CN109119681A - A kind of highly secure lithium ion battery - Google Patents
A kind of highly secure lithium ion battery Download PDFInfo
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- CN109119681A CN109119681A CN201811071746.6A CN201811071746A CN109119681A CN 109119681 A CN109119681 A CN 109119681A CN 201811071746 A CN201811071746 A CN 201811071746A CN 109119681 A CN109119681 A CN 109119681A
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- Prior art keywords
- ion battery
- lithium ion
- aluminium foil
- defect
- high safety
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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
- H01M10/052—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
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/661—Metal or alloys, e.g. alloy coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention belongs to field of lithium ion battery, and in particular to a kind of lithium ion battery of high safety.Lithium ion battery is made as plus plate current-collecting body using the aluminium foil for containing groove, indentation, etch pit, laser hole, braiding hole or other defects, especially lithium ion battery with high energy density includes but are not limited to ternary lithium ion battery, ferric phosphate lithium ion battery.The present invention by using the aluminium foil containing defect as lithium ion battery made of plus plate current-collecting body, in needle thorn, formed it is less split cutting edge of a knife or a sword and burr, the formation of internal short-circuit is reduced, to improve the safety of acupuncture of lithium ion battery.Test result shows the ternary lithium ion battery using the above-mentioned aluminium foil containing defect, in needle thorn safety be improved significantly, while electrical property can be taken into account.
Description
Technical field
The invention belongs to field of lithium ion battery, in particular to a kind of highly secure lithium ion battery.
Background technique
Lithium ion battery has many advantages, such as high energy density and cycle efficieny, low self-discharge, memory-less effect, in power
It has broad application prospects in terms of battery.Currently, many car manufacturers select lithium ion battery as electric car
Electrical source of power, be proposed the electric car of oneself brand and model.Electric car as a kind of vehicles, continual mileage,
Accelerating ability, security performance etc. are the emphasis that everybody pays close attention to, and these aspects depend primarily on the performance of power battery, concentrate on
Energy density, power density, cycle life, safety etc..
Lithium ion battery with high energy density has a clear superiority on continual mileage, and at the same time, bring is safe therewith
Property hidden danger also becomes everybody focus of attention.Therefore, the safety for improving lithium ion battery is concerning high energy density lithium ion
Battery is in the widely applied key precondition in electrical source of power field, and one of hot spot direction studied at present.
In the various abuse conditions of assessment lithium ion battery security, needle thorn is one of abuse conditions the harshest,
It is also one of the common invalidation of lithium ion battery safety test.There are four types of short-circuit modes for internal short-circuit caused by needle pierces: anode-
Cathode, aluminium foil-cathode, copper foil-anode, aluminium foil-copper foil.Existing research shows this short-circuit mode thermal discharge of aluminium foil-cathode most
It greatly, is the main source of acupuncture course internal short-circuit generation heat.The reason is that, the resistivity of aluminium foil, cathode membrane is smaller, contact
When can generate huge short circuit current, moment generates biggish heat and converges at short dot, can cause serious thermal runaway.Cause
This, reduces aluminium foil-cathode membrane shorted contacts, is the effective way for improving safety of acupuncture to reduce needle thorn internal short-circuit heat production
Diameter.
Currently, the means for improving lithium ion battery safety of acupuncture specifically include that electrolysis additive, insulation/fire-retardant painting
Layer, PTC coating, vest structure, functional structure cover board etc..
Patent CN202817080U discloses a kind of anti-needling structure battery core of lithium ion battery and its lithium ion battery, specifically
The anti-needling structure battery core of lithium ion battery is disclosed, positive and negative pole surface is respectively with coating, and at the positive and negative anodes of winding-structure end
End increases separately a whole circle screening glass, and screening glass is substantially collector, constitutes vest structure, in needle thorn on the outside of battery core
It is initially formed short dot, electric current is guided on the outside of battery core, consumes part electricity, and heat rapid divergence is gone out, this structure pair
It can play the role of certain anti-needling action in certain capacity and the battery of system, but for lithium ion battery with high energy density
It is limited.
Patent CN104409681 A discloses a kind of preparation method of the electrodes of lithium-ion batteries of coating containing PTC, specific public
Before having opened the slurry that coating on a current collector includes positive or negative pole active material, coating has temperature on a current collector in advance
The precoated shet of sensibility, includes binder, PTC material and conductive agent in the precoated shet, at room temperature precoated shet
Electric conductivity is good, and when the temperature increases, resistance steeply rises, and electron transfer speed reduces, and prevents battery from further heating up, thus
Improve the safety of lithium ion battery.But since needle thorn thermal runaway moment occurs, the mechanism of action of the coating often has little time
It works, cannot play the role of effectively improving safety of acupuncture.
