Rapid formation and capacity grading method for soft package battery using high-voltage electrolyte

[0029] Example one:

[0030] 1: The electrolyte used in this high-voltage soft pack battery contains 1.5% of the film-forming agent hexafluoroisopropanol and 1.5% of the stabilizer hexamethyldisilazane;

[0031] 2: In an environment where the dew point is less than -45°C, the electrolyte with the above characteristics is injected and sealed, and then aged at a temperature of 60°C for 96h;

[0032] 3: After taking it out and cooling it to room temperature, it is air-sealed according to the conventional process;

[0033] 4: At a pressure of 2.0Kg / cm2 and a temperature of 38°C, the chemical conversion is performed first. The chemical conversion process is: the current of the first step of constant current charging is 0.01C, and the protection termination voltage is 3.5V; the second step of constant current charging current 0.1C, the protection termination voltage is 4.1V; the current of the third step of constant current charging is 0.3C, and the protection termination voltage is 5.0V;

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[0036] Embodiment two:

[0037] 1: The electrolyte used in this high-voltage soft-pack battery contains 3% film-forming agent hexafluoroisopropanol and 2.5% stabilizer hexamethyldisilazane;

[0038] 2: In an environment where the dew point is less than -45°C, the electrolyte with the above characteristics is injected and sealed, and then aged at a temperature of 60°C for 108 hours;

[0039] 3: After taking it out and cooling it to room temperature, it is air-sealed according to the conventional process;

[0040] 4: At a pressure of 2.5Kg / cm2 and a temperature of 45°C, the chemical conversion is carried out first. The chemical conversion process is: the current of the first step constant current charging is 0.01C, and the protection termination voltage is 3.5V; the second step of constant current charging current 0.1C, the protection termination voltage is 4.1V; the current of the third step of constant current charging is 0.3C, and the protection termination voltage is 5.0V;

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