Positive Electrode Peeling with Partitioned Shock Wave Delivery

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Solution Overview

Problem

Existing methods for separating positive electrode current collectors and composites in lithium ion and solid-state batteries face issues such as weakened shock wave intensity due to electrolyte conductivity, potential container damage, and metal contamination from electric pulse discharge.

Innovation Solution

A peeling apparatus with a partitioned current-carrying and shock wave delivery area, using a power supply device to generate high-voltage pulses, effectively separates the positive electrode composite from the current collector by generating and delivering shock waves through a stainless steel partition plate, preventing metal mixing and maintaining wave intensity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If electric pulse discharge is used to generate shock waves in water for separating positive electrode components, then separation capability is improved, but shock wave intensity is weakened due to electrolyte conductivity

Engineering Contradiction:

Improveseparation capabilityVSAvoidshock wave intensity

Core Design Contradiction:

ProductivityVSForce

Solution Approach 1:

The apparatus is divided into a current-carrying area for generating shock waves and a shock wave delivery area for receiving them, separated by a partition plate. This segmentation allows the current-carrying area to maintain high dielectric strength for strong shock wave generation while the delivery area handles the positive electrode plate, resolving the contradiction between separation capability and shock wave intensity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A partition plate serves as an intermediary that transmits shock waves from the current-carrying area to the shock wave delivery area while preventing direct contact between the electrolyte and the water in the delivery area. This mediator maintains shock wave intensity by blocking the harmful effect of electrolyte conductivity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If electric pulse discharge is applied to separate positive electrode components, then separation efficiency is improved, but container damage occurs and metal contamination is introduced

Engineering Contradiction:

Improveseparation efficiencyVSAvoidcontainer damage and metal contamination

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

By segmenting the apparatus into current-carrying and shock wave delivery areas separated by a partition plate, the invention confines the electric pulse discharge to the current-carrying area. This prevents direct interaction between the discharge and the container in the delivery area, eliminating container damage and metal contamination while maintaining separation efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The partition plate acts as an intermediary barrier that protects the container and prevents metal contamination. It allows shock waves to pass through while blocking the harmful effects of electric pulse discharge, including direct contact with the container and potential metal mixing.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 apparatus efficiently separates the positive electrode components while preventing metal contamination and maintaining shock wave intensity, ensuring effective recovery of valuable metals like nickel, cobalt, and manganese.

Implementation Method 1

a shock wave generated in the current-carrying area is delivered through the partition plate to the positive electrode plate in the shock wave delivery area

Methodology Applied

Scientific EffectShock wave: Shock Wave

Implementation Method 2

since the positive electrode plate contains an electrolyte, electric conductivity of the water is improved, resulting in weakening dielectric breakdown intensity and reducing a force of the shock waves

Methodology Applied

Scientific EffectDielectric breakdown: Dielectric

Data Source

PatentUS20250300260A1Peeling apparatus for positive electrode current collector and positive electrode composite

Publication Date: 2025.09.25 HONDA MOTOR CO LTD

AI summary

Provided is a peeling apparatus for a positive electrode current collector and a positive electrode composite, the peeling apparatus including: a current-carrying area including an electrode; a shock wave delivery area configured to house a positive electrode plate; a partition plate configured to partition between both the areas; and a power supply device configured to supply electric power to the electrode, the peeling apparatus being configured to peel off the positive electrode composite from the positive electrode current collector of the positive electrode plate in such a manner that a discharge occurs between the electrode and the partition plate and a shock wave generated in the current-carrying area is delivered through the partition plate to the positive electrode plate in the shock wave delivery area.