CN110994036A - Prevent acupuncture cylinder type lithium cell - Google Patents
Prevent acupuncture cylinder type lithium cell Download PDFInfo
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- CN110994036A CN110994036A CN201911343956.0A CN201911343956A CN110994036A CN 110994036 A CN110994036 A CN 110994036A CN 201911343956 A CN201911343956 A CN 201911343956A CN 110994036 A CN110994036 A CN 110994036A
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- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 103
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000001467 acupuncture Methods 0.000 title claims description 17
- 239000007774 positive electrode material Substances 0.000 claims abstract description 56
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 46
- 239000011888 foil Substances 0.000 claims abstract description 46
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 45
- 239000007773 negative electrode material Substances 0.000 claims abstract description 33
- 239000011889 copper foil Substances 0.000 claims abstract description 30
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 229910021450 lithium metal oxide Inorganic materials 0.000 claims description 8
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 7
- 229910044991 metal oxide Inorganic materials 0.000 claims description 6
- 150000004706 metal oxides Chemical class 0.000 claims description 6
- LSGOVYNHVSXFFJ-UHFFFAOYSA-N vanadate(3-) Chemical compound [O-][V]([O-])([O-])=O LSGOVYNHVSXFFJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910021383 artificial graphite Inorganic materials 0.000 claims description 5
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 claims description 5
- 229910019142 PO4 Inorganic materials 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 229910021382 natural graphite Inorganic materials 0.000 claims description 4
- 239000010452 phosphate Substances 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- 230000002265 prevention Effects 0.000 claims description 4
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910015645 LiMn Inorganic materials 0.000 claims description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 2
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 claims description 2
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- IEFJDZJERJLOEW-UHFFFAOYSA-L lithium cobalt(2+) sulfate Chemical class S(=O)(=O)([O-])[O-].[Co+2].[Li+] IEFJDZJERJLOEW-UHFFFAOYSA-L 0.000 claims description 2
- RSNHXDVSISOZOB-UHFFFAOYSA-N lithium nickel Chemical compound [Li].[Ni] RSNHXDVSISOZOB-UHFFFAOYSA-N 0.000 claims description 2
- -1 nickel-cobalt-aluminum Chemical compound 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims description 2
- 229910052596 spinel Inorganic materials 0.000 claims description 2
- 239000011029 spinel Substances 0.000 claims description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 claims description 2
- DGCPSAFMAXHHDM-UHFFFAOYSA-N sulfuric acid;hydrofluoride Chemical compound F.OS(O)(=O)=O DGCPSAFMAXHHDM-UHFFFAOYSA-N 0.000 claims description 2
- 239000002388 carbon-based active material Substances 0.000 claims 2
- 239000002153 silicon-carbon composite material Substances 0.000 claims 2
- 208000012266 Needlestick injury Diseases 0.000 claims 1
- 239000013543 active substance Substances 0.000 abstract description 8
- 239000011149 active material Substances 0.000 description 9
- 239000012528 membrane Substances 0.000 description 5
- 238000004880 explosion Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 239000005030 aluminium foil Substances 0.000 description 1
- 239000006183 anode active material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- 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
- H01M50/463—Separators, membranes or diaphragms characterised by their shape
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a needling-prevention cylindrical lithium battery which comprises a battery inner core outer ring, a battery inner core secondary outer ring and inner rings of the rest parts of a battery inner core, wherein the battery inner core outer ring, the battery inner core secondary outer ring and the inner rings are of specific structures. The outer ring of the battery inner core comprises a positive plate aluminum foil section, a negative plate copper foil section and a thin diaphragm section, wherein the two surfaces of the positive plate aluminum foil section are not coated with positive active substances of a lithium battery, the two surfaces of the negative plate copper foil section are not coated with negative active substances of the lithium battery, and the thin diaphragm section is arranged on the outer ring of the battery inner core. The secondary outer ring of the battery inner core comprises a negative plate copper foil section with two sides coated with negative active materials of the lithium battery, a thick diaphragm section and a positive plate aluminum foil section with one side coated with positive active materials of the battery. The inner ring of the battery inner core is composed of a negative plate copper foil section coated with negative active materials of the lithium battery on two sides, a thick diaphragm section and a positive plate aluminum foil section coated with positive active materials of the battery on two sides.
