LiFePO4 battery string specifications

What is a lithium iron phosphate (LiFePO4) battery?

Lithium Iron Phosphate (LiFePO4) batteries are one of the plethora of batteries to choose from when choosing which battery to use in a design. Their good thermal performance, resistance to thermal runaway and long cycle life are what sets LiFePO4 batteries apart from the other options.

What is the charge profile of a LiFePO4 battery?

This charge profile is a standard Pre-charge, CC, and CV charge profile, however, since LiFePO4 and Li-ion batteries have different voltage profiles, these stages in the charge profile happen at different voltages. For Li-ion batteries, VOREG≈ 3.9-4.2 V, VPrecharge ≈ 3.0 V, and VShort ≈ 2.0 V.

What are the advantages and disadvantages of LiFePO4 batteries?

As previously mentioned, the main advantages of LiFePO4 are their thermal stability, low chances of going into thermal runaway, longer cycle life, and higher discharge current. However, due to their low energy density, LiFePO4 batteries typically take up more space compared to Li-ion batteries.

What is a LiFePO4 battery?

The LiFePO4 technology has better thermal and chemical stability, which improves battery safety and packed with power in a small and lightweight footprint. Easily uses the same space as your existing 12V battery and replaces lead acid, AGM or Gel battery applications in RVs, boats, commercial vehicles, off grid back up power and much more.

What SoC should A LiFePO4 battery be charged to?

When comparing LiFePO4 to Li-ion batteries, LiFePO4 perform better when they are charged to a SOC of 100% because LiFePO4’s SOC vs OCV profile has a smaller slope for higher SOC compared to Li-ion batteries. However, as can be seen in Table 2-2, charging LiFePO4 to a SOC of 80% to preserve its cycle life becomes essentially impractical.

Do LiFePO4 batteries need a boost converter?

However, LiFePO4 batteries have a lower energy density and lower charge voltage, so they typically have to take up more area compared to a Li-ion battery. Furthermore, due to the lower charge voltage, a LiFePO4 battery may need a boost converter when a Li-ion may not.