronously under the condition that the diaphragm keeps running, so that winding is finished under the motion state of the diaphragm, the diaphragm is prevented from being cut temporarily, the auxiliary time of winding the battery cell is shortened, and the efficiency of the winding process is improved.
Description
Technical Field
The invention relates to the technical field of lithium battery manufacturing, in particular to a diaphragm continuous winding machine.
Background
In the current production process of the power lithium battery, a cathode sheet, an anode sheet and a diaphragm are mainly wound by a winding machine to form a battery cell, after one battery cell is wound, a station is required to be changed to wind the next battery cell, and at the moment, the diaphragm at the tail part of the last battery cell is required to be cut off, so that the previous battery cell is finished and the next electric wire starts to be wound. At present, after the diaphragm is cut off and the station needs to be changed, the diaphragm is cut off when the diaphragm is in a stop state, and then the next battery cell is continuously wound, a large amount of auxiliary time needs to be spent in the process, and the equipment efficiency is low.
Disclosure of Invention
The invention aims to provide a diaphragm continuous winding machine which can rapidly and synchronously cut off a diaphragm without speed reduction, so that winding is finished in a diaphragm movement state, stopping for cutting is avoided, auxiliary time for winding a battery cell is reduced, and efficiency of a winding process is improved.
Embodiments of the invention may be implemented as follows:
in a first aspect, the present invention provides a continuous membrane winding machine comprising:
the winding head assembly is provided with a winding station, a rubberizing station and a blanking station, and vacuum winding needles are rotatably arranged on the winding station, the rubberizing station and the blanking station and can rotate and switch among the winding station, the rubberizing station and the blanking station so as to realize station-changing winding;
the feeding mechanism is arranged at the upper part of the winding head assembly and is used for inputting a lower diaphragm, a cathode sheet, an upper diaphragm and an anode sheet which are sequentially arranged to the winding station;
the film combining and laminating mechanism is arranged between the feeding mechanism and the winding head assembly and is used for laminating the upper diaphragm and the lower diaphragm into a whole and forming a laminated diaphragm;
the membrane cutting assembly is arranged at the lower part of the membrane combining and adhering mechanism and is used for cutting the adhered membrane positioned at the winding position and in a moving state to form a membrane head and a membrane tail;
the vacuum winding needle located at the winding station is used for adsorbing and winding the head of the diaphragm, and the vacuum winding needle located at the rubberizing station is used for adsorbing and winding the tail of the diaphragm, so that the laminated diaphragm, the cathode sheet and the anode sheet are conveyed at a constant speed in the process of winding at the station changing station.
In an alternative embodiment, the membrane severing assembly includes a membrane laser cutter for emitting an angularly adjustable cutting laser to chase the conformable membrane at the winding station.
In an alternative embodiment, the diaphragm severing assembly comprises a resistance wire cutter for simultaneously severing the conformable diaphragm at the winding station; or the diaphragm cutting assembly comprises a cutting knife which is used for synchronously cutting the attached diaphragm positioned at the winding station.
In an optional embodiment, the feeding mechanism comprises two diaphragm feeding assemblies and two pole piece feeding assemblies, and the two diaphragm feeding assemblies and the two pole piece feeding assemblies are arranged in a staggered manner; the film combining and attaching mechanism comprises a film combining roller assembly, and the film combining roller assembly is used for pressing the lower diaphragm.
In an alternative embodiment, the film combining and adhering mechanism further comprises an electrostatic generator, which is arranged at the lower part of the film combining roller assembly and is used for applying static electricity to the surface of the lower membrane so as to adhere the lower membrane and the upper membrane together under the action of the static electricity to form the adhering membrane.
In an optional embodiment, the continuous membrane winding machine further includes a static electricity eliminating assembly, the static electricity eliminating assembly includes a first static electricity eliminator and a second static electricity eliminator, the first static electricity eliminator is arranged close to the winding station and used for eliminating static electricity on the laminated membrane at the pre-winding position of the membrane, and the second static electricity eliminator is arranged close to the rubberizing station and used for eliminating static electricity on the laminated membrane at the end of the battery core.
