WO2022237339A1 - 切片装置及叠片系统 - Google Patents

切片装置及叠片系统 Download PDF

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Publication number
WO2022237339A1
WO2022237339A1 PCT/CN2022/082740 CN2022082740W WO2022237339A1 WO 2022237339 A1 WO2022237339 A1 WO 2022237339A1 CN 2022082740 W CN2022082740 W CN 2022082740W WO 2022237339 A1 WO2022237339 A1 WO 2022237339A1
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WO
WIPO (PCT)
Prior art keywords
pressing
assembly
cutting
composite material
heat
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Application number
PCT/CN2022/082740
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English (en)
French (fr)
Inventor
汪冰
姚军付
Original Assignee
无锡先导智能装备股份有限公司
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Publication of WO2022237339A1 publication Critical patent/WO2022237339A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F3/00—Severing by means other than cutting; Apparatus therefor
    • B26F3/06—Severing by using heat
    • B26F3/08—Severing by using heat with heated members
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present application relates to the technical field of lithium battery equipment, and more specifically, to a slicing device and a stacking system.
  • composite tapes are often used in the lamination process of batteries.
  • the composite tape includes multi-layer diaphragms and multi-layer pole pieces, and each film layer is compounded by thermal compounding.
  • the existing stacking machine can cut the composite material tape into a certain length of composite material sheet while preparing the composite material tape, and use the composite material sheet to stack to obtain the battery cell.
  • the cutting mechanism cuts the composite material strip into composite material sheets
  • the multi-layer diaphragm at the fracture is easy to warp due to being squeezed. Once the separator is lifted, it will affect the stacking accuracy in the subsequent process, and may also be separated from the pole piece, resulting in a short circuit in the battery cell, thereby affecting the quality of the finished battery cell.
  • a slicing device comprising:
  • a compression assembly having a compression surface
  • the cutting assembly includes a base and a cutting knife, the base has an abutment surface, and a channel for the composite strip to pass can be formed between the abutment surface and the pressing surface;
  • thermocompression driving component capable of driving the cutting component and the pressing component to move relative to each other, so as to clamp the composite strip passing through the channel between the pressing surface and the abutting surface, and causing the cutter to cut off the part of the composite strip clamped between the pressing surface and the abutting surface;
  • At least one of the pressing surface and the abutting surface can heat the composite material strip, so as to heat seal the cutting openings on both sides of the cutting part of the composite material strip.
  • the above-mentioned slicing device, the pressing assembly and the cutting assembly can be driven by the heat-pressing driving assembly to approach each other until the composite strip is clamped between the pressing surface and the abutting surface.
  • the cutting knife can cut off the clamped composite material tape, so the cutting part of the composite material tape will also be clamped between the pressing surface and the abutting surface. Since at least one of the pressing surface and the abutting surface can heat the composite material strip, the cutting openings on both sides of the cutting part of the composite material strip can be heat-sealed.
  • the multiple film layers at the cutting opening can achieve secondary compounding, thereby avoiding the multi-layer diaphragm at the edge of the cutting opening and the peeling of the diaphragm and the pole piece, thereby ensuring the accuracy of the stack and avoiding the short circuit of the cell, and finally Improve battery quality.
  • the pressing assembly includes a heat pressing part and a heating part fixedly connected with the heat pressing part and used for heating the heat pressing part, and the pressing surface is formed on the side of the heat pressing part facing the One side of the abutment surface.
  • the pressing surface is formed with an escape groove capable of accommodating the cutting knife, the cutting knife protrudes from the abutting surface, and the abutting surface abuts against the pressing surface When connected, the cutter extends into the avoidance groove.
  • the pressing assembly also has a first guide surface, the first guiding surface is located on both sides of the pressing surface in the first direction and connected with the pressing surface;
  • the base also It has a second guide surface, the second guide surface is located on both sides of the abutment surface in a first direction and is connected with the abutment surface, and the first direction is the extending direction of the composite strip.
  • the base includes a mounting block and two splints fixed on the mounting block, the end faces of the two splints facing the pressing surface form the abutting surface, and the cutter clip It is held between the two splints and protrudes from the abutting surface.
  • the cutting knife is a hot knife; and/or, the clamping plate is a heating plate, so that the abutting surface can heat the composite strip.
  • the installation block is a thermal insulation block.
  • an adjusting component is further included, and the adjusting component can adjust the positions of the cutting component and the pressing component along the extending direction of the composite strip.
  • the adjusting assembly includes an adjusting plate and an adjusting driving member
  • the thermocompression driving assembly is arranged on the adjusting plate
  • the adjusting driving member is transmission-connected with the adjusting plate, and can drive all
  • the regulating plate moves back and forth along the extending direction of the composite strip.
  • a lamination system comprising:
  • the slicing device as described in any one of the above preferred embodiments, and at least two of the slicing devices are arranged at intervals along the extending direction of the composite strip;
  • a conveying device arranged between two adjacent slicing devices can provide driving force to the composite material belt between the two said slicing devices, so as to convey the composite material belt downstream .
  • Fig. 1 is the inspection simplified schematic diagram of lamination system in the preferred embodiment of the present application.
  • Fig. 2 is a schematic diagram of the state when the lamination system shown in Fig. 1 processes the composite strip;
  • Fig. 3 is a schematic diagram of the composite strip after being processed by the lamination system shown in Fig. 1;
  • Fig. 4 is the front view of the slicing device in the preferred embodiment of the present application.
