WO2024114552A2 - 一种锂电池切叠装置 - Google Patents

一种锂电池切叠装置 Download PDF

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Publication number
WO2024114552A2
WO2024114552A2 PCT/CN2023/134196 CN2023134196W WO2024114552A2 WO 2024114552 A2 WO2024114552 A2 WO 2024114552A2 CN 2023134196 W CN2023134196 W CN 2023134196W WO 2024114552 A2 WO2024114552 A2 WO 2024114552A2
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WO
WIPO (PCT)
Prior art keywords
cutting
stacking
clamping mechanism
control system
central control
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Application number
PCT/CN2023/134196
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English (en)
French (fr)
Inventor
黄世祥
鄢计雄
Original Assignee
深圳与行智能装备有限公司
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Publication of WO2024114552A2 publication Critical patent/WO2024114552A2/zh

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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
    • 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 field of battery processing technology, and in particular to a lithium battery cutting and stacking device.
  • the cutting and stacking machines in the process of forming bare lithium battery cells all adopt multiple stacking stations (collectively referred to as: two-cut three-stack or two-cut four-stack), which results in the disadvantages of large equipment space, high manufacturing cost, complex structure, low utilization rate, etc.
  • the production process of conventional Z-shaped cutting and stacking machines requires multiple sections of belts to convey products. Since the belts are recycled for a long time and the surface is in contact with the product for a long time, the belts are easily contaminated and difficult to clean, which can easily cause product damage and secondary pollution during the product conveying process.
  • Cida patent publication number, CN107768730A discloses a lithium battery pole piece stacking device, a pole piece box is provided with a plurality of equally spaced box baffles, and the battery pole pieces are inserted between the box baffles; a pole piece grabbing manipulator is connected to a lifting device, the lifting device is connected to a lateral moving device, and the lateral moving device is installed on a frame; bracket grooves are provided on both sides of the diaphragm bracket; a plurality of diaphragm support rods are provided, one end of the diaphragm support rod passes through the bracket groove and is connected to a diaphragm support rod positioning device, and the diaphragm support rod positioning device is movably connected to a diaphragm tightening device; the diaphragm is staggered and tightened at the other end of the diaphragm support rod to form a Z shape, forming a plurality of pole piece grooves; the battery cell grabbing manipulator is connected to
  • a lithium battery cutting and stacking device is provided.
  • the present invention provides a lithium battery cutting and stacking device, comprising:
  • a stacking table is used to hold stacked battery pole pieces.
  • a plurality of stacking tables are provided to alternately carry and transport the battery pole pieces.
  • a driving roller used for conveying battery pole pieces, the driving roller is divided into a first driving roller and a second driving roller, which are respectively arranged on the left and right sides of the lamination platform, wherein the first driving roller is located on the left side of the lamination platform and is used for conveying negative pole pieces, and the second driving roller is located on the right side of the lamination platform and is used for conveying positive pole pieces;
  • a cutting and clamping mechanism used for cutting, clamping and conveying the battery pole piece conveyed by the driving roller, the cutting and clamping mechanism is divided into a first cutting and clamping mechanism and a second cutting and clamping mechanism, the first cutting and clamping mechanism is used for cutting the negative pole piece and clamping and conveying the cut pole piece, the second cutting and clamping mechanism is used for cutting the positive pole piece and clamping and conveying the cut pole piece; the cutting and clamping mechanism can convey the cut battery pole piece to the lamination table;
  • a diaphragm swing roller which is arranged above the lamination table and is used to coat the battery pole pieces on the lamination table, and the diaphragm swing roller can swing left and right;
  • the membrane buffer roller mechanism is used to buffer and adjust the film on the membrane swing roller, thereby increasing the buffering effect of the membrane movement driven by the membrane swing roller;
  • a detection device which is arranged above the cutting and clamping mechanism, and is used to detect the cutting and stacking of the battery pole pieces.
  • the detection device is divided into a first detection device and a second detection device.
  • the first detection device is used to detect the cutting of the negative pole piece
  • the second detection device is used to detect the cutting of the positive pole piece.
  • the central control system is connected to the driving roller, each cutting and clamping mechanism, each diaphragm swing roller, each stacking platform, and each detection device, and controls the operation of each component; when the lithium battery cutting and stacking device is running, the diaphragm swing roller lays a layer of bottom film on the stacking platform, the first cutting and clamping mechanism cuts the negative electrode sheet and clamps and transports the cut electrode sheet to the bottom film on the stacking platform, the first cutting and clamping mechanism retreats, and while the first cutting and clamping mechanism transports the negative electrode sheet, the diaphragm swing roller and The first cutting and clamping mechanism moves in the same direction to coat the negative electrode sheet; during the retreat of the first cutting and clamping mechanism, the second cutting and clamping mechanism cuts the positive electrode sheet and clamps and transports the cut electrode sheet to the diaphragm on the negative electrode sheet on the stacking table.
  • the diaphragm swing roller moves in the same direction as the second cutting and clamping mechanism to coat the positive electrode sheet; the first cutting and clamping mechanism and the second cutting and clamping mechanism operate alternately to clamp and transport the cut electrode sheet to the stacking table, and the diaphragm swing roller performs a Z-shaped reciprocating motion with the operation of the first cutting and clamping mechanism and the second cutting and clamping mechanism until the number of stacked electrode sheet layers meets the requirements, and the central control system controls the stacking table to work alternately to transport the stacked battery electrode sheets; the central control system determines the length of the electrode slices detected by the first detection device and the second detection device, adjusts the running speed of the driving roller, and adjusts the movement stroke of the cutting and clamping mechanism according to the slice stacking conditions detected by the first detection device and the second detection device to ensure the processing speed of battery cutting and stacking.
  • FIG. 1 is a schematic structural diagram of a lithium battery cutting and stacking device according to an embodiment of the present invention.
  • FIG. 2 is a partial enlarged view of a lithium battery cutting and stacking device according to an embodiment of the present invention.
  • FIG. 3 is a schematic three-dimensional diagram of the structure of a lithium battery cutting and stacking device according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a cutting unit in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a clamp in an embodiment of the present invention.
  • the terms “installed”, “connected”, and “connected” 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • installed 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components.
  • the present invention provides a lithium battery cutting and stacking device, comprising:
  • a stacking table is used to hold stacked battery pole pieces.
  • a plurality of stacking tables are provided to alternately carry and transport the battery pole pieces.
  • a driving roller used for conveying battery pole pieces, the driving roller is divided into a first driving roller and a second driving roller, which are respectively arranged on the left and right sides of the lamination platform, wherein the first driving roller is located on the left side of the lamination platform and is used for conveying negative pole pieces, and the second driving roller is located on the right side of the lamination platform and is used for conveying positive pole pieces;
  • a cutting and clamping mechanism used for cutting, clamping and conveying the battery pole piece conveyed by the driving roller, the cutting and clamping mechanism is divided into a first cutting and clamping mechanism and a second cutting and clamping mechanism, the first cutting and clamping mechanism is used for cutting the negative pole piece and clamping and conveying the cut pole piece, the second cutting and clamping mechanism is used for cutting the positive pole piece and clamping and conveying the cut pole piece; the cutting and clamping mechanism can convey the cut battery pole piece to the lamination table;
  • a diaphragm swing roller which is arranged above the lamination table and is used to coat the battery pole pieces on the lamination table, and the diaphragm swing roller can swing left and right;
  • the membrane buffer roller mechanism is used to buffer and adjust the film on the membrane swing roller, thereby increasing the buffering effect of the membrane movement driven by the membrane swing roller;
  • a detection device which is arranged above the cutting and clamping mechanism, and is used to detect the cutting and stacking of the battery pole pieces.
  • the detection device is divided into a first detection device and a second detection device.
  • the first detection device is used to detect the cutting of the negative pole piece
  • the second detection device is used to detect the cutting of the positive pole piece.
  • the central control system is respectively connected with the driving roller, each cutting and clamping mechanism, each diaphragm swing roller, each stacking platform, and each detection device, and controls the operation of each component; when the lithium battery cutting and stacking device is in operation, the diaphragm swing roller lays a layer of base film on the stacking platform, the first cutting and clamping mechanism cuts the negative electrode sheet and clamps and transports the cut electrode sheet to the base film on the stacking platform, the first cutting and clamping mechanism retreats, and while the first cutting and clamping mechanism transports the negative electrode sheet, the diaphragm swing roller moves in the same direction as the first cutting and clamping mechanism to coat the negative electrode sheet; during the retreat of the first cutting and clamping mechanism, the second cutting and clamping mechanism cuts the positive electrode sheet and clamps and transports the cut electrode sheet to the diaphragm on the negative electrode sheet on the stacking platform, and When the first and second cutting and clamping mechanisms are in operation, the diaphragm swing roller and the second cutting and clamping mechanism move in the same
  • the central control system is provided with a standard length Lz of the electrode slices.
