CN111403819A - Method for improving electrolyte infiltration of ternary battery and battery obtained by method - Google Patents
Method for improving electrolyte infiltration of ternary battery and battery obtained by method Download PDFInfo
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- CN111403819A CN111403819A CN202010374541.6A CN202010374541A CN111403819A CN 111403819 A CN111403819 A CN 111403819A CN 202010374541 A CN202010374541 A CN 202010374541A CN 111403819 A CN111403819 A CN 111403819A
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 239000003792 electrolyte Substances 0.000 title claims abstract description 50
- 230000008595 infiltration Effects 0.000 title claims abstract description 18
- 238000001764 infiltration Methods 0.000 title claims abstract description 18
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 22
- 238000012360 testing method Methods 0.000 claims description 21
- 238000009413 insulation Methods 0.000 claims description 18
- 238000012216 screening Methods 0.000 claims description 18
- 230000002950 deficient Effects 0.000 claims description 15
- 238000004806 packaging method and process Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 7
- 239000007774 positive electrode material Substances 0.000 claims description 4
- 230000000284 resting effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000002791 soaking Methods 0.000 abstract description 13
- 230000015572 biosynthetic process Effects 0.000 abstract description 10
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 3
- 239000006245 Carbon black Super-P Substances 0.000 description 2
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- HFCVPDYCRZVZDF-UHFFFAOYSA-N [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O Chemical compound [Li+].[Co+2].[Ni+2].[O-][Mn]([O-])(=O)=O HFCVPDYCRZVZDF-UHFFFAOYSA-N 0.000 description 1
- KFDQGLPGKXUTMZ-UHFFFAOYSA-N [Mn].[Co].[Ni] Chemical compound [Mn].[Co].[Ni] KFDQGLPGKXUTMZ-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012858 packaging process Methods 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a method for improving electrolyte infiltration of a ternary battery and the battery obtained by the method. The method comprises the following steps: and sequentially carrying out the processes of vibration and vacuum standing on the three-element battery after liquid injection. The method aims to solve the problems that in the prior art, a high-nickel ternary soft-package power lithium ion battery adopts a method of one-time liquid injection and long-time standing at normal temperature and normal pressure, so that the distribution of electrolyte is uneven, and the formation of an SEI film is influenced. The method replaces normal-temperature and normal-pressure standing with vibration and vacuum standing, and the vibration is carried out after the battery is injected with liquid, so that the time for soaking the electrolyte is effectively shortened, and the efficiency for soaking the electrolyte is improved; and then, the conventional standing at normal temperature and normal pressure is replaced by vacuum standing, so that the soaking time of the electrolyte on the mesopores and the micropores of the electrode plate is reduced, the soaking effect is improved, the cycle life is prolonged, the production and manufacturing process of the soft package lithium ion battery is shortened, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of lithium ion batteries, and particularly relates to a method for improving electrolyte infiltration of a ternary battery and the obtained battery.
Background
Because of the characteristics of higher working voltage, energy density, long service life, environmental friendliness and the like, the lithium ion battery has become a power supply of a new generation of electric vehicles, electric tools and electronic products, and is widely applied to different fields such as energy, traffic, communication and the like at present.
Currently, commercial power lithium ion batteries are mainly lithium cobaltate, lithium manganate, lithium iron phosphate and nickel cobalt manganese ternary batteries. The lithium cobaltate is not suitable for the category of power batteries because of the worst thermal safety stability, the lithium manganate is limited in use because of low energy density, and the lithium iron phosphate is used as a technical skill developed earlier, so that the lithium cobaltate has the advantages of excellent safety, environmental protection and high cycle life, but has the defects of low energy density and close reaching of a ceiling, and the ternary battery has the advantage of high energy density upper limit, and the technical skill is continuously advanced in the future, so that the safety problem is gradually improved, and the ternary battery is still the best choice in the category of power batteries at present before the technical skill of other batteries is not broken through. The ternary material (nickel cobalt lithium manganate) can greatly improve the specific capacity of the material by improving the content of nickel, so that the high-nickel ternary material is inevitably an ideal material for large-scale batteries in the future.
