Recovery of contaminant free battery materials
OwnerJeffrey S. Spangenberger, Bryant J. Polzin +1inventors
InventorsJeffrey S. Spangenberger, Bryant J. Polzin, Jessica L. Durham
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Abstract
A method for producing clean black mass, anode or cathode for subsequent recycling is provided, the method comprising subjecting an intact battery to a shredding process to produce an aggregate, wherein the smallest particle generated is between 2.5 percent and 40 percent of original battery size. Also provided is a shredder for minimizing aggregation of whole batteries, the shredder comprising a shaft defining a longitudinal axis and a latitudinal axis; and a plurality of teeth disposed on said knives which fit on said shaft at an angle to the latitudinal axis selected from 15 degrees and 45 degrees, wherein the teeth have a first proximal end integrally molded to the shaft and a second free distal end.
Claims12
A direct recycling method for producing contaminant free battery material from a whole battery, the method comprising:
- subjecting the whole battery to a single pass shredding step to produce shredding residue, wherein less than 5 weight percent of the shredding residue is less than 500 microns in diameter, wherein the shredding process utilizes knives having tips spaced from each other a distance equal to a width of the teeth, and the laminates have an aspect ratio between 2:1 and 1:1 with a single pass of the whole battery through the shredding process.
Dependencies are inferred from the claim text.