CN101814633A - Filling solidification method for producing positive electrode and negative electrode of lithium battery and lithium battery containing positive electrode and negative electrode - Google Patents
Filling solidification method for producing positive electrode and negative electrode of lithium battery and lithium battery containing positive electrode and negative electrode Download PDFInfo
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- CN101814633A CN101814633A CN200910008247A CN200910008247A CN101814633A CN 101814633 A CN101814633 A CN 101814633A CN 200910008247 A CN200910008247 A CN 200910008247A CN 200910008247 A CN200910008247 A CN 200910008247A CN 101814633 A CN101814633 A CN 101814633A
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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
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Abstract
The invention discloses a filling solidification method for producing a positive electrode and a negative electrode of a lithium battery and the lithium battery containing the positive electrode and the negative electrode. The lithium battery comprises the positive electrode, the negative electrode and a thin-film diaphragm made of plant paper pulp. The method discloses the filling solidification method for producing the negative electrode and the filling solidification method for producing the positive electrode, wherein the filling solidification method comprises the following steps: evenly mixing and stirring the positive materials such as lithium nickelate (LiNiO2), lithium iron phosphate (LiFePO4), lithium vanadium oxide (VOPO4 and LiVO2), lithium cobalt oxide, lithium manganese oxide and a conductive agent according to a proportion, filling in two sides of a aluminum foil current collector fixed by a clamp, placing in a negative pressure container, heating and evaporating liquid materials, and then solidifying to produce the positive electrode; evenly stirring the negative materials such as one of nature graphite, artificial graphite or coke, an adhesive PTFE or CMC deionized water according to the proportion, filling in two sides of the aluminum foil current collector fixed by the clamp to produce the negative electrode, evaporating the liquid materials in the negative pressure container and solidifying; separating the diaphragm material between the positive and negative electrode materials and interleaving, laminating and assembling, affusing an electrolyte and forming to obtain the secondary lithium battery produced by the filling solidification method of the invention.
Description
Technical field
The present invention relates to a kind of method of making lithium battery, this method comprises makes negative pole filling solidification method, anodal filling solidification method, and diaphragm material is arranged between described negative pole and the described positive pole, and described method may further comprise the steps:
A) with lithium nickelate (LiNiO
2), LiFePO4 LiFePO
4, lithium-barium oxide (VOPO
4, LiVO
2), lithium and cobalt oxides, lithium manganese oxide, the bonding agent conductive agent is filled in the two sides in aluminum foil current collector in proportion after the mixing and stirring, is positive electrode.
B) a step finishes that heating evaporation fluidity thing makes it to solidify in the rearmounted negative-pressure container.
C) a kind of with native graphite, Delanium or coke, bonding agent PTFE or CMC deionized water stir in proportion, fill on the two sides of Copper Foil collector, are negative material.
E) the c step finishes that heating evaporation fluidity thing makes it to solidify in the rearmounted negative-pressure container.
F) b step, e step are separated in intersecting compression fit between positive pole, the negative material with diaphragm material after finishing.
G) lug was reserved in encapsulation after the f step was finished;
H) perfusion electrolyte;
I) change into, discharge gas;
J) sealing exhaust outlet;
K) test parameter obtains the lithium battery that filling solidification method of the present invention is made.
Technical background
The positive and negative material coating thickness of lithium battery is generally 12 microns, and after the compacting 8 microns, the coating of pole piece slurry is to make one of lithium battery positive and negative electrode key, and the positive and negative electrode slurry is a non newtonian type high viscosity fluid; The coating carrier is aluminum foil current collector or the Copper Foil collector of thickness 10～20um, the too thin tension pulling force of rolling up and unreeling technology that draws that can not bear coating machine of aluminium foil, Copper Foil, and too thick meeting increases volume, gains in weight, and reduces specific energy, also can increase cost.
