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Ubify Media & Design Operations
UI/UX & DIGITAL MEDIA SPECIALISTS
About This Tool
Calculate total voltage, ampacity, and energy density when assembling cylindrical lithium-ion cells into custom battery packs. Features thermal ampacity calculations for pure nickel strips and copper busbars to prevent spot-weld failures and fires.
How to Use
- 1
Select cell chemistry: Li-ion NMC (3.6V/4.2V), LiFePO4 (3.2V/3.65V), or LTO (2.3V/2.8V).
- 2
Set Series (S) and Parallel (P) cell counts, along with single cell Ah and continuous discharge rating.
- 3
Review computed nominal voltage, full charge cutoff, total kWh capacity, and continuous wattage.
- 4
Inspect recommended nickel strip layer counts and interactive series-parallel physical matrix diagram.
Frequently Asked Questions
How much current can a standard 0.15mm x 8mm pure nickel strip carry?
A single 0.15mm x 8mm pure nickel strip can safely carry approximately 4 to 5 Amperes continuous without exceeding a 15°C temperature rise. Higher current requires multiple spot-welded layers or copper-nickel sandwich busbars.
What is the difference between Li-ion NMC and LiFePO4?
NMC cells offer higher volumetric energy density (3.6V nominal, 250 Wh/kg) ideal for portable e-bikes and drones, whereas LiFePO4 (3.2V nominal, 160 Wh/kg) provides superior thermal stability, non-combustibility, and 3,000+ deep cycles for home solar storage.