CN109560337A - A kind of chemical synthesizing method of lithium ion battery - Google Patents
A kind of chemical synthesizing method of lithium ion battery Download PDFInfo
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- CN109560337A CN109560337A CN201811199096.3A CN201811199096A CN109560337A CN 109560337 A CN109560337 A CN 109560337A CN 201811199096 A CN201811199096 A CN 201811199096A CN 109560337 A CN109560337 A CN 109560337A
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- 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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/446—Initial charging measures
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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
Abstract
The present invention relates to field of lithium ion battery, and in particular to a kind of chemical synthesizing method of lithium ion battery.The chemical synthesizing method of lithium ion battery of the invention includes the following steps, in 50-70 DEG C of environment, lithium ion battery to be changed is shelved 8~12 minutes, progress first time constant-current charge, 0.05~0.15C of electric current, the time 40~70 minutes, 3.7~4.2V of upper limit voltage, 0.05~0.35MPa of pressure；It shelves 3~8 minutes, carries out second of constant-current charge；It shelves 3~7 minutes, carries out third time constant-current charge；It shelves 5 minutes, terminates chemical conversion.The chemical synthesizing method of lithium ion battery of the invention effectively shortens the chemical conversion time, improves chemical synthesis technology efficiency, improves SEI membrane stability, improves the cycle performance of lithium ion battery, improve the high rate performance of lithium ion battery, reduce lithium ion battery self discharge rate.
Description
Technical field
The invention belongs to field of lithium ion battery, and in particular to a kind of method of lithium ion battery.
Background technique
As petroleum-based energy becomes closer to exhaustion, problem of environmental pollution is increasingly severe, and the use of new energy is just more
Attraction people sight.The lithium ion battery of one of new energy has high-energy density, high voltage, low self-discharge, memoryless
It is the advantages that effect, long circulation life, more and more in industrial applications such as 3C electric consumers, electric vehicles.In automobile industry, electricity
Motor-car is the development trend of new-energy automobile, and power core of the lithium ion battery as electric vehicle determines the performance of electric vehicle,
But the key indexes such as the manufacturing cost of lithium ion battery, cycle performance, seriously restrict the development of lithium ion battery.
The critical process of the manufacturing cost and cycle performance that influence lithium ion battery is exactly formation process.Formation process can
The positive and negative anodes active material of activation lithium ion battery is chemically reacted, while electrolyte film forming component is formed admittedly in negative terminal surface
Body electrolyte interface film (SEI film),
SEI film is the excellence conductor of Li+, and lithium ion free shuttling wherein can be allowed to carry out embedding de- into negative terminal surface
Lithium work, while being good electronic body again, the total insertion of solvent molecule can be effectively prevented, is avoided because solvent molecule is total
Insertion damages electrode material, greatly improves the cycle performance of battery；Other manufacturing processes of opposite lithium ion battery, pass
The chemical synthesis technology of system is comparatively time-consuming long.
The Chinese invention of publication No. CN107732314A, which is applied for a patent, discloses a kind of improvement cycle performance of lithium ion battery
Quick formation processing method, when needing to apply higher pressure in the main surface of battery in entire formation process, and being melted into
Between it is partially long, and high pressure chemical conversion always is unfavorable for the formation of stable SEI film.
How can be shortened the lithium ion battery formation process time, while optimizing the stability of SEI film, improves lithium ion battery
Cycle life be the problem of concern by industry always.
Summary of the invention
(1) technical problem to be solved
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of chemical synthesizing method of lithium ion battery, chemical conversions
Activity time is short, and the SEI film of formation is stablized, and cycle life is improved, and improves the high rate performance of lithium ion battery, reduces lithium-ion electric
Pond self-discharge rate, and without applying higher pressure in entire formation process.