  • the first detection device detects the length of the electrode slices cut by the first cutting and clamping mechanism in real time
  • the second detection device detects the length of the electrode slices cut by the second cutting and clamping mechanism in real time, and transmits the detection results to the central control system;
  • the central control system is provided with a pole piece length deviation value Lp.
  • the pole piece length detected by the i-th detection device is L, i is one of 1 and 2.
  • the central control system compares the absolute value Lq of the difference with the pole piece length deviation value Lp.
  • the central control system determines that the length of the cut pole piece is within a reasonable range
  • the central control system determines that the length of the cut pole piece is not within a reasonable range, and the central control system adjusts the rotation speed of the i-th driving roller.
  • the initial operating speed of the i-th driving roller is V.
  • the central control system determines that the length of the pole piece cut by the i-th cutting and clamping mechanism is shorter than the required length, and the central control system increases the rotation speed of the i-th driving roller.
  • the initial operating speed of the i-th driving roller is V.
  • the central control system determines that the length of the pole piece cut by the i-th cutting and clamping mechanism is longer than the required length, and the central control system reduces the rotation speed of the i-th driving roller.
  • the i-th detection device continues to detect the length of the cut pole piece as L’, and calculates the absolute value Lq’ of the difference between the pole piece length L’ and the standard length Lz of the electrode slice.
  • Lq’ ⁇ Lp the central control system controls the stacking table to alternate and remove the pole pieces with unqualified lengths.
  • the first detection device and the second detection device detect the stacking state of the pole piece on the stacking table
  • the lithium battery cutting and stacking device is capable of single-piece stacking and multi-piece stacking.
  • the first detection device and the second detection device detect the vertical overlap of the stacked battery pole pieces;
  • the first detection device and the second detection device first detect the horizontal spacing of the stacked battery pole pieces, and then detect the vertical overlap of the stacked battery pole pieces.
  • the first detection device and the second detection device detect the vertical overlap C of the stacked battery pole pieces, and transmit the detection results to the central control system, in which an overlap evaluation value Cz is set.
  • the central control system compares the overlap evaluation value Cz with the overlap C.
  • the central control system determines that the overlap of the battery electrodes meets the standard, and the central control system controls the lithium battery cutting and stacking device to perform continuous slicing and stacking production.
  • the central control system determines that the overlap of the battery pole pieces does not meet the standard, and the central control system controls the cutting and clamping mechanism to adjust the operating stroke to ensure the overlap of the battery pole pieces.
  • the central control system is provided with a standard distance Dz1 from the left edge of the negative pole piece to the left edge of the stacking platform, and a standard distance Dz2 from the left edge of the right pole piece to the right edge of the stacking platform;
  • the first detection device detects the distance D1 from the left edge of the negative electrode electrode on the stacking platform to the left edge of the stacking platform
  • the second detection device detects the distance D2 from the right edge of the positive electrode electrode on the stacking platform to the right edge of the stacking platform.
  • , P2
  • the central control system determines that the deviation position of the negative electrode sheet is greater than the deviation position of the positive electrode sheet, and the central control system adjusts the movement stroke of the first cutting and clamping mechanism with the right edge position of the positive electrode sheet as the reference point;
  • the central control system determines that the deviation position of the negative pole piece is smaller than the deviation position of the positive pole piece, and the central control system adjusts the movement stroke of the second cutting and clamping mechanism based on the left edge position of the negative pole piece as a reference point.
  • the first detection device detects the horizontal distance K1 between the negative electrode sheets
  • the second detection device detects the horizontal distance K2 between the positive electrode sheets.
  • the central control system adjusts the first cutting and clamping mechanism and the second cutting and clamping mechanism according to the horizontal distance K1 and the horizontal distance K2 to ensure that the horizontal distance between the negative electrode sheets is the same as the horizontal distance between the positive electrode sheets.
  • the first detection device and the second detection device detect the vertical overlap of the stacked battery sheets, and the central control system determines the overlap.
  • the central control system determines that the overlap of the battery sheets does not meet the standard
  • the first detection device detects the distance value from the left edge of the leftmost negative electrode sheet on the stacking platform to the left edge of the stacking platform
  • the second detection device detects the distance value from the right edge of the rightmost positive electrode sheet on the stacking platform to the right edge of the stacking platform. According to each distance value, the stroke of the first cutting and clamping mechanism or the second cutting and clamping mechanism is adjusted so that the overlap of the battery sheets meets the standard.
  • the cutting and clamping mechanism includes a cutting unit and a follow-up clamping unit, wherein the cutting unit is used to cut the battery pole pieces, and the follow-up clamping unit is used to clamp the cut pole pieces and transport them to the lamination table.
  • the present invention discloses a lithium battery cutting and stacking device, comprising:
  • the stacking table 4 is used to hold the stacked battery pole pieces.
  • a plurality of stacking tables 4 are provided to alternately carry and transport the battery pole pieces.
  • a cutting and clamping mechanism used for cutting, clamping and conveying the battery pole piece conveyed by the driving roller, the cutting and clamping mechanism is divided into a first cutting and clamping mechanism 2 and a second cutting and clamping mechanism 6, the first cutting and clamping mechanism 2 is used for cutting the negative pole piece and clamping and conveying the cut pole piece, the second cutting and clamping mechanism 6 is used for cutting the positive pole piece and clamping and conveying the cut pole piece; the cutting and clamping mechanism can convey the cut battery pole piece to the lamination table 4;
  • a diaphragm swing roller 9 is arranged above the lamination platform 4 and is used to coat the battery pole pieces on the lamination platform 4.
  • the diaphragm swing roller 9 can swing left and right;
  • the membrane buffer roller mechanism 10 is used to buffer and adjust the film on the membrane swing roller 9, thereby increasing the buffering effect of the membrane swing roller driving the membrane movement.
  • the membrane buffer roller mechanism 10 is provided with a floating roller 101 and a membrane linear buffer 102. When the membrane swing roller 9 moves left and right, the position of the floating roller 101 changes, and cooperates with the membrane linear buffer 102 to stabilize the tension of the film on the membrane swing roller 9.
  • a detection device which is arranged above the cutting and clamping mechanism, and is used to detect the cutting and stacking of the battery pole pieces.
  • the detection device is divided into a first detection device 3 and a second detection device 5.
  • the first detection device 3 is used to detect the cutting of the negative pole piece
  • the second detection device 5 is used to detect the cutting of the positive pole piece;
  • the central control system is connected to the driving roller, each cutting and clamping mechanism, each diaphragm swing roller, each stacking platform, and each detection device, and controls the operation of each component; when the lithium battery cutting and stacking device is in operation, the diaphragm swing roller lays a layer of base film on the stacking platform, the first cutting and clamping mechanism cuts the negative electrode sheet and clamps and transports the cut electrode sheet to the base film on the stacking platform, the first cutting and clamping mechanism retreats, and while the first cutting and clamping mechanism transports the negative electrode sheet, the diaphragm swing roller moves in the same direction as the first cutting and clamping mechanism to coat the negative electrode sheet; during the retreat of the first cutting and clamping mechanism, the second cutting and clamping mechanism cuts the positive electrode sheet and clamps the cut electrode sheet The diaphragm swing roller is taken and transported to the film above the negative electrode sheet on the stacking table.
  • the diaphragm swing roller moves in the same direction as the second cutting and clamping mechanism to coat the positive electrode sheet; the first cutting and clamping mechanism and the second cutting and clamping mechanism operate alternately to clamp and transport the cut electrode sheet to the stacking table, and the diaphragm swing roller performs a Z-shaped reciprocating motion with the operation of the first cutting and clamping mechanism and the second cutting and clamping mechanism until the number of stacked electrode sheets meets the requirements, and the central control system controls the stacking table to work alternately to transport the stacked battery electrode sheets; the central control system determines the length of the electrode slices detected by the first detection device and the second detection device, adjusts the running speed of the driving roller, and adjusts the movement stroke of the cutting and clamping mechanism according to the slice stacking conditions detected by the first detection device and the second detection device to ensure the processing speed of battery cutting and stacking.
  • two stacking stations are provided, and each is equipped with a set of diaphragm swing rollers, so there is no need to wait when the stacking stations are alternated.
  • the present invention saves the space occupied by the equipment by arranging two sets of mechanisms for left-right inserted stacking.
  • the diaphragm on the diaphragm swinging roller can be pushed, and no diaphragm pulling device is required, thus saving a working unit.
