CN220548657U - Battery separator stable at higher charge voltages and apparatus for making same - Google Patents
Battery separator stable at higher charge voltages and apparatus for making same Download PDFInfo
- Publication number
- CN220548657U CN220548657U CN202320093623.2U CN202320093623U CN220548657U CN 220548657 U CN220548657 U CN 220548657U CN 202320093623 U CN202320093623 U CN 202320093623U CN 220548657 U CN220548657 U CN 220548657U
- Authority
- CN
- China
- Prior art keywords
- feeding unit
- battery separator
- polyethylene polymer
- feeding
- coating
- 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
- -1 polyethylene Polymers 0.000 claims abstract description 95
- 229920000642 polymer Polymers 0.000 claims abstract description 86
- 239000004698 Polyethylene Substances 0.000 claims abstract description 77
- 229920000573 polyethylene Polymers 0.000 claims abstract description 77
- 239000000758 substrate Substances 0.000 claims abstract description 60
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 52
- 238000000576 coating method Methods 0.000 claims abstract description 38
- 239000011248 coating agent Substances 0.000 claims abstract description 37
- 239000000919 ceramic Substances 0.000 claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 claims abstract description 22
- 239000002356 single layer Substances 0.000 claims abstract description 20
- 238000010030 laminating Methods 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 64
- 239000010410 layer Substances 0.000 claims description 45
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 42
- 229910052744 lithium Inorganic materials 0.000 claims description 42
- 239000000463 material Substances 0.000 claims description 22
- 239000012982 microporous membrane Substances 0.000 claims description 20
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 239000011247 coating layer Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 11
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 10
- 239000004743 Polypropylene Substances 0.000 claims description 9
- 229920001155 polypropylene Polymers 0.000 claims description 9
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims description 8
- 239000002033 PVDF binder Substances 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910001593 boehmite Inorganic materials 0.000 claims description 6
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 claims description 6
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical class 0.000 claims description 4
- 229910001463 metal phosphate Inorganic materials 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 3
- 239000004693 Polybenzimidazole Substances 0.000 claims description 3
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 3
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 229920002480 polybenzimidazole Polymers 0.000 claims description 3
- 229920006324 polyoxymethylene Polymers 0.000 claims description 3
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 3
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 abstract description 21
- 238000007254 oxidation reaction Methods 0.000 abstract description 21
- 239000002994 raw material Substances 0.000 abstract description 9
- 210000004027 cell Anatomy 0.000 description 18
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 14
- 229910001416 lithium ion Inorganic materials 0.000 description 14
- 239000000203 mixture Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 10
- 229920000098 polyolefin Polymers 0.000 description 10
- 238000005524 ceramic coating Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000002585 base Substances 0.000 description 4
- 229910052788 barium Inorganic materials 0.000 description 3
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000001878 scanning electron micrograph Methods 0.000 description 2
- 206010011906 Death Diseases 0.000 description 1
- 229910010710 LiFePO Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910015515 LiNi0.8Co0.15 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000005342 ion exchange Methods 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
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 230000003797 telogen phase Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
- Cell Separators (AREA)
Abstract
A battery separator manufacturing apparatus that remains stable at higher charge voltages, comprising at least one set of means for forming a battery separator substrate, means for forming a coating, and means for laminating the coating and the substrate to one another; the apparatus for forming a battery separator substrate includes: a feeding unit of a non-polyethylene polymer, a feeding unit of a polyethylene polymer, a feeding unit of an embedded ceramic material, a mixing unit of the above three raw materials, and a single-layer porous film forming die containing the above three raw material components; the means for forming the coating is a feeding unit of pure ceramic material; the means for laminating the coating and the substrate to each other is located downstream of the means for forming the battery separator substrate and the means for forming the coating. According to the battery separator of the present utility model, both the substrate and the coating contain ceramic, while the coating contains only ceramic, has excellent oxidation resistance, can remain stable when charged at a higher voltage, and can prevent trickle charge.
Description
Technical Field
The present utility model relates to a battery separator that remains stable at higher charge voltages, has a very specific structure, and thus has excellent oxidation resistance, and can prevent trickle charge from occurring. The utility model also relates to a preparation device of the battery separator. The battery separator of the present utility model has a so-called "double ceramic layer structure" in which both the substrate and the coating layer contain ceramic, and the coating layer contains only ceramic; the base layer is a mixed material layer embedded with ceramic, and the coating layer contains no other components except the ceramic.
In the present utility model, the term "monolithic porous membrane" refers to a porous membrane comprising a mixture, blend or copolymer of non-polyethylene polymers, embedded ceramic materials.
Background
Manufacturers of batteries for electric vehicles have attempted to develop batteries with higher energy to extend the range of the electric vehicle, and common measures include: 1) Developing higher energy battery chemistries as a means of increasing the chemical potential of lithium batteries, or 2) increasing the current charging voltage of lithium batteries from 4.2-4.5 volts to the industry goal of 5 volts. Electric vehicles (EDV) of the prior art use a battery made of lithium iron phosphate (LiFePO 4 ) Or Lithium Manganate (LMO) cathodeA material. Due to LiFePO-based 4 And LMO chemicals are relatively low, such that the battery chemistry is stable only in the 4.2-4.5 volt charge voltage range. In order to increase the overall energy density of the battery, attempts have been made to use nickel cobalt aluminum NCA (LiNi 0.8 Co 0.15 A1 0.05 O 2 ) It can extend the charging voltage to 5.0 volts, with a charging voltage capacity of 5 volts, enabling the lithium battery to be charged more highly to allow for additional energy density. However, the adoption of the technical route of higher energy battery chemicals is costly and insufficient in oxidation resistance, and does not meet the market demand.