There is following technical barrier in the existing lithium battery positive and negative electrode of making lithium battery:
(1) can not throw off for the filming of active material of lithium battery positive and negative electrode from collector, can not produce slight crack, must add more adhesive, because volume takies, adhesive the more, the active material of positive and negative electrode is just fewer, has not only reduced specific energy, also can internal resistance increase because electron opaque material increases, the performance of loss battery, but the adhesive coating process that can cause again on the low side falls slurry, causes percent defective to increase.(2) active material of positive and negative electrode combines with collector and is difficult to evenly, loose closely knit uneven phenomenon is often arranged, form loose closely knit inequality and must cause current unevenness and the temperature inequality, cause the excessive temperature district, the active material and the collector that cause positive and negative electrode get loose, and cause that further internal resistance strengthens, and existing coating process adopts scraper to scrape slurry, the rolling and the speed that unreels change slightly and can cause that all to scrape slurry irregular, scrape slurry and irregularly are difficult to promptly guarantee that the active material of positive and negative electrode combines evenly with collector.
(3) film coated surface be difficult to accomplish smooth bright and clean, when surface roughness surpasses
The time, electric current may segment set in, current segment is concentrated and is caused interval heating, thereby cause barrier film to destroy and the cycle-index minimizing, but the existing slurry coating process of scraping needs through the coating rolling, unreels the very difficult assurance of rolling by roll extrusion again and dry linting threshing phenomenon can not occur, therefore, also just be difficult to guarantee that surface roughness is no more than
The internal resistance of lithium ion battery and collector mass property have sizable relation, the main material of affluxion body in lithium ion batteries is metal forming (as Copper Foil, an aluminium foil), its function is that the electric current that cell active materials produces is compiled, so that form bigger electric current output, therefore collector should fully contact with active material, and internal resistance should be as far as possible little.The coating process of the active material of cathode of lithium battery requires Copper Foil to have good electrical conductivity, pliability, anti-coiling and spreading, Copper Foil is the carrier of negative active core-shell material in lithium ion battery, be again the collection and the conductor of negative pole electronics, promptly must have good electrical conductivity, the active material of good adhered to negative pole, the adhesion strength of the coating layer of active substance of negative pole is enough high, reach the powder of detached of avoiding negative electrode active material in the charge and discharge cycles process, preventing to discharge and recharge heating expansion contraction causes the active material that adheres to negative pole to peel off substrate, coating stripping will cause the anti-constantly increase of the internal resistance of cell, and circulation volume descends and aggravates.In order to improve adhesion strength, someone strengthens roughness with copper foil surface, but surface roughness is not to be the bigger the better, increase along with surface roughness, easily wetting surface become easier wetting, hydrophily is better, and be difficult to wetting surface become more difficult wetting, hydrophily is poorer, the roughness of copper foil surface is very restive.
The lithium battery positive and negative electrode pole piece technical barrier that existing coating process is made lithium battery also shows the high-quality specific (special) requirements of collector material itself, as:
The coating process quality of the active material of negative pole and the surface density of Copper Foil have very substantial connection, and the surface density of Copper Foil is meant the quality of unit are, reflect the uniformity coefficient of copper thickness, directly influence the coating amount of negative electrode active material.If the fluctuation of the thickness uniformity of Copper Foil is too big, it is in uneven thickness to cause negative material to cause in coating process, and the assembling post gap increases, and further causes internal resistance to increase, and has influence on internal resistance of cell battery capacity and consistency the most at last.Existing collector great majority adopt the cathode copper Copper Foil, and the cathode copper Copper Foil is difficult to the consistency of the surface density of assurance Copper Foil.
The coating process quality of the active material of negative pole and the folding resistance of Copper Foil have very substantial connection, dissimilar lithium ion batteries is also different to the requirement of Copper Foil folding quality, winding process is made lithium battery and is required Copper Foil to have better folding quality, the Copper Foil of folding quality difference may fold in winding process crackle even fracture take place in the link, crackle will influence the density uniformity of active material, also will produce internal resistance changes, the cathode copper Copper Foil has significant difference with the folding quality of calendering copper Copper Foil, can significantly increase cost but roll costing an arm and a leg of copper Copper Foil.
The coating process quality of the active material of negative pole and the tensile strength of Copper Foil and elongation have very substantial connection, Copper Foil must have enough tensile strength and elongation, otherwise, in the process that flattens that the pole piece that is coated with negative electrode active material is rolled, contact performance meeting variation between Copper Foil and active material, make the dimensional stability and the planarization variation of cathode pole piece, elongation causes the active material of negative pole to adhere to former Bit Shift too greatly, the active material of negative pole adheres to former Bit Shift, the rate of finished products that negative pole is made will be influenced, battery capacity, internal resistance and cycle life etc., too for a short time causing of elongation breaks, pull out crackle, the tensile strength of Copper Foil and elongation equally also are very uppity material properties.
