CN104979550A - Novel 3V lithium ion battery capable of cyclically charging and discharging and manufacturing process of novel 3V lithium ion battery - Google Patents
Novel 3V lithium ion battery capable of cyclically charging and discharging and manufacturing process of novel 3V lithium ion battery Download PDFInfo
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- CN104979550A CN104979550A CN201510336258.3A CN201510336258A CN104979550A CN 104979550 A CN104979550 A CN 104979550A CN 201510336258 A CN201510336258 A CN 201510336258A CN 104979550 A CN104979550 A CN 104979550A
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/621—Binders
- H01M4/622—Binders being polymers
- H01M4/623—Binders being polymers fluorinated polymers
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
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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 present invention discloses a novel 3V lithium ion battery capable of cyclically charging and discharging and a manufacturing process of the novel 3V lithium ion battery. The novel 3V lithium ion battery comprises a positive electrode with the working voltage of 4.5-4.7V, a negative electrode with the working voltage of 1.55V, an electrolyte or a polymer electrolyte, a diaphragm and a rigid housing, wherein the positive electrode, the diaphragm and the negative electrode are rolled to form a roll core, and the roll core is arranged in the rigid housing; the positive electrode comprises a positive electrode current collector, a positive electrode active material layer and a positive electrode lead, the positive electrode active material layer is coated on the positive electrode current collector, and the positive electrode current collector is connected with a cap by the positive electrode lead; the negative electrode comprises a negative electrode current collector, a negative electrode active material layer and a negative electrode lead, the negative electrode active material layer is coated on the negative electrode current collector, and the negative electrode current collector is connected with the rigid housing by the negative electrode lead; an electrolyte solute is LiPF6, and a solvent is a mixed liquid electrolyte of propylene carbonate, ethylene carbonate and dimethyl carbonate; and the diaphragm is a porous high-polymer polyethylene film.
Description
Technical field
The present invention relates to battery process technical field, particularly relate to a kind of 3V lithium ion battery and manufacturing process of novel discharge and recharge capable of circulation.
Background technology
3V battery is widely used in all kinds of instrument and meter, computer motherboard, mobile communication, blood glucose monitoring system, ear thermometer, remote controller and other home electronic appliance products.Along with the progress of science and technology and the requirement of environmental protection, people need high energy, environmental protection, safe chemical power source product to meet the demand of productive life.
At present, the 3V battery generally used in these areas mainly contains three kinds.A kind of is traditional disposable battery (as general dry battery, alkaline battery), and its operating voltage is generally 1.5V, in use, is used by two serial battery composition 3V batteries.The second is disposable lithium-manganese dioxide battery, and this battery take metal lithium sheet as negative pole, and operating voltage is 3V, and energy is higher, but lithium metal has quite high chemism, may produce the safety problem of blast etc. in use procedure.Above two kinds are disposable battery, cannot carry out charging cycle use, cause the significant wastage of resource.The third for 3V battery be secondary cell (can repeat discharge and recharge use); Generally refer to LiFePO 4 material to be positive pole, lithium ion battery that graphite is negative pole, use voltage range 2.0V-3.3V, recycle more than 2000 times.
Summary of the invention
The object of this invention is to provide a kind of 3V lithium ion battery and manufacturing process of novel discharge and recharge capable of circulation, the application of 3V battery string product can be met, this battery product have good cycle, security performance high, pollution-free, make the advantages such as simple.
