CN109755682A - The method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation - Google Patents
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 95
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 239000003792 electrolyte Substances 0.000 title claims abstract description 81
- 230000005284 excitation Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 48
- 230000005611 electricity Effects 0.000 claims abstract description 28
- 230000004907 flux Effects 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 17
- 229910052744 lithium Inorganic materials 0.000 claims description 17
- JDZCKJOXGCMJGS-UHFFFAOYSA-N [Li].[S] Chemical compound [Li].[S] JDZCKJOXGCMJGS-UHFFFAOYSA-N 0.000 claims description 2
- 230000001413 cellular effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000004615 ingredient Substances 0.000 abstract description 4
- 238000004886 process control Methods 0.000 abstract description 3
- 230000003252 repetitive effect Effects 0.000 abstract description 2
- 230000032683 aging Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 239000012528 membrane Substances 0.000 description 9
- 239000007772 electrode material Substances 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 8
- 239000000047 product Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000002431 foraging effect Effects 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- 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 discloses a kind of methods that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation, using double pulse excitation, under conditions of the temperature of setting, magnetic field, electromagnetic wave and particle flux, power-on servicing directly is carried out to lithium ion battery, electrode or independent electrolyte interface film, adjust the state-of-charge of lithium ion battery, lithium ion battery is charged into full power state, then it is discharged to sky electricity condition again, pass through the repetitive operation of charge and discharge, construct that ingredient, thickness, structure are uniform, consistency is high and the electrolyte interface film of process control.By constructing above-mentioned electrolyte interface film, the comprehensive performance of lithium ion battery is further increased.
Description
Technical field
The invention belongs to lithium ion battery technology research fields, and in particular to a kind of to construct lithium ion using double pulse excitation
The method of cell electrolyte interfacial film.
Background technique
Lithium ion battery includes preliminary filling and aging technique in process of production.Traditional preliminary filling technique refers generally to different
Under temperature environment, electrolyte will be infused and placed the battery after a period of time constant-current charge and electric discharge are carried out with low range, finally
Battery is stablized under certain electricity, aging technique is sent to.In detail, during preliminary filling technique battery is charged and discharged,
The interface of battery electrode and electrolyte contact, anolyte portion group branch occur the reduction reaction of electrochemistry driving and aoxidize anti-
It answers, reaction product can preliminarily form electrode electrolyte interface in electrode surface, i.e., a kind of electrode protective membrane.Traditional aging technique
Refer under different temperatures environment, the battery Jing Guo preliminary filling technique is placed for a long time.In detail, aging technique battery placement process
In, the driving reduction reaction of slow non-electrochemical and oxidation reaction occur at contact interface for electrode and electrolyte.Similarly,
Reaction product can be further formed electrode electrolyte interface, further develop and improve electrode protective membrane.In above-mentioned electrode protection
During developing and improving, the loss of film generation is acted on along with the generation of gaseous product, active lithium for the generation of film, and
The irreversible loss in active lithium site in electrode material.
Lithium ion battery after preliminary filling and aging technique completes constructing for electrode electrolyte interface, i.e. electrode is protected
Cuticula construct and the stabilisation of the reversible active site of electrode material.This electrode electrolyte interface can prevent electrolyte
The further generation decomposed, reduce gaseous product of component, reduction active lithium act on the loss of film generation and reduce electrode
The irreversible loss in active lithium site in material.This film is a kind of ion conductive membrane simultaneously, and lithium ion can pass freely through.Institute
With this electrode electrolyte interface constructs the cycle performance that lithium ion battery can be improved, service life, high rate performance, height
Temperature tolerance performance and security performance.
