Are aging stress factors affecting battery energy storage systems?

A case study reveals the most relevant aging stress factors for key applications. The amount of deployed battery energy storage systems (BESS) has been increasing steadily in recent years.

Why should a Bess battery be aging aware?

Operating a BESS under consideration of the relevant stress factors provides an opportunity to slow down battery aging. Aging aware operation therefore promises higher profits over the BESS lifetime and more resource-efficient use of the battery cells.

What factors affect battery aging?

The rate of battery aging itself depends on multiple external stress factors , which enables the operator to influence the aging behavior through the operating conditions. For the purpose of BESS operation, battery aging can be grouped into calendar and cyclic aging.

How does battery aging affect economic viability?

On a system level, battery aging manifests itself in decreasing usable capacity and increasing charge/discharge losses over a BESS lifetime , . This in turn directly affects the economic viability of a BESS, as less profit from the application can be generated in later years compared to the beginning of life , .

Do power system operations need to consider degradation characteristics of battery energy storage?

Abstract: Power system operations need to consider the degradation characteristics of battery energy storage (BES) in the modeling and optimization. Existing methods commonly bridge the mapping from charging and/or discharging behaviors to the BES degradation cost with fixed parameters.

How does temperature affect the aging of lithium-ion batteries?

In summary, temperature, C-rate, and DOD significantly impact the aging of lithium-ion batteries. Therefore, controlling these operating conditions is key to extending battery life and maintaining optimal performance. Download: Download high-res image (788KB)