WO2025112171A1 - 叠片机 - Google Patents

叠片机 Download PDF

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Publication number
WO2025112171A1
WO2025112171A1 PCT/CN2024/070395 CN2024070395W WO2025112171A1 WO 2025112171 A1 WO2025112171 A1 WO 2025112171A1 CN 2024070395 W CN2024070395 W CN 2024070395W WO 2025112171 A1 WO2025112171 A1 WO 2025112171A1
Authority
WO
WIPO (PCT)
Prior art keywords
tension
material strip
roller
diaphragm
diaphragm material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/070395
Other languages
English (en)
French (fr)
Inventor
杨涛
朱文达
耿明鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Lead Intelligent Equipment Co Ltd
Original Assignee
Wuxi Lead Intelligent Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Lead Intelligent Equipment Co Ltd filed Critical Wuxi Lead Intelligent Equipment Co Ltd
Priority to EP24787039.7A priority Critical patent/EP4586350A4/en
Publication of WO2025112171A1 publication Critical patent/WO2025112171A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • 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
    • H01M10/04—Construction or manufacture in general
    • 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0459—Cells or batteries with folded separator between plate-like electrodes
    • 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
    • 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
    • H01M10/0583—Construction or manufacture of accumulators with folded construction elements except wound ones, i.e. folded positive or negative electrodes or separators, e.g. with "Z"-shaped electrodes or separators
    • 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
    • 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
    • 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

Definitions

  • the present application relates to the technical field of lithium battery equipment, and in particular to a stacking machine.
  • Lamination is a common process for preparing lithium battery cells.
  • a battery cell By alternately stacking positive and negative electrode sheets on a lamination table and placing a diaphragm between the positive and negative electrode sheets, a battery cell can be formed.
  • the electrode sheets may be found to be deflected during the incoming material process, so the electrode sheets generally need to be placed on the correction table by the unloading robot for correction, and then placed on the lamination table by the lamination robot after the correction is completed.
  • the production efficiency of the battery cell is low.
  • a laminating machine comprises a laminating table, a feeding mechanism, a laminating mechanism, a deflection correcting table and a conveying mechanism, wherein the deflection correcting table is used to carry pole pieces and perform deflection correcting operations on the pole pieces, the conveying mechanism is used to convey the pole pieces, and the deflection correcting table can move between the laminating table and the conveying mechanism; the feeding mechanism can obtain the pole pieces on the conveying mechanism and place the pole pieces on the deflection correcting table; the laminating mechanism can obtain the pole pieces on the deflection correcting table and place the pole pieces on the laminating table.
  • the electrode sheets include positive electrode sheets and negative electrode sheets, and two conveying mechanisms are provided to convey the positive electrode sheets and the negative electrode sheets respectively.
  • the two conveying mechanisms are respectively located on both sides of the stacking table, and the unloading mechanism, the stacking mechanism and the deviation correction table are all provided with two and respectively cooperate with the two conveying mechanisms.
  • it also includes a diaphragm tension control device for conveying the diaphragm material strip to the lamination table, and the diaphragm tension control device can drive the diaphragm material strip to swing back and forth along a first direction, so that the diaphragm material strip is laid in a Z shape on the lamination table and arranged between two adjacent pole pieces.
  • the diaphragm tension control device includes a tension holding mechanism, the tension holding mechanism includes a first tension roller, a second tension roller and a drive assembly, and the diaphragm material strip passing through the diaphragm tension control device can pass between the first tension roller and the second tension roller;
  • the diaphragm material strip can be supported by the first tension roller and the second tension roller during the reciprocating swing along the first direction
  • the driving component can provide the first tension roller and the second tension roller with supporting force acting on the diaphragm material strip
  • the supporting force provided by the driving component is adjustable to tighten the diaphragm material strip and maintain a preset tension
  • the tension maintaining mechanism also includes a mounting bracket, a first swing arm and a second swing arm, one end of the first swing arm and the second swing arm are rotatably mounted on the mounting bracket, and the other end is respectively mounted with the first tension roller and the second tension roller, and the driving component transmits the supporting force to the first tension roller and the second tension roller respectively through the first swing arm and the second swing arm.
  • the driving assembly includes a first driving member and a second driving member, wherein the first driving member and the second driving member are respectively connected to the first swing arm and the second swing arm, and respectively provide supporting force for the first tension roller and the second tension roller.
  • the diaphragm tension control device also includes a swing roller mechanism, which is arranged downstream of the tension maintaining mechanism.
  • the diaphragm material strip output by the tension maintaining mechanism can pass through the swing roller mechanism.
  • the swing roller mechanism can move back and forth along the first direction and drive the diaphragm material strip to swing back and forth along the first direction.
  • the diaphragm tension control device further includes a tension sensor.
  • the force sensor can detect the tension of the diaphragm material strip passing through the tension maintaining mechanism.
  • the diaphragm tension control device further includes a buffer mechanism located on the upstream side of the tension maintaining mechanism, and the buffer mechanism is capable of buffering or releasing the diaphragm material strip.
  • the diaphragm tension control device also includes an unwinding mechanism and a tensioning mechanism, wherein the tensioning mechanism is located between the unwinding mechanism and the cache mechanism, the unwinding mechanism is capable of unwinding the diaphragm material strip, and the tensioning mechanism is capable of tensioning the diaphragm material strip between the unwinding mechanism and the cache mechanism.
  • the tensioning mechanism includes a base, a rocker arm and a tensioning roller, one end of the rocker arm is rotatably mounted on the base, the tensioning roller is mounted on an end of the rocker arm away from the base, and the diaphragm material strip can be wound around the tensioning roller.
  • the diaphragm tension control device also includes a tension isolation mechanism located between the buffer mechanism and the tensioning mechanism, and the diaphragm material strip passes through the tension isolation mechanism, and the tension isolation mechanism can isolate the tension of the diaphragm material strip between the buffer mechanism and the tensioning mechanism.
  • the tension-breaking mechanism includes a main drive roller and a pressure roller, and the diaphragm material strip can pass through and be clamped between the main drive roller and the pressure roller.
  • the main drive roller can provide a driving force to transport the diaphragm material strip to the cache mechanism.
  • the unloading mechanism obtains the electrode sheets on the conveying mechanism and moves toward the deflection correction table, and the deflection correction table moves toward the conveying mechanism, and when the unloading mechanism moves to the deflection correction table, the electrode sheets can be conveniently placed on the deflection correction table. Then, the unloading mechanism returns to its position, and the deflection correction table moves toward the stacking table while correcting the deflection of the electrode sheets. At the same time, the stacking mechanism moves toward the deflection correction table, and when the stacking mechanism moves to the deflection correction table, the electrode sheets on the deflection correction table can be conveniently obtained.
