1、1,LiFePO4 performance,2006-06-21,2,Outline,What is LiFePO4? Discharge curve GSM discharge High temperature Storage Low temperature discharge Cycle life Overcharge Fire exposure,3,What is LiFePO4?,LiFePO4 is a new kind of positive material. LiFePO4 also has the function that release or receive Li-ion
2、 like LiCoO2.,LiFePO4,Olivine structure FePO4,Olivine structure LiFePO4,Charge,Discharge,4,Discharge curve,LiFePO4 has the same discharge curve as LiCoO2. LiFePO4 has the lower MPV (Mid-point voltage) than LiCoO2. MPV of LiFePO4 is 3.13.2V, MPV of LiCoO2 is 3.63.7V.,5,GSM discharge,Following shows G
3、SM discharge curve (cut off voltage is 2.8V).,6,High temperature Storage,Following show storage results of LiFePO4 and LiCoO2 system .,LiCoO2,LiFePO4,7,Low temperature discharge,Following shows discharge of different temperature.,8,Cycle life,LiFePO4 structure keeps stable before and after discharge
4、, so it has good cycle life. Basing on experience of other projects, LiFePO4 cycle life can be more than 1000.,Olivine structure FePO4,Olivine structure LiFePO4,Charge,Discharge,9,Overcharge,LiFePO4 has good safety performance. Following show 1C/12V overcharge result.,10,Overcharge,Following show 1C
5、/12V overcharge curve and cell photos.,Before test,After test,11,Overcharge,LiFePO4 has good safety performance. Following show 3C/32V overcharge result.,12,Overcharge,Following show 3C/32V overcharge curve and cell photos.,After test,13,Fire exposure,LiFePO4 has good safety performance. Following show the fire exposure result.,Before test,After test,14,Thanks,