  • Fig. 5 is a top view of the slicing device shown in Fig. 4;
  • Fig. 6 is a lateral schematic diagram of the pressing assembly in the slicing device shown in Fig. 4;
  • Fig. 7 is a lateral schematic diagram of the cutting assembly in the slicing device shown in Fig. 4;
  • Fig. 8 is a simplified schematic diagram of the slicing device shown in Fig. 4 before cutting the composite strip;
  • Fig. 9 is a schematic diagram of a simplified state of the slicing device shown in Fig. 4 when cutting;
  • FIG. 10 is a schematic diagram of the composite strip after being cut by the slicing device shown in FIG. 4 .
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
  • the present application provides a stacking system 10 and a slicing device 100
  • the stacking system 10 includes a slicing device 100 and a conveying device 200 .
  • the slicing device 100 is used to cut the composite tape 20 into laminated units 30
  • the conveying device 200 is used to transport the cut laminated units 30 to the next station for the stacking system 10 to stack the cells. slice operation.
  • the front and rear main drives of the conveying device 200 can realize differential speed control, so as to tension the composite material belt 20 .
  • the lamination system 10 generally also includes lamination tables (not shown), retrieving mechanisms (not shown) and other components used to realize lamination operations. Since this application does not involve improvements to the above-mentioned components, it is This will not be described in detail.
  • the composite tape 20 generally includes a multi-layer diaphragm 21 and a multi-layer pole piece 22, the diaphragm 21 is a continuous strip structure, and the pole piece 22 is a sheet material structure.
  • the multi-layer separators 21 are stacked with each other, and a layer of pole piece 22 is sandwiched between two adjacent layers of separators 21 .
  • Each layer includes a plurality of pole pieces 22 , and the plurality of pole pieces 22 of the same layer are arranged at intervals along the extending direction of the composite strip 20 .
  • the separator 21 is cut along the gap between two adjacent pole pieces 22 .
  • At least two slicing devices 100 In order to improve the production efficiency of the lamination system 10, there are at least two slicing devices 100, and at least two slicing devices 100 are arranged at intervals along the extending direction of the composite belt 20, that is, left and right as shown in FIG. 1 . At least two slicing devices 100 operate simultaneously to obtain at least two lamination units 30 at one time. As shown in FIG. 3 , there are three slicing devices 100 in this embodiment, so three lamination units 30 can be obtained by one-time cutting.
  • the conveying device 200 is arranged between two adjacent slicing devices 100 and can provide driving force to the composite material belt 20 between the two slicing devices 100 so as to convey the composite material belt 20 downstream.
  • the conveying device 200 can adopt a driving roller and a driven roller to cooperate with each other, and the composite material belt 20 can be clamped between the driving roller and the driven roller.
  • the composite belt 20 passes through at least two slicing devices 100 and the conveying device 200 sequentially, and the laminated units 30 cut by the slicing device 100 will be respectively supported by the corresponding conveying devices 200 and conveyed to the next station .
  • the slicing device 100 in the preferred embodiment of the present application includes a pressing component 110 , a cutting component 120 and a heat-press driving component 130 .
  • the pressing assembly 110 and the cutting assembly 120 are arranged relative to each other in a preset direction, ie, the up-and-down direction shown in FIG. 4 , and the thermocompression driving assembly 130 can drive the cutting assembly 120 and the pressing assembly 110 to move relatively.
  • the heat-pressing driving assembly 130 is in transmission connection with at least one of the pressing assembly 110 and the cutting assembly 120, so as to be able to drive the pressing assembly 110 and the cutting assembly 120 to approach and move away from each other.
  • the slicing device 100 further includes a frame 140, and the frame 140 is roughly in an inverted U shape.
  • the pressing assembly 110 , the cutting assembly 120 and the heat pressing driving assembly 130 are all arranged on the frame 140 . Any one of the cutting assembly 120 and the pressing assembly 110 can be fixedly arranged relative to the frame 140, while the other is in transmission connection with the thermocompression drive assembly 130;
  • the components 110 are all connected by transmission, so that the cutting component 120 and the pressing component 110 can be driven by the heat-press driving component 130 to move simultaneously.
  • both the pressing assembly 110 and the cutting assembly 120 in this embodiment can move along a preset direction relative to the frame 140 .
  • the assembly 130 is in transmission connection with the pressing assembly 110 to drive the pressing assembly 110 to reciprocate along a predetermined direction. In this way, the cutting assembly 120 and the pressing assembly 110 are realized to approach and move away from each other.
  • thermocompression drive assembly 130 has two driving ends, such as the jaw cylinder, then only one thermocompression drive assembly 130 can be provided, while the cutting assembly 120 and the pressing assembly 110 are respectively fixed on the two sides of the jaw cylinder. on a jaw.
  • the thermocompressive driving assembly 130 can also be a common air cylinder, an electric cylinder or a motor threaded lead screw pair structure. Taking FIG. 5 as an example, the thermocompressive driving assembly 130 is a common air cylinder, and there are four of them. The four air cylinders are arranged at intervals along the left and right directions, and the middle two air cylinders are connected with the pressing assembly 110 through connecting pieces (not shown), and the outer two air cylinders are connected with the cutting assembly 110 through connecting pieces. In this way, high stability during driving can be ensured.
  • the frame 140 can also be omitted, and the pressing assembly 110 and the cutting assembly 120 can be respectively installed on the driving ends of different thermal pressing driving assemblies 130, and respectively controlled by the thermal pressing assembly 130 where they are located.
  • the drive assembly 130 provides support.
  • the pressing component 110 has a pressing surface 101 , and the pressing surface 101 is located on a side of the pressing component 110 facing the cutting component 120 .
