CN108598421A - A kind of start and stop battery - Google Patents
A kind of start and stop battery Download PDFInfo
- Publication number
- CN108598421A CN108598421A CN201810377219.1A CN201810377219A CN108598421A CN 108598421 A CN108598421 A CN 108598421A CN 201810377219 A CN201810377219 A CN 201810377219A CN 108598421 A CN108598421 A CN 108598421A
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- CN
- China
- Prior art keywords
- lithium
- battery
- stop
- lithium ion
- metatitanic acid
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- 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.)
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/366—Composites as layered products
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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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
- H01M4/583—Carbonaceous material, e.g. graphite-intercalation compounds or CFx
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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
Abstract
The invention discloses a kind of start and stop batteries, including battery pole plates and partition board, the battery pole plates include anode and cathode, it is characterized in that, the surface that the negative material is coated on base-material graphite by metatitanic acid crystalline lithium is formed, the lithium titanate is adulterated using magnesium or aluminium, diffusion coefficient of the lithium ion in metatitanic acid crystalline lithium is more order of magnitude greater than the diffusion coefficient in graphite, the ion for increasing lithium titanate and electrolyte solid-liquid surface is spread, accelerate discharge and recharge reaction speed, improves the power-performance and low temperature charge-discharge performance of battery.Solve diffusion bottleneck of the start and stop lithium ion battery at low temperature in cathode, the reaction speed for substantially increasing lithium ion in charge and discharge process, in entire battery, the transmission speed of lithium ion is faster, current density is bigger, therefore can significantly improve the power-performance and cryogenic property of start and stop battery.
Description
Technical field
The invention belongs to new energy car battery fields, specifically, being related to a kind of start and stop battery.
Background technology
Lithium ion battery has extended cycle life, has largely been obtained in electronic product extensively because having many advantages, such as capacity height
Using, such as smart mobile phone, tablet computer, digital camera, electronic toy, electronic navigator etc..In recent years, lithium ion battery exists
The fields such as new-energy automobile, communication base station, military affairs, aerospace also have obtained relatively broad application.
In June, 2013, European Union has approved the year two thousand twenty CO2 emission standard, which requires flat to the year two thousand twenty new car
Equal carbon dioxide emission level control is in 95 grams/kilometer.This target has upgraded to mandatory standard, if cannot meet CO2
The requirement of discharge capacity limitation will face the fine of every 95 Euros of the super every gram of highest of per car.Based on the further of vehicle-mounted power demand
The more acute actual conditions of the situation of raising and energy-saving and emission-reduction.From 2011, German several whole-car firms included Austria
Enlightening, BMW, Daimler, Porsche and masses put out jointly 48V system concepts, and have formulated LV148 standards.Start and stop lithium-ion electric
Pond before new-energy automobile is universal, market or will outburst, therefore each cart enterprise and Battery Plant all are stepping up to research and develop and be laid out 48V
Start and stop battery becomes the hot spot of new-energy automobile industry.Johnson controls at present, Bosch, Hitachi, SAFT, A123 etc. are proposed
For the reserve battery that 48V is gently mixed, the companies such as the country universal (LFP), BYD (LFP), CATL (NCM) and sail (LTO)
There is Related product.
According to the requirement of USABC48V systems, start and stop battery system quality ＜ 8kg, volume ＜ 8L, peak power ＞
11kW, -30 DEG C of power ＞ 1.1kW, cold start-up operating voltage ＞ 26V.This all proposes the power-performance of battery, cryogenic property
Quite high requirement, while high-temperature behavior, cycle and security performance are also taken into account, it is the difficulty in current battery R＆D process
Point.Lithium ion diffusion rate in solid-state is far below diffusion rate in liquid phase electrolyte, and rate controlling process, battery are diffused as in solid-state
Low temperature and power-performance depend primarily on the lithium ion in electrolyte in the reactivity of negative terminal surface, start and stop battery is as one
Kind micro- mixed power supply, big multiplying power discharging property requires high under low temperature, and common graphite is difficult to realize it, and high standard makes at low temperature
With requiring.
