CN115513602B - Manufacturing process of power battery containing interface management layer structure electrode - Google Patents
Manufacturing process of power battery containing interface management layer structure electrode Download PDFInfo
- Publication number
- CN115513602B CN115513602B CN202211290286.2A CN202211290286A CN115513602B CN 115513602 B CN115513602 B CN 115513602B CN 202211290286 A CN202211290286 A CN 202211290286A CN 115513602 B CN115513602 B CN 115513602B
- Authority
- CN
- China
- Prior art keywords
- management layer
- interface management
- positive electrode
- anode
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 32
- 229920000642 polymer Polymers 0.000 claims abstract description 32
- 239000012530 fluid Substances 0.000 claims abstract description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 14
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 238000013329 compounding Methods 0.000 claims abstract description 12
- 239000011248 coating agent Substances 0.000 claims abstract description 11
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 239000006256 anode slurry Substances 0.000 claims abstract description 7
- 239000006257 cathode slurry Substances 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 60
- 239000006258 conductive agent Substances 0.000 claims description 22
- 229920001940 conductive polymer Polymers 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 17
- 239000007774 positive electrode material Substances 0.000 claims description 10
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 239000007773 negative electrode material Substances 0.000 claims description 9
- 239000006183 anode active material Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 6
- 239000006182 cathode active material Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 239000011884 anode binding agent Substances 0.000 claims description 4
- 239000011883 electrode binding agent Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000004760 aramid Substances 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 229920005569 poly(vinylidene fluoride-co-hexafluoropropylene) Polymers 0.000 claims description 3
- 239000007784 solid electrolyte Substances 0.000 claims description 3
- 239000012528 membrane Substances 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- 239000006230 acetylene black Substances 0.000 description 4
- 239000002041 carbon nanotube Substances 0.000 description 4
- 229910021393 carbon nanotube Inorganic materials 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 3
- 239000011149 active material Substances 0.000 description 3
- 239000002134 carbon nanofiber Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003273 ketjen black Substances 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- -1 LLZO Chemical compound 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000003013 cathode binding agent Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical compound [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000009823 thermal lamination Methods 0.000 description 2
- 229910020717 Li0.33La0.56TiO3 Inorganic materials 0.000 description 1
- 101001001642 Xenopus laevis Serine/threonine-protein kinase pim-3 Proteins 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001593 boehmite Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 239000002931 mesocarbon microbead Substances 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006112 polar polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001251 solid state electrolyte alloy Inorganic materials 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
Classifications
-
- 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
- H01M50/403—Manufacturing processes of separators, membranes or diaphragms
-
- 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
- H01M50/457—Separators, membranes or diaphragms characterised by the material having a layered structure comprising three or more layers
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The application relates to a power battery manufacturing process of an electrode with an interface management layer structure, which comprises the following steps: manufacturing an anode high molecular interface management layer film; manufacturing a negative electrode high molecular interface management layer film; coating a cathode slurry on one side of a cathode polymer interface management layer film to prepare a cathode film; coating one side of anode slurry on a cathode polymer interface management layer film to prepare a cathode film; thermally compounding the positive electrode film, the positive electrode fluid aluminum net and the other positive electrode film into a positive electrode unit; thermally compounding the anode film, the anode fluid copper net and the other anode film into an anode unit; a plurality of positive electrode units and negative electrode units are stacked together in a staggered and reverse mode to form a battery cell; the stacked and integrated battery cells are encapsulated and thermally flattened, so that all interfaces of the battery cells are fused and solidified at high degree, the problem that all interfaces of the battery cells are separated easily when the battery is charged and discharged is solved, the technical condition of the battery cells is provided for manufacturing large-size batteries, and the battery manufactured by using the battery cells is higher in energy density and safer in performance.
Description
[ field of technology ]
The application relates to a power battery manufacturing process of an electrode with an interface management layer structure, and belongs to the technical field of power batteries.
[ background Art ]
Among the power cells, there are conventionally three types of pouch cells, square case cells and cylindrical cells. The thickness of the soft package battery can be reduced to 5mm-12mm. Rather than conventional batteries, such as blade batteries. The utility model adopts the traditional aluminum hull package, and length direction is about 1000mm, width direction is about 120mm, thickness is about 10mm, and the outward appearance is rectangular shape, form blade. Because the blade battery has high monomer specific energy, good heat dissipation effect and high space utilization rate, the blade battery is applied to more and more markets in a discharge mode with high specific energy and high multiplying power.
