CN111370792A - Formation method of lithium ion battery - Google Patents
Formation method of lithium ion battery Download PDFInfo
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- CN111370792A CN111370792A CN202010196529.0A CN202010196529A CN111370792A CN 111370792 A CN111370792 A CN 111370792A CN 202010196529 A CN202010196529 A CN 202010196529A CN 111370792 A CN111370792 A CN 111370792A
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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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- 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
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
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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
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
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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
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention provides a formation method of a lithium ion battery, wherein a negative electrode active substance of the lithium ion battery is a graphite material, an electrolyte of the lithium ion battery comprises a lithium salt, an organic solvent and an additive, the organic solvent comprises ethylene carbonate, dimethyl carbonate and propylene carbonate, the additive comprises 1, 2-trifluoroacetoethane, dimethyl sulfoxide and anisole, the formation method comprises the steps of injecting a first electrolyte, and the first electrolyte accounts for 45-50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, and the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8-12% by volume; the organic solvent of the second electrolyte comprises propylene carbonate and dimethyl carbonate, and the additives are dimethyl sulfoxide and anisole, wherein the content of the dimethyl sulfoxide is 3.6-4.0% by volume. The content of the anisole is 0.15 to 0.3 volume percent; and carrying out formation to obtain the battery.
Description
Technical Field
The invention relates to a formation method of a lithium ion battery.
Background
The high temperature stability of the lithium ion battery is one of the safety performance of the lithium ion battery, the selection of the electrolyte is the primary influence factor of the high temperature safety, propylene carbonate is used as cyclic ester, the high temperature safety performance is good when the electrolyte is used as the high temperature electrolyte, but when the cathode adopts a graphite cathode, because the branched chain of the propylene carbonate can be inserted into the interlayer of the graphite material, the interfacial reaction is caused between the electrolyte and the cathode, the cycle life of the battery is influenced, particularly, the service life influence is more obvious under the high temperature environment, and therefore, a scheme capable of overcoming the defect needs to be provided.
Disclosure of Invention
The invention provides a formation method of a lithium ion battery, wherein a negative electrode active substance of the lithium ion battery is a graphite material, an electrolyte of the lithium ion battery comprises a lithium salt, an organic solvent and an additive, the organic solvent comprises ethylene carbonate, dimethyl carbonate and propylene carbonate, the additive comprises 1, 2-trifluoroacetoethane, dimethyl sulfoxide and anisole, the formation method comprises the steps of injecting a first electrolyte, and the first electrolyte accounts for 45-50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, and the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8-12% by volume; performing low potential formation, and then injecting a second electrolyte, wherein the second electrolyte accounts for 50-55% of the total volume of the electrolyte; the organic solvent of the second electrolyte comprises propylene carbonate and dimethyl carbonate, and the additives are dimethyl sulfoxide and anisole, wherein the content of the dimethyl sulfoxide is 3.6-4.0% by volume. The content of the anisole is 0.15 to 0.3 volume percent; and carrying out formation to obtain the battery.
The specific scheme is as follows:
a formation method of a lithium ion battery, wherein a negative electrode active substance of the lithium ion battery is a graphite material, an electrolyte of the lithium ion battery comprises a lithium salt, an organic solvent and an additive, the organic solvent comprises ethylene carbonate, dimethyl carbonate and propylene carbonate, and the additive consists of 1, 2-trifluoroacetoxyethane, dimethyl sulfoxide and anisole, wherein the formation method comprises the steps of injecting a first electrolyte, and the first electrolyte accounts for 45-50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, and the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8-12% by volume; performing low potential formation, and then injecting a second electrolyte, wherein the second electrolyte accounts for 50-55% of the total volume of the electrolyte; the organic solvent of the second electrolyte comprises propylene carbonate and dimethyl carbonate, and the additives are dimethyl sulfoxide and anisole, wherein the content of the dimethyl sulfoxide is 3.6-4.0% by volume. The content of the anisole is 0.15 to 0.3 volume percent; and carrying out formation to obtain the battery.
