CN101090151A - Manufacturing method of lithium ion battery plus-negative plate - Google Patents
Manufacturing method of lithium ion battery plus-negative plate Download PDFInfo
- Publication number
- CN101090151A CN101090151A CNA2007101439162A CN200710143916A CN101090151A CN 101090151 A CN101090151 A CN 101090151A CN A2007101439162 A CNA2007101439162 A CN A2007101439162A CN 200710143916 A CN200710143916 A CN 200710143916A CN 101090151 A CN101090151 A CN 101090151A
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- Prior art keywords
- lithium ion
- ion battery
- positive
- slurry
- negative plate
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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
This invention relates to a manufacturing method for positive and negative poles of Li ionic cells, which coats soluble slurry onto the positive and negative poles and heats the moisture of the slurry with a microwave heater to dry the slurry to eliminate the moisture thoroughly and quickly.
Description
Technical field
The present invention relates to a kind of lithium ion battery, it refers to a kind of manufacture method of water-soluble paste coating oven dry of lithium ion battery plus-negative plate especially.
Background technology
Lithium battery is a kind of of secondary cell (being rechargeable type).Lithium battery mainly is to form with anodal lithium alloy oxide, liquid organic electrolyte and negative carbon material, in addition, with barrier film both positive and negative polarity is separated to avoid short circuit between both positive and negative polarity, the liquid organic electrolyte then is contained in mushy plastic barrier film, is responsible for the conduction work of ionic charge.
Advantages such as lithium battery has that energy density height, operating voltage height, serviceability temperature scope are big, memory-less effect, life-span are long, but unit price is higher.
Up-to-date digital camera polygamy is equipped with lithium battery, does not have memory effect, and it is very fast to open photoflash lamp and colour liquid crystal display device, more efficient than Ni-MH battery in the use.The development of lithium battery, initial stage is based on primary cell, step on the paper of taking (JohnB.Goodenough) professor to deliver lithium cobalt electrode material from 1980 Britain paddy, formally release the lithium rechargeable battery commodity in the 1991 new power energy science and technology company of Japan, the time of short more than ten years, promptly have the manufacturer more than ten families to put into production in Japan, the output value surpasses 200,000,000,000 yen.Its characteristics comprise energy density height, operating voltage height, power output is big, discharge is steady, working temperature is interval greatly, charge and discharge cycles can reach more than 500 times, self discharge is low, storage life is long, is regarded as present topmost secondary cell.Educational circles, industry are still very ardent to the research of lithium secondary battery.This type of battery is according to the difference of its separator system, divide into lithium ion battery and lithium macromolecule secondary cell again, both are negative pole with the carbon material all, cooperate lithium and cobalt oxides (LiCoO2), lithium manganese oxide (LiMn2O4) or lithium nickel oxide positive active materials such as (LiNiO2).
Lithium rechargeable battery is when charging (charger is sent into electric current at the positive pole of lithium battery), electronics enters via the charger outside in the active material structure of battery cathode (sense of current is just opposite with the electron stream direction) (as the carbon material), lithium ion in the positive electrode (being generally lithium metal oxide) then leaves positive pole simultaneously, enters negative pole via electrolyte by barrier film.When discharge, electronics and lithium ion are then oppositely gone.
The drying means of the coating water-soluble paste of existing lithium ion battery plus-negative plate is: the foil that covers slurry enters baking oven, and oven interior drum hot blast blows to pulp layer, bleeds and take away moisture evaporated and reach the oven dry purpose in the baking oven top.Yet this kind mode is that power consumption is big, dry thoroughly not inhomogeneous, more than baking oven takes up room and adjustment be difficult to reach design standard.
Summary of the invention
Main purpose of the present invention provides a kind of manufacture method of lithium ion battery plus-negative plate, and it is to utilize the gentle breeze heater, adopts the both positive and negative polarity of certain frequency heating coating water-soluble paste, with flash baking slurry effectively.
For realizing purpose of the present invention, the present invention is a kind of manufacture method of lithium ion battery plus-negative plate, and it is when water-soluble paste is coated with the layout positive and negative electrode, utilizes microwave applicator to dry, and behind the removal moisture, carries out bonding with active material again.
