WO2022170780A1 - 叠片机 - Google Patents

叠片机 Download PDF

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Publication number
WO2022170780A1
WO2022170780A1 PCT/CN2021/123899 CN2021123899W WO2022170780A1 WO 2022170780 A1 WO2022170780 A1 WO 2022170780A1 CN 2021123899 W CN2021123899 W CN 2021123899W WO 2022170780 A1 WO2022170780 A1 WO 2022170780A1
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WO
WIPO (PCT)
Prior art keywords
lamination
sheet
sheet material
strip
composite
Prior art date
Application number
PCT/CN2021/123899
Other languages
English (en)
French (fr)
Inventor
姚军付
Original Assignee
无锡先导智能装备股份有限公司
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 无锡先导智能装备股份有限公司 filed Critical 无锡先导智能装备股份有限公司
Priority to EP21920104.3A priority Critical patent/EP4084176A4/en
Priority to KR1020227027525A priority patent/KR20220124247A/ko
Priority to US17/857,094 priority patent/US20220336840A1/en
Publication of WO2022170780A1 publication Critical patent/WO2022170780A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • 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
    • H01M10/0413—Large-sized flat cells or batteries for motive or stationary systems with 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
    • H01M10/04—Construction or manufacture in general
    • H01M10/0436—Small-sized flat cells or batteries for portable equipment
    • 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
    • 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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/04—Processes of 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
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/005—Devices for making primary cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/26—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer which influences the bonding during the lamination process, e.g. release layers or pressure equalising layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/515—Cutting handled material
    • B65H2301/5153—Details of cutting means
    • B65H2301/51536—Laser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • 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 preparation, in particular to a lamination machine.
  • the lithium battery preparation process includes a step of lamination.
  • the current lamination is usually to first cut the strip-shaped pole piece to form a sheet, and then attach the sheet and the separator to form a composite strip, and then pass the lamination device to the composite strip.
  • the tape is folded to complete the lamination step.
  • the sheet material and the diaphragm form a composite tape by directly attaching the sheet material to the diaphragm and then compounding by heating and pressing the PET (Polyester, polyester fiber) film in an oven, which requires consumption of the PET film, and the cost is relatively high. high.
  • a lamination machine comprising:
  • a heating device is used to heat a first composite material strip
  • the first composite material strip includes a first diaphragm, a first electrode material belt and a second diaphragm arranged in layers, and the first electrode material belt has a plurality of edges along the the folds of the first electrode material strips are arranged at intervals along the length direction and extend along the width direction;
  • a first sheet material device arranged downstream of the heating device, the first sheet material device is used for providing a first sheet to the surface of the heated first separator facing away from the first electrode material belt material;
  • a second sheet material device is arranged downstream of the heating device, and the second sheet material device is used for providing a second sheet to the heated side surface of the second separator facing away from the first electrode material belt materials;
  • the first compounding device includes a heating mechanism and a rolling mechanism, the heating mechanism is arranged downstream of the first sheet material device and the second sheet material device, and is used for laminating the first sheet material and the second sheet material device.
  • the first composite material belt of the second sheet material is heated, and the rolling mechanism is arranged downstream of the heating mechanism for laminating the first sheet material and the second sheet material.
  • the first composite material strip is subjected to a rolling process to form a second composite material belt.
  • the adhesives on both sides of the first composite material strip are heated and melted by the heating device, and then the first sheet material and the second sheet material are respectively mixed with the first sheet material and the second sheet material by the first sheet material device and the second sheet material device. Opposite sides of a composite tape are laminated, and then processed by the first composite device to form a second composite tape. Since the adhesive has been melted, the strength of the first sheet material and the second sheet material and the first composite material tape can be guaranteed, and the displacement after the first sheet material and the second sheet material and the first composite material tape are avoided , to improve the quality of the battery.
  • the heating mechanism and the rolling mechanism are used to sequentially heat and roll the first sheet, the first composite tape and the second sheet.
  • the heating mechanism and the rolling mechanism are used to sequentially heat and roll the first sheet, the first composite tape and the second sheet.
  • the composite method of the PET film and the oven there is no need to set the PET film, reducing the cost of The cost of the PET film and the setting of the PET film unwinding mechanism and the PET film winding mechanism is low, and the production cost is low, and there is no need to set a long oven, which improves the compounding efficiency and has high production efficiency.
  • the lamination machine further includes a second compounding device, the second compounding device including:
  • a first electrode material strip unwinding mechanism for releasing the first electrode material strip
  • a crease mechanism disposed downstream of the first electrode strip unwinding mechanism, for forming a plurality of the crease on the first electrode strip along the way;
  • a first compounding mechanism arranged between the crease mechanism and the heating device, for compounding the first diaphragm and the second diaphragm on opposite sides of the first electrode material strip and forming the first compounding material bring.
  • the creasing mechanism comprises a laser cutting head or cutter.
  • the folds are through holes that are sequentially spaced along the width direction of the first electrode material strip and penetrate the first electrode material strip along the thickness direction thereof.
  • the through holes include one or more of circular holes, rectangular holes or strip-shaped holes.
  • the crease is a folded area extending longitudinally along the width direction of the first electrode material strip, and the thickness of the folded area of the first electrode material strip is smaller than that of other positions.
  • the first compounding device further includes a feeding mechanism, the feeding mechanism is arranged upstream of the heating mechanism, and is used for attaching the first sheet material and the second sheet material to on opposite sides of the first composite strip.
  • a folded sheet is formed between two adjacent folds on the first electrode material strip
  • the second composite tape includes a plurality of first stack assemblies and a plurality of second stack assemblies, and the first stack assemblies are alternately connected with the second stack assemblies, the first stack assemblies including sequentially stacked
  • the first sheet material, the first membrane, the folded sheet and the second membrane, and the second stacking assembly includes the second sheet material, the second membrane, and the folded sheet stacked in sequence and the first diaphragm;
  • the lamination machine further includes a lamination device, the lamination device is arranged downstream of the rolling mechanism, and is used to fold the second composite material strip along the fold, so as to fold a plurality of the The first stack assembly and a plurality of the second stack assemblies are alternately stacked to form a battery core.
  • a folded sheet is formed between two adjacent folds on the first electrode material strip
  • the second composite tape includes a plurality of third stacking components and a plurality of fourth stacking components, and the third stacking components and the fourth stacking components are alternately connected, and the third stacking components the first sheet material, the first membrane, the folded sheet, the second membrane and the second sheet material, and the fourth lamination assembly includes the first membrane and the folded sheet stacked in sequence and the second diaphragm;
  • the lamination machine further includes a lamination device, the lamination device is arranged downstream of the rolling mechanism, and is used to fold the second composite material strip along the fold, so as to fold a plurality of the The third stack assembly and a plurality of the fourth stack assemblies are alternately stacked to form a battery core.
  • the lamination device includes a lamination stage and a clamping jaw
  • the lamination stage is disposed downstream of the rolling mechanism, and the lamination stage can reciprocate along the vertical direction, so
  • the clamping jaw moves back and forth between the discharge end of the rolling mechanism and the lamination table, and is used to clamp the second composite material strip and fold and place the second composite material strip on the on the lamination table.
  • Fig. 1 is the principle schematic diagram of PET film and oven composite pole piece and diaphragm in the prior art
  • FIG. 2 is a schematic structural diagram of a second composite device according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of the first electrode material strip processed by the crease mechanism in the second composite device shown in FIG. 2;
  • FIG. 4 is a schematic structural diagram of a lamination machine provided by an embodiment of the application.
  • Embodiment 5 is a schematic structural diagram of the lamination machine provided in Embodiment 1 of the present application.
  • FIG. 6 is a schematic structural diagram of a lamination machine provided in Embodiment 2 of the present application.
  • FIG. 7 is a schematic structural diagram of the lamination machine provided in Embodiment 3 of the present application in a state
  • FIG. 8 is a schematic structural diagram of the lamination machine shown in FIG. 7 in another state
  • FIG. 9 is a schematic structural diagram of the lamination machine shown in FIG. 7 in still another state.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature.
  • plurality means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
  • installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit.
  • a first feature "on” or “under” a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch.
  • the first feature being “above”, “over” and “above” the 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 level higher than the second feature.
  • the first feature being “below”, “below” and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
  • the current lamination machine using PET film and an oven includes a pole piece unwinding mechanism 1, a PET film unwinding mechanism 2, and a PET film rewinding mechanism.
  • the mechanism 3 and the oven assembly 4 realize the compounding of the sheet material and the diaphragm 6, that is, the oven assembly 4 with the PET film 5 is arranged on both sides of the diaphragm 6, and the PET film 5 is released by the PET film unwinding mechanism 1, and is released by the PET film.
  • the film winding mechanism 2 is wound to move with the diaphragm 6 and the pole piece, and presses the pole piece on the diaphragm 6 during the movement to avoid the pole piece from shifting, and the oven assembly 4 pairs the PET film 5 and the two-layer PET film
  • the diaphragm 6 and the pole piece between 5 are heated and pressurized, so as to realize the combination of the pole piece and the diaphragm 6 .
  • the second compounding device 10 provided by an embodiment of the present application includes a first electrode material tape unwinding mechanism 11 , a crease mechanism 12 and a first compounding mechanism 13 , and a first electrode material tape unwinding mechanism 11 .
