DC battery cabinet battery aging

Are batteries aging?

Batteries are widely used across various applications, from everyday electronics to electric vehicles and large-scale energy storage systems. However, with increased use over time, battery aging is inevitable.

What happens if a battery ages?

These aging phenomena will result in increased battery resistance, battery short circuit, and other consequences . Separator aging is generally not considered in accelerated aging studies. This is because it has little impact on battery capacity in the early stage of battery lifetime.

How does accelerated aging affect a battery?

Accelerated aging at high temperatures may cause massive heat accumulation inside the battery, resulting in the thermal runaway of the battery, which is why the temperature rarely exceeds 60 °C in actual accelerated aging research. High-temperature cycling also affects the degradation of battery active materials.

How does a battery age?

When the battery is operated at the appropriate SOC and DOD, it experiences a relatively low aging rate. This is primarily attributed to the linear accumulation of side reactions over time, which serves as the main mechanism of aging. When a battery is overcharged or overdischarged (i.e., SOC, DOD > 100%), new side reactions will be induced.