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US 12,658,473 B2Granted
Method for manufacturing gel polymer electrolyte secondary battery and gel polymer electrolyte secondary battery obtained thereby
AssigneeLG Energy Solution, Ltd.
InventorsJung-Hoon Lee, Yong-Hee Kang, Ji-Hoon Ryu, Yeo-Min Yoon, Jae-Won Lee, Bum-Young Jung
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Abstract
The present disclosure relates to a method for manufacturing a secondary battery including a gel polymer electrolyte and a secondary battery obtained thereby. The method can inhibit thermal crosslinking of a gel polymer electrolyte during the wetting with an electrolyte, and facilitate thermal crosslinking after the wetting with an electrolyte is finished. In addition, the method can increase uniformity of thermal crosslinking by controlling the oxygen content in a cell.
Claims14
A method for manufacturing a lithium secondary battery, comprising:
- inserting a stack cell comprising a separator interposed between a positive electrode and a negative electrode to a battery casing;
- injecting a composition for a gel polymer electrolyte into the battery casing to which the stack cell is inserted;
- sealing the battery casing under oxygen-containing atmosphere;
- aging the battery casing after the sealing;
- removing oxygen from the battery casing;
- thermally curing the battery casing;
- and
- degassing by pressurizing the battery casing to remove the gases remaining in the battery, wherein the removing oxygen is a step of pressurizing the battery casing, by pressurizing a region where the electrode assembly is positioned, oxygen present in the region wherein the electrode assembly is positioned is transferred to a region where the electrode assembly is not present.
5 more elements
Dependencies are inferred from the claim text.