Thus, there is a market need for battery separators for rechargeable lithium batteries that are low cost, oxidation resistant, but have a 5 volt charge voltage. Meanwhile, with the development of lithium batteries that operate at higher voltages, higher charge rates, higher energies, and/or under similar conditions, there is a need for a microporous separator membrane for oxidation-resistant lithium batteries that can be used in high-energy batteries, and/or that is stable at voltages up to at least 5 volts in high-voltage battery systems. In addition, there is a need for a thin, highly oxidation resistant microporous separator membrane that prevents trickle charging at high voltages up to at least 5 volts in lithium batteries.
Unlike the prior art, the present utility model has one other technological path, i.e. the structure of the lithium battery separator is changed to maintain the separator material stable, avoid trickle charge and raise the battery capacity. For this purpose, in the present utility model, three raw material components of "non-polyethylene polymer", "embedded ceramic material" are simultaneously mixed in a single-layer base film, and additionally, a coating of pure ceramic material is provided. Experiments show that the utility model can achieve the technical aim.
As shown in fig. 7, in the closest prior art US9,099,739, three raw material components of "non-polyethylene polymer", "embedded ceramic material" are respectively provided in different layers of the base film, i.e., the base film thereof has a plurality of layers (instead, the present utility model is a single layer, see fig. 6), and are respectively "non-polyethylene polymer layer", "embedded ceramic material layer" (instead, the present utility model has these three raw material components simultaneously in one layer, see fig. 6). In addition, the coating of US9,099,739 differs from the present utility model in that the coating of US9,099,739 contains a polymer in addition to the ceramic as shown in fig. 7 (in contrast, the coating of the present utility model contains only ceramic components and no polymer at all, see fig. 6).
WO2005/114763A1 and US9,799,870B2 also do not disclose the distinguishing features between the present utility model and US9,099,739, either without embedded ceramics in the substrate or with other unwanted components in the coating than the coating.
On the contrary, the core technical concept of the utility model is that the ceramic is contained in two different parts of the substrate and the coating, and the embedded ceramic and the components outside the ceramic exist simultaneously in the substrate; and the coating only contains the coating, and other components are removed.
In summary, the technical idea of the present utility model has never been disclosed in the prior art, the separator structure of the present utility model has not been disclosed, and it is more impossible to have a dedicated apparatus for preparing a battery separator of such a specific structure.
Disclosure of Invention
The object of the present utility model is to provide a battery separator which remains stable at higher charging voltages, has a special product structure, and thus has excellent oxidation resistance, and can prevent trickle charge from occurring.
Another object of the present utility model is to provide a special manufacturing apparatus for the battery separator.
To this end, according to one aspect of the present utility model, there is provided a battery separator manufacturing apparatus that remains stable at a higher charging voltage, wherein the apparatus includes: at least one set of means for forming a battery separator substrate, means for forming a coating, and means for laminating the substrate and the coating to each other;
the apparatus for forming a battery separator substrate includes: a feeding unit of a non-polyethylene polymer (a) having a feeding unit discharge port of the non-polyethylene polymer (a), a feeding unit of a polyethylene polymer (a) having a feeding unit discharge port of the polyethylene polymer (B), a feeding unit of an embedded ceramic material (C) having a feeding unit discharge port of the embedded ceramic material (C), a mixing unit of raw materials (a+b+c), and a single-layer porous film forming die; the mixing unit of the raw materials (a+b+c) has a feeding unit feeding port from the non-polyethylene polymer (a), a feeding unit feeding port from the polyethylene polymer (B), a feeding unit feeding port from the embedded ceramic material (C); the single layer porous membrane (a+b+c) forms a mixture, blend or copolymer of a mold treated non-polyethylene polymer (a), a polyethylene polymer (B), an embedded ceramic material (C); the feeding unit discharge port of the non-polyethylene polymer (A) is communicated with the feeding unit feed port of the non-polyethylene polymer (A), and the feeding unit discharge port of the polyethylene polymer (B) is communicated with the feeding unit feed port of the polyethylene polymer (B); a discharge port of the feeding unit of the embedded ceramic material (C) is communicated with a feeding port of the feeding unit of the embedded ceramic material (C);
the means for forming the coating are feeding units of pure ceramic material (D);
means for laminating the substrate (a+b+c) and the coating layer (D) to each other are located downstream of the means for forming a battery separator substrate (a+b+c) and the means for forming the coating layer (D).
Preferably, the means for forming a coating layer (D) is provided on at least one side of the means for forming a battery separator substrate (a+b+c).
Preferably, the feeding unit of the embedded ceramic material (C) has a third feeding valve, which is in an open state in operation; whereas the feeding unit of the non-polyethylene polymer (a), the feeding unit of the polyethylene polymer (B) have a first feeding valve and a second feeding valve, respectively, at least one of said first feeding valve and said second feeding valve being in an open state in operation.
Preferably, at least one of the feeding unit of the non-polyethylene polymer (a), the feeding unit of the polyethylene polymer (B), the feeding unit of the embedded ceramic material (C), and the means for forming the coating layer (D) is an extruder.
Preferably, the feeding unit of the non-polyethylene polymer (a) is a feeding unit of poly (4-methylpentene) (PMP), a feeding unit of polyphenylene sulfide, a feeding unit of polybenzimidazole, a feeding unit of polytrifluoroethylene, a feeding unit of polyamide 66, a feeding unit of ethylene/vinyl alcohol copolymer, a feeding unit of polyvinylidene fluoride (PVDF), and/or a feeding unit of polyoxymethylene.
Preferably, the feeding unit of the polyethylene polymer (B) is a feeding unit of high density polyethylene, a feeding unit of isotactic polypropylene, and/or a feeding unit of ultra high molecular weight polyethylene.