  • the cutting assembly 120 includes a base 121 and a cutting knife 122 .
  • the base 121 can be installed on the frame 140 , and the cutter 122 is arranged on the base 121 .
  • the base 121 has an abutting surface 102 , and the abutting surface 102 is located on a side of the base 121 facing the pressing assembly 110 , so a passage for the composite tape 20 to pass can be formed between the abutting surface 102 and the pressing surface 101 .
  • the cutting assembly 120 and the pressing assembly 110 are separated from each other to open the passage, thereby facilitating the passage of the composite material strip 20;
  • the cutting assembly 120 and the pressing assembly 110 are close to each other, so that the composite material tape 20 is clamped between the pressing surface 101 and the abutting surface 102, and the cutter 122 presses the composite material tape
  • the part 20 clamped between the pressing surface 101 and the abutting surface 102 is cut off.
  • the cutter 122 may be a thermal cutter or a heating sheet, which can heat-melt the diaphragm 21 and cut it off.
  • the cutting knife may also be a cold cutting knife, which cuts off the composite strip 20 through mechanical action.
  • the both sides of the cutting place of composite strip 20 are formed with cutouts, wherein one cutout is positioned at the end (left end shown in Figure 10) of the lamination unit 30 that cuts out, and another cutout Located at the end of the remaining composite strip 20 (right end shown in FIG. 10 ). Since the cut part of the composite strip 20 is clamped between the pressing surface 101 and the abutting surface 102, the cuts on both sides of the cut will also be clamped between the pressing surface 101 and the abutting surface 102. between.
  • At least one of the pressing surface 101 and the abutting surface 102 can heat the composite strip 20 so as to heat seal the cuts on both sides of the cut of the composite strip 20 .
  • the pressing surface 101 and/or the abutting surface 102 generate heat, which can melt the diaphragm 21, and under the pressure of the pressing surface 101 and the abutting surface 102, heat-press edge sealing can be realized on the cut, so that many parts located at the cut
  • the secondary compounding of each film layer can avoid the multi-layer diaphragm 21 at the edge of the cutting edge from lifting and the separation of the diaphragm 21 and the pole piece 22, thereby ensuring the accuracy of the subsequent lamination and avoiding the short circuit of the manufactured battery.
  • both ends of the obtained laminated unit 30 will be automatically heat sealed. , so that under the premise of improving the quality of the battery core, the efficiency will not be reduced due to the additional process.
  • the pressing surface 101 can heat the composite strip 20.
  • the pressing assembly 110 includes a heating element 111 and a heating element 112.
  • the heating element 112 is fixedly connected to the heating element 111. And it is used for heating the heat pressing part 111 , the pressing surface 101 is formed on the side of the heat pressing part 111 facing the abutting surface 102 .
  • the heat-pressing part 111 can be made of metal and other materials with high strength and good thermal conductivity.
  • the heating part 112 can be provided with an electric heating wire or an electric heating tube inside, which can be energized to generate heat.
  • the heat-pressing member 111 directly contacts the surface of the composite tape 20 , and the heating member 112 generates heat to increase the temperature of the pressing surface 101 , thereby heat-sealing the cut.
  • the pressing assembly 110 may also be an integrally formed structure, for example, a metal block with an electric heating wire or an electric heating tube inside.
  • the abutting surface 102 can also heat the composite material tape 20 .
  • the diaphragm 21 at the cutting position can be heated from the upper and lower sides, so the heat sealing effect is better.
  • only any one of the abutting surface 102 and the pressing surface 101 can generate heat, while the other only serves as a support.
  • the base 121 includes a mounting block 1211 and two splints 1212 fixed on the mounting block 1211. It is clamped between two splints 1212 and protrudes from the abutting surface 102 .
  • the cutter 122 is a thermal cutter or a heating sheet
  • at least one of the mounting block 1211 and the clamping plate 1212 is a thermal insulation block.
  • the thermal insulation block can be formed by poor heat conductors such as ceramics. In this way, other components of the slicing device 100 are prevented from being affected by thermal deformation, or the thermal cutting effect of the cutter 122 is not good due to heat conduction of other components.
  • the clamping plate 1212 is a heating plate, so that the abutting surface 102 can heat the composite strip 20 .
  • an electric heating wire or an electric heating tube can be arranged inside the splint 1212, which can increase the temperature of the abutting surface 102, thereby heat-sealing the cutout.
  • the mounting block 1211 is also generally formed of a thermally poor conductor such as ceramics. In this way, the mounting block 1211 can also play a role of heat insulation, thereby preventing other components of the slicing device 100 from being deformed by heat and affecting processing accuracy, or that the clamping plate 1212 has poor heating effect on the abutting surface 102 due to heat conduction of other components.
  • the pressing surface 101 is formed with an escape groove 1011 capable of accommodating the cutting knife 122 .
  • the cutting knife 122 extends into the escape groove 1011.
  • the cutting knife 122 In the process of the cutting assembly 110 and the pressing assembly 120 approaching each other, the cutting knife 122 is in contact with the composite material tape 20 before the abutment surface 102, and the cutting knife 122 can gradually extend into the avoidance groove 1011, and the composite material tape 200 Cutting; during this process, the abutting surface 102 and the pressing surface 101 are gradually approached until the two abut and clamp the composite material strip 20 .
  • the cutter 122 cooperates with the escape groove 1011 to ensure the cutting effect of the composite material strip 20 .