Compared to prior art, the present invention has following advantage: utilize microwave applicator with the effective conservation of power of the method that positive and negative electrode is coated with water-soluble paste oven dry, make full use of the space, make that being coated with the adjusted mode simplifies.
Description of drawings
Fig. 1: it is the flow chart of manufacture method of the lithium ion battery plus-negative plate of a preferred embodiment of the present invention.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
Be the method for drying behind the lithium ion battery plus-negative plate coating water-soluble paste that solves prior art, the present invention provides the use microwave applicator, and control oven dry positive and negative electrode fast and accurately can be saved the cost and the space of saving factory building of oven dry whereby.
At first, see also Fig. 1, it is the flow chart of manufacture method of the lithium ion battery plus-negative plate of a preferred embodiment of the present invention; As shown in the figure, the manufacture method of disclosed lithium ion battery plus-negative plate, it is the method that the positive and negative electrode of coating water-soluble paste is dried, its step includes:
Step S1, the slurry of water intaking dissolubility, viscosity adjustment is 4000～12000mpas
-1
Step S2 with slurry dressing according to a conventional method, unreel with adjusting range density and coat positive and negative electrode, puts into microwave applicator then;
Step S3, the water-soluble paste of both positive and negative polarity is coated in the microwave heating of the certain frequency 500-3000MHz of employing microwave applicator, and at this moment, slurry and electromagnetic field of high frequency do relative motion; And
Step S4 is provided with extractor fan in the baking oven top, is used to take away vaporized gas.
Wherein, the microwave applicator wall adopts metal framework and glass to constitute, and prevents microwave leakage and is beneficial to observation.And the material of positive and negative electrode is a foil, and for example aluminium foil or Copper Foil are behind the water-soluble paste on the oven dry positive and negative electrode, again with bonding active material.Water-soluble paste comprises water-soluble polymer, electroactive material, conductive black and as the water of solvent in the composition; Said water-soluble polymer is that a kind of organic silica gel crosslinking additives adds the modification polyethylene glycol oxide, and electroactive material is a kind of lithium-containing transition metal oxide; For the bonding slurry that both positive and negative polarity is used, comprise water-soluble polymer, graphite in the composition and as the water of solvent; Stipulate proportioning according to each component in manufacturing process, the employing substep mixes, step such as stirring and screening is made with extra care and formed when controlling.Because of adopting water-soluble paste to make the bonding slurry of electrode, can reduce battery polarization, reduce the energy loss of battery in discharging and recharging, raising battery capacity and specific energy and raising recycle number of times, help improving production environment and to the protection of environment.
Claims (2)
1, a kind of manufacture method of lithium ion battery plus-negative plate is characterized in that:
The slurry of water intaking dissolubility, viscosity adjustment is 4000～12000mpas
-1
With slurry dressing according to a conventional method, unreel with adjusting range density and coat positive and negative electrode, put into microwave applicator then;
Adopt the microwave applicator heating to coat the water-soluble paste of both positive and negative polarity, at this moment, slurry and electromagnetic field of high frequency do relative motion; And be provided with extractor fan in the baking oven top, be used to take away vaporized gas.
2, the manufacture method of lithium ion battery plus-negative plate according to claim 1 is characterised in that: the microwave frequency of utilization of microwave applicator is 500-3000MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101439162A CN101090151A (en) | 2007-08-14 | 2007-08-14 | Manufacturing method of lithium ion battery plus-negative plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101439162A CN101090151A (en) | 2007-08-14 | 2007-08-14 | Manufacturing method of lithium ion battery plus-negative plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101090151A true CN101090151A (en) | 2007-12-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101439162A Pending CN101090151A (en) | 2007-08-14 | 2007-08-14 | Manufacturing method of lithium ion battery plus-negative plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN101090151A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104521055A (en) * | 2012-03-16 | 2015-04-15 | A123系统公司 | Microwave drying of lithium-ion battery materials |
-
2007
- 2007-08-14 CN CNA2007101439162A patent/CN101090151A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104521055A (en) * | 2012-03-16 | 2015-04-15 | A123系统公司 | Microwave drying of lithium-ion battery materials |
| US10181599B2 (en) | 2012-03-16 | 2019-01-15 | A123 Systems, LLC | Microwave drying of lithium-ion battery materials |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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