The technical solution used in the present invention is:
A 3V lithium ion battery for novel discharge and recharge capable of circulation, comprises positive pole that operating voltage is 4.5V-4.7V, negative pole that operating voltage is 1.55V, electrolyte or polymer dielectric, barrier film and rigidity shell; Positive pole and negative pole centre arrange barrier film and separate, and positive pole, barrier film and negative pole are rolled into core, and core is located at rigidity enclosure;
Described positive pole comprises plus plate current-collecting body, positive electrode active material layer and positive wire, positive electrode active material layer is coated on plus plate current-collecting body, plus plate current-collecting body connects block by positive wire, and positive electrode active material layer is made up of positive active material, anode activated charcoal, positive conductive agent and positive electrode binder; Positive active material adopts spinel-type high voltage nickel-manganese binary positive material nickel ion doped LiNi
0.5mn
1.5o
4, positive electrode binder adopts the mixture of Kynoar and butadiene-styrene rubber, and positive conductive agent adopts the mixture of acetylene black and Ketjen black carbon fiber;
Described negative pole comprises negative current collector, negative electrode active material layer and negative wire, negative electrode active material layer is coated on negative current collector, negative current collector connects rigidity shell by negative wire, and negative electrode active material layer is made up of negative electrode active material, cathode conductive agent and negative electrode binder; Described negative electrode active material adopts titanium oxide lithium, and cathode conductive agent adopts the mixture of acetylene black and Ketjen black carbon fiber, and negative electrode binder adopts the mixture of CMC.SBR, butadiene-styrene rubber, epoxy resin and nylon;
Described electrolyte solute adopts LiPF
6, solvent is the mixing material electrolyte of propene carbonate, ethylene carbonate and dimethyl carbonate;
Described barrier film adopts the thin film of polyphosphazene polymer second of Porous.
Described plus plate current-collecting body adopts Al, and negative current collector adopts Cu.
The manufacturing process of the 3V lithium ion battery of described discharge and recharge novel capable of circulation: comprise the following steps:
Steps A: positive pole material layer and negative material layer material requested are prepared burden
Powder needed for positive electrode material layer is weighed according to following mass ratio formula: positive active material 94.93%, anode activated charcoal 0.32%, positive conductive agent 2.85% and positive electrode binder 1.90%;
Powder needed for negative material layer is weighed according to following mass ratio formula: negative electrode active material 92%, cathode conductive agent 2.5% and negative electrode binder 5.5%;
Step B: baking, dewaters, makes slurry
Each powder in steps A is toasted respectively, removing moisture; Again the powder needed for positive electrode material layer is mixed with organic solvent NMP, together put into double-planet mixing apparatus and carry out uniform stirring, be mixed into anode sizing agent; By the powder needed for negative material layer and deionized water, together put into double-planet mixing apparatus and carry out uniform stirring, be mixed into cathode size, batching completes;
Step C: process of sieving
The anode sizing agent obtained in steps A and cathode size are carried out respectively by screen cloth process of sieving, removing particle;
Step D: coating process
By liquid anode sizing agent excessively sieved in step B or cathode size, correspondence is uniformly coated on plus plate current-collecting body or negative current collector, plus plate current-collecting body and the equal two sided coatings of negative current collector, and two sides consistent in density;
Step e: again toast
Coated plus plate current-collecting body and negative current collector are put into vacuum oven baking, Flue curing parameter is: temperature 110 °, baking time 12h, and baking object is the organic solvent NMP on removing plus plate current-collecting body, the deionized water on removing negative current collector;
Step F: tab welding
By welding anode ear corresponding on the plus plate current-collecting body after coating in step C or negative current collector or negative electrode lug, anode ear is positive wire, and negative electrode lug is negative wire;
Step G: by the product rubberizing in step D, dedusting;
Step H: winding
Positive pole and negative pole being rolled by sutomatic winding machine or stack up, positive pole and negative pole centre barrier film separate, and form core;
Step I: enter shell
The core spooled is put into rigidity housings, and rigidity outer casing bottom adds a lower insulation spacer, and top adds a upper insulation spacer, prevents short circuit;
Step J: the some end
By energy storage welding robot by negative pole lug welding to rigidity outer casing bottom;
Step K: core is toasted
The vacuum drying oven core spooled being placed on temperature 80 ° carries out vacuum bakeout, baking time 12 hours, removing moisture;
Step L: fluid injection
Carry out fluid injection with fluid injection machine to the complete battery core of baking, liquid is exactly electrolyte;
Step M: some block
Be welded to by anode ear on block, block is an explosion-protection equipment above positive pole, seals with rigidity housing contacts;
Step N: sealing
Block and rigidity shell upper are sealed by closing machine, completes.
