CN103022552A - Long-life lithium ion battery used under shallow charging and discharging conditions and preparation method of same - Google Patents
Long-life lithium ion battery used under shallow charging and discharging conditions and preparation method of same Download PDFInfo
- Publication number
- CN103022552A CN103022552A CN201210557983XA CN201210557983A CN103022552A CN 103022552 A CN103022552 A CN 103022552A CN 201210557983X A CN201210557983X A CN 201210557983XA CN 201210557983 A CN201210557983 A CN 201210557983A CN 103022552 A CN103022552 A CN 103022552A
- Authority
- CN
- China
- Prior art keywords
- positive
- lithium
- kinds
- preparation
- active material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000002360 preparation method Methods 0.000 title claims abstract description 43
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 37
- 238000007599 discharging Methods 0.000 title abstract description 3
- 239000007774 positive electrode material Substances 0.000 claims abstract description 53
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 17
- SBWRUMICILYTAT-UHFFFAOYSA-K lithium;cobalt(2+);phosphate Chemical compound [Li+].[Co+2].[O-]P([O-])([O-])=O SBWRUMICILYTAT-UHFFFAOYSA-K 0.000 claims abstract description 8
- ILXAVRFGLBYNEJ-UHFFFAOYSA-K lithium;manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[O-]P([O-])([O-])=O ILXAVRFGLBYNEJ-UHFFFAOYSA-K 0.000 claims abstract description 8
- 239000006258 conductive agent Substances 0.000 claims description 25
- 239000002002 slurry Substances 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 22
- 230000001070 adhesive effect Effects 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 18
- 239000011230 binding agent Substances 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 12
- 229910010707 LiFePO 4 Inorganic materials 0.000 claims description 11
- 239000002253 acid Substances 0.000 claims description 11
- 229910017052 cobalt Inorganic materials 0.000 claims description 10
- 239000010941 cobalt Substances 0.000 claims description 10
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 10
- 239000003792 electrolyte Substances 0.000 claims description 9
- 238000003475 lamination Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 238000004062 sedimentation Methods 0.000 claims description 9
- 238000005538 encapsulation Methods 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 8
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims description 7
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical group CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 7
- ZVKRVGZVXQYLPZ-UHFFFAOYSA-N [Li].[V].P(O)(O)(O)=O Chemical compound [Li].[V].P(O)(O)(O)=O ZVKRVGZVXQYLPZ-UHFFFAOYSA-N 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 abstract description 13
- 239000002131 composite material Substances 0.000 abstract description 6
- 238000011217 control strategy Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- HRHXUSNFHBTSMG-UHFFFAOYSA-J P(=O)([O-])([O-])[O-].[Fe+2].[Li+].[Mn](=O)(=O)([O-])O.[Li+] Chemical compound P(=O)([O-])([O-])[O-].[Fe+2].[Li+].[Mn](=O)(=O)([O-])O.[Li+] HRHXUSNFHBTSMG-UHFFFAOYSA-J 0.000 abstract 1
- YWJVFBOUPMWANA-UHFFFAOYSA-H [Li+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O Chemical compound [Li+].[V+5].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O YWJVFBOUPMWANA-UHFFFAOYSA-H 0.000 abstract 1
- 238000009831 deintercalation Methods 0.000 abstract 1
- -1 housing Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910000314 transition metal oxide Inorganic materials 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000010405 anode material Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000002033 PVDF binder Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 241000446313 Lamella Species 0.000 description 1
- 229910013188 LiBOB Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000002041 carbon nanotube Substances 0.000 description 1
- 229910021393 carbon nanotube Inorganic materials 0.000 description 1
- 229920006184 cellulose methylcellulose Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- CKFRRHLHAJZIIN-UHFFFAOYSA-N cobalt lithium Chemical compound [Li].[Co] CKFRRHLHAJZIIN-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000013538 functional additive Substances 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000009781 safety test method Methods 0.000 description 1
- 239000011257 shell material Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011366 tin-based material Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
-
- 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 invention relates to a long-life lithium ion battery used under shallow charging and discharging conditions and a preparation method of the long-life lithium ion battery, belonging to the technical field of lithium ion batteries. A positive active material of the long-life lithium ion battery comprises any two or three of lithium cobaltate, lithium manganate lithium iron phosphate, lithium vanadium phosphate, lithium manganese phosphate and lithium cobalt phosphate; the working voltage difference between every two positive electrode materials in the two or three positive electrode materials is controlled to be not smaller than 0.1 V; and in the two or three positive electrode materials, weight percentages of all the positive electrode materials in the positive active material are not smaller than 30%. Through introduction of a composite positive plate, the existing control strategy is adapted from the deintercalation lithium peak potential of the material and the working life of a system is further prolonged.
