SE2251198A1 - Overlapping edge coating comprising polyvinyl butyralin in an electrode roll, and a cylindrical secondary cell - Google Patents
Overlapping edge coating comprising polyvinyl butyralin in an electrode roll, and a cylindrical secondary cellInfo
- Publication number
- SE2251198A1 SE2251198A1 SE2251198A SE2251198A SE2251198A1 SE 2251198 A1 SE2251198 A1 SE 2251198A1 SE 2251198 A SE2251198 A SE 2251198A SE 2251198 A SE2251198 A SE 2251198A SE 2251198 A1 SE2251198 A1 SE 2251198A1
- Authority
- SE
- Sweden
- Prior art keywords
- electrode assembly
- range
- electrode
- conductive substrate
- edge coating
- Prior art date
Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 62
- 238000000576 coating method Methods 0.000 title claims abstract description 62
- 229920002554 vinyl polymer Polymers 0.000 title 1
- 239000000758 substrate Substances 0.000 claims abstract description 40
- 239000011247 coating layer Substances 0.000 claims abstract description 28
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical group [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 18
- -1 metal oxide hydroxide Chemical class 0.000 claims description 12
- 229910044991 metal oxide Inorganic materials 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 10
- 239000002033 PVDF binder Substances 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 7
- 239000010410 layer Substances 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 5
- 229920006168 hydrated nitrile rubber Polymers 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 239000004642 Polyimide Substances 0.000 claims description 4
- VXAUWWUXCIMFIM-UHFFFAOYSA-M aluminum;oxygen(2-);hydroxide Chemical group [OH-].[O-2].[Al+3] VXAUWWUXCIMFIM-UHFFFAOYSA-M 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910000000 metal hydroxide Inorganic materials 0.000 claims description 3
- 150000004692 metal hydroxides Chemical class 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 claims description 2
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N Butyraldehyde Chemical compound CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 claims description 2
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical class C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims description 2
- 239000005060 rubber Substances 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- 229910052726 zirconium Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 description 28
- 239000011888 foil Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical group O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910001593 boehmite Inorganic materials 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 150000004679 hydroxides Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- VSZWPYCFIRKVQL-UHFFFAOYSA-N selanylidenegallium;selenium Chemical compound [Se].[Se]=[Ga].[Se]=[Ga] VSZWPYCFIRKVQL-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N phthalic anhydride Chemical compound C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 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
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
- H01M50/414—Synthetic resins, e.g. thermoplastics or thermosetting resins
- H01M50/417—Polyolefins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D129/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Coating compositions based on hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Coating compositions based on derivatives of such polymers
- C09D129/10—Homopolymers or copolymers of unsaturated ethers
-
- 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
- H01M10/0422—Cells or battery with cylindrical casing
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
An electrode assembly (10) for a secondary battery cell, the electrode assembly comprising: a conductive substrate (1); an electrode coating (2, 2’) provided on at least one side of the conductive substrate (1); wherein the electrode coating (2, 2’) is at least partially coated on the conductive substrate (1), whereby said conductive substrate (1) exhibits uncoated portions (4) and coated portions (2, 2’), and wherein an edge coating layer (3) is arranged to cover at least a portion of an interface (5) between said uncoated conductive substrate (4) portion and the electrode coating (2, 2’), wherein the edge coating layer comprises at least 55 wt-% polyvinyl butyral.
Description
TECHNICAL FIELD The present disclosure generally pertains to an edge coating for secondary cells, and more particularly to an electrode roll and a cylindrical secondary cell comprising such and electrode roll.
BACKGROUND In addressing climate change, there is an increasing demand for rechargeable batteries, e.g. to enable electrif1cation of transportation and to supplement renewable energy. Such batteries typically comprise a number of cells, often referred to as secondary cells.
In battery manufacturing it is known in the art to provide an electrically conductive sheet with a coating that is rolled up into a cylinder. In so called tabless cells, the electrically conductive sheet has an uncoated edge protruding on a side of the cylinder. The edge may be folded to provide an electrical contact surface.
