Newbie
Joined: 19/11/2017
Location: AustraliaPosts: 21
| Posted: 10:31am 21 Feb 2018 |
New 50 Ah lithium polymer LiFePO4 3.2 V cells . Available in 2 months for $3 per Ah plus postage or transport by road only .
(75Ah and 90Ah) on the way
<3 milliOhm resistance
>3000 cycles
2C max Discharge
Voltage range: 2.6-3.6V
case alloy
1.450 Kilo
4 cells in series = 12.8V nominal /50 amp hours 6 Kilos $ 600
16 cells in series = 51.2V nominal /50 Amp hours 24 Kilos $2400
see wiki here
The LiFePO4 battery uses a lithium-ion-derived chemistry and shares many advantages and disadvantages with other lithium-ion battery chemistries. However, there are significant differences.
LFP chemistry offers a longer cycle life than other lithium-ion approaches.
Like nickel-based rechargeable batteries (and unlike other lithium ion batteries),LiFePO4 batteries have a very constant discharge voltage. Voltage stays close to 3.2 V during discharge until the cell is exhausted. This allows the cell to deliver virtually full power until it is discharged. And it can greatly simplify or even eliminate the need for voltage regulation circuitry.