Description
Technical Field
The invention relates to the technical field of lithium batteries, in particular to a lithium battery capable of preventing needling.
Background
The lithium ion secondary battery has the advantages of high working voltage, high specific energy, more recycling times, long storage time and the like, is widely applied to portable electronic equipment such as mobile phones, digital cameras, portable computers and the like, and also has wide application in electric vehicles, electric bicycles and other vehicles, wherein the electric vehicles have stricter requirements on the safety performance of the lithium ion secondary battery. For this reason, battery operators have tried to achieve the object of safety of batteries by various methods, such as having safety valves for explosion prevention, having current cut-off devices of pressure detection type, and the like.
In an accident situation in the use process of the battery, such as the occurrence of a needle prick situation, when a metal sharp needle penetrates through positive and negative electrode materials in the battery, the internal short circuit of the battery is caused directly, the current in the battery is suddenly increased, and safety accidents caused by the rapid temperature rise are always concerned hot spots.
Disclosure of Invention
The invention aims to provide a method which can effectively solve the safety problem of a lithium battery caused by needling. In order to overcome the potential safety hazard of the lithium battery caused by needling, a large number of experiments find that: 1. the safety of lithium battery needling is related to the charging quantity, and when the SOC is lower than 40%, the needling is insufficient to cause explosion; 2. the safety of lithium battery needling is related to the position of needling, when the needling point is at the position coated with active materials, explosion is easily caused, and when the needling point is at the white space, the safety is ensured. Based on this, we further concluded the following through numerous iterations: for a fully charged lithium battery, the safety of the needling depends on the release degree of the charge of the lithium battery before the needling touches the active material on the lithium battery pole piece. The larger and faster the amount released, the safer.
The technical scheme adopted by the invention is as follows: the utility model provides a prevent acupuncture cylindrical lithium cell, the cylindrical lithium cell of preventing acupuncture contain battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core.
Above-mentioned prevent acupuncture cylinder type lithium cell, battery core outer lane (I) including two-sided anodal piece aluminium foil section (3) that do not coat lithium cell positive pole active material, two-sided negative pole piece copper foil section (1) and thin diaphragm section (2) that do not coat lithium cell negative pole active material.
The anti-needling cylindrical lithium battery is characterized in that the thickness of the thin diaphragm section is 12-18 mu m.
According to the anti-needling cylindrical lithium battery, the negative electrode active substance of the battery is one or more of natural graphite, artificial graphite, lithium titanate and a silicon-carbon active substance, and the silicon-carbon active substance is a silicon-carbon compound which specifically comprises silicon-based amorphous carbon, silicon-based amorphous carbon-graphite, silicon-based amorphous carbon-graphene, silicon-based amorphous carbon-carbon nano tubes, silicon-based graphene or a silicon-carbon compound doped with metal oxides.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with a double-sided coated negative active material of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with a single-sided coated positive active material of the battery.
According to the anti-needling cylindrical lithium battery, the thickness of the thick diaphragm section (4) is 24-28 microns.
According to the anti-needling cylindrical lithium battery, the positive electrode active material of the battery is one or more of lithium metal oxide with a layered structure, lithium-free metal oxide, lithium metal oxide with a spinel structure, lithium metal phosphate, lithium metal fluoride sulfate and lithium metal vanadate.
