How does volumetric energy density affect a battery pack?

The higher the volumetric energy density is, the smaller the battery pack can be (assuming the same energy content). It's not the only metric, as there is also the gravimetric energy density, which tells how much energy can be stored per weight unit. The higher it is, the lighter the battery pack can be.

What is the energy density of a rechargeable battery?

This pioneering battery exhibited higher energy density value up to 130 Wh kg −1 (gravimetric) and 280 Wh L −1 (volumetric). The Table 1 illustrates the energy densities of initial rechargeable LIBs introduced commercially, accompanied by the respective company names .

How much energy does a lithium ion battery store?

In their initial stages, LIBs provided a substantial volumetric energy density of 200 Wh L −1, which was almost twice as high as the other concurrent systems of energy storage like Nickel-Metal Hydride (Ni-MH) and Nickel-Cadmium (Ni-Cd) batteries .

Why is volumetric energy density important for electric vehicles?

We often focus on the gravimetric energy density to make electric vehicles lighter and thus improve efficiency and range. However, the volumetric energy density is also very important for EVs, to make the battery smaller and fit inside the vehicle, increasing space for other elements and the passenger/cargo compartment.

Are lithium-ion batteries a good energy storage device?

1. Introduction Among numerous forms of energy storage devices, lithium-ion batteries (LIBs) have been widely accepted due to their high energy density, high power density, low self-discharge, long life and not having memory effect , .

Which energy storage device has the highest energy density?

Despite being one of the highest energy density energy storage devices, the energy density of LIB is still significantly less than that of gasoline. Hence, the number of LIB cells required for achieving a driving range of 200–300 miles is more.