WO2020078201A1 - 电池极片热复合设备及其用于热压合电池极片组件的方法 - Google Patents

电池极片热复合设备及其用于热压合电池极片组件的方法 Download PDF

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Publication number
WO2020078201A1
WO2020078201A1 PCT/CN2019/108678 CN2019108678W WO2020078201A1 WO 2020078201 A1 WO2020078201 A1 WO 2020078201A1 CN 2019108678 W CN2019108678 W CN 2019108678W WO 2020078201 A1 WO2020078201 A1 WO 2020078201A1
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WO
WIPO (PCT)
Prior art keywords
roller
pole piece
battery pole
rolling roller
heating
Prior art date
Application number
PCT/CN2019/108678
Other languages
English (en)
French (fr)
Inventor
阳如坤
陈飞
杨吉
魏宏生
Original Assignee
深圳吉阳智能科技有限公司
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Application filed by 深圳吉阳智能科技有限公司 filed Critical 深圳吉阳智能科技有限公司
Priority to EP19856441.1A priority Critical patent/EP3686969B1/en
Publication of WO2020078201A1 publication Critical patent/WO2020078201A1/zh

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    • 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
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B32B37/0053—Constructional details of laminating machines comprising rollers; Constructional features of the rollers
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/52—Heating or cooling
    • 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
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B41/00—Arrangements for controlling or monitoring lamination processes; Safety arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/04—Construction or manufacture in general
    • H01M10/0404—Machines for assembling batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M4/043—Processes of manufacture in general involving compressing or compaction
    • H01M4/0435—Rolling or calendering
    • 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
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B32B37/1054—Regulating the dimensions of the laminate, e.g. by adjusting the nip or platen gap
    • 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

Definitions

  • the present disclosure relates to the technical field of lithium ion battery manufacturing, and in particular, to a battery pole piece thermal composite device and a method for thermally pressing the battery pole piece assembly.
  • the manufacture of lithium-ion batteries usually adopts the lamination process, specifically using the method of thermal composite lamination. Specifically, before lamination, the positive electrode material belt, the negative electrode material belt and the separator film belt need to be baked and heated by the heating device. Use appropriate pressure to roll the above three to make them fit together to form a whole.
  • the inventor found through research that the cell structure obtained by the above method is tight, and the gap between the diaphragm and the pole piece is almost zero, resulting in a longer electrolyte penetration time in the subsequent liquid injection process, which is difficult to meet the power of the new energy market.
  • the present disclosure provides a battery pole piece thermal composite device and a method for thermally pressing the battery pole piece assembly to effectively alleviate the above technical problems.
  • the battery pole piece thermal recombination device provided by the embodiment of the present disclosure is used for thermally pressing and bonding the battery pole piece assembly.
  • the battery pole piece thermal recombination device includes a base, a heating device, and an electrode rolling disposed on the base Device, the heating device is provided in the electrode rolling device;
  • the electrode rolling device includes a first rolling roller, a second rolling roller, and a driving device, the first rolling roller and the second rolling roller are both connected to the driving device, and the first rolling roller It is arranged side by side with the second rolling roller, and there is a gap between the first rolling roller and the second rolling roller for the battery pole piece assembly to pass through.
  • the outer surface of the first rolling roller and / or the second rolling roller A plurality of grooves are provided on the surface, the heating device is used to heat the battery pole piece assembly, and the heated battery pole piece assembly is transferred to the first rolling roller and the second rolling roller The gap therebetween is thermally pressed through the first roller and the second roller.
  • the shape and size of the first rolling roller are the same as the shape and size of the second rolling roller, and the first rolling roller is provided with Multiple grooves with the same shape and size and spaced in sequence.
  • the second rolling roller is provided with a plurality of grooves of the same shape and size and spaced in sequence.
  • the groove is an annular groove.
  • the driving device includes a servo motor, a first driving component, and a second driving component
  • the first driving component is connected to the first rolling roller
  • a second drive assembly is connected to the second roller
  • the servo motor is connected to both the first drive assembly and the second drive assembly to simultaneously drive the first drive assembly and the second drive
  • the assembly drives the first roller and the second roller to rotate at the same time, and the rotation speeds of the first roller and the second roller are opposite in the same direction.
  • the heating device is disposed at a level substantially the same as the gap between the first roller and the second roller.
  • the heating device includes a first heating member and a second heating member that are opposed to each other, and the first heating member is disposed on the first rolling roller.
  • the second heating element is disposed on the second roller, so that the gap between the first heating element and the second heating element is substantially the same as the gap between the first roller and the second roller At the same level, and the distance between the first heating element and the second heating element matches the thickness of the battery pole piece assembly, so that the first heating element and the second heating element can be viewed from both sides
  • the battery pole piece assembly is heated.
  • the first heating element and the second heating element have the same shape and size, and each of the first heating element and the second heating element Both include a heating plate, a heat insulation plate, and a heating wire, the heating wire is embedded in the heating plate, the heat insulation plate is provided on a side of the heating plate away from the heating wire, and the heating plate The heat insulation plate is disposed on the first rolling roller, and the side of the heating plate away from the heat insulation plate, that is, the side provided with the heating wire faces the battery pole piece assembly to be heated, In order to heat the battery pole piece assembly.
  • the first heating element and / or the second heating element have a round or square heating surface.
  • the first heating element and / or the second heating element have a heating wire, and the heating wire is embedded in the heating plate in a serpentine shape .
  • the first heating element and / or the second heating element have a plurality of heating wires, and the heating wires are embedded in the heating plate in parallel side by side.
  • the battery pole piece thermal composite equipment further includes a support base and a depressing cylinder, the support base is disposed on the base, and the depressing cylinder is disposed on the The supporting base is connected with the first roller to provide a pressing force to the first roller.
