Electrode Laminate Recovery Using Dry Ice Particle Separation
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Solution Overview
Problem
Conventional methods for recycling electrode materials from batteries often result in unusable electrode laminates during the manufacturing stage, leading to waste, as defects occur when the electrode material is laminated on current collector foils, making it impossible to use the electrode laminate.
Innovation Solution
A method involving unwinding and transporting an electrode laminate roll, where dry ice particles are sprayed onto the laminate to crush and separate the electrode material from the current collector foil, with optional gas blowing and tension adjustment to facilitate separation and minimize defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional disassembly methods are used to recycle electrode materials, then battery end-of-life recycling is achieved, but manufacturing-stage defective electrode laminates cannot be recovered efficiently
Solution Approach 1:
The patent changes the physical state parameter of CO2 from gaseous to solid (dry ice particles) to create a mechanical crushing effect. This parameter change enables the electrode material to be crushed and separated from the current collector foil, allowing recovery of defective laminates from manufacturing stages that would otherwise be wasted.
Solution Approach 2:
The patent utilizes the phase transition of CO2 from solid (dry ice) to gas (sublimation) to achieve both crushing and separation functions. The solid particles provide mechanical impact for crushing, while the subsequent gas phase facilitates removal of debris and current collector foil separation, enabling efficient recovery without complex disassembly.
2Manufacturing precision
If electrode laminate is laminated on current collector foil during manufacturing, then electrode structure is formed, but defects occur making the laminate unusable
Solution Approach 1:
The patent segments the electrode laminate into two separate components: the electrode material and the current collector foil. By spraying dry ice particles that crush the electrode material and separate it from the foil, defective laminates are divided into recoverable electrode material and reusable current collector foil, eliminating the need to discard the entire defective laminate.
Solution Approach 2:
The patent extracts the electrode material from the current collector foil through the dry ice particle impact and separation process. This extraction allows the electrode material to be recovered and reused in new electrode production, while the current collector foil can be cleaned and reused, thereby salvaging components from defective laminates.
3Productivity
If dry ice particles are sprayed onto electrode laminate, then electrode material is crushed and separated from current collector foil, but additional equipment and process steps are required
Solution Approach 1:
The patent uses pneumatic delivery of dry ice particles through a spray system to achieve rapid crushing and separation. The gas-phase CO2 delivery mechanism enables fast particle distribution across the electrode laminate surface, achieving high-speed separation that improves productivity despite adding spray equipment.
Solution Approach 2:
The patent replaces conventional mechanical disassembly systems with a pneumatic particle impact system. Instead of using mechanical rollers, blades, or manual disassembly equipment, the invention uses sprayed dry ice particles to crush and separate materials, simplifying the overall system while maintaining high separation speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively recovers and separates electrode materials, such as positive and negative electrode active materials, from current collector foils, enabling their reuse and recycling, while minimizing defects and promoting the reuse of current collector foils.
Implementation Method 1
spraying dry ice particles onto the electrode laminate during transport and crushing the electrode material to separate the electrode material from the current collector foil
Implementation Method 2
spraying dry ice particles onto the electrode laminate
Data Source
AI summary
A method of recovering an electrode material of the present disclosure comprises:providing an electrode laminate roll in which an electrode laminate is wound, wherein the electrode laminate includes a current collector foil and an electrode material laminated on at least one surface of the current collector foil,unwinding the electrode laminate from the electrode laminate roll and transporting the electrode laminate in the longitudinal direction, andspraying dry ice particles onto the electrode laminate during transport and crushing the electrode material to separate the electrode material from the current collector foil.