We often look at the (volumetric) energy density (Wh/litre) and specific (gravimetric) energy density (Wh/kg), but if we divide one by the other we get the material density of cells.
Using the cell database we can plot this versus the volumetric energy density and pull out the chemistry families.
From this we can see:
- density ranges between 1 and 3.5 kg/litre (1 – 3.5g/cc or 1000 to 3500kg/m3)
- density increases with energy density
Most importantly perhaps is that this gives you a feel for the cell level material density.
This post has been built based on the support of and sponsorship from: Resonate Testing Ltd, Quarto Technical Services, Eatron Technologies and About:Energy
OK, we could do the same calculation for a battery pack but that then includes a lot more components and maybe not so clear.
See also: Pack Mass