(2) technical solution
To achieve the goals above, the present invention uses following scheme:
A kind of chemical synthesizing method of lithium ion battery, includes the following steps, formation process is carried out in 50-70 DEG C of environment, to
The lithium ion battery of chemical conversion is shelved 8~12 minutes, and first time constant-current charge, 0.05~0.15C of charging current, charging time are carried out
40~70 minutes, charging upper limit 3.7~4.2V of voltage, charged 0.05~0.35MPa of pressure；It shelves 3~8 minutes, carries out second
Secondary constant-current charge, 0.2~0.4C of charging current, the charging time 12~25 minutes, charging upper limit 3.7~4.2V of voltage, charging voltage
0.05~0.35MPa of power；It shelves 3~7 minutes, carries out third time constant-current charge, 0.4~0.7C of charging current, charging time 60
~100 minutes, charging upper limit 3.7~4.2V of voltage, charged 0.5~0.8MPa of pressure；It shelves 5 minutes, terminates chemical conversion.
Preferably, described steps are as follows, and formation process is carried out in 55-65 DEG C of environment, and lithium ion battery to be changed is put
It sets 9~11 minutes, progress first time constant-current charge, 0.08~0.13C of charging current, the charging time 50~65 minutes, in charging
3.8~4.0V of voltage limit, charge 0.1~0.3MPa of pressure；It shelves 4~7 minutes, carries out second of constant-current charge, charging current
0.25~0.35C, the charging time 15~23 minutes, charging upper limit 3.8~4.0V of voltage, charged 0.1~0.3MPa of pressure；It shelves
4~6 minutes, third time constant-current charge is carried out, 0.45~0.6C of charging current, the charging time 70~90 minutes, charging upper limit was electric
3.8~4.0V is pressed, charge 0.55~0.7MPa of pressure；It shelves 5 minutes, terminates chemical conversion.
It is furthermore preferred that described, steps are as follows, and formation process is carried out in 60 DEG C of environment, and lithium ion battery to be changed is shelved
10 minutes, progress first time constant-current charge, charging current 0.1C, the charging time 60 minutes, charging upper limit voltage 3.9V, charging voltage
Power 0.2MPa；It shelves 5 minutes, carries out second of constant-current charge, charging current 0.3C, the charging time 20 minutes, charging upper limit was electric
3.9V is pressed, charge pressure 0.2MPa；It shelves 5 minutes, carries out third time constant-current charge, charging current 0.5C, the charging time 80 divides
Clock, charging upper limit voltage 3.9V, charge pressure 0.6MPa；It shelves 5 minutes, terminates chemical conversion.
(3) beneficial effect
Compared to the prior art, the present invention is with following the utility model has the advantages that (1) shortening chemical conversion time, improves production efficiency；
(2) SEI membrane stability is improved；(3) improve the cycle performance of lithium ion battery；(4) simple process, it is easy to operate.
Detailed description of the invention
Cycle-index -- capacity curve figure of the Fig. 1 for the embodiment of the present invention 2 and the lithium ion battery of comparative example at 55 DEG C.
Fig. 2 be the lithium ion battery of the embodiment of the present invention 2 and comparative example temperature -- discharge capacity compares curve graph.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, by embodiment to the present invention carry out into
One step elaborates, but is not intended to limit the present invention.
Embodiment 1
Formation process is carried out in 52 DEG C of environment, lithium ion battery to be changed is shelved 8 minutes, is carried out first time constant current and is filled
Electricity, charging current 0.06C, the charging time 43 minutes, charging upper limit voltage 3.7V, charged pressure 0.08MPa；It shelves 3 minutes, into
Second of constant-current charge of row, charging current 0.2C, the charging time 13 minutes, charging upper limit voltage 3.7V, charged pressure
0.07MPa；It shelves 3 minutes, carries out third time constant-current charge, charging current 0.4C, the charging time 100 minutes, charging upper limit was electric
4.2V is pressed, charge pressure 0.8MPa；It shelves 5 minutes, terminates chemical conversion.
