Patent ID: 11955613
Assignee: WORCESTER POLYTECHNIC INSTITUTE
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. In a recycling stream of exhausted secondary batteries, a method of recycling charge materials from the batteries for use in production of recycled batteries, comprising:
receiving a granular mass from a recycling stream based on dismantled batteries, the recycling stream including a plurality of charge materials defined by a battery chemistry of the dismantled batteries, each charge material of the plurality of charge materials defined by a metal and having an oxidation state, the battery chemistry defining a ratio of the charge materials for inclusion in a recycled battery;
adding a leach acid to the granular mass for reducing a pH of the leach solution to dissolve the charge materials in the leach solution, the leach acid selected based on an oxidation state of metal ions defining the dissolved charge materials in the leach solution;
performing a ratio adjustment of the charge materials for achieving a predetermined molar ratio of the charge materials in the leach solution; and
adding a base to the leach solution for raising the pH to precipitate a granular form of compounds of the charge materials, the granular form defining a charge material precursor responsive to sintering to form the recycled batteries.