Battery Deactivation via Lithium Carbonate Passivation
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Solution Overview
Problem
Lithium-ion batteries pose a significant waste management challenge due to thermal runaway risks during recycling, and existing discharge methods do not adequately address residual lithium, leading to potential fires and unsafe handling.
Innovation Solution
A method involving the use of an oxidizing fluid and carbon dioxide to treat lithium-containing batteries, which involves oxidizing fluid and carbon dioxide to treat lithium-containing batteries, which involves oxidizing fluid and carbon dioxide to form lithium carbonate within the batteries, thereby passivating remaining lithium and mitigating thermal runaway risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing discharge methods are used to handle lithium-ion batteries, then the batteries can be processed for recycling, but thermal runaway risks and fires occur due to residual lithium
Solution Approach 1:
The patent converts the harmful residual lithium into a stable compound by reacting it with carbon dioxide to form lithium carbonate. This transforms the dangerous reactive lithium into a safe, stable substance that eliminates thermal runaway risk while enabling safe recycling processing
Solution Approach 2:
The patent uses carbon dioxide as a reactive agent that chemically reacts with residual lithium through oxidation to form lithium carbonate. This chemical reaction effectively neutralizes the residual lithium that causes thermal runaway, converting it into a stable endpoint product
2Productivity
If lithium-ion batteries are recycled without adequate deactivation, then recycling efficiency increases, but potential fires and unsafe handling occur
Solution Approach 1:
The patent applies a preliminary deactivation treatment to lithium-ion batteries before they enter the recycling process. By reacting residual lithium with carbon dioxide to form stable lithium carbonate in advance, the batteries are rendered safe for subsequent recycling operations, eliminating fire hazards while maintaining recycling efficiency
3Ease of operation
If residual lithium is not adequately addressed, then battery processing is simpler and faster, but thermal runaway and fires occur during recycling
Solution Approach 1:
The patent extracts and neutralizes the harmful residual lithium component from the battery by reacting it with carbon dioxide to form lithium carbonate. This removes the thermal runaway risk factor while leaving the rest of the battery components available for recycling, achieving both safety and operational simplicity
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 method effectively deactivates lithium-ion batteries by forming a passivating layer of lithium carbonate, reducing the risk of thermal runaway and facilitating safe handling and recycling of lithium-containing batteries, thereby ensuring safe recycling and disposal of lithium-ion batteries.
Implementation Method 1
A method involving the use of an oxidizing fluid and carbon dioxide to treat lithium-containing batteries, which involves oxidizing fluid and carbon dioxide to form lithium carbonate within the batteries, thereby passivating remaining lithium and mitigating thermal runaway risks.
Data Source
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AI summary
Examples are disclosed of methods to deactivate a lithium-containing battery. One example provides a method for discharging a lithium-containing battery, the method comprising adding the lithium-containing battery to a vessel, adding an oxidizing fluid to the vessel, adding carbon dioxide to the vessel, pressurizing the vessel, heating the vessel to form lithium carbonate within the lithium-containing battery, reducing heat and pressure in the vessel, and removing the battery from the vessel.