The current commercialized high-nickel ternary soft-package power lithium ion battery generally adopts a method of one-time liquid injection and long-time standing at normal temperature and normal pressure. After liquid injection, the battery is subjected to vacuum standing for about 1min, then edge sealing is carried out on the battery through heat sealing, and finally standing is carried out for 48h at normal temperature and normal pressure. The electrolyte is a carrier for transporting lithium ions in the charging and discharging process of the battery, the requirement of the electrolyte on the flowing of the electrolyte in the porous medium of the battery is very high in the liquid injection process, and the electrolyte is required to fully infiltrate the anode and the cathode of the battery and the diaphragm of the battery. After the high-nickel ternary soft-package power lithium ion battery is completely injected with liquid, the high-nickel ternary soft-package power lithium ion battery needs to be stood for a long time at normal temperature and normal pressure, so that the electrolyte is completely soaked. And then carrying out a formation process, and forming a compact SEI film between the lithium ion negative electrode and the diaphragm at the stage. In the conventional liquid injection method, after liquid injection, the standing time in a vacuum environment is short, and the electrolyte is not completely soaked. After the edges are sealed by heat sealing, the battery needs to be stood for a long time at normal temperature and normal pressure to ensure the infiltration of the electrolyte. The method can generate the phenomenon of uneven electrolyte distribution, and the electrolyte is slowly diffused at the flowing end due to the small fringe and pressure difference. Meanwhile, the porosity of the anode, the cathode and the diaphragm is different, so that the diffusion speeds of the electrolyte in the anode, the cathode and the diaphragm are different, and the formation of an SEI film is influenced. And the standing time is too long, which seriously influences the production efficiency.
CN108666640A discloses a low-temperature formation method of a high-nickel ternary lithium battery, which comprises the following steps: a. freezing and solidifying propylene carbonate, and adding the solidified propylene carbonate into an electrolyte A consisting of electrolyte lithium salt and a solvent methyl acetate to obtain an electrolyte B; b. vacuumizing the high-nickel ternary lithium battery to be injected, keeping the propylene carbonate in the electrolyte B solidified, injecting the electrolyte B into the battery, and standing to obtain the battery injected with the electrolyte; c. charging the battery to 3.5V by using a current constant current with the capacity value of 0.2 times of the battery capacity value, and then charging to 4V by using a current constant current with the capacity value of 0.5 times of the battery capacity value; and finally, raising the temperature of the battery to normal temperature, standing and sealing to obtain the low-temperature formed high-nickel ternary lithium battery. However, the electrolyte is directly formed after injection by the method, so that the distribution of the electrolyte is not uniform, and the formation of an SEI film is influenced.
CN109950636A discloses a formation process of a high-nickel ternary lithium ion battery. The process sequentially comprises the following steps: (1) carrying out vacuum liquid injection on the baked battery cell; (2) pre-sealing; (3) standing at a high temperature; (4) primary normal temperature formation; (5) vacuum pumping; (6) secondary normal temperature formation; (7) aging at high temperature; (8) cooling; (9) and (7) sealing. However, the electrolyte is directly formed after injection by the method, so that the distribution of the electrolyte is not uniform, and the formation of an SEI film is influenced.
Therefore, there is a need in the art to develop a method for improving the wetting effect of the electrolyte. The lithium ion battery electrolyte obtained by the method has good infiltration effect and high production efficiency.
Disclosure of Invention
The method aims to solve the problems that in the prior art, a ternary soft package power lithium ion battery (particularly a high-nickel ternary soft package power lithium ion battery) adopts a method of one-time liquid injection and long-time standing at normal temperature and normal pressure, so that the distribution of electrolyte is uneven, and the formation of an SEI film is influenced. The invention provides a method for improving electrolyte infiltration of a ternary battery and the battery obtained by the method. The method can improve the electrolyte infiltration effect; the production and manufacturing time of the battery is shortened, and the production efficiency of the battery is improved.
In order to achieve the purpose, the invention adopts the following technical scheme:
one of the objectives of the present invention is to provide a method for improving electrolyte infiltration of a ternary battery, wherein the method comprises: and sequentially carrying out the processes of vibration and vacuum standing on the three-element battery after liquid injection.
The method of combining vibration and vacuum standing replaces normal-temperature and normal-pressure standing, and the battery is vibrated after being injected with liquid, so that the time for soaking the electrolyte can be effectively shortened, and the efficiency of soaking the electrolyte can be improved; and then, the conventional standing at normal temperature and normal pressure is replaced by vacuum standing, so that the soaking time of the electrolyte on the mesopores and the micropores of the electrode plate is further reduced, the soaking effect is improved, the cycle life is prolonged, the production and manufacturing process of the soft package lithium ion battery is shortened, and the production efficiency is improved. The optimal technical effect can be achieved only by combining vibration and vacuum standing, and the technical effect of the invention can not be achieved by only vibration or vacuum standing.