Preferably, the feeding unit of the embedded ceramic material (C) is a feeding unit of ceramic particles, a feeding unit of alumina, a feeding unit of boehmite, a feeding unit of barium sulfate, a feeding unit of an X-ray detectable element, a feeding unit of metal oxide, a feeding unit of metal phosphate, a feeding unit of metal carbonate, a feeding unit of X-ray fluorescent material, a feeding unit of metal salt, and/or a feeding unit of metal sulfate; preferably, the feeding unit of the metal is a feeding unit of Zn, a feeding unit of Ti, a feeding unit of Mn, a feeding unit of Ba, a feeding unit of Ni, a feeding unit of W, a feeding unit of Hg, a feeding unit of Si, a feeding unit of Cs, a feeding unit of Sr, a feeding unit of Ca, a feeding unit of Rb, a feeding unit of Ta, a feeding unit of Zr, a feeding unit of Al, a feeding unit of Pb, a feeding unit of Sn, a feeding unit of Sb, a feeding unit of Cu, and/or a feeding unit of Fe; preferably, the single layer porous film (a+b+c) is drawn out of the mold by a pair of rollers.
Preferably, the substrate of the battery separator is a single-layer microporous membrane, a double-layer microporous membrane, a three-layer microporous membrane, or a multi-layer microporous membrane; the battery separator is a rechargeable lithium battery separator; and/or the battery separator has a double ceramic layer structure.
According to another aspect of the present utility model, there is provided a battery separator that remains stable at higher charge voltages, wherein the battery separator comprises a substrate and a coating; at least one of the substrate layers is a single-layer porous film containing at least one of a non-polyethylene polymer (A) and a polyethylene polymer (B) and an embedded ceramic material (C); and the coating is made of a pure ceramic material (D); the substrate (a+b+c) and the coating (D) being laminated to each other; whereby the battery separator has a double ceramic layer structure.
Preferably, the battery separator is directly obtained by the battery separator preparation apparatus according to the present utility model.
Table 1: the present utility model is significantly different from the prior art, as shown in FIGS. 6 and 7
Is the leader and manufacturer of lithium battery separator material, has unique status in the field of lithium battery separators, and is->The lithium battery industry is believed to be relegated to 5.0 volt (V) battery systems.
With the development of the lithium battery industry, a successful 5.0V system is increasingly required. As electrolyte performance has improved, higher voltage cells may be obtained. While single cell component performance is improved, other system components become a limiting factor in pursuing higher voltage battery cells. The voltages that can now be achieved in lithium battery technology have exposed to limitations associated with separators, particularly the problem of oxidative stability of the separator material in the operating environment.
To this end, the utility model relates to a novel separator made of a stable polymer in a 5.0 volt system.
As shown in figure 4 of the drawings,polyolefin separators are typically thin, opaque, polypropylene (PP) and/or Polyethylene (PE) electrolyte films, either microporous single layer or trilayer PP/PE/PP products, that provide a barrier between the anode and cathode of a lithium battery while performing the core function of facilitating ion exchange.
Celgard separator has the following characteristics: uniform submicron pore structure with high chemical and thermal stability, excellent acid, alkali and other chemical resistant properties, single and three layer products of various thickness and slit width, and/or hydrophobic or hydrophilic properties of various proprietary technologies.
Separators composed of stabilized polymers in a 5.0V system will meet or exceed the basic separator performance requirements while improving the overall separator performance of the 5.0V system, as a stabilizing material for a 5.0V lithium battery system, with good mechanical, thermal and electrochemical properties, and/or good strength, shrinkage and porosity.
As the cell voltage increases, the oxidation stability of typical separator materials decreases, and such oxidation of the separator materials may cause the cell performance to deteriorate over time. Therefore, in order for the separator to function successfully in a 5.0 volt lithium battery, it is necessary to prevent oxidation (degradation) of the separator.
According to the present utility model, it is possible to provide a battery separator that maintains stability at a higher charge voltage, has a special product structure that does not exist in the prior art, and thus has excellent oxidation resistance, and can prevent trickle charge from occurring.
According to the present utility model, a special manufacturing apparatus for the battery separator may be provided so that the product having a special structure becomes a commercial product.
Drawings
Fig. 1 is a schematic diagram of how microlayers are produced in the feed zone by lamination in the prior art.
Fig. 2 is a schematic diagram of how microlayers can be created by layering in the prior art.
Fig. 3 is a schematic structural view of a manufacturing apparatus for maintaining stable battery separators at higher charge voltages according to an embodiment of the present utility model.
Fig. 4 includes three typesSEM images of the surface and cross-section of the separator product.
FIG. 5 is a surface SEM image of a microporous membrane or separator of poly (4-methylpentene) (PMP) polymer of one embodiment of the utility model.
FIG. 6 is a schematic illustration of the structure of a "dual ceramic structure" separator formed from a multi-component substrate, pure ceramic coating in accordance with the present utility model.
Fig. 7 is a schematic illustration of a conventional structural separator formed from a single layer of a component substrate, a mixed ceramic coating, according to some prior art.
Detailed Description
In the prior art, as shown in fig. 1 and 2, the substrate of at least one layer of battery separator may be produced in a pre-packaged feed zone prior to entering a cast or blown film die. Each microlayer of the layer separator may be created in the feed zone by lamination (one example in fig. 1) or layering (one example in fig. 2). These techniques may further improve strength and flex crack resistance when used to make porous film precursors. These precursors will be laminated, annealed and stretched, and the resulting films may exhibit improved strength and toughness.
In the present utility model, the term "double ceramic layer structure" means that the battery separator has a ceramic layer mixed with other material components, and a ceramic layer not mixed with other material components, that is: a ceramic is embedded in the substrate of the battery separator, and the battery separator also comprises a non-polyethylene polymer, a polyethylene polymer (B) or both the non-polyethylene polymer and the polyethylene polymer (B); and only the ceramic component, and no other component, is contained in the coating layer of the battery separator (fig. 6). In summary, the battery separator of the present utility model has ceramic components within both the substrate and the coating, which is a pure ceramic coating.