  • the cutting knife 122 can be suspended in the avoidance groove 1011 after cutting the composite material strip 20 without contacting the pressing assembly 110 , so the cutting knife 122 can also be better protected.
  • the cutting knife 122 extends into the avoidance groove 1011, which can also prevent the abutting surface 102 and the pressing surface 101 from being unable to closely fit due to the limit of the cutting knife 122 on the abutting surface 102, and then the composite material belt cannot be 20 compacts effectively.
  • the avoidance slot 1011 may not be provided, but the cutter 122 may be provided in a floating structure.
  • a groove (not shown) may be provided on the base 121, the cutting knife 122 is accommodated in the groove and partially protrudes from the abutting surface 102, and an elastic member (not shown) is arranged between the cutting knife 122 and the bottom of the groove. support.
  • the cutting knife 122 will be in contact with the composite material tape 20 and the pressing surface 101 before the abutment surface 102, and the composite material tape 200 will be cut off; As the assembly 110 and the pressing assembly 120 continue to approach, the cutting knife 122 overcomes the elastic force of the elastic member due to the resisting force of the pressing surface 101 , and retracts into the groove. The abutting surface 102 continues to approach the pressing surface 101 until it abuts against and clamps the composite strip 20 .
  • the splint 1212 and the installation block 1211 are supported by an elastic member (not shown in the figure), and the splint 1212 can expand and contract relative to the installation block 1211 along the aforementioned predetermined direction.
  • the cutter 122 is retracted between the two splints 1212 .
  • the abutment surface 102 will be in contact with the composite material tape 20 and the pressing surface 101 prior to the cutting knife 122 and will compress the composite material tape 200;
  • the splint 1212 will be retracted by the resisting force of the pressing surface 101 until the cutter 122 is exposed to cut off the composite tape 20 .
  • the pressing component 110 also has a first guide surface 103, and the first guide surface 103 is located on both sides of the pressing surface 101 in the first direction and connected to the pressing surface 101.
  • the base 121 also has a second guide surface 104 , the second guide surface 104 is located on both sides of the abutment surface 102 in the first direction and is connected with the abutment surface 102 .
  • the first direction is the extending direction of the composite tape 20 , that is, the left-right direction shown in FIG. 6 and FIG. 7 .
  • both the first guiding surface 103 and the second guiding surface 104 are inclined relative to the above-mentioned first direction, and are inclined surfaces. Moreover, at the upstream end of the channel, the first guide surface 103 and the second guide surface 104 jointly form an inlet with a wide front and a narrow rear; Narrow and wide outlet.
  • the upstream end refers to the end where the composite tape 20 enters the channel, that is, the left end shown in FIG.
  • both the first guide surface 103 and the second guide surface 104 are inclined surfaces, they can also play a transitional role.
  • the first guide surface 103 and the second guide surface 104 can reduce the degree of bending of the diaphragm 21, thereby also preventing the diaphragm 21 from being broken and ensuring The effect of edge banding.
  • the slicing device 100 further includes an adjusting component 150 capable of adjusting the positions of the cutting component 120 and the pressing component 110 along the extending direction of the composite strip 20 .
  • the extending direction of the composite strip 20 refers to the direction perpendicular to the plane of the drawing as shown in FIG. 4 , or the vertical direction as shown in FIG. 5 .
  • the adjustment assembly 150 includes an adjustment plate 151 and an adjustment drive member 152
  • the thermocompression drive assembly 130 is arranged on the adjustment plate 151
  • the adjustment drive member 152 is in transmission connection with the adjustment plate 151, and can drive the adjustment plate 151 moves back and forth along the extending direction of the composite strip 20 .
  • the adjusting plate 151 is reciprocally connected to the frame 140 along the extending direction of the composite material belt 20, and the adjusting drive member 152 can be a telescopic cylinder, an electric cylinder or a motor screw screw pair structure, which can drive the adjusting plate 151 to move back and forth.
  • Both the pressing assembly 110 and the cutting assembly 120 are mounted on the driving end of the heat-pressing driving assembly 130 , so the position can be adjusted along with the movement of the adjusting plate 151 .
  • the adjustment plate 151 is generally disposed above the frame 140 and is slidably connected to the frame 140 through guide rails and sliders.
  • An avoidance hole 141 is opened on the top of the frame 140 , and the heat-pressing drive assembly 130 is disposed on the adjustment plate 151 and can pass through the avoidance hole 141 to be in transmission connection with the cutting assembly 120 and the pressing assembly 110 .
  • each air cylinder passes through the corresponding avoidance hole 141 and is in transmission connection with the pressing assembly 110 or the cutting assembly 120 .
  • the slicing device 100 , the pressing assembly 110 and the cutting assembly 120 can be driven by the heat-pressing driving assembly 130 to approach each other until the composite strip 20 is clamped between the pressing surface 101 and the abutting surface 102 .
  • the cutter 122 can cut off the clamped composite material tape 20 , so the cutting part of the composite material tape 20 will also be clamped between the pressing surface 101 and the abutting surface 102 . Since at least one of the pressing surface 101 and the abutting surface 102 can heat the composite strip 20 , heat sealing can be performed on both sides of the cut of the composite strip 20 .