The present invention uses Li, Ni, Mn oxide to manufacture positive pole as positive active material, and mix with positive electrode ultrasonic disperse equipment with a kind of organic solvent (N-first class pyrrolidones) and binding agent (polyvinylidene fluoride) or ptfe emulsion, be coated in aluminium foil surface and dry and be made into positive plate; Titanium oxide lithium is used to manufacture negative pole for negative electrode active material, aluminium strip is used to be welded on aluminium foil, mix with negative material ultrasonic disperse equipment with a kind of organic solvent (N-first class pyrrolidones) and binding agent (polyvinylidene fluoride), be coated in aluminium foil surface and be made into negative plate; Aluminium nickel composite tape is used to be connected on aluminium foil.Operating voltage due to positive active material is 4.5-4.7V(vs Li/Li+), negative electrode active material operating voltage is about 1.55V (vs Li/Li+), the lithium ion battery voltage using positive/negative plate assembling is about 3.0V, operating voltage 2.0V-3.0V, meets the application of 3V battery string product; This battery product has the advantages such as good cycle, security performance be high, pollution-free, can meet N
xinstructions for use under 3V condition of work, can substitute the application of 3V disposable battery completely.
Accompanying drawing explanation
Fig. 1 is lithium battery structure schematic diagram of the present invention;
Fig. 2 is technique Making programme block diagram part A of the present invention;
Fig. 3 is technique Making programme block diagram part B of the present invention.
Embodiment
As shown in Figure 1,2 and 3, the present invention includes comprise positive pole 1 that operating voltage is 4.5V-4.7V, negative pole 2 that operating voltage is 1.55V, electrolyte or polymer dielectric, barrier film 4 and rigidity shell 5; Positive pole 1 and negative pole 2 centre arrange barrier film 4 and separate, and positive pole 1, barrier film 4 and negative pole 2 are rolled into core, and it is inner that core is located at rigidity shell 5;
Described positive pole 1 comprises plus plate current-collecting body, positive electrode active material layer and positive wire, positive electrode active material layer is coated on plus plate current-collecting body, and connecting positive wire by plus plate current-collecting body, positive electrode active material layer is made up of positive active material, anode activated charcoal, positive conductive agent and positive electrode binder; Positive active material adopts spinel-type high voltage nickel-manganese binary positive material nickel ion doped LiNi
0.5mn
1.5o
4, positive electrode binder adopts the mixture of Kynoar and butadiene-styrene rubber, and positive conductive agent adopts the mixture of acetylene black and Ketjen black carbon fiber;
Described negative pole 2 comprises negative current collector, negative electrode active material layer and negative wire 3, negative electrode active material layer is coated on negative current collector, and connecting negative wire 3 by negative current collector, negative electrode active material layer is made up of negative electrode active material, cathode conductive agent and negative electrode binder; Described negative electrode active material adopts titanium oxide lithium, and cathode conductive agent adopts the mixture of acetylene black and Ketjen black carbon fiber, and negative electrode binder adopts the mixture of CMC.SBR, butadiene-styrene rubber, epoxy resin and nylon;
Described electrolyte solute adopts LiPF
6, solvent is the mixing material electrolyte of propene carbonate, ethylene carbonate and dimethyl carbonate;
Described barrier film 4 adopts the thin film of polyphosphazene polymer second of Porous.
Described plus plate current-collecting body adopts Al, and negative current collector adopts Cu.
