BATTERY MANUFACTURING PROCESS TO REDUCE SWELLING
A battery is charged and discharged during a battery manufacturing formation process according to a current and voltage profile. The duration of the charging at a high voltage level is maintained for an extended time period, thereby saturating a solid electrolyte interface (SEI) during the formation process and reducing a swelling of the battery.
1 . A process for manufacturing a battery comprising:
charging and discharging the battery during a battery manufacturing formation process according to a current and voltage profile;
wherein a duration of the charging at a high voltage level is maintained for an extended time period, thereby saturating a solid electrolyte interface (SEI) during the formation process and reducing a swelling of the battery.
2 . The process for manufacturing a battery of claim 1 , wherein the extended time period comprises at least one minute.
3 . The process for manufacturing a battery of claim 1 , wherein the extended time period comprises at least 25% of a charge cycle.
4 . The process for manufacturing a battery of claim 1 , wherein the current and voltage profile comprises a range based a specification of the battery and a voltage limit.
5 . The process for manufacturing a battery of claim 1 , wherein the charging at a high voltage for an extended time period comprises fluctuations in the high voltage level during the extended time period.
6 . A process for manufacturing a battery comprising:
charging and discharging a battery during a battery manufacturing formation process according to a current and voltage profile;
wherein a rate of the charging and discharging is based on a voltage range associated with the charging and discharging, thereby saturating a solid electrolyte interface (SEI) during the formation process and reducing a swelling of the battery.
7 . The process for manufacturing a battery of claim 6 , wherein the voltage range comprises a wider voltage range for a smaller current.
8 . The process for manufacturing a battery of claim 6 , wherein the voltage range comprises a narrower voltage range for a larger current.
9 . The process for manufacturing a battery of claim 6 , wherein a duration of the charging at the voltage range is maintained for an extended time period.
10 . The process for manufacturing a battery of claim 9 , wherein the extended time period comprises at least one minute.
11 . A process for manufacturing a battery comprising:
charging and discharging a battery during a battery manufacturing formation process according to a current and voltage profile;
wherein a temperature at which the battery is charged varies as a function of a cutoff voltage of the charging, thereby saturating a solid electrolyte interface (SEI) during the formation process and reducing a swelling of the battery.
12 . The process for manufacturing a battery of claim 11 , wherein the temperature is at a higher level when the cutoff voltage is at a lower level.
13 . The process for manufacturing a battery of claim 11 , wherein the temperature is at a lower level when the cutoff voltage is at a higher level.
14 . The process for manufacturing a battery of claim 11 , wherein a duration of the charging is maintained for an extended time period.
15 . The process for manufacturing a battery of claim 14 , wherein the extended time period comprises at least one minute.