In particular, the double ceramic layer structure of the utility model has the following beneficial technical effects:
the battery separator is stable when the battery is charged to more than 4.5 volts, the battery separator is stable when the battery is charged to 4.6 volts, the battery separator is stable when the battery is charged to 5.0 volts, or the battery separator is stable when the battery is charged to more than 5.0 volts;
the battery separator is used for a microporous separator of a high-energy lithium battery, and is stable when reaching a charging voltage of 5 volts;
the battery separator is a thermal shutdown film with high temperature thermal stability designed to help increase the overall energy density of the high energy lithium battery;
the battery separator is a polymer separator which adopts an embedded ceramic material to realize 5 volt charging voltage of a rechargeable lithium battery;
the battery separator is a microporous separator which supports the future development trend of high-energy batteries of consumer electronic equipment or can prolong the driving mileage of electric vehicles;
the battery separator has a thermal shutdown function;
the battery separator has a temperature stability of up to 165 ℃; and/or
The battery separator has temperature stability of more than or equal to 180 ℃.
The patentability of the utility model is a solution with a unique concept, however, the various "devices" and "units" employed by the various components of the utility model may be entirely as known in the art (fig. 1-2), and therefore, need not be described in detail herein.
As shown in fig. 3, according to an embodiment of the present utility model, there is provided a battery separator manufacturing apparatus that remains stable at a higher charging voltage, wherein the apparatus includes: at least one set of means for forming a battery separator substrate, means for forming a coating, and means for laminating the substrate and the coating to each other;
the apparatus for forming a battery separator substrate includes: a feeding unit of a non-polyethylene polymer (a) having a feeding unit discharge port of the non-polyethylene polymer (a), a feeding unit of a polyethylene polymer (a) having a feeding unit discharge port of the polyethylene polymer (B), a feeding unit of an embedded ceramic material (C) having a feeding unit discharge port of the embedded ceramic material (C), a mixing unit of raw materials (a+b+c), and a single-layer porous film forming die; the mixing unit of the raw materials (a+b+c) has a feeding unit feeding port from the non-polyethylene polymer (a), a feeding unit feeding port from the polyethylene polymer (B), a feeding unit feeding port from the embedded ceramic material (C); the single layer porous membrane (a+b+c) forms a mixture, blend or copolymer of a mold treated non-polyethylene polymer (a), a polyethylene polymer (B), an embedded ceramic material (C); the feeding unit discharge port of the non-polyethylene polymer (A) is communicated with the feeding unit feed port of the non-polyethylene polymer (A), and the feeding unit discharge port of the polyethylene polymer (B) is communicated with the feeding unit feed port of the polyethylene polymer (B); a discharge port of the feeding unit of the embedded ceramic material (C) is communicated with a feeding port of the feeding unit of the embedded ceramic material (C);
the means for forming the coating are feeding units of pure ceramic material (D);
means for laminating the substrate (a+b+c) and the coating layer (D) to each other are located downstream of the means for forming a battery separator substrate (a+b+c) and the means for forming the coating layer (D).
In particular, the means for forming the coating layer (D) is provided on at least one side of the means for forming the battery separator substrate (a+b+c).
Preferably, the feeding unit of the embedded ceramic material (C) has a third feeding valve, which is in an open state in operation; whereas the feeding unit of the non-polyethylene polymer (a), the feeding unit of the polyethylene polymer (B) have a first feeding valve and a second feeding valve, respectively, at least one of said first feeding valve and said second feeding valve being in an open state in operation.
The first, second, and third feed valves may all be selected from prior art products.
In particular, at least one of the feeding unit of the non-polyethylene polymer (a), the feeding unit of the polyethylene polymer (B), the feeding unit of the embedded ceramic material (C), and the means for forming the coating layer (D) is an extruder (see fig. 1-3).
In particular, the feeding unit of the non-polyethylene polymer (a) is a feeding unit of poly (4-methylpentene) (PMP), a feeding unit of polyphenylene sulfide, a feeding unit of polybenzimidazole, a feeding unit of polytrifluoroethylene, a feeding unit of polyamide 66, a feeding unit of ethylene/vinyl alcohol copolymer, a feeding unit of polyvinylidene fluoride (PVDF), and/or a feeding unit of polyoxymethylene.
In particular, the feeding unit of the polyethylene polymer (B) is a feeding unit of high density polyethylene, a feeding unit of isotactic polypropylene, and/or a feeding unit of ultra high molecular weight polyethylene.
In particular, the feeding unit of the embedded ceramic material (C) is a feeding unit of ceramic particles, a feeding unit of alumina, a feeding unit of boehmite, a feeding unit of barium sulfate, a feeding unit of an X-ray detectable element, a feeding unit of metal oxide, a feeding unit of metal phosphate, a feeding unit of metal carbonate, a feeding unit of X-ray fluorescent material, a feeding unit of metal salt, and/or a feeding unit of metal sulfate.
In particular, the metal feed units are Zn feed units, ti feed units, mn feed units, ba feed units, ni feed units, W feed units, hg feed units, si feed units, cs feed units, sr feed units, ca feed units, rb feed units, ta feed units, zr feed units, al feed units, pb feed units, sn feed units, sb feed units, cu feed units, and/or Fe feed units.
In particular, the single layer porous film (a+b+c) is pulled out of the mold by a pair of rollers (fig. 3).
In particular, the substrate of the battery separator is a single-layer microporous membrane, a double-layer microporous membrane, a three-layer microporous membrane, or a multi-layer microporous membrane.
In particular, the battery separator is a rechargeable lithium battery separator.
In particular, the battery separator has a double ceramic layer structure.