However, in the prior art, the size of the blade battery is limited by the process of the battery core, and the large-size battery core is easy to bend in the production process in the existing structure and production mode, so that the interface layer is damaged, and therefore, the blade battery cannot have any large size in the width direction. However, other traditional batteries can only achieve the size of A4 paper, the thickness is generally 9mm-15mm, and the requirements of the market on large-size power batteries cannot be met.
Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art.
[ invention ]
The invention aims to provide a power battery manufacturing process of an electrode with an interface management layer structure, which is suitable for a large-size ultrathin square sheet-shaped polymer power battery.
The purpose of the application is realized through the following technical scheme: the power battery manufacturing process of the electrode with the interface management layer structure is suitable for preparing the battery core of the large-size ultrathin square sheet-shaped polymer power battery, and comprises the following steps:
manufacturing an anode polymer interface management layer film comprising a first nonpolar diaphragm and first anode conductive polymer interface management layer films positioned on two sides of the first nonpolar diaphragm;
manufacturing a negative electrode polymer interface management layer film comprising a second nonpolar diaphragm and second negative electrode conductive polymer interface management layer films positioned on two sides of the second nonpolar diaphragm;
coating a cathode slurry prepared from a cathode active material, a cathode adhesive and a cathode conductive agent on one side of the cathode polymer interface management layer film to prepare a cathode film;
coating an anode slurry prepared from an anode active material, an anode adhesive and an anode conductive agent on one side of the anode polymer interface management layer film to prepare an anode film;
a positive electrode unit roll is formed by hot-combined pressing of one side, coated with the positive electrode active material, of the positive electrode film, a positive electrode fluid aluminum net and the other side, coated with the positive electrode active material, of the positive electrode film, and then a tab is cut to prepare a positive electrode unit;
pressing the side of the negative electrode film with the negative electrode active material, a negative electrode fluid copper net and the other side of the negative electrode film with the negative electrode active material into a negative electrode unit roll by thermal compounding, and then cutting a tab to prepare a negative electrode unit;
the positive electrode units and the negative electrode units are stacked together in a staggered and reverse mode through a mechanical arm grabbing piece of a lamination machine to form a battery cell;
and encapsulating and hot-pressing the stacked and integrated battery cells.
Further, the first nonpolar membrane and the second nonpolar membrane are made of at least one of PE, PP, PET, PEO, PAN, PA, PI and aramid.
Further, the positive electrode unit roll sequentially passes through a first heating zone, a second heating zone and a third heating zone in the thermal composite lamination process;
the temperature of the first heating zone is 60-90 ℃, the temperature of the second heating zone is 90-110 ℃, and the temperature of the third heating zone is 110-120 ℃.
Further, the composition ratio of the positive electrode active material, the positive electrode conductive agent, and the positive electrode binder in the positive electrode film is 94:4:2.
further, the thickness of the positive electrode fluid aluminum net is 0.01 mm-0.015 mm.
Further, the negative electrode unit roll sequentially passes through a fourth heating zone, a fifth heating zone and a sixth heating zone in the thermal composite pressing process;
the temperature of the fourth heating zone is 90-110 ℃, the temperature of the fifth heating zone is 110-125 ℃, and the temperature of the sixth heating zone is 125-130 ℃.
Further, the composition ratio of the anode active material, the anode conductive agent, and the anode binder in the anode film is 95:3:2.
further, the thickness of the anode fluid copper net is 0.06 mm-0.015 mm.
Further, positive electrode press rolls are arranged on the third heating area, two positive electrode press rolls are arranged, a first gap for the positive electrode unit roll to pass through is formed between the two positive electrode press rolls, and the temperature of the positive electrode press rolls is 110-120 ℃;
the negative electrode press rollers are arranged on the sixth heating area, two negative electrode press rollers are arranged, a second gap for the negative electrode unit to pass through is formed between the two negative electrode press rollers, and the temperature of the negative electrode press rollers is 125-130 ℃.
Further, when the electric core is subjected to hot leveling, the electric core sequentially passes through a seventh heating zone, an eighth heating zone and a ninth heating zone;
the temperature of the seventh heating zone is 80-100 ℃, the temperature of the eighth heating zone is 100-120 ℃, and the temperature of the ninth heating zone is 120-140 ℃.