  • the battery pole piece thermal composite equipment further includes an auxiliary cylinder, a slide plate, and a connecting plate
  • the auxiliary cylinder is disposed on the support base
  • the connecting plate is arranged on the connecting plate, and the connecting plate is connected with the supporting base through the sliding plate, so that the auxiliary cylinder drives the first rolling roller arranged on the connecting plate to slide up and down along the sliding plate, Adjust the distance between the first roller and the second roller.
  • the battery pole piece thermal composite equipment further includes a transition rotating roller, the transition rotating roller is disposed on the base and located on the electrode rolling device away from the One side of the heating device is used to transport the pressed battery pole piece assembly.
  • the present disclosure also provides a battery pole piece thermal composite device for thermally pressing a battery pole piece assembly.
  • the battery pole piece thermal composite device includes: the battery pole piece thermal composite device includes a base and a heating device , A transitional rotating roller and an electrode rolling device provided on the base, the heating device is provided on the electrode rolling device;
  • the electrode rolling device includes a first rolling roller, a second rolling roller, and a driving device, the first rolling roller and the second rolling roller are both connected to the driving device, and the first rolling roller It is arranged side by side with the second roller, and there is a gap between the first roller and the second roller for the battery pole piece assembly to pass through, the shape and size of the first roller and the second roller
  • the bottom is the same and the outer surface is sequentially provided with a plurality of grooves at intervals.
  • the heating device is used to heat the battery pole piece assembly, and the heated battery pole piece assembly is transferred to the first rolling
  • the gap between the roller and the second roller is to be thermally pressed by the first roller and the second roller, and the transitional rotating roller is provided on the base and located in the electrode roller
  • the side far away from the heating device is used for conveying the pressed battery pole piece assembly.
  • the present disclosure also provides a method for thermally pressing a battery pole piece assembly using the above-mentioned battery pole piece thermal composite equipment.
  • the method includes: heating the battery pole piece assembly by the heating device, and heating the battery pole piece assembly The battery pole piece assembly is transferred to the gap between the first roller and the second roller to be thermally pressed by the first roller and the second roller.
  • the shape and size of the first rolling roller are the same as the shape and size of the second rolling roller, and the first rolling The pressing roller is provided with a plurality of grooves with the same shape and size as each other and spaced in sequence.
  • the second rolling roller is provided with a plurality of grooves with the same shape and size and spaced in sequence.
  • the groove is an annular groove.
  • the heating device in a method of thermally pressing and bonding a battery pole piece assembly, includes a first heating element and a second heating element opposed to each other, and the first heating element is disposed on the first mill A pressure roller, the second heating element is disposed on the second roller, so that the gap between the first heating element and the second heating element is between the first roller and the second roller The gap between them is substantially the same level, and the distance between the first heating element and the second heating element matches the thickness of the battery pole piece assembly, so that the first heating element and the second heating element
  • the two heating elements can respectively heat the battery pole piece assembly from both sides.
  • the battery pole piece thermal composite equipment provided by the embodiments of the present disclosure is provided with a base, a heating device and an electrode rolling device, and the electrode rolling device is provided with a first rolling roller, a second rolling roller and a driving device, and A plurality of grooves are provided on the outer surface of the first rolling roller and / or the second rolling roller, so that the compressed battery pole obtained by thermally pressing the battery pole piece assembly by the above battery pole piece thermal recombination device
  • the sheet assembly has an uncompacted transition zone, so as to realize rapid liquid injection and improve the practicality of the battery pole piece thermal composite equipment.
  • FIG. 1 is a schematic structural diagram of a battery pole piece thermal composite device provided by an embodiment of the present disclosure.
  • FIG. 2 is another schematic structural diagram of a battery pole piece thermal composite device provided by an embodiment of the present disclosure.
  • FIG 3 is a schematic structural diagram of a first rolling roller provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a first heating element provided by an embodiment of the present disclosure.
  • Icon 100-battery pole piece thermal composite equipment; 110-base; 120-heating device; 122-first heating element; 122a-heating plate; 122b-insulation plate; 122c-heating wire; 124-second heating element ; 130- electrode rolling device; 132-first rolling roller; 133-groove; 134-second rolling roller; 140-support seat; 150-down pressure cylinder; 160-auxiliary cylinder; 170-slide; 180 -Connecting plate; 190- transitional rotating roller.
  • an embodiment of the present disclosure provides a battery pole piece thermal composite device 100 for thermally pressing a battery pole piece assembly.
  • the battery pole piece thermal composite device 100 includes a base 110, The heating device 120 and the electrode rolling device 130 disposed on the base 110 are disposed on the electrode rolling device 130.
  • the electrode rolling device 130 may include a first rolling roller 132, a second rolling roller 134, and a driving device, the first rolling roller 132 and the second rolling The rollers 134 are respectively connected to the driving device, the first rolling roller 132 and the second rolling roller 134 are arranged side by side, and a battery pole piece assembly is provided between the first rolling roller 132 and the second rolling roller 134 Through the gap.
  • the heating device 120 is disposed at a level substantially the same as the gap between the first roller 132 and the second roller 134. Referring to FIG.
  • the battery electrode sheet assembly may include a positive electrode sheet, a first separator, a negative electrode sheet, and a second separator that are sequentially stacked, or may include only the first separator and the negative electrode that are sequentially stacked. And a second separator.
  • the battery pole piece assembly may further include a plurality of electrode pieces, wherein each electrode piece has a separator on both sides.
  • the shape of the base 110 may be arbitrary. For example, it may be a regular shape such as a rectangular parallelepiped shape, a truncated cone shape, a column shape, or any irregular shape, which is not specifically limited herein.
  • the temperature at which the heating device 120 heats the battery pole piece assembly may include but is not limited to 80 ° C, 90 ° C, 110 ° C, or 130 ° C; in addition, the heating temperature may also be adjusted according to actual needs.
