CN102035025A - Aging method of cylindrical lithium ion batteries - Google Patents
Aging method of cylindrical lithium ion batteries Download PDFInfo
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- CN102035025A CN102035025A CN2010102671549A CN201010267154A CN102035025A CN 102035025 A CN102035025 A CN 102035025A CN 2010102671549 A CN2010102671549 A CN 2010102671549A CN 201010267154 A CN201010267154 A CN 201010267154A CN 102035025 A CN102035025 A CN 102035025A
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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
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Abstract
The invention relates to an aging method of cylindrical lithium ion batteries, which comprises the following steps: charging a battery cell to increase the voltage to that of an initial battery cell; and placing the battery cell in an environment with the preset aging temperature. By adopting the high temperature aging method, the regenerative process of forming a solid electrolyte interface (SEI) is promoted more effectively to form a more even and stable SEI film, and a battery cell the interior microcircuit of which has low voltage can be better picked out. Compared with the existing methods, the aging time is shorter, the temperature is higher, and compared with the normal battery cells, the voltage of the battery cell with interior micro short circuit is more obvious, so that the battery cell with low voltage can be picked out more easily, thereby shortening the period, saving the energy source and increasing the economic benefits.
Description
Technical field
The present invention relates to the aging method of battery, more particularly, the invention relates to a kind of aging method of cylindrical lithium ion battery.
Technical background
Along with science and technology and the function of economic development market electronic product from strength to strength, and the shape molded dimension require more and more littler, the weight requirement is more and more lighter.Lithium ion battery because have height ratio capacity, high working voltage, non-environmental-pollution, have extended cycle life, advantage such as operating temperature range is wide, be widely used in moving in the electronic products such as manual phone, notebook computer, digital camera, even the lithium ion battery that has is applied on the automobile.
Lithium ion battery is to be positive electrode active materials with cobalt acid lithium, lithium nickel oxide, nickel-cobalt-manganese ternary material, lithium manganese oxide, LiFePO 4, phosphoric acid vanadium lithium etc., with lithium metal, lithium alloy, material with carbon element, lithium titanate etc. is negative active core-shell material, its electrolyte is to use organic liquid electrolyte or solid gel electrolyte, lithium ion battery is based on the organic nonaqueous solution electrolysis liquid of liquid state at present, as EC ethylene carbonate and DMC dimethyl carbonate mixture is solvent, with LiPF
6Be solute, and add a small amount of additive and form that additive can the electrolyte conductive capability, also has the over-charge protective ability.
The technological process of production of lithium battery generally has the following steps: both positive and negative polarity batching → both positive and negative polarity coating → both positive and negative polarity roll-in → both positive and negative polarity cutting → volume core → electric core assembling → laser welding → electric core baking → fluid injection → precharge → aging → partial volume detection → packing shipment.The voltage of the main purpose stable electrical core of aging step is wherein conveniently chosen low-voltage electricity core.Because through after changing into, the SEI film that negative terminal surface forms also is not very stable, need the process of a regeneration, at high temperature further promote the stable generation of SEI, and form a stabilized uniform SEI.In aging this process, low-voltage electricity core micro-short circuit occurs in inside once in a while, has the potential hazard of blast, in case the consequence that comes into the market is hardly imaginable.In ageing process, there is the electric core voltage decline meeting of micro-short circuit inside than comparatively fast, checks to have the electric core of micro-short circuit to pick out these inside easily after aging the finishing.Aging method is arranged now: normally electric core is charged to about 3.5V, under 33 ℃ of environment, placed 7 days then.Adopt this aging method that electric core is worn out, the voltage decline that exists electric core is not obvious, and the electric core of low-voltage is not easy to pick out, and is unfavorable for controlling potential certain dangerous electric core and comes into the market.
Summary of the invention
The aging method that the purpose of this invention is to provide a kind of cylindrical lithium ion battery, this method that make the electric core voltage of inner micro-short circuit descend more obvious effectively, help the easier electric core of picking out low-voltage, thereby avoid the battery of inner micro-short circuit to produce the danger of exploding.