The stability of a battery deterrnines the longevity of the battery and the limits of energy that the battery stores, and how fast the device can charge or supply energy. Defects in the battery may also cause complete failure of battery Such aS Electrical short, rapid discharge, and subsequent fires.
Conventionally each of the cathode and anode electrodes uses small metallic components called "tabs" to connect to the positive and negative terrninals of the battery can. Tabs are metallic components which are welded onto the electrodes. Tab manufacturing presents many challenges which may affect both the reliability and performance of the battery. The welding operation may for instance cause welding burrs to penetrate the separator layer between the positive and negative electrodes and therefore cause an intemal short circuit. The charge and discharge current flow through the tabs and significantly increase the temperature of the region around the tab to a level much higher than other parts of the battery, and there is thus a need to be able to insulate the interface between the tabs and the electrodes. Large-forrnat lithium-ion cells have a "foil-to-tab" weld to collect the foils inside a cell and join them to a tab.
However, the electrode-roll may also be a part of a so-called tabless battery, or a tabless lithium-ion battery. In a tabless battery the conventional tab functionality is replaced with a conductive portion or strip that runs along the length of the electrode. In the tabless design, the maximum distance that electrons should travel is the height of the electrode rather than its length as in the case of a conventional electrode with tabs. Since the height of an electrode is only 5-20% of its length, the ohmic resistance and the heat that is generated is reduced.
Further, in the tabless design, the whole edge of the electrode is responsible for current (and heat) transfer, and the anode and cathode sheets are designed to form a rose-like form at the ends when they have been rolled up. The ends must, however be flattened to fit into the can, however separator alone might not be sufficient for insulation. During welding of aluminum disc and foils, particles can be generated and positioned between aluminum foil and separator or separator and anode, and this may cause malfunction of the electrical cell.
As the demand for rechargeable batteries increases, more and more focus is also being placed on production speed. To achieve an effective production of rechargeable batteries, the design of the batteries can be optimized with fewer defects compromising the performance of the battery cell. SUMMARY It is in view of the above considerations and others that the embodiments of the present invention have been made. The present disclosure aims at providing highly performance secondary cells that are efficient in manufacture.
According to a first aspect, the present disclosure provides an electrode assembly for a secondary battery cell, the electrode assembly comprising: a conductive substrate; an electrode coating provided on at least one side of the conductive substrate; wherein the electrode coating is at least partially coated on the conductive substrate, whereby said conductive substrate exhibits uncoated portions and coated portions, and wherein an edge coating layer is arranged to cover at least a portion or part of an interface between said uncoated conductive substrate portion and the electrode coating, wherein the edge coating layer comprises at least 55 wt-% polyvinyl butyral.
The interface may thus be any edge where the coating material layer of either the cathode or anode has an "open" boarder or interface to or with the conductive substrate or foil material. 2 The foil material may be for instance copper or aluminium foil onto which the respective anode or cathode is coated.
The edge coating material must be able to withstand high voltages ("high voltage stability"), i.e. be electrically insulating as well as preferably therrnally insulating.
It has surprisingly been found that an edge coating comprising Polyvinyl butyral has numerous advantages in that is exhibits a good stability during application of high voltages, very good electric insulation, and good compatibility with inorganic material. The edge coating layer may have a thickness in the range of l to 55 um.
The electrode coating may be provided on said conductive substrate such that the uncoated conductive substrate portion is arranged along a longitudinal edge of the electrode assembly.
The electrode coating may be provided on said conductive substrate such that the uncoated conductive substrate portion is arranged across a width of electrode assembly, and such that the uncoated conductive substrate portion is surrounded by the electrode coating on both sides.
This coating may also be referred to as interrnittent coating, which means that there is a gap of uncoated substrate between two portions of electrode coating.
According to the f1rst aspect the edge coating layer or material further may comprise any one of a metal oxide, a metal hydroxide and a metal oxide hydroxide, or a combination thereof, in the range of l to 20 wt-%. The metal may be any one of aluminium (Al), zirconium (Zr), titanium (Ti) and silicon (Si).
According to one preferred altemative a metal oxide may be aluminium oxide. According to another preferred altemative a metal oxide hydroxide is aluminium hydroxide oxide (boehmite).