Further, the formation method comprises the following steps:
1) injecting a first electrolyte into the battery, wherein the first electrolyte accounts for 45-50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, and the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8-12% by volume;
2) charging at constant current to a first preset voltage, and then charging at constant voltage under the voltage until the charging current is lower than the charging cut-off current, wherein the first preset voltage is 2.8-2.85V;
3) performing constant-current charge-discharge cycle between a first preset voltage and a discharge cut-off voltage for a plurality of times;
4) injecting a second electrolyte, and standing, wherein the second electrolyte accounts for 50-55% of the total volume of the electrolyte; the organic solvent of the second electrolyte comprises propylene carbonate and dimethyl carbonate, and the additives are dimethyl sulfoxide and anisole, wherein the content of the dimethyl sulfoxide is 3.6-4.0% by volume. The content of the anisole is 0.15 to 0.3 volume percent;
5) charging the battery at a constant current to a second preset voltage which is 3.05-3.15V, and then charging the battery at a constant voltage under the second preset voltage until the charging current is lower than the charging cut-off current;
6) charging the battery at a constant current to a third preset voltage which is 3.95-4.05V, and then charging the battery at a constant voltage under the voltage until the charging current is lower than the charging cut-off current;
7) pulse charging to a charge cut-off voltage;
8) performing constant current charge-discharge cycle between a charge cut-off voltage and a discharge cut-off voltage;
9) vacuumizing and sealing to obtain the battery.
Furthermore, the organic solvent of the second electrolyte is propylene carbonate and dimethyl carbonate, the content of the propylene carbonate is 50-60 volume percent, and the balance is the dimethyl carbonate.
Further, the first electrolyte accounts for 48 vol% of the total electrolyte, and the content of the 1, 2-trifluoroacetoxyethane in the first electrolyte is 10 vol%.
Further, the content of the dimethyl sulfoxide in the second electrolyte solution was 3.8% by volume. The anisole content was 0.2% by volume.
Further, the positive active material is selected from lithium cobaltate, lithium manganate, lithium nickelate, lithium nickel cobalt manganate, lithium iron phosphate, lithium manganese phosphate, lithium vanadium phosphate, and modified substances thereof.
Further, the negative active material is selected from artificial graphite, natural graphite and a mixture thereof.
Further, the lithium ion battery is prepared by the method.
The invention has the following beneficial effects:
1) the inventor finds that 1, 2-trifluoroacetate ethane can be decomposed to form a film on the surface of the graphite negative electrode at an extremely low potential, so that the intercalation reaction of the PC electrolyte to the graphite negative electrode in a high-temperature environment is inhibited, and the stability of the graphite negative electrode in the electrolyte is improved.
2) When the additive contains 1, 2-trifluoroacetyl ethane, dimethyl sulfoxide and anisole, the cycle performance of the battery is greatly improved.
3) According to the charge and discharge method designed by the electrolyte components, the additive 1, 2-trifluoroacetate ethane is contained in the first electrolyte, a stable SEI film is formed on the surface of a negative electrode by low-current formation at a low potential, then the second electrolyte containing PC and the other two additives is injected, and the second electrolyte is subjected to constant-voltage formation at appropriate decomposition potentials of the two additives respectively, so that the stable SEI film is formed, and the cycle performance of the battery is improved.
4) The pulse charging is carried out to the charging cut-off voltage, so that concentration polarization is relieved, and constant voltage formation under the charging cut-off voltage can be omitted after the pulse charging mode, so that decomposition of electrolyte under high voltage is avoided, and the cycle life of the battery is prolonged.
Detailed Description
The present invention will be described in more detail below with reference to specific examples, but the scope of the present invention is not limited to these examples.