Compared with the prior art, the application has the following beneficial effects: the polymer polymerization and adhesion reaction is generated between the anode polymer interface management layer film and the cathode polymer interface management layer film, so that the whole cell is thermally cured to form a flat plate-shaped whole with mechanical strength and rigidity, and the interface layer of the whole cell is stable in performance. The battery cell has the advantages that the interfaces of the battery cells are fused and solidified at high degree, interface falling is not easy to occur, the problem that the interfaces of the battery cells are separated when the battery is charged and discharged is not easy to occur, the technical condition of the battery cells is provided for manufacturing large-size batteries, and the battery manufactured by using the battery cells has higher energy density and safer performance.
[ description of the drawings ]
Fig. 1 is a schematic flow chart of a power battery manufacturing process including an electrode with an interface management layer structure in an embodiment.
Fig. 2 is a schematic structural diagram of the battery cell in the embodiment shown in fig. 1.
Reference numerals illustrate:
1-positive electrode unit, 11-positive electrode polymer interface management layer film, 111-first positive electrode conductive polymer interface management layer film, 112-first nonpolar diaphragm, 113-positive electrode active material;
2-negative electrode unit, 21-negative electrode polymer interface management layer film, 211-second nonpolar diaphragm, 212-second negative electrode conductive polymer interface management layer film and 213-negative electrode active material.
[ detailed description ] of the invention
In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not limiting. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Referring to fig. 1 to 2, an embodiment of the present application discloses a process for manufacturing a power battery with an electrode having an interface management layer structure, which is suitable for manufacturing a battery core of a large-size ultrathin square sheet-shaped polymer power battery, and includes:
s1: manufacturing a positive electrode polymer interface management layer film 11 comprising a first nonpolar membrane 112 and first positive electrode conductive polymer interface management layer films 111 positioned on two sides of the first nonpolar membrane 112:
specifically, a first nonpolar membrane 112 is prepared, the first nonpolar membrane 1125 is made of at least one component of PE, PP, PET, PEO, PAN, PA, PI and aramid fiber, in this embodiment, the first nonpolar membrane 112 is made of PE, the first anode conductive polymer slurry is coated on two sides of the first nonpolar membrane 112 to form a first anode conductive polymer interface management layer 111, the first anode conductive polymer interface management layer 111 is composed of PVDF-HFP, a solid electrolyte, a third binder, a third conductive agent and a nano-oxide, and the third binder is PVDF, which is a polar polymer skeleton phase; PVDF-HFP is a polar amorphous phase conductive polymer group, which exists in a continuous state on the surface of the first nonpolar separator 112 and in the micropores of the adhesive. Solid state electrolytes include, but are not limited to, boehmite, LLZO, lithium fluoride intercalated PIM-1, li0.33la0.56tio3, and the like. The solid electrolyte exists in a continuous state on the surface and within the micropores of the first nonpolar separator 112. Wherein, the third conductive agent comprises any one of VFCF, SPUER-Li, S-O, KS-6, KS-15, SFG-6, SFG-15, 350G, acetylene Black (AB), ketjen Black (KB), vapor Grown Carbon Fiber (VGCF) and Carbon Nano Tube (CNT), and the VFCF can be modified or introduced with other ions, such as fluoride ions introduced on the surface of the VGCF, so that the VFCF has better compatibility with active materials and polar fluids through chemical reaction. SPUER-Li can be replaced with ECP, acetylene black, carbon nanotubes, ks-6, etc.; or alternatively, more than two of the third conductive agents are selected.
In this embodiment, the thickness of the first nonpolar separator 112 is 0.005mm, the coating thickness of the first cathode conductive polymer paste is 0.0015mm, and the thickness of the cathode polymer interface management layer 11 is 0.008mm.
S2: manufacturing a negative electrode polymer interface management layer 21 comprising a second nonpolar membrane 211 and second negative electrode conductive polymer interface management layers 212 positioned on both sides of the second nonpolar membrane 211:
a second nonpolar membrane 211 is prepared, the second nonpolar membrane 211 is made of at least one component of PE, PP, PET, PEO, PAN, PA, PI and aramid, and in this embodiment, the second nonpolar membrane 21116 is made of PE.