  • the number of the heating device 120 may be one or more, and the shape and size of the heating device 120 may be arbitrary, as long as the battery pole piece assembly can be heated.
  • the heating device 120 may include first heating members 122 and The second heating element 124, the first heating element 122 is disposed on the first rolling roller 132, the second heating element 124 is disposed on the second rolling roller 134, so that the first heating element 122 and the first The gap between the two heating elements 124 is at substantially the same level as the gap between the first roller 132 and the second roller 134. Moreover, the distance between the first heating element 122 and the second heating element 124 matches the thickness of the battery pole piece assembly, so that the first heating element 122 and the second heating element 124 can respectively The battery pole piece assembly is heated from both sides.
  • first heating element 122 and the second heating element 124 may have the same or different shapes and sizes.
  • the first heating element 122 and the second heating element 124 have the same shape and size.
  • the specific structure of the first heating element 122 is described in detail in this disclosure.
  • the first heating element 122 includes a heating plate 122a, a heat insulating plate 122b, and a heating wire 122c, the heating wire 122c is embedded in the heating plate 122a, and the insulating plate 122b is disposed in the The heating plate 122a is away from the side of the heating wire 122c, and the heating plate 122a is disposed on the first rolling roller 132 through the heat insulation plate 122b so that the heating plate 122a is away from the heat insulation plate 122b
  • One side, that is, the side provided with the heating wire 122c faces the battery pole piece assembly to be heated, so as to heat the battery pole piece assembly.
  • the shape of the heating surface of the heating plate 122a may be a regular shape such as a circle or a square, or any irregular shape, and optionally, the heating wire 122c may be one or Multiple roots.
  • the pole piece and the separator in the battery pole piece assembly can be uniformly heated, and the consistency of the pole piece bonding is improved.
  • the heat insulation plate 122b can effectively prevent the user from being scalded during the operation of the user, and prevent the heat generated by the heating plate 122a from adversely affecting other components.
  • the first roller 132 and the second roller 134 may have the same or different shapes and sizes.
  • the first rolling roller 132 and the second rolling roller 134 may have the same or different shapes and sizes.
  • the first rolling roller 132 and the second rolling roller 134 may have the same or different shapes and sizes.
  • the shapes and sizes of the plurality of grooves 133 on each of the first roller 132 and the second roller 134 may be the same or different.
  • the shape and size of the first rolling roller 132 and the second rolling roller are the same, and the plurality of grooves 133 provided on the first rolling roller 132 have the same shape and size and are sequentially arranged at intervals.
  • the groove 133 may be a strip groove or an annular groove, which is not specifically limited herein.
  • the groove 133 is an annular groove is exemplarily shown, and the annular groove is on the first rolling roller 132 and / or the second rolling roller 134
  • the opening position can ensure that both ends of all battery pole piece assemblies with different widths in the rolling range are thermally compounded, and the intermittent evacuation near the middle position is convenient for subsequent follow-up of the laminated battery pole piece assembly Take a piece.
  • the driving device includes a servo motor, a first driving assembly, and a third Two driving components, the first driving component is connected to the first roller 132, the second driving component is connected to the second roller 134, the servo motor is connected to the first driving component and The second driving assembly is connected to simultaneously drive the first driving assembly and the second driving assembly, thereby simultaneously driving the first rolling roller 132 and the second rolling roller 134 to rotate, wherein, The rotation speeds of the first rolling roller 132 and the second rolling roller 134 are the same in the opposite directions.
  • the first roller 132 and the second roller 134 are driven by the servo motor at the same time, thereby obtaining a better pressing effect, and at the same time, avoiding the increase in cost caused by the use of different driving equipment and Problems with complex structures.
  • first drive assembly and the second drive assembly may be drive shafts or bearings.
  • the battery pole piece thermal recombination device 100 may further include a support base 140 and a pressing cylinder 150, see FIG. 1.
  • the supporting base 140 is disposed on the base 110
  • the down-pressing cylinder 150 is disposed on the supporting base 140 and is connected to the first rolling roller 132 to provide down pressure to the first rolling roller 132 pressure.
  • the battery pole piece thermal composite device 100 may also include an auxiliary cylinder 160, a sliding plate 170, and a connecting plate 180, see FIG.
  • the auxiliary cylinder 160 is disposed on the support base 140, the first rolling roller 132 is disposed on the connecting plate 180, and the connecting plate 180 is connected to the supporting base 140 through the sliding plate 170, so that The auxiliary cylinder 160 drives the first rolling roller 132 provided on the connecting plate 180 to slide up and down along the sliding plate 170 to adjust the gap between the first rolling roller 132 and the second rolling roller 134 distance.
  • the battery pole piece thermal recombination device 100 may further include a transition rotating roller 190, see FIG. 2.
  • the transitional rotating roller 190 is disposed on the base 110 and is located on a side of the electrode rolling device 130 away from the heating device 120, and is used to transfer the pressed battery pole piece assembly.
  • the battery pole piece thermal recombination device 100 provided by the present disclosure is provided with a base 110, a heating device 120 and an electrode rolling device 130.
  • the electrode rolling device 130 is provided with a first rolling roller 132 and a second rolling roller 134 and the driving device, and a plurality of grooves 133 are provided on the outer surface of the first rolling roller 132, so that the battery pole piece assembly is thermally compressed by using the above battery pole piece thermal recombination device 100
  • the battery pole piece assembly can realize rapid liquid injection, thereby reducing the electrolyte penetration time in the subsequent liquid injection process, thereby speeding up the entire production process.
  • the press-down cylinder 150 By setting the press-down cylinder 150, the obtained uniformity of the pressed battery pole piece assembly is better, and the pressing effect is better.
  • auxiliary cylinder 160 By setting the auxiliary cylinder 160, the sliding plate 170, the connecting plate 180, and the transitional rotating roller 190 to adjust the distance between the first roller 132 and the second roller 134, different battery pole piece assemblies can be adjusted
  • the thermal compression bonding makes the battery pole piece thermal composite device 100 more practical.