  • the crease mechanism 12 is disposed downstream of the first electrode strip unwinding mechanism 11
  • the first compound mechanism 13 is disposed downstream of the crease mechanism 12 .
  • the crease mechanism 12 is used to form a plurality of creases on the first electrode material strip 201 that are spaced along the length direction of the first electrode material strip 201 and extend along its width direction, and the first compound mechanism 13 is used to The opposite sides of the electrode strip 201 are composited with the first separator 202 and the second separator 203 to form the first composite strip 200 .
  • the first electrode material strip 201 is a strip-shaped pole piece.
  • the crease mechanism 12 forms a plurality of creases on the first electrode strip 201 , and the first diaphragm 202 and the second diaphragm 203 are attached to both sides of the first electrode strip 201 to form
  • the first composite material strip 200 may be directly folded along the crease during the process of folding the first composite material strip 200 .
  • the second composite device 10 directly uses strip-shaped pole pieces without cutting, which effectively improves the efficiency of subsequent lamination. At the same time, more burrs can be avoided from cutting the pole pieces, and the quality of the battery is improved.
  • the second composite device 10 is used to form the first composite material strip 200.
  • the first electrode material strip 201 in the first composite material strip 200 has multiple folds, so as to facilitate subsequent folding
  • the first composite material tape 200 is folded, it can be selected according to the actual process.
  • a pole piece is laid on the first composite material tape 200 and then folded to form a battery cell, which is not repeated in this embodiment.
  • the hardness of the pole piece is higher than that of the first diaphragm 202 and the second diaphragm 203.
  • the existing stacking method is to fold the pole piece in the form of a sheet material. In this embodiment, it is convenient to display the pole piece.
  • the strip-shaped pole piece is folded, so a crease is formed on the first electrode material strip 201 , that is, the strip-shaped pole piece.
  • the second compounding device 10 further includes a first diaphragm unwinding mechanism 14 disposed upstream of the first compounding mechanism 13 for releasing the first diaphragm 202 . Further, the second compounding device 10 further includes a second diaphragm unwinding mechanism 15 , and the second diaphragm unwinding mechanism 15 is disposed upstream of the first compounding mechanism 13 for releasing the second diaphragm 203 .
  • the crease mechanism 12 includes a laser cutting head or cutter, both for forming creases along its width and a plurality of creases along its length on the strip-shaped pole piece The directions are evenly spaced.
  • the folds on the strip-shaped pole piece may be a through hole opened on the pole piece by a laser cutting head or a cutter, and the through hole runs along the first
  • the electrode material strips 201 are arranged at intervals in the width direction and pass through the first electrode material strip 201 along the thickness direction.
  • the through holes include one or more of circular holes, rectangular holes and strip holes.
  • the crease is a folded area extending longitudinally along the width direction of the first electrode material strip 201 , and part of the toner in the dotted area is removed by laser, so that the The toner layer is less than the toner layer at other positions, that is, the thickness of the folded region of the first electrode material strip 201 is smaller than that of other positions, resulting in the weakening of the strength of the region, which facilitates folding.
  • the surfaces on the opposite sides of the first separator 202 and the second separator 203 are provided with adhesives. After being preliminarily bonded together, through the heating and pressure of the first compounding mechanism 13, that is, compounding treatment, the adhesive is melted, and the first diaphragm 202 and the second diaphragm 203 are bonded together with the strip-shaped pole piece to form the first diaphragm. Composite tape 200. At the same time, during subsequent folding, the adhesive on the side surfaces of the first diaphragm 202 and the second diaphragm 203 away from the strip-shaped pole piece can also ensure adhesion and fixation during folding.
  • the first compounding mechanism 13 includes a first heating component 131 and a first rolling component 132 , and the first heating component 131 is used for the first separator 202 , the first electrode material strip 201 and the second separator 203 . heating to melt the adhesive on the surfaces of the first membrane 202 and the second membrane 203, and the first rolling component 132 is used to roll the first membrane 202, the first electrode strip 201 and the second membrane 203, so that the The three are pasted together to form the first composite tape 200 .
  • the first compounding mechanism 13 further includes a feeding assembly 133 .
  • the feeding assembly 133 is disposed downstream of the crease mechanism 12 and upstream of the first heating assembly 131 for releasing the first diaphragm unwinding mechanism 14 .
  • the membrane 202, the second membrane 203 released by the second membrane unwinding mechanism 15, and the first electrode strip 201 released by the first electrode strip unwinding mechanism 11 are guided to make the first membrane 202 and the second membrane 203 stick to each other.
  • On opposite sides of the first electrode material strip 201 On opposite sides of the first electrode material strip 201 .
  • the feeding assembly 133 is guided to the first diaphragm 202, the first electrode material strip 201 and the second diaphragm 203 by two feeding rollers, respectively, and the first heating assembly 131 can pass the heating block to the first diaphragm 202, the An electrode material strip 201 and the second diaphragm 203 are heated, and the first rolling assembly 132 can be two pressure rollers to clamp the outer sides of the first diaphragm 202 and the second diaphragm 203, so that the first diaphragm 202 and the first electrode material belt are heated. 201 and the second diaphragm 203 are rolled.
  • the present application further provides a lamination machine 100 , the lamination machine includes a heating device 41 , a first sheet material device 20 and a second sheet material device 30 , and the heating device 41 is used for heating the first composite tape. 200 is heated, the first sheet material device 20 and the second sheet material device 30 are both arranged downstream of the heating device 41, and the first sheet material device 20 is used to provide a side surface of the heated first composite material belt 200. The first sheet material 301 and the second sheet material device 30 are used to provide the second sheet material 302 to the other side surface of the heated first composite material tape 200 .
  • the lamination machine further includes a first compounding device 42, the first compounding device 42 includes a heating mechanism 421 and a rolling mechanism 422, and the heating mechanism 421 is arranged downstream of the first sheet material device 20 and the second sheet material device 30, For heating the first composite material belt 200 with the first sheet material 301 and the second sheet material 302 attached, the rolling mechanism 422 is arranged downstream of the heating mechanism 421 for heating the first sheet material 301 attached thereto.
  • the first composite web 200 of the second sheet 302 is rolled to form a second composite web.
  • the first composite tape 200 is formed by compounding the second composite device 10 in the foregoing embodiment, so the first composite tape 200 includes the first separator 202 , the first electrode tape 201 and the second separator 203 which are arranged in layers. .
  • the first sheet material device 20 is used to provide the first sheet material 301 to the side surface of the heated first separator 202 facing away from the first electrode material strip 201
  • the second sheet material device 30 is used to provide the heated first sheet material 301 to the heated
  • the second sheet material 302 is provided on the side surface of the second separator 203 facing away from the first electrode material strip 201 .
  • both sides of the first composite tape 200 also have adhesives.
  • the adhesives on both sides of the first composite material tape 200 are heated and melted by the heating device 41, and then the first sheet material device 20 and the second sheet material device 30 respectively melt the first sheet material 301 and the second sheet material
  • the two pieces of material 302 are attached to opposite sides of the first composite material tape 200 , and then processed by the first compounding device 42 to form a second composite material tape.
  • the strength of the first sheet material 301 and the second sheet material 302 and the first composite material tape 200 can be guaranteed, and the first sheet material 301 and the second sheet material 302 can be prevented from being attached to the first composite material tape. Displacement occurs after 200 bonding, which improves the quality of the cell.
  • the heating mechanism 421 and the rolling mechanism 422 are used to sequentially heat and roll the first sheet material 301, the first composite material tape 200 and the second sheet material 302. Compared with the composite method of the PET film and the oven, no setting is required.
  • the PET film reduces the cost of the PET film and the setting of the PET film unwinding mechanism and the PET film winding mechanism, the production cost is low, and a long oven is not required, the compounding efficiency is improved, and the production efficiency is high.
  • first compounding mechanism 13 in the second compounding device 10 will be heated by the first heating element 131 when compounding the first diaphragm 202 , the first electrode material strip 201 and the second diaphragm 203 , but the compound formed A composite material belt 200 will be cooled during the conveying process, so a heating device 41 is subsequently provided upstream of the first sheet material device 20 and the second sheet material device 30 to heat the first composite material belt 200 .
  • the heating mechanism 421 is arranged upstream of the rolling mechanism 422 to heat before rolling, so that the first sheet 301 and the second sheet 302 are heated. It is in close contact with the first composite tape 200 .
  • the adhesives on both sides of the first diaphragm 202 and the second diaphragm 203 are usually heat-sensitive adhesives, and the heating device 41 heats the first composite tape 200 to activate the activity of the heat-sensitive adhesives and prevent the heat-sensitive adhesives during transportation.
  • the temperature decreases, which affects the adhesive force of the heat-sensitive adhesive, ensuring that the first sheet 301 and the second sheet 302 are tightly and stably attached to both sides of the first composite tape 200, avoiding the first sheet 301 and the second sheet 302.
  • the sheet 302 is displaced.
  • the heating mechanism 421 in the first compound device 42 heats the first compound tape 200 on which the first sheet 301 and the second sheet 302 are attached, so as to maintain the activity of the heat-sensitive adhesive and avoid the conveying process.
  • the lowering of the medium temperature affects the adhesive force of the heat-sensitive adhesive, so that the first sheet material 301 and the second sheet material 302 and the first composite material tape 200 are closely attached under the pressure of the rolling mechanism 422 .
