CN109037684A - A kind of internal oxygen self-absorption safe lithium battery - Google Patents
A kind of internal oxygen self-absorption safe lithium battery Download PDFInfo
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- CN109037684A CN109037684A CN201810712193.1A CN201810712193A CN109037684A CN 109037684 A CN109037684 A CN 109037684A CN 201810712193 A CN201810712193 A CN 201810712193A CN 109037684 A CN109037684 A CN 109037684A
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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
- H01M10/42—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
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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
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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
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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- 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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- 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 present invention provides a kind of internal oxygen self-absorption safe lithium battery, which includes positive plate, negative electrode tab；The positive plate is by including that the raw material of following parts by weight is made: 90-97 parts of positive electrode active materials, 0.5-4 parts of positive conductive agent, 0.5-3 parts of positive electrode binder, positive solvent 15-70 parts；The positive plate further includes oxygen absorption additive, and the additive amount of the oxygen absorption additive is the 0.01-10% of the total amount of positive electrode active materials, positive conductive agent and positive electrode binder.Internal oxygen self-absorption safe lithium battery of the present invention is in the oxygen absorption additive being evenly mixed in positive electrode, when positive electrode active materials occur to decompose under high temperature and discharge oxygen, ambient oxygen can quickly be captured, oxygen concentration inside when reduction lithium battery thermal runaway, so that lithium battery is unable to satisfy condition on fire, avoids lithium battery thermal runaway on fire.
Description
Technical field
The invention belongs to field of lithium, more particularly, to a kind of internal oxygen self-absorption safe lithium battery.
Background technique
New-energy automobile market is fast-developing, and lithium battery is got a lot of applications.With the popularization of new-energy automobile, people
Higher course continuation mileage requirement is proposed to new-energy automobile.It is required to be able to satisfy high continuation of the journey, it is necessary to improve the energy of battery
Density.Current main technology path is and the height of positive electrode by nickelic, high-voltage anode material, silicium cathode material etc.
Gram volume is promoted, while the problem of bringing is exactly thermostabilization decline.Lead to the problem of is exactly under high energy density cells safety
Drop.
The thermal runaway of verified lithium battery is on fire, usually in 100-200 DEG C of cathode thermal runaway heat release first, the heat into
One step heats anode, and when temperature reaches positive decomposition temperature, anode, which is decomposed, heat release and discharges oxygen, at this time in battery core
Portion meets three conditions on fire, 1, combustible (positive and negative anodes, electrolyte, diaphragm)；2, the oxidizer (oxygen of positive polar decomghtion release
Gas)；3, reach ignition point (heat that lithium battery system thermal runaway is released).Final cause causes battery core on fire.
Currently, lithium battery safe design mainly improves in terms of System Design, it is generally higher by using thermal stability
Positive and negative pole material, the electrolyte with flame retarding function, high-melting-point diaphragm, ceramic-coated separator, the coating of cathode ceramic surface, anode
Tab ceramic coated, PTC additive etc..And the above safety measure main function is to avoid the generation of battery thermal runaway or reduce hot
Thermal discharge when generation out of control reaches ignition point to avoid battery.But if there is external heat source persistently heats battery core,
It is on fire that lithium battery finally can also trigger thermal runaway.
Summary of the invention
In view of this, the present invention is directed to propose a kind of internal oxygen self-absorption safe lithium battery, can quickly capture surrounding
Oxygen, reduce lithium battery thermal runaway when inside oxygen concentration.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of internal oxygen self-absorption safe lithium battery, the lithium battery include positive plate, negative electrode tab；
The positive plate is by including that the raw material of following parts by weight is made:
The positive plate further includes oxygen absorption additive, and the additive amount of the oxygen absorption additive is that anode is living
The 0.01-10% of the total amount of property material, positive conductive agent and positive electrode binder；
The oxygen absorption additive is one of alumino-silicate, zeolite, active carbon, carbon black or molecular sieve.
Further, the aperture of the oxygen absorption additive is 0.2-10nm；The ruler of the oxygen absorption additive
Very little is 1-5mm.