The coating process of the active material of positive pole, negative pole adopts common hot blast convective drying method or drying cylinder heat conduction seasoning drying, drying efficiency is low, the solvent evaporates amount is big, it is serious to cause cost to increase environmental pollution, dried coating often has quality problems such as take place in outer the doing to chap in wet or surface, and chapping in the surface also to produce the internal resistance increase.
Manufacturing process anodal, cathode pole piece adopts identical coating process, and the defective of the coating process of the active material of negative pole exists simultaneously in the anode pole piece manufacturing.
Improve the approach of lithium battery positive and negative electrode pole piece specific energy:
Adopt punching aluminium foil, copper foil material carrier, after the foil punching, both kept the ultra-thin advantage of foil, also can make pole piece do thinlyyer as the active material of anodal, negative pole, thereby, minimizing finished product volume of battery and weight when the capacity that waits; Carrier is porose when making extractant, and organic solvent flows by eyelet, improves drying property, and a part of active material can be embedded in aluminium foil, the Copper Foil hole, thereby the active material of inserting can be more, improved battery capacity under the equal volume.But because there is the dynamic characteristics with tension of drawing that unreels rolling in existing coating process, the tensile strength and the elongation of punching aluminium foil, copper foil material all have problems.
Reduce the consumption of bonding agent, reduce internal resistance, improve active material density anodal, negative pole, thereby improve the lithium battery specific energy and improve the lithium battery performance, but, because existing coating process is difficult to reduce electron opaque material bonding agent consumption, in order to improve the trend that coating speed strengthens electron opaque material bonding agent consumption in addition for fear of falling slurry because of the adhesive property difference.
Summary of the invention
The invention provides the existing coating process of a kind of improvement and make lithium battery anode, the filling solidification method of negative pole, filling solidification method is to walk the sheet skew and fall slurry at coating process, problems such as bonding agent consumption increase internal resistance bigger than normal, by the positioning and fixing collector, fill in positive pole on the collector two sides, the negative electrode active material slurry, by heating and drying method drying in the negative-pressure container, the anchor clamps of removing the fixed set fluid just can obtain lithium battery, cathode pole piece, will be just, cathode pole piece is isolated closed assembly with barrier film, in parallel respectively anodal, the lug of negative pole, the packaged battery shell changes into then again, exhaust can obtain the lithium battery of technical solution of the present invention.
Positive effect of the present invention: by heating and drying method drying in the negative-pressure container, just can overcome making, wet and surface quality problems such as chap in negative pole is done outward, heating evaporation under the condition that in negative-pressure container, retrains, can reclaim solvent NMP-methyl pyrrolidone fully, both saved cost, alleviated environmental pollution again, the NMP-methyl pyrrolidone, be a kind of be raw material with the gamma-butyrolacton, form liquid, volatility with the methylamine condensation, permeability is extremely strong, pH value is a 7-9 alkalescence, inflammable and explosive, heating evaporation easily reclaims under the condition that retrains in negative-pressure container, can improve the work production security.
In negative-pressure container, fill in positive pole, negative electrode active material slurry, positive pole, negative electrode active material slurry are than the better flowability of coating process, can improve the density uniformity that positive pole, cathode size adhere at collection liquid surface, thereby overcome because the internal resistance anodal, that negative pole particle gap lack of homogeneity causes increases.
The filling solidification method of anodal, negative pole need not rolling unreels draws dependent power operation with tension, also just need not consider the tensile strength and the elongation of aluminium foil, copper foil material, can adopt punching aluminium foil, copper foil material is collector as the carrier of the active material of positive pole, negative pole, thereby, also just have an opportunity to improve the specific energy of lithium battery, also have an opportunity to reduce the consumption of aluminium foil, copper foil material, thereby reduce cost.
The perfusion face of the anchor clamps clamping plate of fixed set fluid can adopt mirror finish, and anodal, cathode size fills in that can to obtain surfacing in the minute surface clamping plate bright and clean, reaches surface roughness and is better than
Thereby it is super to overcome surface roughness
The time, current segment is concentrated, and causes interval heating.
