As the integration of renewable energy sources into the grid intensifies, the efficiency of Battery Energy Storage Systems (BESSs), particularly the energy efficiency of the ubiquitous lithium-ion batteries they employ, is becoming a pivotal factor for energy storage management.
Abstract: Recent times have witnessed significant progress in battery technology due to the growing demand for energy storage systems in various applications. Consequently, battery efficiency has become a crucial aspect of modern battery technology since it directly influences battery performance and lifespan.
Therefore, even if lithium-ion battery has a high CE, it may not be energy efficient. Energy efficiency, on the other hand, directly evaluates the ratio between the energy used during charging and the energy released during discharging, and is affected by various factors.
This information will help in understanding battery behaviour and the impact of efficiency on battery technology development. Ignoring battery efficiency can result in lower performance and reduced battery lifespan, hampering battery technology progress.
Battery energy storage systems (BESS) Electrochemical methods, primarily using batteries and capacitors, can store electrical energy. Batteries are considered to be well-established energy storage technologies that include notable characteristics such as high energy densities and elevated voltages .
The battery is charged with a power of 21.6kW (9% of 240kW) until the battery energy reaches 80% SoC, at which point the battery discharges providing 240kW (100%) for 30s. The cycle is then repeated. Comparison of the energy in and out during the charge and discharge phases, respectively, gives a round-trip efficiency of ɳ = 84.7%.