However, traditional preliminary filling technique uses the constant current charge-discharge technique of low range, not only the time is long, and charge and discharge energy consumption is high,
Meanwhile this low range constant current charge-discharge can make electrode surface be chronically at ion diffusion-controlled phase, current density is concentrated
It is grown in lithium concentration advantage site, material surface high reaction activity advantage site, conductivity advantages site and interfacial film
Edge advantage site is grown so electrode electrolyte interface film can be concentrated in advantage site, and the interfacial film in advantage site can be than weak
The interfacial film in gesture site is thicker, and specific gravity of the advantage decomposition product in advantage site is bigger.Likewise, for aging technique, not only
Time is long, and greenhouse energy consumption is high, and interfacial film and predominant product still can continue to thicken in autoreaction advantage site, and specific gravity increases
Greatly.Therefore, the electrolyte interface film that traditional handicraft is constructed is unevenly distributed, ingredient disunity, thickness difference are big, architectural difference
Greatly, i.e., under traditional handicraft, the generation and development of electrolyte interface film are a uncontrollable processes, then to the shadow of battery performance
Sound is also uncontrollable.Meanwhile the difference of interfacial film growth will lead to the difference of electrode protection, i.e. protection of the interfacial film to positive and negative electrode
Degree can have differences；Adjoint gas production is big in traditional handicraft, and active lithium loss is more, the loss of electrode material activity lithium site
It is more.Therefore, there are biggish limitations for raising of traditional preliminary filling aging technique to battery comprehensive performance.
In conclusion reducing the growth of electrolyte interface film if can find suitable method constructs electrolyte interface film
Otherness, the loss for reducing gas production, reducing active lithium, the loss for reducing active lithium site, so that the life of electrolyte interface film
Producing becomes a controllable process, this is of great significance for further increasing the comprehensive performance of lithium ion battery.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention provides a kind of double pulse excitations to construct lithium ion battery battery
The method for solving matter interfacial film, using double pulse excitation, under conditions of the temperature of setting, magnetic field, electromagnetic wave and particle flux, directly
Power-on servicing is carried out to lithium ion battery, electrode or independent electrolyte interface film, adjusts the state-of-charge of lithium ion battery,
Lithium ion battery is charged into full power state, is then discharged to sky electricity condition again, by the repetitive operation of charge and discharge, is constructed
Ingredient, thickness, structure are uniform, the electrolyte interface film of consistency height and process control.By constructing above-mentioned electrolyte interface
Film further increases the comprehensive performance of lithium ion battery.
Present invention technical effect to be achieved is realized by following scheme:
Invention provides a kind of method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation, which is characterized in that including
Following steps:
S01 under setting condition, carries out double pulse excitation to lithium ion battery, adjusts the state-of-charge of the lithium ion battery；
S02 adjusts the parameter of the double pulse excitation according to the state-of-charge；
S03 repeats S01 ~ S02, constructs the electrolyte interface film of the lithium ion battery.
A kind of method for constructing electrolyte interface film is provided in the present invention.By lithium ion battery under setting condition, adopt
Lithium ion battery is motivated with dual-pulse power supply, with pulse reversal or voltage, in the waveform of setting, frequency and is accounted for
Sky carries out power-on servicing to lithium ion battery than lower.Construction method in the present invention to the original state of lithium ion battery without
It limits, to the new lithium ion battery finished is just assembled, uniform electrolyte interface can be formed in inside battery by this method
Film；To the old lithium ion battery used after a period of time, the uniform journey of its electrolyte interface film can be improved by this method
Degree.Suitable charged shape is set as needed without limiting to the state-of-charge of battery before and after double pulse excitation in the present invention
State.Preferably, battery is charged to by full electricity by dipulse, then is discharged to empty electricity, repeated to be charged to full electricity-and put to empty electricity
Operation, advantageously forms the more uniform electrolyte interface film of structure.
Power-on servicing directly can be carried out to battery electrode or independent electrolyte interfacial film in the present invention, construct electrolysis
Matter interfacial film or independent electrolyte interfacial film.It is being powered after a certain period of time, the state-of-charge of battery changes, then according to electricity
The state-of-charge in pond adjusts the parameter of dual-pulse power supply, then carries out power-on servicing to lithium ion battery.Pass through the repetition of charge and discharge
Operation, constructs that ingredient, thickness, structure are uniform, and consistency is high and the electrolyte interface film of process control.By constructing above-mentioned electricity
Matter interfacial film is solved, the comprehensive performance of lithium ion battery is further increased.