In the above cylinder lithium battery with needle-prick prevention function, the lithium metal oxide with the layered structure is selected from Lithium Cobaltate (LCO), nickel-cobalt-manganese ternary material (NCM), and nickel-cobalt-aluminum ternary material (NCA); the lithium-free metal oxide may be selected from V2O5Or MnO2(ii) a The spinel-structured lithium metal oxide may be selected from lithium manganate (LiMn)2O4) (ii) a The lithium metal phosphate may be selected from lithium iron phosphate (LFP); the lithium metal fluorinated sulfate may be selected from the group consisting of fluorinated lithium cobalt sulfate (LiCoFSO)4) (ii) a The lithium metal vanadate may be selected from nickel lithium vanadate (LiNiVO)4)。
In the anti-needling cylindrical lithium battery, the positive plate aluminum foil section (5) with the single side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The anti-needling cylindrical lithium battery is characterized in that the inner ring (III) of the inner core of the battery consists of a negative plate copper foil section (8) coated with negative active materials of the lithium battery on two sides, a thick diaphragm section (4) and a positive plate aluminum foil section (7) coated with positive active materials of the battery on two sides.
The invention has the beneficial effects that:
if the anti-needling lithium battery suffers from needling, before the sharp needle penetrates into the inner ring of the battery coated with the battery active material, the outer ring and the secondary outer ring of the lithium battery are penetrated through, at the moment, a large amount of battery electric quantity can be rapidly consumed due to short circuit, so that the electric quantity of the lithium battery when the sharp needle penetrates into the inner ring of the battery coated with the battery active material is reduced to a safe level (SOC is lower than 40%), and the explosion of the battery is prevented.
Drawings
Fig. 1 is a schematic diagram of the development of the lithium battery with needle prick prevention.
I-outer ring, II-secondary outer ring, III-inner ring, 1-copper foil section, 2-thin diaphragm, 3-aluminum foil section, 4-thick diaphragm, 5-positive plate aluminum foil section coated with battery active material on the outer side, 6-winding needle, 7-positive plate aluminum foil section coated with battery active material on both sides, and 8-negative plate copper foil section coated with battery active material on both sides.
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
example 1
As shown in fig. 1, the anti-needle punching cylindrical lithium battery comprises an outer ring (I) of a battery inner core, a secondary outer ring (II) of the battery inner core, and an inner ring (III) of the rest part of the battery inner core. The battery inner core outer ring (I) comprises a positive plate aluminum foil section (3) with two surfaces not coated with positive active materials of a lithium battery, a negative plate copper foil section (1) with two surfaces not coated with negative active materials of the lithium battery and a thin diaphragm section (2). The thickness of the thin diaphragm section is 16 μm. The battery negative active material is artificial graphite.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with one side coated with positive active materials of the battery. The thickness of the thick membrane was 26 μm. The battery positive electrode active material is NCM 532.
The positive plate aluminum foil section (5) with one side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The inner ring (III) of the battery inner core is composed of a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (7) with two sides coated with positive active materials of the battery.
Example 2
The utility model provides a prevent acupuncture cylindrical lithium cell, the cylindrical lithium cell of preventing acupuncture contain battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core. The battery inner core outer ring (I) comprises a positive plate aluminum foil section (3) with two surfaces not coated with positive active materials of a lithium battery, a negative plate copper foil section (1) with two surfaces not coated with negative active materials of the lithium battery and a thin diaphragm section (2). The thickness of the thin diaphragm section is (16) mu m. The battery negative active material is natural graphite.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with one side coated with positive active materials of the battery. The thickness of the thick separator was (26) μm. The positive electrode active material of the battery is NCM 811.
The positive plate aluminum foil section (5) with one side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The inner ring (III) of the battery inner core is composed of a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (7) with two sides coated with positive active materials of the battery.
