CN206864542U - A kind of 3V level lithium ion batteries based on lithium titanate anode material - Google Patents
A kind of 3V level lithium ion batteries based on lithium titanate anode material Download PDFInfo
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- CN206864542U CN206864542U CN201720738128.7U CN201720738128U CN206864542U CN 206864542 U CN206864542 U CN 206864542U CN 201720738128 U CN201720738128 U CN 201720738128U CN 206864542 U CN206864542 U CN 206864542U
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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 utility model provides a kind of 3V level lithium ion batteries based on lithium titanate anode material, and battery appearance is square structure, and the sheathing material of battery is aluminium alloy or aluminum plastic film；Pole group is stacked or takeup type structure, and multipole group composes in parallel, filled with high voltage withstanding electrolyte in battery case；Pole group is stacked or takeup type structure；Include anode pole piece and cathode pole piece in each pole group, barrier film is provided between pole piece, the thickness of the barrier film is 12~60 μm；The anode pole piece and cathode pole piece are the carbon-coated aluminum foils for scribbling active material, and the thickness of the carbon-coated aluminum foils is 20~40 μm.The utility model designs battery with capacity of negative plates restricted version, using multilayer composite membrane, utter misery aluminium foil pole piece manufacture multipole group 3V level spinel nickel LiMn2O4 lithium titanate batteries in parallel, the height of the 3V level lithium ion batteries energy density based on lithium titanate anode thus manufactured, have extended cycle life.
Description
Technical field
The utility model belongs to the field that chemical energy is changed into the device of electric energy, and in particular to one kind is based on lithium titanate material
3V level lithium ion batteries.
Background technology
Spinel lithium titanate (Li4Ti5O12) it is a kind of novel cathode material for lithium ion battery, after Lithium-ion embeding lattice,
Crystal formation does not change, and unit cell volume change is less than 1%, and this causes battery to have extraordinary charge-discharge performance.It is sharp brilliant
Stone lithium titanate material is three-dimensional lithium ion conductor, and ion diffusional resistance is small, and charge/discharge rates are fast.The embedding lithium electrode current potential of the material compared with
Height (1.55V vs.Li/Li+), battery can avoid the growth of Li dendrite in charging process, show good overcharge peace
Omnicharacteristic.In addition, when internal short-circuit occurs in battery, lithium titanate anode can be quickly converted to insulator, cut off electric current, show
Excellent short-circuit protection characteristic.
Spinel-type nickel ion doped (Li1-xNi0.5Mn1.5O4) material has 4.75V (vs.Li/Li+) discharge platform, it is theoretical
Specific capacity is 146.7mAh/g, and theory is than energy up to 650Wh/kg.Nickel ion doped is also the electronic and ionic mixing of three-dimensional conductive
Conductor, its electric conductivity is better than lithium titanate, shows excellent multiplying power and cryogenic discharging characteristic.Mangaic acid is incorporated into due to nickle atom
Fundamentally changed in lithium in material in electron orbit overlapping cases and surface nature, the dissolution problem of manganese will not be produced, made
The specific capacity and high temperature cyclic performance for obtaining material are all largely increased.
The advantages of nickel ion doped-lithium titanate battery, is：Rated operational voltage with 3.2V, energy density are high, can be with
Fast charging and discharging under cryogenic, and cycle performance is good, and security is better than ferric phosphate lithium cell, and these features make its work
There is huge business potential for power lithium-ion battery application.
But because nickel ion doped electrode potential is high, in LiPF6In use, anion (PF in electrolyte6 -) easily by oxygen
Change, caused hydrofluoric acid meeting corroding electrode material and aluminum foil current collector, produce hydrogen and moisture.Moisture meeting and anion again
(PF6 -) reaction generation hydrofluoric acid, so move in circles, electrode material is constantly corroded, battery capacity rapid decrease.Grind
Study carefully and show：H in the gas generated and electrolyte of lithium titanate battery2O and HF content is directly proportional.Electrolyte is born in lithium titanate
Pole surface, which produces gas, to increase inner pressure of battery, cell expansion, and the advantage of lithium titanate battery long-life, which plays, not to be come out.
Utility model content
For weak point existing for this area, the purpose of this utility model is to propose a kind of 3V based on lithium titanate material
Level lithium ion battery.
To realize that the utility model purpose technical scheme is：
A kind of 3V level lithium ion batteries based on lithium titanate anode material, battery appearance are square structure, the shell of battery
Material is aluminium alloy or aluminum plastic film；Pole group is stacked or takeup type structure, and multipole group composes in parallel, filled with resistance in battery case
High-tension electrolyte；
Include anode pole piece and cathode pole piece in each pole group, barrier film is provided between pole piece, the thickness of the barrier film is 12
~60 μm；
The anode pole piece is the pole piece coated with spinel nickel LiMn2O4 active material, the negative pole in carbon-coated aluminum foils
For pole piece to be coated with the pole piece of spinel lithium titanate active material in carbon-coated aluminum foils, the thickness of the carbon-coated aluminum foils is 20~40
μm。
The high pressure resistant electrolyte of the utility model battery is existing electrolyte, such as with ethylene carbonate, propylene carbonate
One or more in ester, diethyl carbonate, methyl propyl carbonate are solvent, and solute lithium salts is lithium hexafluoro phosphate, the electrolyte
It is middle to add the additive for accounting for electrolyte gross mass 3%~15%.The electrolysis additive is difluorine oxalic acid boracic acid lithium
(LiODFB), the one or more in cyclic ether, fluorinated hydrocarbons.It is existing formula.
One of the utility model optimal technical scheme is that the barrier film is polypropylene screen, polyethylene film and polypropylene screen structure
Into sandwich diaphragm.
Another optimal technical scheme of the utility model is that the barrier film is Al2O3Ceramic-coated separator, Al2O3Ceramic coating
By nanoscale Al2O3Ceramic particle is formed, and is coated on the two sides of polyethylene diagrams, Al2O3The thickness of ceramic coating be 100~
800nm, the thickness of polyethylene diagrams is 12~60 μm.
More preferably：Battery is designed using capacity of negative plates limitation, and the active material area being coated with anode pole piece is negative pole
1.1~1.3 times of the active material area being coated with pole piece.
Wherein, battery is that 2~5 pole groups compose in parallel.
The manufacture method of lithium ion battery described in the utility model, including step：
(1) prepared by anode and cathode slurry；(2) prepared by both positive and negative polarity pole piece；(3) prepared by pole group；(4) battery assembles；(5) vacuum impregnating
Liquid；(6) open type high temperature is melted into；(7) vacuum seal；(8) performance detection.
Wherein, the positive/negative plate manufacturing process uses microwave heated baking.
The beneficial effects of the utility model are：
The present invention designs battery with capacity of negative plates restricted version, more using multilayer composite membrane, the manufacture of carbon-coated aluminum foils pole piece
Pole group 3V levels spinel nickel LiMn2O4-lithium titanate battery in parallel, designed by optimizing pole piece, using high pressure resistant electrolyte, if
Meter pole piece micro-wave drying technique and battery high-temperature chemical synthesis technology overcome battery flatulence and the easy resolution problem of electrolyte, battery
Voltage is 3.2V, and the 3V level lithium ion batteries energy density based on lithium titanate anode thus manufactured is high, has extended cycle life.
Brief description of the drawings
Fig. 1 is the utility model rectangular cell external view；
Fig. 2 is rectangular cell sectional view；
Fig. 3 is rectangular cell Section A-A view
Fig. 4 is the structural representation of a pole group；
Fig. 5 is the circulating battery curve of embodiment 1.
In figure, 1 is battery case, and 201 be spinel nickel LiMn2O4 coating layer of active substance, and 202 be positive pole carbon-coated aluminum foils piece,
203 be positive pole ear, and 204 be positive output terminals, and 301 be spinel lithium titanate coating layer of active substance, and 302 be that negative pole applies carbon aluminium
Paillon foil, 303 be negative lug, and 304 be negative output terminals, and 4 be barrier film, and 5 be pole group, and 6 be battery cover board.
Embodiment
Illustrate the utility model below by most preferred embodiment.Those skilled in the art institute it should be understood that, embodiment only
For illustrating the utility model rather than for limiting the scope of the utility model.
In embodiment, unless otherwise instructed, used means are technological means known in those skilled in the art.
Positive active material, negative electrode active material, the electrolyte of use, it is well known in the art conventional in embodiment
Material.
Embodiment 1：
Square nickel ion doped-lithium titanate battery is prepared, battery specifications are：Thickness 18mm, width 65mm, height 140mm, if
Count the ampere-hour of capacity 10.
Referring to Fig. 1, the present embodiment battery appearance is square, and the material of battery case 1 is aluminium alloy, is set in battery case
3 pole groups, to be connected in parallel between the group of pole；Pole group is rolled structure；Filled with high voltage withstanding electrolyte in battery case.
Referring to Fig. 2-4, include anode pole piece and cathode pole piece in each pole group, barrier film 4 is provided between pole piece；Anode pole piece
Including positive pole aluminium foil piece 202, the spinel nickel LiMn2O4 coating layer of active substance 201 being coated with aluminium foil；Weld aluminium foil end
It is connected to positive pole ear 203；The spinel lithium titanate work that cathode pole piece includes negative pole carbon-coated aluminum foils piece 302, is coated with aluminium foil
Property matter coatings 301；Negative pole aluminium foil end is welded with negative lug 303；
In the present embodiment, the thickness of aluminium foil is 20 μm；Barrier film 4 is Al2O3Ceramic-coated separator, Al2O3Ceramic coating is by receiving
Meter level Al2O3Ceramic particle is formed, and is coated on the two sides of polyethylene diagrams, Al2O3The thickness of ceramic coating is 600~800nm,
The thickness of polyethylene diagrams is 40 μm.
The battery of the present embodiment is designed using capacity of negative plates limitation, the active material (spinel-type being coated with anode pole piece
Nickel ion doped) area is 1.1 times of active material (spinel lithium titanate) area be coated with cathode pole piece.It is coated with active matter
Microwave heated baking is used after matter.
Battery assembles：
Three pole groups 5 are stacked together, positive and negative lug is in parallel.By the anode ear of three pole groups and the positive pole of battery cover board
Lead-out terminal 204 is ultrasonically welded together.By the ultrasound of negative output terminals 304 of the negative electrode lug of three pole groups and battery cover board 6
Weld together.Pole is assembled into shell, by lid and housing with being laser welded.
Vacuum liquid filling：Battery needs to carry out dewater treatment before fluid injection.Battery is placed on vacuum bakeout in vacuum oven,
Vacuum is higher than -0.095MPa, and 80 DEG C of baking temperature, until baking time is no less than 24 hours, moisture is less than 2ppm
Only.Electrolyte is injected after cooling, pole piece should be able to thoroughly be impregnated with by electrolyte injection rate to be advisable, and is sealed liquid injection port temporarily with PI glue band
It is stifled.Finally, battery standing is for a period of time until electrode material is by electrolyte complete wetting.
High temperature is melted into：Non- sealed battery is put into the high temperature chemical conversion case of argon gas protection, 30min is stood, is heated to temperature
For 80 DEG C, using 0.1C constant-current constant-voltage chargings to 3.6V, 30min is then stood, is vented；Using 0.1C constant-current discharges to 2.7V,
Stand 15min.0.2C constant-current charges stand 15min, reignition/charging is once to 3.6V.
Vacuum seal：Battery is put into vacuum sealer by chemical conversion after terminating, and is firmly compressed battery case, it is returned to original
The thickness come, is evacuated down to -0.09MPa, and an aluminium rivet is pressed into liquid injection port.
Performance detection：First with 1C constant-current constant-voltage chargings to 3.6V, electric current ends when reaching 0.01C, is then put with 1C constant currents
Electricity reaches 2.7V, measurement initial capacity C0With cell thickness d0.With 1C constant-current constant-voltage chargings to 3.6V, electric current is cut when reaching 0.01C
Only, make battery full charge, battery is placed on and stands 28 days at room temperature, makes battery capacity Natural Attenuation.Arrived again with 1C constant-current discharges
2.7V, measurement residual capacity C1With cell thickness d1.Finally, with 1C constant-current constant-voltage chargings to 3.6V, cut-off current 0.01C.Then
2.7V is reached with 1C constant-current discharges, measurement recovers capacity C2.Calculate cell expansion rate (d1/d0) it is 100.01%, capability retention
(C1/C0) it is 99.66%, capacity restoration rate (C2/C0) it is 100%.
With 1C constant-current constant-voltage chargings to 3.6V, cut-off current 0.01C.Then followed with 6C constant-current discharges to 2.7V, discharge and recharge
Capability retention is 100% after ring 1000 times, as a result sees Fig. 5.
Embodiment above is only that preferred embodiment of the present utility model is described, not to the utility model
Scope be defined, on the premise of the utility model design spirit is not departed from, this area ordinary skill technical staff to this
The all variations and modifications that the technical scheme of utility model is made, the guarantor that claims of the present utility model determine all should be fallen into
In the range of shield.
Claims (5)
- A kind of 1. 3V level lithium ion batteries based on lithium titanate anode material, it is characterised in that：Battery appearance is square structure, and the sheathing material of battery is aluminium alloy or aluminum plastic film；Pole group is stacked or takeup type knot Structure, multipole group compose in parallel, filled with high voltage withstanding electrolyte in battery case；Include anode pole piece and cathode pole piece in each pole group, barrier film is provided between pole piece, the thickness of the barrier film is 12~60 μ m；The anode pole piece is the pole piece coated with spinel nickel LiMn2O4 active material, the cathode pole piece in carbon-coated aluminum foils To be coated with the pole piece of spinel lithium titanate active material in carbon-coated aluminum foils, the thickness of the aluminium foil is 20~40 μm.
- 2. the 3V level lithium ion batteries based on lithium titanate anode material according to claim 1, it is characterised in that the barrier film The sandwich diaphragm formed for polypropylene screen, polyethylene film and polypropylene screen.
- 3. the 3V level lithium ion batteries based on lithium titanate anode material according to claim 1, it is characterised in that the barrier film For Al2O3Ceramic-coated separator, Al2O3Ceramic coating is by nanoscale Al2O3Ceramic particle is formed, and is coated on the two of polyethylene diagrams Face, Al2O3The thickness of ceramic coating is 100~800nm, and the thickness of polyethylene diagrams is 12~60 μm.
- 4. the 3V level lithium ion batteries based on lithium titanate anode material, its feature exist according to any one of claims 1 to 3 In：The battery is designed using capacity of negative plates limitation, and the active material area being coated with anode pole piece is to be coated with cathode pole piece 1.1~1.3 times of active material area.
- 5. the 3V level lithium ion batteries based on lithium titanate anode material, its feature exist according to any one of claims 1 to 3 In：The battery is that 2~5 pole groups compose in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720738128.7U CN206864542U (en) | 2017-06-22 | 2017-06-22 | A kind of 3V level lithium ion batteries based on lithium titanate anode material |
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| CN201720738128.7U CN206864542U (en) | 2017-06-22 | 2017-06-22 | A kind of 3V level lithium ion batteries based on lithium titanate anode material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112038650A (en) * | 2020-07-28 | 2020-12-04 | 天津力神电池股份有限公司 | Flexible package lithium fluorocarbon primary battery |
| CN112382794A (en) * | 2020-08-03 | 2021-02-19 | 万向一二三股份公司 | Preparation method of graphite cathode lithium ion battery |
| CN113745458A (en) * | 2020-05-27 | 2021-12-03 | 财团法人工业技术研究院 | Polar plate and battery |
-
2017
- 2017-06-22 CN CN201720738128.7U patent/CN206864542U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113745458A (en) * | 2020-05-27 | 2021-12-03 | 财团法人工业技术研究院 | Polar plate and battery |
| CN112038650A (en) * | 2020-07-28 | 2020-12-04 | 天津力神电池股份有限公司 | Flexible package lithium fluorocarbon primary battery |
| CN112382794A (en) * | 2020-08-03 | 2021-02-19 | 万向一二三股份公司 | Preparation method of graphite cathode lithium ion battery |
| CN112382794B (en) * | 2020-08-03 | 2021-10-15 | 万向一二三股份公司 | Preparation method of graphite cathode lithium ion battery |
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| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: GEJIU SHENGBIHE INDUSTRIAL Co.,Ltd. Assignor: BEIJING SUPERHOO TECHNOLOGY CO.,LTD. Contract record no.: X2022440020006 Denomination of utility model: A 3V lithium ion battery based on lithium titanate cathode material Granted publication date: 20180109 License type: Exclusive License Record date: 20220629 |