Patent CN104966840 A discloses a kind of anode current collector of lithium ion battery and preparation method thereof of high security
With lithium ion battery.Specifically disclose the aluminium foil that surface is covered with one layer of porous aluminas, and the lithium-ion electric using this aluminium foil
The alumina layer in pond, the aluminium foil surface is prepared using the method for electrochemical oxidation, containing through-hole+blind hole structure, passes through oxidation
The biggish characteristic of the resistance of aluminium reduces resistance value when battery internal short-circuit, to reduce heat production.The shortcoming of this method exists
In in battery normal use, the internal resistance of cell is higher, influences electrical property.
Therefore, for this problem of the safety of acupuncture of lithium ion battery is improved, wait it is further proposed that effective solution
Scheme.
Summary of the invention
It is an object of the invention to for lithium ion battery, especially high-energy density ternary lithium ion battery security compared with
The deficiency of difference proposes a kind of lithium ion battery that can improve safety of acupuncture, combine electrical property.
The technical solution of the present invention is as follows: preparing lithium ion battery as plus plate current-collecting body using the aluminium foil containing defect, it is used for
Improve lithium ion battery safety of acupuncture.
A kind of lithium ion battery of high safety is using the aluminium foil containing defect as lithium-ion electric made of plus plate current-collecting body
Pond, especially lithium ion battery with high energy density include but are not limited to ternary lithium ion battery, ferric phosphate lithium ion electricity
Pond.
The lithium ion battery of the high safety, including anode pole piece, cathode pole piece, diaphragm, electrolyte, shell, it is described just
Pole pole piece includes plus plate current-collecting body and positive diaphragm, and the plus plate current-collecting body is the above-mentioned aluminium foil containing defect.
The aluminium foil containing defect are as follows: the aluminium containing groove, indentation, etch pit, laser hole, braiding hole or other defects
Foil；
Signified defect in the aluminium foil containing defect includes but are not limited to burn into etching, punching press, laser irradiation, volume
The defect prepared by techniques such as knit；
Signified defect in the aluminium foil containing defect, including through-hole and/or blind hole；
Preferably, the spacing of the defect is 10-1000 μm, and flaw size is 1-100 μm；
Preferably, the aluminum foil thickness containing defect are as follows: 6-20 μm；
Preferably, the defect is arranged in regular shape, includes but are not limited to lattice-like, annular shape, radial etc..
The invention has the benefit that the present invention by using the aluminium foil containing defect as plus plate current-collecting body, in needle thorn,
Due to the effect of defect, part burr/split cutting edge of a knife or a sword falls off, formed it is less split cutting edge of a knife or a sword and burr, reduce aluminium foil and copper foil/cathode contact
Area, so that current value when reducing needle thorn internal short-circuit, reduces quantity of heat production and rate of heat production, finally can be improved safety of acupuncture
Property.
Aluminium foil of the present invention containing defect keeps preferable mechanical property macroscopically still in continuous state
Can, therefore, the processing performances such as coating, roll-in are influenced smaller；Meanwhile the above-mentioned aluminium foil containing defect due to defect area it is smaller,
Preferable conveyance capacity is maintained as plus plate current-collecting body, therefore, internal resistance, multiplying power for electron transfer angle, to battery
Etc. performances adverse effect it is smaller, on the other hand, the presence of partial through holes is conducive to the transmission of lithium ion, therefore is conducive to times
The promotion of rate performance.
In conclusion using the lithium ion battery of the preparation of aluminium foil containing defect while safety of acupuncture with higher,
With preferable electrical property.
Detailed description of the invention
Fig. 1 is the burr situation map of dismantling pole piece after the thorn of battery needle made from comparative example 1；
Fig. 2 is the burr situation map of dismantling pole piece after the thorn of battery needle made from embodiment 1；
Fig. 3 is that the defect shape on aluminium foil is in regular lattice-like distribution schematic diagram；
Fig. 4 is that the defect shape on aluminium foil is in the circular distribution schematic diagram of rule；
Fig. 5 is that the defect shape on aluminium foil is in regular radial distribution schematic diagram.
Specific embodiment
In order to better explain the present invention, below with specific embodiment come the technical solution that the present invention will be described in detail, but simultaneously
It is not as a limitation of the invention.