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Abstract

提供一种切片装置（100），包括压合组件（110）、裁切组件（120）及热压驱动组件（130）；压合组件（110）及裁切组件（120）能够在热压驱动组件（130）的驱使下相互靠近，直至将复合料带（20）夹持于压合面（101）与抵持面（102）之间；而且，切刀（122）能够将被夹持的复合料带（20）切断，故复合料带（20）的切断处也将被夹持于压合面（101）与抵持面（102）之间；由于压合面（101）及抵持面（102）中的至少一个能够对复合料带（20）加热，故可对复合料带（20）的切断处两侧的切断口进行热封；如此，切断口处的多个膜层便可实现二次复合，从而可以避免切断口边缘的多层隔膜（21）翘起以及隔膜（21）与极片（22）发生剥离，进而确保堆叠的精度并避免电芯短路，并最终改善电芯的质量；此外，还提供一种叠片系统（10）。

Description

切片装置及叠片系统 技术领域
本申请涉及锂电池设备技术领域，更具体地说，涉及一种切片装置及叠片系统。
背景技术
为了提升生产效率，电芯的叠片过程中经常会采用复合料带。复合料带包括多层隔膜以及多层极片，且各膜层之间通过热复合的方式进行复合。现有的叠片机能够在制备复合料带的同时，将复合料带裁切成一定长度的复合料片，并利用复合料片进行堆叠以得到电芯。
但是，当裁断机构将复合料带裁切成复合料片时，由于受到挤压，故导致断口处的多层隔膜容易翘起。一旦隔膜发生翘起，将会在后续工序中影响堆叠的精度，也可能与极片剥离而导致电芯发生短路，从而影响电芯成品的质量。
发明内容
基于此，本申请有必要针对上述问题，提供一种能够改善电芯质量的切片装置及叠片系统。
一种切片装置，包括：
压合组件，具有压合面；
裁切组件，包括底座及切刀，所述底座具有抵持面，所述抵持面与所述压合面之间能够形成供复合料带通过的通道；及
热压驱动组件，能够驱动所述裁切组件及所述压合组件相对移动，以将经过所述通道的所述复合料带夹持于所述压合面与所述抵持面之间，并使所述切刀将所述复合料带夹持于所述压合面与所述抵持面之间的部分切断；
其中，所述压合面及所述抵持面中的至少一个能够对所述复合料带加热，以对所述复合料带的切断处两侧的切断口进行热封。
上述切片装置，压合组件及裁切组件能够在热压驱动组件的驱使下相互靠近，直至将复合料带夹持于压合面与抵持面之间。而且，切刀能够将被夹持的复合料带切断，故复合料带的切断处也将被夹持于压合面与抵持面之间。由于压合面及抵持面中的至少一个能够对复合料带加热，故可对复合料带的切断处两侧的切断口进行热封。如此，切断口处的多个膜层便可实现二次复合，从而可以避免切断口边缘的多层隔膜翘起以及隔膜与极片发生剥离，进而确保堆叠的精度并避免电芯短路，并最终改善电芯的质量。
在其中一个实施例中，所述压合组件包括热压件及与所述热压件固定连接并用于对热压件加热的加热件，所述压合面形成于所述热压件朝向所述抵持面的一侧。
在其中一个实施例中，所述压合面形成有能够容纳所述切刀的避位槽，所述切刀突出于所述抵持面，且所述抵持面与所述压合面相抵接时，所述切刀伸入所述避位槽内。
在其中一个实施例中，所述压合组件还具有第一导向面，所述第一导向面位于所述压合面第一方向的两侧并与所述压合面连接；所述底座还具有第二导向面，所述第二导向面位于所述抵持面第一方向的两侧并与所述抵持面连接，所述第一方向为所述复合料带的延伸方向。
在其中一个实施例中，所述底座包括安装块及固定于所述安装块的两个夹板，两个所述夹板朝向所述压合面的端面构成所述抵持面，所述切刀夹持于两个所述夹板之间并突出于所述抵持面。
在其中一个实施例中，所述切刀为热切刀；和\或，所述夹板为加热板，以 使所述抵持面能够对所述复合料带加热。
在其中一个实施例中，所述安装块为隔热块。
在其中一个实施例中，还包括调节组件，所述调节组件能够沿所述复合料带的延伸方向调节所述裁切组件及所述压合组件的位置。
在其中一个实施例中，所述调节组件包括调节板及调节驱动件，所述热压驱动组件设置于所述调节板上，所述调节驱动件与所述调节板传动连接，并能够驱动所述调节板沿所述复合料带的延伸方向往复移动。
一种叠片系统，包括：
如上述优选实施例中任一项所述的切片装置，且至少两个所述切片装置沿所述复合料带的延伸方向间隔设置；
设于相邻两个所述切片装置之间的输送装置，所述输送装置能够对两个所述切片装置之间的所述复合料带提供驱动力，以将所述复合料带向下游输送。
上述叠片系统，至少两个切片装置同时动作，便可一次性裁切得到至少两个叠片单元。因此，上述叠片系统的生产效率较高。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请较佳实施例中叠片系统的检简化示意图；
图2为图1所示叠片系统处理复合料带时的状态示意图；
图3为复合料带经图1所示叠片系统处理后的示意图；
图4为本申请较佳实施例中切片装置的主视图；
图5为图4所示切片装置的俯视图；
图6为图4所示切片装置中压合组件的侧向示意图；
图7为图4所示切片装置中裁切组件的侧向示意图；
图8为图4所示切片装置对复合料带裁切前的简化状态示意图；
图9为图4所示切片装置对裁切时的简化状态示意图；
图10为复合料带经图4所示切片装置裁切完成后的示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
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。