Further, the positive electrode active materials are lithium-transition metal composite oxide；The lithium transition-metal is compound
Oxide is LiMxOy or LiMxPO4At least one of, wherein combination of the M for one or more of transition metal, 0≤x≤3,
0≤y≤4；The lithium-transition metal composite oxide is LiMn2O4、LiNiO2、LiCoO2、LiNi0.5Co0.2Mn0.3O2、
LiFePO4Or LiVPO4At least one of.
Further, the positive conductive agent is one of carbon black, carbon nanotube, graphene or electrically conductive graphite or a variety of
Combination；The positive electrode binder is Kynoar (PVDF)；The positive solvent is N-Methyl pyrrolidone (NMP).
Further, the negative electrode tab is by including that the raw material of following parts by weight is made:
Further, the negative electrode active material is lithium alloy, carbon, petroleum coke, active carbon, graphite, carbon fiber, silicon or carbon
At least one of nanotube；The cathode conductive agent is at least one in carbon black, carbon nanotube, graphene or electrically conductive graphite
Kind；The negative electrode binder is the combination of CMC and SBR；The cathode solvent is deionized water.
Further, the lithium battery further includes membrane structure, and the membrane structure is in polyolefin, polypropylene or PET
One kind be substrate, using ceramics or boehmite as the micro-pore septum of coating；The membrane structure with a thickness of 6-30um, porosity
For 25-65%, air permeability 100-1000sec/100cc.
Further, the lithium battery further includes electrolyte, and the electrolyte is by the raw material system including following parts by weight
At:
75-90 parts of electrolyte solvent,
8-20 parts of electrolyte lithium salts,
0.2-10 parts of film for additive.
Further, the electrolyte solvent is ethylene carbonate (EC), propene carbonate (PC), butylene, ɑ-
Butyrolactone, ɑ-valerolactone, dimethyl carbonate (DMC), diethyl carbonate (DEC), methyl ethyl carbonate (EMC), diethoxyethane
Or at least one of 1,3- dioxolane；The electrolyte lithium salts is LiPF6、LiBF4、LiClO4、LiBOB、LiN
(CF3SO2)2、Li(CF3SO2)3At least one of；The film for additive is sour vinylene (VC) or sulfurous acid propylene
At least one of ester (PS).
Further, the cathode metal collector of the positive plate is aluminium foil；The negative metal afflux of the negative electrode tab
Body is copper foil.
The preparation method of the positive plate, includes the following steps:
(1) positive electrode binder is dissolved in the positive solvent of first part and is stirred evenly, until positive electrode binder is all molten
Solution, is made positive glue；
(2) the positive solvent of second part, positive conductive agent and oxygen absorption additive are stirred evenly；
(3) the positive liquid cement agitation that 50% prepared is added thereto is uniform；
(4) positive electrode active materials are added to stir evenly；
(5) the positive liquid cement agitation of residue 50% is added, anode sizing agent is uniformly made.
(6) anode sizing agent be coated, toasted, rolled, is punched, welding step to obtain the final product；
The positive solvent of the positive solvent and second part of the first part the sum of for total positive solvent plus
Enter amount.
The preparation method of the negative electrode tab, includes the following steps:
(1) negative electrode binder is dissolved in the cathode solvent of first part and is stirred evenly, until negative electrode binder is all molten
Solution, is made cathode glue；
(2) the cathode solvent of second part, cathode conductive agent, cathode liquid cement agitation is uniform, negative electrode slurry is made；
(3) negative electrode slurry be coated, toasted, rolled, is punched, welding step to obtain the final product；
The cathode solvent of the cathode solvent and second part of the first part the sum of for total cathode solvent plus
Enter amount.
Battery production: battery core is made in the positive plate prepared, negative electrode tab and diaphragm zigzag lamination, is encapsulated in plastic-aluminum packet
In pack, through 85 DEG C vacuum bakeout 15 hours.Fluid injection, vacuum seal.By after fluid injection battery room temperature stand 24 hours, then into
Row high-temperature clamp preliminary filling, room temperature aging 14 days, partial volume, is selected high temperature ageing 48h, Degas.
