Energy storage derating

What is battery degradation-aware current derating?

Battery Degradation-Aware Current Derating: An Effective Method to Prolong Lifetime and Ease Thermal... To ensure the safe and stable operation of lithium-ion batteries in battery energy storage systems (BESS), the power/current is de-rated to prevent the battery from going outside the safe operating range.

What are the advantages of derating a battery?

In comparison to standard derating, we achieve: (1) increase of battery lifetime by 65%; (2) increase in energy throughput over lifetime by 49%; (3) While energy throughput per year is reduced by only 9.5%. Content may be subject to copyright. Derating algorithms: Barreras et al., IEEE IES IECON, 2018.

Can derating become a new standard in current derating?

In comparison to standard derating, the degradation-aware derating achieves: (1) increase of battery lifetime by 65%; (2) increase in energy throughput over lifetime by 49%, while III) energy throughput per year is reduced by only 9.5%. These results suggest that the derating framework can become a new standard in current derating.

How long do static derating methods extend battery life?

We quantify the lifetime extension and derating factor of the experimentally validated static derating methods using Eqs (1), (2), (3), (4), as illustrated in Table 5. When the derating factor is less than one, the derating methods extend battery lifetime by a maximum of ∼400% and a minimum of ∼41%.

What is derating a battery?

Operational strategy Derating is the practice of limiting the performance of a battery to ensure safe operation or to prolong lifetime . Here it is used to limit charging and discharging currents under conditions that will accelerate degradation. A total of three scenarios were investigated for each location.

Do derating factors affect battery life extension?

When quantifying the performance implications of static and dynamic derating techniques, we find that derating factors less than 1 result in battery lifetime extension between 41% and 400% for the experimentally validated derating methods considered.