Realize the technical scheme of above-mentioned purpose
The filling solidification method preparation and the manufacturing lithium battery of lithium battery anode, negative pole comprise the following steps:
The first step: with lithium and cobalt oxides, lithium manganese oxide, conductive agent: acetylene black, conductive carbon black, electrically conductive graphite, bonding agent, polyvinylidene fluoride, the NMP-methyl pyrrolidone stirs after mixing in proportion, is positive electrode;
Second step: a kind of with native graphite, Delanium or coke, bonding agent PTFE or CMC deionized water stir in proportion, are negative material;
The 3rd goes on foot: aluminum foil current collector is placed with reference to Fig. 2 collector fill on the anchor clamps, put in the negative-pressure container;
The 4th step: the positive electrode injection is filled in into anchor clamps, be distributed in the two sides of aluminum foil current collector;
The 5th step: negative-pressure container continues to take out negative pressure, heating synchronously, 80～120 ℃ of heating-up temperatures, liquid evaporation, positive electrode drying;
The 6th step: from fill in anchor clamps, take out, i.e. the lithium battery anode pole piece;
The 7th goes on foot: the Copper Foil collector is placed with reference to Fig. 2 collector fill on the anchor clamps, put in the negative-pressure container;
The 8th step: the negative material injection is filled in into anchor clamps, be distributed in the two sides of Copper Foil collector;
The 9th step: negative-pressure container continues to take out negative pressure, heating synchronously, 120～180 ℃ of heating-up temperatures, liquid evaporation, negative material drying;
The tenth step: with reference to Fig. 3 diaphragm material is separated in intersecting assembling between positive pole, the negative material, compresses;
The 11 the step: with reference to Fig. 1, plus plate current-collecting body, negative current collector have chimb, respectively with the plus plate current-collecting body chimb with its parallel connection be welded as positive pole ear, negative current collector has chimb that its parallel connection is welded as negative lug;
The 12 step: be packaged in the battery case, reserve the lug sealing;
The 13 step: perfusion; By electrolytic salt LiPF
6The non-aqueous commodity electrolyte that (hexafluorophosphate) and nonaqueous solvents EC (dimethyl carbonate), DEC (ethylene carbonate) and DMC (carbonic acid diene ester) form in proportion;
The 14 step: change into, discharge gas;
The 15 step: sealing exhaust outlet;
The 16 step: test parameter obtains filling solidification method of the present invention and makes serondary lithium battery.
Described positive electrode can also adopt lithium nickelate (LiNiO
2) LiFePO4 LiFePO
4, lithium-barium oxide (VOPO
4, LiVO
2)
The technical scheme that realizes purpose of the present invention can also adopt following technical step:
The first step: with lithium and cobalt oxides, lithium manganese oxide, conductive agent: acetylene black, conductive carbon black, electrically conductive graphite, bonding agent: polyvinylidene fluoride, the NMP-methyl pyrrolidone stirs after mixing in proportion, is positive electrode;
Second step: a kind of with native graphite, Delanium or coke, bonding agent PTFE or CMC deionized water stir in proportion, are negative material;
The 3rd goes on foot: aluminum foil current collector is placed with reference to Fig. 2 collector fill on the anchor clamps, put in the negative-pressure container;
The 4th step: anchor clamps are filled in the positive electrode injection, be distributed in the two sides of aluminum foil current collector;
The 5th step: negative-pressure container continues to take out negative pressure, heating synchronously, 80～120 ℃ of heating-up temperatures, liquid evaporation, positive electrode drying;
The 6th step: from fill in anchor clamps, take out, i.e. the lithium battery anode pole piece;
The 7th goes on foot: the Copper Foil collector is placed with reference to Fig. 2 collector fill on the anchor clamps, put in the negative-pressure container;
The 8th step: anchor clamps are filled in the negative material injection, be distributed in the two sides of Copper Foil collector;
The 9th step: negative-pressure container continues to take out negative pressure, heating synchronously, 120～180 ℃ of heating-up temperatures, liquid evaporation, negative material drying;
The tenth step: the two isobutyls of two (methyl) polyalkylene glycol acrylate ester, multi-functional epoxy's ethane, vinylacetate, nitrogen are fine, triethylamine, LiPF
6The commercial polymer electrolyte that (hexafluorophosphate) ethylene carbonate is made in proportion is separated in stacked assembling between positive pole, the negative material, compresses;
The 11 the step: with reference to Fig. 1, plus plate current-collecting body, negative current collector have chimb, respectively with the plus plate current-collecting body chimb with its parallel connection be welded as positive pole ear, negative current collector has chimb that its parallel connection is welded as negative lug;
The 12 step: be packaged in the battery case, reserve the lug sealing;
The 13 step: change into, discharge gas in the shell;
The 14 step: sealing exhaust outlet;
The 15 step: test parameter obtains filling solidification method of the present invention and makes serondary lithium battery.