According to another embodiment of the present utility model, as shown in fig. 6, there is provided a battery separator that remains stable at higher charge voltages, wherein the battery separator comprises a substrate and a coating; at least one of the substrate layers is a single-layer porous film containing at least one of a non-polyethylene polymer (A) and a polyethylene polymer (B) and an embedded ceramic material (C); and the coating is made of a pure ceramic material (D); the substrate (a+b+c) and the coating (D) being laminated to each other; whereby the battery separator has a double ceramic layer structure.
In particular, the battery separator is directly obtained from the battery separator manufacturing apparatus according to the present utility model.
According to one embodiment, the present utility model relates to a new generation of separators, battery cells, batteries, and/or manufacturing and/or use devices. In accordance with at least some embodiments, the present utility model relates to a separator for a high energy and/or high voltage lithium battery that is stable at a charging voltage of 4.5 volts, 5.0 volts, or higher; for example, a new generation of single or multi-layer or layered microporous separator membranes.
According to one embodiment, the present utility model relates to a new generation of porous membranes or substrates, separators, composites, electrochemical devices, batteries, devices for making such membranes or substrates, separators, and/or batteries, and/or devices for using such membranes or substrates, separators, and/or batteries. In accordance with at least certain embodiments, the present utility model relates to new generation microporous membranes, battery separators, energy storage devices, batteries including such separators, devices for making such membranes, separators, and/or batteries, and/or devices for using such membranes, separators, and/or batteries. In accordance with at least certain selected embodiments, the present utility model is directed to a new generation of separator membranes or separators for batteries that are stable in the battery to at least 5 volts. The membranes are preferably new generation polymer membranes or polymer microporous membranes, with or without embedded particles, suitable for use in 5 volt lithium batteries and/or providing the desired increased energy density of the battery and/or having excellent oxidation resistance. According to at least specific embodiments, the battery separator of the present utility model is directed to a single or multi-layer or composite microporous membrane battery separator that may have excellent oxidation resistance and/or be stable in high voltage battery systems up to 5 volts.
The usual measure of increasing the cell energy level of lithium ion rechargeable batteries increases the charging voltage to increase the overall energy density of the cell. The separator of the present utility model may include or comprise a thermal shutdown film having high temperature thermal stability designed to increase the total energy density of a high energy lithium battery. The microporous separator membrane of the present utility model uses new polymers and/or embedded ceramic materials to achieve a new generation of technology polymer separator membranes with 5 volt charge voltage capacity in lithium ion rechargeable batteries. In addition, the microporous separator membrane of the present utility model supports the future trend of high energy lithium batteries for consumer electronics applications or capable of achieving an extended driving range in electric vehicle applications.
The utility model is also useful in a polymeric microporous separator membrane having oxidative stability at 5 volts in a lithium ion rechargeable battery. The microporous separator membrane of the present utility model is preferably a new generation of polymeric separator membranes that use a new type of embedded ceramic material to achieve a 5 volt charge voltage capacity in a lithium ion rechargeable battery. In addition, the microporous separator membrane of the present utility model is more preferably a non-polyolefin separator membrane of a new generation technology that uses a novel embedded ceramic material to achieve oxidative stability at 5 volt charge voltage in a lithium ion rechargeable battery.
An important component to achieve a 5 volt charge voltage capacity is the battery separator. Separator materials such as polyolefins of the prior art are currently used as battery separators in lithium ion rechargeable batteries of 4.2 to 4.5 volts. Preferably, a polyolefin separator, such as a polypropylene microporous separator having a thermal shutdown function and a thermal stability up to 165 ℃ is used as a battery separator in a lithium ion rechargeable battery of 4.2 to 4.5 volts. More preferably, a polyolefin separator with a ceramic coating or layer as disclosed in U.S. patent 6,432,586 (incorporated herein by reference) having a thermal shutdown function and high temperature stability up to 180 ℃ is used for 4.2 to 4.5 volt lithium ion rechargeable batteries.
The utility model is better for microporous separators for high energy lithium batteries, which are stable at 5 volt charge voltages. The separator of the present utility model may be implemented in a separator or a membrane, which is composed of a thermal shutdown membrane having high temperature thermal stability, which can increase the total energy density of the high energy lithium battery. The microporous separator membrane of the present utility model is a new generation of technology polymeric separator membranes that use new embedded ceramic materials to achieve 5 volt charge voltage capacity in lithium ion rechargeable batteries.
Charging a battery with a 5 volt charge voltage capacity to a higher level allows for additional energy density. An important component to achieve a 5 volt charge voltage capacity is the battery separator. Existing separator materials such as polyolefins may be used as battery separators in lithium ion rechargeable batteries of 4.2 to 4.5 volts. Preferably, the polyolefin separator of the present utility model, for example, employs a polypropylene microporous separator having a thermal shutdown function and having a thermal stability up to 165 ℃ as a battery separator in a lithium ion rechargeable battery of 4.2 to 4.5 volts. More preferably, the polyolefin separator with ceramic coating or layer of the present utility model, as disclosed in U.S. patent No.6,432,586, has a thermal shutdown function and high temperature stability up to 180 ℃ for 4.2 to 4.5 volt lithium ion rechargeable batteries.
The diaphragm provided by the utility model is a polyolefin diaphragm which uses a novel embedded ceramic material to realize 5-volt charging voltage capacity in a lithium ion rechargeable battery, and also can be a non-polyolefin diaphragm which uses a novel embedded ceramic material to realize 5-volt charging voltage capacity in a lithium ion rechargeable battery.
The microporous membrane can be used for electronic equipment, so that the electric vehicle can realize the extension of driving mileage, and accords with the future development trend of high-energy lithium batteries.
The present utility model may provide a microporous separator membrane for a high energy lithium battery that is stable at a 5 volt charge voltage.
The present utility model relates to a new generation of separators, battery cells, batteries, and/or manufacturing and/or use devices. In accordance with at least some embodiments, the present utility model is directed to a new generation of separators, such as separators for high energy and/or high voltage lithium batteries, that can be stabilized at a charging voltage of 4.5 volts, 5.0 volts, or higher, such as a new generation of single or multi-layer or layered microporous separators.