Description
Technical field
The present invention relates to a kind of lithium ion battery and preparation method thereof, more particularly, the present invention relates to a kind ofly for the shallow extended-life lithium ion battery under the condition and preparation method thereof that charges and discharge, belong to technical field of lithium ion.
Background technology
At present, commonly on the market shallowly put that (as: charging interval of each orbital period is 60 minutes to chemical power source usually on the typical LEO satellite under the condition shallow filling, be 30 minutes discharge time, long-term depth of discharge is 20%) positive active material of the lithium ion battery of work all is to adopt pure transition metal oxide, but there is certain problem in this class material.Although as having the advantages such as high-energy-density and easy preparation as anodal lithium ion battery take pure cobalt acid lithium or nickel cobalt binary material, have the short problem of poor stability and working life.
Common way is that many grades of end of charge voltage are set in power-supply controller of electric under this type of service condition, in power-supply system work according to the attenuation automatic or manual of chemical power source step by step the lifting end of charge voltage to reach the purpose that prolongs the power-supply system working life.But adopt the method can only prolong to a certain extent working life; the working life of system still mainly is subject to used activated species, and the safety issue of pure transition metal oxide lithium ion battery under the protective circuit failure conditions also becomes increasingly conspicuous.
Prior art has also proposed some schemes:
It is 200810029727.7 that State Intellectual Property Office discloses an application number in 2010.1.27, name is called the patent of invention of " anode pole piece of secondary lithium battery and preparation method thereof ", it discloses a kind of anode pole piece of secondary lithium battery, at the two-sided at least two membranes lamella that is coated with respectively of collector, every layer constituent material or proportioning are different, fail safe with this anodal chargeable lithium ion battery for preparing is higher, but obviously, larger interface resistance can affect its electrical property and cycle performance between two-layer diaphragm.
Secondly, the scheme that adopts blended anode material to prepare electrokinetic cell has: it is 200910214499.5 that State Intellectual Property Office discloses an application number in 2011.7.6, name is called the patent of invention of " electrokinetic cell that uses blended anode material ", it is positive active material that this patent has adopted the composite material of LiFePO 4 and nickel-cobalt-manganese ternary material, although the battery with this active material preparation has better fail safe and cycle performance than the nickel-cobalt-manganese ternary material, yet, inevitably there was transition metal oxide in the positive pole of preparation on the pole piece surface after bi-material mixed, and electrolyte can more or less cause the dissolving of metal ion in the surface transition metal oxide to affect cycle performance, and also can cause certain potential safety hazard in the existence of the transition metal oxide of abuse condition lower surface poor heat stability.
Summary of the invention
The present invention is intended to solve existing battery and is not suitable for working long hours shallow charging and discharging under the condition, the problem that has potential safety hazard, provide a kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, can adapt to existing control strategy, alleviate simultaneously the problems such as fail safe that the pure transition metal oxide of present employing brings as anode material for lithium-ion batteries or blended anode material lithium ion battery is not good.
In order to realize the foregoing invention purpose, its concrete technical scheme is as follows:
A kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, it is characterized in that: described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
Preferably, the mass ratio of positive active material of the present invention, conductive agent and binding agent is 90-98:1-5:1-5.
Above-mentioned lithium ion battery, wherein, barrier film adopts lamination, barrier film bag or reels to consist of battery core between positive and negative electrode, and barrier film is microporous polyolefin film, non-woven membrane or composite membrane.
The shell material of above-mentioned lithium ion battery is stainless steel, aluminium alloy, plastics, aluminum-plastic composite membrane or titanium alloy.
The electrolyte of above-mentioned lithium ion battery is by electric conducting lithium salt such as LiPF
6, LiBOB or their mixture be dissolved in such as EC, PC, EMC, DMC or in the middle of them in any two kinds or the above mixed solvent, adds in case of necessity functional additive such as VC, FEC, biphenyl.
Described negative pole is online at Copper Foil, copper mesh, titanium foil or titanium by material with carbon element, silica-base material or the agent of tin-based material hybrid conductive, adhesive coated.