The edge coating layer may further comprise a polymer in the range of l to 20 wt-%. Said polymer may be selected from the group consisting of poly(methyl methacrylate).
The edge coating layer may further comprise polyvinylidene fluoride (PVDF) in a range of 0 to 45 wt-%.
According to an alternative of the first aspect the edge coating layer may further comprise hydrogenated acrylonitrile butadiene (HNBR) rubber in a range of 0 to 45 wt-%. The edge coating layer may further comprise polyimide in a range of 0 to 45 wt-%.
According to an alternative of the first aspect the edge coating layer may further comprise polyisobutane in a range of 0 to 45 wt-%.
The edge coating layer may further comprise polyvinyl butyral in a range of 80 to 89 wt-% and aluminium oxide in a range of 11 to 20 wt-%, aluminium oxide hydroxide in a range of 11 to wt-%, and a polymer in a range of 11 to 20 wt-%, or a combination thereof.
According to the first aspect the edge coating layer may be arranged at an interface between a negative electrode coating and said substrate.
According to a second aspect, the present disclosure provides secondary battery cell comprising the electrode assembly according the first aspect.
According to a third aspect, the present disclosure provides use of a secondary battery cell according to the second aspect, in an electrical vehicle. BRIEF DESCRIPTION OF THE DRAWINGS The embodiments disclosed herein are illustrated by way of example, and by not by way of limitation, in the figures of the accompanying drawings. Like reference numerals refer to corresponding parts throughout the drawings.
Fig. 1 schematically shows a cross-sectional view of a conductive substrate material provided with a coating according to the invention.
DETAILED DESCRIPTION Embodiments of the present disclosure will now be described more fully hereinafter. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those persons skilled in the art.
Figure 1 illustrates a first embodiment of a conductive substrate material 1 coated with an electrode coating material 2, 2". Said electrode coating material may be one of a cathode (negative electrode) or anode (positive electrode) material 2, 2" for a secondary battery cell. The conductive substrate material 1 may be a metal foil, such as a copper foil or aluminium foil.
The secondary battery cell may be an electrode-roll or cylindrical secondary cell, and may be for, or comprised in a vehicle battery or battery pack for propelling a vehicle. The vehicle may for example be a fully electrically propelled vehicle or a hybrid vehicle.
In a cylindrical battery cell, such as a lithium-ion cell, sheet-like anodes, separators and cathodes are sandwiched and rolled into a cylinder shaped can.
The electrode coating material 2, 2" may be provided onto said conductive substrate material 1 such that an entire long edge portion, or longitudinal edge portion, of the conductive substrate is left uncoated.
Further, the electrode coating material may be provided onto the conductive substrate such that there is a gap of uncoated conductive substrate 4 between two portions of electrode coating 2, 2". This is often referred to as interrnittent coating.
The edge coating layer 3 may thus be applied or coated at any interface portion 5 or junction between the electrode coating, being either negative electrode or positive electrode coating, and the uncoated conducting substrate material. This means that the edge coating may be applied to at least partially cover or overlap, OL, any interface, gap or junction between a cathode layer, an anode layer and a welded tab and the conductive substrate material. This way the edge coating 3 may electrically, and therrnally, insulate a gap between the coating and the substrate, or the tab and the substrate or coating.
The thickness T of the edge coating 3 is preferably lower than the pressed thickness, TS, of the cathode material layer 2, 2", which may be in the range 55 to 85 um. This means that the thickness T of the edge coating is preferably less than 65 um.
The width W of the edge coating layer 3 is preferably in a range of 0.5 to 3 mm.
A Width OL of the overlap/ gap 5 between the cathode material coating and the insulating edge coating is preferably kept below 0.5 mm.
The edge coating may have insulation resistance higher than 1 MQ. The edge coating layer 3 may further be applied With uniforrn or Varying thickness. By Varying thickness is for instance meant that the ends of the applied edge coating layer may be thinner than a central portion.
The edge coating preferably comprises at least one component, compound or material Which exhibits a high electrical Voltage stability, electrical insulation, and also therrnal insulation. By high electrical Voltage stability is meant V Vs Li/Li+ in the range of 2.5 to 5.
