WO2020259693A1 - 用于电芯制造的叠片方法和电芯极组制造装备 - Google Patents

用于电芯制造的叠片方法和电芯极组制造装备 Download PDF

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Publication number
WO2020259693A1
WO2020259693A1 PCT/CN2020/098589 CN2020098589W WO2020259693A1 WO 2020259693 A1 WO2020259693 A1 WO 2020259693A1 CN 2020098589 W CN2020098589 W CN 2020098589W WO 2020259693 A1 WO2020259693 A1 WO 2020259693A1
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WIPO (PCT)
Prior art keywords
diaphragm
conveying device
electrode sheet
negative electrode
separator
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Ceased
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PCT/CN2020/098589
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English (en)
French (fr)
Inventor
徐春龙
滕立杰
郑赫
赵凯
金正贤
金省周
王辉
王洋
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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Publication date
Application filed by Svolt Energy Technology Co Ltd filed Critical Svolt Energy Technology Co Ltd
Publication of WO2020259693A1 publication Critical patent/WO2020259693A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H01M10/05—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
    • 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
    • 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

  • This application relates to the field of vehicle manufacturing, in particular, to a lamination method for battery cell manufacturing and battery cell electrode assembly manufacturing equipment.
  • the z-shaped lamination technology is usually used when manufacturing the electrode assembly of the battery. That is, when lamination, the negative electrode sheet is first laminated, and then the negative electrode sheet is covered with a separator, and then the positive electrode sheet is laminated. Wrap the separator around the positive electrode.
  • the lamination unit of the lamination method is a single pole piece or a single diaphragm, and the speed of using this lamination method is relatively slow, resulting in low efficiency of cell manufacturing.
  • the purpose of this application is to propose a lamination method that can at least improve the manufacturing efficiency of the cell electrode group to a certain extent.
  • a stacking method includes installing a positive electrode sheet, a negative electrode sheet, a first separator, and a second separator into a laminated unit, and folding a plurality of the laminated units to form a set of cell electrode groups, wherein
  • the installation of the positive electrode sheet, the negative electrode sheet, the first diaphragm and the second diaphragm into a laminated unit includes: arranging the first diaphragm and the second diaphragm opposite to each other, and inserting the positive electrode sheets into the first diaphragm and the second diaphragm one by one And staggered on the side of the first diaphragm away from the second diaphragm and on the side of the second diaphragm away from the first diaphragm.
  • the installing the positive electrode sheet, the negative electrode sheet, the first separator, and the second separator into a laminated unit further includes: connecting the first separator, the second separator, and the positive electrode sheet. , The step of fixing the negative electrode sheet.
  • the folding a plurality of the laminated units to form a set of battery cell pole groups includes: setting a pre-folded position between two adjacent laminated units. Trace the steps.
  • the folding a plurality of the lamination units into a set of battery cell pole groups further includes: folding and clamping the plurality of the lamination units through the pre-folds The steps of forming a set of cell poles.
  • the folding a plurality of the lamination units to form a set of cell pole groups further includes: arranging the first cell between two adjacent groups of the cell pole groups A step of cutting a diaphragm and the second diaphragm.
  • the folding a plurality of the lamination units to form a set of battery cell pole groups further includes: performing diaphragm tail winding and glueing the cut out of the battery cell pole group A step of.
  • the lamination method described in this application has the following advantages:
  • two diaphragms can be laminated at the same time, which shortens the manufacturing time of the cell pole group, improves the manufacturing efficiency of the cell pole group, and thereby improves the cell manufacturing efficiency.
  • Another purpose of this application is to provide a battery cell electrode assembly manufacturing equipment, including: a positive electrode plate conveying device, a first negative electrode plate conveying device, a second negative electrode plate conveying device, a first diaphragm conveying device, and a second diaphragm A conveying device, the first diaphragm conveying device and the second diaphragm conveying device are arranged oppositely, the positive electrode plate conveying device is sandwiched between the first diaphragm conveying device and the second diaphragm conveying device, so The first negative electrode plate conveying device is located on the side of the first diaphragm conveying device away from the second diaphragm conveying device, and the second negative electrode plate conveying device is located on the second diaphragm conveying device away from the first One side of the diaphragm conveying device, the first negative electrode plate conveying device and the second negative electrode plate conveying device are used to alternately be on the side of the first diaphragm facing away from the second diaphra
  • the first diaphragm conveying device and the second diaphragm conveying device both include: a diaphragm unwinding roller
  • the positive electrode plate conveying device includes: a positive electrode plate unwinding roller and a positive electrode plate A cutting piece, the positive electrode plate cutting piece is used to cut the positive electrode sheet into the positive electrode sheet before the positive electrode sheet discharged from the positive electrode sheet is unrolled and rolled into the first separator and the second separator
  • Each of the first negative electrode plate conveying device and the second negative electrode plate conveying device includes: a negative plate material unwinding roller and a negative electrode plate cutting piece, and the negative plate material cutting piece is used for Cutting the negative electrode sheet discharged from the negative electrode sheet into the negative electrode sheet.
