Impurity Processing Device for Electric Storage Devices
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Solution Overview
Problem
Conventional methods for removing metal impurities from solid-liquid mixtures used in electronic devices, such as lithium-ion batteries, are inadequate, particularly for nonmagnetic metals, leading to insufficient treatment rates and potential short circuits due to unresolved impurities.
Innovation Solution
An impurity processing device and method that applies an electric field between electrodes to ionize and miniaturize metal impurities in the mixture, using a power supply to cause a current of 0.1 mA or more, allowing for their removal or deposition on electrode surfaces, effectively addressing the treatment of both magnetic and nonmagnetic metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnetic removal method is used, then magnetic metal impurities can be removed, but nonmagnetic metal impurities cannot be removed
Solution Approach 1:
The invention changes the physical parameter used for impurity removal from magnetic property to electrical conductivity. By applying an electric field that causes current flow (0.1 mA or more) through the solid-liquid mixture, the system utilizes the electrical conductivity difference between metal impurities and the surrounding medium to remove all metal impurities regardless of their magnetic properties, thereby resolving the limitation of magnetic-only removal methods
Solution Approach 2:
The invention replaces the magnetic field-based removal mechanism with an electric field-based mechanism. Instead of using magnetic attraction forces that only affect magnetic metals, the system applies an electric field that generates current flow through conductive metal particles, enabling removal of both magnetic and nonmagnetic metals through electrostatic or electrodynamic effects
2Productivity
If conventional magnetic removal method is used, then treatment process is simple, but treatment rate of impurities is insufficient
Solution Approach 1:
The invention introduces a new parameter threshold (current of 0.1 mA or more) that directly controls impurity removal efficiency. By setting and maintaining this minimum current level through the solid-liquid mixture, the system achieves high treatment rates for all metal impurities while keeping the device structure relatively simple, consisting mainly of electrodes and a power supply
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
The solution significantly increases the treatment rate of metal impurities, preventing short circuits and maintaining the performance of electronic devices by miniaturizing or removing impurities, even if they remain in the mixture, thereby enhancing the reliability of electric storage devices.
Implementation Method 1
applies an electric field between electrodes to ionize and miniaturize metal impurities in the mixture
Implementation Method 2
a power supply that causes a current of 0.1 mA or more to flow between the first electrode and the second electrode
Data Source
AI summary
An impurity processing device is a device for processing metal impurities contained in a solid-liquid mixture for forming an electrode of an electric storage device, and includes a first electrode and a second electrode that apply an electric field to the solid-liquid mixture, and a power supply that causes a current of 0.1 mA or more to flow between the first electrode and the second electrode.