In a preferred embodiment, the edge coating layer or material comprises polyVinyl butyral, CAS No. 915977-69-4, having the molecular forrnula (CgH14O2)n. The edge coating material preferably comprises at least 55 Wt-% polyyinyl butyral or in the range of 55 Wt-% to 100 Wt-%, or more preferably in a range from 80 to 89 Wt-%.
In altemative embodiments, the composition of the edge coating material contains or comprises polyVinyl butyral and additional compounds or materials.
It is to be understood that the edge coating may comprise polyVinyl butyral and any one or a combination of these compounds and materials.
In one embodiment, the edge coating material further comprises at least one metal oxide in the range of 1 to 20 Wt-%.
In one embodiment the edge coating material further comprises at least one metal hydroxide in the range of 1 to 20 Wt-%.
In one embodiment the edge coating material further comprises at least one oxide hydroxide metal in the range of 1 to 20 Wt-%.
The metal in any one of the above-mentioned oxides, hydroxides and oxide hydroxides may be selected from the group consisting of aluminium (Al), zirconium (Zr), titanium (Ti) and silicon (Si). In a more preferred embodiment, the metal oxide is aluminium oxide. 6 In one embodiment, the metal oxide hydroxide is aluminium oxide hydroxide, CAS 1318-23- 6).
In one embodiment, the edge coating material further comprises at least one polymer in the range of 1 to 20 Wt-%. The polymer may be selected from the group of consisting of poly(methyl methacrylate).
In one embodiment the edge coating material further comprises polyvinylidene fluoride (PVDF) or poly(1,1-difluoroethylene) (CAS No. 24937-79-9) having the molecular forrnula of -(C2H2F2)n-. The edge coating preferably comprises PVDF in a range of 0 to 45 Wt-%.
In an altemative embodiment the edge coating material further comprises hydrogenated acrylonitrile butadiene rubber, ASTM D1418 Designation HNBR, HSN, CAS No. 308068-83- 9 and having a chemical forrnula of: The edge coating preferably comprises HNBR in a range of 0 to 45 Wt-%.
In yet an altemative embodiment the edge coating comprises polyimide (1,3- Isobenzofurandione, 5 ,5 '-carbonylbis-, polymers With 2,4-diisocyanato-1 - methylbenzene), CAS No. 58698-66-1, having the molecular forrnula: C41H2zN4O11. The edge coating preferably comprises polyimide in a range of 0 to 45 Wt-%.
In yet an altemative embodiment the edge coating comprises the edge coating layer 3 comprises polyisobutane, CAS No. 9003-27-4, having the molecular forrnula (C4Hg)n in a range of 0 to 45 Wt-%.
In a more preferred embodiment, the edge coating comprises polyvinyl butyral in a range of in a range of 80 to 89 Wt-% and any one of aluminium oxide in a range of 11 to 20 Wt-%, a n aluminium oxide hydroxide (boehmite) in a range of 11 to 20 Wt-%, and a polymer in a range of 11 to 20 Wt-%, or a combination thereof Modifications and other variants of the described embodiments Will come to mind to ones skilled in the art having benefit of the teachings presented in the foregoing description and associated drawings. Therefore, it is to be understood that the embodiments are not limited to the specific example embodiments described in this disclosure and that modifications and other variants are intended to be included Within the scope of this disclosure.
Furthermore, although specific terms may be employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. Therefore, persons skilled in the art Would recognize numerous Variations to the described embodiments that Would still fall Within the scope of the appended claims. As used herein, the terms "comprise/comprises" or "include/includes" do not exclude the presence of other elements or steps. Furthermore, although individual features may be included in different claims (or embodiments), these may possibly advantageously be combined, and the inclusion of different claims (or embodiments) does not imply that a certain combination of features is not feasible and/or advantageous. In addition, singular references do not exclude a plurality. Finally, reference numerals in the claims are provided merely as a clarifying example and should not be construed as limiting the scope of the claims in any Way.
