Battery specific power

What is specific energy in a car battery?

Specific Energy (Wh/kg) – The nominal battery energy per unit mass, sometimes referred to as the gravimetric energy density. Specific energy is a characteristic of the battery chemistry and packaging. Along with the energy consumption of the vehicle, it determines the battery weight required to achieve a given electric range.

How do you calculate specific energy and power of a battery?

Following this, the corresponding values of specific energy (E * ) and specific power (P * ) are chosen according to and by considering state-of-theart battery characteristics (mentioned in section II-C). The total values for energy and power are found by multiplying corresponding specific values with battery mass. ... ...

What does specific power mean?

Specific power, or gravimetric power density, indicates loading capability. Batteries for power tools are made for high specific power and come with reduced specific energy (capacity). Figure 1 illustrates the relationship between specific energy (water in bottle) and specific power (spout opening).

What does energy mean in a battery?

Energy or Nominal Energy (Wh (for a specific C-rate)) – The “energy capacity” of the battery, the total Watt-hours available when the battery is discharged at a certain discharge current (specified as a C-rate) from 100 percent state-of-charge to the cut-off voltage.

Which type of battery has the highest specific energy?

(LCO stands for Li-cobalt, the original Li-ion.) Figure 15: Typical specific energy of lead-, nickel- and lithium-based batteries. NCA enjoys the highest specific energy; however, manganese and phosphate are superior in terms of specific power and thermal stability. Li-titanate has the best life span.

What is the difference between specific energy and specific power?

The specific energy shown here is the energy delivered by the cell during discharge, normalized to the cell mass. The specific power is the average power delivered by the cell during discharge, normalized to the cell mass. For ASSBs, the weight of the cell casing and current collectors is omitted here.