Novel control method for improving lithium ion soft-package laminated battery diaphragm fold
A battery separator and control method technology, applied in secondary batteries, battery pack parts, secondary battery charging/discharging, etc. problem, to achieve a good interface effect, ensure performance, and ensure the effect of no wrinkles
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Embodiment 1)
[0028] See figure 1 with figure 2 , a novel control method for improving the wrinkle of lithium-ion pouch laminated battery diaphragm, comprising the following steps:
[0029] Step 1: Put the battery aside after filling it. After liquid injection and side sealing, the battery is placed at a high temperature of 45°C for 24 hours, and then transferred to normal temperature for 24 hours to ensure sufficient wetting of the pole pieces.
[0030] Step 2: Roll pressing before battery pre-charging. Use the transmission method to roll the shelved battery, adjust the pressure and speed of the rolling process, the pressure is 0.05MPa, and the rolling speed is 1m / s. When the battery is placed, the bottom is parallel to the pressing roller. For details, refer to figure 1 shown;
[0031] Step 3: Then pre-charge the rolled battery. The pre-charging process is consistent with the pre-charging process of industrially produced lithium-ion batteries. The pre-charging rate is 0.01C, 0.05C, 0...
Embodiment 2)
[0035] Step 1: Put the battery aside after filling it. After liquid injection and side sealing, the battery is placed at a high temperature of 45°C for 36 hours, and then transferred to room temperature for 12 hours to ensure sufficient wetting of the pole pieces.
[0036] Step 2: Roll pressing before battery pre-charging. Use the transmission method to roll the shelved battery, adjust the pressure and speed of the rolling process, the pressure is 0.3MPa, and the rolling speed is 2 m / s. When the battery is placed, the bottom is parallel to the pressure roller. Specifically refer to figure 1 shown;
[0037] Step 3: Then pre-charge the rolled battery. The pre-charging process is consistent with the pre-charging process of industrially produced lithium-ion batteries. The pre-charging rate is 0.01C, 0.05C, 0.1C, 0.2C;
[0038] Step 4: During the prefilling process, some gas will be generated due to the formation of the SEI film. The diaphragm is further shaped and exhausted by ...
Embodiment 3)
[0041] Step 1: Put the battery aside after filling it. After liquid injection and side sealing, the battery is placed at a high temperature of 45°C for 36 hours, and then transferred to room temperature for 24 hours to ensure sufficient wetting of the pole pieces.
[0042] Step 2: Roll pressing before battery pre-charging. Use the transmission method to roll the shelved battery, adjust the pressure and speed of the rolling during the rolling process, the pressure is 0.1MPa, and the rolling speed is 2 m / s. When the battery is placed, the bottom is parallel to the pressing roller. Specifically refer to figure 1 shown;
[0043] Step 3: Then pre-charge the rolled battery. The pre-charging process is consistent with the pre-charging process of industrially produced lithium-ion batteries. The pre-charging rate is 0.01C, 0.05C, 0.1C, 0.2C;
[0044] Step 4: During the prefilling process, some gas will be generated due to the formation of the SEI film. The diaphragm is further shape...
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