Oxygen absorption additive is added in lithium battery anode, when positive pyrolytic discharges oxygen, can be mixed into just
The oxygen absorption additive of pole quickly absorbs.The condition of second oxidizer in condition on fire is set to be unable to get satisfaction, at this time lithium
Although thermal runaway heat release can occur for battery, since oxygen deficiency is without on fire, the heat that simple thermal runaway is released is far low
In the harm that thermal runaway is on fire.Oxygen absorption additive is added in positive homogenized phase, is being coated with, is rolling, toasting, is assembling rank
Section, the oxygen absorption additive can absorb the oxygen in air and reach saturation.When battery core is completed to assemble, when carrying out Degas process,
The oxygen that oxygen absorption additive absorbs can be deviate from again, caught up in lithium battery airbag, be then discharged out.Oxygen absorption adds at this time
Add agent to have good absorption oxygen functionality protection lithium battery again, absorbs positive electrode active materials release in time in thermal runaway
Oxygen does not occur that lithium battery on fire.
There are many duct of uniform pore diameter and the holes of marshalling in structure for oxygen absorption additive, have adsorption energy
Power.The material of different pore size, specific aim binding molecule kinetic diameter are less than the molecule of the aperture size.Have it is more highly polar,
The molecule of polar functionalities can be adsorbed.
A variety of materials can be touched in our production and living and scientific research, wherein in addition to steel, glass etc. are a small number of close
Outside real material, for most materials in inside with the presence of some ducts, there is different cry in these ducts on different subjects
Method, representative meaning are also different.
In the research of porous material, hole refers to aperture and closed pore in material.Wherein, the cavity that is in communication with the outside and
Duct is known as aperture, and what is be not in communication with the outside is known as closed pore.Concept associated therewith is such as: aperture, Kong Rong, pore size distribution, hole body
Product etc., the volume that this some holes occupies may be also bigger than material composition of material itself, come in every shape, diameter also each not phase
Together.The size of the venturi of this some holes, the different of distribution and various geometries, so that each not phase of the physical property of material
Together, to produce different use.
Hole is more flourishing, pore morphology is more complicated, and the specific surface area of material internal can be made bigger.It is illustrated, is led to active carbon
The bamboo absorbent charcoal of KOH activation preparation is crossed, specific surface area maximum can achieve 2752m2/ g, that is to say, that 1 gram of active carbon is wrapped
The specific surface area contained almost can achieve the area of a normal soccer field.
It, can be by material by the gas molecule in the hole in material due to the presence of intermolecular attraction (mainly Van der Waals force)
The molecule of inner bore surface is attracted, that is, is adsorbed.When the specific surface area of material is bigger, pass through the gas in its hole and material
Contact area is also bigger, and the gas molecule that can be accommodated will be more.And when pore morphology is more complicated, especially work as gas
When body molecular diameter is slightly less than the bore dia of material, gas molecule is very difficult to run out after encountering the material molecule of hole surface,
It is not easy to be desorbed.In this case, pore structure is more flourishing, and pore morphology is more complicated, when especially micropore ratio is big, material
Specific surface area it is bigger, therefore the amount of gas of the material absorption of unit mass will be bigger, the adsorption function of material for gaseous
It is stronger.
Compared with the existing technology, internal oxygen self-absorption safe lithium battery of the present invention has the advantage that
(1) internal oxygen self-absorption safe lithium battery of the present invention is inhaled in the oxygen being evenly mixed in positive electrode
Additive is received, when positive electrode active materials occur to decompose under high temperature and discharge oxygen, ambient oxygen can be quickly captured, reduce lithium
Oxygen concentration inside when battery thermal runaway makes lithium battery be unable to satisfy condition on fire, avoids lithium battery thermal runaway on fire.
(2) oxygen absorption additive of the present invention is provided simultaneously with adsorption dynamics adsorption kinetics diameter less than the additive aperture ruler
Very little molecule, such as absorbs water, and battery core cycle life can be improved in the moisture in material absorption battery core.
Detailed description of the invention
Fig. 1 is the thermal runaway security test curve graph of the embodiment of the present invention 1；
Fig. 2 is the thermal runaway security test curve graph of the embodiment of the present invention 2；
Fig. 3 is the thermal runaway security test curve graph of comparative example 1 of the present invention.
Specific embodiment
In addition to being defined, technical term used in following embodiment has universal with those skilled in the art of the invention
The identical meanings of understanding.Test reagent used in following embodiment is unless otherwise specified conventional biochemical reagent；It is described
Experimental method is unless otherwise specified conventional method.