The second negative electrode conductive polymer slurry is coated on two sides of the second nonpolar diaphragm 211 to form a second negative electrode conductive polymer interface management layer film 212, and the second negative electrode conductive polymer interface management layer film 212 is composed of a fourth adhesive, a fourth conductive agent and a nano oxide. Wherein the fourth conductive agent includes but is not limited to any one of VFCF, SPUER-Li, conductive carbon black SP, ketjen black ECP, acetylene black, carbon nanotubes, SFG-6,
in this embodiment, the thickness of the second nonpolar separator 211 is 0.005mm, the coating thickness of the second cathode conductive polymer paste is 0.0015mm, and the thickness of the anode polymer interface management layer film 21 is 0.008mm.
S3: a cathode slurry made of a cathode active material 113, a cathode binder and a cathode conductive agent is coated on one side of the cathode polymer interface management layer film 11 to prepare a cathode film:
specifically, a cathode slurry containing the cathode active material 113, a cathode binder, and a cathode conductive agent is coated on one surface of the cathode polymer interface management layer film 11, and the cathode polymer interface management layer film 11 containing the cathode active material 113 is prepared.
Wherein, lithium iron phosphate LFP is selected as the positive electrode active material 113, conductive carbon black is selected as the positive electrode conductive agent, PVDF is selected as the positive electrode adhesive, and 94:4:2, preparing cathode slurry in NMP (N-methyl pyrrolidone), uniformly coating the cathode slurry on the positive electrode polymer interface management layer film 11 by a roller coating mode, and vacuum drying for 16 hours at 120 ℃ to prepare the positive electrode film.
S4: coating an anode slurry made of an anode active material 213, an anode binder and an anode conductive agent on one side of the anode polymer interface management layer film 21 to prepare an anode film;
the anode slurry containing the anode active material 213, the anode binder, and the anode conductive agent is coated on one surface of the anode polymer interface management layer film 21, and the anode polymer interface management layer film 21 containing the anode active material 213 is prepared.
Wherein, the negative electrode active material 213 is selected from mesophase carbon microsphere MCMB, the negative electrode conductive agent is selected from conductive carbon black, the negative electrode binder is selected from PVDF, and the negative electrode active material 213, the negative electrode conductive agent and the negative electrode binder are prepared from the following components in percentage by weight: 3:2, preparing anode slurry in NMP (N-methyl pyrrolidone), adopting a single-sided coating process, uniformly coating the anode slurry on one side of the anode polymer interface management layer film 21 in a roller coating mode, drying in vacuum at 120 ℃ for 16 hours, and then rolling into an anode film.
S5: a positive electrode unit roll is formed by combining the side of the positive electrode film coated with the positive electrode active material 113, a positive electrode fluid aluminum mesh and the other side of the positive electrode film coated with the positive electrode active material 113 through thermal compounding, and then a tab is cut to manufacture a positive electrode unit 1:
specifically, the positive electrode unit roll is formed by thermally laminating the three surfaces of the positive electrode film containing the positive electrode high molecular interface management layer film 11 and the positive electrode fluid aluminum net, and the other surface containing the positive electrode film containing the positive electrode high molecular interface management layer film 11 and the active material on a thermal lamination machine, and then cutting the tab and the positive electrode unit 1.
The anode high molecular interface management layer film 11, the anode fluid aluminum mesh and the other anode high molecular interface management layer film 11 sequentially pass through a first heating zone, a second heating zone and a third heating zone on the thermal compounding machine during thermal compounding, wherein in the embodiment, the temperature of the first heating zone is 60-90 ℃, the temperature of the second heating zone is 90-110 ℃, and the temperature of the third heating zone is 110-120 ℃. And the third heating area is provided with positive electrode press rolls, two positive electrode press rolls are arranged, a first gap for the positive electrode unit 1 to pass through is formed between the two positive electrode press rolls, and the temperature of the positive electrode press rolls is 110-120 ℃ so as to roll-coat and press the positive electrode unit rolls through the positive electrode press rolls.
The purpose of the positive electrode fluid aluminum net adopting the net structure is that the positive electrode films on two sides of the positive electrode fluid aluminum net can be better attached to the positive electrode fluid aluminum net through gaps of the net structure, so that the effect of thermal compounding is ensured.
In this example, the thickness of the positive electrode fluid aluminum mesh is 0.01mm to 0.015mm.