Further, conductive agent is the one or any multiple material mixing composition in conductive black, graphite, carbon fiber, the carbon nano-tube.
Described binding agent is comprised of the multiple of one or any ratio among PVDF, PTFE, CMC, the SBR.
A kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, it is characterized in that: described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
Preferably, solvent of the present invention is 1-METHYLPYRROLIDONE.
Preferably, adjustment viscosity of the present invention refers to adjust viscosity to 2500-6000mPas.
The useful technique effect that the present invention brings:
1, the shallow extended-life lithium ion battery that charges and discharge under the condition of the present invention is passed through the introducing of anode composite sheet, adapted to existing control strategy from the removal lithium embedded spike potential of material, further prolonged the working life of system, the differential capacity curve of every kind of selective positive electrode all has separately distinctive removal lithium embedded peak, by selecting simultaneously two kinds or three kinds of positive electrodes, the strategy that has adapted to existing end of charge voltage grading control at Mechanism of electrochemical behaviors of anhydrous, can provide than the existing longer working life of single positive electrode of using, can also reach simultaneously the purpose that improves fail safe, be highly suitable for the shallow use that charges and discharge under the condition;
2, to take full advantage of the property difference of every kind of positive electrode mainly be the difference of real density and the characteristic of slurry non-newtonian fluid to preparation method provided by the invention, operating process is simple, need not to carry out twice coating, and this preparation method can guarantee that several positive electrodes share identical conductive agent network, reduced the interface impedance between the different materials, preferred solvent and range of viscosities have further guaranteed not sedimentation of slurry.
Embodiment
Embodiment 1
A kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
Embodiment 2
A kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
Preferably, the mass ratio of described positive active material, conductive agent and binding agent is 90:1:1.
Embodiment 3
A kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
Preferably, the mass ratio of described positive active material, conductive agent and binding agent is 98:5:5.
Embodiment 4
A kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
Preferably, the mass ratio of described positive active material, conductive agent and binding agent is 94:3:3.
Embodiment 5
A kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
Preferably, the mass ratio of described positive active material, conductive agent and binding agent is 91:4:2.
Embodiment 6
A kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
Embodiment 7
A kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
Preferably:
Described solvent is 1-METHYLPYRROLIDONE.
Described adjustment viscosity refers to adjust viscosity to 2500mPas.
Embodiment 8
A kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
Preferably:
Described solvent is 1-METHYLPYRROLIDONE.
Described adjustment viscosity refers to adjust viscosity to 6000mPas.
Embodiment 9
A kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
Preferably:
Described solvent is 1-METHYLPYRROLIDONE.
Described adjustment viscosity refers to adjust viscosity to 4250mPas.
Embodiment 10
A kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
Preferably:
Described solvent is 1-METHYLPYRROLIDONE.
Described adjustment viscosity refers to adjust viscosity to 5500mPas.
Embodiment 11
The present invention is further illustrated below by embodiment:
The making flow process of battery of the present invention is as follows: the both positive and negative polarity batching, and---------the both positive and negative polarity roller is cut, and------------------vacuum liquid filling---wears out and---changes into---secondary sealing---sorting---finished product tab welding both positive and negative polarity lamination (coiling) grouping of both positive and negative polarity sieve in baking in encapsulation in the both positive and negative polarity coating in both positive and negative polarity slurrying
Anode formula:
Adopt positive active material content be 96wt%(wherein, the cobalt of the LiFePO 4 of operating voltage 3.4V and operating voltage 3.7V acid lithium mixes according to the ratio of weight ratio 6:4), conductive agent content is 1.7wt%, binding agent PVDF content is 2.3wt%;
Cathode formula:
Graphite 95.6wt%, conductive agent 1.0wt%, CMC1.2wt%, SBR2.0wt%.
Anodal slurrying:
Taking by weighing at first in proportion binding agent PVDF is dissolved among the solvent NMP, the fully rear solution that forms of stirring and dissolving, the positive electrode material LiFePO 4 of lithium that adds conductive agent and low real density to mentioned solution, stir, adjusting viscosity adds the positive pole material of lithium cobalt acid of higher real density again to not sedimentation of slurry, stir, it is on 12 microns the collector aluminium foil that the slurry that stirs is coated on thickness, the evaporation desolventizing, and roll-in obtains the anode composite pole piece.