Dipulse electric current or voltage can be in lithium ion battery electrode material surface forward direction lithium concentrations in the present invention
In the section drastically reduced, the raising of lithium concentration is reversely given, so that it is dense that electrode material surface lithium ion is effectively reduced
Reduced rate is spent, the uniformity of electrode material surface lithium ion is improved；Reverse impulse has film advantage site certain simultaneously
Elimination effect, the difference between advantage site and weak tendency site can be reduced, avoid interfacial film raw in the concentration in advantage site
It is long, improve the uniformity of interfacial film.On the other hand, reconstruction current lead-through and current density net can be updated by repeating power-on servicing
Road, the advantage work for reducing the active site of electrode material, reducing high conductivity site and interfacial film growing edge to current density
With so that current density is uniformly distributed to the greatest extent.Electrolyte interface film advantage position can also be inhibited by repeating power-on servicing
The growth of point, makes the specific gravity of advantage decomposition product tend to homogenize, so that interfacial film overall distribution is uniform.
Further, the lithium ion battery is commercial li-ion battery, high temperature lithium ion battery, solid lithium ion electricity
Pond, lithium-air battery or lithium-sulfur cell.
Further, the lithium ion battery be cylindrical lithium ion battery, soft bag lithium ionic cell or square lithium from
Sub- battery.
The construction method of electrolyte interface film has wide applicability in the present invention, to lithium-ion electric common at present
The different size model of pond and common lithium ion battery all has good applicability, can be used to construct above-mentioned lithium ion
The electrolyte interface film of battery.
Preferably, the lithium ion battery is the lithium ion battery after having added electrolyte and having stood；The time of repose
For 1-30h.
Further, described impose a condition includes set temperature parameter, magnetic field parameter, electromagnetism wave parameter, particle flux parameter.
Preferably, the temperature is -50 ~ 1200 DEG C；The magnetic field strength is 0.01-1000T；The electromagnetic wavelength is
10-10~1012M, intensity is 0.01 ~ 1015W/m2；The particle flux wavelength is 10-20~10-10M, intensity is 0.01 ~ 1015W/m2。
Further, the waveform of the double pulse excitation be sinusoidal, circle, rectangular, triangle, index shape, to number form
One or more of.
Further, S01 ~ S02 is repeated in S03, and the lithium ion battery is adjusted to full power state, is then adjusted again
It saves to empty electricity condition.
Further, the electrolyte interface includes electrode electrolyte interface film, independent electrolyte interfacial film.
Further, the electrolyte interface film pattern be one of threadiness, tubulose, sheet, spherical or cellular or
It is several.
Parameter, the environmental parameter, magnetic of double pulse excitation can be adjusted in the present invention according to the state-of-charge of lithium ion battery
Field parameters, electromagnetism wave parameter and particle flux parameter, and then regulate and control the generating rate and distribution of advantage decomposition product, from
And control electrolyte interface film at be grouped as, at membrane capacity, film forming thickness, and at membrane structure.By to film forming procedure
It adjusts, solves the variability issues of electrolyte interface film growth, while gas production is reduced, active lithium loss is reduced, electrode material
Expect that active site loss is reduced, eventually by the comprehensive performance for constructing uniform electrolyte interface film and improving lithium ion battery.
The invention has the following advantages that
1. the method in the present invention by double pulse excitation constructs electrolyte interface film, compared with traditional preliminary filling aging technique,
Operating time shortens, and energy consumption is greatly reduced.
2. the electrolyte interface film uniformity that double pulse excitation is constructed in the present invention is good, film forming component, at membrane capacity, at
It is film thickness, uniform at membrane structure.
