Method for recycling lithium secondary battery
A two-stage compression method for lithium-ion battery recycling addresses low tap density issues by increasing material density, improving heat transfer and reaction uniformity, thereby enhancing lithium and metal recovery rates.
WO2026135349A1PCT designated stage Publication Date: 2026-06-25POSCO HLDG INC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- POSCO HLDG INC
- Filing Date
- 2025-12-19
- Publication Date
- 2026-06-25
AI Technical Summary
Technical Problem
Conventional lithium-ion battery recycling methods face reduced heat transfer and reaction efficiency due to low tap density of crushed materials, leading to lower lithium recovery rates and process instability.
Method used
A two-stage compression process is applied to increase the tap density of battery crushed material to 0.6-0.7 g/cm³, using pressures of 50-150 kgf/㎠, with a plate-shaped compression structure and ribs to ensure even distribution, followed by heating in a controlled atmosphere.
Benefits of technology
Improves heat transfer and reaction uniformity during lithium recovery, enhancing lithium recovery rates to 80% or higher and increasing the yield of valuable metals like Li, Ni, Co, and Mn.
✦ Generated by Eureka AI based on patent content.
Abstract
A method for recycling a lithium secondary battery, according to the present invention, comprises the steps of: supplying a battery crushed material to a sagger; compressing the supplied battery crushed material such that a tap density of the supplied battery crushed material satisfies 0.6-0.7 g / cm3; and recovering lithium from the compressed battery crushed material.
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