Described positive electrode can also adopt lithium nickelate (LiNiO
2) LiFePO4 LiFePO
4, lithium-barium oxide (VOPO
4, LiVO
2).
Described negative material is acetylene black, conductive carbon black, electrically conductive graphite, can also adopt Li
4Ti
5O
12Negative material.
Described diaphragm material is: microporous polypropylene membrane, polyethene microporous membrane or, triethylamine fine by two (methyl) polyalkylene glycol acrylate ester, multi-functional epoxy's ethane, vinylacetate, the two isobutyls of nitrogen, LiPF
6The polymer electrolyte that (hexafluorophosphate) ethylene carbonate is made in proportion owing to adopt the stacking technique of non-coiling, need not be considered thin-film material tensile strength, the thin-film material that can also adopt plant paper pulp to make.
Described aluminum foil current collector can adopt the atresia aluminium foil, because the non-volume that drags of this technology unreels coating process, need not consider the tensile strength of aluminium foil, also can adopt porose aluminium foil.
Described Copper Foil collector can adopt the atresia Copper Foil, because the non-volume that drags of this technology unreels coating process, need not consider the tensile strength of Copper Foil paper tinsel, also can adopt porose Copper Foil.
Description of drawings
Fig. 1 is a positive and negative electrode pole piece schematic diagram of the present invention;
Figure 1A is the A-A cutaway view of Fig. 1;
Fig. 2 is that the present invention fills in the clamp structure schematic diagram;
Fig. 3 is a lamination assembling schematic diagram of the present invention;
Fig. 4 is a positive and negative electrode pole piece collector schematic diagram of the present invention;
Fig. 1, among Figure 1A, positive electrode, negative material 1, collector 2, chimb lug 9;
Among Fig. 2, positive electrode, negative material 1, collector 2, clamping plate 3, the perfusion slurry side plane of clamping plate 3 must be processed minute surface, clamping screw 4, locking nut 5, slurry feed runner 6;
Among Fig. 3, anode pole piece 7, cathode pole piece 8, barrier film 10;
Specific embodiment
Positive pole is made by the following method:
The first step: get 89wt% lithium and cobalt oxides (LiCoO
2), 4wt% acetylene black conductive materials, 2wt% Kynoar (PVDF) is made bonding agent, and the 5wt%NMP-methyl pyrrolidone is made solvent, mixes, and it is standby to stir;
Second step: with aluminum foil current collector 2, place in the middle of two clamping plate 3 of filling in anchor clamps, with its locking, put in the negative-pressure container with clamping screw 4, locking nut 5 with reference to Fig. 2 collector 2;
The 3rd step: positive electrode is injected the slurry feed runner 6 of filling in anchor clamps, be distributed in the two sides of aluminum foil current collector 2;
The 4th step: negative-pressure container continues to take out negative pressure, heating synchronously, 80～120 ℃ of heating-up temperature scopes, 90～100 ℃ of preferred heating-up temperatures, liquid evaporation, positive electrode drying;
The 5th step: pole piece is taken out from fill in anchor clamps, i.e. the lithium battery anode pole piece;
Negative pole is made by the following method:
The first step: get the native graphite micro mist of 92wt%, the Kynoar adhesive of 6wt%, the 2wt%NMP-methyl pyrrolidone is made solvent, mixes, and it is standby to stir;
Second step: place two clamping plate 3 of filling in anchor clamps middle with reference to Fig. 2 collector Copper Foil collector 2, with its locking, put in the negative-pressure container with clamping screw 4, locking nut 5;
The 3rd step: negative material is injected the slurry feed runner 6 of filling in anchor clamps, be distributed in the two sides of Copper Foil collector;
The 4th step: negative-pressure container continues to take out negative pressure, range of negative pressure 50Pa～4000Pa, preferred 500Pa～4000Pa, heating synchronously, 120～180 ℃ of heated perimeters, 110～130 ℃ of preferred heating-up temperatures, liquid evaporation, negative material drying;
The 5th step: pole piece is taken out from fill in anchor clamps, i.e. lithium battery cathode pole piece;
The battery assembling
The first step: barrier film 10 is separated in intersecting assembling between positive pole 7, the negative pole 8 with reference to Fig. 3;