In an optional embodiment, a first membrane pressing roller assembly is further arranged between the membrane cutting assembly and the electrostatic generator and is used for being in rolling fit with the vacuum winding needle located at the winding station so as to support the membrane head.
In an alternative embodiment, an air nozzle assembly is further disposed on the first membrane pressing roller assembly, and the air nozzle assembly is configured to spray air to the membrane head so as to attach the membrane head to the surface of the vacuum winding needle at the winding station.
In an optional implementation mode, a second membrane pressing and film rolling assembly is further arranged below the membrane cutting assembly, a pressing roller supporting roller is further arranged below the winding position, and the second membrane pressing and film rolling assembly is used for being attached to the pressing roller supporting roller in a rolling mode to support the membrane tail.
In an alternative embodiment, a third static eliminator is further disposed on the second diaphragm squeeze film roller assembly, and the third static eliminator is used for eliminating at least part of static on the tail of the diaphragm.
In an optional implementation mode, the pole piece feeding assembly comprises a manipulator module and a pre-rolling deviation rectifying module, the manipulator module is used for conveying the anode sheet or the cathode sheet, and the pre-rolling deviation rectifying module is arranged on the discharging side of the manipulator module and used for rectifying deviation of the anode sheet or the cathode sheet.
In an optional embodiment, a plurality of vacuum adsorption holes are formed in the surface of each vacuum winding needle, and each vacuum adsorption hole is used for being connected with an external vacuum pump so that the diaphragm is firstly adsorbed on the surface of the vacuum winding needle.
The beneficial effects of the embodiment of the invention include, for example:
according to the diaphragm continuous winding machine provided by the embodiment of the invention, the winding station, the rubberizing station and the blanking station are arranged on the winding head assembly, the vacuum winding needles are rotatably arranged on the winding supply station, the rubberizing station and the blanking station, the diaphragm and the pole piece are input to the winding station by using the feeding mechanism, and the diaphragm and the pole piece are bonded into a whole by using the film combining and bonding mechanism, so that the subsequent winding action is facilitated. During actual winding, the feeding mechanism finishes feeding the diaphragm and the pole piece, the diaphragm and the pole piece are jointed into a whole under the action of the film combining and jointing mechanism, a vacuum winding needle on a winding station is utilized to finish winding action, when the vacuum winding needle is wound to a preset thickness, a station-changing winding is needed, the vacuum winding needle of the winding station is rotationally switched to a rubberizing station, the vacuum winding needle of the blanking station is rotationally switched to the winding station, the diaphragm which is positioned at the winding station and in a moving state is cut by the diaphragm cutting assembly, so that a diaphragm head and a diaphragm tail are formed, the diaphragm head is adsorbed and wound by a vacuum winding needle positioned at a winding station to complete a new winding action, the diaphragm tail is wound by the vacuum winding needle positioned at a rubberizing station to complete the original winding action, and the diaphragm and the pole piece are kept to move at a constant speed in the station-changing winding engineering. Compared with the prior art, the invention can realize the uniform-speed tape transport of the diaphragm and the pole piece in the process of station-changing winding and fast and synchronously cut off under the condition that the diaphragm does not decelerate, thereby finishing the winding under the motion state of the diaphragm, avoiding the shutdown for cutting, reducing the auxiliary time of the winding of the battery cell and improving the efficiency of the winding process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of an overall structure of a continuous membrane winding machine according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of the feeding mechanism in FIG. 1;
fig. 3 is a partial structural schematic view of a continuous membrane winding machine according to an embodiment of the present invention.
Icon: 100-diaphragm continuous winder; 110-a winding head assembly; 111-vacuum needle winding; 113-a winding station; 117-rubberizing station; 118-a press roll support roll; 119-a blanking station; 120-a feeding mechanism; 121-a diaphragm feeding assembly; 123-pole piece feeding assembly; 125-a manipulator module; 127-a pre-roll deviation rectifying module; 130-film combining and laminating mechanism; 131-a film-combining roller assembly; 133-an electrostatic generator; 140-a diaphragm shut-off assembly; 150-a final roll assembly; 160-tail glue component; 170-a first diaphragm roller assembly; 171-an air nozzle assembly; 180-a second diaphragm roller assembly; 181-third static eliminator; 190-a static elimination component; 191-a first static eliminator; 193-second static eliminator.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
As disclosed in the background, the winding mechanism of the prior art, which typically requires cutting after shutdown when cutting the separator, results in a long auxiliary time, which affects the efficiency of the apparatus.