Embodiment 2
Formation process is carried out in 60 DEG C of environment, lithium ion battery to be changed is shelved 10 minutes, is carried out permanent for the first time
Current charge, charging current 0.1C, the charging time 60 minutes, charging upper limit voltage 3.9V, charged pressure 0.2MPa；It shelves 5 minutes,
Second of constant-current charge is carried out, charging current 0.3C, the charging time 20 minutes, charging upper limit voltage 3.9V, charged pressure
0.2MPa；It shelves 5 minutes, progress third time constant-current charge, charging current 0.5C, the charging time 80 minutes, charging upper limit voltage
3.9V, charge pressure 0.6MPa；It shelves 5 minutes, terminates chemical conversion.
Embodiment 3
Formation process is carried out in 68 DEG C of environment, lithium ion battery to be changed is shelved 12 minutes, and first time constant current is carried out
Charging, charging current 0.15C, the charging time 70 minutes, charging upper limit voltage 4.2V, charged pressure 0.35MPa；It shelves 8 minutes,
Second of constant-current charge is carried out, charging current 0.4C, the charging time 25 minutes, charging upper limit voltage 4.2V, charged pressure
0.35MPa；It shelves 7 minutes, progress third time constant-current charge, charging current 0.7C, the charging time 60 minutes, charging upper limit voltage
3.7V, charge pressure 0.5MPa；It shelves 5 minutes, terminates chemical conversion.
Embodiment 4
Formation process is carried out in 58 DEG C of environment, lithium ion battery to be changed is shelved 10 minutes, and first time constant current is carried out
Charging, charging current 0.12C, the charging time 58 minutes, charging upper limit voltage 3.8V, charged pressure 0.2MPa；It shelves 5 minutes,
Second of constant-current charge is carried out, charging current 0.32C, the charging time 18 minutes, charging upper limit voltage 3.8V, charged pressure
0.2MPa；It shelves 5 minutes, progress third time constant-current charge, charging current 0.55C, the charging time 75 minutes, charging upper limit voltage
4.0V, charge pressure 0.62MPa；It shelves 5 minutes, terminates chemical conversion.
Comparative example
Conventional formation of Li-ion batteries method: formation process is carried out in 50 DEG C of environment, lithium ion battery to be changed is shelved
10 minutes, first time constant-current charge is carried out, charging current 0.02C the charging time 90 minutes, charging upper limit voltage 3.9V, charges
Pressure 0.4MPa；It shelves 5 minutes, second of constant-current charge of progress, charging current 0.1C, the charging time 60 minutes, charging upper limit
Voltage 3.9V, charge pressure 0.4MPa；It shelves 5 minutes, carries out third time constant-current charge, charging current 0.5C, charging time 85
Minute, charging upper limit voltage 3.9V, charge pressure 0.4MPa；It shelves 5 minutes, terminates chemical conversion.
Performance comparison
The chemical synthesizing method total time and cycle performance comparison of embodiment 1-4 and comparative example are as shown in table 1.
The chemical synthesizing method total time of the different embodiments of table 1 and cycle performance comparison
From the results shown in Table 1, it is compared with conventional formation of Li-ion batteries method, formation of Li-ion batteries method of the invention
It can be shortened the formation process time 70~80 minutes, the time shortens a quarter or more, effectively improves process efficiency, reduction production
Cost, and it is obviously improved the cycle life of battery.
Electric discharge internal resistance and discharge energy density comparison when 50% battery remaining power (SOC) of embodiment 2 and comparative example,
The results are shown in Table 2.
The electric discharge internal resistance of table 2 and discharge energy density comparison
From the results shown in Table 2, using compound method for lithium ion battery of the invention than conventional chemical synthesizing method energy
The DC impedance (DCR) and power density for improving lithium ion battery, improve the high rate performance of lithium ion battery.
Overdischarge capacity comparison of the lithium ion battery of embodiment 2 and comparative example under different discharge voltages such as 3 institute of table
Show.
Overdischarge capacity comparison under the different discharge voltages of table 3
Over-discharge capacitance is higher, and SEI film is more unstable.From the results shown in Table 3, using lithium-ion electric of the invention
Pond chemical synthesizing method can generate more stable SEI film than conventional chemical synthesizing method.