Embodiment 1
Using the aluminium foil for containing etch pit (through-hole+blind hole) obtained through super-corrosion process as plus plate current-collecting body, aluminium foil
On etch pit be in regular lattice arrangement, 10-100 μm of etch pit size, 100-1000 μm of spacing, 15 μm of aluminum foil thickness.Using
(60%) NCM622, Ni content are about used as positive electrode to commercially available nickle cobalt lithium manganate, commercially available electrographite is used as negative electrode material
Conventional type electrolyte (contains solvent EC:EMC:DEC=3:5:2 (wt%), 1mol/L LiPF6And 2%VC is as addition
Agent) and ceramic diaphragm (12 microns of+4 microns of thickness PE basement membrane thick ceramic layers), lithium ion soft-package battery, capacity 10Ah or so is made.
Embodiment 2
Using the aluminium foil for containing punching hole (through-hole) obtained by Sheet Metal Forming Technology as plus plate current-collecting body, rushing on aluminium foil
Pressing hole is in regular lattice arrangement, 10-50 μm of punching press pore size, and 50-200 μm of spacing, 15 μm of aluminum foil thickness.Using with above-mentioned implementation
The identical material system of example 1 prepares lithium ion battery, capacity 10Ah or so.
Embodiment 3
Indentation using the aluminium foil for containing indentation (blind hole) obtained by etching technics as plus plate current-collecting body, on aluminium foil
In regular circular row, 1-50 μm of pore size, 20-100 μm of spacing, 15 μm of aluminum foil thickness.Using identical as above-described embodiment 1
Material system prepare lithium ion battery, capacity 10Ah or so.
Embodiment 4
It is sharp on aluminium foil using the aluminium foil for contain laser hole (through-hole) obtained by laser irradiation as plus plate current-collecting body
Unthreaded hole is in the radial arrangement of rule, and 10-25 μm of pore size, 200-1000 μm of spacing, 20 μm of aluminum foil thickness.Using with above-mentioned implementation
The identical material system of example 1 prepares lithium ion battery, capacity 10Ah or so.
Embodiment 5
Contain volume of the aluminium foil for weaving hole (through-hole) as plus plate current-collecting body, on aluminium foil using what is obtained by weaving
Knitting hole is in regular lattice arrangement, and 50-100 μm of pore size, 200-1000 μm of spacing, 20 μm of aluminum foil thickness.Using with above-mentioned implementation
The identical material system of example 1 prepares lithium ion battery, capacity 10Ah or so.
Comparative example 1
Using 15 μm of thickness of conventional aluminium foil.Lithium ion battery is prepared using material system identical with above-described embodiment 1,
Capacity is consistent.
Comparative example 2
Using the aluminium foil for containing etch pit (through-hole+blind hole) obtained through super-corrosion process as plus plate current-collecting body, aluminium foil
On etch pit be in regular lattice arrangement, 1-10 μm of etch pit size, 1000-1200 μm of spacing, 15 μm of aluminum foil thickness.Using with
The identical material system of above-described embodiment 1 prepares lithium ion battery, and capacity is consistent.
Comparative example 3
Using the aluminium foil for containing punching hole (through-hole) obtained by Sheet Metal Forming Technology as plus plate current-collecting body, rushing on aluminium foil
Pressing hole is in regular lattice arrangement, 100-150 μm of punching press pore size, and 200-1000 μm of spacing, 15 μm of aluminum foil thickness.Using with it is above-mentioned
The identical material system of embodiment 1 prepares lithium ion battery, and capacity is consistent.
Above-described embodiment and comparative example carry out electric performance test according to same test condition progress lancing test.
Lancing test condition: diameter 10mm steel needle, speed 3mm/s after being pierced into battery, stop 10min in inside battery, see
Phenomenon is examined, video, positive and negative pole tension, positive and negative tab, pin hole temperature nearby are recorded.
Test result comparison is as shown in table 1.
Table 1
Test result shows the ternary lithium ion battery using the above-mentioned aluminium foil containing defect, and in needle thorn, safety is obtained bright
It is aobvious to improve.Needle thorn after battery dismantling analysis shows, the needle of aluminium foil containing defect thorn after burr it is less, partially split cutting edge of a knife or a sword and fall off, edge relatively put down
Whole, burr is more after normal aluminium foil needle thorn, as shown in Figure 1, 2.