Further, the structure that utilizes the cutting roller at the uniform velocity to cut the diaphragm in step has appeared, however, this kind of cutting roller need keep with roll needle synchronous revolution to because be subject to the roller footpath, can't adapt to and walk the piece at a high speed, adopted the mode of cutter on the roller simultaneously, the atress appears the deviation easily during leading to the cutting, and then makes the incision unevenness or the phenomenon that appears not cutting off, and cutting effect is poor.
In addition, the needle clamping structure commonly adopted by the winding needle in the prior art needs the diaphragm to stretch into the center of the winding needle for clamping and then to be wound, and the structure undoubtedly needs to be stopped, so that the auxiliary time is increased, and the equipment efficiency is reduced. Meanwhile, in the prior art, a thermal composite structure is usually adopted for the double-diaphragm and pole piece structures before being rolled, so that on one hand, the structure can influence the shapes and the qualities of the diaphragm and the pole piece due to thermal stress, on the other hand, the structure is more complex, the occupied space is larger, and the arrangement of other equipment at the rolled position is not facilitated.
In order to solve the above problems, the present invention provides a novel continuous winding machine for a separator, and it should be noted that features of embodiments of the present invention may be combined with each other without conflict.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
With reference to fig. 1 to 3, the present embodiment provides a diaphragm continuous winding machine 100, which can realize uniform-speed tape transport of a diaphragm and a pole piece in a station-changing winding process, and fast and synchronously cut off the diaphragm without speed reduction, so that winding is completed in a diaphragm motion state, shutdown for cutting is avoided, auxiliary time for winding a battery cell is reduced, and efficiency of the winding process is improved.
The continuous membrane winding machine 100 provided by this embodiment includes a mounting plate, a winding head assembly 110, a feeding mechanism 120, a membrane combining and attaching mechanism 130, a membrane cutting assembly 140, a tail roller assembly 150, and a tail adhesive attaching assembly 160, where the mounting plate is a complete machine mounting structure, the winding head assembly 110, the feeding mechanism 120, the membrane combining and attaching mechanism 130, the membrane cutting assembly 140, the tail roller assembly 150, and the tail adhesive attaching assembly 160 are all disposed on the mounting plate, the winding head assembly 110 is provided with a winding station 113, an adhesive attaching station 117, and a blanking station 119, and the winding station 113, the adhesive attaching station 117, and the blanking station 119 are all rotatably provided with vacuum winding needles 111, and the vacuum winding needles 111 can be rotated and switched among the winding station 113, the adhesive attaching station 117, and the blanking station 119 to realize station-changing winding; the feeding mechanism 120 is arranged at the upper part of the winding head assembly 110 and is used for inputting a lower diaphragm, a cathode sheet, an upper diaphragm and an anode sheet which are arranged in sequence to the winding station 113; the film combining and adhering mechanism 130 is arranged between the feeding mechanism 120 and the winding head assembly 110 and is used for integrating the lower diaphragm and the upper diaphragm into a whole and forming an adhering diaphragm; the membrane cutting assembly 140 is arranged at the lower part of the membrane combining and attaching mechanism 130 and is used for cutting the attached membrane positioned at the winding position and in the moving state so as to form a membrane head and a membrane tail; the vacuum winding needle 111 located at the winding station 113 is used for adsorbing and winding the head of the diaphragm, and the vacuum winding needle 111 located at the rubberizing station 117 is used for adsorbing and winding the tail of the diaphragm, so that the diaphragm and the pole piece can move at a constant speed in the process of winding at the station changing.
In this embodiment, the closing-in roller assembly 150 is disposed on the mounting plate and close to the gluing station 117, and is configured to roll and press-fit on the vacuum winding needle 111 located on the gluing station 117, so as to complete the closing-in pressing-in function and ensure the winding formation of the battery cell. The tail rubber pasting assembly 160 is arranged below the tail roller assembly 150 and is used for performing rubber pasting action on the wound battery cell. Meanwhile, a manipulator is arranged near the blanking station 119 for blanking.
