CN103066329B - Lithium ion battery activation method - Google Patents
Lithium ion battery activation method Download PDFInfo
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- CN103066329B CN103066329B CN201110325883.XA CN201110325883A CN103066329B CN 103066329 B CN103066329 B CN 103066329B CN 201110325883 A CN201110325883 A CN 201110325883A CN 103066329 B CN103066329 B CN 103066329B
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- ion battery
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 48
- 230000004913 activation Effects 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 83
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000010277 constant-current charging Methods 0.000 claims abstract description 13
- 238000007600 charging Methods 0.000 claims abstract description 12
- 208000028659 discharge Diseases 0.000 claims description 32
- 238000010281 constant-current constant-voltage charging Methods 0.000 claims description 16
- 239000005955 Ferric phosphate Substances 0.000 claims description 15
- 229940032958 ferric phosphate Drugs 0.000 claims description 15
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 claims description 15
- 229910000399 iron(III) phosphate Inorganic materials 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 7
- 229910017052 cobalt Inorganic materials 0.000 claims description 7
- 239000010941 cobalt Substances 0.000 claims description 7
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 7
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract description 5
- 238000010280 constant potential charging Methods 0.000 abstract 6
- 238000009413 insulation Methods 0.000 description 22
- 210000004027 cell Anatomy 0.000 description 12
- 230000003213 activating effect Effects 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 239000010405 anode material Substances 0.000 description 3
- 239000011889 copper foil Substances 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000011888 foil Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 210000001787 dendrite Anatomy 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002224 dissection Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002641 lithium Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
Classifications
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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
-
- 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 discloses a lithium ion battery activation method, which comprises the following steps that: 1, in a constant current charging stage, a current range is 0.02 to 0.1 CA, and the charging time is 1.5 to 3 hours; 2, in a constant current and constant voltage charging stage, the constant current range is 0.1 to 0.3 CA, the constant current charging is stopped until a preset voltage is reached, and the subsequent constant voltage charging is stopped until the current is 0.01 to 0.05CA; 3, in a constant current discharging stage, a current range is 0.05 to 0.2 CA, and the discharging time is 1 to 4 hours; 4, in a constant current and constant voltage charging stage, the constant current is 0.05 to 0.2 CA, the constant current charging is stopped until the preset voltage is reached, and the subsequent constant voltage charging is stopped until the current is 0.01 to 0.05CA; 5, in the constant current discharging stage, the current range is 0.05 to 0.2 CA, and the discharging time is 1 to 4 hours; and 6, in the constant current and constant voltage charging stage, the constant current is 0.05 to 0.2CA, the constant current charging is stopped until the preset voltage is reached, and the subsequent constant voltage charging is stopped until the current is 0.01 to 0.05CA. By the lithium ion battery activation method, a phenomenon that lithium ions are separated after a lithium battery is activated can be avoided.
Description
[technical field]
The present invention relates to a kind of lithium ion battery activation method.
[background technology]
Lithium ion battery, as the battery product of present the most popular and most main flow, is accepted extensively by society.No matter be in basins such as insert earphone, mobile phone, UPS, electric tools, or in basins such as Large Electric cars, lithium ion battery is playing more and more important effect.
Product category and the structural design of lithium ion battery are more and more diversified, and especially in product basins such as Large Electric cars, its structure is " let a hundred flowers blossom and a hundred schools of thought contend ".In order to meet the large multiplying power in the basins such as electric motor car, low internal resistance requirement, inside battery structure will will be tried one's best many by differentiate fluid lug, can not be confined to an original extreme ear structure.Lug and foil welding position, encase with dielectric high temperature gummed paper, in order to avoid cause battery short circuit herein.When charging to lithium battery, the positive pole of battery has lithium ion to generate, the lithium ion of generation is through electrolyte movement to negative pole, and when discharging to battery, the lithium ion being embedded in negative pole is deviate from, and move back again positive pole.
In to lithium battery activation, the gummed paper of negative pole has lithium and separate out, the precipitation of lithium not only can consume electrolyte, causes battery to reduce penalty because of electrolyte, and the precipitation of lithium simultaneously can form dendrite and puncture barrier film, causes both positive and negative polarity short circuit to cause danger.
[summary of the invention]
Based on this, be necessary to provide a kind of avoid activating after analyse the activation method of the lithium ion battery of lithium.