The active material of the positive electrode is a lithium cobaltate material; the active material of the negative electrode is natural graphite; LiPF with conductive lithium salt of electrolyte being 1mol/L6。
Example 1
1) Injecting a first electrolyte into the battery, wherein the first electrolyte accounts for 45% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 12% by volume;
2) charging to 2.8V at constant current of 0.02C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
3) performing constant current charge and discharge at 0.02C between 2.8V and 2.7V for 5 times;
4) injecting a second electrolyte, and standing for 1h, wherein the second electrolyte accounts for 55% by volume of the total electrolyte; the organic solvent of the second electrolyte is propylene carbonate and dimethyl carbonate, the content of the propylene carbonate is 50% by volume, the rest is the dimethyl carbonate, the additive is dimethyl sulfoxide and anisole, the content of the dimethyl sulfoxide is 3.6% by volume, and the content of the anisole is 0.15% by volume;
5) charging to 3.05V at constant current of 0.05C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
6) charging to 3.95V at 0.05C constant current, and then charging at constant voltage until the charging current is lower than 0.01C; (ii) a
7) The pulse charging is carried out to 4.2V, the current of the pulse charging is 0.05C, and the pulse time is 200 s. The interval is 5 s;
8) performing constant current charge and discharge at 0.1C for 3 times between 2.7V and 4.2V;
9) vacuumizing and sealing to obtain the battery.
Example 2
1) Injecting a first electrolyte into the battery, wherein the first electrolyte accounts for 50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8 volume percent;
2) charging to 2.85V at 0.02C constant current, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
3) performing constant current charge and discharge at 0.02C between 2.85V and 2.7V for 5 times;
4) injecting a second electrolyte, and standing for 1h, wherein the second electrolyte accounts for 50% of the total volume of the electrolyte; the organic solvent of the second electrolyte is propylene carbonate and dimethyl carbonate, the content of the propylene carbonate is 60% by volume, the rest is dimethyl carbonate, the additive is dimethyl sulfoxide and anisole, the content of the dimethyl sulfoxide is 4.0% by volume, and the content of the anisole is 0.3% by volume;
5) charging to 3.15V at constant current of 0.05C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
6) charging to 4.05V at constant current of 0.05C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C; (ii) a
7) The pulse charging is carried out to 4.2V, the current of the pulse charging is 0.05C, and the pulse time is 200 s. The interval is 5 s;
8) performing constant current charge and discharge at 0.1C for 3 times between 2.7V and 4.2V;
9) vacuumizing and sealing to obtain the battery.
Example 3
1) Injecting a first electrolyte into the battery, wherein the first electrolyte accounts for 48% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 10 volume percent;
2) charging to 2.82V at constant current of 0.02C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
3) performing constant current charge and discharge at 0.02C between 2.82V and 2.7V for 5 times;
4) injecting a second electrolyte, and standing for 1h, wherein the second electrolyte accounts for 52% of the total volume of the electrolyte; the organic solvent of the second electrolyte is propylene carbonate and dimethyl carbonate, the content of the propylene carbonate is 55 volume percent, the rest is the dimethyl carbonate, the additive is dimethyl sulfoxide and anisole, the content of the dimethyl sulfoxide is 3.8 volume percent, and the content of the anisole is 0.2 volume percent;
5) charging to 3.1V at constant current of 0.05C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
6) charging to 4V at constant current of 0.05C, and then charging at constant voltage until the charging current is lower than 0.01C; (ii) a
7) The pulse charging is carried out to 4.2V, the current of the pulse charging is 0.05C, and the pulse time is 200 s. The interval is 5 s;
8) performing constant current charge and discharge at 0.1C for 3 times between 2.7V and 4.2V;
9) vacuumizing and sealing to obtain the battery.
Comparative example 1
1) Injecting a first electrolyte and a second electrolyte into the battery, wherein the first electrolyte accounts for 48% of the total volume of the electrolytes; the organic solvent of the first electrolyte is ethylene carbonate, the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 10 volume percent; the second electrolyte accounts for 52 volume percent of the total electrolyte; the organic solvent of the second electrolyte is propylene carbonate and dimethyl carbonate, the content of the propylene carbonate is 55 volume percent, the rest is the dimethyl carbonate, the additive is dimethyl sulfoxide and anisole, the content of the dimethyl sulfoxide is 3.8 volume percent, and the content of the anisole is 0.2 volume percent;
2) charging to 2.82V at constant current of 0.02C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
3) performing constant current charge and discharge at 0.02C between 2.82V and 2.7V for 5 times;
4) charging to 3.1V at constant current of 0.05C, and then charging at constant voltage under the voltage until the charging current is lower than 0.01C;
5) charging to 4V at constant current of 0.05C, and then charging at constant voltage until the charging current is lower than 0.01C; (ii) a
6) The pulse charging is carried out to 4.2V, the current of the pulse charging is 0.05C, and the pulse time is 200 s. The interval is 5 s;
7) performing constant current charge and discharge at 0.1C for 3 times between 2.7V and 4.2V;
8) vacuumizing and sealing to obtain the battery.