In this embodiment, the winding head assembly 110 includes a winding disc rotatably disposed on the mounting plate, the three vacuum winding pins 111 are distributed on the winding disc in a regular triangle, and the winding disc can rotate to drive the three vacuum winding pins 111 to switch among the winding station 113, the rubberizing station 117 and the blanking station 119, so as to realize the winding, rubberizing and blanking processes. Each vacuum winding needle 111 is rotatably arranged on the winding disc, and the three vacuum winding needles 111 can rotate while revolving around, so that winding and other actions are completed.
In the present embodiment, a plurality of vacuum suction holes are provided on the surface of each vacuum winding needle 111, and each of the plurality of vacuum suction holes is used for being connected to an external vacuum pump, so that the membrane is firstly sucked on the surface of the vacuum winding needle 111. Therefore, a needle clamping type structure in the conventional technology is avoided, the coiling action can be finished without stopping the machine, and the coiling efficiency is greatly improved.
In this embodiment, the membrane severing assembly 140 includes a membrane laser cutter configured to emit an angularly adjustable cutting laser to chase the conformable membrane at the winding station 113. Specifically, the diaphragm laser cutter comprises an emergent lens, the emergent lens can adjust the angle of emergent laser, so that the cutting laser acts on the same position of the surface of the diaphragm, the diaphragm laser cutter is used for finishing the chasing and cutting action of the attached diaphragm, and the cutting action is finished under the motion state of the attached diaphragm. Compared with the conventional cutter, the laser cutting method has the advantages that the cut surface of the laser cutting is smooth, the logic implementation mode of non-contact type laser synchronous follow-up cutting is realized, and the complex cutting mechanism is avoided. Specifically, the angle adjustment of the cutting laser emitted by the diaphragm laser cutter can be realized by adjusting the angle of the lens, the whole laser can be rotatably mounted, the rotating angle is controlled by the motor, and the adjustment of the laser angle can also be realized.
Of course, in other preferred embodiments of the present invention, the diaphragm cutting manner of the diaphragm cutting assembly 140 may be thermal radiation cutting, heating wire cutting, physical knife cutting, etc. For example, the diaphragm severing assembly 140 may include a resistive wire cutter for simultaneously severing the conformable diaphragm at the winding station; alternatively, the membrane cutting assembly 140 includes a cutting knife for simultaneously cutting the conformable membrane at the winding station.
In this embodiment, the feeding mechanism 120 includes two membrane feeding assemblies 121 and two pole piece feeding assemblies 123, the two membrane feeding assemblies 121 and the two pole piece feeding assemblies 123 are arranged in a staggered manner, specifically, the two pole piece feeding assemblies 123 are respectively used for inputting an anode piece and a cathode piece, the two membrane feeding assemblies 121 are respectively used for inputting an upper membrane and a lower membrane, and the specific distribution mode thereof can refer to the existing winding mechanism.
In this embodiment, the pole piece feeding assembly 123 includes a manipulator module 125 and a pre-winding deviation rectifying module 127, the manipulator module 125 is used for conveying pole pieces, and the pre-winding deviation rectifying module 127 is disposed on a discharging side of the manipulator module 125 and is used for rectifying deviation of the pole pieces. Specifically, the manipulator module 125 can realize the conveying and cutting-off actions of the pole pieces, and the deviation rectifying module 127 before winding can realize the deviation rectifying action of the pole pieces before winding, so that the pole pieces are aligned and attached to the diaphragms, and the winding quality is ensured.