Below with reference to examples and drawings, the present invention will be described in detail.
Embodiment 1
A kind of internal oxygen self-absorption safe lithium battery, the lithium battery include positive plate, negative electrode tab；The positive plate by
Raw material including following parts by weight is made: LiNi0.5Co0.2Mn0.3O294kg, carbon black 3kg, PVDF 2kg, NMP 70kg are living
Property charcoal 2kg；The pore diameter range of active carbon is 0.3-0.6nm；The size of the oxygen absorption additive is 10-100um；
The negative electrode tab is by including that the raw material of following parts by weight is made: graphite 50kg, CMC 0.80kg, SBR
1.0kg, carbon black 0.7kg, deionized water 60kg.
The lithium battery further includes membrane structure, and the membrane structure is polyolefin substrate thickness 12um, aluminum oxide coating layer
The micro-pore septum of thickness 4um.
The lithium battery further includes electrolyte, and the electrolyte is mixed EC, PC, EMC by the volume ratio of 35:5:60,
LiPF is added by the lithium salt of 1.0M6, it is separately added into the VC of 1% mass fraction of electrolyte and the PS of 1% mass fraction, is stirred
Electrolyte is sufficiently made.
The cathode metal collector of the positive plate is aluminium foil；The negative metal collector of the negative electrode tab is copper
Foil.
The production of lithium ion battery: being made battery core for the positive plate prepared, negative electrode tab and diaphragm zigzag lamination, encapsulation
In aluminium plastic packaging bag, through 85 DEG C vacuum bakeout 15 hours.Fluid injection, vacuum seal.It is small that battery room temperature after fluid injection is stood 24
When, it then carries out high-temperature clamp preliminary filling, high temperature ageing 48h, Degas, room temperature aging 14 days, partial volume, select.
Embodiment 2
A kind of internal oxygen self-absorption safe lithium battery, the lithium battery include positive plate, negative electrode tab；The positive plate by
Raw material including following parts by weight is made: LiNi0.5Co0.2Mn0.3O294kg, carbon black 3kg, PVDF 2kg, NMP 70kg are living
Property charcoal 4kg；The aperture of active carbon is 0.3-0.6nm；The size of the oxygen absorption additive is 10-100um；
The negative electrode tab is by including that the raw material of following parts by weight is made: graphite 50kg, CMC 0.80kg, SBR
1.0kg, carbon black 0.7kg, deionized water 60kg.
The lithium battery further includes membrane structure, and the membrane structure is polyolefin substrate thickness 12um, aluminum oxide coating layer
The micro-pore septum of thickness 4um.
The lithium battery further includes electrolyte, and the electrolyte is mixed EC, PC, EMC by the volume ratio of 35:5:60,
LiPF is added by the lithium salt of 1.0M6, it is separately added into the VC of 1% mass fraction of electrolyte and the PS of 1% mass fraction, is stirred
Electrolyte is sufficiently made.
The cathode metal collector of the positive plate is aluminium foil；The negative metal collector of the negative electrode tab is copper
Foil.
The production of lithium ion battery: being made battery core for the positive plate prepared, negative electrode tab and diaphragm zigzag lamination, encapsulation
In aluminium plastic packaging bag, through 85 DEG C vacuum bakeout 15 hours.Fluid injection, vacuum seal.It is small that battery room temperature after fluid injection is stood 24
When, it then carries out high-temperature clamp preliminary filling, high temperature ageing 48h, Degas, room temperature aging 14 days, partial volume, select.
Comparative example 1
A kind of internal oxygen self-absorption safe lithium battery, the lithium battery include positive plate, negative electrode tab；The positive plate by
Raw material including following parts by weight is made: LiNi0.5Co0.2Mn0.3O294kg, carbon black 3kg, PVDF 2kg, NMP 70kg；
The negative electrode tab is by including that the raw material of following parts by weight is made: graphite 50kg, CMC 0.80kg, SBR
1.0kg, carbon black 0.7kg, deionized water 60kg.
The lithium battery further includes membrane structure, and the membrane structure is polyolefin substrate thickness 12um, aluminum oxide coating layer
The micro-pore septum of thickness 4um.