In view of this special to propose the present invention.
Invention content
The technical problem to be solved in the present invention be to overcome the deficiencies of the prior art and provide a kind of high-rate discharge ability,
The start and stop battery of cold starting performance and cycle performance.
In order to solve the above technical problems, the present invention is using the basic conception of technical solution：
A kind of start and stop battery, including battery pole plates and partition board, the battery pole plates include anode and cathode, feature
It is, the surface that the negative material is coated on base-material graphite by metatitanic acid crystalline lithium is formed, and the lithium titanate is mixed using magnesium or aluminium
It is miscellaneous.
Further, the metatitanic acid crystalline lithium preparation process is：Configuration titanium salt, addition oxalate complex obtain lithium titanate
Lithium salts, magnesium salts, aluminium salt is added in presoma, is milled to the unformed lithium titanate that granularity is 0.1-1 μm after stirring freezing and crystallizing, so
It is sintered at 900-1000 DEG C afterwards, obtains metatitanic acid crystalline lithium, the molar ratio of the titanium and lithium, magnesium, aluminium is 4-5:3.3-3.7:
0.5-1:0.5-1。
Further, the base-material graphite is artificial graphite, particle size 5-8um.
Further, the particle size of the metatitanic acid crystalline lithium is 1-5um, and the thickness of clad is 5-20nm.
After adopting the above technical scheme, the present invention has the advantages that compared with prior art.
Diffusion coefficient of the lithium ion in metatitanic acid crystalline lithium is 2*10-8Cm2/S, diffusion system of the lithium ion in artificial graphite
Number is 10-9cm2/S.The lithium titanate on particle surface layer is crystal structure, forms solid liquid interface with electrolyte, lithium ion is in the electrolytic solution
Can be rapidly embedded from lithium titanate material or deviate from, then spread in solid solid interface, lithium titanate is magnesium-doped or aluminium, enhances lithium
The diffusion velocity of ion.Since start and stop type lithium ion battery to there is big multiplying power discharging requirement at low temperature, lithium ion is in lithium titanate
Diffusion coefficient in crystal is more order of magnitude greater than the diffusion coefficient in graphite, increase lithium titanate and electrolyte solid-liquid surface from
Son diffusion, accelerates discharge and recharge reaction speed, improves the power-performance and low temperature charge-discharge performance of battery.Solves start and stop lithium ion
The battery diffusion bottleneck in cathode at low temperature, substantially increases the reaction speed of lithium ion in charge and discharge process, in entire electricity
The transmission speed of Chi Zhong, lithium ion are faster, and current density is bigger, thus can significantly improve start and stop battery power-performance and
Cryogenic property.
The specific implementation mode of the present invention is described in further detail below in conjunction with the accompanying drawings.
Description of the drawings
A part of the attached drawing as the application, for providing further understanding of the invention, of the invention is schematic
Embodiment and its explanation do not constitute inappropriate limitation of the present invention for explaining the present invention.Obviously, the accompanying drawings in the following description
Only some embodiments to those skilled in the art without creative efforts, can be with
Other accompanying drawings can also be obtained according to these attached drawings.In the accompanying drawings：
Fig. 1 is negative material structural schematic diagram of the present invention；
Fig. 2 is that lithium ion spreads schematic diagram in negative material when start and stop battery of the present invention charges.
In figure：1- artificial graphites；2- lithium titanate clads；3- graphite laminate structures；Lithium in 4- graphite laminate structures from
Son；Lithium ion in 5- electrolyte.
It should be noted that these attached drawings and verbal description are not intended to the design model limiting the invention in any way
It encloses, but is that those skilled in the art illustrate idea of the invention by referring to specific embodiments.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, the technical solution in embodiment is clearly and completely described, following embodiment for illustrating the present invention, but
It is not limited to the scope of the present invention.
Embodiment one
As shown in Figure 1 and Figure 2, a kind of start and stop battery described in the present embodiment, the negative material of the battery include base-material graphite,
Lithium titanate clad 2, wherein base-material graphite are the artificial graphite 1 of layer structure, particle size 5-8um, lithium titanate clad 2
The surface that base-material graphite is evenly coated at by lithium titanate is formed, and the lithium titanate is adulterated using magnesium or aluminium, and lithium titanate clad 2 is
The particle size of metatitanic acid crystalline lithium, metatitanic acid crystalline lithium is 1-5um, and the thickness of clad 2 is 5-20nm.
The preparation process of metatitanic acid crystalline lithium is：Titanium salt is configured to the solution of titaniferous 0.1-3mol/L, by oxalate and titanium
Molar ratio 1.5: 1~4: 1 complex containing oxalate is added into solution, reacted under 30~90 DEG C and stirring condition, so
It afterwards in 0.1~5 DEG C of freezing and crystallizing, stands, by the crystal filtering of precipitation, is washed with deionized, is then dried at 30~80 DEG C
Obtain lithium titanate precursor titanium oxyoxalate acid；Be added lithium salts, magnesium salts, aluminium salt, mix with above-mentioned lithium titanate precursor, the titanium and
Lithium, magnesium, aluminium molar ratio be 4-5:3.3-3.7:0.5-1:0.5-1, ball milling obtain the amorphous lithium titanate that granularity is 0.1~1 μm,
Then amorphous lithium titanate is sintered at 900-1000 DEG C, calcining is to get doped titanic acid crystalline lithium in air atmosphere.
Artificial graphite 1 is the solid solid interface being in close contact with lithium titanate cladding bed boundary, when battery charges, in electrolyte
Lithium ion 5 is entered quickly through lithium titanate clad 2 in graphite laminate structure 3, then the lithium ion 4 in graphite laminate structure
It is internally diffused into electrolyte by concentration difference again, completes the charging process of battery.Expansion of the lithium ion in metatitanic acid crystalline lithium
It is 2*10 to dissipate coefficient-8cm2/ S, diffusion coefficient of the lithium ion in artificial graphite are 10-9cm2/S.The lithium titanate on particle surface layer is
Crystal structure forms solid liquid interface with electrolyte, lithium ion in the electrolytic solution can it is rapidly embedded from lithium titanate material or
Abjection, then spreads in solid solid interface, and lithium titanate is magnesium-doped or aluminium, enhances the diffusion velocity of lithium ion.Due to start and stop type lithium from
Sub- battery to there is big multiplying power discharging requirement at low temperature, and diffusion coefficient of the lithium ion in metatitanic acid crystalline lithium is than the diffusion in graphite
Coefficient is order of magnitude greater, and the ion for increasing lithium titanate and electrolyte solid-liquid surface is spread, and accelerates discharge and recharge reaction speed, is improved
The power-performance and low temperature charge-discharge performance of battery.Solve diffusion bottleneck of the start and stop lithium ion battery at low temperature in cathode,
The reaction speed for substantially increasing lithium ion in charge and discharge process, in entire battery, the transmission of lithium ion is faster, current density
It is bigger, therefore the power-performance and cryogenic property of start and stop battery can be significantly improved.
The above is only presently preferred embodiments of the present invention, is not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this patent
Member without departing from the scope of the present invention, when the technology contents using above-mentioned prompt make it is a little change or be modified to
The equivalent embodiment of equivalent variations, it is right according to the technical essence of the invention as long as being the content without departing from technical solution of the present invention
Any simple modification, equivalent change and modification made by above example, in the range of still falling within the present invention program.
Claims (4)
1. a kind of start and stop battery, including battery pole plates and partition board, the battery pole plates include anode and cathode, feature exists
In the surface that the negative material is coated on base-material graphite by metatitanic acid crystalline lithium is formed, and the lithium titanate is adulterated using magnesium or aluminium.
2. start and stop battery according to claim 1, which is characterized in that the metatitanic acid crystalline lithium preparation process is：Configure titanium
Salt, addition oxalate complex obtain lithium titanate precursor, and lithium salts, magnesium salts, aluminium salt is added, grain is milled to after stirring freezing and crystallizing
Degree is 0.1-1 μm of unformed lithium titanate, is then sintered at 900-1000 DEG C, obtains metatitanic acid crystalline lithium, the titanium and lithium,
Magnesium, aluminium molar ratio be 4-5:3.3-3.7:0.5-1:0.5-1.
3. start and stop battery according to claim 1, which is characterized in that the base-material graphite is artificial graphite, particle size
For 5-8um.
4. start and stop battery according to claim 1, which is characterized in that the particle size of the metatitanic acid crystalline lithium is 1-5um,
The thickness of clad is 5-20nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377219.1A CN108598421A (en) | 2018-04-25 | 2018-04-25 | A kind of start and stop battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377219.1A CN108598421A (en) | 2018-04-25 | 2018-04-25 | A kind of start and stop battery |
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| CN108598421A true CN108598421A (en) | 2018-09-28 |
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| CN201810377219.1A Pending CN108598421A (en) | 2018-04-25 | 2018-04-25 | A kind of start and stop battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467096A (en) * | 2020-10-30 | 2021-03-09 | 安普瑞斯（南京）有限公司 | Negative electrode material, preparation method thereof, electrode and secondary battery |
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| CN103151505A (en) * | 2013-03-01 | 2013-06-12 | 中国科学院过程工程研究所 | Lithium-titanate composite negative pole material and preparation method thereof |
| CN104091937A (en) * | 2014-07-18 | 2014-10-08 | 深圳市振华新材料股份有限公司 | Lithium titanate-coated surface-treated graphite negative electrode material, preparation method and application of negative electrode material |
| CN105406052A (en) * | 2015-12-21 | 2016-03-16 | 宁波高新区锦众信息科技有限公司 | Preparation method of magnesium doped lithium titanate composite material for lithium ion battery |
| CN106477623A (en) * | 2016-09-12 | 2017-03-08 | 苏州大学 | A kind of method for preparing bobbles shape lithium titanate |
| CN107565101A (en) * | 2017-06-01 | 2018-01-09 | 四川大学 | A kind of composite modifying method for the metal-doped and carbon coating for preparing high-performance lithium titanate |
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2018
- 2018-04-25 CN CN201810377219.1A patent/CN108598421A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101689629A (en) * | 2007-06-22 | 2010-03-31 | 株式会社Lg化学 | Anode material of excellent conductivity and high power secondary battery employed with the same |
| CN101704681A (en) * | 2009-11-30 | 2010-05-12 | 中南大学 | Method for preparing lithium titanate with spinel structure |
| CN103151505A (en) * | 2013-03-01 | 2013-06-12 | 中国科学院过程工程研究所 | Lithium-titanate composite negative pole material and preparation method thereof |
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| CN107565101A (en) * | 2017-06-01 | 2018-01-09 | 四川大学 | A kind of composite modifying method for the metal-doped and carbon coating for preparing high-performance lithium titanate |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112467096A (en) * | 2020-10-30 | 2021-03-09 | 安普瑞斯（南京）有限公司 | Negative electrode material, preparation method thereof, electrode and secondary battery |
| CN112467096B (en) * | 2020-10-30 | 2022-09-23 | 安普瑞斯（南京）有限公司 | Negative electrode material, preparation method thereof, electrode and secondary battery |
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Effective date of registration: 20200522 Address after: Room g0232, headquarters building, Changsha Zhongdian Software Park, No. 39, Jianshan Road, high tech Development Zone, Changsha City, Hunan Province Applicant after: Thornton New Energy Technology (Changsha) Co.,Ltd. Address before: 411100 Hunan province Xiangtan City Jiuhua Demonstration Zone No. 78 West Benz Applicant before: SOUNDON NEW ENERGY TECHNOLOGY Co.,Ltd. |
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