S6: and (2) pressing the side of the negative electrode film with the negative electrode active material 213, a negative electrode fluid copper net and the other side of the negative electrode film with the negative electrode active material 213 into a negative electrode unit roll by thermal compounding, and then cutting a tab to prepare a negative electrode unit 2:
the negative electrode unit roll is formed by thermally laminating the surface of the negative electrode film containing the negative electrode polymer interface management layer film 21 and the surface thereof containing the active material on a thermal lamination machine, and then cutting the tab and the negative electrode unit 2.
The anode high molecular interface management layer film 21, the anode electrode fluid copper net and the other anode high molecular interface management layer film 21 sequentially pass through a fourth heating zone, a fifth heating zone and a sixth heating zone on the thermal compounding machine during thermal compounding, in this embodiment, the temperature of the fourth heating zone is 90-110 ℃, the temperature of the fifth heating zone is 110-125 ℃, the temperature of the sixth heating zone is 125-130 ℃, anode press rolls are arranged in the sixth heating zone, two anode press rolls are arranged, a second gap for allowing anode unit rolls to pass through is formed between the two anode press rolls, and the temperature of the anode press rolls is 125-130 ℃ so as to roll-coat and press the anode unit rolls through the anode press rolls.
The purpose of adopting the net structure for the negative electrode fluid copper net is that the negative electrode films on two sides of the negative electrode fluid aluminum net can be better attached to the negative electrode fluid copper net through gaps of the net structure, so that the effect of thermal compounding is ensured.
In this embodiment, the thickness of the anode fluid copper mesh is 0.06mm to 0.015mm.
S7: and (3) stacking a plurality of positive electrode units 1 and negative electrode units 2 in a staggered and reverse direction through a mechanical arm grabbing piece of a lamination machine to form a battery cell.
S8: encapsulating and hot-pressing the stacked and integrated battery cells:
specifically, when the battery cell is hot flat pressed, the battery cell sequentially passes through the seventh heating zone, the eighth heating zone and the ninth heating zone. In this embodiment, the seventh heating zone temperature is 80 ℃ to 100 ℃, the eighth heating zone temperature is 100 ℃ to 120 ℃, and the ninth heating zone temperature is 120 ℃ to 140.
After hot flat pressing, the battery cell is subjected to primary activation, dried and then is put into an aluminum-plastic composite bag or a battery shell, and secondary activation and sealing are performed.
The foregoing is merely one specific embodiment of the present application and any other modifications made based on the concepts of the present application are contemplated as falling within the scope of the present application.
Claims (10)
1. The manufacturing process of the power battery with the interface management layer structure electrode is suitable for preparing the battery core of the large-size ultrathin square sheet-shaped polymer power battery, and is characterized by comprising the following steps of:
manufacturing an anode polymer interface management layer film comprising a first nonpolar diaphragm and first anode conductive polymer interface management layer films positioned on two sides of the first nonpolar diaphragm, wherein the first anode conductive polymer interface management layer film consists of PVDF-HFP, solid electrolyte, a third adhesive, a third conductive agent and nano oxides;
manufacturing a negative electrode polymer interface management layer film comprising a second nonpolar diaphragm and second negative electrode conductive polymer interface management layer films positioned on two sides of the second nonpolar diaphragm, wherein the second negative electrode conductive polymer interface management layer film consists of a fourth adhesive, a fourth conductive agent and nano oxides;
coating a cathode slurry prepared from a cathode active material, a cathode adhesive and a cathode conductive agent on one side of the cathode polymer interface management layer film to prepare a cathode film;
coating an anode slurry prepared from an anode active material, an anode adhesive and an anode conductive agent on one side of the anode polymer interface management layer film to prepare an anode film;
a positive electrode unit roll is formed by hot-combined pressing of one side, coated with the positive electrode active material, of the positive electrode film, a positive electrode fluid aluminum net and the other side, coated with the positive electrode active material, of the positive electrode film, and then a tab is cut to prepare a positive electrode unit;
pressing the side of the negative electrode film with the negative electrode active material, a negative electrode fluid copper net and the other side of the negative electrode film with the negative electrode active material into a negative electrode unit roll by thermal compounding, and then cutting a tab to prepare a negative electrode unit;
the positive electrode units and the negative electrode units are stacked together in a staggered and reverse mode through a mechanical arm grabbing piece of a lamination machine to form a battery cell;
and encapsulating and hot-pressing the stacked and integrated battery cells.