  • the cell electrode assembly manufacturing equipment further includes: a thermal lamination mechanism, the thermal lamination mechanism includes: two pressure rollers and a heating part, the two pressure rollers are suitable for jointly The first separator, the second separator, the positive electrode sheet, and the negative electrode sheet are compressed, and the heating part is adapted to heat the first separator and the second separator to heat the first separator The separator, the second separator, the positive electrode sheet, and the negative electrode sheet are thermally bonded and fixed.
  • a thermal lamination mechanism includes: two pressure rollers and a heating part, the two pressure rollers are suitable for jointly The first separator, the second separator, the positive electrode sheet, and the negative electrode sheet are compressed, and the heating part is adapted to heat the first separator and the second separator to heat the first separator The separator, the second separator, the positive electrode sheet, and the negative electrode sheet are thermally bonded and fixed.
  • the cell electrode assembly manufacturing equipment further includes: a device for pre-folding the first diaphragm and the second diaphragm at a position between two adjacent lamination units.
  • the pre-crease mechanism includes a plurality of crease members, and the plurality of crease members are alternately arranged on the side of the first diaphragm facing away from the second diaphragm and on the second diaphragm. The side of the diaphragm facing away from the first diaphragm.
  • the battery cell electrode assembly manufacturing equipment described in this application has the following advantages:
  • two diaphragms can be laminated at the same time, which shortens the manufacturing time of the battery cell electrode group, improves the manufacturing efficiency of the battery cell electrode group, and thereby improves the battery cell manufacturing efficiency .
  • FIG. 1 is a schematic diagram of using the cell electrode assembly manufacturing equipment according to an embodiment of the present application for lamination
  • FIG. 2 is a schematic diagram of the structure of multiple lamination units according to an embodiment of the application.
  • the lamination method may include installing the positive electrode sheet 231, the negative electrode sheet 232, the first separator 221, and the second separator 222 into a laminated unit 210, and folding and fabricating a plurality of laminated units 210
  • a battery cell pole group 200 is formed, in which the positive electrode sheet 231, the negative electrode sheet 232, the first diaphragm 221 and the second diaphragm 222 are assembled into the laminated unit 210, including: the first diaphragm 221 and the second diaphragm 222 are arranged oppositely , Insert the positive electrode sheets 231 one by one between the first separator 221 and the second separator 222, and arrange the negative electrode on the side of the first separator 221 away from the second separator 222 and the side of the second separator 222 away from the first separator 221.
  • the lamination method of the present application can simultaneously laminate two diaphragms, and simultaneously fold the lamination unit 210 at a time in the subsequent steps.
  • the multiple of each pole group shortens the manufacturing time of the cell pole group 200, The manufacturing efficiency of the battery cell pole group 200 is improved, thereby improving the manufacturing efficiency of the battery cell.
  • the positive electrode sheet 231, the negative electrode sheet 232, the first separator 221, and the second separator 222 are assembled into the laminated unit 210, which further includes: the first separator 221, the second separator 222, and the positive electrode sheet. 231.
  • the negative electrode plate 232 performs a fixing step. This can facilitate subsequent folding of the laminated unit 210 as a whole to form the cell pole group 200.
  • folding a plurality of lamination units 210 into a set of cell pole groups 200 includes: arranging a preset position between two adjacent lamination units 210 Crease 240 steps. Therefore, the subsequent two lamination units 210 can be laminated through the pre-fold 240 to form the cell pole group 200, and the manufacture of the cell pole group 200 is accurate and convenient.
  • folding a plurality of lamination units 210 into a set of battery cell pole groups 200 also includes: folding and clamping the plurality of lamination units 210 through a pre-fold 240 to form a set of battery cells. Steps of the core group 200 (for example, clamping by the clamping robot 6). Therefore, the space occupied by the cell pole group 200 can be reduced.
