Electrolyte reinjection method and electrolyte-reinjectable secondary battery
AssigneeLG Energy Solution, Ltd.
InventorsJi Eun Lee, Eun Ju Lee, Young Eun Choi
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Abstract
A method for reinjecting an electrolyte, and a secondary battery capable of being reinjected with an electrolyte are described. The method for reinjecting an electrolyte is a method for reinjecting an electrolyte into a secondary battery in which an electrode assembly and an electrolyte are accommodated in a pouch. The pouch includes an aluminum sheet, in which a functional hole is formed, and a polymer layer stacked on the aluminum sheet. The method includes a reinjection process of injecting an additional electrolyte into the pouch through the functional hole by opening the functional hole, and a sealing process of sealing the functional hole after the reinjection process.
Claims20
A method for reinjecting an electrolyte into a secondary battery having an electrode assembly and an electrolyte accommodated in a pouch comprising an aluminum sheet with a functional hole formed therein, and a first polymer layer stacked on the aluminum sheet on a first side of the aluminum sheet and covering the functional hole and a second polymer layer stacked on the aluminum sheet on a second side and covering the functional hole, the method comprising:
- injecting an additional electrolyte into the pouch through the functional hole by accessing the functional hole through the first and second polymer layers;
- and
- sealing the functional hole after the reinjection process.
A secondary battery, configured for being reinjected with an electrolyte, comprising:
- an electrode assembly in which electrodes and separators are alternately stacked to be combined with each other;
- and
- a pouch in which the electrode assembly is accommodated,
- wherein the pouch comprises an aluminum sheet, and a first polymer layer laminated with the aluminum sheet on a first side of the aluminum sheet and a second polymer layer laminated with the aluminum sheet on a second side of the aluminum sheet,
- a functional hole formed in the aluminum sheet, wherein the first and second polymer layers cover the functional hole, and
- a coating part provided on an inner circumferential surface of the functional hole in the aluminum sheet.
Dependencies are inferred from the claim text.