LiFePO4 - aspecialbreedof lithium-ion batteries
Lithium-iron-phosphate (LiFePO4) batteriesarebasedon the original lithium-ion chemistry, but LiFePO4 is usedasthecathode material instead of lithium cobalt dioxide(LiCoO2).Thelatter is found in the most commonly used batteriesinlaptops,cell phones, MP3 players, etc.
LiFePO4 is an intrinsically safercathodematerialthan LiCoO2 since exothermic reactions can not occurinbatteriesbased on this material: LiFePO4 cells do not incinerateorexplodeunder extreme conditions. In addition, LiFePO4 cells haveahigherdischarge current, are not toxic and have a much highercyclelifethan LiCoO2 cells.
The above characteristics make LiFePO4theidealchemistry for electric vehicle applications.
LiFePO4 cells can be purchased fromvarioussupplierswith diverse characteristic and price levels. Theart ofengineeringa full-sized EV battery system is to select thepropercells, designthe battery pack and battery management system(BMS)-takinggeometric, thermal and electric constraints intoaccount-and selectthe appropriatecharger.
LIFEPO4 BATTERY SYSTEMS