The film combining and adhering mechanism 130 comprises a film combining roller assembly 131 and an electrostatic generator 133, wherein the film combining roller assembly 131 is used for pressing the lower diaphragm, and the electrostatic generator 133 is arranged at the lower part of the film combining roller assembly 131 and is used for applying static electricity to the surface of the lower diaphragm so as to adhere the lower diaphragm and the upper diaphragm together under the action of the static electricity. Specifically, the film combining roller assembly 131 comprises a film combining cylinder body and a film combining roller, the film combining cylinder body is an air cylinder or a hydraulic cylinder and is provided with a piston rod, the film combining roller is rotatably arranged at the end of the piston rod, and the film combining roller can extrude the lower diaphragm under the action of the film combining cylinder, so that the lower diaphragm is convenient to be transported, and static electricity is convenient to apply subsequently.
It is worth noting that the film combining cylinder body can be obliquely arranged, so that a piston rod of the film combining cylinder body can be perpendicular to the conveying direction of the corresponding cathode piece, meanwhile, the conveying of the lower diaphragm is facilitated, and the phenomenon that the film combining cylinder body blocks the conveying direction of the lower diaphragm is avoided.
It should be noted that the electrostatic generator 133 is used herein to apply static electricity to the surface of the lower diaphragm, and the basic structure and principle thereof may refer to the existing electrostatic generator 133. Because the number of the diaphragm and the number of the pole pieces are two in the embodiment, static electricity can be applied to one of the lower diaphragms, and the lower diaphragm can be naturally adsorbed to the upper diaphragm due to the static electricity in the subsequent extrusion and lamination process, so that the integral diaphragm is charged with the static electricity. In this embodiment, the static electricity generator 133 is disposed on the mounting plate and outside the winding head assembly 110, so that static electricity is applied to the surface of the lower diaphragm entering the winding head assembly 110, and the accompanying static electricity is naturally conducted to the upper diaphragm which is subsequently attached thereto. Here, the adhesion means that the two are electrostatically attracted to each other.
In this embodiment, the static electricity generator 133 only applies static electricity to the portion of the separator to be cut, so that the cut head and tail of the separator are both charged with static electricity, and other separators in normal winding are not charged with static electricity, so as to avoid affecting the winding quality.
It should be noted that in other preferred embodiments of the present invention, the static electricity generator 133 may not be provided, the surface of the diaphragm may also have a small amount of static electricity during the diaphragm conveying process, and the surface of the diaphragm is clean and naturally attached when the upper diaphragm and the lower diaphragm contact each other.
In this embodiment, a first diaphragm pressing roller assembly 170 is further disposed between the diaphragm cutting assembly 140 and the electrostatic generator 133, and the first diaphragm pressing roller assembly 170 is configured to roll and attach to the vacuum winding needle 111 at the winding station 113 to support the diaphragm head. Specifically, first diaphragm compression roller subassembly 170 includes first compression roller jar and first diaphragm compression roller, first compression roller jar also has the piston rod, first diaphragm compression roller rotates the tip that sets up at the piston rod, and, first compression roller jar can drive the diaphragm compression roller and be close to or keep away from coiling station 113, in station switching process, coiling station 113 is kept away from to first compression roller jar, avoid blockking vacuum and roll up needle 111, after the station switches in place, first compression roller jar can drive the laminating of first diaphragm compression roller on being located coiling station 113's vacuum and roll up needle 111, thereby pressfitting diaphragm and pole piece, cut off the effect that the in-process played the support diaphragm head at the diaphragm, pan feeding mechanism 120 of diaphragm fracture influence top when avoiding cutting.
It should be noted that in this embodiment, after the winding is completed, that is, after the vacuum winding needle 111 located at the winding station 113 completes at least one turn of winding, the first pressing roller cylinder may also drive the first diaphragm pressing roller to be away from the vacuum winding needle 111 until the station switching operation of the next round.
In this embodiment, the first membrane pressing roller assembly 170 is further provided with an air nozzle assembly 171, and the air nozzle assembly 171 is used for spraying air to the membrane head so as to attach the membrane head to the surface of the vacuum winding needle 111 at the winding station 113. Specifically, the air nozzle assembly 171 is disposed under the first diaphragm pressing roller, so that the diaphragm head after the diaphragm is cut can be attached to the surface of the vacuum winding needle 111, and the diaphragm head can be stably wound by the combined action of vacuum suction on the surface of the vacuum winding needle 111.