Comparative example 2
1) Injecting a first electrolyte into the battery, wherein the first electrolyte accounts for 48% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 10 volume percent;
2) performing constant current charge and discharge at 0.02C between 4.2V and 2.7V for 3 times;
3) injecting a second electrolyte, and standing for 1h, wherein the second electrolyte accounts for 52% of the total volume of the electrolyte; the organic solvent of the second electrolyte is propylene carbonate and dimethyl carbonate, the content of the propylene carbonate is 55 volume percent, the rest is the dimethyl carbonate, the additive is dimethyl sulfoxide and anisole, the content of the dimethyl sulfoxide is 3.8 volume percent, and the content of the anisole is 0.2 volume percent;
4) performing constant current charge and discharge at 0.1C for 3 times between 2.7V and 4.2V;
5) vacuumizing and sealing to obtain the battery.
Comparative example 3
The second electrolyte contained no additives and the other process parameters were the same as in example 3.
Comparative example 4
The first electrolyte contained no additives and the other process parameters were the same as in example 3.
Comparative example 5
The second electrolyte does not contain anisole, and other process parameters are the same as those of the embodiment 3.
Experiment and data
The batteries obtained according to the preparation methods of examples 1 to 3 and comparative examples 1 to 5, respectively, were then cycled 200 times at normal and high temperatures of 50 ℃ to calculate capacity retention rates, and the results are shown in the following tables. As can be seen from table 1, the combination of the three additives has a great promoting effect on improving the high-temperature performance of the battery, and the formation method has a great promoting effect on both the normal-temperature performance and the high-temperature performance.
TABLE 1
| Ambient temperature (%) | High temperature (%) | |
| Example 1 | 98.9 | 97.5 |
| Example 2 | 99.1 | 97.1 |
| Example 3 | 99.0 | 97.8 |
| Comparative example 1 | 96.2 | 93.5 |
| Comparative example 2 | 97.4 | 94.3 |
| Comparative example 3 | 95.3 | 92.2 |
| Comparative example 4 | 96.9 | 89.5 |
| Comparative example 5 | 95.3 | 90.6 |
While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention.
Claims (8)
1. A formation method of a lithium ion battery, wherein a negative electrode active substance of the lithium ion battery is a graphite material, an electrolyte of the lithium ion battery comprises a lithium salt, an organic solvent and an additive, the organic solvent comprises ethylene carbonate, dimethyl carbonate and propylene carbonate, and the additive consists of 1, 2-trifluoroacetoxyethane, dimethyl sulfoxide and anisole, wherein the formation method comprises the steps of injecting a first electrolyte, and the first electrolyte accounts for 45-50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, and the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8-12% by volume; performing low potential formation, and then injecting a second electrolyte, wherein the second electrolyte accounts for 50-55% of the total volume of the electrolyte; the organic solvent of the second electrolyte comprises propylene carbonate and dimethyl carbonate, and the additives are dimethyl sulfoxide and anisole, wherein the content of the dimethyl sulfoxide is 3.6-4.0% by volume. The content of the anisole is 0.15 to 0.3 volume percent; and carrying out formation to obtain the battery.