Preferably, the shaking is performed on a shaking frame.
Preferably, the frequency of the vibration is 10Hz to 50Hz, such as 15Hz, 20Hz, 25Hz, 30Hz, 35Hz, 40Hz or 45Hz, etc.
The vibration frequency is 10 Hz-50 Hz, the vibration frequency is too low, and the electrolyte infiltration effect is not obvious; the vibration frequency is too high, and the internal structure of the soft package lithium ion battery, particularly the positive and negative pole pieces are easy to damage.
Preferably, the shaking time is 5-10 min, such as 5.5min, 6min, 6.5min, 7min, 7.5min, 8min, 8.5min, 9min or 9.5 min.
The vibration time is 5-10 min, the vibration time is too short, and the electrolyte infiltration effect is poor; the vibration time is too long, the infiltration effect of the soft-package force ion battery is limited, and the production efficiency is influenced.
Preferably, after the vibration, a screening process is further included.
Preferably, after the vibration and before the screening, a process of packaging the battery is further included.
The process of packaging is not specifically limited in the present invention, and those skilled in the art can select the packaging process according to the prior art.
Preferably, the screening is: and testing the insulation resistance to screen out defective products.
The defective products of the invention are: under the test condition of 50V voltage, the resistance is more than 100M omega.
Preferably, the resting is under vacuum.
Preferably, the vacuum degree of the standing is-80 to-90 KPa, such as-81 KPa, -82KPa, -83KPa, -84KPa, -85KPa, -86KPa, -87KPa, -88KPa or-89 KPa.
The vacuum degree of the vacuum standing is-80 to-90 KPa, the vacuum degree is too low, an ideal infiltration effect is achieved, and the time consumption is long; the vacuum degree is too high, and the pole piece in the battery is damaged.
Preferably, the ternary battery is a pouch battery.
Preferably, the ternary battery is a high nickel ternary battery.
The high-nickel ternary battery is a ternary material with the nickel content of which the molar content in the ternary positive electrode material is more than or equal to 60 percent.
Preferably, the vacuum standing time is 30-90 min, such as 32min, 35min, 40min, 45min, 48min, 50min, 55min, 56min, 60min, 65min, 70min, 80min or 85 min.
As a preferred technical scheme, the method for improving the electrolyte infiltration of the ternary battery comprises the following steps:
and (3) vibrating the three-element battery after liquid injection with the frequency of 10-50 Hz for 5-10 min, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 30-90 min in an environment with the vacuum degree of-80 to-90 KPa.
A second object of the present invention is to provide a lithium ion battery obtained by the method of the first object.
Preferably, the positive active material in the lithium ion battery is a high-nickel ternary positive material.
Compared with the prior art, the invention has the following beneficial effects:
the invention adopts a method combining vibration and vacuum standing to replace normal temperature and normal pressure standing, effectively shortens the time of soaking the electrolyte, reduces the soaking time of the electrolyte on electrode plate mesopores and micropores, improves the soaking efficiency of the electrolyte, improves the soaking effect and the cycle life, shortens the production and manufacturing process of the soft package lithium ion battery, and improves the production efficiency. Compared with the standing at normal temperature and normal pressure in the prior art, the method can effectively shorten the soaking time of the electrolyte, and is suitable for industrial production.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
In the high-nickel ternary soft package battery used in the embodiment of the invention, the positive electrode is a positive electrode active material (NCM523), the mass ratio of the conductive carbon black Super-P to the polyvinylidene fluoride is 93:4:3, the negative electrode is a negative electrode, the mass ratio of the graphite to the conductive carbon black Super-P to the carboxymethyl cellulose (CMC) is 95:2.5:2.5, and the electrolyte is L iPF with 1 mol/L6(EC: EMC volume ratio ═ 1: 1).
Example 1
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 25Hz in sequence, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-80 KPa.
Example 2
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 10Hz, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-80 KPa.
Example 3
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 50Hz, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-80 KPa.
Example 4
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 5Hz, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-80 KPa.