请参阅图1及图2，本申请提供了一种叠片系统10及切片装置100，叠片系统10包括切片装置100及输送装置200。
切片装置100用于将复合料带20裁切成叠片单元30，输送装置200用于将裁切得到的叠片单元30输送至下一个工位，以供叠片系统10进行电芯的叠片操作。而且，输送装置200的前后主驱能够实现差速控制，从而张紧复合料带20。显然，叠片系统10一般还包括叠片台(图未示)、取料机构(图未示)等其他用于实现叠片操作的元件，由于本申请不涉及对上述元件的改进，故在此不做详细描述。
如图所示，复合料带20通常包括多层隔膜21及多层极片22，隔膜21为连续的料带结构，而极片22则为片料结构。多层隔膜21相互层叠，且相邻两层隔膜21之间夹有一层极片22。每一层的包括多个极片22，且同一层的多个极片22沿复合料带20的延伸方向间隔排布。切片装置100对复合料带20进行裁切时，沿相邻两个极片22之间的间隙将隔膜21切断。
为了提升叠片系统10的生产效率，切片装置100至少为两个，且至少两个切片装置100沿复合料带20的延伸方向，即图1所示的左右放间隔设置。至少两个切片装置100同时动作，便可一次性裁切得到至少两个叠片单元30。如图3所示，本实施例中的切片装置100设置为三个，则一次性裁切可得到三个叠片单元30。
输送装置200设于相邻两个切片装置100之间，能够对两个切片装置100之间的复合料带20提供驱动力，以将复合料带20向下游输送。输送装置200可采用驱动辊与从动辊相配合的方式，复合料带20能够夹持于驱动辊与从动辊之间。切片前，复合料带20依次穿过至少两个切片装置100及输送装置200，而切片装置100裁切得到的叠片单元30将分别由对应的输送装置200支撑，并向下一个工位输送。
请一并参阅图4及图5，本申请较佳实施例中的切片装置100包括压合组件110、裁切组件120及热压驱动组件130。
压合组件110及裁切组件120在预设方向，即图4所示的上下方向上相对设置，且热压驱动组件130能够驱动裁切组件120及压合组件110相对移动。热压驱动组件130与压合组件110及裁切组件120中的至少一个传动连接，从而能够驱动压合组件110及裁切组件120相互靠近和远离。
在本实施例中，切片装置100还包括机架140，机架140大致呈倒U形。压合组件110、裁切组件120及热压驱动组件130均设于机架140上。裁切组件120及压合组件110中的任一个可以相对机架140固定设置，而另一个与热压驱动组件130传动连接；也可以是热压驱动组件130同时与裁切组件120及压合组件110均传动连接，从而可由热压驱动组件130带动裁切组件120及压合组件110同时移动。
更具体的，本实施例中的压合组件110及裁切组件120均能够相对于机架140沿预设方向移动。对应的，热压驱动组件130一般也至少设置为两个，且至少一个热压驱动组件130与裁切组件120传动连接，以驱动裁切组件110沿预设方向往复移动，至少一个热压驱动组件130与压合组件110传动连接，以驱动压合组件110沿预设方向往复移动。如此，实现裁切组件120与压合组件110相互靠近和远离。
当然，若热压驱动组件130具有两个驱动端，如夹爪气缸，则热压驱动组件130也可仅设置一个，而裁切组件120及压合组件110则分别固定于夹爪气缸的两个夹爪上。
热压驱动组件130还可以是普通气缸、电缸或电机螺纹丝杠副结构。以图5所示为例，热压驱动组件130为普通气缸，且设置有四个。四个气缸沿左右方向间隔排布，且中间两个气缸与压合组件110通过连接件(图未示)连接，外侧两个气缸则通过连接件与裁切组件110连接。如此，能够确保在驱动过程中 具有较高的稳定性。
需要指出的是，在其他实施例中，机架140也可以省略，压合组件110及裁切组件120能够分别安装于不同的热压驱动组件130的驱动端上，并分别由所在的热压驱动组件130进行支撑。
请一并参阅图6及图7，压合组件110具有压合面101，压合面101位于压合组件110朝向裁切组件120的一侧。裁切组件120包括底座121及切刀122。具体的，底座121可以安装于机架140，切刀122则设于底座121。底座121具有抵持面102，且抵持面102位于底座121朝向压合组件110的一侧，故抵持面102与压合面101之间能够形成供复合料带20通过的通道。
如图8及图9所示，在对复合料带20进行裁切前，裁切组件120与及压合组件110相互远离以将通道打开，从而方便复合料带20穿过；而在对复合料带20进行裁切时，裁切组件120及压合组件110相互靠近，以将复合料带20夹持于压合面101与抵持面102之间，并使切刀122将复合料带20夹持于压合面101与抵持面102之间的部分切断。切刀122可以是热切刀或加热片，可将隔膜21热熔而裁断。当然，切刀也可以是冷切刀，通过机械作用将复合料带20切断。
如图10所示，复合料带20的切断处的两侧形成有切断口，其中一个切断口位于裁切得到的叠片单元30的端部(图10所示的左端)，另一个切断口位于剩余复合料带20的端部(图10所示的右端)。由于复合料带20被切断的部分被夹持于压合面101与抵持面102之间，故切断处的两侧的切断口也将被夹持于压合面101与抵持面102之间。
进一步的，压合面101及抵持面102中的至少一个能够对复合料带20加热，以对复合料带20的切断处两侧的切断口进行热封。压合面101和/或抵持面102发热，能够将隔膜21熔化，并在压合面101及抵持面102的压紧下对切断口实 现热压封边，使得位于切断口处的多个膜层二次复合，从而可以避免切断口边缘的多层隔膜21翘起以及隔膜21与极片22发生剥离，进而能够确保后续叠片的精度并避免制得的电芯发生短路。