The manufacturing process of the 3V lithium ion battery of described discharge and recharge novel capable of circulation, is characterized in that: comprise the following steps:
Steps A: positive pole material layer and negative material layer material requested are prepared burden
Powder needed for positive electrode material layer is weighed according to following mass ratio formula: positive active material 94.94%, anode activated charcoal 0.32%, positive conductive agent 2.85% and positive electrode binder 1.90%;
Powder needed for negative material layer is weighed according to following mass ratio formula: negative electrode active material 92%, cathode conductive agent 2.5% and negative electrode binder 5.5%;
Step B: baking, dewaters, makes slurry
Each powder in steps A is toasted respectively, removing moisture; Again the powder needed for positive electrode material layer is mixed with organic solvent NMP, together put into double-planet mixing apparatus and carry out uniform stirring, be mixed into anode sizing agent; By the powder needed for negative material layer and deionized water, together put into double-planet mixing apparatus and carry out uniform stirring, be mixed into cathode size, batching completes;
Step C: process of sieving
The anode sizing agent obtained in steps A and cathode size are carried out respectively by screen cloth process of sieving, removing particle;
Step D: coating process
By liquid anode sizing agent excessively sieved in step B or cathode size, correspondence is uniformly coated on plus plate current-collecting body or negative current collector, plus plate current-collecting body and the equal two sided coatings of negative current collector, and two sides consistent in density;
Step e: again toast
Coated plus plate current-collecting body and negative current collector are put into vacuum oven baking, Flue curing parameter is: temperature 110 °, baking time 12h, and baking object is the organic solvent NMP on removing plus plate current-collecting body, the deionized water on removing negative current collector;
Step F: tab welding
By welding anode ear corresponding on the plus plate current-collecting body after coating in step C or negative current collector or negative electrode lug, anode ear is positive wire, and negative electrode lug is negative wire 3;
Step G: by the product rubberizing in step D, dedusting;
Step H: winding
By sutomatic winding machine, positive pole 1 and negative pole 2 are rolled or stacked up, positive pole 1 and negative pole 2 centre barrier film 4 separate, and form core;
Step I: enter shell
The core spooled be put into inside rigidity shell 5, add a lower insulation spacer 8 bottom rigidity shell 5, top adds a upper insulation spacer 7, prevents short circuit;
Step J: the some end
By energy storage welding robot by bottom negative pole lug welding to rigidity shell 5;
Step K: core is toasted
The vacuum drying oven core spooled being placed on temperature 80 ° carries out vacuum bakeout, baking time 12 hours, removing moisture;
Step L: fluid injection
Carry out fluid injection with fluid injection machine to the complete battery core of baking, liquid is exactly electrolyte;
Step M: some block
Be welded to by anode ear on block, block is positive pole 1 explosion-protection equipment above, contacts to be formed to seal with rigidity shell 5;
Step N: sealing
Block and rigidity shell 5 top are sealed by closing machine, completes.
As shown in Figure 1, be structural representation of the present invention, separated between positive pole 1 and negative pole 2 by barrier film 4, negative pole 2, at skin, is then barrier film 4, and inside is positive pole 1, and namely negative pole 2 wraps positive pole 1.The core spooled, two all adds the insulating trip of PET material, then core is put into box hat or with laminated aluminum film, box hat top adds upper cap, and forming block for anode 1, is battery cathode 2 bottom box hat.
The positive electrode active material layer of positive pole 1 mainly adopts positive active material to be the material of spinel-type high voltage nickel-manganese binary positive pole 1 material nickel ion doped, there is the many merits such as voltage is high, energy density is high, relative inexpensiveness, both there is the plurality of advantages of LiMn2O4, possessed again the new features that some LiMn2O4s do not have simultaneously due to mixing of nickel.Anode activated charcoal is adsorbed and the charge/discharge capabilities being separated (be not by chemical reaction but pass through physical reactions) and improving positive pole 1 by lithium ion.Positive electrode binder mainly to improve between positive active material particle and with the adhesive property of plus plate current-collecting body, binding agent adopts Kynoar and butadiene-styrene rubber mixture.Positive conductive agent, for electrode provides excellent conductive performance.Negative electrode active material preferential oxidation titanium lithium.Negative electrode binder mainly to improve between anode active material particles and with the adhesive property of negative current collector, binding agent adopts the mixtures such as CMC.SBR, butadiene-styrene rubber, epoxy resin and nylon.Cathode conductive agent provides excellent conductive performance for electrode.