Example 5
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 60Hz, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-80 KPa.
Example 6
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 25Hz in sequence, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-100 KPa.
Example 7
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 25Hz in sequence, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 60min in an environment with the vacuum degree of-70 KPa.
Example 8
And (3) vibrating the high-nickel ternary soft package battery after liquid injection at the frequency of 50Hz for 5min, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 30min in an environment with the vacuum degree of-90 KPa.
Example 9
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 10min at the frequency of 10Hz in sequence, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 50min in an environment with the vacuum degree of-85 KPa.
Comparative example 1
And standing the high-nickel ternary soft package battery after liquid injection for 60min in an environment with the vacuum degree of-80 KPa, namely, not vibrating.
Comparative example 2
And (3) vibrating the high-nickel ternary soft package battery after liquid injection for 8min at the frequency of 25Hz in sequence, testing the insulation resistance after packaging the battery, screening out defective products, and standing for 60min in the environment of normal temperature and normal pressure.
And (3) performance testing:
the batteries obtained in the examples and comparative examples were subjected to insulation resistance test, normal-temperature rate discharge test, and normal-temperature rate charge test, and the test results are shown in table 1:
TABLE 1
It can be seen from table 1 that the factors affecting the electrolyte infiltration effect, frequency > vacuum degree > standing time, and the standing time affects the production efficiency in addition to the electrolyte infiltration effect.
As can be seen from table 1, examples 4 to 5 of the present invention have poorer electrochemical properties and lower insulation resistance than example 1, because the frequency of vibration is lower in example 4, the electrolyte wetting effect is not good; the frequency of vibrations is higher in embodiment 5, and soft package lithium ion battery inner structure, especially positive and negative pole piece are impaired easily.
As can be seen from Table 1, the electrochemical performance of the embodiments 6-7 of the invention is poorer than that of the embodiment 1, and the insulation resistance is lower, because the vacuum degree in the embodiments 6-7 is too high or too low, and the vacuum degree is too low, an ideal infiltration effect is achieved, and the consumed time is longer; the vacuum degree is too high, and the pole piece in the battery is damaged.
Compared with the embodiment 1, the comparative example 1-2 has smaller insulation resistance and gram volume, and the electrolyte can not be fully infiltrated by simple vacuum standing or vibration, so that the optimal test range, frequency (10-50 Hz), vibration time (5-10 min), vacuum degree (-80 to-90 KPa) and standing time (30-90 min) are selected.
The present invention is illustrated in detail by the examples described above, but the present invention is not limited to the details described above, i.e., it is not intended that the present invention be implemented by relying on the details described above. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. A method for improving electrolyte infiltration of a ternary battery, the method comprising: and sequentially carrying out the processes of vibration and vacuum standing on the three-element battery after liquid injection.
2. The method of claim 1, wherein the vibration is performed on a vibration stand.
3. A method according to claim 1 or 2, wherein the frequency of the vibrations is in the range of 10Hz to 50 Hz.
4. The method according to any one of claims 1 to 3, wherein the shaking time is 5 to 10 min.
5. The method of any one of claims 1-4, wherein after said shaking, further comprising a screening process;
preferably, after the vibration and before the screening, the method further comprises a process of packaging the battery;
preferably, the screening is: and testing the insulation resistance to screen out defective products.
6. The method of any one of claims 1 to 5, wherein the vacuum resting is resting under a vacuum environment;
preferably, the vacuum degree of the vacuum standing is-80 to-90 KPa.
7. The method of any one of claims 1-6, wherein the ternary battery is a pouch battery;
preferably, the ternary battery is a high nickel ternary battery.
8. The method according to any one of claims 1 to 7, wherein the vacuum standing time is 30 to 90 min.
9. The method according to one of claims 1 to 8, characterized in that the method comprises:
and (3) vibrating the three-element battery after liquid injection with the frequency of 10-50 Hz for 5-10 min, packaging the battery, testing the insulation resistance, screening out defective products, and standing for 30-90 min in an environment with the vacuum degree of-80 to-90 KPa.
