CN114054975A - Cutting device and cutting method for multilayer isolating film of lithium battery - Google Patents

Cutting device and cutting method for multilayer isolating film of lithium battery Download PDF

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Publication number
CN114054975A
CN114054975A CN202111288101.XA CN202111288101A CN114054975A CN 114054975 A CN114054975 A CN 114054975A CN 202111288101 A CN202111288101 A CN 202111288101A CN 114054975 A CN114054975 A CN 114054975A
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CN
China
Prior art keywords
electric core
plate
screw rod
cell
rod type
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Pending
Application number
CN202111288101.XA
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Chinese (zh)
Inventor
汤继磊
姜昆
丁帅铭
吴良骥
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Jiewei Power Industry Jiaxing Co ltd
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Jiewei Power Industry Jiaxing Co ltd
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Priority to CN202111288101.XA priority Critical patent/CN114054975A/en
Publication of CN114054975A publication Critical patent/CN114054975A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36Removing material
    • B23K26/38Removing material by boring or cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/08Devices involving relative movement between laser beam and workpiece
    • B23K26/0869Devices involving movement of the laser head in at least one axial direction
    • B23K26/0876Devices involving movement of the laser head in at least one axial direction in at least two axial directions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/40Separators; Membranes; Diaphragms; Spacing elements inside cells
    • H01M50/403Manufacturing processes of separators, membranes or diaphragms
    • H01M50/406Moulding; Embossing; Cutting
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Laser Beam Processing (AREA)

Abstract

The invention discloses a cutting device and a cutting method for a multilayer isolating film of a lithium battery. The cutting device comprises a fixing plate, a support, a laser head module, a screw rod type electric cylinder, an electric core upper pressing plate, an electric core supporting frame, an electric core supporting plate, a sliding rail and a plurality of electric cores which are connected through isolating films; the bracket is fixedly arranged on the fixed plate; the slide rail is fixedly arranged on the fixed plate; the screw rod type electric cylinder is fixedly arranged on the bracket, and the laser head module is locked and fixed on a sliding table of the screw rod type electric cylinder so as to enable the screw rod type electric cylinder to drive the laser module to move; the electric core upper press plate is arranged on the electric core, the electric core support frame is arranged on the electric core support frame, the electric core support frame is fixedly arranged on the electric core support plate, and the electric core support plate is connected with the slide rail in a sliding mode, so that the electric core of the plurality moves along with the sliding of the electric core support plate.