Example 3
The utility model provides a prevent acupuncture cylindrical lithium cell, the cylindrical lithium cell of preventing acupuncture contain battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core. The battery inner core outer ring (I) comprises a positive plate aluminum foil section (3) with two surfaces not coated with positive active materials of a lithium battery, a negative plate copper foil section (1) with two surfaces not coated with negative active materials of the lithium battery and a thin diaphragm section (2). The thickness of the thin diaphragm section is 16 μm. The battery negative active material is artificial graphite.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with one side coated with positive active materials of the battery. The thickness of the thick membrane was 26 μm. The battery positive electrode active material is NCA 811.
The positive plate aluminum foil section (5) with one side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The inner ring (III) of the battery inner core is composed of a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (7) with two sides coated with positive active materials of the battery.
Example 4
The utility model provides a prevent acupuncture cylindrical lithium cell, the cylindrical lithium cell of preventing acupuncture contain battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core. The battery inner core outer ring (I) comprises a positive plate aluminum foil section (3) with two surfaces not coated with positive active materials of a lithium battery, a negative plate copper foil section (1) with two surfaces not coated with negative active materials of the lithium battery and a thin diaphragm section (2). The thickness of the thin diaphragm section is 16 μm. The battery negative active material is silicon carbon.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with one side coated with positive active materials of the battery. The thickness of the thick membrane was 26 μm. The battery positive electrode active material is NCM 622.
The positive plate aluminum foil section (5) with one side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The inner ring (III) of the battery inner core is composed of a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (7) with two sides coated with positive active materials of the battery.
Example 5
The utility model provides a prevent acupuncture cylindrical lithium cell, the cylindrical lithium cell of preventing acupuncture contain battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core. The battery inner core outer ring (I) comprises a positive plate aluminum foil section (3) with two surfaces not coated with positive active materials of a lithium battery, a negative plate copper foil section (1) with two surfaces not coated with negative active materials of the lithium battery and a thin diaphragm section (2). The thickness of the thin diaphragm section is 16 μm. The battery negative active material is artificial graphite.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with one side coated with positive active materials of the battery. The thickness of the thick membrane was 26 μm. The battery anode active substance is lithium manganate.
The positive plate aluminum foil section (5) with one side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The inner ring (III) of the battery inner core is composed of a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (7) with two sides coated with positive active materials of the battery.
Example 6
The utility model provides a prevent acupuncture cylindrical lithium cell, the cylindrical lithium cell of preventing acupuncture contain battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core. The battery inner core outer ring (I) comprises a positive plate aluminum foil section (3) with two surfaces not coated with positive active materials of a lithium battery, a negative plate copper foil section (1) with two surfaces not coated with negative active materials of the lithium battery and a thin diaphragm section (2). The thickness of the thin diaphragm section is 16 μm. The battery negative active material is natural graphite.
The secondary outer ring (II) of the battery inner core comprises a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (5) with one side coated with positive active materials of the battery. The thickness of the thick membrane was 26 μm. The battery anode active material is lithium iron phosphate.
The positive plate aluminum foil section (5) with one side coated with the battery positive active material is a positive plate with the outward side surface of the positive plate aluminum foil section coated with the battery positive active material and the inward side surface coated with the battery positive active material.
The inner ring (III) of the battery inner core is composed of a negative plate copper foil section (8) with two sides coated with negative active materials of the lithium battery, a thick diaphragm section (4) and a positive plate aluminum foil section (7) with two sides coated with positive active materials of the battery.
If the anti-needling lithium battery suffers from needling, the lithium battery firstly penetrates through the outer ring and the secondary outer ring of the battery before the sharp needle penetrates into the battery inner core coated with the battery active substance, and at the moment, a large amount of battery electric quantity can be rapidly consumed due to short circuit, so that the electric quantity of the lithium battery is reduced to a safe level (the SOC is lower than 40%) when the sharp needle penetrates into the battery inner core coated with the battery active substance, and the battery is prevented from exploding.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, but rather as the subject matter of the invention is to be construed in all aspects and as broadly as possible, and all changes, equivalents and modifications that fall within the true spirit and scope of the invention are therefore intended to be embraced therein.