The present utility model is useful in microporous separators for high energy rechargeable lithium batteries that are sufficiently stable or effective in the battery during a specified, prescribed, or desired number of repeated charge and discharge cycles of the rechargeable battery that a rechargeable lithium battery up to 5 volts can maintain the performance of an effective separator during repeated charge and discharge cycles of use. Thus, during the reasonable lifetime of a particular battery, the separator should be effective or functional during a specified, prescribed, or expected number of repeated charge-discharge cycles of the rechargeable battery. The separator should prevent a short circuit caused by the anode contacting the cathode, catastrophic hard-shorting of the cell, thermal runaway of the cell, or serious safety issues of the cell during repeated charge-discharge cycles during use of the cell, so that a useful rechargeable cell will be obtained that remains effective throughout the repeated charge-discharge cycles, at least fully effective for the expected number of charge cycles for a given cell application, typically expressed in terms of cycle life. A rechargeable battery, including a lithium battery, may be defined as "the number of cycles consisting of discharge, charge and rest phases that a rechargeable battery can withstand under specified conditions before its specified end-of-life capacity or load voltage is reached.
The present utility model relates to a new generation of separators, battery cells, batteries, and/or manufacturing and/or use devices. In accordance with at least some embodiments, the present utility model is directed to a new generation of separators, such as separators for high energy and/or high voltage lithium batteries, that can be stabilized at a charging voltage of 4.5 volts, 5.0 volts, or higher, such as a new generation of single or multi-layer or layered microporous separators.
In accordance with at least some embodiments, the present utility model is directed to a new generation of separators, such as separators for high energy and/or high voltage lithium batteries, that can be stabilized at a charging voltage of 4.5 volts, 5.0 volts, or higher, such as a new generation of single or multi-layer or layered microporous separators. In accordance with at least certain selected embodiments, the present utility model relates to a new generation of porous membranes or substrates, separators, composites, electrochemical devices, batteries, apparatus for making such membranes or substrates, separators, and/or batteries, and/or apparatus for using such membranes or substrates, separators, and/or batteries. In accordance with at least certain embodiments, the present utility model relates to new generation microporous membranes, battery separators, energy storage devices, batteries including such separators, devices for making such membranes, separators, and/or batteries, and/or devices for using such membranes, separators, and/or batteries. In accordance with at least some embodiments, the present utility model relates to a new generation of separators or separators for batteries that are stable at voltages of at least 5 volts in the battery. The films are a new generation of polymeric films or polymeric microporous films that are suitable for use in 5 volt lithium batteries and/or provide the desired increased energy density of the battery and/or have excellent oxidation resistance. According to particular embodiments, the battery separator of the present utility model is directed to a single or multi-layer or composite microporous membrane battery separator that may have excellent oxidation resistance and/or be stable in high voltage battery systems up to 5 volts, more stable in high voltage battery systems of 4.5 volts, 4.7 volts, 5 volts, or higher.
The present utility model addresses the needs or problems described above and/or may provide a new generation of porous membranes or substrates, separators, composites, electrochemical devices, batteries, apparatus for making such membranes or substrates, separators, and/or batteries, and/or apparatus for using such membranes or substrates, separators, and/or batteries. According to certain embodiments, the present utility model relates to new generation microporous membranes, battery separators, energy storage devices, batteries including such separators, devices for making such membranes, separators, and/or batteries, and/or devices for using such membranes, separators, and/or batteries. According to certain selected embodiments, the present utility model relates to a new generation of separators or separators for batteries that are stable at least 5 volts in the battery. The membrane is preferably a new generation of polymeric membrane or polymeric microporous membrane suitable for use in 5 volt lithium batteries and/or providing the desired increased energy density of the battery and/or having excellent oxidation resistance. According to particular embodiments, the battery separator of the present utility model is directed to a single or multi-layer or composite microporous membrane battery separator that may have excellent oxidation resistance and/or be stable in high voltage battery systems up to 5 volts, more stable in high voltage battery systems of 4.5 volts, 4.7 volts, 5 volts, or higher.
The separator of the present utility model relates to microporous battery separators made from 5 volt system stable polymers: for example, a resin or a mixture, blend or copolymer thereof having a melting point T of more than 200 DEG C m And a glass transition temperature T exceeding 250 DEG C g ：
The present utility model relates to a new generation of microporous battery separators, batteries including such separators, devices for making such membranes, separators, and/or batteries, and/or devices using such membranes, separators, and/or batteries. According to certain embodiments, the present utility model relates to a battery separator for a primary or secondary battery.
According to certain embodiments, the polymeric microporous membranes of the present utility model relate to polymeric microporous membranes coated with coatings, ceramic coatings, and the like.
According to some embodiments, the present utility model relates to a new generation of porous membranes or substrates, separators, composites, electrochemical devices, batteries, devices for making such membranes or substrates, separators, and/or batteries, and/or devices for using such membranes or substrates, separators, and/or batteries. According to certain embodiments, the present utility model relates to new generation microporous membranes, battery separators, energy storage devices, batteries including such separators, devices for making such membranes, separators, and/or batteries, and/or devices for using such membranes, separators, and/or batteries. According to certain embodiments, the present utility model relates to a new generation of separators or separators for batteries that are stable at voltages of at least 5 volts in the battery. The films are a new generation of polymeric films or polymeric microporous films that are suitable for use in 5 volt lithium batteries and/or provide the desired increased energy density of the battery and/or have excellent oxidation resistance. According to particular embodiments, the battery separator of the present utility model is directed to a single or multi-layer or composite microporous membrane battery separator that may have excellent oxidation resistance and/or be stable in high voltage battery systems up to 5 volts, or be stable in high voltage battery systems of 4.5 volts, 4.7 volts, 5 volts, or higher.
