Project
cell nominal capacity-2200mAh
dimensions-Height(65mm)xdiameter(18.4mm)
weight-45g
nominal voltage-3.7v
internal resistance -≤ 80mΩ
| Vehicle weight | 250kg | ||
| Motor power | 40Kw,110V | ||
| Range | 200Km | ||
| Speed | 50km/hr | ||
| To calcualte current | |||
| Current withdrawn from the motor | 40000/110 | 363.6363636A | |
| Assume current loss | 1.05 | ||
| After loss new current | 381.8181818 | A | |
| At max speed | |||
| Power at max speed | 42000 | 42Kw | |
| Travel factor | 200/50 | 4 | |
| Power based on travel factor | 168000 | 168Kw | |
| Battery pack capacity based on efficiency | 168000/0.85 | 197647.0588 | |
| Battery pack capacity based on motor efficiency | 197647.1 | 232.5259516Kw | |
| Series & parallel connection | |||
| No of series connection | 29.72972973 | 30 | |
| No of parallel connection | 90.90909091 | 91 | |
| Total no of battery | 2730 |
i)Type of cell - Cylindrical NMC
v)Weight of the battery pack =2730*0.045=122kg
Total capacity=2730*3.7*2.2=22.22Kwh
vi)Cell connection technique = Spot welding
vii) Tests that you would perform for the battery mechanical stability and safety
Vibration test
Shoc test
Water proof test
Cell short circuit test
Cell overcharge test
Fire resistance test
viii) Recycling process- Pyro process recycling
ix) Reason for thermal runaway
Short circuit
Poor maintenance
Over charing
Ambient temperature