A kind of lithium ion battery activation method, comprise the following steps: step one, constant-current charging phase, current range is 0.02 ~ 0.1C A, and the charging interval is 1.5 hours ~ 3 hours; Step 2, constant-current constant-voltage charging stage, continuous current scope is 0.1 ~ 0.3C A, constant current charge ends to voltage to predeterminated voltage, constant voltage charge to electric current is 0.01 ~ 0.05CA cut-off afterwards, wherein, when activating ferric phosphate lithium cell, described predeterminated voltage is 3.6V, when activating the lithium ion battery except ferric phosphate lithium cell, described predeterminated voltage is 4.2V; Step 3, constant-current discharge stage, current range is 0.05 ~ 0.2C A, and discharge time is 1 hour ~ 4 hours; Step 4, constant-current constant-voltage charging stage, continuous current is 0.05 ~ 0.2C A, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage charge to electric current is that 0.01 ~ 0.05C A ends afterwards; Step 5, constant-current discharge stage, current range is 0.05 ~ 0.2C A, and discharge time is 1 hour ~ 4 hours; Step 6, constant-current constant-voltage charging stage, continuous current is 0.05 ~ 0.2C A, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage charge to electric current is that 0.01 ~ 0.05C A ends afterwards.
In a preferred embodiment, in step one, electric current is 0.05C A, and the charging interval is 2 hours.
In a preferred embodiment, in step 2, continuous current is 0.2C A, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage 3.6V charges to electric current is afterwards 0.01CA cut-off.
In a preferred embodiment, in step 3, electric current is 0.1C A, and discharge time is 2 hours.
In a preferred embodiment, in step 4, continuous current is 0.1C A, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage 3.6 charges to electric current is afterwards 0.01CA cut-off.
In a preferred embodiment, in step 5, electric current is 0.1C A, and discharge time is 2 hours.
In a preferred embodiment, in step 6, continuous current is 0.1C A, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage 3.6V charges to electric current is afterwards 0.01CA cut-off.
In a preferred embodiment, described lithium ion battery except ferric phosphate lithium cell comprises lithium manganate battery, cobalt acid lithium battery, lithium nickelate battery and cobalt acid lithium-LiMn2O4-lithium nickelate ternary lithium battery.The activation method of above-mentioned lithium ion battery carries out the discharge and recharge of twice small area analysis after normal activation step (step one and step 2), consume the lithium of separating out in normal activation step by the arrangement again of the lithium of negative pole inside, thus analyse lithium after avoiding lithium battery to activate.
[accompanying drawing explanation]
Fig. 1 is the negative pole structure schematic diagram of an execution mode;
Fig. 2 be negative pole in Fig. 1 and positive pole superimposed after structural representation;
Fig. 3 is the schematic diagram after gummed paper separating out lithium that insulate in negative pole in Fig. 1;
Fig. 4 is the schematic diagram that in Fig. 3, negative pole is in another kind of state;
Fig. 5 is the schematic diagram that in Fig. 3, negative pole is in another kind of state;
Fig. 6 be in Fig. 1 negative pole and positive pole superimposed after the structural representation of another state;
Fig. 7 is the flow chart of the lithium ion battery activation method of an execution mode;
Fig. 8 is the negative pole view after the dissection of the lithium ion battery of overactivation.
[embodiment]
Mainly in conjunction with the drawings and the specific embodiments lithium ion battery activation method is described in further detail below.
The lug of lithium ion battery and foil welding position, encase with dielectric high temperature gummed paper, in order to avoid cause battery short circuit herein, but multi pole ears structural design, there will be the situation of the corresponding positive mix of negative pole gummed paper, and the gummed paper of corresponding positive mix there will be and analyses lithium phenomenon.The harm that the precipitation of lithium causes is by practical proof.But the shape that on gummed paper, lithium is separated out and position, lithium from where, when separate out and on gummed paper lithium how Growth Development is all unknown.
Therefore, to determine in lithium ion battery shape that on gummed paper, lithium is separated out and position, lithium from where, when separate out and lithium how Growth Development on gummed paper, the position could separated out according to lithium ion battery and mode take suitable method to improve the fail safe of lithium ion battery.
First lithium ion battery is provided.