  • the stacking mechanism places the obtained electrode sheets on the stacking table, and the deflection correction table moves toward the conveying mechanism to prepare for the transfer of the next electrode sheet. It can be seen from this that the stroke of the unloading mechanism and the stacking mechanism can be significantly shortened, so the stacking of the electrode sheets can be conveniently performed. The cell cycle can be significantly accelerated, thereby improving the production efficiency of the battery cells.
  • FIG1 is a schematic structural diagram of a laminating machine in a preferred embodiment of the present application.
  • FIG2 is a schematic structural diagram of a diaphragm tension control device in the laminating machine shown in FIG1 ;
  • FIG3 is a schematic structural diagram of a tension maintaining mechanism in the diaphragm tension control device shown in FIG2 ;
  • FIG. 4 is a top view of the tension maintaining mechanism shown in FIG. 3 .
  • first and second are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as “first” and “second” may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality” is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • installed can be a fixed connection, a detachable connection, or an integral connection
  • it can be a mechanical connection or an electrical connection
  • it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined.
  • the specific meanings of the above terms in this application can be understood according to specific circumstances.
  • a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium.
  • a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • a first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
  • a laminating machine 10 in a preferred embodiment of the present application includes a laminating table 200 , a feeding mechanism 300 , a laminating mechanism 400 , a deflection correction table 500 and a conveying mechanism 600 .
  • the conveying mechanism 600 is used to convey the electrode 12.
  • the electrode 12 can be a single electrode or a composite electrode composed of multiple single electrode and a diaphragm. Specifically in this embodiment, the electrode 12 is a single electrode and includes a positive electrode and a negative electrode.
  • the deflection correction platform 500 is used to carry the pole piece 12 and perform deflection correction operations on the pole piece 12. Specifically, the deflection correction platform 500 can drive the carried pole piece 12 to translate and rotate, thereby adjusting the position and angle of the pole piece 12.
  • the deflection correction platform 500 generally also includes a deflection correction camera (not shown), which is used to obtain image information of the pole piece 12 to determine whether the pole piece 12 is offset.
  • the unloading mechanism 300 can obtain the electrode sheet 12 on the conveying mechanism 600 and place the electrode sheet 12 on the deflection correction platform 500.
  • the stacking mechanism 400 can obtain the electrode sheet 12 on the deflection correction platform 500 and place the electrode sheet 12 on the stacking platform 200.
  • the stacking platform 200 is used to carry the diaphragm and the electrode sheet 12. After the required number of layers of electrode sheets 12 are stacked on the stacking platform 200, a battery cell can be obtained.
  • the deflection correction platform 500 can move between the lamination platform 200 and the conveying mechanism 600.
  • a guide rail can be provided between the conveying mechanism 600 and the lamination platform 200, and the deflection correction platform 500 is installed on the guide rail and can slide back and forth along the guide rail, so that the deflection correction platform 500 can move back and forth between the lamination platform 200 and the conveying mechanism 600.
  • the unloading mechanism 30 transfers the electrode piece 12 on the conveying mechanism 600 to the deflection correction platform 500, the deflection correction platform 500 moves toward the conveying mechanism 600, and the unloading mechanism 300 moves toward the deflection correction platform 500 after obtaining the electrode piece 12 on the conveying mechanism 600; when the unloading mechanism 300 moves above the deflection correction platform 500, the electrode piece 12 can be placed on the deflection correction platform 500. After the unloading mechanism 300 puts down the electrode piece 12, the unloading mechanism 300 returns to its position and prepares to obtain the next electrode piece 12. It can be seen that in the process of transferring the electrode piece 12 to the deflection correction platform 500, since the deflection correction platform 500 and the unloading mechanism 300 move toward each other, the stroke of the unloading mechanism 300 can be reduced.
  • the deflection correction station 500 corrects the pole piece 12.
  • the deflection correction station 200 will turn around and move toward the stacking station 200, and the stacking mechanism 400 will move toward the deflection correction station 200 at the same time.
  • the stacking mechanism 400 moves above the deflection correction station 500, the pole piece 12 that has been corrected on the deflection correction station 500 can be obtained.
  • the stacking mechanism 400 moves toward the stacking station 200 and places the pole piece 12 on the stacking station 200.
  • the deflection correction station 500 turns around again and moves toward the conveying mechanism 600 to prepare to receive the next pole piece 12. It can be seen that in the process of transferring the pole piece 12 to the stacking station 200, since the deflection correction station 500 and the stacking mechanism 400 move toward each other, the stroke of the stacking mechanism 400 can also be reduced.
  • two conveying mechanisms 600 are provided and respectively convey the positive electrode sheet and the negative electrode sheet.
  • the two conveying mechanisms 600 are respectively located on both sides of the stacking table 200.
  • Two unloading mechanisms 300, stacking mechanisms 400 and deviation correction tables 500 are provided and respectively cooperate with the two conveying mechanisms 600.
  • two conveying mechanisms 600 are respectively located on the left and right sides of the laminating table 200, the conveying mechanism 600 on the left is used to convey the positive electrode sheet, and the conveying mechanism 600 on the right is used to convey the negative electrode sheet.
  • the unloading mechanism 300 coordinated with the conveying mechanism 600 on the left can first transfer the positive electrode sheet to the deflection correction table 500 on the left, and then the laminating mechanism 400 on the left transfers the positive electrode sheet from the deflection correction table 500 to the laminating table 200.
  • the unloading mechanism 300 coordinated with the conveying mechanism 600 on the right can first transfer the negative electrode sheet to the deflection correction table 500 on the right, and then the laminating mechanism 400 on the right transfers the negative electrode sheet from the deflection correction table 500 to the laminating table 200.
  • the two stacking structures 400 alternately place the electrode sheets 20 on the stacking platform 200.
  • the positive electrode sheets and the negative electrode sheets can be alternately stacked on the stacking platform 200 to obtain a battery cell.
  • the transportation and transfer are performed independently and are completed by different mechanisms, so the positive electrode sheets and the negative electrode sheets can be effectively avoided from being confused.
  • only one set of unloading mechanism 300, laminating mechanism 400, deflection correction platform 500 and conveying mechanism 600 may be provided to convey and transfer the positive electrode sheets and the negative electrode sheets.
  • the positive electrode sheets and the negative electrode sheets may be arranged alternately on the conveying mechanism 600 in advance, and the conveying mechanism 600 may convey the positive electrode sheets and the negative electrode sheets alternately to a position where they can be obtained by the unloading mechanism 300, so that they are alternately placed on the laminating platform 200.
  • the lamination machine 100 further includes a diaphragm tension control device 100 for conveying the diaphragm material strip 11 to the lamination table 200.
  • the diaphragm tension control device 100 can drive the diaphragm material strip 11 to swing back and forth along a first direction, so that the diaphragm material strip 11 is laid in a Z shape on the lamination table 200 and is arranged between two adjacent electrode sheets 12.