  • the operating speed of the driving roller is adjusted by detecting the length of the slice, and no manual control is required, thus shortening the pre-operation debugging time of the equipment and accelerating the production efficiency of the equipment.
  • the operating stroke of the cutting and clamping mechanism can be adjusted according to the stacking situation of the pole pieces, thereby improving the qualified rate of the product.
  • the diaphragm swing roller 9 lays a layer of bottom film on the stacking platform 4, the first cutting and clamping mechanism 2 cuts the negative electrode sheet and clamps and transports the cut electrode sheet to the bottom film on the stacking platform 4, the first cutting and clamping mechanism 2 retreats, and the diaphragm swing roller 9 coats the negative electrode sheet.
  • the second cutting and clamping mechanism 6 cuts the positive electrode sheet and clamps and transports the cut electrode sheet to the negative electrode sheet on the stacking platform 4, and then the diaphragm swing roller 9 coats the negative electrode sheet;
  • the first cutting and clamping mechanism 2 and the second cutting and clamping mechanism 6 operate alternately to clamp and transport the cut electrode sheet to the stacking platform 4, and the diaphragm swing roller 9 performs a Z-shaped reciprocating motion with the operation of the first cutting and clamping mechanism 2 and the second cutting and clamping mechanism 6 until the number of stacked electrode sheets meets the requirements, and the central control system controls the stacking platform 4 to work alternately to transport the stacked battery electrodes;
  • the central control system is provided with a standard length Lz of electrode slices.
  • the first detection device 3 detects the length of the pole piece cut by the first cutting and clamping mechanism 2 in real time
  • the second detection device 5 detects the length of the pole piece cut by the second cutting and clamping mechanism 6 in real time, and transmits the detection result to the central control system;
  • the central control system is provided with a pole piece length deviation value Lp.
  • the pole piece length detected by the i-th detection device is L, i is one of 1 and 2.
  • the central control system compares the absolute value Lq of the difference with the pole piece length deviation value Lp.
  • the central control system determines that the length of the cut pole piece is within a reasonable range
  • the central control system determines that the length of the cut pole piece is not within a reasonable range, and the central control system adjusts the rotation speed of the i-th driving roller.
  • the present invention arranges two sets of mechanisms for left-right interleaved stacking.
  • pole pieces When placing pole pieces on one side, pole pieces are cut on the other side, eliminating the need for pole piece boxes in conventional products.
  • Battery pole pieces can be cut and stacked directly, reducing workstations and speeding up product production efficiency.
  • the initial running speed of the i-th driving roller is V.
  • the central control system determines that the length of the pole piece cut by the i-th cutting and clamping mechanism is shorter than the required length, and the central control system increases the rotation speed of the i-th driving roller.
  • the initial running speed of the i-th driving roller is V.
  • the central control system determines that the length of the pole piece cut by the i-th cutting and clamping mechanism is longer than the required length, and the central control system reduces the rotation speed of the i-th driving roller.
  • the driving roller speed is adjusted by detecting the slice length, without the need for manual control, thus shortening the early debugging time of the equipment and accelerating the equipment production efficiency.
  • adjusting the slicing length by adjusting the running speed of the driving roller is one way to adjust the slicing.
  • Those skilled in the art can also adjust the slicing length by adjusting the stroke of the i-th cutting and clamping mechanism and the cutting frequency.
  • a positioning camera is provided on one side of the driving roller, which can monitor the conveying length of the diaphragm to ensure that the cutting length of the electrode is within a reasonable range.
  • the first detection device 3 and the second detection device 5 detect the stacking state of the pole pieces on the stacking platform 4;
  • the lithium battery cutting and stacking device is capable of single-piece stacking and multi-piece stacking.
  • the first detection device 3 and the second detection device 5 detect the vertical overlap of the stacked battery pole pieces;
  • the first detection device 3 and the second detection device 5 first detect the horizontal spacing of the stacked battery pole pieces, and then detect the vertical overlap of the stacked battery pole pieces.
  • the stroke of the cutting and clamping mechanism is adjusted to improve the product qualification rate.
  • the first detection device 3 and the second detection device 5 detect the vertical overlap C of the stacked battery pole pieces, and transmit the detection results to the central control system, in which an overlap evaluation value Cz is set.
  • the central control system compares the overlap evaluation value Cz with the overlap C.
  • the central control system determines that the overlap of the battery electrodes meets the standard, and the central control system controls the lithium battery cutting and stacking device to perform continuous slicing and stacking production.
  • the central control system determines that the overlap of the battery pole pieces does not meet the standard, and the central control system controls the cutting and clamping mechanism to adjust the operating stroke to ensure the overlap of the battery pole pieces.
  • the central control system is provided with a standard distance Dz1 from the left edge of the negative pole piece to the left edge of the stacking platform, and a standard distance Dz2 from the left edge of the right pole piece to the right edge of the stacking platform;
  • the first detection device 3 detects the distance D1 from the left edge of the negative pole piece on the stacking platform 4 to the left edge of the stacking platform
  • the second detection device 5 detects the distance D2 from the right edge of the positive pole piece on the stacking platform 4 to the right edge of the stacking platform.
  • , P2
  • the central control system determines that the deviation position of the negative electrode sheet is greater than the deviation position of the positive electrode sheet, and the central control system adjusts the movement stroke of the first cutting and clamping mechanism 2 with the right edge position of the positive electrode sheet as the reference point;
  • the central control system determines that the deviation position of the negative electrode piece is smaller than the deviation position of the positive electrode piece. Position, the central control system takes the left edge position of the negative electrode sheet as a reference point to adjust the movement stroke of the second cutting and clamping mechanism 6.
  • the overlap of the battery sheets is 1.
  • the positions of the positive and negative electrode sheets are detected separately, and the standard position is re-determined based on the sheet on the side with the smaller deviation.
  • one side is used as the reference to adjust the other side. Only one side of the original is adjusted to increase the stability of the adjustment and prevent the probability of failure, thereby indirectly speeding up production efficiency.
  • the first detection device 3 detects the horizontal distance K1 between the negative electrode sheets
  • the second detection device 5 detects the horizontal distance K2 between the positive electrode sheets.
  • the central control system adjusts the first cutting and clamping mechanism 2 and the second cutting and clamping mechanism 6 according to the horizontal distance K1 and the horizontal distance K2 to ensure that the horizontal distance between the negative electrode sheets is the same as the horizontal distance between the positive electrode sheets.
  • the first detection device 3 and the second detection device 5 detect the vertical overlap of the stacked battery sheets, and the central control system determines the overlap.
  • the central control system determines that the overlap of the battery sheets does not meet the standard
  • the The first detection device 3 detects the distance value from the left edge of the leftmost negative electrode sheet on the stacking platform 4 to the left edge of the stacking platform
  • the second detection device 5 detects the distance value from the right edge of the rightmost positive electrode sheet on the stacking platform 4 to the right edge of the stacking platform, and adjusts the stroke of the first cutting and clamping mechanism 2 or the second cutting and clamping mechanism 6 according to each distance value so that the overlap degree of the battery electrodes meets the standard.
  • the cutting and clamping mechanism includes a cutting unit and a clamping unit, wherein the cutting unit is used to cut the battery pole piece, and the clamping unit is used to clamp the cut pole piece and convey it to the lamination table.
  • the lamination table is also provided with a pressing knife for auxiliary lamination.
  • the edge is a manifestation of this technology.
  • the center line is used to determine the processing reference, and the center line of the stacking table is used as the initial reference line.
  • the first detection device and the second detection device detect the vertical overlap C of the stacked battery pole pieces, and transmit the detection results to the central control system.
  • the central control system is provided with an overlap evaluation value Cz.
  • the central control system compares the overlap evaluation value Cz with the overlap C.
  • the central control system determines that the overlap of the battery pole pieces meets the standard, and the central control system controls the lithium battery cutting and stacking device to perform continuous slicing and stacking production.
  • C>Cz the central control system determines that the overlap of the battery pole pieces does not meet the standard, and the central control system controls the cutting and clamping mechanism to adjust the operating stroke to ensure the overlap of the battery pole pieces.
  • the first detection device detects the distance P1 from the center line of the negative electrode sheet to the reference line
  • the second detection device detects the distance P2 from the center line of the positive electrode sheet to the reference line.
  • the central control system compares P1 with P2.
  • the central control system selects the center line of the negative electrode sheet as the new reference and adjusts the stroke of the second cutting and clamping mechanism.
