CN103531746B - A kind of clear powder method of electrodes of lithium-ion batteries - Google Patents
A kind of clear powder method of electrodes of lithium-ion batteries Download PDFInfo
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- CN103531746B CN103531746B CN201310439891.6A CN201310439891A CN103531746B CN 103531746 B CN103531746 B CN 103531746B CN 201310439891 A CN201310439891 A CN 201310439891A CN 103531746 B CN103531746 B CN 103531746B
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- Prior art keywords
- pole piece
- clear powder
- lithium
- electrodes
- efflorescence
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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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 present invention relates to technical field of battery production, particularly relate to a kind of clear powder method of electrodes of lithium-ion batteries.This clear powder method comprises the following steps: heat pole piece needing the position of powder clearly with electric heating element, to make binding agent sex change in metal forming spreading mass and embrittlement, carry out brush with the position of hairbrush to the clear powder of described needs to sweep, then the slurry of efflorescence is collected, this clear powder method is easy and simple to handle, avoid and use blade to scrape the damage that the clear powder of pole piece brings to pole piece, improve the utilance of pole piece, clear powder is more thoroughly clean simultaneously, more be conducive to welding of pole piece and lug, avoid the problem of faulty soldering in welding process, effectively raise the reliability of lithium ion battery, in addition, this clear powder method clears up the slurry collecting efflorescence in time by hairbrush, finger also can not be too much contact pole piece, avoid and secondary pollution is caused to electrodes of lithium-ion batteries, improve the chemical property of lithium ion battery.
Description
Technical field
The present invention relates to technical field of battery production, particularly relate to a kind of clear powder method of electrodes of lithium-ion batteries.
Background technology
Lithium ion battery is a kind of high performance battery of novel environment friendly, and it is applied in the battery aspect of low capacity at first.Relative to lead-acid battery and Ni-MH battery, it has the advantage that volume is little, capacity is high, pollution-free, fail safe is good, along with the appearance of novel lithium ion anode material, the range of application of lithium ion battery is constantly expanded, from single battery of mobile phone application extension to every field such as large, medium and small electric automobile, power energy storage, back-up source, electric tools.
In lithium ion battery production process, pole piece is through that coating makes containing the positive and negative pole material of binding agent.When making a fault because of coating process, blank Copper Foil (or aluminium foil) can be coated with the slurry containing binding agent and electrode material, and this is recurrent in process of production.Now need to carry out powder clearly according to the requirement of technique, the coating by pole piece is wiped off, exposes metal forming, then carries out the processing such as spot welding.If, will the problems such as rosin joint be there is, affect battery performance in remaining coating fines.
The clear powder method of existing battery pole piece utilizes blade to clear up, namely the object of clear powder is realized by the relative motion of pole piece and blade, but the method has following problem: because on pole piece, the adhesion strength of material is larger, scrape with cutter and waste time and energy, operate complexity, and often have that to scrape the dynamics of pole piece inadequate, uneven and damage pole piece, cause pole piece to use and discard, so also reduce accordingly the while of the utilance of pole piece.Meanwhile, due to use cutter scrape the fines powder removed cannot collect in time and cutter scrape clearly in powder process finger often can contact pole piece, this all can cause secondary pollution to electrodes of lithium-ion batteries, thus occurs short circuit or self-discharge phenomenon after assembling.At present, improving the clear powder method of electrodes of lithium-ion batteries has been an important problem demanding prompt solution.
Therefore, for above deficiency, the invention provides a kind of clear powder method of electrodes of lithium-ion batteries.
Summary of the invention
(1) technical problem that will solve
A kind of clear powder method that the object of this invention is to provide electrodes of lithium-ion batteries is with the operation inconvenience solving existing clear powder method and exist, easy damaged pole piece and cannot collect the secondary pollution problem caused in time because of the powder removed.