  • the present disclosure provides a battery pole piece thermal composite device.
  • the battery pole piece assembly obtained by the device can realize rapid liquid injection with better uniformity and better pressing effect, and can be used for different batteries.
  • the pole piece has strong practicability for pressing, which can effectively meet the rapid growth of the new energy market's demand for batteries; and the simple structure of the device is conducive to significantly reducing production costs.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Secondary Cells (AREA)

Abstract

涉及锂离子电池制造技术领域，具体提供一种电池极片热复合设备（100），包括基座（110）、加热装置（120）以及设置于基座（110）的电极碾压装置（130），加热装置（120）设置于电极碾压装置（130），电极碾压装置（130）包括第一碾压辊（132）、第二碾压辊（134）以及驱动器件，所述第一碾压辊（132）和第二碾压辊（134）分别与驱动器件连接，第一碾压辊（132）与第二碾压辊（134）并排设置，且第一碾压辊（132）与第二碾压辊（134）之间具有供电池极片组件通过的间隙，第一碾压辊（132）和/或第二碾压辊（134）的外表面上设置有多个凹槽（133），加热装置（120）用于对电池极片组件进行加热后传送至第一碾压辊（132）与第二碾压辊（134）之间的间隙以通过第一碾压辊（132）和第二碾压辊（134）进行热压合，以使通过上述设备压合获得的电池极片组件能够实现快速注液，进而使电池极片热复合设备的实用性更强。

Description

电池极片热复合设备及其用于热压合电池极片组件的方法
相关申请的交叉引用
本公开要求于2018年10月16日提交中国专利局的申请号为CN201811204403.2、名称为“电池极片热复合设备”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及锂离子电池制造技术领域，具体而言，涉及一种电池极片热复合设备及其用于热压合电池极片组件的方法。
背景技术
目前，锂离子电池制造通常采用叠片工艺，具体采用热复合叠片的方式进行制造，具体的，在叠片之前需将正极料带、负极料带及隔离膜带经发热装置烤热后，采用适当的压力将上述三者进行碾压，使其相互贴合在一起形成整体。
发明人经研究发现，采用上述方式获得的电芯结构较紧，隔膜与极片之间的间隙几乎为零，导致后续注液工序中电解液渗透时间较长，难以满足现在新能源市场对动力电池快速增长的需求，因此，如何实现对正极料带、负极料带及隔离膜带进行热复合后得到的叠片能够快速注液是亟待解决的技术问题。
发明内容
本公开提供了一种电池极片热复合设备及其用于热压合电池极片组件的方法，以有效缓解上述技术问题。
本公开的实施例例如可以通过如下方式来实现：
本公开实施例提供的电池极片热复合设备，用于对电池极片组件进行热压合，所述电池极片热复合设备包括基座、加热装置以及设置于所述基座的电极碾压装置，所述加热装置设置于所述电极碾压装置；
所述电极碾压装置包括第一碾压辊、第二碾压辊以及驱动器件，所述第一碾压辊和第二碾压辊均与所述驱动器件连接，所述第一碾压辊与第二碾压辊并排设置，且第一碾压辊与第二碾压辊之间具有供电池极片组件通过的间隙，所述第一碾压辊和/或第二碾压辊的外表面上设置有多个凹槽，所述加热装置用于对所述电池极片组件进行加热，经加热后的电池极片组件被传送至所述第一碾压辊与第二碾压辊之间的间隙以通过所述第一碾压辊和第二碾压辊进行热压合。
可选的，在上述电池极片热复合设备中，所述第一碾压辊的形状和大小与所述第二碾压辊的形状和大小相同，且所述第一碾压辊上设置有形状和大小相同且依次间隔的多个凹 槽。
可选的，在上述电池极片热复合设备中，所述第二碾压辊上设置有形状和大小相同且依次间隔的多个凹槽。
可选的，在上述电池极片热复合设备中，所述凹槽为环状凹槽。
可选的，在上述电池极片热复合设备中，所述驱动器件包括伺服电机、第一驱动组件和第二驱动组件，所述第一驱动组件与所述第一碾压辊连接，所述第二驱动组件与所述第二碾压辊连接，所述伺服电机与所述第一驱动组件和所述第二驱动组件两者连接以同时驱动所述第一驱动组件和所述第二驱动组件，以带动所述第一碾压辊和所述第二碾压辊同时转动，且所述第一碾压辊和第二碾压辊的转速相同方向相反。
可选的，在上述电池极片热复合设备中，所述加热装置设置成处于与所述第一碾压辊和第二碾压辊之间的间隙基本上相同的水平处。
可选的，在上述电池极片热复合设备中，所述加热装置包括彼此对置的第一加热件和第二加热件，所述第一加热件设置于所述第一碾压辊，所述第二加热件设置于所述第二碾压辊，使得第一加热件和第二加热件之间的间隙处于与所述第一碾压辊和第二碾压辊之间的间隙基本上相同的水平处，且所述第一加热件与所述第二加热件之间的距离与所述电池极片组件的厚度相匹配，使得第一加热件和第二加热件能够分别从两侧对所述电池极片组件进行加热。