For achieving the above object, the present invention is achieved in that
A kind of aging method of cylindrical lithium ion battery, this method comprises the steps:
Charge step is given electric core charging, makes the voltage 3.60-3.70V of its voltage promotion to initial electric core;
Place step, electric core is placed under the predefined aging temperature environment placed.
Why selecting initial voltage is 3.60-3.70V, and the characteristic place of this cylindrical lithium ion wherein when voltage＞3.70V, surpasses the safe current potential of electric core, phenomenon occurs overcharging, heavy damage electricity in-core bilge construction.As voltage＜3.60V, during brownout, electric core descends not obvious at short notice, needs long ageing time, is unfavorable for selecting the electric core of low-voltage, and is seriously out of control to quality control.As mentioned above, the voltage of initial electric core is preferably 3.65-3.70V, and the best is 3.65V.
As mentioned above 2-7 days standing time, be preferably 3-4 days, the best is 3 days.2-7 days standing time, in 2 days standing times, electric core aging is incomplete, and the voltage of inner micro-short circuit electricity core descends not obvious, can not pick out, and has certain potential safety hazard; During 7 days standing times, electric core is fully aging, the electric core of inner micro-short circuit is had clearly improvement, but ageing time is long, and the production cycle will increase, and increase the storage area, increase cost, cause economic benefit obviously to descend.
Aging temperature 40-60 ℃ as mentioned above, be preferably 45 ℃.Aging temperature is set 40-60 ℃, and temperature is crossed when hanging down, and is not exclusively aging, and electric core voltage descends not obvious, can not select the electric core of low-voltage equally well; And too high when temperature, it is aging that battery is accelerated, and damages the structure of electric in-core portion easily.
Adopt above-mentioned high temperature ageing method, more effectively promote to change into the regenerative process of SEI, form a more uniform and stable SEI film, and can better advance to select the electric core of inner little road low-voltage, comparing ageing time with habitual aging method will lack, it is high that temperature is wanted, and compares with the normal electrical core, and the voltage of inner micro-short circuit electricity core is more obvious, thereby the also easier low-voltage electricity core of selecting, also shortened the cycle greatly, energy savings increases economic interests.
Embodiment
Below by embodiment concrete enforcement of the present invention is described in detail.
1, the preparation of battery
(1) Zheng Ji preparation
With 143 kilograms of anodal active component LiFePO
4, 6.4 kilograms of conductive agent SP, 9.55 kilograms of binding agent polyvinylidene fluoride PVDF, 262 kilograms of N-methyl pyrrolidones mix, in de-airing mixer, stir then and form uniform anode sizing agent.
This slurry is evenly coated on the 18um aluminium foil, makes the positive pole that is of a size of 1540 * 55mm * 0.167mm in 120 ℃ of oven dry, roll-in, itemize cutting then, wherein contain 26.4 gram active component LiFePO4.
(2) preparation of negative pole
53.2 kilograms of active component native graphites, 1.48 kilograms of acetylene blacks, 1.77 kilograms of conductive agent SP, 2.65 kilograms of binding agent polyvinylidene fluoride PVDF, 64.5 kilograms of N-N-methyl 2-pyrrolidone N-s, 0.04 gram additive oxalic acid are mixed, in de-airing mixer, stir then and form uniform cathode size.
This slurry is evenly coated on the 10um Copper Foil, makes the negative pole that is of a size of 1576 * 57 * 0.82mm in 110 ℃ of oven dry, roll-in, itemize cutting then, wherein contain 9.9 gram active component native graphites.
(3) preparation of electrolyte
LiPF6 is dissolved in EC/DMC=1 by the concentration of 1 mol: form nonaqueous electrolytic solution in 1 the mixed solvent.
(4) assembling of battery
The above-mentioned positive pole that makes, negative pole are formed the electric core of a cylindrical lithium ion with three layers of diaphragm papers coiling of 20um polypropylene, polyethylene/polypropylene, this electricity core is packed in the box hat of specification 26 series, after welding, baking, cooling, in gloves, in the dehumidifying nitrogen environment, manually inject above-mentioned electrolyte 20.5 gram battery steel shells, make battery at vacuum seal, at room temperature left standstill 24 hours, to reach the purpose that electrolyte fully soaks into the active material in the electric core, make the SEI film that forms in the formation process even, stable, prepare subsequently to change into.