Description

Cutting device and cutting method for multilayer isolating film of lithium battery
Technical Field
The invention relates to the technical field of lithium battery cutting and stacking integrated machines, in particular to a cutting device and a cutting method for a multilayer isolating film of a lithium battery.
Background
The lithium battery is a battery which uses metal lithium or lithium alloy as a negative electrode material and uses organic solution as electrolyte, compared with the traditional aqueous solution battery, the lithium battery has the advantages of higher specific energy, long cycle life, environmental friendliness and the like, and is a battery system with great development potential.
The mode that cuts the diaphragm that has now is hot cut and cold cut, though the operation is decided to the barrier film all can be accomplished to hot cut and cold cut mode, nevertheless owing to both adopt the contact to decide, therefore the barrier film can appear the top layer pottery and drop, cut surface wire drawing deckle edge etc. and too much pottery is piled up into granule increase electricity core (little) short circuit risk, finally may lead to the incident to take place.
Aiming at the technical problem, the invention provides a cutting device and a cutting method for a multilayer isolating film of a lithium battery.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a cutting device and a cutting method for a multilayer isolating film of a lithium battery.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cutting device for multilayer isolating membranes of lithium batteries comprises a fixing plate, a support, a laser head module, a screw rod type electric cylinder, an electric core upper pressing plate, an electric core supporting frame, an electric core supporting plate, a sliding rail and a plurality of electric cores connected through isolating membranes;
the bracket is fixedly arranged on the fixed plate; the slide rail is fixedly arranged on the fixed plate; the screw rod type electric cylinder is fixedly arranged on the bracket, and the laser head module is locked and fixed on a sliding table of the screw rod type electric cylinder so as to enable the screw rod type electric cylinder to drive the laser module to move; the electric core upper press plate is arranged on the electric core, the electric core support frame is arranged on the electric core support frame, the electric core support frame is fixedly arranged on the electric core support plate, and the electric core support plate is connected with the slide rail in a sliding mode, so that the electric core of the plurality moves along with the sliding of the electric core support plate.
Further, the laser head module comprises a transmission assembly, a servo motor and a nozzle, the nozzle is arranged below the transmission assembly, and the servo motor is arranged on one side of the transmission assembly so that the servo motor controls the transmission assembly and then drives the nozzle to move.
Furthermore, the support comprises a cross beam and vertical supports arranged at two ends of the cross beam; the vertical support is fixedly arranged on the fixing plate, and the screw rod type electric cylinder is fixedly arranged on the cross beam.
Further, the electric core support frame comprises an electric core lower pressing plate, an electric core lower pressing plate support, the electric core lower pressing plate and the electric core lower pressing plate support are fixedly connected, a plurality of electric cores are arranged on the electric core lower pressing plate, and the electric core lower pressing plate support is connected with the electric core support plate.
Correspondingly, the method for cutting the multilayer isolating membrane of the lithium battery comprises the following steps:
s1, placing a plurality of battery cells connected with an isolating membrane on a battery cell lower pressing plate;
s2, arranging the battery cell upper pressing plates on a plurality of battery cells;
s3, sliding the battery cell supporting plate on the sliding rail to enable a plurality of battery cells to move along with the sliding of the battery cell supporting plate, and enabling the battery cells to reach proper positions;
s4, driving the laser head module to move left and right on the cross beam through the screw rod type electric cylinder to enable the laser head module to reach a target position;
s5, controlling the transmission assembly through a servo motor to drive the nozzle to move up and down, and enabling the laser head module to reach a target position;
and S6, driving the nozzle laser head module to move by the screw rod type electric cylinder to realize cutting of the multilayer isolating membrane.
Compared with the prior art, the invention can greatly reduce the splashing of the isolating membrane ceramic and improve the appearance of the cut surface by introducing the laser technology, thereby reducing the self-discharge risk of the battery cell and improving the safety coefficient of the battery cell.
Drawings
FIG. 1 is a schematic diagram of a cutting device for a multi-layer separator of a lithium battery according to one embodiment;
FIG. 2 is a schematic structural diagram of a laser head module according to a first embodiment;
fig. 3 is a schematic diagram of a plurality of battery cells according to the first embodiment.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
The invention aims to provide a cutting device and a cutting method for a multilayer isolating membrane of a lithium battery, aiming at the defects of the prior art.
Example one
The embodiment provides a cutting device for multilayer isolating membranes of lithium batteries, which comprises a fixing plate 1, a support, a laser head module 5, a screw rod type electric cylinder 6, an electric core upper pressing plate 7, an electric core supporting frame, an electric core supporting plate 10, a slide rail 11 and a plurality of electric cores 2 connected through isolating membranes 2-1, as shown in fig. 1-3; wherein the laser head module 5 comprises a transmission component 5-1, a servo motor 5-2 and a nozzle 5-3; the support comprises a cross beam 4 and vertical supports 3 arranged at two ends of the cross beam 4; the battery cell support frame comprises a battery cell lower pressing plate 8 and a battery cell lower pressing plate support 9.
One end of each of the two vertical supports 3 is fixedly locked and installed on two sides of the fixed plate 1 respectively, the other end of each of the two vertical supports 3 is connected with the cross beam 4 in a locking mode through a bolt, the lead screw type electric cylinder 6 is fixedly installed below the cross beam 4, and the laser head module 5 is fixedly locked on a sliding table of the lead screw type electric cylinder 6, so that the lead screw type electric cylinder 6 drives the laser head module 5 to move left and right (namely, x-axis movement); in a space enclosed by the bracket and the fixing plate, a slide rail 11 is fixedly arranged on the fixing plate 1, and a slide groove matched with the slide rail 11 is arranged below the cell support plate 10, so that the slide rail 11 is connected with the slide groove, and the cell support plate 10 slides back and forth (namely moves along the y axis) on the slide rail 11; on cell holding down plate support 9 was fixed in cell backup pad 10, on cell holding down plate 8 was fixed in cell holding down plate support 9, on cell holding down plate 8 was arranged in to several electric core 2, on electric core 2 was arranged in to electric core top board 7 to make several electric core 2 along with the slip of cell backup pad 10 and remove.
In this embodiment, the number of the cell lower pressing plate brackets is 4, and the cell lower pressing plates are supported by the 4 brackets, so that the cells are stably arranged on the cell supporting frame; the number of the cell upper pressing plates corresponds to that of the cells, so that one cell upper pressing plate can press one cell.
The nozzle in the laser head module sets up in the drive assembly below, and servo motor sets up in drive assembly one side to make servo motor control drive assembly and then drive the nozzle and reciprocate (z axle removes promptly), realize that the laser head removes at upper and lower direction short distance, thereby adjust the distance between nozzle and the several electricity core.
In the embodiment, a distance sensor and a control unit are also arranged in the laser head module; the distance sensor is used for detecting the distance from the nozzle to the isolating membrane; the control unit is used for controlling the transmission assembly and the servo motor to work.
The usage of the cutting device for the multilayer isolating film of the lithium battery in the embodiment is as follows:
fixedly mounting a bracket on a fixed plate, mounting a screw rod type electric cylinder on a cross beam of the bracket, and mounting a laser head module on the screw rod type electric cylinder; fixedly installing a slide rail on a fixing plate, slidably connecting a cell support plate with the slide rail, and fixedly arranging a cell support frame on the cell support plate;
after the multi-cell lamination is completed, a plurality of cells connected with the isolating film are arranged on the cell lower pressing plate, a cell upper pressing plate is arranged on each cell of the plurality of cells, and the laser head module is driven to move left and right on the cross beam through the screw rod type electric cylinder so as to reach a target position; starting a distance sensor on the laser head module to detect the distance from the nozzle to the multilayer isolating film, feeding the detected distance information back to the control unit, and controlling the transmission assembly and the servo motor by the control unit to automatically adjust the height of the nozzle so as to adapt to the laser cutting height; after the function start is decided to laser, lead screw formula electricity jar drives the nozzle and removes along the x axle direction, and then decides multilayer barrier film.
After an electricity core barrier film cuts the completion, will cut the electric core of completion through electric core manipulator and tak away, all the other electric cores pass through electric core backup pad and remove an electricity core width to the y axle on the slide rail, and then begin the operation of deciding of next electric core multilayer barrier film.
Compared with the prior art, this embodiment is through the introduction with laser technology, avoids traditional contact of barrier film and decides the mode (cold cut or hot cut), can greatly reduce barrier film pottery and splash, promotes the section outward appearance to reduce electric core self discharge risk, improve the factor of safety of electric core.
Example two
The embodiment provides a cutting method of a multilayer isolating membrane of a lithium battery, which comprises the following steps:
s1, placing a plurality of battery cells connected with an isolating membrane on a battery cell lower pressing plate;
s2, arranging the battery cell upper pressing plates on a plurality of battery cells;
s3, sliding the battery cell supporting plate on the sliding rail to enable a plurality of battery cells to move along with the sliding of the battery cell supporting plate, and enabling the battery cells to reach proper positions;
s4, driving the laser head module to move left and right on the cross beam through the screw rod type electric cylinder to enable the laser head module to reach a target position;
s5, controlling the transmission assembly through a servo motor to drive the nozzle to move up and down, and enabling the laser head module to reach a target position;
and S6, driving the nozzle laser head module to move by the screw rod type electric cylinder to realize cutting of the multilayer isolating membrane.
It should be noted that the method for cutting a multilayer lithium battery separator provided in this embodiment is similar to that in the embodiment, and thus, the description thereof is omitted here.
Compared with the prior art, this embodiment can greatly reduce barrier film pottery and splash through the introduction with laser technology, promotes the section outward appearance to reduce electric core self discharge risk, improve the factor of safety of electric core.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (5)