Barrier film uses 20 microns monolayer polyethylene barrier films, and battery adopts laminated structure, and battery case is stainless steel.
Comparative Examples 1: positive active material is pure cobalt acid lithium, prepares battery according to same flow process;
Comparative Examples 2: positive active material is LiFePO 4, prepares battery according to same flow process.
The battery of above-described embodiment and Comparative Examples preparation carries out capacity check and safety testing, and its result of the test is as shown in the table.
See that from upper table the battery that adopts the present invention's preparation has good cycle performance and well fail safe.
Claims (5)
1. one kind is used for the shallow extended-life lithium ion battery that charges and discharge under the condition, comprise barrier film, housing, electrolyte, negative pole and positive pole, described positive pole is by positive active material, conductive agent and adhesive coated form at plus plate current-collecting body, it is characterized in that: described positive active material is cobalt acid lithium, LiMn2O4, LiFePO 4, phosphoric acid vanadium lithium, any two kinds or three kinds of compositions in lithium manganese phosphate and the cobalt phosphate lithium, control the poor 0.1V of being not less than of operating voltage between per two kinds of positive electrodes in described two kinds or the three kinds of positive electrodes, in described two kinds or the three kinds of positive electrodes, the percentage by weight that every kind of positive electrode accounts for positive active material all is not less than 30%.
2. according to claim 1 a kind of for the shallow extended-life lithium ion battery that charges and discharge under the condition, it is characterized in that: the mass ratio of described positive active material, conductive agent and binding agent is 90-98:1-5:1-5.
3. according to claim 1 a kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, comprise that preparation is anodal, preparation negative pole, both positive and negative polarity roller are cut, the grouping of both positive and negative polarity sieve, both positive and negative polarity lamination or coiling, tab welding, encapsulation, baking, vacuum liquid filling, wear out, change into, secondary sealing, sorting and finished product, it is characterized in that: described preparation positive pole comprises following processing step: at first get binding agent and be dissolved in the solvent, the fully rear adhesive solution that forms of stirring and dissolving; In adhesive solution, add conductive agent and positive electrode; Add first the minimum positive electrode of real density, adjust viscosity, make not sedimentation of slurry, add successively from low to high other positive electrode according to real density again, stirring obtains the positive active material slurry; The positive active material slurry is coated on the plus plate current-collecting body, and the evaporation desolventizing obtains positive plate.
4. according to claim 1 a kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, it is characterized in that: described solvent is 1-METHYLPYRROLIDONE.
5. according to claim 1 a kind of for the shallow preparation method who charges and discharge the extended-life lithium ion battery under the condition, it is characterized in that: described adjustment viscosity refers to adjust viscosity to 2500-6000mPas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210557983.XA CN103022552B (en) | 2012-12-20 | 2012-12-20 | A kind of for extended-life lithium ion battery under shallow charge and discharge condition and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210557983.XA CN103022552B (en) | 2012-12-20 | 2012-12-20 | A kind of for extended-life lithium ion battery under shallow charge and discharge condition and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103022552A true CN103022552A (en) | 2013-04-03 |
| CN103022552B CN103022552B (en) | 2016-02-03 |
Family
ID=47970858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210557983.XA Active CN103022552B (en) | 2012-12-20 | 2012-12-20 | A kind of for extended-life lithium ion battery under shallow charge and discharge condition and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103022552B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749525A (en) * | 2013-12-31 | 2015-07-01 | 华为技术有限公司 | Battery aging state detection device, system and method |
| CN106410188A (en) * | 2016-12-06 | 2017-02-15 | 先进储能材料国家工程研究中心有限责任公司 | Lithium ion battery positive electrode slurry and preparation method thereof |
| CN108604679A (en) * | 2015-12-18 | 2018-09-28 | Saft公司 | Including the electrochemical cell of lithiumation titanate oxide negative electrode active material is used for the purposes of LEO application |