可选的，在上述电池极片热复合设备中，所述第一加热件与所述第二加热件的形状和大小相同，所述第一加热件和所述第二加热件中的每一者均包括加热板、隔热板以及加热丝，所述加热丝嵌设于所述加热板，所述隔热板设置于所述加热板远离所述加热丝的一侧，且所述加热板通过所述隔热板设置于所述第一碾压辊，且所述加热板远离所述隔热板的一侧即设置有加热丝的一侧面向待被加热的所述电池极片组件，以对所述电池极片组件进行加热。
可选的，在上述电池极片热复合设备中，所述所述第一加热件和/或所述第二加热件具有圆形或方形的加热表面。
可选的，在上述电池极片热复合设备中，所述第一加热件和/或所述第二加热件具有一根加热丝，且所述加热丝呈蛇形嵌设于所述加热板。
可选的，在上述电池极片热复合设备中，所述第一加热件和/或所述第二加热件具有多根加热丝，且所述加热丝并排平行嵌设于所述加热板。
可选的，在上述电池极片热复合设备中，所述电池极片热复合设备还包括支撑座和下压气缸，所述支撑座设置于所述基座，所述下压气缸设置于所述支撑座并与所述第一碾压辊连接以对所述第一碾压辊提供下压压力。
可选的，在上述电池极片热复合设备中，所述电池极片热复合设备还包括辅助气缸、滑板以及连接板，所述辅助气缸设置于所述支撑座，所述第一碾压辊设置于所述连接板，且所述连接板通过所述滑板与所述支撑座连接，以使所述辅助气缸带动设置于所述连接板的第一碾压辊沿所述滑板上下滑动，以调节所述第一碾压辊与所述第二碾压辊之间的距离。
可选的，在上述电池极片热复合设备中，所述电池极片热复合设备还包括过渡旋转辊，所述过渡旋转辊设置于所述基座并位于所述电极碾压装置远离所述加热装置的一侧，用于传送压合后的电池极片组件。
本公开还提供了一种电池极片热复合设备，用于对电池极片组件进行热压合，所述电池极片热复合设备包括：所述电池极片热复合设备包括基座、加热装置、过渡旋转辊以及设置于所述基座的电极碾压装置，所述加热装置设置于所述电极碾压装置；
所述电极碾压装置包括第一碾压辊、第二碾压辊以及驱动器件，所述第一碾压辊和第二碾压辊均与所述驱动器件连接，所述第一碾压辊与第二碾压辊并排设置，且第一碾压辊与第二碾压辊之间具有供电池极片组件通过的间隙，所述第一碾压辊和第二碾压辊的形状和大小下相同且外表面分别依次间隔设置有多个凹槽，所述加热装置用于对所述电池极片组件进行加热，经加热后的所述电池极片组件被传送至所述第一碾压辊与第二碾压辊之间的间隙以通过所述第一碾压辊和第二碾压辊进行热压合，所述过渡旋转辊设置于所述基座并位于所述电极碾压装置远离所述加热装置的一侧，用于传送压合后的电池极片组件。
本公开还提供了一种使用上述电池极片热复合设备对电池极片组件进行热压合的方法，所述方法包括：通过所述加热装置对电池极片组件进行加热，以及将经加热后的所述电池极片组件传送至所述第一碾压辊与第二碾压辊之间的间隙以通过所述第一碾压辊和第二碾压辊进行热压合。
可选的，在上述对电池极片组件进行热压合的方法中，所述第一碾压辊的形状和大小与所述第二碾压辊的形状和大小相同，且所述第一碾压辊上设置有形状和大小彼此相同且依次间隔的多个凹槽。
可选的，在上述对电池极片组件进行热压合的方法中，所述第二碾压辊上设置有形状和大小相同且依次间隔的多个凹槽。
可选的，在上述对电池极片组件进行热压合的方法中，所述凹槽为环状凹槽。
可选的，在对电池极片组件进行热压合的方法中，所述加热装置包括彼此对置的第一加热件和第二加热件，所述第一加热件设置于所述第一碾压辊，所述第二加热件设置于所述第二碾压辊，使得所述第一加热件和第二加热件之间的间隙处于与所述第一碾压辊和第二碾压辊之间的间隙基本上相同的水平处，且所述第一加热件与所述第二加热件之间的距离与所述电池极片组件的厚度相匹配，使得所述第一加热件和第二加 热件能够分别从两侧对所述电池极片组件进行加热。
本公开实施例提供的电池极片热复合设备，通过设置基座、加热装置以及电极碾压装置，且电极碾压装置通过设置第一碾压辊、第二碾压辊以及驱动器件，并在第一碾压辊和/或第二碾压辊的外表面上设置多个凹槽，以使通过上述电池极片热复合设备对电池极片组件进行热压合得到的压合后的电池极片组件具有未压实的过渡区，从而实现快速注液，提高电池极片热复合设备的实用性。
为使本公开的上述目的、特征和优点能更明显易懂，下文特举较佳实施例，并配合所附附图，作详细说明如下。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本公开的某些实施例，因此不应被看作是对范围的限定，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相关的附图。
图1为本公开实施例提供的电池极片热复合设备的结构示意图。
图2为本公开实施例提供的电池极片热复合设备的另一结构示意图。
图3为本公开实施例提供的第一碾压辊的结构示意图。
图4为本公开实施例提供的第一加热件的结构示意图。
图标：100-电池极片热复合设备；110-基座；120-加热装置；122-第一加热件；122a-加热板；122b-隔热板；122c-加热丝；124-第二加热件；130-电极碾压装置；132-第一碾压辊；133-凹槽；134-第二碾压辊；140-支撑座；150-下压气缸；160-辅助气缸；170-滑板；180-连接板；190-过渡旋转辊。
具体实施方式