2. The process for manufacturing a power battery with an electrode having an interface management layer structure according to claim 1, wherein the first nonpolar separator and the second nonpolar separator are made of at least one of PE, PP, PET, PEO, PAN, PA, PI and aramid.
3. The process for manufacturing a power battery containing an electrode with an interface management layer structure according to claim 1, wherein the positive electrode unit roll sequentially passes through a first heating zone, a second heating zone and a third heating zone in the thermal composite lamination process;
the temperature of the first heating zone is 60-90 ℃, the temperature of the second heating zone is 90-110 ℃, and the temperature of the third heating zone is 110-120 ℃.
4. The process for manufacturing a power cell having an interface management layer structure electrode according to claim 3, wherein the composition ratio of the positive electrode active material, the positive electrode conductive agent, and the positive electrode binder in the positive electrode film is 94:4:2.
5. the process for manufacturing a power battery containing an electrode with an interface management layer structure according to claim 4, wherein the thickness of the positive electrode fluid aluminum mesh is 0.01-0.015 mm.
6. The process for manufacturing a power battery containing an electrode with an interface management layer structure according to claim 5, wherein the negative electrode unit roll sequentially passes through a fourth heating zone, a fifth heating zone and a sixth heating zone in the thermal composite lamination process;
the temperature of the fourth heating zone is 90-110 ℃, the temperature of the fifth heating zone is 110-125 ℃, and the temperature of the sixth heating zone is 125-130 ℃.
7. The process for manufacturing a power battery including an interface management layer structure electrode according to claim 6, wherein the composition ratio of the anode active material, the anode conductive agent, and the anode binder in the anode film is 95:3:2.
8. the process for manufacturing a power battery containing an electrode with an interface management layer structure according to claim 7, wherein the thickness of the negative electrode fluid copper net is 0.06-0.015 mm.
9. The process for manufacturing the power battery containing the interface management layer structure electrode according to claim 6, wherein the third heating area is provided with two positive electrode press rolls, a first gap for the positive electrode unit roll to pass through is formed between the two positive electrode press rolls, and the temperature of the positive electrode press rolls is 110-120 ℃;
the negative electrode press rollers are arranged on the sixth heating area, two negative electrode press rollers are arranged, a second gap for the negative electrode unit to pass through is formed between the two negative electrode press rollers, and the temperature of the negative electrode press rollers is 125-130 ℃.
10. The process for manufacturing a power battery containing an electrode with an interface management layer structure according to claim 6, wherein the battery cell sequentially passes through a seventh heating zone, an eighth heating zone and a ninth heating zone when the battery cell is subjected to hot platen press;
the temperature of the seventh heating zone is 80-100 ℃, the temperature of the eighth heating zone is 100-120 ℃, and the temperature of the ninth heating zone is 120-140 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211290286.2A CN115513602B (en) | 2022-10-21 | 2022-10-21 | Manufacturing process of power battery containing interface management layer structure electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211290286.2A CN115513602B (en) | 2022-10-21 | 2022-10-21 | Manufacturing process of power battery containing interface management layer structure electrode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115513602A CN115513602A (en) | 2022-12-23 |
| CN115513602B true CN115513602B (en) | 2024-01-26 |
Family