1. A cutting device for multilayer isolating membranes of lithium batteries is characterized by comprising a fixing plate, a bracket, a laser head module, a screw rod type electric cylinder, an electric core upper pressing plate, an electric core supporting frame, an electric core supporting plate, a slide rail and a plurality of electric cores connected through isolating membranes;
the bracket is fixedly arranged on the fixed plate; the slide rail is fixedly arranged on the fixed plate; the screw rod type electric cylinder is fixedly arranged on the bracket, and the laser head module is locked and fixed on a sliding table of the screw rod type electric cylinder so as to enable the screw rod type electric cylinder to drive the laser module to move; the electric core upper press plate is arranged on the electric core, the electric core support frame is arranged on the electric core support frame, the electric core support frame is fixedly arranged on the electric core support plate, and the electric core support plate is connected with the slide rail in a sliding mode, so that the electric core of the plurality moves along with the sliding of the electric core support plate.
2. The cutting device for the multilayer isolating film of the lithium battery as claimed in claim 1, wherein the laser head module comprises a transmission assembly, a servo motor and a nozzle, the nozzle is disposed below the transmission assembly, and the servo motor is disposed at one side of the transmission assembly, so that the servo motor controls the transmission assembly to drive the nozzle to move.
3. The cutting device for the multilayer isolating film of the lithium battery as claimed in claim 1, wherein the support comprises a cross beam and vertical supports arranged at two ends of the cross beam; the vertical support is fixedly arranged on the fixing plate, and the screw rod type electric cylinder is fixedly arranged on the cross beam.
4. The cutting device for multilayer lithium battery separators according to claim 1, wherein the cell support frame comprises a cell hold-down plate and a cell hold-down plate support, the cell hold-down plate and the cell hold-down plate support are fixedly connected, a plurality of cells are arranged on the cell hold-down plate, and the cell hold-down plate support is connected with the cell support plate.
5. A cutting method of a lithium battery multilayer separation film, which is characterized by comprising the cutting device of the lithium battery multilayer separation film of any one of claims 1 to 4; the cutting method comprises the following steps:
s1, placing a plurality of battery cells connected with an isolating membrane on a battery cell lower pressing plate;
s2, arranging the battery cell upper pressing plates on a plurality of battery cells;
s3, sliding the battery cell supporting plate on the sliding rail to enable a plurality of battery cells to move along with the sliding of the battery cell supporting plate, and enabling the battery cells to reach proper positions;
s4, driving the laser head module to move left and right on the cross beam through the screw rod type electric cylinder to enable the laser head module to reach a target position;
s5, controlling the transmission assembly through a servo motor to drive the nozzle to move up and down, and enabling the laser head module to reach a target position;
and S6, driving the nozzle laser head module to move by the screw rod type electric cylinder to realize cutting of the multilayer isolating membrane.
CN202111288101.XA 2021-11-02 2021-11-02 Cutting device and cutting method for multilayer isolating film of lithium battery Pending CN114054975A (en)