Claims (18)
1.CLAIMS An electrode assembly (10) for a secondary battery cell, the electrode assembly comprising: a conductive substrate (l); an electrode coating (2, 2°) provided on at least one side of the conductive substrate (l); Wherein the electrode coating (2, 2°) is at least partially coated on the conductive substrate (1), Whereby said conductive substrate (1) exhibits uncoated portions (4) and coated portions (2, 2”), and Wherein an edge coating layer (3) is arranged to cover at least a part of an interface (5) between said uncoated conductive substrate (4) portion and the electrode coating (2, 2°), characterized in that the edge coating layer comprises at least 55 Wt-% polyvinyl butyral. The electrode assembly (10) according to claim 1, Wherein said edge coating layer (3) has a thickness in the range of 1 to 55 um. The electrode assembly (10) according to any of the preceding claims, Wherein the electrode coating (2, 2°) is provided on said conductive substrate (1) such that the uncoated conductive substrate portion (4) is arranged along a longitudinal edge of the electrode assembly (10). The electrode assembly (10) according to any of the preceding claims, Wherein the electrode coating (2, 2°) is provided on said conductive substrate (1) such that the uncoated conductive substrate portion (4) is arranged across a width of electrode assembly (10), and such that the uncoated conductive substrate portion (4) is surrounded by the electrode coating (2, 2°) on both sides. The electrode assembly (10) according to any of the preceding claims Wherein the edge coating layer (3) further comprises at least any one of a metal oxide, a metal hydroxide and a metal oxide hydroxide, or a combination thereof, in the range of 1 to 20 Wt-%. The electrode assembly (10) according to claim 5, Wherein said metal is any one of aluminium, zirconium, titanium and silicon. The electrode assembly (10) according to claim 6, Wherein said metal oxide is aluminium oxide. The electrode assembly (10) according to claim 6, Wherein said metal oxide hydroxide is aluminium oxide hydroxide. The electrode assembly (10) according to any one of the preceding claims, Wherein said edge coating (3) layer further comprises a polymer in the range of 1 to 20 Wt-%. The electrode assembly (10) according to claim 9, Wherein said polymer is selected from the group consisting of poly(methyl methacrylate). The electrode assembly (10) according to any one of preceding claims, Wherein said edge coating layer (3) further comprises polyVinylidene fluoride (PVDF) in a range of 0 to 45 Wt-%. The electrode assembly (10) according to any one of the preceding claims, Wherein said edge coating layer (3) further comprises hydrogenated acrylonitrile butadiene (HNBR) rubber in a range of 0 to 45 Wt-%. The electrode assembly (10) according to any of the preceding claims, Wherein said edge coating layer (3) further comprises polyimide in a range of 0 to 45 Wt-%. The electrode assembly (10) according to any of the preceding claims, Wherein said edge coating layer (3) further comprises polyisobutane in a range of 0 to 45 Wt-%. The electrode assembly (10) according to claim 1, Wherein said edge coating comprises polyyinyl butyral in a range of 80 to 89 Wt-% and any one of aluminium oxide in a range of 11 to 20 Wt-%, an aluminim oxide hydroxide in a range of 11 to 20 Wt-%, and a polymer in a range of 11 to 20 Wt-%, or a combination thereof. The electrode assembly (10) according to any one of the preceding clainis, Wherein said edge coating layer (3) is arranged at an interface between a negative electrode coating and said substrate. A secondary battery cell coniprising the electrode assembly according to any one of clainis 1 to Use of a secondary battery cell according to claini 17, in an electrical vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2251198A SE546181C2 (en) | 2022-10-13 | 2022-10-13 | Overlapping edge coating comprising polyvinyl butyral in an electrode roll, and a cylindrical secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE2251198A SE546181C2 (en) | 2022-10-13 | 2022-10-13 | Overlapping edge coating comprising polyvinyl butyral in an electrode roll, and a cylindrical secondary cell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE2251198A1 true SE2251198A1 (en) | 2024-04-14 |