| CN112731174A (en) * | 2020-12-25 | 2021-04-30 | 惠州市豪鹏科技有限公司 | Method for evaluating full-charge and shallow-discharge performance of lithium battery positive electrode material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641912A (en) * | 2004-01-02 | 2005-07-20 | 深圳华粤宝电池有限公司 | Lithium ion cell anode, lithium cell using same and its manufacturing method |
| CN101202361A (en) * | 2007-04-24 | 2008-06-18 | 万向集团公司 | Lithium ion battery |
| CN101714629A (en) * | 2009-11-10 | 2010-05-26 | 苏州大学 | Tri-platform blended cathode material for lithium ion batteries and preparation method thereof |
-
2012
- 2012-12-20 CN CN201210557983.XA patent/CN103022552B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1641912A (en) * | 2004-01-02 | 2005-07-20 | 深圳华粤宝电池有限公司 | Lithium ion cell anode, lithium cell using same and its manufacturing method |
| CN101202361A (en) * | 2007-04-24 | 2008-06-18 | 万向集团公司 | Lithium ion battery |
| CN101714629A (en) * | 2009-11-10 | 2010-05-26 | 苏州大学 | Tri-platform blended cathode material for lithium ion batteries and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104749525A (en) * | 2013-12-31 | 2015-07-01 | 华为技术有限公司 | Battery aging state detection device, system and method |
| CN104749525B (en) * | 2013-12-31 | 2017-11-17 | 华为技术有限公司 | Battery aging status detection means, system, method |
| CN108604679A (en) * | 2015-12-18 | 2018-09-28 | Saft公司 | Including the electrochemical cell of lithiumation titanate oxide negative electrode active material is used for the purposes of LEO application |
| CN106410188A (en) * | 2016-12-06 | 2017-02-15 | 先进储能材料国家工程研究中心有限责任公司 | Lithium ion battery positive electrode slurry and preparation method thereof |
| CN112731174A (en) * | 2020-12-25 | 2021-04-30 | 惠州市豪鹏科技有限公司 | Method for evaluating full-charge and shallow-discharge performance of lithium battery positive electrode material |
| CN112731174B (en) * | 2020-12-25 | 2023-04-07 | 惠州市豪鹏科技有限公司 | Method for evaluating full-charge and shallow-discharge performance of lithium battery positive electrode material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103022552B (en) | 2016-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103746089B (en) | A kind of solid lithium battery with gradient-structure and preparation method thereof | |
| CN102916190B (en) | Water paste for battery electrode | |
| CN101931074B (en) | Film base material compositions for lithium battery electrodes and lithium battery | |
| US8753780B2 (en) | Electrode including barrier layer containing two conductive powders with different particle diameters and method for producing the same | |
| CN100452502C (en) | Non-aqueous solution lithium-ferrous disulfide primary cell | |
| CN101388449B (en) | Positive plate of high power lithium ionic cell and lithium ionic cell containing the same | |
| CN103107373B (en) | Battery | |
| CN104078708B (en) | Pre-doping agent, electrical storage device and its manufacture method using the pre-doping agent | |
| US11211635B2 (en) | Battery, battery pack, and uninterruptible power supply | |
| CN110268557A (en) | Use the prelithiation of lithium metal and inorganic composite layers | |
| WO2019200609A1 (en) | Incorporation of lithium-ion source material into an activated carbon electrode for a capacitor-assisted battery | |
| US10020511B2 (en) | Lithium secondary battery | |
| WO2020038011A1 (en) | Lithium ion battery and preparation method therefor, and electric vehicle | |
| CN102376939A (en) | Lithium-ion secondary battery and anode material thereof | |
| CN112289975A (en) | Low-temperature lithium ion battery | |
| CN102427123A (en) | Lithium ion secondary battery and anode sheet thereof | |
| JP5527597B2 (en) | Method for manufacturing lithium secondary battery | |
| CN103022552B (en) | A kind of for extended-life lithium ion battery under shallow charge and discharge condition and preparation method thereof | |
| CN112713266A (en) | Negative electrode slurry and application thereof | |
| CN104766971A (en) | Positive electrode material and aqueous battery containing positive electrode material | |
| CN102270762A (en) | Electrode slurry for lithium ion battery and electrode piece made with same | |
| CN112615111A (en) | High-liquid-retention self-repairing diaphragm, preparation method thereof and lithium ion battery | |
| CN104752681A (en) | Battery | |
| EP3574540A1 (en) | Battery paste and electrolye compositions and electrochemical cell for use therewith | |
| CN104716377A (en) | Alternating current charging and discharging cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180427 Address after: 610000 18 West core road, hi-tech West District, Chengdu, Sichuan Patentee after: Dongfang Electric Co., Ltd. Address before: 610036 Shu Han Road, Jinniu District, Chengdu, Sichuan Province, No. 333 Patentee before: Dongfang Electric Corporation |