  • the heating device 41 includes two heating blocks between which the first composite tape 200 passes, and the two heating blocks are used to heat the first composite tape 200 .
  • the heating device 41 may also be a heating roller, which is not limited herein.
  • the heating mechanism 421 can also be a heating block or a heating roller.
  • the first sheet material 301 and the second sheet material 302 are prone to occur during subsequent conveying or rolling. displacement.
  • the first sheet material device 20 includes a second electrode tape unwinding mechanism 21 and a first cutting mechanism 22 , the second electrode tape unwinding mechanism 21 is used for releasing the second electrode tape 400 , the first The cutting mechanism 22 is located downstream of the second electrode strip unwinding mechanism 21 , and the first cutting mechanism 22 is used for cutting the second electrode strip 400 to form the first sheet 301 .
  • the second sheet material device 30 includes a third electrode strip unwinding mechanism 31 and a second cutting mechanism 32 , the third electrode strip unwinding mechanism 31 is used to release the third electrode strip 500 , and the second cutting mechanism 32 Located downstream of the third electrode strip unwinding mechanism 31 , the second cutting mechanism 32 is used to cut the third electrode strip 500 to form the second sheet 302 .
  • the above-mentioned second electrode material strip 400 and third electrode material strip 500 are the same as the first electrode material strip 201, and they are all strip-shaped pole pieces, while the first cutting mechanism 22 and the second cutting mechanism 32 will After the second electrode material tape 400 and the third electrode material tape 500 are cut to form the first sheet material 301 and the second sheet material 302, respectively, the first sheet material 301 and the second sheet material 302 can be preliminarily attached to the first separator, respectively 202 and the second diaphragm 203. Alternatively, other mechanisms may be added to preliminarily attach the first sheet material 301 and the second sheet material 302 to the first diaphragm 202 and the second diaphragm 203 respectively, which is not limited herein.
  • the first compounding device 42 further includes a feeding mechanism 423 , the feeding mechanism 423 is disposed upstream of the heating mechanism 421 , and the feeding mechanism 423 is used for laminating the first sheet 301 and the second sheet 302 on opposite sides of the first composite strip.
  • the feeding mechanism 423 includes two feeding rollers, and the two feeding rollers are respectively used for attaching the first sheet material 301 and the second sheet material 302 to opposite sides of the first composite tape 200 .
  • the feeding mechanism 423, the heating mechanism 421 and the rolling mechanism 422 are integrated into the first compounding device 42, which makes the structure more compact. Compared with the compounding method of the PET film and the oven, there is no need to set up the PET film unwinding mechanism and the PET film rewinding mechanism. Mechanisms and longer ovens take up less space.
  • the crease mechanism 12 in the second composite device 10 forms a plurality of creases on the first electrode material strip 201, two adjacent folds on the first electrode material strip 201 A folded sheet is formed between.
  • the first sheet material 301 and the second sheet material 302 are both pole pieces, and when the first electrode material strip 201 is a negative electrode, the first sheet material 301 and the second sheet material 302 are both positive electrode pieces, and when the first electrode material When the belt 201 is a positive electrode, the first sheet 301 and the second sheet 302 are negative electrodes. While the first diaphragm 202 and the second diaphragm 203 may be the same.
  • the cells are the first sheet material 301 , the first diaphragm 202 , the folded sheet, the second diaphragm 203 , the second sheet material 302 , the second diaphragm 203 , the folded sheet and the first diaphragm 202 are sequentially stacked in a predetermined order.
  • the first sheet material 301 (the second sheet material 302 ) is a pole piece, and is one of a positive electrode and a negative electrode
  • the first electrode material strip 201 is the other one of the positive electrode and the negative electrode
  • the first sheet material 301 is a battery cell in which the separator, the positive electrode sheet, the separator and the negative electrode electrode sheet are stacked in sequence.
  • the first sheet material 301 and the second sheet material 302 are alternately arranged along the length direction of the first composite material tape 200 , and the adjacent first sheet material 301 along the length direction of the first composite material tape 200
  • One sheet 301 and the second sheet 302 correspond to two adjacent folded sheets, respectively.
  • first electrode material strip 201 a plurality of folds on the first electrode material strip 201 are evenly spaced along the length direction of the first electrode material strip 201 , and each first sheet material 301 and each second sheet material 302 are The folded sheets correspond, so all the first sheets 301 and all the second sheets 302 are evenly spaced along the length direction of the first electrode material strip 201 , that is, along the length direction of the first composite material strip 200 .
  • the distance between the two adjacent first sheets 301 along the length direction of the first composite material tape 200 is greater than the width of the second sheet material 302, and the two adjacent second sheets 302 along the first composite material tape
  • the spacing in the length direction of 200 is greater than the width of the first sheet 301 .
  • the width direction of the first sheet material 301 and the second sheet material 302 is the length direction of the first composite material tape 200 .
  • the second composite tape 303 includes a plurality of first stacking components 3031 and second stacking components 3032, the first stacking components 3031 and the second stacking components 3032 are alternately connected, and the first stacking components 3031 are sequentially stacked.
  • the first sheet 301 , the first membrane 202 , the folded sheet and the second membrane 203 , and the second stacking assembly 3032 includes the first membrane 202 , the folded sheet, the second membrane 203 and the second sheet 302 stacked in sequence.
  • the lamination machine further includes a first lamination device 50, which is disposed downstream of the rolling mechanism 422 and is used to fold the second composite material strip 303 along the folds, so as to A plurality of first stacking components 3031 and a plurality of second stacking components 3032 are alternately stacked to form the above-mentioned cell.
  • the first lamination device 50 includes a lamination table 51 , and the second composite material belt 303 is conveyed from top to bottom in a vertical direction and folded on the lamination table 51 .
  • the folding of the second composite material tape 303 may be realized by using an air blowing structure or a pusher bracket to cooperate with gravity, or the folding of the second composite material tape 303 may be realized by directly relying on gravity.
  • the air blowing structures are provided on both sides of the second composite material belt 303 , and the air blowing structures are located above the lamination table 51 , and the air blowing structures on both sides are conveyed on the second composite material belt 303 In the process of blowing alternately to the second composite material strip 303, because the first electrode material strip 201 has creases, the blowing structure blows the second composite material strip 303 to bend, thereby ensuring that the second composite material strip 303 is folded. 303 is folded on the lamination table 51 .
  • both sides of the second composite material belt 303 are provided with pusher brackets, and the pusher brackets are located above the lamination table 51 , and the pusher brackets on both sides are arranged in a vertical dislocation , and the pushing brackets on both sides can be close to each other to exert an external force in the opposite direction on the two adjacent folded sheets, so that the adjacent folded sheets are bent, so as to ensure that the second composite material tape 303 is folded on the lamination table 51 .
  • the lamination table 51 When directly relying on gravity, since the first electrode material strip 201 has creases, and the second composite material strip 303 is transported down to the lamination table 51 in the vertical direction, the lamination table 51 is provided with two baffles, Under the action of gravity, the first electrode material strip 201 will be bent and folded at the crease due to the restriction of the two baffles, so as to realize the folding of the second composite material strip 303 .
  • the second composite tape 303 includes a plurality of first stacking components 3031 and second stacking components 3032 , the first stacking components 3031 and the second stacking components 3032 are alternately connected, and the first stacking components 3032 are alternately connected.
  • 3031 includes a first sheet 301, a first membrane 202, a folded sheet and a second membrane 203 stacked in sequence
  • the second stack assembly 3032 includes a first membrane 202, a folded sheet, a second membrane 203 and a second sheet stacked in sequence 302.
  • the lamination machine further includes a second lamination device 60 , which is disposed downstream of the rolling mechanism 422 and is used to fold the second composite material strip 303 along the folds, so as to A plurality of first stacked components 3031 and a plurality of second stacked components 3032 are alternately stacked to form battery cells.
  • a second lamination device 60 which is disposed downstream of the rolling mechanism 422 and is used to fold the second composite material strip 303 along the folds, so as to A plurality of first stacked components 3031 and a plurality of second stacked components 3032 are alternately stacked to form battery cells.
  • the function of the second lamination device 60 in this embodiment is the same as that of the first lamination device 50 in the first embodiment.
  • the second lamination device 60 includes a lamination table 61 and a clamping jaw 62.
  • the lamination table 61 is disposed downstream of the rolling mechanism 422, and the lamination table 61 can reciprocate along the vertical direction. The discharging end of the mechanism 422 and the lamination table 61 move back and forth, for clamping the second composite material strip 303 and folding and placing the second composite material strip 303 on the lamination table 61 .
  • the second sheet material device 30 first sets the second sheet material 302 at the head end of the first composite material belt 200, and then the first sheet material device 20 places the first sheet material 301. It is placed on the first composite material belt 200, then the second sheet material 302 and the first sheet material 301 are placed in sequence, and are sequentially processed by the feeding mechanism 423, the heating mechanism 421 and the rolling mechanism 422 to form a second composite material. Strip 303.
  • the second stacked component 3032 is located at the head end, and the second composite tape 303 is alternately connected with a plurality of second stacked components 3032 and a plurality of first stacked components 3031 .
  • the clamping jaw 62 grabs the second composite material belt 303 at the discharge end of the rolling mechanism 422 and translates it to the lamination table 61.
