Thermal aging of energy storage electrical equipment

Do aging batteries have thermal safety?

Current research primarily analyzes the aging condition of batteries in terms of electrochemical performance but lacks in-depth exploration of the evolution of thermal safety and its mechanisms. The thermal safety of aging batteries is influenced by electrode materials, aging paths, and environmental factors.

Does aging affect the thermal safety of aging lithium-ion batteries?

These studies have revealed that the thermal safety of aging lithium-ion batteries is affected by the aging path. Aging changes the thermal stability of the materials inside the battery, which in turn affects the thermal safety.

Does high-temperature aging affect the thermal stability of a battery?

As shown in Fig. 6, the onset temperatures for the self-heating reaction and thermal runaway of the battery decreased after high-temperature storage and cyclic aging, indicating that high-temperature aging reduces the thermal stability of the battery.

How does uneven heat production affect battery aging?

They established a model for uneven heat production of batteries, revealing that higher rates result in increased temperature distribution unevenness within the battery. This, in turn, leads to uneven lithium plating on the surface of the anode, accelerating battery aging.

Does low-temperature aging accelerate battery aging?

Although low-temperature environments are unavoidable in practical applications, it is well-documented that these thermal conditions accelerate battery aging and promote distinct aging mechanisms . A schematic diagram of the degradation mechanisms of batteries during high and low-temperature aging is shown in Fig. 5. Fig. 5.

How does storage temperature affect the aging of LFP batteries?

Kassem et al. investigated the impact of different storage temperatures (30 °C, 45 °C, and 60 °C) and SOCs (30 %, 65 %, and 100 %) on the calendar aging of LFP batteries over 8 months, finding significant capacity fade at higher storage temperatures, with side reactions at the anode being the main cause.