下面将结合本公开实施例中附图，对本公开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公开一部分实施例，而不是全部的实施例。通常在此处附图中描述和示出的本公开实施例的组件可以以各种不同的配置来布置和设计。因此，以下对在附图中提供的本公开的实施例的详细描述并非旨在限制要求保护的本公开的范围，而是仅仅表示本公开的选定实施例。基于本公开的实施例，本领域技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例，都属于本公开保护的范围。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。同时，在本公开的描述中，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
请结合图1和图2，本公开实施例提供了一种电池极片热复合设备100，用于对电池极 片组件进行热压合，所述电池极片热复合设备100包括基座110、加热装置120以及设置于所述基座110的电极碾压装置130，所述加热装置120设置于所述电极碾压装置130。
可选地，在本公开实施例中，所述电极碾压装置130可以包括第一碾压辊132、第二碾压辊134以及驱动器件，所述第一碾压辊132和第二碾压辊134分别与所述驱动器件连接，所述第一碾压辊132与第二碾压辊134并排设置，且第一碾压辊132与第二碾压辊134之间具有供电池极片组件通过的间隙。可选地，所述加热装置120被设置成处于与第一碾压辊132与第二碾压辊134之间的间隙基本上相同的水平处。请结合图3，可选地，所述第一碾压辊132的外表面上设置有多个凹槽133，类似地，第二碾压辊134的外表面上同样可选地可以设置有多个凹槽133。所述加热装置120用于对所述电池极片组件进行加热，加热后的电池极片组件被传送至所述第一碾压辊132与第二碾压辊134之间的间隙以通过所述第一碾压辊132和第二碾压辊134进行热压合。
需要说明的是，在本公开实施例中，所述电池极片组件可以包括依次层叠设置的正极片、第一隔膜、负极片以及第二隔膜，也可以仅包括依次层叠的第一隔膜、负极片以及第二隔膜，可选地，所述电池极片组件还可以包括多个电极片，其中每个电极片的两侧都具有隔膜。
通过采用上述的电池极片热复合设备100对上述的电池极片组件进行压合时，使用加热装置120对所述电池极片组件进行加热，经加热后的电池极片组件被传送至所述第一碾压辊132与第二碾压辊134之间的间隙以通过所述第一碾压辊132和第二碾压辊134进行热压合，由于第一碾压辊132和/或第二碾压辊134上具有凹槽133，因此在进行压合的过程中，电池级片组件的与凹槽133对应的部分未被压实，而电池级片组件的与相邻两个凹槽133之间的部分对应的部分被压实，使获得的压合后的电池极片组件中的隔膜具有过渡区，相应地，在采用上述的压合后的电池极片组件制作电池时，电解液可以通过过渡区快速渗透压合后的电池极片组件，从而实现快速注液，即降低后续注液工序中电解液渗透时间，进而加速整个生产过程。
所述基座110的形状可以是任意的，例如，可以是长方体状、圆台状或柱状等规则形状，也可以是任意不规则形状，在此不作具体限定。
可选地，所述加热装置120对电池极片组件进行加热的温度可以包括但不限于80℃、90℃、110℃或130℃；此外，加热温度还可以根据实际需求进行调整。
可选地，所述加热装置120的数量可以是一个或者多个，所述加热装置120的形状和大小可以是任意的，只要能够实现对所述电池极片组件进行加热即可。
可选地，为使所述加热装置120对所述电池极片组件进行均匀加热，在本公开实施例中，参见图2，所述加热装置120可以包括彼此对置的第一加热件122和第二加热件124， 所述第一加热件122设置于所述第一碾压辊132，所述第二加热件124设置于所述第二碾压辊134，使得第一加热件122和第二加热件124之间的间隙处于与所述第一碾压辊132和所述第二碾压辊134之间的间隙基本上相同的水平处。而且，所述第一加热件122与所述第二加热件124之间的距离与所述电池极片组件的厚度相匹配，以使所述第一加热件122和第二加热件124能够分别从两侧对所述电池极片组件进行加热。
可选地，所述第一加热件122与所述第二加热件124可以具有相同或者不同的形状和大小。
为进一步提高所述加热装置120对所述电池极片组件的加热效果，在本公开实施例中，所述第一加热件122与所述第二加热件124的形状和大小均相同。为便于描述，本公开中仅对第一加热件122的具体结构进行详细描述。请结合图4，所述第一加热件122包括加热板122a、隔热板122b以及加热丝122c，所述加热丝122c嵌设于所述加热板122a，所述隔热板122b设置于所述加热板122a远离所述加热丝122c的一侧，所述加热板122a通过所述隔热板122b设置于所述第一碾压辊132，使得所述加热板122a远离所述隔热板122b的一侧即设置有加热丝122c的一侧面向待被加热的所述电池极片组件，以对所述电池极片组件进行加热。
可选地，所述加热板122a的用于加热的表面的形状可以是圆形或方形等规则形状，也可以是任意不规则形状，并且可选地，所述加热丝122c可以是一根或者多根。
在本公开实施例中，示例性地示出所述加热板122a的用于加热的表面为长方形的情形，当所述加热丝122c为一根时，所述加热丝122c可选地可以呈蛇形嵌设于所述加热板122a，当所述加热丝122c为多根时，多根所述加热丝122c可选地可以并排平行嵌设于所述加热板122a。
通过上述设置，由于采用第一加热件122与所述第二加热件124同时加热，可使电池极片组件中的极片和隔膜均匀受热，提高极片贴合的一致性。此外，通过设置隔热板122b可以有效避免用户操作过程中烫伤用户的情况，并且避免加热板122a发出的热量对其他部件造成不利影响的情况。