The lithium battery further includes electrolyte, and the electrolyte is mixed EC, PC, EMC by the volume ratio of 35:5:60,
LiPF is added by the lithium salt of 1.0M6, it is separately added into the VC of 1% mass fraction of electrolyte and the PS of 1% mass fraction, is stirred
Electrolyte is sufficiently made.
The cathode metal collector of the positive plate is aluminium foil；The negative metal collector of the negative electrode tab is copper
Foil.
The production of lithium ion battery: being made battery core for the positive plate prepared, negative electrode tab and diaphragm zigzag lamination, encapsulation
In aluminium plastic packaging bag, through 85 DEG C vacuum bakeout 15 hours.Fluid injection, vacuum seal.It is small that battery room temperature after fluid injection is stood 24
When, it then carries out high-temperature clamp preliminary filling, high temperature ageing 48h, Degas, room temperature aging 14 days, partial volume, select.
Thermal runaway method for testing security:
100%SOC battery is placed on electric hot plate and is heated, (lithium battery quickly adds certainly until thermal runaway occurs for lithium battery
1 DEG C/S of heat heating).The thermal runaway safety of comparative example 1-2 and comparative example 1.
As shown in Figure 1, lithium battery anode oxygen additive amount is 2kg, the entire heating process temperature rising of lithium battery is more steady,
When thermal runaway occurs for lithium battery, voltage quickly falls to 0V by 4.1V, and battery main body is persistently increased to 550 DEG C and starts to cool down,
Do not occur on fire.
As shown in Fig. 2, lithium battery anode oxygen additive amount is 4kg, the entire heating process temperature rising of lithium battery is more steady,
When thermal runaway occurs for lithium battery, voltage quickly falls to 0V by 4.1V, and further battery main body is persistently increased to 400 DEG C and starts to drop
Temperature does not occur on fire.
As shown in figure 3, lithium battery anode oxygen additive amount is 0kg, as shown, when lithium battery temperature is increased close to 200
DEG C or so occur thermal runaway.Voltage quickly falls to 0V by 4.1V, and lithium battery temperature is increased to 800 DEG C or so by 200 DEG C rapidly
Occur on fire.
By experimental verification, oxygen absorption additive, the battery core temperature after can effectively reduce thermal runaway is added in lithium battery anode
Degree reduces the heat release for the redox reaction that oxygen participates in.Avoid lithium battery thermal runaway on fire.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of internal oxygen self-absorption safe lithium battery, it is characterised in that: the lithium battery includes positive plate, negative electrode tab；
The positive plate is by including that the raw material of following parts by weight is made:
The positive plate further includes oxygen absorption additive, and the additive amount of the oxygen absorption additive is positive-active material
The 0.01-10% of the total amount of material, positive conductive agent and positive electrode binder；
The oxygen absorption additive is one of alumino-silicate, zeolite, active carbon, carbon black or molecular sieve.
2. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the oxygen absorption adds
The aperture for adding agent is 0.2-10nm；The size of the oxygen absorption additive is 1-5mm.
3. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the positive-active material
Material is lithium-transition metal composite oxide；The lithium-transition metal composite oxide is LiMxOy or LiMxPO4In at least
It is a kind of, wherein M is the combination of one or more of transition metal, 0≤x≤3,0≤y≤4；The lithium transition-metal composite oxygen
Compound is LiMn2O4、LiNiO2、LiCoO2、LiNi0.5Co0.2Mn0.3O2、LiFePO4Or LiVPO4At least one of.
4. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the positive conductive agent
For one of carbon black, carbon nanotube, graphene or electrically conductive graphite or multiple combinations；The positive electrode binder is PVDF；Institute
The positive solvent stated is NMP.
5. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the negative electrode tab is by wrapping
The raw material for including following parts by weight is made:
6. internal oxygen self-absorption safe lithium battery according to claim 5, it is characterised in that: the negative electrode active material
Material is at least one of lithium alloy, carbon, petroleum coke, active carbon, graphite, carbon fiber, silicon or carbon nanotube；The cathode is led
Electric agent is at least one of carbon black, carbon nanotube, graphene or electrically conductive graphite；The negative electrode binder is CMC's and SBR
Combination；The cathode solvent is deionized water.
7. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the lithium battery also wraps
Membrane structure is included, it is to apply with ceramics or boehmite that the membrane structure, which is with one of polyolefin, polypropylene or PET for substrate,
The micro-pore septum of layer；The membrane structure with a thickness of 6-30um, porosity 25-65%, air permeability 100-1000sec/
100cc。
8. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the lithium battery also wraps
Electrolyte is included, the electrolyte is by including that the raw material of following parts by weight is made:
75-90 parts of electrolyte solvent,
8-20 parts of electrolyte lithium salts,
0.2-10 parts of film for additive.
9. internal oxygen self-absorption safe lithium battery according to claim 8, it is characterised in that: the electrolyte solvent
For ethylene carbonate, propene carbonate, butylene, ɑ-butyrolactone, ɑ-valerolactone, dimethyl carbonate, diethyl carbonate, carbon
At least one of sour methyl ethyl ester, diethoxyethane or 1,3- dioxolane；The electrolyte lithium salts is LiPF6、LiBF4、
LiClO4、LiBOB、LiN(CF3SO2)2、Li(CF3SO2)3At least one of；The film for additive is sour vinylene
Or at least one of propylene sulfite.
10. internal oxygen self-absorption safe lithium battery according to claim 1, it is characterised in that: the positive plate
Cathode metal collector is aluminium foil；The negative metal collector of the negative electrode tab is copper foil.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111342116A (en) * | 2020-03-17 | 2020-06-26 | 天津市捷威动力工业有限公司 | Safety lithium ion battery |
| CN111446450A (en) * | 2020-03-31 | 2020-07-24 | 珠海冠宇电池股份有限公司 | Functional material, positive plate containing functional material and lithium ion battery |
| CN113054190A (en) * | 2019-12-26 | 2021-06-29 | 北京宝沃汽车股份有限公司 | Method for reducing gas generation of battery |
| CN113451664A (en) * | 2020-03-24 | 2021-09-28 | 东营市海科新源化工有限责任公司 | Thermally-excited active safety mechanism flame-retardant microcapsule, preparation method thereof and lithium ion battery |
| CN114464908A (en) * | 2022-04-13 | 2022-05-10 | 四川新能源汽车创新中心有限公司 | Three-dimensional porous coating for lithium ion battery and preparation and application thereof |
| CN114583385A (en) * | 2022-03-02 | 2022-06-03 | 上海兰钧新能源科技有限公司 | Lithium battery composite safety diaphragm, lithium battery cell and corresponding preparation method |
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| CN113054190A (en) * | 2019-12-26 | 2021-06-29 | 北京宝沃汽车股份有限公司 | Method for reducing gas generation of battery |
| CN111342116A (en) * | 2020-03-17 | 2020-06-26 | 天津市捷威动力工业有限公司 | Safety lithium ion battery |
| CN113451664A (en) * | 2020-03-24 | 2021-09-28 | 东营市海科新源化工有限责任公司 | Thermally-excited active safety mechanism flame-retardant microcapsule, preparation method thereof and lithium ion battery |
| CN113451664B (en) * | 2020-03-24 | 2023-01-24 | 东营市海科新源化工有限责任公司 | Thermally-excited active safety mechanism flame-retardant microcapsule, preparation method thereof and lithium ion battery |
| CN111446450A (en) * | 2020-03-31 | 2020-07-24 | 珠海冠宇电池股份有限公司 | Functional material, positive plate containing functional material and lithium ion battery |
| CN114583385A (en) * | 2022-03-02 | 2022-06-03 | 上海兰钧新能源科技有限公司 | Lithium battery composite safety diaphragm, lithium battery cell and corresponding preparation method |
| CN114583385B (en) * | 2022-03-02 | 2024-03-15 | 上海兰钧新能源科技有限公司 | Lithium battery composite safety diaphragm, lithium battery cell and corresponding preparation method |
| CN114464908A (en) * | 2022-04-13 | 2022-05-10 | 四川新能源汽车创新中心有限公司 | Three-dimensional porous coating for lithium ion battery and preparation and application thereof |
| CN114464908B (en) * | 2022-04-13 | 2022-08-12 | 四川新能源汽车创新中心有限公司 | Three-dimensional porous coating for lithium ion battery and preparation and application thereof |
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