Lithium Iron Phosphate Battery Discharge Curve

The lithium iron phosphate battery lifepo 4 battery or lfp battery lithium ferrophosphate is a type of lithium ion battery using lifepo 4 as the cathode material on a battery this is the positive side and a graphitic carbon electrode with a metallic backing as the anode the energy density of lifepo 4 is lower than that of lithium cobalt oxide licoo 2 chemistry and also has a lower.

Lithium iron phosphate battery discharge curve.

Lithium iron phosphate battery hereinafter referred to as lithium iron battery as a kind of iron battery has been widely concerned by friends in the industry some people say that lithium iron battery is actually a kind of lithium ion battery as far as iron batteries are concerned they can be divided into high iron batteries and lithium iron batteries. Therefore the gravimetric energy density of lifepo4 battery is 130wh kg four times higher than that of lead acid battery 35wh kg. Stage 1 battery charging is typically done at 30 100 0 3c to 1 0c current of the capacity rating of the battery. Delivers twice power of lead acid battery even high discharge rate while maintaining high energy capacity.

Lithium iron phosphate chemistry eliminates t he r isk of ex pl on or c mb un de to h gh i ac ove r ng. Indeed the voltage. 2 0 c 6. Stage 1 of the sla chart above takes four hours to complete.

Wid er tmp r atue rng. Its specific capacity is more than 145ah kg. A drop in replacement for lead acid batteries. In comparison the lithium iron phosphate lifepo4 cell is a non aqueous system having 3 2v as its nominal voltage during discharge.

This opens up new possibility for a simple but very long life backup battery in 3 3 volt systems. While voltage based soc works reasonably well for a lead acid battery that has rested the flat discharge curve of nickel and lithium based batteries renders the voltage method impracticable. Lithium iron phosphate technology has the flattest discharge curve which makes it very difficult to estimate soc on a simple voltage measurement. However lithium ion batteries have a much flatter discharge curve which means that over a wide operating range the voltage at the battery terminals changes very slightly.

The discharge voltage curves of li manganese li phosphate and nmc are very flat and 80 percent of the stored energy remains in the flat voltage profile. Lead based batteries have a more linear discharge where voltage consistently drops over time. The voltage curve of a lithium ion battery is much different than that of a lead acid battery. The stage 1 of a lithium battery can take as little as one hour to complete making a lithium battery available for use four times faster than sla.