而且，对切断口的热封以及对复合料带20的裁切几乎是同时进行的，在切片装置100连续裁切的过程中，所得到的叠片单元30的两端均会被自动热封，从而在提升电芯质量的前提下，并不会因额外增加工序而导致效率降低。
具体在本实施例中，压合面101能够对复合料带20加热，请再次参阅图6，压合组件110包括热压件111及加热件112，加热件112与热压件111固定连接,并用于对热压件111加热，压合面101形成于热压件111朝向抵持面102的一侧。
热压件111可采用金属等具有较高强度且导热性能较好的材料成型，加热件112的内部可以设置有电热丝或电热管，能够通电发热。在复合料带20被压紧时，热压件111直接与复合料带20的表面接触，而加热件112发热能够使压合面101的温度升高，从而对切断口实现热封。
显然，在其他实施例中，压合组件110也可以是一体成型的结构，譬如，内部设置有电热丝或电热管的金属块。
进一步的，在本实施例中，抵持面102也能够对复合料带20加热。如此，压合面101及抵持面102同时发热时，能够从上下两侧对切断处的隔膜21进行加热，故热封效果更好。显然，在其他实施例中，也可仅抵持面102及压合面101中的任一个能够发热，而另一个则仅起到支撑的作用。
请再次参阅图7，在本实施例中，底座121包括安装块1211及固定于安装块1211的两个夹板1212，两个夹板1212朝向压合面101的端面构成抵持面102，切刀122夹持于两个夹板1212之间并突出于抵持面102。
当切刀122是热切刀或加热片时，安装块1211及夹板1212的其中至少一 个为隔热块。具体的，隔热块可以由陶瓷等热的不良导体成型。如此，防止切片装置100的其它部件因受热变形而影响加工精度，或者因其它部件导热而导致切刀122的热切效果不佳。
进一步的，在本实施例中，夹板1212为加热板，以使抵持面102能够对复合料带20加热。同样的，夹板1212内部可设置电热丝或电热管，能够使得抵持面102的温度升高，从而对切断口进行热封。此时，安装块1211也一般由陶瓷等热的不良导体成型。如此，安装块1211还能够起到隔热的作用，从而防止切片装置100的其它部件因受热变形而影响加工精度，或者因其它部件导热而导致夹板1212对抵持面102的加热效果不佳。
请一并参阅图9，在本实施例中，压合面101形成有能够容纳切刀122的避位槽1011，切刀122突出于抵持面102，抵持面102与压合面101相抵接时，切刀122伸入避位槽1011内。
在裁切组件110与压合组件120相互靠近的过程中，切刀122先于抵持面102与复合料带20接触，切刀122可以逐渐伸入避位槽1011，并将复合料带200切断；这一过程中，抵持面102与压合面101则逐渐接近，直至两者相抵接并将复合料带20夹紧。切刀122与避位槽1011配合，保证了对复合料带20的切割效果。而且，切刀122将复合料带20切断后能够悬于避位槽1011内而不与压合组件110抵接，故还能够对切刀122起到较好的保护作用。
进一步的，切刀122伸入避位槽1011，还能够避免因切刀122对抵持面102形成限位而导致抵持面102与压合面101无法紧密贴合，进而无法将复合料带20有效地压紧。
需要指出的是，在其他实施例中，为了达到上述效果，也可不设置避位槽1011，而将切刀122设置为浮动结构。譬如，底座121上可设置有凹槽(图未 示)，切刀122收容于凹槽且部分突出于抵持面102，切刀122与凹槽的底部之间由弹性件(图未示)支撑。在裁切组件110与压合组件120相互靠近的过程中，切刀122将先于抵持面102与复合料带20及压合面101接触，并将复合料带200切断；随着裁切组件110与压合组件120继续靠近，切刀122因受到压合面101的抵持力而克服弹性件的弹力，并向凹槽内回缩。抵持面102则继续向压合面101靠近，直至相抵接并夹紧复合料带20。
又或者，夹板1212与安装块1211之间由弹性件(图未示)支撑，夹板1212能够相对于安装块1211沿上述预设方向伸缩。自然状态下，切刀122内缩在两个夹板1212之间。在裁切组件110与压合组件120相互靠近的过程中，抵持面102将先于切刀122与复合料带20及压合面101接触并将复合料带200压紧；随着裁切组件110与压合组件120继续靠近，夹板1212将受到压合面101的抵持力而回退，直至将切刀122露出便可将复合料带20切断。
请再次参阅图6及与7，在本实施例中，压合组件110还具有第一导向面103，第一导向面103位于压合面101第一方向的两侧并与压合面101连接；底座121还具有第二导向面104，第二导向面104位于抵持面102第一方向的两侧并与抵持面102连接。其中，第一方向为复合料带20的延伸方向，也即图6、图7所示的左右方向。
具体的，第一导向面103及第二导向面104均相较于上述第一方向倾斜，为斜面。而且，在通道的上游端，第一导向面103与第二导向面104共同构成前宽后窄的导入口；而在通道的下游端，第一导向面103与第二导向面104共同构成前窄后宽的导出口。上游端指的是复合料带20进入通道的一端，即图6所示的左侧一端；下游端指的是复合料带20导出通道的一端，即图6所示的右侧一端。
由于导入口前宽后窄，故能够方便复合料带20顺利进入通道，而导出口前窄后宽，则方便裁切后的复合料带20或叠片单元30从通道顺利导出，从而保证裁切过程能够连续进行。而且，由于第一导向面103及第二导向面104均为斜面，还能够起到过渡作用。当在压合面101及抵持面102将复合料带20压紧时，第一导向面103及第二导向面104能够减轻隔膜21的弯折程度，从而还能够避免隔膜21破环并保证封边的效果。