Embodiment 1
The voltage 3.60V of initial electric core during aging the beginning, 50 ℃ of aging temperatures, ageing time is 4 days.
Appointing and to get above method and make the column type box hat lithium-ion electric core that 300 in electric core does not change into, is 3.60V with electric core pre-charge pressure, more electric core is placed high hot house, 50 ℃ of ambient temperatures are set, ageing time detected voltage after 4 days, and the electric core that detects low-voltage has 9, and lower voltage rate is 3.0%.
Embodiment 2
The voltage 3.70V of initial electric core during aging the beginning, 40 ℃ of aging temperatures, ageing time is 3 days.
Appointing and to get above method and make the column type box hat lithium-ion electric core that 300 in electric core does not change into, is 3.70V with electric core pre-charge pressure, more electric core is placed high hot house, 40 ℃ of ambient temperatures are set, ageing time detected voltage after 3 days, and the electric core that detects low-voltage has 9, and lower voltage rate is 3.0%.
Embodiment 3
The voltage 3.65V of initial electric core during aging the beginning, 45 ℃ of aging temperatures, ageing time is 3 days.
Appointing and to get above method and make the column type box hat lithium-ion electric core that 300 in electric core does not change into, is 3.65V with electric core pre-charge pressure, more electric core is placed high hot house, 45 ℃ of ambient temperatures are set, ageing time detected voltage after 3 days, and the electric core that detects low-voltage has 9, and lower voltage rate is 3.0%.
Comparison example 1
Appointing and to get above method and make the column type box hat lithium-ion electric core that 300 in electric core does not change into, is 3.35V with electric core pre-charge pressure, more electric core is placed high hot house, 33 ℃ of ambient temperatures are set, ageing time detected voltage after 7 days, and the electric core that detects low-voltage has 5, and lower voltage rate is 1.6%.
Comparison example 2
Appointing and to get above method and make the column type box hat lithium-ion electric core that 300 in electric core does not change into, is 3.30V with electric core pre-charge pressure, more electric core is placed high hot house, 33 ℃ of ambient temperatures are set, ageing time detected voltage after 7 days, and the electric core that detects low electric core has 4, and lower voltage rate is 1.3%.
Comparison example 3
Appointing and to get above method and make the column type box hat lithium-ion electric core that 300 in electric core does not change into, is 3.50V with electric core pre-charge pressure, more electric core is placed high hot house, 33 ℃ of ambient temperatures are set, ageing time detected voltage after 7 days, and the electric core that detects low-voltage has 6, and lower voltage rate is 2.0%.
Be not difficult to find out by above example, after by the present invention cylindrical lithium ion battery being carried out burin-in process, lower voltage rate is generally about 3.0%, and after adopting Comparative Examples (promptly habitual aging method) that lithium ion is carried out burin-in process, lower voltage rate is generally below 2.0%.The battery that comparison example and the present invention adopt is that Same Way makes with a collection of battery, lower voltage rate should be identical, behind different aging methods, the obviously low aging method of the present invention of the lower voltage rate of the aging method of comparison example, adopt the aging method of comparison example, be unfavorable for selecting low-voltage electricity core, come into the market and to cause very big potential safety hazard, adopt high temperature ageing method of the present invention can avoid this potential safety hazard effectively.
Claims (6)
1. the aging method of a cylindrical lithium ion battery is characterized in that this method mainly comprises the steps:
Charge step is given electric core charging, makes the voltage of its voltage promotion to initial electric core, and initial electric core voltage is 3.60-3.70V;
Place step, electric core is placed under the predefined aging temperature environment placed.
2. the aging method of a kind of cylindrical lithium ion battery as claimed in claim 1 is characterized in that: place in the step, be 2-7 days standing time.
