A kind of preparation method of lithium ion battery
A lithium-ion battery and battery technology, which is applied in the manufacture of electrolyte batteries, secondary batteries, non-aqueous electrolyte batteries, etc. The effect of eliminating polarization
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Embodiment 1
[0039] 1) the assembled battery is injected into the first electrolyte, the first electrolyte accounts for 78% of the total electrolyte volume, and the organic solvent is dimethyl carbonate in a volume ratio of 1:1:2, ethyl methyl carbonate and the mixed solvent of ethylene carbonate, the electrolyte salt is the lithium hexafluorophosphate of 1.2mol / L, and the sodium carbonate of 70ppm (quality) is contained in the described first electrolyte;
[0040] 2) using a predetermined current and constant current to charge to a first predetermined voltage, and the first predetermined voltage is 3.4V;
[0041] 3) Lower the battery temperature to 3 degrees Celsius, charge the battery with a constant voltage at the first predetermined voltage for 10 minutes, and measure the charging current;
[0042] 4) If the charging current is higher than 0.01C, the pre-formation process is carried out first and then the formation process is carried out; if not, the formation process is directly carri...
Embodiment 2
[0061] 1) the assembled battery is injected into the first electrolyte, the first electrolyte accounts for 78-80% of the total electrolyte volume, and the organic solvent therein is the dimethyl carbonate of a volume ratio of 1:1:2, methyl carbonate A mixed solvent of ethyl ester and ethylene carbonate, the electrolyte salt is 1.2mol / L lithium hexafluorophosphate, and the first electrolyte contains 70ppm (quality) of sodium carbonate;
[0062] 2) using a predetermined current and constant current to charge to a first predetermined voltage, and the first predetermined voltage is 3.4V;
[0063] 3) Lower the battery temperature to 3 degrees Celsius, charge the battery with a constant voltage at the first predetermined voltage for 10 minutes, and measure the charging current;
[0064] 4) If the charging current is higher than 0.01C, the pre-formation process is carried out first and then the formation process is carried out; if not, the formation process is directly carried out; ...
Embodiment 3
[0083] 1) the assembled battery is injected into the first electrolyte, the first electrolyte accounts for 80% of the total electrolyte volume, and the organic solvent therein is dimethyl carbonate with a volume ratio of 1:1:2, ethyl methyl carbonate and the mixed solvent of ethylene carbonate, the electrolyte salt is the lithium hexafluorophosphate of 1.2mol / L, and the sodium carbonate of 75ppm (quality) is contained in the described first electrolyte;
[0084] 2) using a predetermined current and constant current to charge to a first predetermined voltage, where the first predetermined voltage is 3.45V;
[0085] 3) Lower the battery temperature to 4 degrees Celsius, charge with a constant voltage at the first predetermined voltage for 12 minutes, and measure the charging current;
[0086] 4) If the charging current is higher than 0.01C, the pre-formation process is carried out first and then the formation process is carried out; if not, the formation process is directly carr...
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