Energy density is an important indicator of lithium battery performance, what does it exactly mean?

　　Energy density is often mentioned when we discuss the performance of lithium batteries, so what does the concept of energy density mean?

　　Energy density refers to the amount of energy stored in a unit of certain space or mass matter.

　　The energy density of a battery is the electric energy released by the average unit volume or mass of the battery.

　　The energy density of a battery is generally divided into two dimensions: weight energy density and volume energy density.

　　battery weight energy density = battery capacity × discharge platform/weight, the basic unit is Wh/kg (watt hour/kg)

　　Battery volume energy density = battery capacity × discharge platform/volume, the basic unit is Wh/L (watt hour/liter)

　　The greater the energy density of the battery, the more electricity stored per unit volume or weight.

　　The energy density is determined by the material characteristics of the battery, and different materials affect the service life of the lithium battery pack.

　　Lithium-ion battery (LIB) has become the main energy storage solution in modern social life. Among them, lithium iron phosphate batteries are a perfect replacement for lead-acid batteries, and they are the first choice for grid-connected peak shaving, off-grid energy storage, photovoltaic energy storage, UPS, data center and other industries.