System and method for processing an end-of-life or reduced performance energy storage and/or conversion device using a supercritical fluid

This invention describes a method to refurbish old lithium batteries. It involves first fully discharging the battery, then using a supercritical fluid to extract the old electrolyte and clean waste products from the internal electrodes. After this cleaning, a fresh quantity of electrolyte is added to restore the battery's performance.

Why it matters: Filed before the widespread adoption of lithium batteries in electric vehicles and consumer electronics. The immense increase in end-of-life battery volume now makes efficient refurbishment, especially with advanced cleaning methods, a critical environmental and economic imperative.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedSupercritical fluid extraction equipment, high-pressure vessels

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