Electrolyte plays the effect of conduction electron in the battery between both positive and negative polarity, be the guarantee that lithium ion battery obtains the advantage such as high voltage, high specific energy.Electrolyte is generally by highly purified organic solvent, electrolyte lithium salt (lithium hexafluoro phosphate, LiFL
6), the raw material such as necessary additive, under certain condition, formulated by a certain percentage.The material table composed as follows table 1 of electrolyte of the present invention:
Table 1
Electrolytical select the performance impact of lithium ion battery very large, it must be that chemical stability is good, especially under higher current potential and in higher temperature environment, not easily decomposes, there is higher ionic conductivity, and must be inertia to anode and cathode material, can not corruption be invaded.Because lithium ion battery charge and discharge potential is higher, and anode material is embedded with the larger lithium of chemism, so electrolyte must adopt organic compound and can not contain water.But organic substance ionic conductivity is all bad, so soluble conducting salt will be added in organic solvent to improve ionic conductivity.Current lithium ion battery mainly uses liquid electrolyte, its solvent is that anhydrous organic substance is as EC (ethyl carbonate), PC (p ropylenecarbonate), DMC (dim ethyl carbonate), DEC (diethyl carbonate), most employing mixed solvent, as EC
2dMC and PC
2dMC etc.Conducting salt has LiC
lo
4, LiPF
6, LiBF
6, LiAsF
6and LiOSO
2cF
3, their conductance sizes are followed successively by LiAsF
6> LiPF
6> LiClO
4>LiBF
6> LiOSO
2cF
3.LiClO
4easily there is the safety issues such as blast because having higher oxidizability, being generally confined in experimental study; LiAsF
6the higher easy purifying of ionic conductivity and stability are better, but containing poisonous As, use is restricted; LiBF
6chemistry and thermal stability is bad and conductance is not high, LiOSO
2cF
3conduction rate variance and have corrosiveness to electrode, less use; Although LiPF
6decomposition reaction can occur, but have higher ionic conductivity, therefore, current lithium ion battery is use LiPF substantially
6.At present, the electrolyte major part of commercial li-ion used in battery adopts LiPF
6eC
2dMC, it has higher ionic conductivity and good electrochemical stability.
The topmost function of battery diaphragm 4 is the conducting of electronic isolation ion, namely stop positive and negative electrode in the battery electronics directly contact, but ion can freely pass through again.For diaphragm for lithium ion battery 4, basic demand is as following table 2:
Table 2:
Technological process of the present invention is described in detail below in conjunction with accompanying drawing 2:
Positive mix: mainly comprise binding agent (PVDF), conductive agent, (be generally cobalt acid lithium, LiMn2O4, nickle cobalt lithium manganate, LiFePO4, that this patent relates to is spinel-type high voltage nickel-manganese binary positive pole 1 material nickel ion doped (LiNi to the main material of positive pole 1
0.5mn
1.5o
4).Relevant powder formula in mass ratio weighs.
Powder toasts: be generally carry out baking removing moisture by convection oven equipment, PVDF baking temperature is 110 degree, and other baking temperatures are 150 degree, and general baking time is 6 hours.
Negative pole powder: mainly comprise binding agent CMC (solid powder)+SBR(liquid), conductive agent and negative pole 2 main material titanium oxide lithium
Batching:
Positive pole 1 is generally that these powders are added organic solvent NMP, is stirred, be uniformly dispersed by double-planet mixing apparatus, this patent adopt equipment be ultrasonic agitation equipment comparatively conventional equipment, dispersion evenly.
Negative pole 2 is generally ionized water of being added up by negative pole powder, is stirred, be uniformly dispersed by double-planet mixing apparatus.
Sieve: sieved by screen cloth by the liquid stirred, main purpose is to remove relevant particles thing.
Anode and cathode slurry sieves respectively.
Coating: be, by coating apparatus, the uniform liquid after sieving is applied to collector by associated specifications, positive pole 1 liquid slurry through stirring is coated in aluminum foil current collector, negative pole liquid slurry through stirring is coated in copper foil current collector, two sides all coating sizing-agents of collector, and require that two sides surface density is consistent.
Pole volume baking:
Roll up pole through being coated with the large volume wound, pole volume baking is toasted by vacuum drying oven equipment, and positive pole pole volume baking object is that negative pole is except anhydrating, and Flue curing parameter is, temperature 110 degree, baking time 12 hours except desolventizing NMP.Operating procedure in embodiment is the large-area positive collector of making one, then this large-area positive collector is carried out compressing tablet, the cutting of following steps, finally becomes the plus plate current-collecting body of small pieces; Negative current collector is with the manufacturing process of plus plate current-collecting body.The object done like this is the operation being convenient to technique, and the aluminium sheet or copper coin of sheet are convenient to the operations such as coating.
Compressing tablet:
Baked pole volume is carried out compressing tablet through continuous calendar press, and object allows powder and collector combine more fully, strengthens adhesion, reduce polarization resistance.
Cut small pieces:
The small pieces by technique related request, the positive pole 1 and negative pole 2 that press sheet being cut into respectively relative widths and length.
Tab welding
Mainly be welded on aluminium foil by anode ear, negative pole lug welding is on Copper Foil, and lug is equivalent to pole.