可选地，所述第一碾压辊132和第二碾压辊134可以具有相同或者不同的形状和大小。可选地，在所述第一碾压辊132和所述第二碾压辊134上均设置有凹槽133的情况下，所述第一碾压辊132和所述第二碾压辊134上的凹槽133的数量可以是相同的，也可以是不同的；并且所述第一碾压辊132上的所述凹槽133与所述第二碾压辊134上的所述凹槽133可以具有相同或者不同的形状和大小。可选地，所述第一碾压辊132和所述第二碾压辊134每一者上的多个凹槽133的形状和大小也可以是相同的，或者是不同的。
为使获得的压合后的电池极片组件中极片与隔膜贴合效果更佳，在本公开实施例中， 所述第一碾压辊132的形状和大小与所述第二碾压辊134的形状和大小相同，且所述第一碾压辊132上设置的多个凹槽133形状和大小相同且依次间隔设置。
可选地，所述凹槽133可以是条形凹槽，也可以是环状凹槽，在此不作具体限定。在本公开实施例中，示例性地示出所述凹槽133为环状凹槽的情形，所述环状凹槽在所述第一碾压辊132和/或第二碾压辊134上的开设位置能够保证对碾压范围内所有不同宽度的电池极片组件的两端均进行热复合，而靠近中间位置处间断性的避空，以方便后续对压合后的电池极片组件进行取片。
可以理解，上述环状凹槽的开设数量、位置、槽宽、槽深及槽的形状会根据不同的需求及场合进行设置，在此不作具体限定。
为便于实现所述驱动器件同步控制所述第一碾压辊132和第二碾压辊134，在本公开实施例中，可选地，所述驱动器件包括伺服电机、第一驱动组件和第二驱动组件，所述第一驱动组件与所述第一碾压辊132连接，所述第二驱动组件与所述第二碾压辊134连接，所述伺服电机与所述第一驱动组件和所述第二驱动组件两者连接以同时驱动所述第一驱动组件和所述第二驱动组件，进而同时带动所述第一碾压辊132和所述第二碾压辊134转动，其中，所述第一碾压辊132和第二碾压辊134的转速相同方向相反。
通过上述设置，所述第一碾压辊132和第二碾压辊134同时由所述伺服电机驱动，进而获得更优的压合效果，同时，还避免了采用不同的驱动设备造成成本增加以及结构复杂的问题。
需要说明的是，可选地，上述的第一驱动组件和第二驱动组件可以是驱动转轴或轴承。
为使所述第一碾压辊132和第二碾压辊134在对所述电池极片组件进行压合时压力均匀，进而使压合后的电池极片组件的压合效果更佳，在本公开实施例中，可选地，所述电池极片热复合设备100还可以包括支撑座140和下压气缸150，参见图1。所述支撑座140设置于所述基座110，所述下压气缸150设置于所述支撑座140并与所述第一碾压辊132连接以对所述第一碾压辊132提供下压压力。
为实现对不同的电池极片组件进行热压合，以使所述电池极片热复合设备100的实用性更强，在本公开实施例中，可选地，所述电池极片热复合设备100还可以包括辅助气缸160、滑板170以及连接板180，参见图2。所述辅助气缸160设置于所述支撑座140，所述第一碾压辊132设置于所述连接板180，且所述连接板180通过所述滑板170与所述支撑座140连接，以使所述辅助气缸160带动设置于所述连接板180的第一碾压辊132沿所述滑板170上下滑动，以调节所述第一碾压辊132与所述第二碾压辊134之间的距离。
为避免在对压合后的电池极片组件进行传送的过程中被损坏的问题，进而进一步提高所述电池极片热复合设备100的实用性，在本公开实施例中，可选地，所述电池极片热复 合设备100还可以包括过渡旋转辊190，参见图2。所述过渡旋转辊190设置于所述基座110并位于所述电极碾压装置130远离所述加热装置120的一侧，用于传送压合后的电池极片组件。
综上，本公开提供的电池极片热复合设备100，通过设置基座110、加热装置120以及电极碾压装置130，电极碾压装置130通过设置第一碾压辊132、第二碾压辊134以及驱动器件，并在第一碾压辊132的外表面上设置多个凹槽133，以使采用上述电池极片热复合设备100对电池极片组件进行热压合得到的压合后的电池极片组件能够实现快速注液，进而降低后续注液工序中电解液渗透时间，进而加速整个生产过程。通过设置下压气缸150以使获得的压合后的电池极片组件的均匀性更好压合效果更佳。通过设置辅助气缸160、滑板170、连接板180以及过渡旋转辊190以调节所述第一碾压辊132与所述第二碾压辊134之间的距离，进而能够对不同的电池极片组件进行热压合，使所述电池极片热复合设备100的实用性更强。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应所述以权利要求的保护范围为准。
工业实用性：
综上所述，本公开提供了一种电池极片热复合设备，通过该设备获得的电池极片组件能够实现快速注液且均匀性更好、压合效果更佳，并且能够对不同的电池极片进行压合实用性强，能够有效满足新能源市场对电池快速增长的需求；且该设备结构简单有利于显著降低生产成本。

Claims (20)

  1. 一种电池极片热复合设备，用于对电池极片组件进行热压合，其特征在于，所述电池极片热复合设备包括基座、加热装置以及设置于所述基座的电极碾压装置，所述加热装置设置于所述电极碾压装置；
    所述电极碾压装置包括第一碾压辊、第二碾压辊以及驱动器件，所述第一碾压辊和第二碾压辊均与所述驱动器件连接，所述第一碾压辊与第二碾压辊并排设置，且第一碾压辊与第二碾压辊之间具有供电池极片组件通过的间隙，所述第一碾压辊和/或第二碾压辊的外表面上设置有多个凹槽，所述加热装置用于对所述电池极片组件进行加热，经加热后的所述电池极片组件被传送至所述第一碾压辊与第二碾压辊之间的间隙以通过所述第一碾压辊和第二碾压辊进行热压合。
  2. 根据权利要求1所述的电池极片热复合设备，其特征在于，所述第一碾压辊的形状和大小与所述第二碾压辊的形状和大小相同，且所述第一碾压辊上设置有形状和大小彼此相同且依次间隔的多个凹槽。