Second step: with reference to Fig. 1, plus plate current-collecting body 2, negative current collector 2 have chimb lug 9, respectively with 9 parallel connections of plus plate current-collecting body 2 chimb lugs, are welded as positive pole ear, negative current collector 2 has chimb lug 9 with its parallel connection, is welded as negative lug;
The 3rd step: reserve lug, be packaged in the battery case;
The 4th step: perfusion; By electrolytic salt LiPF
6The non-aqueous commodity electrolyte that (hexafluorophosphate) and nonaqueous solvents EC (dimethyl carbonate), DEC (ethylene carbonate) and DMC (carbonic acid diene ester) form in proportion;
The 5th step: change into, discharge gas;
The 6th step: sealing exhaust outlet;
The 7th step: test parameter obtains the lithium battery that filling solidification method of the present invention is made.
Claims (7)
1. filling solidification method is made lithium battery anode (7), negative pole (8) and is contained the lithium battery of this positive pole (7), negative pole (8), this battery comprises negative pole (8), anodal (7), barrier film (10), the step that this method comprises is: positive electrode is filled in the two sides that is set in aluminum foil current collector (2) constitute anodal (7), negative material is filled in the two sides that is set in Copper Foil collector (2) constitute negative pole (8), and barrier film (10) is placed between described positive pole (7) and the described negative pole (8), and described method may further comprise the steps:
Positive pole is made by the following method:
The first step: get positive electrode, LiCoO
2, LiNiO
2, LiFePO
4, VOPO
4, LiVO
2A kind of 89wt% that accounts for mixture, the acetylene black conductive materials accounts for the 4wt% of mixture, Kynoar accounts for the 2wt% of mixture as bonding agent, the NMP-methyl pyrrolidone accounts for the 5wt% of mixture as solvent, mixes, it is standby to stir;
Second step: with aluminum foil current collector (2), place in the middle of two clamping plate (3) of filling in anchor clamps, with its locking, put in the negative-pressure container with clamping screw (4), locking nut (5);
The 3rd step: positive electrode is injected the slurry feed runner (6) of filling in anchor clamps, be distributed in the two sides of aluminum foil current collector (2);
The 4th step: negative-pressure container continues to take out negative pressure, heating synchronously, 80～120 ℃ of heating-up temperature scopes, 90～100 ℃ of preferred heating-up temperatures, liquid evaporation, positive electrode drying;
The 5th step: pole piece is taken out from filling in anchor clamps, i.e. lithium battery anode (7);
Negative pole is made by the following method:
The first step: get negative material, acetylene black, conductive carbon black, electrically conductive graphite, Li
4Ti
5O
12A kind of 92wt% that accounts for mixture that accounts for mixture, the Kynoar adhesive of 6wt%, the 2wt%NMP-methyl pyrrolidone is made solvent, mixes, it is standby to stir;
Second step: Copper Foil collector (2) is placed in the middle of two clamping plate (3) of filling in anchor clamps, with its locking, put in the negative-pressure container with clamping screw (4), locking nut (5);
The 3rd step: negative material is injected the slurry feed runner (6) of filling in anchor clamps, be distributed in the two sides of Copper Foil collector (2);
The 4th step: negative-pressure container continues to take out negative pressure, range of negative pressure 50Pa～4000Pa, preferred 500Pa～4000Pa, heating synchronously, 120～180 ℃ of heated perimeters, 110～130 ℃ of preferred heating-up temperatures, liquid evaporation, negative material drying;
The 5th step: pole piece is taken out from filling in anchor clamps, i.e. cathode of lithium battery (8);
The battery assembling
The first step: barrier film (10) is separated in intersecting assembling between positive pole (7), the negative pole (8);
Second step: plus plate current-collecting body (2), negative current collector (2) have chimb lug (9), respectively with plus plate current-collecting body (2) chimb lug with its parallel connection, be welded as positive pole ear (9), negative current collector (2) has chimb lug (9) with its parallel connection, is welded as negative lug;
The 3rd step: be packaged in the battery case, reserve the lug sealing;
The 4th step: pour into non-aqueous commodity electrolyte;
The 5th step: change into, discharge gas;
The 6th step: sealing exhaust outlet;
The 7th step: test parameter, obtain the lithium battery that filling solidification method of the present invention is made, it is characterized in that described collector (2) has chimb lug (9).