ID=84509688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211290286.2A Active CN115513602B (en) | 2022-10-21 | 2022-10-21 | Manufacturing process of power battery containing interface management layer structure electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115513602B (en) |
Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521069A (en) * | 1991-07-12 | 1993-01-29 | Sanyo Electric Co Ltd | Nonaqueous electrolytic battery and electrode therefor |
| EP1261046A1 (en) * | 2001-05-25 | 2002-11-27 | Microbatterie GmbH | Method of manufacturing an electrode/separator assembly for galvanic elements |
| CN101315993A (en) * | 2007-05-28 | 2008-12-03 | 东莞新能源电子科技有限公司 | Method for manufacturing stack type lithium ion battery |
| CN102460776A (en) * | 2009-05-26 | 2012-05-16 | 奥普图多特公司 | Batteries utilizing anode coatings directly on nanoporous separators |
| CN102544576A (en) * | 2012-02-21 | 2012-07-04 | 东莞新能源科技有限公司 | Lithium ion battery |
| JP2014137889A (en) * | 2013-01-16 | 2014-07-28 | Toyota Motor Corp | Lithium ion secondary battery and battery pack |
| CN104103791A (en) * | 2013-04-08 | 2014-10-15 | 中国科学院金属研究所 | Composite diaphragm for battery and preparation method thereof |
| CN104638213A (en) * | 2015-01-30 | 2015-05-20 | 湖南高远电池有限公司 | Ultrathin secondary battery and preparation method thereof |
| WO2016168715A1 (en) * | 2015-04-15 | 2016-10-20 | Optodot Corporation | Coated stacks for batteries and related manufacturing methods |
| CN106784990A (en) * | 2016-12-02 | 2017-05-31 | 国联汽车动力电池研究院有限责任公司 | A kind of long circulating nonaqueous electrolyte battery and preparation method thereof |
| CN107819153A (en) * | 2016-09-12 | 2018-03-20 | 中国科学院金属研究所 | A kind of new structure lithium ion battery and preparation method thereof |
| CN110323392A (en) * | 2018-03-30 | 2019-10-11 | 北京国能电池科技股份有限公司 | Rechargeable battery and preparation method thereof and electrical equipment |
| CN110323075A (en) * | 2018-03-30 | 2019-10-11 | 北京国能电池科技股份有限公司 | Diaphragm/electrode composite construction and preparation method thereof, purposes and supercapacitor |
| CN212136623U (en) * | 2020-04-09 | 2020-12-11 | 恒大新能源技术(深圳)有限公司 | Battery cell structure and lithium ion battery |
| CN114006050A (en) * | 2021-09-29 | 2022-02-01 | 林丰川 | Ultra-thin polymer lithium ion battery and preparation method thereof |
| CN114243219A (en) * | 2021-11-11 | 2022-03-25 | 成都市银隆新能源有限公司 | Multifunctional composite diaphragm and preparation method thereof |
| CN114284563A (en) * | 2021-12-02 | 2022-04-05 | 荣盛盟固利新能源科技股份有限公司 | High-safety semi-solid lithium ion battery and manufacturing method thereof |
| CN114530670A (en) * | 2022-01-17 | 2022-05-24 | 惠州锂威新能源科技有限公司 | Battery cell structure and secondary battery |
| CN114552130A (en) * | 2021-09-13 | 2022-05-27 | 万向一二三股份公司 | Pole piece structure for improving lithium ion battery thermal compounding process infiltration |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060105244A1 (en) * | 2002-06-08 | 2006-05-18 | Kejha Joseph B | Lithium based electrochemical devices having a ceramic separator glued therein by an ion conductive adhesive |
| JP5858325B2 (en) * | 2010-09-03 | 2016-02-10 | 株式会社Ｇｓユアサ | battery |
-
2022
- 2022-10-21 CN CN202211290286.2A patent/CN115513602B/en active Active
Patent Citations (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0521069A (en) * | 1991-07-12 | 1993-01-29 | Sanyo Electric Co Ltd | Nonaqueous electrolytic battery and electrode therefor |
| EP1261046A1 (en) * | 2001-05-25 | 2002-11-27 | Microbatterie GmbH | Method of manufacturing an electrode/separator assembly for galvanic elements |
| CN101315993A (en) * | 2007-05-28 | 2008-12-03 | 东莞新能源电子科技有限公司 | Method for manufacturing stack type lithium ion battery |
| CN102460776A (en) * | 2009-05-26 | 2012-05-16 | 奥普图多特公司 | Batteries utilizing anode coatings directly on nanoporous separators |
| CN102544576A (en) * | 2012-02-21 | 2012-07-04 | 东莞新能源科技有限公司 | Lithium ion battery |
| JP2014137889A (en) * | 2013-01-16 | 2014-07-28 | Toyota Motor Corp | Lithium ion secondary battery and battery pack |
| CN104103791A (en) * | 2013-04-08 | 2014-10-15 | 中国科学院金属研究所 | Composite diaphragm for battery and preparation method thereof |
| CN104638213A (en) * | 2015-01-30 | 2015-05-20 | 湖南高远电池有限公司 | Ultrathin secondary battery and preparation method thereof |