The utility model has embedded particles or materials, e.g., ceramic particles or materials, such as alumina, boehmite, barium and/or barium sulfate separators or separators, and may also have novel polymers, e.g., PVDF or PMP, and/or one or more ceramic coatings. The embedded particles may be selected from one or more of the following: particles or materials, ceramic particles or materials, alumina, boehmite, barium and/or barium sulfate, X-ray detectable elements, metals, metal oxides, metal phosphates, metal carbonates, X-ray fluorescent materials, metal salts, metal sulfates, or mixtures thereof, the metals may be selected from Zn, ti, mn, ba, ni, W, hg, si, cs, sr, ca, rb, ta, zr, al, pb, sn, sb, cu, fe, combinations, blends, or mixtures thereof.
The present utility model relates to a new generation of separators, battery cells, batteries, and/or manufacturing and/or use devices. According to certain embodiments, the present utility model relates to a new generation of separators, for example for high energy and/or high voltage lithium batteries, which can remain stable at charging voltages up to 4.5 volts, 5.0 volts, or more; such as new generation single or multi-layer or porous microporous separator membranes. The present utility model relates to a new generation of porous membranes or substrates, separator membranes, separators, composites, electrochemical devices, batteries, cells, devices for making such membranes or substrates, separator membranes, cells, and/or batteries, and/or devices using such membranes or substrates, separators, cells, and/or batteries. According to certain embodiments, the present utility model relates to new generation microporous membranes, battery separators, energy storage devices, batteries including such separators, devices for making such membranes, separators, and/or batteries, and/or devices for using such membranes, separators, and/or batteries. According to certain embodiments, the present utility model relates to a new generation of separators or membranes that remain stable up to a battery voltage of at least 5 volts, with or without embedded particles or materials, such as ceramic particles or materials, such as alumina, boehmite, and/or barium; and/or it may or may not have a novel polymer such as PVDF or PMP; and/or it may or may not have one or more ceramic coatings. The present utility model relates to a new generation of polymeric films or polymeric microporous films suitable for use in rechargeable or secondary lithium batteries of 4.5 volts, 4.7 volts, 5 volts or higher, which can increase the energy density of the battery, and/or which have excellent oxidation resistance. The battery separator of the present utility model relates to single or multi-layer or composite microporous membrane battery separators that have excellent oxidation resistance and/or are stable in high voltage lithium battery systems up to 5 volts or more.
The present utility model may have various modified embodiments without departing from the basic technical idea and spirit, and therefore, the appended claims, rather than the specification, shall be used to define the scope of the utility model. Furthermore, the present utility model may be practiced without any of the unnecessary features not specifically disclosed, but without departing from the scope of the present utility model.
The present utility model was filed in order to enable new generation technology to gain patent authorization as soon as possible. The applicant reserves the right to submit an inventive patent application herein.
Claims (12)
1. A battery separator manufacturing apparatus that remains stable at higher charging voltages, wherein the apparatus comprises: at least one set of means for forming a battery separator substrate, means for forming a coating, and means for laminating said substrate and said coating to each other;
the apparatus for forming a battery separator substrate includes: a feeding unit of a non-polyethylene polymer (a), a feeding unit of a polyethylene polymer (B), a feeding unit of an embedded ceramic material (C), a mixing unit of a non-polyethylene polymer (a) and a polyethylene polymer (B) and an embedded ceramic material (C), and a single-layer porous film forming die, wherein the feeding unit of a non-polyethylene polymer (a) has a feeding unit discharge port of a non-polyethylene polymer (a), the feeding unit of a non-polyethylene polymer (a) has a feeding unit discharge port of a polyethylene polymer (B), and the feeding unit of an embedded ceramic material (C) has a feeding unit discharge port of an embedded ceramic material (C); the mixing unit of the non-polyethylene polymer (A) and the polyethylene polymer (B) and the embedded ceramic material (C) is provided with a feeding unit feeding port from the non-polyethylene polymer (A), a feeding unit feeding port from the polyethylene polymer (B) and a feeding unit feeding port from the embedded ceramic material (C); the single-layer porous membrane is treated by a forming die; the feeding unit discharge port of the non-polyethylene polymer (A) is communicated with the feeding unit feed port of the non-polyethylene polymer (A), and the feeding unit discharge port of the polyethylene polymer (B) is communicated with the feeding unit feed port of the polyethylene polymer (B); a discharge port of the feeding unit of the embedded ceramic material (C) is communicated with a feeding port of the feeding unit of the embedded ceramic material (C);
the means for forming the coating (D) are a feeding unit of pure ceramic material;
means for laminating said substrate and said coating (D) to each other are located downstream of said means for forming a battery separator substrate and said means for forming coating (D).
2. The battery separator manufacturing apparatus of claim 1, wherein the means for forming a coating layer (D) is disposed on at least one side of the means for forming a battery separator substrate.
3. The battery separator manufacturing apparatus of claim 1, wherein the feeding unit of the embedded ceramic material (C) has a third feeding valve in an open state in operation; whereas the feeding unit of the non-polyethylene polymer (a), the feeding unit of the polyethylene polymer (B) have a first feeding valve and a second feeding valve, respectively, at least one of said first feeding valve and said second feeding valve being in an open state in operation.
4. The battery separator manufacturing apparatus according to claim 1, wherein at least one of the feeding unit of the non-polyethylene polymer (a), the feeding unit of the polyethylene polymer (B), the feeding unit of the embedded ceramic material (C), and the coating layer (D) forming means is an extruder.