  • the original stroke distance of the second cutting and clamping mechanism is Q2
  • the adjusted stroke distance is Q2':
  • the central control system selects the center line of the positive electrode sheet as the new reference and adjusts the stroke of the first cutting and clamping mechanism; the original stroke distance of the first cutting and clamping mechanism is Q1, and the adjustment The final travel distance is Q1':
  • the cutting unit and the chasing clamping unit are fixedly arranged and work in coordination. After the cutting unit is finished, it runs together with the chasing clamping unit.
  • the drive 13 drives the cutting unit (lower knife 11/upper knife 12), the clamp (lower clamp 14/upper clamp 15), the cutter motor 16 and other structural parts to drive left and right in a straight line, and the function is to catch up with the moving pole piece (driven to feed by the driving roller), and at a constant speed, the upper cutter is driven by the cutter motor (through the eccentric wheel) to move downward to cut the pole piece (and drive the upper clamping jaw to clamp the pole piece at the same time).
  • the whole set of mechanisms is driven to feed the sheet to the stacking table quickly.
  • the pressing knife presses down to fix the pole piece, and then the cutter motor drives the upper cutter 11 and the upper clamping jaw 15 to open, and finally the linear drive 13 drives the whole set of mechanisms to return.
  • the same motor controls the cutting unit and the chasing clamping unit, which reduces the equipment process and increases the stability of the equipment operation.
  • the cutting unit and the chasing clamping unit are separately arranged, the cutting unit is fixed after cutting, and the chasing clamping unit clamps the cut pole piece and transports it to the lamination table; the first driving roller drives the pole piece to move forward, and the cutter motor 16 in the cutting unit drives the upper knife 12 to cut the pole piece; the clamp motor 15 drives the upper clamp 15 to move downward to clamp the pole piece, and then drives the lower clamp 14, the upper clamp 15, the clamp motor 25 and the pole piece to the lamination table through the drive 23.
  • the pressing knife presses down to fix the pole piece, and then the clamp motor drives the upper clamp 15 to open, and finally the linear drive 13 drives the entire clamp mechanism to return.
  • the cutting unit and the chasing clamping unit are separately arranged to reduce the volume of the equipment that drives the pole piece to operate, thereby reducing the channel volume required for the operation of the components and reducing the overall space occupied by the equipment.
  • form one the diaphragm swing roller 9 moves in a corresponding manner according to the distance and speed of the feeding film.
  • the diaphragm caching mechanism 101 performs diaphragm caching according to the speed, distance and tension;

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Abstract

本发明涉及一种锂电池切叠装置，包括叠片台（4）、第一驱动辊（1）、第二驱动辊（7）、第一切割夹取机构（2）、第二切割夹取机构（6）、隔膜摆动辊（9）、隔膜缓存辊机构（10）、第一检测装置（3）、第二检测装置（5）、中控系统。本发明通过设置两套机构左右对插式叠片，在一侧放极片时，另一侧进行极片的切割，省去了常规产品中极片中转的设置，在第一切割夹取机构（2）和第二切割夹取机构（6）的往复运行中，能够推动隔膜摆动辊（9）上的隔膜，在装置运行过程中，通过对切片长度的检测调节驱动辊运行速度，无需人工调控，缩短设备运行前期调试时间，加快设备生产效率；在设备运行时，自行根据极片堆叠情况，调节切割夹取机构运行的行程，提升产品的合格率。

Description

一种锂电池切叠装置
本申请要求于2022年11月28日申请的，申请号为2022114988073、名称为“一种锂电池切叠装置”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及电池加工技术领域，具体而言，涉及一种锂电池切叠装置。
背景技术
目前锂电池裸电芯成型工序切叠一体机均采用多个叠片工位设计(统称为：两切三叠或两切四叠)，造成设备占地空间大、制造成本高、结构复杂、稼动率低等缺点。另外：常规Z字型切叠一体机生产过程需要多段皮带对产品进行输送，由于皮带为长期循环利用，表面长时间产品接触，皮带易污染，难清洁，在产品输送过程中容易造成产品损伤和二次污染。
常规Z字型切叠一体机生产过程需要多组机械转运，并采用X，Y，θ平台对产品进行纠正定位，频繁转运对产品容易造成损伤和二次污染，而且多组机械手交替转运，机械结构之间存在累计误差，产品精度降低或不可控。
中国专利公开号，CN107768730A，公布了一种锂电池极片叠片设备，极片盒上设有多个等间距的片盒挡板，电池极片插在片盒挡板之间；极片抓取机械手与升降装置连接，升降装置与横向移动装置连接，横向移动装置安装在框架上；隔膜支架的两侧边设有支架槽；隔膜支杆设有多个，隔膜支杆的一端穿过支架槽与隔膜支杆定位装置连接，隔膜支杆定位装置与隔膜收紧装置活动连接；隔膜交错绷紧在隔膜支杆的另一端，成Z形，形成多个极片槽；电芯抓取机械手与关节机械臂连接；框架、隔膜收紧装置和关节机械臂均固定在底座上；极片盒活动安装在底座上。
常规Z字型切叠一体机由于受限于效率限制，需要采用多工位分段设计导 致设备尺寸增加，多工位叠加更容易造成设备故障率增加，同时会降低设备运行效率。
发明内容
根据本申请的各种实施例，提供一种锂电池切叠装置。
本发明提供一种锂电池切叠装置，包括，
叠片台，用于承装堆叠的电池极片，所述叠片台设置若干个，交替工作进行电池极片承载与输送；
驱动辊，用于输送电池极片，所述驱动辊分为第一驱动辊和第二驱动辊，分别设置在所述叠片台的左右两侧，其中，所述第一驱动辊位于所述叠片台左侧，用于输送负极极片，所述第二驱动辊位于所述叠片台右侧，用于输送正极极片；
切割夹取机构，用于对所述驱动辊输送的电池极片进行切割、夹取、输送，所述切割夹取机构分为第一切割夹取机构和第二切割夹取机构，所述第一切割夹取机构用于切割负极极片并对切割的极片进行夹取与输送，所述第二切割夹取机构用于切割正极极片并对切割的极片进行夹取与输送；所述切割夹取机构能够将切割的电池极片输送至所述叠片台；
隔膜摆动辊，其设置在所述叠片台的上方，用于对叠片台上的电池极片进行覆膜，隔膜摆动辊能够进行左右摆动；
隔膜缓存辊机构，用于对隔膜摆动辊上的覆膜进行缓存调节，增加隔膜摆动辊带动覆膜运动的缓冲效果；
检测装置，其设置在所述切割夹取机构上方，用于检测电池极片的切割情况与堆叠情况，所述检测装置分为第一检测装置和第二检测装置，所述第一检测装置用于检测负极极片切割情况，所述第二检测装置用于检测正极极片切割情况；
中控系统，其与所述驱动辊、各所述切割夹取机构、各所述隔膜摆动辊、各所述叠片台、各所述检测装置分别相连，并控制各部件运行；在锂电池切叠装置运行时，所述隔膜摆动辊在所述叠片台铺设一层底膜，所述第一切割夹取机构对负极极片进行切割并将切割的极片夹取与输送至叠片台上的底膜上，第一切割夹取机构回退，在第一切割夹取机构对负极极片进行输送的同时，隔膜摆动辊与 第一切割夹取机构进行同向运动，对负极极片进行覆膜；所述第一切割夹取机构回退的过程中，所述第二切割夹取机构对正极极片进行切割并将切割的极片夹取与输送至叠片台上的负极极片上的隔膜上，同时，所述隔膜摆动辊与第二切割夹取机构进行同向运动，对正极极片进行覆膜；所述第一切割夹取机构和所述第二切割夹取机构交替运行，将切割的极片夹取与输送至所述叠片台上，所述隔膜摆动辊随第一切割夹取机构和第二切割夹取机构的运行进行Z字型往复运动，直至堆叠的极片层数符合要求，所述中控系统控制叠片台交替工作，运输堆叠完成的电池极片；所述中控系统通过对所述第一检测装置和所述第二检测装置检测的电极切片长度进行判定，调节所述驱动辊运行速度，对第一检测装置和第二检测装置检测的切片堆叠情况调节切割夹取机构的运动行程，以保障电池切叠的加工速度。
附图说明
构成本申请的一部分的附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。
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实施例的附图。
图1为本发明实施例中锂电池切叠装置的结构示意图。
图2为本发明实施例中锂电池切叠装置局部放大图。
图3为本发明实施例中锂电池切叠装置的结构立体示意图。
图4为本发明实施例中切割单元示意图。
图5为本发明实施例中夹子示意图。
具体实施方式
为了使本发明的目的和优点更加清楚明白，下面结合实施例对本发明作进一步描述；应当理解，此处所描述的具体实施例仅仅用于解释本发明，并不用于 限定本发明。
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非在限制本发明的保护范围。
需要说明的是，在本发明的描述中，术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述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发明的限制。
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；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。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。
本发明提供一种锂电池切叠装置，包括：
叠片台，用于承装堆叠的电池极片，所述叠片台设置若干个，交替工作进行电池极片承载与输送；
驱动辊，用于输送电池极片，所述驱动辊分为第一驱动辊和第二驱动辊，分别设置在所述叠片台的左右两侧，其中，所述第一驱动辊位于所述叠片台左侧，用于输送负极极片，所述第二驱动辊位于所述叠片台右侧，用于输送正极极片；
切割夹取机构，用于对所述驱动辊输送的电池极片进行切割、夹取、输送，所述切割夹取机构分为第一切割夹取机构和第二切割夹取机构，所述第一切割夹取机构用于切割负极极片并对切割的极片进行夹取与输送，所述第二切割夹取机构用于切割正极极片并对切割的极片进行夹取与输送；所述切割夹取机构能够将切割的电池极片输送至所述叠片台；
隔膜摆动辊，其设置在所述叠片台的上方，用于对叠片台上的电池极片进行覆膜，隔膜摆动辊能够进行左右摆动；
隔膜缓存辊机构，用于对隔膜摆动辊上的覆膜进行缓存调节，增加隔膜摆动辊带动覆膜运动的缓冲效果；
检测装置，其设置在所述切割夹取机构上方，用于检测电池极片的切割情况与堆叠情况，所述检测装置分为第一检测装置和第二检测装置，所述第一检测装置用于检测负极极片切割情况，所述第二检测装置用于检测正极极片切割情况；
中控系统，其与所述驱动辊、各所述切割夹取机构、各所述隔膜摆动辊、各所述叠片台、各所述检测装置分别相连，并控制各部件运行；在锂电池切叠装置运行时，所述隔膜摆动辊在所述叠片台铺设一层底膜，所述第一切割夹取机构对负极极片进行切割并将切割的极片夹取与输送至叠片台上的底膜上，第一切割夹取机构回退，在第一切割夹取机构对负极极片进行输送的同时，隔膜摆动辊与第一切割夹取机构进行同向运动，对负极极片进行覆膜；所述第一切割夹取机构回退的过程中，所述第二切割夹取机构对正极极片进行切割并将切割的极片夹取与输送至叠片台上的负极极片上的隔膜上，同时，所述隔膜摆动辊与第二切割夹取机构进行同向运动，对正极极片进行覆膜；所述第一切割夹取机构和所述第二切割夹取机构交替运行，将切割的极片夹取与输送至所述叠片台上，所述隔膜摆动辊随第一切割夹取机构和第二切割夹取机构的运行进行Z字型往复运动，直至堆叠的极片层数符合要求，所述中控系统控制叠片台交替工作，运输堆叠完成的电池极片；所述中控系统通过对所述第一检测装置和所述第二检测装置检测的电极切片长度进行判定，调节所述驱动辊运行速度，对第一检测装置和第二检测装置检测的切片堆叠情况调节切割夹取机构的运动行程，以保障电池切叠的加工速度。
进一步地，所述中控系统内设置有电极切片标准长度Lz，在锂电池切叠装置运行时，所述第一检测装置实时检测所述第一切割夹取机构切取的极片长度，所述第二检测装置实时检测所述第二切割夹取机构切取的极片长度，并将检测的结果传递至中控系统；
所述中控系统内设置有极片长度偏差值Lp，所述第i检测装置检测切取的极片长度为L，i为一、二中的一项，中控系统计算切取的极片长度为L与电极切片标准长度Lz的差值的绝对值Lq，Lq＝∣Lz-L∣，中控系统将差值的绝对值Lq极片长度偏差值Lp进行对比，
当Lq≤Lp时，所述中控系统判定切割极片的长度在合理范围内；
当Lq＞Lp时，所述中控系统判定切割极片的长度不在合理范围内，中控系统对第i驱动辊的转速进行调节。
进一步地，所述第i驱动辊的初始运行速度为V，当Lq＞Lp，且Lz＞L时，所述中控系统判定第i切割夹取机构切取的极片长度短于需求长度，中控系统加大第i驱动辊的转速，调节后的转速为V’，V’＝V+Lq×a1，其中，a1为差值的绝对值对驱动辊的加速调节参数。
进一步地，所述第i驱动辊的初始运行速度为V，当Lq＞Lp，且Lz＜L时，所述中控系统判定第i切割夹取机构切取的极片长度长于需求长度，中控系统减小第i驱动辊的转速，调节后的转速为V’，V’＝V-Lq×a2，其中，a2为差值的绝对值对驱动辊的减速调节参数。
所述第i检测装置继续检测切取的极片长度为L’，并计算极片长度为L’与电极切片标准长度Lz的差值的绝对值Lq’，当满足Lq’≤Lp，中控系统控制叠片台进行交替并对不合格长度的极片进行剔除。
进一步地，当所述第一切割夹取机构切取的极片长度和所述第二切割夹取机构切取的极片长度均在合理范围时，所述第一检测装置和所述第二检测装置检测极片在所述叠片台上的堆叠状态；
所述锂电池切叠装置能够进行单片堆叠与多片堆叠，当进行单片堆叠时，所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度；当进行多片堆叠时，所述第一检测装置和所述第二检测装置先检测进行堆叠电池极片的水平间距，之后检测堆叠的电池极片的竖直方向重合度。
进一步地，当所述锂电池切叠装置进行单片堆叠时，所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度C，并将检测结果传递至所述中控系统，所述中控系统内设置有重合度评价值Cz，中控系统将重合度评价值Cz与重合度C进行对比，
当C≤Cz时，所述中控系统判定电池极片重合度达标，中控系统控制锂电池切叠装置进行连续切片堆叠生产。
当C＞Cz时，所述中控系统判定电池极片重合度不达标，中控系统控制切割夹取机构调节运行行程，以保证电池极片重合度。
进一步地，所述中控系统内设置有负极极片的左边缘到堆叠台左侧边缘的标准距离Dz1，右极极片的左边缘到堆叠台右侧边缘的标准距离Dz2；
当所述中控系统判定电池极片重合度不达标时，所述第一检测装置检测所述叠片台上负极极片的左边缘到堆叠台左侧边缘的距离D1，所述第二检测装置检测所述叠片台上正极极片的右边缘到堆叠台右侧边缘的距离D2，中控系统分别计算负极极片位置偏移值P1和正极极片位置偏移值P2，P1＝∣D1-Dz1∣，P2＝∣D2-Dz2∣，中控系统将负极极片位置偏移值P1和正极极片位置偏移值P2进行对比，
当P1＞P2时，所述中控系统判定负极极片的偏差位置大于正极极片的偏差位置，中控系统以正极极片的右边缘位置为基准点，调节所述第一切割夹取机构的运动行程；
当P1＜P2时，所述中控系统判定负极极片的偏差位置小于正极极片的偏差位置，中控系统以负极极片的左边缘位置为基准点，调节所述第二切割夹取机构的运动行程。
进一步地，当所述锂电池切叠装置进行多片堆叠时，所述第一检测装置检测负极极片间的水平距离K1，所述第二检测装置检测正极极片间的水平距离K2，所述中控系统根据水平距离K1与水平距离K2对所述第一切割夹取机构和第二切割夹取机构进行调节，保证负极极片间的水平距离与正极极片间的水平距离相同。
进一步地，当负极极片间的水平距离与正极极片间的水平距离相同时，所述所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度，所述中控系统对重合度进行判定，当中控系统判定电池极片重合度不达标时，所述第一检测装置检测所述叠片台上最左侧负极极片的左边缘到堆叠台左侧边缘距离值，所述第二检测装置检测所述叠片台上最右侧正极极片的右边缘到堆叠台右侧边缘距离值，并根据各距离值，对第一切割夹取机构或第二切割夹取机构的行程进行调节，使得电池极片重合度达标。
进一步地，所述切割夹取机构包括切割单元和追夹单元，所述切割单元用于对电池极片进行切割，所述追夹单元用于将切割的极片夹取并输送至叠片台。
参考图1、图2和图3，本发明公布一种锂电池切叠装置，包括，
叠片台4，用于承装堆叠的电池极片，所述叠片台4设置若干个，交替工作进行电池极片承载与输送；
驱动辊，用于输送电池极片，所述驱动辊分为第一驱动辊1和第二驱动辊7，分别设置在所述叠片台4的左右两侧，其中，所述第一驱动辊1位于所述叠片台4左侧，用于输送负极极片，所述第二驱动辊7位于所述叠片台4右侧，用于输送正极极片；
切割夹取机构，用于对所述驱动辊输送的电池极片进行切割、夹取、输送，所述切割夹取机构分为第一切割夹取机构2和第二切割夹取机构6，所述第一切割夹取机构2用于切割负极极片并对切割的极片进行夹取与输送，所述第二切割夹取机构6用于切割正极极片并对切割的极片进行夹取与输送；所述切割夹取机构能够将切割的电池极片输送至所述叠片台4；
隔膜摆动辊9，其设置在所述叠片台4上方，用于对叠片台4上的电池极片进行覆膜，隔膜摆动辊9能够进行左右摆动；
隔膜缓存辊机构10，用于对隔膜摆动辊9上的覆膜进行缓存调节，增加隔膜摆动辊带动覆膜运动的缓冲效果，隔膜缓存辊机构10上存有浮动辊101和隔膜直线缓存102，当隔膜摆动辊9左右移动时，浮动辊101的位置发生改变，配合隔膜直线缓存102，以使得隔膜摆动辊9上薄膜的张力稳定；
检测装置，其设置在所述切割夹取机构上方，用于检测电池极片的切割情况与堆叠情况，所述检测装置分为第一检测装置3和第二检测装置5，第一检测装置3用于检测负极极片切割情况，第二检测装置5用于检测正极极片切割情况；
中控系统，其与所述驱动辊、各所述切割夹取机构、各所述隔膜摆动辊、各所述叠片台、各所述检测装置分别相连，并控制各部件运行；在锂电池切叠装置运行时，所述隔膜摆动辊在所述叠片台铺设一层底膜，所述第一切割夹取机构对负极极片进行切割并将切割的极片夹取与输送至叠片台上的底膜上，第一切割夹取机构回退，在第一切割夹取机构对负极极片进行输送的同时，隔膜摆动辊与第一切割夹取机构进行同向运动，对负极极片进行覆膜；所述第一切割夹取机构回退的过程中，所述第二切割夹取机构对正极极片进行切割并将切割的极片夹 取与输送至叠片台上的负极极片上方的薄膜上，同时，所述隔膜摆动辊与第二切割夹取机构进行同向运动，对正极极片进行覆膜；所述第一切割夹取机构和所述第二切割夹取机构交替运行，将切割的极片夹取与输送至所述叠片台上，所述隔膜摆动辊随第一切割夹取机构和第二切割夹取机构的运行进行Z字型往复运动，直至堆叠的极片层数符合要求，所述中控系统控制叠片台交替工作，运输堆叠完成的电池极片；所述中控系统通过对所述第一检测装置和所述第二检测装置检测的电极切片长度进行判定，调节所述驱动辊运行速度，对第一检测装置和第二检测装置检测的切片堆叠情况调节切割夹取机构的运动行程，以保障电池切叠的加工速度。
本实施例中，叠片台设置两台，并每台配有一套隔膜摆动辊，在叠片台交替时，无需进行等待。
本发明通过设置两套机构左右对插式叠片，节省了设备的占用空间，同时，在第一切割夹取机构和第二切割夹取机构的往复运行中，能够推动隔膜摆动辊上的隔膜，无需隔膜拉动装置，节省了工作单元，在装置运行过程中，通过对切片长度的检测调节驱动辊运行速度，无需人工调控，缩短设备运行前期调试时间，加快设备生产效率；在设备运行时，能够自行根据极片堆叠情况，调节切割夹取机构运行的行程，提升产品的合格率。
参考图1至图3，在锂电池切叠装置运行时，所述隔膜摆动辊9在所述叠片台4铺设一层底膜，所述第一切割夹取机构2对负极极片进行切割并将切割的极片夹取与输送至叠片台4上的底膜上，第一切割夹取机构2回退，隔膜摆动辊9对负极极片进行覆膜，同时，所述第二切割夹取机构6对正极极片进行切割并将切割的极片夹取与输送至叠片台4上的负极极片上，之后隔膜摆动辊9对负极极片进行覆膜；所述第一切割夹取机构2和所述第二切割夹取机构6交替运行，将切割的极片夹取与输送至所述叠片台4上，所述隔膜摆动辊9随第一切割夹取机构2和第二切割夹取机构6的运行进行Z字型往复运动，直至堆叠的极片层数符合要求，所述中控系统控制叠片台4交替工作，运输堆叠完成的电池极片；
所述中控系统内设置有电极切片标准长度Lz，在锂电池切叠装置运行时， 所述第一检测装置3实时检测所述第一切割夹取机构2切取的极片长度，所述第二检测装置5实时检测所述第二切割夹取机构6切取的极片长度，并将检测的结果传递至中控系统；
所述中控系统内设置有极片长度偏差值Lp，所述第i检测装置检测切取的极片长度为L，i为一、二中的一项，中控系统计算切取的极片长度为L与电极切片标准长度Lz的差值的绝对值Lq，Lq＝∣Lz-L∣，中控系统将差值的绝对值Lq极片长度偏差值Lp进行对比，
当Lq≤Lp时，所述中控系统判定切割极片的长度在合理范围内；
当Lq＞Lp时，所述中控系统判定切割极片的长度不在合理范围内，中控系统对第i驱动辊的转速进行调节。
本发明通过设置两套机构左右对插式叠片，在一侧放极片时，另一侧进行极片的切割，省去了常规产品中极片盒的设置，能够直接对电池极片进行切割叠放，减少工位，加快了产品生产的效率。
所述第i驱动辊的初始运行速度为V，当Lq＞Lp，且Lz＞L时，所述中控系统判定第i切割夹取机构切取的极片长度短于需求长度，中控系统加大第i驱动辊的转速，调节后的转速为V’，V’＝V+Lq×a1，其中，a1为差值的绝对值对驱动辊的加速调节参数。
所述第i驱动辊的初始运行速度为V，当Lq＞Lp，且Lz＜L时，所述中控系统判定第i切割夹取机构切取的极片长度长于需求长度，中控系统减小第i驱动辊的转速，调节后的转速为V’，V’＝V-Lq×a2，其中，a2为差值的绝对值对驱动辊的减速调节参数。
在装置运行过程中，通过对切片长度的检测调节驱动辊运行速度，无需人工调控，缩短设备运行前期调试时间，加快设备生产效率。
对于本领域技术人员，应该可知，采用调节驱动辊运行速度调节切片长度是对切片调节的一种方式，本领域技术人员还能通过对第i切割夹取机构的行程和切割的频率对切片长度进行调节，在所述驱动辊的一侧设置有定位相机，能过监测隔膜的输送长度，保障极片的切割长度在合理范围内。