  • the clamping robot 6 can clamp multiple lamination units 210 to compress the multiple lamination units 210 close to each other, and fold them along the pre-fold 240, so that multiple lamination units 210 can be folded at a time. Improve stacking efficiency.
  • folding a plurality of lamination units 210 into a set of cell pole groups 200 further includes: arranging a first diaphragm 221 and a first diaphragm 221 between adjacent two sets of cell pole groups 200
  • the first diaphragm 221 and the second diaphragm 222 can be cut by a tool such as a blade to form a single set of battery cells.
  • folding a plurality of lamination units 210 into a set of cell pole groups 200 also includes the steps of performing diaphragm tail winding and glueing on the cut cell pole groups 200 . That is, the remaining first diaphragm 221 and the second diaphragm 222 that are cut on each group of cell pole groups 200 are wound around the outside of the group of cell pole groups 200, and each group of cell pole groups 200 are attached by gluing or the like.
  • the cut remaining first diaphragm 221 and second diaphragm 222 are fixed on the outside of the cell pole group 200, so that the cell pole group 200 occupies a small space, and the diaphragm wound on the outside of the cell pole group 200 can be The lamination unit 210 inside the battery cell pole group 200 is protected.
  • the cell electrode assembly manufacturing equipment 100 of the embodiment of the present application includes: a positive electrode plate conveying device for conveying a positive electrode plate 231 1, a first negative electrode plate conveying device for conveying a negative electrode plate 232 21 and the second negative electrode plate conveying device 22, the first diaphragm conveying device 31 for conveying the first diaphragm 221, the second diaphragm conveying device 32 for conveying the second diaphragm 222, the first diaphragm conveying device 31 and the second separator
  • the separator conveying device 32 is arranged oppositely, and the positive electrode plate conveying device 1 is sandwiched between the first separator conveying device 31 and the second separator conveying device 32, so that the positive electrode plate 231 can be inserted between the first separator 221 and the second separator 222.
  • first negative electrode plate conveying device 21 is located on the side of the first diaphragm conveying device 31 away from the second diaphragm conveying device 32
  • second negative electrode plate conveying device 22 is located on the second diaphragm conveying device 32 away from the first diaphragm conveying device 31.
  • the first negative electrode plate conveying device 21 and the second negative electrode plate conveying device 22 are used to stagger the side of the first diaphragm 221 away from the second diaphragm 222 and the side of the second diaphragm 222 away from the first diaphragm 221.
  • a negative plate 232 is provided on the side.
  • two diaphragms can be laminated at the same time, and the laminated unit 210 can be subsequently folded at a time.
  • the multiple of each pole group shortens the cell pole group 200
  • the manufacturing time is improved, and the manufacturing efficiency of the cell pole group 200 is improved, thereby improving the manufacturing efficiency of the cell.
  • the first diaphragm conveying device 31 and the second diaphragm conveying device 32 both include: a diaphragm unwinding drum 30 for winding and unwinding a diaphragm
  • the positive electrode plate conveying device 1 includes: a positive plate material unwinding The drum 11 and the positive electrode plate cutting piece, the positive electrode plate cutting piece (such as a blade) is used to cut the positive electrode plate discharged from the positive electrode plate into the first separator 221 and the second separator 222 before cutting into
  • Each of the positive electrode sheet 231, the first negative electrode plate conveying device 21 and the second negative electrode plate conveying device 22 includes: a negative plate material unwinding drum 20 and a negative electrode plate cutting piece (such as a blade), and a negative electrode plate The cutting piece is used to cut the negative electrode sheet discharged from the negative electrode sheet into a negative electrode sheet 232. Therefore, there is no need to arrange mechanical claws to clamp and transport the positive electrode sheet 231 or the negative electrode sheet 232, and the
  • the cell electrode assembly manufacturing equipment 100 further includes: a thermal cladding mechanism 4, the thermal cladding mechanism 4 includes: two pressing rollers 41 and a heating part, the two pressing rollers 41 are suitable for jointly The first separator 221, the second separator 222, the positive electrode sheet 231, and the negative electrode sheet 232 are compressed, and the heating part is adapted to heat the first separator 221 and the second separator 222, so that the surface of the first separator 221 and the second separator 222 increases in viscosity. Large, to thermally bond and fix the first separator 221, the second separator 222, the positive electrode sheet 231, and the negative electrode sheet 232. In this way, it can be ensured that the various components of the laminated monomer are firmly connected.