2. The formation method according to claim 1, comprising:
1) injecting a first electrolyte into the battery, wherein the first electrolyte accounts for 45-50% of the total volume of the electrolyte; the organic solvent of the first electrolyte is ethylene carbonate, and the additive is 1, 2-trifluoroacetoxyethane, and the content of the additive is 8-12% by volume;
2) charging at constant current to a first preset voltage, and then charging at constant voltage under the voltage until the charging current is lower than the charging cut-off current, wherein the first preset voltage is 2.8-2.85V;
3) performing constant-current charge-discharge cycle between a first preset voltage and a discharge cut-off voltage for a plurality of times;
4) injecting a second electrolyte, and standing, wherein the second electrolyte accounts for 50-55% of the total volume of the electrolyte; the organic solvent of the second electrolyte comprises propylene carbonate and dimethyl carbonate, and the additives are dimethyl sulfoxide and anisole, wherein the content of the dimethyl sulfoxide is 3.6-4.0% by volume. The content of the anisole is 0.15 to 0.3 volume percent;
5) charging the battery at a constant current to a second preset voltage which is 3.05-3.15V, and then charging the battery at a constant voltage under the second preset voltage until the charging current is lower than the charging cut-off current;
6) charging the battery at a constant current to a third preset voltage which is 3.95-4.05V, and then charging the battery at a constant voltage under the voltage until the charging current is lower than the charging cut-off current;
7) pulse charging to a charge cut-off voltage;
8) performing constant current charge-discharge cycle between a charge cut-off voltage and a discharge cut-off voltage;
9) vacuumizing and sealing to obtain the battery.
3. The method of the preceding claim, the organic solvent of the second electrolyte being propylene carbonate and dimethyl carbonate, the propylene carbonate content being 50-60% by volume, the remainder being dimethyl carbonate.
4. The method according to the preceding claim, wherein the first electrolyte is 48 vol.% of the total electrolyte and the 1, 2-trifluoroacetoxyethane content of the first electrolyte is 10 vol.%.
5. The method according to the preceding claim, wherein the dimethyl sulfoxide content of the second electrolyte is 3.8 vol%. The anisole content was 0.2% by volume.
6. The method of the preceding claim, wherein the positive active material is selected from the group consisting of lithium cobaltate, lithium manganate, lithium nickelate, lithium nickel cobalt manganate, lithium iron phosphate, lithium manganese phosphate, lithium vanadium phosphate, and modified materials thereof.
7. The method of the preceding claim, wherein the negative active material is selected from the group consisting of artificial graphite, natural graphite, and mixtures thereof.
8. A lithium ion battery prepared by the method of any one of claims 1-7.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103581A (en) * | 2020-09-30 | 2020-12-18 | 苏州精诚智造智能科技有限公司 | Preparation method of lithium ion battery |
| CN112164786A (en) * | 2020-09-14 | 2021-01-01 | 苏州极闪控电信息技术有限公司 | Preparation method of lithium vanadium phosphate lithium ion battery |
| CN112186259A (en) * | 2020-09-28 | 2021-01-05 | 苏州酷卡环保科技有限公司 | Preparation method of power lithium ion battery |
| CN112201871A (en) * | 2020-10-22 | 2021-01-08 | 苏州极闪控电信息技术有限公司 | High-temperature formation method of lithium ion battery |
| CN114171800A (en) * | 2021-11-24 | 2022-03-11 | 蜂巢能源科技有限公司 | Lithium supplement battery and preparation method thereof |
| CN116454564A (en) * | 2023-06-20 | 2023-07-18 | 江苏正力新能电池技术有限公司 | Secondary liquid injection method, battery and electric equipment |
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2020
- 2020-03-19 CN CN202010196529.0A patent/CN111370792A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112164786A (en) * | 2020-09-14 | 2021-01-01 | 苏州极闪控电信息技术有限公司 | Preparation method of lithium vanadium phosphate lithium ion battery |
| CN112186259A (en) * | 2020-09-28 | 2021-01-05 | 苏州酷卡环保科技有限公司 | Preparation method of power lithium ion battery |
| CN112103581A (en) * | 2020-09-30 | 2020-12-18 | 苏州精诚智造智能科技有限公司 | Preparation method of lithium ion battery |
| CN112201871A (en) * | 2020-10-22 | 2021-01-08 | 苏州极闪控电信息技术有限公司 | High-temperature formation method of lithium ion battery |
| CN114171800A (en) * | 2021-11-24 | 2022-03-11 | 蜂巢能源科技有限公司 | Lithium supplement battery and preparation method thereof |
| CN116454564A (en) * | 2023-06-20 | 2023-07-18 | 江苏正力新能电池技术有限公司 | Secondary liquid injection method, battery and electric equipment |
| CN116454564B (en) * | 2023-06-20 | 2023-09-08 | 江苏正力新能电池技术有限公司 | Secondary liquid injection method, battery and electric equipment |
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