  • the first diaphragm 202 of the first composite material belt 200 is in contact with the lamination table 61, that is, the first The second stacking assembly 3032 at the end is in contact with the stacking table 61, the stacking table 61 is lowered, and the clamping jaws 62 return to the discharge end of the rolling mechanism 422 to continue to grab the second second stacking assembly 3032.
  • the lamination table 61 is translated to move the grabbed second lamination assembly 3032 onto the lamination table 61.
  • the second lamination assembly 3032 at the head end of the second composite tape 303 also descends, and the clamp
  • the first stacking component 3031 adjacent to the second stacking component 3032 at the head end will cover the second stacking component 3032 at the head end, and grasp the second stacking component 3032 at the head end.
  • the taken second stacking component 3032 will also cover the first stacking component 3031, so as to realize folding.
  • the gripping method of the gripper jaws 62 is to capture at intervals of one stacking component, that is, there is one stacking component between the stacking component grasped each time and the stacking component grasped last time.
  • the clamping jaw 62 grasps the second second stacking component 3032 to the previous second stacking component When directly above the component 3032, the first stacked component 3031 between the two second stacked components 3032 will be folded.
  • the second composite tape 304 includes a plurality of third stacked components 3041 and a plurality of fourth stacked components 3042 , and the third stacked components 3041 and the fourth stacked components 3042 are alternated Connected, the third stack assembly 3041 includes the first sheet 301, the first membrane 202, the folded sheet, the second membrane 203 and the second sheet 302 stacked in sequence, and the fourth stack 3042 includes the first membrane 202, Fold the sheet and the second membrane 203 .
  • the lamination machine further includes a third lamination device 70 , which is disposed downstream of the rolling mechanism 422 and is used to fold the second composite material strip 304 along the folds, so as to A plurality of third stacked components 3041 and a plurality of fourth stacked components 3042 are alternately stacked to form battery cells.
  • a third lamination device 70 which is disposed downstream of the rolling mechanism 422 and is used to fold the second composite material strip 304 along the folds, so as to A plurality of third stacked components 3041 and a plurality of fourth stacked components 3042 are alternately stacked to form battery cells.
  • the third lamination device 70 includes a lamination table 71 and a clamping jaw 72.
  • the lamination table 71 is disposed downstream of the rolling mechanism 422, and the lamination table 71 can reciprocate along the vertical direction.
  • the discharge end of the pressing mechanism 422 and the lamination table 71 are reciprocated for clamping the second composite material tape 304 and folding and placing the second composite material belt 304 on the lamination table 71 .
  • the third lamination device 70 further includes a pressing plate 73, which can reciprocate in the vertical direction and is used to press the cells on the lamination table 71, so as to press the stacked first sheet 301, the second A composite material tape 200 , the second sheet material 302 and the first composite material tape 200 are pressed tightly to ensure that each layer structure in the cell is tightly attached.
  • a pressing plate 73 which can reciprocate in the vertical direction and is used to press the cells on the lamination table 71, so as to press the stacked first sheet 301, the second A composite material tape 200 , the second sheet material 302 and the first composite material tape 200 are pressed tightly to ensure that each layer structure in the cell is tightly attached.
  • the third lamination device 70 further includes a pressing knife 74 , and the pressing knife 74 can move along the lamination table 71 in the vertical direction, and can move relative to the lamination table 71 for pressing the piezoelectric core.
  • the pressing plate 73 presses the cell
  • the clamping jaws 72 are removed, and the pressing knife 74 Press down the cell and remove the pressing plate 73 to avoid loosening of the cell or displacement during lamination, which affects the accuracy of lamination.
  • the second lamination device 60 in Embodiment 2 may also be provided with a pressing plate and a pressing knife for pressing the cells.
  • a piece of second sheet material 302 is placed at the head end of the first composite tape 200 (corresponding to the position of the first folded sheet), and then The first sheet material 301 and the second sheet material 302 are placed on the first composite tape 200 corresponding to the third folded sheet, and then the first sheet material 301 and the second sheet material 302 are placed corresponding to the fifth folded sheet.
  • the first sheet material 301 and the second sheet material 302 are repeatedly placed every other folded sheet, and the first sheet material 301 and the second sheet material 302 placed each time correspond to the same folded sheet.
  • the first sheet 301 and the second sheet 302 are placed, they are sequentially processed by the feeding mechanism 423 , the heating mechanism 421 and the rolling mechanism 422 to form the second composite tape 304 .
  • the first end is the third stacked component 3041 with only the second sheet 302 .
  • the third laminated component 3041 of the second composite material tape 304 may be located at the head end, or the fourth laminated component 3042 may be located at the head end when folded.
  • the folding methods in the three embodiments are the same.
  • the first end of the folding is the third stacking component 3041 with only the second sheet 302 as an example for illustration:
  • the pressing plate 73 moves to avoid position, and the clamping jaw 72 grasps and translates the second composite material tape 304 at the discharge end of the rolling mechanism 422 to the lamination table 71.
  • the third stacking assembly 3041 with the second sheet material 302 is in contact with the stacking table 71, the pressing plate 73 is pressed down to press it down, and then the clamping jaws 72 are withdrawn and returned to the discharge end of the rolling mechanism 422 to continue to grab the first sheet.
  • the clamping jaw 72 grabs the second third stacking assembly 3041 and translates it to the stacking table 71 , the pressing knife 74 keeps pressing and descends with the stacking table 71 , the third stacking of the first end of the second composite material strip 304 The assembly 3041 descends accordingly, and when the clamping jaw 72 grabs the second third stacking assembly 3041 and translates it onto the lamination table 71, the fourth stacking assembly 3042 adjacent to the third stacking assembly 3041 at the head end will cover the head end. On the third stacking component 3041, and the grabbed second third stacking component 3041 also covers the fourth stacking component 3042, so as to realize folding.
  • the pressing plate 73 is pressed again, and then the clamping jaws 72 are withdrawn to continue to grab the third stacking component 3041.
  • the lamination table 71 is lowered.
  • the gripping method of the gripper jaws 72 is to capture at intervals of one stacking component, that is, there is a stacking component between the stacking component grasped each time and the stacking component grasped last time.
  • the clamping jaws 72 grasp the second third stacking assembly 3041 to the previous third stacking
  • the fourth stacked component 3042 between the two third stacked components 3041 will be folded.
  • the actions of the clamping jaws 72 and the lamination table 71 in the third lamination device 70 in this embodiment are the same as those of the clamping jaws 62 and the lamination table 61 in the second lamination device 60 in the second embodiment. The action is the same.
  • the first sheet material 301, the second sheet material 302 and the folded sheet in the above embodiment are all pole pieces, and the first diaphragm 202 and the second diaphragm 203 are both diaphragms, so they are folded
  • the battery cell formed later is actually a structure formed by stacking the pole piece and the separator multiple times.
  • Example 1 and Example 2 the structure of the second composite material tape is the same, so the same reference number is used to facilitate understanding, while the second composite material tape in Example 3 is the same as that in Example 1 and Example 2.
  • the structures in the s are different, so different labels are used to facilitate the distinction.
  • the preparation of the two second composite tapes can be realized by changing the pasting sequence of the first sheet material device 20 and the second sheet material device 30, which can be determined without any doubt by those skilled in the art according to the description in Example 3 of.
  • first lamination device 50 , the second lamination device 60 and the third lamination device 70 are all lamination devices for folding the second composite material strip
  • first lamination device 50 and the second stacking device 60 can be used to alternately stack a plurality of third stacking components and a plurality of fourth stacking components to form a cell
  • third stacking device 70 can also be used to stack a plurality of first stacking components and multiple stacking components.
  • the second stacked components are alternately stacked to form battery cores.
  • the first electrode material strip 201 is a negative electrode, and the first sheet material 301 and the second sheet material 302 are positive electrode sheets. In another specific embodiment, the first electrode material strip 201 is a positive electrode, and the first sheet material 301 and the second sheet material 302 are negative electrode sheets.