  • the heating part may be an electric heating wire, and the electric heating wire may be wound or fixed on at least one pressing roller 41.
  • the cell electrode group manufacturing equipment 100 further includes: a first diaphragm 221 and a second diaphragm 222 for setting a pre-crease at a position between two adjacent laminated units 210 240 pre-crease mechanism 5,
  • the pre-crease mechanism 5 includes a plurality of crease members 51, the plurality of crease members 51 are alternately arranged on the side of the first diaphragm 221 away from the second diaphragm 222 and on the second diaphragm 222 away from the first One side of the diaphragm 221. In this way, the force on both sides of the first diaphragm 221 and the second diaphragm 222 during the pre-folding 240 can be uniform.
  • the crease member 51 may be a cylindrical steel body (for example, an iron block) without a pointed end.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

一种用于电芯制造的叠片方法和电芯极组制造装备(100)，叠片方法包括将第一隔膜(221)和第二隔膜(222)相对设置，将正极片(231)逐个插入第一隔膜(221)和第二隔膜(222)之间，并交错在第一隔膜(221)背离第二隔膜(222)的一侧以及在第二隔膜(222)背离第一隔膜(221)的一侧设置负极片(232)。

Description

用于电芯制造的叠片方法和电芯极组制造装备
相关申请的交叉引用
本申请要求“蜂巢能源科技有限公司”于2019年06月28日提交的、名称为“用于电芯制造的叠片方法和电芯极组制造装备”的、中国专利申请号“201910578756.7”的优先权。
技术领域
本申请涉及车辆制造领域，具体而言，涉及一种用于电芯制造的叠片方法和电芯极组制造装备。
背景技术
相关技术中，随着新能源汽车等新能源机械的发展，电池的应用越来越广泛。在锂电池等电池领域中，在制造电芯的极组时，通常采用z形叠片技术，即在叠片时，先叠负极片，再在负极片包覆隔膜，再叠正极片，再在正极包裹隔膜。该叠片方式的叠片单元为单张极片或单张隔膜，使用该叠片方法速度较慢，导致电芯制造效率低下。
申请内容
有鉴于此，本申请旨在提出一种至少能在一定程度上能提高电芯极组制造效率的叠片方法。
为达到上述目的，本申请的技术方案是这样实现的：
一种叠片方法，包括将正极片、负极片、第一隔膜和第二隔膜安装成叠片单元，并将多个所述叠片单元折叠并制成一组电芯极组，其中，所述将正极片、负极片、第一隔膜和第二隔膜安装成叠片单元，包括：将第一隔膜和第二隔膜相对设置，将正极片逐个插入所述第一隔膜和所述第二隔膜之间，并交错在所述第一隔膜背离所述第二隔膜的一侧以及在所述第二隔膜背离所述第一隔膜的一侧设置负极片。
在本申请的一些示例中，所述将正极片、负极片、第一隔膜和第二隔膜安装成叠片单元，还包括：将所述第一隔膜、所述第二隔膜、所述正极片、所述负极片进行固定的步骤。
在本申请的一些示例中，所述将多个所述叠片单元折叠并制成一组电芯极组，包括：将相邻的两个所述叠片单元之间的位置处设置预折痕的步骤。