Battery performance after the lithium ion battery of embodiment 2 and comparative example stores 7 days at 55 DEG C is as shown in table 4.
4 embodiment 2 of table and comparative example are in 55 DEG C of battery performances after high-temperature storage 7 days
| Embodiment | Pressure drop/V | Capacity retention ratio/% | Capacity response rate/% |
| Embodiment 2 | 0.043 | 97.67 | 100.42 |
| Comparative example | 0.045 | 96.73 | 99.97 |
From the results shown in Table 4, using compound method for lithium ion battery of the invention than conventional chemical synthesizing method energy
Improve the high-temperature storage performance of lithium ion battery, reduce self-discharge rate, improves capacity retention ratio.
In conclusion performance is more preferable after lithium ion battery chemical conversion, and service life can be more using chemical synthesizing method of the invention
It is long.
It should be noted that embodiment disclosed above only embodies and illustrates technical solution of the present invention, rather than it is used to limit this
The protection scope of invention, although explaining in detail referring to preferred embodiment to the present invention, any those skilled in the art is answered
Work as understanding, modify within the scope of technical solution of the present invention or various change, equivalent replacement not departing from, this all should belong to
The protection scope of invention.
Claims (3)
1. a kind of chemical synthesizing method of lithium ion battery, it is characterised in that: include the following steps, changed in 50-70 DEG C of environment
At process, lithium ion battery to be changed is shelved 8~12 minutes, progress first time constant-current charge, and charging current 0.05~
0.15C, the charging time 40~70 minutes, charging upper limit 3.7~4.2V of voltage, charged 0.05~0.35MPa of pressure；Shelve 3~8
Minute, second of constant-current charge of progress, 0.2~0.4C of charging current, the charging time 12~25 minutes, charging upper limit voltage 3.7
~4.2V, charge 0.05~0.35MPa of pressure；It shelves 3~7 minutes, progress third time constant-current charge, charging current 0.4~
0.7C, the charging time 60~100 minutes, charging upper limit 3.7~4.2V of voltage, charged 0.5~0.8MPa of pressure；It shelves 5 minutes,
Terminate chemical conversion.
2. the chemical synthesizing method of lithium ion battery according to claim 1, it is characterised in that: described steps are as follows, in 55-65
Formation process is carried out in DEG C environment, lithium ion battery to be changed is shelved 9~11 minutes, and first time constant-current charge, charging are carried out
0.08~0.13C of electric current, the charging time 50~65 minutes, charging upper limit 3.8~4.0V of voltage, charged 0.1~0.3MPa of pressure；
It shelves 4~7 minutes, second of constant-current charge of progress, 0.25~0.35C of charging current, the charging time 15~23 minutes, in charging
3.8~4.0V of voltage limit, charge 0.1~0.3MPa of pressure；It shelves 4~6 minutes, carries out third time constant-current charge, charging current
0.45~0.6C, the charging time 70~90 minutes, charging upper limit 3.8~4.0V of voltage, charged 0.55~0.7MPa of pressure；It shelves
5 minutes, terminate chemical conversion.
