SLUAAH5 November   2022 BQ25171-Q1

 

  1.   Abstract
  2.   Trademarks
  3. 1 Introduction
  4. 2 Li-Ion Overview
  5. 3 Li-Ion Applications
  6. 4 LiFePO4 Overview
  7. 5 LiFePO4 Applications
  8. 6 NiMH Overview
  9. 7 NiMH Applications
  10. 8 Super Capacitors
  11. 9 Super Capacitor Applications
  12. 10Summary
  13. 11References

4 LiFePO4 Overview

The Lithium Iron Phosphate Battery(LFP) is a relatively new type and has a chemistry similar to Lithium Li-ion battery. LFP advantage is the longer life and higher number of charge cycles, 4X or 2000 vs 500 for Li-Ion. The chemistry has a higher degree of chemical stability with a reduced risk of thermal run away which makes them safer.

LFP has lower cell voltage 3.6 V to 2 V results in lower power density. This can require a boost converter or two cell configurations for some applications.

While risk of thermal runaway and fire is much lower with LFP, shipping restrictions are the same as Li-Ion due to lithium and risk of fire.



Figure 4-1 LiFePO4 Charge Profile