(2) technical scheme
In order to solve the problems of the technologies described above, the invention provides a kind of clear powder method of electrodes of lithium-ion batteries, it comprises the following steps:
S1: heat pole piece needing the position of powder clearly with electric heating element, to make binding agent sex change in metal forming spreading mass and embrittlement;
S2: carry out brush with the position of hairbrush to the clear powder of described needs and sweep, then collect the slurry of efflorescence.
Wherein, in described step S1, needing the position of clear powder by heating temperatures to 120 ~ 200 DEG C.
Wherein, in described step S2, by the slurry of efflorescence being swept in collection container the slurry collecting efflorescence or the slurry being collected efflorescence by dust catcher with hairbrush.
Wherein, also step S3 is comprised: soldering polar ear in the metal forming that pole piece supernatant dried bean noodles is clean.
(3) beneficial effect
Technique scheme tool of the present invention has the following advantages: the clear powder method of a kind of electrodes of lithium-ion batteries provided by the invention adopts electric heating element to heat pole piece needing the position of powder clearly, to make binding agent sex change in metal forming spreading mass and embrittlement, then scrub with the position of hairbrush to the clear powder of described needs, then the slurry of efflorescence is collected, easy and simple to handle, avoid and use blade to scrape the damage that the clear powder of pole piece brings to pole piece, improve the utilance of pole piece, clear powder is more thoroughly clean simultaneously, more be conducive to welding of pole piece and lug, avoid the problem of faulty soldering in welding process, effectively raise the reliability of lithium ion battery, in addition, this clear powder method clears up the slurry collecting efflorescence in time by hairbrush, finger also can not be too much contact pole piece, avoid and secondary pollution is caused to electrodes of lithium-ion batteries, improve the chemical property of lithium ion battery.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of electric heating element heating pole piece in the clear powder method of embodiment of the present invention electrodes of lithium-ion batteries;
Fig. 2 is the schematic diagram clearing away powder in the clear powder method of embodiment of the present invention electrodes of lithium-ion batteries with hairbrush brush;
Fig. 3 is the complete schematic diagram of the clear powder of embodiment of the present invention electrodes of lithium-ion batteries clear powder method battery pole piece;
Fig. 4 is the schematic diagram of pole piece together with tab welding in the clear powder method of embodiment of the present invention electrodes of lithium-ion batteries.
In figure, 1: electric heating element; 2: pole piece; 3: slurry; 4: Copper Foil; 5: hairbrush; 6: lug.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
As depicted in figs. 1 and 2, the clear powder method of electrodes of lithium-ion batteries 2 provided by the invention, the pole piece 2 scribbling positive and negative pole material is put well, on battery pole piece 2, the left side needs the position electric heating element 1 of clear powder to heat, according to the difference of the electrode material in the slurry 3 of coating on pole piece 2, by the heating temperatures to 120 at this position ~ 200 DEG C, to make binding agent sex change in Copper Foil 4 spreading mass 3 and embrittlement, then carry out brush with the position of hairbrush 5 to the clear powder of described needs to sweep, the slurry 3 of efflorescence is swept in collection container the slurry 3 collecting efflorescence or the slurry 3 by dust catcher collection efflorescence, now can obtain clean, without the Copper Foil 4 of powder attachment, this clear powder method is easy and simple to handle, avoid the damage using blade to scrape the clear powder of pole piece 2 to bring to pole piece 2, improve the utilance of pole piece 2, the slurry 3 of efflorescence is collected by hairbrush 5 cleaning in time, finger also can not be too much contact pole piece 2, avoid and secondary pollution is caused to electrodes of lithium-ion batteries 2, powder is collected according to dust catcher, collect powder better effects if.Wherein, the optional electric iron of electric heating element 1.
As shown in Figure 3 and Figure 4, after battery pole piece 2 supernatant powder, by lug 6 be welded on pole piece 2 and clean on the Copper Foil 4 at position, lug 6 and pole piece 2 are linked together, wherein can adopt soldering or spot welding.The inventive method is totally thorough owing to removing powder, and welding is become and is more prone to, welding quality improves, thus greatly can improve the combination property of battery.
