LiFePO4 Li-ion battery—— New pattern、Safe、EV power Li-ion battery

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Presentation transcript:

LiFePO4 Li-ion battery—— New pattern、Safe、EV power Li-ion battery

Characteristic of LiFePO4 LiFePO4 material is safe than LiCoO2 & LiMn2O4 for it’s stable structure can be kept very well under continuous charging & discharging situations. The superior high temperature & storage performance make LiFePO4 the most suitable one for Li-ion battery positive material. Longer than 1000 cycle life is more suitable for application use.

Characteristic of LiFePO4 With a higher capacity reaches 170mAh,LiFePO4 much more better than LiCoO2’s 145mAh & LiMn2O4’s 148mAh per gram in characteristic. LiFePO4’s discharge plateau is more even than due to it’s lower discharge voltage, which is 3.2~3.3V, lower than normal LiCoO2 & LiMn2O4 material’s 3.6~3.7 V. The superexcellent high current discharge performance can be used under 7C’s continuous & 20C’s instant situations.

Characteristic of LiFePO4 With the abundant Fe & P resources & low cost, LiFePO4 is recognized as the prior positive material for electric power application by the Li-ion battery industry.

LiFePO4/LiCoO2/LiMn2O4 performance comparison   LiFePO4 LiCoO2 LiMn2O4 Theoretic capacity per gram(mAh/g) 170 145 148 Discharge plateau(V) 3.2~3.3 3.6~3.7 Cycle life >1000 cycle >500 cycle >300 cycle Hi-temp performance(℃) >75 0~45 Safety Superior Normal Better Hi-current discharge 10C>5 min Instant>20C Instant>25C Worse

LiFePO4 Li-ion battery HLP18650P(1200Mah) HLP18500P(1000Mah)

LiFePO4 Li-ion battery performance(18650/1200mAh) Cycle life(1C5A charge/7C5A discharge)

LiFePO4 Li-ion battery performance(18650/1200mAh) Cycle life(Hi-temp. 60 ℃ 1C charge/discharge)

LiFePO4 Li-ion battery performance(18650/1200mAh) Discharge curve

LiFePO4 Li-ion battery performance(18650/1200mAh) High current discharge performance

LiFePO4 Li-ion battery performance(18650/1200mAh) Safety(Overcharge test with 3C5A/10V)

LiFePO4 Li-ion battery performance(18650/1200mAh) Safety(Heat shock test in 150℃ 30MIN)

LiFePO4 Li-ion battery performance(18650/1200mAh) Safety(short circuit test)

LiFePO4 Li-ion battery performance(18650/1200mAh) Safety(Needle test)

LiFePO4 Li-ion battery performance(18650/1200mAh) Safety(Impact test) Conduct free drop impaction with 10 kg hammer on the fully charged batteries fixed in the test platform The surface temperature reached 89 & 99 after the test then the temperature slow down, no fire & explosion occurred.The battery passed impact test. See the demo…….

LiFePO4 Li-ion battery performance(18650/1200mAh) Hi-temp. short circuit(60 ℃ )

Safe LiFePO4 Li-ion battery Demo of VALENCE product performance Demo of crush test Demo of needle test Demo of impact test

Application of LiFePO4 Li-ion battery in electric tools Comparison of Hypercell battery & SONY battery (Black & Decker LI3000 mode electric tools ) Battery type Capacity #of Cell Working Voltage Max Current Min Current Initial Current Charging current Charging Voltage Discharge cut-off voltage 18650 1200mAh 1 3.6/3.2V 9A 2A 3.5A 270mA 4.2V 2.5V/2.0V

Application of LiFePO4 Li-ion battery in electric tools Black & Decker LI3000 mode electric tools

Application of LiFePO4 Li-ion battery in electric tools SONY battery   0.5C 1C 5C 10C 1# 1132mAh 1128 mAh 1102 mAh 1106 mAh 2# 1121 mAh 1117 mAh 1109 mAh 1100 mAh 1# 1C/0.5C=99.6%, 5C/0.5C=97.3%, 10C/0.5C=97.7% 2# 1C/0.5C=99.6%, 5C/0.5C=98.9%, 10C/0.5C=98.1%

Application of LiFePO4 Li-ion battery in electric tools Hypercell battery   0.5C 1C 5C 7C 10C 1# 1341 1351 1353 1339 1255 2# 1280 1286 1285 1262 1195 1# 1C/0.5C= 100.7% 5C/0.5C=100.9% 7C/0.5C=99.9% 10C/0.5C=93.1% 2# 1C/0.5C=100.5% 5C/0.5C=100.4% 7C/0.5C=98.6% 10C/0.5C=93.4%

Application of LiFePO4 Li-ion battery in electric tools Except for the discharge performance in 10 C5A status is a little lower than SONY product, Hypercell battery’s capacity is about 10 percent higher than SONY product. The test shows that Hypercell 18650 battery’s application test time is 46 minutes, while SONY product’s time is only 42 minutes with the 2A current unload test & 9A current loaded test,3.5A current start up test status.

Conclusion There will be a great transform in electric application Li-ion with LiFePO4 material’s superior low cost、Safety、Heat stable and discharge characteristics etc.