请再次参阅图4及图5，在本实施例中，切片装置100还包括调节组件150，调节组件150能够沿复合料带20的延伸方向调节裁切组件120及压合组件110的位置。
复合料带20的延伸方向指的是图4所示垂直于图纸平面的方向，或图5所示的上下方向。通过调节组件150调节裁切组件120及压合组件110的位置，能够改变复合料带20被裁切时所形成的切断处的位置，从而可根据实际需要调整裁切得到的叠片单元的30尺寸。
进一步的，在本实施例中，调节组件150包括调节板151及调节驱动件152，热压驱动组件130设置于调节板151上，调节驱动件152与调节板151传动连接，并能够驱动调节板151沿复合料带20的延伸方向往复移动。
具体的，调节板151沿复合料带20的延伸方向可往复移动地连接于机架140，调节驱动件152可以是伸缩气缸、电缸或电机螺纹丝杠副结构，能够驱动调节板151往复移动。压合组件110及裁切组件120均安装于热压驱动组件130的驱动端，故能够随着调节板151的移动而实现位置调节。
调节板151一般设置于机架140的上方，并通过导轨与滑块与机架140滑动连接。机架140的顶部开设有避位孔141，热压驱动组件130设置于调节板151上，且能够穿过避位孔141与裁切组件120及压合组件110传动连接。
更具体的，本实施例中的避位孔141为四个，分别对应作为热压驱动组件130的四个气缸。每一个气缸均穿过对应的避位孔141，并与压合组件110或裁切组件120传动连接。
上述切片装置100，压合组件110及裁切组件120能够在热压驱动组件130的驱使下相互靠近，直至将复合料带20夹持于压合面101与抵持面102之间。而且，切刀122能够将被夹持的复合料带20切断，故复合料带20的切断处也将被夹持于压合面101与抵持面102之间。由于压合面101及抵持面102中的至少一个能够对所述复合料带20加热，故可对复合料带20的切断处两侧的切断口进行热封。如此，切断口处的多个膜层便可实现二次复合，从而可以避免切断口边缘的多层隔膜21翘起以及隔膜21与极片22发生剥离，进而确保堆叠的精度并避免电芯短路，并最终改善电芯的质量。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本申请。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本申请的精神或范围的情况下，在其它实施例中实现。因此，本申请将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (10)

  1. 一种切片装置，其特征在于，包括：
    压合组件，具有压合面；
    裁切组件，包括底座及切刀，所述底座具有抵持面，所述抵持面与所述压合面之间能够形成供复合料带通过的通道；及
    热压驱动组件，能够驱动所述裁切组件及所述压合组件相对移动，以将经过所述通道的所述复合料带夹持于所述压合面与所述抵持面之间，并使所述切刀将所述复合料带夹持于所述压合面与所述抵持面之间的部分切断；
    其中，所述压合面及所述抵持面中的至少一个能够对所述复合料带加热，以对所述复合料带的切断处两侧的切断口进行热封。
  2. 根据权利要求1所述的切片装置，其特征在于，所述压合组件包括热压件及与所述热压件固定连接并用于对热压件加热的加热件，所述压合面形成于所述热压件朝向所述抵持面的一侧。
  3. 根据权利要求1所述的切片装置，其特征在于，所述压合面形成有能够容纳所述切刀的避位槽，所述切刀突出于所述抵持面，且所述抵持面与所述压合面相抵接时，所述切刀伸入所述避位槽内。
  4. 根据权利要求1所述的切片装置，其特征在于，所述压合组件还具有第一导向面，所述第一导向面位于所述压合面第一方向的两侧并与所述压合面连接；所述底座还具有第二导向面，所述第二导向面位于所述抵持面第一方向的两侧并与所述抵持面连接，所述第一方向为所述复合料带的延伸方向。
  5. 根据权利要求1所述的切片装置，其特征在于，所述底座包括安装块及固定于所述安装块的两个夹板，两个所述夹板朝向所述压合面的端面构成所述抵持面，所述切刀夹持于两个所述夹板之间并突出于所述抵持面。
  6. 根据权利要求5所述的切片装置，其特征在于，所述切刀为热切刀；和 \或，所述夹板为加热板，以使所述抵持面能够对所述复合料带加热。
  7. 根据权利要求6所述的切片装置，其特征在于，所述安装块为隔热块。
  8. 根据权利要求1所述的切片装置，其特征在于，还包括调节组件，所述调节组件能够沿所述复合料带的延伸方向调节所述裁切组件及所述压合组件的位置。
  9. 根据权利要求8所述的切片装置，其特征在于，所述调节组件包括调节板及调节驱动件，所述热压驱动组件设置于所述调节板上，所述调节驱动件与所述调节板传动连接，并能够驱动所述调节板沿所述复合料带的延伸方向往复移动。
  10. 一种叠片系统，其特征在于，包括：
    如上述权利要求1至9任一项所述的切片装置，且至少两个所述切片装置沿所述复合料带的延伸方向间隔设置；
    设于相邻两个所述切片装置之间的输送装置，所述输送装置能够对两个所述切片装置之间的所述复合料带提供驱动力，以将所述复合料带向下游输送。
PCT/CN2022/082740 2021-05-11 2022-03-24 切片装置及叠片系统 WO2022237339A1 (zh)

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