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Abstract

本申请涉及一种叠片机，包括加热装置、第一片料装置、第二片料装置及第一复合装置。通过采用该叠片机，第一复合料带两侧的粘合剂先通过加热装置加热融化，然后第一片料装置和第二片料装置分别将第一片料和第二片料与第一复合料带的相对两侧贴合，接下来通过第一复合装置处理形成第二复合料带。由于粘合剂已经融化，可以保证第一片料和第二片料与第一复合料带贴合的强度，避免第一片料和第二片料与第一复合料带贴合之后发生位移，提高电芯的质量。

Description

叠片机
相关申请
本申请要求2021年02月09日申请的，申请号为202110178705.2，名称为“叠片机”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
本申请涉及锂电池制备技术领域，特别是涉及一种叠片机。
背景技术
锂电池制备过程中包括一叠片的步骤，目前的叠片通常是先将带状的极片切断形成片料，然后将片料与隔膜贴合形成复合料带，然后通过叠片装置将复合料带折叠，从而完成叠片步骤。如图1所示，目前片料和隔膜形成复合料带是直接将片料贴合于隔膜然后通过烘箱和PET(Polyester，聚酯纤维)膜加热加压进行复合，需要消耗PET膜，成本较高。
发明内容
基于此，有必要针对现有的电芯制备成本较高的问题，提供一种无需消耗PET膜，降低成本的叠片机。
一种叠片机，包括：
加热装置，用于对第一复合料带进行加热，所述第一复合料带包括层叠设置的第一隔膜、第一电极料带及第二隔膜，所述第一电极料带具有多个沿所述第一电极料带的长度方向间隔排布且沿其宽度方向延伸的折痕；
第一片料装置，设置于所述加热装置的下游，所述第一片料装置用于向经过加热后的所述第一隔膜背离所述第一电极料带的一侧表面提供第一片料；
第二片料装置，设置于所述加热装置的下游，所述第二片料装置用于向经过加热后的所述第二隔膜背离所述第一电极料带的一侧表面提供第二片料；及
第一复合装置，包括加热机构及辊压机构，所述加热机构设置于所述第一片料装置和所述第二片料装置的下游，用于对贴合有所述第一片料和所述第二 片料的所述第一复合料带进行加热，所述辊压机构设置于所述加热机构的下游，用于对贴合有所述第一片料和所述第二片料的所述第一复合料带进行辊压处理，从而形成第二复合料带。
通过采用该叠片机，第一复合料带两侧的粘合剂先通过加热装置加热融化，然后第一片料装置和第二片料装置分别将第一片料和第二片料与第一复合料带的相对两侧贴合，接下来通过第一复合装置处理形成第二复合料带。由于粘合剂已经融化，可以保证第一片料和第二片料与第一复合料带贴合的强度，避免第一片料和第二片料与第一复合料带贴合之后发生位移，提高电芯的质量。
此外，通过加热机构和辊压机构依次对第一片料、第一复合料带以及第二片料进行加热和辊压，相较于PET膜和烘箱的复合方式，无需设置PET膜，降低了PET膜以及设置PET膜放卷机构以及PET膜收卷机构的成本，制作成本较低，而且无需设置较长的烘箱，提高了复合效率，生产效率高。
在其中一个实施例中，所述叠片机还包括第二复合装置，所述第二复合装置包括：
第一电极料带放卷机构，用于释放第一电极料带；
折痕机构，设置于所述第一电极料带放卷机构的下游，用于在途径的所述第一电极料带上形成多个所述折痕；及
第一复合机构，设置于所述折痕机构与所述加热装置之间，用于在所述第一电极料带的相对两侧复合第一隔膜和第二隔膜并形成所述第一复合料带。
在其中一个实施例中，所述折痕机构包括激光切割头或切刀。
在其中一个实施例中，所述折痕为沿所述第一电极料带的宽度方向依次间隔设置且沿其厚度方向贯穿所述第一电极料带的贯通孔。
在其中一个实施例中，所述贯通孔包括圆形孔、矩形孔或者条形孔中的一种或多种。
在其中一个实施例中，所述折痕为沿所述第一电极料带的宽度方向纵长延伸的折叠区域，所述第一电极料带的所述折叠区域的厚度小于其他位置的厚度。
在其中一个实施例中，所述第一复合装置还包括入料机构，所述入料机构 设置于所述加热机构的上游，用于将所述第一片料和所述第二片料贴合于所述第一复合料带的相对两侧。
在其中一个实施例中，所述第一电极料带上相邻的两个折痕之间形成折叠片；
所述第二复合料带包括多个第一层叠组件和多个第二层叠组件，且所述第一层叠组件与所述第二层叠组件交替连接，所述第一层叠组件包括依次层叠的所述第一片料、所述第一隔膜、所述折叠片及所述第二隔膜，所述第二层叠组件包括依次层叠的所述第二片料、所述第二隔膜、所述折叠片及所述第一隔膜；
所述叠片机还包括叠片装置，所述叠片装置设置于所述辊压机构的下游，用于对所述第二复合料带沿所述折痕进行折叠处理，以将多个所述第一层叠组件和多个所述第二层叠组件交替层叠形成电芯。
在其中一个实施例中，所述第一电极料带上相邻的两个折痕之间形成折叠片；
所述第二复合料带包括多个第三层叠组件及多个第四层叠组件，且所述第三层叠组件与所述第四层叠组件交替连接，所述第三层叠组件包括依次层叠的所述第一片料、所述第一隔膜、所述折叠片、所述第二隔膜及所述第二片料，所述第四层叠组件包括依次层叠的所述第一隔膜、所述折叠片及所述第二隔膜；
所述叠片机还包括叠片装置，所述叠片装置设置于所述辊压机构的下游，用于对所述第二复合料带沿所述折痕进行折叠处理，以将多个所述第三层叠组件和多个所述第四层叠组件交替层叠形成电芯。
在其中一个实施例中，所述叠片装置包括叠片台及夹爪，所述叠片台设置于所述辊压机构的下游，且所述叠片台沿竖直方向可往复移动，所述夹爪在所述辊压机构的出料端以及所述叠片台之间往复移动，用于夹持所述第二复合料带并将所述第二复合料带折叠且放置于所述叠片台上。
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为现有技术中PET膜和烘箱复合极片和隔膜的原理示意图；
图2为本申请一实施例提供的第二复合装置的结构示意图；
图3为图2所示的第二复合装置中的折痕机构处理过的第一电极料带的结构示意图；
图4为本申请一实施例提供的叠片机的结构示意图；
图5为本申请实施例1提供的叠片机的结构示意图；
图6为本申请实施例2提供的叠片机的结构示意图；
图7为本申请实施例3提供的叠片机处于一状态的结构示意图；
图8为图7所示的叠片机处于另一状态的结构示意图；
图9为图7所示的叠片机处于又一状态的结构示意图。
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。
为了便于理解本申请的技术方案，在此结合图1对现有技术进行说明：目前采用PET膜和烘箱的叠片机包括极片放卷机构1、PET膜放卷机构2、PET膜收卷机构3及烘箱组件4，实现片料和隔膜6的复合，即在隔膜6的两侧设置绕设有PET膜5的烘箱组件4，PET膜5通过PET膜放卷机构1释放，并由PET膜收卷机构2收卷，以随隔膜6和极片移动，并在移动过程中将极片压紧于隔膜6上，避免极片偏移，烘箱组件4对PET膜5以及两层PET膜5之间的隔膜6和极片加热加压，从而实现极片和隔膜6的复合。
采用PET膜和烘箱的方式在将极片复合于隔膜6上，需要消耗PET膜5，同时也需要设置PET膜放卷机构2放卷以及设置PET膜收卷机构3收卷，材料成本以及设备成本较高，体积过大，而烘箱组件4加热加压时为了达到合适的复合温度，要确保极片和隔膜在烘箱中加热较长的时间，因此需选择较长的烘箱，导致烘箱的成本较高，而且占用空间大，生产效率低。
如图2所示，本申请一实施例提供的第二复合装置10，包括第一电极料带放卷机构11、折痕机构12及第一复合机构13，第一电极料带放卷机构11用于释放第一电极料带201，折痕机构12设置于第一电极料带放卷机构11的下游，第一复合机构13设置于折痕机构12的下游。
折痕机构12用于在第一电极料带201上形成多个沿第一电极料带201的长度方向间隔排布且沿其宽度方向延伸的折痕，第一复合机构13用于在第一电极料带201的相对两侧复合第一隔膜202和第二隔膜203并形成第一复合料带200。
其中，第一电极料带201为带状的极片。
通过设置上述的第二复合装置10，折痕机构12在第一电极料带201上形成多个折痕，第一隔膜202和第二隔膜203贴合于第一电极料带201的两侧形成第一复合料带200，在折叠第一复合料带200的过程中，可以沿着折痕进行直接折叠。相较于现有的先将极片裁切成片料再进行叠片，该第二复合装置10直接使用带状的极片，无需裁切，有效地提高了后续叠片的效率。同时也可以避免裁断极片产生较多的毛刺，提高了电池的质量。
需要进行说明的是，第二复合装置10用于形成第一复合料带200，本实施例中第一复合料带200中的第一电极料带201具有多个折痕，从而方便后续的折叠，而第一复合料带200进行折叠时可根据实际的工艺选择，在第一复合料带200上铺设极片然后折叠以形成电芯，在本实施例中不作赘述。
此外，需要解释的是，极片的硬度比第一隔膜202以及第二隔膜203的硬度高，现有的叠片方式是对呈片料的极片进行折叠，而本实施例中是方便呈带状的极片进行折叠，故在第一电极料带201，即带状的极片上形成折痕。
在一些实施例中，第二复合装置10还包括第一隔膜放卷机构14，第一隔膜放卷机构14设置于第一复合机构13的上游，用于释放第一隔膜202。进一步地，第二复合装置10还包括第二隔膜放卷机构15，第二隔膜放卷机构15设置于第一复合机构13的上游，用于释放第二隔膜203。
在一些实施例中，折痕机构12包括激光切割头或切刀，激光切割头和切刀均用于在带状的极片上形成沿其宽度方向的折痕，而多个折痕沿其长度方向均匀间隔排布。
需要说明的是，如图3中的a图、b图和c图所示，带状的极片上的折痕可以是通过激光切割头或切刀在极片上开设贯通孔，贯通孔沿第一电极料带201的宽度方向依次间隔设置且沿其厚度方向贯穿第一电极料带201，贯通孔的形式包括圆形孔、矩形孔及条形孔中的一种或多种。