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Application Number Priority Date Filing Date Title
CN202111288101.XA CN114054975A (en) 2021-11-02 2021-11-02 Cutting device and cutting method for multilayer isolating film of lithium battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111288101.XA CN114054975A (en) 2021-11-02 2021-11-02 Cutting device and cutting method for multilayer isolating film of lithium battery

Publications (1)

Publication Number Publication Date
CN114054975A true CN114054975A (en) 2022-02-18

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102582263A (en) * 2011-01-13 2012-07-18 精工爱普生株式会社 Silicon device and silicon device manufacturing method
CN105195902A (en) * 2015-10-15 2015-12-30 浙江欧威科技有限公司 PCB dry film circuit digitized film cutting machine
US20160149180A1 (en) * 2013-06-19 2016-05-26 Hitachi Automotive Systems, Ltd. Battery module
WO2020259693A1 (en) * 2019-06-28 2020-12-30 蜂巢能源科技有限公司 Lamination method used for battery cell fabrication and battery cell electrode group fabrication device
CN213916693U (en) * 2020-11-17 2021-08-10 合肥创想能源环境科技有限公司 Membrane separation device in lithium battery production process
CN214185753U (en) * 2020-12-12 2021-09-14 江苏觅科激光设备有限公司 Laser cutting equipment is used in production of lithium cell diaphragm

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102582263A (en) * 2011-01-13 2012-07-18 精工爱普生株式会社 Silicon device and silicon device manufacturing method
US20160149180A1 (en) * 2013-06-19 2016-05-26 Hitachi Automotive Systems, Ltd. Battery module
CN105195902A (en) * 2015-10-15 2015-12-30 浙江欧威科技有限公司 PCB dry film circuit digitized film cutting machine
WO2020259693A1 (en) * 2019-06-28 2020-12-30 蜂巢能源科技有限公司 Lamination method used for battery cell fabrication and battery cell electrode group fabrication device
CN213916693U (en) * 2020-11-17 2021-08-10 合肥创想能源环境科技有限公司 Membrane separation device in lithium battery production process
CN214185753U (en) * 2020-12-12 2021-09-14 江苏觅科激光设备有限公司 Laser cutting equipment is used in production of lithium cell diaphragm

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