  • the stacking mechanism 400 can alternately place the positive and negative electrode sheets on the stacking table 200, and the diaphragm strip 11 is folded once each time a electrode sheet 12 is placed, so that adjacent electrode sheets 12 are separated by the diaphragm; the above operation is repeated until the stacked electrode sheets 12 reach the required number of layers to complete the preparation of a battery cell, and the diaphragm strip 11 laid on the stacking table 200 is folded into a "Z" shape.
  • the diaphragm is arranged in a Z-shaped folding manner, which can improve processing efficiency. It should be noted that in other embodiments, the diaphragm can also be cut into diaphragm sheets, and a layer of diaphragm sheets is placed on each pole piece 12, and two adjacent pole pieces 12 can also be separated by a diaphragm.
  • the diaphragm tension control device 100 includes a buffer mechanism 110 and a tension maintaining mechanism 120 .
  • the diaphragm material strip 11 for lamination can pass through the buffer mechanism 110 and the tension maintaining mechanism 120 in sequence.
  • the buffer mechanism 110 can buffer or release the membrane material strip 11.
  • the buffer mechanism 110 generally includes a plurality of buffer rollers 111, and the relative positions of the plurality of buffer rollers 111 are variable.
  • the membrane material strip 11 passing through the buffer mechanism 110 can be passed through the plurality of buffer rollers 111 in sequence, and the plurality of buffer rollers 111 can buffer or release the membrane material strip 11 by changing their relative positions.
  • the buffer mechanism 110 can buffer the redundant diaphragm material strip 11; and when the diaphragm material strip 11 is short, the buffer mechanism 110 can make up for the shortfall by releasing the diaphragm material strip 11. In this way, the diaphragm material strip 11 can be prevented from being loosened or broken. Obviously, in other embodiments, if the fluctuation of the diaphragm material strip 11 during the actual working process is small, the buffer mechanism 110 can also be omitted.
  • the tension holding mechanism 120 includes a first tension roller 121 , a second tension roller and a driving assembly 123 .
  • the membrane strip 11 passing through the tension holding mechanism 120 can pass between the first tension roller 121 and the second tension roller 122 .
  • the diaphragm material strip 11 is outputted by the tension holding mechanism 120 and laid in a Z shape on the lamination platform 200. At this time, the diaphragm material strip 11 swings back and forth in the first direction relative to the lamination platform 200, and swings back and forth in the first direction between the first tension roller 121 and the second tension roller 122. Moreover, during the reciprocating swing of the diaphragm material strip 11 in the first direction, it can be supported by the first tension roller 121 and the second tension roller 122, so that the diaphragm material strip 11 is tensioned.
  • the diaphragm tension control device 100 also includes a swing roller mechanism 170, which is arranged downstream of the tension maintaining mechanism 120.
  • the diaphragm material strip 11 output by the tension maintaining mechanism 120 can pass through the swing roller mechanism 170.
  • the swing roller mechanism 170 can move back and forth along the first direction and drive the diaphragm material strip 11 to swing back and forth along the first direction.
  • the swing roller mechanism 170 generally includes two oppositely disposed clamping rollers, and the diaphragm material strip 11 output by the tension holding mechanism 120 passes between the two clamping rollers. As the swing roller mechanism 170 reciprocates along the first direction, the diaphragm material strip 11 can be driven to swing back and forth along the first direction and achieve Z-shaped folding.
  • the driving assembly 123 can provide a supporting force for the first tension roller 121 and the second tension roller 122 to act on the diaphragm material strip 11, and the supporting force provided by the driving assembly 123 is adjustable to tighten the diaphragm material strip 11 and maintain a preset tension.
  • the first tension roller 121 can abut against the diaphragm material strip 11 and tighten it;
  • the second tension roller 122 can abut against the diaphragm material strip 11 and tighten it.
  • the first direction refers to the left-right direction.
  • the first tension roller 121 is located on the left side and the second tension roller 122 is located on the right side, and the diaphragm material strip 11 swings left and right during the lamination process.
  • the first tension roller 121 can abut against the diaphragm material strip 11 and tension it;
  • the second tension roller 122 can abut against the diaphragm material strip 11 and tension it.
  • first tension roller 121 and the second tension roller 122 can move under the drive of the driving component 123, so as to adjust the tension of the diaphragm material strip 11. Therefore, by controlling the supporting force of the first tension roller 121 and the second tension roller 122 in real time, the preset tension can be maintained by controlling the tension of the diaphragm material strip 11.
  • the driving component 123 can reduce the supporting force of the first tension roller 121 on the diaphragm material strip 11, thereby reducing the tensioning degree of the diaphragm material strip 11, so that the tension of the diaphragm material strip 11 is reduced and approaches the preset tension; if it is detected that the tension of the diaphragm material strip 11 is less than the preset tension, the driving component 123 can increase the supporting force of the first tension roller 121 on the diaphragm material strip 11, thereby increasing the tensioning degree of the diaphragm material strip 11, so that the tension of the diaphragm material strip 11 is increased and approaches the preset tension.
  • the driving component 123 can reduce the supporting force of the second tension roller 122 on the diaphragm material strip 11, thereby reducing the tension of the diaphragm material strip 11; If the tension of the diaphragm material strip 11 is less than the preset tension, the driving assembly 123 can increase the supporting force of the second tension roller 122 on the diaphragm material strip 11 , thereby increasing the tensioning degree of the diaphragm material strip 11 .
  • the diaphragm tension control device 100 further includes a tension sensor 130, which can detect the tension of the diaphragm material strip 11 passing through the buffer mechanism 110 and the tension holding mechanism 120.
  • the tension sensor 130 can monitor the tension of the diaphragm material strip 11 in real time, so that the driving component 123 can dynamically adjust the supporting force of the first tension roller 121 and the second tension roller 122 according to the real-time tension, so as to accurately control the tension of the diaphragm material strip 11.
  • the buffer mechanism 110 can buffer or release the diaphragm material strip 11, thereby preventing the diaphragm material strip 11 from being loosened or broken. It can be seen that with the cooperation of the buffer mechanism 110 and the tension holding mechanism 120, the tension of the diaphragm material strip 11 can be well maintained and stable during the lamination process, thereby preventing the diaphragm material strip 11 from wrinkling, shrinking, and other problems, which helps to improve the quality of the battery cell.
  • the tension maintaining mechanism 120 also includes a mounting bracket 124, a first swing arm 125 and a second swing arm 126.
  • One end of the first swing arm 125 and the second swing arm 126 are rotatably mounted on the mounting bracket 124, and the other end is respectively mounted with a first tension roller 121 and a second tension roller 122.
  • the driving component 123 transmits the supporting force to the first tension roller 121 and the second tension roller 122 through the first swing arm 125 and the second swing arm 126.
  • the mounting bracket 124 is provided with a first rotating shaft 127 and a second rotating shaft 128 which are parallel to each other, and the first swing arm 125 and the second swing arm 126 are respectively mounted on the first rotating shaft 127 and the second rotating shaft 128.
  • the first rotating shaft 127 and the second rotating shaft 128 can rotate around their own axes, so that the first swing arm 125 and the second swing arm 126 can swing.