In present embodiment, the 26700 cylinder ferric phosphate lithium cells that the capacity of use is 4Ah.Refer to Fig. 1, in lithium ion battery, negative plate 1 is provided with two negative lug 2.The foil of negative plate 1 is Copper Foil, and thickness is 10 μm.Negative lug 2 is copper, and thickness is 50 μm.Mode by continuously coating on negative plate 2 is coated with negative material, exposes Copper Foil afterwards and then negative lug 2 is soldered to negative plate 1 in the position 3 of welding negative lug 2 by the mode of scraper.Negative lug 2 is welded the rear gummed paper 5 that insulate that attaches and is covered the welding position of negative lug 2 and negative plate 1 and the remaining exposed Copper Foil of negative plate 1 with negative plate 1.Insulation gummed paper 5 is lithium ion battery special-purpose high temperature insulation PI gummed paper, and dielectric voltage withstand is greater than 1000V.Be appreciated that insulation gummed paper 5 also can for any gummed paper shielded, as gummed papers such as PP, PE, as long as meet the insulating properties of lithium ion battery requirement.Insulation gummed paper 5 will guarantee integrality.The electronics needed when ensureing that lithium is separated out can not provide electron channel by insulation gummed paper internal flaw.Multilayer gummed paper can be selected to overlap to be guaranteed without electronic defects passage, in present embodiment, adopts two-layer insulation gummed paper to overlap and uses.
Refer to Fig. 2, insulation gummed paper 5 is in negative side, and the positive pole position that the gummed paper that simultaneously insulate is corresponding will have positive mix corresponding.Attach most importance to and analyze the position that lithium separates out in insulation gummed paper 5 position corresponding with the anode material of positive pole 6.
By lithium ion battery through step one, constant-current charging phase, current range is 0.02 ~ 0.1C A, and the charging interval is 1.5 hours ~ 3 hours; Step 2, constant-current constant-voltage charging stage, continuous current scope is 0.1 ~ 0.3CA, constant current charge to voltage is 3.6V cut-off, and constant voltage charge to electric current is after 0.01 ~ 0.05CA cut-off afterwards, dissects battery and the position of the lithium that the insulation gummed paper 5 observing negative pole is separated out and form.Refer to Fig. 3, the lithium 8 of separating out in Fig. 3 is positioned at the middle part of insulation gummed paper 5, and form is similar to square, and the edge of insulation gummed paper 5 does not have lithium to separate out.
The time that further investigation lithium is separated out and position.Adopt and only complete fluid injection, the battery not carrying out activating is tested.From low depth of charge 30%, depth of charge increases progressively 5% step by step, is pre-charged to different current potentials, dissects battery (the preferred time difference is in 0.5h) in time with 0.1C A electric current lithium battery, observes situation negative insulation gummed paper 5 being separated out lithium.
Find through experiment, when depth of charge is low, insulation gummed paper is separated out without any lithium, when depth of charge to 80% time, insulation gummed paper on start to analyse lithium, and lithium start separate out position insulation gummed paper edge, as shown in Figure 4, wherein, 9 is the lithiums of just separating out.
After determining to analyse the depth of charge of lithium, then proceed same gradient charging.Find, along with the increasing of depth of charge, lithium growth development inside gummed paper gradually, Man electricity Shi, reaches maximum.Fig. 5 is lithium growth development figure, and wherein 10 is lithiums that growth develops.
To be full of after electricity unnecessary battery after the operations such as aging, partial volume normally, again to dissect.Find that position and the form of lithium on gummed paper and the lithium shown in Fig. 3 are close.
Show that lithium is separated out from the edge of insulation gummed paper from above experiment.
In order to prove that lithium is separated out from the edge of insulation gummed paper further, bamboo product experiment is verified.Refer to Fig. 6, the anode material of insulation gummed paper 5 marginal position 11 correspondence is wiped off, the positive plate that the centre position of insulation gummed paper 5 is corresponding has anode material.The depth of charge of lifting preliminary filling gradually, after being full of electricity in advance, gummed paper does not have yet lithium separate out.Lithium can not grow from inside gummed paper, because do not have electron channel.This just proves that lithium is separated out from the edge of gummed paper again, and growth develops into inside gummed paper gradually.
According to the characteristic that the lithium of above-mentioned analysis is separated out, need to eliminate the lithium of separating out at lithium battery activation stage.
Refer to Fig. 7, the lithium ion battery activation method of an execution mode, comprises the following steps:
Step S11, constant-current charging phase, current range is 0.02 ~ 0.1C A, and the charging interval is 1.5 hours ~ 3 hours.
In present embodiment, the electric current of constant current charge is 0.1C A, and the charging interval is 2 hours.
Step S12, constant-current constant-voltage charging stage, continuous current scope is 0.1 ~ 0.3C A, constant current charge ends to voltage to predeterminated voltage, constant voltage charge to electric current is 0.01 ~ 0.05CA cut-off afterwards, wherein, when activating ferric phosphate lithium cell, predeterminated voltage is 3.6V, when activating the lithium ion battery except ferric phosphate lithium cell, predeterminated voltage is 4.2V.