10. A lithium ion battery, characterized in that it is obtained by the method according to any one of claims 1 to 9;
preferably, the positive active material in the lithium ion battery is a high-nickel ternary positive material.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018449A (en) * | 2020-08-13 | 2020-12-01 | 昆山聚创新能源科技有限公司 | Manufacturing method and hot-pressing device for lithium battery soft package battery cell |
| CN112768777A (en) * | 2020-12-28 | 2021-05-07 | 蜂巢能源科技有限公司 | Battery interface improving method and battery interface improving system |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037456A (en) * | 2014-06-16 | 2014-09-10 | 张晶晶 | Rapid forming process of iron phosphate lithium battery |
| CN106602144A (en) * | 2016-11-02 | 2017-04-26 | 天津市捷威动力工业有限公司 | Method and device for shortening standing time of ternary system power battery after liquid injection |
| CN206250301U (en) * | 2016-12-22 | 2017-06-13 | 宁德时代新能源科技股份有限公司 | Infiltration apparatus |
| CN106848187A (en) * | 2016-12-16 | 2017-06-13 | 浙江超威创元实业有限公司 | A kind of method for improving electrodes of lithium-ion batteries rate of liquid aspiration and liquid absorption |
| CN107546419A (en) * | 2017-08-02 | 2018-01-05 | 天津市捷威动力工业有限公司 | Method is shelved after a kind of Soft Roll lamination lithium-ion-power cell fluid injection |
| CN107895815A (en) * | 2017-10-10 | 2018-04-10 | 多氟多（焦作）新能源科技有限公司 | A kind of electrolyte wetting method of soft bag lithium ionic cell |
| CN207765566U (en) * | 2018-01-04 | 2018-08-24 | 宁德新能源科技有限公司 | Battery core immersion equipment |
| CN110783631A (en) * | 2019-10-18 | 2020-02-11 | 淮安骏盛新能源科技有限公司 | Electrolyte infiltration method for lithium battery |
| CN110896155A (en) * | 2018-09-13 | 2020-03-20 | 深圳格林德能源有限公司 | Process for improving electrolyte infiltration of lithium ion battery |
| CN111063857A (en) * | 2019-12-17 | 2020-04-24 | 天津力神电池股份有限公司 | Device and method for standing lithium ion soft package power battery after liquid injection |
-
2020
- 2020-05-06 CN CN202010374541.6A patent/CN111403819A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104037456A (en) * | 2014-06-16 | 2014-09-10 | 张晶晶 | Rapid forming process of iron phosphate lithium battery |
| CN106602144A (en) * | 2016-11-02 | 2017-04-26 | 天津市捷威动力工业有限公司 | Method and device for shortening standing time of ternary system power battery after liquid injection |
| CN106848187A (en) * | 2016-12-16 | 2017-06-13 | 浙江超威创元实业有限公司 | A kind of method for improving electrodes of lithium-ion batteries rate of liquid aspiration and liquid absorption |
| CN206250301U (en) * | 2016-12-22 | 2017-06-13 | 宁德时代新能源科技股份有限公司 | Infiltration apparatus |
| CN107546419A (en) * | 2017-08-02 | 2018-01-05 | 天津市捷威动力工业有限公司 | Method is shelved after a kind of Soft Roll lamination lithium-ion-power cell fluid injection |
| CN107895815A (en) * | 2017-10-10 | 2018-04-10 | 多氟多（焦作）新能源科技有限公司 | A kind of electrolyte wetting method of soft bag lithium ionic cell |
| CN207765566U (en) * | 2018-01-04 | 2018-08-24 | 宁德新能源科技有限公司 | Battery core immersion equipment |
| CN110896155A (en) * | 2018-09-13 | 2020-03-20 | 深圳格林德能源有限公司 | Process for improving electrolyte infiltration of lithium ion battery |
| CN110783631A (en) * | 2019-10-18 | 2020-02-11 | 淮安骏盛新能源科技有限公司 | Electrolyte infiltration method for lithium battery |
| CN111063857A (en) * | 2019-12-17 | 2020-04-24 | 天津力神电池股份有限公司 | Device and method for standing lithium ion soft package power battery after liquid injection |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018449A (en) * | 2020-08-13 | 2020-12-01 | 昆山聚创新能源科技有限公司 | Manufacturing method and hot-pressing device for lithium battery soft package battery cell |
| CN112768777A (en) * | 2020-12-28 | 2021-05-07 | 蜂巢能源科技有限公司 | Battery interface improving method and battery interface improving system |
| CN112768777B (en) * | 2020-12-28 | 2022-03-22 | 蜂巢能源科技有限公司 | Battery interface improving method and battery interface improving system |
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