It should be noted that, in the present embodiment, the air nozzle assembly 171 has a high-pressure air nozzle, the high-pressure air nozzle is connected to an external high-pressure pump, so as to provide high-pressure air, the spraying direction of the high-pressure air nozzle is on the side of the membrane far away from the vacuum winding needle 111 of the winding station 113, so as to apply air flow towards the surface of the vacuum winding needle 111 to the membrane, after the membrane is cut, the membrane head is in a free state, and at this time, the membrane head can be attached to the surface of the vacuum winding needle 111 under the action of the high-pressure air flow, so as to facilitate the vacuum winding needle 111 to adsorb, and thus the winding operation can be smoothly completed.
In this embodiment, the continuous membrane winding machine 100 further includes a static electricity eliminating assembly 190, the static electricity eliminating assembly 190 includes a first static electricity eliminator 191 and a second static electricity eliminator 193, the first static electricity eliminator 191 is disposed near the winding station 113 and is used for eliminating static electricity on the membrane at the pre-winding position of the membrane, and the second static electricity eliminator 193 is disposed near the rubberizing station 117 and is used for eliminating static electricity on the membrane at the end of the cell. Specifically, the second static eliminator 193 can eliminate static of the diaphragm and the pole piece on the vacuum winding needle 111 at the rubberizing station 117, so as to avoid forming a battery cell with static outside to affect the quality of the battery cell. The first part of the diaphragm is subjected to static elimination by the first static eliminator 191, so that the diaphragm and the pole piece at the winding part can also complete the static elimination action before winding and covering, and the quality of the battery cell with static inside is prevented from being influenced.
It should be noted that the structure and the operation principle of the static eliminator in this embodiment can be referred to the existing static eliminating device.
In this embodiment, a second diaphragm pressing roller assembly is further disposed below the diaphragm cutting assembly 140, and a pressing roller support roller 118 is further disposed below the winding position, and the second diaphragm pressing roller assembly is configured to roll and adhere to the pressing roller support roller 118 to support the diaphragm tail. Specifically, the number of the press roll supporting rollers 118 may be three, three of which are distributed in a triangular shape and correspond to the three vacuum winding pins 111, respectively, so that the press roll supporting rollers 118 are disposed below the winding station 113 when any one of the vacuum winding pins 111 moves to the winding station 113. The second membrane pressing roller assembly comprises a second pressing roller cylinder and a second membrane pressing roller, the second membrane pressing roller is rotatably arranged at the end part of a piston rod of the second pressing roller cylinder, and is driven by the second pressing roller cylinder to be close to or far away from the pressing roller supporting roller 118. In actual operation, in the process of station switching, the second compression roller cylinder drives the second diaphragm compression roller to be far away from the compression roller support roller 118, so that the interference of the second compression roller cylinder and the second diaphragm compression roller on the vacuum winding needle 111 is avoided, and after the station switching is completed, the second compression roller cylinder drives the second diaphragm compression roller to be close to the compression roller support roller 118 and to be pressed on the compression roller support roller 118, so that the diaphragm and the pole piece are pressed together, and a supporting effect is achieved. After the diaphragm is cut off, the diaphragm and the pole piece on the vacuum winding needle 111 at the rubberizing station 117 can be prevented from being affected by the diaphragm breakage.
In this embodiment, a third static eliminator 181 is further disposed on the second diaphragm squeeze film roller assembly, and the third static eliminator 181 is configured to eliminate at least part of static electricity on the tail of the diaphragm. Specifically, here, the third static eliminator 181 is located on the upper side of the second diaphragm pressing roller, so that static electricity on the diaphragm tail formed after the diaphragm is cut can be eliminated to further avoid forming a cell with static electricity.