  • the positions of the first tension roller 121 and the second tension roller 122 can also be changed under the action of the diaphragm material strip 11.
  • the reaction force of the diaphragm material strip 11 on the first tension roller 121 and the second tension roller 122 will be greater than the supporting force, thereby forcing the first tension roller 121 and the second tension roller 122 to move.
  • the tension roller 121 and the second tension roller 122 retreat to play a buffering role and prevent the isolation material strip 11 from breaking.
  • first tension roller 121 and the second tension roller 122 drive the first swing arm 125 and the second swing arm 126 to swing during the retreat process, and the movement trajectory of the first tension roller 121 and the second tension roller 122 is in an arc shape, so the friction between the first tension roller 121 and the second tension roller 122 and the diaphragm material strip 11 can also be reduced.
  • first tension roller 121 and the second tension roller 122 are rotatably mounted on the first swing arm 125 and the second swing arm 126, respectively, and can rotate around their own axes. In this way, the first tension roller 121 and the second tension roller 122 can roll along the surface of the diaphragm material strip 11 when abutting against the diaphragm material strip 11, thereby avoiding scratching the diaphragm material strip 11.
  • the driving assembly 123 includes a first driving member 1231 and a second driving member 1232 , which are respectively connected to the first swing arm 125 and the second swing arm 126 , and provide support force for the first tension roller 121 and the second tension roller 122 .
  • first driving member 1231 and the second driving member 1232 can provide supporting force for the first tension roller 121 and the second tension roller 122 respectively, the supporting force of the first tension roller 121 and the second tension roller 122 acting on the diaphragm material strip 11 can be controlled and adjusted individually, thereby improving the accuracy of tension control on the diaphragm material strip 11.
  • the first driving member 1231 and the second driving member 1232 can both be cylinders, and are controlled in real time by an electric proportional valve.
  • a control electric signal can be generated according to the real-time tension of the diaphragm material strip 11, and the electric proportional valve can control the air intake and air output of the cylinder according to the control electric signal, thereby adjusting the supporting force provided by the first driving member 1231 and the second driving member 1232 to the first tension roller 121 and the second tension roller 122 in real time to ensure that the diaphragm material strip 11 maintains a preset tension.
  • first driving member 1231 and the second driving member 1232 may also be springs, which are pre-compressed to generate a supporting force for the first tension roller 121 and the second tension roller 122.
  • the pre-compression amount of the spring can be controlled in real time to control the first tension roller 121 and the second tension roller 122.
  • the supporting force of the force roller 122 is adjusted.
  • the diaphragm tension control device 100 further includes an unwinding mechanism 140 and a tensioning mechanism 150.
  • the tensioning mechanism 150 is located between the unwinding mechanism 140 and the buffer mechanism 110.
  • the unwinding mechanism 140 can unwind the diaphragm material strip 11, and the tensioning mechanism 150 can tension the diaphragm material strip 11 between the unwinding mechanism 140 and the buffer mechanism 110.
  • the unwinding mechanism 140 may include a tensioning shaft, and the roll of the diaphragm material strip 11 may be pre-clamped on the tensioning shaft.
  • the tensioning mechanism 150 can maintain a certain tension of the diaphragm material strip 11 unwound by the unwinding mechanism 140 to ensure that the unwinding process proceeds smoothly.
  • the tensioning mechanism 150 includes a base 151, a rocker arm 152 and a tensioning roller 153.
  • One end of the rocker arm 152 is rotatably mounted on the base 151.
  • the tensioning roller 153 is mounted on an end of the rocker arm 152 away from the base 151.
  • the diaphragm material strip 11 can pass around the tensioning roller 153.
  • the rocker arm 152 may be connected to components such as a cylinder and an elastic member, thereby applying a pre-tightening force to the tensioning roller 153 so that the tensioning roller 153 tensions the diaphragm material strip 11 .
  • the diaphragm tension control device 100 also includes a tension isolation mechanism 160 located between the buffer mechanism 110 and the tensioning mechanism 150.
  • the diaphragm material strip 11 passes through the tension isolation mechanism 160, and the tension isolation mechanism 160 can isolate the tension of the diaphragm material strip 11 between the buffer mechanism 110 and the tensioning mechanism 150.
  • the tension of the diaphragm strip 11 on both sides of the tension isolation mechanism 160 may be different, and the tension isolation mechanism 160 can isolate the unwinding tension to prevent the tension fluctuation during the unwinding process from being transmitted to the isolation buffer mechanism 110 and the tension holding mechanism 120. In this way, the tension fluctuation during the unwinding process can be prevented from interfering with the diaphragm strip 11 during the lamination process, thereby further improving the stability of the tension of the diaphragm strip 11 during the lamination process.
  • the tension isolation mechanism 160 includes a main drive roller 161 and a pressure roller 162, and the diaphragm material strip 11 can pass through and be clamped between the main drive roller 161 and the pressure roller 162.
  • the main drive roller 161 can provide The driving force is used to transport the diaphragm material strip 11 to the cache mechanism 110 .
  • the two sides of the diaphragm strip 11 can be effectively separated, thereby isolating the unwinding tension. Moreover, under the driving of the main driving roller 161, the diaphragm strip 11 can be smoothly conveyed to the buffer mechanism 110, thereby continuously supplying the diaphragm strip 11 for the lamination process.
  • the diaphragm tension control device 100 generally further includes a large plate 180 .
  • the buffer mechanism 110 , the tension holding mechanism 120 , the tension sensor 130 , the unwinding mechanism 140 , the tensioning mechanism 150 , the tension interrupting mechanism 160 and other components can all be mounted on the large plate 180 .
  • the unloading mechanism 300 when transferring the pole piece 12 conveyed by the conveying mechanism 600 to the stacking platform 200 for stacking, the unloading mechanism 300 obtains the pole piece on the conveying mechanism 600 and moves toward the deflection correction platform 500, and the deflection correction platform 500 moves toward the conveying mechanism 600.
  • the pole piece 12 can be conveniently placed on the deflection correction platform 500.
  • the unloading mechanism 300 returns to its position, and the deflection correction platform 500 moves toward the stacking platform 200 while correcting the pole piece 12.
  • the stacking mechanism 400 moves toward the deflection correction platform 500.
  • the pole piece 12 on the deflection correction platform 500 can be conveniently obtained.
  • the stacking mechanism 400 places the obtained pole piece 12 on the stacking platform 200, and the deflection correction platform 500 moves toward the conveying mechanism 600 to prepare for the transfer of the next pole piece 12. It can be seen from this that the strokes of the unloading mechanism 300 and the laminating mechanism 400 can be significantly shortened, so the laminating cycle of the pole pieces 12 can be significantly accelerated, thereby improving the production efficiency of the battery cell.

