Battery high temperature aging container

Are lithium-ion batteries safe during high-temperature aging?

Understanding the thermal safety evolution of lithium-ion batteries during high-temperature usage conditions bears significant implications for enhancing the safety management of aging batteries. This work investigates the thermal safety evolution mechanism of lithium-ion batteries during high-temperature aging.

How does aging affect aging batteries?

Furthermore, the loss of active materials and active lithium during aging contributes to a decline in both the maximum temperature and the maximum temperature rise rate, ultimately indicating a decrease in the thermal hazards of aging batteries.

Do lithium-ion batteries undergo cyclic aging and calendar aging?

Similarities arise in the thermal safety evolution and degradation mechanisms for lithium-ion batteries undergoing cyclic aging and calendar aging. Employing multi-angle characterization analysis, the intricate mechanism governing the thermal safety evolution of lithium-ion batteries during high-temperature aging is clarified.

Why is thermal safety important when analyzing battery aging?

Besides analyzing battery aging, it is crucial to consider thermal safety in these phases. For safety purposes, batteries are typically maintained at a low state of charge (SOC) . However, despite this precaution, incidents involving LIBs during storage and transport are not uncommon.

How does high temperature aging affect electrolyte aging?

During high-temperature aging, the electrolyte will decompose, resulting in gas generation and local electrolyte drying. The generated gas will change the distance between the electrodes, and the local electrolyte drying will cause the local potential to change.

How does high-temperature aging affect electrochemical performance?

With the depletion of electrolyte and gas generation, the growth of lithium dendrites becomes more severe. As a result, the electrochemical performance of the cell significantly deteriorates during high-temperature aging. Fig. 8. Thermal safety evolution mechanism during high-temperature aging.