当所述第一切割夹取机构2切取的极片长度和所述第二切割夹取机构6切 取的极片长度均在合理范围时，所述第一检测装置3和所述第二检测装置5检测极片在所述叠片台4上的堆叠状态；
所述锂电池切叠装置能够进行单片堆叠与多片堆叠，当进行单片堆叠时，所述第一检测装置3和所述第二检测装置5检测堆叠的电池极片的竖直方向重合度；当进行多片堆叠时，所述第一检测装置3和所述第二检测装置5先检测进行堆叠电池极片的水平间距，之后检测堆叠的电池极片的竖直方向重合度。
通过检测堆叠的电池极片的竖直方向重合度，调节切割夹取机构运行的行程，提升产品的合格率。
当所述锂电池切叠装置进行单片堆叠时，所述第一检测装置3和所述第二检测装置5检测堆叠的电池极片的竖直方向重合度C，并将检测结果传递至所述中控系统，所述中控系统内设置有重合度评价值Cz，中控系统将重合度评价值Cz与重合度C进行对比，
当C≤Cz时，所述中控系统判定电池极片重合度达标，中控系统控制锂电池切叠装置进行连续切片堆叠生产。
当C＞Cz时，所述中控系统判定电池极片重合度不达标，中控系统控制切割夹取机构调节运行行程，以保证电池极片重合度。
所述中控系统内设置有负极极片的左边缘到堆叠台左侧边缘的标准距离Dz1，右极极片的左边缘到堆叠台右侧边缘的标准距离Dz2；
参考图1和图2，当所述中控系统判定电池极片重合度不达标时，所述第一检测装置3检测所述叠片台4上负极极片的左边缘到堆叠台左侧边缘的距离D1，所述第二检测装置5检测所述叠片台4上正极极片的右边缘到堆叠台右侧边缘的距离D2，中控系统分别计算负极极片位置偏移值P1和正极极片位置偏移值P2，P1＝∣D1-Dz1∣，P2＝∣D2-Dz2∣，中控系统将负极极片位置偏移值P1和正极极片位置偏移值P2进行对比，
当P1＞P2时，所述中控系统判定负极极片的偏差位置大于正极极片的偏差位置，中控系统以正极极片的右边缘位置为基准点，调节所述第一切割夹取机构2的运动行程；
当P1＜P2时，所述中控系统判定负极极片的偏差位置小于正极极片的偏差 位置，中控系统以负极极片的左边缘位置为基准点，调节所述第二切割夹取机构6的运动行程。
当正负电极片均在理想位置时，电池极片重合度为1，当电池极片重合度不达标时，对正负电极片的位置进行分别检测，并以偏差位置较小的一侧极片为基准重新确定标准位置，调节切割夹取机构行程时，以一侧为基准，调节另一侧，只对单侧原件进行调节，增加调节的稳定性，防止故障发生的概率，从而侧面加快生产效率。
在本实施例中重合度评价值Cz＝0.98。
当P1＞P2时，所述第一切割夹取机构2的原行程距离为Q1，调节后的行程距离为Q1’。
当D1＜Dz1且D2＞Dz2时，Q1’＝Q1+P1-P2；
当D1＜Dz1且D2＜Dz2时，Q1’＝Q1+P1+P2；
当D1＞Dz1且D2＞Dz2时，Q1’＝Q1-P1-P2；
当D1＞Dz1且D2＜Dz2时，Q1’＝Q1-P1+P2。
当P1＜P2时，所述第二切割夹取机构6的原行程距离为Q2，调节后的行程距离为Q2’。
当D1＜Dz1且D2＞Dz2时，Q2’＝Q2+P1-P2；
当D1＜Dz1且D2＜Dz2时，Q2’＝Q2+P1+P2；
当D1＞Dz1且D2＞Dz2时，Q2’＝Q2-P1-P2；
当D1＞Dz1且D2＜Dz2时，Q1’＝Q2-P1+P2。
当所述锂电池切叠装置进行多片堆叠时，所述第一检测装置3检测负极极片间的水平距离K1，所述第二检测装置5检测正极极片间的水平距离K2，所述中控系统根据水平距离K1与水平距离K2对所述第一切割夹取机构2和第二切割夹取机构6进行调节，保证负极极片间的水平距离与正极极片间的水平距离相同。
当负极极片间的水平距离与正极极片间的水平距离相同时，所述所述第一检测装置3和所述第二检测装置5检测堆叠的电池极片的竖直方向重合度，所述中控系统对重合度进行判定，当中控系统判定电池极片重合度不达标时，所述 第一检测装置3检测所述叠片台4上最左侧负极极片的左边缘到堆叠台左侧边缘距离值，所述第二检测装置5检测所述叠片台4上最右侧正极极片的右边缘到堆叠台右侧边缘距离值，并根据各距离值，对第一切割夹取机构2或第二切割夹取机构6的行程进行调节，使得电池极片重合度达标。
所述切割夹取机构包括切割单元和追夹单元，所述切割单元用于对电池极片进行切割，所述追夹单元用于将切割的极片夹取并输送至叠片台。所述叠片台上还设置有压刀，用以进行辅助压片。
对于本领域技术人员，应该可知，采用边缘作为基准点是本技术的一种表现形式，本领域人员能够根据实际需求，确定对齐基准的位置，例如，采用中心线确定加工基准，以叠片台中心线作为初始基准线，当采取中心线为加工基准时，所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度C，并将检测结果传递至所述中控系统，所述中控系统内设置有重合度评价值Cz，中控系统将重合度评价值Cz与重合度C进行对比，当C≤Cz时，所述中控系统判定电池极片重合度达标，中控系统控制锂电池切叠装置进行连续切片堆叠生产。当C＞Cz时，所述中控系统判定电池极片重合度不达标，中控系统控制切割夹取机构调节运行行程，以保证电池极片重合度。
所述第一检测装置检测负极极片的中心线到基准线的距离P1，所述第二检测装置检测正极极片的中心线到基准线的距离P2，中控系统将P1与P2进行对比，
当P1＜P2时，中控系统选取负极极片的中心线作为新的基准，并对第二切割夹取机构的行程进行调节，所述第二切割夹取机构的原行程距离为Q2，调节后的行程距离为Q2’：
当负极极片位于原基准线左侧时，若正极极片位于原基准线左侧则，Q2’＝Q2-P2+P1；若正极极片位于原基准线右侧则，Q2’＝Q2+P2+P1；
当负极极片位于原基准线右侧时，若正极极片位于原基准线左侧则，Q2’＝Q2-P2-P1；若正极极片位于原基准线右侧则，Q2’＝Q2+P2-P1；
当P1＞P2时，中控系统选取正极极片的中心线作为新的基准，并对第一切割夹取机构的行程进行调节；所述第一切割夹取机构的原行程距离为Q1，调节 后的行程距离为Q1’：
当正极极片位于原基准线左侧时，若负极极片位于原基准线左侧则，Q1’＝Q1-P2+P1；若负极极片位于原基准线右侧则，Q1’＝Q1-P2-P1；
当正极极片位于原基准线右侧时，若负极极片位于原基准线左侧则，Q1’＝Q1+P2+P1；若负极极片位于原基准线右侧则，Q1’＝Q1+P2-P1。
参考图1、图4和图5，作为本发明一种实施例，所述切割单元和追夹单元固定设置，协同运作，切割单元切割完成后同追夹单元一同运行；驱动13带动切割单元(下刀11/上刀12)、夹子(下夹子14/上夹子15)、切刀电机16和其它结构件做直线左右驱动，作用在于追上运动中的极片(通过驱动辊驱动送料)，在等速的时候通过切刀电机驱动(通过偏心轮)上切刀往下运动裁切极片(同时驱动上夹爪夹住极片)，裁断后整套机构快速向叠片台驱动送片，到达预定位置后，压刀下压固定极片，然后切刀电机驱动上切刀11和上夹爪15打开，最后直线驱动13驱动整套机构退回。通过同一电机控制切割单元和追夹单元，减少设备工序，增加设备运行的稳定性。在此过程中存在两种工作形式，其中，形式一：隔膜摆动辊9根据送片的距离和速度情况以相对应的速度进行相对应的左右摆动，同时隔膜缓存机构101根据速度、距离和张力情况进行隔膜缓存；形式二：隔膜摆动辊9左右摆动部分距离m1，叠片台4摆动部分距离n1，m1+n2＝形式一中摆动距离，通过摆动辊9，叠片台4，追切驱动23的三个运动机构运动距离的缩小来提高设备的效率。
参考图1、图4和图5，作为本发明一种实施例，所述切割单元和追夹单元分隔设置，切割单元切割完成后固定不动，追夹单元夹取切割的极片运输至叠片台；第一驱动辊驱动极片向前运动，切割单元中的切刀电机16驱动上刀12裁切极片；夹子电机15驱动上夹子15往下运动夹住极片，然后通过驱动23带动下夹子14、上夹子15夹子电机25和极片往叠片台送片，到达预定位置后，压刀下压固定极片，然后夹子电机驱动上夹子15打开，最后直线驱动13驱动整套夹子机构退回。切割单元和追夹单元分隔设置，减少带动极片运作的设备体积，进而减小部件运作所需通道体积，缩小设备的整体占用空间。在此过程中存在两种工作形式，其中，形式一：隔膜摆动辊9根据送片的距离和速度情况以相对应 的速度进行相对应的左右摆动，同时隔膜缓存机构101根据速度、距离和张力情况进行隔膜缓存；形式二：隔膜摆动辊9左右摆动部分距离m1，叠片台4摆动部分距离n1，m1+n2＝形式一中摆动距离，通过摆动辊9，叠片台4，送片驱动23的三个运动机构运动距离的缩小来提高设备的效率。
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式(如：原理相同或类似的情况下，多套机构的组合、其中某个机构数量的变化、又或者一次叠若干片)。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征做出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。