当然，也可以是如图3中的d图所示，折痕为沿第一电极料带201的宽度方向纵长延伸的折叠区域，通过激光去掉虚线区域内的部分碳粉，使得该区域的碳粉层少于其他位置的碳粉层，即第一电极料带201的折叠区域的厚度小于其他位置的厚度，导致该区域的强度减弱，方便折叠。
在一些实施例中，第一隔膜202与第二隔膜203的相对两侧的表面均具有粘合剂，在第一复合料带200中第一隔膜202及第二隔膜203与带状的极片初步贴合在一起之后，通过第一复合机构13的加热加压，即复合处理，粘合剂融化，第一隔膜202及第二隔膜203与带状的极片粘合在一起，形成第一复合料带200。同时，在后续进行折叠的时候，第一隔膜202及第二隔膜203背离带状的极片的一侧表面的粘合剂也能够确保折叠时粘接固定。
在一些实施例中，第一复合机构13包括第一加热组件131和第一辊压组件132，第一加热组件131用于对第一隔膜202、第一电极料带201及第二隔膜203进行加热，使得第一隔膜202与第二隔膜203表面的粘合剂融化，第一辊压组件132用于对第一隔膜202、第一电极料带201及第二隔膜203进行辊压，从而使得三者粘贴在一起形成第一复合料带200。
进一步地，第一复合机构13还包括入料组件133，入料组件133设置于折痕机构12下游，且位于第一加热组件131上游，用于对第一隔膜放卷机构14释放的第一隔膜202、第二隔膜放卷机构15释放的第二隔膜203以及第一电极料带放卷机构11释放的第一电极料带201进行导向处理，以使第一隔膜202和第二隔膜203贴合于第一电极料带201的相对两侧。
实际应用中，入料组件133通过两根入料辊分别对第一隔膜202、第一电极料带201及第二隔膜203导向，第一加热组件131可以通过加热块对第一隔膜202、第一电极料带201及第二隔膜203加热，第一辊压组件132可以是两根压力辊夹持第一隔膜202及第二隔膜203的外侧，从而对第一隔膜202、第一电极料带201及第二隔膜203进行辊压。
请参阅图4，本申请还提供一种叠片机100，该叠片机包括加热装置41、第一片料装置20及第二片料装置30，加热装置41用于对第一复合料带200进行加热，第一片料装置20和第二片料装置30均设置于加热装置41的下游，第一片料装置20用于向经过加热后的第一复合料带200的一侧表面提供第一片料301，第二片料装置30用于向经过加热后的第一复合料带200的另一侧表面提供第二片料302。
进一步地，叠片机还包括第一复合装置42，第一复合装置42包括加热机构421及辊压机构422，加热机构421设置于第一片料装置20和第二片料装置30的下游，用于对贴合有第一片料301和第二片料302的第一复合料带200进行加热，辊压机构422设置于加热机构421的下游，用于对贴合有第一片料301和第二片料302的第一复合料带200进行辊压处理，从而形成第二复合料带。
其中，第一复合料带200通过前述实施例中的第二复合装置10复合而成，故第一复合料带200包括层叠设置的第一隔膜202、第一电极料带201及第二隔膜203。
具体地，第一片料装置20用于向经过加热后的第一隔膜202背离第一电极料带201的一侧表面提供第一片料301，第二片料装置30用于向经过加热后的第二隔膜203背离第一电极料带201的一侧表面提供第二片料302。
由于第一隔膜202和第二隔膜203的两侧表面均具有粘合剂，故第一复合料带200的两侧表面也具有粘合剂。通过采用该叠片机，第一复合料带200两侧的粘合剂先通过加热装置41加热融化，然后第一片料装置20和第二片料装置30分别将第一片料301和第二片料302与第一复合料带200的相对两侧贴合，接下来通过第一复合装置42处理形成第二复合料带。由于粘合剂已经融化，可以保证第一片料301和第二片料302与第一复合料带200贴合的强度，避免第一片料301和第二片料302与第一复合料带200贴合之后发生位移，提高电芯的质量。
此外，通过加热机构421和辊压机构422依次对第一片料301、第一复合料带200以及第二片料302进行加热和辊压，相较于PET膜和烘箱的复合方 式，无需设置PET膜，降低了PET膜以及设置PET膜放卷机构以及PET膜收卷机构的成本，制作成本较低，而且无需设置较长的烘箱，提高了复合效率，生产效率高。
需要说明的是，第二复合装置10中的第一复合机构13复合第一隔膜202、第一电极料带201及第二隔膜203时会通过第一加热组件131进行加热，但是复合形成的第一复合料带200在输送过程中会冷却，故后续在第一片料装置20和第二片料装置30上游设置加热装置41对第一复合料带200进行加热。
同理可知，由于第一复合料带200输送的过程中会冷却，故设置加热机构421于辊压机构422的上游，以在辊压之前加热，使得第一片料301及第二片料302与第一复合料带200紧密贴合。
此外，第一隔膜202和第二隔膜203两侧表面的粘合剂通常为热敏胶，加热装置41对第一复合料带200进行加热，可激活热敏胶的活性，避免在输送过程中温度降低，影响热敏胶的粘合力，确保第一片料301和第二片料302紧密且稳定地贴合在第一复合料带200的两侧，避免第一片料301和第二片料302发生位移。而第一复合装置42中的加热机构421对贴合有第一片料301和第二片料302的第一复合料带200进行加热，可以维持热敏胶的活性，同时也可以避免输送过程中温度降低，影响热敏胶的粘合力，使得第一片料301和第二片料302与第一复合料带200在辊压机构422的压力下紧密地贴合。
在一些实施例中，加热装置41包括两个加热块，第一复合料带200穿过两个加热块之间，两个加热块用于对第一复合料带200加热。在另一些实施例中，加热装置41也可以是加热辊，在此不作限制。同理可知，加热机构421也可以是加热块或加热辊。
同时，如果没有预先加热提高第一片料301和第二片料302与第一复合料带的贴合强度，后续输送或辊压的时候，第一片料301和第二片料302容易发生位移。
在一些实施例中，第一片料装置20包括第二电极料带放卷机构21及第一切断机构22，第二电极料带放卷机构21用于释放第二电极料带400，第一切断机构22位于第二电极料带放卷机构21的下游，第一切断机构22用于对第二电极料带400进行裁切，以形成第一片料301。
进一步地，第二片料装置30包括第三电极料带放卷机构31及第二切断机构32，第三电极料带放卷机构31用于释放第三电极料带500，第二切断机构32位于第三电极料带放卷机构31的下游，第二切断机构32用于对第三电极料带500进行裁切，以形成第二片料302。
需要解释的是，上述的第二电极料带400和第三电极料带500与第一电极料带201相同，均为带状的极片，而第一切断机构22和第二切断机构32将第二电极料带400和第三电极料带500切断分别形成第一片料301和第二片料302后，可以将第一片料301和第二片料302分别初步贴合于第一隔膜202和第二隔膜203上。或者增设其他机构将第一片料301和第二片料302分别初步贴合于第一隔膜202和第二隔膜203上，在此不作限制。
在一些实施例中，第一复合装置42还包括入料机构423，入料机构423设置于加热机构421的上游，入料机构423用于将第一片料301和第二片料302贴合于第一复合料带的相对两侧。
具体地，入料机构423包括两根入料辊，两根入料辊分别用于将第一片料301和第二片料302贴合于第一复合料带200的相对两侧。
入料机构423、加热机构421以及辊压机构422集成为第一复合装置42，使得结构更加的紧凑，相较于PET膜和烘箱的复合方式，无需设置PET膜放卷机构、PET膜收卷机构以及较长的烘箱，占用空间更小。
进一步描述之前，需要说明的是，上述第二复合装置10中的折痕机构12在第一电极料带201上形成多个折痕之后，第一电极料带201上相邻的两个折痕之间形成折叠片。
第一片料301和第二片料302均为极片，且当第一电极料带201为负极时，第一片料301和第二片料302均为正极极片，当第一电极料带201为正极时，第一片料301和第二片料302为负极极片。而第一隔膜202和第二隔膜203可以是相同的。
如此，在折叠时，电芯为第一片料301、第一隔膜202、折叠片、第二隔膜203、第二片料302、第二隔膜203、折叠片及第一隔膜202依次层叠预定的数量形成。具体来说，第一片料301(第二片料302)为极片，且为正极和负极中的一种，第一电极料带201为正极和负极中的另一种，第一片料301、 第二片料302与第一复合料带200复合成第二复合料带并反复折叠之后，会形成隔膜、正极极片、隔膜和负极极片依次循环层叠的电芯。
请参阅图5，在实施例1中，第一片料301和第二片料302沿第一复合料带200的长度方向交替间隔排布，沿第一复合料带200长度方向相邻的第一片料301和第二片料302分别与相邻的两片折叠片对应。
需要解释的是，第一电极料带201上的多个折痕沿第一电极料带201的长度方向均匀间隔排布，而每一第一片料301和每一第二片料302均与折叠片对应，因此所有的第一片料301和所有的第二片料302均沿第一电极料带201的长度方向，即沿第一复合料带200的长度方向均匀间隔排布。
实际应用中，相邻的两片第一片料301沿第一复合料带200长度方向的间距大于第二片料302的宽度，相邻的两片第二片料302沿第一复合料带200长度方向的间距大于第一片料301的宽度。
需要说明的是，图5中，第一片料301和第二片料302的宽度方向为第一复合料带200的长度方向。
在本实施例中，第二复合料带303包括多个第一层叠组件3031和第二层叠组件3032，第一层叠组件3031与第二层叠组件3032交替连接，第一层叠组件3031包括依次层叠的第一片料301、第一隔膜202、折叠片及第二隔膜203，第二层叠组件3032包括依次层叠的第一隔膜202、折叠片、第二隔膜203及第二片料302。