3. the aging method of a kind of cylindrical lithium ion battery as claimed in claim 1 or 2 is characterized in that: place in the step, be 3-4 days standing time.
4. the aging method of a kind of cylindrical lithium ion battery as claimed in claim 1 or 2 is characterized in that described aging temperature is 40-60 ℃.
5. the aging method of a kind of cylindrical lithium ion battery as claimed in claim 1, it is characterized in that: the aging temperature of this placement is 45 ℃.
6. the aging method of a kind of cylindrical lithium ion battery as claimed in claim 1, it is characterized in that: this initial electric core voltage is 3.65V.
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| CN2010102671549A CN102035025A (en) | 2010-08-23 | 2010-08-23 | Aging method of cylindrical lithium ion batteries |
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| CN2010102671549A CN102035025A (en) | 2010-08-23 | 2010-08-23 | Aging method of cylindrical lithium ion batteries |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646852A (en) * | 2012-04-01 | 2012-08-22 | 广州丰江电池新技术股份有限公司 | Lithium ion battery aging method |
| CN102728564A (en) * | 2012-07-02 | 2012-10-17 | 四川长虹电源有限责任公司 | Screening method of lithium cobaltate monomer batteries |
| CN103354299A (en) * | 2013-07-03 | 2013-10-16 | 江西省福斯特新能源有限公司 | High temperature ageing treatment method for lithium ion battery |
| CN103682494A (en) * | 2012-09-26 | 2014-03-26 | 中山天贸电池有限公司 | Formation and pre-charging charging method for lithium ion secondary battery |
| CN107851850A (en) * | 2015-07-01 | 2018-03-27 | Nec能源元器件株式会社 | The method for manufacturing the method for lithium rechargeable battery and assessing lithium rechargeable battery |
| CN109417191A (en) * | 2017-02-22 | 2019-03-01 | 丰田自动车欧洲公司 | Lithium-ions battery high temperature ageing process |
| CN110600810A (en) * | 2019-08-15 | 2019-12-20 | 安徽五行动力新能源有限公司 | Lithium battery processing technology |
| CN112820964A (en) * | 2021-01-25 | 2021-05-18 | 江西安驰新能源科技有限公司 | Aging and capacity grading method for lithium ion battery |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646852A (en) * | 2012-04-01 | 2012-08-22 | 广州丰江电池新技术股份有限公司 | Lithium ion battery aging method |
| CN102728564A (en) * | 2012-07-02 | 2012-10-17 | 四川长虹电源有限责任公司 | Screening method of lithium cobaltate monomer batteries |
| CN103682494A (en) * | 2012-09-26 | 2014-03-26 | 中山天贸电池有限公司 | Formation and pre-charging charging method for lithium ion secondary battery |
| CN103354299A (en) * | 2013-07-03 | 2013-10-16 | 江西省福斯特新能源有限公司 | High temperature ageing treatment method for lithium ion battery |
| CN103354299B (en) * | 2013-07-03 | 2015-12-23 | 江西省福斯特新能源有限公司 | A kind of high temperature ageing processing method of lithium ion battery |
| CN107851850A (en) * | 2015-07-01 | 2018-03-27 | Nec能源元器件株式会社 | The method for manufacturing the method for lithium rechargeable battery and assessing lithium rechargeable battery |
| US11355783B2 (en) | 2015-07-01 | 2022-06-07 | Envision Aesc Japan Ltd. | Method of manufacturing a lithium-ion secondary battery |
| US11870038B2 (en) | 2015-07-01 | 2024-01-09 | Aesc Japan Ltd. | Method of manufacturing a lithium-ion secondary battery |
| CN109417191A (en) * | 2017-02-22 | 2019-03-01 | 丰田自动车欧洲公司 | Lithium-ions battery high temperature ageing process |
| CN110600810A (en) * | 2019-08-15 | 2019-12-20 | 安徽五行动力新能源有限公司 | Lithium battery processing technology |
| CN112820964A (en) * | 2021-01-25 | 2021-05-18 | 江西安驰新能源科技有限公司 | Aging and capacity grading method for lithium ion battery |
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Application publication date: 20110427 |