| WO2016168715A1 (en) * | 2015-04-15 | 2016-10-20 | Optodot Corporation | Coated stacks for batteries and related manufacturing methods |
| CN107819153A (en) * | 2016-09-12 | 2018-03-20 | 中国科学院金属研究所 | A kind of new structure lithium ion battery and preparation method thereof |
| CN106784990A (en) * | 2016-12-02 | 2017-05-31 | 国联汽车动力电池研究院有限责任公司 | A kind of long circulating nonaqueous electrolyte battery and preparation method thereof |
| CN110323392A (en) * | 2018-03-30 | 2019-10-11 | 北京国能电池科技股份有限公司 | Rechargeable battery and preparation method thereof and electrical equipment |
| CN110323075A (en) * | 2018-03-30 | 2019-10-11 | 北京国能电池科技股份有限公司 | Diaphragm/electrode composite construction and preparation method thereof, purposes and supercapacitor |
| CN212136623U (en) * | 2020-04-09 | 2020-12-11 | 恒大新能源技术(深圳)有限公司 | Battery cell structure and lithium ion battery |
| CN114552130A (en) * | 2021-09-13 | 2022-05-27 | 万向一二三股份公司 | Pole piece structure for improving lithium ion battery thermal compounding process infiltration |
| CN114006050A (en) * | 2021-09-29 | 2022-02-01 | 林丰川 | Ultra-thin polymer lithium ion battery and preparation method thereof |
| CN114243219A (en) * | 2021-11-11 | 2022-03-25 | 成都市银隆新能源有限公司 | Multifunctional composite diaphragm and preparation method thereof |
| CN114284563A (en) * | 2021-12-02 | 2022-04-05 | 荣盛盟固利新能源科技股份有限公司 | High-safety semi-solid lithium ion battery and manufacturing method thereof |
| CN114530670A (en) * | 2022-01-17 | 2022-05-24 | 惠州锂威新能源科技有限公司 | Battery cell structure and secondary battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115513602A (en) | 2022-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106797046B (en) | Laminated battery and method for manufacturing the same | |
| US8821593B2 (en) | Method for manufacturing electrode for electrochemical element | |
| JP5382130B2 (en) | Method for producing solid electrolyte battery | |
| US9312527B2 (en) | Separator having heat resistant insulation layers | |
| CN101276899B (en) | Anode and lithium-ion secondary battery | |
| CN110649266A (en) | Lithium ion battery based on carbon nanotube film and preparation method thereof | |
| JP5601361B2 (en) | Battery electrode | |
| CN110931802B (en) | Preparation method and application of flexible light non-metal current collector and pole piece, lithium storage battery and preparation method thereof | |
| CN113611916A (en) | Laminated battery cell and preparation method thereof | |
| CN115714163B (en) | Pre-lithium negative plate, preparation method thereof, pre-lithium battery core and lithium ion battery | |
| CN110718676A (en) | Lithium ion battery positive pole piece, preparation method thereof and lithium ion battery | |
| CN112786890A (en) | Solid-state battery with low interface impedance and preparation method thereof | |
| CN111786040A (en) | Pole piece, application thereof and low-temperature-rise long-life lithium ion battery containing pole piece | |
| JP2010199022A (en) | Method of manufacturing electrode for secondary battery, electrode for secondary battery, and secondary battery | |
| CN102013528A (en) | Improved lithium ion battery manufacture process | |
| CN115513602B (en) | Manufacturing process of power battery containing interface management layer structure electrode | |
| CN114447262B (en) | Pole piece, coating device, battery cell, battery pack and manufacturing method of battery cell | |
| CN112670592A (en) | Pole piece and diaphragm compounding process and lithium battery cell preparation process | |
| WO2019198495A1 (en) | Battery production method | |
| TW201526354A (en) | Lithium ion secondary battery and method for producing lithium ion secondary battery | |
| JP7510749B2 (en) | How lithium-ion batteries are manufactured | |
| CN212161973U (en) | Electrode sheet and secondary battery | |
| CN113948710A (en) | Positive current collector, positive plate and lithium ion battery | |
| JP2013073855A (en) | Method of manufacturing multilayer membrane electrode assembly, method of manufacturing lithium ion secondary battery and lithium ion secondary battery | |
| WO2022173004A1 (en) | Manufacturing method and manufacturing device for lithium ion battery members |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |