CN101841063A - Ultra-high multiplying power lithium ion battery - Google Patents
Ultra-high multiplying power lithium ion battery Download PDFInfo
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- CN101841063A CN101841063A CN201010181949A CN201010181949A CN101841063A CN 101841063 A CN101841063 A CN 101841063A CN 201010181949 A CN201010181949 A CN 201010181949A CN 201010181949 A CN201010181949 A CN 201010181949A CN 101841063 A CN101841063 A CN 101841063A
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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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Abstract
The invention discloses an ultra-high multiplying power lithium ion battery which comprises anode material, cathode material, electrolyte and auxiliary material, wherein the ternary anode material is adopted, modified graphite is adopted as the cathode material, a PP/PE/PP three-layer film which has the porosity of 35-48 and is specially used for the lithium ion battery is taken as the auxiliary material, and the electrolyte takes ethylene carbonate as solvent and lithium hexaflourophosphate as a main system; anode slurry is prepared by mixing and stirring anode powder and solvent N-methylpyrrolidone (NMP for short), and has the concrete formulation: lithium manganese nickel and cobalt accounting for 43-57% of the total weight, wherein cobalt has the content of 25-35%, conductive graphite accounting for 1-5% of the total weight, polyvinylidene fluoride (PVDF) accounting for 1-2% of the total weight, wherein the molecular weight of the PVDF is 0.6-1 million, and the balance of solvent N-methylpyrrolidone. The ultra-high multiplying power lithium ion battery has the advantages that the low-power ultra-high multiplying power lithium ion battery can meet the starting need of an electric power tool, and guarantees the service life of the battery.
Description
Technical field
The invention belongs to the technical field that lithium ion battery is produced, relate in particular to a kind of electric tool and use mini power type lithium ion battery field.
Background technology
So-called multiplying power is meant that the numerical value of battery discharge current is the multiple of rating number, is expressed as 0.1C as discharging current, and for the battery of a 12Ah, promptly with the current discharge of 0.1 * 12=12A, 3C is meant the current discharge of 36A.The high-multiplying power discharge electric current is generally at 8C-10C, and the ultra-high magnifications discharging current is generally more than 10C.
The electric tool that uses in the market generally is merely able to discharge under the 5C-10C electric current with the small-scale lithium ion cell of power-type capacity as 1.5Ah, and useful life is not long.But along with the continuous development of electric tool technology, some electric tools such as electric circular saw etc. need higher starting current, and single the required discharging current of lithium ion battery is also proposed harsh requirement, also must satisfy certain useful life.Just commercial small cylindrical lithium ion battery at present can't meet the demands at all.
Summary of the invention
The object of the present invention is to provide a kind of ultra-high magnifications that can carry out to discharge, and can under this discharging current, have a kind of ultra-high magnification lithium ion battery than the long life.
For realizing purpose of the present invention, a kind of ultra-high magnification lithium ion battery, comprise positive electrode, negative material, electrolyte and auxilliary material, positive electrode adopts ternary, negative material adopts modified graphite, it is the special-purpose PP/PE/PP trilamellar membrane of 35-48% lithium ion battery that auxilliary material adopts porosity, electrolyte adopts ethylene carbonate to make solvent, lithium hexafluoro phosphate is the main system of electrolyte, the anode sizing agent preparation adopts positive mix to mix with the mode that solvent N-methyl pyrrolidone (being called for short NMP) stirs, the concrete prescription of anode sizing agent is: nickle cobalt lithium manganate accounts for the 43-57% of total weight, cobalt content wherein is 25-35%, the 1-5% Kynoar (PVDF) that electrically conductive graphite accounts for total weight accounts for the 1-2% of total weight, the molecular weight of Kynoar is 600,000-1,000,000, and all the other are solvent N-methyl pyrrolidone.
Advantage of the present invention is: this small-power ultra-high magnifications type lithium ion battery can satisfy the startup needs of electric tool, and the useful life that can guarantee battery.
Description of drawings
Fig. 1 high-multiplying power discharge battery charging and discharging curve figure;
Fig. 2 is ultra-high magnifications discharge battery charging and discharging curve figure.
Below in conjunction with accompanying drawing a kind of ultra-high magnification lithium ion battery of the present invention is described in further detail
Embodiment
The energy density and the performance that improve battery on the basis that guarantees battery security are cores of the present invention.The selected material system of power-type lithium ion battery all has certain general character, and the present invention is described narration to positive and negative pole material, electrolyte and the auxilliary material of battery.
Compact battery requires high first-selected cobalt acid lithium and these two kinds of positive electrodes of ternary because of energy density, but cobalt acid lithia voltinism strong, easily decompose, take place easily burning and blast; And the ternary operating voltage is higher, its average working voltage is that 3.7V, charging/discharging voltage are steady, be fit to high current charge-discharge, specific energy height, good cycle, the conductivity height, production technology is simple, preparation easily, security performance are good than the sour lithium material of cobalt, pretends the main material into positive pole of the present invention.
Native graphite and Delanium by modification processing, structure optimization and process modification after, has littler specific area, longer charge and discharge circulation life, be used for lithium ion battery, irreversible capacity compatibility little and electrolyte is good, advantage with capacity height, good heavy current meets the requirement of anticathode material of the present invention.
In order to improve heavy-current discharge performance, also on auxilliary material, done suitable adjustment:
Select for use area big, thickness is suitable, and the special-purpose PP/PE/PP trilamellar membrane of the commercialization lithium ion battery of high porosity (35-48%) had both helped improving battery capacity, was more suitable for big current cycle.
The electrolyte of commercialization lithium ion battery is made solvent with ethylene carbonate, and lithium hexafluoro phosphate is that electrolytical system is main, and the present invention suitably increases the ratio of lithium hexafluoro phosphate still as electrolyte system, improves the conductivity of electrolyte.
The preparation of lithium ion battery anode glue size adopts positive mix to mix with the mode that solvent N-methyl pyrrolidone (being called for short NMP) stirs, the present invention is to the redistribution of power-type anode material for lithium-ion batteries slurry, improve the conducting power of ion between the cell positive material, reach the ability of ultra-high magnifications discharge, be technological core of the present invention.
The present invention compares the original powerful 1.5Ah mini power type column lithium ion battery of our company (can represent performance level in the market) and this kind of ultra-high magnifications cell positive material prescription:
Existing high-multiplying-power battery anode sizing agent prescription is:
Nickle cobalt lithium manganate accounts for the 35-40% of total weight, cobalt content wherein is 15-25%, the 7-10% Kynoar (PVDF) that electrically conductive graphite accounts for total weight accounts for the 4-6% of total weight, and the molecular weight of Kynoar (PVDF) is 400,000～600,000, and all the other are solvent N-methyl pyrrolidone.
Ultra-high magnifications battery anode slurry prescription:
Nickle cobalt lithium manganate accounts for the 43-57% of total weight, cobalt content wherein is 25-35%, the 1-5% Kynoar (PVDF) that electrically conductive graphite accounts for total weight accounts for the 1-2% of total weight, and the molecular weight of Kynoar (PVDF) is between 600,000～1,000,000, and all the other are solvent N-methyl pyrrolidone.
The present invention compares the performance of two battery.
As shown in Figure 1 and Figure 2, high-multiplying power discharge battery and ultra-high magnifications discharge battery are with 300mA charging 750mA discharge, and discharge capacity all can reach 1500mAh.
Claims (1)
1. ultra-high magnification lithium ion battery, comprise positive electrode, negative material, electrolyte and auxilliary material, positive electrode adopts ternary, negative material adopts modified graphite, it is the special-purpose PP/PE/PP trilamellar membrane of 35-48% lithium ion battery that auxilliary material adopts porosity, electrolyte adopts ethylene carbonate to make solvent, lithium hexafluoro phosphate is the main system of electrolyte, the anode sizing agent preparation adopts positive mix to mix with the mode that solvent N-methyl pyrrolidone (being called for short NMP) stirs, the concrete prescription of anode sizing agent is: nickle cobalt lithium manganate accounts for the 43-57% of total weight, cobalt content wherein is 25-35%, the 1-5% Kynoar (PVDF) that electrically conductive graphite accounts for total weight accounts for the 1-2% of total weight, the molecular weight of Kynoar is 600,000-1,000,000, and all the other are solvent N-methyl pyrrolidone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010181949A CN101841063A (en) | 2010-05-25 | 2010-05-25 | Ultra-high multiplying power lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010181949A CN101841063A (en) | 2010-05-25 | 2010-05-25 | Ultra-high multiplying power lithium ion battery |
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| CN101841063A true CN101841063A (en) | 2010-09-22 |
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| CN201010181949A Pending CN101841063A (en) | 2010-05-25 | 2010-05-25 | Ultra-high multiplying power lithium ion battery |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1723576A (en) * | 2001-11-22 | 2006-01-18 | 株式会社汤浅 | Positive electrode active material for lithium secondary cell and lithium secondary cell |
| CN1953268A (en) * | 2004-10-21 | 2007-04-25 | 三洋电机株式会社 | Non-aqueous electrolyte battery |
| CN1983705A (en) * | 2005-12-15 | 2007-06-20 | 中国电子科技集团公司第十八研究所 | Safety lithium-ion battery |
| CN101685883A (en) * | 2008-09-23 | 2010-03-31 | 深圳市比克电池有限公司 | Polymer lithium ion battery and preparation method thereof |
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2010
- 2010-05-25 CN CN201010181949A patent/CN101841063A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1723576A (en) * | 2001-11-22 | 2006-01-18 | 株式会社汤浅 | Positive electrode active material for lithium secondary cell and lithium secondary cell |
| CN1953268A (en) * | 2004-10-21 | 2007-04-25 | 三洋电机株式会社 | Non-aqueous electrolyte battery |
| CN1983705A (en) * | 2005-12-15 | 2007-06-20 | 中国电子科技集团公司第十八研究所 | Safety lithium-ion battery |
| CN101685883A (en) * | 2008-09-23 | 2010-03-31 | 深圳市比克电池有限公司 | Polymer lithium ion battery and preparation method thereof |
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Application publication date: 20100922 |