The continuous membrane winding machine 100 provided in this embodiment operates according to the following principle:
the pole piece of the battery cell is terminated at a winding station 113, the winding head assembly 110 synchronously changes stations, the vacuum winding needle 111 at a blanking station 119 is switched to the winding station 113, and at the moment, the winding station 113, the rubberizing station 117 and the blanking station 119 synchronously rotate at the same speed. And at the station changing, the first diaphragm pressing roller assembly 170 and the second diaphragm pressing roller assembly 180 synchronously extend out and tightly press the diaphragm, and the diaphragm laser cutting assembly cuts off the diaphragm by synchronizing the diaphragm winding speed. The air nozzle assembly 171 attaches the upper and lower diaphragms which are suspended and electrostatically adsorbed together to the surface of the vacuum winding needle 111 through the action force of air flow, and the upper and lower diaphragms are finally wound together under the combined action of the vacuum adsorption force of the vacuum winding needle 111; finally, static electricity applied to the diaphragm cut position is eliminated by the first static eliminator 191 and the second static eliminator 193. In this process, the winding station 113 performs two actions simultaneously, one being a revolution around the center of the winding head; one is the autorotation of the axis of the winding needle, and the two actions are matched to realize the uniform motion of the moving band of the diaphragm and the pole piece in the process of station-changing winding.
In this embodiment, a logic implementation manner of non-contact laser synchronous chase-cutting and a matching manner of synchronous ending of the diaphragm and synchronous winding speed of the next cell diaphragm head are adopted, so that diaphragm cutting action in a motion state (preferably in a uniform speed state) is realized. Meanwhile, the double-layer diaphragm is firstly adsorbed by applying static electricity and is adsorbed on the surface under the adsorption action of the air nozzle assembly 171 and the vacuum winding needle 111, and finally the upper and lower layers of diaphragms are wound together. And static eliminators are added at the pre-rolling position of the winding needle diaphragm and the ending position of the battery cell to eliminate static applied at the cutting position of the diaphragm. The air nozzle assembly 171 attaches the membrane after the membrane is cut to the surface of the vacuum winding needle 111, and the head of the membrane is stably wound under the combined action of the vacuum adsorption winding needle. During actual winding, the feeding mechanism 120 finishes feeding the diaphragm and the pole piece, the diaphragm and the pole piece are bonded into a whole under the action of the film combining and bonding mechanism 130, the winding action is finished by the vacuum winding needle 111 on the winding station 113, when the vacuum winding needle 111 is wound to a preset thickness, the station-changing winding is required, the vacuum winding needle 111 of the winding station 113 is rotationally switched to the rubberizing station 117, the vacuum winding needle 111 of the blanking station 119 is rotationally switched to the winding station 113, at this time, the diaphragm located at the winding station 113 and in a moving state is cut by the diaphragm cutting assembly 140, so that a diaphragm head and a diaphragm tail are formed, the membrane is firstly adsorbed and wound by the vacuum winding needle 111 positioned at the winding station 113 to complete a new winding action, the membrane is wound by the vacuum winding needle 111 at the rubberizing station 117 to complete the original winding action, and the membrane and the pole piece are kept to move at a constant speed in the station changing winding engineering.
In summary, the continuous membrane winding machine 100 provided by the embodiment further has the following advantages: the supporting effect of the first diaphragm compression roller assembly 170 and the second diaphragm compression roller assembly 180 is utilized, so that independent compaction of diaphragm feeding and ending is realized, and the influence of diaphragm cutting on feeding and winding is avoided. The diaphragm is rolled in through the air nozzle assembly 171 and the vacuum adsorption action, and a traditional needle clamping structure is not needed, so that the structure is simple and efficient. Meanwhile, the diaphragm is cut by laser, so that the laser chasing cutting of the diaphragm is realized, the winding auxiliary time is reduced, and the equipment efficiency is improved. And utilize the static principle to realize the absorption between the diaphragm, avoided the complicated structure that conventional heat recombination mechanism brought to can not influence the physical properties of diaphragm, pole piece, can not cause structural influence to internal stress, guarantee the security of coiling, and need not to adopt auxiliary materials such as viscose.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A continuous winding machine of a separator, characterized by comprising:
the winding head assembly is provided with a winding station, a rubberizing station and a discharging station, and vacuum winding needles are rotatably arranged on the winding station, the rubberizing station and the discharging station and can be rotationally switched among the winding station, the rubberizing station and the discharging station so as to realize station-changing winding;
the feeding mechanism is arranged at the upper part of the winding head assembly and is used for inputting a lower diaphragm, a cathode sheet, an upper diaphragm and an anode sheet which are sequentially arranged to the winding station;
the film combining and laminating mechanism is arranged between the feeding mechanism and the winding head assembly and is used for laminating the upper diaphragm and the lower diaphragm into a whole and forming a laminated diaphragm;
the membrane cutting-off assembly is arranged at the lower part of the membrane combining and attaching mechanism and is used for cutting the attached membrane which is positioned at the lower part of the winding position and moves to form a membrane head and a membrane tail;
the vacuum winding needle located at the winding station is used for adsorbing and winding the first diaphragm, and the vacuum winding needle located at the rubberizing station is used for winding the tail of the diaphragm, so that the diaphragm, the cathode sheet and the anode sheet are conveyed at a constant speed in the process of winding at the station changing.
2. The continuous membrane winder of claim 1, wherein the membrane severing assembly includes a membrane laser cutter for emitting an angularly adjustable cutting laser to sever the conformable membrane at the winding station.
3. The continuous membrane winder as claimed in claim 1, wherein the membrane severing assembly comprises a resistance wire cutter for simultaneously severing the conformable membrane at the winding station;
or the diaphragm cutting assembly comprises a cutting knife which is used for synchronously cutting off the attached diaphragm positioned at the winding station.
4. The continuous membrane winding machine according to claim 1, wherein the feeding mechanism comprises two membrane feeding assemblies and two pole piece feeding assemblies, and the two membrane feeding assemblies and the two pole piece feeding assemblies are arranged in a staggered manner; the film combining and attaching mechanism comprises a film combining roller assembly, and the film combining roller assembly is used for pressing the lower diaphragm.
5. The continuous membrane winding machine according to claim 4, wherein the membrane combining and adhering mechanism further comprises an electrostatic generator disposed at a lower portion of the membrane combining roller assembly for applying static electricity to a surface of the lower membrane to adhere the lower membrane and the upper membrane together under the action of the static electricity to form the adhered membrane.
6. The continuous membrane winder of claim 5, further comprising a static elimination assembly including a first static eliminator positioned proximate to the winding station for eliminating static electricity from the conformable membrane at a pre-roll of the membrane and a second static eliminator positioned proximate to the taping station for eliminating static electricity from the conformable membrane at a final end of the cell.
7. The continuous membrane winding machine according to claim 5, wherein a first membrane pressing roller assembly is further arranged between the membrane cutting assembly and the electrostatic generator and is used for being in rolling fit with the vacuum winding needle at the winding station so as to support the membrane head.
8. The continuous membrane winding machine as claimed in claim 7, wherein an air nozzle assembly is further disposed on the first membrane pressing roller assembly, and the air nozzle assembly is configured to inject air toward the membrane head to attach the membrane head to the surface of the vacuum winding needle at the winding station.
9. The continuous membrane winding machine according to claim 5, characterized in that a second membrane pressing roller assembly is further arranged below the membrane cutting assembly, a pressing roller supporting roller is further arranged below the winding position, and the second membrane pressing roller assembly is used for being in rolling fit with the pressing roller supporting roller to support the membrane tail.
10. The continuous membrane winder as claimed in claim 9, wherein a third static eliminator is further disposed on the second membrane laminating roller assembly for eliminating at least part of static electricity on the membrane tail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210700133.4A CN115000529A (en) | 2022-06-20 | 2022-06-20 | Diaphragm continuous winding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210700133.4A CN115000529A (en) | 2022-06-20 | 2022-06-20 | Diaphragm continuous winding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115000529A true CN115000529A (en) | 2022-09-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210700133.4A Pending CN115000529A (en) | 2022-06-20 | 2022-06-20 | Diaphragm continuous winding machine |
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| Country | Link |
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| CN (1) | CN115000529A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024060741A1 (en) * | 2022-09-23 | 2024-03-28 | 江苏时代新能源科技有限公司 | Cut-off device and battery assembly line production apparatus |
-
2022
- 2022-06-20 CN CN202210700133.4A patent/CN115000529A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024060741A1 (en) * | 2022-09-23 | 2024-03-28 | 江苏时代新能源科技有限公司 | Cut-off device and battery assembly line production apparatus |
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