3. the chemical synthesizing method of lithium ion battery according to claim 2, it is characterised in that: described steps are as follows, at 60 DEG C
Formation process is carried out in environment, lithium ion battery to be changed is shelved 10 minutes, and first time constant-current charge, charging current are carried out
0.1C, the charging time 60 minutes, charging upper limit voltage 3.9V, charged pressure 0.2MPa；It shelves 5 minutes, carries out second of constant current
Charging, charging current 0.3C, the charging time 20 minutes, charging upper limit voltage 3.9V, charged pressure 0.2MPa；It shelves 5 minutes, into
Row third time constant-current charge, charging current 0.5C, the charging time 80 minutes, charging upper limit voltage 3.9V, charged pressure 0.6MPa；
It shelves 5 minutes, terminates chemical conversion.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110518301A (en) * | 2019-08-05 | 2019-11-29 | 东莞维科电池有限公司 | A kind of soft bag lithium ionic cell chemical synthesizing method |
| CN111987363A (en) * | 2019-05-21 | 2020-11-24 | 万向一二三股份公司 | Formation method of lithium ion battery |
| CN112582697A (en) * | 2020-12-15 | 2021-03-30 | 东莞维科电池有限公司 | Formation method of lithium ion battery |
| CN112820945A (en) * | 2021-01-18 | 2021-05-18 | 贵州扬德新能源科技有限公司 | Method for improving liquid retention coefficient of polymer lithium ion battery |
| CN113078363A (en) * | 2021-02-22 | 2021-07-06 | 天津力神电池股份有限公司 | Method for prolonging cycle life of lithium ion battery |
| CN114039099A (en) * | 2021-11-02 | 2022-02-11 | 远景动力技术(江苏)有限公司 | Formation method and application of lithium ion battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996657A (en) * | 2006-01-06 | 2007-07-11 | 深圳市雄韬电源科技有限公司 | Formation method for the seal of the lithium ion battery |
| CN105406130A (en) * | 2015-11-30 | 2016-03-16 | 山东精工电子科技有限公司 | Soft package lithium-ion battery formation method |
| CN106299461A (en) * | 2016-09-20 | 2017-01-04 | 东莞锂威能源科技有限公司 | A kind of high energy density lithium ion battery core chemical synthesis technology |
| CN106684426A (en) * | 2016-12-29 | 2017-05-17 | 多氟多（焦作）新能源科技有限公司 | Formation method of softly-packed lithium ion battery |
| CN108110350A (en) * | 2017-12-18 | 2018-06-01 | 惠州Tcl金能电池有限公司 | Lithium ion battery pressure chemical synthesizing method |
-
2018
- 2018-10-15 CN CN201811199096.3A patent/CN109560337A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996657A (en) * | 2006-01-06 | 2007-07-11 | 深圳市雄韬电源科技有限公司 | Formation method for the seal of the lithium ion battery |
| CN105406130A (en) * | 2015-11-30 | 2016-03-16 | 山东精工电子科技有限公司 | Soft package lithium-ion battery formation method |
| CN106299461A (en) * | 2016-09-20 | 2017-01-04 | 东莞锂威能源科技有限公司 | A kind of high energy density lithium ion battery core chemical synthesis technology |
| CN106684426A (en) * | 2016-12-29 | 2017-05-17 | 多氟多（焦作）新能源科技有限公司 | Formation method of softly-packed lithium ion battery |
| CN108110350A (en) * | 2017-12-18 | 2018-06-01 | 惠州Tcl金能电池有限公司 | Lithium ion battery pressure chemical synthesizing method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987363A (en) * | 2019-05-21 | 2020-11-24 | 万向一二三股份公司 | Formation method of lithium ion battery |
| CN110518301A (en) * | 2019-08-05 | 2019-11-29 | 东莞维科电池有限公司 | A kind of soft bag lithium ionic cell chemical synthesizing method |
| CN112582697A (en) * | 2020-12-15 | 2021-03-30 | 东莞维科电池有限公司 | Formation method of lithium ion battery |
| CN112820945A (en) * | 2021-01-18 | 2021-05-18 | 贵州扬德新能源科技有限公司 | Method for improving liquid retention coefficient of polymer lithium ion battery |
| CN113078363A (en) * | 2021-02-22 | 2021-07-06 | 天津力神电池股份有限公司 | Method for prolonging cycle life of lithium ion battery |
| CN114039099A (en) * | 2021-11-02 | 2022-02-11 | 远景动力技术(江苏)有限公司 | Formation method and application of lithium ion battery |
| CN114039099B (en) * | 2021-11-02 | 2023-06-30 | 远景动力技术(江苏)有限公司 | Lithium ion battery formation method and application thereof |
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