3. in the present invention double pulse excitation parameter, environmental parameter, magnetic can be adjusted according to the state-of-charge of lithium ion battery
Field parameters, electromagnetism wave parameter, particle flux parameter realize the controllableization operation that electrolyte interface film is constructed.
4. the method for constructing electrolyte interface film in the present invention is applied widely, to different model, different size, no
Lithium ion battery with original state all has good applicability.
Detailed description of the invention
Fig. 1 is the schematic diagram of dipulse electric current in the present invention.
Fig. 2 is the operation schematic diagram that electrolyte interface film is constructed in the present invention.
Fig. 3 is cycle performance of lithium ion battery figure in the present invention.
Specific embodiment
The present invention will be described in detail with reference to the accompanying drawings and examples.
1. electrode electrolyte interface film is constructed.
Embodiment 1
Lithium ion battery is 18650 column lithium ion batteries in the present embodiment, and lithium ion battery is stood for 24 hours, is then being set
Double pulse excitation is carried out to it under fixed condition.Imposing a condition is temperature 60 C；Magnetic field strength is 2T, magnetic direction and cylindrical center
Axis is parallel, towards anode；Electromagnetic wavelength is 5 × 10-7M, intensity is 10W/m2, electromagnetic wave direction and cylindrical center's axis it is flat
Row, towards anode；Particle flux wavelength is 5 × 10-11M, intensity is 100W/m2, particle flux direction it is parallel with cylindrical center's axis,
Towards anode.
The pulse reversal of dual-pulse power supply is as shown in Fig. 1, and the waveform of double pulse excitation is triangle, positive peak H+
For 2C, negative peak H-For 1C, frequency 1KHz, positive negative duty is respectively 50% and 30%.Charging current waveform in charging process
Area S+Greater than discharge current waveform area S-, discharge current waveform area S in discharge process-Greater than charging current waveform area S+。
Power-on servicing is carried out to lithium ion battery using dual-pulse power supply, it is as shown in Fig. 2 to be powered on schematic diagram.It will be electric
Pond state-of-charge is adjusted to 5%SOC, then proceeds by double pulse excitation (double pulse excitation parameter constant), battery is charged to
Full electricity 100%SOC state, is then discharged to sky electricity condition again.Complete constructing for electrode electrolyte interface film.
Embodiment 2
Lithium ion battery is 2614891 rectangular lithium ion batteries in the present embodiment, and lithium ion battery is stood for 24 hours, is then being set
Double pulse excitation is carried out to it under fixed condition.Imposing a condition is temperature 60 C；Magnetic field strength is 3T, magnetic direction and rectangular pole piece
Plane is vertical, towards anode；Electromagnetic wavelength is 8 × 10-7M, intensity is 50W/m2, electromagnetic wave direction and rectangular pole piece plane hang down
Directly, towards anode；Particle flux wavelength is 3 × 10-11M, intensity is 90W/m2, particle flux direction it is vertical with rectangular pole piece plane, face
To anode.
The waveform of double pulse excitation is rectangular, positive peak H+For 3C, negative peak H-For 1.5C, frequency 1KHz, positive and negative duty
Than being respectively 40% and 45%.
Power-on servicing is carried out to lithium ion battery using dual-pulse power supply.Battery charge state is adjusted to 15%SOC, so
After continue double pulse excitation, double pulse excitation is adjusted to positive peak H+For 2C, negative peak H-For 1C, frequency 1KHz is positive and negative
Duty ratio is respectively 55% and 35%., battery is charged into full electricity 100%SOC state, is then discharged to sky electricity condition again.Complete electricity
Pole electrolyte interface film is constructed.
Embodiment 3
Lithium ion battery is 2014891 soft bag lithium ionic cells in the present embodiment, and lithium ion battery is stood for 24 hours, is then being set
Double pulse excitation is carried out to it under fixed condition.Imposing a condition is temperature 60 C；Magnetic field strength is 2T, magnetic direction and Soft Roll pole piece
Plane is vertical, towards anode；Electromagnetic wavelength is 4 × 10-7M, intensity is 30W/m2, electromagnetic wave direction and Soft Roll pole piece plane hang down
Directly, towards anode；Particle flux wavelength is 7 × 10-11M, intensity is 120W/m2, particle flux direction it is vertical with Soft Roll pole piece plane,
Towards anode.