In present embodiment, the electric current of constant current charge is 0.2C A, and constant current charge ends to voltage to predeterminated voltage, and constant voltage 3.6V charges to electric current is afterwards 0.01CA cut-off.
Lithium ion battery except ferric phosphate lithium cell includes but not limited to lithium manganate battery, cobalt acid lithium battery, lithium nickelate battery and cobalt acid lithium-LiMn2O4-lithium nickelate ternary lithium battery.
Step S13, constant-current discharge stage, current range is 0.05 ~ 0.2C A, and discharge time is 1 hour ~ 4 hours.
In present embodiment, the electric current of constant-current discharge is 0.1C A, and discharge time is 2 hours.
Step S14, constant-current constant-voltage charging stage, continuous current is 0.05 ~ 0.2C A, and constant current charge ends to voltage to predeterminated voltage, and constant voltage charge to electric current is that 0.01 ~ 0.05C A ends afterwards.
In present embodiment, when activating ferric phosphate lithium cell, predeterminated voltage is 3.6V, and when activating the lithium ion battery except ferric phosphate lithium cell, predeterminated voltage is 4.2V.
In present embodiment, the electric current of constant current charge is 0.1C A, and constant current charge ends to voltage to predeterminated voltage, and constant voltage 3.6V charges to electric current is afterwards that 0.01C A ends.
Step S15, constant-current discharge stage, current range is 0.05 ~ 0.2C A, and discharge time is 1 hour ~ 4 hours.
In present embodiment, the electric current of constant-current discharge is 0.1C A, and discharge time is 2 hours.
Step S16, constant-current constant-voltage charging stage, continuous current is 0.05 ~ 0.2C A, and constant current charge ends to voltage to predeterminated voltage, and constant voltage charge to electric current is that 0.01 ~ 0.05C A ends afterwards.
In present embodiment, when activating ferric phosphate lithium cell, predeterminated voltage is 3.6V, and when activating the lithium ion battery except ferric phosphate lithium cell, predeterminated voltage is 4.2V.
In present embodiment, the electric current of constant current charge is 0.1C A, and constant current charge to voltage is predeterminated voltage, and constant voltage charge to electric current is that 0.01C A ends afterwards.
Refer to Fig. 8, after above-mentioned lithium battery activation method activated lithium battery, dissect battery, insulation gummed paper 5 does not have lithium to separate out, after the electric discharge of twice small area analysis, consume the lithium of separating out in normal activation step by the arrangement again of the lithium of negative pole inside, after avoiding activation, analyse lithium, and then form dendrite in the process avoiding the lithium of separating out to use at battery and puncture barrier film and cause both positive and negative polarity short circuit, thus improve the fail safe of lithium ion battery.
Be below specific embodiment part:
Embodiment 1
The lithium ion battery activation method of one execution mode, comprises the following steps:
Step S21, constant-current charging phase, the electric current of constant current charge is 0.02CA, and the charging interval is 3h.
Step S22, constant-current constant-voltage charging stage, the electric current of constant current charge is 0.1C A, and constant current charge to voltage is 3.6V cut-off, and constant voltage 3.6V charges to electric current is afterwards that 0.01C A ends.In present embodiment, lithium ion battery is ferric phosphate lithium cell.
Step S23, constant-current discharge stage, the electric current of constant-current discharge is 0.05CA, and discharge time is 4h.
Step S24, constant-current constant-voltage charging stage, the electric current of constant current charge is 0.05C A, and constant current charge to voltage is 3.6V, and constant voltage 3.6V charges to electric current is afterwards that 0.01C A ends.
Step S25, constant-current discharge stage, the electric current of constant-current discharge is 0.05CA, and discharge time is 4h.
Step S26, constant-current constant-voltage charging stage, the electric current of constant current charge is 0.05C A, and constant current charge to voltage is 3.6V, and constant voltage 3.6V charges to electric current is afterwards that 0.01C A ends.
After the lithium battery of said method activation is dissected, insulation gummed paper does not have lithium to separate out.
Embodiment 2
The lithium ion battery activation method of one execution mode, comprises the following steps:
Step S31, constant-current charging phase, the electric current of constant current charge is 0.1C A, and the charging interval is 1.5h.
Step S32, constant-current constant-voltage charging stage, the electric current of constant current charge is 0.3C A, and constant current charge to voltage is 4.2V cut-off, and constant voltage 4.2V charges to electric current is afterwards that 0.05C A ends.In present embodiment, lithium ion battery is cobalt acid lithium-LiMn2O4-lithium nickelate ternary lithium battery.