在本实施例中，叠片机还包括第一叠片装置50，第一叠片装置50设置于辊压机构422的下游，用于对第二复合料带303沿折痕进行折叠处理，以将多个第一层叠组件3031和多个第二层叠组件3032交替层叠形成上述的电芯。
进一步地，第一叠片装置50包括叠片台51，第二复合料带303沿竖直方向从上往下输送并在叠片台51上进行折叠。
需要说明的是，在该实施例中，可以选用吹气结构或推料支架配合重力实现第二复合料带303的折叠，也可以是直接依靠重力实现第二复合料带303的折叠。
当采用吹气结构时，在第二复合料带303的两侧均设置吹气结构，且吹气结构均位于叠片台51的上方，两侧的吹气结构在第二复合料带303输送的过 程中交替朝第二复合料带303吹气，由于第一电极料带201上具有折痕，因此吹气结构吹气使得第二复合料带303发生弯折，从而确保第二复合料带303在叠片台51上折叠。
当采用推料支架时，在第二复合料带303的两侧均设置推料支架，且推料支架均位于叠片台51的上方，两侧的推料支架在竖直方向上错位排布，而且两侧的推料支架可相互靠近，以对相邻的两片折叠片施加反方向的外力，使得相邻折叠片弯折，从而确保第二复合料带303在叠片台51上折叠。
当直接依靠重力时，由于第一电极料带201上具有折痕，而第二复合料带303沿竖直方向向下输送至叠片台51上，叠片台51设置有两个挡板，在重力作用下，第一电极料带201受两个挡板的限制在折痕处会发生弯曲并折叠，从而实现第二复合料带303的折叠。
请参阅图6，在实施例2中，第二复合料带303包括多个第一层叠组件3031和第二层叠组件3032，第一层叠组件3031与第二层叠组件3032交替连接，第一层叠组件3031包括依次层叠的第一片料301、第一隔膜202、折叠片及第二隔膜203，第二层叠组件3032包括依次层叠的第一隔膜202、折叠片、第二隔膜203及第二片料302。
在本实施例中，叠片机还包括第二叠片装置60，第二叠片装置60设置于辊压机构422的下游，用于对第二复合料带303沿折痕进行折叠处理，以将多个第一层叠组件3031和多个第二层叠组件3032交替层叠形成电芯。
可以理解的是，本实施例中第二叠片装置60的作用与实施例1中的第一叠片装置50的作用相同。
进一步地，第二叠片装置60包括叠片台61及夹爪62，叠片台61设置于辊压机构422的下游，叠片台61沿竖直方向可往复移动，夹爪62在辊压机构422的出料端以及叠片台61之间往复移动，用于夹持第二复合料带303并将第二复合料带303折叠且放置于叠片台61上。
以一具体实施例进行举例说明：初始时，第二片料装置30先将第二片料302设置于第一复合料带200的首端，然后第一片料装置20将第一片料301放置于第一复合料带200上，接下来依次放置第二片料302和第一片料301，并依次经过入料机构423、加热机构421及辊压机构422的处理从而复合形成 第二复合料带303。
换而言之，本实施例的第二复合料带303中第二层叠组件3032位于首端，第二复合料带303为多个第二层叠组件3032和多个第一层叠组件3031交替连接。
夹爪62将辊压机构422出料端的第二复合料带303抓取并平移到叠片台61上，此时第一复合料带200的第一隔膜202与叠片台61接触，即首端的第二层叠组件3032与叠片台61接触，叠片台61下降，夹爪62回到辊压机构422的出料端继续抓取第二个第二层叠组件3032，接下来夹爪62向叠片台61平移，以将抓取的第二层叠组件3032移动到叠片台61上，由于叠片台61下降，第二复合料带303的首端的第二层叠组件3032也下降了，夹爪62将抓取的第二层叠组件3032移动到叠片台61上时，与首端的第二层叠组件3032相邻的第一层叠组件3031会覆盖在首端的第二层叠组件3032上，而且抓取的第二层叠组件3032也会覆盖在该第一层叠组件3031上，从而实现折叠。
需要解释的是，夹爪62抓取方式为间隔一个层叠组件进行抓取，即每次抓取的层叠组件与上次抓取的层叠组件之间间隔一个层叠组件。如上所述抓取第二层叠组件3032时，由于第一层叠组件3031与第二层叠组件3032是交替连接的，因此夹爪62将第二个第二层叠组件3032抓取到前一个第二层叠组件3032的正上方时，两个第二层叠组件3032之间的第一层叠组件3031会发生折叠。
请参阅图7-图9，在实施例3中，第二复合料带304包括多个第三层叠组件3041及多个第四层叠组件3042，且第三层叠组件3041与第四层叠组件3042交替连接，第三层叠组件3041包括依次层叠的第一片料301、第一隔膜202、折叠片、第二隔膜203及第二片料302，第四层叠组件3042包括依次层叠的第一隔膜202、折叠片及第二隔膜203。
在本实施例中，叠片机还包括第三叠片装置70，第三叠片装置70设置于辊压机构422的下游，用于对第二复合料带304沿折痕进行折叠处理，以将多个第三层叠组件3041和多个第四层叠组件3042交替层叠形成电芯。
进一步地，第三叠片装置70包括叠片台71及夹爪72，叠片台71设置于辊压机构422的下游，且叠片台71沿竖直方向可往复移动，夹爪72在辊压机 构422的出料端以及叠片台71之间往复移动，用于夹持第二复合料带304并将第二复合料带304折叠且放置于叠片台71上。
实际应用中，第三叠片装置70还包括压板73，压板73沿竖直方向可往复移动，用于抵压叠片台71上的电芯，以将层叠设置的第一片料301、第一复合料带200、第二片料302及第一复合料带200压紧，确保电芯中的各层结构紧密贴合。
具体地，第三叠片装置70还包括压刀74，压刀74可随叠片台71沿竖直方向移动，且相对叠片台71可移动，用于抵压电芯。
需要说明的是，夹爪72夹持第二复合料带304并将第二复合料带304折叠且放置于叠片台71上后，压板73压紧电芯，夹爪72撤去，压刀74压住电芯，压板73撤去，避免电芯发生松散或者叠片过程中发生位移，影响叠片的精度。
此外，实施例2中的第二叠片装置60也可以设置压板与压刀，用于压紧电芯。
请参阅图7-图9，以一优选实施例进行举例说明：初始时，第一复合料带200的首端(对应第一个折叠片的位置)放置一片第二片料302，然后再将第一片料301和第二片料302对应第三个折叠片放置于第一复合料带200上，接下来对应第五个折叠片放置第一片料301和第二片料302，并以此类推每间隔一个折叠片重复放置第一片料301和第二片料302，且每次放置的第一片料301和第二片料302与同一折叠片对应，第一复合料带200上放置第一片料301和第二片料302之后依次经过入料机构423、加热机构421及辊压机构422的处理从而复合形成第二复合料带304。换而言之，该实施例中，折叠时首端为仅带有第二片料302的第三层叠组件3041。
在其他实施例中，还可以是折叠时第二复合料带304的第三层叠组件3041位于首端，或者第四层叠组件3042位于首端。三个实施例中的折叠方式相同，在此结合图7-图9，以折叠时首端为仅带有第二片料302的第三层叠组件3041为例进行说明：
抓取前，压板73移动进行避位，夹爪72将辊压机构422出料端的第二复合料带304抓取并平移到叠片台71上，此时第一复合料带200首端的仅带有 第二片料302的第三层叠组件3041与叠片台71接触，压板73下压将其压紧，然后夹爪72撤出并回到辊压机构422的出料端继续抓取第二个第三层叠组件3041，压刀74抵压在第三层叠组件3041上，压刀74压住之后压板73撤去。
接下来夹爪72抓取第二个第三层叠组件3041并平移到叠片台71上，压刀74保持压紧且随叠片台71下降，第二复合料带304的首端的第三层叠组件3041随之下降，夹爪72抓取第二个第三层叠组件3041并平移到叠片台71上时，与首端的第三层叠组件3041相邻的第四层叠组件3042会覆盖在首端的第三层叠组件3041上，而且抓取的第二个第三层叠组件3041也会覆盖在该第四层叠组件3042上，从而实现折叠。
折叠之后压板73再一次压紧，然后将夹爪72撤走继续抓取后面的第三层叠组件3041，接下来将压刀74抽出再一次抵压在另一个第三层叠组件3041上，并随叠片台71下降。
需要解释的是，夹爪72抓取方式为间隔一个层叠组件进行抓取，即每次抓取的层叠组件与上次抓取的层叠组件之间间隔一个层叠组件。如上所述抓取第三层叠组件3041时，由于第三层叠组件3041与第四层叠组件3042是交替连接的，因此夹爪72将第二个第三层叠组件3041抓取到前一个第三层叠组件3041的正上方时，两个第三层叠组件3041之间的第四层叠组件3042会发生折叠。
可以理解的是，本实施例的第三叠片装置70中的夹爪72和叠片台71的动作与实施例2中的第二叠片装置60中的夹爪62和叠片台61的动作相同。
结合上述实施例，需要总结说明的是，上述实施例中的第一片料301、第二片料302及折叠片均为极片，第一隔膜202和第二隔膜203均为隔膜，故折叠后形成的电芯实际上就是极片与隔膜多次层叠形成的结构。
同时，在实施例1和实施例2中，第二复合料带的结构相同，故采用相同的标号，以便于理解，而实施例3中的第二复合料带与实施例1及实施例2中的结构不同，故采用不同的标号，以便于区分。而且两种第二复合料带的制备可通过更改第一片料装置20和第二片料装置30贴片顺序实现，这是本领域技术人员根据实施例3中的说明可以毫无疑义地确定的。
此外，可以理解的是，第一叠片装置50、第二叠片装置60及第三叠片装置70均为用于对第二复合料带进行折叠处理的叠片装置，第一叠片装置50和第二叠片装置60能用于将多个第三层叠组件和多个第四层叠组件交替层叠形成电芯，第三叠片装置70也能用于将多个第一层叠组件和多个第二层叠组件交替层叠形成电芯。
