The Specifications Of The (LiFePO4) Batteries.

September 10, 2016

 

 

     The lithium iron phosphate (LiFePO4) battery, also called LFP battery

 (with "LFP" standing for "lithium ferrophosphate"), is a type of rechargeable battery, specifically a lithium-ion battery,which uses LiFePO4 as a cathodematerial. LiFePO4 batteries have somewhat lower energy density than the more common LiCoO2 design found in consumer electronics, but offer longer lifetimes, better power density (the rate that energy can be drawn from them) and are inherently safer. LiFePO4 is finding a number of roles in vehicle use and backup power.

 

Lithium iron phosphate battery
Specific energy    90–110 Wh/kg (320–400 J/g or kJ/kg)
Energy density    220 Wh/L (790 kJ/L)
Specific power    around 200 W/kg [1]
Energy/consumer-price    3.0-24 Wh/US$[2]
Time durability    >10 years
Cycle durability    2,000 cycles
Nominal cell voltage    3.2 V

Specifications

  • Cell voltage

    • Min. discharge voltage = 2.5V [14]

    • Working voltage = 3.0 ~ 3.3 V

    • Max. charge voltage = 3.65V

  • Volumetric energy density = 220 Wh/dm3 (790 kJ/dm3)

  • Gravimetric energy density > 90 Wh/kg[15] (> 320 J/g)

  • 100% DOD cycle life (number of cycles to 80% of original capacity) = 2,000–7,000[16]

  • 10% DOD cycle life (number of cycles to 80% of original capacity) > 10,000 [17]

  • Sony Fortelion: 71% capacity after 8,000 cycles with 100% DOD[18]

  • Cathode composition (weight)

    • 90% C-LiFePO4, grade Phos-Dev-12

    • 5% Carbon EBN-10-10 (superior graphite)

    • 5% PVDF

  • Cell configuration

    • Carbon-coated aluminium current collector 15

    • 1.54 cm2 cathode

    • Electrolyte: Ethylene carbonate-Dimethyl carbonate (EC-DMC) 1-1 LiClO4 1M

    • Anode: Graphite or Hard Carbon with intercalated Metallic lithium

  • Experimental conditions:

    • Room temperature

    • Voltage limits: 2.0–3.65 V

    • Charge: Up to C/1 rate up to 3.6 V, then constant voltage at 3.6 V until I < C/24

  • According to the manufacturer BYD the lithium iron phosphate battery of the electric car e6 is charged at a fast charging station within 15 minutes to 80%, after 40 minutes at 100.

  • The LiFePO4 battery uses a lithium-ion-derived chemistry and has many advantages over other lithium-ion battery chemistry.

However, there are significant differences which we are going to be  discussing  in our next article.
(Information gotten from wikipedia (september 04 2016)

 

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