The waveform of double pulse excitation is rectangular, positive peak H+For 5C, negative peak H-For 3C, frequency 1KHz, positive negative duty
Respectively 50% and 40%.
Power-on servicing is carried out to lithium ion battery using dual-pulse power supply.Battery charge state is adjusted to 10%SOC, so
After continue double pulse excitation, double pulse excitation is adjusted to positive peak H+For 3.5C, negative peak H-For 2.5C, frequency 1KHz,
Positive negative duty is respectively 60% and 30%., battery is charged into full electricity 100%SOC state, is then discharged to sky electricity condition again.It is complete
At constructing for electrode electrolyte interface film.
Embodiment 4
Compared with Example 1, the present embodiment the difference is that: during power-on servicing, battery charge state is adjusted
To 10%SOC, double pulse excitation (double pulse excitation parameter constant) is then proceeded by, battery is charged into 110%SOC state,
Then it is discharged to 8%SOC state again.Complete constructing for electrode electrolyte interface film.
Embodiment 5
Compared with Example 1, the present embodiment the difference is that: during power-on servicing, battery charge state is adjusted
To 10%SOC, double pulse excitation (double pulse excitation parameter constant) is then proceeded by, battery is charged into 115%SOC state,
Then it is discharged to 15%SOC state again.Complete constructing for electrode electrolyte interface film.
Embodiment 6
Compared with Example 1, the present embodiment the difference is that: during power-on servicing, battery charge state is adjusted
To 10%SOC, double pulse excitation (double pulse excitation parameter constant) is then proceeded by, battery is charged into 80%SOC state, so
It is discharged to 15%SOC state again afterwards.Complete constructing for electrode electrolyte interface film.
Comparative example 1
Lithium ion battery is 18650 column lithium ion batteries in this comparative example.Traditional preliminary filling aging technique is carried out to battery,
It is then 0.01C with 4.2V constant-voltage charge to cut-off current, then with the electricity of 1C with 0.5C electric current constant-current charge to 4.2V at 60 DEG C
Stream is discharged to empty electricity.Complete constructing for electrode electrolyte interface film.
Comparative example 2
Lithium ion battery is 2614891 rectangular lithium ion batteries in this comparative example.Traditional preliminary filling aging technique is carried out to battery,
It is then 0.01C with 4.2V constant-voltage charge to cut-off current, then with the electricity of 1C with 0.5C electric current constant-current charge to 4.2V at 60 DEG C
Stream is discharged to empty electricity.Complete constructing for electrode electrolyte interface film.
Comparative example 3
Lithium ion battery is 2014891 soft bag lithium ionic cells in this comparative example.Traditional preliminary filling aging technique is carried out to battery,
It is then 0.01C with 4.2V constant-voltage charge to cut-off current, then with the electricity of 1C with 0.5C electric current constant-current charge to 4.2V at 60 DEG C
Stream is discharged to empty electricity.Complete constructing for electrode electrolyte interface film.
2. the test of electrode electrolyte interface film.
Porosity measurement is carried out to the electrode electrolyte interface film constructed in embodiment 1-6, comparative example 1-3；Observation circle
The uniformity coefficient of facial mask.Test result such as table 1.
Table 1
3. performance of lithium ion battery is tested.
Cycle performance test is carried out to lithium ion battery in embodiment 1-6, comparative example 1-3.To lithium ion battery with 0.5C
Current cycle 100 times.Loop test result is as shown in Fig. 3.
4. test result analysis.