2. filling solidification method according to claim 1 is made lithium battery anode (7), negative pole (8), it is characterized in that the plane of the perfusion slurry side of described clamping plate (3) is a minute surface.
3. filling solidification method according to claim 1 is made lithium battery anode (7), negative pole (8), it is characterized in that, described collector (2) places in the middle of two clamping plate (3) of filling in anchor clamps, uses clamping screw (4), locking nut (5) with its locking.
4. filling solidification method according to claim 1 is made lithium battery anode (7), negative pole (8), it is characterized in that the described negative pressure of taking out, range of negative pressure 50Pa～4000Pa, preferred 500Pa～4000Pa.
5. filling solidification method according to claim 1 is made lithium battery anode (7), negative pole (8), it is characterized in that described synchronous heating, 80～120 ℃ of heating-up temperature scopes, preferred heating-up temperature≤100 ℃.
6. filling solidification method according to claim 1 is made lithium battery anode (7), negative pole (8), it is characterized in that described barrier film (10) is the film that plant paper pulp is made.
7. filling solidification method according to claim 1 is made lithium battery anode (7), negative pole (8), it is characterized in that the described anchor clamps of filling in have slurry feed runner (6).
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|---|---|---|---|
| CN200910008247A CN101814633A (en) | 2009-02-19 | 2009-02-19 | Filling solidification method for producing positive electrode and negative electrode of lithium battery and lithium battery containing positive electrode and negative electrode |
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| CN105679998A (en) * | 2011-04-15 | 2016-06-15 | 株式会社半导体能源研究所 | Method for manufacturing positive electrode and power storage device |
| CN106410212A (en) * | 2016-12-12 | 2017-02-15 | 上海电气钠硫储能技术有限公司 | Sodium-sulphur battery anode current collector |
| CN110128140A (en) * | 2019-04-29 | 2019-08-16 | 内蒙古工业大学 | A kind of ytterbium aluminium codope carbuncle type Li7La3Zr2O12Lithium Ionic Conducting Materials and preparation method thereof |
| CN113471437A (en) * | 2021-06-18 | 2021-10-01 | 力博特电源科技（广州）有限公司 | Method for improving density of lithium iron phosphate battery |
| CN115377015A (en) * | 2022-08-29 | 2022-11-22 | 北京超材信息科技有限公司 | Packaging structure of electronic device and manufacturing method |
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2009
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| CN105679998A (en) * | 2011-04-15 | 2016-06-15 | 株式会社半导体能源研究所 | Method for manufacturing positive electrode and power storage device |
| CN106410212A (en) * | 2016-12-12 | 2017-02-15 | 上海电气钠硫储能技术有限公司 | Sodium-sulphur battery anode current collector |
| CN106410212B (en) * | 2016-12-12 | 2023-05-26 | 江苏先进无机材料研究院 | Positive electrode current collector of sodium-sulfur battery |
| CN110128140A (en) * | 2019-04-29 | 2019-08-16 | 内蒙古工业大学 | A kind of ytterbium aluminium codope carbuncle type Li7La3Zr2O12Lithium Ionic Conducting Materials and preparation method thereof |
| CN113471437A (en) * | 2021-06-18 | 2021-10-01 | 力博特电源科技（广州）有限公司 | Method for improving density of lithium iron phosphate battery |
| CN115377015A (en) * | 2022-08-29 | 2022-11-22 | 北京超材信息科技有限公司 | Packaging structure of electronic device and manufacturing method |
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