Using lithium ion battery prepared by method provided by the invention, compared with conventional sample, safety of acupuncture is obtained
Large increase, while being able to maintain electrical property and do not reduce.The present invention can be used for the safety of acupuncture of lithium ion battery with high energy density
Property improve.
Claims (8)
1. a kind of lithium ion battery of high safety, including anode pole piece, cathode pole piece, diaphragm, electrolyte, shell, wherein anode
Pole piece includes plus plate current-collecting body and positive diaphragm, which is characterized in that lithium is made as plus plate current-collecting body using the aluminium foil containing defect
Ion battery.
2. the lithium ion battery of high safety as described in claim 1, which is characterized in that lithium ion battery made of described is high energy
Metric density lithium ion battery, including but not limited to ternary lithium ion battery, ferric phosphate lithium ion battery.
3. the lithium ion battery of high safety as described in claim 1, which is characterized in that the aluminium foil containing defect are as follows: contain ditch
Slot, indentation, etch pit, laser hole, the aluminium foil for weaving hole or other defects.
4. the lithium ion battery of high safety as described in claim 1, which is characterized in that signified in the aluminium foil containing defect to lack
It falls into, includes but are not limited to burn into etching, punching press, laser irradiation, defect prepared by weaving.
5. the lithium ion battery of high safety as described in claim 1, which is characterized in that the defect is arranged in regular shape, packet
Include but be not limited only to lattice-like, annular shape, radial.
6. the lithium ion battery of high safety as described in claim 1, which is characterized in that signified in the aluminium foil containing defect to lack
It falls into, including through-hole and/or blind hole.
7. the lithium ion battery of high safety as described in claim 1, which is characterized in that the spacing of the defect is 10-1000 μm,
Flaw size is 1-100 μm.
8. the lithium ion battery of high safety as described in claim 1, which is characterized in that the aluminum foil thickness containing defect are as follows: 6-
20μm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071746.6A CN109119681A (en) | 2018-09-14 | 2018-09-14 | A kind of highly secure lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811071746.6A CN109119681A (en) | 2018-09-14 | 2018-09-14 | A kind of highly secure lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN109119681A true CN109119681A (en) | 2019-01-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811071746.6A Withdrawn CN109119681A (en) | 2018-09-14 | 2018-09-14 | A kind of highly secure lithium ion battery |
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| CN (1) | CN109119681A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695900A (en) * | 2022-05-31 | 2022-07-01 | 江苏卓高新材料科技有限公司 | Composite current collector, positive pole piece and preparation method of positive pole piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200959346Y (en) * | 2006-09-27 | 2007-10-10 | 万向电动汽车有限公司 | Polymer lithium-ion power battery |
| CN101364644A (en) * | 2007-08-10 | 2009-02-11 | 深圳市比克电池有限公司 | Lithium battery current collecting body, high capacity cylindrical lithium ionic cell and preparation |
| CN103165901A (en) * | 2011-12-15 | 2013-06-19 | 罗栋 | Pole piece substrate and pole piece of lithium battery, and preparation method thereof |
| CN106654289A (en) * | 2016-12-29 | 2017-05-10 | 深圳先进技术研究院 | Porous aluminum-foil cathode, preparation method of porous aluminum-foil cathode and lithium secondary battery |
| CN207353383U (en) * | 2017-11-10 | 2018-05-11 | 宁德时代新能源科技股份有限公司 | Collector, electrode plates and lithium ion battery |
-
2018
- 2018-09-14 CN CN201811071746.6A patent/CN109119681A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200959346Y (en) * | 2006-09-27 | 2007-10-10 | 万向电动汽车有限公司 | Polymer lithium-ion power battery |
| CN101364644A (en) * | 2007-08-10 | 2009-02-11 | 深圳市比克电池有限公司 | Lithium battery current collecting body, high capacity cylindrical lithium ionic cell and preparation |
| CN103165901A (en) * | 2011-12-15 | 2013-06-19 | 罗栋 | Pole piece substrate and pole piece of lithium battery, and preparation method thereof |
| CN106654289A (en) * | 2016-12-29 | 2017-05-10 | 深圳先进技术研究院 | Porous aluminum-foil cathode, preparation method of porous aluminum-foil cathode and lithium secondary battery |
| CN207353383U (en) * | 2017-11-10 | 2018-05-11 | 宁德时代新能源科技股份有限公司 | Collector, electrode plates and lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114695900A (en) * | 2022-05-31 | 2022-07-01 | 江苏卓高新材料科技有限公司 | Composite current collector, positive pole piece and preparation method of positive pole piece |
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