Lug rubberizing
The lug mainly will welded, live with adhesive tape note, object prevents pad from piercing through barrier film 4.
Weigh:
Object is that positive/negative plate is carried out coupling of weighing, because technological requirement positive pole weight and negative pole weight-matched, requires coupling by a certain percentage of the weight.
Brushing piece dedusting:
Brush away the dust on surface with sponge, then inhale dust with dust catcher.
Winding:
Being rolled by positive/negative plate by sutomatic winding machine or stack up, centre barrier film 4 separates.Require that negative pole necessarily embraces positive pole 1, barrier film 4 necessarily separates both positive and negative polarity simultaneously.
Core dust suction:
With dust catcher by the core dust suction after winding, mainly suck relevant dust.
Short-circuit detecting:
With short-circuit test, detect between positive plate and negative plate whether have short circuit, short circuit is then defective.
Enter shell:
By qualified after testing for the core spooled, be then put into inside box hat, add a lower insulation spacer bottom box hat, top adds a upper insulation spacer, prevents short circuit.
The point end:
That negative electrode lug (nickel lug) is welded to bottom box hat, by energy storage welding robot.
Slot rolling:
Mainly roll out a ditch out on box hat top, for the ease of machinery sealing below.
Core is toasted
Core is put into positive empty baking oven and carry out vacuum bakeout, main purpose removing moisture, baking temperature 80 degree, 12 hours time.
Fluid injection:
Baked core fluid injection machine carries out fluid injection, and liquid is exactly electrolyte.
Point block:
Be welded on block by anode ear (aluminium pole ears), block is positive pole 1 explosion-protection equipment above, is also convenient to contact with box hat to be formed seal simultaneously.
Sealing:
Block and box hat top are sealed by closing machine.
Cleaning rust-proof:
With alcohol with regard to the removing of box hat surface electrolyte, then add antirust oil.
Aging:
Exactly battery is put into a place to shelve, has normal temperature shelf and high temperature to shelve.Main purpose is convenient to electrolyte and is uniformly dispersed.
Change into:
Be charge to battery with small area analysis, object is Activation Activity material.
Voltage detecting:
The battery changed into is detected, screens mainly through voltage.
Shelve sleeve pipe:
Mainly at a kind of insulating material of battery surface pyrocondensation, be generally pvc or PET material
Partial volume:
Discharge and recharge is carried out to battery, is generally detect battery capacity size, is convenient to classification.
Classification is put in storage:
Be generally by measure, voltage, internal resistance, associated ratings carry out sorting and warehouse-in.
Whole technological process makes complete.
Operation principle
During this novel 3V rechargeable lithium ion batteries charging:
Positive pole reacts: LiNixMnyO
2 nixMnyO
2+ Li
++ e
-
Negative reaction: Li
4ti
5o
12+ 3Li
++ 3e
- li
7ti
5o
12
Above-mentioned reversible reaction is there is during electric discharge.
Claims (3)
1. a 3V lithium ion battery for novel discharge and recharge capable of circulation, is characterized in that: comprise positive pole that operating voltage is 4.5V-4.7V, negative pole that operating voltage is 1.55V, electrolyte or polymer dielectric, barrier film and rigidity shell; Positive pole and negative pole centre arrange barrier film and separate, and positive pole, barrier film and negative pole are rolled into core, and core is located at rigidity enclosure;
Described positive pole comprises plus plate current-collecting body, positive electrode active material layer and positive wire, positive electrode active material layer is coated on plus plate current-collecting body, plus plate current-collecting body connects block by positive wire, and positive electrode active material layer is made up of positive active material, anode activated charcoal, positive conductive agent and positive electrode binder; Positive active material adopts spinel-type high voltage nickel-manganese binary positive material nickel ion doped LiNi
0.5mn
1.5o
4, positive electrode binder adopts the mixture of Kynoar and butadiene-styrene rubber, and positive conductive agent adopts the mixture of acetylene black and Ketjen black carbon fiber;
Described negative pole comprises negative current collector, negative electrode active material layer and negative wire, negative electrode active material layer is coated on negative current collector, negative current collector connects rigidity shell by negative wire, and negative electrode active material layer is made up of negative electrode active material, cathode conductive agent and negative electrode binder; Described negative electrode active material adopts titanium oxide lithium, and cathode conductive agent adopts the mixture of acetylene black and Ketjen black carbon fiber, and negative electrode binder adopts the mixture of CMC.SBR, butadiene-styrene rubber, epoxy resin and nylon;
Described electrolyte solute adopts LiPF
6, solvent is the mixing material electrolyte of propene carbonate, ethylene carbonate and dimethyl carbonate;
Described barrier film adopts the thin film of polyphosphazene polymer second of Porous.