Claims (10)
1. The utility model provides a prevent acupuncture cylinder type lithium cell which characterized in that, prevent acupuncture cylinder type lithium cell include battery inner core outer lane (I), battery inner core secondary outer lane (II) and the inner circle (III) of the rest of battery inner core.
2. The anti-needling cylindrical lithium battery according to claim 1, wherein the outer ring (I) of the battery core comprises a positive plate aluminum foil section (3) with both sides not coated with the positive active material of the lithium battery, a negative plate copper foil section (1) with both sides not coated with the negative active material of the lithium battery, and a thin diaphragm section (2).
3. The lithium battery of claim 2, wherein the thin separator section has a thickness of 12-18 μm.
4. The anti-needling cylindrical lithium battery as claimed in claim 2, wherein the battery negative electrode active material is one or more of natural graphite, artificial graphite, lithium titanate and silicon carbon active material, and the silicon carbon active material is a silicon carbon composite, and comprises silicon-based amorphous carbon, silicon-based amorphous carbon-graphite, silicon-based amorphous carbon-graphene, silicon-based amorphous carbon-carbon nanotube, silicon-based graphene or metal oxide doped silicon carbon composite.
5. The anti-needling cylindrical lithium battery as claimed in claim 1, wherein the inner core secondary outer ring (II) of the battery comprises a negative plate copper foil section (8) coated with negative active materials of the lithium battery on both sides, a thick diaphragm section (4), and a positive plate aluminum foil section (5) coated with positive active materials of the battery on one side.
6. A lithium battery of the cylinder type with protection against needle punching as claimed in claim 5, characterized in that the thick separator section (4), the thick separator has a thickness of 24-28 μm.
7. The anti-needling cylindrical lithium battery as claimed in claim 5, wherein the positive active material of the battery is one or more of lithium metal oxide with a layered structure, lithium-free metal oxide, lithium metal oxide with a spinel structure, lithium metal phosphate, lithium metal fluoride sulfate and lithium metal vanadate.
8. A needlestick prevention device as claimed in claim 7The lithium battery is characterized in that the lithium metal oxide with the layered structure is selected from Lithium Cobaltate (LCO), nickel-cobalt-manganese ternary material (NCM) and nickel-cobalt-aluminum ternary material (NCA); the lithium-free metal oxide may be selected from V2O5Or MnO2(ii) a The spinel-structured lithium metal oxide may be selected from lithium manganate (LiMn)2O4) (ii) a The lithium metal phosphate may be selected from lithium iron phosphate (LFP); the lithium metal fluorinated sulfate may be selected from the group consisting of fluorinated lithium cobalt sulfate (LiCoFSO)4) (ii) a The lithium metal vanadate may be selected from nickel lithium vanadate (LiNiVO)4)。
9. The anti-needling cylindrical lithium battery according to claim 5, wherein the positive plate aluminum foil section (5) coated with the positive active material of the battery on one side is a positive plate coated with the positive active material of the battery on the outward side and not coated with the positive active material of the battery on the inward side of the positive plate aluminum foil section.
10. The anti-needling cylindrical lithium battery as claimed in claim 1, wherein the inner core (iii) comprises a copper foil section (8) of negative electrode sheet coated with negative active material of lithium battery on both sides, a thick diaphragm section (4), and an aluminum foil section (7) of positive electrode sheet coated with positive active material of battery on both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343956.0A CN110994036A (en) | 2019-12-24 | 2019-12-24 | Prevent acupuncture cylinder type lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911343956.0A CN110994036A (en) | 2019-12-24 | 2019-12-24 | Prevent acupuncture cylinder type lithium cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110994036A true CN110994036A (en) | 2020-04-10 |
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| CN113437408A (en) * | 2021-05-07 | 2021-09-24 | 东莞市振华新能源科技有限公司 | Manufacturing method of anti-needling lithium battery |
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