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Abstract

本申请涉及一种叠片机，包括叠片台、下料机构、叠片机构、纠偏台及输送机构，纠偏台能够在叠片台与输送机构之间移动。在将极片转移至叠片台的过程中，下料机构获取输送机构上的极片并朝纠偏台移动，纠偏台则朝输送机构移动，当下料机构移动至纠偏台上方便可将极片放置于纠偏台上。接着，下料机构回位，纠偏台则在对极片进行纠偏的同时朝叠片台移动。与此同时，叠片机构朝纠偏台移动，当叠片机构移动至纠偏台上方便可获取纠偏台上的极片。叠片机构将所获取的极片放置于叠片台，纠偏台则朝输送机构移动以准备进行下一个极片的转移。由此可见，下料机构及叠片机构的行程可显著缩短，故极片的叠片节拍可显著加快，从而提升电芯的生产效率。

Description

叠片机 技术领域
本申请涉及锂电池设备技术领域，特别涉及一种叠片机。
背景技术
叠片是锂电池电芯制备的一种常见工艺，通过将正极片和负极片交替层叠于叠片台并在正极片与负极片之间设置隔膜，便可构成电池电芯。极片在来料过程中可能会发现位置偏转，故极片一般需要先由下料机械手放置于纠偏台进行纠偏，待纠偏完成后再由叠片机械手放置于叠片台。而且，由于机械手的行程较长，从而导致电芯的生产效率较低。
申请内容
基于此，有必要针对上述问题，提供一种能够提升电芯生产效率的叠片机。
一种叠片机，包括叠片台、下料机构、叠片机构、纠偏台及输送机构，所述纠偏台用于承载极片并对极片执行纠偏操作，所述输送机构用于输送极片，所述纠偏台能够在所述叠片台与所述输送机构之间移动；所述下料机构能够获取所述输送机构上的极片并将极片放置于所述纠偏台上；所述叠片机构能够获取所述纠偏台上的极片并将极片放置于所述叠片台。
在其中一个实施例中，极片包括正极片及负极片，所述输送机构设置有两个且分别输送正极片及负极片，两个所述输送机构分别位于所述叠片台的两侧，所述下料机构、所述叠片机构及所述纠偏台均设置有两个且分别与两个所述输送机构相配合。
在其中一个实施例中，还包括用于向所述叠片台输送隔膜料带的隔膜张力控制装置，所述隔膜张力控制装置能够带动隔膜料带沿第一方向往复摆动，以使隔膜料带在所述叠片台上进行Z形铺设并设置于相邻的两个极片之间。
在其中一个实施例中，所述隔膜张力控制装置包括张力保持机构，所述张力保持机构包括第一张力辊、第二张力辊及驱动组件，途经所述隔膜张力控制装置的隔膜料带能够穿过所述第一张力辊与所述第二张力辊之间；
其中，隔膜料带在沿所述第一方向往复摆动的过程中能够由所述第一张力辊及所述第二张力辊支撑，所述驱动组件能够为所述第一张力辊及所述第二张力辊提供作用于隔膜料带的支撑力，且所述驱动组件提供的支撑力可调，以将隔膜料带张紧并维持预设张力。
在其中一个实施例中，所述张力保持机构还包括安装支架、第一摆臂及第二摆臂，所述第一摆臂及所述第二摆臂的一端可转动地安装于所述安装支架，另一端分别安装有所述第一张力辊及所述第二张力辊，所述驱动组件通过所述第一摆臂及所述第二摆臂将支撑力分别传递至所述第一张力辊及所述第二张力辊。
在其中一个实施例中，所述驱动组件包括第一驱动件及第二驱动件，所述第一驱动件及所述第二驱动件分别与所述第一摆臂及所述第二摆臂连接，且分别为所述第一张力辊及所述第二张力辊提供支撑力。
在其中一个实施例中，所述隔膜张力控制装置还包括摆辊机构，所述摆辊机构设置于所述张力保持机构的下游，由所述张力保持机构输出的隔膜料带能够途经所摆辊机构，所述摆辊机构能够沿所述第一方向往复移动，并带动隔膜料带沿所述第一方向往复摆动。
在其中一个实施例中，所述隔膜张力控制装置还包括张力传感器，所述张 力传感器能够检测途经所述张力保持机构的所隔膜料带的张力。
在其中一个实施例中，所述隔膜张力控制装置还包括位于所述张力保持机构的上游侧的缓存机构，所述缓存机构能够缓存或释放所述隔膜料带。
在其中一个实施例中，所述隔膜张力控制装置还包括放卷机构及张紧机构，所述张紧机构位于所述放卷机构与所述缓存机构之间，所述放卷机构能够放卷隔膜料带，所述张紧机构能够将所述放卷机构与所述缓存机构之间的隔膜料带张紧。
在其中一个实施例中，所述张紧机构包括底座、摆杆及张紧辊，所述摆杆的一端可转动地安装于所述底座，所述张紧辊安装于所述摆杆远离所述底座的一端，隔膜料带能够绕经所述张紧辊。
在其中一个实施例中，所述隔膜张力控制装置还包括位于所述缓存机构与所述张紧机构之间的张力隔断机构，隔膜料带途经所述张力隔断机构，所述张力隔断机构能够隔断所述缓存机构与所述张紧机构之间隔膜料带的张力。
在其中一个实施例中，所述张力隔断机构包括主驱辊及压辊，隔膜料带能够穿过并夹持于所述主驱辊与所述压辊之间，所述主驱辊能够提供驱动力以将隔膜料带向所述缓存机构输送。
上述叠片机，在将输送机构输送的极片转移至叠片台进行叠片的过程中，下料机构获取输送机构上的极片并朝纠偏台移动，纠偏台则朝输送机构移动，当下料机构移动至纠偏台上方便可将极片放置于纠偏台上。接着，下料机构回位，纠偏台则在对极片进行纠偏的同时朝叠片台移动。与此同时，叠片机构朝纠偏台移动，当叠片机构移动至纠偏台上方便可获取纠偏台上的极片。叠片机构将所获取的极片放置于叠片台，纠偏台则朝输送机构移动以准备进行下一个极片的转移。由此可见，下料机构及叠片机构的行程可显著缩短，故极片的叠 片节拍可显著加快，从而提升电芯的生产效率。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请较佳实施例中叠片机的结构示意图；
图2为图1所示叠片机中隔膜张力控制装置的结构示意图；
图3为图2所示隔膜张力控制装置中张力保持机构的结构示意图；
图4为图3所示张力保持机构的俯视图。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图对本申请的具体实施方式做详细的说明。在下面的描述中阐述了很多具体细节以便于充分理解本申请。但是本申请能够以很多不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本申请内涵的情况下做类似改进，因此本申请不受下面公开的具体实施例的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指 示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
需要说明的是，当元件被称为“固定于”或“设置于”另一个元件，它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件，它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“上”、“下”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
请参阅图1，本申请较佳实施例中的叠片机10包括叠片台200、下料机构300、叠片机构400、纠偏台500及输送机构600。
输送机构600用于输送极片12。其中，极片12可以是单片极片，也可是多个单片极片与隔膜复合成的复合极片。具体在本实施例中，极片12为单片极片，且包括正极片及负极片。
纠偏台500用于承载极片12并对极片12执行纠偏操作。具体的，纠偏台500可以带动所承载的极片12进行平移及旋转，从而对极片12的位置及角度进行调节。纠偏台500上一般还包括有纠偏相机(图未示)，纠偏相机用于获取极片12的图像信息以判断极片12是否存在偏移。
下料机构300能够获取输送机构600上的极片12并将极片12放置于纠偏台500上。待纠偏台500对极片12完成纠偏后，叠片机构400能够获取纠偏台500上的极片12并将极片12放置于叠片台200上。叠片台200用于承载隔膜及极片12，待叠片台200上堆叠所需层数的极片12后便可得到电芯。
进一步的，纠偏台500能够在叠片台200与输送机构600之间移动。具体的，在输送机构600与叠片台200之间可设置导轨，纠偏台500则安装于上述导轨并能够沿导轨往复滑动，以使纠偏台500能够在叠片台200与输送机构600之间往复移动。
在下料机构30将输送机构600上的极片12转移至纠偏台500时，纠偏台500朝输送机构600移动，下料机构300则在获取输送机构600上的极片12后朝纠偏台500移动；当下料机构300移动至纠偏台500上方时，便可将极片12放置于纠偏台500上。待下料机构300放下极片12后，下料机构300则回位并准备获取下一个极片12。可见，在将极片12转移至纠偏台500的过程中，由于纠偏台500及下料机构300相向移动，故能够减小下料机构300的行程。
极片12转移至纠偏台500后，由纠偏台500对极片12进行纠偏。与此同时，纠偏台200将调转方向并朝叠片台200移动，叠片机构400则同时朝纠偏台200移动。当叠片机构400移动至纠偏台500上方时，便可获取纠偏台500上完成纠偏的极片12。叠片机构400在获取极片12后向叠片台200移动，并将极片12放置于叠片台200上。而纠偏台500则再次调转方向并朝输送机构600移动，以准备承接下一个极片12。可见，在将极片12转移至叠片台200的过程中，由于纠偏台500及叠片机构400相向移动，故还能够减小叠片机构400的行程。
依此循环，随着纠偏台500在输送机构600与叠片台200之间往复移动，多个极片12将依次转移至叠片台200上进行堆叠，从而制得电芯。而且，由于下料机构300及叠片机构400在叠片过程中的行程均可显著缩短，故下料机构300及叠片机构400的节拍可显著加快，从而使电芯的生产效率得以提升。
在本实施例中，输送机构600设置有两个且分别输送正极片及负极片，两个输送机构600分别位于叠片台200的两侧，下料机构300、叠片机构400及纠偏台500均设置有两个且分别与两个输送机构600相配合。
以图1所示为例，两个输送机构600分别位于叠片台200的左右两侧，左侧的输送机构600用于输送正极片，右侧的输送机构600用于输送负极片。与左侧的输送机构600相配合的下料机构300可先将正极片转移至左侧的纠偏台500，再由左侧的叠片机构400将正极片由纠偏台500转移至叠片台200上。与右侧的输送机构600相配合的下料机构300可先将负极片转移至右侧的纠偏台500，再由右侧的叠片机构400将负极片由纠偏台500转移至叠片台200上。
两个叠片结构400交替向叠片台200上放置极片20。如此，便可将正极片与负极片交替堆叠在叠片台200上以制得电芯。而且，由于正极片与负极片彼 此独立进行输送及转移，且分别由不同的机构完成，故可以有效避免将正极片与负极片混淆。
需要指出的是，在其他实施例中，也可仅设置一组下料机构300、叠片机构400、纠偏台500及输送机构600对正极片及负极片进行输送及转移。此时，正极片及负极片可预先在输送机构600上交替排列，输送机构600便可将正极片及负极片交替输送至能够被下料机构300获取的位置，从而被交替放置于叠片台200上。
叠片台200上正极片与负极片交替层叠，且相邻的两个极片12之间由隔膜隔开。此外，在本实施例中，叠片机100还包括用于向叠片台200输送隔膜料带11的隔膜张力控制装置100，隔膜张力控制装置100能够带动隔膜料带11沿第一方向往复摆动，以使隔膜料带11在叠片台200上进行Z形铺设并设置于相邻的两个极片12之间。
在隔膜料带11进行Z形铺设的同时，叠片机构400能够将正极片和负极片交替放置于叠片台200上，且每放置一个极片12隔膜料带11便折叠一次，从而使得相邻极片12之间由隔膜隔开；重复上述操作，直至堆叠的极片12达到所需层数便可完成一个电芯的制备，而铺设于叠片台200的隔膜料带11则折叠成“Z”字型。
采用Z形折叠的方式设置隔膜，能够提升加工效率。需要指出的是，在其他实施例中，也可将隔膜裁切成隔膜片料，且每放置一个极片12便在其上放置一层隔膜片料，也可使得相邻两个极片12之间由隔膜隔开。
请一并参阅图2，在本实施例中，隔膜张力控制装置100包括缓存机构110及张力保持机构120。
用于叠片的隔膜料带11能够依次途经缓存机构110及张力保持机构120。 其中，缓存机构110能够缓存或释放隔膜料带11。缓存机构110一般包括多个缓存辊111，且多个缓存辊111之间的相对位置可变。途经缓存机构110的隔膜料带11能够依次绕经多个缓存辊111，且多个缓存辊111通过相对位置的变动，便可对隔膜料带11实现缓存或释放。
隔膜料带11出现冗余时，缓存机构110可对冗余的隔膜料带11进行缓存；而当隔膜料带11出现短缺时，缓存机构110可通过释放隔膜料带11以弥补短缺。如此，可防止隔膜料带11出现松弛或绷断的现象。显然，在其他实施例中，若隔膜料带11在实际工作过程中的波动较小，则缓存机构110也可省略。
请一并参阅图3及图4，张力保持机构120包括第一张力辊121、第二张力辊及驱动组件123。其中，途经张力保持机构120的隔膜料带11能够穿过第一张力辊121与第二张力辊122之间。
叠片过程中，隔膜料带11由张力保持机构120输出后在叠片台200上进行Z形铺设。此时，隔膜料带11相对于叠片台200沿第一方向往复摆动，并在第一张力辊121及第二张力辊122之间沿第一方向往复摆动。而且，隔膜料带11沿第一方向往复摆动的过程中，能够由第一张力辊121及第二张力辊122进行支撑，从而将隔膜料带11张紧。
在本实施例中，隔膜张力控制装置100还包括摆辊机构170，摆辊机构170设置于张力保持机构120的下游，由张力保持机构120输出的隔膜料带11能够途经摆辊机构170，摆辊机构170能够沿第一方向往复移动，并带动隔膜料带11沿第一方向往复摆动。
具体的，摆辊机构170一般包括两个相对设置的夹辊，由张力保持机构120输出的隔膜料带11穿过两个夹辊之间。随着摆辊机构170沿第一方向往复移动，便可带动隔膜料带11沿第一方向往复摆动并实现Z形折叠。
进一步的，驱动组件123能够为第一张力辊121及第二张力辊122提供作用于隔膜料带11的支撑力，且驱动组件123提供的支撑力可调，以将隔膜料带11张紧并维持预设张力。当隔膜料带11向第一张力辊121摆动时，可由第一张力辊121与隔膜料带11抵接并将其张紧；当隔膜料带11向第二张力辊122摆动时，可由第二张力辊122与隔膜料带11抵接并将其张紧。
以图2所示为例，第一方向指的是左右方向。第一张力辊121位于左侧而第二张力辊122位于右侧，隔膜料带11在叠片过程中左右摆动。当隔膜料带11摆动至左侧时，可由第一张力辊121与隔膜料带11抵接并将其张紧；当隔膜料带11摆动至右侧时，可由第二张力辊122与隔膜料带11抵接并将其张紧。而且，第一张力辊121及第二张力辊122能够在驱动组件123的驱动下移动，从而对隔膜料带11的张紧程度进行调节。因此，通过实时控制第一张力辊121及第二张力辊122的支撑力，便可通过控制隔膜料带11的张紧程度以维持预设张力。
更具体的，当隔膜料带11摆动至左侧并由第一张力辊121进行张紧时，若检测到隔膜料带11的张力大于预设张力，则可由驱动组件123减小第一张力辊121作用于隔膜料带11的支撑力，从而降低对隔膜料带11的张紧程度，使得隔膜料带11的张力减小并趋近于预设张力；若检测到隔膜料带11的张力小于预设张力，则可由驱动组件123增大第一张力辊121作用于隔膜料带11的支撑力，从而提升对隔膜料带11的张紧程度，使得隔膜料带11的张力增大并趋近于预设张力。
同样的，当隔膜料带11摆动至右侧并由第二张力辊122进行张紧时，若检测到隔膜料带11的张力大于预设张力，则可由驱动组件123减小第二张力辊122作用于隔膜料带11的支撑力，从而降低对隔膜料带11的张紧程度；而检测到 隔膜料带11的张力小于预设张力，则可由驱动组件123增大第二张力辊122作用于隔膜料带11的支撑力，从而提升对隔膜料带11的张紧程度。
具体在本实施例中，隔膜张力控制装置100还包括张力传感器130，张力传感器130能够检测途经缓存机构110及张力保持机构120的隔膜料带11的张力。张力传感器130能够对隔膜料带11的张力进行实时监测，从而方便驱动组件123根据实时张力动态调节第一张力辊121及第二张力辊122的支撑力，以对隔膜料带11的张力进行精确控制。
而且，隔膜料带11在摆动过程中出现冗余或短缺时，缓存机构110可对隔膜料带11进行缓存或释放，从而避免隔膜料带11出现松弛或崩断。可见，在缓存机构110及张力保持机构120的配合下，隔膜料带11的张力能够在叠片过程中较好地维持稳定，从而避免隔膜料带11出现褶皱、内缩等问题，有助于提升电芯品质。
在本实施例中，张力保持机构120还包括安装支架124、第一摆臂125及第二摆臂126，第一摆臂125及第二摆臂126的一端可转动地安装于安装支架124，另一端分别安装有第一张力辊121及第二张力辊122，驱动组件123通过第一摆臂125及第二摆臂126将支撑力分别传递至第一张力辊121及第二张力辊122。
具体的，安装支架124上设置有相互平行的第一转轴127及第二转轴128，第一摆臂125及第二摆臂126分别安装于第一转轴127及第二转轴128上。第一转轴127及第二转轴128能够绕自身轴线旋转，从而使得第一摆臂125及第二摆臂126能够实现摆动。
如此，第一张力辊121及第二张力辊122的位置也能够在隔膜料带11的作用下进行变化。譬如，当隔离料带11的张力突然增大时，隔膜料带11作用于第一张力辊121及第二张力辊122的反作用力将会大于支撑力，从而迫使第一 张力辊121及第二张力辊122回退，以起到缓冲作用并避免隔离料带11崩断。而且，第一张力辊121及第二张力辊122回退的过程中带动第一摆臂125及第二摆臂126摆动，第一张力辊121及第二张力辊122的移动轨迹呈圆弧形，故还能够减小第一张力辊121及第二张力辊122与隔膜料带11之间的摩擦力。
具体在本实施例中，第一张力辊121及第二张力辊122分别可转动地安装于第一摆臂125及第二摆臂126，并能够绕自身轴线旋转。如此，第一张力辊121及第二张力辊122在抵持隔膜料带11时能够沿隔膜料带11的表面滚动，从而避免划伤隔膜料带11。
进一步的，在本实施例中，驱动组件123包括第一驱动件1231及第二驱动件1232，第一驱动件1231及第二驱动件1232分别与第一摆臂125及第二摆臂126连接，且分别为第一张力辊121及第二张力辊122提供支撑力。
由于第一驱动件1231及第二驱动件1232能够分别为第一张力辊121及第二张力辊122提供支撑力，故针对第一张力辊121及第二张力辊122作用于隔膜料带11的支撑力能单独进行控制调整，从而能够提升针对隔膜料带11进行张力控制的精度。
具体的，第一驱动件1231及第二驱动件1232均可采用气缸，并由电气比例阀实时控制。根据隔膜料带11的实时张力可生成控制电信号，电气比例阀能够根据该控制电信号控制气缸的进气量及出气量，从而对第一驱动件1231及第二驱动件1232提供给第一张力辊121及第二张力辊122的支撑力进行实时调节，以确保隔膜料带11维持预设张力。
需要指出的是，在其他实施例中，第一驱动件1231及第二驱动件1232也可采用弹簧，弹簧通过预压缩产生提供给第一张力辊121及第二张力辊122的支撑力。而且，通过实时控制弹簧的预压缩量便可对第一张力辊121及第二张 力辊122的支撑力进行调节。
请再次参阅图2，在本实施例中，隔膜张力控制装置100还包括放卷机构140及张紧机构150，张紧机构150位于放卷机构140与缓存机构110之间。其中，放卷机构140能够放卷隔膜料带11，张紧机构150能够将放卷机构140与缓存机构110之间的隔膜料带11张紧。
放卷机构140可以包括涨紧轴，隔膜料带11的料卷可预先装夹于涨紧轴上。张紧机构150能够使放卷机构140放卷出的隔膜料带11维持一定张力，以保证放卷过程顺利进行。
进一步的，在本实施例中，张紧机构150包括底座151、摆杆152及张紧辊153，摆杆152的一端可转动地安装于底座151，张紧辊153安装于摆杆152远离底座151的一端，隔膜料带11能够绕经张紧辊153。
摆杆152可与气缸、弹性件等元件连接，从而对张紧辊153施加预紧力，以使张紧辊153将隔膜料带11张紧。
在本实施例中，隔膜张力控制装置100还包括位于缓存机构110与张紧机构150之间的张力隔断机构160，隔膜料带11途经张力隔断机构160，张力隔断机构160能够隔断缓存机构110与张紧机构150之间隔膜料带11的张力。
也就是说，隔膜料带11位于张力隔断机构160两侧的张力可以存在差异，张力隔断机构160能够隔断放卷张力，防止放卷过程中的张力波动传递至隔断缓存机构110及张力保持机构120内。如此，可避免放卷过程中的张力波动对叠片过程中的隔膜料带11造成干扰，从而能够进一步提升隔膜料带11在叠片过程中的张力的稳定性。
具体的，在本实施例中，张力隔断机构160包括主驱辊161及压辊162，隔膜料带11能够穿过并夹持于主驱辊161与压辊162之间，主驱辊161能够提供 驱动力以将隔膜料带11向缓存机构110输送。
在主驱辊161与压辊162的夹持下，能够将隔膜料带11两侧有效隔开，从而隔断放卷张力。而且，在主驱辊161的驱使下，可使隔膜料带11顺利向缓存机构110输送，从而为叠片过程持续供应隔膜料带11。
此外，隔膜张力控制装置100一般还包括大板180。缓存机构110、张力保持机构120、张力传感器130、放卷机构140、张紧机构150及张力隔断机构160等元件均可安装于大板180上。
上述叠片机10，在将输送机构600输送的极片12转移至叠片台200进行叠片的过程中，下料机构300获取输送机构600上的极片并朝纠偏台500移动，纠偏台500则朝输送机构600移动，当下料机构300移动至纠偏台500上方便可将极片12放置于纠偏台500上。接着，下料机构300回位，纠偏台500则在对极片12进行纠偏的同时朝叠片台200移动。与此同时，叠片机构400朝纠偏台500移动，当叠片机构400移动至纠偏台500上方便可获取纠偏台500上的极片12。叠片机构400将所获取的极片12放置于叠片台200，纠偏台500则朝输送机构600移动以准备进行下一个极片12的转移。由此可见，下料机构300及叠片机构400的行程可显著缩短，故极片12的叠片节拍可显著加快，从而提升电芯的生产效率。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对申请专利范围的限制。应当指出的是，对于本领域的 普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (13)

  1. 一种叠片机，包括叠片台、下料机构、叠片机构、纠偏台及输送机构，所述纠偏台用于承载极片并对极片执行纠偏操作，所述输送机构用于输送极片，其特征在于，所述纠偏台能够在所述叠片台与所述输送机构之间移动；所述下料机构能够获取所述输送机构上的极片并将极片放置于所述纠偏台上；所述叠片机构能够获取所述纠偏台上的极片并将极片放置于所述叠片台。
  2. 根据权利要求1所述的叠片机，其特征在于，极片包括正极片及负极片，所述输送机构设置有两个且分别输送正极片及负极片，两个所述输送机构分别位于所述叠片台的两侧，所述下料机构、所述叠片机构及所述纠偏台均设置有两个且分别与两个所述输送机构相配合。
  3. 根据权利要求1所述的叠片机，其特征在于，还包括用于向所述叠片台输送隔膜料带的隔膜张力控制装置，所述隔膜张力控制装置能够带动隔膜料带沿第一方向往复摆动，以使隔膜料带在所述叠片台上进行Z形铺设并设置于相邻的两个极片之间。
  4. 根据权利要求3所述的叠片机，其特征在于，所述隔膜张力控制装置包括张力保持机构，所述张力保持机构包括第一张力辊、第二张力辊及驱动组件，途经所述隔膜张力控制装置的隔膜料带能够穿过所述第一张力辊与所述第二张力辊之间；
    其中，隔膜料带在沿所述第一方向往复摆动的过程中能够由所述第一张力辊及所述第二张力辊支撑，所述驱动组件能够为所述第一张力辊及所述第二张力辊提供作用于隔膜料带的支撑力，且所述驱动组件提供的支撑力可调，以将隔膜料带张紧并维持预设张力。
  5. 根据权利要求4所述的叠片机，其特征在于，所述张力保持机构还包括安装支架、第一摆臂及第二摆臂，所述第一摆臂及所述第二摆臂的一端可转动 地安装于所述安装支架，另一端分别安装有所述第一张力辊及所述第二张力辊，所述驱动组件通过所述第一摆臂及所述第二摆臂将支撑力分别传递至所述第一张力辊及所述第二张力辊。
  6. 根据权利要求5所述的叠片机，其特征在于，所述驱动组件包括第一驱动件及第二驱动件，所述第一驱动件及所述第二驱动件分别与所述第一摆臂及所述第二摆臂连接，且分别为所述第一张力辊及所述第二张力辊提供支撑力。
  7. 根据权利要求4所述的叠片机，其特征在于，所述隔膜张力控制装置还包括摆辊机构，所述摆辊机构设置于所述张力保持机构的下游，由所述张力保持机构输出的隔膜料带能够途经所摆辊机构，所述摆辊机构能够沿所述第一方向往复移动，并带动隔膜料带沿所述第一方向往复摆动。
  8. 根据权利要求4所述的叠片机，其特征在于，所述隔膜张力控制装置还包括张力传感器，所述张力传感器能够检测途经所述张力保持机构的所隔膜料带的张力。
  9. 根据权利要求4至8任一项所述的叠片机，其特征在于，所述隔膜张力控制装置还包括位于所述张力保持机构的上游侧的缓存机构，所述缓存机构能够缓存或释放所述隔膜料带。
  10. 根据权利要求9所述的叠片机，其特征在于，所述隔膜张力控制装置还包括放卷机构及张紧机构，所述张紧机构位于所述放卷机构与所述缓存机构之间，所述放卷机构能够放卷隔膜料带，所述张紧机构能够将所述放卷机构与所述缓存机构之间的隔膜料带张紧。
  11. 根据权利要求10所述的叠片机，其特征在于，所述张紧机构包括底座、摆杆及张紧辊，所述摆杆的一端可转动地安装于所述底座，所述张紧辊安装于所述摆杆远离所述底座的一端，隔膜料带能够绕经所述张紧辊。
  12. 根据权利要求10所述的叠片机，其特征在于，所述隔膜张力控制装置还包括位于所述缓存机构与所述张紧机构之间的张力隔断机构，隔膜料带途经所述张力隔断机构，所述张力隔断机构能够隔断所述缓存机构与所述张紧机构之间隔膜料带的张力。
  13. 根据权利要求12所述的叠片机，其特征在于，所述张力隔断机构包括主驱辊及压辊，隔膜料带能够穿过并夹持于所述主驱辊与所述压辊之间，所述主驱辊能够提供驱动力以将隔膜料带向所述缓存机构输送。
PCT/CN2024/070395 2023-11-27 2024-01-03 叠片机 Pending WO2025112171A1 (zh)

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