| SE546181C2 SE546181C2 (en) | 2024-06-18 |
Family
ID=91026360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE2251198A SE546181C2 (en) | 2022-10-13 | 2022-10-13 | Overlapping edge coating comprising polyvinyl butyral in an electrode roll, and a cylindrical secondary cell |
Country Status (1)
| Country | Link |
|---|---|
| SE (1) | SE546181C2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598274A (en) * | 1983-08-18 | 1986-07-01 | Romag Holdings Ltd. | Security and protection panel |
| JPH02109256A (en) * | 1988-10-18 | 1990-04-20 | Fuji Elelctrochem Co Ltd | Paper battery |
| JPH1012243A (en) * | 1996-06-26 | 1998-01-16 | Hitachi Maxell Ltd | Lithium secondary battery |
| US20020197535A1 (en) * | 2001-06-07 | 2002-12-26 | Dudley William R. | Coating edge control |
| CN108300056A (en) * | 2017-08-02 | 2018-07-20 | 天津市捷威动力工业有限公司 | A kind of cathode pole piece of lithium ion secondary battery primary coat coating |
-
2022
- 2022-10-13 SE SE2251198A patent/SE546181C2/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4598274A (en) * | 1983-08-18 | 1986-07-01 | Romag Holdings Ltd. | Security and protection panel |
| JPH02109256A (en) * | 1988-10-18 | 1990-04-20 | Fuji Elelctrochem Co Ltd | Paper battery |
| JPH1012243A (en) * | 1996-06-26 | 1998-01-16 | Hitachi Maxell Ltd | Lithium secondary battery |
| US20020197535A1 (en) * | 2001-06-07 | 2002-12-26 | Dudley William R. | Coating edge control |
| CN108300056A (en) * | 2017-08-02 | 2018-07-20 | 天津市捷威动力工业有限公司 | A kind of cathode pole piece of lithium ion secondary battery primary coat coating |
Also Published As
| Publication number | Publication date |
|---|---|
| SE546181C2 (en) | 2024-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2293367B1 (en) | Rechargeable secondary battery having improved safety against puncture and collapse | |
| KR101709161B1 (en) | Rechargeable battery and cylindrical lithium rechargeable battery | |
| KR100740126B1 (en) | Cell barrier for secondary battery module and secondary battery module | |
| US10559808B2 (en) | Lithium secondary battery having improved safety by using bimetal tab | |
| US11342639B2 (en) | Secondary battery and battery pack including the same | |
| KR101629499B1 (en) | Electrode assembly and secondary battery comprising the same | |
| EP2602845B1 (en) | Secondary battery comprising electrode leads coated with a corrosion-preventing protective layer | |
| US20200028200A1 (en) | Method for producing an electrode unit for a battery cell and electrode unit | |
| CN100405635C (en) | Secondary battery | |
| JP2019186102A (en) | Laminated battery | |
| CN114982038A (en) | Electrode assembly including anti-fault layer and method of manufacturing the same | |
| KR20100017265A (en) | Electrochemical cell and energy storage assembly | |
| CN104733682A (en) | High-voltage battery for vehicle | |
| KR20100017261A (en) | Electrochemical cell with weld points connections and energy storage assembly | |
| CN112802993A (en) | Battery with a battery cell | |
| SE2251198A1 (en) | Overlapping edge coating comprising polyvinyl butyralin in an electrode roll, and a cylindrical secondary cell | |
| SE2251196A1 (en) | Edge coating in an electrode roll, and a cylindrical secondary cell | |
| SE2251197A1 (en) | Overlapping edge coating comprising hydrogenated acrylonitrile butadiene in an electrode roll, and a cylindrical secondary cell | |
| SE2251195A1 (en) | Overlapping edge coating comprising polyisobutene in an electrode roll, and a cylindrical secondary cell | |
| CN219106242U (en) | Electrode assembly, cylindrical secondary battery, battery pack, and vehicle | |
| KR101476523B1 (en) | Electrode of secondary battery | |
| KR20210004580A (en) | Lithium ion secondary battery | |
| EP4145611A1 (en) | Secondary battery | |
| JP2023553034A (en) | Electrode assemblies, battery cells, battery packs, and automobiles | |
| JP2007234453A (en) | Secondary battery and its vehicle mounting structure |