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A few key points for the power loss are in the table below:
| Current (A) | Power Loss (W) | Note |
|---|---|---|
| 15 | 12.8 | Target current for cruising |
| 20 | 22.8 | Safe estimate for cruising current |
| 30 | 51.3 | Max Continuous Current at Nominal Voltage (4kW at 3.635V/cell) |
| 50 | 142.5 | Between max and peak current |
| 76 | 329.2 | Max Peak Current at Nominal Voltage (10kW at 3.635V/cell) |
| 100 | 570.0 | Battery Pack Design Target |
| 130 | 963.3 | BPS Current Limit Hard Cutoff |
Doing a linear fit (not a line) to the data, gives us a total pack resistance of 57mOhms. I did this using scipy in python - its a super powerful tool that is handy to know how to use. This was easier than adding up all the resistances individually, but is the exact same in principle.
So, our equation for power loss is below:
POWER = CURRENT2 * 0.057 Ohms