Step S33, constant-current discharge stage, the electric current of constant-current discharge is 0.2C A, and discharge time is 1h.
Step S34, constant-current constant-voltage charging stage, the electric current of constant current charge is 0.2C A, and constant current charge to voltage is 4.2V, and constant voltage 4.2V charges to electric current is afterwards that 0.05C A ends.
Step S35, constant-current discharge stage, the electric current of constant-current discharge is 0.2C A, and discharge time is 1h.
Step S36, constant-current constant-voltage charging stage, the electric current of constant current charge is 0.2C A, and constant current charge to voltage is 4.2V, and constant voltage 4.2V charges to electric current is afterwards that 0.05C A ends.
After the lithium battery of said method activation is dissected, insulation gummed paper does not have lithium to separate out.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (5)
1. a lithium ion battery activation method, is characterized in that, comprises the following steps:
Step one, constant-current charging phase, current range is 0.02 ~ 0.1C, and the charging interval is 1.5 hours ~ 3 hours;
Step 2, the constant-current constant-voltage charging stage, continuous current scope is 0.1 ~ 0.3C, constant current charge ends to voltage to predeterminated voltage, under described predeterminated voltage, constant voltage charge to electric current is 0.01 ~ 0.05C cut-off afterwards, wherein, described lithium ion battery is the lithium ion battery except ferric phosphate lithium cell, when lithium ion battery except ferric phosphate lithium cell is activated, described predeterminated voltage is 4.2V, described lithium ion battery except ferric phosphate lithium cell comprises lithium manganate battery, cobalt acid lithium battery, lithium nickelate battery and cobalt acid lithium-LiMn2O4-lithium nickelate ternary lithium battery,
Step 3, constant-current discharge stage, electric current is 0.1C, and discharge time is 2 hours;
Step 4, constant-current constant-voltage charging stage, continuous current is 0.05 ~ 0.2C, and constant current charge is to voltage to described predeterminated voltage cut-off, and under described predeterminated voltage, constant voltage charge to electric current is 0.01 ~ 0.05C cut-off afterwards;
Step 5, constant-current discharge stage, electric current is 0.1C, and discharge time is 2 hours;
Step 6, constant-current constant-voltage charging stage, continuous current is 0.05 ~ 0.2C, and constant current charge is to voltage to described predeterminated voltage cut-off, and under described predeterminated voltage, constant voltage charge to electric current is 0.01 ~ 0.05C cut-off afterwards.
2. lithium ion battery activation method according to claim 1, is characterized in that, in step one, electric current is 0.05C, and the charging interval is 2 hours.
3. lithium ion battery activation method according to claim 1, is characterized in that, in step 2, continuous current is 0.3C, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage 4.2V charges to electric current is afterwards 0.05C cut-off.
4. lithium ion battery activation method according to claim 1, is characterized in that, in step 4, continuous current is 0.2C, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage 4.2V charges to electric current is afterwards 0.05C cut-off.
5. lithium ion battery activation method according to claim 1, is characterized in that, in step 6, continuous current is 0.2C, and constant current charge is to voltage to described predeterminated voltage cut-off, and constant voltage 4.2V charges to electric current is afterwards 0.05C cut-off.
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| CN103354285A (en) * | 2013-06-21 | 2013-10-16 | 合肥恒能新能源科技有限公司 | Formation activating process for large-capacity lithium iron phosphate |
| CN105576306A (en) * | 2014-10-17 | 2016-05-11 | 东莞新能源科技有限公司 | Fast battery charging method |
| CN106469838A (en) * | 2015-08-14 | 2017-03-01 | 深圳市比克动力电池有限公司 | The charging method of cylinder power lithium-ion battery and device |
| CN109546243A (en) * | 2017-09-22 | 2019-03-29 | 银隆新能源股份有限公司 | A kind of activation method of secondary cell |
| CN111900381B (en) * | 2019-05-05 | 2021-11-02 | 香港城市大学深圳研究院 | Method for activating iron ferricyanide and zinc ion battery prepared thereby |
| CN112751090A (en) * | 2021-01-06 | 2021-05-04 | 武汉力兴(火炬)电源有限公司 | Preparation method of high-power ultralow-temperature lithium ion battery |
| CN115207502B (en) * | 2022-09-14 | 2022-12-13 | 武汉亿纬储能有限公司 | Constant-voltage formation process of lithium battery |
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