Clear powder method of the present invention, when implementing, notices that the heating-up temperature of electric heating element 1 is unsuitable too high also unsuitable too low, if temperature is too high, heat-affected zone is too large, may cause the fusing of Copper Foil 4, affect the performance of lithium ion battery; If temperature too low causing has powder to remain, hairbrush 5 does not wash clean clearly, affects equally welding of pole piece 2 and lug 6, and then affects the combination property of battery.
The clear powder method of the present invention is specially adapted to the manufacture process of ternary material battery and the lithium ion battery such as LiFePO4, cobalt acid lithium.
In sum, the clear powder method of electrodes of lithium-ion batteries 2 provided by the invention adopts electric heating element 1 on battery pole piece 2, need the position of powder clearly to heat, to make binding agent sex change in Copper Foil 4 spreading mass 3 and embrittlement, then carry out brush with the position of hairbrush 5 to the clear powder of described needs to sweep, the slurry 3 of efflorescence is collected in time, remove powder totally thorough, easy and simple to handle, avoid the damage using blade to scrape the clear powder of pole piece 2 to bring to pole piece 2, improve the utilance of pole piece 2, simultaneously due to soldering polar ear 6 on the clean Copper Foil 4 of pole piece 2 supernatant dried bean noodles, the firm welding of pole piece 2 and lug 6, avoid the problem of faulty soldering in welding process, effectively raise the reliability of lithium ion battery, in addition, this clear powder method collects the slurry 3 of efflorescence by hairbrush 5 cleaning in time, finger also can not be too much contact pole piece 2, avoid and secondary pollution is caused to electrodes of lithium-ion batteries 2, improve the chemical property of lithium ion battery, and then improve the combination property of lithium ion battery.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.
Claims (3)
1. a clear powder method for electrodes of lithium-ion batteries, is characterized in that: it comprises the following steps:
S1: heat pole piece needing the position of powder clearly with electric heating element, heating temperatures to 120 ~ 200 DEG C, to make binding agent sex change in metal forming spreading mass and embrittlement, thus makes slurry efflorescence;
S2: carry out brush with the position of hairbrush to the clear powder of described needs and sweep, then collect the slurry of efflorescence.
2. the clear powder method of electrodes of lithium-ion batteries according to claim 1, is characterized in that: in described step S2, by the slurry of efflorescence being swept in collection container the slurry collecting efflorescence or the slurry being collected efflorescence by dust catcher with hairbrush.
3. the clear powder method of electrodes of lithium-ion batteries according to claim 1, is characterized in that: also comprise step S3: soldering polar ear in the metal forming that pole piece supernatant dried bean noodles is clean.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439891.6A CN103531746B (en) | 2013-09-24 | 2013-09-24 | A kind of clear powder method of electrodes of lithium-ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310439891.6A CN103531746B (en) | 2013-09-24 | 2013-09-24 | A kind of clear powder method of electrodes of lithium-ion batteries |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103531746A CN103531746A (en) | 2014-01-22 |
| CN103531746B true CN103531746B (en) | 2016-01-06 |
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| CN201310439891.6A Active CN103531746B (en) | 2013-09-24 | 2013-09-24 | A kind of clear powder method of electrodes of lithium-ion batteries |
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| CN106299527B (en) * | 2016-09-22 | 2019-01-25 | 合肥国轩高科动力能源有限公司 | A kind of recovery method and device of electrodes of lithium-ion batteries |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3902648A1 (en) * | 1989-01-30 | 1990-08-09 | Varta Batterie | GALVANIC ELEMENT |
| CN201038233Y (en) * | 2007-04-12 | 2008-03-19 | 比亚迪股份有限公司 | Supersonic powder-clearing apparatus |
| CN102332623B (en) * | 2011-03-22 | 2013-08-21 | 东莞新能源科技有限公司 | Method for recovering anode material of lithium ion battery |
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| CN103531746A (en) | 2014-01-22 |
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