Understanding the Risks of Aging Lithium Batteries
Manufacturing Stages of Lithium Batteries
The production of lithium batteries consists of three critical stages: electrode fabrication, cell assembly, and battery activation. During the activation phase, lithium battery chemicals are fully charged to enhance electrochemical stability. The crucial steps in this activation include pre-charging, formation, and aging, among others.
The Process of Battery Aging
Battery aging involves storing fully assembled lithium batteries after charging cycles at varying temperatures. This aids in the penetration of the electrolyte, enhancing lithium battery stability. It also promotes certain side reactions, ensuring rapid stabilization of electrochemical performance in lithium batteries.
Parameters Influencing Lithium Battery Aging
1. Charging State: The state of charge or voltage level during aging affects lithium battery stability and performance.
2. Storage Temperature: Temperature influences chemical reactions within lithium batteries, impacting their aging rate and stability.
3. Aging Duration: The time for which lithium batteries are stored impacts cost-effectiveness. Optimizing conditions can reduce aging time.
The Dangers of Fully Charged Lithium Batteries
When lithium batteries are fully charged post-activation, they are prone to thermal runaway. Research indicates that a higher state of charge increases risks of thermal explosions, making fully charged lithium batteries more dangerous.
Conclusion
High SOC levels increase the risk of explosion in lithium batteries. It's crucial to assess safety risks in battery activation, especially for large-sized power lithium batteries to prevent fires and explosions.