Definition: Energy Density(能量密度，包括体积比能量和质量比能量）
• The energy density of a cell is a measure of how
much energy can be stored in the cell per unit
volume or per unit weight.
♦ E (watt-hours) = cell voltage x capacity rating
• Energy density per unit volume is called the
“volumetric energy density” and is expressed in
terms of watt-hours/liter (wh/l).
• Energy density per unit weight is called the
“gravimetric energy density” and is expressed
in terms of watt-hours/kilogram (wh/kg).
• These measurements are useful when you are
trying to determine which cell has the most
capacity per unit volume or weight.