在本申请的一些示例中，所述将多个所述叠片单元折叠并制成一组电芯极组，还包括：将多个所述叠片单元通过所述预折痕折叠并夹紧成一组电芯极组的步骤。
在本申请的一些示例中，所述将多个所述叠片单元折叠并制成一组电芯极组，还包括：将相邻的两组所述电芯极组之间的所述第一隔膜和所述第二隔膜进行裁断的步骤。
在本申请的一些示例中，所述将多个所述叠片单元折叠并制成一组电芯极组，还包括：将裁断后的所述电芯极组进行隔膜尾卷和贴胶固定的步骤。
相对于现有技术，本申请所述的叠片方法具有以下优势：
1)根据本申请的叠片方法，可以同时对两个隔膜进行叠片，缩短了电芯极组的制造时间，提升了电芯极组的制造效率，从而提高了电芯制造效率。
本申请的另一目的在于提出一种电芯极组制造装备，包括：正极极板输送装置、第一负极极板输送装置、第二负极极板输送装置、第一隔膜输送装置、第二隔膜输送装置，所述第一隔膜输送装置和所述第二隔膜输送装置相对设置，所述正极极板输送装置夹设在所述第一隔膜输送装置与所述第二隔膜输送装置之间，所述第一负极极板输送装置位于所述第一隔膜输送装置背离所述第二隔膜输送装置的一侧，所述第二负极极板输送装置位于所述第二隔膜输送装置背离所述第一隔膜输送装置的一侧，所述第一负极极板输送装置和所述第二负极极板输送装置用于交错在所述第一隔膜背离所述第二隔膜的一侧以及在所述第二隔膜背离所述第一隔膜的一侧设置负极片。
在本申请的一些示例中，所述第一隔膜输送装置和所述第二隔膜输送装置均包括：隔膜 放卷滚筒，所述正极极板输送装置包括：正极板料放卷滚筒和正极板料裁切件，所述正极板料裁切件用于将所述正极板料放卷滚放出的正极板料进入所述第一隔膜与所述第二隔膜之间前裁切成所述正极片，所述第一负极极板输送装置和所述第二负极极板输送装置中的每一个均包括：负极板料放卷滚筒和负极板料裁切件，所述负极板料裁切件用于将所述负极板料放卷滚放出的负极板料裁切成所述负极片。
在本申请的一些示例中，所述电芯极组制造装备还包括：热覆合机构，所述热覆合机构包括：两个压辊和加热部，所述两个压辊适于共同将所述第一隔膜、所述第二隔膜、所述正极片、所述负极片压紧，所述加热部适于对所述第一隔膜和所述第二隔膜加热，以将所述第一隔膜、所述第二隔膜、所述正极片、所述负极片热粘接固定。
在本申请的一些示例中，所述电芯极组制造装备还包括：用于对所述第一隔膜和所述第二隔膜在相邻的两个叠片单元之间的位置处设置预折痕的预折痕机构，所述预折痕机构包括多个折痕件，多个所述折痕件交错设置在所述第一隔膜背离所述第二隔膜的一侧以及在所述第二隔膜背离所述第一隔膜的一侧。
相对于现有技术，本申请所述的电芯极组制造装备具有以下优势：
1)根据本申请的电芯极组制造装备，可以同时对两个隔膜进行叠片，缩短了电芯极组的制造时间，提升了电芯极组的制造效率，从而提高了电芯制造效率。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
图1为利用本申请实施例所述的电芯极组制造装备进行叠片的示意图；
图2为本申请实施例所述的多个叠片单元的结构示意图。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
下面将参考附图并结合实施例来详细说明本申请。
下面参考图1-图2并结合实施例描述本申请实施例的叠片方法。
如图1-图2所示，叠片方法可以包括将正极片231、负极片232、第一隔膜221和第二隔膜222安装成叠片单元210，并将多个叠片单元210折叠并制成一组电芯极组200，其中，将正极片231、负极片232、第一隔膜221和第二隔膜222安装成叠片单元210，包括：将第一隔膜221和第二隔膜222相对设置，将正极片231逐个插入第一隔膜221和第二隔膜222之间，并交错在第一隔膜221背离第二隔膜222的一侧以及在第二隔膜222背离第一隔膜221的一侧设置负极片232，即在第一隔膜221背离第二隔膜222的一侧设置与一个正极片231相对的负极片232之后，在与其相邻的正极片231处，在第二隔膜222背离第一隔膜221的一侧设置负极片232。由此，本申请的叠片方法，可以同时对两个隔膜进行叠片，同时后续可以一次对叠片单元210进行折叠，每个极组的多个缩短了电芯极组200的制造时间，提升了电芯极组200的制造效率，从而提高了电芯制造效率。
