Johan
Off-grid energy systems enthusiast.
Summary
LFP cells from XCell seem to be transcendentally epic in terms of mass energy density (Wh/kg). Has anyone measured the actual maximum capacity and the mass of any cell from XCell? I wonder if the specs from this factory are met in practice and whether they are still as safe as expected from LFP chemistry.
Problem context
Which batteries or cells to choose when designing for a combination of minimum weight and "plenty" of safety? Due to space restrictions, I probably need individual cells.
Analysis
Minimizing weight calls for the comparison of energy mass densities. In general, for the "safe" LFP batteries, it is
Now check out this cell,
For comparison,
Question
Can Anyone confirm the XCell maximum capacity?
References
[1] https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery
[2] https://batteryuniversity.com/learn/article/types_of_lithium_ion
[3] https://battlebornbatteries.com/shop/12v-lifepo4-deep-cycle-battery
[4] https://www.electriccarpartscompany.com/Lithium-Battery-277Ah-LiFePO4-XCell
[5] http://store.evtv.me/proddetail.php?prod=esp32bms (open the user manual PDF)
Keywords: LiFePo; LiFePo4; X-Cell; mass; weight; minimum
LFP cells from XCell seem to be transcendentally epic in terms of mass energy density (Wh/kg). Has anyone measured the actual maximum capacity and the mass of any cell from XCell? I wonder if the specs from this factory are met in practice and whether they are still as safe as expected from LFP chemistry.
Problem context
Which batteries or cells to choose when designing for a combination of minimum weight and "plenty" of safety? Due to space restrictions, I probably need individual cells.
Analysis
Minimizing weight calls for the comparison of energy mass densities. In general, for the "safe" LFP batteries, it is
- 90 to 110 Wh/kg according to Wikipedia [1],
- 90 to 120 Wh/kg according to BatteryUniversity.com [2].
- Battleborn: 100Ah x 4cell x 3.2Vnom / 14.1kg = 91 Wh/kg (price: ~$741/kWh) [3].
Now check out this cell,
- XCell: 277Ah x 3.2Vnom / 5.6kg = 158 Wh/kg (price: ~$360/kWh) [4].
For comparison,
- Tesla Model S module: 5.2kWh / 24.9kg = 208 Wh/kg (price: ~$200/kWh) [5].
Question
Can Anyone confirm the XCell maximum capacity?
References
[1] https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery
[2] https://batteryuniversity.com/learn/article/types_of_lithium_ion
[3] https://battlebornbatteries.com/shop/12v-lifepo4-deep-cycle-battery
[4] https://www.electriccarpartscompany.com/Lithium-Battery-277Ah-LiFePO4-XCell
[5] http://store.evtv.me/proddetail.php?prod=esp32bms (open the user manual PDF)
Keywords: LiFePo; LiFePo4; X-Cell; mass; weight; minimum
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