5. The battery separator manufacturing apparatus according to claim 1, wherein the feeding unit of the non-polyethylene polymer (a) is a feeding unit of poly 4-methylpentene, a feeding unit of polyphenylene sulfide, a feeding unit of polybenzimidazole, a feeding unit of polytrifluoroethylene, a feeding unit of polyamide 66, a feeding unit of ethylene/vinyl alcohol copolymer, a feeding unit of polyvinylidene fluoride, and/or a feeding unit of polyoxymethylenes.
6. The battery separator manufacturing apparatus according to claim 1, wherein the feeding unit of the polyethylene polymer (B) is a feeding unit of high-density polyethylene, a feeding unit of isotactic polypropylene, and/or a feeding unit of ultra-high molecular weight polyethylene.
7. The battery separator manufacturing apparatus according to claim 1, wherein the feeding unit of the embedded ceramic material (C) is a feeding unit of ceramic particles, a feeding unit of alumina, a feeding unit of boehmite, a feeding unit of barium sulfate, a feeding unit of an X-ray detectable element, a feeding unit of metal oxide, a feeding unit of metal phosphate, a feeding unit of metal carbonate, a feeding unit of X-ray fluorescent material, a feeding unit of metal salt, and/or a feeding unit of metal sulfate; the metal feeding units are Zn feeding unit, ti feeding unit, mn feeding unit, ba feeding unit, ni feeding unit, W feeding unit, hg feeding unit, si feeding unit, cs feeding unit, sr feeding unit, ca feeding unit, rb feeding unit, ta feeding unit, zr feeding unit, al feeding unit, pb feeding unit, sn feeding unit, sb feeding unit, cu feeding unit, and/or Fe feeding unit.
8. The battery separator manufacturing apparatus of claim 1, wherein the substrate of the battery separator is a single layer microporous membrane, a double layer microporous membrane, a triple layer microporous membrane, or a multi-layer microporous membrane.
9. The battery separator manufacturing apparatus of claim 1, wherein the single layer porous membrane is pulled out of the mold by a pair of rollers.
10. The battery separator manufacturing apparatus of claim 1, wherein the battery separator is a rechargeable lithium battery separator.
11. The battery separator manufacturing apparatus of claim 1, wherein the battery separator has a double ceramic layer structure.
12. A battery separator that is stable at higher charge voltages, wherein,
the battery separator includes a substrate and a coating;
at least one of the substrate layers is a single-layer porous film containing at least one of a non-polyethylene polymer (A) and a polyethylene polymer (B) and an embedded ceramic material (C); and is also provided with
The coating (D) is made of pure ceramic material;
the substrate and the coating are laminated to each other;
the battery separator has a double ceramic layer structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320093623.2U CN220548657U (en) | 2023-01-31 | 2023-01-31 | Battery separator stable at higher charge voltages and apparatus for making same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320093623.2U CN220548657U (en) | 2023-01-31 | 2023-01-31 | Battery separator stable at higher charge voltages and apparatus for making same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220548657U true CN220548657U (en) | 2024-03-01 |
Family
ID=90003861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320093623.2U Active CN220548657U (en) | 2023-01-31 | 2023-01-31 | Battery separator stable at higher charge voltages and apparatus for making same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220548657U (en) |
-
2023
- 2023-01-31 CN CN202320093623.2U patent/CN220548657U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116526070A (en) | Material chemistry: lithium battery separator chemically stable at higher charge voltages | |
| US20120225345A1 (en) | Stack-type cell or bi-cell, electrode assembly for secondary battery using the same, and manufacturing method thereof | |
| EP2436064A1 (en) | Batteries utilizing anode coatings directly on nanoporous separators | |
| KR20170112250A (en) | A separator comprising a adhesion layer for an electrochemical device and an electrode assembly comprising the same | |
| KR102017239B1 (en) | A separator for electrochemical device comprising a porous coating layer comprising heat-resistant particles and electrochemical device comprising the same | |
| KR101943502B1 (en) | A method for manufacturing a separator for a lithium secondary battery and the separator fabricated by the same | |
| WO2022075823A1 (en) | Separator for secondary battery comprising adhesive layer, and method for manufacturing separator | |
| KR20160136089A (en) | A Separator Having an Electrode Bonding Layer and A Secondary battery Comprising the Same | |
| CN114144931A (en) | Separator for lithium secondary battery having enhanced electrode adhesion strength and improved resistance characteristics, and lithium secondary battery comprising same | |
| KR20210052336A (en) | Separator for Lithium secondary battery with improved adhesiveness toward an electrode and resistance properties and Lithium secondary battery comprising the separator | |
| CN111149237A (en) | Porous separator and electrochemical device comprising same | |
| CN115336097B (en) | Separator for electrochemical device and method of manufacturing the same | |
| KR20170103208A (en) | An electrode assembly with enhanced interlayer binding force between a separator and an anode | |
| US20220407181A1 (en) | Separator for electrochemical device and electrochemical device comprising same | |
| CN114008847B (en) | Separator and electrochemical device including the same | |
| CN220548657U (en) | Battery separator stable at higher charge voltages and apparatus for making same | |
| US20190067731A1 (en) | Nonaqueous electrolyte secondary battery | |
| KR20160036988A (en) | A separator with porous coating layer comprising polyolefin binder and a method of making the same | |
| KR102538606B1 (en) | A porous substrate for a separator and a separator for an electrochemical device comprising the same | |
| KR101910222B1 (en) | A multi-layered separator having high heat resistance property for a secondary battery | |
| EP3787067A1 (en) | Separator for electrochemical device and electrochemical device comprising same | |
| KR102621323B1 (en) | A method for manufacturing an electrode assembly and an electrochemical device comprising the electrode assembly manufactured therefrom | |
| KR20170109945A (en) | Separator and preparation method thereof | |
| KR102630852B1 (en) | Electrode Assembly Comprising Separator Having Conductive Layer and Battery Cell Comprising the Same | |
| US12002986B2 (en) | Thin polyethylene separator with reduced compressibility and electrochemical device including the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |