WO2023116405A1 - 电极组件的制造设备以及制造方法 - Google Patents
电极组件的制造设备以及制造方法 Download PDFInfo
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- WO2023116405A1 WO2023116405A1 PCT/CN2022/136592 CN2022136592W WO2023116405A1 WO 2023116405 A1 WO2023116405 A1 WO 2023116405A1 CN 2022136592 W CN2022136592 W CN 2022136592W WO 2023116405 A1 WO2023116405 A1 WO 2023116405A1
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- WIPO (PCT)
- Prior art keywords
- pole piece
- diaphragm
- winding
- composite
- electrode assembly
- Prior art date
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
- B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1825—Handling of layers or the laminate characterised by the control or constructional features of devices for tensioning, stretching or registration
- B32B38/1833—Positioning, e.g. registration or centering
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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
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/18—Handling of layers or the laminate
- B32B38/1875—Tensioning
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0404—Machines for assembling batteries
- H01M10/0409—Machines for assembling batteries for cells with wound electrodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/46—Separators, membranes or diaphragms characterised by their combination with electrodes
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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
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- H01M6/005—Devices for making primary cells
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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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/70—Automated, e.g. using a computer or microcomputer
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- 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
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- 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 battery production, in particular to a manufacturing equipment and a manufacturing method of an electrode assembly.
- the battery cell has the advantages of high specific energy and high power density. As the main energy source in the field of new energy, it plays a very important and decisive role in the development of the field of new energy. As the constituent unit of the battery cell, the electrode assembly has an important influence on the performance of the battery cell.
- the present application provides a manufacturing device and a manufacturing method of an electrode assembly, aiming at improving the production efficiency and yield of the electrode assembly.
- the present application proposes an electrode assembly manufacturing equipment, including: a first pole piece feeding mechanism, used to transport the first pole piece; a first diaphragm feeding mechanism, used to transport the first diaphragm; a second diaphragm feeding mechanism
- the mechanism is used to transport the second diaphragm;
- the composite mechanism is arranged downstream of the first pole piece feeding mechanism, the first diaphragm feeding mechanism and the second diaphragm feeding mechanism, and the composite mechanism is used to combine the first diaphragm, the first pole piece and the second diaphragm
- the two diaphragms are stacked in sequence to form the first pole piece complex;
- the second pole piece feeding mechanism is used to transport the second pole piece, and the polarity of the second pole piece is opposite to that of the first pole piece;
- the winding mechanism is arranged in the composite Downstream of the mechanism and the second pole piece feeding mechanism, it is used to wind the first pole piece composite and the second pole piece to form an electrode assembly.
- the first pole piece complex is formed by pre-combining the first pole piece, the first diaphragm and the second diaphragm, and the first pole piece is respectively covered by the first diaphragm and the second diaphragm on both sides in the thickness direction.
- the first pole piece is not easy to be warped, folded or wrinkled during the transportation process, and the first pole piece is not easy to peel off from the first diaphragm and the second diaphragm, and no additional gluing equipment is required for the first
- the pole piece is fixed, and the first pole piece complex and the second pole piece enter the winding mechanism for winding, which can reduce the possibility of folding or wrinkling the first pole piece and the second pole piece, and can improve the yield rate of the electrode assembly.
- the first pole piece, the first diaphragm and the second diaphragm are pre-aligned and composited into one, the first pole piece complex and the second pole piece are transported to the winding mechanism for winding, which effectively reduces the number of sheets entering the winding mechanism
- the total quantity is conducive to reducing the difficulty of alignment of the first pole piece, the first diaphragm, the second diaphragm and the second pole piece, especially to improving the alignment accuracy of the first pole piece and the second pole piece, and further improving the electrode assembly. Yield rate.
- the first pole piece enters the winding mechanism driven by the first diaphragm and the second diaphragm, and there is no need to set up a winding auxiliary mechanism to guide the first pole piece into the winding, thereby simplifying the equipment structure and saving the cost of the first pole piece Cutting and feeding time can reduce the production cycle of the electrode assembly and help improve the production efficiency of winding.
- the winding mechanism includes a rolling needle and a first pole piece rolling guide roller set, the first pole piece rolling guide roller set is arranged upstream of the winding needle, and the first pole piece rolling guide roller set is used for The first pole piece assembly is conveyed to the winding needle.
- the first pole piece complex only needs to enter the winding needle driven by the first pole piece winding guide roller group, and there is no need to set up an auxiliary winding mechanism, which is conducive to simplifying the complexity of the manufacturing equipment and improving the Production efficiency of electrode assemblies.
- the manufacturing equipment further includes a feeding guide mechanism, the feeding guide mechanism is arranged between the second pole piece feeding mechanism and the winding mechanism, and the feeding guide mechanism is used to transport the second pole piece to the winding needle, so that the second pole piece A pole piece composite is wrapped around the second pole piece.
- the feeding guide mechanism can assist the winding of the second pole piece and improve the alignment accuracy of the first pole piece complex and the second pole piece, especially the alignment along the length direction of the first pole piece complex .
- the winding mechanism further includes a rotating base and at least two winding needles, the at least two winding needles surround the rotation axis of the rotating base and are arranged at intervals on the rotating base.
- multiple rolling needles are provided to facilitate the continuous production of the electrode assembly.
- the manufacturing equipment further includes a first cutting mechanism, the first cutting mechanism is located between at least two winding needles, and is used to cut off the first pole piece composite; and/or the manufacturing equipment further includes a second cutting mechanism , the second cutting mechanism is located between the second pole piece feeding mechanism and the winding mechanism, and is used to cut off the second pole piece.
- the first cutting mechanism is located below the winding station, and the debris generated by the first cutting mechanism will basically not fall to the winding station, which reduces the adverse effect of dust on the inside of the electrode assembly, thereby The safety performance of the electrode assembly can be guaranteed.
- the second cutting mechanism is arranged upstream of the winding mechanism, which is conducive to the smooth progress of the cutting operation, and the second cutting mechanism is far away from the winding mechanism, which can effectively reduce the possibility of dust generated during the cutting process and improve the safety of the electrode assembly. safety performance.
- the manufacturing equipment further includes a first detection mechanism, the first detection mechanism is located between the composite mechanism and the winding mechanism, and the first detection mechanism is used to detect the first pole piece, the first diaphragm and the second diaphragm.
- Composite alignment The first detection mechanism can detect in real time the alignment of the first pole piece, the first diaphragm and the second diaphragm after they are combined.
- the first pole piece complex can be transported to the winding mechanism for winding, which is beneficial to ensure the winding
- the manufacturing equipment further includes a first deviation correction mechanism and a second deviation correction mechanism, the first deviation correction mechanism is located between the composite mechanism and the winding mechanism, and the first deviation correction mechanism is used to adjust the first pole piece composite and the second
- the relative position of the pole piece the second deviation correction mechanism is located between the second pole piece feeding mechanism and the winding mechanism, and the second deviation correction mechanism is used to adjust the relative position of the first pole piece composite and the second pole piece.
- the first deviation correction mechanism and the second deviation correction mechanism can adjust the relative position between the first pole piece complex and the second pole piece, so that the first pole piece complex and the second pole piece are aligned with each other , the alignment between the two meets product requirements, which is beneficial to improving the yield rate of the electrode assembly.
- the manufacturing equipment further includes a third deviation correction mechanism, a fourth deviation correction mechanism, and a fifth deviation correction mechanism; the third deviation correction mechanism is located between the first pole piece feeding mechanism and the composite mechanism, and the third deviation correction mechanism is used to adjust the The relative position between a pole piece, the first diaphragm and the second diaphragm; the fourth deviation correction mechanism is located between the first diaphragm feeding mechanism and the composite mechanism, and the fourth deviation correction mechanism is used to adjust the first pole piece, the first diaphragm and the second deviation correction mechanism The relative position between the two diaphragms; the fifth deviation correcting mechanism is located between the second diaphragm feeding mechanism and the composite mechanism, and the fifth deviation correcting mechanism is used to adjust the relative position between the first pole piece, the first diaphragm and the second diaphragm.
- the third deviation correction mechanism, the fourth deviation correction mechanism and the fifth deviation correction mechanism can adjust the relative positions of the first pole piece, the first diaphragm and the second diaphragm, so that the three are aligned with each other.
- the manufacturing equipment further includes a first tension mechanism, a second tension mechanism and a third tension mechanism; the first tension mechanism is arranged between the composite mechanism and the winding mechanism, and the first tension mechanism is used to adjust the first pole The tension degree of the sheet composite; the second tension mechanism is arranged between the second pole piece feeding mechanism and the winding mechanism, and the second tension mechanism is used to adjust the tension degree of the second pole piece; the third tension mechanism is arranged on the second pole piece Between the first pole piece feeding mechanism and the composite mechanism, the third tension mechanism is used to adjust the tension degree of the first pole piece.
- the first tension mechanism is used to adjust the tension degree of the first pole piece composite, so as to reduce the risk of wrinkling of the first pole piece composite.
- the second tension mechanism is arranged between the second pole piece feeding mechanism and the winding mechanism, and the second tension mechanism is used to adjust the tension degree of the second pole piece to reduce the risk of wrinkling of the second pole piece.
- the third tension mechanism is used to adjust the tension degree of the first pole piece, so as to reduce the risk of wrinkling of the first pole piece and improve the yield rate of the electrode assembly.
- the manufacturing equipment further includes a first roll changing mechanism arranged between the first pole piece feeding mechanism and the composite mechanism, and the two first pole piece feeding mechanisms are respectively It is arranged on both sides of the first roll changing mechanism; and/or there are two second pole piece feeding mechanisms, and the manufacturing equipment also includes a second roll changing mechanism arranged between the second pole piece feeding mechanism and the winding mechanism, The two second pole piece feeding mechanisms are respectively arranged on both sides of the second coil changing mechanism.
- the rolls are changed in time by the first roll changing mechanism and the second roll changing mechanism, which is beneficial to improve production efficiency.
- the embodiment of the present application also provides a method for manufacturing an electrode assembly, including: providing a first diaphragm, a first pole piece, and a second diaphragm; sequentially stacking the first diaphragm, the first pole piece, and the second diaphragm Composite into a first pole piece composite; provide a second pole piece; wind the first pole piece composite and the second pole piece together to form an electrode assembly, wherein the first pole piece and the second pole piece pass through the first diaphragm and Second diaphragm isolation setting.
- the method further includes: after transporting the second pole piece and the first pole piece composite to the winding station and winding, cutting the second pole piece and the first pole piece composite.
- Fig. 1 is an exploded schematic diagram of a battery cell provided by some embodiments of the present application.
- Fig. 2 is a schematic structural diagram of an electrode assembly provided by some embodiments of the present application.
- Fig. 3 is a schematic structural view of the manufacturing equipment of the electrode assembly provided by some embodiments of the present application.
- Fig. 4 is a schematic flowchart of a method for manufacturing an electrode assembly provided by some embodiments of the present application.
- Fig. 5 is a schematic flowchart of a method for manufacturing an electrode assembly provided by another embodiment of the present application.
- Electrode assembly 12a, main body; 12b, tab; 121, first pole piece; 122, second pole piece; 123, first diaphragm; Two diaphragms; 125, the first pole piece complex; 13, the end cap assembly;
- the first pole piece feeding mechanism
- connection should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary.
- connection should be interpreted in a broad sense, for example, it can be a fixed connection or a flexible connection. Disassembled connection, or integral connection; it can be directly connected or indirectly connected through an intermediary.
- the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a lithium sodium ion battery cell, a sodium ion battery cell or a magnesium ion battery cell, etc.
- the embodiment of the present application does not limit this.
- the battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application.
- Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.
- the battery cell includes an electrode assembly, which is the core component for charging and discharging the battery cell.
- the battery cell includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive pole piece, a negative pole piece and a separator.
- a battery cell works primarily by moving metal ions between the positive and negative pole pieces.
- the positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode current collector and a positive electrode lug protruding from the positive electrode current collector. part is coated with a positive electrode active material layer, and at least part of the positive electrode tab is not coated with a positive electrode active material layer.
- the material of the positive electrode current collector can be aluminum, the positive electrode active material layer includes the positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate.
- the negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collector and a negative electrode tab protruding from the negative electrode current collector, and the negative electrode current collector part is coated with a negative electrode active material layer, and at least part of the negative electrode tab is not coated with a negative electrode active material layer.
- the material of the negative electrode current collector may be copper, the negative electrode active material layer includes the negative electrode active material, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current is passed without fusing, the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together.
- the material of the spacer can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene).
- the inventors have found that when preparing the electrode assembly, the positive pole piece, the separator and the negative pole piece are respectively input into the winding mechanism for winding, and the positive pole piece, the separator and the negative pole piece are stacked in sequence and wound more than two times. An electrode assembly is formed.
- the preparation process it is necessary to separately assist the winding of the positive pole piece, separator and negative pole piece, and its production efficiency is low.
- the number of sheets to be rolled is large, and it is difficult to control the alignment. Misalignment between the positive electrode sheet and the negative electrode sheet is prone to occur, resulting in a low yield rate of the electrode assembly.
- the inventor has improved the equipment for manufacturing the electrode assembly, and the embodiments of the present application will be further described below.
- Fig. 1 is an exploded schematic diagram of a battery cell provided by some embodiments of the present application.
- Fig. 2 is a schematic structural view of an electrode assembly provided by some embodiments of the present application.
- the battery cell 10 of the embodiment of the present application includes a casing 11 , an electrode assembly 12 disposed in the casing 11 , and an end cap assembly 13 sealingly connected with the casing 11 .
- the casing 11 has a square structure, a cylindrical structure or other shapes, and the shape of the casing 11 is determined according to the shape of the electrode assembly 12 .
- the casing 11 has an inner space for accommodating the electrode assembly 12 and electrolyte, and an opening communicating with the inner space.
- the casing 11 can be made of materials such as aluminum, aluminum alloy or plastic.
- the electrode assembly 12 includes a first pole piece 121 , a second pole piece 122 , a first diaphragm 123 and a second diaphragm 124 .
- the polarities of the first pole piece 121 and the second pole piece 122 are opposite.
- the first pole piece 121 is a positive pole piece, and correspondingly, the second pole piece 122 is a negative pole piece; or the first pole piece 121 is The negative pole piece, correspondingly, the second pole piece 122 is a positive pole piece.
- the first pole piece 121 may be a negative pole piece, and the size specification (eg length, width) of the negative pole piece is larger than that of the positive pole piece.
- the first diaphragm 123 and the second diaphragm 124 constitute a separator, and the first diaphragm 123 and the second diaphragm 124 are insulators interposed between the first pole piece 121 and the second pole piece 122 .
- the first pole piece 121, the first diaphragm 123 and the second diaphragm 124 are pre-combined into the first pole piece complex 125, and then when the first pole piece complex 125 and the second pole piece 122 are combined, the difficulty of controlling the alignment can be reduced , to improve the alignment of the compound.
- the electrode assembly 12 includes a main body part 12 a and a tab part 12 b connected to the main body part 12 a.
- the whole body part 12a is a flat structure with predetermined thickness, height and width.
- the electrode assembly 12 can be wound into a hollow cylindrical structure first, and then flattened into a flat shape after winding. Of course, the electrode assembly 12 can also be directly wound into a flat structure.
- Electric devices can be vehicles, mobile phones, portable devices, notebook computers, ships, spacecraft, electric toys and electric tools, and so on.
- Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles;
- spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.;
- electric toys include fixed Type or mobile electric toys, such as game consoles, electric car toys, electric boat toys and electric airplane toys, etc.;
- electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, for example, Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, electric planers, and more.
- the embodiments of the present application do not impose special limitations on the above-mentioned electrical devices.
- Fig. 3 is a schematic structural diagram of an electrode assembly manufacturing equipment provided by some embodiments of the present application.
- an embodiment of the present application provides a manufacturing equipment for an electrode assembly.
- the manufacturing equipment 100 includes a first pole piece feeding mechanism 101 , a first diaphragm feeding mechanism 102 , a second diaphragm feeding mechanism 103 , a composite mechanism 104 , a second pole piece feeding mechanism 105 and a winding mechanism 106 .
- the first pole piece feeding mechanism 101 is used to transport the first pole piece 121 .
- the first membrane feeding mechanism 102 is used to deliver the first membrane 123 .
- the second membrane feeding mechanism 103 is used to deliver the second membrane 124 .
- the recombination mechanism 104 is arranged on the downstream of the first pole piece feeding mechanism 101, the first diaphragm feeding mechanism 102 and the second diaphragm feeding mechanism 103, and the recombination mechanism 104 is used for the first diaphragm 123, the first pole piece 121 and the second diaphragm 124
- the first pole piece complex 125 is formed by stacking and compounding in sequence.
- the second pole piece feeding mechanism 105 is used to transport the second pole piece 122 , and the polarity of the second pole piece 122 is opposite to that of the first pole piece 121 .
- the winding mechanism 106 is disposed downstream of the composite mechanism 104 and the second pole piece feeding mechanism 105 , and is used for winding the first pole piece composite 125 and the second pole piece 122 to form the electrode assembly 12 .
- the first pole piece feeding mechanism 101 is used to install and fix the material roll of the first pole piece 121 , and can transport the first pole piece 121 through the unwinding mechanism.
- the first pole piece 121 moves toward the composite mechanism 104 driven by the conveying roller set.
- the first diaphragm feeding mechanism 102 is used to install and fix the material roll of the first diaphragm 123 , and can transport the first diaphragm 123 through the unwinding mechanism.
- the first diaphragm 123 moves toward the composite mechanism 104 driven by the conveying roller set.
- the second diaphragm feeding mechanism 103 is used to install and fix the material roll of the second diaphragm 124 , and can transport the second diaphragm 124 through the unwinding mechanism.
- the second diaphragm 124 moves toward the composite mechanism 104 driven by the conveying roller set.
- the first pole piece 121, the first diaphragm 123 and the second diaphragm 124 are all transported to the composite mechanism 104, and the first diaphragm 123, the first pole piece 121 and the second diaphragm 124 are stacked sequentially along the thickness direction of the first pole piece 121 It is provided that the composite mechanism 104 composites the first diaphragm 123 , the first pole piece 121 and the second diaphragm 124 into a first pole piece composite 125 .
- Composite methods include hot pressing, electrostatic adsorption, bonding or plasma adsorption.
- the compounding mechanism 104 includes a heat-pressing mechanism, and the first diaphragm 123 , the first pole piece 121 and the second diaphragm 124 realize heat-pressing compounding through the heat-pressing mechanism.
- the recombination mechanism 104 includes an electrostatic generator, and the first diaphragm 123 , the first pole piece 121 and the second diaphragm 124 realize recombination connection through electrostatic adsorption.
- the compound mechanism 104 includes a glue-applying mechanism, and the first diaphragm 123 , the first pole piece 121 and the second diaphragm 124 are bonded to realize compound connection.
- the recombination mechanism 104 includes a plasma adsorption device, and the first diaphragm 123 , the first pole piece 121 and the second diaphragm 124 realize recombination connection through plasma adsorption.
- the second pole piece feeding mechanism 105 is used to install and fix the material roll of the second pole piece 122 , and can transport the second pole piece 122 through the unwinding mechanism.
- the second pole piece 122 moves toward the winding mechanism 106 driven by the conveying roller set.
- the winding mechanism 106 is arranged downstream of the composite mechanism 104 and the second pole piece feeding mechanism 105, and the first pole piece composite 125 and the second pole piece 122 are respectively transported to the winding mechanism 106 to be wound and composited into an electrode assembly 12 .
- the first pole piece composite 125 is formed by pre-combining the first pole piece 121, the first diaphragm 123 and the second diaphragm 124, and the first pole piece 121 is respectively covered by the first Covered by the diaphragm 123 and the second diaphragm 124, the first pole piece 121 is not easy to warp, fold or wrinkle during the transportation process, and the first pole piece 121 is not easy to peel off from the first diaphragm 123 and the second diaphragm 124 , there is no need to set up additional gluing equipment to fix the first pole piece 121, the first pole piece complex 125 and the second pole piece 122 enter the winding mechanism 106 for winding, and the first pole piece 121 and the second pole piece can be lowered
- the possibility of discounting or wrinkling 122 can improve the yield rate of the electrode assembly 12 .
- the first pole piece complex 125 and the second pole piece 122 are transported to the winding mechanism 106 for winding, effectively reducing
- the total number of sheets of the winding mechanism 106 is conducive to reducing the alignment difficulty of the first pole piece 121, the first diaphragm 123, the second diaphragm 124 and the second pole piece 122, and is especially conducive to improving the alignment of the first pole piece 121 and the second pole piece 121.
- the alignment accuracy of the pole piece 122 further improves the yield rate of the electrode assembly 12 .
- the first pole piece 121 enters the winding mechanism 106 under the drive of the first diaphragm 123 and the second diaphragm 124, and the winding auxiliary mechanism for guiding the first pole piece 121 into winding may not be provided, thereby simplifying the equipment structure and saving energy.
- the cutting and feeding time of the first pole piece 121 can shorten the production cycle of the electrode assembly 12 and is beneficial to improve the production efficiency of winding.
- the winding mechanism 106 includes a winding needle 1061 and a first pole piece winding guide roller set 107, the first pole piece winding guide roller set 107 is arranged upstream of the winding needle 1061, and the first pole piece winding The guide roller set 107 is used to transport the first pole piece composite 125 to the winding needle 1061 .
- the first pole piece complex 125 only needs to enter the winding needle 1061 under the drive of the first pole piece winding guide roller group 107, and does not need to set up an auxiliary winding mechanism, which is conducive to simplifying the complexity of the manufacturing equipment 100 and improving the electrode assembly 12. production efficiency.
- the rolling needle 1061 includes more than two semi-axes that can be close to or far away from each other.
- the winding includes two semi-axes, and the initial end of the first pole piece composite 125 is pre-clamped between the two semi-axes, and then The winding needle 1061 can rotate a predetermined number of turns.
- the second pole piece 122 is conveyed to the winding needle 1061, and is wound under the driving of the first pole piece composite 125.
- the second cutting process of the manufacturing equipment 100 is adopted.
- the mechanism 110 cuts the second pole piece 122, and the first pole piece composite 125 is cut off by the first cutting mechanism 109 of the manufacturing equipment 100, and finally the winding work is completed.
- the two half-shafts are opened, and the electrode assembly 12 is removed from the rolling pin 1061 to complete the blanking.
- the first pole piece assembly 125 is cut under the clamping of the winding needle 1061, which can reduce the fluctuation of the first pole piece assembly 125 in the cutting operation, especially the first pole piece assembly 125 along the The fluctuation in the width direction is beneficial to improve the alignment between the first pole piece complex 125 and the second pole piece 122 .
- the winding mechanism 106 includes a rotating base 1062 and at least two winding needles 1061 , the at least two winding needles 1061 surround the rotation axis of the rotating base 1062 and are arranged at intervals on the rotating base 1062 .
- Setting multiple needles 1061 is beneficial to the continuous production of the electrode assembly 12 .
- the number of rolling pins 1061 may be two, three, four, or five, etc., and the embodiment of the present application does not limit the number of rolling pins 1061 .
- the rotating base 1062 rotates so that the first rolling needle rotates to the blanking station, and one of the at least two rolling needles 1061 rotates to the winding station.
- the needle is used as the second winding needle, and after the second winding needle clamps the first pole piece assembly 125, it cuts off the first pole piece assembly 125 under the action of the first cutting mechanism 109.
- Each of the at least two rolling needles 1061 can be switched between the winding and unloading stations, and at least two rolling needles 1061 perform the winding and blanking work sequentially, so that when winding multiple In the process of the electrode assembly 12, only the first pole piece complex 125 needs to be rolled in once at the initial stage, and then at least two rolling needles 1061 alternately clamp the first pole piece complex 125 to carry out the winding work, which can Effectively improve the winding efficiency.
- the first cutting mechanism of the manufacturing equipment will generate dust during the cutting operation, and the dust may fall to the winding station, and the dust will be wound into the electrode assembly during the winding process, and the dust will pierce the first
- the diaphragm and/or the second diaphragm may lead to the possibility of conducting a short circuit between the first pole piece and the second pole piece, thereby causing potential safety hazards.
- the first cutting mechanism 109 is located between at least two winding needles 1061, and is used to cut off the first pole piece assembly 125.
- the first cutting mechanism 109 is located below the winding station, and the debris generated by the first cutting mechanism 109 will basically not fall to the winding station, which reduces the adverse effect of dust on the inside of the electrode assembly 12, thereby ensuring that the electrode assembly 12 safety features.
- the manufacturing equipment 100 includes a second cutting mechanism 110 located between the second pole piece feeding mechanism 105 and the winding mechanism 106 and used for cutting the second pole piece 122 .
- the second cutting mechanism 110 is arranged on the upstream of the winding mechanism 106, which is conducive to the smooth progress of the cutting operation, and the second cutting mechanism 110 is far away from the winding mechanism 106, which can effectively reduce the possibility of dust generated during the cutting process.
- the safety performance of the electrode assembly 12 is improved.
- the second cutting mechanism 110 includes a knife and a knife seat, and the second pole piece 122 passes between the knife and the knife seat. When it is necessary to cut off the second pole piece 122 , the cutter and the knife seat approach each other to cut off the second pole piece 122 .
- the second cutting mechanism 110 may be a laser cutter, which cuts off the second pole piece 122 by laser.
- the manufacturing equipment 100 further includes a feeding guide mechanism 108, the feeding guide mechanism 108 is arranged between the second pole piece feeding mechanism 105 and the winding mechanism 106, and the feeding guide mechanism 108 is used to transport the second pole piece 122 To the winding needle 1061, so that the first pole piece complex 125 is wrapped around the second pole piece 122.
- the feeding guide mechanism 108 can assist the winding of the second pole piece 122 and improve the alignment accuracy of the first pole piece assembly 125 and the second pole piece 122 , especially the alignment along the length direction of the first pole piece assembly 125 .
- the relative position of the feeding guide mechanism 108 and the winding mechanism 106 can be closer to shorten the length of the second pole piece 122 and reduce the length of the second pole piece. 122 fluctuations, thereby improving the alignment between the second pole piece 122 and the first pole piece composite 125, and improving the yield rate of the electrode assembly 12.
- the distance between the feeding guide mechanism 108 and the winding needle 1061 of the winding mechanism 106 may be ⁇ 50 mm, or ⁇ 45 mm.
- the manufacturing equipment 100 further includes a first detection mechanism 111, the first detection mechanism 111 is located between the composite mechanism 104 and the winding mechanism 106, and the first detection mechanism 111 is used to detect the first pole piece 121, the second Composite alignment of the first membrane 123 and the second membrane 124 .
- the first detection mechanism 111 is disposed downstream of the recombination mechanism 104 and can detect the alignment of the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 after recombination in real time.
- the first pole piece complex 125 can be transported to the winding mechanism 106 for winding, which is beneficial to ensure the winding after winding. The yield and quality of the electrode assembly 12.
- the first detection mechanism 111 can also detect surface defects of the first pole piece complex 125, such as whether there are impurities or damage on the surface of the first pole piece complex 125, and can be transported when the surface of the first pole piece complex 125 meets the requirements. Winding to the winding mechanism 106 is beneficial to further ensure the yield and quality of the wound electrode assembly 12 .
- the first detection mechanism 111 includes an industrial camera or a photoelectric sensor for detecting alignment.
- the manufacturing equipment 100 further includes a first deviation correction mechanism 112 and a second deviation correction mechanism 113 .
- the first deviation correction mechanism 112 is located between the compound mechanism 104 and the winding mechanism 106, and the first deviation correction mechanism 112 is used to adjust the relative position of the first pole piece complex 125 and the second pole piece 122, so as to adjust the first pole piece complex 125 and the alignment between the second pole piece 122.
- the first deviation correction mechanism 112 adjusts the relative position between the first pole piece complex 125 and the second pole piece 122 along the width direction of the first pole piece complex 125, so that the first pole piece complex 125 and the second pole piece 122 are aligned with each other, and the alignment between the two meets product requirements, which is beneficial to improving the yield rate of the electrode assembly 12 .
- the second deviation correction mechanism 113 is located between the second pole piece feeding mechanism 105 and the winding mechanism 106 , and the second deviation correction mechanism 113 is used to adjust the relative position of the first pole piece composite 125 and the second pole piece 122 .
- the second deviation correction mechanism 113 adjusts the relative position between the first pole piece composite 125 and the second pole piece 122 along the width direction of the second pole piece 122, so that the first pole piece composite 125 and the second pole piece 122 are mutually Alignment, the degree of alignment between the two meets product requirements, which is conducive to improving the yield of the electrode assembly 12 .
- the manufacturing equipment 100 further includes a second detection mechanism, the second detection mechanism is connected to the first deviation correction mechanism 112 and the second deviation correction mechanism 113 respectively, and the second detection mechanism detects that the first pole piece complex 125 and the second
- a signal is sent to the first deviation correction mechanism 112 and/or the second deviation correction mechanism 113, and then the first deviation correction mechanism 112 and/or the second deviation correction mechanism 113 perform a deviation correction operation to The alignment between the first pole piece complex 125 and the second pole piece 122 is adjusted.
- the manufacturing equipment 100 further includes a third deviation correction mechanism 114 , a fourth deviation correction mechanism 115 and a fifth deviation correction mechanism 116 .
- the third deviation correction mechanism 114 is located between the first pole piece feeding mechanism 101 and the compound mechanism 104 , and the third deviation correction mechanism 114 is used to adjust the relative positions of the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 .
- the fourth deviation correction mechanism 115 is located between the first diaphragm feeding mechanism 102 and the composite mechanism 104 , and the fourth deviation correction mechanism 115 is used to adjust the relative positions of the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 .
- the fifth deflection correction mechanism 116 is located between the second diaphragm feeding mechanism 103 and the composite mechanism 104 , and the fifth deflection correction mechanism 116 is used to adjust the relative position between the first pole piece 121 and the first diaphragm 123 and the second diaphragm 124 .
- the third deflection correction mechanism 114 adjusts the relative positions among the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 along the width direction of the first pole piece 121 , so that the three are aligned with each other.
- the fourth deflection correction mechanism 115 adjusts the relative positions among the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 along the width direction of the first diaphragm 123 so that the three are aligned with each other.
- the fifth deflection correction mechanism 116 adjusts the relative positions among the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 along the width direction of the second diaphragm 124 , so that the three are aligned with each other.
- the manufacturing equipment 100 further includes a third detection mechanism, the third detection mechanism is connected to the third deviation correction mechanism 114, the fourth deviation correction mechanism 115 and the fifth deviation correction mechanism 116 respectively, and the third detection mechanism detects that the first pole piece 121.
- the third detection mechanism detects that the first pole piece 121.
- send a signal to at least one of the third deviation correction mechanism 114, the fourth deviation correction mechanism 115, and the fifth deviation correction mechanism 116, and then the first At least one of the three deflection correction mechanisms 114 , the fourth deflection correction mechanism 115 and the fifth deflection correction mechanism 116 performs deflection correction operation to adjust the alignment between the first pole piece 121 , the first diaphragm 123 and the second diaphragm 124 .
- the manufacturing equipment 100 further includes a first tension mechanism 117 , a second tension mechanism 118 and a third tension mechanism 119 .
- the first tension mechanism 117 is arranged between the compound mechanism 104 and the winding mechanism 106, and the first tension mechanism 117 is used to adjust the tension degree of the first pole piece complex 125, so as to reduce the possibility of wrinkles of the first pole piece complex 125 risk and improve the yield of the electrode assembly 12.
- the second tension mechanism 118 is arranged between the second pole piece feeding mechanism 105 and the winding mechanism 106, and the second tension mechanism 118 is used to adjust the tension degree of the second pole piece 122, so as to reduce the possibility of wrinkling of the second pole piece 122 risk and improve the yield of the electrode assembly 12.
- the third tension mechanism 119 is arranged between the first pole piece feeding mechanism 101 and the composite mechanism 104, and the third tension mechanism 119 is used to adjust the tension degree of the first pole piece 121 to reduce the risk of wrinkles of the first pole piece 121 , improve the yield of the electrode assembly 12 .
- the manufacturing equipment 100 further includes a first roll changing mechanism 120 arranged between the first pole piece feeding mechanism 101 and the composite mechanism 104, and the two first The pole piece feeding mechanism 101 is respectively arranged on both sides of the first roll changing mechanism 120 .
- the two first pole piece feeding mechanisms 101 can be used as standby and the other is used. After the material roll of one of the first pole piece feeding mechanisms 101 is used up, the roll can be changed in time through the first roll changing mechanism 120, which is beneficial to improve production efficiency.
- the manufacturing equipment 100 further includes a second roll changing mechanism 130 arranged between the second pole piece feeding mechanism 105 and the winding mechanism 106, and the two second pole piece feeding mechanisms 105
- the two-pole piece feeding mechanism 105 is respectively arranged on two sides of the second roll changing mechanism 130 .
- the two second pole piece feeding mechanisms 105 can be used for one standby and the other for use. After the material roll of one of the second pole piece feeding mechanisms 105 is used up, the roll can be changed in time through the second roll changing mechanism 130, which is beneficial to improve production efficiency.
- the manufacturing equipment 100 further includes a diaphragm smoothing mechanism 140 and a back-adhesive glue mechanism 150 , the diaphragm smoothing mechanism 140 is used to compress the electrode assembly 12 so that the electrode assembly 12 does not unwind.
- the back adhesive adhesive mechanism 150 is used to bond the electrode assembly 12 to make the electrode assembly 12 shape.
- the manufacturing equipment 100 further includes a pre-pressing mechanism 160, and the pre-pressing mechanism 160 is used to flatten the electrode assembly 12 into a flat structure.
- the electrode assembly 12 can be wound into a hollow cylindrical structure first, and then flattened into a flat shape by the pre-pressing mechanism 160 after winding.
- the electrode assembly 12 after the pre-pressing is transported to the subsequent process through the transport component 170 such as a transport belt.
- the embodiment of the present application also provides a method for manufacturing an electrode assembly, which can be performed by using the manufacturing equipment of the above embodiment.
- Fig. 4 is a schematic flowchart of a method for manufacturing an electrode assembly provided by some embodiments of the present application.
- the method includes the following steps:
- the first aspect is to combine the first diaphragm, the first pole piece and the second diaphragm in advance.
- the first aspect can reduce the risk of warping, folding or wrinkling of the first pole piece, and improve the electrode Component yield.
- the first pole piece, the first diaphragm and the second diaphragm are pre-aligned and composited into one, the first pole piece composite and the second pole piece are transported to the winding mechanism for winding, which effectively reduces the winding
- the total number of pieces of the mechanism is conducive to reducing the difficulty of alignment of the first pole piece, the first diaphragm, the second diaphragm and the second pole piece, and is especially conducive to improving the alignment accuracy of the first pole piece and the second pole piece, further improving The yield rate of the electrode assembly has been improved.
- the first pole piece enters the winding mechanism driven by the first diaphragm and the second diaphragm, and there is no need to set up a winding auxiliary mechanism to guide the first pole piece into the winding, thereby simplifying the equipment structure and helping to improve Winding productivity.
- Fig. 5 is a schematic flowchart of a method for manufacturing an electrode assembly provided by another embodiment of the present application.
- the method also includes:
- the dust generated during the cutting operation of the first pole piece composite basically does not affect the winding operation, thereby improving the safety performance of the electrode assembly.
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Abstract
本申请涉及一种电极组件的制造设备以及制造方法。该电极组件的制造设备包括：第一极片送料机构，用于输送第一极片；第一隔膜送料机构，用于输送第一隔膜；第二隔膜送料机构，用于输送第二隔膜；复合机构，设置于第一极片送料机构、第一隔膜送料机构和第二隔膜送料机构的下游，复合机构用于将第一隔膜、第一极片和第二隔膜依次层叠复合为第一极片复合体；第二极片送料机构，用于输送第二极片，第二极片和第一极片的极性相反；以及卷绕机构，设置于复合机构和第二极片送料机构的下游，并用于将第一极片复合体和第二极片卷绕以形成电极组件。本申请实施例的制造设备能够提高电极组件的生产效率和良品率。
Description
相关申请的交叉引用
本申请要求享有于2021年12月21日提交的名称为“电极组件的制造设备以及制造方法”的中国专利申请202111574653.7的优先权，该申请的全部内容通过引用并入本文中。
本申请涉及电池生产技术领域，特别是涉及一种电极组件的制造设备以及制造方法。
电池单体具有比能量高、功率密度高等优点，在新能源领域中作为主要能量源，对新能源领域的发展起着非常重要的决定性意义。而电极组件作为电池单体的组成单位，其性能对电池单体具有重要影响。
在电极组件的生产过程中，如何提高电极组件的生产效率和良品率，是亟待解决的问题。
发明内容
本申请提供一种电极组件的制造设备以及制造方法，旨在提高电极组件的生产效率和良品率。
第一方面，本申请提出了一种电极组件的制造设备，包括：第一极片送料机构，用于输送第一极片；第一隔膜送料机构，用于输送第一隔膜；第二隔膜送料机构，用于输送第二隔膜；复合机构，设置于第一极片送料机构、第一隔膜送料机构和第二隔膜送料机构的下游，复合机构用于将第一隔膜、第一极片和第二隔膜依次层叠复合为第一极片复合体；第二极片送料机构，用于输送第二极片，第二极片和第一极片的极性相反；以及卷绕机构，设置于复合机构和第二极片送料机构的下游，并用于将第一极片复合体和第二极片卷绕以形成电极组件。
本申请实施例通过将第一极片、第一隔膜和第二隔膜预先复合为一体形成第一极片复合体，第一极片在其厚度方向的两侧分别被第一隔膜和第二隔膜所覆盖，在输 送过程中第一极片不容易发生翘起、打折或褶皱等现象，且第一极片不容易与第一隔膜和第二隔膜剥离，不需额外设置贴胶设备对第一极片进行固定，第一极片复合体和第二极片进入卷绕机构卷绕，能够降低第一极片和第二极片打折或褶皱的可能性，能够提高电极组件的良品率。由于第一极片、第一隔膜和第二隔膜预先对齐并复合为一体，将第一极片复合体和第二极片输送至卷绕机构卷绕，有效减少了进入卷绕机构的片体总数量，有利于降低第一极片、第一隔膜、第二隔膜和第二极片的对齐难度，尤其有利于提高第一极片和第二极片的对齐精度，进一步提高了电极组件的良品率。第一极片在第一隔膜和第二隔膜的带动下进入卷绕机构，可以不设置引导第一极片入卷的入卷辅助机构，从而简化了设备结构，同时能够节约第一极片的切断和送料时间，能够缩减电极组件的生产周期，有利于提高卷绕的生产效率。
在一些实施例中，卷绕机构包括卷针和第一极片入卷导辊组，第一极片入卷导辊组设置于卷针的上游，第一极片入卷导辊组用于将第一极片复合体输送至卷针。在本申请实施例中，第一极片复合体只需在第一极片入卷导辊组的带动下进入卷针，不需设置辅助入卷机构，有利于简化制造设备的复杂度，提高电极组件的生产效率。
在一些实施例中，制造设备还包括送料导向机构，送料导向机构设置于第二极片送料机构和卷绕机构之间，送料导向机构用于将第二极片输送至卷针，以使第一极片复合体包覆于第二极片外。在本申请实施例中，送料导向机构能够辅助第二极片入卷，提高第一极片复合体和第二极片的对齐精度，尤其是沿第一极片复合体的长度方向的对齐度。
在一些实施例中，卷绕机构还包括旋转底座以及至少两个卷针，至少两个卷针环绕旋转底座的转动轴线并间隔设置于旋转底座。本申请实施例设置多个卷针有利于电极组件的连续化生产。
在一些实施例中，制造设备还包括第一切断机构，第一切断机构位于至少两个卷针之间，且用于切断第一极片复合体；和/或制造设备还包括第二切断机构，第二切断机构位于第二极片送料机构和卷绕机构之间，且用于切断第二极片。在本申请实施例中，第一切断机构位于卷绕工位的下方，第一切断机构产生的碎屑基本不会掉落至卷绕工位，降低了粉尘对电极组件内部的不利影响，从而能够保证电极组件的安全性能。第二切断机构设置于卷绕机构的上游，有利于切断操作的顺利进行，且第二切断机构远离卷绕机构，能够有效降低切断过程中所产生的粉尘入卷的可能性，提高电极组件的安全性能。
在一些实施例中，制造设备还包括第一检测机构，第一检测机构位于复合机构和卷绕机构之间，且第一检测机构用于检测第一极片、第一隔膜和第二隔膜的复合对齐度。第一检测机构能够实时检测第一极片、第一隔膜和第二隔膜复合后的对齐度。在本申请实施例中，在第一极片、第一隔膜和第二隔膜的对齐度达到精度要求时，第一极片复合体才可以输送至卷绕机构进行卷绕，有利于保证卷绕后的电极组件的良品率和品质
在一些实施例中，制造设备还包括第一纠偏机构和第二纠偏机构，第一纠偏机 构位于复合机构和卷绕机构之间，第一纠偏机构用于调整第一极片复合体和第二极片的相对位置；第二纠偏机构位于第二极片送料机构和卷绕机构之间，第二纠偏机构用于调整第一极片复合体和第二极片的相对位置。在本申请实施例中，第一纠偏机构和第二纠偏机构能够调整第一极片复合体和第二极片之间的相对位置，以使第一极片复合体和第二极片彼此对齐，二者之间的对齐度满足产品要求，有利于提高电极组件的良品率。
在一些实施例中，制造设备还包括第三纠偏机构、第四纠偏机构和第五纠偏机构；第三纠偏机构位于第一极片送料机构和复合机构之间，第三纠偏机构用于调整第一极片、第一隔膜以及第二隔膜之间的相对位置；第四纠偏机构位于第一隔膜送料机构和复合机构之间，第四纠偏机构用于调整第一极片、第一隔膜以及第二隔膜之间的相对位置；第五纠偏机构位于第二隔膜送料机构和复合机构之间，第五纠偏机构用于调整第一极片和第一隔膜以及第二隔膜之间的相对位置。在本申请实施例中，第三纠偏机构、第四纠偏机构和第五纠偏机构能够调整第一极片、第一隔膜和第二隔膜之间的相对位置，以使三者彼此对齐。
在一些实施例中，制造设备还包括第一张力机构、第二张力机构和第三张力机构；第一张力机构设置于复合机构和卷绕机构之间，第一张力机构用于调整第一极片复合体的张紧程度；第二张力机构设置于第二极片送料机构和卷绕机构之间，第二张力机构用于调整第二极片的张紧程度；第三张力机构设置于第一极片送料机构和复合机构之间，第三张力机构用于调整第一极片的张紧程度。
在上述技术方案中，第一张力机构用于调整第一极片复合体的张紧程度，以降低第一极片复合体发生褶皱的风险。第二张力机构设置于第二极片送料机构和卷绕机构之间，第二张力机构用于调整第二极片的张紧程度，以降低第二极片发生褶皱的风险。第三张力机构用于调整第一极片的张紧程度，以降低第一极片发生褶皱的风险，提高电极组件的良品率。
在一些实施例中，第一极片送料机构设置为两个，制造设备还包括设置于第一极片送料机构和复合机构之间的第一换卷机构，两个第一极片送料机构分别设置于第一换卷机构的两侧；和/或第二极片送料机构设置为两个，制造设备还包括设置于第二极片送料机构和卷绕机构之间的第二换卷机构，两个第二极片送料机构分别设置于第二换卷机构的两侧。本申请实施例通过第一换卷机构和第二换卷机构及时换卷，有利于提高生产效率。
第二方面，本申请实施例还提供了一种电极组件的制造方法，包括：提供第一隔膜、第一极片和第二隔膜；将第一隔膜、第一极片和第二隔膜依次层叠复合为第一极片复合体；提供第二极片；将第一极片复合体和第二极片一同卷绕形成电极组件，其中，第一极片和第二极片通过第一隔膜和第二隔膜隔离设置。
在一些实施例中，还包括：将第二极片和第一极片复合体输送至卷绕工位并卷绕后，将第二极片切断和第一极片复合体切断。
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例中所需要使用的附图作简单地介绍，显而易见地，下面所描述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，还可以根据附图获得其他的附图。
图1是本申请一些实施例提供的电池单体的分解示意图；
图2是本申请一些实施例提供的电极组件的结构示意图；
图3是本申请一些实施例提供的电极组件的制造设备的结构示意图；
图4是本申请一些实施例提供的电极组件的制造方法的流程示意图；
图5是本申请另一些实施例提供的电极组件的制造方法的流程示意图。
在附图中，附图未必按照实际的比例绘制。
其中，图中各附图标记：
10、电池单体；11、壳体；12、电极组件；12a、主体部；12b、极耳部；121、第一极片；122、第二极片；123、第一隔膜；124、第二隔膜；125、第一极片复合体；13、端盖组件；
100、制造设备；
101、第一极片送料机构；
102、第一隔膜送料机构；
103、第二隔膜送料机构；
104、复合机构；
105、第二极片送料机构；
106、卷绕机构；1061、卷针；1062、旋转底座；
107、第一极片入卷导辊组；
108、送料导向机构；
109、第一切断机构；
110、第二切断机构；
111、第一检测机构；
112、第一纠偏机构；
113、第二纠偏机构；
114、第三纠偏机构；
115、第四纠偏机构；
116、第五纠偏机构；
117、第一张力机构；
118、第二张力机构；
119、第三张力机构；
120、第一换卷机构；
130、第二换卷机构；
140、隔膜抚平机构；
150、背胶粘胶机构；
160、预压机构；
170、运输组件。
下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。
在本申请的描述中，需要说明的是，除非另有说明，“多个”的含义是两个以上；术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的机构或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。“垂直”并不是严格意义上的垂直，而是在误差允许范围之内。“平行”并不是严格意义上的平行，而是在误差允许范围之内。
在本申请的描述中，还需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连。对于本领域的普通技术人员而言，可视具体情况理解上述术语在本申请中的具体含义。
本申请中，电池单体可以包括锂离子二次电池单体、锂离子一次电池单体、锂硫电池单体、锂钠离子电池单体、钠离子电池单体或镁离子电池单体等，本申请实施例对此并不限定。电池单体可呈圆柱体、扁平体、长方体或其它形状等，本申请实施例对此也不限定。电池单体一般按封装的方式分成三种：柱形电池单体、方体方形电池单体和软包电池单体，本申请实施例对此也不限定。
电池单体包括电极组件，电极组件是电池单体充放电的核心构件。电池单体包括电极组件和电解质，电极组件包括正极极片、负极极片和隔离件。电池单体主要依靠金属离子在正极极片和负极极片之间移动来工作。正极极片包括正极集流体和正极活性物质层，正极活性物质层涂覆于正极集流体的表面；正极集流体包括正极集流部和凸出于正极集流部的正极极耳，正极集流部涂覆有正极活性物质层，正极极耳的至少部分未涂覆正极活性物质层。以锂离子电池单体为例，正极集流体的材料可以为铝，正极活性物质层包括正极活性物质，正极活性物质可以为钴酸锂、磷酸铁锂、三元锂或锰酸锂等。负极极片包括负极集流体和负极活性物质层，负极活性物质层涂覆于负极集流体的表面；负极集流体包括负极集流部和凸出于负极集流部的负极极耳，负极集流部涂覆有负极活性物质层，负极极耳的至少部分未涂覆负极活性物质层。负极集流体的材料可以为铜，负极活性物质层包括负极活性物质，负极活性物质可以为碳或硅等。为了保证通过大电流而不发生熔断，正极极耳的数量为多个且层叠在一 起，负极极耳的数量为多个且层叠在一起。隔离件的材质可以为PP(polypropylene，聚丙烯)或PE(polyethylene，聚乙烯)等。
发明人发现，在制备电极组件时，将正极极片、隔离件和负极极片分别输入卷绕机构中进行卷绕，正极极片、隔离件和负极极片依次层叠并卷绕两圈以上以形成电极组件。在制备过程中，需要单独辅助正极极片、隔离件和负极极片入卷，其生产效率较低。入卷的片体数量较多，控制对齐度的难度较高，正极极片和负极极片之间容易发生错位，导致电极组件的良品率较低。
鉴于此，发明人对制造电极组件的设备进行了改进，下面对本申请实施例进行进一步描述。
为了更好地理解本申请，下面结合图1至图5对本申请实施例进行描述。
图1是本申请一些实施例提供的电池单体的分解示意图。图2是本申请一些实施例提供的电极组件的结构示意图。
如图1和图2所示，本申请实施例的电池单体10包括壳体11、设置于壳体11内的电极组件12以及与壳体11密封连接的端盖组件13。壳体11为方形结构、圆柱结构或其他形状，壳体11的形状根据电极组件12的外形确定。壳体11具有容纳电极组件12和电解液的内部空间以及与内部空间相连通的开口。壳体11可以由例如铝、铝合金或塑料等材料制造。
电极组件12包括第一极片121、第二极片122、第一隔膜123和第二隔膜124。第一极片121和第二极片122的极性相反，示例性地，第一极片121为正极极片，相应地，第二极片122为负极极片；或者第一极片121为负极极片，相应地，第二极片122为正极极片。可选地，第一极片121可以为负极极片，负极极片的尺寸规格(例如长度、宽度)大于正极极片的尺寸规格。第一隔膜123和第二隔膜124构成隔离件，第一隔膜123和第二隔膜124是介于第一极片121和第二极片122之间的绝缘体。
第一极片121、第一隔膜123和第二隔膜124预先复合为第一极片复合体125，再将第一极片复合体125和第二极片122复合时，能够降低控制对齐的难度，提高复合的对齐度。
在本申请实施例中，从电极组件12的外形来看，电极组件12包括主体部12a和连接于主体部12a的极耳部12b。主体部12a的整体为扁平状结构，具有预定的厚度、高度和宽度。电极组件12可先卷绕呈中空的柱形结构，卷绕后再压平为扁平状。当然，电极组件12也可以直接卷绕为扁平状结构。
本申请实施例描述的电池单体10用于使用电池单体的用电装置。用电装置可以是车辆、手机、便携式设备、笔记本电脑、轮船、航天器、电动玩具和电动工具等等。车辆可以是燃油汽车、燃气汽车或新能源汽车，新能源汽车可以是纯电动汽车、混合动力汽车或增程式汽车等；航天器包括飞机、火箭、航天飞机和宇宙飞船等等；电动玩具包括固定式或移动式的电动玩具，例如，游戏机、电动汽车玩具、电动轮船玩具和电动飞机玩具等等；电动工具包括金属切削电动工具、研磨电动工具、装配电 动工具和铁道用电动工具，例如，电钻、电动砂轮机、电动扳手、电动螺丝刀、电锤、冲击电钻、混凝土振动器和电刨等等。本申请实施例对上述用电装置不做特殊限制。
图3是本申请一些实施例提供的电极组件的制造设备的结构示意图。
如图3所示，本申请实施例提供了一种电极组件的制造设备。该制造设备100包括第一极片送料机构101、第一隔膜送料机构102、第二隔膜送料机构103、复合机构104、第二极片送料机构105和卷绕机构106。第一极片送料机构101用于输送第一极片121。第一隔膜送料机构102用于输送第一隔膜123。第二隔膜送料机构103用于输送第二隔膜124。复合机构104设置于第一极片送料机构101、第一隔膜送料机构102和第二隔膜送料机构103的下游，复合机构104用于将第一隔膜123、第一极片121和第二隔膜124依次层叠复合为第一极片复合体125。第二极片送料机构105用于输送第二极片122，第二极片122和第一极片121的极性相反。卷绕机构106设置于复合机构104和第二极片送料机构105的下游，并用于将第一极片复合体125和第二极片122卷绕以形成电极组件12。
第一极片送料机构101用于安装固定第一极片121的料卷，可以通过放卷机构输送第一极片121。第一极片121在输送辊组的带动下朝向复合机构104移动。
第一隔膜送料机构102用于安装固定第一隔膜123的料卷，可以通过放卷机构输送第一隔膜123。第一隔膜123在输送辊组的带动下朝向复合机构104移动。
第二隔膜送料机构103用于安装固定第二隔膜124的料卷，可以通过放卷机构输送第二隔膜124。第二隔膜124在输送辊组的带动下朝向复合机构104移动。
第一极片121、第一隔膜123和第二隔膜124均被输送至复合机构104，且第一隔膜123、第一极片121和第二隔膜124沿第一极片121的厚度方向依次层叠设置，复合机构104将第一隔膜123、第一极片121和第二隔膜124复合为第一极片复合体125。复合方式包括热压、静电吸附、粘接或等离子吸附等方式。
作为一些示例，复合机构104包括热压机构，第一隔膜123、第一极片121和第二隔膜124通过热压机构实现热压复合。作为另一些示例，复合机构104包括静电发生器，第一隔膜123、第一极片121和第二隔膜124通过静电吸附实现复合连接。作为再一些示例，复合机构104包括贴胶机构，第一隔膜123、第一极片121和第二隔膜124通过粘接实现复合连接。作为再一些示例，复合机构104包括等离子吸附装置，第一隔膜123、第一极片121和第二隔膜124通过等离子吸附实现复合连接。
第二极片送料机构105用于安装固定第二极片122的料卷，可以通过放卷机构输送第二极片122。第二极片122在输送辊组的带动下朝向卷绕机构106移动。
卷绕机构106设置于复合机构104和第二极片送料机构105的下游，第一极片复合体125和第二极片122分别被输送至卷绕机构106中被卷绕复合为电极组件12。
本申请实施例通过将第一极片121、第一隔膜123和第二隔膜124预先复合为一体形成第一极片复合体125，第一极片121在其厚度方向的两侧分别被第一隔膜123和第二隔膜124所覆盖，在输送过程中第一极片121不容易发生翘起、打折或褶皱等 现象，且第一极片121不容易与第一隔膜123和第二隔膜124剥离，不需额外设置贴胶设备对第一极片121进行固定，第一极片复合体125和第二极片122进入卷绕机构106卷绕，能够降低第一极片121和第二极片122打折或褶皱的可能性，能够提高电极组件12的良品率。
由于第一极片121、第一隔膜123和第二隔膜124预先对齐并复合为一体，将第一极片复合体125和第二极片122输送至卷绕机构106卷绕，有效减少了进入卷绕机构106的片体总数量，有利于降低第一极片121、第一隔膜123、第二隔膜124和第二极片122的对齐难度，尤其有利于提高第一极片121和第二极片122的对齐精度，进一步提高了电极组件12的良品率。第一极片121在第一隔膜123和第二隔膜124的带动下进入卷绕机构106，可以不设置引导第一极片121入卷的入卷辅助机构，从而简化了设备结构，同时能够节约第一极片121的切断和送料时间，能够缩减电极组件12的生产周期，有利于提高卷绕的生产效率。
在一些实施例中，卷绕机构106包括卷针1061和第一极片入卷导辊组107，第一极片入卷导辊组107设置于卷针1061的上游，第一极片入卷导辊组107用于将第一极片复合体125输送至卷针1061。第一极片复合体125只需在第一极片入卷导辊组107的带动下进入卷针1061，不需设置辅助入卷机构，有利于简化制造设备100的复杂度，提高电极组件12的生产效率。
卷针1061包括两个以上可以相互靠近或远离的半轴，示例性地，卷绕包括两个半轴，在两个半轴之间预先夹住第一极片复合体125的起始端，然后卷针1061可以转动预定圈数。然后，第二极片122被输送至卷针1061，在第一极片复合体125的带动下进行卷绕，在卷绕预定长度的第二极片122之后，采用制造设备100的第二切断机构110切断第二极片122，采用制造设备100的第一切断机构109切断第一极片复合体125，并最终完成卷绕工作。两个半轴张开，将电极组件12从卷针1061上移走，完成下料。在本申请实施例中，第一极片复合体125在卷针1061的夹紧下切断，能够降低第一极片复合体125在切断操作中的波动，尤其是第一极片复合体125沿宽度方向的波动，有利于提高第一极片复合体125和第二极片122之间的对齐度。
在一些示例中，卷绕机构106包括旋转底座1062以及至少两个卷针1061，至少两个卷针1061环绕旋转底座1062的转动轴线并间隔设置于旋转底座1062。设置多个卷针1061有利于电极组件12的连续化生产。卷针1061的数量可以为两个、三个、四个或五个等等，本申请实施例不对卷针1061的数量进行限定。
在第一个卷针完成卷绕工作后，旋转底座1062转动，以使第一个卷针旋转至下料工位，至少两个卷针1061中的其中一个旋转至卷绕工位，该卷针作为第二个卷针，第二个卷针夹住第一极片复合体125之后，在第一切断机构109的作用下切断第一极片复合体125。至少两个卷针1061中的每个卷针1061均可以在卷绕和下料工位之间进行切换，至少两个卷针1061依次循环执行卷绕和下料工作，从而在卷绕多个电极组件12的过程中，只需将第一极片复合体125在起始阶段执行一次入卷工作，之后至少两个卷针1061交替夹持第一极片复合体125进行卷绕工作，能够有效提高卷绕工作 效率。
制造设备的第一切断机构在执行切断操作的过程中会产生粉尘等，粉尘可能会掉落至卷绕工位，在卷绕过程中将粉尘卷绕至电极组件中，存在粉尘刺破第一隔膜和/或第二隔膜导致第一极片和第二极片导通发生短路的可能性，从而引发安全隐患。
为了降低第一切断机构109所产生的粉尘对电极组件12的不利影响，在一些实施例中，第一切断机构109位于至少两个卷针1061之间，且用于切断第一极片复合体125。第一切断机构109位于卷绕工位的下方，第一切断机构109产生的碎屑基本不会掉落至卷绕工位，降低了粉尘对电极组件12内部的不利影响，从而能够保证电极组件12的安全性能。
在一些实施例中，制造设备100包括第二切断机构110，第二切断机构110位于第二极片送料机构105和卷绕机构106之间，且用于切断第二极片122。第二切断机构110设置于卷绕机构106的上游，有利于切断操作的顺利进行，且第二切断机构110远离卷绕机构106，能够有效降低切断过程中所产生的粉尘入卷的可能性，提高电极组件12的安全性能。在一些示例中，第二切断机构110包括刀具和刀座，第二极片122从刀具和刀座之间通过。在需要切断第二极片122时，刀具和刀座相互靠近以切断第二极片122。示例性地，第二切断机构110可以是激光切割器，通过激光切断第二极片122。
在一些实施例中，制造设备100还包括送料导向机构108，送料导向机构108设置于第二极片送料机构105和卷绕机构106之间，送料导向机构108用于将第二极片122输送至卷针1061，以使第一极片复合体125包覆于第二极片122外。送料导向机构108能够辅助第二极片122入卷，提高第一极片复合体125和第二极片122的对齐精度，尤其是沿第一极片复合体125的长度方向的对齐度。且在第一极片复合体125不需设置辅助送料机构的基础上，送料导向机构108与卷绕机构106的相对位置可以更靠近，以缩短第二极片122收尾长度，降低第二极片122波动的风险，从而提高第二极片122和第一极片复合体125之间的对齐度，提高电极组件12的良品率。示例性地，送料导向机构108距离卷绕机构106的卷针1061距离可以为≥50mm，或者≥45mm。
在一些实施例中，制造设备100还包括第一检测机构111，第一检测机构111位于复合机构104和卷绕机构106之间，且第一检测机构111用于检测第一极片121、第一隔膜123和第二隔膜124的复合对齐度。
第一检测机构111设置于复合机构104的下游，能够实时检测第一极片121、第一隔膜123和第二隔膜124复合后的对齐度。在第一极片121、第一隔膜123和第二隔膜124的对齐度达到精度要求时，第一极片复合体125才可以输送至卷绕机构106进行卷绕，有利于保证卷绕后的电极组件12的良品率和品质。当然第一检测机构111还可以检测第一极片复合体125表面缺陷，例如第一极片复合体125的表面是否存在杂质或破损，在第一极片复合体125的表面满足要求时可以输送至卷绕机构106进行卷绕，有利于进一步保证卷绕后的电极组件12的良品率和品质。作为一些示例，第一 检测机构111包括用于检测对齐度的工业摄像机或光电传感器。
在一些实施例中，制造设备100还包括第一纠偏机构112和第二纠偏机构113。第一纠偏机构112位于复合机构104和卷绕机构106之间，第一纠偏机构112用于调整第一极片复合体125和第二极片122的相对位置，以调整第一极片复合体125和第二极片122之间的对齐度。第一纠偏机构112沿第一极片复合体125的宽度方向调整第一极片复合体125和第二极片122之间的相对位置，以使第一极片复合体125和第二极片122彼此对齐，二者之间的对齐度满足产品要求，有利于提高电极组件12的良品率。第二纠偏机构113位于第二极片送料机构105和卷绕机构106之间，第二纠偏机构113用于调整第一极片复合体125和第二极片122的相对位置。第二纠偏机构113沿第二极片122的宽度方向调整第一极片复合体125和第二极片122之间的相对位置，以使第一极片复合体125和第二极片122彼此对齐，二者之间的对齐度满足产品要求，有利于提高电极组件12的良品率。
可选地，制造设备100还包括第二检测机构，第二检测机构分别与第一纠偏机构112和第二纠偏机构113通信连接，第二检测机构检测到第一极片复合体125和第二极片122之间的对齐度不满足要求时，将信号发送至第一纠偏机构112和/或第二纠偏机构113，然后第一纠偏机构112和/或第二纠偏机构113执行纠偏操作，以调整第一极片复合体125和第二极片122之间的对齐度。
在一些实施例中，制造设备100还包括第三纠偏机构114、第四纠偏机构115和第五纠偏机构116。第三纠偏机构114位于第一极片送料机构101和复合机构104之间，第三纠偏机构114用于调整第一极片121、第一隔膜123以及第二隔膜124之间的相对位置。第四纠偏机构115位于第一隔膜送料机构102和复合机构104之间，第四纠偏机构115用于调整第一极片121、第一隔膜123以及第二隔膜124之间的相对位置。第五纠偏机构116位于第二隔膜送料机构103和复合机构104之间，第五纠偏机构116用于调整第一极片121和第一隔膜123以及第二隔膜124之间的相对位置。第三纠偏机构114沿第一极片121的宽度方向调整第一极片121、第一隔膜123和第二隔膜124之间的相对位置，以使三者彼此对齐。第四纠偏机构115沿第一隔膜123的宽度方向调整第一极片121、第一隔膜123和第二隔膜124之间的相对位置，以使三者彼此对齐。第五纠偏机构116沿第二隔膜124的宽度方向调整第一极片121、第一隔膜123和第二隔膜124之间的相对位置，以使三者彼此对齐。
可选地，制造设备100还包括第三检测机构，第三检测机构分别与第三纠偏机构114、第四纠偏机构115和第五纠偏机构116通信连接，第三检测机构检测到第一极片121、第一隔膜123和第二隔膜124之间的对齐度不满足要求时，将信号发送至第三纠偏机构114、第四纠偏机构115和第五纠偏机构116中的至少一者，然后第三纠偏机构114、第四纠偏机构115和第五纠偏机构116中的至少一者执行纠偏操作，以调整第一极片121、第一隔膜123和第二隔膜124之间的对齐度。
在一些实施例中，制造设备100还包括第一张力机构117、第二张力机构118和第三张力机构119。第一张力机构117设置于复合机构104和卷绕机构106之间，第 一张力机构117用于调整第一极片复合体125的张紧程度，以降低第一极片复合体125发生褶皱的风险，提高电极组件12的良品率。第二张力机构118设置于第二极片送料机构105和卷绕机构106之间，第二张力机构118用于调整第二极片122的张紧程度，以降低第二极片122发生褶皱的风险，提高电极组件12的良品率。第三张力机构119设置于第一极片送料机构101和复合机构104之间，第三张力机构119用于调整第一极片121的张紧程度，以降低第一极片121发生褶皱的风险，提高电极组件12的良品率。
在一些实施例中，第一极片送料机构101设置为两个，制造设备100还包括设置于第一极片送料机构101和复合机构104之间的第一换卷机构120，两个第一极片送料机构101分别设置于第一换卷机构120的两侧。两个第一极片送料机构101可以一备一用，在其中一个第一极片送料机构101的料卷用尽后，通过第一换卷机构120及时换卷，有利于提高生产效率。
在一些实施例中，第二极片送料机构105设置为两个，制造设备100还包括设置于第二极片送料机构105和卷绕机构106之间的第二换卷机构130，两个第二极片送料机构105分别设置于第二换卷机构130的两侧。两个第二极片送料机构105可以一备一用，在其中一个第二极片送料机构105的料卷用尽后，通过第二换卷机构130及时换卷，有利于提高生产效率。
在一些实施例中，制造设备100还包括隔膜抚平机构140和背胶粘胶机构150，隔膜抚平机构140用于压紧电极组件12，以使电极组件12不松卷。背胶粘胶机构150用于粘结电极组件12，以使电极组件12定形。
在一些实施例中，制造设备100还包括预压机构160，预压机构160用于将电极组件12压平为扁平状结构。电极组件12可先卷绕呈中空的柱形结构，卷绕后经预压机构160压平为扁平状。预压结束后的电极组件12通过运输组件170如运输皮带输送至后续工序。
本申请实施例还提供了一种电极组件的制造方法，可以利用上述实施例的制造设备执行该方法。
图4是本申请一些实施例提供的电极组件的制造方法的流程示意图。
如图4所示，该方法包括以下步骤：
S100，提供第一隔膜、第一极片和第二隔膜；
S200，将第一隔膜、第一极片和第二隔膜依次层叠复合为第一极片复合体；
S300，提供第二极片；
S400，将第一极片复合体和第二极片一同卷绕形成电极组件，其中，第一极片和第二极片通过第一隔膜和第二隔膜隔离设置。
在本申请实施例中，第一方面，预先将第一隔膜、第一极片和第二隔膜复合为一体，第一方面能够降低第一极片发生翘起、打折或褶皱的风险，提高电极组件的良品率。第二方面，由于第一极片、第一隔膜和第二隔膜预先对齐并复合为一体，将第一极片复合体和第二极片输送至卷绕机构卷绕，有效减少了进入卷绕机构的片体总 数量，有利于降低第一极片、第一隔膜、第二隔膜和第二极片的对齐难度，尤其有利于提高第一极片和第二极片的对齐精度，进一步提高了电极组件的良品率。第三方面，第一极片在第一隔膜和第二隔膜的带动下进入卷绕机构，可以不设置引导第一极片入卷的入卷辅助机构，从而简化了设备结构，同时有利于提高卷绕的生产效率。
图5是本申请另一些实施例提供的电极组件的制造方法的流程示意图。
如图5所示，在一些实施例中，该方法还包括：
S500，将第二极片和第一极片复合体输送至卷绕工位并卷绕后，将第二极片切断和第一极片复合体切断。
第一极片复合体切断操作产生的粉尘基本不会对入卷操作造成影响，从而能够提高电极组件的安全性能。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件，尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。
Claims (12)
- 一种电极组件的制造设备，包括：第一极片送料机构，用于输送第一极片；第一隔膜送料机构，用于输送第一隔膜；第二隔膜送料机构，用于输送第二隔膜；复合机构，设置于所述第一极片送料机构、所述第一隔膜送料机构和所述第二隔膜送料机构的下游，所述复合机构用于将所述第一隔膜、所述第一极片和所述第二隔膜依次层叠复合为第一极片复合体；第二极片送料机构，用于输送第二极片，所述第二极片和所述第一极片的极性相反；以及卷绕机构，设置于所述复合机构和所述第二极片送料机构的下游，并用于将所述第一极片复合体和所述第二极片卷绕以形成电极组件。
- 根据权利要求1所述的电极组件的制造设备，其中，所述卷绕机构包括卷针和第一极片入卷导辊组，所述第一极片入卷导辊组设置于所述卷针的上游，所述第一极片入卷导辊组用于将所述第一极片复合体输送至所述卷针。
- 根据权利要求2所述的电极组件的制造设备，所述制造设备还包括送料导向机构，所述送料导向机构设置于所述第二极片送料机构和所述卷绕机构之间，所述送料导向机构用于将所述第二极片输送至所述卷针，以使所述第一极片复合体包覆于所述第二极片外。
- 根据权利要求2所述的电极组件的制造设备，其中，所述卷绕机构还包括旋转底座以及至少两个所述卷针，至少两个所述卷针环绕所述旋转底座的转动轴线并间隔设置于所述旋转底座。
- 根据权利要求4所述的电极组件的制造设备，所述制造设备还包括第一切断机构，所述第一切断机构位于至少两个所述卷针之间，且用于切断所述第一极片复合体；和/或所述制造设备还包括第二切断机构，所述第二切断机构位于所述第二极片送料机构和所述卷绕机构之间，且用于切断所述第二极片。
- 根据权利要求1至5中任一项所述的电极组件的制造设备，所述制造设备还包括第一检测机构，所述第一检测机构位于所述复合机构和所述卷绕机构之间，且所述第一检测机构用于检测所述第一极片、所述第一隔膜和所述第 二隔膜的复合对齐度。
- 根据权利要求1至6中任一项所述的电极组件的制造设备，所述制造设备还包括第一纠偏机构和第二纠偏机构，所述第一纠偏机构位于所述复合机构和所述卷绕机构之间，所述第一纠偏机构用于调整所述第一极片复合体和所述第二极片的相对位置；所述第二纠偏机构位于所述第二极片送料机构和所述卷绕机构之间，所述第二纠偏机构用于调整所述第一极片复合体和所述第二极片的相对位置。
- 根据权利要求1至7中任一项所述的电极组件的制造设备，所述制造设备还包括第三纠偏机构、第四纠偏机构和第五纠偏机构；所述第三纠偏机构位于所述第一极片送料机构和所述复合机构之间，所述第三纠偏机构用于调整所述第一极片、所述第一隔膜以及所述第二隔膜之间的相对位置；所述第四纠偏机构位于所述第一隔膜送料机构和所述复合机构之间，所述第四纠偏机构用于调整所述第一极片、所述第一隔膜以及所述第二隔膜之间的相对位置；所述第五纠偏机构位于所述第二隔膜送料机构和所述复合机构之间，所述第五纠偏机构用于调整所述第一极片和所述第一隔膜以及所述第二隔膜之间的相对位置。
- 根据权利要求1至8中任一项所述的电极组件的制造设备，所述制造设备还包括第一张力机构、第二张力机构和第三张力机构；所述第一张力机构设置于所述复合机构和所述卷绕机构之间，所述第一张力机构用于调整所述第一极片复合体的张紧程度；所述第二张力机构设置于所述第二极片送料机构和所述卷绕机构之间，所述第二张力机构用于调整所述第二极片的张紧程度；所述第三张力机构设置于所述第一极片送料机构和所述复合机构之间，所述第三张力机构用于调整所述第一极片的张紧程度。
- 根据权利要求1至9中任一项所述的电极组件的制造设备，其中，所述第一极片送料机构设置为两个，所述制造设备还包括设置于所述第一极片送料机构和所述复合机构之间的第一换卷机构，两个所述第一极片送料机构分别设置于所述第一换卷机构的两侧；和/或所述第二极片送料机构设置为两个，所述制造设备还包括设置于所述第二极片送料机构和所述卷绕机构之间的第二换卷机构，两个所述第二极片送料机构分别设置于所述第二换卷机构的两侧。
- 一种电极组件的制造方法，包括：提供第一隔膜、第一极片和第二隔膜；将所述第一隔膜、所述第一极片和所述第二隔膜依次层叠复合为第一极片复合体；提供第二极片；将所述第一极片复合体和所述第二极片一同卷绕形成电极组件，其中，所述第一极片和所述第二极片通过所述第一隔膜和所述第二隔膜隔离设置。
- 根据权利要求11所述的制造方法，还包括：将所述第二极片和所述第一极片复合体输送至卷绕工位并卷绕后，将所述第二极片切断和所述第一极片复合体切断。。
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| KR20160097915A (ko) * | 2015-02-10 | 2016-08-18 | 주식회사 디에이테크놀로지 | 이차 전지용 전극필름 권취장치 |
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| JP2015135734A (ja) * | 2014-01-16 | 2015-07-27 | 株式会社Ｇｓユアサ | 蓄電素子 |
| KR20160097915A (ko) * | 2015-02-10 | 2016-08-18 | 주식회사 디에이테크놀로지 | 이차 전지용 전극필름 권취장치 |
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