As shown in Table 1, compared with traditional preliminary filling aging technique, the interface membrane porosity constructed in the present invention is higher, and
Thickness is uniform.By embodiment 1, embodiment 4, embodiment 5, the result of embodiment 6 it is found that double pulse excitation process in the present invention
In, battery is charged into full electricity, then be discharged to empty electricity, obtained interface membrane porosity is higher.Higher porosity can improve
The adsorption capacity of electrolyte interface film improves its imbibition rate and wellability to electrolyte, comes into full contact with it with electrolyte, mention
The chemical property of high battery.
By attached drawing 3 it is found that being compared by embodiment 1, embodiment 4, embodiment 6, comparative example 1, identical lithium-ion electric
Pond, through the invention in method construct interfacial film after, the cycle performance of battery improves.Pass through embodiment 1 and embodiment 4, reality
Apply example 5, embodiment 6 compares, further illustrate in the present invention during double pulse excitation, battery charged into full electricity, then put
Electricity is to empty electric charge and discharge electric excitation most beneficial for the comprehensive performance for improving lithium ion battery.
Finally, it should be noted that above embodiments be only to illustrate the technical solution of the embodiment of the present invention rather than to its into
Row limitation, although the embodiment of the present invention is described in detail referring to preferred embodiment, those skilled in the art
It should be understood that the technical solution of the embodiment of the present invention can be still modified or replaced equivalently, and these are modified or wait
The range of modified technical solution disengaging technical solution of the embodiment of the present invention cannot also be made with replacement.
Claims (10)
1. a kind of method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation, which comprises the steps of:
S01 under setting condition, carries out double pulse excitation to lithium ion battery, adjusts the state-of-charge of the lithium ion battery；
S02 adjusts the parameter of the double pulse excitation according to the state-of-charge；
S03 repeats S01 ~ S02, constructs the electrolyte interface film of the lithium ion battery.
2. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that: institute
Stating lithium ion battery is commercial li-ion battery, high temperature lithium ion battery, solid lithium ion battery, lithium-air battery or lithium sulphur
Battery.
3. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that: institute
Stating lithium ion battery is cylindrical lithium ion battery, soft bag lithium ionic cell or square lithium ion battery.
4. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that: institute
Stating lithium ion battery is the lithium ion battery after having added electrolyte and having stood；The time of repose is 1-30h.
5. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that: institute
Stating setting condition includes set temperature parameter, magnetic field parameter, electromagnetism wave parameter, particle flux parameter.
6. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as claimed in claim 5, it is characterised in that: institute
Stating temperature is -50 ~ 1200 DEG C；The magnetic field strength is 0.01-1000T；The electromagnetic wavelength is 10-10~1012M, intensity is
0.01~1015W/m2；The particle flux wavelength is 10-20~10-10M, intensity is 0.01 ~ 1015W/m2。
7. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that: institute
State double pulse excitation waveform be sinusoidal, circle, rectangular, triangle, index shape, to one or more of number form.
8. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that:
S01 ~ S02 is repeated in S03, and the lithium ion battery is adjusted to full power state, is then adjusted to sky electricity condition again.
9. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that: institute
Stating electrolyte interface includes electrode electrolyte interface film, independent electrolyte interfacial film.
10. the method that lithium ion battery electrolyte interfacial film is constructed in double pulse excitation as described in claim 1, it is characterised in that:
The electrolyte interface film pattern is one or more of threadiness, tubulose, sheet, spherical or cellular.
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| JP7461386B2 (en) | 2021-06-17 | 2024-04-03 | 寧徳時代新能源科技股▲分▼有限公司 | CHARGING CONTROL METHOD AND DEVICE, BATTERY MANAGEMENT SYSTEM, AND READABLE STORAGE MEDIUM |
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| CN111477967A (en) * | 2020-04-10 | 2020-07-31 | 浙江工业大学 | Method for preparing SEI film through magnetization |
| JP7461386B2 (en) | 2021-06-17 | 2024-04-03 | 寧徳時代新能源科技股▲分▼有限公司 | CHARGING CONTROL METHOD AND DEVICE, BATTERY MANAGEMENT SYSTEM, AND READABLE STORAGE MEDIUM |
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