  3. 根据权利要求1或2所述的电池极片热复合设备，其特征在于，所述第二碾压辊上设置有形状和大小相同且依次间隔的多个凹槽。
  4. 根据权利要求1至3中任一项所述的电池极片热复合设备，其特征在于，所述凹槽为环状凹槽。
  5. 根据权利要求1至4中任一项所述的电池极片热复合设备，其特征在于，所述驱动器件包括伺服电机、第一驱动组件和第二驱动组件，所述第一驱动组件与所述第一碾压辊连接，所述第二驱动组件与所述第二碾压辊连接，所述伺服电机与所述第一驱动组件和所述第二驱动组件两者连接以同时驱动所述第一驱动组件和所述第二驱动组件，以带动所述第一碾压辊和所述第二碾压辊同时转动，且所述第一碾压辊和第二碾压辊的转速相同方向相反。
  6. 根据权利要求1至5中任一项所述的电池极片热复合设备，其特征在于，所述加热装置设置成处于与所述第一碾压辊和第二碾压辊之间的间隙基本上相同的水平处。
  7. 根据权利要求1至6中任一项所述的电池极片热复合设备，其特征在于，所述加热装置包括彼此对置的第一加热件和第二加热件，所述第一加热件设置于所述第一碾压辊，所述第二加热件设置于所述第二碾压辊，使得所述第一加热件和第二加热件之间的间隙处于与所述第一碾压辊和第二碾压辊之间的间隙基本上相同的水平处，且所述第一加热件与所述第二加热件之间的距离与所述电池极片组件的厚度相匹配，使得所述第一加热件和第二加热件能够分别从两侧对所述电池极片组件进行加热。
  8. 根据权利要求7所述的电池极片热复合设备，其特征在于，所述第一加热件与所 述第二加热件的形状和大小相同，所述第一加热件和所述第二加热件中的每一者均包括加热板、隔热板以及加热丝，所述加热丝嵌设于所述加热板，所述隔热板设置于所述加热板远离所述加热丝的一侧，且所述加热板通过所述隔热板设置于所述碾压辊，且所述加热板远离所述隔热板的一侧即设置有加热丝的一侧面向待被加热的所述电池极片组件，以对所述电池极片组件进行加热。
  9. 根据权利要求7或8所述的电池极片热复合设备，其特征在于，所述所述第一加热件和/或所述第二加热件具有圆形或方形的加热表面。
  10. 根据权利要求8或9所述的电池极片热复合设备，其特征在于，所述第一加热件和/或所述第二加热件具有一根加热丝，且所述加热丝呈蛇形嵌设于所述加热板。
  11. 根据权利要求8或9所述的电池极片热复合设备，其特征在于，所述第一加热件和/或所述第二加热件具有多根加热丝，且所述加热丝并排平行嵌设于所述加热板。
  12. 根据权利要求1至11中任一项所述的电池极片热复合设备，其特征在于，所述电池极片热复合设备还包括支撑座和下压气缸，所述支撑座设置于所述基座，所述下压气缸设置于所述支撑座并与所述第一碾压辊连接以对所述第一碾压辊提供下压压力。
  13. 根据权利要求1至12中任一项所述的电池极片热复合设备，其特征在于，所述电池极片热复合设备还包括辅助气缸、滑板以及连接板，所述辅助气缸设置于所述支撑座，所述第一碾压辊设置于所述连接板，且所述连接板通过所述滑板与所述支撑座连接，以使所述辅助气缸带动设置于所述连接板的第一碾压辊沿所述滑板上下滑动，以调节所述第一碾压辊与所述第二碾压辊之间的距离。
  14. 根据权利要求1至13中任一项所述的电池极片热复合设备，其特征在于，所述电池极片热复合设备还包括过渡旋转辊，所述过渡旋转辊设置于所述基座并位于所述电极碾压装置远离所述加热装置的一侧，用于传送压合后的电池极片组件。
  15. 一种电池极片热复合设备，其特征在于，包括：所述电池极片热复合设备包括基座、加热装置、过渡旋转辊以及设置于所述基座的电极碾压装置，所述加热装置设置于所述电极碾压装置；
    所述电极碾压装置包括第一碾压辊、第二碾压辊以及驱动器件，所述第一碾压辊和第二碾压辊均与所述驱动器件连接，所述第一碾压辊与第二碾压辊并排设置，且第一碾压辊与第二碾压辊之间具有供电池极片组件通过的间隙，所述第一碾压辊和第二碾压辊的形状和大小相同且外表面分别依次间隔设置有多个凹槽，所述加热装置用于对所述电池极片组件进行加热，经加热后的所述电池极片组件被传送至所述第一碾压辊与第二碾压辊之间的间隙以通过所述第一碾压辊和第二碾压辊进行热压合，所述过 渡旋转辊设置于所述基座并位于所述电极碾压装置远离所述加热装置的一侧，用于传送压合后的电池极片组件。
  16. 一种使用根据权利要求1至15中任一项所述的电池极片热复合设备对电池极片组件进行热压合的方法，其特征在于，包括：通过所述加热装置对电池极片组件进行加热，以及将经加热后的所述电池极片组件传送至所述第一碾压辊与第二碾压辊之间的间隙以通过所述第一碾压辊和第二碾压辊进行热压合。
  17. 根据权利要求16所述的对电池极片组件进行热压合的方法，其特征在于，所述第一碾压辊的形状和大小与所述第二碾压辊的形状和大小相同，且所述第一碾压辊上设置有形状和大小彼此相同且依次间隔的多个凹槽。
  18. 根据权利要求16或17所述的对电池极片组件进行热压合的方法，其特征在于，所述第二碾压辊上设置有形状和大小相同且依次间隔的多个凹槽。
  19. 根据权利要求16至18中任一项所述的对电池极片组件进行热压合的方法，其特征在于，所述凹槽为环状凹槽。
  20. 根据权利要求16至19中任一项所述的对电池极片组件进行热压合的方法，其特征在于，所述驱动器件包括伺服电机、第一驱动组件和第二驱动组件，所述第一驱动组件与所述第一碾压辊连接，所述第二驱动组件与所述第二碾压辊连接，所述伺服电机与所述第一驱动组件和所述第二驱动组件两者连接以同时驱动所述第一驱动组件和所述第二驱动组件，以带动所述第一碾压辊和所述第二碾压辊同时转动，且所述第一碾压辊和第二碾压辊的转速相同方向相反。
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