We've removed these Samsung 94Ah cells from residential energy storage packs by milling off the laser-welded bus bars, then drilling and tapping the electrode to install 1/4"-20 studs. We use an industrial mill for each operation, which ensures repeatability and safety of the cells. Even the tapping operation is done on the mill.
These cells are great for many different applications ranging from stationary storage to EVs. In fact, they're used in the BMW i3, Fiat 500e, VW e-Golf and other EVs, and we've used them in applications ranging from solar backup to golf carts.
See the data sheet right here.
Tested
We tested the first few batteries we produced, charging at 30 amps and discharging at 50 amps. They tested at 99Ah with no hot spots or fireworks, and impedance was right at 0.50mΩ. All cells are checked and charged to ~3.6v for shipping per IASA and DOT regulations.
Highlights
From Samsung:
Li-Ion prismatic Samsung 94 Ah special cell for EV and energy storage applications provides long cycle life > 3.200 cycles by Nickel-cobalt-manganese (NCM) technology.
Technical specification:
- Nominal voltage of the cell is 3.7 V and the operational voltage is 2.75 V – 4.15 V.
- Recommend charging/discharging current is 0.33 C (31 A)
- Cycle life: 3,200 cycles at 80 % DoD (Deep of Discharge) up to 80 % residual capacity (at discharge current 94 A)
- Maximum discharge current is 1 C continuously and peak 4.3 C (413 A, <5 s).
- Maximum charging current is 0.5 C continuously
- Dimensions: 173 x 125 x 45 mm
- Charging temperature: 0° C ~ 60° C
- Discharging temperature: -25° C ~ 60° C
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