具体地，如图1所示，将正极片231、负极片232、第一隔膜221和第二隔膜222安装成叠片单元210，还包括：将第一隔膜221、第二隔膜222、正极片231、负极片232进行固定的步骤。由此可以便于后续将叠片单元210作为整体折叠形成电芯极组200。
具体地，如图1-图2所示，将多个叠片单元210折叠并制成一组电芯极组200，包括：将相邻的两个叠片单元210之间的位置处设置预折痕240的步骤。由此，后续两个叠片单元210可以通过预折痕240进行叠片制成电芯极组200，电芯极组200的制造精确方便。
具体地，如图1所示，将多个叠片单元210折叠并制成一组电芯极组200，还包括：将多个叠片单元210通过预折痕240折叠并夹紧成一组电芯极组200的步骤(例如通过夹持机械手6夹紧)。由此可以使电芯极组200占用空间小。
例如夹持机械手6可以通过夹持多个叠片单元210，使多个叠片单元210彼此靠近压缩，并沿着预折痕240发生折叠，从而可以一次对多个叠片单元210进行折叠，提高叠片效率。
具体地，如图1所示，将多个叠片单元210折叠并制成一组电芯极组200，还包括：将相邻的两组电芯极组200之间的第一隔膜221和第二隔膜222进行裁断的步骤，例如可以通过刀片等工具将第一隔膜221和第二隔膜222进行裁断，以形成单独的一组电芯机组。
具体地，如图1所示，将多个叠片单元210折叠并制成一组电芯极组200，还包括：将裁断后的电芯极组200进行隔膜尾卷和贴胶固定的步骤。即每组电芯极组200上被裁切的剩余的第一隔膜221和第二隔膜222缠绕在该组电芯极组200外侧，并通过胶粘等方式将每组电芯极组200上被裁切的剩余的第一隔膜221和第二隔膜222固定在该组电芯极组200外侧，使电芯极组200占用空间小，且缠绕在该组电芯极组200外侧的隔膜可以对该组电芯极组200内部的叠片单元210进行保护。
下面描述本申请实施例的电芯极组制造装备100。
如图1所示，本申请实施例的电芯极组制造装备100包括：用于输送正极极板231的正极极板输送装置1、用于输送负极极板232的第一负极极板输送装置21和第二负极极板输送装置22、用于输送第一隔膜221的第一隔膜输送装置31、用于输送第二隔膜222的第二隔膜输送装置32，第一隔膜输送装置31和第二隔膜输送装置32相对设置，正极极板输送装置1夹设在第一隔膜输送装置31与第二隔膜输送装置32之间，以便于将正极极板231插入第一隔膜221和第二隔膜222之间，第一负极极板输送装置21位于第一隔膜输送装置31背离第二隔膜输送装置32的一侧，第二负极极板输送装置22位于第二隔膜输送装置32背离第一隔膜输送装置31的一侧，第一负极极板输送装置21和第二负极极板输送装置22用于交错在第一隔膜221背离第二隔膜222的一侧以及在第二隔膜222背离第一隔膜221的一侧设置负极片232。
根据本申请实施例的电芯极组制造装备100，可以同时对两个隔膜进行叠片，同时后续可以一次对叠片单元210进行折叠，每个极组的多个缩短了电芯极组200的制造时间，提升了电芯极组200的制造效率，从而提高了电芯制造效率。
具体地，如图1所示，第一隔膜输送装置31和第二隔膜输送装置32均包括：用于卷放隔膜的隔膜放卷滚筒30，正极极板输送装置1包括：正极板料放卷滚筒11和正极板料裁切件，正极板料裁切件(例如刀片)用于将正极板料放卷滚放出的正极板料进入第一隔膜221与第二隔膜222之间前裁切成正极片231，第一负极极板输送装置21和第二负极极板输送装置22中的每一个均包括：负极板料放卷滚筒20和负极板料裁切件(例如刀片)，负极板料裁切件用于将负极板料放卷滚放出的负极板料裁切成负极片232。由此无需布置机械爪夹持运输正极片231或负极片232，即可实现叠片单元210的安装，节约了电芯极组制造装备100的占用空间，同时降低了制造成本。
具体地，如图1所示，电芯极组制造装备100还包括：热覆合机构4，热覆合机构4包括：两个压辊41和加热部，两个压辊41适于共同将第一隔膜221、第二隔膜222、正极片231、负极片232压紧，加热部适于对第一隔膜221和第二隔膜222加热，使第一隔膜221和第二隔膜222表面受热粘性增大，以将第一隔膜221、第二隔膜222、正极片231、负极片232热粘接固定。由此可以保证叠片单体各个部件之间连接牢固，具体地，加热部可以为电加热丝，电加热丝可以缠绕或固定在至少一个压辊41上。
