A kind of formation method of high-voltage lithium-ion pouch battery
A chemical formation method and soft-pack battery technology, applied in the field of lithium-ion batteries, can solve the problems of easy gas generation and battery flatulence, and achieve the effects of reducing impact, ensuring liquid retention and hardness, and improving electrical performance and safety.
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Embodiment 1
[0029] The formation method of the high-voltage lithium-ion soft pack battery of this embodiment comprises the following steps:
[0030] S1. Put the soft-packed cells that have been injected into the vacuum for 12 hours, and then vacuum seal. This process ensures the full infiltration of the electrolyte and is conducive to the completion of the formation process. Put the sealed cells into the adjustable In the pressure fixture, set the fixture pressure to 0.1MPa, and the temperature is 45°C, charge with the first current of 0.02C to the first cut-off voltage of 3.8v, and leave it for 10min;
[0031] S2. On the basis of step S1, adjust the clamp pressure to 0.05MPa, and at a temperature of 45°C, charge the battery with a second current of 0.05C to a second cut-off voltage of 4.4v, and leave it for 10 minutes;
[0032] S3. On the basis of step S2, adjust the clamp pressure to 0.02MPa, and at a temperature of 55°C, charge with the third current of 0.1C to a full-state voltage of ...
Embodiment 2
[0038] The formation method of the high-voltage lithium-ion soft pack battery of this embodiment comprises the following steps:
[0039] S1. Put the soft-packed cells that have been injected into the vacuum for 12 hours, and then vacuum seal. This process ensures the full infiltration of the electrolyte and is conducive to the completion of the formation process. Put the sealed cells into the adjustable In the pressure fixture, set the fixture pressure to 0.05MPa, and the temperature is 45°C, charge with the first current of 0.02C to the first cut-off voltage of 3.8v, and leave it for 10min;
[0040] S2. On the basis of step S1, adjust the clamp pressure to 0.05MPa, and at a temperature of 45°C, charge with the second current of 0.05C to the second cut-off voltage of 4.2v, and leave for 10min;
[0041] S3. On the basis of step S2, adjust the clamp pressure to 0.02MPa, and at a temperature of 55°C, charge with the third current of 0.1C to a full-state voltage of 4.7v, and leave...
Embodiment 3
[0047] The formation method of the high-voltage lithium-ion soft pack battery of this embodiment comprises the following steps:
[0048] S1. Put the soft-packed battery cells that have been injected into the open vacuum for 8 hours, and then vacuumize the seal. This process ensures the full infiltration of the electrolyte and is conducive to the completion of the formation process. Put the sealed battery cells into the adjustable In the pressure fixture, set the fixture pressure to 0.05MPa and the temperature to 40°C, charge with the first current of 0.01C to the first cut-off voltage of 3.5v, and leave it for 8min;
[0049] S2. On the basis of step S1, adjust the clamp pressure to 0.03MPa, and at a temperature of 40°C, charge with a second current of 0.03C to a second cut-off voltage of 4.2v, and leave for 8 minutes;
[0050] S3. On the basis of step S2, adjust the clamp pressure to 0.01MPa, and at a temperature of 50°C, charge with the third current of 0.05C to a full-state ...
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