在一具体实施例中，第一电极料带201为负极，第一片料301及第二片料302为正极极片。在另一具体实施例中，第一电极料带201为正极，第一片料301及第二片料302为负极极片。
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本申请范围的限制。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 (10)

  1. 一种叠片机，其中，包括：
    加热装置，用于对第一复合料带进行加热，所述第一复合料带包括层叠设置的第一隔膜、第一电极料带及第二隔膜，所述第一电极料带具有多个沿所述第一电极料带的长度方向间隔排布且沿其宽度方向延伸的折痕；
    第一片料装置，设置于所述加热装置的下游，所述第一片料装置用于向经过加热后的所述第一隔膜背离所述第一电极料带的一侧表面提供第一片料；
    第二片料装置，设置于所述加热装置的下游，所述第二片料装置用于向经过加热后的所述第二隔膜背离所述第一电极料带的一侧表面提供第二片料；及
    第一复合装置，包括加热机构及辊压机构，所述加热机构设置于所述第一片料装置和所述第二片料装置的下游，用于对贴合有所述第一片料和所述第二片料的所述第一复合料带进行加热，所述辊压机构设置于所述加热机构的下游，用于对贴合有所述第一片料和所述第二片料的所述第一复合料带进行辊压处理，从而形成第二复合料带。
  2. 根据权利要求1所述的叠片机，其中，所述叠片机还包括第二复合装置，所述第二复合装置包括：
    第一电极料带放卷机构，用于释放第一电极料带；
    折痕机构，设置于所述第一电极料带放卷机构的下游，用于在途径的所述第一电极料带上形成多个所述折痕；及
    第一复合机构，设置于所述折痕机构与所述加热装置之间，用于在所述第一电极料带的相对两侧复合第一隔膜和第二隔膜并形成所述第一复合料带。
  3. 根据权利要求2所述的叠片机，其中，所述折痕机构包括激光切割头或切刀。
  4. 根据权利要求1所述的叠片机，其中，所述折痕为沿所述第一电极料带的宽度方向依次间隔设置且沿其厚度方向贯穿所述第一电极料带的贯通孔。
  5. 根据权利要求4所述的叠片机，其中，所述贯通孔包括圆形孔、矩形孔或者条形孔中的一种或多种。
  6. 根据权利要求2所述的叠片机，其中，所述折痕为沿所述第一电极料 带的宽度方向纵长延伸的折叠区域，所述第一电极料带的所述折叠区域的厚度小于其他位置的厚度。
  7. 根据权利要求1所述的叠片机，其中，所述第一复合装置还包括入料机构，所述入料机构设置于所述加热机构的上游，用于将所述第一片料和所述第二片料贴合于所述第一复合料带的相对两侧。
  8. 根据权利要求1所述的叠片机，其中，所述第一电极料带上相邻的两个折痕之间形成折叠片；
    所述第二复合料带包括多个第一层叠组件和多个第二层叠组件，且所述第一层叠组件与所述第二层叠组件交替连接，所述第一层叠组件包括依次层叠的所述第一片料、所述第一隔膜、所述折叠片及所述第二隔膜，所述第二层叠组件包括依次层叠的所述第二片料、所述第二隔膜、所述折叠片及所述第一隔膜；
    所述叠片机还包括叠片装置，所述叠片装置设置于所述辊压机构的下游，用于对所述第二复合料带沿所述折痕进行折叠处理，以将多个所述第一层叠组件和多个所述第二层叠组件交替层叠形成电芯。
  9. 根据权利要求1所述的叠片机，其中，所述第一电极料带上相邻的两个折痕之间形成折叠片；
    所述第二复合料带包括多个第三层叠组件及多个第四层叠组件，且所述第三层叠组件与所述第四层叠组件交替连接，所述第三层叠组件包括依次层叠的所述第一片料、所述第一隔膜、所述折叠片、所述第二隔膜及所述第二片料，所述第四层叠组件包括依次层叠的所述第一隔膜、所述折叠片及所述第二隔膜；
    所述叠片机还包括叠片装置，所述叠片装置设置于所述辊压机构的下游，用于对所述第二复合料带沿所述折痕进行折叠处理，以将多个所述第三层叠组件和多个所述第四层叠组件交替层叠形成电芯。
  10. 根据权利要求8或权利要求9所述的叠片机，其中，所述叠片装置包括叠片台及夹爪，所述叠片台设置于所述辊压机构的下游，且所述叠片台沿竖直方向可往复移动，所述夹爪在所述辊压机构的出料端以及所述叠片台之间往复移动，用于夹持所述第二复合料带并将所述第二复合料带折叠且放置于所述叠片台上。
PCT/CN2021/123899 2021-02-09 2021-10-14 叠片机 WO2022170780A1 (zh)

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112820930B (zh) * 2021-02-09 2024-06-04 无锡先导智能装备股份有限公司 叠片机
CN214477590U (zh) * 2021-02-09 2021-10-22 无锡先导智能装备股份有限公司 复合装置及叠片机
CN113809373B (zh) * 2021-08-06 2023-02-10 江苏氢导智能装备有限公司 七合一成型设备
CN115810781A (zh) * 2021-09-13 2023-03-17 宁德时代新能源科技股份有限公司 叠片设备及叠片式电极组件的制造方法
CN113782839B (zh) * 2021-11-11 2022-03-25 深圳市兴禾自动化股份有限公司 一种在线式极片制袋叠合工艺及其制袋叠合生产线
CN114665163A (zh) * 2022-03-11 2022-06-24 上海兰钧新能源科技有限公司 复合叠片设备和复合叠片工艺
FR3122606A1 (fr) * 2022-08-18 2022-11-11 Verkor Système et procédé de fabrication d'une cellule de batterie

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105811017A (zh) * 2016-05-07 2016-07-27 合肥国轩高科动力能源有限公司 一种卷绕式叠片电芯单元的连续复合装置
CN207651617U (zh) * 2017-11-28 2018-07-24 深圳吉阳智能科技有限公司 一种复合式叠片电芯的叠片装置
KR20200126767A (ko) * 2019-04-30 2020-11-09 주식회사 엘지화학 전극 조립체 제조방법과, 이를 통해 제조된 전극 조립체 및 이차전지
CN112310423A (zh) * 2019-12-04 2021-02-02 宁德时代新能源科技股份有限公司 叠片电芯生产系统以及叠片电芯成型方法
CN112820930A (zh) * 2021-02-09 2021-05-18 无锡先导智能装备股份有限公司 叠片机
CN214477588U (zh) * 2021-02-09 2021-10-22 无锡先导智能装备股份有限公司 叠片机

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108011132B (zh) * 2017-11-28 2024-02-06 深圳吉阳智能科技有限公司 一种复合式叠片电芯的叠片方法和装置
KR102692319B1 (ko) * 2018-12-06 2024-08-07 현대자동차주식회사 이차전지의 셀 스태킹 장치 및 이차전지의 제조시스템
KR102580441B1 (ko) * 2019-03-06 2023-09-20 주식회사 엘지에너지솔루션 셀 제조 장치 및 방법
US20220246991A1 (en) * 2019-05-13 2022-08-04 Lg Energy Solution, Ltd. Method for manufacturing electrode assembly, electrode assembly manufactured therethrough, and secondary battery
CN110277590B (zh) * 2019-06-28 2022-04-12 蜂巢能源科技有限公司 用于电芯制造的叠片方法和电芯极组制造装备
CN110943246A (zh) * 2019-10-24 2020-03-31 深圳吉阳智能科技有限公司 一种循环式复合叠片机

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105811017A (zh) * 2016-05-07 2016-07-27 合肥国轩高科动力能源有限公司 一种卷绕式叠片电芯单元的连续复合装置
CN207651617U (zh) * 2017-11-28 2018-07-24 深圳吉阳智能科技有限公司 一种复合式叠片电芯的叠片装置
KR20200126767A (ko) * 2019-04-30 2020-11-09 주식회사 엘지화학 전극 조립체 제조방법과, 이를 통해 제조된 전극 조립체 및 이차전지
CN112310423A (zh) * 2019-12-04 2021-02-02 宁德时代新能源科技股份有限公司 叠片电芯生产系统以及叠片电芯成型方法
CN112820930A (zh) * 2021-02-09 2021-05-18 无锡先导智能装备股份有限公司 叠片机
CN214477588U (zh) * 2021-02-09 2021-10-22 无锡先导智能装备股份有限公司 叠片机

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4084176A4 *

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