Claims (15)

  1. 一种锂电池切叠装置，其特征在于，包括，
    叠片台，用于承装堆叠的电池极片，所述叠片台设置若干个，交替工作进行电池极片承载与输送；
    驱动辊，用于输送电池极片，所述驱动辊包括第一驱动辊和第二驱动辊，所述第一驱动辊和所述第二驱动辊分别设置在所述叠片台的左右两侧，其中，所述第一驱动辊位于所述叠片台左侧，用于输送负极极片，所述第二驱动辊位于所述叠片台右侧，用于输送正极极片；
    切割夹取机构，包括第一切割夹取机构和第二切割夹取机构，所述第一切割夹取机构用于切割负极极片并对切割的极片进行夹取与输送，所述第二切割夹取机构用于切割正极极片并对切割的极片进行夹取与输送；所述切割夹取机构能够将切割的电池极片输送至所述叠片台；
    隔膜摆动辊，设置在所述叠片台上方，用于对所述叠片台上的电池极片进行覆膜，所述隔膜摆动辊能够进行左右摆动；
    检测装置，设置在所述切割夹取机构上方，用于检测电池极片的切割情况与堆叠情况，所述检测装置包括第一检测装置和第二检测装置，所述第一检测装置用于检测负极极片切割情况，所述第二检测装置用于检测正极极片切割情况；
    中控系统，与所述驱动辊、各所述切割夹取机构、各所述隔膜摆动辊、各所述叠片台、各所述检测装置分别相连，并控制各部件运行；在所述锂电池切叠装置运行时，所述隔膜摆动辊在所述叠片台铺设一层底膜，所述第一切割夹取机构对负极极片进行切割并将切割的极片夹取与输送至所述叠片台上的底膜上，所述第一切割夹取机构回退，在所述第一切割夹取机构对负极极片进行输送的同时，所述隔膜摆动辊与所述第一切割夹取机构进行同向运动，对负极极片进行覆膜；所述第一切割夹取机构回退的过程中，所述第二切割夹取机构对正极极片进行切割并将切割的极片夹取与输送至所述叠片台上的负极极片上的隔膜上，同时，所述隔膜摆动辊与所述第二切割夹取机构进行同向运动，对正极极片进行覆膜；所述第一切割夹取机构和所述第二切割夹取机构交替运行，将切割的极片夹取与输送至所述叠片台上，所述隔膜摆动辊随所述第一切割夹取机构和所述第 二切割夹取机构的运行进行Z字型往复运动，直至堆叠的极片层数符合要求，所述中控系统控制所述叠片台交替工作，运输堆叠完成的电池极片；所述中控系统通过对所述第一检测装置和所述第二检测装置检测的电极切片长度进行判定，调节所述驱动辊运行速度，对所述第一检测装置和所述第二检测装置检测的切片堆叠情况调节所述切割夹取机构的运动行程。
  2. 根据权利要求1所述的锂电池切叠装置，其特征在于，所述中控系统内设置有电极切片标准长度Lz，在锂电池切叠装置运行时，所述第一检测装置实时检测所述第一切割夹取机构切取的极片长度，所述第二检测装置实时检测所述第二切割夹取机构切取的极片长度，并将检测的结果传递至所述中控系统；
    所述中控系统内设置有极片长度偏差值Lp，所述第i检测装置检测切取的极片长度为L，i为一、二中的一项，所述中控系统计算切取的极片长度为L与电极切片标准长度Lz的差值的绝对值Lq，Lq＝∣Lz-L∣，所述中控系统将差值的绝对值Lq极片长度偏差值Lp进行对比，
    当Lq≤Lp时，所述中控系统判定切割极片的长度在合理范围内；
    当Lq＞Lp时，所述中控系统判定切割极片的长度不在合理范围内，中控系统对第i驱动辊的转速进行调节。
  3. 根据权利要求2所述的锂电池切叠装置，其特征在于，所述第i驱动辊的初始运行速度为V，当Lq＞Lp，且Lz＞L时，所述中控系统判定所述第i切割夹取机构切取的极片长度短于需求长度，所述中控系统加大所述第i驱动辊的转速，调节后的转速为V’，V’＝V+Lq×a1，其中，a1为差值的绝对值对驱动辊的加速调节参数。
  4. 根据权利要求2所述的锂电池切叠装置，其特征在于，所述第i驱动辊的初始运行速度为V，当Lq＞Lp，且Lz＜L时，所述中控系统判定所述第i切割夹取机构切取的极片长度长于需求长度，所述中控系统减小所述第i驱动辊的转速，调节后的转速为V’，V’＝V-Lq×a2，其中，a2为差值的绝对值对驱动辊的减速调节参数。
  5. 根据权利要求2所述的锂电池切叠装置，其特征在于，当所述第一切割夹取机构切取的极片长度和所述第二切割夹取机构切取的极片长度均在合理范 围时，所述第一检测装置和所述第二检测装置检测极片在所述叠片台上的堆叠状态；
    所述锂电池切叠装置能够进行单片堆叠，当进行单片堆叠时，所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度。
  6. 根据权利要求5所述的锂电池切叠装置，其特征在于，当所述锂电池切叠装置进行单片堆叠时，所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度C，并将检测结果传递至所述中控系统，所述中控系统内设置有重合度评价值Cz，所述中控系统将重合度评价值Cz与重合度C进行对比，
    当C≤Cz时，所述中控系统判定电池极片重合度达标，所述中控系统控制锂电池切叠装置进行连续切片堆叠生产；
    当C＞Cz时，所述中控系统判定电池极片重合度不达标，所述中控系统控制切割夹取机构调节运行行程，以保证电池极片重合度，同时进行闭环纠偏控制提高精度。
  7. 根据权利要求5所述的锂电池切叠装置，其特征在于，所述锂电池切叠装置还能够进行多片堆叠，当进行多片堆叠时，所述第一检测装置和所述第二检测装置先检测进行堆叠电池极片的水平间距，之后检测堆叠的电池极片的竖直方向重合度。
  8. 根据权利要求6所述的锂电池切叠装置，其特征在于，所述中控系统内设置有负极极片的左边缘到所述堆叠台左侧边缘的标准距离Dz1，右极极片的左边缘到所述堆叠台右侧边缘的标准距离Dz2；
    当所述中控系统判定电池极片重合度不达标时，所述第一检测装置检测所述叠片台上负极极片的左边缘到所述堆叠台左侧边缘的距离D1，所述第二检测装置检测所述叠片台上正极极片的右边缘到所述堆叠台右侧边缘的距离D2，所述中控系统分别计算负极极片位置偏移值P1和正极极片位置偏移值P2，P1＝∣D1-Dz1∣，P2＝∣D2-Dz2∣，所述中控系统将负极极片位置偏移值P1和正极极片位置偏移值P2进行对比，
    当P1＞P2时，所述中控系统判定负极极片的偏差位置大于正极极片的偏差 位置，所述中控系统以正极极片的右边缘位置为基准点，调节所述第一切割夹取机构的运动行程；
    当P1＜P2时，所述中控系统判定负极极片的偏差位置小于正极极片的偏差位置，所述中控系统以负极极片的左边缘位置为基准点，调节所述第二切割夹取机构的运动行程。
  9. 根据权利要求8所述的锂电池切叠装置，其特征在于，当所述锂电池切叠装置进行多片堆叠时，所述第一检测装置检测负极极片间的水平距离K1，所述第二检测装置检测正极极片间的水平距离K2，所述中控系统根据水平距离K1与水平距离K2对所述第一切割夹取机构和所述第二切割夹取机构进行调节。
  10. 根据权利要求9所述的锂电池切叠装置，其特征在于，当负极极片间的水平距离与正极极片间的水平距离相同时，所述第一检测装置和所述第二检测装置检测堆叠的电池极片的竖直方向重合度，所述中控系统对重合度进行判定，当所述中控系统判定电池极片重合度不达标时，所述第一检测装置检测所述叠片台上最左侧负极极片的左边缘到所述堆叠台左侧边缘距离值，所述第二检测装置检测所述叠片台上最右侧正极极片的右边缘到所述堆叠台右侧边缘距离值，并根据各距离值，对所述第一切割夹取机构或所述第二切割夹取机构的行程进行调节，使得电池极片重合度达标。
  11. 根据权利要求10所述的锂电池切叠装置，其特征在于，所述切割夹取机构包括切割单元和追夹单元，所述切割单元用于对电池极片进行切割，所述追夹单元用于将切割的极片夹取并输送至所述叠片台。
  12. 根据权利要求11所述的锂电池切叠装置，其特征在于，所述切割单元和所述追夹单元固定设置，所述切割单元在切割完成后随所述追夹单元一同运动。
  13. 根据权利要求11所述的锂电池切叠装置，其特征在于，所述切割单元和所述追夹单元分隔设置，所述切割单元在切割完成后固定不动。
  14. 根据权利要求11所述的锂电池切叠装置，其特征在于，所述叠片台上还设置有压刀，所述压刀用于辅助压片。
  15. 根据权利要求1所述的锂电池切叠装置，其特征在于，所述锂电池切叠 装置还包括隔膜缓存辊机构，所述隔膜缓存辊机构上存有浮动辊和隔膜直线缓存，当所述隔膜摆动辊左右移动时，所述浮动辊的位置发生改变，配合所述隔膜直线缓存，以使得所述隔膜摆动辊上薄膜的张力稳定。
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CN115799654A (zh) 2023-03-14

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