具体地，如图1所示，电芯极组制造装备100还包括：用于对第一隔膜221和第二隔膜222在相邻的两个叠片单元210之间的位置处设置预折痕240的预折痕机构5，预折痕机构5包括多个折痕件51，多个折痕件51交错设置在第一隔膜221背离第二隔膜222的一侧以及在第二隔膜222背离第一隔膜221的一侧。由此可以使第一隔膜221和第二隔膜222在预折痕240时两侧受力均匀。折痕件51可以未具有尖端的柱形钢体(例如铁块)。
以上仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种用于电芯制造的叠片方法，其特征在于，包括：将正极片、负极片、第一隔膜和第二隔膜安装成叠片单元，并将多个所述叠片单元折叠并制成一组电芯极组；
    其中，所述将正极片、负极片、第一隔膜和第二隔膜安装成叠片单元，包括：将第一隔膜和第二隔膜相对设置，将正极片逐个插入所述第一隔膜和所述第二隔膜之间，并交错在所述第一隔膜背离所述第二隔膜的一侧以及在所述第二隔膜背离所述第一隔膜的一侧设置负极片。
  2. 根据权利要求1所述的用于电芯制造的叠片方法，其特征在于，所述将正极片、负极片、第一隔膜和第二隔膜安装成叠片单元，还包括：将所述第一隔膜、所述第二隔膜、所述正极片、所述负极片进行固定的步骤。
  3. 根据权利要求1或2所述的用于电芯制造的叠片方法，其特征在于，所述将多个所述叠片单元折叠并制成一组电芯极组，包括：将相邻的两个所述叠片单元之间的位置处设置预折痕的步骤。
  4. 根据权利要求3所述的用于电芯制造的叠片方法，其特征在于，所述将多个所述叠片单元折叠并制成一组电芯极组，还包括：将多个所述叠片单元通过所述预折痕折叠并夹紧成一组电芯极组的步骤。
  5. 根据权利要求4所述的用于电芯制造的叠片方法，其特征在于，所述将多个所述叠片单元折叠并制成一组电芯极组，还包括：将相邻的两组所述电芯极组之间的所述第一隔膜和所述第二隔膜进行裁断的步骤。
  6. 根据权利要求5所述的用于电芯制造的叠片方法，其特征在于，所述将多个所述叠片单元折叠并制成一组电芯极组，还包括：将裁断后的所述电芯极组进行隔膜尾卷和贴胶固定的步骤。
  7. 一种电芯极组制造装备，其特征在于，包括：正极极板输送装置、第一负极极板输送装置、第二负极极板输送装置、第一隔膜输送装置、第二隔膜输送装置，所述第一隔膜输送装置和所述第二隔膜输送装置相对设置，所述正极极板输送装置夹设在所述第一隔膜输送装置与所述第二隔膜输送装置之间，所述第一负极极板输送装置位于所述第一隔膜输送装置背离所述第二隔膜输送装置的一侧，所述第二负极极板输送装置位于所述第二隔膜输送装置背离所述第一隔膜输送装置的一侧，所述第一负极极板输送装置和所述第二负极极板输送装置用于交错在所述第一隔膜背离所述第二隔膜的一侧以及在所述第二隔膜背离所述第一隔膜的一侧设置负极片。
  8. 根据权利要求7所述的电芯极组制造装备，其特征在于，所述第一隔膜输送装置和所述第二隔膜输送装置均包括：隔膜放卷滚筒，所述正极极板输送装置包括：正极板料放卷滚筒和正极板料裁切件，所述正极板料裁切件用于将所述正极板料放卷滚放出的正极板料进入所述第一隔膜与所述第二隔膜之间前裁切成所述正极片，所述第一负极极板输送装置和所述第二负极极板输送装置中的每一个均包括：负极板料放卷滚筒和负极板料裁切件，所述负极板料裁切件用于将所述负极板料放卷滚放出的负极板料裁切成所述负极片。
  9. 根据权利要求7或8所述的电芯极组制造装备，其特征在于，还包括：热覆合机构，所述热覆合机构包括：两个压辊和加热部，所述两个压辊适于共同将所述第一隔膜、所述第二隔膜、所述正极片、所述负极片压紧，所述加热部适于对所述第一隔膜和所述第二隔膜加热，以将所述第一隔膜、所述第二隔膜、所述正极片、所述负极片热粘接固定。
  10. 根据权利要求7-9中任一项所述的电芯极组制造装备，其特征在于，还包括：用于对所述第一隔膜和所述第二隔膜在相邻的两个叠片单元之间的位置处设置预折痕的预折痕机构，所述预折痕机构包括多个折痕件，多个所述折痕件交错设置在所述第一 隔膜背离所述第二隔膜的一侧以及在所述第二隔膜背离所述第一隔膜的一侧。
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