2. the 3V lithium ion battery of novel discharge and recharge capable of circulation according to claim 1, is characterized in that: described plus plate current-collecting body adopts Al, and negative current collector adopts Cu.
3. the manufacturing process of the 3V lithium ion battery of novel discharge and recharge capable of circulation according to claim 2, is characterized in that: comprise the following steps:
Steps A: positive pole material layer and negative material layer material requested are prepared burden
Powder needed for positive electrode material layer is weighed according to following mass ratio formula: positive active material 94.93%, anode activated charcoal 0.32%, positive conductive agent 2.85% and positive electrode binder 1.90%;
Powder needed for negative material layer is weighed according to following mass ratio formula: negative electrode active material 92%, cathode conductive agent 2.5% and negative electrode binder 5.5%;
Step B: baking, dewaters, makes slurry
Each powder in steps A is toasted respectively, removing moisture; Again the powder needed for positive electrode material layer is mixed with organic solvent NMP, together put into double-planet mixing apparatus and carry out uniform stirring, be mixed into anode sizing agent; By the powder needed for negative material layer and deionized water, together put into double-planet mixing apparatus and carry out uniform stirring, be mixed into cathode size, batching completes;
Step C: process of sieving
The anode sizing agent obtained in steps A and cathode size are carried out respectively by screen cloth process of sieving, removing particle;
Step D: coating process
By liquid anode sizing agent excessively sieved in step B or cathode size, correspondence is uniformly coated on plus plate current-collecting body or negative current collector, plus plate current-collecting body and the equal two sided coatings of negative current collector, and two sides consistent in density;
Step e: again toast
Coated plus plate current-collecting body and negative current collector are put into vacuum oven baking, Flue curing parameter is: temperature 110 °, baking time 12h, and baking object is the organic solvent NMP on removing plus plate current-collecting body, the deionized water on removing negative current collector;
Step F: tab welding
By welding anode ear corresponding on the plus plate current-collecting body after coating in step C or negative current collector or negative electrode lug, anode ear is positive wire, and negative electrode lug is negative wire;
Step G: by the product rubberizing in step D, dedusting;
Step H: winding
Positive pole and negative pole being rolled by sutomatic winding machine or stack up, positive pole and negative pole centre barrier film separate, and form core;
Step I: enter shell
The core spooled is put into rigidity housings, and rigidity outer casing bottom adds a lower insulation spacer, and top adds a upper insulation spacer, prevents short circuit;
Step J: the some end
By energy storage welding robot by negative pole lug welding to rigidity outer casing bottom;
Step K: core is toasted
The vacuum drying oven core spooled being placed on temperature 80 ° carries out vacuum bakeout, baking time 12 hours, removing moisture;
Step L: fluid injection
Carry out fluid injection with fluid injection machine to the complete battery core of baking, liquid is exactly electrolyte;
Step M: some block
Be welded to by anode ear on block, block is an explosion-protection equipment above positive pole, seals with rigidity housing contacts;
Step N: sealing
Block and rigidity shell upper are sealed by closing machine, completes.
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| CN201510336258.3A CN104979550A (en) | 2015-06-17 | 2015-06-17 | Novel 3V lithium ion battery capable of cyclically charging and discharging and manufacturing process of novel 3V lithium ion battery |
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| CN201510336258.3A CN104979550A (en) | 2015-06-17 | 2015-06-17 | Novel 3V lithium ion battery capable of cyclically charging and discharging and manufacturing process of novel 3V lithium ion battery |
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| CN112201788A (en) * | 2020-09-23 | 2021-01-08 | 深圳大学 | Lithium ion battery negative plate with high-capacity negative electrode bonding system and battery |
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Application publication date: 20151014 |